1 /*
2 * Copyright (c) 1999, 2017, 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 "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/dependencyContext.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/compileLog.hpp"
33 #include "compiler/compilerOracle.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "oops/methodData.hpp"
41 #include "oops/method.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/nativeLookup.hpp"
44 #include "prims/whitebox.hpp"
45 #include "runtime/arguments.hpp"
46 #include "runtime/atomic.hpp"
47 #include "runtime/compilationPolicy.hpp"
48 #include "runtime/init.hpp"
49 #include "runtime/interfaceSupport.hpp"
50 #include "runtime/javaCalls.hpp"
51 #include "runtime/os.hpp"
52 #include "runtime/sharedRuntime.hpp"
53 #include "runtime/sweeper.hpp"
54 #include "runtime/timerTrace.hpp"
55 #include "trace/tracing.hpp"
56 #include "utilities/dtrace.hpp"
57 #include "utilities/events.hpp"
58 #ifdef COMPILER1
59 #include "c1/c1_Compiler.hpp"
60 #endif
61 #if INCLUDE_JVMCI
62 #include "jvmci/jvmciCompiler.hpp"
63 #include "jvmci/jvmciRuntime.hpp"
64 #include "jvmci/jvmciJavaClasses.hpp"
65 #include "runtime/vframe.hpp"
66 #endif
67 #ifdef COMPILER2
68 #include "opto/c2compiler.hpp"
69 #endif
70 #ifdef SHARK
71 #include "shark/sharkCompiler.hpp"
72 #endif
73
74 #ifdef DTRACE_ENABLED
75
76 // Only bother with this argument setup if dtrace is available
77
78 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
79 { \
80 Symbol* klass_name = (method)->klass_name(); \
81 Symbol* name = (method)->name(); \
82 Symbol* signature = (method)->signature(); \
83 HOTSPOT_METHOD_COMPILE_BEGIN( \
84 (char *) comp_name, strlen(comp_name), \
85 (char *) klass_name->bytes(), klass_name->utf8_length(), \
86 (char *) name->bytes(), name->utf8_length(), \
87 (char *) signature->bytes(), signature->utf8_length()); \
88 }
89
90 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
91 { \
92 Symbol* klass_name = (method)->klass_name(); \
93 Symbol* name = (method)->name(); \
94 Symbol* signature = (method)->signature(); \
95 HOTSPOT_METHOD_COMPILE_END( \
96 (char *) comp_name, strlen(comp_name), \
97 (char *) klass_name->bytes(), klass_name->utf8_length(), \
98 (char *) name->bytes(), name->utf8_length(), \
99 (char *) signature->bytes(), signature->utf8_length(), (success)); \
100 }
101
102 #else // ndef DTRACE_ENABLED
103
104 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
105 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
106
107 #endif // ndef DTRACE_ENABLED
108
109 bool CompileBroker::_initialized = false;
110 volatile bool CompileBroker::_should_block = false;
111 volatile jint CompileBroker::_print_compilation_warning = 0;
112 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
113
114 // The installed compiler(s)
115 AbstractCompiler* CompileBroker::_compilers[2];
116
117 // These counters are used to assign an unique ID to each compilation.
118 volatile jint CompileBroker::_compilation_id = 0;
119 volatile jint CompileBroker::_osr_compilation_id = 0;
120
121 // Debugging information
122 int CompileBroker::_last_compile_type = no_compile;
123 int CompileBroker::_last_compile_level = CompLevel_none;
124 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
125
126 // Performance counters
127 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
128 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
129 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
130
131 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
132 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
133 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
134 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
135 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
136
137 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
138 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
139 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
140 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
141
142 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
143 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
144 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
145 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
146 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
147 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
148 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
149
150 // Timers and counters for generating statistics
151 elapsedTimer CompileBroker::_t_total_compilation;
152 elapsedTimer CompileBroker::_t_osr_compilation;
153 elapsedTimer CompileBroker::_t_standard_compilation;
154 elapsedTimer CompileBroker::_t_invalidated_compilation;
155 elapsedTimer CompileBroker::_t_bailedout_compilation;
156
157 int CompileBroker::_total_bailout_count = 0;
158 int CompileBroker::_total_invalidated_count = 0;
159 int CompileBroker::_total_compile_count = 0;
160 int CompileBroker::_total_osr_compile_count = 0;
161 int CompileBroker::_total_standard_compile_count = 0;
162
163 int CompileBroker::_sum_osr_bytes_compiled = 0;
164 int CompileBroker::_sum_standard_bytes_compiled = 0;
165 int CompileBroker::_sum_nmethod_size = 0;
166 int CompileBroker::_sum_nmethod_code_size = 0;
167
168 long CompileBroker::_peak_compilation_time = 0;
169
170 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
171 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
172
173
174
175 class CompilationLog : public StringEventLog {
176 public:
177 CompilationLog() : StringEventLog("Compilation events") {
178 }
179
180 void log_compile(JavaThread* thread, CompileTask* task) {
181 StringLogMessage lm;
182 stringStream sstr = lm.stream();
183 // msg.time_stamp().update_to(tty->time_stamp().ticks());
184 task->print(&sstr, NULL, true, false);
185 log(thread, "%s", (const char*)lm);
186 }
187
188 void log_nmethod(JavaThread* thread, nmethod* nm) {
189 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
190 nm->compile_id(), nm->is_osr_method() ? "%" : "",
191 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
192 }
193
194 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
195 StringLogMessage lm;
196 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
197 if (retry_message != NULL) {
198 lm.append(" (%s)", retry_message);
199 }
200 lm.print("\n");
201 log(thread, "%s", (const char*)lm);
202 }
203
204 void log_metaspace_failure(const char* reason) {
205 ResourceMark rm;
206 StringLogMessage lm;
207 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
208 lm.print("\n");
209 log(JavaThread::current(), "%s", (const char*)lm);
210 }
211 };
212
213 static CompilationLog* _compilation_log = NULL;
214
215 bool compileBroker_init() {
216 if (LogEvents) {
217 _compilation_log = new CompilationLog();
218 }
219
220 // init directives stack, adding default directive
221 DirectivesStack::init();
222
223 if (DirectivesParser::has_file()) {
224 return DirectivesParser::parse_from_flag();
225 } else if (CompilerDirectivesPrint) {
226 // Print default directive even when no other was added
227 DirectivesStack::print(tty);
228 }
229
230 return true;
231 }
232
233 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
234 CompilerThread* thread = CompilerThread::current();
235 thread->set_task(task);
236 #if INCLUDE_JVMCI
237 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
238 task->set_jvmci_compiler_thread(thread);
239 }
240 #endif
241 CompileLog* log = thread->log();
242 if (log != NULL) task->log_task_start(log);
243 }
244
245 CompileTaskWrapper::~CompileTaskWrapper() {
246 CompilerThread* thread = CompilerThread::current();
247 CompileTask* task = thread->task();
248 CompileLog* log = thread->log();
249 if (log != NULL) task->log_task_done(log);
250 thread->set_task(NULL);
251 task->set_code_handle(NULL);
252 thread->set_env(NULL);
253 if (task->is_blocking()) {
254 bool free_task = false;
255 {
256 MutexLocker notifier(task->lock(), thread);
257 task->mark_complete();
258 #if INCLUDE_JVMCI
259 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
260 if (!task->has_waiter()) {
261 // The waiting thread timed out and thus did not free the task.
262 free_task = true;
263 }
264 task->set_jvmci_compiler_thread(NULL);
265 }
266 #endif
267 if (!free_task) {
268 // Notify the waiting thread that the compilation has completed
269 // so that it can free the task.
270 task->lock()->notify_all();
271 }
272 }
273 if (free_task) {
274 // The task can only be freed once the task lock is released.
275 CompileTask::free(task);
276 }
277 } else {
278 task->mark_complete();
279
280 // By convention, the compiling thread is responsible for
281 // recycling a non-blocking CompileTask.
282 CompileTask::free(task);
283 }
284 }
285
286 /**
287 * Add a CompileTask to a CompileQueue.
288 */
289 void CompileQueue::add(CompileTask* task) {
290 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
291
292 task->set_next(NULL);
293 task->set_prev(NULL);
294
295 if (_last == NULL) {
296 // The compile queue is empty.
297 assert(_first == NULL, "queue is empty");
298 _first = task;
299 _last = task;
300 } else {
301 // Append the task to the queue.
302 assert(_last->next() == NULL, "not last");
303 _last->set_next(task);
304 task->set_prev(_last);
305 _last = task;
306 }
307 ++_size;
308
309 // Mark the method as being in the compile queue.
310 task->method()->set_queued_for_compilation();
311
312 if (CIPrintCompileQueue) {
313 print_tty();
314 }
315
316 if (LogCompilation && xtty != NULL) {
317 task->log_task_queued();
318 }
319
320 // Notify CompilerThreads that a task is available.
321 MethodCompileQueue_lock->notify_all();
322 }
323
324 /**
325 * Empties compilation queue by putting all compilation tasks onto
326 * a freelist. Furthermore, the method wakes up all threads that are
327 * waiting on a compilation task to finish. This can happen if background
328 * compilation is disabled.
329 */
330 void CompileQueue::free_all() {
331 MutexLocker mu(MethodCompileQueue_lock);
332 CompileTask* next = _first;
333
334 // Iterate over all tasks in the compile queue
335 while (next != NULL) {
336 CompileTask* current = next;
337 next = current->next();
338 {
339 // Wake up thread that blocks on the compile task.
340 MutexLocker ct_lock(current->lock());
341 current->lock()->notify();
342 }
343 // Put the task back on the freelist.
344 CompileTask::free(current);
345 }
346 _first = NULL;
347
348 // Wake up all threads that block on the queue.
349 MethodCompileQueue_lock->notify_all();
350 }
351
352 /**
353 * Get the next CompileTask from a CompileQueue
354 */
355 CompileTask* CompileQueue::get() {
356 // save methods from RedefineClasses across safepoint
357 // across MethodCompileQueue_lock below.
358 methodHandle save_method;
359 methodHandle save_hot_method;
360
361 MutexLocker locker(MethodCompileQueue_lock);
362 // If _first is NULL we have no more compile jobs. There are two reasons for
363 // having no compile jobs: First, we compiled everything we wanted. Second,
364 // we ran out of code cache so compilation has been disabled. In the latter
365 // case we perform code cache sweeps to free memory such that we can re-enable
366 // compilation.
367 while (_first == NULL) {
368 // Exit loop if compilation is disabled forever
369 if (CompileBroker::is_compilation_disabled_forever()) {
370 return NULL;
371 }
372
373 // If there are no compilation tasks and we can compile new jobs
374 // (i.e., there is enough free space in the code cache) there is
375 // no need to invoke the sweeper. As a result, the hotness of methods
376 // remains unchanged. This behavior is desired, since we want to keep
377 // the stable state, i.e., we do not want to evict methods from the
378 // code cache if it is unnecessary.
379 // We need a timed wait here, since compiler threads can exit if compilation
380 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
381 // is not critical and we do not want idle compiler threads to wake up too often.
382 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
383 }
384
385 if (CompileBroker::is_compilation_disabled_forever()) {
386 return NULL;
387 }
388
389 CompileTask* task;
390 {
391 NoSafepointVerifier nsv;
392 task = CompilationPolicy::policy()->select_task(this);
393 }
394
395 if (task != NULL) {
396 // Save method pointers across unlock safepoint. The task is removed from
397 // the compilation queue, which is walked during RedefineClasses.
398 save_method = methodHandle(task->method());
399 save_hot_method = methodHandle(task->hot_method());
400
401 remove(task);
402 purge_stale_tasks(); // may temporarily release MCQ lock
403 }
404
405 return task;
406 }
407
408 // Clean & deallocate stale compile tasks.
409 // Temporarily releases MethodCompileQueue lock.
410 void CompileQueue::purge_stale_tasks() {
411 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
412 if (_first_stale != NULL) {
413 // Stale tasks are purged when MCQ lock is released,
414 // but _first_stale updates are protected by MCQ lock.
415 // Once task processing starts and MCQ lock is released,
416 // other compiler threads can reuse _first_stale.
417 CompileTask* head = _first_stale;
418 _first_stale = NULL;
419 {
420 MutexUnlocker ul(MethodCompileQueue_lock);
421 for (CompileTask* task = head; task != NULL; ) {
422 CompileTask* next_task = task->next();
423 CompileTaskWrapper ctw(task); // Frees the task
424 task->set_failure_reason("stale task");
425 task = next_task;
426 }
427 }
428 }
429 }
430
431 void CompileQueue::remove(CompileTask* task) {
432 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
433 if (task->prev() != NULL) {
434 task->prev()->set_next(task->next());
435 } else {
436 // max is the first element
437 assert(task == _first, "Sanity");
438 _first = task->next();
439 }
440
441 if (task->next() != NULL) {
442 task->next()->set_prev(task->prev());
443 } else {
444 // max is the last element
445 assert(task == _last, "Sanity");
446 _last = task->prev();
447 }
448 --_size;
449 }
450
451 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
452 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
453 remove(task);
454
455 // Enqueue the task for reclamation (should be done outside MCQ lock)
456 task->set_next(_first_stale);
457 task->set_prev(NULL);
458 _first_stale = task;
459 }
460
461 // methods in the compile queue need to be marked as used on the stack
462 // so that they don't get reclaimed by Redefine Classes
463 void CompileQueue::mark_on_stack() {
464 CompileTask* task = _first;
465 while (task != NULL) {
466 task->mark_on_stack();
467 task = task->next();
468 }
469 }
470
471
472 CompileQueue* CompileBroker::compile_queue(int comp_level) {
473 if (is_c2_compile(comp_level)) return _c2_compile_queue;
474 if (is_c1_compile(comp_level)) return _c1_compile_queue;
475 return NULL;
476 }
477
478 void CompileBroker::print_compile_queues(outputStream* st) {
479 st->print_cr("Current compiles: ");
480 MutexLocker locker(MethodCompileQueue_lock);
481
482 char buf[2000];
483 int buflen = sizeof(buf);
484 Threads::print_threads_compiling(st, buf, buflen);
485
486 st->cr();
487 if (_c1_compile_queue != NULL) {
488 _c1_compile_queue->print(st);
489 }
490 if (_c2_compile_queue != NULL) {
491 _c2_compile_queue->print(st);
492 }
493 }
494
495 void CompileQueue::print(outputStream* st) {
496 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
497 st->print_cr("%s:", name());
498 CompileTask* task = _first;
499 if (task == NULL) {
500 st->print_cr("Empty");
501 } else {
502 while (task != NULL) {
503 task->print(st, NULL, true, true);
504 task = task->next();
505 }
506 }
507 st->cr();
508 }
509
510 void CompileQueue::print_tty() {
511 ttyLocker ttyl;
512 print(tty);
513 }
514
515 CompilerCounters::CompilerCounters() {
516 _current_method[0] = '\0';
517 _compile_type = CompileBroker::no_compile;
518 }
519
520 // ------------------------------------------------------------------
521 // CompileBroker::compilation_init
522 //
523 // Initialize the Compilation object
524 void CompileBroker::compilation_init(TRAPS) {
525 _last_method_compiled[0] = '\0';
526
527 // No need to initialize compilation system if we do not use it.
528 if (!UseCompiler) {
529 return;
530 }
531 #ifndef SHARK
532 // Set the interface to the current compiler(s).
533 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
534 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
535
536 #if INCLUDE_JVMCI
537 if (EnableJVMCI) {
538 // This is creating a JVMCICompiler singleton.
539 JVMCICompiler* jvmci = new JVMCICompiler();
540
541 if (UseJVMCICompiler) {
542 _compilers[1] = jvmci;
543 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
544 if (BootstrapJVMCI) {
545 // JVMCI will bootstrap so give it more threads
546 c2_count = MIN2(32, os::active_processor_count());
547 }
548 } else {
549 c2_count = JVMCIThreads;
550 }
551 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
552 } else {
553 c1_count = JVMCIHostThreads;
554 }
555 }
556 }
557 #endif // INCLUDE_JVMCI
558
559 #ifdef COMPILER1
560 if (c1_count > 0) {
561 _compilers[0] = new Compiler();
562 }
563 #endif // COMPILER1
564
565 #ifdef COMPILER2
566 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
567 if (c2_count > 0) {
568 _compilers[1] = new C2Compiler();
569 }
570 }
571 #endif // COMPILER2
572
573 #else // SHARK
574 int c1_count = 0;
575 int c2_count = 1;
576
577 _compilers[1] = new SharkCompiler();
578 #endif // SHARK
579
580 // Start the compiler thread(s) and the sweeper thread
581 init_compiler_sweeper_threads(c1_count, c2_count);
582 // totalTime performance counter is always created as it is required
583 // by the implementation of java.lang.management.CompilationMBean.
584 {
585 EXCEPTION_MARK;
586 _perf_total_compilation =
587 PerfDataManager::create_counter(JAVA_CI, "totalTime",
588 PerfData::U_Ticks, CHECK);
589 }
590
591 if (UsePerfData) {
592
593 EXCEPTION_MARK;
594
595 // create the jvmstat performance counters
596 _perf_osr_compilation =
597 PerfDataManager::create_counter(SUN_CI, "osrTime",
598 PerfData::U_Ticks, CHECK);
599
600 _perf_standard_compilation =
601 PerfDataManager::create_counter(SUN_CI, "standardTime",
602 PerfData::U_Ticks, CHECK);
603
604 _perf_total_bailout_count =
605 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
606 PerfData::U_Events, CHECK);
607
608 _perf_total_invalidated_count =
609 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
610 PerfData::U_Events, CHECK);
611
612 _perf_total_compile_count =
613 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
614 PerfData::U_Events, CHECK);
615 _perf_total_osr_compile_count =
616 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
617 PerfData::U_Events, CHECK);
618
619 _perf_total_standard_compile_count =
620 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
621 PerfData::U_Events, CHECK);
622
623 _perf_sum_osr_bytes_compiled =
624 PerfDataManager::create_counter(SUN_CI, "osrBytes",
625 PerfData::U_Bytes, CHECK);
626
627 _perf_sum_standard_bytes_compiled =
628 PerfDataManager::create_counter(SUN_CI, "standardBytes",
629 PerfData::U_Bytes, CHECK);
630
631 _perf_sum_nmethod_size =
632 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
633 PerfData::U_Bytes, CHECK);
634
635 _perf_sum_nmethod_code_size =
636 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
637 PerfData::U_Bytes, CHECK);
638
639 _perf_last_method =
640 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
641 CompilerCounters::cmname_buffer_length,
642 "", CHECK);
643
644 _perf_last_failed_method =
645 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
646 CompilerCounters::cmname_buffer_length,
647 "", CHECK);
648
649 _perf_last_invalidated_method =
650 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
651 CompilerCounters::cmname_buffer_length,
652 "", CHECK);
653
654 _perf_last_compile_type =
655 PerfDataManager::create_variable(SUN_CI, "lastType",
656 PerfData::U_None,
657 (jlong)CompileBroker::no_compile,
658 CHECK);
659
660 _perf_last_compile_size =
661 PerfDataManager::create_variable(SUN_CI, "lastSize",
662 PerfData::U_Bytes,
663 (jlong)CompileBroker::no_compile,
664 CHECK);
665
666
667 _perf_last_failed_type =
668 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
669 PerfData::U_None,
670 (jlong)CompileBroker::no_compile,
671 CHECK);
672
673 _perf_last_invalidated_type =
674 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
675 PerfData::U_None,
676 (jlong)CompileBroker::no_compile,
677 CHECK);
678 }
679
680 _initialized = true;
681 }
682
683
684 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
685 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
686 JavaThread* thread = NULL;
687 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
688 InstanceKlass* klass = InstanceKlass::cast(k);
689 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
690 Handle string = java_lang_String::create_from_str(name, CHECK_0);
691
692 // Initialize thread_oop to put it into the system threadGroup
693 Handle thread_group (THREAD, Universe::system_thread_group());
694 JavaValue result(T_VOID);
695 JavaCalls::call_special(&result, thread_oop,
696 klass,
697 vmSymbols::object_initializer_name(),
698 vmSymbols::threadgroup_string_void_signature(),
699 thread_group,
700 string,
701 CHECK_0);
702
703 {
704 MutexLocker mu(Threads_lock, THREAD);
705 if (compiler_thread) {
706 thread = new CompilerThread(queue, counters);
707 } else {
708 thread = new CodeCacheSweeperThread();
709 }
710 // At this point the new CompilerThread data-races with this startup
711 // thread (which I believe is the primoridal thread and NOT the VM
712 // thread). This means Java bytecodes being executed at startup can
713 // queue compile jobs which will run at whatever default priority the
714 // newly created CompilerThread runs at.
715
716
717 // At this point it may be possible that no osthread was created for the
718 // JavaThread due to lack of memory. We would have to throw an exception
719 // in that case. However, since this must work and we do not allow
720 // exceptions anyway, check and abort if this fails.
721
722 if (thread == NULL || thread->osthread() == NULL) {
723 vm_exit_during_initialization("java.lang.OutOfMemoryError",
724 os::native_thread_creation_failed_msg());
725 }
726
727 java_lang_Thread::set_thread(thread_oop(), thread);
728
729 // Note that this only sets the JavaThread _priority field, which by
730 // definition is limited to Java priorities and not OS priorities.
731 // The os-priority is set in the CompilerThread startup code itself
732
733 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
734
735 // Note that we cannot call os::set_priority because it expects Java
736 // priorities and we are *explicitly* using OS priorities so that it's
737 // possible to set the compiler thread priority higher than any Java
738 // thread.
739
740 int native_prio = CompilerThreadPriority;
741 if (native_prio == -1) {
742 if (UseCriticalCompilerThreadPriority) {
743 native_prio = os::java_to_os_priority[CriticalPriority];
744 } else {
745 native_prio = os::java_to_os_priority[NearMaxPriority];
746 }
747 }
748 os::set_native_priority(thread, native_prio);
749
750 java_lang_Thread::set_daemon(thread_oop());
751
752 thread->set_threadObj(thread_oop());
753 if (compiler_thread) {
754 thread->as_CompilerThread()->set_compiler(comp);
755 }
756 Threads::add(thread);
757 Thread::start(thread);
758 }
759
760 // Let go of Threads_lock before yielding
761 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
762
763 return thread;
764 }
765
766
767 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
768 EXCEPTION_MARK;
769 #if !defined(ZERO) && !defined(SHARK)
770 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
771 #endif // !ZERO && !SHARK
772 // Initialize the compilation queue
773 if (c2_compiler_count > 0) {
774 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
775 _c2_compile_queue = new CompileQueue(name);
776 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
777 }
778 if (c1_compiler_count > 0) {
779 _c1_compile_queue = new CompileQueue("C1 compile queue");
780 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
781 }
782
783 int compiler_count = c1_compiler_count + c2_compiler_count;
784
785 char name_buffer[256];
786 const bool compiler_thread = true;
787 for (int i = 0; i < c2_compiler_count; i++) {
788 // Create a name for our thread.
789 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
790 CompilerCounters* counters = new CompilerCounters();
791 // Shark and C2
792 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
793 }
794
795 for (int i = c2_compiler_count; i < compiler_count; i++) {
796 // Create a name for our thread.
797 sprintf(name_buffer, "C1 CompilerThread%d", i);
798 CompilerCounters* counters = new CompilerCounters();
799 // C1
800 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
801 }
802
803 if (UsePerfData) {
804 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
805 }
806
807 if (MethodFlushing) {
808 // Initialize the sweeper thread
809 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
810 }
811 }
812
813
814 /**
815 * Set the methods on the stack as on_stack so that redefine classes doesn't
816 * reclaim them. This method is executed at a safepoint.
817 */
818 void CompileBroker::mark_on_stack() {
819 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
820 // Since we are at a safepoint, we do not need a lock to access
821 // the compile queues.
822 if (_c2_compile_queue != NULL) {
823 _c2_compile_queue->mark_on_stack();
824 }
825 if (_c1_compile_queue != NULL) {
826 _c1_compile_queue->mark_on_stack();
827 }
828 }
829
830 // ------------------------------------------------------------------
831 // CompileBroker::compile_method
832 //
833 // Request compilation of a method.
834 void CompileBroker::compile_method_base(const methodHandle& method,
835 int osr_bci,
836 int comp_level,
837 const methodHandle& hot_method,
838 int hot_count,
839 CompileTask::CompileReason compile_reason,
840 bool blocking,
841 Thread* thread) {
842 guarantee(!method->is_abstract(), "cannot compile abstract methods");
843 assert(method->method_holder()->is_instance_klass(),
844 "sanity check");
845 assert(!method->method_holder()->is_not_initialized(),
846 "method holder must be initialized");
847 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
848
849 if (CIPrintRequests) {
850 tty->print("request: ");
851 method->print_short_name(tty);
852 if (osr_bci != InvocationEntryBci) {
853 tty->print(" osr_bci: %d", osr_bci);
854 }
855 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
856 if (!hot_method.is_null()) {
857 tty->print(" hot: ");
858 if (hot_method() != method()) {
859 hot_method->print_short_name(tty);
860 } else {
861 tty->print("yes");
862 }
863 }
864 tty->cr();
865 }
866
867 // A request has been made for compilation. Before we do any
868 // real work, check to see if the method has been compiled
869 // in the meantime with a definitive result.
870 if (compilation_is_complete(method, osr_bci, comp_level)) {
871 return;
872 }
873
874 #ifndef PRODUCT
875 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
876 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
877 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
878 return;
879 }
880 }
881 #endif
882
883 // If this method is already in the compile queue, then
884 // we do not block the current thread.
885 if (compilation_is_in_queue(method)) {
886 // We may want to decay our counter a bit here to prevent
887 // multiple denied requests for compilation. This is an
888 // open compilation policy issue. Note: The other possibility,
889 // in the case that this is a blocking compile request, is to have
890 // all subsequent blocking requesters wait for completion of
891 // ongoing compiles. Note that in this case we'll need a protocol
892 // for freeing the associated compile tasks. [Or we could have
893 // a single static monitor on which all these waiters sleep.]
894 return;
895 }
896
897 if (TieredCompilation) {
898 // Tiered policy requires MethodCounters to exist before adding a method to
899 // the queue. Create if we don't have them yet.
900 method->get_method_counters(thread);
901 }
902
903 // Outputs from the following MutexLocker block:
904 CompileTask* task = NULL;
905 CompileQueue* queue = compile_queue(comp_level);
906
907 // Acquire our lock.
908 {
909 MutexLocker locker(MethodCompileQueue_lock, thread);
910
911 // Make sure the method has not slipped into the queues since
912 // last we checked; note that those checks were "fast bail-outs".
913 // Here we need to be more careful, see 14012000 below.
914 if (compilation_is_in_queue(method)) {
915 return;
916 }
917
918 // We need to check again to see if the compilation has
919 // completed. A previous compilation may have registered
920 // some result.
921 if (compilation_is_complete(method, osr_bci, comp_level)) {
922 return;
923 }
924
925 // We now know that this compilation is not pending, complete,
926 // or prohibited. Assign a compile_id to this compilation
927 // and check to see if it is in our [Start..Stop) range.
928 int compile_id = assign_compile_id(method, osr_bci);
929 if (compile_id == 0) {
930 // The compilation falls outside the allowed range.
931 return;
932 }
933
934 #if INCLUDE_JVMCI
935 if (UseJVMCICompiler) {
936 if (blocking) {
937 // Don't allow blocking compiles for requests triggered by JVMCI.
938 if (thread->is_Compiler_thread()) {
939 blocking = false;
940 }
941
942 // Don't allow blocking compiles if inside a class initializer or while performing class loading
943 vframeStream vfst((JavaThread*) thread);
944 for (; !vfst.at_end(); vfst.next()) {
945 if (vfst.method()->is_static_initializer() ||
946 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
947 vfst.method()->name() == vmSymbols::loadClass_name())) {
948 blocking = false;
949 break;
950 }
951 }
952
953 // Don't allow blocking compilation requests to JVMCI
954 // if JVMCI itself is not yet initialized
955 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
956 blocking = false;
957 }
958
959 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
960 // to avoid deadlock between compiler thread(s) and threads run at shutdown
961 // such as the DestroyJavaVM thread.
962 if (JVMCIRuntime::shutdown_called()) {
963 blocking = false;
964 }
965 }
966 }
967 #endif // INCLUDE_JVMCI
968
969 // We will enter the compilation in the queue.
970 // 14012000: Note that this sets the queued_for_compile bits in
971 // the target method. We can now reason that a method cannot be
972 // queued for compilation more than once, as follows:
973 // Before a thread queues a task for compilation, it first acquires
974 // the compile queue lock, then checks if the method's queued bits
975 // are set or it has already been compiled. Thus there can not be two
976 // instances of a compilation task for the same method on the
977 // compilation queue. Consider now the case where the compilation
978 // thread has already removed a task for that method from the queue
979 // and is in the midst of compiling it. In this case, the
980 // queued_for_compile bits must be set in the method (and these
981 // will be visible to the current thread, since the bits were set
982 // under protection of the compile queue lock, which we hold now.
983 // When the compilation completes, the compiler thread first sets
984 // the compilation result and then clears the queued_for_compile
985 // bits. Neither of these actions are protected by a barrier (or done
986 // under the protection of a lock), so the only guarantee we have
987 // (on machines with TSO (Total Store Order)) is that these values
988 // will update in that order. As a result, the only combinations of
989 // these bits that the current thread will see are, in temporal order:
990 // <RESULT, QUEUE> :
991 // <0, 1> : in compile queue, but not yet compiled
992 // <1, 1> : compiled but queue bit not cleared
993 // <1, 0> : compiled and queue bit cleared
994 // Because we first check the queue bits then check the result bits,
995 // we are assured that we cannot introduce a duplicate task.
996 // Note that if we did the tests in the reverse order (i.e. check
997 // result then check queued bit), we could get the result bit before
998 // the compilation completed, and the queue bit after the compilation
999 // completed, and end up introducing a "duplicate" (redundant) task.
1000 // In that case, the compiler thread should first check if a method
1001 // has already been compiled before trying to compile it.
1002 // NOTE: in the event that there are multiple compiler threads and
1003 // there is de-optimization/recompilation, things will get hairy,
1004 // and in that case it's best to protect both the testing (here) of
1005 // these bits, and their updating (here and elsewhere) under a
1006 // common lock.
1007 task = create_compile_task(queue,
1008 compile_id, method,
1009 osr_bci, comp_level,
1010 hot_method, hot_count, compile_reason,
1011 blocking);
1012 }
1013
1014 if (blocking) {
1015 wait_for_completion(task);
1016 }
1017 }
1018
1019 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1020 int comp_level,
1021 const methodHandle& hot_method, int hot_count,
1022 CompileTask::CompileReason compile_reason,
1023 Thread* THREAD) {
1024 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1025 if (!_initialized || comp_level == CompLevel_none) {
1026 return NULL;
1027 }
1028
1029 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1030 assert(comp != NULL, "Ensure we have a compiler");
1031
1032 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1033 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1034 DirectivesStack::release(directive);
1035 return nm;
1036 }
1037
1038 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1039 int comp_level,
1040 const methodHandle& hot_method, int hot_count,
1041 CompileTask::CompileReason compile_reason,
1042 DirectiveSet* directive,
1043 Thread* THREAD) {
1044
1045 // make sure arguments make sense
1046 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1047 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1048 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1049 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1050 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1051 // allow any levels for WhiteBox
1052 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1053 // return quickly if possible
1054
1055 // lock, make sure that the compilation
1056 // isn't prohibited in a straightforward way.
1057 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1058 if (comp == NULL || !comp->can_compile_method(method) ||
1059 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1060 return NULL;
1061 }
1062
1063 #if INCLUDE_JVMCI
1064 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1065 return NULL;
1066 }
1067 #endif
1068
1069 if (osr_bci == InvocationEntryBci) {
1070 // standard compilation
1071 CompiledMethod* method_code = method->code();
1072 if (method_code != NULL && method_code->is_nmethod()) {
1073 if (compilation_is_complete(method, osr_bci, comp_level)) {
1074 return (nmethod*) method_code;
1075 }
1076 }
1077 if (method->is_not_compilable(comp_level)) {
1078 return NULL;
1079 }
1080 } else {
1081 // osr compilation
1082 #ifndef TIERED
1083 // seems like an assert of dubious value
1084 assert(comp_level == CompLevel_highest_tier,
1085 "all OSR compiles are assumed to be at a single compilation level");
1086 #endif // TIERED
1087 // We accept a higher level osr method
1088 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1089 if (nm != NULL) return nm;
1090 if (method->is_not_osr_compilable(comp_level)) return NULL;
1091 }
1092
1093 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1094 // some prerequisites that are compiler specific
1095 if (comp->is_c2() || comp->is_shark()) {
1096 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1097 // Resolve all classes seen in the signature of the method
1098 // we are compiling.
1099 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1100 }
1101
1102 // If the method is native, do the lookup in the thread requesting
1103 // the compilation. Native lookups can load code, which is not
1104 // permitted during compilation.
1105 //
1106 // Note: A native method implies non-osr compilation which is
1107 // checked with an assertion at the entry of this method.
1108 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1109 bool in_base_library;
1110 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1111 if (HAS_PENDING_EXCEPTION) {
1112 // In case of an exception looking up the method, we just forget
1113 // about it. The interpreter will kick-in and throw the exception.
1114 method->set_not_compilable(); // implies is_not_osr_compilable()
1115 CLEAR_PENDING_EXCEPTION;
1116 return NULL;
1117 }
1118 assert(method->has_native_function(), "must have native code by now");
1119 }
1120
1121 // RedefineClasses() has replaced this method; just return
1122 if (method->is_old()) {
1123 return NULL;
1124 }
1125
1126 // JVMTI -- post_compile_event requires jmethod_id() that may require
1127 // a lock the compiling thread can not acquire. Prefetch it here.
1128 if (JvmtiExport::should_post_compiled_method_load()) {
1129 method->jmethod_id();
1130 }
1131
1132 // do the compilation
1133 if (method->is_native()) {
1134 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1135 // The following native methods:
1136 //
1137 // java.lang.Float.intBitsToFloat
1138 // java.lang.Float.floatToRawIntBits
1139 // java.lang.Double.longBitsToDouble
1140 // java.lang.Double.doubleToRawLongBits
1141 //
1142 // are called through the interpreter even if interpreter native stubs
1143 // are not preferred (i.e., calling through adapter handlers is preferred).
1144 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1145 // if the version of the methods from the native libraries is called.
1146 // As the interpreter and the C2-intrinsified version of the methods preserves
1147 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1148 if ((UseSSE >= 1 &&
1149 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1150 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1151 (UseSSE >= 2 &&
1152 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1153 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1154 return NULL;
1155 }
1156
1157 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1158 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1159 //
1160 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1161 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1162 AdapterHandlerLibrary::create_native_wrapper(method);
1163 } else {
1164 return NULL;
1165 }
1166 } else {
1167 // If the compiler is shut off due to code cache getting full
1168 // fail out now so blocking compiles dont hang the java thread
1169 if (!should_compile_new_jobs()) {
1170 CompilationPolicy::policy()->delay_compilation(method());
1171 return NULL;
1172 }
1173 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1174 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1175 }
1176
1177 // return requested nmethod
1178 // We accept a higher level osr method
1179 if (osr_bci == InvocationEntryBci) {
1180 CompiledMethod* code = method->code();
1181 if (code == NULL) {
1182 return (nmethod*) code;
1183 } else {
1184 return code->as_nmethod_or_null();
1185 }
1186 }
1187 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1188 }
1189
1190
1191 // ------------------------------------------------------------------
1192 // CompileBroker::compilation_is_complete
1193 //
1194 // See if compilation of this method is already complete.
1195 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1196 int osr_bci,
1197 int comp_level) {
1198 bool is_osr = (osr_bci != standard_entry_bci);
1199 if (is_osr) {
1200 if (method->is_not_osr_compilable(comp_level)) {
1201 return true;
1202 } else {
1203 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1204 return (result != NULL);
1205 }
1206 } else {
1207 if (method->is_not_compilable(comp_level)) {
1208 return true;
1209 } else {
1210 CompiledMethod* result = method->code();
1211 if (result == NULL) return false;
1212 return comp_level == result->comp_level();
1213 }
1214 }
1215 }
1216
1217
1218 /**
1219 * See if this compilation is already requested.
1220 *
1221 * Implementation note: there is only a single "is in queue" bit
1222 * for each method. This means that the check below is overly
1223 * conservative in the sense that an osr compilation in the queue
1224 * will block a normal compilation from entering the queue (and vice
1225 * versa). This can be remedied by a full queue search to disambiguate
1226 * cases. If it is deemed profitable, this may be done.
1227 */
1228 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1229 return method->queued_for_compilation();
1230 }
1231
1232 // ------------------------------------------------------------------
1233 // CompileBroker::compilation_is_prohibited
1234 //
1235 // See if this compilation is not allowed.
1236 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1237 bool is_native = method->is_native();
1238 // Some compilers may not support the compilation of natives.
1239 AbstractCompiler *comp = compiler(comp_level);
1240 if (is_native &&
1241 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1242 method->set_not_compilable_quietly(comp_level);
1243 return true;
1244 }
1245
1246 bool is_osr = (osr_bci != standard_entry_bci);
1247 // Some compilers may not support on stack replacement.
1248 if (is_osr &&
1249 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1250 method->set_not_osr_compilable(comp_level);
1251 return true;
1252 }
1253
1254 // The method may be explicitly excluded by the user.
1255 double scale;
1256 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1257 bool quietly = CompilerOracle::should_exclude_quietly();
1258 if (PrintCompilation && !quietly) {
1259 // This does not happen quietly...
1260 ResourceMark rm;
1261 tty->print("### Excluding %s:%s",
1262 method->is_native() ? "generation of native wrapper" : "compile",
1263 (method->is_static() ? " static" : ""));
1264 method->print_short_name(tty);
1265 tty->cr();
1266 }
1267 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1268 }
1269
1270 return false;
1271 }
1272
1273 /**
1274 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1275 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1276 * The function also allows to generate separate compilation IDs for OSR compilations.
1277 */
1278 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1279 #ifdef ASSERT
1280 bool is_osr = (osr_bci != standard_entry_bci);
1281 int id;
1282 if (method->is_native()) {
1283 assert(!is_osr, "can't be osr");
1284 // Adapters, native wrappers and method handle intrinsics
1285 // should be generated always.
1286 return Atomic::add(1, &_compilation_id);
1287 } else if (CICountOSR && is_osr) {
1288 id = Atomic::add(1, &_osr_compilation_id);
1289 if (CIStartOSR <= id && id < CIStopOSR) {
1290 return id;
1291 }
1292 } else {
1293 id = Atomic::add(1, &_compilation_id);
1294 if (CIStart <= id && id < CIStop) {
1295 return id;
1296 }
1297 }
1298
1299 // Method was not in the appropriate compilation range.
1300 method->set_not_compilable_quietly();
1301 return 0;
1302 #else
1303 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1304 // only _compilation_id is incremented.
1305 return Atomic::add(1, &_compilation_id);
1306 #endif
1307 }
1308
1309 // ------------------------------------------------------------------
1310 // CompileBroker::assign_compile_id_unlocked
1311 //
1312 // Public wrapper for assign_compile_id that acquires the needed locks
1313 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1314 MutexLocker locker(MethodCompileQueue_lock, thread);
1315 return assign_compile_id(method, osr_bci);
1316 }
1317
1318 // ------------------------------------------------------------------
1319 // CompileBroker::preload_classes
1320 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1321 // Move this code over from c1_Compiler.cpp
1322 ShouldNotReachHere();
1323 }
1324
1325
1326 // ------------------------------------------------------------------
1327 // CompileBroker::create_compile_task
1328 //
1329 // Create a CompileTask object representing the current request for
1330 // compilation. Add this task to the queue.
1331 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1332 int compile_id,
1333 const methodHandle& method,
1334 int osr_bci,
1335 int comp_level,
1336 const methodHandle& hot_method,
1337 int hot_count,
1338 CompileTask::CompileReason compile_reason,
1339 bool blocking) {
1340 CompileTask* new_task = CompileTask::allocate();
1341 new_task->initialize(compile_id, method, osr_bci, comp_level,
1342 hot_method, hot_count, compile_reason,
1343 blocking);
1344 queue->add(new_task);
1345 return new_task;
1346 }
1347
1348 #if INCLUDE_JVMCI
1349 // The number of milliseconds to wait before checking if
1350 // JVMCI compilation has made progress.
1351 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1352
1353 // The number of JVMCI compilation progress checks that must fail
1354 // before unblocking a thread waiting for a blocking compilation.
1355 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1356
1357 /**
1358 * Waits for a JVMCI compiler to complete a given task. This thread
1359 * waits until either the task completes or it sees no JVMCI compilation
1360 * progress for N consecutive milliseconds where N is
1361 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1362 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1363 *
1364 * @return true if this thread needs to free/recycle the task
1365 */
1366 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1367 MutexLocker waiter(task->lock(), thread);
1368 int progress_wait_attempts = 0;
1369 int methods_compiled = jvmci->methods_compiled();
1370 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1371 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1372 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1373
1374 bool progress;
1375 if (jvmci_compiler_thread != NULL) {
1376 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1377 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1378 } else {
1379 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1380 // that all JVMCI compiler threads are blocked on. We use the counter for
1381 // successful JVMCI compilations to determine whether JVMCI compilation
1382 // is still making progress through the JVMCI compiler queue.
1383 progress = jvmci->methods_compiled() != methods_compiled;
1384 }
1385
1386 if (!progress) {
1387 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1388 if (PrintCompilation) {
1389 task->print(tty, "wait for blocking compilation timed out");
1390 }
1391 break;
1392 }
1393 } else {
1394 progress_wait_attempts = 0;
1395 if (jvmci_compiler_thread == NULL) {
1396 methods_compiled = jvmci->methods_compiled();
1397 }
1398 }
1399 }
1400 task->clear_waiter();
1401 return task->is_complete();
1402 }
1403 #endif
1404
1405 /**
1406 * Wait for the compilation task to complete.
1407 */
1408 void CompileBroker::wait_for_completion(CompileTask* task) {
1409 if (CIPrintCompileQueue) {
1410 ttyLocker ttyl;
1411 tty->print_cr("BLOCKING FOR COMPILE");
1412 }
1413
1414 assert(task->is_blocking(), "can only wait on blocking task");
1415
1416 JavaThread* thread = JavaThread::current();
1417 thread->set_blocked_on_compilation(true);
1418
1419 methodHandle method(thread, task->method());
1420 bool free_task;
1421 #if INCLUDE_JVMCI
1422 AbstractCompiler* comp = compiler(task->comp_level());
1423 if (comp->is_jvmci()) {
1424 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1425 } else
1426 #endif
1427 {
1428 MutexLocker waiter(task->lock(), thread);
1429 free_task = true;
1430 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1431 task->lock()->wait();
1432 }
1433 }
1434
1435 thread->set_blocked_on_compilation(false);
1436 if (free_task) {
1437 if (is_compilation_disabled_forever()) {
1438 CompileTask::free(task);
1439 return;
1440 }
1441
1442 // It is harmless to check this status without the lock, because
1443 // completion is a stable property (until the task object is recycled).
1444 assert(task->is_complete(), "Compilation should have completed");
1445 assert(task->code_handle() == NULL, "must be reset");
1446
1447 // By convention, the waiter is responsible for recycling a
1448 // blocking CompileTask. Since there is only one waiter ever
1449 // waiting on a CompileTask, we know that no one else will
1450 // be using this CompileTask; we can free it.
1451 CompileTask::free(task);
1452 }
1453 }
1454
1455 /**
1456 * Initialize compiler thread(s) + compiler object(s). The postcondition
1457 * of this function is that the compiler runtimes are initialized and that
1458 * compiler threads can start compiling.
1459 */
1460 bool CompileBroker::init_compiler_runtime() {
1461 CompilerThread* thread = CompilerThread::current();
1462 AbstractCompiler* comp = thread->compiler();
1463 // Final sanity check - the compiler object must exist
1464 guarantee(comp != NULL, "Compiler object must exist");
1465
1466 int system_dictionary_modification_counter;
1467 {
1468 MutexLocker locker(Compile_lock, thread);
1469 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1470 }
1471
1472 {
1473 // Must switch to native to allocate ci_env
1474 ThreadToNativeFromVM ttn(thread);
1475 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1476 // Cache Jvmti state
1477 ci_env.cache_jvmti_state();
1478 // Cache DTrace flags
1479 ci_env.cache_dtrace_flags();
1480
1481 // Switch back to VM state to do compiler initialization
1482 ThreadInVMfromNative tv(thread);
1483 ResetNoHandleMark rnhm;
1484
1485 if (!comp->is_shark()) {
1486 // Perform per-thread and global initializations
1487 comp->initialize();
1488 }
1489 }
1490
1491 if (comp->is_failed()) {
1492 disable_compilation_forever();
1493 // If compiler initialization failed, no compiler thread that is specific to a
1494 // particular compiler runtime will ever start to compile methods.
1495 shutdown_compiler_runtime(comp, thread);
1496 return false;
1497 }
1498
1499 // C1 specific check
1500 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1501 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1502 return false;
1503 }
1504
1505 return true;
1506 }
1507
1508 /**
1509 * If C1 and/or C2 initialization failed, we shut down all compilation.
1510 * We do this to keep things simple. This can be changed if it ever turns
1511 * out to be a problem.
1512 */
1513 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1514 // Free buffer blob, if allocated
1515 if (thread->get_buffer_blob() != NULL) {
1516 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1517 CodeCache::free(thread->get_buffer_blob());
1518 }
1519
1520 if (comp->should_perform_shutdown()) {
1521 // There are two reasons for shutting down the compiler
1522 // 1) compiler runtime initialization failed
1523 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1524 warning("%s initialization failed. Shutting down all compilers", comp->name());
1525
1526 // Only one thread per compiler runtime object enters here
1527 // Set state to shut down
1528 comp->set_shut_down();
1529
1530 // Delete all queued compilation tasks to make compiler threads exit faster.
1531 if (_c1_compile_queue != NULL) {
1532 _c1_compile_queue->free_all();
1533 }
1534
1535 if (_c2_compile_queue != NULL) {
1536 _c2_compile_queue->free_all();
1537 }
1538
1539 // Set flags so that we continue execution with using interpreter only.
1540 UseCompiler = false;
1541 UseInterpreter = true;
1542
1543 // We could delete compiler runtimes also. However, there are references to
1544 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1545 // fail. This can be done later if necessary.
1546 }
1547 }
1548
1549 // ------------------------------------------------------------------
1550 // CompileBroker::compiler_thread_loop
1551 //
1552 // The main loop run by a CompilerThread.
1553 void CompileBroker::compiler_thread_loop() {
1554 CompilerThread* thread = CompilerThread::current();
1555 CompileQueue* queue = thread->queue();
1556 // For the thread that initializes the ciObjectFactory
1557 // this resource mark holds all the shared objects
1558 ResourceMark rm;
1559
1560 // First thread to get here will initialize the compiler interface
1561
1562 if (!ciObjectFactory::is_initialized()) {
1563 ASSERT_IN_VM;
1564 MutexLocker only_one (CompileThread_lock, thread);
1565 if (!ciObjectFactory::is_initialized()) {
1566 ciObjectFactory::initialize();
1567 }
1568 }
1569
1570 // Open a log.
1571 if (LogCompilation) {
1572 init_compiler_thread_log();
1573 }
1574 CompileLog* log = thread->log();
1575 if (log != NULL) {
1576 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1577 thread->name(),
1578 os::current_thread_id(),
1579 os::current_process_id());
1580 log->stamp();
1581 log->end_elem();
1582 }
1583
1584 // If compiler thread/runtime initialization fails, exit the compiler thread
1585 if (!init_compiler_runtime()) {
1586 return;
1587 }
1588
1589 // Poll for new compilation tasks as long as the JVM runs. Compilation
1590 // should only be disabled if something went wrong while initializing the
1591 // compiler runtimes. This, in turn, should not happen. The only known case
1592 // when compiler runtime initialization fails is if there is not enough free
1593 // space in the code cache to generate the necessary stubs, etc.
1594 while (!is_compilation_disabled_forever()) {
1595 // We need this HandleMark to avoid leaking VM handles.
1596 HandleMark hm(thread);
1597
1598 CompileTask* task = queue->get();
1599 if (task == NULL) {
1600 continue;
1601 }
1602
1603 // Give compiler threads an extra quanta. They tend to be bursty and
1604 // this helps the compiler to finish up the job.
1605 if (CompilerThreadHintNoPreempt) {
1606 os::hint_no_preempt();
1607 }
1608
1609 // Assign the task to the current thread. Mark this compilation
1610 // thread as active for the profiler.
1611 CompileTaskWrapper ctw(task);
1612 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1613 task->set_code_handle(&result_handle);
1614 methodHandle method(thread, task->method());
1615
1616 // Never compile a method if breakpoints are present in it
1617 if (method()->number_of_breakpoints() == 0) {
1618 // Compile the method.
1619 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1620 invoke_compiler_on_method(task);
1621 } else {
1622 // After compilation is disabled, remove remaining methods from queue
1623 method->clear_queued_for_compilation();
1624 task->set_failure_reason("compilation is disabled");
1625 }
1626 }
1627 }
1628
1629 // Shut down compiler runtime
1630 shutdown_compiler_runtime(thread->compiler(), thread);
1631 }
1632
1633 // ------------------------------------------------------------------
1634 // CompileBroker::init_compiler_thread_log
1635 //
1636 // Set up state required by +LogCompilation.
1637 void CompileBroker::init_compiler_thread_log() {
1638 CompilerThread* thread = CompilerThread::current();
1639 char file_name[4*K];
1640 FILE* fp = NULL;
1641 intx thread_id = os::current_thread_id();
1642 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1643 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1644 if (dir == NULL) {
1645 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1646 thread_id, os::current_process_id());
1647 } else {
1648 jio_snprintf(file_name, sizeof(file_name),
1649 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1650 os::file_separator(), thread_id, os::current_process_id());
1651 }
1652
1653 fp = fopen(file_name, "wt");
1654 if (fp != NULL) {
1655 if (LogCompilation && Verbose) {
1656 tty->print_cr("Opening compilation log %s", file_name);
1657 }
1658 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1659 if (log == NULL) {
1660 fclose(fp);
1661 return;
1662 }
1663 thread->init_log(log);
1664
1665 if (xtty != NULL) {
1666 ttyLocker ttyl;
1667 // Record any per thread log files
1668 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1669 }
1670 return;
1671 }
1672 }
1673 warning("Cannot open log file: %s", file_name);
1674 }
1675
1676 void CompileBroker::log_metaspace_failure() {
1677 const char* message = "some methods may not be compiled because metaspace "
1678 "is out of memory";
1679 if (_compilation_log != NULL) {
1680 _compilation_log->log_metaspace_failure(message);
1681 }
1682 if (PrintCompilation) {
1683 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1684 }
1685 }
1686
1687
1688 // ------------------------------------------------------------------
1689 // CompileBroker::set_should_block
1690 //
1691 // Set _should_block.
1692 // Call this from the VM, with Threads_lock held and a safepoint requested.
1693 void CompileBroker::set_should_block() {
1694 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1695 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1696 #ifndef PRODUCT
1697 if (PrintCompilation && (Verbose || WizardMode))
1698 tty->print_cr("notifying compiler thread pool to block");
1699 #endif
1700 _should_block = true;
1701 }
1702
1703 // ------------------------------------------------------------------
1704 // CompileBroker::maybe_block
1705 //
1706 // Call this from the compiler at convenient points, to poll for _should_block.
1707 void CompileBroker::maybe_block() {
1708 if (_should_block) {
1709 #ifndef PRODUCT
1710 if (PrintCompilation && (Verbose || WizardMode))
1711 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1712 #endif
1713 ThreadInVMfromNative tivfn(JavaThread::current());
1714 }
1715 }
1716
1717 // wrapper for CodeCache::print_summary()
1718 static void codecache_print(bool detailed)
1719 {
1720 ResourceMark rm;
1721 stringStream s;
1722 // Dump code cache into a buffer before locking the tty,
1723 {
1724 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1725 CodeCache::print_summary(&s, detailed);
1726 }
1727 ttyLocker ttyl;
1728 tty->print("%s", s.as_string());
1729 }
1730
1731 // wrapper for CodeCache::print_summary() using outputStream
1732 static void codecache_print(outputStream* out, bool detailed) {
1733 ResourceMark rm;
1734 stringStream s;
1735
1736 // Dump code cache into a buffer
1737 {
1738 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1739 CodeCache::print_summary(&s, detailed);
1740 }
1741
1742 char* remaining_log = s.as_string();
1743 while (*remaining_log != '\0') {
1744 char* eol = strchr(remaining_log, '\n');
1745 if (eol == NULL) {
1746 out->print_cr("%s", remaining_log);
1747 remaining_log = remaining_log + strlen(remaining_log);
1748 } else {
1749 *eol = '\0';
1750 out->print_cr("%s", remaining_log);
1751 remaining_log = eol + 1;
1752 }
1753 }
1754 }
1755
1756 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1757
1758 if (success) {
1759 task->mark_success();
1760 if (ci_env != NULL) {
1761 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1762 }
1763 if (_compilation_log != NULL) {
1764 nmethod* code = task->code();
1765 if (code != NULL) {
1766 _compilation_log->log_nmethod(thread, code);
1767 }
1768 }
1769 }
1770
1771 // simulate crash during compilation
1772 assert(task->compile_id() != CICrashAt, "just as planned");
1773 if (event.should_commit()) {
1774 event.set_method(task->method());
1775 event.set_compileId(task->compile_id());
1776 event.set_compileLevel(task->comp_level());
1777 event.set_succeded(task->is_success());
1778 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1779 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1780 event.set_inlinedBytes(task->num_inlined_bytecodes());
1781 event.commit();
1782 }
1783 }
1784
1785 int DirectivesStack::_depth = 0;
1786 CompilerDirectives* DirectivesStack::_top = NULL;
1787 CompilerDirectives* DirectivesStack::_bottom = NULL;
1788
1789 // ------------------------------------------------------------------
1790 // CompileBroker::invoke_compiler_on_method
1791 //
1792 // Compile a method.
1793 //
1794 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1795 task->print_ul();
1796 if (PrintCompilation) {
1797 ResourceMark rm;
1798 task->print_tty();
1799 }
1800 elapsedTimer time;
1801
1802 CompilerThread* thread = CompilerThread::current();
1803 ResourceMark rm(thread);
1804
1805 if (LogEvents) {
1806 _compilation_log->log_compile(thread, task);
1807 }
1808
1809 // Common flags.
1810 uint compile_id = task->compile_id();
1811 int osr_bci = task->osr_bci();
1812 bool is_osr = (osr_bci != standard_entry_bci);
1813 bool should_log = (thread->log() != NULL);
1814 bool should_break = false;
1815 const int task_level = task->comp_level();
1816 AbstractCompiler* comp = task->compiler();
1817
1818 DirectiveSet* directive;
1819 {
1820 // create the handle inside it's own block so it can't
1821 // accidentally be referenced once the thread transitions to
1822 // native. The NoHandleMark before the transition should catch
1823 // any cases where this occurs in the future.
1824 methodHandle method(thread, task->method());
1825 assert(!method->is_native(), "no longer compile natives");
1826
1827 // Look up matching directives
1828 directive = DirectivesStack::getMatchingDirective(method, comp);
1829
1830 // Save information about this method in case of failure.
1831 set_last_compile(thread, method, is_osr, task_level);
1832
1833 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1834 }
1835
1836 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1837 if (should_log && !directive->LogOption) {
1838 should_log = false;
1839 }
1840
1841 // Allocate a new set of JNI handles.
1842 push_jni_handle_block();
1843 Method* target_handle = task->method();
1844 int compilable = ciEnv::MethodCompilable;
1845 const char* failure_reason = NULL;
1846 const char* retry_message = NULL;
1847
1848 int system_dictionary_modification_counter;
1849 {
1850 MutexLocker locker(Compile_lock, thread);
1851 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1852 }
1853
1854 #if INCLUDE_JVMCI
1855 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1856 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1857
1858 TraceTime t1("compilation", &time);
1859 EventCompilation event;
1860
1861 JVMCIEnv env(task, system_dictionary_modification_counter);
1862 methodHandle method(thread, target_handle);
1863 jvmci->compile_method(method, osr_bci, &env);
1864
1865 post_compile(thread, task, event, task->code() != NULL, NULL);
1866
1867 failure_reason = env.failure_reason();
1868 if (!env.retryable()) {
1869 retry_message = "not retryable";
1870 compilable = ciEnv::MethodCompilable_not_at_tier;
1871 }
1872
1873 } else
1874 #endif // INCLUDE_JVMCI
1875 {
1876 NoHandleMark nhm;
1877 ThreadToNativeFromVM ttn(thread);
1878
1879 ciEnv ci_env(task, system_dictionary_modification_counter);
1880 if (should_break) {
1881 ci_env.set_break_at_compile(true);
1882 }
1883 if (should_log) {
1884 ci_env.set_log(thread->log());
1885 }
1886 assert(thread->env() == &ci_env, "set by ci_env");
1887 // The thread-env() field is cleared in ~CompileTaskWrapper.
1888
1889 // Cache Jvmti state
1890 ci_env.cache_jvmti_state();
1891
1892 // Cache DTrace flags
1893 ci_env.cache_dtrace_flags();
1894
1895 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1896
1897 TraceTime t1("compilation", &time);
1898 EventCompilation event;
1899
1900 if (comp == NULL) {
1901 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1902 } else {
1903 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1904 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1905 while (WhiteBox::compilation_locked) {
1906 locker.wait(Mutex::_no_safepoint_check_flag);
1907 }
1908 }
1909 comp->compile_method(&ci_env, target, osr_bci, directive);
1910 }
1911
1912 if (!ci_env.failing() && task->code() == NULL) {
1913 //assert(false, "compiler should always document failure");
1914 // The compiler elected, without comment, not to register a result.
1915 // Do not attempt further compilations of this method.
1916 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1917 }
1918
1919 // Copy this bit to the enclosing block:
1920 compilable = ci_env.compilable();
1921
1922 if (ci_env.failing()) {
1923 failure_reason = ci_env.failure_reason();
1924 retry_message = ci_env.retry_message();
1925 ci_env.report_failure(failure_reason);
1926 }
1927
1928 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1929 }
1930 // Remove the JNI handle block after the ciEnv destructor has run in
1931 // the previous block.
1932 pop_jni_handle_block();
1933
1934 if (failure_reason != NULL) {
1935 task->set_failure_reason(failure_reason);
1936 if (_compilation_log != NULL) {
1937 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1938 }
1939 if (PrintCompilation) {
1940 FormatBufferResource msg = retry_message != NULL ?
1941 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1942 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1943 task->print(tty, msg);
1944 }
1945 }
1946
1947 methodHandle method(thread, task->method());
1948
1949 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1950
1951 collect_statistics(thread, time, task);
1952
1953 nmethod* nm = task->code();
1954 if (nm != NULL) {
1955 nm->maybe_print_nmethod(directive);
1956 }
1957 DirectivesStack::release(directive);
1958
1959 if (PrintCompilation && PrintCompilation2) {
1960 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1961 tty->print("%4d ", compile_id); // print compilation number
1962 tty->print("%s ", (is_osr ? "%" : " "));
1963 if (task->code() != NULL) {
1964 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1965 }
1966 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1967 }
1968
1969 Log(compilation, codecache) log;
1970 if (log.is_debug()) {
1971 LogStream ls(log.debug());
1972 codecache_print(&ls, /* detailed= */ false);
1973 }
1974 if (PrintCodeCacheOnCompilation) {
1975 codecache_print(/* detailed= */ false);
1976 }
1977 // Disable compilation, if required.
1978 switch (compilable) {
1979 case ciEnv::MethodCompilable_never:
1980 if (is_osr)
1981 method->set_not_osr_compilable_quietly();
1982 else
1983 method->set_not_compilable_quietly();
1984 break;
1985 case ciEnv::MethodCompilable_not_at_tier:
1986 if (is_osr)
1987 method->set_not_osr_compilable_quietly(task_level);
1988 else
1989 method->set_not_compilable_quietly(task_level);
1990 break;
1991 }
1992
1993 // Note that the queued_for_compilation bits are cleared without
1994 // protection of a mutex. [They were set by the requester thread,
1995 // when adding the task to the compile queue -- at which time the
1996 // compile queue lock was held. Subsequently, we acquired the compile
1997 // queue lock to get this task off the compile queue; thus (to belabour
1998 // the point somewhat) our clearing of the bits must be occurring
1999 // only after the setting of the bits. See also 14012000 above.
2000 method->clear_queued_for_compilation();
2001
2002 #ifdef ASSERT
2003 if (CollectedHeap::fired_fake_oom()) {
2004 // The current compile received a fake OOM during compilation so
2005 // go ahead and exit the VM since the test apparently succeeded
2006 tty->print_cr("*** Shutting down VM after successful fake OOM");
2007 vm_exit(0);
2008 }
2009 #endif
2010 }
2011
2012 /**
2013 * The CodeCache is full. Print warning and disable compilation.
2014 * Schedule code cache cleaning so compilation can continue later.
2015 * This function needs to be called only from CodeCache::allocate(),
2016 * since we currently handle a full code cache uniformly.
2017 */
2018 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2019 UseInterpreter = true;
2020 if (UseCompiler || AlwaysCompileLoopMethods ) {
2021 if (xtty != NULL) {
2022 ResourceMark rm;
2023 stringStream s;
2024 // Dump code cache state into a buffer before locking the tty,
2025 // because log_state() will use locks causing lock conflicts.
2026 CodeCache::log_state(&s);
2027 // Lock to prevent tearing
2028 ttyLocker ttyl;
2029 xtty->begin_elem("code_cache_full");
2030 xtty->print("%s", s.as_string());
2031 xtty->stamp();
2032 xtty->end_elem();
2033 }
2034
2035 #ifndef PRODUCT
2036 if (CompileTheWorld || ExitOnFullCodeCache) {
2037 codecache_print(/* detailed= */ true);
2038 before_exit(JavaThread::current());
2039 exit_globals(); // will delete tty
2040 vm_direct_exit(CompileTheWorld ? 0 : 1);
2041 }
2042 #endif
2043 if (UseCodeCacheFlushing) {
2044 // Since code cache is full, immediately stop new compiles
2045 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2046 NMethodSweeper::log_sweep("disable_compiler");
2047 }
2048 } else {
2049 disable_compilation_forever();
2050 }
2051
2052 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2053 }
2054 }
2055
2056 // ------------------------------------------------------------------
2057 // CompileBroker::set_last_compile
2058 //
2059 // Record this compilation for debugging purposes.
2060 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2061 ResourceMark rm;
2062 char* method_name = method->name()->as_C_string();
2063 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2064 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2065 char current_method[CompilerCounters::cmname_buffer_length];
2066 size_t maxLen = CompilerCounters::cmname_buffer_length;
2067
2068 if (UsePerfData) {
2069 const char* class_name = method->method_holder()->name()->as_C_string();
2070
2071 size_t s1len = strlen(class_name);
2072 size_t s2len = strlen(method_name);
2073
2074 // check if we need to truncate the string
2075 if (s1len + s2len + 2 > maxLen) {
2076
2077 // the strategy is to lop off the leading characters of the
2078 // class name and the trailing characters of the method name.
2079
2080 if (s2len + 2 > maxLen) {
2081 // lop of the entire class name string, let snprintf handle
2082 // truncation of the method name.
2083 class_name += s1len; // null string
2084 }
2085 else {
2086 // lop off the extra characters from the front of the class name
2087 class_name += ((s1len + s2len + 2) - maxLen);
2088 }
2089 }
2090
2091 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2092 }
2093
2094 if (CICountOSR && is_osr) {
2095 _last_compile_type = osr_compile;
2096 } else {
2097 _last_compile_type = normal_compile;
2098 }
2099 _last_compile_level = comp_level;
2100
2101 if (UsePerfData) {
2102 CompilerCounters* counters = thread->counters();
2103 counters->set_current_method(current_method);
2104 counters->set_compile_type((jlong)_last_compile_type);
2105 }
2106 }
2107
2108
2109 // ------------------------------------------------------------------
2110 // CompileBroker::push_jni_handle_block
2111 //
2112 // Push on a new block of JNI handles.
2113 void CompileBroker::push_jni_handle_block() {
2114 JavaThread* thread = JavaThread::current();
2115
2116 // Allocate a new block for JNI handles.
2117 // Inlined code from jni_PushLocalFrame()
2118 JNIHandleBlock* java_handles = thread->active_handles();
2119 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2120 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2121 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2122 thread->set_active_handles(compile_handles);
2123 }
2124
2125
2126 // ------------------------------------------------------------------
2127 // CompileBroker::pop_jni_handle_block
2128 //
2129 // Pop off the current block of JNI handles.
2130 void CompileBroker::pop_jni_handle_block() {
2131 JavaThread* thread = JavaThread::current();
2132
2133 // Release our JNI handle block
2134 JNIHandleBlock* compile_handles = thread->active_handles();
2135 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2136 thread->set_active_handles(java_handles);
2137 compile_handles->set_pop_frame_link(NULL);
2138 JNIHandleBlock::release_block(compile_handles, thread); // may block
2139 }
2140
2141 // ------------------------------------------------------------------
2142 // CompileBroker::collect_statistics
2143 //
2144 // Collect statistics about the compilation.
2145
2146 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2147 bool success = task->is_success();
2148 methodHandle method (thread, task->method());
2149 uint compile_id = task->compile_id();
2150 bool is_osr = (task->osr_bci() != standard_entry_bci);
2151 nmethod* code = task->code();
2152 CompilerCounters* counters = thread->counters();
2153
2154 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2155 MutexLocker locker(CompileStatistics_lock);
2156
2157 // _perf variables are production performance counters which are
2158 // updated regardless of the setting of the CITime and CITimeEach flags
2159 //
2160
2161 // account all time, including bailouts and failures in this counter;
2162 // C1 and C2 counters are counting both successful and unsuccessful compiles
2163 _t_total_compilation.add(time);
2164
2165 if (!success) {
2166 _total_bailout_count++;
2167 if (UsePerfData) {
2168 _perf_last_failed_method->set_value(counters->current_method());
2169 _perf_last_failed_type->set_value(counters->compile_type());
2170 _perf_total_bailout_count->inc();
2171 }
2172 _t_bailedout_compilation.add(time);
2173 } else if (code == NULL) {
2174 if (UsePerfData) {
2175 _perf_last_invalidated_method->set_value(counters->current_method());
2176 _perf_last_invalidated_type->set_value(counters->compile_type());
2177 _perf_total_invalidated_count->inc();
2178 }
2179 _total_invalidated_count++;
2180 _t_invalidated_compilation.add(time);
2181 } else {
2182 // Compilation succeeded
2183
2184 // update compilation ticks - used by the implementation of
2185 // java.lang.management.CompilationMBean
2186 _perf_total_compilation->inc(time.ticks());
2187 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2188
2189 if (CITime) {
2190 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2191 if (is_osr) {
2192 _t_osr_compilation.add(time);
2193 _sum_osr_bytes_compiled += bytes_compiled;
2194 } else {
2195 _t_standard_compilation.add(time);
2196 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2197 }
2198
2199 #if INCLUDE_JVMCI
2200 AbstractCompiler* comp = compiler(task->comp_level());
2201 if (comp) {
2202 CompilerStatistics* stats = comp->stats();
2203 if (stats) {
2204 if (is_osr) {
2205 stats->_osr.update(time, bytes_compiled);
2206 } else {
2207 stats->_standard.update(time, bytes_compiled);
2208 }
2209 stats->_nmethods_size += code->total_size();
2210 stats->_nmethods_code_size += code->insts_size();
2211 } else { // if (!stats)
2212 assert(false, "Compiler statistics object must exist");
2213 }
2214 } else { // if (!comp)
2215 assert(false, "Compiler object must exist");
2216 }
2217 #endif // INCLUDE_JVMCI
2218 }
2219
2220 if (UsePerfData) {
2221 // save the name of the last method compiled
2222 _perf_last_method->set_value(counters->current_method());
2223 _perf_last_compile_type->set_value(counters->compile_type());
2224 _perf_last_compile_size->set_value(method->code_size() +
2225 task->num_inlined_bytecodes());
2226 if (is_osr) {
2227 _perf_osr_compilation->inc(time.ticks());
2228 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2229 } else {
2230 _perf_standard_compilation->inc(time.ticks());
2231 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2232 }
2233 }
2234
2235 if (CITimeEach) {
2236 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2237 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2238 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2239 }
2240
2241 // Collect counts of successful compilations
2242 _sum_nmethod_size += code->total_size();
2243 _sum_nmethod_code_size += code->insts_size();
2244 _total_compile_count++;
2245
2246 if (UsePerfData) {
2247 _perf_sum_nmethod_size->inc( code->total_size());
2248 _perf_sum_nmethod_code_size->inc(code->insts_size());
2249 _perf_total_compile_count->inc();
2250 }
2251
2252 if (is_osr) {
2253 if (UsePerfData) _perf_total_osr_compile_count->inc();
2254 _total_osr_compile_count++;
2255 } else {
2256 if (UsePerfData) _perf_total_standard_compile_count->inc();
2257 _total_standard_compile_count++;
2258 }
2259 }
2260 // set the current method for the thread to null
2261 if (UsePerfData) counters->set_current_method("");
2262 }
2263
2264 const char* CompileBroker::compiler_name(int comp_level) {
2265 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2266 if (comp == NULL) {
2267 return "no compiler";
2268 } else {
2269 return (comp->name());
2270 }
2271 }
2272
2273 #if INCLUDE_JVMCI
2274 void CompileBroker::print_times(AbstractCompiler* comp) {
2275 CompilerStatistics* stats = comp->stats();
2276 if (stats) {
2277 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}",
2278 comp->name(), stats->bytes_per_second(),
2279 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2280 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2281 stats->_nmethods_size, stats->_nmethods_code_size);
2282 } else { // if (!stats)
2283 assert(false, "Compiler statistics object must exist");
2284 }
2285 comp->print_timers();
2286 }
2287 #endif // INCLUDE_JVMCI
2288
2289 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2290 #if INCLUDE_JVMCI
2291 elapsedTimer standard_compilation;
2292 elapsedTimer total_compilation;
2293 elapsedTimer osr_compilation;
2294
2295 int standard_bytes_compiled = 0;
2296 int osr_bytes_compiled = 0;
2297
2298 int standard_compile_count = 0;
2299 int osr_compile_count = 0;
2300 int total_compile_count = 0;
2301
2302 int nmethods_size = 0;
2303 int nmethods_code_size = 0;
2304 bool printedHeader = false;
2305
2306 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2307 AbstractCompiler* comp = _compilers[i];
2308 if (comp != NULL) {
2309 if (per_compiler && aggregate && !printedHeader) {
2310 printedHeader = true;
2311 tty->cr();
2312 tty->print_cr("Individual compiler times (for compiled methods only)");
2313 tty->print_cr("------------------------------------------------");
2314 tty->cr();
2315 }
2316 CompilerStatistics* stats = comp->stats();
2317
2318 if (stats) {
2319 standard_compilation.add(stats->_standard._time);
2320 osr_compilation.add(stats->_osr._time);
2321
2322 standard_bytes_compiled += stats->_standard._bytes;
2323 osr_bytes_compiled += stats->_osr._bytes;
2324
2325 standard_compile_count += stats->_standard._count;
2326 osr_compile_count += stats->_osr._count;
2327
2328 nmethods_size += stats->_nmethods_size;
2329 nmethods_code_size += stats->_nmethods_code_size;
2330 } else { // if (!stats)
2331 assert(false, "Compiler statistics object must exist");
2332 }
2333
2334 if (per_compiler) {
2335 print_times(comp);
2336 }
2337 }
2338 }
2339 total_compile_count = osr_compile_count + standard_compile_count;
2340 total_compilation.add(osr_compilation);
2341 total_compilation.add(standard_compilation);
2342
2343 // In hosted mode, print the JVMCI compiler specific counters manually.
2344 if (!UseJVMCICompiler) {
2345 JVMCICompiler::print_compilation_timers();
2346 }
2347 #else // INCLUDE_JVMCI
2348 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2349 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2350 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2351
2352 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2353 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2354
2355 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2356 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2357 int total_compile_count = CompileBroker::_total_compile_count;
2358
2359 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2360 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2361 #endif // INCLUDE_JVMCI
2362
2363 if (!aggregate) {
2364 return;
2365 }
2366 tty->cr();
2367 tty->print_cr("Accumulated compiler times");
2368 tty->print_cr("----------------------------------------------------------");
2369 //0000000000111111111122222222223333333333444444444455555555556666666666
2370 //0123456789012345678901234567890123456789012345678901234567890123456789
2371 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2372 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2373 standard_compilation.seconds(),
2374 standard_compilation.seconds() / standard_compile_count);
2375 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2376 CompileBroker::_t_bailedout_compilation.seconds(),
2377 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2378 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2379 osr_compilation.seconds(),
2380 osr_compilation.seconds() / osr_compile_count);
2381 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2382 CompileBroker::_t_invalidated_compilation.seconds(),
2383 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2384
2385 AbstractCompiler *comp = compiler(CompLevel_simple);
2386 if (comp != NULL) {
2387 tty->cr();
2388 comp->print_timers();
2389 }
2390 comp = compiler(CompLevel_full_optimization);
2391 if (comp != NULL) {
2392 tty->cr();
2393 comp->print_timers();
2394 }
2395 tty->cr();
2396 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2397 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2398 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2399 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2400 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2401 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2402 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2403 double tcs = total_compilation.seconds();
2404 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2405 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2406 tty->cr();
2407 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2408 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2409 }
2410
2411 // Debugging output for failure
2412 void CompileBroker::print_last_compile() {
2413 if (_last_compile_level != CompLevel_none &&
2414 compiler(_last_compile_level) != NULL &&
2415 _last_compile_type != no_compile) {
2416 if (_last_compile_type == osr_compile) {
2417 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2418 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2419 } else {
2420 tty->print_cr("Last parse: %d+++(%d) %s",
2421 _compilation_id, _last_compile_level, _last_method_compiled);
2422 }
2423 }
2424 }