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