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