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 #if INCLUDE_JVMCI
1041 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1042 return NULL;
1043 }
1044 #endif
1045
1046 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1047 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1048 DirectivesStack::release(directive);
1049 return nm;
1050 }
1051
1052 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1053 int comp_level,
1054 const methodHandle& hot_method, int hot_count,
1055 CompileTask::CompileReason compile_reason,
1056 DirectiveSet* directive,
1057 Thread* THREAD) {
1058
1059 // make sure arguments make sense
1060 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1061 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1062 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1063 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1064 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1065 // allow any levels for WhiteBox
1066 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1067 // return quickly if possible
1068
1069 // lock, make sure that the compilation
1070 // isn't prohibited in a straightforward way.
1071 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1072 if (!comp->can_compile_method(method) ||
1073 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1074 return NULL;
1075 }
1076
1077 if (osr_bci == InvocationEntryBci) {
1078 // standard compilation
1079 CompiledMethod* method_code = method->code();
1080 if (method_code != NULL && method_code->is_nmethod()) {
1081 if (compilation_is_complete(method, osr_bci, comp_level)) {
1082 return (nmethod*) method_code;
1083 }
1084 }
1085 if (method->is_not_compilable(comp_level)) {
1086 return NULL;
1087 }
1088 } else {
1089 // osr compilation
1090 #ifndef TIERED
1091 // seems like an assert of dubious value
1092 assert(comp_level == CompLevel_highest_tier,
1093 "all OSR compiles are assumed to be at a single compilation level");
1094 #endif // TIERED
1095 // We accept a higher level osr method
1096 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1097 if (nm != NULL) return nm;
1098 if (method->is_not_osr_compilable(comp_level)) return NULL;
1099 }
1100
1101 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1102 // some prerequisites that are compiler specific
1103 if (comp->is_c2() || comp->is_shark()) {
1104 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1105 // Resolve all classes seen in the signature of the method
1106 // we are compiling.
1107 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1108 }
1109
1110 // If the method is native, do the lookup in the thread requesting
1111 // the compilation. Native lookups can load code, which is not
1112 // permitted during compilation.
1113 //
1114 // Note: A native method implies non-osr compilation which is
1115 // checked with an assertion at the entry of this method.
1116 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1117 bool in_base_library;
1118 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1119 if (HAS_PENDING_EXCEPTION) {
1120 // In case of an exception looking up the method, we just forget
1121 // about it. The interpreter will kick-in and throw the exception.
1122 method->set_not_compilable(); // implies is_not_osr_compilable()
1123 CLEAR_PENDING_EXCEPTION;
1124 return NULL;
1125 }
1126 assert(method->has_native_function(), "must have native code by now");
1127 }
1128
1129 // RedefineClasses() has replaced this method; just return
1130 if (method->is_old()) {
1131 return NULL;
1132 }
1133
1134 // JVMTI -- post_compile_event requires jmethod_id() that may require
1135 // a lock the compiling thread can not acquire. Prefetch it here.
1136 if (JvmtiExport::should_post_compiled_method_load()) {
1137 method->jmethod_id();
1138 }
1139
1140 // do the compilation
1141 if (method->is_native()) {
1142 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1143 // The following native methods:
1144 //
1145 // java.lang.Float.intBitsToFloat
1146 // java.lang.Float.floatToRawIntBits
1147 // java.lang.Double.longBitsToDouble
1148 // java.lang.Double.doubleToRawLongBits
1149 //
1150 // are called through the interpreter even if interpreter native stubs
1151 // are not preferred (i.e., calling through adapter handlers is preferred).
1152 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1153 // if the version of the methods from the native libraries is called.
1154 // As the interpreter and the C2-intrinsified version of the methods preserves
1155 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1156 if ((UseSSE >= 1 &&
1157 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1158 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1159 (UseSSE >= 2 &&
1160 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1161 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1162 return NULL;
1163 }
1164
1165 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1166 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1167 //
1168 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1169 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1170 AdapterHandlerLibrary::create_native_wrapper(method);
1171 } else {
1172 return NULL;
1173 }
1174 } else {
1175 // If the compiler is shut off due to code cache getting full
1176 // fail out now so blocking compiles dont hang the java thread
1177 if (!should_compile_new_jobs()) {
1178 CompilationPolicy::policy()->delay_compilation(method());
1179 return NULL;
1180 }
1181 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1182 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1183 }
1184
1185 // return requested nmethod
1186 // We accept a higher level osr method
1187 if (osr_bci == InvocationEntryBci) {
1188 CompiledMethod* code = method->code();
1189 if (code == NULL) {
1190 return (nmethod*) code;
1191 } else {
1192 return code->as_nmethod_or_null();
1193 }
1194 }
1195 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1196 }
1197
1198
1199 // ------------------------------------------------------------------
1200 // CompileBroker::compilation_is_complete
1201 //
1202 // See if compilation of this method is already complete.
1203 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1204 int osr_bci,
1205 int comp_level) {
1206 bool is_osr = (osr_bci != standard_entry_bci);
1207 if (is_osr) {
1208 if (method->is_not_osr_compilable(comp_level)) {
1209 return true;
1210 } else {
1211 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1212 return (result != NULL);
1213 }
1214 } else {
1215 if (method->is_not_compilable(comp_level)) {
1216 return true;
1217 } else {
1218 CompiledMethod* result = method->code();
1219 if (result == NULL) return false;
1220 return comp_level == result->comp_level();
1221 }
1222 }
1223 }
1224
1225
1226 /**
1227 * See if this compilation is already requested.
1228 *
1229 * Implementation note: there is only a single "is in queue" bit
1230 * for each method. This means that the check below is overly
1231 * conservative in the sense that an osr compilation in the queue
1232 * will block a normal compilation from entering the queue (and vice
1233 * versa). This can be remedied by a full queue search to disambiguate
1234 * cases. If it is deemed profitable, this may be done.
1235 */
1236 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1237 return method->queued_for_compilation();
1238 }
1239
1240 // ------------------------------------------------------------------
1241 // CompileBroker::compilation_is_prohibited
1242 //
1243 // See if this compilation is not allowed.
1244 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1245 bool is_native = method->is_native();
1246 // Some compilers may not support the compilation of natives.
1247 AbstractCompiler *comp = compiler(comp_level);
1248 if (is_native &&
1249 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1250 method->set_not_compilable_quietly(comp_level);
1251 return true;
1252 }
1253
1254 bool is_osr = (osr_bci != standard_entry_bci);
1255 // Some compilers may not support on stack replacement.
1256 if (is_osr &&
1257 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1258 method->set_not_osr_compilable(comp_level);
1259 return true;
1260 }
1261
1262 // The method may be explicitly excluded by the user.
1263 double scale;
1264 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1265 bool quietly = CompilerOracle::should_exclude_quietly();
1266 if (PrintCompilation && !quietly) {
1267 // This does not happen quietly...
1268 ResourceMark rm;
1269 tty->print("### Excluding %s:%s",
1270 method->is_native() ? "generation of native wrapper" : "compile",
1271 (method->is_static() ? " static" : ""));
1272 method->print_short_name(tty);
1273 tty->cr();
1274 }
1275 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1276 }
1277
1278 return false;
1279 }
1280
1281 /**
1282 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1283 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1284 * The function also allows to generate separate compilation IDs for OSR compilations.
1285 */
1286 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1287 #ifdef ASSERT
1288 bool is_osr = (osr_bci != standard_entry_bci);
1289 int id;
1290 if (method->is_native()) {
1291 assert(!is_osr, "can't be osr");
1292 // Adapters, native wrappers and method handle intrinsics
1293 // should be generated always.
1294 return Atomic::add(1, &_compilation_id);
1295 } else if (CICountOSR && is_osr) {
1296 id = Atomic::add(1, &_osr_compilation_id);
1297 if (CIStartOSR <= id && id < CIStopOSR) {
1298 return id;
1299 }
1300 } else {
1301 id = Atomic::add(1, &_compilation_id);
1302 if (CIStart <= id && id < CIStop) {
1303 return id;
1304 }
1305 }
1306
1307 // Method was not in the appropriate compilation range.
1308 method->set_not_compilable_quietly();
1309 return 0;
1310 #else
1311 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1312 // only _compilation_id is incremented.
1313 return Atomic::add(1, &_compilation_id);
1314 #endif
1315 }
1316
1317 // ------------------------------------------------------------------
1318 // CompileBroker::assign_compile_id_unlocked
1319 //
1320 // Public wrapper for assign_compile_id that acquires the needed locks
1321 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1322 MutexLocker locker(MethodCompileQueue_lock, thread);
1323 return assign_compile_id(method, osr_bci);
1324 }
1325
1326 // ------------------------------------------------------------------
1327 // CompileBroker::preload_classes
1328 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1329 // Move this code over from c1_Compiler.cpp
1330 ShouldNotReachHere();
1331 }
1332
1333
1334 // ------------------------------------------------------------------
1335 // CompileBroker::create_compile_task
1336 //
1337 // Create a CompileTask object representing the current request for
1338 // compilation. Add this task to the queue.
1339 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1340 int compile_id,
1341 const methodHandle& method,
1342 int osr_bci,
1343 int comp_level,
1344 const methodHandle& hot_method,
1345 int hot_count,
1346 CompileTask::CompileReason compile_reason,
1347 bool blocking) {
1348 CompileTask* new_task = CompileTask::allocate();
1349 new_task->initialize(compile_id, method, osr_bci, comp_level,
1350 hot_method, hot_count, compile_reason,
1351 blocking);
1352 queue->add(new_task);
1353 return new_task;
1354 }
1355
1356 #if INCLUDE_JVMCI
1357 // The number of milliseconds to wait before checking if
1358 // JVMCI compilation has made progress.
1359 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1360
1361 // The number of JVMCI compilation progress checks that must fail
1362 // before unblocking a thread waiting for a blocking compilation.
1363 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1364
1365 /**
1366 * Waits for a JVMCI compiler to complete a given task. This thread
1367 * waits until either the task completes or it sees no JVMCI compilation
1368 * progress for N consecutive milliseconds where N is
1369 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1370 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1371 *
1372 * @return true if this thread needs to free/recycle the task
1373 */
1374 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1375 MutexLocker waiter(task->lock(), thread);
1376 int progress_wait_attempts = 0;
1377 int methods_compiled = jvmci->methods_compiled();
1378 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1379 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1380 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1381
1382 bool progress;
1383 if (jvmci_compiler_thread != NULL) {
1384 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1385 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1386 } else {
1387 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1388 // that all JVMCI compiler threads are blocked on. We use the counter for
1389 // successful JVMCI compilations to determine whether JVMCI compilation
1390 // is still making progress through the JVMCI compiler queue.
1391 progress = jvmci->methods_compiled() != methods_compiled;
1392 }
1393
1394 if (!progress) {
1395 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1396 if (PrintCompilation) {
1397 task->print(tty, "wait for blocking compilation timed out");
1398 }
1399 break;
1400 }
1401 } else {
1402 progress_wait_attempts = 0;
1403 if (jvmci_compiler_thread == NULL) {
1404 methods_compiled = jvmci->methods_compiled();
1405 }
1406 }
1407 }
1408 task->clear_waiter();
1409 return task->is_complete();
1410 }
1411 #endif
1412
1413 /**
1414 * Wait for the compilation task to complete.
1415 */
1416 void CompileBroker::wait_for_completion(CompileTask* task) {
1417 if (CIPrintCompileQueue) {
1418 ttyLocker ttyl;
1419 tty->print_cr("BLOCKING FOR COMPILE");
1420 }
1421
1422 assert(task->is_blocking(), "can only wait on blocking task");
1423
1424 JavaThread* thread = JavaThread::current();
1425 thread->set_blocked_on_compilation(true);
1426
1427 methodHandle method(thread, task->method());
1428 bool free_task;
1429 #if INCLUDE_JVMCI
1430 AbstractCompiler* comp = compiler(task->comp_level());
1431 if (comp->is_jvmci()) {
1432 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1433 } else
1434 #endif
1435 {
1436 MutexLocker waiter(task->lock(), thread);
1437 free_task = true;
1438 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1439 task->lock()->wait();
1440 }
1441 }
1442
1443 thread->set_blocked_on_compilation(false);
1444 if (free_task) {
1445 if (is_compilation_disabled_forever()) {
1446 CompileTask::free(task);
1447 return;
1448 }
1449
1450 // It is harmless to check this status without the lock, because
1451 // completion is a stable property (until the task object is recycled).
1452 assert(task->is_complete(), "Compilation should have completed");
1453 assert(task->code_handle() == NULL, "must be reset");
1454
1455 // By convention, the waiter is responsible for recycling a
1456 // blocking CompileTask. Since there is only one waiter ever
1457 // waiting on a CompileTask, we know that no one else will
1458 // be using this CompileTask; we can free it.
1459 CompileTask::free(task);
1460 }
1461 }
1462
1463 /**
1464 * Initialize compiler thread(s) + compiler object(s). The postcondition
1465 * of this function is that the compiler runtimes are initialized and that
1466 * compiler threads can start compiling.
1467 */
1468 bool CompileBroker::init_compiler_runtime() {
1469 CompilerThread* thread = CompilerThread::current();
1470 AbstractCompiler* comp = thread->compiler();
1471 // Final sanity check - the compiler object must exist
1472 guarantee(comp != NULL, "Compiler object must exist");
1473
1474 int system_dictionary_modification_counter;
1475 {
1476 MutexLocker locker(Compile_lock, thread);
1477 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1478 }
1479
1480 {
1481 // Must switch to native to allocate ci_env
1482 ThreadToNativeFromVM ttn(thread);
1483 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1484 // Cache Jvmti state
1485 ci_env.cache_jvmti_state();
1486 // Cache DTrace flags
1487 ci_env.cache_dtrace_flags();
1488
1489 // Switch back to VM state to do compiler initialization
1490 ThreadInVMfromNative tv(thread);
1491 ResetNoHandleMark rnhm;
1492
1493 if (!comp->is_shark()) {
1494 // Perform per-thread and global initializations
1495 comp->initialize();
1496 }
1497 }
1498
1499 if (comp->is_failed()) {
1500 disable_compilation_forever();
1501 // If compiler initialization failed, no compiler thread that is specific to a
1502 // particular compiler runtime will ever start to compile methods.
1503 shutdown_compiler_runtime(comp, thread);
1504 return false;
1505 }
1506
1507 // C1 specific check
1508 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1509 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1510 return false;
1511 }
1512
1513 return true;
1514 }
1515
1516 /**
1517 * If C1 and/or C2 initialization failed, we shut down all compilation.
1518 * We do this to keep things simple. This can be changed if it ever turns
1519 * out to be a problem.
1520 */
1521 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1522 // Free buffer blob, if allocated
1523 if (thread->get_buffer_blob() != NULL) {
1524 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1525 CodeCache::free(thread->get_buffer_blob());
1526 }
1527
1528 if (comp->should_perform_shutdown()) {
1529 // There are two reasons for shutting down the compiler
1530 // 1) compiler runtime initialization failed
1531 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1532 warning("%s initialization failed. Shutting down all compilers", comp->name());
1533
1534 // Only one thread per compiler runtime object enters here
1535 // Set state to shut down
1536 comp->set_shut_down();
1537
1538 // Delete all queued compilation tasks to make compiler threads exit faster.
1539 if (_c1_compile_queue != NULL) {
1540 _c1_compile_queue->free_all();
1541 }
1542
1543 if (_c2_compile_queue != NULL) {
1544 _c2_compile_queue->free_all();
1545 }
1546
1547 // Set flags so that we continue execution with using interpreter only.
1548 UseCompiler = false;
1549 UseInterpreter = true;
1550
1551 // We could delete compiler runtimes also. However, there are references to
1552 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1553 // fail. This can be done later if necessary.
1554 }
1555 }
1556
1557 // ------------------------------------------------------------------
1558 // CompileBroker::compiler_thread_loop
1559 //
1560 // The main loop run by a CompilerThread.
1561 void CompileBroker::compiler_thread_loop() {
1562 CompilerThread* thread = CompilerThread::current();
1563 CompileQueue* queue = thread->queue();
1564 // For the thread that initializes the ciObjectFactory
1565 // this resource mark holds all the shared objects
1566 ResourceMark rm;
1567
1568 // First thread to get here will initialize the compiler interface
1569
1570 if (!ciObjectFactory::is_initialized()) {
1571 ASSERT_IN_VM;
1572 MutexLocker only_one (CompileThread_lock, thread);
1573 if (!ciObjectFactory::is_initialized()) {
1574 ciObjectFactory::initialize();
1575 }
1576 }
1577
1578 // Open a log.
1579 if (LogCompilation) {
1580 init_compiler_thread_log();
1581 }
1582 CompileLog* log = thread->log();
1583 if (log != NULL) {
1584 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1585 thread->name(),
1586 os::current_thread_id(),
1587 os::current_process_id());
1588 log->stamp();
1589 log->end_elem();
1590 }
1591
1592 // If compiler thread/runtime initialization fails, exit the compiler thread
1593 if (!init_compiler_runtime()) {
1594 return;
1595 }
1596
1597 // Poll for new compilation tasks as long as the JVM runs. Compilation
1598 // should only be disabled if something went wrong while initializing the
1599 // compiler runtimes. This, in turn, should not happen. The only known case
1600 // when compiler runtime initialization fails is if there is not enough free
1601 // space in the code cache to generate the necessary stubs, etc.
1602 while (!is_compilation_disabled_forever()) {
1603 // We need this HandleMark to avoid leaking VM handles.
1604 HandleMark hm(thread);
1605
1606 CompileTask* task = queue->get();
1607 if (task == NULL) {
1608 continue;
1609 }
1610
1611 // Give compiler threads an extra quanta. They tend to be bursty and
1612 // this helps the compiler to finish up the job.
1613 if (CompilerThreadHintNoPreempt) {
1614 os::hint_no_preempt();
1615 }
1616
1617 // Assign the task to the current thread. Mark this compilation
1618 // thread as active for the profiler.
1619 CompileTaskWrapper ctw(task);
1620 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1621 task->set_code_handle(&result_handle);
1622 methodHandle method(thread, task->method());
1623
1624 // Never compile a method if breakpoints are present in it
1625 if (method()->number_of_breakpoints() == 0) {
1626 // Compile the method.
1627 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1628 invoke_compiler_on_method(task);
1629 } else {
1630 // After compilation is disabled, remove remaining methods from queue
1631 method->clear_queued_for_compilation();
1632 task->set_failure_reason("compilation is disabled");
1633 }
1634 }
1635 }
1636
1637 // Shut down compiler runtime
1638 shutdown_compiler_runtime(thread->compiler(), thread);
1639 }
1640
1641 // ------------------------------------------------------------------
1642 // CompileBroker::init_compiler_thread_log
1643 //
1644 // Set up state required by +LogCompilation.
1645 void CompileBroker::init_compiler_thread_log() {
1646 CompilerThread* thread = CompilerThread::current();
1647 char file_name[4*K];
1648 FILE* fp = NULL;
1649 intx thread_id = os::current_thread_id();
1650 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1651 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1652 if (dir == NULL) {
1653 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1654 thread_id, os::current_process_id());
1655 } else {
1656 jio_snprintf(file_name, sizeof(file_name),
1657 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1658 os::file_separator(), thread_id, os::current_process_id());
1659 }
1660
1661 fp = fopen(file_name, "wt");
1662 if (fp != NULL) {
1663 if (LogCompilation && Verbose) {
1664 tty->print_cr("Opening compilation log %s", file_name);
1665 }
1666 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1667 if (log == NULL) {
1668 fclose(fp);
1669 return;
1670 }
1671 thread->init_log(log);
1672
1673 if (xtty != NULL) {
1674 ttyLocker ttyl;
1675 // Record any per thread log files
1676 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1677 }
1678 return;
1679 }
1680 }
1681 warning("Cannot open log file: %s", file_name);
1682 }
1683
1684 void CompileBroker::log_metaspace_failure() {
1685 const char* message = "some methods may not be compiled because metaspace "
1686 "is out of memory";
1687 if (_compilation_log != NULL) {
1688 _compilation_log->log_metaspace_failure(message);
1689 }
1690 if (PrintCompilation) {
1691 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1692 }
1693 }
1694
1695
1696 // ------------------------------------------------------------------
1697 // CompileBroker::set_should_block
1698 //
1699 // Set _should_block.
1700 // Call this from the VM, with Threads_lock held and a safepoint requested.
1701 void CompileBroker::set_should_block() {
1702 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1703 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1704 #ifndef PRODUCT
1705 if (PrintCompilation && (Verbose || WizardMode))
1706 tty->print_cr("notifying compiler thread pool to block");
1707 #endif
1708 _should_block = true;
1709 }
1710
1711 // ------------------------------------------------------------------
1712 // CompileBroker::maybe_block
1713 //
1714 // Call this from the compiler at convenient points, to poll for _should_block.
1715 void CompileBroker::maybe_block() {
1716 if (_should_block) {
1717 #ifndef PRODUCT
1718 if (PrintCompilation && (Verbose || WizardMode))
1719 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1720 #endif
1721 ThreadInVMfromNative tivfn(JavaThread::current());
1722 }
1723 }
1724
1725 // wrapper for CodeCache::print_summary()
1726 static void codecache_print(bool detailed)
1727 {
1728 ResourceMark rm;
1729 stringStream s;
1730 // Dump code cache into a buffer before locking the tty,
1731 {
1732 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1733 CodeCache::print_summary(&s, detailed);
1734 }
1735 ttyLocker ttyl;
1736 tty->print("%s", s.as_string());
1737 }
1738
1739 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1740
1741 if (success) {
1742 task->mark_success();
1743 if (ci_env != NULL) {
1744 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1745 }
1746 if (_compilation_log != NULL) {
1747 nmethod* code = task->code();
1748 if (code != NULL) {
1749 _compilation_log->log_nmethod(thread, code);
1750 }
1751 }
1752 }
1753
1754 // simulate crash during compilation
1755 assert(task->compile_id() != CICrashAt, "just as planned");
1756 if (event.should_commit()) {
1757 event.set_method(task->method());
1758 event.set_compileID(task->compile_id());
1759 event.set_compileLevel(task->comp_level());
1760 event.set_succeded(task->is_success());
1761 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1762 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1763 event.set_inlinedBytes(task->num_inlined_bytecodes());
1764 event.commit();
1765 }
1766 }
1767
1768 int DirectivesStack::_depth = 0;
1769 CompilerDirectives* DirectivesStack::_top = NULL;
1770 CompilerDirectives* DirectivesStack::_bottom = NULL;
1771
1772 // ------------------------------------------------------------------
1773 // CompileBroker::invoke_compiler_on_method
1774 //
1775 // Compile a method.
1776 //
1777 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1778 if (PrintCompilation) {
1779 ResourceMark rm;
1780 task->print_tty();
1781 }
1782 elapsedTimer time;
1783
1784 CompilerThread* thread = CompilerThread::current();
1785 ResourceMark rm(thread);
1786
1787 if (LogEvents) {
1788 _compilation_log->log_compile(thread, task);
1789 }
1790
1791 // Common flags.
1792 uint compile_id = task->compile_id();
1793 int osr_bci = task->osr_bci();
1794 bool is_osr = (osr_bci != standard_entry_bci);
1795 bool should_log = (thread->log() != NULL);
1796 bool should_break = false;
1797 const int task_level = task->comp_level();
1798 AbstractCompiler* comp = task->compiler();
1799
1800 DirectiveSet* directive;
1801 {
1802 // create the handle inside it's own block so it can't
1803 // accidentally be referenced once the thread transitions to
1804 // native. The NoHandleMark before the transition should catch
1805 // any cases where this occurs in the future.
1806 methodHandle method(thread, task->method());
1807 assert(!method->is_native(), "no longer compile natives");
1808
1809 // Look up matching directives
1810 directive = DirectivesStack::getMatchingDirective(method, comp);
1811
1812 // Save information about this method in case of failure.
1813 set_last_compile(thread, method, is_osr, task_level);
1814
1815 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1816 }
1817
1818 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1819 if (should_log && !directive->LogOption) {
1820 should_log = false;
1821 }
1822
1823 // Allocate a new set of JNI handles.
1824 push_jni_handle_block();
1825 Method* target_handle = task->method();
1826 int compilable = ciEnv::MethodCompilable;
1827 const char* failure_reason = NULL;
1828 const char* retry_message = NULL;
1829
1830 int system_dictionary_modification_counter;
1831 {
1832 MutexLocker locker(Compile_lock, thread);
1833 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1834 }
1835
1836 #if INCLUDE_JVMCI
1837 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1838 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1839
1840 TraceTime t1("compilation", &time);
1841 EventCompilation event;
1842
1843 JVMCIEnv env(task, system_dictionary_modification_counter);
1844 methodHandle method(thread, target_handle);
1845 jvmci->compile_method(method, osr_bci, &env);
1846
1847 post_compile(thread, task, event, task->code() != NULL, NULL);
1848
1849 failure_reason = env.failure_reason();
1850 if (!env.retryable()) {
1851 retry_message = "not retryable";
1852 compilable = ciEnv::MethodCompilable_not_at_tier;
1853 }
1854
1855 } else
1856 #endif // INCLUDE_JVMCI
1857 {
1858 NoHandleMark nhm;
1859 ThreadToNativeFromVM ttn(thread);
1860
1861 ciEnv ci_env(task, system_dictionary_modification_counter);
1862 if (should_break) {
1863 ci_env.set_break_at_compile(true);
1864 }
1865 if (should_log) {
1866 ci_env.set_log(thread->log());
1867 }
1868 assert(thread->env() == &ci_env, "set by ci_env");
1869 // The thread-env() field is cleared in ~CompileTaskWrapper.
1870
1871 // Cache Jvmti state
1872 ci_env.cache_jvmti_state();
1873
1874 // Cache DTrace flags
1875 ci_env.cache_dtrace_flags();
1876
1877 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1878
1879 TraceTime t1("compilation", &time);
1880 EventCompilation event;
1881
1882 if (comp == NULL) {
1883 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1884 } else {
1885 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1886 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1887 while (WhiteBox::compilation_locked) {
1888 locker.wait(Mutex::_no_safepoint_check_flag);
1889 }
1890 }
1891 comp->compile_method(&ci_env, target, osr_bci, directive);
1892 }
1893
1894 if (!ci_env.failing() && task->code() == NULL) {
1895 //assert(false, "compiler should always document failure");
1896 // The compiler elected, without comment, not to register a result.
1897 // Do not attempt further compilations of this method.
1898 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1899 }
1900
1901 // Copy this bit to the enclosing block:
1902 compilable = ci_env.compilable();
1903
1904 if (ci_env.failing()) {
1905 failure_reason = ci_env.failure_reason();
1906 retry_message = ci_env.retry_message();
1907 ci_env.report_failure(failure_reason);
1908 }
1909
1910 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1911 }
1912 // Remove the JNI handle block after the ciEnv destructor has run in
1913 // the previous block.
1914 pop_jni_handle_block();
1915
1916 if (failure_reason != NULL) {
1917 task->set_failure_reason(failure_reason);
1918 if (_compilation_log != NULL) {
1919 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1920 }
1921 if (PrintCompilation) {
1922 FormatBufferResource msg = retry_message != NULL ?
1923 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1924 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1925 task->print(tty, msg);
1926 }
1927 }
1928
1929 methodHandle method(thread, task->method());
1930
1931 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1932
1933 collect_statistics(thread, time, task);
1934
1935 nmethod* nm = task->code();
1936 if (nm != NULL) {
1937 nm->maybe_print_nmethod(directive);
1938 }
1939 DirectivesStack::release(directive);
1940
1941 if (PrintCompilation && PrintCompilation2) {
1942 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1943 tty->print("%4d ", compile_id); // print compilation number
1944 tty->print("%s ", (is_osr ? "%" : " "));
1945 if (task->code() != NULL) {
1946 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1947 }
1948 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1949 }
1950
1951 if (PrintCodeCacheOnCompilation)
1952 codecache_print(/* detailed= */ false);
1953
1954 // Disable compilation, if required.
1955 switch (compilable) {
1956 case ciEnv::MethodCompilable_never:
1957 if (is_osr)
1958 method->set_not_osr_compilable_quietly();
1959 else
1960 method->set_not_compilable_quietly();
1961 break;
1962 case ciEnv::MethodCompilable_not_at_tier:
1963 if (is_osr)
1964 method->set_not_osr_compilable_quietly(task_level);
1965 else
1966 method->set_not_compilable_quietly(task_level);
1967 break;
1968 }
1969
1970 // Note that the queued_for_compilation bits are cleared without
1971 // protection of a mutex. [They were set by the requester thread,
1972 // when adding the task to the compile queue -- at which time the
1973 // compile queue lock was held. Subsequently, we acquired the compile
1974 // queue lock to get this task off the compile queue; thus (to belabour
1975 // the point somewhat) our clearing of the bits must be occurring
1976 // only after the setting of the bits. See also 14012000 above.
1977 method->clear_queued_for_compilation();
1978
1979 #ifdef ASSERT
1980 if (CollectedHeap::fired_fake_oom()) {
1981 // The current compile received a fake OOM during compilation so
1982 // go ahead and exit the VM since the test apparently succeeded
1983 tty->print_cr("*** Shutting down VM after successful fake OOM");
1984 vm_exit(0);
1985 }
1986 #endif
1987 }
1988
1989 /**
1990 * The CodeCache is full. Print warning and disable compilation.
1991 * Schedule code cache cleaning so compilation can continue later.
1992 * This function needs to be called only from CodeCache::allocate(),
1993 * since we currently handle a full code cache uniformly.
1994 */
1995 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1996 UseInterpreter = true;
1997 if (UseCompiler || AlwaysCompileLoopMethods ) {
1998 if (xtty != NULL) {
1999 ResourceMark rm;
2000 stringStream s;
2001 // Dump code cache state into a buffer before locking the tty,
2002 // because log_state() will use locks causing lock conflicts.
2003 CodeCache::log_state(&s);
2004 // Lock to prevent tearing
2005 ttyLocker ttyl;
2006 xtty->begin_elem("code_cache_full");
2007 xtty->print("%s", s.as_string());
2008 xtty->stamp();
2009 xtty->end_elem();
2010 }
2011
2012 #ifndef PRODUCT
2013 if (CompileTheWorld || ExitOnFullCodeCache) {
2014 codecache_print(/* detailed= */ true);
2015 before_exit(JavaThread::current());
2016 exit_globals(); // will delete tty
2017 vm_direct_exit(CompileTheWorld ? 0 : 1);
2018 }
2019 #endif
2020 if (UseCodeCacheFlushing) {
2021 // Since code cache is full, immediately stop new compiles
2022 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2023 NMethodSweeper::log_sweep("disable_compiler");
2024 }
2025 } else {
2026 disable_compilation_forever();
2027 }
2028
2029 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2030 }
2031 }
2032
2033 // ------------------------------------------------------------------
2034 // CompileBroker::set_last_compile
2035 //
2036 // Record this compilation for debugging purposes.
2037 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2038 ResourceMark rm;
2039 char* method_name = method->name()->as_C_string();
2040 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2041 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2042 char current_method[CompilerCounters::cmname_buffer_length];
2043 size_t maxLen = CompilerCounters::cmname_buffer_length;
2044
2045 if (UsePerfData) {
2046 const char* class_name = method->method_holder()->name()->as_C_string();
2047
2048 size_t s1len = strlen(class_name);
2049 size_t s2len = strlen(method_name);
2050
2051 // check if we need to truncate the string
2052 if (s1len + s2len + 2 > maxLen) {
2053
2054 // the strategy is to lop off the leading characters of the
2055 // class name and the trailing characters of the method name.
2056
2057 if (s2len + 2 > maxLen) {
2058 // lop of the entire class name string, let snprintf handle
2059 // truncation of the method name.
2060 class_name += s1len; // null string
2061 }
2062 else {
2063 // lop off the extra characters from the front of the class name
2064 class_name += ((s1len + s2len + 2) - maxLen);
2065 }
2066 }
2067
2068 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2069 }
2070
2071 if (CICountOSR && is_osr) {
2072 _last_compile_type = osr_compile;
2073 } else {
2074 _last_compile_type = normal_compile;
2075 }
2076 _last_compile_level = comp_level;
2077
2078 if (UsePerfData) {
2079 CompilerCounters* counters = thread->counters();
2080 counters->set_current_method(current_method);
2081 counters->set_compile_type((jlong)_last_compile_type);
2082 }
2083 }
2084
2085
2086 // ------------------------------------------------------------------
2087 // CompileBroker::push_jni_handle_block
2088 //
2089 // Push on a new block of JNI handles.
2090 void CompileBroker::push_jni_handle_block() {
2091 JavaThread* thread = JavaThread::current();
2092
2093 // Allocate a new block for JNI handles.
2094 // Inlined code from jni_PushLocalFrame()
2095 JNIHandleBlock* java_handles = thread->active_handles();
2096 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2097 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2098 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2099 thread->set_active_handles(compile_handles);
2100 }
2101
2102
2103 // ------------------------------------------------------------------
2104 // CompileBroker::pop_jni_handle_block
2105 //
2106 // Pop off the current block of JNI handles.
2107 void CompileBroker::pop_jni_handle_block() {
2108 JavaThread* thread = JavaThread::current();
2109
2110 // Release our JNI handle block
2111 JNIHandleBlock* compile_handles = thread->active_handles();
2112 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2113 thread->set_active_handles(java_handles);
2114 compile_handles->set_pop_frame_link(NULL);
2115 JNIHandleBlock::release_block(compile_handles, thread); // may block
2116 }
2117
2118 // ------------------------------------------------------------------
2119 // CompileBroker::collect_statistics
2120 //
2121 // Collect statistics about the compilation.
2122
2123 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2124 bool success = task->is_success();
2125 methodHandle method (thread, task->method());
2126 uint compile_id = task->compile_id();
2127 bool is_osr = (task->osr_bci() != standard_entry_bci);
2128 nmethod* code = task->code();
2129 CompilerCounters* counters = thread->counters();
2130
2131 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2132 MutexLocker locker(CompileStatistics_lock);
2133
2134 // _perf variables are production performance counters which are
2135 // updated regardless of the setting of the CITime and CITimeEach flags
2136 //
2137
2138 // account all time, including bailouts and failures in this counter;
2139 // C1 and C2 counters are counting both successful and unsuccessful compiles
2140 _t_total_compilation.add(time);
2141
2142 if (!success) {
2143 _total_bailout_count++;
2144 if (UsePerfData) {
2145 _perf_last_failed_method->set_value(counters->current_method());
2146 _perf_last_failed_type->set_value(counters->compile_type());
2147 _perf_total_bailout_count->inc();
2148 }
2149 _t_bailedout_compilation.add(time);
2150 } else if (code == NULL) {
2151 if (UsePerfData) {
2152 _perf_last_invalidated_method->set_value(counters->current_method());
2153 _perf_last_invalidated_type->set_value(counters->compile_type());
2154 _perf_total_invalidated_count->inc();
2155 }
2156 _total_invalidated_count++;
2157 _t_invalidated_compilation.add(time);
2158 } else {
2159 // Compilation succeeded
2160
2161 // update compilation ticks - used by the implementation of
2162 // java.lang.management.CompilationMBean
2163 _perf_total_compilation->inc(time.ticks());
2164 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2165
2166 if (CITime) {
2167 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2168 if (is_osr) {
2169 _t_osr_compilation.add(time);
2170 _sum_osr_bytes_compiled += bytes_compiled;
2171 } else {
2172 _t_standard_compilation.add(time);
2173 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2174 }
2175
2176 #if INCLUDE_JVMCI
2177 AbstractCompiler* comp = compiler(task->comp_level());
2178 if (comp) {
2179 CompilerStatistics* stats = comp->stats();
2180 if (stats) {
2181 if (is_osr) {
2182 stats->_osr.update(time, bytes_compiled);
2183 } else {
2184 stats->_standard.update(time, bytes_compiled);
2185 }
2186 stats->_nmethods_size += code->total_size();
2187 stats->_nmethods_code_size += code->insts_size();
2188 } else { // if (!stats)
2189 assert(false, "Compiler statistics object must exist");
2190 }
2191 } else { // if (!comp)
2192 assert(false, "Compiler object must exist");
2193 }
2194 #endif // INCLUDE_JVMCI
2195 }
2196
2197 if (UsePerfData) {
2198 // save the name of the last method compiled
2199 _perf_last_method->set_value(counters->current_method());
2200 _perf_last_compile_type->set_value(counters->compile_type());
2201 _perf_last_compile_size->set_value(method->code_size() +
2202 task->num_inlined_bytecodes());
2203 if (is_osr) {
2204 _perf_osr_compilation->inc(time.ticks());
2205 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2206 } else {
2207 _perf_standard_compilation->inc(time.ticks());
2208 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2209 }
2210 }
2211
2212 if (CITimeEach) {
2213 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2214 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2215 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2216 }
2217
2218 // Collect counts of successful compilations
2219 _sum_nmethod_size += code->total_size();
2220 _sum_nmethod_code_size += code->insts_size();
2221 _total_compile_count++;
2222
2223 if (UsePerfData) {
2224 _perf_sum_nmethod_size->inc( code->total_size());
2225 _perf_sum_nmethod_code_size->inc(code->insts_size());
2226 _perf_total_compile_count->inc();
2227 }
2228
2229 if (is_osr) {
2230 if (UsePerfData) _perf_total_osr_compile_count->inc();
2231 _total_osr_compile_count++;
2232 } else {
2233 if (UsePerfData) _perf_total_standard_compile_count->inc();
2234 _total_standard_compile_count++;
2235 }
2236 }
2237 // set the current method for the thread to null
2238 if (UsePerfData) counters->set_current_method("");
2239 }
2240
2241 const char* CompileBroker::compiler_name(int comp_level) {
2242 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2243 if (comp == NULL) {
2244 return "no compiler";
2245 } else {
2246 return (comp->name());
2247 }
2248 }
2249
2250 #if INCLUDE_JVMCI
2251 void CompileBroker::print_times(AbstractCompiler* comp) {
2252 CompilerStatistics* stats = comp->stats();
2253 if (stats) {
2254 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}",
2255 comp->name(), stats->bytes_per_second(),
2256 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2257 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2258 stats->_nmethods_size, stats->_nmethods_code_size);
2259 } else { // if (!stats)
2260 assert(false, "Compiler statistics object must exist");
2261 }
2262 comp->print_timers();
2263 }
2264 #endif // INCLUDE_JVMCI
2265
2266 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2267 #if INCLUDE_JVMCI
2268 elapsedTimer standard_compilation;
2269 elapsedTimer total_compilation;
2270 elapsedTimer osr_compilation;
2271
2272 int standard_bytes_compiled = 0;
2273 int osr_bytes_compiled = 0;
2274
2275 int standard_compile_count = 0;
2276 int osr_compile_count = 0;
2277 int total_compile_count = 0;
2278
2279 int nmethods_size = 0;
2280 int nmethods_code_size = 0;
2281 bool printedHeader = false;
2282
2283 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2284 AbstractCompiler* comp = _compilers[i];
2285 if (comp != NULL) {
2286 if (per_compiler && aggregate && !printedHeader) {
2287 printedHeader = true;
2288 tty->cr();
2289 tty->print_cr("Individual compiler times (for compiled methods only)");
2290 tty->print_cr("------------------------------------------------");
2291 tty->cr();
2292 }
2293 CompilerStatistics* stats = comp->stats();
2294
2295 if (stats) {
2296 standard_compilation.add(stats->_standard._time);
2297 osr_compilation.add(stats->_osr._time);
2298
2299 standard_bytes_compiled += stats->_standard._bytes;
2300 osr_bytes_compiled += stats->_osr._bytes;
2301
2302 standard_compile_count += stats->_standard._count;
2303 osr_compile_count += stats->_osr._count;
2304
2305 nmethods_size += stats->_nmethods_size;
2306 nmethods_code_size += stats->_nmethods_code_size;
2307 } else { // if (!stats)
2308 assert(false, "Compiler statistics object must exist");
2309 }
2310
2311 if (per_compiler) {
2312 print_times(comp);
2313 }
2314 }
2315 }
2316 total_compile_count = osr_compile_count + standard_compile_count;
2317 total_compilation.add(osr_compilation);
2318 total_compilation.add(standard_compilation);
2319
2320 // In hosted mode, print the JVMCI compiler specific counters manually.
2321 if (!UseJVMCICompiler) {
2322 JVMCICompiler::print_compilation_timers();
2323 }
2324 #else // INCLUDE_JVMCI
2325 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2326 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2327 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2328
2329 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2330 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2331
2332 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2333 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2334 int total_compile_count = CompileBroker::_total_compile_count;
2335
2336 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2337 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2338 #endif // INCLUDE_JVMCI
2339
2340 if (!aggregate) {
2341 return;
2342 }
2343 tty->cr();
2344 tty->print_cr("Accumulated compiler times");
2345 tty->print_cr("----------------------------------------------------------");
2346 //0000000000111111111122222222223333333333444444444455555555556666666666
2347 //0123456789012345678901234567890123456789012345678901234567890123456789
2348 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2349 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2350 standard_compilation.seconds(),
2351 standard_compilation.seconds() / standard_compile_count);
2352 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2353 CompileBroker::_t_bailedout_compilation.seconds(),
2354 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2355 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2356 osr_compilation.seconds(),
2357 osr_compilation.seconds() / osr_compile_count);
2358 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2359 CompileBroker::_t_invalidated_compilation.seconds(),
2360 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2361
2362 AbstractCompiler *comp = compiler(CompLevel_simple);
2363 if (comp != NULL) {
2364 tty->cr();
2365 comp->print_timers();
2366 }
2367 comp = compiler(CompLevel_full_optimization);
2368 if (comp != NULL) {
2369 tty->cr();
2370 comp->print_timers();
2371 }
2372 tty->cr();
2373 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2374 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2375 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2376 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2377 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2378 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2379 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2380 double tcs = total_compilation.seconds();
2381 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2382 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2383 tty->cr();
2384 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2385 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2386 }
2387
2388 // Debugging output for failure
2389 void CompileBroker::print_last_compile() {
2390 if (_last_compile_level != CompLevel_none &&
2391 compiler(_last_compile_level) != NULL &&
2392 _last_compile_type != no_compile) {
2393 if (_last_compile_type == osr_compile) {
2394 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2395 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2396 } else {
2397 tty->print_cr("Last parse: %d+++(%d) %s",
2398 _compilation_id, _last_compile_level, _last_method_compiled);
2399 }
2400 }
2401 }
2402