1 /*
2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/symbolTable.hpp"
27 #include "classfile/systemDictionary.hpp"
28 #include "classfile/vmSymbols.hpp"
29 #include "code/codeCache.hpp"
30 #include "code/dependencyContext.hpp"
31 #include "compiler/compileBroker.hpp"
32 #include "compiler/compileLog.hpp"
33 #include "compiler/compilerOracle.hpp"
34 #include "compiler/directivesParser.hpp"
35 #include "interpreter/linkResolver.hpp"
36 #include "logging/log.hpp"
37 #include "logging/logStream.hpp"
38 #include "memory/allocation.inline.hpp"
39 #include "memory/resourceArea.hpp"
40 #include "oops/methodData.hpp"
41 #include "oops/method.hpp"
42 #include "oops/oop.inline.hpp"
43 #include "prims/jvm.h"
44 #include "prims/nativeLookup.hpp"
45 #include "prims/whitebox.hpp"
46 #include "runtime/arguments.hpp"
47 #include "runtime/atomic.hpp"
48 #include "runtime/compilationPolicy.hpp"
49 #include "runtime/init.hpp"
50 #include "runtime/interfaceSupport.hpp"
51 #include "runtime/javaCalls.hpp"
52 #include "runtime/os.hpp"
53 #include "runtime/sharedRuntime.hpp"
54 #include "runtime/sweeper.hpp"
55 #include "runtime/timerTrace.hpp"
56 #include "trace/tracing.hpp"
57 #include "utilities/debug.hpp"
58 #include "utilities/dtrace.hpp"
59 #include "utilities/events.hpp"
60 #include "utilities/formatBuffer.hpp"
61 #ifdef COMPILER1
62 #include "c1/c1_Compiler.hpp"
63 #endif
64 #if INCLUDE_JVMCI
65 #include "jvmci/jvmciCompiler.hpp"
66 #include "jvmci/jvmciRuntime.hpp"
67 #include "jvmci/jvmciJavaClasses.hpp"
68 #include "runtime/vframe.hpp"
69 #endif
70 #ifdef COMPILER2
71 #include "opto/c2compiler.hpp"
72 #endif
73 #ifdef SHARK
74 #include "shark/sharkCompiler.hpp"
75 #endif
76
77 #ifdef DTRACE_ENABLED
78
79 // Only bother with this argument setup if dtrace is available
80
81 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
82 { \
83 Symbol* klass_name = (method)->klass_name(); \
84 Symbol* name = (method)->name(); \
85 Symbol* signature = (method)->signature(); \
86 HOTSPOT_METHOD_COMPILE_BEGIN( \
87 (char *) comp_name, strlen(comp_name), \
88 (char *) klass_name->bytes(), klass_name->utf8_length(), \
89 (char *) name->bytes(), name->utf8_length(), \
90 (char *) signature->bytes(), signature->utf8_length()); \
91 }
92
93 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
94 { \
95 Symbol* klass_name = (method)->klass_name(); \
96 Symbol* name = (method)->name(); \
97 Symbol* signature = (method)->signature(); \
98 HOTSPOT_METHOD_COMPILE_END( \
99 (char *) comp_name, strlen(comp_name), \
100 (char *) klass_name->bytes(), klass_name->utf8_length(), \
101 (char *) name->bytes(), name->utf8_length(), \
102 (char *) signature->bytes(), signature->utf8_length(), (success)); \
103 }
104
105 #else // ndef DTRACE_ENABLED
106
107 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
108 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
109
110 #endif // ndef DTRACE_ENABLED
111
112 bool CompileBroker::_initialized = false;
113 volatile bool CompileBroker::_should_block = false;
114 volatile jint CompileBroker::_print_compilation_warning = 0;
115 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
116
117 // The installed compiler(s)
118 AbstractCompiler* CompileBroker::_compilers[2];
119
120 // These counters are used to assign an unique ID to each compilation.
121 volatile jint CompileBroker::_compilation_id = 0;
122 volatile jint CompileBroker::_osr_compilation_id = 0;
123
124 // Debugging information
125 int CompileBroker::_last_compile_type = no_compile;
126 int CompileBroker::_last_compile_level = CompLevel_none;
127 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
128
129 // Performance counters
130 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
131 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
132 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
133
134 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
135 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
136 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
137 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
138 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
139
140 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
141 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
142 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
143 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
144
145 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
146 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
147 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
148 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
149 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
150 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
151 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
152
153 // Timers and counters for generating statistics
154 elapsedTimer CompileBroker::_t_total_compilation;
155 elapsedTimer CompileBroker::_t_osr_compilation;
156 elapsedTimer CompileBroker::_t_standard_compilation;
157 elapsedTimer CompileBroker::_t_invalidated_compilation;
158 elapsedTimer CompileBroker::_t_bailedout_compilation;
159
160 int CompileBroker::_total_bailout_count = 0;
161 int CompileBroker::_total_invalidated_count = 0;
162 int CompileBroker::_total_compile_count = 0;
163 int CompileBroker::_total_osr_compile_count = 0;
164 int CompileBroker::_total_standard_compile_count = 0;
165
166 int CompileBroker::_sum_osr_bytes_compiled = 0;
167 int CompileBroker::_sum_standard_bytes_compiled = 0;
168 int CompileBroker::_sum_nmethod_size = 0;
169 int CompileBroker::_sum_nmethod_code_size = 0;
170
171 long CompileBroker::_peak_compilation_time = 0;
172
173 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
174 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
175
176
177
178 class CompilationLog : public StringEventLog {
179 public:
180 CompilationLog() : StringEventLog("Compilation events") {
181 }
182
183 void log_compile(JavaThread* thread, CompileTask* task) {
184 StringLogMessage lm;
185 stringStream sstr = lm.stream();
186 // msg.time_stamp().update_to(tty->time_stamp().ticks());
187 task->print(&sstr, NULL, true, false);
188 log(thread, "%s", (const char*)lm);
189 }
190
191 void log_nmethod(JavaThread* thread, nmethod* nm) {
192 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
193 nm->compile_id(), nm->is_osr_method() ? "%" : "",
194 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
195 }
196
197 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
198 StringLogMessage lm;
199 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
200 if (retry_message != NULL) {
201 lm.append(" (%s)", retry_message);
202 }
203 lm.print("\n");
204 log(thread, "%s", (const char*)lm);
205 }
206
207 void log_metaspace_failure(const char* reason) {
208 ResourceMark rm;
209 StringLogMessage lm;
210 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
211 lm.print("\n");
212 log(JavaThread::current(), "%s", (const char*)lm);
213 }
214 };
215
216 static CompilationLog* _compilation_log = NULL;
217
218 bool compileBroker_init() {
219 if (LogEvents) {
220 _compilation_log = new CompilationLog();
221 }
222
223 // init directives stack, adding default directive
224 DirectivesStack::init();
225
226 if (DirectivesParser::has_file()) {
227 return DirectivesParser::parse_from_flag();
228 } else if (CompilerDirectivesPrint) {
229 // Print default directive even when no other was added
230 DirectivesStack::print(tty);
231 }
232
233 return true;
234 }
235
236 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
237 CompilerThread* thread = CompilerThread::current();
238 thread->set_task(task);
239 #if INCLUDE_JVMCI
240 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
241 task->set_jvmci_compiler_thread(thread);
242 }
243 #endif
244 CompileLog* log = thread->log();
245 if (log != NULL) task->log_task_start(log);
246 }
247
248 CompileTaskWrapper::~CompileTaskWrapper() {
249 CompilerThread* thread = CompilerThread::current();
250 CompileTask* task = thread->task();
251 CompileLog* log = thread->log();
252 if (log != NULL) task->log_task_done(log);
253 thread->set_task(NULL);
254 task->set_code_handle(NULL);
255 thread->set_env(NULL);
256 if (task->is_blocking()) {
257 bool free_task = false;
258 {
259 MutexLocker notifier(task->lock(), thread);
260 task->mark_complete();
261 #if INCLUDE_JVMCI
262 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
263 if (!task->has_waiter()) {
264 // The waiting thread timed out and thus did not free the task.
265 free_task = true;
266 }
267 task->set_jvmci_compiler_thread(NULL);
268 }
269 #endif
270 if (!free_task) {
271 // Notify the waiting thread that the compilation has completed
272 // so that it can free the task.
273 task->lock()->notify_all();
274 }
275 }
276 if (free_task) {
277 // The task can only be freed once the task lock is released.
278 CompileTask::free(task);
279 }
280 } else {
281 task->mark_complete();
282
283 // By convention, the compiling thread is responsible for
284 // recycling a non-blocking CompileTask.
285 CompileTask::free(task);
286 }
287 }
288
289 /**
290 * Add a CompileTask to a CompileQueue.
291 */
292 void CompileQueue::add(CompileTask* task) {
293 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
294
295 task->set_next(NULL);
296 task->set_prev(NULL);
297
298 if (_last == NULL) {
299 // The compile queue is empty.
300 assert(_first == NULL, "queue is empty");
301 _first = task;
302 _last = task;
303 } else {
304 // Append the task to the queue.
305 assert(_last->next() == NULL, "not last");
306 _last->set_next(task);
307 task->set_prev(_last);
308 _last = task;
309 }
310 ++_size;
311
312 // Mark the method as being in the compile queue.
313 task->method()->set_queued_for_compilation();
314
315 if (CIPrintCompileQueue) {
316 print_tty();
317 }
318
319 if (LogCompilation && xtty != NULL) {
320 task->log_task_queued();
321 }
322
323 // Notify CompilerThreads that a task is available.
324 MethodCompileQueue_lock->notify_all();
325 }
326
327 /**
328 * Empties compilation queue by putting all compilation tasks onto
329 * a freelist. Furthermore, the method wakes up all threads that are
330 * waiting on a compilation task to finish. This can happen if background
331 * compilation is disabled.
332 */
333 void CompileQueue::free_all() {
334 MutexLocker mu(MethodCompileQueue_lock);
335 CompileTask* next = _first;
336
337 // Iterate over all tasks in the compile queue
338 while (next != NULL) {
339 CompileTask* current = next;
340 next = current->next();
341 {
342 // Wake up thread that blocks on the compile task.
343 MutexLocker ct_lock(current->lock());
344 current->lock()->notify();
345 }
346 // Put the task back on the freelist.
347 CompileTask::free(current);
348 }
349 _first = NULL;
350
351 // Wake up all threads that block on the queue.
352 MethodCompileQueue_lock->notify_all();
353 }
354
355 /**
356 * Get the next CompileTask from a CompileQueue
357 */
358 CompileTask* CompileQueue::get() {
359 // save methods from RedefineClasses across safepoint
360 // across MethodCompileQueue_lock below.
361 methodHandle save_method;
362 methodHandle save_hot_method;
363
364 MutexLocker locker(MethodCompileQueue_lock);
365 // If _first is NULL we have no more compile jobs. There are two reasons for
366 // having no compile jobs: First, we compiled everything we wanted. Second,
367 // we ran out of code cache so compilation has been disabled. In the latter
368 // case we perform code cache sweeps to free memory such that we can re-enable
369 // compilation.
370 while (_first == NULL) {
371 // Exit loop if compilation is disabled forever
372 if (CompileBroker::is_compilation_disabled_forever()) {
373 return NULL;
374 }
375
376 // If there are no compilation tasks and we can compile new jobs
377 // (i.e., there is enough free space in the code cache) there is
378 // no need to invoke the sweeper. As a result, the hotness of methods
379 // remains unchanged. This behavior is desired, since we want to keep
380 // the stable state, i.e., we do not want to evict methods from the
381 // code cache if it is unnecessary.
382 // We need a timed wait here, since compiler threads can exit if compilation
383 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
384 // is not critical and we do not want idle compiler threads to wake up too often.
385 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
386 }
387
388 if (CompileBroker::is_compilation_disabled_forever()) {
389 return NULL;
390 }
391
392 CompileTask* task;
393 {
394 NoSafepointVerifier nsv;
395 task = CompilationPolicy::policy()->select_task(this);
396 }
397
398 if (task != NULL) {
399 // Save method pointers across unlock safepoint. The task is removed from
400 // the compilation queue, which is walked during RedefineClasses.
401 save_method = methodHandle(task->method());
402 save_hot_method = methodHandle(task->hot_method());
403
404 remove(task);
405 purge_stale_tasks(); // may temporarily release MCQ lock
406 }
407
408 return task;
409 }
410
411 // Clean & deallocate stale compile tasks.
412 // Temporarily releases MethodCompileQueue lock.
413 void CompileQueue::purge_stale_tasks() {
414 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
415 if (_first_stale != NULL) {
416 // Stale tasks are purged when MCQ lock is released,
417 // but _first_stale updates are protected by MCQ lock.
418 // Once task processing starts and MCQ lock is released,
419 // other compiler threads can reuse _first_stale.
420 CompileTask* head = _first_stale;
421 _first_stale = NULL;
422 {
423 MutexUnlocker ul(MethodCompileQueue_lock);
424 for (CompileTask* task = head; task != NULL; ) {
425 CompileTask* next_task = task->next();
426 CompileTaskWrapper ctw(task); // Frees the task
427 task->set_failure_reason("stale task");
428 task = next_task;
429 }
430 }
431 }
432 }
433
434 void CompileQueue::remove(CompileTask* task) {
435 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
436 if (task->prev() != NULL) {
437 task->prev()->set_next(task->next());
438 } else {
439 // max is the first element
440 assert(task == _first, "Sanity");
441 _first = task->next();
442 }
443
444 if (task->next() != NULL) {
445 task->next()->set_prev(task->prev());
446 } else {
447 // max is the last element
448 assert(task == _last, "Sanity");
449 _last = task->prev();
450 }
451 --_size;
452 }
453
454 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
455 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
456 remove(task);
457
458 // Enqueue the task for reclamation (should be done outside MCQ lock)
459 task->set_next(_first_stale);
460 task->set_prev(NULL);
461 _first_stale = task;
462 }
463
464 // methods in the compile queue need to be marked as used on the stack
465 // so that they don't get reclaimed by Redefine Classes
466 void CompileQueue::mark_on_stack() {
467 CompileTask* task = _first;
468 while (task != NULL) {
469 task->mark_on_stack();
470 task = task->next();
471 }
472 }
473
474
475 CompileQueue* CompileBroker::compile_queue(int comp_level) {
476 if (is_c2_compile(comp_level)) return _c2_compile_queue;
477 if (is_c1_compile(comp_level)) return _c1_compile_queue;
478 return NULL;
479 }
480
481 void CompileBroker::print_compile_queues(outputStream* st) {
482 st->print_cr("Current compiles: ");
483 MutexLocker locker(MethodCompileQueue_lock);
484
485 char buf[2000];
486 int buflen = sizeof(buf);
487 Threads::print_threads_compiling(st, buf, buflen);
488
489 st->cr();
490 if (_c1_compile_queue != NULL) {
491 _c1_compile_queue->print(st);
492 }
493 if (_c2_compile_queue != NULL) {
494 _c2_compile_queue->print(st);
495 }
496 }
497
498 void CompileQueue::print(outputStream* st) {
499 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
500 st->print_cr("%s:", name());
501 CompileTask* task = _first;
502 if (task == NULL) {
503 st->print_cr("Empty");
504 } else {
505 while (task != NULL) {
506 task->print(st, NULL, true, true);
507 task = task->next();
508 }
509 }
510 st->cr();
511 }
512
513 void CompileQueue::print_tty() {
514 ttyLocker ttyl;
515 print(tty);
516 }
517
518 CompilerCounters::CompilerCounters() {
519 _current_method[0] = '\0';
520 _compile_type = CompileBroker::no_compile;
521 }
522
523 // ------------------------------------------------------------------
524 // CompileBroker::compilation_init
525 //
526 // Initialize the Compilation object
527 void CompileBroker::compilation_init(TRAPS) {
528 _last_method_compiled[0] = '\0';
529
530 // No need to initialize compilation system if we do not use it.
531 if (!UseCompiler) {
532 return;
533 }
534 #ifndef SHARK
535 // Set the interface to the current compiler(s).
536 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
537 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
538
539 #if INCLUDE_JVMCI
540 if (EnableJVMCI) {
541 // This is creating a JVMCICompiler singleton.
542 JVMCICompiler* jvmci = new JVMCICompiler();
543
544 if (UseJVMCICompiler) {
545 _compilers[1] = jvmci;
546 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
547 if (BootstrapJVMCI) {
548 // JVMCI will bootstrap so give it more threads
549 c2_count = MIN2(32, os::active_processor_count());
550 }
551 } else {
552 c2_count = JVMCIThreads;
553 }
554 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
555 } else {
556 c1_count = JVMCIHostThreads;
557 }
558 }
559 }
560 #endif // INCLUDE_JVMCI
561
562 #ifdef COMPILER1
563 if (c1_count > 0) {
564 _compilers[0] = new Compiler();
565 }
566 #endif // COMPILER1
567
568 #ifdef COMPILER2
569 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
570 if (c2_count > 0) {
571 _compilers[1] = new C2Compiler();
572 }
573 }
574 #endif // COMPILER2
575
576 #else // SHARK
577 int c1_count = 0;
578 int c2_count = 1;
579
580 _compilers[1] = new SharkCompiler();
581 #endif // SHARK
582
583 // Start the compiler thread(s) and the sweeper thread
584 init_compiler_sweeper_threads(c1_count, c2_count);
585 // totalTime performance counter is always created as it is required
586 // by the implementation of java.lang.management.CompilationMBean.
587 {
588 EXCEPTION_MARK;
589 _perf_total_compilation =
590 PerfDataManager::create_counter(JAVA_CI, "totalTime",
591 PerfData::U_Ticks, CHECK);
592 }
593
594 if (UsePerfData) {
595
596 EXCEPTION_MARK;
597
598 // create the jvmstat performance counters
599 _perf_osr_compilation =
600 PerfDataManager::create_counter(SUN_CI, "osrTime",
601 PerfData::U_Ticks, CHECK);
602
603 _perf_standard_compilation =
604 PerfDataManager::create_counter(SUN_CI, "standardTime",
605 PerfData::U_Ticks, CHECK);
606
607 _perf_total_bailout_count =
608 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
609 PerfData::U_Events, CHECK);
610
611 _perf_total_invalidated_count =
612 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
613 PerfData::U_Events, CHECK);
614
615 _perf_total_compile_count =
616 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
617 PerfData::U_Events, CHECK);
618 _perf_total_osr_compile_count =
619 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
620 PerfData::U_Events, CHECK);
621
622 _perf_total_standard_compile_count =
623 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
624 PerfData::U_Events, CHECK);
625
626 _perf_sum_osr_bytes_compiled =
627 PerfDataManager::create_counter(SUN_CI, "osrBytes",
628 PerfData::U_Bytes, CHECK);
629
630 _perf_sum_standard_bytes_compiled =
631 PerfDataManager::create_counter(SUN_CI, "standardBytes",
632 PerfData::U_Bytes, CHECK);
633
634 _perf_sum_nmethod_size =
635 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
636 PerfData::U_Bytes, CHECK);
637
638 _perf_sum_nmethod_code_size =
639 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
640 PerfData::U_Bytes, CHECK);
641
642 _perf_last_method =
643 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
644 CompilerCounters::cmname_buffer_length,
645 "", CHECK);
646
647 _perf_last_failed_method =
648 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
649 CompilerCounters::cmname_buffer_length,
650 "", CHECK);
651
652 _perf_last_invalidated_method =
653 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
654 CompilerCounters::cmname_buffer_length,
655 "", CHECK);
656
657 _perf_last_compile_type =
658 PerfDataManager::create_variable(SUN_CI, "lastType",
659 PerfData::U_None,
660 (jlong)CompileBroker::no_compile,
661 CHECK);
662
663 _perf_last_compile_size =
664 PerfDataManager::create_variable(SUN_CI, "lastSize",
665 PerfData::U_Bytes,
666 (jlong)CompileBroker::no_compile,
667 CHECK);
668
669
670 _perf_last_failed_type =
671 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
672 PerfData::U_None,
673 (jlong)CompileBroker::no_compile,
674 CHECK);
675
676 _perf_last_invalidated_type =
677 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
678 PerfData::U_None,
679 (jlong)CompileBroker::no_compile,
680 CHECK);
681 }
682
683 _initialized = true;
684 }
685
686
687 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
688 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
689 JavaThread* thread = NULL;
690 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
691 InstanceKlass* klass = InstanceKlass::cast(k);
692 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
693 Handle string = java_lang_String::create_from_str(name, CHECK_0);
694
695 // Initialize thread_oop to put it into the system threadGroup
696 Handle thread_group (THREAD, Universe::system_thread_group());
697 JavaValue result(T_VOID);
698 JavaCalls::call_special(&result, thread_oop,
699 klass,
700 vmSymbols::object_initializer_name(),
701 vmSymbols::threadgroup_string_void_signature(),
702 thread_group,
703 string,
704 CHECK_0);
705
706 {
707 MutexLocker mu(Threads_lock, THREAD);
708 if (compiler_thread) {
709 thread = new CompilerThread(queue, counters);
710 } else {
711 thread = new CodeCacheSweeperThread();
712 }
713 // At this point the new CompilerThread data-races with this startup
714 // thread (which I believe is the primoridal thread and NOT the VM
715 // thread). This means Java bytecodes being executed at startup can
716 // queue compile jobs which will run at whatever default priority the
717 // newly created CompilerThread runs at.
718
719
720 // At this point it may be possible that no osthread was created for the
721 // JavaThread due to lack of memory. We would have to throw an exception
722 // in that case. However, since this must work and we do not allow
723 // exceptions anyway, check and abort if this fails.
724
725 if (thread == NULL || thread->osthread() == NULL) {
726 vm_exit_during_initialization("java.lang.OutOfMemoryError",
727 os::native_thread_creation_failed_msg());
728 }
729
730 java_lang_Thread::set_thread(thread_oop(), thread);
731
732 // Note that this only sets the JavaThread _priority field, which by
733 // definition is limited to Java priorities and not OS priorities.
734 // The os-priority is set in the CompilerThread startup code itself
735
736 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
737
738 // Note that we cannot call os::set_priority because it expects Java
739 // priorities and we are *explicitly* using OS priorities so that it's
740 // possible to set the compiler thread priority higher than any Java
741 // thread.
742
743 int native_prio = CompilerThreadPriority;
744 if (native_prio == -1) {
745 if (UseCriticalCompilerThreadPriority) {
746 native_prio = os::java_to_os_priority[CriticalPriority];
747 } else {
748 native_prio = os::java_to_os_priority[NearMaxPriority];
749 }
750 }
751 os::set_native_priority(thread, native_prio);
752
753 java_lang_Thread::set_daemon(thread_oop());
754
755 thread->set_threadObj(thread_oop());
756 if (compiler_thread) {
757 thread->as_CompilerThread()->set_compiler(comp);
758 }
759 Threads::add(thread);
760 Thread::start(thread);
761 }
762
763 // Let go of Threads_lock before yielding
764 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
765
766 return thread;
767 }
768
769
770 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
771 EXCEPTION_MARK;
772 #if !defined(ZERO) && !defined(SHARK)
773 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
774 #endif // !ZERO && !SHARK
775 // Initialize the compilation queue
776 if (c2_compiler_count > 0) {
777 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
778 _c2_compile_queue = new CompileQueue(name);
779 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
780 }
781 if (c1_compiler_count > 0) {
782 _c1_compile_queue = new CompileQueue("C1 compile queue");
783 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
784 }
785
786 int compiler_count = c1_compiler_count + c2_compiler_count;
787
788 char name_buffer[256];
789 const bool compiler_thread = true;
790 for (int i = 0; i < c2_compiler_count; i++) {
791 // Create a name for our thread.
792 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
793 CompilerCounters* counters = new CompilerCounters();
794 // Shark and C2
795 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
796 }
797
798 for (int i = c2_compiler_count; i < compiler_count; i++) {
799 // Create a name for our thread.
800 sprintf(name_buffer, "C1 CompilerThread%d", i);
801 CompilerCounters* counters = new CompilerCounters();
802 // C1
803 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
804 }
805
806 if (UsePerfData) {
807 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
808 }
809
810 if (MethodFlushing) {
811 // Initialize the sweeper thread
812 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
813 }
814 }
815
816
817 /**
818 * Set the methods on the stack as on_stack so that redefine classes doesn't
819 * reclaim them. This method is executed at a safepoint.
820 */
821 void CompileBroker::mark_on_stack() {
822 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
823 // Since we are at a safepoint, we do not need a lock to access
824 // the compile queues.
825 if (_c2_compile_queue != NULL) {
826 _c2_compile_queue->mark_on_stack();
827 }
828 if (_c1_compile_queue != NULL) {
829 _c1_compile_queue->mark_on_stack();
830 }
831 }
832
833 // ------------------------------------------------------------------
834 // CompileBroker::compile_method
835 //
836 // Request compilation of a method.
837 void CompileBroker::compile_method_base(const methodHandle& method,
838 int osr_bci,
839 int comp_level,
840 const methodHandle& hot_method,
841 int hot_count,
842 CompileTask::CompileReason compile_reason,
843 bool blocking,
844 Thread* thread) {
845 guarantee(!method->is_abstract(), "cannot compile abstract methods");
846 assert(method->method_holder()->is_instance_klass(),
847 "sanity check");
848 assert(!method->method_holder()->is_not_initialized(),
849 "method holder must be initialized");
850 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
851
852 if (CIPrintRequests) {
853 tty->print("request: ");
854 method->print_short_name(tty);
855 if (osr_bci != InvocationEntryBci) {
856 tty->print(" osr_bci: %d", osr_bci);
857 }
858 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
859 if (!hot_method.is_null()) {
860 tty->print(" hot: ");
861 if (hot_method() != method()) {
862 hot_method->print_short_name(tty);
863 } else {
864 tty->print("yes");
865 }
866 }
867 tty->cr();
868 }
869
870 // A request has been made for compilation. Before we do any
871 // real work, check to see if the method has been compiled
872 // in the meantime with a definitive result.
873 if (compilation_is_complete(method, osr_bci, comp_level)) {
874 return;
875 }
876
877 #ifndef PRODUCT
878 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
879 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
880 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
881 return;
882 }
883 }
884 #endif
885
886 // If this method is already in the compile queue, then
887 // we do not block the current thread.
888 if (compilation_is_in_queue(method)) {
889 // We may want to decay our counter a bit here to prevent
890 // multiple denied requests for compilation. This is an
891 // open compilation policy issue. Note: The other possibility,
892 // in the case that this is a blocking compile request, is to have
893 // all subsequent blocking requesters wait for completion of
894 // ongoing compiles. Note that in this case we'll need a protocol
895 // for freeing the associated compile tasks. [Or we could have
896 // a single static monitor on which all these waiters sleep.]
897 return;
898 }
899
900 if (TieredCompilation) {
901 // Tiered policy requires MethodCounters to exist before adding a method to
902 // the queue. Create if we don't have them yet.
903 method->get_method_counters(thread);
904 }
905
906 // Outputs from the following MutexLocker block:
907 CompileTask* task = NULL;
908 CompileQueue* queue = compile_queue(comp_level);
909
910 // Acquire our lock.
911 {
912 MutexLocker locker(MethodCompileQueue_lock, thread);
913
914 // Make sure the method has not slipped into the queues since
915 // last we checked; note that those checks were "fast bail-outs".
916 // Here we need to be more careful, see 14012000 below.
917 if (compilation_is_in_queue(method)) {
918 return;
919 }
920
921 // We need to check again to see if the compilation has
922 // completed. A previous compilation may have registered
923 // some result.
924 if (compilation_is_complete(method, osr_bci, comp_level)) {
925 return;
926 }
927
928 // We now know that this compilation is not pending, complete,
929 // or prohibited. Assign a compile_id to this compilation
930 // and check to see if it is in our [Start..Stop) range.
931 int compile_id = assign_compile_id(method, osr_bci);
932 if (compile_id == 0) {
933 // The compilation falls outside the allowed range.
934 return;
935 }
936
937 #if INCLUDE_JVMCI
938 if (UseJVMCICompiler) {
939 if (blocking) {
940 // Don't allow blocking compiles for requests triggered by JVMCI.
941 if (thread->is_Compiler_thread()) {
942 blocking = false;
943 }
944
945 // Don't allow blocking compiles if inside a class initializer or while performing class loading
946 vframeStream vfst((JavaThread*) thread);
947 for (; !vfst.at_end(); vfst.next()) {
948 if (vfst.method()->is_static_initializer() ||
949 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
950 vfst.method()->name() == vmSymbols::loadClass_name())) {
951 blocking = false;
952 break;
953 }
954 }
955
956 // Don't allow blocking compilation requests to JVMCI
957 // if JVMCI itself is not yet initialized
958 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
959 blocking = false;
960 }
961
962 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
963 // to avoid deadlock between compiler thread(s) and threads run at shutdown
964 // such as the DestroyJavaVM thread.
965 if (JVMCIRuntime::shutdown_called()) {
966 blocking = false;
967 }
968 }
969 }
970 #endif // INCLUDE_JVMCI
971
972 // We will enter the compilation in the queue.
973 // 14012000: Note that this sets the queued_for_compile bits in
974 // the target method. We can now reason that a method cannot be
975 // queued for compilation more than once, as follows:
976 // Before a thread queues a task for compilation, it first acquires
977 // the compile queue lock, then checks if the method's queued bits
978 // are set or it has already been compiled. Thus there can not be two
979 // instances of a compilation task for the same method on the
980 // compilation queue. Consider now the case where the compilation
981 // thread has already removed a task for that method from the queue
982 // and is in the midst of compiling it. In this case, the
983 // queued_for_compile bits must be set in the method (and these
984 // will be visible to the current thread, since the bits were set
985 // under protection of the compile queue lock, which we hold now.
986 // When the compilation completes, the compiler thread first sets
987 // the compilation result and then clears the queued_for_compile
988 // bits. Neither of these actions are protected by a barrier (or done
989 // under the protection of a lock), so the only guarantee we have
990 // (on machines with TSO (Total Store Order)) is that these values
991 // will update in that order. As a result, the only combinations of
992 // these bits that the current thread will see are, in temporal order:
993 // <RESULT, QUEUE> :
994 // <0, 1> : in compile queue, but not yet compiled
995 // <1, 1> : compiled but queue bit not cleared
996 // <1, 0> : compiled and queue bit cleared
997 // Because we first check the queue bits then check the result bits,
998 // we are assured that we cannot introduce a duplicate task.
999 // Note that if we did the tests in the reverse order (i.e. check
1000 // result then check queued bit), we could get the result bit before
1001 // the compilation completed, and the queue bit after the compilation
1002 // completed, and end up introducing a "duplicate" (redundant) task.
1003 // In that case, the compiler thread should first check if a method
1004 // has already been compiled before trying to compile it.
1005 // NOTE: in the event that there are multiple compiler threads and
1006 // there is de-optimization/recompilation, things will get hairy,
1007 // and in that case it's best to protect both the testing (here) of
1008 // these bits, and their updating (here and elsewhere) under a
1009 // common lock.
1010 task = create_compile_task(queue,
1011 compile_id, method,
1012 osr_bci, comp_level,
1013 hot_method, hot_count, compile_reason,
1014 blocking);
1015 }
1016
1017 if (blocking) {
1018 wait_for_completion(task);
1019 }
1020 }
1021
1022 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1023 int comp_level,
1024 const methodHandle& hot_method, int hot_count,
1025 CompileTask::CompileReason compile_reason,
1026 Thread* THREAD) {
1027 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1028 if (!_initialized || comp_level == CompLevel_none) {
1029 return NULL;
1030 }
1031
1032 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1033 assert(comp != NULL, "Ensure we have a compiler");
1034
1035 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1036 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1037 DirectivesStack::release(directive);
1038 return nm;
1039 }
1040
1041 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1042 int comp_level,
1043 const methodHandle& hot_method, int hot_count,
1044 CompileTask::CompileReason compile_reason,
1045 DirectiveSet* directive,
1046 Thread* THREAD) {
1047
1048 // make sure arguments make sense
1049 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1050 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1051 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1052 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1053 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1054 // allow any levels for WhiteBox
1055 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1056 // return quickly if possible
1057
1058 // lock, make sure that the compilation
1059 // isn't prohibited in a straightforward way.
1060 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1061 if (comp == NULL || !comp->can_compile_method(method) ||
1062 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1063 return NULL;
1064 }
1065
1066 #if INCLUDE_JVMCI
1067 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1068 return NULL;
1069 }
1070 #endif
1071
1072 if (osr_bci == InvocationEntryBci) {
1073 // standard compilation
1074 CompiledMethod* method_code = method->code();
1075 if (method_code != NULL && method_code->is_nmethod()) {
1076 if (compilation_is_complete(method, osr_bci, comp_level)) {
1077 return (nmethod*) method_code;
1078 }
1079 }
1080 if (method->is_not_compilable(comp_level)) {
1081 return NULL;
1082 }
1083 } else {
1084 // osr compilation
1085 #ifndef TIERED
1086 // seems like an assert of dubious value
1087 assert(comp_level == CompLevel_highest_tier,
1088 "all OSR compiles are assumed to be at a single compilation level");
1089 #endif // TIERED
1090 // We accept a higher level osr method
1091 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1092 if (nm != NULL) return nm;
1093 if (method->is_not_osr_compilable(comp_level)) return NULL;
1094 }
1095
1096 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1097 // some prerequisites that are compiler specific
1098 if (comp->is_c2() || comp->is_shark()) {
1099 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1100 // Resolve all classes seen in the signature of the method
1101 // we are compiling.
1102 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1103 }
1104
1105 // If the method is native, do the lookup in the thread requesting
1106 // the compilation. Native lookups can load code, which is not
1107 // permitted during compilation.
1108 //
1109 // Note: A native method implies non-osr compilation which is
1110 // checked with an assertion at the entry of this method.
1111 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1112 bool in_base_library;
1113 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1114 if (HAS_PENDING_EXCEPTION) {
1115 // In case of an exception looking up the method, we just forget
1116 // about it. The interpreter will kick-in and throw the exception.
1117 method->set_not_compilable(); // implies is_not_osr_compilable()
1118 CLEAR_PENDING_EXCEPTION;
1119 return NULL;
1120 }
1121 assert(method->has_native_function(), "must have native code by now");
1122 }
1123
1124 // RedefineClasses() has replaced this method; just return
1125 if (method->is_old()) {
1126 return NULL;
1127 }
1128
1129 // JVMTI -- post_compile_event requires jmethod_id() that may require
1130 // a lock the compiling thread can not acquire. Prefetch it here.
1131 if (JvmtiExport::should_post_compiled_method_load()) {
1132 method->jmethod_id();
1133 }
1134
1135 // do the compilation
1136 if (method->is_native()) {
1137 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1138 // The following native methods:
1139 //
1140 // java.lang.Float.intBitsToFloat
1141 // java.lang.Float.floatToRawIntBits
1142 // java.lang.Double.longBitsToDouble
1143 // java.lang.Double.doubleToRawLongBits
1144 //
1145 // are called through the interpreter even if interpreter native stubs
1146 // are not preferred (i.e., calling through adapter handlers is preferred).
1147 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1148 // if the version of the methods from the native libraries is called.
1149 // As the interpreter and the C2-intrinsified version of the methods preserves
1150 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1151 if ((UseSSE >= 1 &&
1152 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1153 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1154 (UseSSE >= 2 &&
1155 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1156 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1157 return NULL;
1158 }
1159
1160 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1161 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1162 //
1163 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1164 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1165 AdapterHandlerLibrary::create_native_wrapper(method);
1166 } else {
1167 return NULL;
1168 }
1169 } else {
1170 // If the compiler is shut off due to code cache getting full
1171 // fail out now so blocking compiles dont hang the java thread
1172 if (!should_compile_new_jobs()) {
1173 CompilationPolicy::policy()->delay_compilation(method());
1174 return NULL;
1175 }
1176 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1177 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1178 }
1179
1180 // return requested nmethod
1181 // We accept a higher level osr method
1182 if (osr_bci == InvocationEntryBci) {
1183 CompiledMethod* code = method->code();
1184 if (code == NULL) {
1185 return (nmethod*) code;
1186 } else {
1187 return code->as_nmethod_or_null();
1188 }
1189 }
1190 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1191 }
1192
1193
1194 // ------------------------------------------------------------------
1195 // CompileBroker::compilation_is_complete
1196 //
1197 // See if compilation of this method is already complete.
1198 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1199 int osr_bci,
1200 int comp_level) {
1201 bool is_osr = (osr_bci != standard_entry_bci);
1202 if (is_osr) {
1203 if (method->is_not_osr_compilable(comp_level)) {
1204 return true;
1205 } else {
1206 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1207 return (result != NULL);
1208 }
1209 } else {
1210 if (method->is_not_compilable(comp_level)) {
1211 return true;
1212 } else {
1213 CompiledMethod* result = method->code();
1214 if (result == NULL) return false;
1215 return comp_level == result->comp_level();
1216 }
1217 }
1218 }
1219
1220
1221 /**
1222 * See if this compilation is already requested.
1223 *
1224 * Implementation note: there is only a single "is in queue" bit
1225 * for each method. This means that the check below is overly
1226 * conservative in the sense that an osr compilation in the queue
1227 * will block a normal compilation from entering the queue (and vice
1228 * versa). This can be remedied by a full queue search to disambiguate
1229 * cases. If it is deemed profitable, this may be done.
1230 */
1231 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1232 return method->queued_for_compilation();
1233 }
1234
1235 // ------------------------------------------------------------------
1236 // CompileBroker::compilation_is_prohibited
1237 //
1238 // See if this compilation is not allowed.
1239 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1240 bool is_native = method->is_native();
1241 // Some compilers may not support the compilation of natives.
1242 AbstractCompiler *comp = compiler(comp_level);
1243 if (is_native &&
1244 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1245 method->set_not_compilable_quietly(comp_level);
1246 return true;
1247 }
1248
1249 bool is_osr = (osr_bci != standard_entry_bci);
1250 // Some compilers may not support on stack replacement.
1251 if (is_osr &&
1252 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1253 method->set_not_osr_compilable(comp_level);
1254 return true;
1255 }
1256
1257 // The method may be explicitly excluded by the user.
1258 double scale;
1259 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1260 bool quietly = CompilerOracle::should_exclude_quietly();
1261 if (PrintCompilation && !quietly) {
1262 // This does not happen quietly...
1263 ResourceMark rm;
1264 tty->print("### Excluding %s:%s",
1265 method->is_native() ? "generation of native wrapper" : "compile",
1266 (method->is_static() ? " static" : ""));
1267 method->print_short_name(tty);
1268 tty->cr();
1269 }
1270 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1271 }
1272
1273 return false;
1274 }
1275
1276 /**
1277 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1278 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1279 * The function also allows to generate separate compilation IDs for OSR compilations.
1280 */
1281 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1282 #ifdef ASSERT
1283 bool is_osr = (osr_bci != standard_entry_bci);
1284 int id;
1285 if (method->is_native()) {
1286 assert(!is_osr, "can't be osr");
1287 // Adapters, native wrappers and method handle intrinsics
1288 // should be generated always.
1289 return Atomic::add(1, &_compilation_id);
1290 } else if (CICountOSR && is_osr) {
1291 id = Atomic::add(1, &_osr_compilation_id);
1292 if (CIStartOSR <= id && id < CIStopOSR) {
1293 return id;
1294 }
1295 } else {
1296 id = Atomic::add(1, &_compilation_id);
1297 if (CIStart <= id && id < CIStop) {
1298 return id;
1299 }
1300 }
1301
1302 // Method was not in the appropriate compilation range.
1303 method->set_not_compilable_quietly();
1304 return 0;
1305 #else
1306 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1307 // only _compilation_id is incremented.
1308 return Atomic::add(1, &_compilation_id);
1309 #endif
1310 }
1311
1312 // ------------------------------------------------------------------
1313 // CompileBroker::assign_compile_id_unlocked
1314 //
1315 // Public wrapper for assign_compile_id that acquires the needed locks
1316 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1317 MutexLocker locker(MethodCompileQueue_lock, thread);
1318 return assign_compile_id(method, osr_bci);
1319 }
1320
1321 // ------------------------------------------------------------------
1322 // CompileBroker::preload_classes
1323 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1324 // Move this code over from c1_Compiler.cpp
1325 ShouldNotReachHere();
1326 }
1327
1328
1329 // ------------------------------------------------------------------
1330 // CompileBroker::create_compile_task
1331 //
1332 // Create a CompileTask object representing the current request for
1333 // compilation. Add this task to the queue.
1334 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1335 int compile_id,
1336 const methodHandle& method,
1337 int osr_bci,
1338 int comp_level,
1339 const methodHandle& hot_method,
1340 int hot_count,
1341 CompileTask::CompileReason compile_reason,
1342 bool blocking) {
1343 CompileTask* new_task = CompileTask::allocate();
1344 new_task->initialize(compile_id, method, osr_bci, comp_level,
1345 hot_method, hot_count, compile_reason,
1346 blocking);
1347 queue->add(new_task);
1348 return new_task;
1349 }
1350
1351 #if INCLUDE_JVMCI
1352 // The number of milliseconds to wait before checking if
1353 // JVMCI compilation has made progress.
1354 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1355
1356 // The number of JVMCI compilation progress checks that must fail
1357 // before unblocking a thread waiting for a blocking compilation.
1358 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1359
1360 /**
1361 * Waits for a JVMCI compiler to complete a given task. This thread
1362 * waits until either the task completes or it sees no JVMCI compilation
1363 * progress for N consecutive milliseconds where N is
1364 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1365 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1366 *
1367 * @return true if this thread needs to free/recycle the task
1368 */
1369 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1370 MutexLocker waiter(task->lock(), thread);
1371 int progress_wait_attempts = 0;
1372 int methods_compiled = jvmci->methods_compiled();
1373 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1374 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1375 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1376
1377 bool progress;
1378 if (jvmci_compiler_thread != NULL) {
1379 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1380 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1381 } else {
1382 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1383 // that all JVMCI compiler threads are blocked on. We use the counter for
1384 // successful JVMCI compilations to determine whether JVMCI compilation
1385 // is still making progress through the JVMCI compiler queue.
1386 progress = jvmci->methods_compiled() != methods_compiled;
1387 }
1388
1389 if (!progress) {
1390 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1391 if (PrintCompilation) {
1392 task->print(tty, "wait for blocking compilation timed out");
1393 }
1394 break;
1395 }
1396 } else {
1397 progress_wait_attempts = 0;
1398 if (jvmci_compiler_thread == NULL) {
1399 methods_compiled = jvmci->methods_compiled();
1400 }
1401 }
1402 }
1403 task->clear_waiter();
1404 return task->is_complete();
1405 }
1406 #endif
1407
1408 /**
1409 * Wait for the compilation task to complete.
1410 */
1411 void CompileBroker::wait_for_completion(CompileTask* task) {
1412 if (CIPrintCompileQueue) {
1413 ttyLocker ttyl;
1414 tty->print_cr("BLOCKING FOR COMPILE");
1415 }
1416
1417 assert(task->is_blocking(), "can only wait on blocking task");
1418
1419 JavaThread* thread = JavaThread::current();
1420 thread->set_blocked_on_compilation(true);
1421
1422 methodHandle method(thread, task->method());
1423 bool free_task;
1424 #if INCLUDE_JVMCI
1425 AbstractCompiler* comp = compiler(task->comp_level());
1426 if (comp->is_jvmci()) {
1427 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1428 } else
1429 #endif
1430 {
1431 MutexLocker waiter(task->lock(), thread);
1432 free_task = true;
1433 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1434 task->lock()->wait();
1435 }
1436 }
1437
1438 thread->set_blocked_on_compilation(false);
1439 if (free_task) {
1440 if (is_compilation_disabled_forever()) {
1441 CompileTask::free(task);
1442 return;
1443 }
1444
1445 // It is harmless to check this status without the lock, because
1446 // completion is a stable property (until the task object is recycled).
1447 assert(task->is_complete(), "Compilation should have completed");
1448 assert(task->code_handle() == NULL, "must be reset");
1449
1450 // By convention, the waiter is responsible for recycling a
1451 // blocking CompileTask. Since there is only one waiter ever
1452 // waiting on a CompileTask, we know that no one else will
1453 // be using this CompileTask; we can free it.
1454 CompileTask::free(task);
1455 }
1456 }
1457
1458 /**
1459 * Initialize compiler thread(s) + compiler object(s). The postcondition
1460 * of this function is that the compiler runtimes are initialized and that
1461 * compiler threads can start compiling.
1462 */
1463 bool CompileBroker::init_compiler_runtime() {
1464 CompilerThread* thread = CompilerThread::current();
1465 AbstractCompiler* comp = thread->compiler();
1466 // Final sanity check - the compiler object must exist
1467 guarantee(comp != NULL, "Compiler object must exist");
1468
1469 int system_dictionary_modification_counter;
1470 {
1471 MutexLocker locker(Compile_lock, thread);
1472 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1473 }
1474
1475 {
1476 // Must switch to native to allocate ci_env
1477 ThreadToNativeFromVM ttn(thread);
1478 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1479 // Cache Jvmti state
1480 ci_env.cache_jvmti_state();
1481 // Cache DTrace flags
1482 ci_env.cache_dtrace_flags();
1483
1484 // Switch back to VM state to do compiler initialization
1485 ThreadInVMfromNative tv(thread);
1486 ResetNoHandleMark rnhm;
1487
1488 if (!comp->is_shark()) {
1489 // Perform per-thread and global initializations
1490 comp->initialize();
1491 }
1492 }
1493
1494 if (comp->is_failed()) {
1495 disable_compilation_forever();
1496 // If compiler initialization failed, no compiler thread that is specific to a
1497 // particular compiler runtime will ever start to compile methods.
1498 shutdown_compiler_runtime(comp, thread);
1499 return false;
1500 }
1501
1502 // C1 specific check
1503 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1504 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1505 return false;
1506 }
1507
1508 return true;
1509 }
1510
1511 /**
1512 * If C1 and/or C2 initialization failed, we shut down all compilation.
1513 * We do this to keep things simple. This can be changed if it ever turns
1514 * out to be a problem.
1515 */
1516 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1517 // Free buffer blob, if allocated
1518 if (thread->get_buffer_blob() != NULL) {
1519 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1520 CodeCache::free(thread->get_buffer_blob());
1521 }
1522
1523 if (comp->should_perform_shutdown()) {
1524 // There are two reasons for shutting down the compiler
1525 // 1) compiler runtime initialization failed
1526 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1527 warning("%s initialization failed. Shutting down all compilers", comp->name());
1528
1529 // Only one thread per compiler runtime object enters here
1530 // Set state to shut down
1531 comp->set_shut_down();
1532
1533 // Delete all queued compilation tasks to make compiler threads exit faster.
1534 if (_c1_compile_queue != NULL) {
1535 _c1_compile_queue->free_all();
1536 }
1537
1538 if (_c2_compile_queue != NULL) {
1539 _c2_compile_queue->free_all();
1540 }
1541
1542 // Set flags so that we continue execution with using interpreter only.
1543 UseCompiler = false;
1544 UseInterpreter = true;
1545
1546 // We could delete compiler runtimes also. However, there are references to
1547 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1548 // fail. This can be done later if necessary.
1549 }
1550 }
1551
1552 // ------------------------------------------------------------------
1553 // CompileBroker::compiler_thread_loop
1554 //
1555 // The main loop run by a CompilerThread.
1556 void CompileBroker::compiler_thread_loop() {
1557 CompilerThread* thread = CompilerThread::current();
1558 CompileQueue* queue = thread->queue();
1559 // For the thread that initializes the ciObjectFactory
1560 // this resource mark holds all the shared objects
1561 ResourceMark rm;
1562
1563 // First thread to get here will initialize the compiler interface
1564
1565 {
1566 ASSERT_IN_VM;
1567 MutexLocker only_one (CompileThread_lock, thread);
1568 if (!ciObjectFactory::is_initialized()) {
1569 ciObjectFactory::initialize();
1570 }
1571 }
1572
1573 // Open a log.
1574 if (LogCompilation) {
1575 init_compiler_thread_log();
1576 }
1577 CompileLog* log = thread->log();
1578 if (log != NULL) {
1579 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1580 thread->name(),
1581 os::current_thread_id(),
1582 os::current_process_id());
1583 log->stamp();
1584 log->end_elem();
1585 }
1586
1587 // If compiler thread/runtime initialization fails, exit the compiler thread
1588 if (!init_compiler_runtime()) {
1589 return;
1590 }
1591
1592 // Poll for new compilation tasks as long as the JVM runs. Compilation
1593 // should only be disabled if something went wrong while initializing the
1594 // compiler runtimes. This, in turn, should not happen. The only known case
1595 // when compiler runtime initialization fails is if there is not enough free
1596 // space in the code cache to generate the necessary stubs, etc.
1597 while (!is_compilation_disabled_forever()) {
1598 // We need this HandleMark to avoid leaking VM handles.
1599 HandleMark hm(thread);
1600
1601 CompileTask* task = queue->get();
1602 if (task == NULL) {
1603 continue;
1604 }
1605
1606 // Give compiler threads an extra quanta. They tend to be bursty and
1607 // this helps the compiler to finish up the job.
1608 if (CompilerThreadHintNoPreempt) {
1609 os::hint_no_preempt();
1610 }
1611
1612 // Assign the task to the current thread. Mark this compilation
1613 // thread as active for the profiler.
1614 CompileTaskWrapper ctw(task);
1615 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1616 task->set_code_handle(&result_handle);
1617 methodHandle method(thread, task->method());
1618
1619 // Never compile a method if breakpoints are present in it
1620 if (method()->number_of_breakpoints() == 0) {
1621 // Compile the method.
1622 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1623 invoke_compiler_on_method(task);
1624 } else {
1625 // After compilation is disabled, remove remaining methods from queue
1626 method->clear_queued_for_compilation();
1627 task->set_failure_reason("compilation is disabled");
1628 }
1629 }
1630 }
1631
1632 // Shut down compiler runtime
1633 shutdown_compiler_runtime(thread->compiler(), thread);
1634 }
1635
1636 // ------------------------------------------------------------------
1637 // CompileBroker::init_compiler_thread_log
1638 //
1639 // Set up state required by +LogCompilation.
1640 void CompileBroker::init_compiler_thread_log() {
1641 CompilerThread* thread = CompilerThread::current();
1642 char file_name[4*K];
1643 FILE* fp = NULL;
1644 intx thread_id = os::current_thread_id();
1645 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1646 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1647 if (dir == NULL) {
1648 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1649 thread_id, os::current_process_id());
1650 } else {
1651 jio_snprintf(file_name, sizeof(file_name),
1652 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1653 os::file_separator(), thread_id, os::current_process_id());
1654 }
1655
1656 fp = fopen(file_name, "wt");
1657 if (fp != NULL) {
1658 if (LogCompilation && Verbose) {
1659 tty->print_cr("Opening compilation log %s", file_name);
1660 }
1661 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1662 if (log == NULL) {
1663 fclose(fp);
1664 return;
1665 }
1666 thread->init_log(log);
1667
1668 if (xtty != NULL) {
1669 ttyLocker ttyl;
1670 // Record any per thread log files
1671 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1672 }
1673 return;
1674 }
1675 }
1676 warning("Cannot open log file: %s", file_name);
1677 }
1678
1679 void CompileBroker::log_metaspace_failure() {
1680 const char* message = "some methods may not be compiled because metaspace "
1681 "is out of memory";
1682 if (_compilation_log != NULL) {
1683 _compilation_log->log_metaspace_failure(message);
1684 }
1685 if (PrintCompilation) {
1686 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1687 }
1688 }
1689
1690
1691 // ------------------------------------------------------------------
1692 // CompileBroker::set_should_block
1693 //
1694 // Set _should_block.
1695 // Call this from the VM, with Threads_lock held and a safepoint requested.
1696 void CompileBroker::set_should_block() {
1697 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1698 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1699 #ifndef PRODUCT
1700 if (PrintCompilation && (Verbose || WizardMode))
1701 tty->print_cr("notifying compiler thread pool to block");
1702 #endif
1703 _should_block = true;
1704 }
1705
1706 // ------------------------------------------------------------------
1707 // CompileBroker::maybe_block
1708 //
1709 // Call this from the compiler at convenient points, to poll for _should_block.
1710 void CompileBroker::maybe_block() {
1711 if (_should_block) {
1712 #ifndef PRODUCT
1713 if (PrintCompilation && (Verbose || WizardMode))
1714 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1715 #endif
1716 ThreadInVMfromNative tivfn(JavaThread::current());
1717 }
1718 }
1719
1720 // wrapper for CodeCache::print_summary()
1721 static void codecache_print(bool detailed)
1722 {
1723 ResourceMark rm;
1724 stringStream s;
1725 // Dump code cache into a buffer before locking the tty,
1726 {
1727 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1728 CodeCache::print_summary(&s, detailed);
1729 }
1730 ttyLocker ttyl;
1731 tty->print("%s", s.as_string());
1732 }
1733
1734 // wrapper for CodeCache::print_summary() using outputStream
1735 static void codecache_print(outputStream* out, bool detailed) {
1736 ResourceMark rm;
1737 stringStream s;
1738
1739 // Dump code cache into a buffer
1740 {
1741 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1742 CodeCache::print_summary(&s, detailed);
1743 }
1744
1745 char* remaining_log = s.as_string();
1746 while (*remaining_log != '\0') {
1747 char* eol = strchr(remaining_log, '\n');
1748 if (eol == NULL) {
1749 out->print_cr("%s", remaining_log);
1750 remaining_log = remaining_log + strlen(remaining_log);
1751 } else {
1752 *eol = '\0';
1753 out->print_cr("%s", remaining_log);
1754 remaining_log = eol + 1;
1755 }
1756 }
1757 }
1758
1759 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1760
1761 if (success) {
1762 task->mark_success();
1763 if (ci_env != NULL) {
1764 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1765 }
1766 if (_compilation_log != NULL) {
1767 nmethod* code = task->code();
1768 if (code != NULL) {
1769 _compilation_log->log_nmethod(thread, code);
1770 }
1771 }
1772 }
1773
1774 // simulate crash during compilation
1775 assert(task->compile_id() != CICrashAt, "just as planned");
1776 if (event.should_commit()) {
1777 event.set_method(task->method());
1778 event.set_compileId(task->compile_id());
1779 event.set_compileLevel(task->comp_level());
1780 event.set_succeded(task->is_success());
1781 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1782 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1783 event.set_inlinedBytes(task->num_inlined_bytecodes());
1784 event.commit();
1785 }
1786 }
1787
1788 int DirectivesStack::_depth = 0;
1789 CompilerDirectives* DirectivesStack::_top = NULL;
1790 CompilerDirectives* DirectivesStack::_bottom = NULL;
1791
1792 // ------------------------------------------------------------------
1793 // CompileBroker::invoke_compiler_on_method
1794 //
1795 // Compile a method.
1796 //
1797 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1798 task->print_ul();
1799 if (PrintCompilation) {
1800 ResourceMark rm;
1801 task->print_tty();
1802 }
1803 elapsedTimer time;
1804
1805 CompilerThread* thread = CompilerThread::current();
1806 ResourceMark rm(thread);
1807
1808 if (LogEvents) {
1809 _compilation_log->log_compile(thread, task);
1810 }
1811
1812 // Common flags.
1813 uint compile_id = task->compile_id();
1814 int osr_bci = task->osr_bci();
1815 bool is_osr = (osr_bci != standard_entry_bci);
1816 bool should_log = (thread->log() != NULL);
1817 bool should_break = false;
1818 const int task_level = task->comp_level();
1819 AbstractCompiler* comp = task->compiler();
1820
1821 DirectiveSet* directive;
1822 {
1823 // create the handle inside it's own block so it can't
1824 // accidentally be referenced once the thread transitions to
1825 // native. The NoHandleMark before the transition should catch
1826 // any cases where this occurs in the future.
1827 methodHandle method(thread, task->method());
1828 assert(!method->is_native(), "no longer compile natives");
1829
1830 // Look up matching directives
1831 directive = DirectivesStack::getMatchingDirective(method, comp);
1832
1833 // Save information about this method in case of failure.
1834 set_last_compile(thread, method, is_osr, task_level);
1835
1836 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1837 }
1838
1839 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1840 if (should_log && !directive->LogOption) {
1841 should_log = false;
1842 }
1843
1844 // Allocate a new set of JNI handles.
1845 push_jni_handle_block();
1846 Method* target_handle = task->method();
1847 int compilable = ciEnv::MethodCompilable;
1848 const char* failure_reason = NULL;
1849 const char* retry_message = NULL;
1850
1851 int system_dictionary_modification_counter;
1852 {
1853 MutexLocker locker(Compile_lock, thread);
1854 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1855 }
1856
1857 #if INCLUDE_JVMCI
1858 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1859 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1860
1861 TraceTime t1("compilation", &time);
1862 EventCompilation event;
1863
1864 JVMCIEnv env(task, system_dictionary_modification_counter);
1865 methodHandle method(thread, target_handle);
1866 jvmci->compile_method(method, osr_bci, &env);
1867
1868 post_compile(thread, task, event, task->code() != NULL, NULL);
1869
1870 failure_reason = env.failure_reason();
1871 if (!env.retryable()) {
1872 retry_message = "not retryable";
1873 compilable = ciEnv::MethodCompilable_not_at_tier;
1874 }
1875
1876 } else
1877 #endif // INCLUDE_JVMCI
1878 {
1879 NoHandleMark nhm;
1880 ThreadToNativeFromVM ttn(thread);
1881
1882 ciEnv ci_env(task, system_dictionary_modification_counter);
1883 if (should_break) {
1884 ci_env.set_break_at_compile(true);
1885 }
1886 if (should_log) {
1887 ci_env.set_log(thread->log());
1888 }
1889 assert(thread->env() == &ci_env, "set by ci_env");
1890 // The thread-env() field is cleared in ~CompileTaskWrapper.
1891
1892 // Cache Jvmti state
1893 ci_env.cache_jvmti_state();
1894
1895 // Cache DTrace flags
1896 ci_env.cache_dtrace_flags();
1897
1898 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1899
1900 TraceTime t1("compilation", &time);
1901 EventCompilation event;
1902
1903 if (comp == NULL) {
1904 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1905 } else {
1906 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1907 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1908 while (WhiteBox::compilation_locked) {
1909 locker.wait(Mutex::_no_safepoint_check_flag);
1910 }
1911 }
1912 comp->compile_method(&ci_env, target, osr_bci, directive);
1913 }
1914
1915 if (!ci_env.failing() && task->code() == NULL) {
1916 //assert(false, "compiler should always document failure");
1917 // The compiler elected, without comment, not to register a result.
1918 // Do not attempt further compilations of this method.
1919 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1920 }
1921
1922 // Copy this bit to the enclosing block:
1923 compilable = ci_env.compilable();
1924
1925 if (ci_env.failing()) {
1926 failure_reason = ci_env.failure_reason();
1927 retry_message = ci_env.retry_message();
1928 ci_env.report_failure(failure_reason);
1929 }
1930
1931 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1932 }
1933 // Remove the JNI handle block after the ciEnv destructor has run in
1934 // the previous block.
1935 pop_jni_handle_block();
1936
1937 if (failure_reason != NULL) {
1938 task->set_failure_reason(failure_reason);
1939 if (_compilation_log != NULL) {
1940 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1941 }
1942 if (PrintCompilation) {
1943 FormatBufferResource msg = retry_message != NULL ?
1944 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1945 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1946 task->print(tty, msg);
1947 }
1948 }
1949
1950 methodHandle method(thread, task->method());
1951
1952 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1953
1954 collect_statistics(thread, time, task);
1955
1956 nmethod* nm = task->code();
1957 if (nm != NULL) {
1958 nm->maybe_print_nmethod(directive);
1959 }
1960 DirectivesStack::release(directive);
1961
1962 if (PrintCompilation && PrintCompilation2) {
1963 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1964 tty->print("%4d ", compile_id); // print compilation number
1965 tty->print("%s ", (is_osr ? "%" : " "));
1966 if (task->code() != NULL) {
1967 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1968 }
1969 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1970 }
1971
1972 Log(compilation, codecache) log;
1973 if (log.is_debug()) {
1974 LogStream ls(log.debug());
1975 codecache_print(&ls, /* detailed= */ false);
1976 }
1977 if (PrintCodeCacheOnCompilation) {
1978 codecache_print(/* detailed= */ false);
1979 }
1980 // Disable compilation, if required.
1981 switch (compilable) {
1982 case ciEnv::MethodCompilable_never:
1983 if (is_osr)
1984 method->set_not_osr_compilable_quietly();
1985 else
1986 method->set_not_compilable_quietly();
1987 break;
1988 case ciEnv::MethodCompilable_not_at_tier:
1989 if (is_osr)
1990 method->set_not_osr_compilable_quietly(task_level);
1991 else
1992 method->set_not_compilable_quietly(task_level);
1993 break;
1994 }
1995
1996 // Note that the queued_for_compilation bits are cleared without
1997 // protection of a mutex. [They were set by the requester thread,
1998 // when adding the task to the compile queue -- at which time the
1999 // compile queue lock was held. Subsequently, we acquired the compile
2000 // queue lock to get this task off the compile queue; thus (to belabour
2001 // the point somewhat) our clearing of the bits must be occurring
2002 // only after the setting of the bits. See also 14012000 above.
2003 method->clear_queued_for_compilation();
2004
2005 #ifdef ASSERT
2006 if (CollectedHeap::fired_fake_oom()) {
2007 // The current compile received a fake OOM during compilation so
2008 // go ahead and exit the VM since the test apparently succeeded
2009 tty->print_cr("*** Shutting down VM after successful fake OOM");
2010 vm_exit(0);
2011 }
2012 #endif
2013 }
2014
2015 /**
2016 * The CodeCache is full. Print warning and disable compilation.
2017 * Schedule code cache cleaning so compilation can continue later.
2018 * This function needs to be called only from CodeCache::allocate(),
2019 * since we currently handle a full code cache uniformly.
2020 */
2021 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2022 UseInterpreter = true;
2023 if (UseCompiler || AlwaysCompileLoopMethods ) {
2024 if (xtty != NULL) {
2025 ResourceMark rm;
2026 stringStream s;
2027 // Dump code cache state into a buffer before locking the tty,
2028 // because log_state() will use locks causing lock conflicts.
2029 CodeCache::log_state(&s);
2030 // Lock to prevent tearing
2031 ttyLocker ttyl;
2032 xtty->begin_elem("code_cache_full");
2033 xtty->print("%s", s.as_string());
2034 xtty->stamp();
2035 xtty->end_elem();
2036 }
2037
2038 #ifndef PRODUCT
2039 if (CompileTheWorld || ExitOnFullCodeCache) {
2040 codecache_print(/* detailed= */ true);
2041 before_exit(JavaThread::current());
2042 exit_globals(); // will delete tty
2043 vm_direct_exit(CompileTheWorld ? 0 : 1);
2044 }
2045 #endif
2046 if (UseCodeCacheFlushing) {
2047 // Since code cache is full, immediately stop new compiles
2048 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2049 NMethodSweeper::log_sweep("disable_compiler");
2050 }
2051 } else {
2052 disable_compilation_forever();
2053 }
2054
2055 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2056 }
2057 }
2058
2059 // ------------------------------------------------------------------
2060 // CompileBroker::set_last_compile
2061 //
2062 // Record this compilation for debugging purposes.
2063 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2064 ResourceMark rm;
2065 char* method_name = method->name()->as_C_string();
2066 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2067 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2068 char current_method[CompilerCounters::cmname_buffer_length];
2069 size_t maxLen = CompilerCounters::cmname_buffer_length;
2070
2071 if (UsePerfData) {
2072 const char* class_name = method->method_holder()->name()->as_C_string();
2073
2074 size_t s1len = strlen(class_name);
2075 size_t s2len = strlen(method_name);
2076
2077 // check if we need to truncate the string
2078 if (s1len + s2len + 2 > maxLen) {
2079
2080 // the strategy is to lop off the leading characters of the
2081 // class name and the trailing characters of the method name.
2082
2083 if (s2len + 2 > maxLen) {
2084 // lop of the entire class name string, let snprintf handle
2085 // truncation of the method name.
2086 class_name += s1len; // null string
2087 }
2088 else {
2089 // lop off the extra characters from the front of the class name
2090 class_name += ((s1len + s2len + 2) - maxLen);
2091 }
2092 }
2093
2094 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2095 }
2096
2097 if (CICountOSR && is_osr) {
2098 _last_compile_type = osr_compile;
2099 } else {
2100 _last_compile_type = normal_compile;
2101 }
2102 _last_compile_level = comp_level;
2103
2104 if (UsePerfData) {
2105 CompilerCounters* counters = thread->counters();
2106 counters->set_current_method(current_method);
2107 counters->set_compile_type((jlong)_last_compile_type);
2108 }
2109 }
2110
2111
2112 // ------------------------------------------------------------------
2113 // CompileBroker::push_jni_handle_block
2114 //
2115 // Push on a new block of JNI handles.
2116 void CompileBroker::push_jni_handle_block() {
2117 JavaThread* thread = JavaThread::current();
2118
2119 // Allocate a new block for JNI handles.
2120 // Inlined code from jni_PushLocalFrame()
2121 JNIHandleBlock* java_handles = thread->active_handles();
2122 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2123 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2124 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2125 thread->set_active_handles(compile_handles);
2126 }
2127
2128
2129 // ------------------------------------------------------------------
2130 // CompileBroker::pop_jni_handle_block
2131 //
2132 // Pop off the current block of JNI handles.
2133 void CompileBroker::pop_jni_handle_block() {
2134 JavaThread* thread = JavaThread::current();
2135
2136 // Release our JNI handle block
2137 JNIHandleBlock* compile_handles = thread->active_handles();
2138 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2139 thread->set_active_handles(java_handles);
2140 compile_handles->set_pop_frame_link(NULL);
2141 JNIHandleBlock::release_block(compile_handles, thread); // may block
2142 }
2143
2144 // ------------------------------------------------------------------
2145 // CompileBroker::collect_statistics
2146 //
2147 // Collect statistics about the compilation.
2148
2149 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2150 bool success = task->is_success();
2151 methodHandle method (thread, task->method());
2152 uint compile_id = task->compile_id();
2153 bool is_osr = (task->osr_bci() != standard_entry_bci);
2154 nmethod* code = task->code();
2155 CompilerCounters* counters = thread->counters();
2156
2157 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2158 MutexLocker locker(CompileStatistics_lock);
2159
2160 // _perf variables are production performance counters which are
2161 // updated regardless of the setting of the CITime and CITimeEach flags
2162 //
2163
2164 // account all time, including bailouts and failures in this counter;
2165 // C1 and C2 counters are counting both successful and unsuccessful compiles
2166 _t_total_compilation.add(time);
2167
2168 if (!success) {
2169 _total_bailout_count++;
2170 if (UsePerfData) {
2171 _perf_last_failed_method->set_value(counters->current_method());
2172 _perf_last_failed_type->set_value(counters->compile_type());
2173 _perf_total_bailout_count->inc();
2174 }
2175 _t_bailedout_compilation.add(time);
2176 } else if (code == NULL) {
2177 if (UsePerfData) {
2178 _perf_last_invalidated_method->set_value(counters->current_method());
2179 _perf_last_invalidated_type->set_value(counters->compile_type());
2180 _perf_total_invalidated_count->inc();
2181 }
2182 _total_invalidated_count++;
2183 _t_invalidated_compilation.add(time);
2184 } else {
2185 // Compilation succeeded
2186
2187 // update compilation ticks - used by the implementation of
2188 // java.lang.management.CompilationMBean
2189 _perf_total_compilation->inc(time.ticks());
2190 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2191
2192 if (CITime) {
2193 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2194 if (is_osr) {
2195 _t_osr_compilation.add(time);
2196 _sum_osr_bytes_compiled += bytes_compiled;
2197 } else {
2198 _t_standard_compilation.add(time);
2199 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2200 }
2201
2202 #if INCLUDE_JVMCI
2203 AbstractCompiler* comp = compiler(task->comp_level());
2204 if (comp) {
2205 CompilerStatistics* stats = comp->stats();
2206 if (stats) {
2207 if (is_osr) {
2208 stats->_osr.update(time, bytes_compiled);
2209 } else {
2210 stats->_standard.update(time, bytes_compiled);
2211 }
2212 stats->_nmethods_size += code->total_size();
2213 stats->_nmethods_code_size += code->insts_size();
2214 } else { // if (!stats)
2215 assert(false, "Compiler statistics object must exist");
2216 }
2217 } else { // if (!comp)
2218 assert(false, "Compiler object must exist");
2219 }
2220 #endif // INCLUDE_JVMCI
2221 }
2222
2223 if (UsePerfData) {
2224 // save the name of the last method compiled
2225 _perf_last_method->set_value(counters->current_method());
2226 _perf_last_compile_type->set_value(counters->compile_type());
2227 _perf_last_compile_size->set_value(method->code_size() +
2228 task->num_inlined_bytecodes());
2229 if (is_osr) {
2230 _perf_osr_compilation->inc(time.ticks());
2231 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2232 } else {
2233 _perf_standard_compilation->inc(time.ticks());
2234 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2235 }
2236 }
2237
2238 if (CITimeEach) {
2239 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2240 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2241 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2242 }
2243
2244 // Collect counts of successful compilations
2245 _sum_nmethod_size += code->total_size();
2246 _sum_nmethod_code_size += code->insts_size();
2247 _total_compile_count++;
2248
2249 if (UsePerfData) {
2250 _perf_sum_nmethod_size->inc( code->total_size());
2251 _perf_sum_nmethod_code_size->inc(code->insts_size());
2252 _perf_total_compile_count->inc();
2253 }
2254
2255 if (is_osr) {
2256 if (UsePerfData) _perf_total_osr_compile_count->inc();
2257 _total_osr_compile_count++;
2258 } else {
2259 if (UsePerfData) _perf_total_standard_compile_count->inc();
2260 _total_standard_compile_count++;
2261 }
2262 }
2263 // set the current method for the thread to null
2264 if (UsePerfData) counters->set_current_method("");
2265 }
2266
2267 const char* CompileBroker::compiler_name(int comp_level) {
2268 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2269 if (comp == NULL) {
2270 return "no compiler";
2271 } else {
2272 return (comp->name());
2273 }
2274 }
2275
2276 #if INCLUDE_JVMCI
2277 void CompileBroker::print_times(AbstractCompiler* comp) {
2278 CompilerStatistics* stats = comp->stats();
2279 if (stats) {
2280 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}",
2281 comp->name(), stats->bytes_per_second(),
2282 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2283 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2284 stats->_nmethods_size, stats->_nmethods_code_size);
2285 } else { // if (!stats)
2286 assert(false, "Compiler statistics object must exist");
2287 }
2288 comp->print_timers();
2289 }
2290 #endif // INCLUDE_JVMCI
2291
2292 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2293 #if INCLUDE_JVMCI
2294 elapsedTimer standard_compilation;
2295 elapsedTimer total_compilation;
2296 elapsedTimer osr_compilation;
2297
2298 int standard_bytes_compiled = 0;
2299 int osr_bytes_compiled = 0;
2300
2301 int standard_compile_count = 0;
2302 int osr_compile_count = 0;
2303 int total_compile_count = 0;
2304
2305 int nmethods_size = 0;
2306 int nmethods_code_size = 0;
2307 bool printedHeader = false;
2308
2309 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2310 AbstractCompiler* comp = _compilers[i];
2311 if (comp != NULL) {
2312 if (per_compiler && aggregate && !printedHeader) {
2313 printedHeader = true;
2314 tty->cr();
2315 tty->print_cr("Individual compiler times (for compiled methods only)");
2316 tty->print_cr("------------------------------------------------");
2317 tty->cr();
2318 }
2319 CompilerStatistics* stats = comp->stats();
2320
2321 if (stats) {
2322 standard_compilation.add(stats->_standard._time);
2323 osr_compilation.add(stats->_osr._time);
2324
2325 standard_bytes_compiled += stats->_standard._bytes;
2326 osr_bytes_compiled += stats->_osr._bytes;
2327
2328 standard_compile_count += stats->_standard._count;
2329 osr_compile_count += stats->_osr._count;
2330
2331 nmethods_size += stats->_nmethods_size;
2332 nmethods_code_size += stats->_nmethods_code_size;
2333 } else { // if (!stats)
2334 assert(false, "Compiler statistics object must exist");
2335 }
2336
2337 if (per_compiler) {
2338 print_times(comp);
2339 }
2340 }
2341 }
2342 total_compile_count = osr_compile_count + standard_compile_count;
2343 total_compilation.add(osr_compilation);
2344 total_compilation.add(standard_compilation);
2345
2346 // In hosted mode, print the JVMCI compiler specific counters manually.
2347 if (!UseJVMCICompiler) {
2348 JVMCICompiler::print_compilation_timers();
2349 }
2350 #else // INCLUDE_JVMCI
2351 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2352 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2353 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2354
2355 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2356 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2357
2358 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2359 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2360 int total_compile_count = CompileBroker::_total_compile_count;
2361
2362 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2363 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2364 #endif // INCLUDE_JVMCI
2365
2366 if (!aggregate) {
2367 return;
2368 }
2369 tty->cr();
2370 tty->print_cr("Accumulated compiler times");
2371 tty->print_cr("----------------------------------------------------------");
2372 //0000000000111111111122222222223333333333444444444455555555556666666666
2373 //0123456789012345678901234567890123456789012345678901234567890123456789
2374 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2375 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2376 standard_compilation.seconds(),
2377 standard_compilation.seconds() / standard_compile_count);
2378 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2379 CompileBroker::_t_bailedout_compilation.seconds(),
2380 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2381 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2382 osr_compilation.seconds(),
2383 osr_compilation.seconds() / osr_compile_count);
2384 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2385 CompileBroker::_t_invalidated_compilation.seconds(),
2386 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2387
2388 AbstractCompiler *comp = compiler(CompLevel_simple);
2389 if (comp != NULL) {
2390 tty->cr();
2391 comp->print_timers();
2392 }
2393 comp = compiler(CompLevel_full_optimization);
2394 if (comp != NULL) {
2395 tty->cr();
2396 comp->print_timers();
2397 }
2398 tty->cr();
2399 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2400 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2401 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2402 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2403 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2404 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2405 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2406 double tcs = total_compilation.seconds();
2407 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2408 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2409 tty->cr();
2410 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2411 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2412 }
2413
2414 // Debugging output for failure
2415 void CompileBroker::print_last_compile() {
2416 if (_last_compile_level != CompLevel_none &&
2417 compiler(_last_compile_level) != NULL &&
2418 _last_compile_type != no_compile) {
2419 if (_last_compile_type == osr_compile) {
2420 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2421 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2422 } else {
2423 tty->print_cr("Last parse: %d+++(%d) %s",
2424 _compilation_id, _last_compile_level, _last_method_compiled);
2425 }
2426 }
2427 }