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