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