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 "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/dependencyContext.hpp"
32 #include "compiler/compileBroker.hpp"
33 #include "compiler/compileLog.hpp"
34 #include "compiler/compilerOracle.hpp"
35 #include "compiler/directivesParser.hpp"
36 #include "interpreter/linkResolver.hpp"
37 #include "logging/log.hpp"
38 #include "logging/logStream.hpp"
39 #include "memory/allocation.inline.hpp"
40 #include "memory/resourceArea.hpp"
41 #include "oops/methodData.hpp"
42 #include "oops/method.hpp"
43 #include "oops/oop.inline.hpp"
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 int 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 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
789 }
790
791 for (int i = c2_compiler_count; i < compiler_count; i++) {
792 // Create a name for our thread.
793 sprintf(name_buffer, "C1 CompilerThread%d", i);
794 CompilerCounters* counters = new CompilerCounters();
795 // C1
796 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
797 }
798
799 if (UsePerfData) {
800 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
801 }
802
803 if (MethodFlushing) {
804 // Initialize the sweeper thread
805 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
806 }
807 }
808
809
810 /**
811 * Set the methods on the stack as on_stack so that redefine classes doesn't
812 * reclaim them. This method is executed at a safepoint.
813 */
814 void CompileBroker::mark_on_stack() {
815 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
816 // Since we are at a safepoint, we do not need a lock to access
817 // the compile queues.
818 if (_c2_compile_queue != NULL) {
819 _c2_compile_queue->mark_on_stack();
820 }
821 if (_c1_compile_queue != NULL) {
822 _c1_compile_queue->mark_on_stack();
823 }
824 }
825
826 // ------------------------------------------------------------------
827 // CompileBroker::compile_method
828 //
829 // Request compilation of a method.
830 void CompileBroker::compile_method_base(const methodHandle& method,
831 int osr_bci,
832 int comp_level,
833 const methodHandle& hot_method,
834 int hot_count,
835 CompileTask::CompileReason compile_reason,
836 bool blocking,
837 Thread* thread) {
838 guarantee(!method->is_abstract(), "cannot compile abstract methods");
839 assert(method->method_holder()->is_instance_klass(),
840 "sanity check");
841 assert(!method->method_holder()->is_not_initialized(),
842 "method holder must be initialized");
843 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
844
845 if (CIPrintRequests) {
846 tty->print("request: ");
847 method->print_short_name(tty);
848 if (osr_bci != InvocationEntryBci) {
849 tty->print(" osr_bci: %d", osr_bci);
850 }
851 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
852 if (!hot_method.is_null()) {
853 tty->print(" hot: ");
854 if (hot_method() != method()) {
855 hot_method->print_short_name(tty);
856 } else {
857 tty->print("yes");
858 }
859 }
860 tty->cr();
861 }
862
863 // A request has been made for compilation. Before we do any
864 // real work, check to see if the method has been compiled
865 // in the meantime with a definitive result.
866 if (compilation_is_complete(method, osr_bci, comp_level)) {
867 return;
868 }
869
870 #ifndef PRODUCT
871 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
872 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
873 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
874 return;
875 }
876 }
877 #endif
878
879 // If this method is already in the compile queue, then
880 // we do not block the current thread.
881 if (compilation_is_in_queue(method)) {
882 // We may want to decay our counter a bit here to prevent
883 // multiple denied requests for compilation. This is an
884 // open compilation policy issue. Note: The other possibility,
885 // in the case that this is a blocking compile request, is to have
886 // all subsequent blocking requesters wait for completion of
887 // ongoing compiles. Note that in this case we'll need a protocol
888 // for freeing the associated compile tasks. [Or we could have
889 // a single static monitor on which all these waiters sleep.]
890 return;
891 }
892
893 if (TieredCompilation) {
894 // Tiered policy requires MethodCounters to exist before adding a method to
895 // the queue. Create if we don't have them yet.
896 method->get_method_counters(thread);
897 }
898
899 // Outputs from the following MutexLocker block:
900 CompileTask* task = NULL;
901 CompileQueue* queue = compile_queue(comp_level);
902
903 // Acquire our lock.
904 {
905 MutexLocker locker(MethodCompileQueue_lock, thread);
906
907 // Make sure the method has not slipped into the queues since
908 // last we checked; note that those checks were "fast bail-outs".
909 // Here we need to be more careful, see 14012000 below.
910 if (compilation_is_in_queue(method)) {
911 return;
912 }
913
914 // We need to check again to see if the compilation has
915 // completed. A previous compilation may have registered
916 // some result.
917 if (compilation_is_complete(method, osr_bci, comp_level)) {
918 return;
919 }
920
921 // We now know that this compilation is not pending, complete,
922 // or prohibited. Assign a compile_id to this compilation
923 // and check to see if it is in our [Start..Stop) range.
924 int compile_id = assign_compile_id(method, osr_bci);
925 if (compile_id == 0) {
926 // The compilation falls outside the allowed range.
927 return;
928 }
929
930 #if INCLUDE_JVMCI
931 if (UseJVMCICompiler) {
932 if (blocking) {
933 // Don't allow blocking compiles for requests triggered by JVMCI.
934 if (thread->is_Compiler_thread()) {
935 blocking = false;
936 }
937
938 // Don't allow blocking compiles if inside a class initializer or while performing class loading
939 vframeStream vfst((JavaThread*) thread);
940 for (; !vfst.at_end(); vfst.next()) {
941 if (vfst.method()->is_static_initializer() ||
942 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
943 vfst.method()->name() == vmSymbols::loadClass_name())) {
944 blocking = false;
945 break;
946 }
947 }
948
949 // Don't allow blocking compilation requests to JVMCI
950 // if JVMCI itself is not yet initialized
951 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
952 blocking = false;
953 }
954
955 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
956 // to avoid deadlock between compiler thread(s) and threads run at shutdown
957 // such as the DestroyJavaVM thread.
958 if (JVMCIRuntime::shutdown_called()) {
959 blocking = false;
960 }
961 }
962 }
963 #endif // INCLUDE_JVMCI
964
965 // We will enter the compilation in the queue.
966 // 14012000: Note that this sets the queued_for_compile bits in
967 // the target method. We can now reason that a method cannot be
968 // queued for compilation more than once, as follows:
969 // Before a thread queues a task for compilation, it first acquires
970 // the compile queue lock, then checks if the method's queued bits
971 // are set or it has already been compiled. Thus there can not be two
972 // instances of a compilation task for the same method on the
973 // compilation queue. Consider now the case where the compilation
974 // thread has already removed a task for that method from the queue
975 // and is in the midst of compiling it. In this case, the
976 // queued_for_compile bits must be set in the method (and these
977 // will be visible to the current thread, since the bits were set
978 // under protection of the compile queue lock, which we hold now.
979 // When the compilation completes, the compiler thread first sets
980 // the compilation result and then clears the queued_for_compile
981 // bits. Neither of these actions are protected by a barrier (or done
982 // under the protection of a lock), so the only guarantee we have
983 // (on machines with TSO (Total Store Order)) is that these values
984 // will update in that order. As a result, the only combinations of
985 // these bits that the current thread will see are, in temporal order:
986 // <RESULT, QUEUE> :
987 // <0, 1> : in compile queue, but not yet compiled
988 // <1, 1> : compiled but queue bit not cleared
989 // <1, 0> : compiled and queue bit cleared
990 // Because we first check the queue bits then check the result bits,
991 // we are assured that we cannot introduce a duplicate task.
992 // Note that if we did the tests in the reverse order (i.e. check
993 // result then check queued bit), we could get the result bit before
994 // the compilation completed, and the queue bit after the compilation
995 // completed, and end up introducing a "duplicate" (redundant) task.
996 // In that case, the compiler thread should first check if a method
997 // has already been compiled before trying to compile it.
998 // NOTE: in the event that there are multiple compiler threads and
999 // there is de-optimization/recompilation, things will get hairy,
1000 // and in that case it's best to protect both the testing (here) of
1001 // these bits, and their updating (here and elsewhere) under a
1002 // common lock.
1003 task = create_compile_task(queue,
1004 compile_id, method,
1005 osr_bci, comp_level,
1006 hot_method, hot_count, compile_reason,
1007 blocking);
1008 }
1009
1010 if (blocking) {
1011 wait_for_completion(task);
1012 }
1013 }
1014
1015 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1016 int comp_level,
1017 const methodHandle& hot_method, int hot_count,
1018 CompileTask::CompileReason compile_reason,
1019 Thread* THREAD) {
1020 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1021 if (!_initialized || comp_level == CompLevel_none) {
1022 return NULL;
1023 }
1024
1025 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1026 assert(comp != NULL, "Ensure we have a compiler");
1027
1028 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1029 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1030 DirectivesStack::release(directive);
1031 return nm;
1032 }
1033
1034 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1035 int comp_level,
1036 const methodHandle& hot_method, int hot_count,
1037 CompileTask::CompileReason compile_reason,
1038 DirectiveSet* directive,
1039 Thread* THREAD) {
1040
1041 // make sure arguments make sense
1042 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1043 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1044 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1045 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1046 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1047 // allow any levels for WhiteBox
1048 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1049 // return quickly if possible
1050
1051 // Lambda forms with an Object in their signature can be passed a
1052 // value type. If compiled as root of a compilation, C2 has no way
1053 // to know a value type is passed.
1054 if (ValueTypePassFieldsAsArgs && method->is_compiled_lambda_form()) {
1055 ResourceMark rm;
1056 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) {
1057 if (ss.type() == T_VALUETYPE) {
1058 return NULL;
1059 }
1060 }
1061 }
1062
1063 // Don't compile methods in __Value if value types are disabled
1064 if (!EnableMVT && !EnableValhalla && method->method_holder()->name() == vmSymbols::java_lang____Value()) {
1065 // This may happen with CompileTheWorld, ReplayCompiles or compilations triggered through the WhiteBox API
1066 return NULL;
1067 }
1068
1069 // lock, make sure that the compilation
1070 // isn't prohibited in a straightforward way.
1071 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1072 if (comp == NULL || !comp->can_compile_method(method) ||
1073 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1074 return NULL;
1075 }
1076
1077 #if INCLUDE_JVMCI
1078 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1079 return NULL;
1080 }
1081 #endif
1082
1083 if (osr_bci == InvocationEntryBci) {
1084 // standard compilation
1085 CompiledMethod* method_code = method->code();
1086 if (method_code != NULL && method_code->is_nmethod()) {
1087 if (compilation_is_complete(method, osr_bci, comp_level)) {
1088 return (nmethod*) method_code;
1089 }
1090 }
1091 if (method->is_not_compilable(comp_level)) {
1092 return NULL;
1093 }
1094 } else {
1095 // osr compilation
1096 #ifndef TIERED
1097 // seems like an assert of dubious value
1098 assert(comp_level == CompLevel_highest_tier,
1099 "all OSR compiles are assumed to be at a single compilation level");
1100 #endif // TIERED
1101 // We accept a higher level osr method
1102 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1103 if (nm != NULL) return nm;
1104 if (method->is_not_osr_compilable(comp_level)) return NULL;
1105 }
1106
1107 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1108 // some prerequisites that are compiler specific
1109 if (comp->is_c2()) {
1110 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1111 // Resolve all classes seen in the signature of the method
1112 // we are compiling.
1113 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1114 }
1115
1116 // If the method is native, do the lookup in the thread requesting
1117 // the compilation. Native lookups can load code, which is not
1118 // permitted during compilation.
1119 //
1120 // Note: A native method implies non-osr compilation which is
1121 // checked with an assertion at the entry of this method.
1122 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1123 bool in_base_library;
1124 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1125 if (HAS_PENDING_EXCEPTION) {
1126 // In case of an exception looking up the method, we just forget
1127 // about it. The interpreter will kick-in and throw the exception.
1128 method->set_not_compilable(); // implies is_not_osr_compilable()
1129 CLEAR_PENDING_EXCEPTION;
1130 return NULL;
1131 }
1132 assert(method->has_native_function(), "must have native code by now");
1133 }
1134
1135 // RedefineClasses() has replaced this method; just return
1136 if (method->is_old()) {
1137 return NULL;
1138 }
1139
1140 // JVMTI -- post_compile_event requires jmethod_id() that may require
1141 // a lock the compiling thread can not acquire. Prefetch it here.
1142 if (JvmtiExport::should_post_compiled_method_load()) {
1143 method->jmethod_id();
1144 }
1145
1146 // do the compilation
1147 if (method->is_native()) {
1148 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1149 // The following native methods:
1150 //
1151 // java.lang.Float.intBitsToFloat
1152 // java.lang.Float.floatToRawIntBits
1153 // java.lang.Double.longBitsToDouble
1154 // java.lang.Double.doubleToRawLongBits
1155 //
1156 // are called through the interpreter even if interpreter native stubs
1157 // are not preferred (i.e., calling through adapter handlers is preferred).
1158 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1159 // if the version of the methods from the native libraries is called.
1160 // As the interpreter and the C2-intrinsified version of the methods preserves
1161 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1162 if ((UseSSE >= 1 &&
1163 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1164 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1165 (UseSSE >= 2 &&
1166 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1167 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1168 return NULL;
1169 }
1170
1171 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1172 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1173 //
1174 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1175 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1176 AdapterHandlerLibrary::create_native_wrapper(method);
1177 } else {
1178 return NULL;
1179 }
1180 } else {
1181 // If the compiler is shut off due to code cache getting full
1182 // fail out now so blocking compiles dont hang the java thread
1183 if (!should_compile_new_jobs()) {
1184 CompilationPolicy::policy()->delay_compilation(method());
1185 return NULL;
1186 }
1187 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1188 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1189 }
1190
1191 // return requested nmethod
1192 // We accept a higher level osr method
1193 if (osr_bci == InvocationEntryBci) {
1194 CompiledMethod* code = method->code();
1195 if (code == NULL) {
1196 return (nmethod*) code;
1197 } else {
1198 return code->as_nmethod_or_null();
1199 }
1200 }
1201 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1202 }
1203
1204
1205 // ------------------------------------------------------------------
1206 // CompileBroker::compilation_is_complete
1207 //
1208 // See if compilation of this method is already complete.
1209 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1210 int osr_bci,
1211 int comp_level) {
1212 bool is_osr = (osr_bci != standard_entry_bci);
1213 if (is_osr) {
1214 if (method->is_not_osr_compilable(comp_level)) {
1215 return true;
1216 } else {
1217 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1218 return (result != NULL);
1219 }
1220 } else {
1221 if (method->is_not_compilable(comp_level)) {
1222 return true;
1223 } else {
1224 CompiledMethod* result = method->code();
1225 if (result == NULL) return false;
1226 return comp_level == result->comp_level();
1227 }
1228 }
1229 }
1230
1231
1232 /**
1233 * See if this compilation is already requested.
1234 *
1235 * Implementation note: there is only a single "is in queue" bit
1236 * for each method. This means that the check below is overly
1237 * conservative in the sense that an osr compilation in the queue
1238 * will block a normal compilation from entering the queue (and vice
1239 * versa). This can be remedied by a full queue search to disambiguate
1240 * cases. If it is deemed profitable, this may be done.
1241 */
1242 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1243 return method->queued_for_compilation();
1244 }
1245
1246 // ------------------------------------------------------------------
1247 // CompileBroker::compilation_is_prohibited
1248 //
1249 // See if this compilation is not allowed.
1250 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1251 bool is_native = method->is_native();
1252 // Some compilers may not support the compilation of natives.
1253 AbstractCompiler *comp = compiler(comp_level);
1254 if (is_native &&
1255 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1256 method->set_not_compilable_quietly(comp_level);
1257 return true;
1258 }
1259
1260 bool is_osr = (osr_bci != standard_entry_bci);
1261 // Some compilers may not support on stack replacement.
1262 if (is_osr &&
1263 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1264 method->set_not_osr_compilable(comp_level);
1265 return true;
1266 }
1267
1268 // The method may be explicitly excluded by the user.
1269 double scale;
1270 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1271 bool quietly = CompilerOracle::should_exclude_quietly();
1272 if (PrintCompilation && !quietly) {
1273 // This does not happen quietly...
1274 ResourceMark rm;
1275 tty->print("### Excluding %s:%s",
1276 method->is_native() ? "generation of native wrapper" : "compile",
1277 (method->is_static() ? " static" : ""));
1278 method->print_short_name(tty);
1279 tty->cr();
1280 }
1281 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1282 }
1283
1284 return false;
1285 }
1286
1287 /**
1288 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1289 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1290 * The function also allows to generate separate compilation IDs for OSR compilations.
1291 */
1292 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1293 #ifdef ASSERT
1294 bool is_osr = (osr_bci != standard_entry_bci);
1295 int id;
1296 if (method->is_native()) {
1297 assert(!is_osr, "can't be osr");
1298 // Adapters, native wrappers and method handle intrinsics
1299 // should be generated always.
1300 return Atomic::add(1, &_compilation_id);
1301 } else if (CICountOSR && is_osr) {
1302 id = Atomic::add(1, &_osr_compilation_id);
1303 if (CIStartOSR <= id && id < CIStopOSR) {
1304 return id;
1305 }
1306 } else {
1307 id = Atomic::add(1, &_compilation_id);
1308 if (CIStart <= id && id < CIStop) {
1309 return id;
1310 }
1311 }
1312
1313 // Method was not in the appropriate compilation range.
1314 method->set_not_compilable_quietly();
1315 return 0;
1316 #else
1317 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1318 // only _compilation_id is incremented.
1319 return Atomic::add(1, &_compilation_id);
1320 #endif
1321 }
1322
1323 // ------------------------------------------------------------------
1324 // CompileBroker::assign_compile_id_unlocked
1325 //
1326 // Public wrapper for assign_compile_id that acquires the needed locks
1327 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1328 MutexLocker locker(MethodCompileQueue_lock, thread);
1329 return assign_compile_id(method, osr_bci);
1330 }
1331
1332 // ------------------------------------------------------------------
1333 // CompileBroker::preload_classes
1334 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1335 // Move this code over from c1_Compiler.cpp
1336 ShouldNotReachHere();
1337 }
1338
1339
1340 // ------------------------------------------------------------------
1341 // CompileBroker::create_compile_task
1342 //
1343 // Create a CompileTask object representing the current request for
1344 // compilation. Add this task to the queue.
1345 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1346 int compile_id,
1347 const methodHandle& method,
1348 int osr_bci,
1349 int comp_level,
1350 const methodHandle& hot_method,
1351 int hot_count,
1352 CompileTask::CompileReason compile_reason,
1353 bool blocking) {
1354 CompileTask* new_task = CompileTask::allocate();
1355 new_task->initialize(compile_id, method, osr_bci, comp_level,
1356 hot_method, hot_count, compile_reason,
1357 blocking);
1358 queue->add(new_task);
1359 return new_task;
1360 }
1361
1362 #if INCLUDE_JVMCI
1363 // The number of milliseconds to wait before checking if
1364 // JVMCI compilation has made progress.
1365 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1366
1367 // The number of JVMCI compilation progress checks that must fail
1368 // before unblocking a thread waiting for a blocking compilation.
1369 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1370
1371 /**
1372 * Waits for a JVMCI compiler to complete a given task. This thread
1373 * waits until either the task completes or it sees no JVMCI compilation
1374 * progress for N consecutive milliseconds where N is
1375 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1376 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1377 *
1378 * @return true if this thread needs to free/recycle the task
1379 */
1380 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1381 MutexLocker waiter(task->lock(), thread);
1382 int progress_wait_attempts = 0;
1383 int methods_compiled = jvmci->methods_compiled();
1384 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1385 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1386 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1387
1388 bool progress;
1389 if (jvmci_compiler_thread != NULL) {
1390 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1391 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1392 } else {
1393 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1394 // that all JVMCI compiler threads are blocked on. We use the counter for
1395 // successful JVMCI compilations to determine whether JVMCI compilation
1396 // is still making progress through the JVMCI compiler queue.
1397 progress = jvmci->methods_compiled() != methods_compiled;
1398 }
1399
1400 if (!progress) {
1401 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1402 if (PrintCompilation) {
1403 task->print(tty, "wait for blocking compilation timed out");
1404 }
1405 break;
1406 }
1407 } else {
1408 progress_wait_attempts = 0;
1409 if (jvmci_compiler_thread == NULL) {
1410 methods_compiled = jvmci->methods_compiled();
1411 }
1412 }
1413 }
1414 task->clear_waiter();
1415 return task->is_complete();
1416 }
1417 #endif
1418
1419 /**
1420 * Wait for the compilation task to complete.
1421 */
1422 void CompileBroker::wait_for_completion(CompileTask* task) {
1423 if (CIPrintCompileQueue) {
1424 ttyLocker ttyl;
1425 tty->print_cr("BLOCKING FOR COMPILE");
1426 }
1427
1428 assert(task->is_blocking(), "can only wait on blocking task");
1429
1430 JavaThread* thread = JavaThread::current();
1431 thread->set_blocked_on_compilation(true);
1432
1433 methodHandle method(thread, task->method());
1434 bool free_task;
1435 #if INCLUDE_JVMCI
1436 AbstractCompiler* comp = compiler(task->comp_level());
1437 if (comp->is_jvmci()) {
1438 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1439 } else
1440 #endif
1441 {
1442 MutexLocker waiter(task->lock(), thread);
1443 free_task = true;
1444 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1445 task->lock()->wait();
1446 }
1447 }
1448
1449 thread->set_blocked_on_compilation(false);
1450 if (free_task) {
1451 if (is_compilation_disabled_forever()) {
1452 CompileTask::free(task);
1453 return;
1454 }
1455
1456 // It is harmless to check this status without the lock, because
1457 // completion is a stable property (until the task object is recycled).
1458 assert(task->is_complete(), "Compilation should have completed");
1459 assert(task->code_handle() == NULL, "must be reset");
1460
1461 // By convention, the waiter is responsible for recycling a
1462 // blocking CompileTask. Since there is only one waiter ever
1463 // waiting on a CompileTask, we know that no one else will
1464 // be using this CompileTask; we can free it.
1465 CompileTask::free(task);
1466 }
1467 }
1468
1469 /**
1470 * Initialize compiler thread(s) + compiler object(s). The postcondition
1471 * of this function is that the compiler runtimes are initialized and that
1472 * compiler threads can start compiling.
1473 */
1474 bool CompileBroker::init_compiler_runtime() {
1475 CompilerThread* thread = CompilerThread::current();
1476 AbstractCompiler* comp = thread->compiler();
1477 // Final sanity check - the compiler object must exist
1478 guarantee(comp != NULL, "Compiler object must exist");
1479
1480 int system_dictionary_modification_counter;
1481 {
1482 MutexLocker locker(Compile_lock, thread);
1483 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1484 }
1485
1486 {
1487 // Must switch to native to allocate ci_env
1488 ThreadToNativeFromVM ttn(thread);
1489 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1490 // Cache Jvmti state
1491 ci_env.cache_jvmti_state();
1492 // Cache DTrace flags
1493 ci_env.cache_dtrace_flags();
1494
1495 // Switch back to VM state to do compiler initialization
1496 ThreadInVMfromNative tv(thread);
1497 ResetNoHandleMark rnhm;
1498
1499 // Perform per-thread and global initializations
1500 comp->initialize();
1501 }
1502
1503 if (comp->is_failed()) {
1504 disable_compilation_forever();
1505 // If compiler initialization failed, no compiler thread that is specific to a
1506 // particular compiler runtime will ever start to compile methods.
1507 shutdown_compiler_runtime(comp, thread);
1508 return false;
1509 }
1510
1511 // C1 specific check
1512 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1513 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1514 return false;
1515 }
1516
1517 return true;
1518 }
1519
1520 /**
1521 * If C1 and/or C2 initialization failed, we shut down all compilation.
1522 * We do this to keep things simple. This can be changed if it ever turns
1523 * out to be a problem.
1524 */
1525 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1526 // Free buffer blob, if allocated
1527 if (thread->get_buffer_blob() != NULL) {
1528 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1529 CodeCache::free(thread->get_buffer_blob());
1530 }
1531
1532 if (comp->should_perform_shutdown()) {
1533 // There are two reasons for shutting down the compiler
1534 // 1) compiler runtime initialization failed
1535 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1536 warning("%s initialization failed. Shutting down all compilers", comp->name());
1537
1538 // Only one thread per compiler runtime object enters here
1539 // Set state to shut down
1540 comp->set_shut_down();
1541
1542 // Delete all queued compilation tasks to make compiler threads exit faster.
1543 if (_c1_compile_queue != NULL) {
1544 _c1_compile_queue->free_all();
1545 }
1546
1547 if (_c2_compile_queue != NULL) {
1548 _c2_compile_queue->free_all();
1549 }
1550
1551 // Set flags so that we continue execution with using interpreter only.
1552 UseCompiler = false;
1553 UseInterpreter = true;
1554
1555 // We could delete compiler runtimes also. However, there are references to
1556 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1557 // fail. This can be done later if necessary.
1558 }
1559 }
1560
1561 // ------------------------------------------------------------------
1562 // CompileBroker::compiler_thread_loop
1563 //
1564 // The main loop run by a CompilerThread.
1565 void CompileBroker::compiler_thread_loop() {
1566 CompilerThread* thread = CompilerThread::current();
1567 CompileQueue* queue = thread->queue();
1568 // For the thread that initializes the ciObjectFactory
1569 // this resource mark holds all the shared objects
1570 ResourceMark rm;
1571
1572 // First thread to get here will initialize the compiler interface
1573
1574 {
1575 ASSERT_IN_VM;
1576 MutexLocker only_one (CompileThread_lock, thread);
1577 if (!ciObjectFactory::is_initialized()) {
1578 ciObjectFactory::initialize();
1579 }
1580 }
1581
1582 // Open a log.
1583 if (LogCompilation) {
1584 init_compiler_thread_log();
1585 }
1586 CompileLog* log = thread->log();
1587 if (log != NULL) {
1588 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1589 thread->name(),
1590 os::current_thread_id(),
1591 os::current_process_id());
1592 log->stamp();
1593 log->end_elem();
1594 }
1595
1596 // If compiler thread/runtime initialization fails, exit the compiler thread
1597 if (!init_compiler_runtime()) {
1598 return;
1599 }
1600
1601 // Poll for new compilation tasks as long as the JVM runs. Compilation
1602 // should only be disabled if something went wrong while initializing the
1603 // compiler runtimes. This, in turn, should not happen. The only known case
1604 // when compiler runtime initialization fails is if there is not enough free
1605 // space in the code cache to generate the necessary stubs, etc.
1606 while (!is_compilation_disabled_forever()) {
1607 // We need this HandleMark to avoid leaking VM handles.
1608 HandleMark hm(thread);
1609
1610 CompileTask* task = queue->get();
1611 if (task == NULL) {
1612 continue;
1613 }
1614
1615 // Give compiler threads an extra quanta. They tend to be bursty and
1616 // this helps the compiler to finish up the job.
1617 if (CompilerThreadHintNoPreempt) {
1618 os::hint_no_preempt();
1619 }
1620
1621 // Assign the task to the current thread. Mark this compilation
1622 // thread as active for the profiler.
1623 CompileTaskWrapper ctw(task);
1624 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1625 task->set_code_handle(&result_handle);
1626 methodHandle method(thread, task->method());
1627
1628 // Never compile a method if breakpoints are present in it
1629 if (method()->number_of_breakpoints() == 0) {
1630 // Compile the method.
1631 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1632 invoke_compiler_on_method(task);
1633 } else {
1634 // After compilation is disabled, remove remaining methods from queue
1635 method->clear_queued_for_compilation();
1636 task->set_failure_reason("compilation is disabled");
1637 }
1638 }
1639 }
1640
1641 // Shut down compiler runtime
1642 shutdown_compiler_runtime(thread->compiler(), thread);
1643 }
1644
1645 // ------------------------------------------------------------------
1646 // CompileBroker::init_compiler_thread_log
1647 //
1648 // Set up state required by +LogCompilation.
1649 void CompileBroker::init_compiler_thread_log() {
1650 CompilerThread* thread = CompilerThread::current();
1651 char file_name[4*K];
1652 FILE* fp = NULL;
1653 intx thread_id = os::current_thread_id();
1654 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1655 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1656 if (dir == NULL) {
1657 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1658 thread_id, os::current_process_id());
1659 } else {
1660 jio_snprintf(file_name, sizeof(file_name),
1661 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1662 os::file_separator(), thread_id, os::current_process_id());
1663 }
1664
1665 fp = fopen(file_name, "wt");
1666 if (fp != NULL) {
1667 if (LogCompilation && Verbose) {
1668 tty->print_cr("Opening compilation log %s", file_name);
1669 }
1670 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1671 if (log == NULL) {
1672 fclose(fp);
1673 return;
1674 }
1675 thread->init_log(log);
1676
1677 if (xtty != NULL) {
1678 ttyLocker ttyl;
1679 // Record any per thread log files
1680 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1681 }
1682 return;
1683 }
1684 }
1685 warning("Cannot open log file: %s", file_name);
1686 }
1687
1688 void CompileBroker::log_metaspace_failure() {
1689 const char* message = "some methods may not be compiled because metaspace "
1690 "is out of memory";
1691 if (_compilation_log != NULL) {
1692 _compilation_log->log_metaspace_failure(message);
1693 }
1694 if (PrintCompilation) {
1695 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1696 }
1697 }
1698
1699
1700 // ------------------------------------------------------------------
1701 // CompileBroker::set_should_block
1702 //
1703 // Set _should_block.
1704 // Call this from the VM, with Threads_lock held and a safepoint requested.
1705 void CompileBroker::set_should_block() {
1706 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1707 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1708 #ifndef PRODUCT
1709 if (PrintCompilation && (Verbose || WizardMode))
1710 tty->print_cr("notifying compiler thread pool to block");
1711 #endif
1712 _should_block = true;
1713 }
1714
1715 // ------------------------------------------------------------------
1716 // CompileBroker::maybe_block
1717 //
1718 // Call this from the compiler at convenient points, to poll for _should_block.
1719 void CompileBroker::maybe_block() {
1720 if (_should_block) {
1721 #ifndef PRODUCT
1722 if (PrintCompilation && (Verbose || WizardMode))
1723 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1724 #endif
1725 ThreadInVMfromNative tivfn(JavaThread::current());
1726 }
1727 }
1728
1729 // wrapper for CodeCache::print_summary()
1730 static void codecache_print(bool detailed)
1731 {
1732 ResourceMark rm;
1733 stringStream s;
1734 // Dump code cache into a buffer before locking the tty,
1735 {
1736 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1737 CodeCache::print_summary(&s, detailed);
1738 }
1739 ttyLocker ttyl;
1740 tty->print("%s", s.as_string());
1741 }
1742
1743 // wrapper for CodeCache::print_summary() using outputStream
1744 static void codecache_print(outputStream* out, bool detailed) {
1745 ResourceMark rm;
1746 stringStream s;
1747
1748 // Dump code cache into a buffer
1749 {
1750 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1751 CodeCache::print_summary(&s, detailed);
1752 }
1753
1754 char* remaining_log = s.as_string();
1755 while (*remaining_log != '\0') {
1756 char* eol = strchr(remaining_log, '\n');
1757 if (eol == NULL) {
1758 out->print_cr("%s", remaining_log);
1759 remaining_log = remaining_log + strlen(remaining_log);
1760 } else {
1761 *eol = '\0';
1762 out->print_cr("%s", remaining_log);
1763 remaining_log = eol + 1;
1764 }
1765 }
1766 }
1767
1768 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1769
1770 if (success) {
1771 task->mark_success();
1772 if (ci_env != NULL) {
1773 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1774 }
1775 if (_compilation_log != NULL) {
1776 nmethod* code = task->code();
1777 if (code != NULL) {
1778 _compilation_log->log_nmethod(thread, code);
1779 }
1780 }
1781 }
1782
1783 // simulate crash during compilation
1784 assert(task->compile_id() != CICrashAt, "just as planned");
1785 if (event.should_commit()) {
1786 event.set_method(task->method());
1787 event.set_compileId(task->compile_id());
1788 event.set_compileLevel(task->comp_level());
1789 event.set_succeded(task->is_success());
1790 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1791 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1792 event.set_inlinedBytes(task->num_inlined_bytecodes());
1793 event.commit();
1794 }
1795 }
1796
1797 int DirectivesStack::_depth = 0;
1798 CompilerDirectives* DirectivesStack::_top = NULL;
1799 CompilerDirectives* DirectivesStack::_bottom = NULL;
1800
1801 // ------------------------------------------------------------------
1802 // CompileBroker::invoke_compiler_on_method
1803 //
1804 // Compile a method.
1805 //
1806 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1807 task->print_ul();
1808 if (PrintCompilation) {
1809 ResourceMark rm;
1810 task->print_tty();
1811 }
1812 elapsedTimer time;
1813
1814 CompilerThread* thread = CompilerThread::current();
1815 ResourceMark rm(thread);
1816
1817 if (LogEvents) {
1818 _compilation_log->log_compile(thread, task);
1819 }
1820
1821 // Common flags.
1822 uint compile_id = task->compile_id();
1823 int osr_bci = task->osr_bci();
1824 bool is_osr = (osr_bci != standard_entry_bci);
1825 bool should_log = (thread->log() != NULL);
1826 bool should_break = false;
1827 const int task_level = task->comp_level();
1828 AbstractCompiler* comp = task->compiler();
1829
1830 DirectiveSet* directive;
1831 {
1832 // create the handle inside it's own block so it can't
1833 // accidentally be referenced once the thread transitions to
1834 // native. The NoHandleMark before the transition should catch
1835 // any cases where this occurs in the future.
1836 methodHandle method(thread, task->method());
1837 assert(!method->is_native(), "no longer compile natives");
1838
1839 // Look up matching directives
1840 directive = DirectivesStack::getMatchingDirective(method, comp);
1841
1842 // Save information about this method in case of failure.
1843 set_last_compile(thread, method, is_osr, task_level);
1844
1845 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1846 }
1847
1848 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1849 if (should_log && !directive->LogOption) {
1850 should_log = false;
1851 }
1852
1853 // Allocate a new set of JNI handles.
1854 push_jni_handle_block();
1855 Method* target_handle = task->method();
1856 int compilable = ciEnv::MethodCompilable;
1857 const char* failure_reason = NULL;
1858 const char* retry_message = NULL;
1859
1860 int system_dictionary_modification_counter;
1861 {
1862 MutexLocker locker(Compile_lock, thread);
1863 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1864 }
1865
1866 #if INCLUDE_JVMCI
1867 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1868 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1869
1870 TraceTime t1("compilation", &time);
1871 EventCompilation event;
1872
1873 // Skip redefined methods
1874 if (target_handle->is_old()) {
1875 failure_reason = "redefined method";
1876 retry_message = "not retryable";
1877 compilable = ciEnv::MethodCompilable_never;
1878 } else {
1879 JVMCIEnv env(task, system_dictionary_modification_counter);
1880 methodHandle method(thread, target_handle);
1881 jvmci->compile_method(method, osr_bci, &env);
1882
1883 failure_reason = env.failure_reason();
1884 if (!env.retryable()) {
1885 retry_message = "not retryable";
1886 compilable = ciEnv::MethodCompilable_not_at_tier;
1887 }
1888 }
1889 post_compile(thread, task, event, task->code() != NULL, NULL);
1890
1891 } else
1892 #endif // INCLUDE_JVMCI
1893 {
1894 NoHandleMark nhm;
1895 ThreadToNativeFromVM ttn(thread);
1896
1897 ciEnv ci_env(task, system_dictionary_modification_counter);
1898 if (should_break) {
1899 ci_env.set_break_at_compile(true);
1900 }
1901 if (should_log) {
1902 ci_env.set_log(thread->log());
1903 }
1904 assert(thread->env() == &ci_env, "set by ci_env");
1905 // The thread-env() field is cleared in ~CompileTaskWrapper.
1906
1907 // Cache Jvmti state
1908 ci_env.cache_jvmti_state();
1909
1910 // Cache DTrace flags
1911 ci_env.cache_dtrace_flags();
1912
1913 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1914
1915 TraceTime t1("compilation", &time);
1916 EventCompilation event;
1917
1918 if (comp == NULL) {
1919 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1920 } else {
1921 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1922 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1923 while (WhiteBox::compilation_locked) {
1924 locker.wait(Mutex::_no_safepoint_check_flag);
1925 }
1926 }
1927 comp->compile_method(&ci_env, target, osr_bci, directive);
1928 }
1929
1930 if (!ci_env.failing() && task->code() == NULL) {
1931 //assert(false, "compiler should always document failure");
1932 // The compiler elected, without comment, not to register a result.
1933 // Do not attempt further compilations of this method.
1934 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1935 }
1936
1937 // Copy this bit to the enclosing block:
1938 compilable = ci_env.compilable();
1939
1940 if (ci_env.failing()) {
1941 failure_reason = ci_env.failure_reason();
1942 retry_message = ci_env.retry_message();
1943 ci_env.report_failure(failure_reason);
1944 }
1945
1946 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1947 }
1948 // Remove the JNI handle block after the ciEnv destructor has run in
1949 // the previous block.
1950 pop_jni_handle_block();
1951
1952 if (failure_reason != NULL) {
1953 task->set_failure_reason(failure_reason);
1954 if (_compilation_log != NULL) {
1955 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1956 }
1957 if (PrintCompilation) {
1958 FormatBufferResource msg = retry_message != NULL ?
1959 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1960 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1961 task->print(tty, msg);
1962 }
1963 }
1964
1965 methodHandle method(thread, task->method());
1966
1967 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1968
1969 collect_statistics(thread, time, task);
1970
1971 nmethod* nm = task->code();
1972 if (nm != NULL) {
1973 nm->maybe_print_nmethod(directive);
1974 }
1975 DirectivesStack::release(directive);
1976
1977 if (PrintCompilation && PrintCompilation2) {
1978 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1979 tty->print("%4d ", compile_id); // print compilation number
1980 tty->print("%s ", (is_osr ? "%" : " "));
1981 if (task->code() != NULL) {
1982 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1983 }
1984 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1985 }
1986
1987 Log(compilation, codecache) log;
1988 if (log.is_debug()) {
1989 LogStream ls(log.debug());
1990 codecache_print(&ls, /* detailed= */ false);
1991 }
1992 if (PrintCodeCacheOnCompilation) {
1993 codecache_print(/* detailed= */ false);
1994 }
1995 // Disable compilation, if required.
1996 switch (compilable) {
1997 case ciEnv::MethodCompilable_never:
1998 if (is_osr)
1999 method->set_not_osr_compilable_quietly();
2000 else
2001 method->set_not_compilable_quietly();
2002 break;
2003 case ciEnv::MethodCompilable_not_at_tier:
2004 if (is_osr)
2005 method->set_not_osr_compilable_quietly(task_level);
2006 else
2007 method->set_not_compilable_quietly(task_level);
2008 break;
2009 }
2010
2011 // Note that the queued_for_compilation bits are cleared without
2012 // protection of a mutex. [They were set by the requester thread,
2013 // when adding the task to the compile queue -- at which time the
2014 // compile queue lock was held. Subsequently, we acquired the compile
2015 // queue lock to get this task off the compile queue; thus (to belabour
2016 // the point somewhat) our clearing of the bits must be occurring
2017 // only after the setting of the bits. See also 14012000 above.
2018 method->clear_queued_for_compilation();
2019
2020 #ifdef ASSERT
2021 if (CollectedHeap::fired_fake_oom()) {
2022 // The current compile received a fake OOM during compilation so
2023 // go ahead and exit the VM since the test apparently succeeded
2024 tty->print_cr("*** Shutting down VM after successful fake OOM");
2025 vm_exit(0);
2026 }
2027 #endif
2028 }
2029
2030 /**
2031 * The CodeCache is full. Print warning and disable compilation.
2032 * Schedule code cache cleaning so compilation can continue later.
2033 * This function needs to be called only from CodeCache::allocate(),
2034 * since we currently handle a full code cache uniformly.
2035 */
2036 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2037 UseInterpreter = true;
2038 if (UseCompiler || AlwaysCompileLoopMethods ) {
2039 if (xtty != NULL) {
2040 ResourceMark rm;
2041 stringStream s;
2042 // Dump code cache state into a buffer before locking the tty,
2043 // because log_state() will use locks causing lock conflicts.
2044 CodeCache::log_state(&s);
2045 // Lock to prevent tearing
2046 ttyLocker ttyl;
2047 xtty->begin_elem("code_cache_full");
2048 xtty->print("%s", s.as_string());
2049 xtty->stamp();
2050 xtty->end_elem();
2051 }
2052
2053 #ifndef PRODUCT
2054 if (CompileTheWorld || ExitOnFullCodeCache) {
2055 codecache_print(/* detailed= */ true);
2056 before_exit(JavaThread::current());
2057 exit_globals(); // will delete tty
2058 vm_direct_exit(CompileTheWorld ? 0 : 1);
2059 }
2060 #endif
2061 if (UseCodeCacheFlushing) {
2062 // Since code cache is full, immediately stop new compiles
2063 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2064 NMethodSweeper::log_sweep("disable_compiler");
2065 }
2066 } else {
2067 disable_compilation_forever();
2068 }
2069
2070 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2071 }
2072 }
2073
2074 // ------------------------------------------------------------------
2075 // CompileBroker::set_last_compile
2076 //
2077 // Record this compilation for debugging purposes.
2078 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2079 ResourceMark rm;
2080 char* method_name = method->name()->as_C_string();
2081 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2082 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2083 char current_method[CompilerCounters::cmname_buffer_length];
2084 size_t maxLen = CompilerCounters::cmname_buffer_length;
2085
2086 if (UsePerfData) {
2087 const char* class_name = method->method_holder()->name()->as_C_string();
2088
2089 size_t s1len = strlen(class_name);
2090 size_t s2len = strlen(method_name);
2091
2092 // check if we need to truncate the string
2093 if (s1len + s2len + 2 > maxLen) {
2094
2095 // the strategy is to lop off the leading characters of the
2096 // class name and the trailing characters of the method name.
2097
2098 if (s2len + 2 > maxLen) {
2099 // lop of the entire class name string, let snprintf handle
2100 // truncation of the method name.
2101 class_name += s1len; // null string
2102 }
2103 else {
2104 // lop off the extra characters from the front of the class name
2105 class_name += ((s1len + s2len + 2) - maxLen);
2106 }
2107 }
2108
2109 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2110 }
2111
2112 if (CICountOSR && is_osr) {
2113 _last_compile_type = osr_compile;
2114 } else {
2115 _last_compile_type = normal_compile;
2116 }
2117 _last_compile_level = comp_level;
2118
2119 if (UsePerfData) {
2120 CompilerCounters* counters = thread->counters();
2121 counters->set_current_method(current_method);
2122 counters->set_compile_type((jlong)_last_compile_type);
2123 }
2124 }
2125
2126
2127 // ------------------------------------------------------------------
2128 // CompileBroker::push_jni_handle_block
2129 //
2130 // Push on a new block of JNI handles.
2131 void CompileBroker::push_jni_handle_block() {
2132 JavaThread* thread = JavaThread::current();
2133
2134 // Allocate a new block for JNI handles.
2135 // Inlined code from jni_PushLocalFrame()
2136 JNIHandleBlock* java_handles = thread->active_handles();
2137 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2138 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2139 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2140 thread->set_active_handles(compile_handles);
2141 }
2142
2143
2144 // ------------------------------------------------------------------
2145 // CompileBroker::pop_jni_handle_block
2146 //
2147 // Pop off the current block of JNI handles.
2148 void CompileBroker::pop_jni_handle_block() {
2149 JavaThread* thread = JavaThread::current();
2150
2151 // Release our JNI handle block
2152 JNIHandleBlock* compile_handles = thread->active_handles();
2153 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2154 thread->set_active_handles(java_handles);
2155 compile_handles->set_pop_frame_link(NULL);
2156 JNIHandleBlock::release_block(compile_handles, thread); // may block
2157 }
2158
2159 // ------------------------------------------------------------------
2160 // CompileBroker::collect_statistics
2161 //
2162 // Collect statistics about the compilation.
2163
2164 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2165 bool success = task->is_success();
2166 methodHandle method (thread, task->method());
2167 uint compile_id = task->compile_id();
2168 bool is_osr = (task->osr_bci() != standard_entry_bci);
2169 nmethod* code = task->code();
2170 CompilerCounters* counters = thread->counters();
2171
2172 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2173 MutexLocker locker(CompileStatistics_lock);
2174
2175 // _perf variables are production performance counters which are
2176 // updated regardless of the setting of the CITime and CITimeEach flags
2177 //
2178
2179 // account all time, including bailouts and failures in this counter;
2180 // C1 and C2 counters are counting both successful and unsuccessful compiles
2181 _t_total_compilation.add(time);
2182
2183 if (!success) {
2184 _total_bailout_count++;
2185 if (UsePerfData) {
2186 _perf_last_failed_method->set_value(counters->current_method());
2187 _perf_last_failed_type->set_value(counters->compile_type());
2188 _perf_total_bailout_count->inc();
2189 }
2190 _t_bailedout_compilation.add(time);
2191 } else if (code == NULL) {
2192 if (UsePerfData) {
2193 _perf_last_invalidated_method->set_value(counters->current_method());
2194 _perf_last_invalidated_type->set_value(counters->compile_type());
2195 _perf_total_invalidated_count->inc();
2196 }
2197 _total_invalidated_count++;
2198 _t_invalidated_compilation.add(time);
2199 } else {
2200 // Compilation succeeded
2201
2202 // update compilation ticks - used by the implementation of
2203 // java.lang.management.CompilationMBean
2204 _perf_total_compilation->inc(time.ticks());
2205 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2206
2207 if (CITime) {
2208 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2209 if (is_osr) {
2210 _t_osr_compilation.add(time);
2211 _sum_osr_bytes_compiled += bytes_compiled;
2212 } else {
2213 _t_standard_compilation.add(time);
2214 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2215 }
2216
2217 #if INCLUDE_JVMCI
2218 AbstractCompiler* comp = compiler(task->comp_level());
2219 if (comp) {
2220 CompilerStatistics* stats = comp->stats();
2221 if (stats) {
2222 if (is_osr) {
2223 stats->_osr.update(time, bytes_compiled);
2224 } else {
2225 stats->_standard.update(time, bytes_compiled);
2226 }
2227 stats->_nmethods_size += code->total_size();
2228 stats->_nmethods_code_size += code->insts_size();
2229 } else { // if (!stats)
2230 assert(false, "Compiler statistics object must exist");
2231 }
2232 } else { // if (!comp)
2233 assert(false, "Compiler object must exist");
2234 }
2235 #endif // INCLUDE_JVMCI
2236 }
2237
2238 if (UsePerfData) {
2239 // save the name of the last method compiled
2240 _perf_last_method->set_value(counters->current_method());
2241 _perf_last_compile_type->set_value(counters->compile_type());
2242 _perf_last_compile_size->set_value(method->code_size() +
2243 task->num_inlined_bytecodes());
2244 if (is_osr) {
2245 _perf_osr_compilation->inc(time.ticks());
2246 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2247 } else {
2248 _perf_standard_compilation->inc(time.ticks());
2249 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2250 }
2251 }
2252
2253 if (CITimeEach) {
2254 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2255 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2256 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2257 }
2258
2259 // Collect counts of successful compilations
2260 _sum_nmethod_size += code->total_size();
2261 _sum_nmethod_code_size += code->insts_size();
2262 _total_compile_count++;
2263
2264 if (UsePerfData) {
2265 _perf_sum_nmethod_size->inc( code->total_size());
2266 _perf_sum_nmethod_code_size->inc(code->insts_size());
2267 _perf_total_compile_count->inc();
2268 }
2269
2270 if (is_osr) {
2271 if (UsePerfData) _perf_total_osr_compile_count->inc();
2272 _total_osr_compile_count++;
2273 } else {
2274 if (UsePerfData) _perf_total_standard_compile_count->inc();
2275 _total_standard_compile_count++;
2276 }
2277 }
2278 // set the current method for the thread to null
2279 if (UsePerfData) counters->set_current_method("");
2280 }
2281
2282 const char* CompileBroker::compiler_name(int comp_level) {
2283 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2284 if (comp == NULL) {
2285 return "no compiler";
2286 } else {
2287 return (comp->name());
2288 }
2289 }
2290
2291 #if INCLUDE_JVMCI
2292 void CompileBroker::print_times(AbstractCompiler* comp) {
2293 CompilerStatistics* stats = comp->stats();
2294 if (stats) {
2295 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}",
2296 comp->name(), stats->bytes_per_second(),
2297 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2298 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2299 stats->_nmethods_size, stats->_nmethods_code_size);
2300 } else { // if (!stats)
2301 assert(false, "Compiler statistics object must exist");
2302 }
2303 comp->print_timers();
2304 }
2305 #endif // INCLUDE_JVMCI
2306
2307 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2308 #if INCLUDE_JVMCI
2309 elapsedTimer standard_compilation;
2310 elapsedTimer total_compilation;
2311 elapsedTimer osr_compilation;
2312
2313 int standard_bytes_compiled = 0;
2314 int osr_bytes_compiled = 0;
2315
2316 int standard_compile_count = 0;
2317 int osr_compile_count = 0;
2318 int total_compile_count = 0;
2319
2320 int nmethods_size = 0;
2321 int nmethods_code_size = 0;
2322 bool printedHeader = false;
2323
2324 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2325 AbstractCompiler* comp = _compilers[i];
2326 if (comp != NULL) {
2327 if (per_compiler && aggregate && !printedHeader) {
2328 printedHeader = true;
2329 tty->cr();
2330 tty->print_cr("Individual compiler times (for compiled methods only)");
2331 tty->print_cr("------------------------------------------------");
2332 tty->cr();
2333 }
2334 CompilerStatistics* stats = comp->stats();
2335
2336 if (stats) {
2337 standard_compilation.add(stats->_standard._time);
2338 osr_compilation.add(stats->_osr._time);
2339
2340 standard_bytes_compiled += stats->_standard._bytes;
2341 osr_bytes_compiled += stats->_osr._bytes;
2342
2343 standard_compile_count += stats->_standard._count;
2344 osr_compile_count += stats->_osr._count;
2345
2346 nmethods_size += stats->_nmethods_size;
2347 nmethods_code_size += stats->_nmethods_code_size;
2348 } else { // if (!stats)
2349 assert(false, "Compiler statistics object must exist");
2350 }
2351
2352 if (per_compiler) {
2353 print_times(comp);
2354 }
2355 }
2356 }
2357 total_compile_count = osr_compile_count + standard_compile_count;
2358 total_compilation.add(osr_compilation);
2359 total_compilation.add(standard_compilation);
2360
2361 // In hosted mode, print the JVMCI compiler specific counters manually.
2362 if (!UseJVMCICompiler) {
2363 JVMCICompiler::print_compilation_timers();
2364 }
2365 #else // INCLUDE_JVMCI
2366 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2367 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2368 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2369
2370 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2371 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2372
2373 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2374 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2375 int total_compile_count = CompileBroker::_total_compile_count;
2376
2377 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2378 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2379 #endif // INCLUDE_JVMCI
2380
2381 if (!aggregate) {
2382 return;
2383 }
2384 tty->cr();
2385 tty->print_cr("Accumulated compiler times");
2386 tty->print_cr("----------------------------------------------------------");
2387 //0000000000111111111122222222223333333333444444444455555555556666666666
2388 //0123456789012345678901234567890123456789012345678901234567890123456789
2389 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2390 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2391 standard_compilation.seconds(),
2392 standard_compilation.seconds() / standard_compile_count);
2393 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2394 CompileBroker::_t_bailedout_compilation.seconds(),
2395 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2396 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2397 osr_compilation.seconds(),
2398 osr_compilation.seconds() / osr_compile_count);
2399 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2400 CompileBroker::_t_invalidated_compilation.seconds(),
2401 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2402
2403 AbstractCompiler *comp = compiler(CompLevel_simple);
2404 if (comp != NULL) {
2405 tty->cr();
2406 comp->print_timers();
2407 }
2408 comp = compiler(CompLevel_full_optimization);
2409 if (comp != NULL) {
2410 tty->cr();
2411 comp->print_timers();
2412 }
2413 tty->cr();
2414 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2415 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2416 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2417 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2418 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2419 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2420 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2421 double tcs = total_compilation.seconds();
2422 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2423 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2424 tty->cr();
2425 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2426 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2427 }
2428
2429 // Debugging output for failure
2430 void CompileBroker::print_last_compile() {
2431 if (_last_compile_level != CompLevel_none &&
2432 compiler(_last_compile_level) != NULL &&
2433 _last_compile_type != no_compile) {
2434 if (_last_compile_type == osr_compile) {
2435 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2436 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2437 } else {
2438 tty->print_cr("Last parse: %d+++(%d) %s",
2439 _compilation_id, _last_compile_level, _last_method_compiled);
2440 }
2441 }
2442 }