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