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