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