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