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 #if INCLUDE_JVMCI
56 #include "jvmci/jvmciCompiler.hpp"
57 #include "jvmci/jvmciRuntime.hpp"
58 #include "runtime/vframe.hpp"
59 #endif
60 #ifdef COMPILER2
61 #include "opto/c2compiler.hpp"
62 #endif
63 #ifdef SHARK
64 #include "shark/sharkCompiler.hpp"
65 #endif
66
67 #ifdef DTRACE_ENABLED
68
69 // Only bother with this argument setup if dtrace is available
70
71 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
72 { \
73 Symbol* klass_name = (method)->klass_name(); \
74 Symbol* name = (method)->name(); \
75 Symbol* signature = (method)->signature(); \
76 HOTSPOT_METHOD_COMPILE_BEGIN( \
77 (char *) comp_name, strlen(comp_name), \
78 (char *) klass_name->bytes(), klass_name->utf8_length(), \
79 (char *) name->bytes(), name->utf8_length(), \
80 (char *) signature->bytes(), signature->utf8_length()); \
81 }
82
83 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
84 { \
85 Symbol* klass_name = (method)->klass_name(); \
86 Symbol* name = (method)->name(); \
87 Symbol* signature = (method)->signature(); \
88 HOTSPOT_METHOD_COMPILE_END( \
89 (char *) comp_name, strlen(comp_name), \
90 (char *) klass_name->bytes(), klass_name->utf8_length(), \
91 (char *) name->bytes(), name->utf8_length(), \
92 (char *) signature->bytes(), signature->utf8_length(), (success)); \
93 }
94
95 #else // ndef DTRACE_ENABLED
96
97 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
98 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
99
100 #endif // ndef DTRACE_ENABLED
101
102 bool CompileBroker::_initialized = false;
103 volatile bool CompileBroker::_should_block = false;
104 volatile jint CompileBroker::_print_compilation_warning = 0;
105 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
106
107 // The installed compiler(s)
108 AbstractCompiler* CompileBroker::_compilers[2];
109
110 // These counters are used to assign an unique ID to each compilation.
111 volatile jint CompileBroker::_compilation_id = 0;
112 volatile jint CompileBroker::_osr_compilation_id = 0;
113
114 // Debugging information
115 int CompileBroker::_last_compile_type = no_compile;
116 int CompileBroker::_last_compile_level = CompLevel_none;
117 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
118
119 // Performance counters
120 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
121 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
122 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
123
124 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
125 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
126 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
127 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
128 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
129
130 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
131 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
132 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
133 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
134
135 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
136 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
137 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
138 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
139 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
140 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
141 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
142
143 // Timers and counters for generating statistics
144 elapsedTimer CompileBroker::_t_total_compilation;
145 elapsedTimer CompileBroker::_t_osr_compilation;
146 elapsedTimer CompileBroker::_t_standard_compilation;
147 elapsedTimer CompileBroker::_t_invalidated_compilation;
148 elapsedTimer CompileBroker::_t_bailedout_compilation;
149
150 int CompileBroker::_total_bailout_count = 0;
151 int CompileBroker::_total_invalidated_count = 0;
152 int CompileBroker::_total_compile_count = 0;
153 int CompileBroker::_total_osr_compile_count = 0;
154 int CompileBroker::_total_standard_compile_count = 0;
155
156 int CompileBroker::_sum_osr_bytes_compiled = 0;
157 int CompileBroker::_sum_standard_bytes_compiled = 0;
158 int CompileBroker::_sum_nmethod_size = 0;
159 int CompileBroker::_sum_nmethod_code_size = 0;
160
161 long CompileBroker::_peak_compilation_time = 0;
162
163 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
164 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
165
166 class CompilationLog : public StringEventLog {
167 public:
168 CompilationLog() : StringEventLog("Compilation events") {
169 }
170
171 void log_compile(JavaThread* thread, CompileTask* task) {
172 StringLogMessage lm;
173 stringStream sstr = lm.stream();
174 // msg.time_stamp().update_to(tty->time_stamp().ticks());
175 task->print(&sstr, NULL, true, false);
176 log(thread, "%s", (const char*)lm);
177 }
178
179 void log_nmethod(JavaThread* thread, nmethod* nm) {
180 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
181 nm->compile_id(), nm->is_osr_method() ? "%" : "",
182 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
183 }
184
185 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
186 StringLogMessage lm;
187 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
188 if (retry_message != NULL) {
189 lm.append(" (%s)", retry_message);
190 }
191 lm.print("\n");
192 log(thread, "%s", (const char*)lm);
193 }
194
195 void log_metaspace_failure(const char* reason) {
196 ResourceMark rm;
197 StringLogMessage lm;
198 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
199 lm.print("\n");
200 log(JavaThread::current(), "%s", (const char*)lm);
201 }
202 };
203
204 static CompilationLog* _compilation_log = NULL;
205
206 bool compileBroker_init() {
207 if (LogEvents) {
208 _compilation_log = new CompilationLog();
209 }
210
211 // init directives stack, adding default directive
212 DirectivesStack::init();
213
214 if (DirectivesParser::has_file()) {
215 return DirectivesParser::parse_from_flag();
216 } else if (PrintCompilerDirectives) {
217 // Print default directive even when no other was added
218 DirectivesStack::print(tty);
219 }
220
221 return true;
222 }
223
224 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
225 CompilerThread* thread = CompilerThread::current();
226 thread->set_task(task);
227 CompileLog* log = thread->log();
228 if (log != NULL) task->log_task_start(log);
229 }
230
231 CompileTaskWrapper::~CompileTaskWrapper() {
232 CompilerThread* thread = CompilerThread::current();
233 CompileTask* task = thread->task();
234 CompileLog* log = thread->log();
235 if (log != NULL) task->log_task_done(log);
236 thread->set_task(NULL);
237 task->set_code_handle(NULL);
238 thread->set_env(NULL);
239 if (task->is_blocking()) {
240 MutexLocker notifier(task->lock(), thread);
241 task->mark_complete();
242 // Notify the waiting thread that the compilation has completed.
243 task->lock()->notify_all();
244 } else {
245 task->mark_complete();
246
247 // By convention, the compiling thread is responsible for
248 // recycling a non-blocking CompileTask.
249 CompileTask::free(task);
250 }
251 }
252
253 /**
254 * Add a CompileTask to a CompileQueue.
255 */
256 void CompileQueue::add(CompileTask* task) {
257 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
258
259 task->set_next(NULL);
260 task->set_prev(NULL);
261
262 if (_last == NULL) {
263 // The compile queue is empty.
264 assert(_first == NULL, "queue is empty");
265 _first = task;
266 _last = task;
267 } else {
268 // Append the task to the queue.
269 assert(_last->next() == NULL, "not last");
270 _last->set_next(task);
271 task->set_prev(_last);
272 _last = task;
273 }
274 ++_size;
275
276 // Mark the method as being in the compile queue.
277 task->method()->set_queued_for_compilation();
278
279 if (CIPrintCompileQueue) {
280 print_tty();
281 }
282
283 if (LogCompilation && xtty != NULL) {
284 task->log_task_queued();
285 }
286
287 // Notify CompilerThreads that a task is available.
288 MethodCompileQueue_lock->notify_all();
289 }
290
291 /**
292 * Empties compilation queue by putting all compilation tasks onto
293 * a freelist. Furthermore, the method wakes up all threads that are
294 * waiting on a compilation task to finish. This can happen if background
295 * compilation is disabled.
296 */
297 void CompileQueue::free_all() {
298 MutexLocker mu(MethodCompileQueue_lock);
299 CompileTask* next = _first;
300
301 // Iterate over all tasks in the compile queue
302 while (next != NULL) {
303 CompileTask* current = next;
304 next = current->next();
305 {
306 // Wake up thread that blocks on the compile task.
307 MutexLocker ct_lock(current->lock());
308 current->lock()->notify();
309 }
310 // Put the task back on the freelist.
311 CompileTask::free(current);
312 }
313 _first = NULL;
314
315 // Wake up all threads that block on the queue.
316 MethodCompileQueue_lock->notify_all();
317 }
318
319 /**
320 * Get the next CompileTask from a CompileQueue
321 */
322 CompileTask* CompileQueue::get() {
323 // save methods from RedefineClasses across safepoint
324 // across MethodCompileQueue_lock below.
325 methodHandle save_method;
326 methodHandle save_hot_method;
327
328 MutexLocker locker(MethodCompileQueue_lock);
329 // If _first is NULL we have no more compile jobs. There are two reasons for
330 // having no compile jobs: First, we compiled everything we wanted. Second,
331 // we ran out of code cache so compilation has been disabled. In the latter
332 // case we perform code cache sweeps to free memory such that we can re-enable
333 // compilation.
334 while (_first == NULL) {
335 // Exit loop if compilation is disabled forever
336 if (CompileBroker::is_compilation_disabled_forever()) {
337 return NULL;
338 }
339
340 // If there are no compilation tasks and we can compile new jobs
341 // (i.e., there is enough free space in the code cache) there is
342 // no need to invoke the sweeper. As a result, the hotness of methods
343 // remains unchanged. This behavior is desired, since we want to keep
344 // the stable state, i.e., we do not want to evict methods from the
345 // code cache if it is unnecessary.
346 // We need a timed wait here, since compiler threads can exit if compilation
347 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
348 // is not critical and we do not want idle compiler threads to wake up too often.
349 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
350 }
351
352 if (CompileBroker::is_compilation_disabled_forever()) {
353 return NULL;
354 }
355
356 CompileTask* task;
357 {
358 No_Safepoint_Verifier nsv;
359 task = CompilationPolicy::policy()->select_task(this);
360 }
361
362 // Save method pointers across unlock safepoint. The task is removed from
363 // the compilation queue, which is walked during RedefineClasses.
364 save_method = methodHandle(task->method());
365 save_hot_method = methodHandle(task->hot_method());
366
367 remove(task);
368 purge_stale_tasks(); // may temporarily release MCQ lock
369 return task;
370 }
371
372 // Clean & deallocate stale compile tasks.
373 // Temporarily releases MethodCompileQueue lock.
374 void CompileQueue::purge_stale_tasks() {
375 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
376 if (_first_stale != NULL) {
377 // Stale tasks are purged when MCQ lock is released,
378 // but _first_stale updates are protected by MCQ lock.
379 // Once task processing starts and MCQ lock is released,
380 // other compiler threads can reuse _first_stale.
381 CompileTask* head = _first_stale;
382 _first_stale = NULL;
383 {
384 MutexUnlocker ul(MethodCompileQueue_lock);
385 for (CompileTask* task = head; task != NULL; ) {
386 CompileTask* next_task = task->next();
387 CompileTaskWrapper ctw(task); // Frees the task
388 task->set_failure_reason("stale task");
389 task = next_task;
390 }
391 }
392 }
393 }
394
395 void CompileQueue::remove(CompileTask* task) {
396 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
397 if (task->prev() != NULL) {
398 task->prev()->set_next(task->next());
399 } else {
400 // max is the first element
401 assert(task == _first, "Sanity");
402 _first = task->next();
403 }
404
405 if (task->next() != NULL) {
406 task->next()->set_prev(task->prev());
407 } else {
408 // max is the last element
409 assert(task == _last, "Sanity");
410 _last = task->prev();
411 }
412 --_size;
413 }
414
415 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
416 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
417 remove(task);
418
419 // Enqueue the task for reclamation (should be done outside MCQ lock)
420 task->set_next(_first_stale);
421 task->set_prev(NULL);
422 _first_stale = task;
423 }
424
425 // methods in the compile queue need to be marked as used on the stack
426 // so that they don't get reclaimed by Redefine Classes
427 void CompileQueue::mark_on_stack() {
428 CompileTask* task = _first;
429 while (task != NULL) {
430 task->mark_on_stack();
431 task = task->next();
432 }
433 }
434
435
436 CompileQueue* CompileBroker::compile_queue(int comp_level) {
437 if (is_c2_compile(comp_level)) return _c2_compile_queue;
438 if (is_c1_compile(comp_level)) return _c1_compile_queue;
439 return NULL;
440 }
441
442
443 void CompileBroker::print_compile_queues(outputStream* st) {
444 MutexLocker locker(MethodCompileQueue_lock);
445 if (_c1_compile_queue != NULL) {
446 _c1_compile_queue->print(st);
447 }
448 if (_c2_compile_queue != NULL) {
449 _c2_compile_queue->print(st);
450 }
451 }
452
453 void CompileQueue::print(outputStream* st) {
454 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
455 st->print_cr("Contents of %s", name());
456 st->print_cr("----------------------------");
457 CompileTask* task = _first;
458 if (task == NULL) {
459 st->print_cr("Empty");
460 } else {
461 while (task != NULL) {
462 task->print(st, NULL, true, true);
463 task = task->next();
464 }
465 }
466 st->print_cr("----------------------------");
467 }
468
469 void CompileQueue::print_tty() {
470 ttyLocker ttyl;
471 print(tty);
472 }
473
474 CompilerCounters::CompilerCounters() {
475 _current_method[0] = '\0';
476 _compile_type = CompileBroker::no_compile;
477 }
478
479 // ------------------------------------------------------------------
480 // CompileBroker::compilation_init
481 //
482 // Initialize the Compilation object
483 void CompileBroker::compilation_init() {
484 _last_method_compiled[0] = '\0';
485
486 // No need to initialize compilation system if we do not use it.
487 if (!UseCompiler) {
488 return;
489 }
490 #ifndef SHARK
491 // Set the interface to the current compiler(s).
492 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
493 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
494
495 #if INCLUDE_JVMCI
496 if (EnableJVMCI) {
497 // This is creating a JVMCICompiler singleton.
498 JVMCICompiler* jvmci = new JVMCICompiler();
499
500 if (UseJVMCICompiler) {
501 _compilers[1] = jvmci;
502 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
503 if (BootstrapJVMCI) {
504 // JVMCI will bootstrap so give it more threads
505 c2_count = MIN2(32, os::active_processor_count());
506 }
507 } else {
508 c2_count = JVMCIThreads;
509 }
510 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
511 } else {
512 c1_count = JVMCIHostThreads;
513 }
514 }
515 }
516 #endif // INCLUDE_JVMCI
517
518 #ifdef COMPILER1
519 if (c1_count > 0) {
520 _compilers[0] = new Compiler();
521 }
522 #endif // COMPILER1
523
524 #ifdef COMPILER2
525 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
526 if (c2_count > 0) {
527 _compilers[1] = new C2Compiler();
528 }
529 }
530 #endif // COMPILER2
531
532 #else // SHARK
533 int c1_count = 0;
534 int c2_count = 1;
535
536 _compilers[1] = new SharkCompiler();
537 #endif // SHARK
538
539 // Start the compiler thread(s) and the sweeper thread
540 init_compiler_sweeper_threads(c1_count, c2_count);
541 // totalTime performance counter is always created as it is required
542 // by the implementation of java.lang.management.CompilationMBean.
543 {
544 EXCEPTION_MARK;
545 _perf_total_compilation =
546 PerfDataManager::create_counter(JAVA_CI, "totalTime",
547 PerfData::U_Ticks, CHECK);
548 }
549
550
551 if (UsePerfData) {
552
553 EXCEPTION_MARK;
554
555 // create the jvmstat performance counters
556 _perf_osr_compilation =
557 PerfDataManager::create_counter(SUN_CI, "osrTime",
558 PerfData::U_Ticks, CHECK);
559
560 _perf_standard_compilation =
561 PerfDataManager::create_counter(SUN_CI, "standardTime",
562 PerfData::U_Ticks, CHECK);
563
564 _perf_total_bailout_count =
565 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
566 PerfData::U_Events, CHECK);
567
568 _perf_total_invalidated_count =
569 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
570 PerfData::U_Events, CHECK);
571
572 _perf_total_compile_count =
573 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
574 PerfData::U_Events, CHECK);
575 _perf_total_osr_compile_count =
576 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
577 PerfData::U_Events, CHECK);
578
579 _perf_total_standard_compile_count =
580 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
581 PerfData::U_Events, CHECK);
582
583 _perf_sum_osr_bytes_compiled =
584 PerfDataManager::create_counter(SUN_CI, "osrBytes",
585 PerfData::U_Bytes, CHECK);
586
587 _perf_sum_standard_bytes_compiled =
588 PerfDataManager::create_counter(SUN_CI, "standardBytes",
589 PerfData::U_Bytes, CHECK);
590
591 _perf_sum_nmethod_size =
592 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
593 PerfData::U_Bytes, CHECK);
594
595 _perf_sum_nmethod_code_size =
596 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
597 PerfData::U_Bytes, CHECK);
598
599 _perf_last_method =
600 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
601 CompilerCounters::cmname_buffer_length,
602 "", CHECK);
603
604 _perf_last_failed_method =
605 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
606 CompilerCounters::cmname_buffer_length,
607 "", CHECK);
608
609 _perf_last_invalidated_method =
610 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
611 CompilerCounters::cmname_buffer_length,
612 "", CHECK);
613
614 _perf_last_compile_type =
615 PerfDataManager::create_variable(SUN_CI, "lastType",
616 PerfData::U_None,
617 (jlong)CompileBroker::no_compile,
618 CHECK);
619
620 _perf_last_compile_size =
621 PerfDataManager::create_variable(SUN_CI, "lastSize",
622 PerfData::U_Bytes,
623 (jlong)CompileBroker::no_compile,
624 CHECK);
625
626
627 _perf_last_failed_type =
628 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
629 PerfData::U_None,
630 (jlong)CompileBroker::no_compile,
631 CHECK);
632
633 _perf_last_invalidated_type =
634 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
635 PerfData::U_None,
636 (jlong)CompileBroker::no_compile,
637 CHECK);
638 }
639
640 _initialized = true;
641 }
642
643
644 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
645 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
646 JavaThread* thread = NULL;
647 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
648 instanceKlassHandle klass (THREAD, k);
649 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
650 Handle string = java_lang_String::create_from_str(name, CHECK_0);
651
652 // Initialize thread_oop to put it into the system threadGroup
653 Handle thread_group (THREAD, Universe::system_thread_group());
654 JavaValue result(T_VOID);
655 JavaCalls::call_special(&result, thread_oop,
656 klass,
657 vmSymbols::object_initializer_name(),
658 vmSymbols::threadgroup_string_void_signature(),
659 thread_group,
660 string,
661 CHECK_0);
662
663 {
664 MutexLocker mu(Threads_lock, THREAD);
665 if (compiler_thread) {
666 thread = new CompilerThread(queue, counters);
667 } else {
668 thread = new CodeCacheSweeperThread();
669 }
670 // At this point the new CompilerThread data-races with this startup
671 // thread (which I believe is the primoridal thread and NOT the VM
672 // thread). This means Java bytecodes being executed at startup can
673 // queue compile jobs which will run at whatever default priority the
674 // newly created CompilerThread runs at.
675
676
677 // At this point it may be possible that no osthread was created for the
678 // JavaThread due to lack of memory. We would have to throw an exception
679 // in that case. However, since this must work and we do not allow
680 // exceptions anyway, check and abort if this fails.
681
682 if (thread == NULL || thread->osthread() == NULL) {
683 vm_exit_during_initialization("java.lang.OutOfMemoryError",
684 os::native_thread_creation_failed_msg());
685 }
686
687 java_lang_Thread::set_thread(thread_oop(), thread);
688
689 // Note that this only sets the JavaThread _priority field, which by
690 // definition is limited to Java priorities and not OS priorities.
691 // The os-priority is set in the CompilerThread startup code itself
692
693 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
694
695 // Note that we cannot call os::set_priority because it expects Java
696 // priorities and we are *explicitly* using OS priorities so that it's
697 // possible to set the compiler thread priority higher than any Java
698 // thread.
699
700 int native_prio = CompilerThreadPriority;
701 if (native_prio == -1) {
702 if (UseCriticalCompilerThreadPriority) {
703 native_prio = os::java_to_os_priority[CriticalPriority];
704 } else {
705 native_prio = os::java_to_os_priority[NearMaxPriority];
706 }
707 }
708 os::set_native_priority(thread, native_prio);
709
710 java_lang_Thread::set_daemon(thread_oop());
711
712 thread->set_threadObj(thread_oop());
713 if (compiler_thread) {
714 thread->as_CompilerThread()->set_compiler(comp);
715 }
716 Threads::add(thread);
717 Thread::start(thread);
718 }
719
720 // Let go of Threads_lock before yielding
721 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
722
723 return thread;
724 }
725
726
727 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
728 EXCEPTION_MARK;
729 #if !defined(ZERO) && !defined(SHARK)
730 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
731 #endif // !ZERO && !SHARK
732 // Initialize the compilation queue
733 if (c2_compiler_count > 0) {
734 _c2_compile_queue = new CompileQueue("C2 compile queue");
735 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
736 }
737 if (c1_compiler_count > 0) {
738 _c1_compile_queue = new CompileQueue("C1 compile queue");
739 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
740 }
741
742 int compiler_count = c1_compiler_count + c2_compiler_count;
743
744 char name_buffer[256];
745 const bool compiler_thread = true;
746 for (int i = 0; i < c2_compiler_count; i++) {
747 // Create a name for our thread.
748 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
749 CompilerCounters* counters = new CompilerCounters();
750 // Shark and C2
751 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
752 }
753
754 for (int i = c2_compiler_count; i < compiler_count; i++) {
755 // Create a name for our thread.
756 sprintf(name_buffer, "C1 CompilerThread%d", i);
757 CompilerCounters* counters = new CompilerCounters();
758 // C1
759 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
760 }
761
762 if (UsePerfData) {
763 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
764 }
765
766 if (MethodFlushing) {
767 // Initialize the sweeper thread
768 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
769 }
770 }
771
772
773 /**
774 * Set the methods on the stack as on_stack so that redefine classes doesn't
775 * reclaim them. This method is executed at a safepoint.
776 */
777 void CompileBroker::mark_on_stack() {
778 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
779 // Since we are at a safepoint, we do not need a lock to access
780 // the compile queues.
781 if (_c2_compile_queue != NULL) {
782 _c2_compile_queue->mark_on_stack();
783 }
784 if (_c1_compile_queue != NULL) {
785 _c1_compile_queue->mark_on_stack();
786 }
787 }
788
789 // ------------------------------------------------------------------
790 // CompileBroker::compile_method
791 //
792 // Request compilation of a method.
793 void CompileBroker::compile_method_base(methodHandle method,
794 int osr_bci,
795 int comp_level,
796 methodHandle hot_method,
797 int hot_count,
798 const char* comment,
799 Thread* thread) {
800 // do nothing if compiler thread(s) is not available
801 if (!_initialized) {
802 return;
803 }
804
805 guarantee(!method->is_abstract(), "cannot compile abstract methods");
806 assert(method->method_holder()->oop_is_instance(),
807 "sanity check");
808 assert(!method->method_holder()->is_not_initialized(),
809 "method holder must be initialized");
810 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
811
812 if (CIPrintRequests) {
813 tty->print("request: ");
814 method->print_short_name(tty);
815 if (osr_bci != InvocationEntryBci) {
816 tty->print(" osr_bci: %d", osr_bci);
817 }
818 tty->print(" level: %d comment: %s count: %d", comp_level, comment, hot_count);
819 if (!hot_method.is_null()) {
820 tty->print(" hot: ");
821 if (hot_method() != method()) {
822 hot_method->print_short_name(tty);
823 } else {
824 tty->print("yes");
825 }
826 }
827 tty->cr();
828 }
829
830 // A request has been made for compilation. Before we do any
831 // real work, check to see if the method has been compiled
832 // in the meantime with a definitive result.
833 if (compilation_is_complete(method, osr_bci, comp_level)) {
834 return;
835 }
836
837 #ifndef PRODUCT
838 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
839 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
840 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
841 return;
842 }
843 }
844 #endif
845
846 // If this method is already in the compile queue, then
847 // we do not block the current thread.
848 if (compilation_is_in_queue(method)) {
849 // We may want to decay our counter a bit here to prevent
850 // multiple denied requests for compilation. This is an
851 // open compilation policy issue. Note: The other possibility,
852 // in the case that this is a blocking compile request, is to have
853 // all subsequent blocking requesters wait for completion of
854 // ongoing compiles. Note that in this case we'll need a protocol
855 // for freeing the associated compile tasks. [Or we could have
856 // a single static monitor on which all these waiters sleep.]
857 return;
858 }
859
860 // If the requesting thread is holding the pending list lock
861 // then we just return. We can't risk blocking while holding
862 // the pending list lock or a 3-way deadlock may occur
863 // between the reference handler thread, a GC (instigated
864 // by a compiler thread), and compiled method registration.
865 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
866 return;
867 }
868
869 if (TieredCompilation) {
870 // Tiered policy requires MethodCounters to exist before adding a method to
871 // the queue. Create if we don't have them yet.
872 method->get_method_counters(thread);
873 }
874
875 // Outputs from the following MutexLocker block:
876 CompileTask* task = NULL;
877 bool blocking = false;
878 CompileQueue* queue = compile_queue(comp_level);
879
880 // Acquire our lock.
881 {
882 MutexLocker locker(MethodCompileQueue_lock, thread);
883
884 // Make sure the method has not slipped into the queues since
885 // last we checked; note that those checks were "fast bail-outs".
886 // Here we need to be more careful, see 14012000 below.
887 if (compilation_is_in_queue(method)) {
888 return;
889 }
890
891 // We need to check again to see if the compilation has
892 // completed. A previous compilation may have registered
893 // some result.
894 if (compilation_is_complete(method, osr_bci, comp_level)) {
895 return;
896 }
897
898 // We now know that this compilation is not pending, complete,
899 // or prohibited. Assign a compile_id to this compilation
900 // and check to see if it is in our [Start..Stop) range.
901 int compile_id = assign_compile_id(method, osr_bci);
902 if (compile_id == 0) {
903 // The compilation falls outside the allowed range.
904 return;
905 }
906
907 // Should this thread wait for completion of the compile?
908 blocking = is_compile_blocking();
909
910 #if INCLUDE_JVMCI
911 if (UseJVMCICompiler) {
912 if (blocking) {
913 // Don't allow blocking compiles for requests triggered by JVMCI.
914 if (thread->is_Compiler_thread()) {
915 blocking = false;
916 }
917
918 // Don't allow blocking compiles if inside a class initializer or while performing class loading
919 vframeStream vfst((JavaThread*) thread);
920 for (; !vfst.at_end(); vfst.next()) {
921 if (vfst.method()->is_static_initializer() ||
922 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
923 vfst.method()->name() == vmSymbols::loadClass_name())) {
924 blocking = false;
925 break;
926 }
927 }
928
929 // Don't allow blocking compilation requests to JVMCI
930 // if JVMCI itself is not yet initialized
931 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
932 blocking = false;
933 }
934
935 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
936 // to avoid deadlock between compiler thread(s) and threads run at shutdown
937 // such as the DestroyJavaVM thread.
938 if (JVMCIRuntime::shutdown_called()) {
939 blocking = false;
940 }
941 }
942 }
943 #endif // INCLUDE_JVMCI
944
945 // We will enter the compilation in the queue.
946 // 14012000: Note that this sets the queued_for_compile bits in
947 // the target method. We can now reason that a method cannot be
948 // queued for compilation more than once, as follows:
949 // Before a thread queues a task for compilation, it first acquires
950 // the compile queue lock, then checks if the method's queued bits
951 // are set or it has already been compiled. Thus there can not be two
952 // instances of a compilation task for the same method on the
953 // compilation queue. Consider now the case where the compilation
954 // thread has already removed a task for that method from the queue
955 // and is in the midst of compiling it. In this case, the
956 // queued_for_compile bits must be set in the method (and these
957 // will be visible to the current thread, since the bits were set
958 // under protection of the compile queue lock, which we hold now.
959 // When the compilation completes, the compiler thread first sets
960 // the compilation result and then clears the queued_for_compile
961 // bits. Neither of these actions are protected by a barrier (or done
962 // under the protection of a lock), so the only guarantee we have
963 // (on machines with TSO (Total Store Order)) is that these values
964 // will update in that order. As a result, the only combinations of
965 // these bits that the current thread will see are, in temporal order:
966 // <RESULT, QUEUE> :
967 // <0, 1> : in compile queue, but not yet compiled
968 // <1, 1> : compiled but queue bit not cleared
969 // <1, 0> : compiled and queue bit cleared
970 // Because we first check the queue bits then check the result bits,
971 // we are assured that we cannot introduce a duplicate task.
972 // Note that if we did the tests in the reverse order (i.e. check
973 // result then check queued bit), we could get the result bit before
974 // the compilation completed, and the queue bit after the compilation
975 // completed, and end up introducing a "duplicate" (redundant) task.
976 // In that case, the compiler thread should first check if a method
977 // has already been compiled before trying to compile it.
978 // NOTE: in the event that there are multiple compiler threads and
979 // there is de-optimization/recompilation, things will get hairy,
980 // and in that case it's best to protect both the testing (here) of
981 // these bits, and their updating (here and elsewhere) under a
982 // common lock.
983 task = create_compile_task(queue,
984 compile_id, method,
985 osr_bci, comp_level,
986 hot_method, hot_count, comment,
987 blocking);
988 }
989
990 if (blocking) {
991 wait_for_completion(task);
992 }
993 }
994
995
996 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
997 int comp_level,
998 methodHandle hot_method, int hot_count,
999 const char* comment, Thread* THREAD) {
1000 // make sure arguments make sense
1001 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1002 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1003 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1004 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1005 // allow any levels for WhiteBox
1006 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1007 // return quickly if possible
1008
1009 // lock, make sure that the compilation
1010 // isn't prohibited in a straightforward way.
1011 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1012 if (comp == NULL || !comp->can_compile_method(method) ||
1013 compilation_is_prohibited(method, osr_bci, comp_level)) {
1014 return NULL;
1015 }
1016
1017 if (osr_bci == InvocationEntryBci) {
1018 // standard compilation
1019 nmethod* method_code = method->code();
1020 if (method_code != NULL) {
1021 if (compilation_is_complete(method, osr_bci, comp_level)) {
1022 return method_code;
1023 }
1024 }
1025 if (method->is_not_compilable(comp_level)) {
1026 return NULL;
1027 }
1028 } else {
1029 // osr compilation
1030 #ifndef TIERED
1031 // seems like an assert of dubious value
1032 assert(comp_level == CompLevel_highest_tier,
1033 "all OSR compiles are assumed to be at a single compilation level");
1034 #endif // TIERED
1035 // We accept a higher level osr method
1036 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1037 if (nm != NULL) return nm;
1038 if (method->is_not_osr_compilable(comp_level)) return NULL;
1039 }
1040
1041 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1042 // some prerequisites that are compiler specific
1043 if (comp->is_c2() || comp->is_shark()) {
1044 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1045 // Resolve all classes seen in the signature of the method
1046 // we are compiling.
1047 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1048 }
1049
1050 // If the method is native, do the lookup in the thread requesting
1051 // the compilation. Native lookups can load code, which is not
1052 // permitted during compilation.
1053 //
1054 // Note: A native method implies non-osr compilation which is
1055 // checked with an assertion at the entry of this method.
1056 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1057 bool in_base_library;
1058 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1059 if (HAS_PENDING_EXCEPTION) {
1060 // In case of an exception looking up the method, we just forget
1061 // about it. The interpreter will kick-in and throw the exception.
1062 method->set_not_compilable(); // implies is_not_osr_compilable()
1063 CLEAR_PENDING_EXCEPTION;
1064 return NULL;
1065 }
1066 assert(method->has_native_function(), "must have native code by now");
1067 }
1068
1069 // RedefineClasses() has replaced this method; just return
1070 if (method->is_old()) {
1071 return NULL;
1072 }
1073
1074 // JVMTI -- post_compile_event requires jmethod_id() that may require
1075 // a lock the compiling thread can not acquire. Prefetch it here.
1076 if (JvmtiExport::should_post_compiled_method_load()) {
1077 method->jmethod_id();
1078 }
1079
1080 // do the compilation
1081 if (method->is_native()) {
1082 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1083 // The following native methods:
1084 //
1085 // java.lang.Float.intBitsToFloat
1086 // java.lang.Float.floatToRawIntBits
1087 // java.lang.Double.longBitsToDouble
1088 // java.lang.Double.doubleToRawLongBits
1089 //
1090 // are called through the interpreter even if interpreter native stubs
1091 // are not preferred (i.e., calling through adapter handlers is preferred).
1092 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1093 // if the version of the methods from the native libraries is called.
1094 // As the interpreter and the C2-intrinsified version of the methods preserves
1095 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1096 if ((UseSSE >= 1 &&
1097 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1098 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1099 (UseSSE >= 2 &&
1100 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1101 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1102 return NULL;
1103 }
1104
1105 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1106 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1107 //
1108 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1109 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1110 AdapterHandlerLibrary::create_native_wrapper(method);
1111 } else {
1112 return NULL;
1113 }
1114 } else {
1115 // If the compiler is shut off due to code cache getting full
1116 // fail out now so blocking compiles dont hang the java thread
1117 if (!should_compile_new_jobs()) {
1118 CompilationPolicy::policy()->delay_compilation(method());
1119 return NULL;
1120 }
1121 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1122 }
1123
1124 // return requested nmethod
1125 // We accept a higher level osr method
1126 if (osr_bci == InvocationEntryBci) {
1127 return method->code();
1128 }
1129 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1130 }
1131
1132
1133 // ------------------------------------------------------------------
1134 // CompileBroker::compilation_is_complete
1135 //
1136 // See if compilation of this method is already complete.
1137 bool CompileBroker::compilation_is_complete(methodHandle method,
1138 int osr_bci,
1139 int comp_level) {
1140 bool is_osr = (osr_bci != standard_entry_bci);
1141 if (is_osr) {
1142 if (method->is_not_osr_compilable(comp_level)) {
1143 return true;
1144 } else {
1145 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1146 return (result != NULL);
1147 }
1148 } else {
1149 if (method->is_not_compilable(comp_level)) {
1150 return true;
1151 } else {
1152 nmethod* result = method->code();
1153 if (result == NULL) return false;
1154 return comp_level == result->comp_level();
1155 }
1156 }
1157 }
1158
1159
1160 /**
1161 * See if this compilation is already requested.
1162 *
1163 * Implementation note: there is only a single "is in queue" bit
1164 * for each method. This means that the check below is overly
1165 * conservative in the sense that an osr compilation in the queue
1166 * will block a normal compilation from entering the queue (and vice
1167 * versa). This can be remedied by a full queue search to disambiguate
1168 * cases. If it is deemed profitable, this may be done.
1169 */
1170 bool CompileBroker::compilation_is_in_queue(methodHandle method) {
1171 return method->queued_for_compilation();
1172 }
1173
1174 // ------------------------------------------------------------------
1175 // CompileBroker::compilation_is_prohibited
1176 //
1177 // See if this compilation is not allowed.
1178 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1179 bool is_native = method->is_native();
1180 // Some compilers may not support the compilation of natives.
1181 AbstractCompiler *comp = compiler(comp_level);
1182 if (is_native &&
1183 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1184 method->set_not_compilable_quietly(comp_level);
1185 return true;
1186 }
1187
1188 bool is_osr = (osr_bci != standard_entry_bci);
1189 // Some compilers may not support on stack replacement.
1190 if (is_osr &&
1191 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1192 method->set_not_osr_compilable(comp_level);
1193 return true;
1194 }
1195
1196 // Breaking the abstraction - directives are only used inside a compilation otherwise.
1197 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1198 bool excluded = directive->ExcludeOption;
1199 DirectivesStack::release(directive);
1200
1201 // The method may be explicitly excluded by the user.
1202 double scale;
1203 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1204 bool quietly = CompilerOracle::should_exclude_quietly();
1205 if (PrintCompilation && !quietly) {
1206 // This does not happen quietly...
1207 ResourceMark rm;
1208 tty->print("### Excluding %s:%s",
1209 method->is_native() ? "generation of native wrapper" : "compile",
1210 (method->is_static() ? " static" : ""));
1211 method->print_short_name(tty);
1212 tty->cr();
1213 }
1214 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1215 }
1216
1217 return false;
1218 }
1219
1220 /**
1221 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1222 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1223 * The function also allows to generate separate compilation IDs for OSR compilations.
1224 */
1225 int CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1226 #ifdef ASSERT
1227 bool is_osr = (osr_bci != standard_entry_bci);
1228 int id;
1229 if (method->is_native()) {
1230 assert(!is_osr, "can't be osr");
1231 // Adapters, native wrappers and method handle intrinsics
1232 // should be generated always.
1233 return Atomic::add(1, &_compilation_id);
1234 } else if (CICountOSR && is_osr) {
1235 id = Atomic::add(1, &_osr_compilation_id);
1236 if (CIStartOSR <= id && id < CIStopOSR) {
1237 return id;
1238 }
1239 } else {
1240 id = Atomic::add(1, &_compilation_id);
1241 if (CIStart <= id && id < CIStop) {
1242 return id;
1243 }
1244 }
1245
1246 // Method was not in the appropriate compilation range.
1247 method->set_not_compilable_quietly();
1248 return 0;
1249 #else
1250 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1251 // only _compilation_id is incremented.
1252 return Atomic::add(1, &_compilation_id);
1253 #endif
1254 }
1255
1256 // ------------------------------------------------------------------
1257 // CompileBroker::assign_compile_id_unlocked
1258 //
1259 // Public wrapper for assign_compile_id that acquires the needed locks
1260 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, methodHandle method, int osr_bci) {
1261 MutexLocker locker(MethodCompileQueue_lock, thread);
1262 return assign_compile_id(method, osr_bci);
1263 }
1264
1265 /**
1266 * Should the current thread block until this compilation request
1267 * has been fulfilled?
1268 */
1269 bool CompileBroker::is_compile_blocking() {
1270 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1271 return !BackgroundCompilation;
1272 }
1273
1274
1275 // ------------------------------------------------------------------
1276 // CompileBroker::preload_classes
1277 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1278 // Move this code over from c1_Compiler.cpp
1279 ShouldNotReachHere();
1280 }
1281
1282
1283 // ------------------------------------------------------------------
1284 // CompileBroker::create_compile_task
1285 //
1286 // Create a CompileTask object representing the current request for
1287 // compilation. Add this task to the queue.
1288 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1289 int compile_id,
1290 methodHandle method,
1291 int osr_bci,
1292 int comp_level,
1293 methodHandle hot_method,
1294 int hot_count,
1295 const char* comment,
1296 bool blocking) {
1297 CompileTask* new_task = CompileTask::allocate();
1298 new_task->initialize(compile_id, method, osr_bci, comp_level,
1299 hot_method, hot_count, comment,
1300 blocking);
1301 queue->add(new_task);
1302 return new_task;
1303 }
1304
1305
1306 /**
1307 * Wait for the compilation task to complete.
1308 */
1309 void CompileBroker::wait_for_completion(CompileTask* task) {
1310 if (CIPrintCompileQueue) {
1311 ttyLocker ttyl;
1312 tty->print_cr("BLOCKING FOR COMPILE");
1313 }
1314
1315 assert(task->is_blocking(), "can only wait on blocking task");
1316
1317 JavaThread* thread = JavaThread::current();
1318 thread->set_blocked_on_compilation(true);
1319
1320 methodHandle method(thread, task->method());
1321 {
1322 MutexLocker waiter(task->lock(), thread);
1323
1324 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1325 task->lock()->wait();
1326 }
1327 }
1328
1329 thread->set_blocked_on_compilation(false);
1330 if (is_compilation_disabled_forever()) {
1331 CompileTask::free(task);
1332 return;
1333 }
1334
1335 // It is harmless to check this status without the lock, because
1336 // completion is a stable property (until the task object is recycled).
1337 assert(task->is_complete(), "Compilation should have completed");
1338 assert(task->code_handle() == NULL, "must be reset");
1339
1340 // By convention, the waiter is responsible for recycling a
1341 // blocking CompileTask. Since there is only one waiter ever
1342 // waiting on a CompileTask, we know that no one else will
1343 // be using this CompileTask; we can free it.
1344 CompileTask::free(task);
1345 }
1346
1347 /**
1348 * Initialize compiler thread(s) + compiler object(s). The postcondition
1349 * of this function is that the compiler runtimes are initialized and that
1350 * compiler threads can start compiling.
1351 */
1352 bool CompileBroker::init_compiler_runtime() {
1353 CompilerThread* thread = CompilerThread::current();
1354 AbstractCompiler* comp = thread->compiler();
1355 // Final sanity check - the compiler object must exist
1356 guarantee(comp != NULL, "Compiler object must exist");
1357
1358 int system_dictionary_modification_counter;
1359 {
1360 MutexLocker locker(Compile_lock, thread);
1361 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1362 }
1363
1364 {
1365 // Must switch to native to allocate ci_env
1366 ThreadToNativeFromVM ttn(thread);
1367 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1368 // Cache Jvmti state
1369 ci_env.cache_jvmti_state();
1370 // Cache DTrace flags
1371 ci_env.cache_dtrace_flags();
1372
1373 // Switch back to VM state to do compiler initialization
1374 ThreadInVMfromNative tv(thread);
1375 ResetNoHandleMark rnhm;
1376
1377 if (!comp->is_shark()) {
1378 // Perform per-thread and global initializations
1379 comp->initialize();
1380 }
1381 }
1382
1383 if (comp->is_failed()) {
1384 disable_compilation_forever();
1385 // If compiler initialization failed, no compiler thread that is specific to a
1386 // particular compiler runtime will ever start to compile methods.
1387 shutdown_compiler_runtime(comp, thread);
1388 return false;
1389 }
1390
1391 // C1 specific check
1392 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1393 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1394 return false;
1395 }
1396
1397 return true;
1398 }
1399
1400 /**
1401 * If C1 and/or C2 initialization failed, we shut down all compilation.
1402 * We do this to keep things simple. This can be changed if it ever turns
1403 * out to be a problem.
1404 */
1405 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1406 // Free buffer blob, if allocated
1407 if (thread->get_buffer_blob() != NULL) {
1408 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1409 CodeCache::free(thread->get_buffer_blob());
1410 }
1411
1412 if (comp->should_perform_shutdown()) {
1413 // There are two reasons for shutting down the compiler
1414 // 1) compiler runtime initialization failed
1415 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1416 warning("%s initialization failed. Shutting down all compilers", comp->name());
1417
1418 // Only one thread per compiler runtime object enters here
1419 // Set state to shut down
1420 comp->set_shut_down();
1421
1422 // Delete all queued compilation tasks to make compiler threads exit faster.
1423 if (_c1_compile_queue != NULL) {
1424 _c1_compile_queue->free_all();
1425 }
1426
1427 if (_c2_compile_queue != NULL) {
1428 _c2_compile_queue->free_all();
1429 }
1430
1431 // Set flags so that we continue execution with using interpreter only.
1432 UseCompiler = false;
1433 UseInterpreter = true;
1434
1435 // We could delete compiler runtimes also. However, there are references to
1436 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1437 // fail. This can be done later if necessary.
1438 }
1439 }
1440
1441 // ------------------------------------------------------------------
1442 // CompileBroker::compiler_thread_loop
1443 //
1444 // The main loop run by a CompilerThread.
1445 void CompileBroker::compiler_thread_loop() {
1446 CompilerThread* thread = CompilerThread::current();
1447 CompileQueue* queue = thread->queue();
1448 // For the thread that initializes the ciObjectFactory
1449 // this resource mark holds all the shared objects
1450 ResourceMark rm;
1451
1452 // First thread to get here will initialize the compiler interface
1453
1454 if (!ciObjectFactory::is_initialized()) {
1455 ASSERT_IN_VM;
1456 MutexLocker only_one (CompileThread_lock, thread);
1457 if (!ciObjectFactory::is_initialized()) {
1458 ciObjectFactory::initialize();
1459 }
1460 }
1461
1462 // Open a log.
1463 if (LogCompilation) {
1464 init_compiler_thread_log();
1465 }
1466 CompileLog* log = thread->log();
1467 if (log != NULL) {
1468 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1469 thread->name(),
1470 os::current_thread_id(),
1471 os::current_process_id());
1472 log->stamp();
1473 log->end_elem();
1474 }
1475
1476 // If compiler thread/runtime initialization fails, exit the compiler thread
1477 if (!init_compiler_runtime()) {
1478 return;
1479 }
1480
1481 // Poll for new compilation tasks as long as the JVM runs. Compilation
1482 // should only be disabled if something went wrong while initializing the
1483 // compiler runtimes. This, in turn, should not happen. The only known case
1484 // when compiler runtime initialization fails is if there is not enough free
1485 // space in the code cache to generate the necessary stubs, etc.
1486 while (!is_compilation_disabled_forever()) {
1487 // We need this HandleMark to avoid leaking VM handles.
1488 HandleMark hm(thread);
1489
1490 CompileTask* task = queue->get();
1491 if (task == NULL) {
1492 continue;
1493 }
1494
1495 // Give compiler threads an extra quanta. They tend to be bursty and
1496 // this helps the compiler to finish up the job.
1497 if (CompilerThreadHintNoPreempt) {
1498 os::hint_no_preempt();
1499 }
1500
1501 // Assign the task to the current thread. Mark this compilation
1502 // thread as active for the profiler.
1503 CompileTaskWrapper ctw(task);
1504 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1505 task->set_code_handle(&result_handle);
1506 methodHandle method(thread, task->method());
1507
1508 // Never compile a method if breakpoints are present in it
1509 if (method()->number_of_breakpoints() == 0) {
1510 // Compile the method.
1511 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1512 invoke_compiler_on_method(task);
1513 } else {
1514 // After compilation is disabled, remove remaining methods from queue
1515 method->clear_queued_for_compilation();
1516 task->set_failure_reason("compilation is disabled");
1517 }
1518 }
1519 }
1520
1521 // Shut down compiler runtime
1522 shutdown_compiler_runtime(thread->compiler(), thread);
1523 }
1524
1525 // ------------------------------------------------------------------
1526 // CompileBroker::init_compiler_thread_log
1527 //
1528 // Set up state required by +LogCompilation.
1529 void CompileBroker::init_compiler_thread_log() {
1530 CompilerThread* thread = CompilerThread::current();
1531 char file_name[4*K];
1532 FILE* fp = NULL;
1533 intx thread_id = os::current_thread_id();
1534 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1535 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1536 if (dir == NULL) {
1537 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1538 thread_id, os::current_process_id());
1539 } else {
1540 jio_snprintf(file_name, sizeof(file_name),
1541 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1542 os::file_separator(), thread_id, os::current_process_id());
1543 }
1544
1545 fp = fopen(file_name, "wt");
1546 if (fp != NULL) {
1547 if (LogCompilation && Verbose) {
1548 tty->print_cr("Opening compilation log %s", file_name);
1549 }
1550 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1551 thread->init_log(log);
1552
1553 if (xtty != NULL) {
1554 ttyLocker ttyl;
1555 // Record any per thread log files
1556 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1557 }
1558 return;
1559 }
1560 }
1561 warning("Cannot open log file: %s", file_name);
1562 }
1563
1564 void CompileBroker::log_metaspace_failure() {
1565 const char* message = "some methods may not be compiled because metaspace "
1566 "is out of memory";
1567 if (_compilation_log != NULL) {
1568 _compilation_log->log_metaspace_failure(message);
1569 }
1570 if (PrintCompilation) {
1571 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1572 }
1573 }
1574
1575
1576 // ------------------------------------------------------------------
1577 // CompileBroker::set_should_block
1578 //
1579 // Set _should_block.
1580 // Call this from the VM, with Threads_lock held and a safepoint requested.
1581 void CompileBroker::set_should_block() {
1582 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1583 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1584 #ifndef PRODUCT
1585 if (PrintCompilation && (Verbose || WizardMode))
1586 tty->print_cr("notifying compiler thread pool to block");
1587 #endif
1588 _should_block = true;
1589 }
1590
1591 // ------------------------------------------------------------------
1592 // CompileBroker::maybe_block
1593 //
1594 // Call this from the compiler at convenient points, to poll for _should_block.
1595 void CompileBroker::maybe_block() {
1596 if (_should_block) {
1597 #ifndef PRODUCT
1598 if (PrintCompilation && (Verbose || WizardMode))
1599 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1600 #endif
1601 ThreadInVMfromNative tivfn(JavaThread::current());
1602 }
1603 }
1604
1605 // wrapper for CodeCache::print_summary()
1606 static void codecache_print(bool detailed)
1607 {
1608 ResourceMark rm;
1609 stringStream s;
1610 // Dump code cache into a buffer before locking the tty,
1611 {
1612 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1613 CodeCache::print_summary(&s, detailed);
1614 }
1615 ttyLocker ttyl;
1616 tty->print("%s", s.as_string());
1617 }
1618
1619 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1620
1621 if (success) {
1622 task->mark_success();
1623 if (ci_env != NULL) {
1624 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1625 }
1626 if (_compilation_log != NULL) {
1627 nmethod* code = task->code();
1628 if (code != NULL) {
1629 _compilation_log->log_nmethod(thread, code);
1630 }
1631 }
1632 }
1633
1634 // simulate crash during compilation
1635 assert(task->compile_id() != CICrashAt, "just as planned");
1636 if (event.should_commit()) {
1637 event.set_method(task->method());
1638 event.set_compileID(task->compile_id());
1639 event.set_compileLevel(task->comp_level());
1640 event.set_succeded(task->is_success());
1641 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1642 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1643 event.set_inlinedBytes(task->num_inlined_bytecodes());
1644 event.commit();
1645 }
1646 }
1647
1648 int DirectivesStack::_depth = 0;
1649 CompilerDirectives* DirectivesStack::_top = NULL;
1650 CompilerDirectives* DirectivesStack::_bottom = NULL;
1651
1652 // ------------------------------------------------------------------
1653 // CompileBroker::invoke_compiler_on_method
1654 //
1655 // Compile a method.
1656 //
1657 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1658 if (PrintCompilation) {
1659 ResourceMark rm;
1660 task->print_tty();
1661 }
1662 elapsedTimer time;
1663
1664 CompilerThread* thread = CompilerThread::current();
1665 ResourceMark rm(thread);
1666
1667 if (LogEvents) {
1668 _compilation_log->log_compile(thread, task);
1669 }
1670
1671 // Common flags.
1672 uint compile_id = task->compile_id();
1673 int osr_bci = task->osr_bci();
1674 bool is_osr = (osr_bci != standard_entry_bci);
1675 bool should_log = (thread->log() != NULL);
1676 bool should_break = false;
1677 int task_level = task->comp_level();
1678
1679 // Look up matching directives
1680 DirectiveSet* directive = DirectivesStack::getMatchingDirective(task->method(), compiler(task_level));
1681
1682 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1683 if (should_log && !directive->LogOption) {
1684 should_log = false;
1685 }
1686 {
1687 // create the handle inside it's own block so it can't
1688 // accidentally be referenced once the thread transitions to
1689 // native. The NoHandleMark before the transition should catch
1690 // any cases where this occurs in the future.
1691 methodHandle method(thread, task->method());
1692 assert(!method->is_native(), "no longer compile natives");
1693
1694 // Save information about this method in case of failure.
1695 set_last_compile(thread, method, is_osr, task_level);
1696
1697 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1698 }
1699
1700 // Allocate a new set of JNI handles.
1701 push_jni_handle_block();
1702 Method* target_handle = task->method();
1703 int compilable = ciEnv::MethodCompilable;
1704 AbstractCompiler *comp = compiler(task_level);
1705
1706 int system_dictionary_modification_counter;
1707 {
1708 MutexLocker locker(Compile_lock, thread);
1709 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1710 }
1711 #if INCLUDE_JVMCI
1712 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1713 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1714
1715 TraceTime t1("compilation", &time);
1716 EventCompilation event;
1717
1718 JVMCIEnv env(task, system_dictionary_modification_counter);
1719 jvmci->compile_method(target_handle, osr_bci, &env);
1720
1721 post_compile(thread, task, event, task->code() != NULL, NULL);
1722 } else
1723 #endif // INCLUDE_JVMCI
1724 {
1725
1726 NoHandleMark nhm;
1727 ThreadToNativeFromVM ttn(thread);
1728
1729 ciEnv ci_env(task, system_dictionary_modification_counter);
1730 if (should_break) {
1731 ci_env.set_break_at_compile(true);
1732 }
1733 if (should_log) {
1734 ci_env.set_log(thread->log());
1735 }
1736 assert(thread->env() == &ci_env, "set by ci_env");
1737 // The thread-env() field is cleared in ~CompileTaskWrapper.
1738
1739 // Cache Jvmti state
1740 ci_env.cache_jvmti_state();
1741
1742 // Cache DTrace flags
1743 ci_env.cache_dtrace_flags();
1744
1745 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1746
1747 TraceTime t1("compilation", &time);
1748 EventCompilation event;
1749
1750 if (comp == NULL) {
1751 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1752 } else {
1753 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1754 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1755 while (WhiteBox::compilation_locked) {
1756 locker.wait(Mutex::_no_safepoint_check_flag);
1757 }
1758 }
1759 comp->compile_method(&ci_env, target, osr_bci, directive);
1760 }
1761
1762 if (!ci_env.failing() && task->code() == NULL) {
1763 //assert(false, "compiler should always document failure");
1764 // The compiler elected, without comment, not to register a result.
1765 // Do not attempt further compilations of this method.
1766 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1767 }
1768
1769 // Copy this bit to the enclosing block:
1770 compilable = ci_env.compilable();
1771
1772 if (ci_env.failing()) {
1773 task->set_failure_reason(ci_env.failure_reason());
1774 ci_env.report_failure(ci_env.failure_reason());
1775 const char* retry_message = ci_env.retry_message();
1776 if (_compilation_log != NULL) {
1777 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1778 }
1779 if (PrintCompilation) {
1780 FormatBufferResource msg = retry_message != NULL ?
1781 FormatBufferResource("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1782 FormatBufferResource("COMPILE SKIPPED: %s", ci_env.failure_reason());
1783 task->print(tty, msg);
1784 }
1785 }
1786
1787 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1788 }
1789 DirectivesStack::release(directive);
1790 pop_jni_handle_block();
1791
1792 methodHandle method(thread, task->method());
1793
1794 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1795
1796 collect_statistics(thread, time, task);
1797
1798 if (PrintCompilation && PrintCompilation2) {
1799 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1800 tty->print("%4d ", compile_id); // print compilation number
1801 tty->print("%s ", (is_osr ? "%" : " "));
1802 if (task->code() != NULL) {
1803 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1804 }
1805 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1806 }
1807
1808 if (PrintCodeCacheOnCompilation)
1809 codecache_print(/* detailed= */ false);
1810
1811 // Disable compilation, if required.
1812 switch (compilable) {
1813 case ciEnv::MethodCompilable_never:
1814 if (is_osr)
1815 method->set_not_osr_compilable_quietly();
1816 else
1817 method->set_not_compilable_quietly();
1818 break;
1819 case ciEnv::MethodCompilable_not_at_tier:
1820 if (is_osr)
1821 method->set_not_osr_compilable_quietly(task_level);
1822 else
1823 method->set_not_compilable_quietly(task_level);
1824 break;
1825 }
1826
1827 // Note that the queued_for_compilation bits are cleared without
1828 // protection of a mutex. [They were set by the requester thread,
1829 // when adding the task to the compile queue -- at which time the
1830 // compile queue lock was held. Subsequently, we acquired the compile
1831 // queue lock to get this task off the compile queue; thus (to belabour
1832 // the point somewhat) our clearing of the bits must be occurring
1833 // only after the setting of the bits. See also 14012000 above.
1834 method->clear_queued_for_compilation();
1835
1836 #ifdef ASSERT
1837 if (CollectedHeap::fired_fake_oom()) {
1838 // The current compile received a fake OOM during compilation so
1839 // go ahead and exit the VM since the test apparently succeeded
1840 tty->print_cr("*** Shutting down VM after successful fake OOM");
1841 vm_exit(0);
1842 }
1843 #endif
1844 }
1845
1846 /**
1847 * The CodeCache is full. Print warning and disable compilation.
1848 * Schedule code cache cleaning so compilation can continue later.
1849 * This function needs to be called only from CodeCache::allocate(),
1850 * since we currently handle a full code cache uniformly.
1851 */
1852 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1853 UseInterpreter = true;
1854 if (UseCompiler || AlwaysCompileLoopMethods ) {
1855 if (xtty != NULL) {
1856 ResourceMark rm;
1857 stringStream s;
1858 // Dump code cache state into a buffer before locking the tty,
1859 // because log_state() will use locks causing lock conflicts.
1860 CodeCache::log_state(&s);
1861 // Lock to prevent tearing
1862 ttyLocker ttyl;
1863 xtty->begin_elem("code_cache_full");
1864 xtty->print("%s", s.as_string());
1865 xtty->stamp();
1866 xtty->end_elem();
1867 }
1868
1869 #ifndef PRODUCT
1870 if (CompileTheWorld || ExitOnFullCodeCache) {
1871 codecache_print(/* detailed= */ true);
1872 before_exit(JavaThread::current());
1873 exit_globals(); // will delete tty
1874 vm_direct_exit(CompileTheWorld ? 0 : 1);
1875 }
1876 #endif
1877 if (UseCodeCacheFlushing) {
1878 // Since code cache is full, immediately stop new compiles
1879 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
1880 NMethodSweeper::log_sweep("disable_compiler");
1881 }
1882 } else {
1883 disable_compilation_forever();
1884 }
1885
1886 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
1887 }
1888 }
1889
1890 // ------------------------------------------------------------------
1891 // CompileBroker::set_last_compile
1892 //
1893 // Record this compilation for debugging purposes.
1894 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1895 ResourceMark rm;
1896 char* method_name = method->name()->as_C_string();
1897 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1898 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
1899 char current_method[CompilerCounters::cmname_buffer_length];
1900 size_t maxLen = CompilerCounters::cmname_buffer_length;
1901
1902 if (UsePerfData) {
1903 const char* class_name = method->method_holder()->name()->as_C_string();
1904
1905 size_t s1len = strlen(class_name);
1906 size_t s2len = strlen(method_name);
1907
1908 // check if we need to truncate the string
1909 if (s1len + s2len + 2 > maxLen) {
1910
1911 // the strategy is to lop off the leading characters of the
1912 // class name and the trailing characters of the method name.
1913
1914 if (s2len + 2 > maxLen) {
1915 // lop of the entire class name string, let snprintf handle
1916 // truncation of the method name.
1917 class_name += s1len; // null string
1918 }
1919 else {
1920 // lop off the extra characters from the front of the class name
1921 class_name += ((s1len + s2len + 2) - maxLen);
1922 }
1923 }
1924
1925 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1926 }
1927
1928 if (CICountOSR && is_osr) {
1929 _last_compile_type = osr_compile;
1930 } else {
1931 _last_compile_type = normal_compile;
1932 }
1933 _last_compile_level = comp_level;
1934
1935 if (UsePerfData) {
1936 CompilerCounters* counters = thread->counters();
1937 counters->set_current_method(current_method);
1938 counters->set_compile_type((jlong)_last_compile_type);
1939 }
1940 }
1941
1942
1943 // ------------------------------------------------------------------
1944 // CompileBroker::push_jni_handle_block
1945 //
1946 // Push on a new block of JNI handles.
1947 void CompileBroker::push_jni_handle_block() {
1948 JavaThread* thread = JavaThread::current();
1949
1950 // Allocate a new block for JNI handles.
1951 // Inlined code from jni_PushLocalFrame()
1952 JNIHandleBlock* java_handles = thread->active_handles();
1953 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1954 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1955 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1956 thread->set_active_handles(compile_handles);
1957 }
1958
1959
1960 // ------------------------------------------------------------------
1961 // CompileBroker::pop_jni_handle_block
1962 //
1963 // Pop off the current block of JNI handles.
1964 void CompileBroker::pop_jni_handle_block() {
1965 JavaThread* thread = JavaThread::current();
1966
1967 // Release our JNI handle block
1968 JNIHandleBlock* compile_handles = thread->active_handles();
1969 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1970 thread->set_active_handles(java_handles);
1971 compile_handles->set_pop_frame_link(NULL);
1972 JNIHandleBlock::release_block(compile_handles, thread); // may block
1973 }
1974
1975 // ------------------------------------------------------------------
1976 // CompileBroker::collect_statistics
1977 //
1978 // Collect statistics about the compilation.
1979
1980 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1981 bool success = task->is_success();
1982 methodHandle method (thread, task->method());
1983 uint compile_id = task->compile_id();
1984 bool is_osr = (task->osr_bci() != standard_entry_bci);
1985 nmethod* code = task->code();
1986 CompilerCounters* counters = thread->counters();
1987
1988 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1989 MutexLocker locker(CompileStatistics_lock);
1990
1991 // _perf variables are production performance counters which are
1992 // updated regardless of the setting of the CITime and CITimeEach flags
1993 //
1994
1995 // account all time, including bailouts and failures in this counter;
1996 // C1 and C2 counters are counting both successful and unsuccessful compiles
1997 _t_total_compilation.add(time);
1998
1999 if (!success) {
2000 _total_bailout_count++;
2001 if (UsePerfData) {
2002 _perf_last_failed_method->set_value(counters->current_method());
2003 _perf_last_failed_type->set_value(counters->compile_type());
2004 _perf_total_bailout_count->inc();
2005 }
2006 _t_bailedout_compilation.add(time);
2007 } else if (code == NULL) {
2008 if (UsePerfData) {
2009 _perf_last_invalidated_method->set_value(counters->current_method());
2010 _perf_last_invalidated_type->set_value(counters->compile_type());
2011 _perf_total_invalidated_count->inc();
2012 }
2013 _total_invalidated_count++;
2014 _t_invalidated_compilation.add(time);
2015 } else {
2016 // Compilation succeeded
2017
2018 // update compilation ticks - used by the implementation of
2019 // java.lang.management.CompilationMBean
2020 _perf_total_compilation->inc(time.ticks());
2021 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2022
2023 if (CITime) {
2024 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2025 JVMCI_ONLY(CompilerStatistics* stats = compiler(task->comp_level())->stats();)
2026 if (is_osr) {
2027 _t_osr_compilation.add(time);
2028 _sum_osr_bytes_compiled += bytes_compiled;
2029 JVMCI_ONLY(stats->_osr.update(time, bytes_compiled);)
2030 } else {
2031 _t_standard_compilation.add(time);
2032 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2033 JVMCI_ONLY(stats->_standard.update(time, bytes_compiled);)
2034 }
2035 JVMCI_ONLY(stats->_nmethods_size += code->total_size();)
2036 JVMCI_ONLY(stats->_nmethods_code_size += code->insts_size();)
2037 }
2038
2039 if (UsePerfData) {
2040 // save the name of the last method compiled
2041 _perf_last_method->set_value(counters->current_method());
2042 _perf_last_compile_type->set_value(counters->compile_type());
2043 _perf_last_compile_size->set_value(method->code_size() +
2044 task->num_inlined_bytecodes());
2045 if (is_osr) {
2046 _perf_osr_compilation->inc(time.ticks());
2047 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2048 } else {
2049 _perf_standard_compilation->inc(time.ticks());
2050 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2051 }
2052 }
2053
2054 if (CITimeEach) {
2055 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2056 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2057 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2058 }
2059
2060 // Collect counts of successful compilations
2061 _sum_nmethod_size += code->total_size();
2062 _sum_nmethod_code_size += code->insts_size();
2063 _total_compile_count++;
2064
2065 if (UsePerfData) {
2066 _perf_sum_nmethod_size->inc( code->total_size());
2067 _perf_sum_nmethod_code_size->inc(code->insts_size());
2068 _perf_total_compile_count->inc();
2069 }
2070
2071 if (is_osr) {
2072 if (UsePerfData) _perf_total_osr_compile_count->inc();
2073 _total_osr_compile_count++;
2074 } else {
2075 if (UsePerfData) _perf_total_standard_compile_count->inc();
2076 _total_standard_compile_count++;
2077 }
2078 }
2079 // set the current method for the thread to null
2080 if (UsePerfData) counters->set_current_method("");
2081 }
2082
2083 const char* CompileBroker::compiler_name(int comp_level) {
2084 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2085 if (comp == NULL) {
2086 return "no compiler";
2087 } else {
2088 return (comp->name());
2089 }
2090 }
2091
2092 #if INCLUDE_JVMCI
2093 void CompileBroker::print_times(AbstractCompiler* comp) {
2094 CompilerStatistics* stats = comp->stats();
2095 tty->print_cr(" %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}",
2096 comp->name(), stats->bytes_per_second(),
2097 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2098 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2099 stats->_nmethods_size, stats->_nmethods_code_size);
2100 comp->print_timers();
2101 }
2102 #endif // INCLUDE_JVMCI
2103
2104 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2105 #if INCLUDE_JVMCI
2106 elapsedTimer standard_compilation;
2107 elapsedTimer total_compilation;
2108 elapsedTimer osr_compilation;
2109
2110 int standard_bytes_compiled = 0;
2111 int osr_bytes_compiled = 0;
2112
2113 int standard_compile_count = 0;
2114 int osr_compile_count = 0;
2115 int total_compile_count = 0;
2116
2117 int nmethods_size = 0;
2118 int nmethods_code_size = 0;
2119 bool printedHeader = false;
2120
2121 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2122 AbstractCompiler* comp = _compilers[i];
2123 if (comp != NULL) {
2124 if (per_compiler && aggregate && !printedHeader) {
2125 printedHeader = true;
2126 tty->cr();
2127 tty->print_cr("Individual compiler times (for compiled methods only)");
2128 tty->print_cr("------------------------------------------------");
2129 tty->cr();
2130 }
2131 CompilerStatistics* stats = comp->stats();
2132
2133 standard_compilation.add(stats->_standard._time);
2134 osr_compilation.add(stats->_osr._time);
2135
2136 standard_bytes_compiled += stats->_standard._bytes;
2137 osr_bytes_compiled += stats->_osr._bytes;
2138
2139 standard_compile_count += stats->_standard._count;
2140 osr_compile_count += stats->_osr._count;
2141
2142 nmethods_size += stats->_nmethods_size;
2143 nmethods_code_size += stats->_nmethods_code_size;
2144
2145 if (per_compiler) {
2146 print_times(comp);
2147 }
2148 }
2149 }
2150 total_compile_count = osr_compile_count + standard_compile_count;
2151 total_compilation.add(osr_compilation);
2152 total_compilation.add(standard_compilation);
2153
2154 // In hosted mode, print the JVMCI compiler specific counters manually.
2155 if (!UseJVMCICompiler) {
2156 JVMCICompiler::print_compilation_timers();
2157 }
2158 #else // INCLUDE_JVMCI
2159 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2160 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2161 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2162
2163 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2164 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2165
2166 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2167 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2168 int total_compile_count = CompileBroker::_total_compile_count;
2169
2170 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2171 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2172 #endif // INCLUDE_JVMCI
2173
2174 if (!aggregate) {
2175 return;
2176 }
2177 tty->cr();
2178 tty->print_cr("Accumulated compiler times");
2179 tty->print_cr("----------------------------------------------------------");
2180 //0000000000111111111122222222223333333333444444444455555555556666666666
2181 //0123456789012345678901234567890123456789012345678901234567890123456789
2182 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2183 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2184 standard_compilation.seconds(),
2185 standard_compilation.seconds() / standard_compile_count);
2186 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2187 CompileBroker::_t_bailedout_compilation.seconds(),
2188 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2189 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2190 osr_compilation.seconds(),
2191 osr_compilation.seconds() / osr_compile_count);
2192 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2193 CompileBroker::_t_invalidated_compilation.seconds(),
2194 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2195
2196 AbstractCompiler *comp = compiler(CompLevel_simple);
2197 if (comp != NULL) {
2198 tty->cr();
2199 comp->print_timers();
2200 }
2201 comp = compiler(CompLevel_full_optimization);
2202 if (comp != NULL) {
2203 tty->cr();
2204 comp->print_timers();
2205 }
2206 tty->cr();
2207 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2208 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2209 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2210 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2211 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2212 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2213 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2214 double tcs = total_compilation.seconds();
2215 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2216 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2217 tty->cr();
2218 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2219 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2220 }
2221
2222 // Debugging output for failure
2223 void CompileBroker::print_last_compile() {
2224 if ( _last_compile_level != CompLevel_none &&
2225 compiler(_last_compile_level) != NULL &&
2226 _last_method_compiled != NULL &&
2227 _last_compile_type != no_compile) {
2228 if (_last_compile_type == osr_compile) {
2229 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2230 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2231 } else {
2232 tty->print_cr("Last parse: %d+++(%d) %s",
2233 _compilation_id, _last_compile_level, _last_method_compiled);
2234 }
2235 }
2236 }
2237
2238
2239 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2240 #ifndef PRODUCT
2241 st->print_cr("Compiler thread printing unimplemented.");
2242 st->cr();
2243 #endif
2244 }
2245