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