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/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 "interpreter/linkResolver.hpp"
36 #include "memory/allocation.inline.hpp"
37 #include "oops/methodData.hpp"
38 #include "oops/method.hpp"
39 #include "oops/oop.inline.hpp"
40 #include "prims/nativeLookup.hpp"
41 #include "prims/whitebox.hpp"
42 #include "runtime/arguments.hpp"
43 #include "runtime/atomic.inline.hpp"
44 #include "runtime/compilationPolicy.hpp"
45 #include "runtime/init.hpp"
46 #include "runtime/interfaceSupport.hpp"
47 #include "runtime/javaCalls.hpp"
48 #include "runtime/os.hpp"
49 #include "runtime/sharedRuntime.hpp"
50 #include "runtime/sweeper.hpp"
51 #include "trace/tracing.hpp"
52 #include "utilities/dtrace.hpp"
53 #include "utilities/events.hpp"
54 #ifdef COMPILER1
55 #include "c1/c1_Compiler.hpp"
56 #endif
57 #if INCLUDE_JVMCI
58 #include "jvmci/jvmciCompiler.hpp"
59 #include "jvmci/jvmciRuntime.hpp"
60 #include "jvmci/jvmciJavaClasses.hpp"
61 #include "runtime/vframe.hpp"
62 #endif
63 #ifdef COMPILER2
64 #include "opto/c2compiler.hpp"
65 #endif
66 #ifdef SHARK
67 #include "shark/sharkCompiler.hpp"
68 #endif
69
70 #ifdef DTRACE_ENABLED
71
72 // Only bother with this argument setup if dtrace is available
73
74 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
75 { \
76 Symbol* klass_name = (method)->klass_name(); \
77 Symbol* name = (method)->name(); \
78 Symbol* signature = (method)->signature(); \
79 HOTSPOT_METHOD_COMPILE_BEGIN( \
80 (char *) comp_name, strlen(comp_name), \
81 (char *) klass_name->bytes(), klass_name->utf8_length(), \
82 (char *) name->bytes(), name->utf8_length(), \
83 (char *) signature->bytes(), signature->utf8_length()); \
84 }
85
86 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
87 { \
88 Symbol* klass_name = (method)->klass_name(); \
89 Symbol* name = (method)->name(); \
90 Symbol* signature = (method)->signature(); \
91 HOTSPOT_METHOD_COMPILE_END( \
92 (char *) comp_name, strlen(comp_name), \
93 (char *) klass_name->bytes(), klass_name->utf8_length(), \
94 (char *) name->bytes(), name->utf8_length(), \
95 (char *) signature->bytes(), signature->utf8_length(), (success)); \
96 }
97
98 #else // ndef DTRACE_ENABLED
99
100 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
101 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
102
103 #endif // ndef DTRACE_ENABLED
104
105 bool CompileBroker::_initialized = false;
106 volatile bool CompileBroker::_should_block = false;
107 volatile jint CompileBroker::_print_compilation_warning = 0;
108 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
109
110 // The installed compiler(s)
111 AbstractCompiler* CompileBroker::_compilers[2];
112
113 // These counters are used to assign an unique ID to each compilation.
114 volatile jint CompileBroker::_compilation_id = 0;
115 volatile jint CompileBroker::_osr_compilation_id = 0;
116
117 // Debugging information
118 int CompileBroker::_last_compile_type = no_compile;
119 int CompileBroker::_last_compile_level = CompLevel_none;
120 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
121
122 // Performance counters
123 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
124 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
125 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
126
127 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
128 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
129 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
130 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
131 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
132
133 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
134 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
135 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
136 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
137
138 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
139 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
140 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
141 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
142 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
143 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
144 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
145
146 // Timers and counters for generating statistics
147 elapsedTimer CompileBroker::_t_total_compilation;
148 elapsedTimer CompileBroker::_t_osr_compilation;
149 elapsedTimer CompileBroker::_t_standard_compilation;
150 elapsedTimer CompileBroker::_t_invalidated_compilation;
151 elapsedTimer CompileBroker::_t_bailedout_compilation;
152
153 int CompileBroker::_total_bailout_count = 0;
154 int CompileBroker::_total_invalidated_count = 0;
155 int CompileBroker::_total_compile_count = 0;
156 int CompileBroker::_total_osr_compile_count = 0;
157 int CompileBroker::_total_standard_compile_count = 0;
158
159 int CompileBroker::_sum_osr_bytes_compiled = 0;
160 int CompileBroker::_sum_standard_bytes_compiled = 0;
161 int CompileBroker::_sum_nmethod_size = 0;
162 int CompileBroker::_sum_nmethod_code_size = 0;
163
164 long CompileBroker::_peak_compilation_time = 0;
165
166 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
167 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
168
169 class CompilationLog : public StringEventLog {
170 public:
171 CompilationLog() : StringEventLog("Compilation events") {
172 }
173
174 void log_compile(JavaThread* thread, CompileTask* task) {
175 StringLogMessage lm;
176 stringStream sstr = lm.stream();
177 // msg.time_stamp().update_to(tty->time_stamp().ticks());
178 task->print(&sstr, NULL, true, false);
179 log(thread, "%s", (const char*)lm);
180 }
181
182 void log_nmethod(JavaThread* thread, nmethod* nm) {
183 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
184 nm->compile_id(), nm->is_osr_method() ? "%" : "",
185 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
186 }
187
188 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
189 StringLogMessage lm;
190 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
191 if (retry_message != NULL) {
192 lm.append(" (%s)", retry_message);
193 }
194 lm.print("\n");
195 log(thread, "%s", (const char*)lm);
196 }
197
198 void log_metaspace_failure(const char* reason) {
199 ResourceMark rm;
200 StringLogMessage lm;
201 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
202 lm.print("\n");
203 log(JavaThread::current(), "%s", (const char*)lm);
204 }
205 };
206
207 static CompilationLog* _compilation_log = NULL;
208
209 bool compileBroker_init() {
210 if (LogEvents) {
211 _compilation_log = new CompilationLog();
212 }
213
214 // init directives stack, adding default directive
215 DirectivesStack::init();
216
217 if (DirectivesParser::has_file()) {
218 return DirectivesParser::parse_from_flag();
219 } else if (CompilerDirectivesPrint) {
220 // Print default directive even when no other was added
221 DirectivesStack::print(tty);
222 }
223
224 return true;
225 }
226
227 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
228 CompilerThread* thread = CompilerThread::current();
229 thread->set_task(task);
230 #if INCLUDE_JVMCI
231 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
232 task->set_jvmci_compiler_thread(thread);
233 }
234 #endif
235 CompileLog* log = thread->log();
236 if (log != NULL) task->log_task_start(log);
237 }
238
239 CompileTaskWrapper::~CompileTaskWrapper() {
240 CompilerThread* thread = CompilerThread::current();
241 CompileTask* task = thread->task();
242 CompileLog* log = thread->log();
243 if (log != NULL) task->log_task_done(log);
244 thread->set_task(NULL);
245 task->set_code_handle(NULL);
246 thread->set_env(NULL);
247 if (task->is_blocking()) {
248 bool free_task = false;
249 {
250 MutexLocker notifier(task->lock(), thread);
251 task->mark_complete();
252 #if INCLUDE_JVMCI
253 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
254 if (!task->has_waiter()) {
255 // The waiting thread timed out and thus did not free the task.
256 free_task = true;
257 }
258 task->set_jvmci_compiler_thread(NULL);
259 }
260 #endif
261 if (!free_task) {
262 // Notify the waiting thread that the compilation has completed
263 // so that it can free the task.
264 task->lock()->notify_all();
265 }
266 }
267 if (free_task) {
268 // The task can only be freed once the task lock is released.
269 CompileTask::free(task);
270 }
271 } else {
272 task->mark_complete();
273
274 // By convention, the compiling thread is responsible for
275 // recycling a non-blocking CompileTask.
276 CompileTask::free(task);
277 }
278 }
279
280 /**
281 * Add a CompileTask to a CompileQueue.
282 */
283 void CompileQueue::add(CompileTask* task) {
284 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
285
286 task->set_next(NULL);
287 task->set_prev(NULL);
288
289 if (_last == NULL) {
290 // The compile queue is empty.
291 assert(_first == NULL, "queue is empty");
292 _first = task;
293 _last = task;
294 } else {
295 // Append the task to the queue.
296 assert(_last->next() == NULL, "not last");
297 _last->set_next(task);
298 task->set_prev(_last);
299 _last = task;
300 }
301 ++_size;
302
303 // Mark the method as being in the compile queue.
304 task->method()->set_queued_for_compilation();
305
306 if (CIPrintCompileQueue) {
307 print_tty();
308 }
309
310 if (LogCompilation && xtty != NULL) {
311 task->log_task_queued();
312 }
313
314 // Notify CompilerThreads that a task is available.
315 MethodCompileQueue_lock->notify_all();
316 }
317
318 /**
319 * Empties compilation queue by putting all compilation tasks onto
320 * a freelist. Furthermore, the method wakes up all threads that are
321 * waiting on a compilation task to finish. This can happen if background
322 * compilation is disabled.
323 */
324 void CompileQueue::free_all() {
325 MutexLocker mu(MethodCompileQueue_lock);
326 CompileTask* next = _first;
327
328 // Iterate over all tasks in the compile queue
329 while (next != NULL) {
330 CompileTask* current = next;
331 next = current->next();
332 {
333 // Wake up thread that blocks on the compile task.
334 MutexLocker ct_lock(current->lock());
335 current->lock()->notify();
336 }
337 // Put the task back on the freelist.
338 CompileTask::free(current);
339 }
340 _first = NULL;
341
342 // Wake up all threads that block on the queue.
343 MethodCompileQueue_lock->notify_all();
344 }
345
346 /**
347 * Get the next CompileTask from a CompileQueue
348 */
349 CompileTask* CompileQueue::get() {
350 // save methods from RedefineClasses across safepoint
351 // across MethodCompileQueue_lock below.
352 methodHandle save_method;
353 methodHandle save_hot_method;
354
355 MutexLocker locker(MethodCompileQueue_lock);
356 // If _first is NULL we have no more compile jobs. There are two reasons for
357 // having no compile jobs: First, we compiled everything we wanted. Second,
358 // we ran out of code cache so compilation has been disabled. In the latter
359 // case we perform code cache sweeps to free memory such that we can re-enable
360 // compilation.
361 while (_first == NULL) {
362 // Exit loop if compilation is disabled forever
363 if (CompileBroker::is_compilation_disabled_forever()) {
364 return NULL;
365 }
366
367 // If there are no compilation tasks and we can compile new jobs
368 // (i.e., there is enough free space in the code cache) there is
369 // no need to invoke the sweeper. As a result, the hotness of methods
370 // remains unchanged. This behavior is desired, since we want to keep
371 // the stable state, i.e., we do not want to evict methods from the
372 // code cache if it is unnecessary.
373 // We need a timed wait here, since compiler threads can exit if compilation
374 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
375 // is not critical and we do not want idle compiler threads to wake up too often.
376 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
377 }
378
379 if (CompileBroker::is_compilation_disabled_forever()) {
380 return NULL;
381 }
382
383 CompileTask* task;
384 {
385 NoSafepointVerifier nsv;
386 task = CompilationPolicy::policy()->select_task(this);
387 }
388
389 // Save method pointers across unlock safepoint. The task is removed from
390 // the compilation queue, which is walked during RedefineClasses.
391 save_method = methodHandle(task->method());
392 save_hot_method = methodHandle(task->hot_method());
393
394 remove(task);
395 purge_stale_tasks(); // may temporarily release MCQ lock
396 return task;
397 }
398
399 // Clean & deallocate stale compile tasks.
400 // Temporarily releases MethodCompileQueue lock.
401 void CompileQueue::purge_stale_tasks() {
402 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
403 if (_first_stale != NULL) {
404 // Stale tasks are purged when MCQ lock is released,
405 // but _first_stale updates are protected by MCQ lock.
406 // Once task processing starts and MCQ lock is released,
407 // other compiler threads can reuse _first_stale.
408 CompileTask* head = _first_stale;
409 _first_stale = NULL;
410 {
411 MutexUnlocker ul(MethodCompileQueue_lock);
412 for (CompileTask* task = head; task != NULL; ) {
413 CompileTask* next_task = task->next();
414 CompileTaskWrapper ctw(task); // Frees the task
415 task->set_failure_reason("stale task");
416 task = next_task;
417 }
418 }
419 }
420 }
421
422 void CompileQueue::remove(CompileTask* task) {
423 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
424 if (task->prev() != NULL) {
425 task->prev()->set_next(task->next());
426 } else {
427 // max is the first element
428 assert(task == _first, "Sanity");
429 _first = task->next();
430 }
431
432 if (task->next() != NULL) {
433 task->next()->set_prev(task->prev());
434 } else {
435 // max is the last element
436 assert(task == _last, "Sanity");
437 _last = task->prev();
438 }
439 --_size;
440 }
441
442 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
443 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
444 remove(task);
445
446 // Enqueue the task for reclamation (should be done outside MCQ lock)
447 task->set_next(_first_stale);
448 task->set_prev(NULL);
449 _first_stale = task;
450 }
451
452 // methods in the compile queue need to be marked as used on the stack
453 // so that they don't get reclaimed by Redefine Classes
454 void CompileQueue::mark_on_stack() {
455 CompileTask* task = _first;
456 while (task != NULL) {
457 task->mark_on_stack();
458 task = task->next();
459 }
460 }
461
462
463 CompileQueue* CompileBroker::compile_queue(int comp_level) {
464 if (is_c2_compile(comp_level)) return _c2_compile_queue;
465 if (is_c1_compile(comp_level)) return _c1_compile_queue;
466 return NULL;
467 }
468
469 void CompileBroker::print_compile_queues(outputStream* st) {
470 st->print_cr("Current compiles: ");
471 MutexLocker locker(MethodCompileQueue_lock);
472 MutexLocker locker2(Threads_lock);
473
474 char buf[2000];
475 int buflen = sizeof(buf);
476 Threads::print_threads_compiling(st, buf, buflen);
477
478 st->cr();
479 if (_c1_compile_queue != NULL) {
480 _c1_compile_queue->print(st);
481 }
482 if (_c2_compile_queue != NULL) {
483 _c2_compile_queue->print(st);
484 }
485 }
486
487 void CompileQueue::print(outputStream* st) {
488 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
489 st->print_cr("%s:", name());
490 CompileTask* task = _first;
491 if (task == NULL) {
492 st->print_cr("Empty");
493 } else {
494 while (task != NULL) {
495 task->print(st, NULL, true, true);
496 task = task->next();
497 }
498 }
499 st->cr();
500 }
501
502 void CompileQueue::print_tty() {
503 ttyLocker ttyl;
504 print(tty);
505 }
506
507 CompilerCounters::CompilerCounters() {
508 _current_method[0] = '\0';
509 _compile_type = CompileBroker::no_compile;
510 }
511
512 // ------------------------------------------------------------------
513 // CompileBroker::compilation_init
514 //
515 // Initialize the Compilation object
516 void CompileBroker::compilation_init(TRAPS) {
517 _last_method_compiled[0] = '\0';
518
519 // No need to initialize compilation system if we do not use it.
520 if (!UseCompiler) {
521 return;
522 }
523 #ifndef SHARK
524 // Set the interface to the current compiler(s).
525 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
526 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
527
528 #if INCLUDE_JVMCI
529 if (EnableJVMCI) {
530 // This is creating a JVMCICompiler singleton.
531 JVMCICompiler* jvmci = new JVMCICompiler();
532
533 if (UseJVMCICompiler) {
534 _compilers[1] = jvmci;
535 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
536 if (BootstrapJVMCI) {
537 // JVMCI will bootstrap so give it more threads
538 c2_count = MIN2(32, os::active_processor_count());
539 }
540 } else {
541 c2_count = JVMCIThreads;
542 }
543 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
544 } else {
545 c1_count = JVMCIHostThreads;
546 }
547
548 if (!UseInterpreter || !BackgroundCompilation) {
549 // Force initialization of JVMCI compiler otherwise JVMCI
550 // compilations will not block until JVMCI is initialized
551 ResourceMark rm;
552 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
553 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
554 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
555 JavaValue result(T_OBJECT);
556 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
557 }
558 }
559 }
560 #endif // INCLUDE_JVMCI
561
562 #ifdef COMPILER1
563 if (c1_count > 0) {
564 _compilers[0] = new Compiler();
565 }
566 #endif // COMPILER1
567
568 #ifdef COMPILER2
569 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
570 if (c2_count > 0) {
571 _compilers[1] = new C2Compiler();
572 }
573 }
574 #endif // COMPILER2
575
576 #else // SHARK
577 int c1_count = 0;
578 int c2_count = 1;
579
580 _compilers[1] = new SharkCompiler();
581 #endif // SHARK
582
583 // Start the compiler thread(s) and the sweeper thread
584 init_compiler_sweeper_threads(c1_count, c2_count);
585 // totalTime performance counter is always created as it is required
586 // by the implementation of java.lang.management.CompilationMBean.
587 {
588 EXCEPTION_MARK;
589 _perf_total_compilation =
590 PerfDataManager::create_counter(JAVA_CI, "totalTime",
591 PerfData::U_Ticks, CHECK);
592 }
593
594 if (UsePerfData) {
595
596 EXCEPTION_MARK;
597
598 // create the jvmstat performance counters
599 _perf_osr_compilation =
600 PerfDataManager::create_counter(SUN_CI, "osrTime",
601 PerfData::U_Ticks, CHECK);
602
603 _perf_standard_compilation =
604 PerfDataManager::create_counter(SUN_CI, "standardTime",
605 PerfData::U_Ticks, CHECK);
606
607 _perf_total_bailout_count =
608 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
609 PerfData::U_Events, CHECK);
610
611 _perf_total_invalidated_count =
612 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
613 PerfData::U_Events, CHECK);
614
615 _perf_total_compile_count =
616 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
617 PerfData::U_Events, CHECK);
618 _perf_total_osr_compile_count =
619 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
620 PerfData::U_Events, CHECK);
621
622 _perf_total_standard_compile_count =
623 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
624 PerfData::U_Events, CHECK);
625
626 _perf_sum_osr_bytes_compiled =
627 PerfDataManager::create_counter(SUN_CI, "osrBytes",
628 PerfData::U_Bytes, CHECK);
629
630 _perf_sum_standard_bytes_compiled =
631 PerfDataManager::create_counter(SUN_CI, "standardBytes",
632 PerfData::U_Bytes, CHECK);
633
634 _perf_sum_nmethod_size =
635 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
636 PerfData::U_Bytes, CHECK);
637
638 _perf_sum_nmethod_code_size =
639 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
640 PerfData::U_Bytes, CHECK);
641
642 _perf_last_method =
643 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
644 CompilerCounters::cmname_buffer_length,
645 "", CHECK);
646
647 _perf_last_failed_method =
648 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
649 CompilerCounters::cmname_buffer_length,
650 "", CHECK);
651
652 _perf_last_invalidated_method =
653 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
654 CompilerCounters::cmname_buffer_length,
655 "", CHECK);
656
657 _perf_last_compile_type =
658 PerfDataManager::create_variable(SUN_CI, "lastType",
659 PerfData::U_None,
660 (jlong)CompileBroker::no_compile,
661 CHECK);
662
663 _perf_last_compile_size =
664 PerfDataManager::create_variable(SUN_CI, "lastSize",
665 PerfData::U_Bytes,
666 (jlong)CompileBroker::no_compile,
667 CHECK);
668
669
670 _perf_last_failed_type =
671 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
672 PerfData::U_None,
673 (jlong)CompileBroker::no_compile,
674 CHECK);
675
676 _perf_last_invalidated_type =
677 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
678 PerfData::U_None,
679 (jlong)CompileBroker::no_compile,
680 CHECK);
681 }
682
683 _initialized = true;
684 }
685
686
687 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
688 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
689 JavaThread* thread = NULL;
690 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
691 instanceKlassHandle klass (THREAD, k);
692 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
693 Handle string = java_lang_String::create_from_str(name, CHECK_0);
694
695 // Initialize thread_oop to put it into the system threadGroup
696 Handle thread_group (THREAD, Universe::system_thread_group());
697 JavaValue result(T_VOID);
698 JavaCalls::call_special(&result, thread_oop,
699 klass,
700 vmSymbols::object_initializer_name(),
701 vmSymbols::threadgroup_string_void_signature(),
702 thread_group,
703 string,
704 CHECK_0);
705
706 {
707 MutexLocker mu(Threads_lock, THREAD);
708 if (compiler_thread) {
709 thread = new CompilerThread(queue, counters);
710 } else {
711 thread = new CodeCacheSweeperThread();
712 }
713 // At this point the new CompilerThread data-races with this startup
714 // thread (which I believe is the primoridal thread and NOT the VM
715 // thread). This means Java bytecodes being executed at startup can
716 // queue compile jobs which will run at whatever default priority the
717 // newly created CompilerThread runs at.
718
719
720 // At this point it may be possible that no osthread was created for the
721 // JavaThread due to lack of memory. We would have to throw an exception
722 // in that case. However, since this must work and we do not allow
723 // exceptions anyway, check and abort if this fails.
724
725 if (thread == NULL || thread->osthread() == NULL) {
726 vm_exit_during_initialization("java.lang.OutOfMemoryError",
727 os::native_thread_creation_failed_msg());
728 }
729
730 java_lang_Thread::set_thread(thread_oop(), thread);
731
732 // Note that this only sets the JavaThread _priority field, which by
733 // definition is limited to Java priorities and not OS priorities.
734 // The os-priority is set in the CompilerThread startup code itself
735
736 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
737
738 // Note that we cannot call os::set_priority because it expects Java
739 // priorities and we are *explicitly* using OS priorities so that it's
740 // possible to set the compiler thread priority higher than any Java
741 // thread.
742
743 int native_prio = CompilerThreadPriority;
744 if (native_prio == -1) {
745 if (UseCriticalCompilerThreadPriority) {
746 native_prio = os::java_to_os_priority[CriticalPriority];
747 } else {
748 native_prio = os::java_to_os_priority[NearMaxPriority];
749 }
750 }
751 os::set_native_priority(thread, native_prio);
752
753 java_lang_Thread::set_daemon(thread_oop());
754
755 thread->set_threadObj(thread_oop());
756 if (compiler_thread) {
757 thread->as_CompilerThread()->set_compiler(comp);
758 }
759 Threads::add(thread);
760 Thread::start(thread);
761 }
762
763 // Let go of Threads_lock before yielding
764 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
765
766 return thread;
767 }
768
769
770 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
771 EXCEPTION_MARK;
772 #if !defined(ZERO) && !defined(SHARK)
773 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
774 #endif // !ZERO && !SHARK
775 // Initialize the compilation queue
776 if (c2_compiler_count > 0) {
777 _c2_compile_queue = new CompileQueue("C2 compile queue");
778 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
779 }
780 if (c1_compiler_count > 0) {
781 _c1_compile_queue = new CompileQueue("C1 compile queue");
782 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
783 }
784
785 int compiler_count = c1_compiler_count + c2_compiler_count;
786
787 char name_buffer[256];
788 const bool compiler_thread = true;
789 for (int i = 0; i < c2_compiler_count; i++) {
790 // Create a name for our thread.
791 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
792 CompilerCounters* counters = new CompilerCounters();
793 // Shark and C2
794 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
795 }
796
797 for (int i = c2_compiler_count; i < compiler_count; i++) {
798 // Create a name for our thread.
799 sprintf(name_buffer, "C1 CompilerThread%d", i);
800 CompilerCounters* counters = new CompilerCounters();
801 // C1
802 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
803 }
804
805 if (UsePerfData) {
806 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
807 }
808
809 if (MethodFlushing) {
810 // Initialize the sweeper thread
811 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
812 }
813 }
814
815
816 /**
817 * Set the methods on the stack as on_stack so that redefine classes doesn't
818 * reclaim them. This method is executed at a safepoint.
819 */
820 void CompileBroker::mark_on_stack() {
821 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
822 // Since we are at a safepoint, we do not need a lock to access
823 // the compile queues.
824 if (_c2_compile_queue != NULL) {
825 _c2_compile_queue->mark_on_stack();
826 }
827 if (_c1_compile_queue != NULL) {
828 _c1_compile_queue->mark_on_stack();
829 }
830 }
831
832 // ------------------------------------------------------------------
833 // CompileBroker::compile_method
834 //
835 // Request compilation of a method.
836 void CompileBroker::compile_method_base(const methodHandle& method,
837 int osr_bci,
838 int comp_level,
839 const methodHandle& hot_method,
840 int hot_count,
841 const char* comment,
842 Thread* thread) {
843 // do nothing if compiler thread(s) is not available
844 if (!_initialized) {
845 return;
846 }
847
848 guarantee(!method->is_abstract(), "cannot compile abstract methods");
849 assert(method->method_holder()->is_instance_klass(),
850 "sanity check");
851 assert(!method->method_holder()->is_not_initialized(),
852 "method holder must be initialized");
853 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
854
855 if (CIPrintRequests) {
856 tty->print("request: ");
857 method->print_short_name(tty);
858 if (osr_bci != InvocationEntryBci) {
859 tty->print(" osr_bci: %d", osr_bci);
860 }
861 tty->print(" level: %d comment: %s count: %d", comp_level, comment, hot_count);
862 if (!hot_method.is_null()) {
863 tty->print(" hot: ");
864 if (hot_method() != method()) {
865 hot_method->print_short_name(tty);
866 } else {
867 tty->print("yes");
868 }
869 }
870 tty->cr();
871 }
872
873 // A request has been made for compilation. Before we do any
874 // real work, check to see if the method has been compiled
875 // in the meantime with a definitive result.
876 if (compilation_is_complete(method, osr_bci, comp_level)) {
877 return;
878 }
879
880 #ifndef PRODUCT
881 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
882 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
883 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
884 return;
885 }
886 }
887 #endif
888
889 // If this method is already in the compile queue, then
890 // we do not block the current thread.
891 if (compilation_is_in_queue(method)) {
892 // We may want to decay our counter a bit here to prevent
893 // multiple denied requests for compilation. This is an
894 // open compilation policy issue. Note: The other possibility,
895 // in the case that this is a blocking compile request, is to have
896 // all subsequent blocking requesters wait for completion of
897 // ongoing compiles. Note that in this case we'll need a protocol
898 // for freeing the associated compile tasks. [Or we could have
899 // a single static monitor on which all these waiters sleep.]
900 return;
901 }
902
903 // If the requesting thread is holding the pending list lock
904 // then we just return. We can't risk blocking while holding
905 // the pending list lock or a 3-way deadlock may occur
906 // between the reference handler thread, a GC (instigated
907 // by a compiler thread), and compiled method registration.
908 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
909 return;
910 }
911
912 if (TieredCompilation) {
913 // Tiered policy requires MethodCounters to exist before adding a method to
914 // the queue. Create if we don't have them yet.
915 method->get_method_counters(thread);
916 }
917
918 // Outputs from the following MutexLocker block:
919 CompileTask* task = NULL;
920 bool blocking = false;
921 CompileQueue* queue = compile_queue(comp_level);
922
923 // Acquire our lock.
924 {
925 MutexLocker locker(MethodCompileQueue_lock, thread);
926
927 // Make sure the method has not slipped into the queues since
928 // last we checked; note that those checks were "fast bail-outs".
929 // Here we need to be more careful, see 14012000 below.
930 if (compilation_is_in_queue(method)) {
931 return;
932 }
933
934 // We need to check again to see if the compilation has
935 // completed. A previous compilation may have registered
936 // some result.
937 if (compilation_is_complete(method, osr_bci, comp_level)) {
938 return;
939 }
940
941 // We now know that this compilation is not pending, complete,
942 // or prohibited. Assign a compile_id to this compilation
943 // and check to see if it is in our [Start..Stop) range.
944 int compile_id = assign_compile_id(method, osr_bci);
945 if (compile_id == 0) {
946 // The compilation falls outside the allowed range.
947 return;
948 }
949
950 // Should this thread wait for completion of the compile?
951 blocking = is_compile_blocking();
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, comment,
1030 blocking);
1031 }
1032
1033 if (blocking) {
1034 wait_for_completion(task);
1035 }
1036 }
1037
1038
1039 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1040 int comp_level,
1041 const methodHandle& hot_method, int hot_count,
1042 const char* comment, Thread* THREAD) {
1043 // make sure arguments make sense
1044 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1045 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1046 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1047 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1048 // allow any levels for WhiteBox
1049 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1050 // return quickly if possible
1051
1052 // lock, make sure that the compilation
1053 // isn't prohibited in a straightforward way.
1054 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1055 if (comp == NULL || !comp->can_compile_method(method) ||
1056 compilation_is_prohibited(method, osr_bci, comp_level)) {
1057 return NULL;
1058 }
1059
1060 if (osr_bci == InvocationEntryBci) {
1061 // standard compilation
1062 nmethod* method_code = method->code();
1063 if (method_code != NULL) {
1064 if (compilation_is_complete(method, osr_bci, comp_level)) {
1065 return method_code;
1066 }
1067 }
1068 if (method->is_not_compilable(comp_level)) {
1069 return NULL;
1070 }
1071 } else {
1072 // osr compilation
1073 #ifndef TIERED
1074 // seems like an assert of dubious value
1075 assert(comp_level == CompLevel_highest_tier,
1076 "all OSR compiles are assumed to be at a single compilation level");
1077 #endif // TIERED
1078 // We accept a higher level osr method
1079 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1080 if (nm != NULL) return nm;
1081 if (method->is_not_osr_compilable(comp_level)) return NULL;
1082 }
1083
1084 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1085 // some prerequisites that are compiler specific
1086 if (comp->is_c2() || comp->is_shark()) {
1087 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1088 // Resolve all classes seen in the signature of the method
1089 // we are compiling.
1090 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1091 }
1092
1093 // If the method is native, do the lookup in the thread requesting
1094 // the compilation. Native lookups can load code, which is not
1095 // permitted during compilation.
1096 //
1097 // Note: A native method implies non-osr compilation which is
1098 // checked with an assertion at the entry of this method.
1099 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1100 bool in_base_library;
1101 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1102 if (HAS_PENDING_EXCEPTION) {
1103 // In case of an exception looking up the method, we just forget
1104 // about it. The interpreter will kick-in and throw the exception.
1105 method->set_not_compilable(); // implies is_not_osr_compilable()
1106 CLEAR_PENDING_EXCEPTION;
1107 return NULL;
1108 }
1109 assert(method->has_native_function(), "must have native code by now");
1110 }
1111
1112 // RedefineClasses() has replaced this method; just return
1113 if (method->is_old()) {
1114 return NULL;
1115 }
1116
1117 // JVMTI -- post_compile_event requires jmethod_id() that may require
1118 // a lock the compiling thread can not acquire. Prefetch it here.
1119 if (JvmtiExport::should_post_compiled_method_load()) {
1120 method->jmethod_id();
1121 }
1122
1123 // do the compilation
1124 if (method->is_native()) {
1125 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1126 // The following native methods:
1127 //
1128 // java.lang.Float.intBitsToFloat
1129 // java.lang.Float.floatToRawIntBits
1130 // java.lang.Double.longBitsToDouble
1131 // java.lang.Double.doubleToRawLongBits
1132 //
1133 // are called through the interpreter even if interpreter native stubs
1134 // are not preferred (i.e., calling through adapter handlers is preferred).
1135 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1136 // if the version of the methods from the native libraries is called.
1137 // As the interpreter and the C2-intrinsified version of the methods preserves
1138 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1139 if ((UseSSE >= 1 &&
1140 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1141 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1142 (UseSSE >= 2 &&
1143 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1144 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1145 return NULL;
1146 }
1147
1148 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1149 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1150 //
1151 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1152 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1153 AdapterHandlerLibrary::create_native_wrapper(method);
1154 } else {
1155 return NULL;
1156 }
1157 } else {
1158 // If the compiler is shut off due to code cache getting full
1159 // fail out now so blocking compiles dont hang the java thread
1160 if (!should_compile_new_jobs()) {
1161 CompilationPolicy::policy()->delay_compilation(method());
1162 return NULL;
1163 }
1164 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1165 }
1166
1167 // return requested nmethod
1168 // We accept a higher level osr method
1169 if (osr_bci == InvocationEntryBci) {
1170 return method->code();
1171 }
1172 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1173 }
1174
1175
1176 // ------------------------------------------------------------------
1177 // CompileBroker::compilation_is_complete
1178 //
1179 // See if compilation of this method is already complete.
1180 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1181 int osr_bci,
1182 int comp_level) {
1183 bool is_osr = (osr_bci != standard_entry_bci);
1184 if (is_osr) {
1185 if (method->is_not_osr_compilable(comp_level)) {
1186 return true;
1187 } else {
1188 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1189 return (result != NULL);
1190 }
1191 } else {
1192 if (method->is_not_compilable(comp_level)) {
1193 return true;
1194 } else {
1195 nmethod* result = method->code();
1196 if (result == NULL) return false;
1197 return comp_level == result->comp_level();
1198 }
1199 }
1200 }
1201
1202
1203 /**
1204 * See if this compilation is already requested.
1205 *
1206 * Implementation note: there is only a single "is in queue" bit
1207 * for each method. This means that the check below is overly
1208 * conservative in the sense that an osr compilation in the queue
1209 * will block a normal compilation from entering the queue (and vice
1210 * versa). This can be remedied by a full queue search to disambiguate
1211 * cases. If it is deemed profitable, this may be done.
1212 */
1213 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1214 return method->queued_for_compilation();
1215 }
1216
1217 // ------------------------------------------------------------------
1218 // CompileBroker::compilation_is_prohibited
1219 //
1220 // See if this compilation is not allowed.
1221 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level) {
1222 bool is_native = method->is_native();
1223 // Some compilers may not support the compilation of natives.
1224 AbstractCompiler *comp = compiler(comp_level);
1225 if (is_native &&
1226 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1227 method->set_not_compilable_quietly(comp_level);
1228 return true;
1229 }
1230
1231 bool is_osr = (osr_bci != standard_entry_bci);
1232 // Some compilers may not support on stack replacement.
1233 if (is_osr &&
1234 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1235 method->set_not_osr_compilable(comp_level);
1236 return true;
1237 }
1238
1239 // Breaking the abstraction - directives are only used inside a compilation otherwise.
1240 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1241 bool excluded = directive->ExcludeOption;
1242 DirectivesStack::release(directive);
1243
1244 // The method may be explicitly excluded by the user.
1245 double scale;
1246 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1247 bool quietly = CompilerOracle::should_exclude_quietly();
1248 if (PrintCompilation && !quietly) {
1249 // This does not happen quietly...
1250 ResourceMark rm;
1251 tty->print("### Excluding %s:%s",
1252 method->is_native() ? "generation of native wrapper" : "compile",
1253 (method->is_static() ? " static" : ""));
1254 method->print_short_name(tty);
1255 tty->cr();
1256 }
1257 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1258 return true;
1259 }
1260
1261 return false;
1262 }
1263
1264 /**
1265 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1266 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1267 * The function also allows to generate separate compilation IDs for OSR compilations.
1268 */
1269 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1270 #ifdef ASSERT
1271 bool is_osr = (osr_bci != standard_entry_bci);
1272 int id;
1273 if (method->is_native()) {
1274 assert(!is_osr, "can't be osr");
1275 // Adapters, native wrappers and method handle intrinsics
1276 // should be generated always.
1277 return Atomic::add(1, &_compilation_id);
1278 } else if (CICountOSR && is_osr) {
1279 id = Atomic::add(1, &_osr_compilation_id);
1280 if (CIStartOSR <= id && id < CIStopOSR) {
1281 return id;
1282 }
1283 } else {
1284 id = Atomic::add(1, &_compilation_id);
1285 if (CIStart <= id && id < CIStop) {
1286 return id;
1287 }
1288 }
1289
1290 // Method was not in the appropriate compilation range.
1291 method->set_not_compilable_quietly();
1292 return 0;
1293 #else
1294 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1295 // only _compilation_id is incremented.
1296 return Atomic::add(1, &_compilation_id);
1297 #endif
1298 }
1299
1300 // ------------------------------------------------------------------
1301 // CompileBroker::assign_compile_id_unlocked
1302 //
1303 // Public wrapper for assign_compile_id that acquires the needed locks
1304 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1305 MutexLocker locker(MethodCompileQueue_lock, thread);
1306 return assign_compile_id(method, osr_bci);
1307 }
1308
1309 /**
1310 * Should the current thread block until this compilation request
1311 * has been fulfilled?
1312 */
1313 bool CompileBroker::is_compile_blocking() {
1314 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1315 return !BackgroundCompilation;
1316 }
1317
1318
1319 // ------------------------------------------------------------------
1320 // CompileBroker::preload_classes
1321 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1322 // Move this code over from c1_Compiler.cpp
1323 ShouldNotReachHere();
1324 }
1325
1326
1327 // ------------------------------------------------------------------
1328 // CompileBroker::create_compile_task
1329 //
1330 // Create a CompileTask object representing the current request for
1331 // compilation. Add this task to the queue.
1332 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1333 int compile_id,
1334 const methodHandle& method,
1335 int osr_bci,
1336 int comp_level,
1337 const methodHandle& hot_method,
1338 int hot_count,
1339 const char* comment,
1340 bool blocking) {
1341 CompileTask* new_task = CompileTask::allocate();
1342 new_task->initialize(compile_id, method, osr_bci, comp_level,
1343 hot_method, hot_count, comment,
1344 blocking);
1345 queue->add(new_task);
1346 return new_task;
1347 }
1348
1349 #if INCLUDE_JVMCI
1350 // The number of milliseconds to wait before checking if
1351 // JVMCI compilation has made progress.
1352 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1353
1354 // The number of JVMCI compilation progress checks that must fail
1355 // before unblocking a thread waiting for a blocking compilation.
1356 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1357
1358 /**
1359 * Waits for a JVMCI compiler to complete a given task. This thread
1360 * waits until either the task completes or it sees no JVMCI compilation
1361 * progress for N consecutive milliseconds where N is
1362 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1363 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1364 *
1365 * @return true if this thread needs to free/recycle the task
1366 */
1367 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1368 MutexLocker waiter(task->lock(), thread);
1369 int progress_wait_attempts = 0;
1370 int methods_compiled = jvmci->methods_compiled();
1371 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1372 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1373 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1374
1375 bool progress;
1376 if (jvmci_compiler_thread != NULL) {
1377 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1378 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1379 } else {
1380 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1381 // that all JVMCI compiler threads are blocked on. We use the counter for
1382 // successful JVMCI compilations to determine whether JVMCI compilation
1383 // is still making progress through the JVMCI compiler queue.
1384 progress = jvmci->methods_compiled() != methods_compiled;
1385 }
1386
1387 if (!progress) {
1388 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1389 if (PrintCompilation) {
1390 task->print(tty, "wait for blocking compilation timed out");
1391 }
1392 break;
1393 }
1394 } else {
1395 progress_wait_attempts = 0;
1396 if (jvmci_compiler_thread == NULL) {
1397 methods_compiled = jvmci->methods_compiled();
1398 }
1399 }
1400 }
1401 task->clear_waiter();
1402 return task->is_complete();
1403 }
1404 #endif
1405
1406 /**
1407 * Wait for the compilation task to complete.
1408 */
1409 void CompileBroker::wait_for_completion(CompileTask* task) {
1410 if (CIPrintCompileQueue) {
1411 ttyLocker ttyl;
1412 tty->print_cr("BLOCKING FOR COMPILE");
1413 }
1414
1415 assert(task->is_blocking(), "can only wait on blocking task");
1416
1417 JavaThread* thread = JavaThread::current();
1418 thread->set_blocked_on_compilation(true);
1419
1420 methodHandle method(thread, task->method());
1421 bool free_task;
1422 #if INCLUDE_JVMCI
1423 AbstractCompiler* comp = compiler(task->comp_level());
1424 if (comp->is_jvmci()) {
1425 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1426 } else
1427 #endif
1428 {
1429 MutexLocker waiter(task->lock(), thread);
1430 free_task = true;
1431 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1432 task->lock()->wait();
1433 }
1434 }
1435
1436 thread->set_blocked_on_compilation(false);
1437 if (free_task) {
1438 if (is_compilation_disabled_forever()) {
1439 CompileTask::free(task);
1440 return;
1441 }
1442
1443 // It is harmless to check this status without the lock, because
1444 // completion is a stable property (until the task object is recycled).
1445 assert(task->is_complete(), "Compilation should have completed");
1446 assert(task->code_handle() == NULL, "must be reset");
1447
1448 // By convention, the waiter is responsible for recycling a
1449 // blocking CompileTask. Since there is only one waiter ever
1450 // waiting on a CompileTask, we know that no one else will
1451 // be using this CompileTask; we can free it.
1452 CompileTask::free(task);
1453 }
1454 }
1455
1456 /**
1457 * Initialize compiler thread(s) + compiler object(s). The postcondition
1458 * of this function is that the compiler runtimes are initialized and that
1459 * compiler threads can start compiling.
1460 */
1461 bool CompileBroker::init_compiler_runtime() {
1462 CompilerThread* thread = CompilerThread::current();
1463 AbstractCompiler* comp = thread->compiler();
1464 // Final sanity check - the compiler object must exist
1465 guarantee(comp != NULL, "Compiler object must exist");
1466
1467 int system_dictionary_modification_counter;
1468 {
1469 MutexLocker locker(Compile_lock, thread);
1470 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1471 }
1472
1473 {
1474 // Must switch to native to allocate ci_env
1475 ThreadToNativeFromVM ttn(thread);
1476 // Matching the default directive, we currently have no method to match.
1477 DirectiveSet* directive = DirectivesStack::getDefaultDirective(CompileBroker::compiler(CompLevel_full_optimization));
1478 ciEnv ci_env(NULL, system_dictionary_modification_counter, directive);
1479 // Cache Jvmti state
1480 ci_env.cache_jvmti_state();
1481 // Cache DTrace flags
1482 ci_env.cache_dtrace_flags();
1483
1484 // Switch back to VM state to do compiler initialization
1485 ThreadInVMfromNative tv(thread);
1486 ResetNoHandleMark rnhm;
1487
1488 if (!comp->is_shark()) {
1489 // Perform per-thread and global initializations
1490 comp->initialize();
1491 }
1492 DirectivesStack::release(directive);
1493 }
1494
1495 if (comp->is_failed()) {
1496 disable_compilation_forever();
1497 // If compiler initialization failed, no compiler thread that is specific to a
1498 // particular compiler runtime will ever start to compile methods.
1499 shutdown_compiler_runtime(comp, thread);
1500 return false;
1501 }
1502
1503 // C1 specific check
1504 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1505 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1506 return false;
1507 }
1508
1509 return true;
1510 }
1511
1512 /**
1513 * If C1 and/or C2 initialization failed, we shut down all compilation.
1514 * We do this to keep things simple. This can be changed if it ever turns
1515 * out to be a problem.
1516 */
1517 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1518 // Free buffer blob, if allocated
1519 if (thread->get_buffer_blob() != NULL) {
1520 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1521 CodeCache::free(thread->get_buffer_blob());
1522 }
1523
1524 if (comp->should_perform_shutdown()) {
1525 // There are two reasons for shutting down the compiler
1526 // 1) compiler runtime initialization failed
1527 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1528 warning("%s initialization failed. Shutting down all compilers", comp->name());
1529
1530 // Only one thread per compiler runtime object enters here
1531 // Set state to shut down
1532 comp->set_shut_down();
1533
1534 // Delete all queued compilation tasks to make compiler threads exit faster.
1535 if (_c1_compile_queue != NULL) {
1536 _c1_compile_queue->free_all();
1537 }
1538
1539 if (_c2_compile_queue != NULL) {
1540 _c2_compile_queue->free_all();
1541 }
1542
1543 // Set flags so that we continue execution with using interpreter only.
1544 UseCompiler = false;
1545 UseInterpreter = true;
1546
1547 // We could delete compiler runtimes also. However, there are references to
1548 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1549 // fail. This can be done later if necessary.
1550 }
1551 }
1552
1553 // ------------------------------------------------------------------
1554 // CompileBroker::compiler_thread_loop
1555 //
1556 // The main loop run by a CompilerThread.
1557 void CompileBroker::compiler_thread_loop() {
1558 CompilerThread* thread = CompilerThread::current();
1559 CompileQueue* queue = thread->queue();
1560 // For the thread that initializes the ciObjectFactory
1561 // this resource mark holds all the shared objects
1562 ResourceMark rm;
1563
1564 // First thread to get here will initialize the compiler interface
1565
1566 if (!ciObjectFactory::is_initialized()) {
1567 ASSERT_IN_VM;
1568 MutexLocker only_one (CompileThread_lock, thread);
1569 if (!ciObjectFactory::is_initialized()) {
1570 ciObjectFactory::initialize();
1571 }
1572 }
1573
1574 // Open a log.
1575 if (LogCompilation) {
1576 init_compiler_thread_log();
1577 }
1578 CompileLog* log = thread->log();
1579 if (log != NULL) {
1580 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1581 thread->name(),
1582 os::current_thread_id(),
1583 os::current_process_id());
1584 log->stamp();
1585 log->end_elem();
1586 }
1587
1588 // If compiler thread/runtime initialization fails, exit the compiler thread
1589 if (!init_compiler_runtime()) {
1590 return;
1591 }
1592
1593 // Poll for new compilation tasks as long as the JVM runs. Compilation
1594 // should only be disabled if something went wrong while initializing the
1595 // compiler runtimes. This, in turn, should not happen. The only known case
1596 // when compiler runtime initialization fails is if there is not enough free
1597 // space in the code cache to generate the necessary stubs, etc.
1598 while (!is_compilation_disabled_forever()) {
1599 // We need this HandleMark to avoid leaking VM handles.
1600 HandleMark hm(thread);
1601
1602 CompileTask* task = queue->get();
1603 if (task == NULL) {
1604 continue;
1605 }
1606
1607 // Give compiler threads an extra quanta. They tend to be bursty and
1608 // this helps the compiler to finish up the job.
1609 if (CompilerThreadHintNoPreempt) {
1610 os::hint_no_preempt();
1611 }
1612
1613 // Assign the task to the current thread. Mark this compilation
1614 // thread as active for the profiler.
1615 CompileTaskWrapper ctw(task);
1616 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1617 task->set_code_handle(&result_handle);
1618 methodHandle method(thread, task->method());
1619
1620 // Never compile a method if breakpoints are present in it
1621 if (method()->number_of_breakpoints() == 0) {
1622 // Compile the method.
1623 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1624 invoke_compiler_on_method(task);
1625 } else {
1626 // After compilation is disabled, remove remaining methods from queue
1627 method->clear_queued_for_compilation();
1628 task->set_failure_reason("compilation is disabled");
1629 }
1630 }
1631 }
1632
1633 // Shut down compiler runtime
1634 shutdown_compiler_runtime(thread->compiler(), thread);
1635 }
1636
1637 // ------------------------------------------------------------------
1638 // CompileBroker::init_compiler_thread_log
1639 //
1640 // Set up state required by +LogCompilation.
1641 void CompileBroker::init_compiler_thread_log() {
1642 CompilerThread* thread = CompilerThread::current();
1643 char file_name[4*K];
1644 FILE* fp = NULL;
1645 intx thread_id = os::current_thread_id();
1646 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1647 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1648 if (dir == NULL) {
1649 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1650 thread_id, os::current_process_id());
1651 } else {
1652 jio_snprintf(file_name, sizeof(file_name),
1653 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1654 os::file_separator(), thread_id, os::current_process_id());
1655 }
1656
1657 fp = fopen(file_name, "wt");
1658 if (fp != NULL) {
1659 if (LogCompilation && Verbose) {
1660 tty->print_cr("Opening compilation log %s", file_name);
1661 }
1662 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1663 thread->init_log(log);
1664
1665 if (xtty != NULL) {
1666 ttyLocker ttyl;
1667 // Record any per thread log files
1668 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1669 }
1670 return;
1671 }
1672 }
1673 warning("Cannot open log file: %s", file_name);
1674 }
1675
1676 void CompileBroker::log_metaspace_failure() {
1677 const char* message = "some methods may not be compiled because metaspace "
1678 "is out of memory";
1679 if (_compilation_log != NULL) {
1680 _compilation_log->log_metaspace_failure(message);
1681 }
1682 if (PrintCompilation) {
1683 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1684 }
1685 }
1686
1687
1688 // ------------------------------------------------------------------
1689 // CompileBroker::set_should_block
1690 //
1691 // Set _should_block.
1692 // Call this from the VM, with Threads_lock held and a safepoint requested.
1693 void CompileBroker::set_should_block() {
1694 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1695 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1696 #ifndef PRODUCT
1697 if (PrintCompilation && (Verbose || WizardMode))
1698 tty->print_cr("notifying compiler thread pool to block");
1699 #endif
1700 _should_block = true;
1701 }
1702
1703 // ------------------------------------------------------------------
1704 // CompileBroker::maybe_block
1705 //
1706 // Call this from the compiler at convenient points, to poll for _should_block.
1707 void CompileBroker::maybe_block() {
1708 if (_should_block) {
1709 #ifndef PRODUCT
1710 if (PrintCompilation && (Verbose || WizardMode))
1711 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1712 #endif
1713 ThreadInVMfromNative tivfn(JavaThread::current());
1714 }
1715 }
1716
1717 // wrapper for CodeCache::print_summary()
1718 static void codecache_print(bool detailed)
1719 {
1720 ResourceMark rm;
1721 stringStream s;
1722 // Dump code cache into a buffer before locking the tty,
1723 {
1724 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1725 CodeCache::print_summary(&s, detailed);
1726 }
1727 ttyLocker ttyl;
1728 tty->print("%s", s.as_string());
1729 }
1730
1731 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1732
1733 if (success) {
1734 task->mark_success();
1735 if (ci_env != NULL) {
1736 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1737 }
1738 if (_compilation_log != NULL) {
1739 nmethod* code = task->code();
1740 if (code != NULL) {
1741 _compilation_log->log_nmethod(thread, code);
1742 }
1743 }
1744 }
1745
1746 // simulate crash during compilation
1747 assert(task->compile_id() != CICrashAt, "just as planned");
1748 if (event.should_commit()) {
1749 event.set_method(task->method());
1750 event.set_compileID(task->compile_id());
1751 event.set_compileLevel(task->comp_level());
1752 event.set_succeded(task->is_success());
1753 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1754 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1755 event.set_inlinedBytes(task->num_inlined_bytecodes());
1756 event.commit();
1757 }
1758 }
1759
1760 int DirectivesStack::_depth = 0;
1761 CompilerDirectives* DirectivesStack::_top = NULL;
1762 CompilerDirectives* DirectivesStack::_bottom = NULL;
1763
1764 // ------------------------------------------------------------------
1765 // CompileBroker::invoke_compiler_on_method
1766 //
1767 // Compile a method.
1768 //
1769 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1770 if (PrintCompilation) {
1771 ResourceMark rm;
1772 task->print_tty();
1773 }
1774 elapsedTimer time;
1775
1776 CompilerThread* thread = CompilerThread::current();
1777 ResourceMark rm(thread);
1778
1779 if (LogEvents) {
1780 _compilation_log->log_compile(thread, task);
1781 }
1782
1783 // Common flags.
1784 uint compile_id = task->compile_id();
1785 int osr_bci = task->osr_bci();
1786 bool is_osr = (osr_bci != standard_entry_bci);
1787 bool should_log = (thread->log() != NULL);
1788 bool should_break = false;
1789 int task_level = task->comp_level();
1790
1791 DirectiveSet* directive;
1792 {
1793 // create the handle inside it's own block so it can't
1794 // accidentally be referenced once the thread transitions to
1795 // native. The NoHandleMark before the transition should catch
1796 // any cases where this occurs in the future.
1797 methodHandle method(thread, task->method());
1798 assert(!method->is_native(), "no longer compile natives");
1799
1800 // Look up matching directives
1801 directive = DirectivesStack::getMatchingDirective(method, compiler(task_level));
1802
1803 // Save information about this method in case of failure.
1804 set_last_compile(thread, method, is_osr, task_level);
1805
1806 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1807 }
1808
1809 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1810 if (should_log && !directive->LogOption) {
1811 should_log = false;
1812 }
1813
1814 // Allocate a new set of JNI handles.
1815 push_jni_handle_block();
1816 Method* target_handle = task->method();
1817 int compilable = ciEnv::MethodCompilable;
1818 const char* failure_reason = NULL;
1819 const char* retry_message = NULL;
1820 AbstractCompiler *comp = compiler(task_level);
1821
1822 int system_dictionary_modification_counter;
1823 {
1824 MutexLocker locker(Compile_lock, thread);
1825 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1826 }
1827 #if INCLUDE_JVMCI
1828 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1829 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1830
1831 TraceTime t1("compilation", &time);
1832 EventCompilation event;
1833
1834 JVMCIEnv env(task, system_dictionary_modification_counter);
1835 methodHandle method(thread, target_handle);
1836 jvmci->compile_method(method, osr_bci, &env);
1837
1838 post_compile(thread, task, event, task->code() != NULL, NULL);
1839
1840 failure_reason = env.failure_reason();
1841 if (!env.retryable()) {
1842 retry_message = "not retryable";
1843 compilable = ciEnv::MethodCompilable_not_at_tier;
1844 }
1845
1846 } else
1847 #endif // INCLUDE_JVMCI
1848 {
1849 NoHandleMark nhm;
1850 ThreadToNativeFromVM ttn(thread);
1851
1852 ciEnv ci_env(task, system_dictionary_modification_counter, directive);
1853 if (should_break) {
1854 ci_env.set_break_at_compile(true);
1855 }
1856 if (should_log) {
1857 ci_env.set_log(thread->log());
1858 }
1859 assert(thread->env() == &ci_env, "set by ci_env");
1860 // The thread-env() field is cleared in ~CompileTaskWrapper.
1861
1862 // Cache Jvmti state
1863 ci_env.cache_jvmti_state();
1864
1865 // Cache DTrace flags
1866 ci_env.cache_dtrace_flags();
1867
1868 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1869
1870 TraceTime t1("compilation", &time);
1871 EventCompilation event;
1872
1873 if (comp == NULL) {
1874 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1875 } else {
1876 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1877 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1878 while (WhiteBox::compilation_locked) {
1879 locker.wait(Mutex::_no_safepoint_check_flag);
1880 }
1881 }
1882 comp->compile_method(&ci_env, target, osr_bci);
1883 }
1884
1885 if (!ci_env.failing() && task->code() == NULL) {
1886 //assert(false, "compiler should always document failure");
1887 // The compiler elected, without comment, not to register a result.
1888 // Do not attempt further compilations of this method.
1889 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1890 }
1891
1892 // Copy this bit to the enclosing block:
1893 compilable = ci_env.compilable();
1894
1895 if (ci_env.failing()) {
1896 failure_reason = ci_env.failure_reason();
1897 retry_message = ci_env.retry_message();
1898 ci_env.report_failure(failure_reason);
1899 }
1900
1901 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1902 }
1903 // Remove the JNI handle block after the ciEnv destructor has run in
1904 // the previous block.
1905 pop_jni_handle_block();
1906
1907 if (failure_reason != NULL) {
1908 task->set_failure_reason(failure_reason);
1909 if (_compilation_log != NULL) {
1910 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1911 }
1912 if (PrintCompilation) {
1913 FormatBufferResource msg = retry_message != NULL ?
1914 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1915 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1916 task->print(tty, msg);
1917 }
1918 }
1919
1920 methodHandle method(thread, task->method());
1921
1922 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1923
1924 collect_statistics(thread, time, task);
1925
1926 bool printnmethods = directive->PrintAssemblyOption || directive->PrintNMethodsOption;
1927 if (printnmethods || PrintDebugInfo || PrintRelocations || PrintDependencies || PrintExceptionHandlers) {
1928 nmethod* nm = task->code();
1929 if (nm != NULL) {
1930 nm->print_nmethod(printnmethods);
1931 }
1932 }
1933 DirectivesStack::release(directive);
1934
1935 if (PrintCompilation && PrintCompilation2) {
1936 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1937 tty->print("%4d ", compile_id); // print compilation number
1938 tty->print("%s ", (is_osr ? "%" : " "));
1939 if (task->code() != NULL) {
1940 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1941 }
1942 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1943 }
1944
1945 if (PrintCodeCacheOnCompilation)
1946 codecache_print(/* detailed= */ false);
1947
1948 // Disable compilation, if required.
1949 switch (compilable) {
1950 case ciEnv::MethodCompilable_never:
1951 if (is_osr)
1952 method->set_not_osr_compilable_quietly();
1953 else
1954 method->set_not_compilable_quietly();
1955 break;
1956 case ciEnv::MethodCompilable_not_at_tier:
1957 if (is_osr)
1958 method->set_not_osr_compilable_quietly(task_level);
1959 else
1960 method->set_not_compilable_quietly(task_level);
1961 break;
1962 }
1963
1964 // Note that the queued_for_compilation bits are cleared without
1965 // protection of a mutex. [They were set by the requester thread,
1966 // when adding the task to the compile queue -- at which time the
1967 // compile queue lock was held. Subsequently, we acquired the compile
1968 // queue lock to get this task off the compile queue; thus (to belabour
1969 // the point somewhat) our clearing of the bits must be occurring
1970 // only after the setting of the bits. See also 14012000 above.
1971 method->clear_queued_for_compilation();
1972
1973 #ifdef ASSERT
1974 if (CollectedHeap::fired_fake_oom()) {
1975 // The current compile received a fake OOM during compilation so
1976 // go ahead and exit the VM since the test apparently succeeded
1977 tty->print_cr("*** Shutting down VM after successful fake OOM");
1978 vm_exit(0);
1979 }
1980 #endif
1981 }
1982
1983 /**
1984 * The CodeCache is full. Print warning and disable compilation.
1985 * Schedule code cache cleaning so compilation can continue later.
1986 * This function needs to be called only from CodeCache::allocate(),
1987 * since we currently handle a full code cache uniformly.
1988 */
1989 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1990 UseInterpreter = true;
1991 if (UseCompiler || AlwaysCompileLoopMethods ) {
1992 if (xtty != NULL) {
1993 ResourceMark rm;
1994 stringStream s;
1995 // Dump code cache state into a buffer before locking the tty,
1996 // because log_state() will use locks causing lock conflicts.
1997 CodeCache::log_state(&s);
1998 // Lock to prevent tearing
1999 ttyLocker ttyl;
2000 xtty->begin_elem("code_cache_full");
2001 xtty->print("%s", s.as_string());
2002 xtty->stamp();
2003 xtty->end_elem();
2004 }
2005
2006 #ifndef PRODUCT
2007 if (CompileTheWorld || ExitOnFullCodeCache) {
2008 codecache_print(/* detailed= */ true);
2009 before_exit(JavaThread::current());
2010 exit_globals(); // will delete tty
2011 vm_direct_exit(CompileTheWorld ? 0 : 1);
2012 }
2013 #endif
2014 if (UseCodeCacheFlushing) {
2015 // Since code cache is full, immediately stop new compiles
2016 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2017 NMethodSweeper::log_sweep("disable_compiler");
2018 }
2019 } else {
2020 disable_compilation_forever();
2021 }
2022
2023 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2024 }
2025 }
2026
2027 // ------------------------------------------------------------------
2028 // CompileBroker::set_last_compile
2029 //
2030 // Record this compilation for debugging purposes.
2031 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2032 ResourceMark rm;
2033 char* method_name = method->name()->as_C_string();
2034 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2035 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2036 char current_method[CompilerCounters::cmname_buffer_length];
2037 size_t maxLen = CompilerCounters::cmname_buffer_length;
2038
2039 if (UsePerfData) {
2040 const char* class_name = method->method_holder()->name()->as_C_string();
2041
2042 size_t s1len = strlen(class_name);
2043 size_t s2len = strlen(method_name);
2044
2045 // check if we need to truncate the string
2046 if (s1len + s2len + 2 > maxLen) {
2047
2048 // the strategy is to lop off the leading characters of the
2049 // class name and the trailing characters of the method name.
2050
2051 if (s2len + 2 > maxLen) {
2052 // lop of the entire class name string, let snprintf handle
2053 // truncation of the method name.
2054 class_name += s1len; // null string
2055 }
2056 else {
2057 // lop off the extra characters from the front of the class name
2058 class_name += ((s1len + s2len + 2) - maxLen);
2059 }
2060 }
2061
2062 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2063 }
2064
2065 if (CICountOSR && is_osr) {
2066 _last_compile_type = osr_compile;
2067 } else {
2068 _last_compile_type = normal_compile;
2069 }
2070 _last_compile_level = comp_level;
2071
2072 if (UsePerfData) {
2073 CompilerCounters* counters = thread->counters();
2074 counters->set_current_method(current_method);
2075 counters->set_compile_type((jlong)_last_compile_type);
2076 }
2077 }
2078
2079
2080 // ------------------------------------------------------------------
2081 // CompileBroker::push_jni_handle_block
2082 //
2083 // Push on a new block of JNI handles.
2084 void CompileBroker::push_jni_handle_block() {
2085 JavaThread* thread = JavaThread::current();
2086
2087 // Allocate a new block for JNI handles.
2088 // Inlined code from jni_PushLocalFrame()
2089 JNIHandleBlock* java_handles = thread->active_handles();
2090 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2091 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2092 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2093 thread->set_active_handles(compile_handles);
2094 }
2095
2096
2097 // ------------------------------------------------------------------
2098 // CompileBroker::pop_jni_handle_block
2099 //
2100 // Pop off the current block of JNI handles.
2101 void CompileBroker::pop_jni_handle_block() {
2102 JavaThread* thread = JavaThread::current();
2103
2104 // Release our JNI handle block
2105 JNIHandleBlock* compile_handles = thread->active_handles();
2106 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2107 thread->set_active_handles(java_handles);
2108 compile_handles->set_pop_frame_link(NULL);
2109 JNIHandleBlock::release_block(compile_handles, thread); // may block
2110 }
2111
2112 // ------------------------------------------------------------------
2113 // CompileBroker::collect_statistics
2114 //
2115 // Collect statistics about the compilation.
2116
2117 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2118 bool success = task->is_success();
2119 methodHandle method (thread, task->method());
2120 uint compile_id = task->compile_id();
2121 bool is_osr = (task->osr_bci() != standard_entry_bci);
2122 nmethod* code = task->code();
2123 CompilerCounters* counters = thread->counters();
2124
2125 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2126 MutexLocker locker(CompileStatistics_lock);
2127
2128 // _perf variables are production performance counters which are
2129 // updated regardless of the setting of the CITime and CITimeEach flags
2130 //
2131
2132 // account all time, including bailouts and failures in this counter;
2133 // C1 and C2 counters are counting both successful and unsuccessful compiles
2134 _t_total_compilation.add(time);
2135
2136 if (!success) {
2137 _total_bailout_count++;
2138 if (UsePerfData) {
2139 _perf_last_failed_method->set_value(counters->current_method());
2140 _perf_last_failed_type->set_value(counters->compile_type());
2141 _perf_total_bailout_count->inc();
2142 }
2143 _t_bailedout_compilation.add(time);
2144 } else if (code == NULL) {
2145 if (UsePerfData) {
2146 _perf_last_invalidated_method->set_value(counters->current_method());
2147 _perf_last_invalidated_type->set_value(counters->compile_type());
2148 _perf_total_invalidated_count->inc();
2149 }
2150 _total_invalidated_count++;
2151 _t_invalidated_compilation.add(time);
2152 } else {
2153 // Compilation succeeded
2154
2155 // update compilation ticks - used by the implementation of
2156 // java.lang.management.CompilationMBean
2157 _perf_total_compilation->inc(time.ticks());
2158 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2159
2160 if (CITime) {
2161 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2162 JVMCI_ONLY(CompilerStatistics* stats = compiler(task->comp_level())->stats();)
2163 if (is_osr) {
2164 _t_osr_compilation.add(time);
2165 _sum_osr_bytes_compiled += bytes_compiled;
2166 JVMCI_ONLY(stats->_osr.update(time, bytes_compiled);)
2167 } else {
2168 _t_standard_compilation.add(time);
2169 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2170 JVMCI_ONLY(stats->_standard.update(time, bytes_compiled);)
2171 }
2172 JVMCI_ONLY(stats->_nmethods_size += code->total_size();)
2173 JVMCI_ONLY(stats->_nmethods_code_size += code->insts_size();)
2174 }
2175
2176 if (UsePerfData) {
2177 // save the name of the last method compiled
2178 _perf_last_method->set_value(counters->current_method());
2179 _perf_last_compile_type->set_value(counters->compile_type());
2180 _perf_last_compile_size->set_value(method->code_size() +
2181 task->num_inlined_bytecodes());
2182 if (is_osr) {
2183 _perf_osr_compilation->inc(time.ticks());
2184 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2185 } else {
2186 _perf_standard_compilation->inc(time.ticks());
2187 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2188 }
2189 }
2190
2191 if (CITimeEach) {
2192 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2193 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2194 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2195 }
2196
2197 // Collect counts of successful compilations
2198 _sum_nmethod_size += code->total_size();
2199 _sum_nmethod_code_size += code->insts_size();
2200 _total_compile_count++;
2201
2202 if (UsePerfData) {
2203 _perf_sum_nmethod_size->inc( code->total_size());
2204 _perf_sum_nmethod_code_size->inc(code->insts_size());
2205 _perf_total_compile_count->inc();
2206 }
2207
2208 if (is_osr) {
2209 if (UsePerfData) _perf_total_osr_compile_count->inc();
2210 _total_osr_compile_count++;
2211 } else {
2212 if (UsePerfData) _perf_total_standard_compile_count->inc();
2213 _total_standard_compile_count++;
2214 }
2215 }
2216 // set the current method for the thread to null
2217 if (UsePerfData) counters->set_current_method("");
2218 }
2219
2220 const char* CompileBroker::compiler_name(int comp_level) {
2221 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2222 if (comp == NULL) {
2223 return "no compiler";
2224 } else {
2225 return (comp->name());
2226 }
2227 }
2228
2229 #if INCLUDE_JVMCI
2230 void CompileBroker::print_times(AbstractCompiler* comp) {
2231 CompilerStatistics* stats = comp->stats();
2232 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}",
2233 comp->name(), stats->bytes_per_second(),
2234 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2235 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2236 stats->_nmethods_size, stats->_nmethods_code_size);
2237 comp->print_timers();
2238 }
2239 #endif // INCLUDE_JVMCI
2240
2241 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2242 #if INCLUDE_JVMCI
2243 elapsedTimer standard_compilation;
2244 elapsedTimer total_compilation;
2245 elapsedTimer osr_compilation;
2246
2247 int standard_bytes_compiled = 0;
2248 int osr_bytes_compiled = 0;
2249
2250 int standard_compile_count = 0;
2251 int osr_compile_count = 0;
2252 int total_compile_count = 0;
2253
2254 int nmethods_size = 0;
2255 int nmethods_code_size = 0;
2256 bool printedHeader = false;
2257
2258 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2259 AbstractCompiler* comp = _compilers[i];
2260 if (comp != NULL) {
2261 if (per_compiler && aggregate && !printedHeader) {
2262 printedHeader = true;
2263 tty->cr();
2264 tty->print_cr("Individual compiler times (for compiled methods only)");
2265 tty->print_cr("------------------------------------------------");
2266 tty->cr();
2267 }
2268 CompilerStatistics* stats = comp->stats();
2269
2270 standard_compilation.add(stats->_standard._time);
2271 osr_compilation.add(stats->_osr._time);
2272
2273 standard_bytes_compiled += stats->_standard._bytes;
2274 osr_bytes_compiled += stats->_osr._bytes;
2275
2276 standard_compile_count += stats->_standard._count;
2277 osr_compile_count += stats->_osr._count;
2278
2279 nmethods_size += stats->_nmethods_size;
2280 nmethods_code_size += stats->_nmethods_code_size;
2281
2282 if (per_compiler) {
2283 print_times(comp);
2284 }
2285 }
2286 }
2287 total_compile_count = osr_compile_count + standard_compile_count;
2288 total_compilation.add(osr_compilation);
2289 total_compilation.add(standard_compilation);
2290
2291 // In hosted mode, print the JVMCI compiler specific counters manually.
2292 if (!UseJVMCICompiler) {
2293 JVMCICompiler::print_compilation_timers();
2294 }
2295 #else // INCLUDE_JVMCI
2296 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2297 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2298 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2299
2300 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2301 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2302
2303 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2304 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2305 int total_compile_count = CompileBroker::_total_compile_count;
2306
2307 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2308 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2309 #endif // INCLUDE_JVMCI
2310
2311 if (!aggregate) {
2312 return;
2313 }
2314 tty->cr();
2315 tty->print_cr("Accumulated compiler times");
2316 tty->print_cr("----------------------------------------------------------");
2317 //0000000000111111111122222222223333333333444444444455555555556666666666
2318 //0123456789012345678901234567890123456789012345678901234567890123456789
2319 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2320 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2321 standard_compilation.seconds(),
2322 standard_compilation.seconds() / standard_compile_count);
2323 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2324 CompileBroker::_t_bailedout_compilation.seconds(),
2325 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2326 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2327 osr_compilation.seconds(),
2328 osr_compilation.seconds() / osr_compile_count);
2329 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2330 CompileBroker::_t_invalidated_compilation.seconds(),
2331 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2332
2333 AbstractCompiler *comp = compiler(CompLevel_simple);
2334 if (comp != NULL) {
2335 tty->cr();
2336 comp->print_timers();
2337 }
2338 comp = compiler(CompLevel_full_optimization);
2339 if (comp != NULL) {
2340 tty->cr();
2341 comp->print_timers();
2342 }
2343 tty->cr();
2344 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2345 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2346 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2347 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2348 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2349 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2350 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2351 double tcs = total_compilation.seconds();
2352 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2353 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2354 tty->cr();
2355 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2356 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2357 }
2358
2359 // Debugging output for failure
2360 void CompileBroker::print_last_compile() {
2361 if ( _last_compile_level != CompLevel_none &&
2362 compiler(_last_compile_level) != NULL &&
2363 _last_method_compiled != NULL &&
2364 _last_compile_type != no_compile) {
2365 if (_last_compile_type == osr_compile) {
2366 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2367 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2368 } else {
2369 tty->print_cr("Last parse: %d+++(%d) %s",
2370 _compilation_id, _last_compile_level, _last_method_compiled);
2371 }
2372 }
2373 }
2374