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