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
473 char buf[2000];
474 int buflen = sizeof(buf);
475 Threads::print_threads_compiling(st, buf, buflen);
476
477 st->cr();
478 if (_c1_compile_queue != NULL) {
479 _c1_compile_queue->print(st);
480 }
481 if (_c2_compile_queue != NULL) {
482 _c2_compile_queue->print(st);
483 }
484 }
485
486 void CompileQueue::print(outputStream* st) {
487 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
488 st->print_cr("%s:", name());
489 CompileTask* task = _first;
490 if (task == NULL) {
491 st->print_cr("Empty");
492 } else {
493 while (task != NULL) {
494 task->print(st, NULL, true, true);
495 task = task->next();
496 }
497 }
498 st->cr();
499 }
500
501 void CompileQueue::print_tty() {
502 ttyLocker ttyl;
503 print(tty);
504 }
505
506 CompilerCounters::CompilerCounters() {
507 _current_method[0] = '\0';
508 _compile_type = CompileBroker::no_compile;
509 }
510
511 // ------------------------------------------------------------------
512 // CompileBroker::compilation_init
513 //
514 // Initialize the Compilation object
515 void CompileBroker::compilation_init(TRAPS) {
516 _last_method_compiled[0] = '\0';
517
518 // No need to initialize compilation system if we do not use it.
519 if (!UseCompiler) {
520 return;
521 }
522 #ifndef SHARK
523 // Set the interface to the current compiler(s).
524 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
525 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
526
527 #if INCLUDE_JVMCI
528 if (EnableJVMCI) {
529 // This is creating a JVMCICompiler singleton.
530 JVMCICompiler* jvmci = new JVMCICompiler();
531
532 if (UseJVMCICompiler) {
533 _compilers[1] = jvmci;
534 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
535 if (BootstrapJVMCI) {
536 // JVMCI will bootstrap so give it more threads
537 c2_count = MIN2(32, os::active_processor_count());
538 }
539 } else {
540 c2_count = JVMCIThreads;
541 }
542 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
543 } else {
544 c1_count = JVMCIHostThreads;
545 }
546
547 if (!UseInterpreter || !BackgroundCompilation) {
548 // Force initialization of JVMCI compiler otherwise JVMCI
549 // compilations will not block until JVMCI is initialized
550 ResourceMark rm;
551 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK);
552 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK);
553 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK);
554 JavaValue result(T_OBJECT);
555 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK);
556 }
557 }
558 }
559 #endif // INCLUDE_JVMCI
560
561 #ifdef COMPILER1
562 if (c1_count > 0) {
563 _compilers[0] = new Compiler();
564 }
565 #endif // COMPILER1
566
567 #ifdef COMPILER2
568 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
569 if (c2_count > 0) {
570 _compilers[1] = new C2Compiler();
571 }
572 }
573 #endif // COMPILER2
574
575 #else // SHARK
576 int c1_count = 0;
577 int c2_count = 1;
578
579 _compilers[1] = new SharkCompiler();
580 #endif // SHARK
581
582 // Start the compiler thread(s) and the sweeper thread
583 init_compiler_sweeper_threads(c1_count, c2_count);
584 // totalTime performance counter is always created as it is required
585 // by the implementation of java.lang.management.CompilationMBean.
586 {
587 EXCEPTION_MARK;
588 _perf_total_compilation =
589 PerfDataManager::create_counter(JAVA_CI, "totalTime",
590 PerfData::U_Ticks, CHECK);
591 }
592
593 if (UsePerfData) {
594
595 EXCEPTION_MARK;
596
597 // create the jvmstat performance counters
598 _perf_osr_compilation =
599 PerfDataManager::create_counter(SUN_CI, "osrTime",
600 PerfData::U_Ticks, CHECK);
601
602 _perf_standard_compilation =
603 PerfDataManager::create_counter(SUN_CI, "standardTime",
604 PerfData::U_Ticks, CHECK);
605
606 _perf_total_bailout_count =
607 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
608 PerfData::U_Events, CHECK);
609
610 _perf_total_invalidated_count =
611 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
612 PerfData::U_Events, CHECK);
613
614 _perf_total_compile_count =
615 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
616 PerfData::U_Events, CHECK);
617 _perf_total_osr_compile_count =
618 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
619 PerfData::U_Events, CHECK);
620
621 _perf_total_standard_compile_count =
622 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
623 PerfData::U_Events, CHECK);
624
625 _perf_sum_osr_bytes_compiled =
626 PerfDataManager::create_counter(SUN_CI, "osrBytes",
627 PerfData::U_Bytes, CHECK);
628
629 _perf_sum_standard_bytes_compiled =
630 PerfDataManager::create_counter(SUN_CI, "standardBytes",
631 PerfData::U_Bytes, CHECK);
632
633 _perf_sum_nmethod_size =
634 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
635 PerfData::U_Bytes, CHECK);
636
637 _perf_sum_nmethod_code_size =
638 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
639 PerfData::U_Bytes, CHECK);
640
641 _perf_last_method =
642 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
643 CompilerCounters::cmname_buffer_length,
644 "", CHECK);
645
646 _perf_last_failed_method =
647 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
648 CompilerCounters::cmname_buffer_length,
649 "", CHECK);
650
651 _perf_last_invalidated_method =
652 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
653 CompilerCounters::cmname_buffer_length,
654 "", CHECK);
655
656 _perf_last_compile_type =
657 PerfDataManager::create_variable(SUN_CI, "lastType",
658 PerfData::U_None,
659 (jlong)CompileBroker::no_compile,
660 CHECK);
661
662 _perf_last_compile_size =
663 PerfDataManager::create_variable(SUN_CI, "lastSize",
664 PerfData::U_Bytes,
665 (jlong)CompileBroker::no_compile,
666 CHECK);
667
668
669 _perf_last_failed_type =
670 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
671 PerfData::U_None,
672 (jlong)CompileBroker::no_compile,
673 CHECK);
674
675 _perf_last_invalidated_type =
676 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
677 PerfData::U_None,
678 (jlong)CompileBroker::no_compile,
679 CHECK);
680 }
681
682 _initialized = true;
683 }
684
685
686 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
687 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
688 JavaThread* thread = NULL;
689 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
690 instanceKlassHandle klass (THREAD, k);
691 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
692 Handle string = java_lang_String::create_from_str(name, CHECK_0);
693
694 // Initialize thread_oop to put it into the system threadGroup
695 Handle thread_group (THREAD, Universe::system_thread_group());
696 JavaValue result(T_VOID);
697 JavaCalls::call_special(&result, thread_oop,
698 klass,
699 vmSymbols::object_initializer_name(),
700 vmSymbols::threadgroup_string_void_signature(),
701 thread_group,
702 string,
703 CHECK_0);
704
705 {
706 MutexLocker mu(Threads_lock, THREAD);
707 if (compiler_thread) {
708 thread = new CompilerThread(queue, counters);
709 } else {
710 thread = new CodeCacheSweeperThread();
711 }
712 // At this point the new CompilerThread data-races with this startup
713 // thread (which I believe is the primoridal thread and NOT the VM
714 // thread). This means Java bytecodes being executed at startup can
715 // queue compile jobs which will run at whatever default priority the
716 // newly created CompilerThread runs at.
717
718
719 // At this point it may be possible that no osthread was created for the
720 // JavaThread due to lack of memory. We would have to throw an exception
721 // in that case. However, since this must work and we do not allow
722 // exceptions anyway, check and abort if this fails.
723
724 if (thread == NULL || thread->osthread() == NULL) {
725 vm_exit_during_initialization("java.lang.OutOfMemoryError",
726 os::native_thread_creation_failed_msg());
727 }
728
729 java_lang_Thread::set_thread(thread_oop(), thread);
730
731 // Note that this only sets the JavaThread _priority field, which by
732 // definition is limited to Java priorities and not OS priorities.
733 // The os-priority is set in the CompilerThread startup code itself
734
735 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
736
737 // Note that we cannot call os::set_priority because it expects Java
738 // priorities and we are *explicitly* using OS priorities so that it's
739 // possible to set the compiler thread priority higher than any Java
740 // thread.
741
742 int native_prio = CompilerThreadPriority;
743 if (native_prio == -1) {
744 if (UseCriticalCompilerThreadPriority) {
745 native_prio = os::java_to_os_priority[CriticalPriority];
746 } else {
747 native_prio = os::java_to_os_priority[NearMaxPriority];
748 }
749 }
750 os::set_native_priority(thread, native_prio);
751
752 java_lang_Thread::set_daemon(thread_oop());
753
754 thread->set_threadObj(thread_oop());
755 if (compiler_thread) {
756 thread->as_CompilerThread()->set_compiler(comp);
757 }
758 Threads::add(thread);
759 Thread::start(thread);
760 }
761
762 // Let go of Threads_lock before yielding
763 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
764
765 return thread;
766 }
767
768
769 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
770 EXCEPTION_MARK;
771 #if !defined(ZERO) && !defined(SHARK)
772 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
773 #endif // !ZERO && !SHARK
774 // Initialize the compilation queue
775 if (c2_compiler_count > 0) {
776 _c2_compile_queue = new CompileQueue("C2 compile queue");
777 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
778 }
779 if (c1_compiler_count > 0) {
780 _c1_compile_queue = new CompileQueue("C1 compile queue");
781 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
782 }
783
784 int compiler_count = c1_compiler_count + c2_compiler_count;
785
786 char name_buffer[256];
787 const bool compiler_thread = true;
788 for (int i = 0; i < c2_compiler_count; i++) {
789 // Create a name for our thread.
790 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
791 CompilerCounters* counters = new CompilerCounters();
792 // Shark and C2
793 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
794 }
795
796 for (int i = c2_compiler_count; i < compiler_count; i++) {
797 // Create a name for our thread.
798 sprintf(name_buffer, "C1 CompilerThread%d", i);
799 CompilerCounters* counters = new CompilerCounters();
800 // C1
801 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
802 }
803
804 if (UsePerfData) {
805 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
806 }
807
808 if (MethodFlushing) {
809 // Initialize the sweeper thread
810 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
811 }
812 }
813
814
815 /**
816 * Set the methods on the stack as on_stack so that redefine classes doesn't
817 * reclaim them. This method is executed at a safepoint.
818 */
819 void CompileBroker::mark_on_stack() {
820 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
821 // Since we are at a safepoint, we do not need a lock to access
822 // the compile queues.
823 if (_c2_compile_queue != NULL) {
824 _c2_compile_queue->mark_on_stack();
825 }
826 if (_c1_compile_queue != NULL) {
827 _c1_compile_queue->mark_on_stack();
828 }
829 }
830
831 // ------------------------------------------------------------------
832 // CompileBroker::compile_method
833 //
834 // Request compilation of a method.
835 void CompileBroker::compile_method_base(const methodHandle& method,
836 int osr_bci,
837 int comp_level,
838 const methodHandle& hot_method,
839 int hot_count,
840 const char* comment,
841 bool blocking,
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 CompileQueue* queue = compile_queue(comp_level);
921
922 // Acquire our lock.
923 {
924 MutexLocker locker(MethodCompileQueue_lock, thread);
925
926 // Make sure the method has not slipped into the queues since
927 // last we checked; note that those checks were "fast bail-outs".
928 // Here we need to be more careful, see 14012000 below.
929 if (compilation_is_in_queue(method)) {
930 return;
931 }
932
933 // We need to check again to see if the compilation has
934 // completed. A previous compilation may have registered
935 // some result.
936 if (compilation_is_complete(method, osr_bci, comp_level)) {
937 return;
938 }
939
940 // We now know that this compilation is not pending, complete,
941 // or prohibited. Assign a compile_id to this compilation
942 // and check to see if it is in our [Start..Stop) range.
943 int compile_id = assign_compile_id(method, osr_bci);
944 if (compile_id == 0) {
945 // The compilation falls outside the allowed range.
946 return;
947 }
948
949 #if INCLUDE_JVMCI
950 if (UseJVMCICompiler) {
951 if (blocking) {
952 // Don't allow blocking compiles for requests triggered by JVMCI.
953 if (thread->is_Compiler_thread()) {
954 blocking = false;
955 }
956
957 // Don't allow blocking compiles if inside a class initializer or while performing class loading
958 vframeStream vfst((JavaThread*) thread);
959 for (; !vfst.at_end(); vfst.next()) {
960 if (vfst.method()->is_static_initializer() ||
961 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
962 vfst.method()->name() == vmSymbols::loadClass_name())) {
963 blocking = false;
964 break;
965 }
966 }
967
968 // Don't allow blocking compilation requests to JVMCI
969 // if JVMCI itself is not yet initialized
970 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
971 blocking = false;
972 }
973
974 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
975 // to avoid deadlock between compiler thread(s) and threads run at shutdown
976 // such as the DestroyJavaVM thread.
977 if (JVMCIRuntime::shutdown_called()) {
978 blocking = false;
979 }
980 }
981 }
982 #endif // INCLUDE_JVMCI
983
984 // We will enter the compilation in the queue.
985 // 14012000: Note that this sets the queued_for_compile bits in
986 // the target method. We can now reason that a method cannot be
987 // queued for compilation more than once, as follows:
988 // Before a thread queues a task for compilation, it first acquires
989 // the compile queue lock, then checks if the method's queued bits
990 // are set or it has already been compiled. Thus there can not be two
991 // instances of a compilation task for the same method on the
992 // compilation queue. Consider now the case where the compilation
993 // thread has already removed a task for that method from the queue
994 // and is in the midst of compiling it. In this case, the
995 // queued_for_compile bits must be set in the method (and these
996 // will be visible to the current thread, since the bits were set
997 // under protection of the compile queue lock, which we hold now.
998 // When the compilation completes, the compiler thread first sets
999 // the compilation result and then clears the queued_for_compile
1000 // bits. Neither of these actions are protected by a barrier (or done
1001 // under the protection of a lock), so the only guarantee we have
1002 // (on machines with TSO (Total Store Order)) is that these values
1003 // will update in that order. As a result, the only combinations of
1004 // these bits that the current thread will see are, in temporal order:
1005 // <RESULT, QUEUE> :
1006 // <0, 1> : in compile queue, but not yet compiled
1007 // <1, 1> : compiled but queue bit not cleared
1008 // <1, 0> : compiled and queue bit cleared
1009 // Because we first check the queue bits then check the result bits,
1010 // we are assured that we cannot introduce a duplicate task.
1011 // Note that if we did the tests in the reverse order (i.e. check
1012 // result then check queued bit), we could get the result bit before
1013 // the compilation completed, and the queue bit after the compilation
1014 // completed, and end up introducing a "duplicate" (redundant) task.
1015 // In that case, the compiler thread should first check if a method
1016 // has already been compiled before trying to compile it.
1017 // NOTE: in the event that there are multiple compiler threads and
1018 // there is de-optimization/recompilation, things will get hairy,
1019 // and in that case it's best to protect both the testing (here) of
1020 // these bits, and their updating (here and elsewhere) under a
1021 // common lock.
1022 task = create_compile_task(queue,
1023 compile_id, method,
1024 osr_bci, comp_level,
1025 hot_method, hot_count, comment,
1026 blocking);
1027 }
1028
1029 if (blocking) {
1030 wait_for_completion(task);
1031 }
1032 }
1033
1034 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1035 int comp_level,
1036 const methodHandle& hot_method, int hot_count,
1037 const char* comment, Thread* THREAD) {
1038 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1039 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1040 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, comment, directive, THREAD);
1041 DirectivesStack::release(directive);
1042 return nm;
1043 }
1044
1045 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1046 int comp_level,
1047 const methodHandle& hot_method, int hot_count,
1048 const char* comment, DirectiveSet* directive,
1049 Thread* THREAD) {
1050
1051 // make sure arguments make sense
1052 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1053 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1054 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1055 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1056 // allow any levels for WhiteBox
1057 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1058 // return quickly if possible
1059
1060 // lock, make sure that the compilation
1061 // isn't prohibited in a straightforward way.
1062 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1063 if (comp == NULL || !comp->can_compile_method(method) ||
1064 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1065 return NULL;
1066 }
1067
1068 if (osr_bci == InvocationEntryBci) {
1069 // standard compilation
1070 nmethod* method_code = method->code();
1071 if (method_code != NULL) {
1072 if (compilation_is_complete(method, osr_bci, comp_level)) {
1073 return method_code;
1074 }
1075 }
1076 if (method->is_not_compilable(comp_level)) {
1077 return NULL;
1078 }
1079 } else {
1080 // osr compilation
1081 #ifndef TIERED
1082 // seems like an assert of dubious value
1083 assert(comp_level == CompLevel_highest_tier,
1084 "all OSR compiles are assumed to be at a single compilation level");
1085 #endif // TIERED
1086 // We accept a higher level osr method
1087 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1088 if (nm != NULL) return nm;
1089 if (method->is_not_osr_compilable(comp_level)) return NULL;
1090 }
1091
1092 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1093 // some prerequisites that are compiler specific
1094 if (comp->is_c2() || comp->is_shark()) {
1095 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1096 // Resolve all classes seen in the signature of the method
1097 // we are compiling.
1098 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1099 }
1100
1101 // If the method is native, do the lookup in the thread requesting
1102 // the compilation. Native lookups can load code, which is not
1103 // permitted during compilation.
1104 //
1105 // Note: A native method implies non-osr compilation which is
1106 // checked with an assertion at the entry of this method.
1107 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1108 bool in_base_library;
1109 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1110 if (HAS_PENDING_EXCEPTION) {
1111 // In case of an exception looking up the method, we just forget
1112 // about it. The interpreter will kick-in and throw the exception.
1113 method->set_not_compilable(); // implies is_not_osr_compilable()
1114 CLEAR_PENDING_EXCEPTION;
1115 return NULL;
1116 }
1117 assert(method->has_native_function(), "must have native code by now");
1118 }
1119
1120 // RedefineClasses() has replaced this method; just return
1121 if (method->is_old()) {
1122 return NULL;
1123 }
1124
1125 // JVMTI -- post_compile_event requires jmethod_id() that may require
1126 // a lock the compiling thread can not acquire. Prefetch it here.
1127 if (JvmtiExport::should_post_compiled_method_load()) {
1128 method->jmethod_id();
1129 }
1130
1131 // do the compilation
1132 if (method->is_native()) {
1133 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1134 // The following native methods:
1135 //
1136 // java.lang.Float.intBitsToFloat
1137 // java.lang.Float.floatToRawIntBits
1138 // java.lang.Double.longBitsToDouble
1139 // java.lang.Double.doubleToRawLongBits
1140 //
1141 // are called through the interpreter even if interpreter native stubs
1142 // are not preferred (i.e., calling through adapter handlers is preferred).
1143 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1144 // if the version of the methods from the native libraries is called.
1145 // As the interpreter and the C2-intrinsified version of the methods preserves
1146 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1147 if ((UseSSE >= 1 &&
1148 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1149 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1150 (UseSSE >= 2 &&
1151 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1152 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1153 return NULL;
1154 }
1155
1156 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1157 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1158 //
1159 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1160 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1161 AdapterHandlerLibrary::create_native_wrapper(method);
1162 } else {
1163 return NULL;
1164 }
1165 } else {
1166 // If the compiler is shut off due to code cache getting full
1167 // fail out now so blocking compiles dont hang the java thread
1168 if (!should_compile_new_jobs()) {
1169 CompilationPolicy::policy()->delay_compilation(method());
1170 return NULL;
1171 }
1172 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, !directive->BackgroundCompilationOption, THREAD);
1173 }
1174
1175 // return requested nmethod
1176 // We accept a higher level osr method
1177 if (osr_bci == InvocationEntryBci) {
1178 return method->code();
1179 }
1180 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1181 }
1182
1183
1184 // ------------------------------------------------------------------
1185 // CompileBroker::compilation_is_complete
1186 //
1187 // See if compilation of this method is already complete.
1188 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1189 int osr_bci,
1190 int comp_level) {
1191 bool is_osr = (osr_bci != standard_entry_bci);
1192 if (is_osr) {
1193 if (method->is_not_osr_compilable(comp_level)) {
1194 return true;
1195 } else {
1196 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1197 return (result != NULL);
1198 }
1199 } else {
1200 if (method->is_not_compilable(comp_level)) {
1201 return true;
1202 } else {
1203 nmethod* result = method->code();
1204 if (result == NULL) return false;
1205 return comp_level == result->comp_level();
1206 }
1207 }
1208 }
1209
1210
1211 /**
1212 * See if this compilation is already requested.
1213 *
1214 * Implementation note: there is only a single "is in queue" bit
1215 * for each method. This means that the check below is overly
1216 * conservative in the sense that an osr compilation in the queue
1217 * will block a normal compilation from entering the queue (and vice
1218 * versa). This can be remedied by a full queue search to disambiguate
1219 * cases. If it is deemed profitable, this may be done.
1220 */
1221 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1222 return method->queued_for_compilation();
1223 }
1224
1225 // ------------------------------------------------------------------
1226 // CompileBroker::compilation_is_prohibited
1227 //
1228 // See if this compilation is not allowed.
1229 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1230 bool is_native = method->is_native();
1231 // Some compilers may not support the compilation of natives.
1232 AbstractCompiler *comp = compiler(comp_level);
1233 if (is_native &&
1234 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1235 method->set_not_compilable_quietly(comp_level);
1236 return true;
1237 }
1238
1239 bool is_osr = (osr_bci != standard_entry_bci);
1240 // Some compilers may not support on stack replacement.
1241 if (is_osr &&
1242 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1243 method->set_not_osr_compilable(comp_level);
1244 return true;
1245 }
1246
1247 // The method may be explicitly excluded by the user.
1248 double scale;
1249 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1250 bool quietly = CompilerOracle::should_exclude_quietly();
1251 if (PrintCompilation && !quietly) {
1252 // This does not happen quietly...
1253 ResourceMark rm;
1254 tty->print("### Excluding %s:%s",
1255 method->is_native() ? "generation of native wrapper" : "compile",
1256 (method->is_static() ? " static" : ""));
1257 method->print_short_name(tty);
1258 tty->cr();
1259 }
1260 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1261 }
1262
1263 return false;
1264 }
1265
1266 /**
1267 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1268 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1269 * The function also allows to generate separate compilation IDs for OSR compilations.
1270 */
1271 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1272 #ifdef ASSERT
1273 bool is_osr = (osr_bci != standard_entry_bci);
1274 int id;
1275 if (method->is_native()) {
1276 assert(!is_osr, "can't be osr");
1277 // Adapters, native wrappers and method handle intrinsics
1278 // should be generated always.
1279 return Atomic::add(1, &_compilation_id);
1280 } else if (CICountOSR && is_osr) {
1281 id = Atomic::add(1, &_osr_compilation_id);
1282 if (CIStartOSR <= id && id < CIStopOSR) {
1283 return id;
1284 }
1285 } else {
1286 id = Atomic::add(1, &_compilation_id);
1287 if (CIStart <= id && id < CIStop) {
1288 return id;
1289 }
1290 }
1291
1292 // Method was not in the appropriate compilation range.
1293 method->set_not_compilable_quietly();
1294 return 0;
1295 #else
1296 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1297 // only _compilation_id is incremented.
1298 return Atomic::add(1, &_compilation_id);
1299 #endif
1300 }
1301
1302 // ------------------------------------------------------------------
1303 // CompileBroker::assign_compile_id_unlocked
1304 //
1305 // Public wrapper for assign_compile_id that acquires the needed locks
1306 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1307 MutexLocker locker(MethodCompileQueue_lock, thread);
1308 return assign_compile_id(method, osr_bci);
1309 }
1310
1311 /**
1312 * Should the current thread block until this compilation request
1313 * has been fulfilled?
1314 */
1315 bool CompileBroker::is_compile_blocking() {
1316 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1317 return !BackgroundCompilation;
1318 }
1319
1320
1321 // ------------------------------------------------------------------
1322 // CompileBroker::preload_classes
1323 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1324 // Move this code over from c1_Compiler.cpp
1325 ShouldNotReachHere();
1326 }
1327
1328
1329 // ------------------------------------------------------------------
1330 // CompileBroker::create_compile_task
1331 //
1332 // Create a CompileTask object representing the current request for
1333 // compilation. Add this task to the queue.
1334 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1335 int compile_id,
1336 const methodHandle& method,
1337 int osr_bci,
1338 int comp_level,
1339 const methodHandle& hot_method,
1340 int hot_count,
1341 const char* comment,
1342 bool blocking) {
1343 CompileTask* new_task = CompileTask::allocate();
1344 new_task->initialize(compile_id, method, osr_bci, comp_level,
1345 hot_method, hot_count, comment,
1346 blocking);
1347 queue->add(new_task);
1348 return new_task;
1349 }
1350
1351 #if INCLUDE_JVMCI
1352 // The number of milliseconds to wait before checking if
1353 // JVMCI compilation has made progress.
1354 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1355
1356 // The number of JVMCI compilation progress checks that must fail
1357 // before unblocking a thread waiting for a blocking compilation.
1358 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1359
1360 /**
1361 * Waits for a JVMCI compiler to complete a given task. This thread
1362 * waits until either the task completes or it sees no JVMCI compilation
1363 * progress for N consecutive milliseconds where N is
1364 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1365 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1366 *
1367 * @return true if this thread needs to free/recycle the task
1368 */
1369 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1370 MutexLocker waiter(task->lock(), thread);
1371 int progress_wait_attempts = 0;
1372 int methods_compiled = jvmci->methods_compiled();
1373 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1374 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1375 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1376
1377 bool progress;
1378 if (jvmci_compiler_thread != NULL) {
1379 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1380 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1381 } else {
1382 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1383 // that all JVMCI compiler threads are blocked on. We use the counter for
1384 // successful JVMCI compilations to determine whether JVMCI compilation
1385 // is still making progress through the JVMCI compiler queue.
1386 progress = jvmci->methods_compiled() != methods_compiled;
1387 }
1388
1389 if (!progress) {
1390 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1391 if (PrintCompilation) {
1392 task->print(tty, "wait for blocking compilation timed out");
1393 }
1394 break;
1395 }
1396 } else {
1397 progress_wait_attempts = 0;
1398 if (jvmci_compiler_thread == NULL) {
1399 methods_compiled = jvmci->methods_compiled();
1400 }
1401 }
1402 }
1403 task->clear_waiter();
1404 return task->is_complete();
1405 }
1406 #endif
1407
1408 /**
1409 * Wait for the compilation task to complete.
1410 */
1411 void CompileBroker::wait_for_completion(CompileTask* task) {
1412 if (CIPrintCompileQueue) {
1413 ttyLocker ttyl;
1414 tty->print_cr("BLOCKING FOR COMPILE");
1415 }
1416
1417 assert(task->is_blocking(), "can only wait on blocking task");
1418
1419 JavaThread* thread = JavaThread::current();
1420 thread->set_blocked_on_compilation(true);
1421
1422 methodHandle method(thread, task->method());
1423 bool free_task;
1424 #if INCLUDE_JVMCI
1425 AbstractCompiler* comp = compiler(task->comp_level());
1426 if (comp->is_jvmci()) {
1427 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1428 } else
1429 #endif
1430 {
1431 MutexLocker waiter(task->lock(), thread);
1432 free_task = true;
1433 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1434 task->lock()->wait();
1435 }
1436 }
1437
1438 thread->set_blocked_on_compilation(false);
1439 if (free_task) {
1440 if (is_compilation_disabled_forever()) {
1441 CompileTask::free(task);
1442 return;
1443 }
1444
1445 // It is harmless to check this status without the lock, because
1446 // completion is a stable property (until the task object is recycled).
1447 assert(task->is_complete(), "Compilation should have completed");
1448 assert(task->code_handle() == NULL, "must be reset");
1449
1450 // By convention, the waiter is responsible for recycling a
1451 // blocking CompileTask. Since there is only one waiter ever
1452 // waiting on a CompileTask, we know that no one else will
1453 // be using this CompileTask; we can free it.
1454 CompileTask::free(task);
1455 }
1456 }
1457
1458 /**
1459 * Initialize compiler thread(s) + compiler object(s). The postcondition
1460 * of this function is that the compiler runtimes are initialized and that
1461 * compiler threads can start compiling.
1462 */
1463 bool CompileBroker::init_compiler_runtime() {
1464 CompilerThread* thread = CompilerThread::current();
1465 AbstractCompiler* comp = thread->compiler();
1466 // Final sanity check - the compiler object must exist
1467 guarantee(comp != NULL, "Compiler object must exist");
1468
1469 int system_dictionary_modification_counter;
1470 {
1471 MutexLocker locker(Compile_lock, thread);
1472 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1473 }
1474
1475 {
1476 // Must switch to native to allocate ci_env
1477 ThreadToNativeFromVM ttn(thread);
1478 ciEnv ci_env(NULL, system_dictionary_modification_counter);
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 }
1493
1494 if (comp->is_failed()) {
1495 disable_compilation_forever();
1496 // If compiler initialization failed, no compiler thread that is specific to a
1497 // particular compiler runtime will ever start to compile methods.
1498 shutdown_compiler_runtime(comp, thread);
1499 return false;
1500 }
1501
1502 // C1 specific check
1503 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1504 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1505 return false;
1506 }
1507
1508 return true;
1509 }
1510
1511 /**
1512 * If C1 and/or C2 initialization failed, we shut down all compilation.
1513 * We do this to keep things simple. This can be changed if it ever turns
1514 * out to be a problem.
1515 */
1516 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1517 // Free buffer blob, if allocated
1518 if (thread->get_buffer_blob() != NULL) {
1519 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1520 CodeCache::free(thread->get_buffer_blob());
1521 }
1522
1523 if (comp->should_perform_shutdown()) {
1524 // There are two reasons for shutting down the compiler
1525 // 1) compiler runtime initialization failed
1526 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1527 warning("%s initialization failed. Shutting down all compilers", comp->name());
1528
1529 // Only one thread per compiler runtime object enters here
1530 // Set state to shut down
1531 comp->set_shut_down();
1532
1533 // Delete all queued compilation tasks to make compiler threads exit faster.
1534 if (_c1_compile_queue != NULL) {
1535 _c1_compile_queue->free_all();
1536 }
1537
1538 if (_c2_compile_queue != NULL) {
1539 _c2_compile_queue->free_all();
1540 }
1541
1542 // Set flags so that we continue execution with using interpreter only.
1543 UseCompiler = false;
1544 UseInterpreter = true;
1545
1546 // We could delete compiler runtimes also. However, there are references to
1547 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1548 // fail. This can be done later if necessary.
1549 }
1550 }
1551
1552 // ------------------------------------------------------------------
1553 // CompileBroker::compiler_thread_loop
1554 //
1555 // The main loop run by a CompilerThread.
1556 void CompileBroker::compiler_thread_loop() {
1557 CompilerThread* thread = CompilerThread::current();
1558 CompileQueue* queue = thread->queue();
1559 // For the thread that initializes the ciObjectFactory
1560 // this resource mark holds all the shared objects
1561 ResourceMark rm;
1562
1563 // First thread to get here will initialize the compiler interface
1564
1565 if (!ciObjectFactory::is_initialized()) {
1566 ASSERT_IN_VM;
1567 MutexLocker only_one (CompileThread_lock, thread);
1568 if (!ciObjectFactory::is_initialized()) {
1569 ciObjectFactory::initialize();
1570 }
1571 }
1572
1573 // Open a log.
1574 if (LogCompilation) {
1575 init_compiler_thread_log();
1576 }
1577 CompileLog* log = thread->log();
1578 if (log != NULL) {
1579 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1580 thread->name(),
1581 os::current_thread_id(),
1582 os::current_process_id());
1583 log->stamp();
1584 log->end_elem();
1585 }
1586
1587 // If compiler thread/runtime initialization fails, exit the compiler thread
1588 if (!init_compiler_runtime()) {
1589 return;
1590 }
1591
1592 // Poll for new compilation tasks as long as the JVM runs. Compilation
1593 // should only be disabled if something went wrong while initializing the
1594 // compiler runtimes. This, in turn, should not happen. The only known case
1595 // when compiler runtime initialization fails is if there is not enough free
1596 // space in the code cache to generate the necessary stubs, etc.
1597 while (!is_compilation_disabled_forever()) {
1598 // We need this HandleMark to avoid leaking VM handles.
1599 HandleMark hm(thread);
1600
1601 CompileTask* task = queue->get();
1602 if (task == NULL) {
1603 continue;
1604 }
1605
1606 // Give compiler threads an extra quanta. They tend to be bursty and
1607 // this helps the compiler to finish up the job.
1608 if (CompilerThreadHintNoPreempt) {
1609 os::hint_no_preempt();
1610 }
1611
1612 // Assign the task to the current thread. Mark this compilation
1613 // thread as active for the profiler.
1614 CompileTaskWrapper ctw(task);
1615 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1616 task->set_code_handle(&result_handle);
1617 methodHandle method(thread, task->method());
1618
1619 // Never compile a method if breakpoints are present in it
1620 if (method()->number_of_breakpoints() == 0) {
1621 // Compile the method.
1622 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1623 invoke_compiler_on_method(task);
1624 } else {
1625 // After compilation is disabled, remove remaining methods from queue
1626 method->clear_queued_for_compilation();
1627 task->set_failure_reason("compilation is disabled");
1628 }
1629 }
1630 }
1631
1632 // Shut down compiler runtime
1633 shutdown_compiler_runtime(thread->compiler(), thread);
1634 }
1635
1636 // ------------------------------------------------------------------
1637 // CompileBroker::init_compiler_thread_log
1638 //
1639 // Set up state required by +LogCompilation.
1640 void CompileBroker::init_compiler_thread_log() {
1641 CompilerThread* thread = CompilerThread::current();
1642 char file_name[4*K];
1643 FILE* fp = NULL;
1644 intx thread_id = os::current_thread_id();
1645 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1646 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1647 if (dir == NULL) {
1648 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1649 thread_id, os::current_process_id());
1650 } else {
1651 jio_snprintf(file_name, sizeof(file_name),
1652 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1653 os::file_separator(), thread_id, os::current_process_id());
1654 }
1655
1656 fp = fopen(file_name, "wt");
1657 if (fp != NULL) {
1658 if (LogCompilation && Verbose) {
1659 tty->print_cr("Opening compilation log %s", file_name);
1660 }
1661 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1662 thread->init_log(log);
1663
1664 if (xtty != NULL) {
1665 ttyLocker ttyl;
1666 // Record any per thread log files
1667 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1668 }
1669 return;
1670 }
1671 }
1672 warning("Cannot open log file: %s", file_name);
1673 }
1674
1675 void CompileBroker::log_metaspace_failure() {
1676 const char* message = "some methods may not be compiled because metaspace "
1677 "is out of memory";
1678 if (_compilation_log != NULL) {
1679 _compilation_log->log_metaspace_failure(message);
1680 }
1681 if (PrintCompilation) {
1682 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1683 }
1684 }
1685
1686
1687 // ------------------------------------------------------------------
1688 // CompileBroker::set_should_block
1689 //
1690 // Set _should_block.
1691 // Call this from the VM, with Threads_lock held and a safepoint requested.
1692 void CompileBroker::set_should_block() {
1693 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1694 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1695 #ifndef PRODUCT
1696 if (PrintCompilation && (Verbose || WizardMode))
1697 tty->print_cr("notifying compiler thread pool to block");
1698 #endif
1699 _should_block = true;
1700 }
1701
1702 // ------------------------------------------------------------------
1703 // CompileBroker::maybe_block
1704 //
1705 // Call this from the compiler at convenient points, to poll for _should_block.
1706 void CompileBroker::maybe_block() {
1707 if (_should_block) {
1708 #ifndef PRODUCT
1709 if (PrintCompilation && (Verbose || WizardMode))
1710 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1711 #endif
1712 ThreadInVMfromNative tivfn(JavaThread::current());
1713 }
1714 }
1715
1716 // wrapper for CodeCache::print_summary()
1717 static void codecache_print(bool detailed)
1718 {
1719 ResourceMark rm;
1720 stringStream s;
1721 // Dump code cache into a buffer before locking the tty,
1722 {
1723 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1724 CodeCache::print_summary(&s, detailed);
1725 }
1726 ttyLocker ttyl;
1727 tty->print("%s", s.as_string());
1728 }
1729
1730 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1731
1732 if (success) {
1733 task->mark_success();
1734 if (ci_env != NULL) {
1735 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1736 }
1737 if (_compilation_log != NULL) {
1738 nmethod* code = task->code();
1739 if (code != NULL) {
1740 _compilation_log->log_nmethod(thread, code);
1741 }
1742 }
1743 }
1744
1745 // simulate crash during compilation
1746 assert(task->compile_id() != CICrashAt, "just as planned");
1747 if (event.should_commit()) {
1748 event.set_method(task->method());
1749 event.set_compileID(task->compile_id());
1750 event.set_compileLevel(task->comp_level());
1751 event.set_succeded(task->is_success());
1752 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1753 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1754 event.set_inlinedBytes(task->num_inlined_bytecodes());
1755 event.commit();
1756 }
1757 }
1758
1759 int DirectivesStack::_depth = 0;
1760 CompilerDirectives* DirectivesStack::_top = NULL;
1761 CompilerDirectives* DirectivesStack::_bottom = NULL;
1762
1763 // ------------------------------------------------------------------
1764 // CompileBroker::invoke_compiler_on_method
1765 //
1766 // Compile a method.
1767 //
1768 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1769 if (PrintCompilation) {
1770 ResourceMark rm;
1771 task->print_tty();
1772 }
1773 elapsedTimer time;
1774
1775 CompilerThread* thread = CompilerThread::current();
1776 ResourceMark rm(thread);
1777
1778 if (LogEvents) {
1779 _compilation_log->log_compile(thread, task);
1780 }
1781
1782 // Common flags.
1783 uint compile_id = task->compile_id();
1784 int osr_bci = task->osr_bci();
1785 bool is_osr = (osr_bci != standard_entry_bci);
1786 bool should_log = (thread->log() != NULL);
1787 bool should_break = false;
1788 int task_level = task->comp_level();
1789
1790 DirectiveSet* directive;
1791 {
1792 // create the handle inside it's own block so it can't
1793 // accidentally be referenced once the thread transitions to
1794 // native. The NoHandleMark before the transition should catch
1795 // any cases where this occurs in the future.
1796 methodHandle method(thread, task->method());
1797 assert(!method->is_native(), "no longer compile natives");
1798
1799 // Look up matching directives
1800 directive = DirectivesStack::getMatchingDirective(method, compiler(task_level));
1801
1802 // Save information about this method in case of failure.
1803 set_last_compile(thread, method, is_osr, task_level);
1804
1805 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1806 }
1807
1808 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1809 if (should_log && !directive->LogOption) {
1810 should_log = false;
1811 }
1812
1813 // Allocate a new set of JNI handles.
1814 push_jni_handle_block();
1815 Method* target_handle = task->method();
1816 int compilable = ciEnv::MethodCompilable;
1817 const char* failure_reason = NULL;
1818 const char* retry_message = NULL;
1819 AbstractCompiler *comp = compiler(task_level);
1820
1821 int system_dictionary_modification_counter;
1822 {
1823 MutexLocker locker(Compile_lock, thread);
1824 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1825 }
1826 #if INCLUDE_JVMCI
1827 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1828 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1829
1830 TraceTime t1("compilation", &time);
1831 EventCompilation event;
1832
1833 JVMCIEnv env(task, system_dictionary_modification_counter);
1834 methodHandle method(thread, target_handle);
1835 jvmci->compile_method(method, osr_bci, &env);
1836
1837 post_compile(thread, task, event, task->code() != NULL, NULL);
1838
1839 failure_reason = env.failure_reason();
1840 if (!env.retryable()) {
1841 retry_message = "not retryable";
1842 compilable = ciEnv::MethodCompilable_not_at_tier;
1843 }
1844
1845 } else
1846 #endif // INCLUDE_JVMCI
1847 {
1848 NoHandleMark nhm;
1849 ThreadToNativeFromVM ttn(thread);
1850
1851 ciEnv ci_env(task, system_dictionary_modification_counter);
1852 if (should_break) {
1853 ci_env.set_break_at_compile(true);
1854 }
1855 if (should_log) {
1856 ci_env.set_log(thread->log());
1857 }
1858 assert(thread->env() == &ci_env, "set by ci_env");
1859 // The thread-env() field is cleared in ~CompileTaskWrapper.
1860
1861 // Cache Jvmti state
1862 ci_env.cache_jvmti_state();
1863
1864 // Cache DTrace flags
1865 ci_env.cache_dtrace_flags();
1866
1867 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1868
1869 TraceTime t1("compilation", &time);
1870 EventCompilation event;
1871
1872 if (comp == NULL) {
1873 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1874 } else {
1875 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1876 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1877 while (WhiteBox::compilation_locked) {
1878 locker.wait(Mutex::_no_safepoint_check_flag);
1879 }
1880 }
1881 comp->compile_method(&ci_env, target, osr_bci, directive);
1882 }
1883
1884 if (!ci_env.failing() && task->code() == NULL) {
1885 //assert(false, "compiler should always document failure");
1886 // The compiler elected, without comment, not to register a result.
1887 // Do not attempt further compilations of this method.
1888 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1889 }
1890
1891 // Copy this bit to the enclosing block:
1892 compilable = ci_env.compilable();
1893
1894 if (ci_env.failing()) {
1895 failure_reason = ci_env.failure_reason();
1896 retry_message = ci_env.retry_message();
1897 ci_env.report_failure(failure_reason);
1898 }
1899
1900 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1901 }
1902 // Remove the JNI handle block after the ciEnv destructor has run in
1903 // the previous block.
1904 pop_jni_handle_block();
1905
1906 if (failure_reason != NULL) {
1907 task->set_failure_reason(failure_reason);
1908 if (_compilation_log != NULL) {
1909 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1910 }
1911 if (PrintCompilation) {
1912 FormatBufferResource msg = retry_message != NULL ?
1913 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1914 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1915 task->print(tty, msg);
1916 }
1917 }
1918
1919 methodHandle method(thread, task->method());
1920
1921 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1922
1923 collect_statistics(thread, time, task);
1924
1925 nmethod* nm = task->code();
1926 if (nm != NULL) {
1927 nm->maybe_print_nmethod(directive);
1928 }
1929 DirectivesStack::release(directive);
1930
1931 if (PrintCompilation && PrintCompilation2) {
1932 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1933 tty->print("%4d ", compile_id); // print compilation number
1934 tty->print("%s ", (is_osr ? "%" : " "));
1935 if (task->code() != NULL) {
1936 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1937 }
1938 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1939 }
1940
1941 if (PrintCodeCacheOnCompilation)
1942 codecache_print(/* detailed= */ false);
1943
1944 // Disable compilation, if required.
1945 switch (compilable) {
1946 case ciEnv::MethodCompilable_never:
1947 if (is_osr)
1948 method->set_not_osr_compilable_quietly();
1949 else
1950 method->set_not_compilable_quietly();
1951 break;
1952 case ciEnv::MethodCompilable_not_at_tier:
1953 if (is_osr)
1954 method->set_not_osr_compilable_quietly(task_level);
1955 else
1956 method->set_not_compilable_quietly(task_level);
1957 break;
1958 }
1959
1960 // Note that the queued_for_compilation bits are cleared without
1961 // protection of a mutex. [They were set by the requester thread,
1962 // when adding the task to the compile queue -- at which time the
1963 // compile queue lock was held. Subsequently, we acquired the compile
1964 // queue lock to get this task off the compile queue; thus (to belabour
1965 // the point somewhat) our clearing of the bits must be occurring
1966 // only after the setting of the bits. See also 14012000 above.
1967 method->clear_queued_for_compilation();
1968
1969 #ifdef ASSERT
1970 if (CollectedHeap::fired_fake_oom()) {
1971 // The current compile received a fake OOM during compilation so
1972 // go ahead and exit the VM since the test apparently succeeded
1973 tty->print_cr("*** Shutting down VM after successful fake OOM");
1974 vm_exit(0);
1975 }
1976 #endif
1977 }
1978
1979 /**
1980 * The CodeCache is full. Print warning and disable compilation.
1981 * Schedule code cache cleaning so compilation can continue later.
1982 * This function needs to be called only from CodeCache::allocate(),
1983 * since we currently handle a full code cache uniformly.
1984 */
1985 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1986 UseInterpreter = true;
1987 if (UseCompiler || AlwaysCompileLoopMethods ) {
1988 if (xtty != NULL) {
1989 ResourceMark rm;
1990 stringStream s;
1991 // Dump code cache state into a buffer before locking the tty,
1992 // because log_state() will use locks causing lock conflicts.
1993 CodeCache::log_state(&s);
1994 // Lock to prevent tearing
1995 ttyLocker ttyl;
1996 xtty->begin_elem("code_cache_full");
1997 xtty->print("%s", s.as_string());
1998 xtty->stamp();
1999 xtty->end_elem();
2000 }
2001
2002 #ifndef PRODUCT
2003 if (CompileTheWorld || ExitOnFullCodeCache) {
2004 codecache_print(/* detailed= */ true);
2005 before_exit(JavaThread::current());
2006 exit_globals(); // will delete tty
2007 vm_direct_exit(CompileTheWorld ? 0 : 1);
2008 }
2009 #endif
2010 if (UseCodeCacheFlushing) {
2011 // Since code cache is full, immediately stop new compiles
2012 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2013 NMethodSweeper::log_sweep("disable_compiler");
2014 }
2015 } else {
2016 disable_compilation_forever();
2017 }
2018
2019 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2020 }
2021 }
2022
2023 // ------------------------------------------------------------------
2024 // CompileBroker::set_last_compile
2025 //
2026 // Record this compilation for debugging purposes.
2027 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2028 ResourceMark rm;
2029 char* method_name = method->name()->as_C_string();
2030 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2031 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2032 char current_method[CompilerCounters::cmname_buffer_length];
2033 size_t maxLen = CompilerCounters::cmname_buffer_length;
2034
2035 if (UsePerfData) {
2036 const char* class_name = method->method_holder()->name()->as_C_string();
2037
2038 size_t s1len = strlen(class_name);
2039 size_t s2len = strlen(method_name);
2040
2041 // check if we need to truncate the string
2042 if (s1len + s2len + 2 > maxLen) {
2043
2044 // the strategy is to lop off the leading characters of the
2045 // class name and the trailing characters of the method name.
2046
2047 if (s2len + 2 > maxLen) {
2048 // lop of the entire class name string, let snprintf handle
2049 // truncation of the method name.
2050 class_name += s1len; // null string
2051 }
2052 else {
2053 // lop off the extra characters from the front of the class name
2054 class_name += ((s1len + s2len + 2) - maxLen);
2055 }
2056 }
2057
2058 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2059 }
2060
2061 if (CICountOSR && is_osr) {
2062 _last_compile_type = osr_compile;
2063 } else {
2064 _last_compile_type = normal_compile;
2065 }
2066 _last_compile_level = comp_level;
2067
2068 if (UsePerfData) {
2069 CompilerCounters* counters = thread->counters();
2070 counters->set_current_method(current_method);
2071 counters->set_compile_type((jlong)_last_compile_type);
2072 }
2073 }
2074
2075
2076 // ------------------------------------------------------------------
2077 // CompileBroker::push_jni_handle_block
2078 //
2079 // Push on a new block of JNI handles.
2080 void CompileBroker::push_jni_handle_block() {
2081 JavaThread* thread = JavaThread::current();
2082
2083 // Allocate a new block for JNI handles.
2084 // Inlined code from jni_PushLocalFrame()
2085 JNIHandleBlock* java_handles = thread->active_handles();
2086 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2087 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2088 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2089 thread->set_active_handles(compile_handles);
2090 }
2091
2092
2093 // ------------------------------------------------------------------
2094 // CompileBroker::pop_jni_handle_block
2095 //
2096 // Pop off the current block of JNI handles.
2097 void CompileBroker::pop_jni_handle_block() {
2098 JavaThread* thread = JavaThread::current();
2099
2100 // Release our JNI handle block
2101 JNIHandleBlock* compile_handles = thread->active_handles();
2102 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2103 thread->set_active_handles(java_handles);
2104 compile_handles->set_pop_frame_link(NULL);
2105 JNIHandleBlock::release_block(compile_handles, thread); // may block
2106 }
2107
2108 // ------------------------------------------------------------------
2109 // CompileBroker::collect_statistics
2110 //
2111 // Collect statistics about the compilation.
2112
2113 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2114 bool success = task->is_success();
2115 methodHandle method (thread, task->method());
2116 uint compile_id = task->compile_id();
2117 bool is_osr = (task->osr_bci() != standard_entry_bci);
2118 nmethod* code = task->code();
2119 CompilerCounters* counters = thread->counters();
2120
2121 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2122 MutexLocker locker(CompileStatistics_lock);
2123
2124 // _perf variables are production performance counters which are
2125 // updated regardless of the setting of the CITime and CITimeEach flags
2126 //
2127
2128 // account all time, including bailouts and failures in this counter;
2129 // C1 and C2 counters are counting both successful and unsuccessful compiles
2130 _t_total_compilation.add(time);
2131
2132 if (!success) {
2133 _total_bailout_count++;
2134 if (UsePerfData) {
2135 _perf_last_failed_method->set_value(counters->current_method());
2136 _perf_last_failed_type->set_value(counters->compile_type());
2137 _perf_total_bailout_count->inc();
2138 }
2139 _t_bailedout_compilation.add(time);
2140 } else if (code == NULL) {
2141 if (UsePerfData) {
2142 _perf_last_invalidated_method->set_value(counters->current_method());
2143 _perf_last_invalidated_type->set_value(counters->compile_type());
2144 _perf_total_invalidated_count->inc();
2145 }
2146 _total_invalidated_count++;
2147 _t_invalidated_compilation.add(time);
2148 } else {
2149 // Compilation succeeded
2150
2151 // update compilation ticks - used by the implementation of
2152 // java.lang.management.CompilationMBean
2153 _perf_total_compilation->inc(time.ticks());
2154 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2155
2156 if (CITime) {
2157 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2158 if (is_osr) {
2159 _t_osr_compilation.add(time);
2160 _sum_osr_bytes_compiled += bytes_compiled;
2161 } else {
2162 _t_standard_compilation.add(time);
2163 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2164 }
2165
2166 #if INCLUDE_JVMCI
2167 AbstractCompiler* comp = compiler(task->comp_level());
2168 if (comp) {
2169 CompilerStatistics* stats = comp->stats();
2170 if (stats) {
2171 if (is_osr) {
2172 stats->_osr.update(time, bytes_compiled);
2173 } else {
2174 stats->_standard.update(time, bytes_compiled);
2175 }
2176 stats->_nmethods_size += code->total_size();
2177 stats->_nmethods_code_size += code->insts_size();
2178 } else { // if (!stats)
2179 assert(false, "Compiler statistics object must exist");
2180 }
2181 } else { // if (!comp)
2182 assert(false, "Compiler object must exist");
2183 }
2184 #endif // INCLUDE_JVMCI
2185 }
2186
2187 if (UsePerfData) {
2188 // save the name of the last method compiled
2189 _perf_last_method->set_value(counters->current_method());
2190 _perf_last_compile_type->set_value(counters->compile_type());
2191 _perf_last_compile_size->set_value(method->code_size() +
2192 task->num_inlined_bytecodes());
2193 if (is_osr) {
2194 _perf_osr_compilation->inc(time.ticks());
2195 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2196 } else {
2197 _perf_standard_compilation->inc(time.ticks());
2198 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2199 }
2200 }
2201
2202 if (CITimeEach) {
2203 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2204 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2205 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2206 }
2207
2208 // Collect counts of successful compilations
2209 _sum_nmethod_size += code->total_size();
2210 _sum_nmethod_code_size += code->insts_size();
2211 _total_compile_count++;
2212
2213 if (UsePerfData) {
2214 _perf_sum_nmethod_size->inc( code->total_size());
2215 _perf_sum_nmethod_code_size->inc(code->insts_size());
2216 _perf_total_compile_count->inc();
2217 }
2218
2219 if (is_osr) {
2220 if (UsePerfData) _perf_total_osr_compile_count->inc();
2221 _total_osr_compile_count++;
2222 } else {
2223 if (UsePerfData) _perf_total_standard_compile_count->inc();
2224 _total_standard_compile_count++;
2225 }
2226 }
2227 // set the current method for the thread to null
2228 if (UsePerfData) counters->set_current_method("");
2229 }
2230
2231 const char* CompileBroker::compiler_name(int comp_level) {
2232 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2233 if (comp == NULL) {
2234 return "no compiler";
2235 } else {
2236 return (comp->name());
2237 }
2238 }
2239
2240 #if INCLUDE_JVMCI
2241 void CompileBroker::print_times(AbstractCompiler* comp) {
2242 CompilerStatistics* stats = comp->stats();
2243 if (stats) {
2244 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}",
2245 comp->name(), stats->bytes_per_second(),
2246 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2247 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2248 stats->_nmethods_size, stats->_nmethods_code_size);
2249 } else { // if (!stats)
2250 assert(false, "Compiler statistics object must exist");
2251 }
2252 comp->print_timers();
2253 }
2254 #endif // INCLUDE_JVMCI
2255
2256 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2257 #if INCLUDE_JVMCI
2258 elapsedTimer standard_compilation;
2259 elapsedTimer total_compilation;
2260 elapsedTimer osr_compilation;
2261
2262 int standard_bytes_compiled = 0;
2263 int osr_bytes_compiled = 0;
2264
2265 int standard_compile_count = 0;
2266 int osr_compile_count = 0;
2267 int total_compile_count = 0;
2268
2269 int nmethods_size = 0;
2270 int nmethods_code_size = 0;
2271 bool printedHeader = false;
2272
2273 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2274 AbstractCompiler* comp = _compilers[i];
2275 if (comp != NULL) {
2276 if (per_compiler && aggregate && !printedHeader) {
2277 printedHeader = true;
2278 tty->cr();
2279 tty->print_cr("Individual compiler times (for compiled methods only)");
2280 tty->print_cr("------------------------------------------------");
2281 tty->cr();
2282 }
2283 CompilerStatistics* stats = comp->stats();
2284
2285 if (stats) {
2286 standard_compilation.add(stats->_standard._time);
2287 osr_compilation.add(stats->_osr._time);
2288
2289 standard_bytes_compiled += stats->_standard._bytes;
2290 osr_bytes_compiled += stats->_osr._bytes;
2291
2292 standard_compile_count += stats->_standard._count;
2293 osr_compile_count += stats->_osr._count;
2294
2295 nmethods_size += stats->_nmethods_size;
2296 nmethods_code_size += stats->_nmethods_code_size;
2297 } else { // if (!stats)
2298 assert(false, "Compiler statistics object must exist");
2299 }
2300
2301 if (per_compiler) {
2302 print_times(comp);
2303 }
2304 }
2305 }
2306 total_compile_count = osr_compile_count + standard_compile_count;
2307 total_compilation.add(osr_compilation);
2308 total_compilation.add(standard_compilation);
2309
2310 // In hosted mode, print the JVMCI compiler specific counters manually.
2311 if (!UseJVMCICompiler) {
2312 JVMCICompiler::print_compilation_timers();
2313 }
2314 #else // INCLUDE_JVMCI
2315 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2316 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2317 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2318
2319 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2320 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2321
2322 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2323 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2324 int total_compile_count = CompileBroker::_total_compile_count;
2325
2326 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2327 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2328 #endif // INCLUDE_JVMCI
2329
2330 if (!aggregate) {
2331 return;
2332 }
2333 tty->cr();
2334 tty->print_cr("Accumulated compiler times");
2335 tty->print_cr("----------------------------------------------------------");
2336 //0000000000111111111122222222223333333333444444444455555555556666666666
2337 //0123456789012345678901234567890123456789012345678901234567890123456789
2338 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2339 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2340 standard_compilation.seconds(),
2341 standard_compilation.seconds() / standard_compile_count);
2342 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2343 CompileBroker::_t_bailedout_compilation.seconds(),
2344 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2345 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2346 osr_compilation.seconds(),
2347 osr_compilation.seconds() / osr_compile_count);
2348 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2349 CompileBroker::_t_invalidated_compilation.seconds(),
2350 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2351
2352 AbstractCompiler *comp = compiler(CompLevel_simple);
2353 if (comp != NULL) {
2354 tty->cr();
2355 comp->print_timers();
2356 }
2357 comp = compiler(CompLevel_full_optimization);
2358 if (comp != NULL) {
2359 tty->cr();
2360 comp->print_timers();
2361 }
2362 tty->cr();
2363 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2364 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2365 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2366 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2367 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2368 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2369 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2370 double tcs = total_compilation.seconds();
2371 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2372 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2373 tty->cr();
2374 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2375 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2376 }
2377
2378 // Debugging output for failure
2379 void CompileBroker::print_last_compile() {
2380 if ( _last_compile_level != CompLevel_none &&
2381 compiler(_last_compile_level) != NULL &&
2382 _last_method_compiled != NULL &&
2383 _last_compile_type != no_compile) {
2384 if (_last_compile_type == osr_compile) {
2385 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2386 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2387 } else {
2388 tty->print_cr("Last parse: %d+++(%d) %s",
2389 _compilation_id, _last_compile_level, _last_method_compiled);
2390 }
2391 }
2392 }
2393