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