1 /*
2 * Copyright (c) 1999, 2017, 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 "memory/resourceArea.hpp"
38 #include "oops/methodData.hpp"
39 #include "oops/method.hpp"
40 #include "oops/oop.inline.hpp"
41 #include "prims/jvm.h"
42 #include "prims/nativeLookup.hpp"
43 #include "prims/whitebox.hpp"
44 #include "runtime/arguments.hpp"
45 #include "runtime/atomic.hpp"
46 #include "runtime/compilationPolicy.hpp"
47 #include "runtime/init.hpp"
48 #include "runtime/interfaceSupport.hpp"
49 #include "runtime/javaCalls.hpp"
50 #include "runtime/os.hpp"
51 #include "runtime/sharedRuntime.hpp"
52 #include "runtime/sweeper.hpp"
53 #include "runtime/timerTrace.hpp"
54 #include "trace/tracing.hpp"
55 #include "utilities/debug.hpp"
56 #include "utilities/dtrace.hpp"
57 #include "utilities/events.hpp"
58 #include "utilities/formatBuffer.hpp"
59 #ifdef COMPILER1
60 #include "c1/c1_Compiler.hpp"
61 #endif
62 #if INCLUDE_JVMCI
63 #include "jvmci/jvmciCompiler.hpp"
64 #include "jvmci/jvmciRuntime.hpp"
65 #include "jvmci/jvmciJavaClasses.hpp"
66 #include "runtime/vframe.hpp"
67 #endif
68 #ifdef COMPILER2
69 #include "opto/c2compiler.hpp"
70 #endif
71 #ifdef SHARK
72 #include "shark/sharkCompiler.hpp"
73 #endif
74
75 #ifdef DTRACE_ENABLED
76
77 // Only bother with this argument setup if dtrace is available
78
79 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
80 { \
81 Symbol* klass_name = (method)->klass_name(); \
82 Symbol* name = (method)->name(); \
83 Symbol* signature = (method)->signature(); \
84 HOTSPOT_METHOD_COMPILE_BEGIN( \
85 (char *) comp_name, strlen(comp_name), \
86 (char *) klass_name->bytes(), klass_name->utf8_length(), \
87 (char *) name->bytes(), name->utf8_length(), \
88 (char *) signature->bytes(), signature->utf8_length()); \
89 }
90
91 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
92 { \
93 Symbol* klass_name = (method)->klass_name(); \
94 Symbol* name = (method)->name(); \
95 Symbol* signature = (method)->signature(); \
96 HOTSPOT_METHOD_COMPILE_END( \
97 (char *) comp_name, strlen(comp_name), \
98 (char *) klass_name->bytes(), klass_name->utf8_length(), \
99 (char *) name->bytes(), name->utf8_length(), \
100 (char *) signature->bytes(), signature->utf8_length(), (success)); \
101 }
102
103 #else // ndef DTRACE_ENABLED
104
105 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
106 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
107
108 #endif // ndef DTRACE_ENABLED
109
110 bool CompileBroker::_initialized = false;
111 volatile bool CompileBroker::_should_block = false;
112 volatile jint CompileBroker::_print_compilation_warning = 0;
113 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
114
115 // The installed compiler(s)
116 AbstractCompiler* CompileBroker::_compilers[2];
117
118 // These counters are used to assign an unique ID to each compilation.
119 volatile jint CompileBroker::_compilation_id = 0;
120 volatile jint CompileBroker::_osr_compilation_id = 0;
121
122 // Debugging information
123 int CompileBroker::_last_compile_type = no_compile;
124 int CompileBroker::_last_compile_level = CompLevel_none;
125 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
126
127 // Performance counters
128 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
129 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
130 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
131
132 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
133 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
134 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
135 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
136 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
137
138 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
139 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
140 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
141 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
142
143 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
144 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
145 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
146 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
147 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
148 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
149 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
150
151 // Timers and counters for generating statistics
152 elapsedTimer CompileBroker::_t_total_compilation;
153 elapsedTimer CompileBroker::_t_osr_compilation;
154 elapsedTimer CompileBroker::_t_standard_compilation;
155 elapsedTimer CompileBroker::_t_invalidated_compilation;
156 elapsedTimer CompileBroker::_t_bailedout_compilation;
157
158 int CompileBroker::_total_bailout_count = 0;
159 int CompileBroker::_total_invalidated_count = 0;
160 int CompileBroker::_total_compile_count = 0;
161 int CompileBroker::_total_osr_compile_count = 0;
162 int CompileBroker::_total_standard_compile_count = 0;
163
164 int CompileBroker::_sum_osr_bytes_compiled = 0;
165 int CompileBroker::_sum_standard_bytes_compiled = 0;
166 int CompileBroker::_sum_nmethod_size = 0;
167 int CompileBroker::_sum_nmethod_code_size = 0;
168
169 long CompileBroker::_peak_compilation_time = 0;
170
171 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
172 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
173
174
175
176 class CompilationLog : public StringEventLog {
177 public:
178 CompilationLog() : StringEventLog("Compilation events") {
179 }
180
181 void log_compile(JavaThread* thread, CompileTask* task) {
182 StringLogMessage lm;
183 stringStream sstr = lm.stream();
184 // msg.time_stamp().update_to(tty->time_stamp().ticks());
185 task->print(&sstr, NULL, true, false);
186 log(thread, "%s", (const char*)lm);
187 }
188
189 void log_nmethod(JavaThread* thread, nmethod* nm) {
190 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
191 nm->compile_id(), nm->is_osr_method() ? "%" : "",
192 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
193 }
194
195 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
196 StringLogMessage lm;
197 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
198 if (retry_message != NULL) {
199 lm.append(" (%s)", retry_message);
200 }
201 lm.print("\n");
202 log(thread, "%s", (const char*)lm);
203 }
204
205 void log_metaspace_failure(const char* reason) {
206 ResourceMark rm;
207 StringLogMessage lm;
208 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
209 lm.print("\n");
210 log(JavaThread::current(), "%s", (const char*)lm);
211 }
212 };
213
214 static CompilationLog* _compilation_log = NULL;
215
216 bool compileBroker_init() {
217 if (LogEvents) {
218 _compilation_log = new CompilationLog();
219 }
220
221 // init directives stack, adding default directive
222 DirectivesStack::init();
223
224 if (DirectivesParser::has_file()) {
225 return DirectivesParser::parse_from_flag();
226 } else if (CompilerDirectivesPrint) {
227 // Print default directive even when no other was added
228 DirectivesStack::print(tty);
229 }
230
231 return true;
232 }
233
234 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
235 CompilerThread* thread = CompilerThread::current();
236 thread->set_task(task);
237 #if INCLUDE_JVMCI
238 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
239 task->set_jvmci_compiler_thread(thread);
240 }
241 #endif
242 CompileLog* log = thread->log();
243 if (log != NULL) task->log_task_start(log);
244 }
245
246 CompileTaskWrapper::~CompileTaskWrapper() {
247 CompilerThread* thread = CompilerThread::current();
248 CompileTask* task = thread->task();
249 CompileLog* log = thread->log();
250 if (log != NULL) task->log_task_done(log);
251 thread->set_task(NULL);
252 task->set_code_handle(NULL);
253 thread->set_env(NULL);
254 if (task->is_blocking()) {
255 bool free_task = false;
256 {
257 MutexLocker notifier(task->lock(), thread);
258 task->mark_complete();
259 #if INCLUDE_JVMCI
260 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
261 if (!task->has_waiter()) {
262 // The waiting thread timed out and thus did not free the task.
263 free_task = true;
264 }
265 task->set_jvmci_compiler_thread(NULL);
266 }
267 #endif
268 if (!free_task) {
269 // Notify the waiting thread that the compilation has completed
270 // so that it can free the task.
271 task->lock()->notify_all();
272 }
273 }
274 if (free_task) {
275 // The task can only be freed once the task lock is released.
276 CompileTask::free(task);
277 }
278 } else {
279 task->mark_complete();
280
281 // By convention, the compiling thread is responsible for
282 // recycling a non-blocking CompileTask.
283 CompileTask::free(task);
284 }
285 }
286
287 /**
288 * Add a CompileTask to a CompileQueue.
289 */
290 void CompileQueue::add(CompileTask* task) {
291 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
292
293 task->set_next(NULL);
294 task->set_prev(NULL);
295
296 if (_last == NULL) {
297 // The compile queue is empty.
298 assert(_first == NULL, "queue is empty");
299 _first = task;
300 _last = task;
301 } else {
302 // Append the task to the queue.
303 assert(_last->next() == NULL, "not last");
304 _last->set_next(task);
305 task->set_prev(_last);
306 _last = task;
307 }
308 ++_size;
309
310 // Mark the method as being in the compile queue.
311 task->method()->set_queued_for_compilation();
312
313 if (CIPrintCompileQueue) {
314 print_tty();
315 }
316
317 if (LogCompilation && xtty != NULL) {
318 task->log_task_queued();
319 }
320
321 // Notify CompilerThreads that a task is available.
322 MethodCompileQueue_lock->notify_all();
323 }
324
325 /**
326 * Empties compilation queue by putting all compilation tasks onto
327 * a freelist. Furthermore, the method wakes up all threads that are
328 * waiting on a compilation task to finish. This can happen if background
329 * compilation is disabled.
330 */
331 void CompileQueue::free_all() {
332 MutexLocker mu(MethodCompileQueue_lock);
333 CompileTask* next = _first;
334
335 // Iterate over all tasks in the compile queue
336 while (next != NULL) {
337 CompileTask* current = next;
338 next = current->next();
339 {
340 // Wake up thread that blocks on the compile task.
341 MutexLocker ct_lock(current->lock());
342 current->lock()->notify();
343 }
344 // Put the task back on the freelist.
345 CompileTask::free(current);
346 }
347 _first = NULL;
348
349 // Wake up all threads that block on the queue.
350 MethodCompileQueue_lock->notify_all();
351 }
352
353 /**
354 * Get the next CompileTask from a CompileQueue
355 */
356 CompileTask* CompileQueue::get() {
357 // save methods from RedefineClasses across safepoint
358 // across MethodCompileQueue_lock below.
359 methodHandle save_method;
360 methodHandle save_hot_method;
361
362 MutexLocker locker(MethodCompileQueue_lock);
363 // If _first is NULL we have no more compile jobs. There are two reasons for
364 // having no compile jobs: First, we compiled everything we wanted. Second,
365 // we ran out of code cache so compilation has been disabled. In the latter
366 // case we perform code cache sweeps to free memory such that we can re-enable
367 // compilation.
368 while (_first == NULL) {
369 // Exit loop if compilation is disabled forever
370 if (CompileBroker::is_compilation_disabled_forever()) {
371 return NULL;
372 }
373
374 // If there are no compilation tasks and we can compile new jobs
375 // (i.e., there is enough free space in the code cache) there is
376 // no need to invoke the sweeper. As a result, the hotness of methods
377 // remains unchanged. This behavior is desired, since we want to keep
378 // the stable state, i.e., we do not want to evict methods from the
379 // code cache if it is unnecessary.
380 // We need a timed wait here, since compiler threads can exit if compilation
381 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
382 // is not critical and we do not want idle compiler threads to wake up too often.
383 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
384 }
385
386 if (CompileBroker::is_compilation_disabled_forever()) {
387 return NULL;
388 }
389
390 CompileTask* task;
391 {
392 NoSafepointVerifier nsv;
393 task = CompilationPolicy::policy()->select_task(this);
394 }
395
396 if (task != NULL) {
397 // Save method pointers across unlock safepoint. The task is removed from
398 // the compilation queue, which is walked during RedefineClasses.
399 save_method = methodHandle(task->method());
400 save_hot_method = methodHandle(task->hot_method());
401
402 remove(task);
403 purge_stale_tasks(); // may temporarily release MCQ lock
404 }
405
406 return task;
407 }
408
409 // Clean & deallocate stale compile tasks.
410 // Temporarily releases MethodCompileQueue lock.
411 void CompileQueue::purge_stale_tasks() {
412 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
413 if (_first_stale != NULL) {
414 // Stale tasks are purged when MCQ lock is released,
415 // but _first_stale updates are protected by MCQ lock.
416 // Once task processing starts and MCQ lock is released,
417 // other compiler threads can reuse _first_stale.
418 CompileTask* head = _first_stale;
419 _first_stale = NULL;
420 {
421 MutexUnlocker ul(MethodCompileQueue_lock);
422 for (CompileTask* task = head; task != NULL; ) {
423 CompileTask* next_task = task->next();
424 CompileTaskWrapper ctw(task); // Frees the task
425 task->set_failure_reason("stale task");
426 task = next_task;
427 }
428 }
429 }
430 }
431
432 void CompileQueue::remove(CompileTask* task) {
433 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
434 if (task->prev() != NULL) {
435 task->prev()->set_next(task->next());
436 } else {
437 // max is the first element
438 assert(task == _first, "Sanity");
439 _first = task->next();
440 }
441
442 if (task->next() != NULL) {
443 task->next()->set_prev(task->prev());
444 } else {
445 // max is the last element
446 assert(task == _last, "Sanity");
447 _last = task->prev();
448 }
449 --_size;
450 }
451
452 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
453 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
454 remove(task);
455
456 // Enqueue the task for reclamation (should be done outside MCQ lock)
457 task->set_next(_first_stale);
458 task->set_prev(NULL);
459 _first_stale = task;
460 }
461
462 // methods in the compile queue need to be marked as used on the stack
463 // so that they don't get reclaimed by Redefine Classes
464 void CompileQueue::mark_on_stack() {
465 CompileTask* task = _first;
466 while (task != NULL) {
467 task->mark_on_stack();
468 task = task->next();
469 }
470 }
471
472
473 CompileQueue* CompileBroker::compile_queue(int comp_level) {
474 if (is_c2_compile(comp_level)) return _c2_compile_queue;
475 if (is_c1_compile(comp_level)) return _c1_compile_queue;
476 return NULL;
477 }
478
479 void CompileBroker::print_compile_queues(outputStream* st) {
480 st->print_cr("Current compiles: ");
481 MutexLocker locker(MethodCompileQueue_lock);
482
483 char buf[2000];
484 int buflen = sizeof(buf);
485 Threads::print_threads_compiling(st, buf, buflen);
486
487 st->cr();
488 if (_c1_compile_queue != NULL) {
489 _c1_compile_queue->print(st);
490 }
491 if (_c2_compile_queue != NULL) {
492 _c2_compile_queue->print(st);
493 }
494 }
495
496 void CompileQueue::print(outputStream* st) {
497 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
498 st->print_cr("%s:", name());
499 CompileTask* task = _first;
500 if (task == NULL) {
501 st->print_cr("Empty");
502 } else {
503 while (task != NULL) {
504 task->print(st, NULL, true, true);
505 task = task->next();
506 }
507 }
508 st->cr();
509 }
510
511 void CompileQueue::print_tty() {
512 ttyLocker ttyl;
513 print(tty);
514 }
515
516 CompilerCounters::CompilerCounters() {
517 _current_method[0] = '\0';
518 _compile_type = CompileBroker::no_compile;
519 }
520
521 // ------------------------------------------------------------------
522 // CompileBroker::compilation_init
523 //
524 // Initialize the Compilation object
525 void CompileBroker::compilation_init(TRAPS) {
526 _last_method_compiled[0] = '\0';
527
528 // No need to initialize compilation system if we do not use it.
529 if (!UseCompiler) {
530 return;
531 }
532 #ifndef SHARK
533 // Set the interface to the current compiler(s).
534 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
535 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
536
537 #if INCLUDE_JVMCI
538 if (EnableJVMCI) {
539 // This is creating a JVMCICompiler singleton.
540 JVMCICompiler* jvmci = new JVMCICompiler();
541
542 if (UseJVMCICompiler) {
543 _compilers[1] = jvmci;
544 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
545 if (BootstrapJVMCI) {
546 // JVMCI will bootstrap so give it more threads
547 c2_count = MIN2(32, os::active_processor_count());
548 }
549 } else {
550 c2_count = JVMCIThreads;
551 }
552 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
553 } else {
554 c1_count = JVMCIHostThreads;
555 }
556 }
557 }
558 #endif // INCLUDE_JVMCI
559
560 #ifdef COMPILER1
561 if (c1_count > 0) {
562 _compilers[0] = new Compiler();
563 }
564 #endif // COMPILER1
565
566 #ifdef COMPILER2
567 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
568 if (c2_count > 0) {
569 _compilers[1] = new C2Compiler();
570 }
571 }
572 #endif // COMPILER2
573
574 #else // SHARK
575 int c1_count = 0;
576 int c2_count = 1;
577
578 _compilers[1] = new SharkCompiler();
579 #endif // SHARK
580
581 // Start the compiler thread(s) and the sweeper thread
582 init_compiler_sweeper_threads(c1_count, c2_count);
583 // totalTime performance counter is always created as it is required
584 // by the implementation of java.lang.management.CompilationMBean.
585 {
586 EXCEPTION_MARK;
587 _perf_total_compilation =
588 PerfDataManager::create_counter(JAVA_CI, "totalTime",
589 PerfData::U_Ticks, CHECK);
590 }
591
592 if (UsePerfData) {
593
594 EXCEPTION_MARK;
595
596 // create the jvmstat performance counters
597 _perf_osr_compilation =
598 PerfDataManager::create_counter(SUN_CI, "osrTime",
599 PerfData::U_Ticks, CHECK);
600
601 _perf_standard_compilation =
602 PerfDataManager::create_counter(SUN_CI, "standardTime",
603 PerfData::U_Ticks, CHECK);
604
605 _perf_total_bailout_count =
606 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
607 PerfData::U_Events, CHECK);
608
609 _perf_total_invalidated_count =
610 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
611 PerfData::U_Events, CHECK);
612
613 _perf_total_compile_count =
614 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
615 PerfData::U_Events, CHECK);
616 _perf_total_osr_compile_count =
617 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
618 PerfData::U_Events, CHECK);
619
620 _perf_total_standard_compile_count =
621 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
622 PerfData::U_Events, CHECK);
623
624 _perf_sum_osr_bytes_compiled =
625 PerfDataManager::create_counter(SUN_CI, "osrBytes",
626 PerfData::U_Bytes, CHECK);
627
628 _perf_sum_standard_bytes_compiled =
629 PerfDataManager::create_counter(SUN_CI, "standardBytes",
630 PerfData::U_Bytes, CHECK);
631
632 _perf_sum_nmethod_size =
633 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
634 PerfData::U_Bytes, CHECK);
635
636 _perf_sum_nmethod_code_size =
637 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
638 PerfData::U_Bytes, CHECK);
639
640 _perf_last_method =
641 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
642 CompilerCounters::cmname_buffer_length,
643 "", CHECK);
644
645 _perf_last_failed_method =
646 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
647 CompilerCounters::cmname_buffer_length,
648 "", CHECK);
649
650 _perf_last_invalidated_method =
651 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
652 CompilerCounters::cmname_buffer_length,
653 "", CHECK);
654
655 _perf_last_compile_type =
656 PerfDataManager::create_variable(SUN_CI, "lastType",
657 PerfData::U_None,
658 (jlong)CompileBroker::no_compile,
659 CHECK);
660
661 _perf_last_compile_size =
662 PerfDataManager::create_variable(SUN_CI, "lastSize",
663 PerfData::U_Bytes,
664 (jlong)CompileBroker::no_compile,
665 CHECK);
666
667
668 _perf_last_failed_type =
669 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
670 PerfData::U_None,
671 (jlong)CompileBroker::no_compile,
672 CHECK);
673
674 _perf_last_invalidated_type =
675 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
676 PerfData::U_None,
677 (jlong)CompileBroker::no_compile,
678 CHECK);
679 }
680
681 _initialized = true;
682 }
683
684
685 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
686 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
687 JavaThread* thread = NULL;
688 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
689 InstanceKlass* klass = InstanceKlass::cast(k);
690 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
691 Handle string = java_lang_String::create_from_str(name, CHECK_0);
692
693 // Initialize thread_oop to put it into the system threadGroup
694 Handle thread_group (THREAD, Universe::system_thread_group());
695 JavaValue result(T_VOID);
696 JavaCalls::call_special(&result, thread_oop,
697 klass,
698 vmSymbols::object_initializer_name(),
699 vmSymbols::threadgroup_string_void_signature(),
700 thread_group,
701 string,
702 CHECK_0);
703
704 {
705 MutexLocker mu(Threads_lock, THREAD);
706 if (compiler_thread) {
707 thread = new CompilerThread(queue, counters);
708 } else {
709 thread = new CodeCacheSweeperThread();
710 }
711 // At this point the new CompilerThread data-races with this startup
712 // thread (which I believe is the primoridal thread and NOT the VM
713 // thread). This means Java bytecodes being executed at startup can
714 // queue compile jobs which will run at whatever default priority the
715 // newly created CompilerThread runs at.
716
717
718 // At this point it may be possible that no osthread was created for the
719 // JavaThread due to lack of memory. We would have to throw an exception
720 // in that case. However, since this must work and we do not allow
721 // exceptions anyway, check and abort if this fails.
722
723 if (thread == NULL || thread->osthread() == NULL) {
724 vm_exit_during_initialization("java.lang.OutOfMemoryError",
725 os::native_thread_creation_failed_msg());
726 }
727
728 java_lang_Thread::set_thread(thread_oop(), thread);
729
730 // Note that this only sets the JavaThread _priority field, which by
731 // definition is limited to Java priorities and not OS priorities.
732 // The os-priority is set in the CompilerThread startup code itself
733
734 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
735
736 // Note that we cannot call os::set_priority because it expects Java
737 // priorities and we are *explicitly* using OS priorities so that it's
738 // possible to set the compiler thread priority higher than any Java
739 // thread.
740
741 int native_prio = CompilerThreadPriority;
742 if (native_prio == -1) {
743 if (UseCriticalCompilerThreadPriority) {
744 native_prio = os::java_to_os_priority[CriticalPriority];
745 } else {
746 native_prio = os::java_to_os_priority[NearMaxPriority];
747 }
748 }
749 os::set_native_priority(thread, native_prio);
750
751 java_lang_Thread::set_daemon(thread_oop());
752
753 thread->set_threadObj(thread_oop());
754 if (compiler_thread) {
755 thread->as_CompilerThread()->set_compiler(comp);
756 }
757 Threads::add(thread);
758 Thread::start(thread);
759 }
760
761 // Let go of Threads_lock before yielding
762 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
763
764 return thread;
765 }
766
767
768 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
769 EXCEPTION_MARK;
770 #if !defined(ZERO) && !defined(SHARK)
771 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
772 #endif // !ZERO && !SHARK
773 // Initialize the compilation queue
774 if (c2_compiler_count > 0) {
775 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
776 _c2_compile_queue = new CompileQueue(name);
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 CompileTask::CompileReason compile_reason,
841 bool blocking,
842 Thread* thread) {
843 guarantee(!method->is_abstract(), "cannot compile abstract methods");
844 assert(method->method_holder()->is_instance_klass(),
845 "sanity check");
846 assert(!method->method_holder()->is_not_initialized(),
847 "method holder must be initialized");
848 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
849
850 if (CIPrintRequests) {
851 tty->print("request: ");
852 method->print_short_name(tty);
853 if (osr_bci != InvocationEntryBci) {
854 tty->print(" osr_bci: %d", osr_bci);
855 }
856 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
857 if (!hot_method.is_null()) {
858 tty->print(" hot: ");
859 if (hot_method() != method()) {
860 hot_method->print_short_name(tty);
861 } else {
862 tty->print("yes");
863 }
864 }
865 tty->cr();
866 }
867
868 // A request has been made for compilation. Before we do any
869 // real work, check to see if the method has been compiled
870 // in the meantime with a definitive result.
871 if (compilation_is_complete(method, osr_bci, comp_level)) {
872 return;
873 }
874
875 #ifndef PRODUCT
876 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
877 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
878 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
879 return;
880 }
881 }
882 #endif
883
884 // If this method is already in the compile queue, then
885 // we do not block the current thread.
886 if (compilation_is_in_queue(method)) {
887 // We may want to decay our counter a bit here to prevent
888 // multiple denied requests for compilation. This is an
889 // open compilation policy issue. Note: The other possibility,
890 // in the case that this is a blocking compile request, is to have
891 // all subsequent blocking requesters wait for completion of
892 // ongoing compiles. Note that in this case we'll need a protocol
893 // for freeing the associated compile tasks. [Or we could have
894 // a single static monitor on which all these waiters sleep.]
895 return;
896 }
897
898 if (TieredCompilation) {
899 // Tiered policy requires MethodCounters to exist before adding a method to
900 // the queue. Create if we don't have them yet.
901 method->get_method_counters(thread);
902 }
903
904 // Outputs from the following MutexLocker block:
905 CompileTask* task = NULL;
906 CompileQueue* queue = compile_queue(comp_level);
907
908 // Acquire our lock.
909 {
910 MutexLocker locker(MethodCompileQueue_lock, thread);
911
912 // Make sure the method has not slipped into the queues since
913 // last we checked; note that those checks were "fast bail-outs".
914 // Here we need to be more careful, see 14012000 below.
915 if (compilation_is_in_queue(method)) {
916 return;
917 }
918
919 // We need to check again to see if the compilation has
920 // completed. A previous compilation may have registered
921 // some result.
922 if (compilation_is_complete(method, osr_bci, comp_level)) {
923 return;
924 }
925
926 // We now know that this compilation is not pending, complete,
927 // or prohibited. Assign a compile_id to this compilation
928 // and check to see if it is in our [Start..Stop) range.
929 int compile_id = assign_compile_id(method, osr_bci);
930 if (compile_id == 0) {
931 // The compilation falls outside the allowed range.
932 return;
933 }
934
935 #if INCLUDE_JVMCI
936 if (UseJVMCICompiler) {
937 if (blocking) {
938 // Don't allow blocking compiles for requests triggered by JVMCI.
939 if (thread->is_Compiler_thread()) {
940 blocking = false;
941 }
942
943 // Don't allow blocking compiles if inside a class initializer or while performing class loading
944 vframeStream vfst((JavaThread*) thread);
945 for (; !vfst.at_end(); vfst.next()) {
946 if (vfst.method()->is_static_initializer() ||
947 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
948 vfst.method()->name() == vmSymbols::loadClass_name())) {
949 blocking = false;
950 break;
951 }
952 }
953
954 // Don't allow blocking compilation requests to JVMCI
955 // if JVMCI itself is not yet initialized
956 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
957 blocking = false;
958 }
959
960 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
961 // to avoid deadlock between compiler thread(s) and threads run at shutdown
962 // such as the DestroyJavaVM thread.
963 if (JVMCIRuntime::shutdown_called()) {
964 blocking = false;
965 }
966 }
967 }
968 #endif // INCLUDE_JVMCI
969
970 // We will enter the compilation in the queue.
971 // 14012000: Note that this sets the queued_for_compile bits in
972 // the target method. We can now reason that a method cannot be
973 // queued for compilation more than once, as follows:
974 // Before a thread queues a task for compilation, it first acquires
975 // the compile queue lock, then checks if the method's queued bits
976 // are set or it has already been compiled. Thus there can not be two
977 // instances of a compilation task for the same method on the
978 // compilation queue. Consider now the case where the compilation
979 // thread has already removed a task for that method from the queue
980 // and is in the midst of compiling it. In this case, the
981 // queued_for_compile bits must be set in the method (and these
982 // will be visible to the current thread, since the bits were set
983 // under protection of the compile queue lock, which we hold now.
984 // When the compilation completes, the compiler thread first sets
985 // the compilation result and then clears the queued_for_compile
986 // bits. Neither of these actions are protected by a barrier (or done
987 // under the protection of a lock), so the only guarantee we have
988 // (on machines with TSO (Total Store Order)) is that these values
989 // will update in that order. As a result, the only combinations of
990 // these bits that the current thread will see are, in temporal order:
991 // <RESULT, QUEUE> :
992 // <0, 1> : in compile queue, but not yet compiled
993 // <1, 1> : compiled but queue bit not cleared
994 // <1, 0> : compiled and queue bit cleared
995 // Because we first check the queue bits then check the result bits,
996 // we are assured that we cannot introduce a duplicate task.
997 // Note that if we did the tests in the reverse order (i.e. check
998 // result then check queued bit), we could get the result bit before
999 // the compilation completed, and the queue bit after the compilation
1000 // completed, and end up introducing a "duplicate" (redundant) task.
1001 // In that case, the compiler thread should first check if a method
1002 // has already been compiled before trying to compile it.
1003 // NOTE: in the event that there are multiple compiler threads and
1004 // there is de-optimization/recompilation, things will get hairy,
1005 // and in that case it's best to protect both the testing (here) of
1006 // these bits, and their updating (here and elsewhere) under a
1007 // common lock.
1008 task = create_compile_task(queue,
1009 compile_id, method,
1010 osr_bci, comp_level,
1011 hot_method, hot_count, compile_reason,
1012 blocking);
1013 }
1014
1015 if (blocking) {
1016 wait_for_completion(task);
1017 }
1018 }
1019
1020 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1021 int comp_level,
1022 const methodHandle& hot_method, int hot_count,
1023 CompileTask::CompileReason compile_reason,
1024 Thread* THREAD) {
1025 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1026 if (!_initialized || comp_level == CompLevel_none) {
1027 return NULL;
1028 }
1029
1030 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1031 assert(comp != NULL, "Ensure we have a compiler");
1032
1033 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1034 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1035 DirectivesStack::release(directive);
1036 return nm;
1037 }
1038
1039 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1040 int comp_level,
1041 const methodHandle& hot_method, int hot_count,
1042 CompileTask::CompileReason compile_reason,
1043 DirectiveSet* directive,
1044 Thread* THREAD) {
1045
1046 // make sure arguments make sense
1047 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1048 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1049 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1050 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1051 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1052 // allow any levels for WhiteBox
1053 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1054 // return quickly if possible
1055
1056 // lock, make sure that the compilation
1057 // isn't prohibited in a straightforward way.
1058 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1059 if (comp == NULL || !comp->can_compile_method(method) ||
1060 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1061 return NULL;
1062 }
1063
1064 #if INCLUDE_JVMCI
1065 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1066 return NULL;
1067 }
1068 #endif
1069
1070 if (osr_bci == InvocationEntryBci) {
1071 // standard compilation
1072 CompiledMethod* method_code = method->code();
1073 if (method_code != NULL && method_code->is_nmethod()) {
1074 if (compilation_is_complete(method, osr_bci, comp_level)) {
1075 return (nmethod*) method_code;
1076 }
1077 }
1078 if (method->is_not_compilable(comp_level)) {
1079 return NULL;
1080 }
1081 } else {
1082 // osr compilation
1083 #ifndef TIERED
1084 // seems like an assert of dubious value
1085 assert(comp_level == CompLevel_highest_tier,
1086 "all OSR compiles are assumed to be at a single compilation level");
1087 #endif // TIERED
1088 // We accept a higher level osr method
1089 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1090 if (nm != NULL) return nm;
1091 if (method->is_not_osr_compilable(comp_level)) return NULL;
1092 }
1093
1094 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1095 // some prerequisites that are compiler specific
1096 if (comp->is_c2() || comp->is_shark()) {
1097 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1098 // Resolve all classes seen in the signature of the method
1099 // we are compiling.
1100 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1101 }
1102
1103 // If the method is native, do the lookup in the thread requesting
1104 // the compilation. Native lookups can load code, which is not
1105 // permitted during compilation.
1106 //
1107 // Note: A native method implies non-osr compilation which is
1108 // checked with an assertion at the entry of this method.
1109 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1110 bool in_base_library;
1111 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1112 if (HAS_PENDING_EXCEPTION) {
1113 // In case of an exception looking up the method, we just forget
1114 // about it. The interpreter will kick-in and throw the exception.
1115 method->set_not_compilable(); // implies is_not_osr_compilable()
1116 CLEAR_PENDING_EXCEPTION;
1117 return NULL;
1118 }
1119 assert(method->has_native_function(), "must have native code by now");
1120 }
1121
1122 // RedefineClasses() has replaced this method; just return
1123 if (method->is_old()) {
1124 return NULL;
1125 }
1126
1127 // JVMTI -- post_compile_event requires jmethod_id() that may require
1128 // a lock the compiling thread can not acquire. Prefetch it here.
1129 if (JvmtiExport::should_post_compiled_method_load()) {
1130 method->jmethod_id();
1131 }
1132
1133 // do the compilation
1134 if (method->is_native()) {
1135 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1136 // The following native methods:
1137 //
1138 // java.lang.Float.intBitsToFloat
1139 // java.lang.Float.floatToRawIntBits
1140 // java.lang.Double.longBitsToDouble
1141 // java.lang.Double.doubleToRawLongBits
1142 //
1143 // are called through the interpreter even if interpreter native stubs
1144 // are not preferred (i.e., calling through adapter handlers is preferred).
1145 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1146 // if the version of the methods from the native libraries is called.
1147 // As the interpreter and the C2-intrinsified version of the methods preserves
1148 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1149 if ((UseSSE >= 1 &&
1150 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1151 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1152 (UseSSE >= 2 &&
1153 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1154 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1155 return NULL;
1156 }
1157
1158 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1159 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1160 //
1161 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1162 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1163 AdapterHandlerLibrary::create_native_wrapper(method);
1164 } else {
1165 return NULL;
1166 }
1167 } else {
1168 // If the compiler is shut off due to code cache getting full
1169 // fail out now so blocking compiles dont hang the java thread
1170 if (!should_compile_new_jobs()) {
1171 CompilationPolicy::policy()->delay_compilation(method());
1172 return NULL;
1173 }
1174 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1175 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1176 }
1177
1178 // return requested nmethod
1179 // We accept a higher level osr method
1180 if (osr_bci == InvocationEntryBci) {
1181 CompiledMethod* code = method->code();
1182 if (code == NULL) {
1183 return (nmethod*) code;
1184 } else {
1185 return code->as_nmethod_or_null();
1186 }
1187 }
1188 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1189 }
1190
1191
1192 // ------------------------------------------------------------------
1193 // CompileBroker::compilation_is_complete
1194 //
1195 // See if compilation of this method is already complete.
1196 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1197 int osr_bci,
1198 int comp_level) {
1199 bool is_osr = (osr_bci != standard_entry_bci);
1200 if (is_osr) {
1201 if (method->is_not_osr_compilable(comp_level)) {
1202 return true;
1203 } else {
1204 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1205 return (result != NULL);
1206 }
1207 } else {
1208 if (method->is_not_compilable(comp_level)) {
1209 return true;
1210 } else {
1211 CompiledMethod* result = method->code();
1212 if (result == NULL) return false;
1213 return comp_level == result->comp_level();
1214 }
1215 }
1216 }
1217
1218
1219 /**
1220 * See if this compilation is already requested.
1221 *
1222 * Implementation note: there is only a single "is in queue" bit
1223 * for each method. This means that the check below is overly
1224 * conservative in the sense that an osr compilation in the queue
1225 * will block a normal compilation from entering the queue (and vice
1226 * versa). This can be remedied by a full queue search to disambiguate
1227 * cases. If it is deemed profitable, this may be done.
1228 */
1229 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1230 return method->queued_for_compilation();
1231 }
1232
1233 // ------------------------------------------------------------------
1234 // CompileBroker::compilation_is_prohibited
1235 //
1236 // See if this compilation is not allowed.
1237 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1238 bool is_native = method->is_native();
1239 // Some compilers may not support the compilation of natives.
1240 AbstractCompiler *comp = compiler(comp_level);
1241 if (is_native &&
1242 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1243 method->set_not_compilable_quietly(comp_level);
1244 return true;
1245 }
1246
1247 bool is_osr = (osr_bci != standard_entry_bci);
1248 // Some compilers may not support on stack replacement.
1249 if (is_osr &&
1250 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1251 method->set_not_osr_compilable(comp_level);
1252 return true;
1253 }
1254
1255 // The method may be explicitly excluded by the user.
1256 double scale;
1257 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1258 bool quietly = CompilerOracle::should_exclude_quietly();
1259 if (PrintCompilation && !quietly) {
1260 // This does not happen quietly...
1261 ResourceMark rm;
1262 tty->print("### Excluding %s:%s",
1263 method->is_native() ? "generation of native wrapper" : "compile",
1264 (method->is_static() ? " static" : ""));
1265 method->print_short_name(tty);
1266 tty->cr();
1267 }
1268 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1269 }
1270
1271 return false;
1272 }
1273
1274 /**
1275 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1276 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1277 * The function also allows to generate separate compilation IDs for OSR compilations.
1278 */
1279 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1280 #ifdef ASSERT
1281 bool is_osr = (osr_bci != standard_entry_bci);
1282 int id;
1283 if (method->is_native()) {
1284 assert(!is_osr, "can't be osr");
1285 // Adapters, native wrappers and method handle intrinsics
1286 // should be generated always.
1287 return Atomic::add(1, &_compilation_id);
1288 } else if (CICountOSR && is_osr) {
1289 id = Atomic::add(1, &_osr_compilation_id);
1290 if (CIStartOSR <= id && id < CIStopOSR) {
1291 return id;
1292 }
1293 } else {
1294 id = Atomic::add(1, &_compilation_id);
1295 if (CIStart <= id && id < CIStop) {
1296 return id;
1297 }
1298 }
1299
1300 // Method was not in the appropriate compilation range.
1301 method->set_not_compilable_quietly();
1302 return 0;
1303 #else
1304 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1305 // only _compilation_id is incremented.
1306 return Atomic::add(1, &_compilation_id);
1307 #endif
1308 }
1309
1310 // ------------------------------------------------------------------
1311 // CompileBroker::assign_compile_id_unlocked
1312 //
1313 // Public wrapper for assign_compile_id that acquires the needed locks
1314 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1315 MutexLocker locker(MethodCompileQueue_lock, thread);
1316 return assign_compile_id(method, osr_bci);
1317 }
1318
1319 // ------------------------------------------------------------------
1320 // CompileBroker::preload_classes
1321 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1322 // Move this code over from c1_Compiler.cpp
1323 ShouldNotReachHere();
1324 }
1325
1326
1327 // ------------------------------------------------------------------
1328 // CompileBroker::create_compile_task
1329 //
1330 // Create a CompileTask object representing the current request for
1331 // compilation. Add this task to the queue.
1332 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1333 int compile_id,
1334 const methodHandle& method,
1335 int osr_bci,
1336 int comp_level,
1337 const methodHandle& hot_method,
1338 int hot_count,
1339 CompileTask::CompileReason compile_reason,
1340 bool blocking) {
1341 CompileTask* new_task = CompileTask::allocate();
1342 new_task->initialize(compile_id, method, osr_bci, comp_level,
1343 hot_method, hot_count, compile_reason,
1344 blocking);
1345 queue->add(new_task);
1346 return new_task;
1347 }
1348
1349 #if INCLUDE_JVMCI
1350 // The number of milliseconds to wait before checking if
1351 // JVMCI compilation has made progress.
1352 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500;
1353
1354 // The number of JVMCI compilation progress checks that must fail
1355 // before unblocking a thread waiting for a blocking compilation.
1356 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5;
1357
1358 /**
1359 * Waits for a JVMCI compiler to complete a given task. This thread
1360 * waits until either the task completes or it sees no JVMCI compilation
1361 * progress for N consecutive milliseconds where N is
1362 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1363 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1364 *
1365 * @return true if this thread needs to free/recycle the task
1366 */
1367 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1368 MutexLocker waiter(task->lock(), thread);
1369 int progress_wait_attempts = 0;
1370 int methods_compiled = jvmci->methods_compiled();
1371 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1372 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1373 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1374
1375 bool progress;
1376 if (jvmci_compiler_thread != NULL) {
1377 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1378 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1379 } else {
1380 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1381 // that all JVMCI compiler threads are blocked on. We use the counter for
1382 // successful JVMCI compilations to determine whether JVMCI compilation
1383 // is still making progress through the JVMCI compiler queue.
1384 progress = jvmci->methods_compiled() != methods_compiled;
1385 }
1386
1387 if (!progress) {
1388 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1389 if (PrintCompilation) {
1390 task->print(tty, "wait for blocking compilation timed out");
1391 }
1392 break;
1393 }
1394 } else {
1395 progress_wait_attempts = 0;
1396 if (jvmci_compiler_thread == NULL) {
1397 methods_compiled = jvmci->methods_compiled();
1398 }
1399 }
1400 }
1401 task->clear_waiter();
1402 return task->is_complete();
1403 }
1404 #endif
1405
1406 /**
1407 * Wait for the compilation task to complete.
1408 */
1409 void CompileBroker::wait_for_completion(CompileTask* task) {
1410 if (CIPrintCompileQueue) {
1411 ttyLocker ttyl;
1412 tty->print_cr("BLOCKING FOR COMPILE");
1413 }
1414
1415 assert(task->is_blocking(), "can only wait on blocking task");
1416
1417 JavaThread* thread = JavaThread::current();
1418 thread->set_blocked_on_compilation(true);
1419
1420 methodHandle method(thread, task->method());
1421 bool free_task;
1422 #if INCLUDE_JVMCI
1423 AbstractCompiler* comp = compiler(task->comp_level());
1424 if (comp->is_jvmci()) {
1425 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1426 } else
1427 #endif
1428 {
1429 MutexLocker waiter(task->lock(), thread);
1430 free_task = true;
1431 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1432 task->lock()->wait();
1433 }
1434 }
1435
1436 thread->set_blocked_on_compilation(false);
1437 if (free_task) {
1438 if (is_compilation_disabled_forever()) {
1439 CompileTask::free(task);
1440 return;
1441 }
1442
1443 // It is harmless to check this status without the lock, because
1444 // completion is a stable property (until the task object is recycled).
1445 assert(task->is_complete(), "Compilation should have completed");
1446 assert(task->code_handle() == NULL, "must be reset");
1447
1448 // By convention, the waiter is responsible for recycling a
1449 // blocking CompileTask. Since there is only one waiter ever
1450 // waiting on a CompileTask, we know that no one else will
1451 // be using this CompileTask; we can free it.
1452 CompileTask::free(task);
1453 }
1454 }
1455
1456 /**
1457 * Initialize compiler thread(s) + compiler object(s). The postcondition
1458 * of this function is that the compiler runtimes are initialized and that
1459 * compiler threads can start compiling.
1460 */
1461 bool CompileBroker::init_compiler_runtime() {
1462 CompilerThread* thread = CompilerThread::current();
1463 AbstractCompiler* comp = thread->compiler();
1464 // Final sanity check - the compiler object must exist
1465 guarantee(comp != NULL, "Compiler object must exist");
1466
1467 int system_dictionary_modification_counter;
1468 {
1469 MutexLocker locker(Compile_lock, thread);
1470 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1471 }
1472
1473 {
1474 // Must switch to native to allocate ci_env
1475 ThreadToNativeFromVM ttn(thread);
1476 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1477 // Cache Jvmti state
1478 ci_env.cache_jvmti_state();
1479 // Cache DTrace flags
1480 ci_env.cache_dtrace_flags();
1481
1482 // Switch back to VM state to do compiler initialization
1483 ThreadInVMfromNative tv(thread);
1484 ResetNoHandleMark rnhm;
1485
1486 if (!comp->is_shark()) {
1487 // Perform per-thread and global initializations
1488 comp->initialize();
1489 }
1490 }
1491
1492 if (comp->is_failed()) {
1493 disable_compilation_forever();
1494 // If compiler initialization failed, no compiler thread that is specific to a
1495 // particular compiler runtime will ever start to compile methods.
1496 shutdown_compiler_runtime(comp, thread);
1497 return false;
1498 }
1499
1500 // C1 specific check
1501 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1502 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1503 return false;
1504 }
1505
1506 return true;
1507 }
1508
1509 /**
1510 * If C1 and/or C2 initialization failed, we shut down all compilation.
1511 * We do this to keep things simple. This can be changed if it ever turns
1512 * out to be a problem.
1513 */
1514 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1515 // Free buffer blob, if allocated
1516 if (thread->get_buffer_blob() != NULL) {
1517 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1518 CodeCache::free(thread->get_buffer_blob());
1519 }
1520
1521 if (comp->should_perform_shutdown()) {
1522 // There are two reasons for shutting down the compiler
1523 // 1) compiler runtime initialization failed
1524 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1525 warning("%s initialization failed. Shutting down all compilers", comp->name());
1526
1527 // Only one thread per compiler runtime object enters here
1528 // Set state to shut down
1529 comp->set_shut_down();
1530
1531 // Delete all queued compilation tasks to make compiler threads exit faster.
1532 if (_c1_compile_queue != NULL) {
1533 _c1_compile_queue->free_all();
1534 }
1535
1536 if (_c2_compile_queue != NULL) {
1537 _c2_compile_queue->free_all();
1538 }
1539
1540 // Set flags so that we continue execution with using interpreter only.
1541 UseCompiler = false;
1542 UseInterpreter = true;
1543
1544 // We could delete compiler runtimes also. However, there are references to
1545 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1546 // fail. This can be done later if necessary.
1547 }
1548 }
1549
1550 // ------------------------------------------------------------------
1551 // CompileBroker::compiler_thread_loop
1552 //
1553 // The main loop run by a CompilerThread.
1554 void CompileBroker::compiler_thread_loop() {
1555 CompilerThread* thread = CompilerThread::current();
1556 CompileQueue* queue = thread->queue();
1557 // For the thread that initializes the ciObjectFactory
1558 // this resource mark holds all the shared objects
1559 ResourceMark rm;
1560
1561 // First thread to get here will initialize the compiler interface
1562
1563 if (!ciObjectFactory::is_initialized()) {
1564 ASSERT_IN_VM;
1565 MutexLocker only_one (CompileThread_lock, thread);
1566 if (!ciObjectFactory::is_initialized()) {
1567 ciObjectFactory::initialize();
1568 }
1569 }
1570
1571 // Open a log.
1572 if (LogCompilation) {
1573 init_compiler_thread_log();
1574 }
1575 CompileLog* log = thread->log();
1576 if (log != NULL) {
1577 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1578 thread->name(),
1579 os::current_thread_id(),
1580 os::current_process_id());
1581 log->stamp();
1582 log->end_elem();
1583 }
1584
1585 // If compiler thread/runtime initialization fails, exit the compiler thread
1586 if (!init_compiler_runtime()) {
1587 return;
1588 }
1589
1590 // Poll for new compilation tasks as long as the JVM runs. Compilation
1591 // should only be disabled if something went wrong while initializing the
1592 // compiler runtimes. This, in turn, should not happen. The only known case
1593 // when compiler runtime initialization fails is if there is not enough free
1594 // space in the code cache to generate the necessary stubs, etc.
1595 while (!is_compilation_disabled_forever()) {
1596 // We need this HandleMark to avoid leaking VM handles.
1597 HandleMark hm(thread);
1598
1599 CompileTask* task = queue->get();
1600 if (task == NULL) {
1601 continue;
1602 }
1603
1604 // Give compiler threads an extra quanta. They tend to be bursty and
1605 // this helps the compiler to finish up the job.
1606 if (CompilerThreadHintNoPreempt) {
1607 os::hint_no_preempt();
1608 }
1609
1610 // Assign the task to the current thread. Mark this compilation
1611 // thread as active for the profiler.
1612 CompileTaskWrapper ctw(task);
1613 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1614 task->set_code_handle(&result_handle);
1615 methodHandle method(thread, task->method());
1616
1617 // Never compile a method if breakpoints are present in it
1618 if (method()->number_of_breakpoints() == 0) {
1619 // Compile the method.
1620 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1621 invoke_compiler_on_method(task);
1622 } else {
1623 // After compilation is disabled, remove remaining methods from queue
1624 method->clear_queued_for_compilation();
1625 task->set_failure_reason("compilation is disabled");
1626 }
1627 }
1628 }
1629
1630 // Shut down compiler runtime
1631 shutdown_compiler_runtime(thread->compiler(), thread);
1632 }
1633
1634 // ------------------------------------------------------------------
1635 // CompileBroker::init_compiler_thread_log
1636 //
1637 // Set up state required by +LogCompilation.
1638 void CompileBroker::init_compiler_thread_log() {
1639 CompilerThread* thread = CompilerThread::current();
1640 char file_name[4*K];
1641 FILE* fp = NULL;
1642 intx thread_id = os::current_thread_id();
1643 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1644 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1645 if (dir == NULL) {
1646 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1647 thread_id, os::current_process_id());
1648 } else {
1649 jio_snprintf(file_name, sizeof(file_name),
1650 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1651 os::file_separator(), thread_id, os::current_process_id());
1652 }
1653
1654 fp = fopen(file_name, "wt");
1655 if (fp != NULL) {
1656 if (LogCompilation && Verbose) {
1657 tty->print_cr("Opening compilation log %s", file_name);
1658 }
1659 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1660 if (log == NULL) {
1661 fclose(fp);
1662 return;
1663 }
1664 thread->init_log(log);
1665
1666 if (xtty != NULL) {
1667 ttyLocker ttyl;
1668 // Record any per thread log files
1669 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1670 }
1671 return;
1672 }
1673 }
1674 warning("Cannot open log file: %s", file_name);
1675 }
1676
1677 void CompileBroker::log_metaspace_failure() {
1678 const char* message = "some methods may not be compiled because metaspace "
1679 "is out of memory";
1680 if (_compilation_log != NULL) {
1681 _compilation_log->log_metaspace_failure(message);
1682 }
1683 if (PrintCompilation) {
1684 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1685 }
1686 }
1687
1688
1689 // ------------------------------------------------------------------
1690 // CompileBroker::set_should_block
1691 //
1692 // Set _should_block.
1693 // Call this from the VM, with Threads_lock held and a safepoint requested.
1694 void CompileBroker::set_should_block() {
1695 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1696 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1697 #ifndef PRODUCT
1698 if (PrintCompilation && (Verbose || WizardMode))
1699 tty->print_cr("notifying compiler thread pool to block");
1700 #endif
1701 _should_block = true;
1702 }
1703
1704 // ------------------------------------------------------------------
1705 // CompileBroker::maybe_block
1706 //
1707 // Call this from the compiler at convenient points, to poll for _should_block.
1708 void CompileBroker::maybe_block() {
1709 if (_should_block) {
1710 #ifndef PRODUCT
1711 if (PrintCompilation && (Verbose || WizardMode))
1712 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1713 #endif
1714 ThreadInVMfromNative tivfn(JavaThread::current());
1715 }
1716 }
1717
1718 // wrapper for CodeCache::print_summary()
1719 static void codecache_print(bool detailed)
1720 {
1721 ResourceMark rm;
1722 stringStream s;
1723 // Dump code cache into a buffer before locking the tty,
1724 {
1725 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1726 CodeCache::print_summary(&s, detailed);
1727 }
1728 ttyLocker ttyl;
1729 tty->print("%s", s.as_string());
1730 }
1731
1732 // wrapper for CodeCache::print_summary() using outputStream
1733 static void codecache_print(outputStream* out, bool detailed) {
1734 ResourceMark rm;
1735 stringStream s;
1736
1737 // Dump code cache into a buffer
1738 {
1739 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1740 CodeCache::print_summary(&s, detailed);
1741 }
1742
1743 char* remaining_log = s.as_string();
1744 while (*remaining_log != '\0') {
1745 char* eol = strchr(remaining_log, '\n');
1746 if (eol == NULL) {
1747 out->print_cr("%s", remaining_log);
1748 remaining_log = remaining_log + strlen(remaining_log);
1749 } else {
1750 *eol = '\0';
1751 out->print_cr("%s", remaining_log);
1752 remaining_log = eol + 1;
1753 }
1754 }
1755 }
1756
1757 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1758
1759 if (success) {
1760 task->mark_success();
1761 if (ci_env != NULL) {
1762 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1763 }
1764 if (_compilation_log != NULL) {
1765 nmethod* code = task->code();
1766 if (code != NULL) {
1767 _compilation_log->log_nmethod(thread, code);
1768 }
1769 }
1770 }
1771
1772 // simulate crash during compilation
1773 assert(task->compile_id() != CICrashAt, "just as planned");
1774 if (event.should_commit()) {
1775 event.set_method(task->method());
1776 event.set_compileId(task->compile_id());
1777 event.set_compileLevel(task->comp_level());
1778 event.set_succeded(task->is_success());
1779 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1780 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1781 event.set_inlinedBytes(task->num_inlined_bytecodes());
1782 event.commit();
1783 }
1784 }
1785
1786 int DirectivesStack::_depth = 0;
1787 CompilerDirectives* DirectivesStack::_top = NULL;
1788 CompilerDirectives* DirectivesStack::_bottom = NULL;
1789
1790 // ------------------------------------------------------------------
1791 // CompileBroker::invoke_compiler_on_method
1792 //
1793 // Compile a method.
1794 //
1795 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1796 task->print_ul();
1797 if (PrintCompilation) {
1798 ResourceMark rm;
1799 task->print_tty();
1800 }
1801 elapsedTimer time;
1802
1803 CompilerThread* thread = CompilerThread::current();
1804 ResourceMark rm(thread);
1805
1806 if (LogEvents) {
1807 _compilation_log->log_compile(thread, task);
1808 }
1809
1810 // Common flags.
1811 uint compile_id = task->compile_id();
1812 int osr_bci = task->osr_bci();
1813 bool is_osr = (osr_bci != standard_entry_bci);
1814 bool should_log = (thread->log() != NULL);
1815 bool should_break = false;
1816 const int task_level = task->comp_level();
1817 AbstractCompiler* comp = task->compiler();
1818
1819 DirectiveSet* directive;
1820 {
1821 // create the handle inside it's own block so it can't
1822 // accidentally be referenced once the thread transitions to
1823 // native. The NoHandleMark before the transition should catch
1824 // any cases where this occurs in the future.
1825 methodHandle method(thread, task->method());
1826 assert(!method->is_native(), "no longer compile natives");
1827
1828 // Look up matching directives
1829 directive = DirectivesStack::getMatchingDirective(method, comp);
1830
1831 // Save information about this method in case of failure.
1832 set_last_compile(thread, method, is_osr, task_level);
1833
1834 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1835 }
1836
1837 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1838 if (should_log && !directive->LogOption) {
1839 should_log = false;
1840 }
1841
1842 // Allocate a new set of JNI handles.
1843 push_jni_handle_block();
1844 Method* target_handle = task->method();
1845 int compilable = ciEnv::MethodCompilable;
1846 const char* failure_reason = NULL;
1847 const char* retry_message = NULL;
1848
1849 int system_dictionary_modification_counter;
1850 {
1851 MutexLocker locker(Compile_lock, thread);
1852 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1853 }
1854
1855 #if INCLUDE_JVMCI
1856 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1857 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1858
1859 TraceTime t1("compilation", &time);
1860 EventCompilation event;
1861
1862 JVMCIEnv env(task, system_dictionary_modification_counter);
1863 methodHandle method(thread, target_handle);
1864 jvmci->compile_method(method, osr_bci, &env);
1865
1866 post_compile(thread, task, event, task->code() != NULL, NULL);
1867
1868 failure_reason = env.failure_reason();
1869 if (!env.retryable()) {
1870 retry_message = "not retryable";
1871 compilable = ciEnv::MethodCompilable_not_at_tier;
1872 }
1873
1874 } else
1875 #endif // INCLUDE_JVMCI
1876 {
1877 NoHandleMark nhm;
1878 ThreadToNativeFromVM ttn(thread);
1879
1880 ciEnv ci_env(task, system_dictionary_modification_counter);
1881 if (should_break) {
1882 ci_env.set_break_at_compile(true);
1883 }
1884 if (should_log) {
1885 ci_env.set_log(thread->log());
1886 }
1887 assert(thread->env() == &ci_env, "set by ci_env");
1888 // The thread-env() field is cleared in ~CompileTaskWrapper.
1889
1890 // Cache Jvmti state
1891 ci_env.cache_jvmti_state();
1892
1893 // Cache DTrace flags
1894 ci_env.cache_dtrace_flags();
1895
1896 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1897
1898 TraceTime t1("compilation", &time);
1899 EventCompilation event;
1900
1901 if (comp == NULL) {
1902 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1903 } else {
1904 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1905 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1906 while (WhiteBox::compilation_locked) {
1907 locker.wait(Mutex::_no_safepoint_check_flag);
1908 }
1909 }
1910 comp->compile_method(&ci_env, target, osr_bci, directive);
1911 }
1912
1913 if (!ci_env.failing() && task->code() == NULL) {
1914 //assert(false, "compiler should always document failure");
1915 // The compiler elected, without comment, not to register a result.
1916 // Do not attempt further compilations of this method.
1917 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1918 }
1919
1920 // Copy this bit to the enclosing block:
1921 compilable = ci_env.compilable();
1922
1923 if (ci_env.failing()) {
1924 failure_reason = ci_env.failure_reason();
1925 retry_message = ci_env.retry_message();
1926 ci_env.report_failure(failure_reason);
1927 }
1928
1929 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1930 }
1931 // Remove the JNI handle block after the ciEnv destructor has run in
1932 // the previous block.
1933 pop_jni_handle_block();
1934
1935 if (failure_reason != NULL) {
1936 task->set_failure_reason(failure_reason);
1937 if (_compilation_log != NULL) {
1938 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1939 }
1940 if (PrintCompilation) {
1941 FormatBufferResource msg = retry_message != NULL ?
1942 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1943 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1944 task->print(tty, msg);
1945 }
1946 }
1947
1948 methodHandle method(thread, task->method());
1949
1950 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1951
1952 collect_statistics(thread, time, task);
1953
1954 nmethod* nm = task->code();
1955 if (nm != NULL) {
1956 nm->maybe_print_nmethod(directive);
1957 }
1958 DirectivesStack::release(directive);
1959
1960 if (PrintCompilation && PrintCompilation2) {
1961 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1962 tty->print("%4d ", compile_id); // print compilation number
1963 tty->print("%s ", (is_osr ? "%" : " "));
1964 if (task->code() != NULL) {
1965 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1966 }
1967 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1968 }
1969
1970 Log(compilation, codecache) log;
1971 if (log.is_debug()) {
1972 codecache_print(log.debug_stream(), /* detailed= */ false);
1973 }
1974 if (PrintCodeCacheOnCompilation) {
1975 codecache_print(/* detailed= */ false);
1976 }
1977 // Disable compilation, if required.
1978 switch (compilable) {
1979 case ciEnv::MethodCompilable_never:
1980 if (is_osr)
1981 method->set_not_osr_compilable_quietly();
1982 else
1983 method->set_not_compilable_quietly();
1984 break;
1985 case ciEnv::MethodCompilable_not_at_tier:
1986 if (is_osr)
1987 method->set_not_osr_compilable_quietly(task_level);
1988 else
1989 method->set_not_compilable_quietly(task_level);
1990 break;
1991 }
1992
1993 // Note that the queued_for_compilation bits are cleared without
1994 // protection of a mutex. [They were set by the requester thread,
1995 // when adding the task to the compile queue -- at which time the
1996 // compile queue lock was held. Subsequently, we acquired the compile
1997 // queue lock to get this task off the compile queue; thus (to belabour
1998 // the point somewhat) our clearing of the bits must be occurring
1999 // only after the setting of the bits. See also 14012000 above.
2000 method->clear_queued_for_compilation();
2001
2002 #ifdef ASSERT
2003 if (CollectedHeap::fired_fake_oom()) {
2004 // The current compile received a fake OOM during compilation so
2005 // go ahead and exit the VM since the test apparently succeeded
2006 tty->print_cr("*** Shutting down VM after successful fake OOM");
2007 vm_exit(0);
2008 }
2009 #endif
2010 }
2011
2012 /**
2013 * The CodeCache is full. Print warning and disable compilation.
2014 * Schedule code cache cleaning so compilation can continue later.
2015 * This function needs to be called only from CodeCache::allocate(),
2016 * since we currently handle a full code cache uniformly.
2017 */
2018 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2019 UseInterpreter = true;
2020 if (UseCompiler || AlwaysCompileLoopMethods ) {
2021 if (xtty != NULL) {
2022 ResourceMark rm;
2023 stringStream s;
2024 // Dump code cache state into a buffer before locking the tty,
2025 // because log_state() will use locks causing lock conflicts.
2026 CodeCache::log_state(&s);
2027 // Lock to prevent tearing
2028 ttyLocker ttyl;
2029 xtty->begin_elem("code_cache_full");
2030 xtty->print("%s", s.as_string());
2031 xtty->stamp();
2032 xtty->end_elem();
2033 }
2034
2035 #ifndef PRODUCT
2036 if (CompileTheWorld || ExitOnFullCodeCache) {
2037 codecache_print(/* detailed= */ true);
2038 before_exit(JavaThread::current());
2039 exit_globals(); // will delete tty
2040 vm_direct_exit(CompileTheWorld ? 0 : 1);
2041 }
2042 #endif
2043 if (UseCodeCacheFlushing) {
2044 // Since code cache is full, immediately stop new compiles
2045 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2046 NMethodSweeper::log_sweep("disable_compiler");
2047 }
2048 } else {
2049 disable_compilation_forever();
2050 }
2051
2052 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2053 }
2054 }
2055
2056 // ------------------------------------------------------------------
2057 // CompileBroker::set_last_compile
2058 //
2059 // Record this compilation for debugging purposes.
2060 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2061 ResourceMark rm;
2062 char* method_name = method->name()->as_C_string();
2063 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2064 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2065 char current_method[CompilerCounters::cmname_buffer_length];
2066 size_t maxLen = CompilerCounters::cmname_buffer_length;
2067
2068 if (UsePerfData) {
2069 const char* class_name = method->method_holder()->name()->as_C_string();
2070
2071 size_t s1len = strlen(class_name);
2072 size_t s2len = strlen(method_name);
2073
2074 // check if we need to truncate the string
2075 if (s1len + s2len + 2 > maxLen) {
2076
2077 // the strategy is to lop off the leading characters of the
2078 // class name and the trailing characters of the method name.
2079
2080 if (s2len + 2 > maxLen) {
2081 // lop of the entire class name string, let snprintf handle
2082 // truncation of the method name.
2083 class_name += s1len; // null string
2084 }
2085 else {
2086 // lop off the extra characters from the front of the class name
2087 class_name += ((s1len + s2len + 2) - maxLen);
2088 }
2089 }
2090
2091 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2092 }
2093
2094 if (CICountOSR && is_osr) {
2095 _last_compile_type = osr_compile;
2096 } else {
2097 _last_compile_type = normal_compile;
2098 }
2099 _last_compile_level = comp_level;
2100
2101 if (UsePerfData) {
2102 CompilerCounters* counters = thread->counters();
2103 counters->set_current_method(current_method);
2104 counters->set_compile_type((jlong)_last_compile_type);
2105 }
2106 }
2107
2108
2109 // ------------------------------------------------------------------
2110 // CompileBroker::push_jni_handle_block
2111 //
2112 // Push on a new block of JNI handles.
2113 void CompileBroker::push_jni_handle_block() {
2114 JavaThread* thread = JavaThread::current();
2115
2116 // Allocate a new block for JNI handles.
2117 // Inlined code from jni_PushLocalFrame()
2118 JNIHandleBlock* java_handles = thread->active_handles();
2119 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2120 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2121 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2122 thread->set_active_handles(compile_handles);
2123 }
2124
2125
2126 // ------------------------------------------------------------------
2127 // CompileBroker::pop_jni_handle_block
2128 //
2129 // Pop off the current block of JNI handles.
2130 void CompileBroker::pop_jni_handle_block() {
2131 JavaThread* thread = JavaThread::current();
2132
2133 // Release our JNI handle block
2134 JNIHandleBlock* compile_handles = thread->active_handles();
2135 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2136 thread->set_active_handles(java_handles);
2137 compile_handles->set_pop_frame_link(NULL);
2138 JNIHandleBlock::release_block(compile_handles, thread); // may block
2139 }
2140
2141 // ------------------------------------------------------------------
2142 // CompileBroker::collect_statistics
2143 //
2144 // Collect statistics about the compilation.
2145
2146 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2147 bool success = task->is_success();
2148 methodHandle method (thread, task->method());
2149 uint compile_id = task->compile_id();
2150 bool is_osr = (task->osr_bci() != standard_entry_bci);
2151 nmethod* code = task->code();
2152 CompilerCounters* counters = thread->counters();
2153
2154 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2155 MutexLocker locker(CompileStatistics_lock);
2156
2157 // _perf variables are production performance counters which are
2158 // updated regardless of the setting of the CITime and CITimeEach flags
2159 //
2160
2161 // account all time, including bailouts and failures in this counter;
2162 // C1 and C2 counters are counting both successful and unsuccessful compiles
2163 _t_total_compilation.add(time);
2164
2165 if (!success) {
2166 _total_bailout_count++;
2167 if (UsePerfData) {
2168 _perf_last_failed_method->set_value(counters->current_method());
2169 _perf_last_failed_type->set_value(counters->compile_type());
2170 _perf_total_bailout_count->inc();
2171 }
2172 _t_bailedout_compilation.add(time);
2173 } else if (code == NULL) {
2174 if (UsePerfData) {
2175 _perf_last_invalidated_method->set_value(counters->current_method());
2176 _perf_last_invalidated_type->set_value(counters->compile_type());
2177 _perf_total_invalidated_count->inc();
2178 }
2179 _total_invalidated_count++;
2180 _t_invalidated_compilation.add(time);
2181 } else {
2182 // Compilation succeeded
2183
2184 // update compilation ticks - used by the implementation of
2185 // java.lang.management.CompilationMBean
2186 _perf_total_compilation->inc(time.ticks());
2187 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2188
2189 if (CITime) {
2190 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2191 if (is_osr) {
2192 _t_osr_compilation.add(time);
2193 _sum_osr_bytes_compiled += bytes_compiled;
2194 } else {
2195 _t_standard_compilation.add(time);
2196 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2197 }
2198
2199 #if INCLUDE_JVMCI
2200 AbstractCompiler* comp = compiler(task->comp_level());
2201 if (comp) {
2202 CompilerStatistics* stats = comp->stats();
2203 if (stats) {
2204 if (is_osr) {
2205 stats->_osr.update(time, bytes_compiled);
2206 } else {
2207 stats->_standard.update(time, bytes_compiled);
2208 }
2209 stats->_nmethods_size += code->total_size();
2210 stats->_nmethods_code_size += code->insts_size();
2211 } else { // if (!stats)
2212 assert(false, "Compiler statistics object must exist");
2213 }
2214 } else { // if (!comp)
2215 assert(false, "Compiler object must exist");
2216 }
2217 #endif // INCLUDE_JVMCI
2218 }
2219
2220 if (UsePerfData) {
2221 // save the name of the last method compiled
2222 _perf_last_method->set_value(counters->current_method());
2223 _perf_last_compile_type->set_value(counters->compile_type());
2224 _perf_last_compile_size->set_value(method->code_size() +
2225 task->num_inlined_bytecodes());
2226 if (is_osr) {
2227 _perf_osr_compilation->inc(time.ticks());
2228 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2229 } else {
2230 _perf_standard_compilation->inc(time.ticks());
2231 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2232 }
2233 }
2234
2235 if (CITimeEach) {
2236 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2237 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2238 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2239 }
2240
2241 // Collect counts of successful compilations
2242 _sum_nmethod_size += code->total_size();
2243 _sum_nmethod_code_size += code->insts_size();
2244 _total_compile_count++;
2245
2246 if (UsePerfData) {
2247 _perf_sum_nmethod_size->inc( code->total_size());
2248 _perf_sum_nmethod_code_size->inc(code->insts_size());
2249 _perf_total_compile_count->inc();
2250 }
2251
2252 if (is_osr) {
2253 if (UsePerfData) _perf_total_osr_compile_count->inc();
2254 _total_osr_compile_count++;
2255 } else {
2256 if (UsePerfData) _perf_total_standard_compile_count->inc();
2257 _total_standard_compile_count++;
2258 }
2259 }
2260 // set the current method for the thread to null
2261 if (UsePerfData) counters->set_current_method("");
2262 }
2263
2264 const char* CompileBroker::compiler_name(int comp_level) {
2265 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2266 if (comp == NULL) {
2267 return "no compiler";
2268 } else {
2269 return (comp->name());
2270 }
2271 }
2272
2273 #if INCLUDE_JVMCI
2274 void CompileBroker::print_times(AbstractCompiler* comp) {
2275 CompilerStatistics* stats = comp->stats();
2276 if (stats) {
2277 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}",
2278 comp->name(), stats->bytes_per_second(),
2279 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2280 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2281 stats->_nmethods_size, stats->_nmethods_code_size);
2282 } else { // if (!stats)
2283 assert(false, "Compiler statistics object must exist");
2284 }
2285 comp->print_timers();
2286 }
2287 #endif // INCLUDE_JVMCI
2288
2289 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2290 #if INCLUDE_JVMCI
2291 elapsedTimer standard_compilation;
2292 elapsedTimer total_compilation;
2293 elapsedTimer osr_compilation;
2294
2295 int standard_bytes_compiled = 0;
2296 int osr_bytes_compiled = 0;
2297
2298 int standard_compile_count = 0;
2299 int osr_compile_count = 0;
2300 int total_compile_count = 0;
2301
2302 int nmethods_size = 0;
2303 int nmethods_code_size = 0;
2304 bool printedHeader = false;
2305
2306 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2307 AbstractCompiler* comp = _compilers[i];
2308 if (comp != NULL) {
2309 if (per_compiler && aggregate && !printedHeader) {
2310 printedHeader = true;
2311 tty->cr();
2312 tty->print_cr("Individual compiler times (for compiled methods only)");
2313 tty->print_cr("------------------------------------------------");
2314 tty->cr();
2315 }
2316 CompilerStatistics* stats = comp->stats();
2317
2318 if (stats) {
2319 standard_compilation.add(stats->_standard._time);
2320 osr_compilation.add(stats->_osr._time);
2321
2322 standard_bytes_compiled += stats->_standard._bytes;
2323 osr_bytes_compiled += stats->_osr._bytes;
2324
2325 standard_compile_count += stats->_standard._count;
2326 osr_compile_count += stats->_osr._count;
2327
2328 nmethods_size += stats->_nmethods_size;
2329 nmethods_code_size += stats->_nmethods_code_size;
2330 } else { // if (!stats)
2331 assert(false, "Compiler statistics object must exist");
2332 }
2333
2334 if (per_compiler) {
2335 print_times(comp);
2336 }
2337 }
2338 }
2339 total_compile_count = osr_compile_count + standard_compile_count;
2340 total_compilation.add(osr_compilation);
2341 total_compilation.add(standard_compilation);
2342
2343 // In hosted mode, print the JVMCI compiler specific counters manually.
2344 if (!UseJVMCICompiler) {
2345 JVMCICompiler::print_compilation_timers();
2346 }
2347 #else // INCLUDE_JVMCI
2348 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2349 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2350 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2351
2352 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2353 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2354
2355 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2356 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2357 int total_compile_count = CompileBroker::_total_compile_count;
2358
2359 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2360 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2361 #endif // INCLUDE_JVMCI
2362
2363 if (!aggregate) {
2364 return;
2365 }
2366 tty->cr();
2367 tty->print_cr("Accumulated compiler times");
2368 tty->print_cr("----------------------------------------------------------");
2369 //0000000000111111111122222222223333333333444444444455555555556666666666
2370 //0123456789012345678901234567890123456789012345678901234567890123456789
2371 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2372 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2373 standard_compilation.seconds(),
2374 standard_compilation.seconds() / standard_compile_count);
2375 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2376 CompileBroker::_t_bailedout_compilation.seconds(),
2377 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2378 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2379 osr_compilation.seconds(),
2380 osr_compilation.seconds() / osr_compile_count);
2381 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2382 CompileBroker::_t_invalidated_compilation.seconds(),
2383 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2384
2385 AbstractCompiler *comp = compiler(CompLevel_simple);
2386 if (comp != NULL) {
2387 tty->cr();
2388 comp->print_timers();
2389 }
2390 comp = compiler(CompLevel_full_optimization);
2391 if (comp != NULL) {
2392 tty->cr();
2393 comp->print_timers();
2394 }
2395 tty->cr();
2396 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2397 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2398 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2399 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2400 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2401 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2402 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2403 double tcs = total_compilation.seconds();
2404 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2405 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2406 tty->cr();
2407 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2408 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2409 }
2410
2411 // Debugging output for failure
2412 void CompileBroker::print_last_compile() {
2413 if (_last_compile_level != CompLevel_none &&
2414 compiler(_last_compile_level) != NULL &&
2415 _last_compile_type != no_compile) {
2416 if (_last_compile_type == osr_compile) {
2417 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2418 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2419 } else {
2420 tty->print_cr("Last parse: %d+++(%d) %s",
2421 _compilation_id, _last_compile_level, _last_method_compiled);
2422 }
2423 }
2424 }