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/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/codeCache.hpp"
29 #include "code/dependencyContext.hpp"
30 #include "compiler/compileBroker.hpp"
31 #include "compiler/compileLog.hpp"
32 #include "compiler/compilerOracle.hpp"
33 #include "compiler/directivesParser.hpp"
34 #include "interpreter/linkResolver.hpp"
35 #include "memory/allocation.inline.hpp"
36 #include "oops/methodData.hpp"
37 #include "oops/method.hpp"
38 #include "oops/oop.inline.hpp"
39 #include "prims/nativeLookup.hpp"
40 #include "prims/whitebox.hpp"
41 #include "runtime/arguments.hpp"
42 #include "runtime/atomic.inline.hpp"
43 #include "runtime/compilationPolicy.hpp"
44 #include "runtime/init.hpp"
45 #include "runtime/interfaceSupport.hpp"
46 #include "runtime/javaCalls.hpp"
47 #include "runtime/os.hpp"
48 #include "runtime/sharedRuntime.hpp"
49 #include "runtime/sweeper.hpp"
50 #include "trace/tracing.hpp"
51 #include "utilities/dtrace.hpp"
52 #include "utilities/events.hpp"
53 #ifdef COMPILER1
54 #include "c1/c1_Compiler.hpp"
55 #endif
56 #if INCLUDE_JVMCI
57 #include "jvmci/jvmciCompiler.hpp"
58 #include "jvmci/jvmciRuntime.hpp"
59 #include "runtime/vframe.hpp"
60 #endif
61 #ifdef COMPILER2
62 #include "opto/c2compiler.hpp"
63 #endif
64 #ifdef SHARK
65 #include "shark/sharkCompiler.hpp"
66 #endif
67
68 #ifdef DTRACE_ENABLED
69
70 // Only bother with this argument setup if dtrace is available
71
72 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
73 { \
74 Symbol* klass_name = (method)->klass_name(); \
75 Symbol* name = (method)->name(); \
76 Symbol* signature = (method)->signature(); \
77 HOTSPOT_METHOD_COMPILE_BEGIN( \
78 (char *) comp_name, strlen(comp_name), \
79 (char *) klass_name->bytes(), klass_name->utf8_length(), \
80 (char *) name->bytes(), name->utf8_length(), \
81 (char *) signature->bytes(), signature->utf8_length()); \
82 }
83
84 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
85 { \
86 Symbol* klass_name = (method)->klass_name(); \
87 Symbol* name = (method)->name(); \
88 Symbol* signature = (method)->signature(); \
89 HOTSPOT_METHOD_COMPILE_END( \
90 (char *) comp_name, strlen(comp_name), \
91 (char *) klass_name->bytes(), klass_name->utf8_length(), \
92 (char *) name->bytes(), name->utf8_length(), \
93 (char *) signature->bytes(), signature->utf8_length(), (success)); \
94 }
95
96 #else // ndef DTRACE_ENABLED
97
98 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
99 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
100
101 #endif // ndef DTRACE_ENABLED
102
103 bool CompileBroker::_initialized = false;
104 volatile bool CompileBroker::_should_block = false;
105 volatile jint CompileBroker::_print_compilation_warning = 0;
106 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
107
108 // The installed compiler(s)
109 AbstractCompiler* CompileBroker::_compilers[2];
110
111 // These counters are used to assign an unique ID to each compilation.
112 volatile jint CompileBroker::_compilation_id = 0;
113 volatile jint CompileBroker::_osr_compilation_id = 0;
114
115 // Debugging information
116 int CompileBroker::_last_compile_type = no_compile;
117 int CompileBroker::_last_compile_level = CompLevel_none;
118 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
119
120 // Performance counters
121 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
122 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
123 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
124
125 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
126 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
127 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
128 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
129 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
130
131 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
132 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
133 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
134 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
135
136 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
137 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
138 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
139 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
140 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
141 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
142 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
143
144 // Timers and counters for generating statistics
145 elapsedTimer CompileBroker::_t_total_compilation;
146 elapsedTimer CompileBroker::_t_osr_compilation;
147 elapsedTimer CompileBroker::_t_standard_compilation;
148 elapsedTimer CompileBroker::_t_invalidated_compilation;
149 elapsedTimer CompileBroker::_t_bailedout_compilation;
150
151 int CompileBroker::_total_bailout_count = 0;
152 int CompileBroker::_total_invalidated_count = 0;
153 int CompileBroker::_total_compile_count = 0;
154 int CompileBroker::_total_osr_compile_count = 0;
155 int CompileBroker::_total_standard_compile_count = 0;
156
157 int CompileBroker::_sum_osr_bytes_compiled = 0;
158 int CompileBroker::_sum_standard_bytes_compiled = 0;
159 int CompileBroker::_sum_nmethod_size = 0;
160 int CompileBroker::_sum_nmethod_code_size = 0;
161
162 long CompileBroker::_peak_compilation_time = 0;
163
164 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
165 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
166
167 class CompilationLog : public StringEventLog {
168 public:
169 CompilationLog() : StringEventLog("Compilation events") {
170 }
171
172 void log_compile(JavaThread* thread, CompileTask* task) {
173 StringLogMessage lm;
174 stringStream sstr = lm.stream();
175 // msg.time_stamp().update_to(tty->time_stamp().ticks());
176 task->print(&sstr, NULL, true, false);
177 log(thread, "%s", (const char*)lm);
178 }
179
180 void log_nmethod(JavaThread* thread, nmethod* nm) {
181 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
182 nm->compile_id(), nm->is_osr_method() ? "%" : "",
183 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
184 }
185
186 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
187 StringLogMessage lm;
188 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
189 if (retry_message != NULL) {
190 lm.append(" (%s)", retry_message);
191 }
192 lm.print("\n");
193 log(thread, "%s", (const char*)lm);
194 }
195
196 void log_metaspace_failure(const char* reason) {
197 ResourceMark rm;
198 StringLogMessage lm;
199 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
200 lm.print("\n");
201 log(JavaThread::current(), "%s", (const char*)lm);
202 }
203 };
204
205 static CompilationLog* _compilation_log = NULL;
206
207 bool compileBroker_init() {
208 if (LogEvents) {
209 _compilation_log = new CompilationLog();
210 }
211
212 // init directives stack, adding default directive
213 DirectivesStack::init();
214
215 if (DirectivesParser::has_file()) {
216 return DirectivesParser::parse_from_flag();
217 } else if (PrintCompilerDirectives) {
218 // Print default directive even when no other was added
219 DirectivesStack::print(tty);
220 }
221
222 return true;
223 }
224
225 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
226 CompilerThread* thread = CompilerThread::current();
227 thread->set_task(task);
228 CompileLog* log = thread->log();
229 if (log != NULL) task->log_task_start(log);
230 }
231
232 CompileTaskWrapper::~CompileTaskWrapper() {
233 CompilerThread* thread = CompilerThread::current();
234 CompileTask* task = thread->task();
235 CompileLog* log = thread->log();
236 if (log != NULL) task->log_task_done(log);
237 thread->set_task(NULL);
238 task->set_code_handle(NULL);
239 thread->set_env(NULL);
240 if (task->is_blocking()) {
241 bool free_task = false;
242 {
243 MutexLocker notifier(task->lock(), thread);
244 task->mark_complete();
245 #if INCLUDE_JVMCI
246 if (CompileBroker::compiler(task->comp_level())->is_jvmci() &&
247 !task->has_waiter()) {
248 // The waiting thread timed out and thus did not free the task.
249 free_task = true;
250 }
251 #endif
252 if (!free_task) {
253 // Notify the waiting thread that the compilation has completed
254 // so that it can free the task.
255 task->lock()->notify_all();
256 }
257 }
258 if (free_task) {
259 // The task can only be freed once the task lock is released.
260 CompileTask::free(task);
261 }
262 } else {
263 task->mark_complete();
264
265 // By convention, the compiling thread is responsible for
266 // recycling a non-blocking CompileTask.
267 CompileTask::free(task);
268 }
269 }
270
271 /**
272 * Add a CompileTask to a CompileQueue.
273 */
274 void CompileQueue::add(CompileTask* task) {
275 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
276
277 task->set_next(NULL);
278 task->set_prev(NULL);
279
280 if (_last == NULL) {
281 // The compile queue is empty.
282 assert(_first == NULL, "queue is empty");
283 _first = task;
284 _last = task;
285 } else {
286 // Append the task to the queue.
287 assert(_last->next() == NULL, "not last");
288 _last->set_next(task);
289 task->set_prev(_last);
290 _last = task;
291 }
292 ++_size;
293
294 // Mark the method as being in the compile queue.
295 task->method()->set_queued_for_compilation();
296
297 if (CIPrintCompileQueue) {
298 print_tty();
299 }
300
301 if (LogCompilation && xtty != NULL) {
302 task->log_task_queued();
303 }
304
305 // Notify CompilerThreads that a task is available.
306 MethodCompileQueue_lock->notify_all();
307 }
308
309 /**
310 * Empties compilation queue by putting all compilation tasks onto
311 * a freelist. Furthermore, the method wakes up all threads that are
312 * waiting on a compilation task to finish. This can happen if background
313 * compilation is disabled.
314 */
315 void CompileQueue::free_all() {
316 MutexLocker mu(MethodCompileQueue_lock);
317 CompileTask* next = _first;
318
319 // Iterate over all tasks in the compile queue
320 while (next != NULL) {
321 CompileTask* current = next;
322 next = current->next();
323 {
324 // Wake up thread that blocks on the compile task.
325 MutexLocker ct_lock(current->lock());
326 current->lock()->notify();
327 }
328 // Put the task back on the freelist.
329 CompileTask::free(current);
330 }
331 _first = NULL;
332
333 // Wake up all threads that block on the queue.
334 MethodCompileQueue_lock->notify_all();
335 }
336
337 /**
338 * Get the next CompileTask from a CompileQueue
339 */
340 CompileTask* CompileQueue::get() {
341 // save methods from RedefineClasses across safepoint
342 // across MethodCompileQueue_lock below.
343 methodHandle save_method;
344 methodHandle save_hot_method;
345
346 MutexLocker locker(MethodCompileQueue_lock);
347 // If _first is NULL we have no more compile jobs. There are two reasons for
348 // having no compile jobs: First, we compiled everything we wanted. Second,
349 // we ran out of code cache so compilation has been disabled. In the latter
350 // case we perform code cache sweeps to free memory such that we can re-enable
351 // compilation.
352 while (_first == NULL) {
353 // Exit loop if compilation is disabled forever
354 if (CompileBroker::is_compilation_disabled_forever()) {
355 return NULL;
356 }
357
358 // If there are no compilation tasks and we can compile new jobs
359 // (i.e., there is enough free space in the code cache) there is
360 // no need to invoke the sweeper. As a result, the hotness of methods
361 // remains unchanged. This behavior is desired, since we want to keep
362 // the stable state, i.e., we do not want to evict methods from the
363 // code cache if it is unnecessary.
364 // We need a timed wait here, since compiler threads can exit if compilation
365 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
366 // is not critical and we do not want idle compiler threads to wake up too often.
367 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
368 }
369
370 if (CompileBroker::is_compilation_disabled_forever()) {
371 return NULL;
372 }
373
374 CompileTask* task;
375 {
376 No_Safepoint_Verifier nsv;
377 task = CompilationPolicy::policy()->select_task(this);
378 }
379
380 // Save method pointers across unlock safepoint. The task is removed from
381 // the compilation queue, which is walked during RedefineClasses.
382 save_method = methodHandle(task->method());
383 save_hot_method = methodHandle(task->hot_method());
384
385 remove(task);
386 purge_stale_tasks(); // may temporarily release MCQ lock
387 return task;
388 }
389
390 // Clean & deallocate stale compile tasks.
391 // Temporarily releases MethodCompileQueue lock.
392 void CompileQueue::purge_stale_tasks() {
393 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
394 if (_first_stale != NULL) {
395 // Stale tasks are purged when MCQ lock is released,
396 // but _first_stale updates are protected by MCQ lock.
397 // Once task processing starts and MCQ lock is released,
398 // other compiler threads can reuse _first_stale.
399 CompileTask* head = _first_stale;
400 _first_stale = NULL;
401 {
402 MutexUnlocker ul(MethodCompileQueue_lock);
403 for (CompileTask* task = head; task != NULL; ) {
404 CompileTask* next_task = task->next();
405 CompileTaskWrapper ctw(task); // Frees the task
406 task->set_failure_reason("stale task");
407 task = next_task;
408 }
409 }
410 }
411 }
412
413 void CompileQueue::remove(CompileTask* task) {
414 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
415 if (task->prev() != NULL) {
416 task->prev()->set_next(task->next());
417 } else {
418 // max is the first element
419 assert(task == _first, "Sanity");
420 _first = task->next();
421 }
422
423 if (task->next() != NULL) {
424 task->next()->set_prev(task->prev());
425 } else {
426 // max is the last element
427 assert(task == _last, "Sanity");
428 _last = task->prev();
429 }
430 --_size;
431 }
432
433 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
434 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
435 remove(task);
436
437 // Enqueue the task for reclamation (should be done outside MCQ lock)
438 task->set_next(_first_stale);
439 task->set_prev(NULL);
440 _first_stale = task;
441 }
442
443 // methods in the compile queue need to be marked as used on the stack
444 // so that they don't get reclaimed by Redefine Classes
445 void CompileQueue::mark_on_stack() {
446 CompileTask* task = _first;
447 while (task != NULL) {
448 task->mark_on_stack();
449 task = task->next();
450 }
451 }
452
453
454 CompileQueue* CompileBroker::compile_queue(int comp_level) {
455 if (is_c2_compile(comp_level)) return _c2_compile_queue;
456 if (is_c1_compile(comp_level)) return _c1_compile_queue;
457 return NULL;
458 }
459
460
461 void CompileBroker::print_compile_queues(outputStream* st) {
462 MutexLocker locker(MethodCompileQueue_lock);
463 if (_c1_compile_queue != NULL) {
464 _c1_compile_queue->print(st);
465 }
466 if (_c2_compile_queue != NULL) {
467 _c2_compile_queue->print(st);
468 }
469 }
470
471 void CompileQueue::print(outputStream* st) {
472 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
473 st->print_cr("Contents of %s", name());
474 st->print_cr("----------------------------");
475 CompileTask* task = _first;
476 if (task == NULL) {
477 st->print_cr("Empty");
478 } else {
479 while (task != NULL) {
480 task->print(st, NULL, true, true);
481 task = task->next();
482 }
483 }
484 st->print_cr("----------------------------");
485 }
486
487 void CompileQueue::print_tty() {
488 ttyLocker ttyl;
489 print(tty);
490 }
491
492 CompilerCounters::CompilerCounters() {
493 _current_method[0] = '\0';
494 _compile_type = CompileBroker::no_compile;
495 }
496
497 // ------------------------------------------------------------------
498 // CompileBroker::compilation_init
499 //
500 // Initialize the Compilation object
501 void CompileBroker::compilation_init() {
502 _last_method_compiled[0] = '\0';
503
504 // No need to initialize compilation system if we do not use it.
505 if (!UseCompiler) {
506 return;
507 }
508 #ifndef SHARK
509 // Set the interface to the current compiler(s).
510 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
511 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
512
513 #if INCLUDE_JVMCI
514 if (EnableJVMCI) {
515 // This is creating a JVMCICompiler singleton.
516 JVMCICompiler* jvmci = new JVMCICompiler();
517
518 if (UseJVMCICompiler) {
519 _compilers[1] = jvmci;
520 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
521 if (BootstrapJVMCI) {
522 // JVMCI will bootstrap so give it more threads
523 c2_count = MIN2(32, os::active_processor_count());
524 }
525 } else {
526 c2_count = JVMCIThreads;
527 }
528 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
529 } else {
530 c1_count = JVMCIHostThreads;
531 }
532 }
533 }
534 #endif // INCLUDE_JVMCI
535
536 #ifdef COMPILER1
537 if (c1_count > 0) {
538 _compilers[0] = new Compiler();
539 }
540 #endif // COMPILER1
541
542 #ifdef COMPILER2
543 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
544 if (c2_count > 0) {
545 _compilers[1] = new C2Compiler();
546 }
547 }
548 #endif // COMPILER2
549
550 #else // SHARK
551 int c1_count = 0;
552 int c2_count = 1;
553
554 _compilers[1] = new SharkCompiler();
555 #endif // SHARK
556
557 // Start the compiler thread(s) and the sweeper thread
558 init_compiler_sweeper_threads(c1_count, c2_count);
559 // totalTime performance counter is always created as it is required
560 // by the implementation of java.lang.management.CompilationMBean.
561 {
562 EXCEPTION_MARK;
563 _perf_total_compilation =
564 PerfDataManager::create_counter(JAVA_CI, "totalTime",
565 PerfData::U_Ticks, CHECK);
566 }
567
568 if (UsePerfData) {
569
570 EXCEPTION_MARK;
571
572 // create the jvmstat performance counters
573 _perf_osr_compilation =
574 PerfDataManager::create_counter(SUN_CI, "osrTime",
575 PerfData::U_Ticks, CHECK);
576
577 _perf_standard_compilation =
578 PerfDataManager::create_counter(SUN_CI, "standardTime",
579 PerfData::U_Ticks, CHECK);
580
581 _perf_total_bailout_count =
582 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
583 PerfData::U_Events, CHECK);
584
585 _perf_total_invalidated_count =
586 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
587 PerfData::U_Events, CHECK);
588
589 _perf_total_compile_count =
590 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
591 PerfData::U_Events, CHECK);
592 _perf_total_osr_compile_count =
593 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
594 PerfData::U_Events, CHECK);
595
596 _perf_total_standard_compile_count =
597 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
598 PerfData::U_Events, CHECK);
599
600 _perf_sum_osr_bytes_compiled =
601 PerfDataManager::create_counter(SUN_CI, "osrBytes",
602 PerfData::U_Bytes, CHECK);
603
604 _perf_sum_standard_bytes_compiled =
605 PerfDataManager::create_counter(SUN_CI, "standardBytes",
606 PerfData::U_Bytes, CHECK);
607
608 _perf_sum_nmethod_size =
609 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
610 PerfData::U_Bytes, CHECK);
611
612 _perf_sum_nmethod_code_size =
613 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
614 PerfData::U_Bytes, CHECK);
615
616 _perf_last_method =
617 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
618 CompilerCounters::cmname_buffer_length,
619 "", CHECK);
620
621 _perf_last_failed_method =
622 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
623 CompilerCounters::cmname_buffer_length,
624 "", CHECK);
625
626 _perf_last_invalidated_method =
627 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
628 CompilerCounters::cmname_buffer_length,
629 "", CHECK);
630
631 _perf_last_compile_type =
632 PerfDataManager::create_variable(SUN_CI, "lastType",
633 PerfData::U_None,
634 (jlong)CompileBroker::no_compile,
635 CHECK);
636
637 _perf_last_compile_size =
638 PerfDataManager::create_variable(SUN_CI, "lastSize",
639 PerfData::U_Bytes,
640 (jlong)CompileBroker::no_compile,
641 CHECK);
642
643
644 _perf_last_failed_type =
645 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
646 PerfData::U_None,
647 (jlong)CompileBroker::no_compile,
648 CHECK);
649
650 _perf_last_invalidated_type =
651 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
652 PerfData::U_None,
653 (jlong)CompileBroker::no_compile,
654 CHECK);
655 }
656
657 _initialized = true;
658 }
659
660
661 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
662 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
663 JavaThread* thread = NULL;
664 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
665 instanceKlassHandle klass (THREAD, k);
666 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
667 Handle string = java_lang_String::create_from_str(name, CHECK_0);
668
669 // Initialize thread_oop to put it into the system threadGroup
670 Handle thread_group (THREAD, Universe::system_thread_group());
671 JavaValue result(T_VOID);
672 JavaCalls::call_special(&result, thread_oop,
673 klass,
674 vmSymbols::object_initializer_name(),
675 vmSymbols::threadgroup_string_void_signature(),
676 thread_group,
677 string,
678 CHECK_0);
679
680 {
681 MutexLocker mu(Threads_lock, THREAD);
682 if (compiler_thread) {
683 thread = new CompilerThread(queue, counters);
684 } else {
685 thread = new CodeCacheSweeperThread();
686 }
687 // At this point the new CompilerThread data-races with this startup
688 // thread (which I believe is the primoridal thread and NOT the VM
689 // thread). This means Java bytecodes being executed at startup can
690 // queue compile jobs which will run at whatever default priority the
691 // newly created CompilerThread runs at.
692
693
694 // At this point it may be possible that no osthread was created for the
695 // JavaThread due to lack of memory. We would have to throw an exception
696 // in that case. However, since this must work and we do not allow
697 // exceptions anyway, check and abort if this fails.
698
699 if (thread == NULL || thread->osthread() == NULL) {
700 vm_exit_during_initialization("java.lang.OutOfMemoryError",
701 os::native_thread_creation_failed_msg());
702 }
703
704 java_lang_Thread::set_thread(thread_oop(), thread);
705
706 // Note that this only sets the JavaThread _priority field, which by
707 // definition is limited to Java priorities and not OS priorities.
708 // The os-priority is set in the CompilerThread startup code itself
709
710 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
711
712 // Note that we cannot call os::set_priority because it expects Java
713 // priorities and we are *explicitly* using OS priorities so that it's
714 // possible to set the compiler thread priority higher than any Java
715 // thread.
716
717 int native_prio = CompilerThreadPriority;
718 if (native_prio == -1) {
719 if (UseCriticalCompilerThreadPriority) {
720 native_prio = os::java_to_os_priority[CriticalPriority];
721 } else {
722 native_prio = os::java_to_os_priority[NearMaxPriority];
723 }
724 }
725 os::set_native_priority(thread, native_prio);
726
727 java_lang_Thread::set_daemon(thread_oop());
728
729 thread->set_threadObj(thread_oop());
730 if (compiler_thread) {
731 thread->as_CompilerThread()->set_compiler(comp);
732 }
733 Threads::add(thread);
734 Thread::start(thread);
735 }
736
737 // Let go of Threads_lock before yielding
738 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
739
740 return thread;
741 }
742
743
744 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
745 EXCEPTION_MARK;
746 #if !defined(ZERO) && !defined(SHARK)
747 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
748 #endif // !ZERO && !SHARK
749 // Initialize the compilation queue
750 if (c2_compiler_count > 0) {
751 _c2_compile_queue = new CompileQueue("C2 compile queue");
752 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
753 }
754 if (c1_compiler_count > 0) {
755 _c1_compile_queue = new CompileQueue("C1 compile queue");
756 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
757 }
758
759 int compiler_count = c1_compiler_count + c2_compiler_count;
760
761 char name_buffer[256];
762 const bool compiler_thread = true;
763 for (int i = 0; i < c2_compiler_count; i++) {
764 // Create a name for our thread.
765 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
766 CompilerCounters* counters = new CompilerCounters();
767 // Shark and C2
768 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
769 }
770
771 for (int i = c2_compiler_count; i < compiler_count; i++) {
772 // Create a name for our thread.
773 sprintf(name_buffer, "C1 CompilerThread%d", i);
774 CompilerCounters* counters = new CompilerCounters();
775 // C1
776 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
777 }
778
779 if (UsePerfData) {
780 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
781 }
782
783 if (MethodFlushing) {
784 // Initialize the sweeper thread
785 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
786 }
787 }
788
789
790 /**
791 * Set the methods on the stack as on_stack so that redefine classes doesn't
792 * reclaim them. This method is executed at a safepoint.
793 */
794 void CompileBroker::mark_on_stack() {
795 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
796 // Since we are at a safepoint, we do not need a lock to access
797 // the compile queues.
798 if (_c2_compile_queue != NULL) {
799 _c2_compile_queue->mark_on_stack();
800 }
801 if (_c1_compile_queue != NULL) {
802 _c1_compile_queue->mark_on_stack();
803 }
804 }
805
806 // ------------------------------------------------------------------
807 // CompileBroker::compile_method
808 //
809 // Request compilation of a method.
810 void CompileBroker::compile_method_base(const methodHandle& method,
811 int osr_bci,
812 int comp_level,
813 const methodHandle& hot_method,
814 int hot_count,
815 const char* comment,
816 Thread* thread) {
817 // do nothing if compiler thread(s) is not available
818 if (!_initialized) {
819 return;
820 }
821
822 guarantee(!method->is_abstract(), "cannot compile abstract methods");
823 assert(method->method_holder()->is_instance_klass(),
824 "sanity check");
825 assert(!method->method_holder()->is_not_initialized(),
826 "method holder must be initialized");
827 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
828
829 if (CIPrintRequests) {
830 tty->print("request: ");
831 method->print_short_name(tty);
832 if (osr_bci != InvocationEntryBci) {
833 tty->print(" osr_bci: %d", osr_bci);
834 }
835 tty->print(" level: %d comment: %s count: %d", comp_level, comment, hot_count);
836 if (!hot_method.is_null()) {
837 tty->print(" hot: ");
838 if (hot_method() != method()) {
839 hot_method->print_short_name(tty);
840 } else {
841 tty->print("yes");
842 }
843 }
844 tty->cr();
845 }
846
847 // A request has been made for compilation. Before we do any
848 // real work, check to see if the method has been compiled
849 // in the meantime with a definitive result.
850 if (compilation_is_complete(method, osr_bci, comp_level)) {
851 return;
852 }
853
854 #ifndef PRODUCT
855 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
856 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
857 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
858 return;
859 }
860 }
861 #endif
862
863 // If this method is already in the compile queue, then
864 // we do not block the current thread.
865 if (compilation_is_in_queue(method)) {
866 // We may want to decay our counter a bit here to prevent
867 // multiple denied requests for compilation. This is an
868 // open compilation policy issue. Note: The other possibility,
869 // in the case that this is a blocking compile request, is to have
870 // all subsequent blocking requesters wait for completion of
871 // ongoing compiles. Note that in this case we'll need a protocol
872 // for freeing the associated compile tasks. [Or we could have
873 // a single static monitor on which all these waiters sleep.]
874 return;
875 }
876
877 // If the requesting thread is holding the pending list lock
878 // then we just return. We can't risk blocking while holding
879 // the pending list lock or a 3-way deadlock may occur
880 // between the reference handler thread, a GC (instigated
881 // by a compiler thread), and compiled method registration.
882 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
883 return;
884 }
885
886 if (TieredCompilation) {
887 // Tiered policy requires MethodCounters to exist before adding a method to
888 // the queue. Create if we don't have them yet.
889 method->get_method_counters(thread);
890 }
891
892 // Outputs from the following MutexLocker block:
893 CompileTask* task = NULL;
894 bool blocking = false;
895 CompileQueue* queue = compile_queue(comp_level);
896
897 // Acquire our lock.
898 {
899 MutexLocker locker(MethodCompileQueue_lock, thread);
900
901 // Make sure the method has not slipped into the queues since
902 // last we checked; note that those checks were "fast bail-outs".
903 // Here we need to be more careful, see 14012000 below.
904 if (compilation_is_in_queue(method)) {
905 return;
906 }
907
908 // We need to check again to see if the compilation has
909 // completed. A previous compilation may have registered
910 // some result.
911 if (compilation_is_complete(method, osr_bci, comp_level)) {
912 return;
913 }
914
915 // We now know that this compilation is not pending, complete,
916 // or prohibited. Assign a compile_id to this compilation
917 // and check to see if it is in our [Start..Stop) range.
918 int compile_id = assign_compile_id(method, osr_bci);
919 if (compile_id == 0) {
920 // The compilation falls outside the allowed range.
921 return;
922 }
923
924 // Should this thread wait for completion of the compile?
925 blocking = is_compile_blocking();
926
927 #if INCLUDE_JVMCI
928 if (UseJVMCICompiler) {
929 if (blocking) {
930 // Don't allow blocking compiles for requests triggered by JVMCI.
931 if (thread->is_Compiler_thread()) {
932 blocking = false;
933 }
934
935 // Don't allow blocking compiles if inside a class initializer or while performing class loading
936 vframeStream vfst((JavaThread*) thread);
937 for (; !vfst.at_end(); vfst.next()) {
938 if (vfst.method()->is_static_initializer() ||
939 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
940 vfst.method()->name() == vmSymbols::loadClass_name())) {
941 blocking = false;
942 break;
943 }
944 }
945
946 // Don't allow blocking compilation requests to JVMCI
947 // if JVMCI itself is not yet initialized
948 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
949 blocking = false;
950 }
951
952 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
953 // to avoid deadlock between compiler thread(s) and threads run at shutdown
954 // such as the DestroyJavaVM thread.
955 if (JVMCIRuntime::shutdown_called()) {
956 blocking = false;
957 }
958 }
959 }
960 #endif // INCLUDE_JVMCI
961
962 // We will enter the compilation in the queue.
963 // 14012000: Note that this sets the queued_for_compile bits in
964 // the target method. We can now reason that a method cannot be
965 // queued for compilation more than once, as follows:
966 // Before a thread queues a task for compilation, it first acquires
967 // the compile queue lock, then checks if the method's queued bits
968 // are set or it has already been compiled. Thus there can not be two
969 // instances of a compilation task for the same method on the
970 // compilation queue. Consider now the case where the compilation
971 // thread has already removed a task for that method from the queue
972 // and is in the midst of compiling it. In this case, the
973 // queued_for_compile bits must be set in the method (and these
974 // will be visible to the current thread, since the bits were set
975 // under protection of the compile queue lock, which we hold now.
976 // When the compilation completes, the compiler thread first sets
977 // the compilation result and then clears the queued_for_compile
978 // bits. Neither of these actions are protected by a barrier (or done
979 // under the protection of a lock), so the only guarantee we have
980 // (on machines with TSO (Total Store Order)) is that these values
981 // will update in that order. As a result, the only combinations of
982 // these bits that the current thread will see are, in temporal order:
983 // <RESULT, QUEUE> :
984 // <0, 1> : in compile queue, but not yet compiled
985 // <1, 1> : compiled but queue bit not cleared
986 // <1, 0> : compiled and queue bit cleared
987 // Because we first check the queue bits then check the result bits,
988 // we are assured that we cannot introduce a duplicate task.
989 // Note that if we did the tests in the reverse order (i.e. check
990 // result then check queued bit), we could get the result bit before
991 // the compilation completed, and the queue bit after the compilation
992 // completed, and end up introducing a "duplicate" (redundant) task.
993 // In that case, the compiler thread should first check if a method
994 // has already been compiled before trying to compile it.
995 // NOTE: in the event that there are multiple compiler threads and
996 // there is de-optimization/recompilation, things will get hairy,
997 // and in that case it's best to protect both the testing (here) of
998 // these bits, and their updating (here and elsewhere) under a
999 // common lock.
1000 task = create_compile_task(queue,
1001 compile_id, method,
1002 osr_bci, comp_level,
1003 hot_method, hot_count, comment,
1004 blocking);
1005 }
1006
1007 if (blocking) {
1008 wait_for_completion(task);
1009 }
1010 }
1011
1012
1013 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1014 int comp_level,
1015 const methodHandle& hot_method, int hot_count,
1016 const char* comment, Thread* THREAD) {
1017 // make sure arguments make sense
1018 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1019 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1020 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1021 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1022 // allow any levels for WhiteBox
1023 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1024 // return quickly if possible
1025
1026 // lock, make sure that the compilation
1027 // isn't prohibited in a straightforward way.
1028 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1029 if (comp == NULL || !comp->can_compile_method(method) ||
1030 compilation_is_prohibited(method, osr_bci, comp_level)) {
1031 return NULL;
1032 }
1033
1034 if (osr_bci == InvocationEntryBci) {
1035 // standard compilation
1036 nmethod* method_code = method->code();
1037 if (method_code != NULL) {
1038 if (compilation_is_complete(method, osr_bci, comp_level)) {
1039 return method_code;
1040 }
1041 }
1042 if (method->is_not_compilable(comp_level)) {
1043 return NULL;
1044 }
1045 } else {
1046 // osr compilation
1047 #ifndef TIERED
1048 // seems like an assert of dubious value
1049 assert(comp_level == CompLevel_highest_tier,
1050 "all OSR compiles are assumed to be at a single compilation level");
1051 #endif // TIERED
1052 // We accept a higher level osr method
1053 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1054 if (nm != NULL) return nm;
1055 if (method->is_not_osr_compilable(comp_level)) return NULL;
1056 }
1057
1058 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1059 // some prerequisites that are compiler specific
1060 if (comp->is_c2() || comp->is_shark()) {
1061 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1062 // Resolve all classes seen in the signature of the method
1063 // we are compiling.
1064 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1065 }
1066
1067 // If the method is native, do the lookup in the thread requesting
1068 // the compilation. Native lookups can load code, which is not
1069 // permitted during compilation.
1070 //
1071 // Note: A native method implies non-osr compilation which is
1072 // checked with an assertion at the entry of this method.
1073 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1074 bool in_base_library;
1075 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1076 if (HAS_PENDING_EXCEPTION) {
1077 // In case of an exception looking up the method, we just forget
1078 // about it. The interpreter will kick-in and throw the exception.
1079 method->set_not_compilable(); // implies is_not_osr_compilable()
1080 CLEAR_PENDING_EXCEPTION;
1081 return NULL;
1082 }
1083 assert(method->has_native_function(), "must have native code by now");
1084 }
1085
1086 // RedefineClasses() has replaced this method; just return
1087 if (method->is_old()) {
1088 return NULL;
1089 }
1090
1091 // JVMTI -- post_compile_event requires jmethod_id() that may require
1092 // a lock the compiling thread can not acquire. Prefetch it here.
1093 if (JvmtiExport::should_post_compiled_method_load()) {
1094 method->jmethod_id();
1095 }
1096
1097 // do the compilation
1098 if (method->is_native()) {
1099 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1100 // The following native methods:
1101 //
1102 // java.lang.Float.intBitsToFloat
1103 // java.lang.Float.floatToRawIntBits
1104 // java.lang.Double.longBitsToDouble
1105 // java.lang.Double.doubleToRawLongBits
1106 //
1107 // are called through the interpreter even if interpreter native stubs
1108 // are not preferred (i.e., calling through adapter handlers is preferred).
1109 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1110 // if the version of the methods from the native libraries is called.
1111 // As the interpreter and the C2-intrinsified version of the methods preserves
1112 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1113 if ((UseSSE >= 1 &&
1114 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1115 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1116 (UseSSE >= 2 &&
1117 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1118 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1119 return NULL;
1120 }
1121
1122 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1123 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1124 //
1125 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1126 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1127 AdapterHandlerLibrary::create_native_wrapper(method);
1128 } else {
1129 return NULL;
1130 }
1131 } else {
1132 // If the compiler is shut off due to code cache getting full
1133 // fail out now so blocking compiles dont hang the java thread
1134 if (!should_compile_new_jobs()) {
1135 CompilationPolicy::policy()->delay_compilation(method());
1136 return NULL;
1137 }
1138 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1139 }
1140
1141 // return requested nmethod
1142 // We accept a higher level osr method
1143 if (osr_bci == InvocationEntryBci) {
1144 return method->code();
1145 }
1146 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1147 }
1148
1149
1150 // ------------------------------------------------------------------
1151 // CompileBroker::compilation_is_complete
1152 //
1153 // See if compilation of this method is already complete.
1154 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1155 int osr_bci,
1156 int comp_level) {
1157 bool is_osr = (osr_bci != standard_entry_bci);
1158 if (is_osr) {
1159 if (method->is_not_osr_compilable(comp_level)) {
1160 return true;
1161 } else {
1162 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1163 return (result != NULL);
1164 }
1165 } else {
1166 if (method->is_not_compilable(comp_level)) {
1167 return true;
1168 } else {
1169 nmethod* result = method->code();
1170 if (result == NULL) return false;
1171 return comp_level == result->comp_level();
1172 }
1173 }
1174 }
1175
1176
1177 /**
1178 * See if this compilation is already requested.
1179 *
1180 * Implementation note: there is only a single "is in queue" bit
1181 * for each method. This means that the check below is overly
1182 * conservative in the sense that an osr compilation in the queue
1183 * will block a normal compilation from entering the queue (and vice
1184 * versa). This can be remedied by a full queue search to disambiguate
1185 * cases. If it is deemed profitable, this may be done.
1186 */
1187 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1188 return method->queued_for_compilation();
1189 }
1190
1191 // ------------------------------------------------------------------
1192 // CompileBroker::compilation_is_prohibited
1193 //
1194 // See if this compilation is not allowed.
1195 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level) {
1196 bool is_native = method->is_native();
1197 // Some compilers may not support the compilation of natives.
1198 AbstractCompiler *comp = compiler(comp_level);
1199 if (is_native &&
1200 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1201 method->set_not_compilable_quietly(comp_level);
1202 return true;
1203 }
1204
1205 bool is_osr = (osr_bci != standard_entry_bci);
1206 // Some compilers may not support on stack replacement.
1207 if (is_osr &&
1208 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1209 method->set_not_osr_compilable(comp_level);
1210 return true;
1211 }
1212
1213 // Breaking the abstraction - directives are only used inside a compilation otherwise.
1214 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1215 bool excluded = directive->ExcludeOption;
1216 DirectivesStack::release(directive);
1217
1218 // The method may be explicitly excluded by the user.
1219 double scale;
1220 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1221 bool quietly = CompilerOracle::should_exclude_quietly();
1222 if (PrintCompilation && !quietly) {
1223 // This does not happen quietly...
1224 ResourceMark rm;
1225 tty->print("### Excluding %s:%s",
1226 method->is_native() ? "generation of native wrapper" : "compile",
1227 (method->is_static() ? " static" : ""));
1228 method->print_short_name(tty);
1229 tty->cr();
1230 }
1231 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1232 }
1233
1234 return false;
1235 }
1236
1237 /**
1238 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1239 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1240 * The function also allows to generate separate compilation IDs for OSR compilations.
1241 */
1242 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1243 #ifdef ASSERT
1244 bool is_osr = (osr_bci != standard_entry_bci);
1245 int id;
1246 if (method->is_native()) {
1247 assert(!is_osr, "can't be osr");
1248 // Adapters, native wrappers and method handle intrinsics
1249 // should be generated always.
1250 return Atomic::add(1, &_compilation_id);
1251 } else if (CICountOSR && is_osr) {
1252 id = Atomic::add(1, &_osr_compilation_id);
1253 if (CIStartOSR <= id && id < CIStopOSR) {
1254 return id;
1255 }
1256 } else {
1257 id = Atomic::add(1, &_compilation_id);
1258 if (CIStart <= id && id < CIStop) {
1259 return id;
1260 }
1261 }
1262
1263 // Method was not in the appropriate compilation range.
1264 method->set_not_compilable_quietly();
1265 return 0;
1266 #else
1267 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1268 // only _compilation_id is incremented.
1269 return Atomic::add(1, &_compilation_id);
1270 #endif
1271 }
1272
1273 // ------------------------------------------------------------------
1274 // CompileBroker::assign_compile_id_unlocked
1275 //
1276 // Public wrapper for assign_compile_id that acquires the needed locks
1277 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1278 MutexLocker locker(MethodCompileQueue_lock, thread);
1279 return assign_compile_id(method, osr_bci);
1280 }
1281
1282 /**
1283 * Should the current thread block until this compilation request
1284 * has been fulfilled?
1285 */
1286 bool CompileBroker::is_compile_blocking() {
1287 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1288 return !BackgroundCompilation;
1289 }
1290
1291
1292 // ------------------------------------------------------------------
1293 // CompileBroker::preload_classes
1294 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1295 // Move this code over from c1_Compiler.cpp
1296 ShouldNotReachHere();
1297 }
1298
1299
1300 // ------------------------------------------------------------------
1301 // CompileBroker::create_compile_task
1302 //
1303 // Create a CompileTask object representing the current request for
1304 // compilation. Add this task to the queue.
1305 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1306 int compile_id,
1307 const methodHandle& method,
1308 int osr_bci,
1309 int comp_level,
1310 const methodHandle& hot_method,
1311 int hot_count,
1312 const char* comment,
1313 bool blocking) {
1314 CompileTask* new_task = CompileTask::allocate();
1315 new_task->initialize(compile_id, method, osr_bci, comp_level,
1316 hot_method, hot_count, comment,
1317 blocking);
1318 queue->add(new_task);
1319 return new_task;
1320 }
1321
1322 // 1 second should be long enough to complete most JVMCI compilations
1323 // and not too long to stall a blocking JVMCI compilation that
1324 // is trying to acquire a lock held by the app thread that submitted the
1325 // compilation.
1326 static const long BLOCKING_JVMCI_COMPILATION_TIMEOUT = 1000;
1327
1328 /**
1329 * Wait for the compilation task to complete.
1330 */
1331 void CompileBroker::wait_for_completion(CompileTask* task) {
1332 if (CIPrintCompileQueue) {
1333 ttyLocker ttyl;
1334 tty->print_cr("BLOCKING FOR COMPILE");
1335 }
1336
1337 assert(task->is_blocking(), "can only wait on blocking task");
1338
1339 JavaThread* thread = JavaThread::current();
1340 thread->set_blocked_on_compilation(true);
1341
1342 methodHandle method(thread, task->method());
1343 bool free_task;
1344 #if INCLUDE_JVMCI
1345 if (compiler(task->comp_level())->is_jvmci()) {
1346 MutexLocker waiter(task->lock(), thread);
1347 // No need to check if compilation has completed - just
1348 // rely on the time out. The JVMCI compiler thread will
1349 // recycle the CompileTask.
1350 task->lock()->wait(!Mutex::_no_safepoint_check_flag, BLOCKING_JVMCI_COMPILATION_TIMEOUT);
1351 // If the compilation completes while has_waiter is true then
1352 // this thread is responsible for freeing the task. Otherwise
1353 // the compiler thread will free the task.
1354 task->clear_waiter();
1355 free_task = task->is_complete();
1356 } else
1357 #endif
1358 {
1359 MutexLocker waiter(task->lock(), thread);
1360 free_task = true;
1361 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1362 task->lock()->wait();
1363 }
1364 }
1365
1366 thread->set_blocked_on_compilation(false);
1367 if (free_task) {
1368 if (is_compilation_disabled_forever()) {
1369 CompileTask::free(task);
1370 return;
1371 }
1372
1373 // It is harmless to check this status without the lock, because
1374 // completion is a stable property (until the task object is recycled).
1375 assert(task->is_complete(), "Compilation should have completed");
1376 assert(task->code_handle() == NULL, "must be reset");
1377
1378 // By convention, the waiter is responsible for recycling a
1379 // blocking CompileTask. Since there is only one waiter ever
1380 // waiting on a CompileTask, we know that no one else will
1381 // be using this CompileTask; we can free it.
1382 CompileTask::free(task);
1383 }
1384 }
1385
1386 /**
1387 * Initialize compiler thread(s) + compiler object(s). The postcondition
1388 * of this function is that the compiler runtimes are initialized and that
1389 * compiler threads can start compiling.
1390 */
1391 bool CompileBroker::init_compiler_runtime() {
1392 CompilerThread* thread = CompilerThread::current();
1393 AbstractCompiler* comp = thread->compiler();
1394 // Final sanity check - the compiler object must exist
1395 guarantee(comp != NULL, "Compiler object must exist");
1396
1397 int system_dictionary_modification_counter;
1398 {
1399 MutexLocker locker(Compile_lock, thread);
1400 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1401 }
1402
1403 {
1404 // Must switch to native to allocate ci_env
1405 ThreadToNativeFromVM ttn(thread);
1406 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1407 // Cache Jvmti state
1408 ci_env.cache_jvmti_state();
1409 // Cache DTrace flags
1410 ci_env.cache_dtrace_flags();
1411
1412 // Switch back to VM state to do compiler initialization
1413 ThreadInVMfromNative tv(thread);
1414 ResetNoHandleMark rnhm;
1415
1416 if (!comp->is_shark()) {
1417 // Perform per-thread and global initializations
1418 comp->initialize();
1419 }
1420 }
1421
1422 if (comp->is_failed()) {
1423 disable_compilation_forever();
1424 // If compiler initialization failed, no compiler thread that is specific to a
1425 // particular compiler runtime will ever start to compile methods.
1426 shutdown_compiler_runtime(comp, thread);
1427 return false;
1428 }
1429
1430 // C1 specific check
1431 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1432 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1433 return false;
1434 }
1435
1436 return true;
1437 }
1438
1439 /**
1440 * If C1 and/or C2 initialization failed, we shut down all compilation.
1441 * We do this to keep things simple. This can be changed if it ever turns
1442 * out to be a problem.
1443 */
1444 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1445 // Free buffer blob, if allocated
1446 if (thread->get_buffer_blob() != NULL) {
1447 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1448 CodeCache::free(thread->get_buffer_blob());
1449 }
1450
1451 if (comp->should_perform_shutdown()) {
1452 // There are two reasons for shutting down the compiler
1453 // 1) compiler runtime initialization failed
1454 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1455 warning("%s initialization failed. Shutting down all compilers", comp->name());
1456
1457 // Only one thread per compiler runtime object enters here
1458 // Set state to shut down
1459 comp->set_shut_down();
1460
1461 // Delete all queued compilation tasks to make compiler threads exit faster.
1462 if (_c1_compile_queue != NULL) {
1463 _c1_compile_queue->free_all();
1464 }
1465
1466 if (_c2_compile_queue != NULL) {
1467 _c2_compile_queue->free_all();
1468 }
1469
1470 // Set flags so that we continue execution with using interpreter only.
1471 UseCompiler = false;
1472 UseInterpreter = true;
1473
1474 // We could delete compiler runtimes also. However, there are references to
1475 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1476 // fail. This can be done later if necessary.
1477 }
1478 }
1479
1480 // ------------------------------------------------------------------
1481 // CompileBroker::compiler_thread_loop
1482 //
1483 // The main loop run by a CompilerThread.
1484 void CompileBroker::compiler_thread_loop() {
1485 CompilerThread* thread = CompilerThread::current();
1486 CompileQueue* queue = thread->queue();
1487 // For the thread that initializes the ciObjectFactory
1488 // this resource mark holds all the shared objects
1489 ResourceMark rm;
1490
1491 // First thread to get here will initialize the compiler interface
1492
1493 if (!ciObjectFactory::is_initialized()) {
1494 ASSERT_IN_VM;
1495 MutexLocker only_one (CompileThread_lock, thread);
1496 if (!ciObjectFactory::is_initialized()) {
1497 ciObjectFactory::initialize();
1498 }
1499 }
1500
1501 // Open a log.
1502 if (LogCompilation) {
1503 init_compiler_thread_log();
1504 }
1505 CompileLog* log = thread->log();
1506 if (log != NULL) {
1507 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1508 thread->name(),
1509 os::current_thread_id(),
1510 os::current_process_id());
1511 log->stamp();
1512 log->end_elem();
1513 }
1514
1515 // If compiler thread/runtime initialization fails, exit the compiler thread
1516 if (!init_compiler_runtime()) {
1517 return;
1518 }
1519
1520 // Poll for new compilation tasks as long as the JVM runs. Compilation
1521 // should only be disabled if something went wrong while initializing the
1522 // compiler runtimes. This, in turn, should not happen. The only known case
1523 // when compiler runtime initialization fails is if there is not enough free
1524 // space in the code cache to generate the necessary stubs, etc.
1525 while (!is_compilation_disabled_forever()) {
1526 // We need this HandleMark to avoid leaking VM handles.
1527 HandleMark hm(thread);
1528
1529 CompileTask* task = queue->get();
1530 if (task == NULL) {
1531 continue;
1532 }
1533
1534 // Give compiler threads an extra quanta. They tend to be bursty and
1535 // this helps the compiler to finish up the job.
1536 if (CompilerThreadHintNoPreempt) {
1537 os::hint_no_preempt();
1538 }
1539
1540 // Assign the task to the current thread. Mark this compilation
1541 // thread as active for the profiler.
1542 CompileTaskWrapper ctw(task);
1543 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1544 task->set_code_handle(&result_handle);
1545 methodHandle method(thread, task->method());
1546
1547 // Never compile a method if breakpoints are present in it
1548 if (method()->number_of_breakpoints() == 0) {
1549 // Compile the method.
1550 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1551 invoke_compiler_on_method(task);
1552 } else {
1553 // After compilation is disabled, remove remaining methods from queue
1554 method->clear_queued_for_compilation();
1555 task->set_failure_reason("compilation is disabled");
1556 }
1557 }
1558 }
1559
1560 // Shut down compiler runtime
1561 shutdown_compiler_runtime(thread->compiler(), thread);
1562 }
1563
1564 // ------------------------------------------------------------------
1565 // CompileBroker::init_compiler_thread_log
1566 //
1567 // Set up state required by +LogCompilation.
1568 void CompileBroker::init_compiler_thread_log() {
1569 CompilerThread* thread = CompilerThread::current();
1570 char file_name[4*K];
1571 FILE* fp = NULL;
1572 intx thread_id = os::current_thread_id();
1573 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1574 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1575 if (dir == NULL) {
1576 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1577 thread_id, os::current_process_id());
1578 } else {
1579 jio_snprintf(file_name, sizeof(file_name),
1580 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1581 os::file_separator(), thread_id, os::current_process_id());
1582 }
1583
1584 fp = fopen(file_name, "wt");
1585 if (fp != NULL) {
1586 if (LogCompilation && Verbose) {
1587 tty->print_cr("Opening compilation log %s", file_name);
1588 }
1589 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1590 thread->init_log(log);
1591
1592 if (xtty != NULL) {
1593 ttyLocker ttyl;
1594 // Record any per thread log files
1595 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1596 }
1597 return;
1598 }
1599 }
1600 warning("Cannot open log file: %s", file_name);
1601 }
1602
1603 void CompileBroker::log_metaspace_failure() {
1604 const char* message = "some methods may not be compiled because metaspace "
1605 "is out of memory";
1606 if (_compilation_log != NULL) {
1607 _compilation_log->log_metaspace_failure(message);
1608 }
1609 if (PrintCompilation) {
1610 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1611 }
1612 }
1613
1614
1615 // ------------------------------------------------------------------
1616 // CompileBroker::set_should_block
1617 //
1618 // Set _should_block.
1619 // Call this from the VM, with Threads_lock held and a safepoint requested.
1620 void CompileBroker::set_should_block() {
1621 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1622 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1623 #ifndef PRODUCT
1624 if (PrintCompilation && (Verbose || WizardMode))
1625 tty->print_cr("notifying compiler thread pool to block");
1626 #endif
1627 _should_block = true;
1628 }
1629
1630 // ------------------------------------------------------------------
1631 // CompileBroker::maybe_block
1632 //
1633 // Call this from the compiler at convenient points, to poll for _should_block.
1634 void CompileBroker::maybe_block() {
1635 if (_should_block) {
1636 #ifndef PRODUCT
1637 if (PrintCompilation && (Verbose || WizardMode))
1638 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1639 #endif
1640 ThreadInVMfromNative tivfn(JavaThread::current());
1641 }
1642 }
1643
1644 // wrapper for CodeCache::print_summary()
1645 static void codecache_print(bool detailed)
1646 {
1647 ResourceMark rm;
1648 stringStream s;
1649 // Dump code cache into a buffer before locking the tty,
1650 {
1651 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1652 CodeCache::print_summary(&s, detailed);
1653 }
1654 ttyLocker ttyl;
1655 tty->print("%s", s.as_string());
1656 }
1657
1658 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1659
1660 if (success) {
1661 task->mark_success();
1662 if (ci_env != NULL) {
1663 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1664 }
1665 if (_compilation_log != NULL) {
1666 nmethod* code = task->code();
1667 if (code != NULL) {
1668 _compilation_log->log_nmethod(thread, code);
1669 }
1670 }
1671 }
1672
1673 // simulate crash during compilation
1674 assert(task->compile_id() != CICrashAt, "just as planned");
1675 if (event.should_commit()) {
1676 event.set_method(task->method());
1677 event.set_compileID(task->compile_id());
1678 event.set_compileLevel(task->comp_level());
1679 event.set_succeded(task->is_success());
1680 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1681 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1682 event.set_inlinedBytes(task->num_inlined_bytecodes());
1683 event.commit();
1684 }
1685 }
1686
1687 int DirectivesStack::_depth = 0;
1688 CompilerDirectives* DirectivesStack::_top = NULL;
1689 CompilerDirectives* DirectivesStack::_bottom = NULL;
1690
1691 // ------------------------------------------------------------------
1692 // CompileBroker::invoke_compiler_on_method
1693 //
1694 // Compile a method.
1695 //
1696 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1697 if (PrintCompilation) {
1698 ResourceMark rm;
1699 task->print_tty();
1700 }
1701 elapsedTimer time;
1702
1703 CompilerThread* thread = CompilerThread::current();
1704 ResourceMark rm(thread);
1705
1706 if (LogEvents) {
1707 _compilation_log->log_compile(thread, task);
1708 }
1709
1710 // Common flags.
1711 uint compile_id = task->compile_id();
1712 int osr_bci = task->osr_bci();
1713 bool is_osr = (osr_bci != standard_entry_bci);
1714 bool should_log = (thread->log() != NULL);
1715 bool should_break = false;
1716 int task_level = task->comp_level();
1717
1718 DirectiveSet* directive;
1719 {
1720 // create the handle inside it's own block so it can't
1721 // accidentally be referenced once the thread transitions to
1722 // native. The NoHandleMark before the transition should catch
1723 // any cases where this occurs in the future.
1724 methodHandle method(thread, task->method());
1725 assert(!method->is_native(), "no longer compile natives");
1726
1727 // Look up matching directives
1728 directive = DirectivesStack::getMatchingDirective(method, compiler(task_level));
1729
1730 // Save information about this method in case of failure.
1731 set_last_compile(thread, method, is_osr, task_level);
1732
1733 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1734 }
1735
1736 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1737 if (should_log && !directive->LogOption) {
1738 should_log = false;
1739 }
1740
1741 // Allocate a new set of JNI handles.
1742 push_jni_handle_block();
1743 Method* target_handle = task->method();
1744 int compilable = ciEnv::MethodCompilable;
1745 AbstractCompiler *comp = compiler(task_level);
1746
1747 int system_dictionary_modification_counter;
1748 {
1749 MutexLocker locker(Compile_lock, thread);
1750 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1751 }
1752 #if INCLUDE_JVMCI
1753 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1754 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1755
1756 TraceTime t1("compilation", &time);
1757 EventCompilation event;
1758
1759 JVMCIEnv env(task, system_dictionary_modification_counter);
1760 methodHandle method(thread, target_handle);
1761 jvmci->compile_method(method, osr_bci, &env);
1762
1763 post_compile(thread, task, event, task->code() != NULL, NULL);
1764 } else
1765 #endif // INCLUDE_JVMCI
1766 {
1767
1768 NoHandleMark nhm;
1769 ThreadToNativeFromVM ttn(thread);
1770
1771 ciEnv ci_env(task, system_dictionary_modification_counter);
1772 if (should_break) {
1773 ci_env.set_break_at_compile(true);
1774 }
1775 if (should_log) {
1776 ci_env.set_log(thread->log());
1777 }
1778 assert(thread->env() == &ci_env, "set by ci_env");
1779 // The thread-env() field is cleared in ~CompileTaskWrapper.
1780
1781 // Cache Jvmti state
1782 ci_env.cache_jvmti_state();
1783
1784 // Cache DTrace flags
1785 ci_env.cache_dtrace_flags();
1786
1787 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1788
1789 TraceTime t1("compilation", &time);
1790 EventCompilation event;
1791
1792 if (comp == NULL) {
1793 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1794 } else {
1795 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1796 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1797 while (WhiteBox::compilation_locked) {
1798 locker.wait(Mutex::_no_safepoint_check_flag);
1799 }
1800 }
1801 comp->compile_method(&ci_env, target, osr_bci, directive);
1802 }
1803
1804 if (!ci_env.failing() && task->code() == NULL) {
1805 //assert(false, "compiler should always document failure");
1806 // The compiler elected, without comment, not to register a result.
1807 // Do not attempt further compilations of this method.
1808 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1809 }
1810
1811 // Copy this bit to the enclosing block:
1812 compilable = ci_env.compilable();
1813
1814 if (ci_env.failing()) {
1815 task->set_failure_reason(ci_env.failure_reason());
1816 ci_env.report_failure(ci_env.failure_reason());
1817 const char* retry_message = ci_env.retry_message();
1818 if (_compilation_log != NULL) {
1819 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1820 }
1821 if (PrintCompilation) {
1822 FormatBufferResource msg = retry_message != NULL ?
1823 FormatBufferResource("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1824 FormatBufferResource("COMPILE SKIPPED: %s", ci_env.failure_reason());
1825 task->print(tty, msg);
1826 }
1827 }
1828
1829 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1830 }
1831 DirectivesStack::release(directive);
1832 pop_jni_handle_block();
1833
1834 methodHandle method(thread, task->method());
1835
1836 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1837
1838 collect_statistics(thread, time, task);
1839
1840 if (PrintCompilation && PrintCompilation2) {
1841 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1842 tty->print("%4d ", compile_id); // print compilation number
1843 tty->print("%s ", (is_osr ? "%" : " "));
1844 if (task->code() != NULL) {
1845 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1846 }
1847 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1848 }
1849
1850 if (PrintCodeCacheOnCompilation)
1851 codecache_print(/* detailed= */ false);
1852
1853 // Disable compilation, if required.
1854 switch (compilable) {
1855 case ciEnv::MethodCompilable_never:
1856 if (is_osr)
1857 method->set_not_osr_compilable_quietly();
1858 else
1859 method->set_not_compilable_quietly();
1860 break;
1861 case ciEnv::MethodCompilable_not_at_tier:
1862 if (is_osr)
1863 method->set_not_osr_compilable_quietly(task_level);
1864 else
1865 method->set_not_compilable_quietly(task_level);
1866 break;
1867 }
1868
1869 // Note that the queued_for_compilation bits are cleared without
1870 // protection of a mutex. [They were set by the requester thread,
1871 // when adding the task to the compile queue -- at which time the
1872 // compile queue lock was held. Subsequently, we acquired the compile
1873 // queue lock to get this task off the compile queue; thus (to belabour
1874 // the point somewhat) our clearing of the bits must be occurring
1875 // only after the setting of the bits. See also 14012000 above.
1876 method->clear_queued_for_compilation();
1877
1878 #ifdef ASSERT
1879 if (CollectedHeap::fired_fake_oom()) {
1880 // The current compile received a fake OOM during compilation so
1881 // go ahead and exit the VM since the test apparently succeeded
1882 tty->print_cr("*** Shutting down VM after successful fake OOM");
1883 vm_exit(0);
1884 }
1885 #endif
1886 }
1887
1888 /**
1889 * The CodeCache is full. Print warning and disable compilation.
1890 * Schedule code cache cleaning so compilation can continue later.
1891 * This function needs to be called only from CodeCache::allocate(),
1892 * since we currently handle a full code cache uniformly.
1893 */
1894 void CompileBroker::handle_full_code_cache(int code_blob_type) {
1895 UseInterpreter = true;
1896 if (UseCompiler || AlwaysCompileLoopMethods ) {
1897 if (xtty != NULL) {
1898 ResourceMark rm;
1899 stringStream s;
1900 // Dump code cache state into a buffer before locking the tty,
1901 // because log_state() will use locks causing lock conflicts.
1902 CodeCache::log_state(&s);
1903 // Lock to prevent tearing
1904 ttyLocker ttyl;
1905 xtty->begin_elem("code_cache_full");
1906 xtty->print("%s", s.as_string());
1907 xtty->stamp();
1908 xtty->end_elem();
1909 }
1910
1911 #ifndef PRODUCT
1912 if (CompileTheWorld || ExitOnFullCodeCache) {
1913 codecache_print(/* detailed= */ true);
1914 before_exit(JavaThread::current());
1915 exit_globals(); // will delete tty
1916 vm_direct_exit(CompileTheWorld ? 0 : 1);
1917 }
1918 #endif
1919 if (UseCodeCacheFlushing) {
1920 // Since code cache is full, immediately stop new compiles
1921 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
1922 NMethodSweeper::log_sweep("disable_compiler");
1923 }
1924 } else {
1925 disable_compilation_forever();
1926 }
1927
1928 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
1929 }
1930 }
1931
1932 // ------------------------------------------------------------------
1933 // CompileBroker::set_last_compile
1934 //
1935 // Record this compilation for debugging purposes.
1936 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
1937 ResourceMark rm;
1938 char* method_name = method->name()->as_C_string();
1939 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1940 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
1941 char current_method[CompilerCounters::cmname_buffer_length];
1942 size_t maxLen = CompilerCounters::cmname_buffer_length;
1943
1944 if (UsePerfData) {
1945 const char* class_name = method->method_holder()->name()->as_C_string();
1946
1947 size_t s1len = strlen(class_name);
1948 size_t s2len = strlen(method_name);
1949
1950 // check if we need to truncate the string
1951 if (s1len + s2len + 2 > maxLen) {
1952
1953 // the strategy is to lop off the leading characters of the
1954 // class name and the trailing characters of the method name.
1955
1956 if (s2len + 2 > maxLen) {
1957 // lop of the entire class name string, let snprintf handle
1958 // truncation of the method name.
1959 class_name += s1len; // null string
1960 }
1961 else {
1962 // lop off the extra characters from the front of the class name
1963 class_name += ((s1len + s2len + 2) - maxLen);
1964 }
1965 }
1966
1967 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1968 }
1969
1970 if (CICountOSR && is_osr) {
1971 _last_compile_type = osr_compile;
1972 } else {
1973 _last_compile_type = normal_compile;
1974 }
1975 _last_compile_level = comp_level;
1976
1977 if (UsePerfData) {
1978 CompilerCounters* counters = thread->counters();
1979 counters->set_current_method(current_method);
1980 counters->set_compile_type((jlong)_last_compile_type);
1981 }
1982 }
1983
1984
1985 // ------------------------------------------------------------------
1986 // CompileBroker::push_jni_handle_block
1987 //
1988 // Push on a new block of JNI handles.
1989 void CompileBroker::push_jni_handle_block() {
1990 JavaThread* thread = JavaThread::current();
1991
1992 // Allocate a new block for JNI handles.
1993 // Inlined code from jni_PushLocalFrame()
1994 JNIHandleBlock* java_handles = thread->active_handles();
1995 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1996 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1997 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1998 thread->set_active_handles(compile_handles);
1999 }
2000
2001
2002 // ------------------------------------------------------------------
2003 // CompileBroker::pop_jni_handle_block
2004 //
2005 // Pop off the current block of JNI handles.
2006 void CompileBroker::pop_jni_handle_block() {
2007 JavaThread* thread = JavaThread::current();
2008
2009 // Release our JNI handle block
2010 JNIHandleBlock* compile_handles = thread->active_handles();
2011 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2012 thread->set_active_handles(java_handles);
2013 compile_handles->set_pop_frame_link(NULL);
2014 JNIHandleBlock::release_block(compile_handles, thread); // may block
2015 }
2016
2017 // ------------------------------------------------------------------
2018 // CompileBroker::collect_statistics
2019 //
2020 // Collect statistics about the compilation.
2021
2022 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2023 bool success = task->is_success();
2024 methodHandle method (thread, task->method());
2025 uint compile_id = task->compile_id();
2026 bool is_osr = (task->osr_bci() != standard_entry_bci);
2027 nmethod* code = task->code();
2028 CompilerCounters* counters = thread->counters();
2029
2030 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2031 MutexLocker locker(CompileStatistics_lock);
2032
2033 // _perf variables are production performance counters which are
2034 // updated regardless of the setting of the CITime and CITimeEach flags
2035 //
2036
2037 // account all time, including bailouts and failures in this counter;
2038 // C1 and C2 counters are counting both successful and unsuccessful compiles
2039 _t_total_compilation.add(time);
2040
2041 if (!success) {
2042 _total_bailout_count++;
2043 if (UsePerfData) {
2044 _perf_last_failed_method->set_value(counters->current_method());
2045 _perf_last_failed_type->set_value(counters->compile_type());
2046 _perf_total_bailout_count->inc();
2047 }
2048 _t_bailedout_compilation.add(time);
2049 } else if (code == NULL) {
2050 if (UsePerfData) {
2051 _perf_last_invalidated_method->set_value(counters->current_method());
2052 _perf_last_invalidated_type->set_value(counters->compile_type());
2053 _perf_total_invalidated_count->inc();
2054 }
2055 _total_invalidated_count++;
2056 _t_invalidated_compilation.add(time);
2057 } else {
2058 // Compilation succeeded
2059
2060 // update compilation ticks - used by the implementation of
2061 // java.lang.management.CompilationMBean
2062 _perf_total_compilation->inc(time.ticks());
2063 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2064
2065 if (CITime) {
2066 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2067 JVMCI_ONLY(CompilerStatistics* stats = compiler(task->comp_level())->stats();)
2068 if (is_osr) {
2069 _t_osr_compilation.add(time);
2070 _sum_osr_bytes_compiled += bytes_compiled;
2071 JVMCI_ONLY(stats->_osr.update(time, bytes_compiled);)
2072 } else {
2073 _t_standard_compilation.add(time);
2074 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2075 JVMCI_ONLY(stats->_standard.update(time, bytes_compiled);)
2076 }
2077 JVMCI_ONLY(stats->_nmethods_size += code->total_size();)
2078 JVMCI_ONLY(stats->_nmethods_code_size += code->insts_size();)
2079 }
2080
2081 if (UsePerfData) {
2082 // save the name of the last method compiled
2083 _perf_last_method->set_value(counters->current_method());
2084 _perf_last_compile_type->set_value(counters->compile_type());
2085 _perf_last_compile_size->set_value(method->code_size() +
2086 task->num_inlined_bytecodes());
2087 if (is_osr) {
2088 _perf_osr_compilation->inc(time.ticks());
2089 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2090 } else {
2091 _perf_standard_compilation->inc(time.ticks());
2092 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2093 }
2094 }
2095
2096 if (CITimeEach) {
2097 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2098 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2099 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2100 }
2101
2102 // Collect counts of successful compilations
2103 _sum_nmethod_size += code->total_size();
2104 _sum_nmethod_code_size += code->insts_size();
2105 _total_compile_count++;
2106
2107 if (UsePerfData) {
2108 _perf_sum_nmethod_size->inc( code->total_size());
2109 _perf_sum_nmethod_code_size->inc(code->insts_size());
2110 _perf_total_compile_count->inc();
2111 }
2112
2113 if (is_osr) {
2114 if (UsePerfData) _perf_total_osr_compile_count->inc();
2115 _total_osr_compile_count++;
2116 } else {
2117 if (UsePerfData) _perf_total_standard_compile_count->inc();
2118 _total_standard_compile_count++;
2119 }
2120 }
2121 // set the current method for the thread to null
2122 if (UsePerfData) counters->set_current_method("");
2123 }
2124
2125 const char* CompileBroker::compiler_name(int comp_level) {
2126 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2127 if (comp == NULL) {
2128 return "no compiler";
2129 } else {
2130 return (comp->name());
2131 }
2132 }
2133
2134 #if INCLUDE_JVMCI
2135 void CompileBroker::print_times(AbstractCompiler* comp) {
2136 CompilerStatistics* stats = comp->stats();
2137 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}",
2138 comp->name(), stats->bytes_per_second(),
2139 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2140 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2141 stats->_nmethods_size, stats->_nmethods_code_size);
2142 comp->print_timers();
2143 }
2144 #endif // INCLUDE_JVMCI
2145
2146 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2147 #if INCLUDE_JVMCI
2148 elapsedTimer standard_compilation;
2149 elapsedTimer total_compilation;
2150 elapsedTimer osr_compilation;
2151
2152 int standard_bytes_compiled = 0;
2153 int osr_bytes_compiled = 0;
2154
2155 int standard_compile_count = 0;
2156 int osr_compile_count = 0;
2157 int total_compile_count = 0;
2158
2159 int nmethods_size = 0;
2160 int nmethods_code_size = 0;
2161 bool printedHeader = false;
2162
2163 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2164 AbstractCompiler* comp = _compilers[i];
2165 if (comp != NULL) {
2166 if (per_compiler && aggregate && !printedHeader) {
2167 printedHeader = true;
2168 tty->cr();
2169 tty->print_cr("Individual compiler times (for compiled methods only)");
2170 tty->print_cr("------------------------------------------------");
2171 tty->cr();
2172 }
2173 CompilerStatistics* stats = comp->stats();
2174
2175 standard_compilation.add(stats->_standard._time);
2176 osr_compilation.add(stats->_osr._time);
2177
2178 standard_bytes_compiled += stats->_standard._bytes;
2179 osr_bytes_compiled += stats->_osr._bytes;
2180
2181 standard_compile_count += stats->_standard._count;
2182 osr_compile_count += stats->_osr._count;
2183
2184 nmethods_size += stats->_nmethods_size;
2185 nmethods_code_size += stats->_nmethods_code_size;
2186
2187 if (per_compiler) {
2188 print_times(comp);
2189 }
2190 }
2191 }
2192 total_compile_count = osr_compile_count + standard_compile_count;
2193 total_compilation.add(osr_compilation);
2194 total_compilation.add(standard_compilation);
2195
2196 // In hosted mode, print the JVMCI compiler specific counters manually.
2197 if (!UseJVMCICompiler) {
2198 JVMCICompiler::print_compilation_timers();
2199 }
2200 #else // INCLUDE_JVMCI
2201 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2202 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2203 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2204
2205 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2206 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2207
2208 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2209 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2210 int total_compile_count = CompileBroker::_total_compile_count;
2211
2212 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2213 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2214 #endif // INCLUDE_JVMCI
2215
2216 if (!aggregate) {
2217 return;
2218 }
2219 tty->cr();
2220 tty->print_cr("Accumulated compiler times");
2221 tty->print_cr("----------------------------------------------------------");
2222 //0000000000111111111122222222223333333333444444444455555555556666666666
2223 //0123456789012345678901234567890123456789012345678901234567890123456789
2224 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2225 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2226 standard_compilation.seconds(),
2227 standard_compilation.seconds() / standard_compile_count);
2228 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2229 CompileBroker::_t_bailedout_compilation.seconds(),
2230 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2231 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2232 osr_compilation.seconds(),
2233 osr_compilation.seconds() / osr_compile_count);
2234 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2235 CompileBroker::_t_invalidated_compilation.seconds(),
2236 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2237
2238 AbstractCompiler *comp = compiler(CompLevel_simple);
2239 if (comp != NULL) {
2240 tty->cr();
2241 comp->print_timers();
2242 }
2243 comp = compiler(CompLevel_full_optimization);
2244 if (comp != NULL) {
2245 tty->cr();
2246 comp->print_timers();
2247 }
2248 tty->cr();
2249 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2250 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2251 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2252 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2253 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2254 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2255 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2256 double tcs = total_compilation.seconds();
2257 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2258 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2259 tty->cr();
2260 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2261 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2262 }
2263
2264 // Debugging output for failure
2265 void CompileBroker::print_last_compile() {
2266 if ( _last_compile_level != CompLevel_none &&
2267 compiler(_last_compile_level) != NULL &&
2268 _last_method_compiled != NULL &&
2269 _last_compile_type != no_compile) {
2270 if (_last_compile_type == osr_compile) {
2271 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2272 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2273 } else {
2274 tty->print_cr("Last parse: %d+++(%d) %s",
2275 _compilation_id, _last_compile_level, _last_method_compiled);
2276 }
2277 }
2278 }
2279
2280
2281 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2282 #ifndef PRODUCT
2283 st->print_cr("Compiler thread printing unimplemented.");
2284 st->cr();
2285 #endif
2286 }