1 /*
2 * Copyright (c) 1999, 2018, 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 "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/compileLog.hpp"
35 #include "compiler/compilerOracle.hpp"
36 #include "compiler/directivesParser.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "oops/methodData.hpp"
43 #include "oops/method.inline.hpp"
44 #include "oops/oop.inline.hpp"
45 #include "prims/nativeLookup.hpp"
46 #include "prims/whitebox.hpp"
47 #include "runtime/arguments.hpp"
48 #include "runtime/atomic.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/init.hpp"
51 #include "runtime/interfaceSupport.inline.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/jniHandles.inline.hpp"
54 #include "runtime/os.hpp"
55 #include "runtime/safepointVerifiers.hpp"
56 #include "runtime/sharedRuntime.hpp"
57 #include "runtime/sweeper.hpp"
58 #include "runtime/timerTrace.hpp"
59 #include "runtime/vframe.inline.hpp"
60 #include "trace/tracing.hpp"
61 #include "utilities/debug.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/formatBuffer.hpp"
65 #ifdef COMPILER1
66 #include "c1/c1_Compiler.hpp"
67 #endif
68 #if INCLUDE_JVMCI
69 #include "jvmci/jvmciCompiler.hpp"
70 #include "jvmci/jvmciRuntime.hpp"
71 #include "jvmci/jvmciJavaClasses.hpp"
72 #include "runtime/vframe.hpp"
73 #endif
74 #ifdef COMPILER2
75 #include "opto/c2compiler.hpp"
76 #endif
77
78 #ifdef DTRACE_ENABLED
79
80 // Only bother with this argument setup if dtrace is available
81
82 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
83 { \
84 Symbol* klass_name = (method)->klass_name(); \
85 Symbol* name = (method)->name(); \
86 Symbol* signature = (method)->signature(); \
87 HOTSPOT_METHOD_COMPILE_BEGIN( \
88 (char *) comp_name, strlen(comp_name), \
89 (char *) klass_name->bytes(), klass_name->utf8_length(), \
90 (char *) name->bytes(), name->utf8_length(), \
91 (char *) signature->bytes(), signature->utf8_length()); \
92 }
93
94 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
95 { \
96 Symbol* klass_name = (method)->klass_name(); \
97 Symbol* name = (method)->name(); \
98 Symbol* signature = (method)->signature(); \
99 HOTSPOT_METHOD_COMPILE_END( \
100 (char *) comp_name, strlen(comp_name), \
101 (char *) klass_name->bytes(), klass_name->utf8_length(), \
102 (char *) name->bytes(), name->utf8_length(), \
103 (char *) signature->bytes(), signature->utf8_length(), (success)); \
104 }
105
106 #else // ndef DTRACE_ENABLED
107
108 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
109 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
110
111 #endif // ndef DTRACE_ENABLED
112
113 bool CompileBroker::_initialized = false;
114 volatile bool CompileBroker::_should_block = false;
115 volatile int CompileBroker::_print_compilation_warning = 0;
116 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
117
118 // The installed compiler(s)
119 AbstractCompiler* CompileBroker::_compilers[2];
120
121 // The maximum numbers of compiler threads to be determined during startup.
122 int CompileBroker::_c1_count = 0;
123 int CompileBroker::_c2_count = 0;
124
125 // An array of compiler names as Java String objects
126 jobject* CompileBroker::_compiler1_objects = NULL;
127 jobject* CompileBroker::_compiler2_objects = NULL;
128
129 CompileLog** CompileBroker::_compiler1_logs = NULL;
130 CompileLog** CompileBroker::_compiler2_logs = NULL;
131
132 // These counters are used to assign an unique ID to each compilation.
133 volatile jint CompileBroker::_compilation_id = 0;
134 volatile jint CompileBroker::_osr_compilation_id = 0;
135
136 // Debugging information
137 int CompileBroker::_last_compile_type = no_compile;
138 int CompileBroker::_last_compile_level = CompLevel_none;
139 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
140
141 // Performance counters
142 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
143 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
144 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
145
146 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
147 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
148 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
151
152 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
153 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
154 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
155 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
156
157 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
158 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
159 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
160 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
161 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
162 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
163 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
164
165 // Timers and counters for generating statistics
166 elapsedTimer CompileBroker::_t_total_compilation;
167 elapsedTimer CompileBroker::_t_osr_compilation;
168 elapsedTimer CompileBroker::_t_standard_compilation;
169 elapsedTimer CompileBroker::_t_invalidated_compilation;
170 elapsedTimer CompileBroker::_t_bailedout_compilation;
171
172 int CompileBroker::_total_bailout_count = 0;
173 int CompileBroker::_total_invalidated_count = 0;
174 int CompileBroker::_total_compile_count = 0;
175 int CompileBroker::_total_osr_compile_count = 0;
176 int CompileBroker::_total_standard_compile_count = 0;
177
178 int CompileBroker::_sum_osr_bytes_compiled = 0;
179 int CompileBroker::_sum_standard_bytes_compiled = 0;
180 int CompileBroker::_sum_nmethod_size = 0;
181 int CompileBroker::_sum_nmethod_code_size = 0;
182
183 long CompileBroker::_peak_compilation_time = 0;
184
185 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
186 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
187
188
189
190 class CompilationLog : public StringEventLog {
191 public:
192 CompilationLog() : StringEventLog("Compilation events") {
193 }
194
195 void log_compile(JavaThread* thread, CompileTask* task) {
196 StringLogMessage lm;
197 stringStream sstr = lm.stream();
198 // msg.time_stamp().update_to(tty->time_stamp().ticks());
199 task->print(&sstr, NULL, true, false);
200 log(thread, "%s", (const char*)lm);
201 }
202
203 void log_nmethod(JavaThread* thread, nmethod* nm) {
204 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
205 nm->compile_id(), nm->is_osr_method() ? "%" : "",
206 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
207 }
208
209 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
210 StringLogMessage lm;
211 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
212 if (retry_message != NULL) {
213 lm.append(" (%s)", retry_message);
214 }
215 lm.print("\n");
216 log(thread, "%s", (const char*)lm);
217 }
218
219 void log_metaspace_failure(const char* reason) {
220 ResourceMark rm;
221 StringLogMessage lm;
222 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
223 lm.print("\n");
224 log(JavaThread::current(), "%s", (const char*)lm);
225 }
226 };
227
228 static CompilationLog* _compilation_log = NULL;
229
230 bool compileBroker_init() {
231 if (LogEvents) {
232 _compilation_log = new CompilationLog();
233 }
234
235 // init directives stack, adding default directive
236 DirectivesStack::init();
237
238 if (DirectivesParser::has_file()) {
239 return DirectivesParser::parse_from_flag();
240 } else if (CompilerDirectivesPrint) {
241 // Print default directive even when no other was added
242 DirectivesStack::print(tty);
243 }
244
245 return true;
246 }
247
248 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
249 CompilerThread* thread = CompilerThread::current();
250 thread->set_task(task);
251 #if INCLUDE_JVMCI
252 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
253 task->set_jvmci_compiler_thread(thread);
254 }
255 #endif
256 CompileLog* log = thread->log();
257 if (log != NULL) task->log_task_start(log);
258 }
259
260 CompileTaskWrapper::~CompileTaskWrapper() {
261 CompilerThread* thread = CompilerThread::current();
262 CompileTask* task = thread->task();
263 CompileLog* log = thread->log();
264 if (log != NULL) task->log_task_done(log);
265 thread->set_task(NULL);
266 task->set_code_handle(NULL);
267 thread->set_env(NULL);
268 if (task->is_blocking()) {
269 bool free_task = false;
270 {
271 MutexLocker notifier(task->lock(), thread);
272 task->mark_complete();
273 #if INCLUDE_JVMCI
274 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
275 if (!task->has_waiter()) {
276 // The waiting thread timed out and thus did not free the task.
277 free_task = true;
278 }
279 task->set_jvmci_compiler_thread(NULL);
280 }
281 #endif
282 if (!free_task) {
283 // Notify the waiting thread that the compilation has completed
284 // so that it can free the task.
285 task->lock()->notify_all();
286 }
287 }
288 if (free_task) {
289 // The task can only be freed once the task lock is released.
290 CompileTask::free(task);
291 }
292 } else {
293 task->mark_complete();
294
295 // By convention, the compiling thread is responsible for
296 // recycling a non-blocking CompileTask.
297 CompileTask::free(task);
298 }
299 }
300
301 /**
302 * Check if a CompilerThread can be removed and update count if requested.
303 */
304 static bool can_remove(CompilerThread *ct, bool do_it) {
305 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
306 AbstractCompiler *compiler = ct->compiler();
307 int compiler_count = compiler->num_compiler_threads();
308 // Keep at least 1 compiler thread of each type.
309 if (compiler_count < 2) return false;
310 // Keep alive for at least some time.
311 if (ct->idle_time_millis() < 500) return false;
312
313 // We only allow the last compiler thread of each type to get removed.
314 jobject last_compiler = (compiler->is_c1()) ? CompileBroker::compiler1_object(compiler_count - 1)
315 : CompileBroker::compiler2_object(compiler_count - 1);
316 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
317 if (do_it) {
318 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
319 compiler->set_num_compiler_threads(compiler_count - 1);
320 }
321 return true;
322 }
323 return false;
324 }
325
326 /**
327 * Add a CompileTask to a CompileQueue.
328 */
329 void CompileQueue::add(CompileTask* task) {
330 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
331
332 task->set_next(NULL);
333 task->set_prev(NULL);
334
335 if (_last == NULL) {
336 // The compile queue is empty.
337 assert(_first == NULL, "queue is empty");
338 _first = task;
339 _last = task;
340 } else {
341 // Append the task to the queue.
342 assert(_last->next() == NULL, "not last");
343 _last->set_next(task);
344 task->set_prev(_last);
345 _last = task;
346 }
347 ++_size;
348
349 // Mark the method as being in the compile queue.
350 task->method()->set_queued_for_compilation();
351
352 if (CIPrintCompileQueue) {
353 print_tty();
354 }
355
356 if (LogCompilation && xtty != NULL) {
357 task->log_task_queued();
358 }
359
360 // Notify CompilerThreads that a task is available.
361 MethodCompileQueue_lock->notify_all();
362 }
363
364 /**
365 * Empties compilation queue by putting all compilation tasks onto
366 * a freelist. Furthermore, the method wakes up all threads that are
367 * waiting on a compilation task to finish. This can happen if background
368 * compilation is disabled.
369 */
370 void CompileQueue::free_all() {
371 MutexLocker mu(MethodCompileQueue_lock);
372 CompileTask* next = _first;
373
374 // Iterate over all tasks in the compile queue
375 while (next != NULL) {
376 CompileTask* current = next;
377 next = current->next();
378 {
379 // Wake up thread that blocks on the compile task.
380 MutexLocker ct_lock(current->lock());
381 current->lock()->notify();
382 }
383 // Put the task back on the freelist.
384 CompileTask::free(current);
385 }
386 _first = NULL;
387
388 // Wake up all threads that block on the queue.
389 MethodCompileQueue_lock->notify_all();
390 }
391
392 /**
393 * Get the next CompileTask from a CompileQueue
394 */
395 CompileTask* CompileQueue::get() {
396 // save methods from RedefineClasses across safepoint
397 // across MethodCompileQueue_lock below.
398 methodHandle save_method;
399 methodHandle save_hot_method;
400
401 MutexLocker locker(MethodCompileQueue_lock);
402 // If _first is NULL we have no more compile jobs. There are two reasons for
403 // having no compile jobs: First, we compiled everything we wanted. Second,
404 // we ran out of code cache so compilation has been disabled. In the latter
405 // case we perform code cache sweeps to free memory such that we can re-enable
406 // compilation.
407 while (_first == NULL) {
408 // Exit loop if compilation is disabled forever
409 if (CompileBroker::is_compilation_disabled_forever()) {
410 return NULL;
411 }
412
413 // If there are no compilation tasks and we can compile new jobs
414 // (i.e., there is enough free space in the code cache) there is
415 // no need to invoke the sweeper. As a result, the hotness of methods
416 // remains unchanged. This behavior is desired, since we want to keep
417 // the stable state, i.e., we do not want to evict methods from the
418 // code cache if it is unnecessary.
419 // We need a timed wait here, since compiler threads can exit if compilation
420 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
421 // is not critical and we do not want idle compiler threads to wake up too often.
422 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
423
424 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
425 // Still nothing to compile. Give caller a chance to stop this thread.
426 if (can_remove(CompilerThread::current(), false)) return NULL;
427 }
428 }
429
430 if (CompileBroker::is_compilation_disabled_forever()) {
431 return NULL;
432 }
433
434 CompileTask* task;
435 {
436 NoSafepointVerifier nsv;
437 task = CompilationPolicy::policy()->select_task(this);
438 }
439
440 if (task != NULL) {
441 // Save method pointers across unlock safepoint. The task is removed from
442 // the compilation queue, which is walked during RedefineClasses.
443 save_method = methodHandle(task->method());
444 save_hot_method = methodHandle(task->hot_method());
445
446 remove(task);
447 purge_stale_tasks(); // may temporarily release MCQ lock
448 }
449
450 return task;
451 }
452
453 // Clean & deallocate stale compile tasks.
454 // Temporarily releases MethodCompileQueue lock.
455 void CompileQueue::purge_stale_tasks() {
456 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
457 if (_first_stale != NULL) {
458 // Stale tasks are purged when MCQ lock is released,
459 // but _first_stale updates are protected by MCQ lock.
460 // Once task processing starts and MCQ lock is released,
461 // other compiler threads can reuse _first_stale.
462 CompileTask* head = _first_stale;
463 _first_stale = NULL;
464 {
465 MutexUnlocker ul(MethodCompileQueue_lock);
466 for (CompileTask* task = head; task != NULL; ) {
467 CompileTask* next_task = task->next();
468 CompileTaskWrapper ctw(task); // Frees the task
469 task->set_failure_reason("stale task");
470 task = next_task;
471 }
472 }
473 }
474 }
475
476 void CompileQueue::remove(CompileTask* task) {
477 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
478 if (task->prev() != NULL) {
479 task->prev()->set_next(task->next());
480 } else {
481 // max is the first element
482 assert(task == _first, "Sanity");
483 _first = task->next();
484 }
485
486 if (task->next() != NULL) {
487 task->next()->set_prev(task->prev());
488 } else {
489 // max is the last element
490 assert(task == _last, "Sanity");
491 _last = task->prev();
492 }
493 --_size;
494 }
495
496 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
497 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
498 remove(task);
499
500 // Enqueue the task for reclamation (should be done outside MCQ lock)
501 task->set_next(_first_stale);
502 task->set_prev(NULL);
503 _first_stale = task;
504 }
505
506 // methods in the compile queue need to be marked as used on the stack
507 // so that they don't get reclaimed by Redefine Classes
508 void CompileQueue::mark_on_stack() {
509 CompileTask* task = _first;
510 while (task != NULL) {
511 task->mark_on_stack();
512 task = task->next();
513 }
514 }
515
516
517 CompileQueue* CompileBroker::compile_queue(int comp_level) {
518 if (is_c2_compile(comp_level)) return _c2_compile_queue;
519 if (is_c1_compile(comp_level)) return _c1_compile_queue;
520 return NULL;
521 }
522
523 void CompileBroker::print_compile_queues(outputStream* st) {
524 st->print_cr("Current compiles: ");
525 MutexLocker locker(MethodCompileQueue_lock);
526
527 char buf[2000];
528 int buflen = sizeof(buf);
529 Threads::print_threads_compiling(st, buf, buflen);
530
531 st->cr();
532 if (_c1_compile_queue != NULL) {
533 _c1_compile_queue->print(st);
534 }
535 if (_c2_compile_queue != NULL) {
536 _c2_compile_queue->print(st);
537 }
538 }
539
540 void CompileQueue::print(outputStream* st) {
541 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
542 st->print_cr("%s:", name());
543 CompileTask* task = _first;
544 if (task == NULL) {
545 st->print_cr("Empty");
546 } else {
547 while (task != NULL) {
548 task->print(st, NULL, true, true);
549 task = task->next();
550 }
551 }
552 st->cr();
553 }
554
555 void CompileQueue::print_tty() {
556 ttyLocker ttyl;
557 print(tty);
558 }
559
560 CompilerCounters::CompilerCounters() {
561 _current_method[0] = '\0';
562 _compile_type = CompileBroker::no_compile;
563 }
564
565 // ------------------------------------------------------------------
566 // CompileBroker::compilation_init
567 //
568 // Initialize the Compilation object
569 void CompileBroker::compilation_init_phase1(TRAPS) {
570 _last_method_compiled[0] = '\0';
571
572 // No need to initialize compilation system if we do not use it.
573 if (!UseCompiler) {
574 return;
575 }
576 // Set the interface to the current compiler(s).
577 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
578 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
579
580 #if INCLUDE_JVMCI
581 if (EnableJVMCI) {
582 // This is creating a JVMCICompiler singleton.
583 JVMCICompiler* jvmci = new JVMCICompiler();
584
585 if (UseJVMCICompiler) {
586 _compilers[1] = jvmci;
587 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
588 if (BootstrapJVMCI) {
589 // JVMCI will bootstrap so give it more threads
590 _c2_count = MIN2(32, os::active_processor_count());
591 }
592 } else {
593 _c2_count = JVMCIThreads;
594 }
595 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
596 } else {
597 _c1_count = JVMCIHostThreads;
598 }
599 }
600 }
601 #endif // INCLUDE_JVMCI
602
603 #ifdef COMPILER1
604 if (_c1_count > 0) {
605 _compilers[0] = new Compiler();
606 }
607 #endif // COMPILER1
608
609 #ifdef COMPILER2
610 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
611 if (_c2_count > 0) {
612 _compilers[1] = new C2Compiler();
613 }
614 }
615 #endif // COMPILER2
616
617 // Start the compiler thread(s) and the sweeper thread
618 init_compiler_sweeper_threads();
619 // totalTime performance counter is always created as it is required
620 // by the implementation of java.lang.management.CompilationMBean.
621 {
622 EXCEPTION_MARK;
623 _perf_total_compilation =
624 PerfDataManager::create_counter(JAVA_CI, "totalTime",
625 PerfData::U_Ticks, CHECK);
626 }
627
628 if (UsePerfData) {
629
630 EXCEPTION_MARK;
631
632 // create the jvmstat performance counters
633 _perf_osr_compilation =
634 PerfDataManager::create_counter(SUN_CI, "osrTime",
635 PerfData::U_Ticks, CHECK);
636
637 _perf_standard_compilation =
638 PerfDataManager::create_counter(SUN_CI, "standardTime",
639 PerfData::U_Ticks, CHECK);
640
641 _perf_total_bailout_count =
642 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
643 PerfData::U_Events, CHECK);
644
645 _perf_total_invalidated_count =
646 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
647 PerfData::U_Events, CHECK);
648
649 _perf_total_compile_count =
650 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
651 PerfData::U_Events, CHECK);
652 _perf_total_osr_compile_count =
653 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
654 PerfData::U_Events, CHECK);
655
656 _perf_total_standard_compile_count =
657 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
658 PerfData::U_Events, CHECK);
659
660 _perf_sum_osr_bytes_compiled =
661 PerfDataManager::create_counter(SUN_CI, "osrBytes",
662 PerfData::U_Bytes, CHECK);
663
664 _perf_sum_standard_bytes_compiled =
665 PerfDataManager::create_counter(SUN_CI, "standardBytes",
666 PerfData::U_Bytes, CHECK);
667
668 _perf_sum_nmethod_size =
669 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
670 PerfData::U_Bytes, CHECK);
671
672 _perf_sum_nmethod_code_size =
673 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
674 PerfData::U_Bytes, CHECK);
675
676 _perf_last_method =
677 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
678 CompilerCounters::cmname_buffer_length,
679 "", CHECK);
680
681 _perf_last_failed_method =
682 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
683 CompilerCounters::cmname_buffer_length,
684 "", CHECK);
685
686 _perf_last_invalidated_method =
687 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
688 CompilerCounters::cmname_buffer_length,
689 "", CHECK);
690
691 _perf_last_compile_type =
692 PerfDataManager::create_variable(SUN_CI, "lastType",
693 PerfData::U_None,
694 (jlong)CompileBroker::no_compile,
695 CHECK);
696
697 _perf_last_compile_size =
698 PerfDataManager::create_variable(SUN_CI, "lastSize",
699 PerfData::U_Bytes,
700 (jlong)CompileBroker::no_compile,
701 CHECK);
702
703
704 _perf_last_failed_type =
705 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
706 PerfData::U_None,
707 (jlong)CompileBroker::no_compile,
708 CHECK);
709
710 _perf_last_invalidated_type =
711 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
712 PerfData::U_None,
713 (jlong)CompileBroker::no_compile,
714 CHECK);
715 }
716 }
717
718 // Completes compiler initialization. Compilation requests submitted
719 // prior to this will be silently ignored.
720 void CompileBroker::compilation_init_phase2() {
721 _initialized = true;
722 }
723
724 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
725 Klass* k = SystemDictionary::find(vmSymbols::java_lang_Thread(), Handle(), Handle(), CHECK_NH);
726 assert(k != NULL, "must be initialized");
727 InstanceKlass* klass = InstanceKlass::cast(k);
728 instanceHandle thread_handle = klass->allocate_instance_handle(CHECK_NH);
729 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
730
731 // Initialize thread_oop to put it into the system threadGroup
732 Handle thread_group(THREAD, Universe::system_thread_group());
733 JavaValue result(T_VOID);
734 JavaCalls::call_special(&result, thread_handle,
735 klass,
736 vmSymbols::object_initializer_name(),
737 vmSymbols::threadgroup_string_void_signature(),
738 thread_group,
739 string,
740 CHECK_NH);
741
742 return thread_handle;
743 }
744
745
746 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue,
747 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
748 JavaThread* thread = NULL;
749 {
750 MutexLocker mu(Threads_lock, THREAD);
751 if (compiler_thread) {
752 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
753 CompilerCounters* counters = new CompilerCounters();
754 thread = new CompilerThread(queue, counters);
755 }
756 } else {
757 thread = new CodeCacheSweeperThread();
758 }
759 // At this point the new CompilerThread data-races with this startup
760 // thread (which I believe is the primoridal thread and NOT the VM
761 // thread). This means Java bytecodes being executed at startup can
762 // queue compile jobs which will run at whatever default priority the
763 // newly created CompilerThread runs at.
764
765
766 // At this point it may be possible that no osthread was created for the
767 // JavaThread due to lack of memory. We would have to throw an exception
768 // in that case. However, since this must work and we do not allow
769 // exceptions anyway, check and abort if this fails. But first release the
770 // lock.
771
772 if (thread != NULL && thread->osthread() != NULL) {
773
774 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
775
776 // Note that this only sets the JavaThread _priority field, which by
777 // definition is limited to Java priorities and not OS priorities.
778 // The os-priority is set in the CompilerThread startup code itself
779
780 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
781
782 // Note that we cannot call os::set_priority because it expects Java
783 // priorities and we are *explicitly* using OS priorities so that it's
784 // possible to set the compiler thread priority higher than any Java
785 // thread.
786
787 int native_prio = CompilerThreadPriority;
788 if (native_prio == -1) {
789 if (UseCriticalCompilerThreadPriority) {
790 native_prio = os::java_to_os_priority[CriticalPriority];
791 } else {
792 native_prio = os::java_to_os_priority[NearMaxPriority];
793 }
794 }
795 os::set_native_priority(thread, native_prio);
796
797 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
798
799 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
800 if (compiler_thread) {
801 thread->as_CompilerThread()->set_compiler(comp);
802 }
803 Threads::add(thread);
804 Thread::start(thread);
805 }
806 }
807
808 // First release lock before aborting VM.
809 if (thread == NULL || thread->osthread() == NULL) {
810 if (UseDynamicNumberOfCompilerThreads && comp->num_compiler_threads() > 0) {
811 if (thread != NULL) {
812 thread->smr_delete();
813 }
814 return NULL;
815 }
816 vm_exit_during_initialization("java.lang.OutOfMemoryError",
817 os::native_thread_creation_failed_msg());
818 }
819
820 // Let go of Threads_lock before yielding
821 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
822
823 return thread;
824 }
825
826
827 void CompileBroker::init_compiler_sweeper_threads() {
828 EXCEPTION_MARK;
829 #if !defined(ZERO)
830 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
831 #endif // !ZERO
832 // Initialize the compilation queue
833 if (_c2_count > 0) {
834 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
835 _c2_compile_queue = new CompileQueue(name);
836 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
837 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
838 }
839 if (_c1_count > 0) {
840 _c1_compile_queue = new CompileQueue("C1 compile queue");
841 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
842 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
843 }
844
845 char name_buffer[256];
846
847 for (int i = 0; i < _c2_count; i++) {
848 // Create a name for our thread.
849 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
850 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
851 _compiler2_objects[i] = thread_handle;
852 _compiler2_logs[i] = NULL;
853
854 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
855 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], /* compiler_thread */ true, CHECK);
856 assert(ct != NULL, "should have been handled for initial thread");
857 _compilers[1]->set_num_compiler_threads(i + 1);
858 if (TraceCompilerThreads) {
859 ResourceMark rm;
860 MutexLocker mu(Threads_lock);
861 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
862 }
863 }
864 }
865
866 for (int i = 0; i < _c1_count; i++) {
867 // Create a name for our thread.
868 sprintf(name_buffer, "C1 CompilerThread%d", i);
869 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD));
870 _compiler1_objects[i] = thread_handle;
871 _compiler1_logs[i] = NULL;
872
873 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
874 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], /* compiler_thread */ true, CHECK);
875 assert(ct != NULL, "should have been handled for initial thread");
876 _compilers[0]->set_num_compiler_threads(i + 1);
877 if (TraceCompilerThreads) {
878 ResourceMark rm;
879 MutexLocker mu(Threads_lock);
880 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
881 }
882 }
883 }
884
885 if (UsePerfData) {
886 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
887 }
888
889 if (MethodFlushing) {
890 // Initialize the sweeper thread
891 jobject thread_handle = JNIHandles::make_local(THREAD, create_thread_oop("Sweeper thread", THREAD)());
892 make_thread(thread_handle, NULL, NULL, /* compiler_thread */ false, CHECK);
893 }
894 }
895
896 void CompileBroker::possibly_add_compiler_threads() {
897 EXCEPTION_MARK;
898
899 julong available_memory = os::available_memory();
900 // Only do attempt to start additional threads if the lock is free.
901 if (!CompileThread_lock->try_lock()) return;
902
903 if (_c2_compile_queue != NULL) {
904 int old_c2_count = _compilers[1]->num_compiler_threads();
905 int new_c2_count = MIN3(_c2_count,
906 _c2_compile_queue->size() / 2,
907 (int)(available_memory / 200*M));
908
909 for (int i = old_c2_count; i < new_c2_count; i++) {
910 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], true, CHECK);
911 if (ct == NULL) break;
912 _compilers[1]->set_num_compiler_threads(i + 1);
913 if (TraceCompilerThreads) {
914 ResourceMark rm;
915 MutexLocker mu(Threads_lock);
916 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
917 ct->get_thread_name(), (int)(available_memory/M));
918 }
919 }
920 }
921
922 if (_c1_compile_queue != NULL) {
923 int old_c1_count = _compilers[0]->num_compiler_threads();
924 int new_c1_count = MIN3(_c1_count,
925 _c1_compile_queue->size() / 2,
926 (int)(available_memory / 100*M));
927
928 for (int i = old_c1_count; i < new_c1_count; i++) {
929 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], true, CHECK);
930 if (ct == NULL) break;
931 _compilers[0]->set_num_compiler_threads(i + 1);
932 if (TraceCompilerThreads) {
933 ResourceMark rm;
934 MutexLocker mu(Threads_lock);
935 tty->print_cr("Added compiler thread %s (available memory: %dMB)",
936 ct->get_thread_name(), (int)(available_memory/M));
937 }
938 }
939 }
940
941 CompileThread_lock->unlock();
942 }
943
944
945 /**
946 * Set the methods on the stack as on_stack so that redefine classes doesn't
947 * reclaim them. This method is executed at a safepoint.
948 */
949 void CompileBroker::mark_on_stack() {
950 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
951 // Since we are at a safepoint, we do not need a lock to access
952 // the compile queues.
953 if (_c2_compile_queue != NULL) {
954 _c2_compile_queue->mark_on_stack();
955 }
956 if (_c1_compile_queue != NULL) {
957 _c1_compile_queue->mark_on_stack();
958 }
959 }
960
961 // ------------------------------------------------------------------
962 // CompileBroker::compile_method
963 //
964 // Request compilation of a method.
965 void CompileBroker::compile_method_base(const methodHandle& method,
966 int osr_bci,
967 int comp_level,
968 const methodHandle& hot_method,
969 int hot_count,
970 CompileTask::CompileReason compile_reason,
971 bool blocking,
972 Thread* thread) {
973 guarantee(!method->is_abstract(), "cannot compile abstract methods");
974 assert(method->method_holder()->is_instance_klass(),
975 "sanity check");
976 assert(!method->method_holder()->is_not_initialized(),
977 "method holder must be initialized");
978 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
979
980 if (CIPrintRequests) {
981 tty->print("request: ");
982 method->print_short_name(tty);
983 if (osr_bci != InvocationEntryBci) {
984 tty->print(" osr_bci: %d", osr_bci);
985 }
986 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
987 if (!hot_method.is_null()) {
988 tty->print(" hot: ");
989 if (hot_method() != method()) {
990 hot_method->print_short_name(tty);
991 } else {
992 tty->print("yes");
993 }
994 }
995 tty->cr();
996 }
997
998 // A request has been made for compilation. Before we do any
999 // real work, check to see if the method has been compiled
1000 // in the meantime with a definitive result.
1001 if (compilation_is_complete(method, osr_bci, comp_level)) {
1002 return;
1003 }
1004
1005 #ifndef PRODUCT
1006 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1007 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1008 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1009 return;
1010 }
1011 }
1012 #endif
1013
1014 // If this method is already in the compile queue, then
1015 // we do not block the current thread.
1016 if (compilation_is_in_queue(method)) {
1017 // We may want to decay our counter a bit here to prevent
1018 // multiple denied requests for compilation. This is an
1019 // open compilation policy issue. Note: The other possibility,
1020 // in the case that this is a blocking compile request, is to have
1021 // all subsequent blocking requesters wait for completion of
1022 // ongoing compiles. Note that in this case we'll need a protocol
1023 // for freeing the associated compile tasks. [Or we could have
1024 // a single static monitor on which all these waiters sleep.]
1025 return;
1026 }
1027
1028 if (TieredCompilation) {
1029 // Tiered policy requires MethodCounters to exist before adding a method to
1030 // the queue. Create if we don't have them yet.
1031 method->get_method_counters(thread);
1032 }
1033
1034 // Outputs from the following MutexLocker block:
1035 CompileTask* task = NULL;
1036 CompileQueue* queue = compile_queue(comp_level);
1037
1038 // Acquire our lock.
1039 {
1040 MutexLocker locker(MethodCompileQueue_lock, thread);
1041
1042 // Make sure the method has not slipped into the queues since
1043 // last we checked; note that those checks were "fast bail-outs".
1044 // Here we need to be more careful, see 14012000 below.
1045 if (compilation_is_in_queue(method)) {
1046 return;
1047 }
1048
1049 // We need to check again to see if the compilation has
1050 // completed. A previous compilation may have registered
1051 // some result.
1052 if (compilation_is_complete(method, osr_bci, comp_level)) {
1053 return;
1054 }
1055
1056 // We now know that this compilation is not pending, complete,
1057 // or prohibited. Assign a compile_id to this compilation
1058 // and check to see if it is in our [Start..Stop) range.
1059 int compile_id = assign_compile_id(method, osr_bci);
1060 if (compile_id == 0) {
1061 // The compilation falls outside the allowed range.
1062 return;
1063 }
1064
1065 #if INCLUDE_JVMCI
1066 if (UseJVMCICompiler) {
1067 if (blocking) {
1068 // Don't allow blocking compiles for requests triggered by JVMCI.
1069 if (thread->is_Compiler_thread()) {
1070 blocking = false;
1071 }
1072
1073 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1074 vframeStream vfst((JavaThread*) thread);
1075 for (; !vfst.at_end(); vfst.next()) {
1076 if (vfst.method()->is_static_initializer() ||
1077 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1078 vfst.method()->name() == vmSymbols::loadClass_name())) {
1079 blocking = false;
1080 break;
1081 }
1082 }
1083
1084 // Don't allow blocking compilation requests to JVMCI
1085 // if JVMCI itself is not yet initialized
1086 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
1087 blocking = false;
1088 }
1089
1090 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1091 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1092 // such as the DestroyJavaVM thread.
1093 if (JVMCIRuntime::shutdown_called()) {
1094 blocking = false;
1095 }
1096 }
1097 }
1098 #endif // INCLUDE_JVMCI
1099
1100 // We will enter the compilation in the queue.
1101 // 14012000: Note that this sets the queued_for_compile bits in
1102 // the target method. We can now reason that a method cannot be
1103 // queued for compilation more than once, as follows:
1104 // Before a thread queues a task for compilation, it first acquires
1105 // the compile queue lock, then checks if the method's queued bits
1106 // are set or it has already been compiled. Thus there can not be two
1107 // instances of a compilation task for the same method on the
1108 // compilation queue. Consider now the case where the compilation
1109 // thread has already removed a task for that method from the queue
1110 // and is in the midst of compiling it. In this case, the
1111 // queued_for_compile bits must be set in the method (and these
1112 // will be visible to the current thread, since the bits were set
1113 // under protection of the compile queue lock, which we hold now.
1114 // When the compilation completes, the compiler thread first sets
1115 // the compilation result and then clears the queued_for_compile
1116 // bits. Neither of these actions are protected by a barrier (or done
1117 // under the protection of a lock), so the only guarantee we have
1118 // (on machines with TSO (Total Store Order)) is that these values
1119 // will update in that order. As a result, the only combinations of
1120 // these bits that the current thread will see are, in temporal order:
1121 // <RESULT, QUEUE> :
1122 // <0, 1> : in compile queue, but not yet compiled
1123 // <1, 1> : compiled but queue bit not cleared
1124 // <1, 0> : compiled and queue bit cleared
1125 // Because we first check the queue bits then check the result bits,
1126 // we are assured that we cannot introduce a duplicate task.
1127 // Note that if we did the tests in the reverse order (i.e. check
1128 // result then check queued bit), we could get the result bit before
1129 // the compilation completed, and the queue bit after the compilation
1130 // completed, and end up introducing a "duplicate" (redundant) task.
1131 // In that case, the compiler thread should first check if a method
1132 // has already been compiled before trying to compile it.
1133 // NOTE: in the event that there are multiple compiler threads and
1134 // there is de-optimization/recompilation, things will get hairy,
1135 // and in that case it's best to protect both the testing (here) of
1136 // these bits, and their updating (here and elsewhere) under a
1137 // common lock.
1138 task = create_compile_task(queue,
1139 compile_id, method,
1140 osr_bci, comp_level,
1141 hot_method, hot_count, compile_reason,
1142 blocking);
1143 }
1144
1145 if (blocking) {
1146 wait_for_completion(task);
1147 }
1148 }
1149
1150 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1151 int comp_level,
1152 const methodHandle& hot_method, int hot_count,
1153 CompileTask::CompileReason compile_reason,
1154 Thread* THREAD) {
1155 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1156 if (!_initialized || comp_level == CompLevel_none) {
1157 return NULL;
1158 }
1159
1160 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1161 assert(comp != NULL, "Ensure we have a compiler");
1162
1163 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1164 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1165 DirectivesStack::release(directive);
1166 return nm;
1167 }
1168
1169 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1170 int comp_level,
1171 const methodHandle& hot_method, int hot_count,
1172 CompileTask::CompileReason compile_reason,
1173 DirectiveSet* directive,
1174 Thread* THREAD) {
1175
1176 // make sure arguments make sense
1177 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1178 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1179 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1180 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1181 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1182 // allow any levels for WhiteBox
1183 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1184 // return quickly if possible
1185
1186 // lock, make sure that the compilation
1187 // isn't prohibited in a straightforward way.
1188 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1189 if (comp == NULL || !comp->can_compile_method(method) ||
1190 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1191 return NULL;
1192 }
1193
1194 #if INCLUDE_JVMCI
1195 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1196 return NULL;
1197 }
1198 #endif
1199
1200 if (osr_bci == InvocationEntryBci) {
1201 // standard compilation
1202 CompiledMethod* method_code = method->code();
1203 if (method_code != NULL && method_code->is_nmethod()) {
1204 if (compilation_is_complete(method, osr_bci, comp_level)) {
1205 return (nmethod*) method_code;
1206 }
1207 }
1208 if (method->is_not_compilable(comp_level)) {
1209 return NULL;
1210 }
1211 } else {
1212 // osr compilation
1213 #ifndef TIERED
1214 // seems like an assert of dubious value
1215 assert(comp_level == CompLevel_highest_tier,
1216 "all OSR compiles are assumed to be at a single compilation level");
1217 #endif // TIERED
1218 // We accept a higher level osr method
1219 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1220 if (nm != NULL) return nm;
1221 if (method->is_not_osr_compilable(comp_level)) return NULL;
1222 }
1223
1224 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1225 // some prerequisites that are compiler specific
1226 if (comp->is_c2()) {
1227 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1228 // Resolve all classes seen in the signature of the method
1229 // we are compiling.
1230 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1231 }
1232
1233 // If the method is native, do the lookup in the thread requesting
1234 // the compilation. Native lookups can load code, which is not
1235 // permitted during compilation.
1236 //
1237 // Note: A native method implies non-osr compilation which is
1238 // checked with an assertion at the entry of this method.
1239 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1240 bool in_base_library;
1241 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1242 if (HAS_PENDING_EXCEPTION) {
1243 // In case of an exception looking up the method, we just forget
1244 // about it. The interpreter will kick-in and throw the exception.
1245 method->set_not_compilable(); // implies is_not_osr_compilable()
1246 CLEAR_PENDING_EXCEPTION;
1247 return NULL;
1248 }
1249 assert(method->has_native_function(), "must have native code by now");
1250 }
1251
1252 // RedefineClasses() has replaced this method; just return
1253 if (method->is_old()) {
1254 return NULL;
1255 }
1256
1257 // JVMTI -- post_compile_event requires jmethod_id() that may require
1258 // a lock the compiling thread can not acquire. Prefetch it here.
1259 if (JvmtiExport::should_post_compiled_method_load()) {
1260 method->jmethod_id();
1261 }
1262
1263 // do the compilation
1264 if (method->is_native()) {
1265 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1266 // The following native methods:
1267 //
1268 // java.lang.Float.intBitsToFloat
1269 // java.lang.Float.floatToRawIntBits
1270 // java.lang.Double.longBitsToDouble
1271 // java.lang.Double.doubleToRawLongBits
1272 //
1273 // are called through the interpreter even if interpreter native stubs
1274 // are not preferred (i.e., calling through adapter handlers is preferred).
1275 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1276 // if the version of the methods from the native libraries is called.
1277 // As the interpreter and the C2-intrinsified version of the methods preserves
1278 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1279 if ((UseSSE >= 1 &&
1280 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1281 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1282 (UseSSE >= 2 &&
1283 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1284 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1285 return NULL;
1286 }
1287
1288 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1289 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1290 //
1291 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1292 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1293 AdapterHandlerLibrary::create_native_wrapper(method);
1294 } else {
1295 return NULL;
1296 }
1297 } else {
1298 // If the compiler is shut off due to code cache getting full
1299 // fail out now so blocking compiles dont hang the java thread
1300 if (!should_compile_new_jobs()) {
1301 CompilationPolicy::policy()->delay_compilation(method());
1302 return NULL;
1303 }
1304 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1305 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1306 }
1307
1308 // return requested nmethod
1309 // We accept a higher level osr method
1310 if (osr_bci == InvocationEntryBci) {
1311 CompiledMethod* code = method->code();
1312 if (code == NULL) {
1313 return (nmethod*) code;
1314 } else {
1315 return code->as_nmethod_or_null();
1316 }
1317 }
1318 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1319 }
1320
1321
1322 // ------------------------------------------------------------------
1323 // CompileBroker::compilation_is_complete
1324 //
1325 // See if compilation of this method is already complete.
1326 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1327 int osr_bci,
1328 int comp_level) {
1329 bool is_osr = (osr_bci != standard_entry_bci);
1330 if (is_osr) {
1331 if (method->is_not_osr_compilable(comp_level)) {
1332 return true;
1333 } else {
1334 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1335 return (result != NULL);
1336 }
1337 } else {
1338 if (method->is_not_compilable(comp_level)) {
1339 return true;
1340 } else {
1341 CompiledMethod* result = method->code();
1342 if (result == NULL) return false;
1343 return comp_level == result->comp_level();
1344 }
1345 }
1346 }
1347
1348
1349 /**
1350 * See if this compilation is already requested.
1351 *
1352 * Implementation note: there is only a single "is in queue" bit
1353 * for each method. This means that the check below is overly
1354 * conservative in the sense that an osr compilation in the queue
1355 * will block a normal compilation from entering the queue (and vice
1356 * versa). This can be remedied by a full queue search to disambiguate
1357 * cases. If it is deemed profitable, this may be done.
1358 */
1359 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1360 return method->queued_for_compilation();
1361 }
1362
1363 // ------------------------------------------------------------------
1364 // CompileBroker::compilation_is_prohibited
1365 //
1366 // See if this compilation is not allowed.
1367 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1368 bool is_native = method->is_native();
1369 // Some compilers may not support the compilation of natives.
1370 AbstractCompiler *comp = compiler(comp_level);
1371 if (is_native &&
1372 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1373 method->set_not_compilable_quietly(comp_level);
1374 return true;
1375 }
1376
1377 bool is_osr = (osr_bci != standard_entry_bci);
1378 // Some compilers may not support on stack replacement.
1379 if (is_osr &&
1380 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1381 method->set_not_osr_compilable(comp_level);
1382 return true;
1383 }
1384
1385 // The method may be explicitly excluded by the user.
1386 double scale;
1387 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1388 bool quietly = CompilerOracle::should_exclude_quietly();
1389 if (PrintCompilation && !quietly) {
1390 // This does not happen quietly...
1391 ResourceMark rm;
1392 tty->print("### Excluding %s:%s",
1393 method->is_native() ? "generation of native wrapper" : "compile",
1394 (method->is_static() ? " static" : ""));
1395 method->print_short_name(tty);
1396 tty->cr();
1397 }
1398 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1399 }
1400
1401 return false;
1402 }
1403
1404 /**
1405 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1406 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1407 * The function also allows to generate separate compilation IDs for OSR compilations.
1408 */
1409 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1410 #ifdef ASSERT
1411 bool is_osr = (osr_bci != standard_entry_bci);
1412 int id;
1413 if (method->is_native()) {
1414 assert(!is_osr, "can't be osr");
1415 // Adapters, native wrappers and method handle intrinsics
1416 // should be generated always.
1417 return Atomic::add(1, &_compilation_id);
1418 } else if (CICountOSR && is_osr) {
1419 id = Atomic::add(1, &_osr_compilation_id);
1420 if (CIStartOSR <= id && id < CIStopOSR) {
1421 return id;
1422 }
1423 } else {
1424 id = Atomic::add(1, &_compilation_id);
1425 if (CIStart <= id && id < CIStop) {
1426 return id;
1427 }
1428 }
1429
1430 // Method was not in the appropriate compilation range.
1431 method->set_not_compilable_quietly();
1432 return 0;
1433 #else
1434 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1435 // only _compilation_id is incremented.
1436 return Atomic::add(1, &_compilation_id);
1437 #endif
1438 }
1439
1440 // ------------------------------------------------------------------
1441 // CompileBroker::assign_compile_id_unlocked
1442 //
1443 // Public wrapper for assign_compile_id that acquires the needed locks
1444 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1445 MutexLocker locker(MethodCompileQueue_lock, thread);
1446 return assign_compile_id(method, osr_bci);
1447 }
1448
1449 // ------------------------------------------------------------------
1450 // CompileBroker::preload_classes
1451 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1452 // Move this code over from c1_Compiler.cpp
1453 ShouldNotReachHere();
1454 }
1455
1456
1457 // ------------------------------------------------------------------
1458 // CompileBroker::create_compile_task
1459 //
1460 // Create a CompileTask object representing the current request for
1461 // compilation. Add this task to the queue.
1462 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1463 int compile_id,
1464 const methodHandle& method,
1465 int osr_bci,
1466 int comp_level,
1467 const methodHandle& hot_method,
1468 int hot_count,
1469 CompileTask::CompileReason compile_reason,
1470 bool blocking) {
1471 CompileTask* new_task = CompileTask::allocate();
1472 new_task->initialize(compile_id, method, osr_bci, comp_level,
1473 hot_method, hot_count, compile_reason,
1474 blocking);
1475 queue->add(new_task);
1476 return new_task;
1477 }
1478
1479 #if INCLUDE_JVMCI
1480 // The number of milliseconds to wait before checking if
1481 // JVMCI compilation has made progress.
1482 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1483
1484 // The number of JVMCI compilation progress checks that must fail
1485 // before unblocking a thread waiting for a blocking compilation.
1486 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1487
1488 /**
1489 * Waits for a JVMCI compiler to complete a given task. This thread
1490 * waits until either the task completes or it sees no JVMCI compilation
1491 * progress for N consecutive milliseconds where N is
1492 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1493 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1494 *
1495 * @return true if this thread needs to free/recycle the task
1496 */
1497 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1498 MutexLocker waiter(task->lock(), thread);
1499 int progress_wait_attempts = 0;
1500 int methods_compiled = jvmci->methods_compiled();
1501 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1502 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1503 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1504
1505 bool progress;
1506 if (jvmci_compiler_thread != NULL) {
1507 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1508 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1509 } else {
1510 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1511 // that all JVMCI compiler threads are blocked on. We use the counter for
1512 // successful JVMCI compilations to determine whether JVMCI compilation
1513 // is still making progress through the JVMCI compiler queue.
1514 progress = jvmci->methods_compiled() != methods_compiled;
1515 }
1516
1517 if (!progress) {
1518 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1519 if (PrintCompilation) {
1520 task->print(tty, "wait for blocking compilation timed out");
1521 }
1522 break;
1523 }
1524 } else {
1525 progress_wait_attempts = 0;
1526 if (jvmci_compiler_thread == NULL) {
1527 methods_compiled = jvmci->methods_compiled();
1528 }
1529 }
1530 }
1531 task->clear_waiter();
1532 return task->is_complete();
1533 }
1534 #endif
1535
1536 /**
1537 * Wait for the compilation task to complete.
1538 */
1539 void CompileBroker::wait_for_completion(CompileTask* task) {
1540 if (CIPrintCompileQueue) {
1541 ttyLocker ttyl;
1542 tty->print_cr("BLOCKING FOR COMPILE");
1543 }
1544
1545 assert(task->is_blocking(), "can only wait on blocking task");
1546
1547 JavaThread* thread = JavaThread::current();
1548 thread->set_blocked_on_compilation(true);
1549
1550 methodHandle method(thread, task->method());
1551 bool free_task;
1552 #if INCLUDE_JVMCI
1553 AbstractCompiler* comp = compiler(task->comp_level());
1554 if (comp->is_jvmci()) {
1555 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1556 } else
1557 #endif
1558 {
1559 MutexLocker waiter(task->lock(), thread);
1560 free_task = true;
1561 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1562 task->lock()->wait();
1563 }
1564 }
1565
1566 thread->set_blocked_on_compilation(false);
1567 if (free_task) {
1568 if (is_compilation_disabled_forever()) {
1569 CompileTask::free(task);
1570 return;
1571 }
1572
1573 // It is harmless to check this status without the lock, because
1574 // completion is a stable property (until the task object is recycled).
1575 assert(task->is_complete(), "Compilation should have completed");
1576 assert(task->code_handle() == NULL, "must be reset");
1577
1578 // By convention, the waiter is responsible for recycling a
1579 // blocking CompileTask. Since there is only one waiter ever
1580 // waiting on a CompileTask, we know that no one else will
1581 // be using this CompileTask; we can free it.
1582 CompileTask::free(task);
1583 }
1584 }
1585
1586 /**
1587 * Initialize compiler thread(s) + compiler object(s). The postcondition
1588 * of this function is that the compiler runtimes are initialized and that
1589 * compiler threads can start compiling.
1590 */
1591 bool CompileBroker::init_compiler_runtime() {
1592 CompilerThread* thread = CompilerThread::current();
1593 AbstractCompiler* comp = thread->compiler();
1594 // Final sanity check - the compiler object must exist
1595 guarantee(comp != NULL, "Compiler object must exist");
1596
1597 int system_dictionary_modification_counter;
1598 {
1599 MutexLocker locker(Compile_lock, thread);
1600 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1601 }
1602
1603 {
1604 // Must switch to native to allocate ci_env
1605 ThreadToNativeFromVM ttn(thread);
1606 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1607 // Cache Jvmti state
1608 ci_env.cache_jvmti_state();
1609 // Cache DTrace flags
1610 ci_env.cache_dtrace_flags();
1611
1612 // Switch back to VM state to do compiler initialization
1613 ThreadInVMfromNative tv(thread);
1614 ResetNoHandleMark rnhm;
1615
1616 // Perform per-thread and global initializations
1617 comp->initialize();
1618 }
1619
1620 if (comp->is_failed()) {
1621 disable_compilation_forever();
1622 // If compiler initialization failed, no compiler thread that is specific to a
1623 // particular compiler runtime will ever start to compile methods.
1624 shutdown_compiler_runtime(comp, thread);
1625 return false;
1626 }
1627
1628 // C1 specific check
1629 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1630 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1631 return false;
1632 }
1633
1634 return true;
1635 }
1636
1637 /**
1638 * If C1 and/or C2 initialization failed, we shut down all compilation.
1639 * We do this to keep things simple. This can be changed if it ever turns
1640 * out to be a problem.
1641 */
1642 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1643 // Free buffer blob, if allocated
1644 if (thread->get_buffer_blob() != NULL) {
1645 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1646 CodeCache::free(thread->get_buffer_blob());
1647 }
1648
1649 if (comp->should_perform_shutdown()) {
1650 // There are two reasons for shutting down the compiler
1651 // 1) compiler runtime initialization failed
1652 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1653 warning("%s initialization failed. Shutting down all compilers", comp->name());
1654
1655 // Only one thread per compiler runtime object enters here
1656 // Set state to shut down
1657 comp->set_shut_down();
1658
1659 // Delete all queued compilation tasks to make compiler threads exit faster.
1660 if (_c1_compile_queue != NULL) {
1661 _c1_compile_queue->free_all();
1662 }
1663
1664 if (_c2_compile_queue != NULL) {
1665 _c2_compile_queue->free_all();
1666 }
1667
1668 // Set flags so that we continue execution with using interpreter only.
1669 UseCompiler = false;
1670 UseInterpreter = true;
1671
1672 // We could delete compiler runtimes also. However, there are references to
1673 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1674 // fail. This can be done later if necessary.
1675 }
1676 }
1677
1678 /**
1679 * Helper function to create new or reuse old CompileLog.
1680 */
1681 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1682 if (!LogCompilation) return NULL;
1683
1684 AbstractCompiler *compiler = ct->compiler();
1685 bool c1 = compiler->is_c1();
1686
1687 // Find Compiler number by its threadObj.
1688 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1689 oop compiler_obj = ct->threadObj();
1690 int compiler_number = 0;
1691 bool found = false;
1692 for (; compiler_number < (c1 ? _c1_count : _c2_count); compiler_number++) {
1693 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1694 found = true;
1695 break;
1696 }
1697 }
1698 assert(found, "Compiler must exist at this point");
1699
1700 // Determine pointer for this threads log.
1701 assert(_compiler1_logs != NULL, "must be initialized at this point");
1702 assert(_compiler2_logs != NULL, "must be initialized at this point");
1703 CompileLog** log_ptr = c1 ? &_compiler1_logs[compiler_number]
1704 : &_compiler2_logs[compiler_number];
1705
1706 // Return old one if it exists.
1707 CompileLog* log = *log_ptr;
1708 if (log != NULL) {
1709 ct->init_log(log);
1710 return log;
1711 }
1712
1713 // Create a new one and remember it.
1714 init_compiler_thread_log();
1715 log = ct->log();
1716 *log_ptr = log;
1717 return log;
1718 }
1719
1720 // ------------------------------------------------------------------
1721 // CompileBroker::compiler_thread_loop
1722 //
1723 // The main loop run by a CompilerThread.
1724 void CompileBroker::compiler_thread_loop() {
1725 CompilerThread* thread = CompilerThread::current();
1726 CompileQueue* queue = thread->queue();
1727 // For the thread that initializes the ciObjectFactory
1728 // this resource mark holds all the shared objects
1729 ResourceMark rm;
1730
1731 // First thread to get here will initialize the compiler interface
1732
1733 {
1734 ASSERT_IN_VM;
1735 MutexLocker only_one (CompileThread_lock, thread);
1736 if (!ciObjectFactory::is_initialized()) {
1737 ciObjectFactory::initialize();
1738 }
1739 }
1740
1741 // Open a log.
1742 CompileLog* log = get_log(thread);
1743 if (log != NULL) {
1744 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1745 thread->name(),
1746 os::current_thread_id(),
1747 os::current_process_id());
1748 log->stamp();
1749 log->end_elem();
1750 }
1751
1752 // If compiler thread/runtime initialization fails, exit the compiler thread
1753 if (!init_compiler_runtime()) {
1754 return;
1755 }
1756
1757 thread->start_idle_timer();
1758
1759 // Poll for new compilation tasks as long as the JVM runs. Compilation
1760 // should only be disabled if something went wrong while initializing the
1761 // compiler runtimes. This, in turn, should not happen. The only known case
1762 // when compiler runtime initialization fails is if there is not enough free
1763 // space in the code cache to generate the necessary stubs, etc.
1764 while (!is_compilation_disabled_forever()) {
1765 // We need this HandleMark to avoid leaking VM handles.
1766 HandleMark hm(thread);
1767
1768 CompileTask* task = queue->get();
1769 if (task == NULL) {
1770 if (UseDynamicNumberOfCompilerThreads) {
1771 // Access compiler_count under lock to enforce consistency.
1772 MutexLocker only_one(CompileThread_lock);
1773 if (can_remove(thread, true)) {
1774 if (TraceCompilerThreads) {
1775 tty->print_cr("Removing compiler thread %s after it was " JLONG_FORMAT " ms idle",
1776 thread->name(), thread->idle_time_millis());
1777 }
1778 return; // Stop this thread.
1779 }
1780 }
1781 continue;
1782 }
1783
1784 if (UseDynamicNumberOfCompilerThreads) {
1785 possibly_add_compiler_threads();
1786 }
1787
1788 // Give compiler threads an extra quanta. They tend to be bursty and
1789 // this helps the compiler to finish up the job.
1790 if (CompilerThreadHintNoPreempt) {
1791 os::hint_no_preempt();
1792 }
1793
1794 // Assign the task to the current thread. Mark this compilation
1795 // thread as active for the profiler.
1796 CompileTaskWrapper ctw(task);
1797 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1798 task->set_code_handle(&result_handle);
1799 methodHandle method(thread, task->method());
1800
1801 // Never compile a method if breakpoints are present in it
1802 if (method()->number_of_breakpoints() == 0) {
1803 // Compile the method.
1804 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1805 invoke_compiler_on_method(task);
1806 thread->start_idle_timer();
1807 } else {
1808 // After compilation is disabled, remove remaining methods from queue
1809 method->clear_queued_for_compilation();
1810 task->set_failure_reason("compilation is disabled");
1811 }
1812 }
1813 }
1814
1815 // Shut down compiler runtime
1816 shutdown_compiler_runtime(thread->compiler(), thread);
1817 }
1818
1819 // ------------------------------------------------------------------
1820 // CompileBroker::init_compiler_thread_log
1821 //
1822 // Set up state required by +LogCompilation.
1823 void CompileBroker::init_compiler_thread_log() {
1824 CompilerThread* thread = CompilerThread::current();
1825 char file_name[4*K];
1826 FILE* fp = NULL;
1827 intx thread_id = os::current_thread_id();
1828 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1829 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1830 if (dir == NULL) {
1831 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1832 thread_id, os::current_process_id());
1833 } else {
1834 jio_snprintf(file_name, sizeof(file_name),
1835 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1836 os::file_separator(), thread_id, os::current_process_id());
1837 }
1838
1839 fp = fopen(file_name, "wt");
1840 if (fp != NULL) {
1841 if (LogCompilation && Verbose) {
1842 tty->print_cr("Opening compilation log %s", file_name);
1843 }
1844 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1845 if (log == NULL) {
1846 fclose(fp);
1847 return;
1848 }
1849 thread->init_log(log);
1850
1851 if (xtty != NULL) {
1852 ttyLocker ttyl;
1853 // Record any per thread log files
1854 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1855 }
1856 return;
1857 }
1858 }
1859 warning("Cannot open log file: %s", file_name);
1860 }
1861
1862 void CompileBroker::log_metaspace_failure() {
1863 const char* message = "some methods may not be compiled because metaspace "
1864 "is out of memory";
1865 if (_compilation_log != NULL) {
1866 _compilation_log->log_metaspace_failure(message);
1867 }
1868 if (PrintCompilation) {
1869 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1870 }
1871 }
1872
1873
1874 // ------------------------------------------------------------------
1875 // CompileBroker::set_should_block
1876 //
1877 // Set _should_block.
1878 // Call this from the VM, with Threads_lock held and a safepoint requested.
1879 void CompileBroker::set_should_block() {
1880 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1881 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1882 #ifndef PRODUCT
1883 if (PrintCompilation && (Verbose || WizardMode))
1884 tty->print_cr("notifying compiler thread pool to block");
1885 #endif
1886 _should_block = true;
1887 }
1888
1889 // ------------------------------------------------------------------
1890 // CompileBroker::maybe_block
1891 //
1892 // Call this from the compiler at convenient points, to poll for _should_block.
1893 void CompileBroker::maybe_block() {
1894 if (_should_block) {
1895 #ifndef PRODUCT
1896 if (PrintCompilation && (Verbose || WizardMode))
1897 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1898 #endif
1899 ThreadInVMfromNative tivfn(JavaThread::current());
1900 }
1901 }
1902
1903 // wrapper for CodeCache::print_summary()
1904 static void codecache_print(bool detailed)
1905 {
1906 ResourceMark rm;
1907 stringStream s;
1908 // Dump code cache into a buffer before locking the tty,
1909 {
1910 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1911 CodeCache::print_summary(&s, detailed);
1912 }
1913 ttyLocker ttyl;
1914 tty->print("%s", s.as_string());
1915 }
1916
1917 // wrapper for CodeCache::print_summary() using outputStream
1918 static void codecache_print(outputStream* out, bool detailed) {
1919 ResourceMark rm;
1920 stringStream s;
1921
1922 // Dump code cache into a buffer
1923 {
1924 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1925 CodeCache::print_summary(&s, detailed);
1926 }
1927
1928 char* remaining_log = s.as_string();
1929 while (*remaining_log != '\0') {
1930 char* eol = strchr(remaining_log, '\n');
1931 if (eol == NULL) {
1932 out->print_cr("%s", remaining_log);
1933 remaining_log = remaining_log + strlen(remaining_log);
1934 } else {
1935 *eol = '\0';
1936 out->print_cr("%s", remaining_log);
1937 remaining_log = eol + 1;
1938 }
1939 }
1940 }
1941
1942 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1943
1944 if (success) {
1945 task->mark_success();
1946 if (ci_env != NULL) {
1947 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1948 }
1949 if (_compilation_log != NULL) {
1950 nmethod* code = task->code();
1951 if (code != NULL) {
1952 _compilation_log->log_nmethod(thread, code);
1953 }
1954 }
1955 }
1956
1957 // simulate crash during compilation
1958 assert(task->compile_id() != CICrashAt, "just as planned");
1959 if (event.should_commit()) {
1960 event.set_method(task->method());
1961 event.set_compileId(task->compile_id());
1962 event.set_compileLevel(task->comp_level());
1963 event.set_succeded(task->is_success());
1964 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1965 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1966 event.set_inlinedBytes(task->num_inlined_bytecodes());
1967 event.commit();
1968 }
1969 }
1970
1971 int DirectivesStack::_depth = 0;
1972 CompilerDirectives* DirectivesStack::_top = NULL;
1973 CompilerDirectives* DirectivesStack::_bottom = NULL;
1974
1975 // ------------------------------------------------------------------
1976 // CompileBroker::invoke_compiler_on_method
1977 //
1978 // Compile a method.
1979 //
1980 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1981 task->print_ul();
1982 if (PrintCompilation) {
1983 ResourceMark rm;
1984 task->print_tty();
1985 }
1986 elapsedTimer time;
1987
1988 CompilerThread* thread = CompilerThread::current();
1989 ResourceMark rm(thread);
1990
1991 if (LogEvents) {
1992 _compilation_log->log_compile(thread, task);
1993 }
1994
1995 // Common flags.
1996 uint compile_id = task->compile_id();
1997 int osr_bci = task->osr_bci();
1998 bool is_osr = (osr_bci != standard_entry_bci);
1999 bool should_log = (thread->log() != NULL);
2000 bool should_break = false;
2001 const int task_level = task->comp_level();
2002 AbstractCompiler* comp = task->compiler();
2003
2004 DirectiveSet* directive;
2005 {
2006 // create the handle inside it's own block so it can't
2007 // accidentally be referenced once the thread transitions to
2008 // native. The NoHandleMark before the transition should catch
2009 // any cases where this occurs in the future.
2010 methodHandle method(thread, task->method());
2011 assert(!method->is_native(), "no longer compile natives");
2012
2013 // Look up matching directives
2014 directive = DirectivesStack::getMatchingDirective(method, comp);
2015
2016 // Save information about this method in case of failure.
2017 set_last_compile(thread, method, is_osr, task_level);
2018
2019 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2020 }
2021
2022 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2023 if (should_log && !directive->LogOption) {
2024 should_log = false;
2025 }
2026
2027 // Allocate a new set of JNI handles.
2028 push_jni_handle_block();
2029 Method* target_handle = task->method();
2030 int compilable = ciEnv::MethodCompilable;
2031 const char* failure_reason = NULL;
2032 const char* retry_message = NULL;
2033
2034 int system_dictionary_modification_counter;
2035 {
2036 MutexLocker locker(Compile_lock, thread);
2037 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2038 }
2039
2040 #if INCLUDE_JVMCI
2041 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2042 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2043
2044 TraceTime t1("compilation", &time);
2045 EventCompilation event;
2046
2047 // Skip redefined methods
2048 if (target_handle->is_old()) {
2049 failure_reason = "redefined method";
2050 retry_message = "not retryable";
2051 compilable = ciEnv::MethodCompilable_never;
2052 } else {
2053 JVMCIEnv env(task, system_dictionary_modification_counter);
2054 methodHandle method(thread, target_handle);
2055 jvmci->compile_method(method, osr_bci, &env);
2056
2057 failure_reason = env.failure_reason();
2058 if (!env.retryable()) {
2059 retry_message = "not retryable";
2060 compilable = ciEnv::MethodCompilable_not_at_tier;
2061 }
2062 }
2063 post_compile(thread, task, event, task->code() != NULL, NULL);
2064
2065 } else
2066 #endif // INCLUDE_JVMCI
2067 {
2068 NoHandleMark nhm;
2069 ThreadToNativeFromVM ttn(thread);
2070
2071 ciEnv ci_env(task, system_dictionary_modification_counter);
2072 if (should_break) {
2073 ci_env.set_break_at_compile(true);
2074 }
2075 if (should_log) {
2076 ci_env.set_log(thread->log());
2077 }
2078 assert(thread->env() == &ci_env, "set by ci_env");
2079 // The thread-env() field is cleared in ~CompileTaskWrapper.
2080
2081 // Cache Jvmti state
2082 ci_env.cache_jvmti_state();
2083
2084 // Cache DTrace flags
2085 ci_env.cache_dtrace_flags();
2086
2087 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2088
2089 TraceTime t1("compilation", &time);
2090 EventCompilation event;
2091
2092 if (comp == NULL) {
2093 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2094 } else {
2095 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2096 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2097 while (WhiteBox::compilation_locked) {
2098 locker.wait(Mutex::_no_safepoint_check_flag);
2099 }
2100 }
2101 comp->compile_method(&ci_env, target, osr_bci, directive);
2102 }
2103
2104 if (!ci_env.failing() && task->code() == NULL) {
2105 //assert(false, "compiler should always document failure");
2106 // The compiler elected, without comment, not to register a result.
2107 // Do not attempt further compilations of this method.
2108 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2109 }
2110
2111 // Copy this bit to the enclosing block:
2112 compilable = ci_env.compilable();
2113
2114 if (ci_env.failing()) {
2115 failure_reason = ci_env.failure_reason();
2116 retry_message = ci_env.retry_message();
2117 ci_env.report_failure(failure_reason);
2118 }
2119
2120 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
2121 }
2122 // Remove the JNI handle block after the ciEnv destructor has run in
2123 // the previous block.
2124 pop_jni_handle_block();
2125
2126 if (failure_reason != NULL) {
2127 task->set_failure_reason(failure_reason);
2128 if (_compilation_log != NULL) {
2129 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2130 }
2131 if (PrintCompilation) {
2132 FormatBufferResource msg = retry_message != NULL ?
2133 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2134 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2135 task->print(tty, msg);
2136 }
2137 }
2138
2139 methodHandle method(thread, task->method());
2140
2141 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2142
2143 collect_statistics(thread, time, task);
2144
2145 nmethod* nm = task->code();
2146 if (nm != NULL) {
2147 nm->maybe_print_nmethod(directive);
2148 }
2149 DirectivesStack::release(directive);
2150
2151 if (PrintCompilation && PrintCompilation2) {
2152 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2153 tty->print("%4d ", compile_id); // print compilation number
2154 tty->print("%s ", (is_osr ? "%" : " "));
2155 if (task->code() != NULL) {
2156 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2157 }
2158 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2159 }
2160
2161 Log(compilation, codecache) log;
2162 if (log.is_debug()) {
2163 LogStream ls(log.debug());
2164 codecache_print(&ls, /* detailed= */ false);
2165 }
2166 if (PrintCodeCacheOnCompilation) {
2167 codecache_print(/* detailed= */ false);
2168 }
2169 // Disable compilation, if required.
2170 switch (compilable) {
2171 case ciEnv::MethodCompilable_never:
2172 if (is_osr)
2173 method->set_not_osr_compilable_quietly();
2174 else
2175 method->set_not_compilable_quietly();
2176 break;
2177 case ciEnv::MethodCompilable_not_at_tier:
2178 if (is_osr)
2179 method->set_not_osr_compilable_quietly(task_level);
2180 else
2181 method->set_not_compilable_quietly(task_level);
2182 break;
2183 }
2184
2185 // Note that the queued_for_compilation bits are cleared without
2186 // protection of a mutex. [They were set by the requester thread,
2187 // when adding the task to the compile queue -- at which time the
2188 // compile queue lock was held. Subsequently, we acquired the compile
2189 // queue lock to get this task off the compile queue; thus (to belabour
2190 // the point somewhat) our clearing of the bits must be occurring
2191 // only after the setting of the bits. See also 14012000 above.
2192 method->clear_queued_for_compilation();
2193
2194 #ifdef ASSERT
2195 if (CollectedHeap::fired_fake_oom()) {
2196 // The current compile received a fake OOM during compilation so
2197 // go ahead and exit the VM since the test apparently succeeded
2198 tty->print_cr("*** Shutting down VM after successful fake OOM");
2199 vm_exit(0);
2200 }
2201 #endif
2202 }
2203
2204 /**
2205 * The CodeCache is full. Print warning and disable compilation.
2206 * Schedule code cache cleaning so compilation can continue later.
2207 * This function needs to be called only from CodeCache::allocate(),
2208 * since we currently handle a full code cache uniformly.
2209 */
2210 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2211 UseInterpreter = true;
2212 if (UseCompiler || AlwaysCompileLoopMethods ) {
2213 if (xtty != NULL) {
2214 ResourceMark rm;
2215 stringStream s;
2216 // Dump code cache state into a buffer before locking the tty,
2217 // because log_state() will use locks causing lock conflicts.
2218 CodeCache::log_state(&s);
2219 // Lock to prevent tearing
2220 ttyLocker ttyl;
2221 xtty->begin_elem("code_cache_full");
2222 xtty->print("%s", s.as_string());
2223 xtty->stamp();
2224 xtty->end_elem();
2225 }
2226
2227 #ifndef PRODUCT
2228 if (CompileTheWorld || ExitOnFullCodeCache) {
2229 codecache_print(/* detailed= */ true);
2230 before_exit(JavaThread::current());
2231 exit_globals(); // will delete tty
2232 vm_direct_exit(CompileTheWorld ? 0 : 1);
2233 }
2234 #endif
2235 if (UseCodeCacheFlushing) {
2236 // Since code cache is full, immediately stop new compiles
2237 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2238 NMethodSweeper::log_sweep("disable_compiler");
2239 }
2240 } else {
2241 disable_compilation_forever();
2242 }
2243
2244 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2245 }
2246 }
2247
2248 // ------------------------------------------------------------------
2249 // CompileBroker::set_last_compile
2250 //
2251 // Record this compilation for debugging purposes.
2252 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2253 ResourceMark rm;
2254 char* method_name = method->name()->as_C_string();
2255 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2256 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2257 char current_method[CompilerCounters::cmname_buffer_length];
2258 size_t maxLen = CompilerCounters::cmname_buffer_length;
2259
2260 if (UsePerfData) {
2261 const char* class_name = method->method_holder()->name()->as_C_string();
2262
2263 size_t s1len = strlen(class_name);
2264 size_t s2len = strlen(method_name);
2265
2266 // check if we need to truncate the string
2267 if (s1len + s2len + 2 > maxLen) {
2268
2269 // the strategy is to lop off the leading characters of the
2270 // class name and the trailing characters of the method name.
2271
2272 if (s2len + 2 > maxLen) {
2273 // lop of the entire class name string, let snprintf handle
2274 // truncation of the method name.
2275 class_name += s1len; // null string
2276 }
2277 else {
2278 // lop off the extra characters from the front of the class name
2279 class_name += ((s1len + s2len + 2) - maxLen);
2280 }
2281 }
2282
2283 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2284 }
2285
2286 if (CICountOSR && is_osr) {
2287 _last_compile_type = osr_compile;
2288 } else {
2289 _last_compile_type = normal_compile;
2290 }
2291 _last_compile_level = comp_level;
2292
2293 if (UsePerfData) {
2294 CompilerCounters* counters = thread->counters();
2295 counters->set_current_method(current_method);
2296 counters->set_compile_type((jlong)_last_compile_type);
2297 }
2298 }
2299
2300
2301 // ------------------------------------------------------------------
2302 // CompileBroker::push_jni_handle_block
2303 //
2304 // Push on a new block of JNI handles.
2305 void CompileBroker::push_jni_handle_block() {
2306 JavaThread* thread = JavaThread::current();
2307
2308 // Allocate a new block for JNI handles.
2309 // Inlined code from jni_PushLocalFrame()
2310 JNIHandleBlock* java_handles = thread->active_handles();
2311 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2312 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2313 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2314 thread->set_active_handles(compile_handles);
2315 }
2316
2317
2318 // ------------------------------------------------------------------
2319 // CompileBroker::pop_jni_handle_block
2320 //
2321 // Pop off the current block of JNI handles.
2322 void CompileBroker::pop_jni_handle_block() {
2323 JavaThread* thread = JavaThread::current();
2324
2325 // Release our JNI handle block
2326 JNIHandleBlock* compile_handles = thread->active_handles();
2327 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2328 thread->set_active_handles(java_handles);
2329 compile_handles->set_pop_frame_link(NULL);
2330 JNIHandleBlock::release_block(compile_handles, thread); // may block
2331 }
2332
2333 // ------------------------------------------------------------------
2334 // CompileBroker::collect_statistics
2335 //
2336 // Collect statistics about the compilation.
2337
2338 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2339 bool success = task->is_success();
2340 methodHandle method (thread, task->method());
2341 uint compile_id = task->compile_id();
2342 bool is_osr = (task->osr_bci() != standard_entry_bci);
2343 nmethod* code = task->code();
2344 CompilerCounters* counters = thread->counters();
2345
2346 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2347 MutexLocker locker(CompileStatistics_lock);
2348
2349 // _perf variables are production performance counters which are
2350 // updated regardless of the setting of the CITime and CITimeEach flags
2351 //
2352
2353 // account all time, including bailouts and failures in this counter;
2354 // C1 and C2 counters are counting both successful and unsuccessful compiles
2355 _t_total_compilation.add(time);
2356
2357 if (!success) {
2358 _total_bailout_count++;
2359 if (UsePerfData) {
2360 _perf_last_failed_method->set_value(counters->current_method());
2361 _perf_last_failed_type->set_value(counters->compile_type());
2362 _perf_total_bailout_count->inc();
2363 }
2364 _t_bailedout_compilation.add(time);
2365 } else if (code == NULL) {
2366 if (UsePerfData) {
2367 _perf_last_invalidated_method->set_value(counters->current_method());
2368 _perf_last_invalidated_type->set_value(counters->compile_type());
2369 _perf_total_invalidated_count->inc();
2370 }
2371 _total_invalidated_count++;
2372 _t_invalidated_compilation.add(time);
2373 } else {
2374 // Compilation succeeded
2375
2376 // update compilation ticks - used by the implementation of
2377 // java.lang.management.CompilationMBean
2378 _perf_total_compilation->inc(time.ticks());
2379 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2380
2381 if (CITime) {
2382 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2383 if (is_osr) {
2384 _t_osr_compilation.add(time);
2385 _sum_osr_bytes_compiled += bytes_compiled;
2386 } else {
2387 _t_standard_compilation.add(time);
2388 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2389 }
2390
2391 #if INCLUDE_JVMCI
2392 AbstractCompiler* comp = compiler(task->comp_level());
2393 if (comp) {
2394 CompilerStatistics* stats = comp->stats();
2395 if (stats) {
2396 if (is_osr) {
2397 stats->_osr.update(time, bytes_compiled);
2398 } else {
2399 stats->_standard.update(time, bytes_compiled);
2400 }
2401 stats->_nmethods_size += code->total_size();
2402 stats->_nmethods_code_size += code->insts_size();
2403 } else { // if (!stats)
2404 assert(false, "Compiler statistics object must exist");
2405 }
2406 } else { // if (!comp)
2407 assert(false, "Compiler object must exist");
2408 }
2409 #endif // INCLUDE_JVMCI
2410 }
2411
2412 if (UsePerfData) {
2413 // save the name of the last method compiled
2414 _perf_last_method->set_value(counters->current_method());
2415 _perf_last_compile_type->set_value(counters->compile_type());
2416 _perf_last_compile_size->set_value(method->code_size() +
2417 task->num_inlined_bytecodes());
2418 if (is_osr) {
2419 _perf_osr_compilation->inc(time.ticks());
2420 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2421 } else {
2422 _perf_standard_compilation->inc(time.ticks());
2423 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2424 }
2425 }
2426
2427 if (CITimeEach) {
2428 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2429 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2430 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2431 }
2432
2433 // Collect counts of successful compilations
2434 _sum_nmethod_size += code->total_size();
2435 _sum_nmethod_code_size += code->insts_size();
2436 _total_compile_count++;
2437
2438 if (UsePerfData) {
2439 _perf_sum_nmethod_size->inc( code->total_size());
2440 _perf_sum_nmethod_code_size->inc(code->insts_size());
2441 _perf_total_compile_count->inc();
2442 }
2443
2444 if (is_osr) {
2445 if (UsePerfData) _perf_total_osr_compile_count->inc();
2446 _total_osr_compile_count++;
2447 } else {
2448 if (UsePerfData) _perf_total_standard_compile_count->inc();
2449 _total_standard_compile_count++;
2450 }
2451 }
2452 // set the current method for the thread to null
2453 if (UsePerfData) counters->set_current_method("");
2454 }
2455
2456 const char* CompileBroker::compiler_name(int comp_level) {
2457 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2458 if (comp == NULL) {
2459 return "no compiler";
2460 } else {
2461 return (comp->name());
2462 }
2463 }
2464
2465 #if INCLUDE_JVMCI
2466 void CompileBroker::print_times(AbstractCompiler* comp) {
2467 CompilerStatistics* stats = comp->stats();
2468 if (stats) {
2469 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}",
2470 comp->name(), stats->bytes_per_second(),
2471 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2472 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2473 stats->_nmethods_size, stats->_nmethods_code_size);
2474 } else { // if (!stats)
2475 assert(false, "Compiler statistics object must exist");
2476 }
2477 comp->print_timers();
2478 }
2479 #endif // INCLUDE_JVMCI
2480
2481 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2482 #if INCLUDE_JVMCI
2483 elapsedTimer standard_compilation;
2484 elapsedTimer total_compilation;
2485 elapsedTimer osr_compilation;
2486
2487 int standard_bytes_compiled = 0;
2488 int osr_bytes_compiled = 0;
2489
2490 int standard_compile_count = 0;
2491 int osr_compile_count = 0;
2492 int total_compile_count = 0;
2493
2494 int nmethods_size = 0;
2495 int nmethods_code_size = 0;
2496 bool printedHeader = false;
2497
2498 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2499 AbstractCompiler* comp = _compilers[i];
2500 if (comp != NULL) {
2501 if (per_compiler && aggregate && !printedHeader) {
2502 printedHeader = true;
2503 tty->cr();
2504 tty->print_cr("Individual compiler times (for compiled methods only)");
2505 tty->print_cr("------------------------------------------------");
2506 tty->cr();
2507 }
2508 CompilerStatistics* stats = comp->stats();
2509
2510 if (stats) {
2511 standard_compilation.add(stats->_standard._time);
2512 osr_compilation.add(stats->_osr._time);
2513
2514 standard_bytes_compiled += stats->_standard._bytes;
2515 osr_bytes_compiled += stats->_osr._bytes;
2516
2517 standard_compile_count += stats->_standard._count;
2518 osr_compile_count += stats->_osr._count;
2519
2520 nmethods_size += stats->_nmethods_size;
2521 nmethods_code_size += stats->_nmethods_code_size;
2522 } else { // if (!stats)
2523 assert(false, "Compiler statistics object must exist");
2524 }
2525
2526 if (per_compiler) {
2527 print_times(comp);
2528 }
2529 }
2530 }
2531 total_compile_count = osr_compile_count + standard_compile_count;
2532 total_compilation.add(osr_compilation);
2533 total_compilation.add(standard_compilation);
2534
2535 // In hosted mode, print the JVMCI compiler specific counters manually.
2536 if (!UseJVMCICompiler) {
2537 JVMCICompiler::print_compilation_timers();
2538 }
2539 #else // INCLUDE_JVMCI
2540 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2541 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2542 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2543
2544 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2545 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2546
2547 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2548 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2549 int total_compile_count = CompileBroker::_total_compile_count;
2550
2551 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2552 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2553 #endif // INCLUDE_JVMCI
2554
2555 if (!aggregate) {
2556 return;
2557 }
2558 tty->cr();
2559 tty->print_cr("Accumulated compiler times");
2560 tty->print_cr("----------------------------------------------------------");
2561 //0000000000111111111122222222223333333333444444444455555555556666666666
2562 //0123456789012345678901234567890123456789012345678901234567890123456789
2563 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2564 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2565 standard_compilation.seconds(),
2566 standard_compilation.seconds() / standard_compile_count);
2567 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2568 CompileBroker::_t_bailedout_compilation.seconds(),
2569 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2570 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2571 osr_compilation.seconds(),
2572 osr_compilation.seconds() / osr_compile_count);
2573 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2574 CompileBroker::_t_invalidated_compilation.seconds(),
2575 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2576
2577 AbstractCompiler *comp = compiler(CompLevel_simple);
2578 if (comp != NULL) {
2579 tty->cr();
2580 comp->print_timers();
2581 }
2582 comp = compiler(CompLevel_full_optimization);
2583 if (comp != NULL) {
2584 tty->cr();
2585 comp->print_timers();
2586 }
2587 tty->cr();
2588 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2589 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2590 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2591 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2592 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2593 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2594 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2595 double tcs = total_compilation.seconds();
2596 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2597 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2598 tty->cr();
2599 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2600 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2601 }
2602
2603 // Debugging output for failure
2604 void CompileBroker::print_last_compile() {
2605 if (_last_compile_level != CompLevel_none &&
2606 compiler(_last_compile_level) != NULL &&
2607 _last_compile_type != no_compile) {
2608 if (_last_compile_type == osr_compile) {
2609 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2610 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2611 } else {
2612 tty->print_cr("Last parse: %d+++(%d) %s",
2613 _compilation_id, _last_compile_level, _last_method_compiled);
2614 }
2615 }
2616 }
2617
2618 // Print general/accumulated JIT information.
2619 void CompileBroker::print_info(outputStream *out) {
2620 if (out == NULL) out = tty;
2621 out->cr();
2622 out->print_cr("======================");
2623 out->print_cr(" General JIT info ");
2624 out->print_cr("======================");
2625 out->cr();
2626 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2627 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2628 out->cr();
2629 out->print_cr("CodeCache overview");
2630 out->print_cr("--------------------------------------------------------");
2631 out->cr();
2632 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2633 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2634 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2635 out->cr();
2636
2637 out->cr();
2638 out->print_cr("CodeCache cleaning overview");
2639 out->print_cr("--------------------------------------------------------");
2640 out->cr();
2641 NMethodSweeper::print(out);
2642 out->print_cr("--------------------------------------------------------");
2643 out->cr();
2644 }
2645
2646 // Note: tty_lock must not be held upon entry to this function.
2647 // Print functions called from herein do "micro-locking" on tty_lock.
2648 // That's a tradeoff which keeps together important blocks of output.
2649 // At the same time, continuous tty_lock hold time is kept in check,
2650 // preventing concurrently printing threads from stalling a long time.
2651 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2652 TimeStamp ts_total;
2653 TimeStamp ts;
2654
2655 bool allFun = !strcmp(function, "all");
2656 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2657 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2658 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2659 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2660 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2661 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2662 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2663 bool discard = !strcmp(function, "discard") || allFun;
2664
2665 if (out == NULL) {
2666 out = tty;
2667 }
2668
2669 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2670 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2671 out->cr();
2672 return;
2673 }
2674
2675 ts_total.update(); // record starting point
2676
2677 if (aggregate) {
2678 print_info(out);
2679 }
2680
2681 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2682 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function.
2683 // When we request individual parts of the analysis via the jcmd interface, it is possible
2684 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2685 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2686 // across user interaction.
2687 ts.update(); // record starting point
2688 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2689 out->cr();
2690 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds());
2691 out->cr();
2692
2693 if (aggregate) {
2694 // It is sufficient to hold the CodeCache_lock only for the aggregate step.
2695 // All other functions operate on aggregated data - except MethodNames, but that should be safe.
2696 // The separate CodeHeapStateAnalytics_lock protects the printing functions against
2697 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock.
2698 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2699 // leading to an unnecessarily long hold time of the CodeCache_lock.
2700 ts.update(); // record starting point
2701 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2702 out->cr();
2703 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds());
2704 out->cr();
2705
2706 ts.update(); // record starting point
2707 CodeCache::aggregate(out, granularity);
2708 out->cr();
2709 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds());
2710 out->cr();
2711 }
2712
2713 if (usedSpace) CodeCache::print_usedSpace(out);
2714 if (freeSpace) CodeCache::print_freeSpace(out);
2715 if (methodCount) CodeCache::print_count(out);
2716 if (methodSpace) CodeCache::print_space(out);
2717 if (methodAge) CodeCache::print_age(out);
2718 if (methodNames) CodeCache::print_names(out);
2719 if (discard) CodeCache::discard(out);
2720
2721 out->cr();
2722 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds());
2723 out->cr();
2724 }