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 "jfr/jfrEvents.hpp"
39 #include "logging/log.hpp"
40 #include "logging/logStream.hpp"
41 #include "memory/allocation.inline.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "oops/methodData.hpp"
44 #include "oops/method.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "prims/whitebox.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/atomic.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/init.hpp"
52 #include "runtime/interfaceSupport.inline.hpp"
53 #include "runtime/javaCalls.hpp"
54 #include "runtime/jniHandles.inline.hpp"
55 #include "runtime/os.hpp"
56 #include "runtime/safepointVerifiers.hpp"
57 #include "runtime/sharedRuntime.hpp"
58 #include "runtime/sweeper.hpp"
59 #include "runtime/timerTrace.hpp"
60 #include "runtime/vframe.inline.hpp"
61 #include "utilities/debug.hpp"
62 #include "utilities/dtrace.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/formatBuffer.hpp"
65 #include "utilities/macros.hpp"
66 #ifdef COMPILER1
67 #include "c1/c1_Compiler.hpp"
68 #endif
69 #if INCLUDE_JVMCI
70 #include "jvmci/jvmciCompiler.hpp"
71 #include "jvmci/jvmciRuntime.hpp"
72 #include "jvmci/jvmciJavaClasses.hpp"
73 #include "runtime/vframe.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "opto/c2compiler.hpp"
77 #endif
78
79 #ifdef DTRACE_ENABLED
80
81 // Only bother with this argument setup if dtrace is available
82
83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
84 { \
85 Symbol* klass_name = (method)->klass_name(); \
86 Symbol* name = (method)->name(); \
87 Symbol* signature = (method)->signature(); \
88 HOTSPOT_METHOD_COMPILE_BEGIN( \
89 (char *) comp_name, strlen(comp_name), \
90 (char *) klass_name->bytes(), klass_name->utf8_length(), \
91 (char *) name->bytes(), name->utf8_length(), \
92 (char *) signature->bytes(), signature->utf8_length()); \
93 }
94
95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_END( \
101 (char *) comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length(), (success)); \
105 }
106
107 #else // ndef DTRACE_ENABLED
108
109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
111
112 #endif // ndef DTRACE_ENABLED
113
114 bool CompileBroker::_initialized = false;
115 volatile bool CompileBroker::_should_block = false;
116 volatile int CompileBroker::_print_compilation_warning = 0;
117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
118
119 // The installed compiler(s)
120 AbstractCompiler* CompileBroker::_compilers[2];
121
122 // The maximum numbers of compiler threads to be determined during startup.
123 int CompileBroker::_c1_count = 0;
124 int CompileBroker::_c2_count = 0;
125
126 // An array of compiler names as Java String objects
127 jobject* CompileBroker::_compiler1_objects = NULL;
128 jobject* CompileBroker::_compiler2_objects = NULL;
129
130 CompileLog** CompileBroker::_compiler1_logs = NULL;
131 CompileLog** CompileBroker::_compiler2_logs = NULL;
132
133 // These counters are used to assign an unique ID to each compilation.
134 volatile jint CompileBroker::_compilation_id = 0;
135 volatile jint CompileBroker::_osr_compilation_id = 0;
136
137 // Debugging information
138 int CompileBroker::_last_compile_type = no_compile;
139 int CompileBroker::_last_compile_level = CompLevel_none;
140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
141
142 // Performance counters
143 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
146
147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
152
153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
157
158 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
165
166 // Timers and counters for generating statistics
167 elapsedTimer CompileBroker::_t_total_compilation;
168 elapsedTimer CompileBroker::_t_osr_compilation;
169 elapsedTimer CompileBroker::_t_standard_compilation;
170 elapsedTimer CompileBroker::_t_invalidated_compilation;
171 elapsedTimer CompileBroker::_t_bailedout_compilation;
172
173 int CompileBroker::_total_bailout_count = 0;
174 int CompileBroker::_total_invalidated_count = 0;
175 int CompileBroker::_total_compile_count = 0;
176 int CompileBroker::_total_osr_compile_count = 0;
177 int CompileBroker::_total_standard_compile_count = 0;
178 int CompileBroker::_total_compiler_stopped_count = 0;
179 int CompileBroker::_total_compiler_restarted_count = 0;
180
181 int CompileBroker::_sum_osr_bytes_compiled = 0;
182 int CompileBroker::_sum_standard_bytes_compiled = 0;
183 int CompileBroker::_sum_nmethod_size = 0;
184 int CompileBroker::_sum_nmethod_code_size = 0;
185
186 long CompileBroker::_peak_compilation_time = 0;
187
188 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
189 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
190
191
192
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
197
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream sstr = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print(&sstr, NULL, true, false);
203 log(thread, "%s", (const char*)lm);
204 }
205
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm->compile_id(), nm->is_osr_method() ? "%" : "",
209 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
210 }
211
212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
213 StringLogMessage lm;
214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
215 if (retry_message != NULL) {
216 lm.append(" (%s)", retry_message);
217 }
218 lm.print("\n");
219 log(thread, "%s", (const char*)lm);
220 }
221
222 void log_metaspace_failure(const char* reason) {
223 ResourceMark rm;
224 StringLogMessage lm;
225 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
226 lm.print("\n");
227 log(JavaThread::current(), "%s", (const char*)lm);
228 }
229 };
230
231 static CompilationLog* _compilation_log = NULL;
232
233 bool compileBroker_init() {
234 if (LogEvents) {
235 _compilation_log = new CompilationLog();
236 }
237
238 // init directives stack, adding default directive
239 DirectivesStack::init();
240
241 if (DirectivesParser::has_file()) {
242 return DirectivesParser::parse_from_flag();
243 } else if (CompilerDirectivesPrint) {
244 // Print default directive even when no other was added
245 DirectivesStack::print(tty);
246 }
247
248 return true;
249 }
250
251 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
252 CompilerThread* thread = CompilerThread::current();
253 thread->set_task(task);
254 #if INCLUDE_JVMCI
255 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
256 task->set_jvmci_compiler_thread(thread);
257 }
258 #endif
259 CompileLog* log = thread->log();
260 if (log != NULL) task->log_task_start(log);
261 }
262
263 CompileTaskWrapper::~CompileTaskWrapper() {
264 CompilerThread* thread = CompilerThread::current();
265 CompileTask* task = thread->task();
266 CompileLog* log = thread->log();
267 if (log != NULL) task->log_task_done(log);
268 thread->set_task(NULL);
269 task->set_code_handle(NULL);
270 thread->set_env(NULL);
271 if (task->is_blocking()) {
272 bool free_task = false;
273 {
274 MutexLocker notifier(task->lock(), thread);
275 task->mark_complete();
276 #if INCLUDE_JVMCI
277 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
278 if (!task->has_waiter()) {
279 // The waiting thread timed out and thus did not free the task.
280 free_task = true;
281 }
282 task->set_jvmci_compiler_thread(NULL);
283 }
284 #endif
285 if (!free_task) {
286 // Notify the waiting thread that the compilation has completed
287 // so that it can free the task.
288 task->lock()->notify_all();
289 }
290 }
291 if (free_task) {
292 // The task can only be freed once the task lock is released.
293 CompileTask::free(task);
294 }
295 } else {
296 task->mark_complete();
297
298 // By convention, the compiling thread is responsible for
299 // recycling a non-blocking CompileTask.
300 CompileTask::free(task);
301 }
302 }
303
304 /**
305 * Check if a CompilerThread can be removed and update count if requested.
306 */
307 static bool can_remove(CompilerThread *ct, bool do_it) {
308 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
309 if (!ReduceNumberOfCompilerThreads) return false;
310
311 AbstractCompiler *compiler = ct->compiler();
312 int compiler_count = compiler->num_compiler_threads();
313 bool c1 = compiler->is_c1();
314
315 // Keep at least 1 compiler thread of each type.
316 if (compiler_count < 2) return false;
317
318 // Keep thread alive for at least some time.
319 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
320
321 // We only allow the last compiler thread of each type to get removed.
322 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
323 : CompileBroker::compiler2_object(compiler_count - 1);
324 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
325 if (do_it) {
326 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
327 compiler->set_num_compiler_threads(compiler_count - 1);
328 }
329 return true;
330 }
331 return false;
332 }
333
334 /**
335 * Add a CompileTask to a CompileQueue.
336 */
337 void CompileQueue::add(CompileTask* task) {
338 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
339
340 task->set_next(NULL);
341 task->set_prev(NULL);
342
343 if (_last == NULL) {
344 // The compile queue is empty.
345 assert(_first == NULL, "queue is empty");
346 _first = task;
347 _last = task;
348 } else {
349 // Append the task to the queue.
350 assert(_last->next() == NULL, "not last");
351 _last->set_next(task);
352 task->set_prev(_last);
353 _last = task;
354 }
355 ++_size;
356
357 // Mark the method as being in the compile queue.
358 task->method()->set_queued_for_compilation();
359
360 if (CIPrintCompileQueue) {
361 print_tty();
362 }
363
364 if (LogCompilation && xtty != NULL) {
365 task->log_task_queued();
366 }
367
368 // Notify CompilerThreads that a task is available.
369 MethodCompileQueue_lock->notify_all();
370 }
371
372 /**
373 * Empties compilation queue by putting all compilation tasks onto
374 * a freelist. Furthermore, the method wakes up all threads that are
375 * waiting on a compilation task to finish. This can happen if background
376 * compilation is disabled.
377 */
378 void CompileQueue::free_all() {
379 MutexLocker mu(MethodCompileQueue_lock);
380 CompileTask* next = _first;
381
382 // Iterate over all tasks in the compile queue
383 while (next != NULL) {
384 CompileTask* current = next;
385 next = current->next();
386 {
387 // Wake up thread that blocks on the compile task.
388 MutexLocker ct_lock(current->lock());
389 current->lock()->notify();
390 }
391 // Put the task back on the freelist.
392 CompileTask::free(current);
393 }
394 _first = NULL;
395
396 // Wake up all threads that block on the queue.
397 MethodCompileQueue_lock->notify_all();
398 }
399
400 /**
401 * Get the next CompileTask from a CompileQueue
402 */
403 CompileTask* CompileQueue::get() {
404 // save methods from RedefineClasses across safepoint
405 // across MethodCompileQueue_lock below.
406 methodHandle save_method;
407 methodHandle save_hot_method;
408
409 MutexLocker locker(MethodCompileQueue_lock);
410 // If _first is NULL we have no more compile jobs. There are two reasons for
411 // having no compile jobs: First, we compiled everything we wanted. Second,
412 // we ran out of code cache so compilation has been disabled. In the latter
413 // case we perform code cache sweeps to free memory such that we can re-enable
414 // compilation.
415 while (_first == NULL) {
416 // Exit loop if compilation is disabled forever
417 if (CompileBroker::is_compilation_disabled_forever()) {
418 return NULL;
419 }
420
421 // If there are no compilation tasks and we can compile new jobs
422 // (i.e., there is enough free space in the code cache) there is
423 // no need to invoke the sweeper. As a result, the hotness of methods
424 // remains unchanged. This behavior is desired, since we want to keep
425 // the stable state, i.e., we do not want to evict methods from the
426 // code cache if it is unnecessary.
427 // We need a timed wait here, since compiler threads can exit if compilation
428 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
429 // is not critical and we do not want idle compiler threads to wake up too often.
430 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
431
432 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
433 // Still nothing to compile. Give caller a chance to stop this thread.
434 if (can_remove(CompilerThread::current(), false)) return NULL;
435 }
436 }
437
438 if (CompileBroker::is_compilation_disabled_forever()) {
439 return NULL;
440 }
441
442 CompileTask* task;
443 {
444 NoSafepointVerifier nsv;
445 task = CompilationPolicy::policy()->select_task(this);
446 }
447
448 if (task != NULL) {
449 // Save method pointers across unlock safepoint. The task is removed from
450 // the compilation queue, which is walked during RedefineClasses.
451 save_method = methodHandle(task->method());
452 save_hot_method = methodHandle(task->hot_method());
453
454 remove(task);
455 purge_stale_tasks(); // may temporarily release MCQ lock
456 }
457
458 return task;
459 }
460
461 // Clean & deallocate stale compile tasks.
462 // Temporarily releases MethodCompileQueue lock.
463 void CompileQueue::purge_stale_tasks() {
464 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
465 if (_first_stale != NULL) {
466 // Stale tasks are purged when MCQ lock is released,
467 // but _first_stale updates are protected by MCQ lock.
468 // Once task processing starts and MCQ lock is released,
469 // other compiler threads can reuse _first_stale.
470 CompileTask* head = _first_stale;
471 _first_stale = NULL;
472 {
473 MutexUnlocker ul(MethodCompileQueue_lock);
474 for (CompileTask* task = head; task != NULL; ) {
475 CompileTask* next_task = task->next();
476 CompileTaskWrapper ctw(task); // Frees the task
477 task->set_failure_reason("stale task");
478 task = next_task;
479 }
480 }
481 }
482 }
483
484 void CompileQueue::remove(CompileTask* task) {
485 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
486 if (task->prev() != NULL) {
487 task->prev()->set_next(task->next());
488 } else {
489 // max is the first element
490 assert(task == _first, "Sanity");
491 _first = task->next();
492 }
493
494 if (task->next() != NULL) {
495 task->next()->set_prev(task->prev());
496 } else {
497 // max is the last element
498 assert(task == _last, "Sanity");
499 _last = task->prev();
500 }
501 --_size;
502 }
503
504 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
505 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
506 remove(task);
507
508 // Enqueue the task for reclamation (should be done outside MCQ lock)
509 task->set_next(_first_stale);
510 task->set_prev(NULL);
511 _first_stale = task;
512 }
513
514 // methods in the compile queue need to be marked as used on the stack
515 // so that they don't get reclaimed by Redefine Classes
516 void CompileQueue::mark_on_stack() {
517 CompileTask* task = _first;
518 while (task != NULL) {
519 task->mark_on_stack();
520 task = task->next();
521 }
522 }
523
524
525 CompileQueue* CompileBroker::compile_queue(int comp_level) {
526 if (is_c2_compile(comp_level)) return _c2_compile_queue;
527 if (is_c1_compile(comp_level)) return _c1_compile_queue;
528 return NULL;
529 }
530
531 void CompileBroker::print_compile_queues(outputStream* st) {
532 st->print_cr("Current compiles: ");
533
534 char buf[2000];
535 int buflen = sizeof(buf);
536 Threads::print_threads_compiling(st, buf, buflen);
537
538 st->cr();
539 if (_c1_compile_queue != NULL) {
540 _c1_compile_queue->print(st);
541 }
542 if (_c2_compile_queue != NULL) {
543 _c2_compile_queue->print(st);
544 }
545 }
546
547 void CompileQueue::print(outputStream* st) {
548 assert_locked_or_safepoint(MethodCompileQueue_lock);
549 st->print_cr("%s:", name());
550 CompileTask* task = _first;
551 if (task == NULL) {
552 st->print_cr("Empty");
553 } else {
554 while (task != NULL) {
555 task->print(st, NULL, true, true);
556 task = task->next();
557 }
558 }
559 st->cr();
560 }
561
562 void CompileQueue::print_tty() {
563 ttyLocker ttyl;
564 print(tty);
565 }
566
567 CompilerCounters::CompilerCounters() {
568 _current_method[0] = '\0';
569 _compile_type = CompileBroker::no_compile;
570 }
571
572 // ------------------------------------------------------------------
573 // CompileBroker::compilation_init
574 //
575 // Initialize the Compilation object
576 void CompileBroker::compilation_init_phase1(TRAPS) {
577 _last_method_compiled[0] = '\0';
578
579 // No need to initialize compilation system if we do not use it.
580 if (!UseCompiler) {
581 return;
582 }
583 // Set the interface to the current compiler(s).
584 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
585 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
586
587 #if INCLUDE_JVMCI
588 if (EnableJVMCI) {
589 // This is creating a JVMCICompiler singleton.
590 JVMCICompiler* jvmci = new JVMCICompiler();
591
592 if (UseJVMCICompiler) {
593 _compilers[1] = jvmci;
594 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
595 if (BootstrapJVMCI) {
596 // JVMCI will bootstrap so give it more threads
597 _c2_count = MIN2(32, os::active_processor_count());
598 }
599 } else {
600 _c2_count = JVMCIThreads;
601 }
602 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
603 } else {
604 _c1_count = JVMCIHostThreads;
605 }
606 }
607 }
608 #endif // INCLUDE_JVMCI
609
610 #ifdef COMPILER1
611 if (_c1_count > 0) {
612 _compilers[0] = new Compiler();
613 }
614 #endif // COMPILER1
615
616 #ifdef COMPILER2
617 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
618 if (_c2_count > 0) {
619 _compilers[1] = new C2Compiler();
620 }
621 }
622 #endif // COMPILER2
623
624 // Start the compiler thread(s) and the sweeper thread
625 init_compiler_sweeper_threads();
626 // totalTime performance counter is always created as it is required
627 // by the implementation of java.lang.management.CompilationMBean.
628 {
629 EXCEPTION_MARK;
630 _perf_total_compilation =
631 PerfDataManager::create_counter(JAVA_CI, "totalTime",
632 PerfData::U_Ticks, CHECK);
633 }
634
635 if (UsePerfData) {
636
637 EXCEPTION_MARK;
638
639 // create the jvmstat performance counters
640 _perf_osr_compilation =
641 PerfDataManager::create_counter(SUN_CI, "osrTime",
642 PerfData::U_Ticks, CHECK);
643
644 _perf_standard_compilation =
645 PerfDataManager::create_counter(SUN_CI, "standardTime",
646 PerfData::U_Ticks, CHECK);
647
648 _perf_total_bailout_count =
649 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
650 PerfData::U_Events, CHECK);
651
652 _perf_total_invalidated_count =
653 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
654 PerfData::U_Events, CHECK);
655
656 _perf_total_compile_count =
657 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
658 PerfData::U_Events, CHECK);
659 _perf_total_osr_compile_count =
660 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
661 PerfData::U_Events, CHECK);
662
663 _perf_total_standard_compile_count =
664 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
665 PerfData::U_Events, CHECK);
666
667 _perf_sum_osr_bytes_compiled =
668 PerfDataManager::create_counter(SUN_CI, "osrBytes",
669 PerfData::U_Bytes, CHECK);
670
671 _perf_sum_standard_bytes_compiled =
672 PerfDataManager::create_counter(SUN_CI, "standardBytes",
673 PerfData::U_Bytes, CHECK);
674
675 _perf_sum_nmethod_size =
676 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
677 PerfData::U_Bytes, CHECK);
678
679 _perf_sum_nmethod_code_size =
680 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
681 PerfData::U_Bytes, CHECK);
682
683 _perf_last_method =
684 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
685 CompilerCounters::cmname_buffer_length,
686 "", CHECK);
687
688 _perf_last_failed_method =
689 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
690 CompilerCounters::cmname_buffer_length,
691 "", CHECK);
692
693 _perf_last_invalidated_method =
694 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
695 CompilerCounters::cmname_buffer_length,
696 "", CHECK);
697
698 _perf_last_compile_type =
699 PerfDataManager::create_variable(SUN_CI, "lastType",
700 PerfData::U_None,
701 (jlong)CompileBroker::no_compile,
702 CHECK);
703
704 _perf_last_compile_size =
705 PerfDataManager::create_variable(SUN_CI, "lastSize",
706 PerfData::U_Bytes,
707 (jlong)CompileBroker::no_compile,
708 CHECK);
709
710
711 _perf_last_failed_type =
712 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
713 PerfData::U_None,
714 (jlong)CompileBroker::no_compile,
715 CHECK);
716
717 _perf_last_invalidated_type =
718 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
719 PerfData::U_None,
720 (jlong)CompileBroker::no_compile,
721 CHECK);
722 }
723 }
724
725 // Completes compiler initialization. Compilation requests submitted
726 // prior to this will be silently ignored.
727 void CompileBroker::compilation_init_phase2() {
728 _initialized = true;
729 }
730
731 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
732 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
733 Handle thread_group(THREAD, Universe::system_thread_group());
734 return JavaCalls::construct_new_instance(
735 SystemDictionary::Thread_klass(),
736 vmSymbols::threadgroup_string_void_signature(),
737 thread_group,
738 string,
739 CHECK_NH);
740 }
741
742
743 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) {
744 JavaThread* thread = NULL;
745 {
746 MutexLocker mu(Threads_lock, THREAD);
747 if (comp != NULL) {
748 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
749 CompilerCounters* counters = new CompilerCounters();
750 thread = new CompilerThread(queue, counters);
751 }
752 } else {
753 thread = new CodeCacheSweeperThread();
754 }
755 // At this point the new CompilerThread data-races with this startup
756 // thread (which I believe is the primoridal thread and NOT the VM
757 // thread). This means Java bytecodes being executed at startup can
758 // queue compile jobs which will run at whatever default priority the
759 // newly created CompilerThread runs at.
760
761
762 // At this point it may be possible that no osthread was created for the
763 // JavaThread due to lack of memory. We would have to throw an exception
764 // in that case. However, since this must work and we do not allow
765 // exceptions anyway, check and abort if this fails. But first release the
766 // lock.
767
768 if (thread != NULL && thread->osthread() != NULL) {
769
770 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
771
772 // Note that this only sets the JavaThread _priority field, which by
773 // definition is limited to Java priorities and not OS priorities.
774 // The os-priority is set in the CompilerThread startup code itself
775
776 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
777
778 // Note that we cannot call os::set_priority because it expects Java
779 // priorities and we are *explicitly* using OS priorities so that it's
780 // possible to set the compiler thread priority higher than any Java
781 // thread.
782
783 int native_prio = CompilerThreadPriority;
784 if (native_prio == -1) {
785 if (UseCriticalCompilerThreadPriority) {
786 native_prio = os::java_to_os_priority[CriticalPriority];
787 } else {
788 native_prio = os::java_to_os_priority[NearMaxPriority];
789 }
790 }
791 os::set_native_priority(thread, native_prio);
792
793 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
794
795 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
796 if (comp != NULL) {
797 thread->as_CompilerThread()->set_compiler(comp);
798 }
799 Threads::add(thread);
800 Thread::start(thread);
801 }
802 }
803
804 // First release lock before aborting VM.
805 if (thread == NULL || thread->osthread() == NULL) {
806 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
807 if (thread != NULL) {
808 thread->smr_delete();
809 }
810 return NULL;
811 }
812 vm_exit_during_initialization("java.lang.OutOfMemoryError",
813 os::native_thread_creation_failed_msg());
814 }
815
816 // Let go of Threads_lock before yielding
817 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
818
819 return thread;
820 }
821
822
823 void CompileBroker::init_compiler_sweeper_threads() {
824 EXCEPTION_MARK;
825 #if !defined(ZERO)
826 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
827 #endif // !ZERO
828 // Initialize the compilation queue
829 if (_c2_count > 0) {
830 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
831 _c2_compile_queue = new CompileQueue(name);
832 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
833 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
834 }
835 if (_c1_count > 0) {
836 _c1_compile_queue = new CompileQueue("C1 compile queue");
837 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
838 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
839 }
840
841 char name_buffer[256];
842
843 for (int i = 0; i < _c2_count; i++) {
844 // Create a name for our thread.
845 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
846 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
847 jobject thread_handle = JNIHandles::make_global(thread_oop);
848 _compiler2_objects[i] = thread_handle;
849 _compiler2_logs[i] = NULL;
850
851 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
852 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK);
853 assert(ct != NULL, "should have been handled for initial thread");
854 _compilers[1]->set_num_compiler_threads(i + 1);
855 if (TraceCompilerThreads) {
856 ResourceMark rm;
857 MutexLocker mu(Threads_lock);
858 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
859 }
860 }
861 }
862
863 for (int i = 0; i < _c1_count; i++) {
864 // Create a name for our thread.
865 sprintf(name_buffer, "C1 CompilerThread%d", i);
866 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
867 jobject thread_handle = JNIHandles::make_global(thread_oop);
868 _compiler1_objects[i] = thread_handle;
869 _compiler1_logs[i] = NULL;
870
871 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
872 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK);
873 assert(ct != NULL, "should have been handled for initial thread");
874 _compilers[0]->set_num_compiler_threads(i + 1);
875 if (TraceCompilerThreads) {
876 ResourceMark rm;
877 MutexLocker mu(Threads_lock);
878 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
879 }
880 }
881 }
882
883 if (UsePerfData) {
884 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
885 }
886
887 if (MethodFlushing) {
888 // Initialize the sweeper thread
889 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
890 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
891 make_thread(thread_handle, NULL, NULL, CHECK);
892 }
893 }
894
895 void CompileBroker::possibly_add_compiler_threads() {
896 EXCEPTION_MARK;
897
898 julong available_memory = os::available_memory();
899 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
900 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
901 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
902
903 // Only do attempt to start additional threads if the lock is free.
904 if (!CompileThread_lock->try_lock()) return;
905
906 if (_c2_compile_queue != NULL) {
907 int old_c2_count = _compilers[1]->num_compiler_threads();
908 int new_c2_count = MIN4(_c2_count,
909 _c2_compile_queue->size() / 2,
910 (int)(available_memory / (200*M)),
911 (int)(available_cc_np / (128*K)));
912
913 for (int i = old_c2_count; i < new_c2_count; i++) {
914 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK);
915 if (ct == NULL) break;
916 _compilers[1]->set_num_compiler_threads(i + 1);
917 if (TraceCompilerThreads) {
918 ResourceMark rm;
919 MutexLocker mu(Threads_lock);
920 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
921 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
922 }
923 }
924 }
925
926 if (_c1_compile_queue != NULL) {
927 int old_c1_count = _compilers[0]->num_compiler_threads();
928 int new_c1_count = MIN4(_c1_count,
929 _c1_compile_queue->size() / 4,
930 (int)(available_memory / (100*M)),
931 (int)(available_cc_p / (128*K)));
932
933 for (int i = old_c1_count; i < new_c1_count; i++) {
934 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK);
935 if (ct == NULL) break;
936 _compilers[0]->set_num_compiler_threads(i + 1);
937 if (TraceCompilerThreads) {
938 ResourceMark rm;
939 MutexLocker mu(Threads_lock);
940 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
941 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
942 }
943 }
944 }
945
946 CompileThread_lock->unlock();
947 }
948
949
950 /**
951 * Set the methods on the stack as on_stack so that redefine classes doesn't
952 * reclaim them. This method is executed at a safepoint.
953 */
954 void CompileBroker::mark_on_stack() {
955 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
956 // Since we are at a safepoint, we do not need a lock to access
957 // the compile queues.
958 if (_c2_compile_queue != NULL) {
959 _c2_compile_queue->mark_on_stack();
960 }
961 if (_c1_compile_queue != NULL) {
962 _c1_compile_queue->mark_on_stack();
963 }
964 }
965
966 // ------------------------------------------------------------------
967 // CompileBroker::compile_method
968 //
969 // Request compilation of a method.
970 void CompileBroker::compile_method_base(const methodHandle& method,
971 int osr_bci,
972 int comp_level,
973 const methodHandle& hot_method,
974 int hot_count,
975 CompileTask::CompileReason compile_reason,
976 bool blocking,
977 Thread* thread) {
978 guarantee(!method->is_abstract(), "cannot compile abstract methods");
979 assert(method->method_holder()->is_instance_klass(),
980 "sanity check");
981 assert(!method->method_holder()->is_not_initialized(),
982 "method holder must be initialized");
983 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
984
985 if (CIPrintRequests) {
986 tty->print("request: ");
987 method->print_short_name(tty);
988 if (osr_bci != InvocationEntryBci) {
989 tty->print(" osr_bci: %d", osr_bci);
990 }
991 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
992 if (!hot_method.is_null()) {
993 tty->print(" hot: ");
994 if (hot_method() != method()) {
995 hot_method->print_short_name(tty);
996 } else {
997 tty->print("yes");
998 }
999 }
1000 tty->cr();
1001 }
1002
1003 // A request has been made for compilation. Before we do any
1004 // real work, check to see if the method has been compiled
1005 // in the meantime with a definitive result.
1006 if (compilation_is_complete(method, osr_bci, comp_level)) {
1007 return;
1008 }
1009
1010 #ifndef PRODUCT
1011 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1012 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1013 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1014 return;
1015 }
1016 }
1017 #endif
1018
1019 // If this method is already in the compile queue, then
1020 // we do not block the current thread.
1021 if (compilation_is_in_queue(method)) {
1022 // We may want to decay our counter a bit here to prevent
1023 // multiple denied requests for compilation. This is an
1024 // open compilation policy issue. Note: The other possibility,
1025 // in the case that this is a blocking compile request, is to have
1026 // all subsequent blocking requesters wait for completion of
1027 // ongoing compiles. Note that in this case we'll need a protocol
1028 // for freeing the associated compile tasks. [Or we could have
1029 // a single static monitor on which all these waiters sleep.]
1030 return;
1031 }
1032
1033 if (TieredCompilation) {
1034 // Tiered policy requires MethodCounters to exist before adding a method to
1035 // the queue. Create if we don't have them yet.
1036 method->get_method_counters(thread);
1037 }
1038
1039 // Outputs from the following MutexLocker block:
1040 CompileTask* task = NULL;
1041 CompileQueue* queue = compile_queue(comp_level);
1042
1043 // Acquire our lock.
1044 {
1045 MutexLocker locker(MethodCompileQueue_lock, thread);
1046
1047 // Make sure the method has not slipped into the queues since
1048 // last we checked; note that those checks were "fast bail-outs".
1049 // Here we need to be more careful, see 14012000 below.
1050 if (compilation_is_in_queue(method)) {
1051 return;
1052 }
1053
1054 // We need to check again to see if the compilation has
1055 // completed. A previous compilation may have registered
1056 // some result.
1057 if (compilation_is_complete(method, osr_bci, comp_level)) {
1058 return;
1059 }
1060
1061 // We now know that this compilation is not pending, complete,
1062 // or prohibited. Assign a compile_id to this compilation
1063 // and check to see if it is in our [Start..Stop) range.
1064 int compile_id = assign_compile_id(method, osr_bci);
1065 if (compile_id == 0) {
1066 // The compilation falls outside the allowed range.
1067 return;
1068 }
1069
1070 #if INCLUDE_JVMCI
1071 if (UseJVMCICompiler) {
1072 if (blocking) {
1073 // Don't allow blocking compiles for requests triggered by JVMCI.
1074 if (thread->is_Compiler_thread()) {
1075 blocking = false;
1076 }
1077
1078 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1079 vframeStream vfst((JavaThread*) thread);
1080 for (; !vfst.at_end(); vfst.next()) {
1081 if (vfst.method()->is_static_initializer() ||
1082 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1083 vfst.method()->name() == vmSymbols::loadClass_name())) {
1084 blocking = false;
1085 break;
1086 }
1087 }
1088
1089 // Don't allow blocking compilation requests to JVMCI
1090 // if JVMCI itself is not yet initialized
1091 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
1092 blocking = false;
1093 }
1094
1095 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1096 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1097 // such as the DestroyJavaVM thread.
1098 if (JVMCIRuntime::shutdown_called()) {
1099 blocking = false;
1100 }
1101 }
1102 }
1103 #endif // INCLUDE_JVMCI
1104
1105 // We will enter the compilation in the queue.
1106 // 14012000: Note that this sets the queued_for_compile bits in
1107 // the target method. We can now reason that a method cannot be
1108 // queued for compilation more than once, as follows:
1109 // Before a thread queues a task for compilation, it first acquires
1110 // the compile queue lock, then checks if the method's queued bits
1111 // are set or it has already been compiled. Thus there can not be two
1112 // instances of a compilation task for the same method on the
1113 // compilation queue. Consider now the case where the compilation
1114 // thread has already removed a task for that method from the queue
1115 // and is in the midst of compiling it. In this case, the
1116 // queued_for_compile bits must be set in the method (and these
1117 // will be visible to the current thread, since the bits were set
1118 // under protection of the compile queue lock, which we hold now.
1119 // When the compilation completes, the compiler thread first sets
1120 // the compilation result and then clears the queued_for_compile
1121 // bits. Neither of these actions are protected by a barrier (or done
1122 // under the protection of a lock), so the only guarantee we have
1123 // (on machines with TSO (Total Store Order)) is that these values
1124 // will update in that order. As a result, the only combinations of
1125 // these bits that the current thread will see are, in temporal order:
1126 // <RESULT, QUEUE> :
1127 // <0, 1> : in compile queue, but not yet compiled
1128 // <1, 1> : compiled but queue bit not cleared
1129 // <1, 0> : compiled and queue bit cleared
1130 // Because we first check the queue bits then check the result bits,
1131 // we are assured that we cannot introduce a duplicate task.
1132 // Note that if we did the tests in the reverse order (i.e. check
1133 // result then check queued bit), we could get the result bit before
1134 // the compilation completed, and the queue bit after the compilation
1135 // completed, and end up introducing a "duplicate" (redundant) task.
1136 // In that case, the compiler thread should first check if a method
1137 // has already been compiled before trying to compile it.
1138 // NOTE: in the event that there are multiple compiler threads and
1139 // there is de-optimization/recompilation, things will get hairy,
1140 // and in that case it's best to protect both the testing (here) of
1141 // these bits, and their updating (here and elsewhere) under a
1142 // common lock.
1143 task = create_compile_task(queue,
1144 compile_id, method,
1145 osr_bci, comp_level,
1146 hot_method, hot_count, compile_reason,
1147 blocking);
1148 }
1149
1150 if (blocking) {
1151 wait_for_completion(task);
1152 }
1153 }
1154
1155 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1156 int comp_level,
1157 const methodHandle& hot_method, int hot_count,
1158 CompileTask::CompileReason compile_reason,
1159 Thread* THREAD) {
1160 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1161 if (!_initialized || comp_level == CompLevel_none) {
1162 return NULL;
1163 }
1164
1165 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1166 assert(comp != NULL, "Ensure we have a compiler");
1167
1168 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1169 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1170 DirectivesStack::release(directive);
1171 return nm;
1172 }
1173
1174 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1175 int comp_level,
1176 const methodHandle& hot_method, int hot_count,
1177 CompileTask::CompileReason compile_reason,
1178 DirectiveSet* directive,
1179 Thread* THREAD) {
1180
1181 // make sure arguments make sense
1182 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1183 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1184 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1185 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1186 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1187 // allow any levels for WhiteBox
1188 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1189 // return quickly if possible
1190
1191 // Lambda forms with an Object in their signature can be passed a
1192 // value type. If compiled as root of a compilation, C2 has no way
1193 // to know a value type is passed.
1194 if (ValueTypePassFieldsAsArgs && method->is_compiled_lambda_form()) {
1195 ResourceMark rm;
1196 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) {
1197 if (ss.type() == T_VALUETYPE) {
1198 return NULL;
1199 }
1200 }
1201 }
1202
1203 // lock, make sure that the compilation
1204 // isn't prohibited in a straightforward way.
1205 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1206 if (comp == NULL || !comp->can_compile_method(method) ||
1207 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1208 return NULL;
1209 }
1210
1211 #if INCLUDE_JVMCI
1212 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1213 return NULL;
1214 }
1215 #endif
1216
1217 if (osr_bci == InvocationEntryBci) {
1218 // standard compilation
1219 CompiledMethod* method_code = method->code();
1220 if (method_code != NULL && method_code->is_nmethod()) {
1221 if (compilation_is_complete(method, osr_bci, comp_level)) {
1222 return (nmethod*) method_code;
1223 }
1224 }
1225 if (method->is_not_compilable(comp_level)) {
1226 return NULL;
1227 }
1228 } else {
1229 // osr compilation
1230 #ifndef TIERED
1231 // seems like an assert of dubious value
1232 assert(comp_level == CompLevel_highest_tier,
1233 "all OSR compiles are assumed to be at a single compilation level");
1234 #endif // TIERED
1235 // We accept a higher level osr method
1236 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1237 if (nm != NULL) return nm;
1238 if (method->is_not_osr_compilable(comp_level)) return NULL;
1239 }
1240
1241 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1242 // some prerequisites that are compiler specific
1243 if (comp->is_c2()) {
1244 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1245 // Resolve all classes seen in the signature of the method
1246 // we are compiling.
1247 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1248 }
1249
1250 // If the method is native, do the lookup in the thread requesting
1251 // the compilation. Native lookups can load code, which is not
1252 // permitted during compilation.
1253 //
1254 // Note: A native method implies non-osr compilation which is
1255 // checked with an assertion at the entry of this method.
1256 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1257 bool in_base_library;
1258 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1259 if (HAS_PENDING_EXCEPTION) {
1260 // In case of an exception looking up the method, we just forget
1261 // about it. The interpreter will kick-in and throw the exception.
1262 method->set_not_compilable(); // implies is_not_osr_compilable()
1263 CLEAR_PENDING_EXCEPTION;
1264 return NULL;
1265 }
1266 assert(method->has_native_function(), "must have native code by now");
1267 }
1268
1269 // RedefineClasses() has replaced this method; just return
1270 if (method->is_old()) {
1271 return NULL;
1272 }
1273
1274 // JVMTI -- post_compile_event requires jmethod_id() that may require
1275 // a lock the compiling thread can not acquire. Prefetch it here.
1276 if (JvmtiExport::should_post_compiled_method_load()) {
1277 method->jmethod_id();
1278 }
1279
1280 // do the compilation
1281 if (method->is_native()) {
1282 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1283 // The following native methods:
1284 //
1285 // java.lang.Float.intBitsToFloat
1286 // java.lang.Float.floatToRawIntBits
1287 // java.lang.Double.longBitsToDouble
1288 // java.lang.Double.doubleToRawLongBits
1289 //
1290 // are called through the interpreter even if interpreter native stubs
1291 // are not preferred (i.e., calling through adapter handlers is preferred).
1292 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1293 // if the version of the methods from the native libraries is called.
1294 // As the interpreter and the C2-intrinsified version of the methods preserves
1295 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1296 if ((UseSSE >= 1 &&
1297 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1298 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1299 (UseSSE >= 2 &&
1300 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1301 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1302 return NULL;
1303 }
1304
1305 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1306 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1307 //
1308 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1309 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1310 AdapterHandlerLibrary::create_native_wrapper(method);
1311 } else {
1312 return NULL;
1313 }
1314 } else {
1315 // If the compiler is shut off due to code cache getting full
1316 // fail out now so blocking compiles dont hang the java thread
1317 if (!should_compile_new_jobs()) {
1318 CompilationPolicy::policy()->delay_compilation(method());
1319 return NULL;
1320 }
1321 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1322 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1323 }
1324
1325 // return requested nmethod
1326 // We accept a higher level osr method
1327 if (osr_bci == InvocationEntryBci) {
1328 CompiledMethod* code = method->code();
1329 if (code == NULL) {
1330 return (nmethod*) code;
1331 } else {
1332 return code->as_nmethod_or_null();
1333 }
1334 }
1335 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1336 }
1337
1338
1339 // ------------------------------------------------------------------
1340 // CompileBroker::compilation_is_complete
1341 //
1342 // See if compilation of this method is already complete.
1343 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1344 int osr_bci,
1345 int comp_level) {
1346 bool is_osr = (osr_bci != standard_entry_bci);
1347 if (is_osr) {
1348 if (method->is_not_osr_compilable(comp_level)) {
1349 return true;
1350 } else {
1351 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1352 return (result != NULL);
1353 }
1354 } else {
1355 if (method->is_not_compilable(comp_level)) {
1356 return true;
1357 } else {
1358 CompiledMethod* result = method->code();
1359 if (result == NULL) return false;
1360 return comp_level == result->comp_level();
1361 }
1362 }
1363 }
1364
1365
1366 /**
1367 * See if this compilation is already requested.
1368 *
1369 * Implementation note: there is only a single "is in queue" bit
1370 * for each method. This means that the check below is overly
1371 * conservative in the sense that an osr compilation in the queue
1372 * will block a normal compilation from entering the queue (and vice
1373 * versa). This can be remedied by a full queue search to disambiguate
1374 * cases. If it is deemed profitable, this may be done.
1375 */
1376 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1377 return method->queued_for_compilation();
1378 }
1379
1380 // ------------------------------------------------------------------
1381 // CompileBroker::compilation_is_prohibited
1382 //
1383 // See if this compilation is not allowed.
1384 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1385 bool is_native = method->is_native();
1386 // Some compilers may not support the compilation of natives.
1387 AbstractCompiler *comp = compiler(comp_level);
1388 if (is_native &&
1389 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1390 method->set_not_compilable_quietly(comp_level);
1391 return true;
1392 }
1393
1394 bool is_osr = (osr_bci != standard_entry_bci);
1395 // Some compilers may not support on stack replacement.
1396 if (is_osr &&
1397 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1398 method->set_not_osr_compilable(comp_level);
1399 return true;
1400 }
1401
1402 // The method may be explicitly excluded by the user.
1403 double scale;
1404 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1405 bool quietly = CompilerOracle::should_exclude_quietly();
1406 if (PrintCompilation && !quietly) {
1407 // This does not happen quietly...
1408 ResourceMark rm;
1409 tty->print("### Excluding %s:%s",
1410 method->is_native() ? "generation of native wrapper" : "compile",
1411 (method->is_static() ? " static" : ""));
1412 method->print_short_name(tty);
1413 tty->cr();
1414 }
1415 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1416 }
1417
1418 return false;
1419 }
1420
1421 /**
1422 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1423 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1424 * The function also allows to generate separate compilation IDs for OSR compilations.
1425 */
1426 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1427 #ifdef ASSERT
1428 bool is_osr = (osr_bci != standard_entry_bci);
1429 int id;
1430 if (method->is_native()) {
1431 assert(!is_osr, "can't be osr");
1432 // Adapters, native wrappers and method handle intrinsics
1433 // should be generated always.
1434 return Atomic::add(1, &_compilation_id);
1435 } else if (CICountOSR && is_osr) {
1436 id = Atomic::add(1, &_osr_compilation_id);
1437 if (CIStartOSR <= id && id < CIStopOSR) {
1438 return id;
1439 }
1440 } else {
1441 id = Atomic::add(1, &_compilation_id);
1442 if (CIStart <= id && id < CIStop) {
1443 return id;
1444 }
1445 }
1446
1447 // Method was not in the appropriate compilation range.
1448 method->set_not_compilable_quietly();
1449 return 0;
1450 #else
1451 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1452 // only _compilation_id is incremented.
1453 return Atomic::add(1, &_compilation_id);
1454 #endif
1455 }
1456
1457 // ------------------------------------------------------------------
1458 // CompileBroker::assign_compile_id_unlocked
1459 //
1460 // Public wrapper for assign_compile_id that acquires the needed locks
1461 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1462 MutexLocker locker(MethodCompileQueue_lock, thread);
1463 return assign_compile_id(method, osr_bci);
1464 }
1465
1466 // ------------------------------------------------------------------
1467 // CompileBroker::preload_classes
1468 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1469 // Move this code over from c1_Compiler.cpp
1470 ShouldNotReachHere();
1471 }
1472
1473
1474 // ------------------------------------------------------------------
1475 // CompileBroker::create_compile_task
1476 //
1477 // Create a CompileTask object representing the current request for
1478 // compilation. Add this task to the queue.
1479 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1480 int compile_id,
1481 const methodHandle& method,
1482 int osr_bci,
1483 int comp_level,
1484 const methodHandle& hot_method,
1485 int hot_count,
1486 CompileTask::CompileReason compile_reason,
1487 bool blocking) {
1488 CompileTask* new_task = CompileTask::allocate();
1489 new_task->initialize(compile_id, method, osr_bci, comp_level,
1490 hot_method, hot_count, compile_reason,
1491 blocking);
1492 queue->add(new_task);
1493 return new_task;
1494 }
1495
1496 #if INCLUDE_JVMCI
1497 // The number of milliseconds to wait before checking if
1498 // JVMCI compilation has made progress.
1499 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1500
1501 // The number of JVMCI compilation progress checks that must fail
1502 // before unblocking a thread waiting for a blocking compilation.
1503 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1504
1505 /**
1506 * Waits for a JVMCI compiler to complete a given task. This thread
1507 * waits until either the task completes or it sees no JVMCI compilation
1508 * progress for N consecutive milliseconds where N is
1509 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1510 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1511 *
1512 * @return true if this thread needs to free/recycle the task
1513 */
1514 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1515 MutexLocker waiter(task->lock(), thread);
1516 int progress_wait_attempts = 0;
1517 int methods_compiled = jvmci->methods_compiled();
1518 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1519 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1520 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1521
1522 bool progress;
1523 if (jvmci_compiler_thread != NULL) {
1524 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1525 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1526 !jvmci_compiler_thread->is_external_suspend();
1527 } else {
1528 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1529 // that all JVMCI compiler threads are blocked on. We use the counter for
1530 // successful JVMCI compilations to determine whether JVMCI compilation
1531 // is still making progress through the JVMCI compiler queue.
1532 progress = jvmci->methods_compiled() != methods_compiled;
1533 }
1534
1535 if (!progress) {
1536 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1537 if (PrintCompilation) {
1538 task->print(tty, "wait for blocking compilation timed out");
1539 }
1540 break;
1541 }
1542 } else {
1543 progress_wait_attempts = 0;
1544 if (jvmci_compiler_thread == NULL) {
1545 methods_compiled = jvmci->methods_compiled();
1546 }
1547 }
1548 }
1549 task->clear_waiter();
1550 return task->is_complete();
1551 }
1552 #endif
1553
1554 /**
1555 * Wait for the compilation task to complete.
1556 */
1557 void CompileBroker::wait_for_completion(CompileTask* task) {
1558 if (CIPrintCompileQueue) {
1559 ttyLocker ttyl;
1560 tty->print_cr("BLOCKING FOR COMPILE");
1561 }
1562
1563 assert(task->is_blocking(), "can only wait on blocking task");
1564
1565 JavaThread* thread = JavaThread::current();
1566 thread->set_blocked_on_compilation(true);
1567
1568 methodHandle method(thread, task->method());
1569 bool free_task;
1570 #if INCLUDE_JVMCI
1571 AbstractCompiler* comp = compiler(task->comp_level());
1572 if (comp->is_jvmci()) {
1573 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1574 } else
1575 #endif
1576 {
1577 MutexLocker waiter(task->lock(), thread);
1578 free_task = true;
1579 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1580 task->lock()->wait();
1581 }
1582 }
1583
1584 thread->set_blocked_on_compilation(false);
1585 if (free_task) {
1586 if (is_compilation_disabled_forever()) {
1587 CompileTask::free(task);
1588 return;
1589 }
1590
1591 // It is harmless to check this status without the lock, because
1592 // completion is a stable property (until the task object is recycled).
1593 assert(task->is_complete(), "Compilation should have completed");
1594 assert(task->code_handle() == NULL, "must be reset");
1595
1596 // By convention, the waiter is responsible for recycling a
1597 // blocking CompileTask. Since there is only one waiter ever
1598 // waiting on a CompileTask, we know that no one else will
1599 // be using this CompileTask; we can free it.
1600 CompileTask::free(task);
1601 }
1602 }
1603
1604 /**
1605 * Initialize compiler thread(s) + compiler object(s). The postcondition
1606 * of this function is that the compiler runtimes are initialized and that
1607 * compiler threads can start compiling.
1608 */
1609 bool CompileBroker::init_compiler_runtime() {
1610 CompilerThread* thread = CompilerThread::current();
1611 AbstractCompiler* comp = thread->compiler();
1612 // Final sanity check - the compiler object must exist
1613 guarantee(comp != NULL, "Compiler object must exist");
1614
1615 int system_dictionary_modification_counter;
1616 {
1617 MutexLocker locker(Compile_lock, thread);
1618 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1619 }
1620
1621 {
1622 // Must switch to native to allocate ci_env
1623 ThreadToNativeFromVM ttn(thread);
1624 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1625 // Cache Jvmti state
1626 ci_env.cache_jvmti_state();
1627 // Cache DTrace flags
1628 ci_env.cache_dtrace_flags();
1629
1630 // Switch back to VM state to do compiler initialization
1631 ThreadInVMfromNative tv(thread);
1632 ResetNoHandleMark rnhm;
1633
1634 // Perform per-thread and global initializations
1635 comp->initialize();
1636 }
1637
1638 if (comp->is_failed()) {
1639 disable_compilation_forever();
1640 // If compiler initialization failed, no compiler thread that is specific to a
1641 // particular compiler runtime will ever start to compile methods.
1642 shutdown_compiler_runtime(comp, thread);
1643 return false;
1644 }
1645
1646 // C1 specific check
1647 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1648 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1649 return false;
1650 }
1651
1652 return true;
1653 }
1654
1655 /**
1656 * If C1 and/or C2 initialization failed, we shut down all compilation.
1657 * We do this to keep things simple. This can be changed if it ever turns
1658 * out to be a problem.
1659 */
1660 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1661 // Free buffer blob, if allocated
1662 if (thread->get_buffer_blob() != NULL) {
1663 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1664 CodeCache::free(thread->get_buffer_blob());
1665 }
1666
1667 if (comp->should_perform_shutdown()) {
1668 // There are two reasons for shutting down the compiler
1669 // 1) compiler runtime initialization failed
1670 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1671 warning("%s initialization failed. Shutting down all compilers", comp->name());
1672
1673 // Only one thread per compiler runtime object enters here
1674 // Set state to shut down
1675 comp->set_shut_down();
1676
1677 // Delete all queued compilation tasks to make compiler threads exit faster.
1678 if (_c1_compile_queue != NULL) {
1679 _c1_compile_queue->free_all();
1680 }
1681
1682 if (_c2_compile_queue != NULL) {
1683 _c2_compile_queue->free_all();
1684 }
1685
1686 // Set flags so that we continue execution with using interpreter only.
1687 UseCompiler = false;
1688 UseInterpreter = true;
1689
1690 // We could delete compiler runtimes also. However, there are references to
1691 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1692 // fail. This can be done later if necessary.
1693 }
1694 }
1695
1696 /**
1697 * Helper function to create new or reuse old CompileLog.
1698 */
1699 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1700 if (!LogCompilation) return NULL;
1701
1702 AbstractCompiler *compiler = ct->compiler();
1703 bool c1 = compiler->is_c1();
1704 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1705 assert(compiler_objects != NULL, "must be initialized at this point");
1706 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1707 assert(logs != NULL, "must be initialized at this point");
1708 int count = c1 ? _c1_count : _c2_count;
1709
1710 // Find Compiler number by its threadObj.
1711 oop compiler_obj = ct->threadObj();
1712 int compiler_number = 0;
1713 bool found = false;
1714 for (; compiler_number < count; compiler_number++) {
1715 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1716 found = true;
1717 break;
1718 }
1719 }
1720 assert(found, "Compiler must exist at this point");
1721
1722 // Determine pointer for this thread's log.
1723 CompileLog** log_ptr = &logs[compiler_number];
1724
1725 // Return old one if it exists.
1726 CompileLog* log = *log_ptr;
1727 if (log != NULL) {
1728 ct->init_log(log);
1729 return log;
1730 }
1731
1732 // Create a new one and remember it.
1733 init_compiler_thread_log();
1734 log = ct->log();
1735 *log_ptr = log;
1736 return log;
1737 }
1738
1739 // ------------------------------------------------------------------
1740 // CompileBroker::compiler_thread_loop
1741 //
1742 // The main loop run by a CompilerThread.
1743 void CompileBroker::compiler_thread_loop() {
1744 CompilerThread* thread = CompilerThread::current();
1745 CompileQueue* queue = thread->queue();
1746 // For the thread that initializes the ciObjectFactory
1747 // this resource mark holds all the shared objects
1748 ResourceMark rm;
1749
1750 // First thread to get here will initialize the compiler interface
1751
1752 {
1753 ASSERT_IN_VM;
1754 MutexLocker only_one (CompileThread_lock, thread);
1755 if (!ciObjectFactory::is_initialized()) {
1756 ciObjectFactory::initialize();
1757 }
1758 }
1759
1760 // Open a log.
1761 CompileLog* log = get_log(thread);
1762 if (log != NULL) {
1763 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1764 thread->name(),
1765 os::current_thread_id(),
1766 os::current_process_id());
1767 log->stamp();
1768 log->end_elem();
1769 }
1770
1771 // If compiler thread/runtime initialization fails, exit the compiler thread
1772 if (!init_compiler_runtime()) {
1773 return;
1774 }
1775
1776 thread->start_idle_timer();
1777
1778 // Poll for new compilation tasks as long as the JVM runs. Compilation
1779 // should only be disabled if something went wrong while initializing the
1780 // compiler runtimes. This, in turn, should not happen. The only known case
1781 // when compiler runtime initialization fails is if there is not enough free
1782 // space in the code cache to generate the necessary stubs, etc.
1783 while (!is_compilation_disabled_forever()) {
1784 // We need this HandleMark to avoid leaking VM handles.
1785 HandleMark hm(thread);
1786
1787 CompileTask* task = queue->get();
1788 if (task == NULL) {
1789 if (UseDynamicNumberOfCompilerThreads) {
1790 // Access compiler_count under lock to enforce consistency.
1791 MutexLocker only_one(CompileThread_lock);
1792 if (can_remove(thread, true)) {
1793 if (TraceCompilerThreads) {
1794 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1795 thread->name(), thread->idle_time_millis());
1796 }
1797 // Free buffer blob, if allocated
1798 if (thread->get_buffer_blob() != NULL) {
1799 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1800 CodeCache::free(thread->get_buffer_blob());
1801 }
1802 return; // Stop this thread.
1803 }
1804 }
1805 } else {
1806 // Assign the task to the current thread. Mark this compilation
1807 // thread as active for the profiler.
1808 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1809 // occurs after fetching the compile task off the queue.
1810 CompileTaskWrapper ctw(task);
1811 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1812 task->set_code_handle(&result_handle);
1813 methodHandle method(thread, task->method());
1814
1815 // Never compile a method if breakpoints are present in it
1816 if (method()->number_of_breakpoints() == 0) {
1817 // Compile the method.
1818 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1819 invoke_compiler_on_method(task);
1820 thread->start_idle_timer();
1821 } else {
1822 // After compilation is disabled, remove remaining methods from queue
1823 method->clear_queued_for_compilation();
1824 task->set_failure_reason("compilation is disabled");
1825 }
1826 }
1827
1828 if (UseDynamicNumberOfCompilerThreads) {
1829 possibly_add_compiler_threads();
1830 }
1831 }
1832 }
1833
1834 // Shut down compiler runtime
1835 shutdown_compiler_runtime(thread->compiler(), thread);
1836 }
1837
1838 // ------------------------------------------------------------------
1839 // CompileBroker::init_compiler_thread_log
1840 //
1841 // Set up state required by +LogCompilation.
1842 void CompileBroker::init_compiler_thread_log() {
1843 CompilerThread* thread = CompilerThread::current();
1844 char file_name[4*K];
1845 FILE* fp = NULL;
1846 intx thread_id = os::current_thread_id();
1847 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1848 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1849 if (dir == NULL) {
1850 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1851 thread_id, os::current_process_id());
1852 } else {
1853 jio_snprintf(file_name, sizeof(file_name),
1854 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1855 os::file_separator(), thread_id, os::current_process_id());
1856 }
1857
1858 fp = fopen(file_name, "wt");
1859 if (fp != NULL) {
1860 if (LogCompilation && Verbose) {
1861 tty->print_cr("Opening compilation log %s", file_name);
1862 }
1863 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1864 if (log == NULL) {
1865 fclose(fp);
1866 return;
1867 }
1868 thread->init_log(log);
1869
1870 if (xtty != NULL) {
1871 ttyLocker ttyl;
1872 // Record any per thread log files
1873 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1874 }
1875 return;
1876 }
1877 }
1878 warning("Cannot open log file: %s", file_name);
1879 }
1880
1881 void CompileBroker::log_metaspace_failure() {
1882 const char* message = "some methods may not be compiled because metaspace "
1883 "is out of memory";
1884 if (_compilation_log != NULL) {
1885 _compilation_log->log_metaspace_failure(message);
1886 }
1887 if (PrintCompilation) {
1888 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1889 }
1890 }
1891
1892
1893 // ------------------------------------------------------------------
1894 // CompileBroker::set_should_block
1895 //
1896 // Set _should_block.
1897 // Call this from the VM, with Threads_lock held and a safepoint requested.
1898 void CompileBroker::set_should_block() {
1899 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1900 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1901 #ifndef PRODUCT
1902 if (PrintCompilation && (Verbose || WizardMode))
1903 tty->print_cr("notifying compiler thread pool to block");
1904 #endif
1905 _should_block = true;
1906 }
1907
1908 // ------------------------------------------------------------------
1909 // CompileBroker::maybe_block
1910 //
1911 // Call this from the compiler at convenient points, to poll for _should_block.
1912 void CompileBroker::maybe_block() {
1913 if (_should_block) {
1914 #ifndef PRODUCT
1915 if (PrintCompilation && (Verbose || WizardMode))
1916 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1917 #endif
1918 ThreadInVMfromNative tivfn(JavaThread::current());
1919 }
1920 }
1921
1922 // wrapper for CodeCache::print_summary()
1923 static void codecache_print(bool detailed)
1924 {
1925 ResourceMark rm;
1926 stringStream s;
1927 // Dump code cache into a buffer before locking the tty,
1928 {
1929 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1930 CodeCache::print_summary(&s, detailed);
1931 }
1932 ttyLocker ttyl;
1933 tty->print("%s", s.as_string());
1934 }
1935
1936 // wrapper for CodeCache::print_summary() using outputStream
1937 static void codecache_print(outputStream* out, bool detailed) {
1938 ResourceMark rm;
1939 stringStream s;
1940
1941 // Dump code cache into a buffer
1942 {
1943 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1944 CodeCache::print_summary(&s, detailed);
1945 }
1946
1947 char* remaining_log = s.as_string();
1948 while (*remaining_log != '\0') {
1949 char* eol = strchr(remaining_log, '\n');
1950 if (eol == NULL) {
1951 out->print_cr("%s", remaining_log);
1952 remaining_log = remaining_log + strlen(remaining_log);
1953 } else {
1954 *eol = '\0';
1955 out->print_cr("%s", remaining_log);
1956 remaining_log = eol + 1;
1957 }
1958 }
1959 }
1960
1961 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1962 int compilable, const char* failure_reason) {
1963 if (success) {
1964 task->mark_success();
1965 if (ci_env != NULL) {
1966 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1967 }
1968 if (_compilation_log != NULL) {
1969 nmethod* code = task->code();
1970 if (code != NULL) {
1971 _compilation_log->log_nmethod(thread, code);
1972 }
1973 }
1974 } else if (AbortVMOnCompilationFailure) {
1975 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1976 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
1977 }
1978 if (compilable == ciEnv::MethodCompilable_never) {
1979 fatal("Never compilable: %s", failure_reason);
1980 }
1981 }
1982 // simulate crash during compilation
1983 assert(task->compile_id() != CICrashAt, "just as planned");
1984 }
1985
1986 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1987 assert(event != NULL, "invariant");
1988 assert(event->should_commit(), "invariant");
1989 event->set_method(task->method());
1990 event->set_compileId(task->compile_id());
1991 event->set_compileLevel(task->comp_level());
1992 event->set_succeded(task->is_success());
1993 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1994 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1995 event->set_inlinedBytes(task->num_inlined_bytecodes());
1996 event->commit();
1997 }
1998
1999 int DirectivesStack::_depth = 0;
2000 CompilerDirectives* DirectivesStack::_top = NULL;
2001 CompilerDirectives* DirectivesStack::_bottom = NULL;
2002
2003 // ------------------------------------------------------------------
2004 // CompileBroker::invoke_compiler_on_method
2005 //
2006 // Compile a method.
2007 //
2008 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2009 task->print_ul();
2010 if (PrintCompilation) {
2011 ResourceMark rm;
2012 task->print_tty();
2013 }
2014 elapsedTimer time;
2015
2016 CompilerThread* thread = CompilerThread::current();
2017 ResourceMark rm(thread);
2018
2019 if (LogEvents) {
2020 _compilation_log->log_compile(thread, task);
2021 }
2022
2023 // Common flags.
2024 uint compile_id = task->compile_id();
2025 int osr_bci = task->osr_bci();
2026 bool is_osr = (osr_bci != standard_entry_bci);
2027 bool should_log = (thread->log() != NULL);
2028 bool should_break = false;
2029 const int task_level = task->comp_level();
2030 AbstractCompiler* comp = task->compiler();
2031
2032 DirectiveSet* directive;
2033 {
2034 // create the handle inside it's own block so it can't
2035 // accidentally be referenced once the thread transitions to
2036 // native. The NoHandleMark before the transition should catch
2037 // any cases where this occurs in the future.
2038 methodHandle method(thread, task->method());
2039 assert(!method->is_native(), "no longer compile natives");
2040
2041 // Look up matching directives
2042 directive = DirectivesStack::getMatchingDirective(method, comp);
2043
2044 // Save information about this method in case of failure.
2045 set_last_compile(thread, method, is_osr, task_level);
2046
2047 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2048 }
2049
2050 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2051 if (should_log && !directive->LogOption) {
2052 should_log = false;
2053 }
2054
2055 // Allocate a new set of JNI handles.
2056 push_jni_handle_block();
2057 Method* target_handle = task->method();
2058 int compilable = ciEnv::MethodCompilable;
2059 const char* failure_reason = NULL;
2060 const char* retry_message = NULL;
2061
2062 int system_dictionary_modification_counter;
2063 {
2064 MutexLocker locker(Compile_lock, thread);
2065 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2066 }
2067
2068 #if INCLUDE_JVMCI
2069 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2070 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2071
2072 TraceTime t1("compilation", &time);
2073 EventCompilation event;
2074
2075 // Skip redefined methods
2076 if (target_handle->is_old()) {
2077 failure_reason = "redefined method";
2078 retry_message = "not retryable";
2079 compilable = ciEnv::MethodCompilable_never;
2080 } else {
2081 JVMCIEnv env(task, system_dictionary_modification_counter);
2082 methodHandle method(thread, target_handle);
2083 jvmci->compile_method(method, osr_bci, &env);
2084
2085 failure_reason = env.failure_reason();
2086 if (!env.retryable()) {
2087 retry_message = "not retryable";
2088 compilable = ciEnv::MethodCompilable_not_at_tier;
2089 }
2090 }
2091 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2092 if (event.should_commit()) {
2093 post_compilation_event(&event, task);
2094 }
2095
2096 } else
2097 #endif // INCLUDE_JVMCI
2098 {
2099 NoHandleMark nhm;
2100 ThreadToNativeFromVM ttn(thread);
2101
2102 ciEnv ci_env(task, system_dictionary_modification_counter);
2103 if (should_break) {
2104 ci_env.set_break_at_compile(true);
2105 }
2106 if (should_log) {
2107 ci_env.set_log(thread->log());
2108 }
2109 assert(thread->env() == &ci_env, "set by ci_env");
2110 // The thread-env() field is cleared in ~CompileTaskWrapper.
2111
2112 // Cache Jvmti state
2113 ci_env.cache_jvmti_state();
2114
2115 // Cache DTrace flags
2116 ci_env.cache_dtrace_flags();
2117
2118 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2119
2120 TraceTime t1("compilation", &time);
2121 EventCompilation event;
2122
2123 if (comp == NULL) {
2124 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2125 } else {
2126 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2127 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2128 while (WhiteBox::compilation_locked) {
2129 locker.wait(Mutex::_no_safepoint_check_flag);
2130 }
2131 }
2132 comp->compile_method(&ci_env, target, osr_bci, directive);
2133 }
2134
2135 if (!ci_env.failing() && task->code() == NULL) {
2136 //assert(false, "compiler should always document failure");
2137 // The compiler elected, without comment, not to register a result.
2138 // Do not attempt further compilations of this method.
2139 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2140 }
2141
2142 // Copy this bit to the enclosing block:
2143 compilable = ci_env.compilable();
2144
2145 if (ci_env.failing()) {
2146 failure_reason = ci_env.failure_reason();
2147 retry_message = ci_env.retry_message();
2148 ci_env.report_failure(failure_reason);
2149 }
2150
2151 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2152 if (event.should_commit()) {
2153 post_compilation_event(&event, task);
2154 }
2155 }
2156 // Remove the JNI handle block after the ciEnv destructor has run in
2157 // the previous block.
2158 pop_jni_handle_block();
2159
2160 if (failure_reason != NULL) {
2161 task->set_failure_reason(failure_reason);
2162 if (_compilation_log != NULL) {
2163 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2164 }
2165 if (PrintCompilation) {
2166 FormatBufferResource msg = retry_message != NULL ?
2167 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2168 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2169 task->print(tty, msg);
2170 }
2171 }
2172
2173 methodHandle method(thread, task->method());
2174
2175 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2176
2177 collect_statistics(thread, time, task);
2178
2179 nmethod* nm = task->code();
2180 if (nm != NULL) {
2181 nm->maybe_print_nmethod(directive);
2182 }
2183 DirectivesStack::release(directive);
2184
2185 if (PrintCompilation && PrintCompilation2) {
2186 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2187 tty->print("%4d ", compile_id); // print compilation number
2188 tty->print("%s ", (is_osr ? "%" : " "));
2189 if (task->code() != NULL) {
2190 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2191 }
2192 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2193 }
2194
2195 Log(compilation, codecache) log;
2196 if (log.is_debug()) {
2197 LogStream ls(log.debug());
2198 codecache_print(&ls, /* detailed= */ false);
2199 }
2200 if (PrintCodeCacheOnCompilation) {
2201 codecache_print(/* detailed= */ false);
2202 }
2203 // Disable compilation, if required.
2204 switch (compilable) {
2205 case ciEnv::MethodCompilable_never:
2206 if (is_osr)
2207 method->set_not_osr_compilable_quietly();
2208 else
2209 method->set_not_compilable_quietly();
2210 break;
2211 case ciEnv::MethodCompilable_not_at_tier:
2212 if (is_osr)
2213 method->set_not_osr_compilable_quietly(task_level);
2214 else
2215 method->set_not_compilable_quietly(task_level);
2216 break;
2217 }
2218
2219 // Note that the queued_for_compilation bits are cleared without
2220 // protection of a mutex. [They were set by the requester thread,
2221 // when adding the task to the compile queue -- at which time the
2222 // compile queue lock was held. Subsequently, we acquired the compile
2223 // queue lock to get this task off the compile queue; thus (to belabour
2224 // the point somewhat) our clearing of the bits must be occurring
2225 // only after the setting of the bits. See also 14012000 above.
2226 method->clear_queued_for_compilation();
2227
2228 #ifdef ASSERT
2229 if (CollectedHeap::fired_fake_oom()) {
2230 // The current compile received a fake OOM during compilation so
2231 // go ahead and exit the VM since the test apparently succeeded
2232 tty->print_cr("*** Shutting down VM after successful fake OOM");
2233 vm_exit(0);
2234 }
2235 #endif
2236 }
2237
2238 /**
2239 * The CodeCache is full. Print warning and disable compilation.
2240 * Schedule code cache cleaning so compilation can continue later.
2241 * This function needs to be called only from CodeCache::allocate(),
2242 * since we currently handle a full code cache uniformly.
2243 */
2244 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2245 UseInterpreter = true;
2246 if (UseCompiler || AlwaysCompileLoopMethods ) {
2247 if (xtty != NULL) {
2248 ResourceMark rm;
2249 stringStream s;
2250 // Dump code cache state into a buffer before locking the tty,
2251 // because log_state() will use locks causing lock conflicts.
2252 CodeCache::log_state(&s);
2253 // Lock to prevent tearing
2254 ttyLocker ttyl;
2255 xtty->begin_elem("code_cache_full");
2256 xtty->print("%s", s.as_string());
2257 xtty->stamp();
2258 xtty->end_elem();
2259 }
2260
2261 #ifndef PRODUCT
2262 if (CompileTheWorld || ExitOnFullCodeCache) {
2263 codecache_print(/* detailed= */ true);
2264 before_exit(JavaThread::current());
2265 exit_globals(); // will delete tty
2266 vm_direct_exit(CompileTheWorld ? 0 : 1);
2267 }
2268 #endif
2269 if (UseCodeCacheFlushing) {
2270 // Since code cache is full, immediately stop new compiles
2271 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2272 NMethodSweeper::log_sweep("disable_compiler");
2273 }
2274 } else {
2275 disable_compilation_forever();
2276 }
2277
2278 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2279 }
2280 }
2281
2282 // ------------------------------------------------------------------
2283 // CompileBroker::set_last_compile
2284 //
2285 // Record this compilation for debugging purposes.
2286 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2287 ResourceMark rm;
2288 char* method_name = method->name()->as_C_string();
2289 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2290 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2291 char current_method[CompilerCounters::cmname_buffer_length];
2292 size_t maxLen = CompilerCounters::cmname_buffer_length;
2293
2294 if (UsePerfData) {
2295 const char* class_name = method->method_holder()->name()->as_C_string();
2296
2297 size_t s1len = strlen(class_name);
2298 size_t s2len = strlen(method_name);
2299
2300 // check if we need to truncate the string
2301 if (s1len + s2len + 2 > maxLen) {
2302
2303 // the strategy is to lop off the leading characters of the
2304 // class name and the trailing characters of the method name.
2305
2306 if (s2len + 2 > maxLen) {
2307 // lop of the entire class name string, let snprintf handle
2308 // truncation of the method name.
2309 class_name += s1len; // null string
2310 }
2311 else {
2312 // lop off the extra characters from the front of the class name
2313 class_name += ((s1len + s2len + 2) - maxLen);
2314 }
2315 }
2316
2317 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2318 }
2319
2320 if (CICountOSR && is_osr) {
2321 _last_compile_type = osr_compile;
2322 } else {
2323 _last_compile_type = normal_compile;
2324 }
2325 _last_compile_level = comp_level;
2326
2327 if (UsePerfData) {
2328 CompilerCounters* counters = thread->counters();
2329 counters->set_current_method(current_method);
2330 counters->set_compile_type((jlong)_last_compile_type);
2331 }
2332 }
2333
2334
2335 // ------------------------------------------------------------------
2336 // CompileBroker::push_jni_handle_block
2337 //
2338 // Push on a new block of JNI handles.
2339 void CompileBroker::push_jni_handle_block() {
2340 JavaThread* thread = JavaThread::current();
2341
2342 // Allocate a new block for JNI handles.
2343 // Inlined code from jni_PushLocalFrame()
2344 JNIHandleBlock* java_handles = thread->active_handles();
2345 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2346 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2347 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2348 thread->set_active_handles(compile_handles);
2349 }
2350
2351
2352 // ------------------------------------------------------------------
2353 // CompileBroker::pop_jni_handle_block
2354 //
2355 // Pop off the current block of JNI handles.
2356 void CompileBroker::pop_jni_handle_block() {
2357 JavaThread* thread = JavaThread::current();
2358
2359 // Release our JNI handle block
2360 JNIHandleBlock* compile_handles = thread->active_handles();
2361 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2362 thread->set_active_handles(java_handles);
2363 compile_handles->set_pop_frame_link(NULL);
2364 JNIHandleBlock::release_block(compile_handles, thread); // may block
2365 }
2366
2367 // ------------------------------------------------------------------
2368 // CompileBroker::collect_statistics
2369 //
2370 // Collect statistics about the compilation.
2371
2372 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2373 bool success = task->is_success();
2374 methodHandle method (thread, task->method());
2375 uint compile_id = task->compile_id();
2376 bool is_osr = (task->osr_bci() != standard_entry_bci);
2377 nmethod* code = task->code();
2378 CompilerCounters* counters = thread->counters();
2379
2380 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2381 MutexLocker locker(CompileStatistics_lock);
2382
2383 // _perf variables are production performance counters which are
2384 // updated regardless of the setting of the CITime and CITimeEach flags
2385 //
2386
2387 // account all time, including bailouts and failures in this counter;
2388 // C1 and C2 counters are counting both successful and unsuccessful compiles
2389 _t_total_compilation.add(time);
2390
2391 if (!success) {
2392 _total_bailout_count++;
2393 if (UsePerfData) {
2394 _perf_last_failed_method->set_value(counters->current_method());
2395 _perf_last_failed_type->set_value(counters->compile_type());
2396 _perf_total_bailout_count->inc();
2397 }
2398 _t_bailedout_compilation.add(time);
2399 } else if (code == NULL) {
2400 if (UsePerfData) {
2401 _perf_last_invalidated_method->set_value(counters->current_method());
2402 _perf_last_invalidated_type->set_value(counters->compile_type());
2403 _perf_total_invalidated_count->inc();
2404 }
2405 _total_invalidated_count++;
2406 _t_invalidated_compilation.add(time);
2407 } else {
2408 // Compilation succeeded
2409
2410 // update compilation ticks - used by the implementation of
2411 // java.lang.management.CompilationMBean
2412 _perf_total_compilation->inc(time.ticks());
2413 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2414
2415 if (CITime) {
2416 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2417 if (is_osr) {
2418 _t_osr_compilation.add(time);
2419 _sum_osr_bytes_compiled += bytes_compiled;
2420 } else {
2421 _t_standard_compilation.add(time);
2422 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2423 }
2424
2425 #if INCLUDE_JVMCI
2426 AbstractCompiler* comp = compiler(task->comp_level());
2427 if (comp) {
2428 CompilerStatistics* stats = comp->stats();
2429 if (stats) {
2430 if (is_osr) {
2431 stats->_osr.update(time, bytes_compiled);
2432 } else {
2433 stats->_standard.update(time, bytes_compiled);
2434 }
2435 stats->_nmethods_size += code->total_size();
2436 stats->_nmethods_code_size += code->insts_size();
2437 } else { // if (!stats)
2438 assert(false, "Compiler statistics object must exist");
2439 }
2440 } else { // if (!comp)
2441 assert(false, "Compiler object must exist");
2442 }
2443 #endif // INCLUDE_JVMCI
2444 }
2445
2446 if (UsePerfData) {
2447 // save the name of the last method compiled
2448 _perf_last_method->set_value(counters->current_method());
2449 _perf_last_compile_type->set_value(counters->compile_type());
2450 _perf_last_compile_size->set_value(method->code_size() +
2451 task->num_inlined_bytecodes());
2452 if (is_osr) {
2453 _perf_osr_compilation->inc(time.ticks());
2454 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2455 } else {
2456 _perf_standard_compilation->inc(time.ticks());
2457 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2458 }
2459 }
2460
2461 if (CITimeEach) {
2462 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2463 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2464 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2465 }
2466
2467 // Collect counts of successful compilations
2468 _sum_nmethod_size += code->total_size();
2469 _sum_nmethod_code_size += code->insts_size();
2470 _total_compile_count++;
2471
2472 if (UsePerfData) {
2473 _perf_sum_nmethod_size->inc( code->total_size());
2474 _perf_sum_nmethod_code_size->inc(code->insts_size());
2475 _perf_total_compile_count->inc();
2476 }
2477
2478 if (is_osr) {
2479 if (UsePerfData) _perf_total_osr_compile_count->inc();
2480 _total_osr_compile_count++;
2481 } else {
2482 if (UsePerfData) _perf_total_standard_compile_count->inc();
2483 _total_standard_compile_count++;
2484 }
2485 }
2486 // set the current method for the thread to null
2487 if (UsePerfData) counters->set_current_method("");
2488 }
2489
2490 const char* CompileBroker::compiler_name(int comp_level) {
2491 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2492 if (comp == NULL) {
2493 return "no compiler";
2494 } else {
2495 return (comp->name());
2496 }
2497 }
2498
2499 #if INCLUDE_JVMCI
2500 void CompileBroker::print_times(AbstractCompiler* comp) {
2501 CompilerStatistics* stats = comp->stats();
2502 if (stats) {
2503 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}",
2504 comp->name(), stats->bytes_per_second(),
2505 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2506 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2507 stats->_nmethods_size, stats->_nmethods_code_size);
2508 } else { // if (!stats)
2509 assert(false, "Compiler statistics object must exist");
2510 }
2511 comp->print_timers();
2512 }
2513 #endif // INCLUDE_JVMCI
2514
2515 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2516 #if INCLUDE_JVMCI
2517 elapsedTimer standard_compilation;
2518 elapsedTimer total_compilation;
2519 elapsedTimer osr_compilation;
2520
2521 int standard_bytes_compiled = 0;
2522 int osr_bytes_compiled = 0;
2523
2524 int standard_compile_count = 0;
2525 int osr_compile_count = 0;
2526 int total_compile_count = 0;
2527
2528 int nmethods_size = 0;
2529 int nmethods_code_size = 0;
2530 bool printedHeader = false;
2531
2532 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2533 AbstractCompiler* comp = _compilers[i];
2534 if (comp != NULL) {
2535 if (per_compiler && aggregate && !printedHeader) {
2536 printedHeader = true;
2537 tty->cr();
2538 tty->print_cr("Individual compiler times (for compiled methods only)");
2539 tty->print_cr("------------------------------------------------");
2540 tty->cr();
2541 }
2542 CompilerStatistics* stats = comp->stats();
2543
2544 if (stats) {
2545 standard_compilation.add(stats->_standard._time);
2546 osr_compilation.add(stats->_osr._time);
2547
2548 standard_bytes_compiled += stats->_standard._bytes;
2549 osr_bytes_compiled += stats->_osr._bytes;
2550
2551 standard_compile_count += stats->_standard._count;
2552 osr_compile_count += stats->_osr._count;
2553
2554 nmethods_size += stats->_nmethods_size;
2555 nmethods_code_size += stats->_nmethods_code_size;
2556 } else { // if (!stats)
2557 assert(false, "Compiler statistics object must exist");
2558 }
2559
2560 if (per_compiler) {
2561 print_times(comp);
2562 }
2563 }
2564 }
2565 total_compile_count = osr_compile_count + standard_compile_count;
2566 total_compilation.add(osr_compilation);
2567 total_compilation.add(standard_compilation);
2568
2569 // In hosted mode, print the JVMCI compiler specific counters manually.
2570 if (!UseJVMCICompiler) {
2571 JVMCICompiler::print_compilation_timers();
2572 }
2573 #else // INCLUDE_JVMCI
2574 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2575 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2576 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2577
2578 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2579 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2580
2581 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2582 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2583 int total_compile_count = CompileBroker::_total_compile_count;
2584
2585 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2586 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2587 #endif // INCLUDE_JVMCI
2588
2589 if (!aggregate) {
2590 return;
2591 }
2592 tty->cr();
2593 tty->print_cr("Accumulated compiler times");
2594 tty->print_cr("----------------------------------------------------------");
2595 //0000000000111111111122222222223333333333444444444455555555556666666666
2596 //0123456789012345678901234567890123456789012345678901234567890123456789
2597 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2598 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2599 standard_compilation.seconds(),
2600 standard_compilation.seconds() / standard_compile_count);
2601 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2602 CompileBroker::_t_bailedout_compilation.seconds(),
2603 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2604 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2605 osr_compilation.seconds(),
2606 osr_compilation.seconds() / osr_compile_count);
2607 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2608 CompileBroker::_t_invalidated_compilation.seconds(),
2609 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2610
2611 AbstractCompiler *comp = compiler(CompLevel_simple);
2612 if (comp != NULL) {
2613 tty->cr();
2614 comp->print_timers();
2615 }
2616 comp = compiler(CompLevel_full_optimization);
2617 if (comp != NULL) {
2618 tty->cr();
2619 comp->print_timers();
2620 }
2621 tty->cr();
2622 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2623 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2624 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2625 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2626 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2627 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2628 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2629 double tcs = total_compilation.seconds();
2630 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2631 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2632 tty->cr();
2633 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2634 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2635 }
2636
2637 // Debugging output for failure
2638 void CompileBroker::print_last_compile() {
2639 if (_last_compile_level != CompLevel_none &&
2640 compiler(_last_compile_level) != NULL &&
2641 _last_compile_type != no_compile) {
2642 if (_last_compile_type == osr_compile) {
2643 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2644 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2645 } else {
2646 tty->print_cr("Last parse: %d+++(%d) %s",
2647 _compilation_id, _last_compile_level, _last_method_compiled);
2648 }
2649 }
2650 }
2651
2652 // Print general/accumulated JIT information.
2653 void CompileBroker::print_info(outputStream *out) {
2654 if (out == NULL) out = tty;
2655 out->cr();
2656 out->print_cr("======================");
2657 out->print_cr(" General JIT info ");
2658 out->print_cr("======================");
2659 out->cr();
2660 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2661 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2662 out->cr();
2663 out->print_cr("CodeCache overview");
2664 out->print_cr("--------------------------------------------------------");
2665 out->cr();
2666 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2667 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2668 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2669 out->cr();
2670
2671 out->cr();
2672 out->print_cr("CodeCache cleaning overview");
2673 out->print_cr("--------------------------------------------------------");
2674 out->cr();
2675 NMethodSweeper::print(out);
2676 out->print_cr("--------------------------------------------------------");
2677 out->cr();
2678 }
2679
2680 // Note: tty_lock must not be held upon entry to this function.
2681 // Print functions called from herein do "micro-locking" on tty_lock.
2682 // That's a tradeoff which keeps together important blocks of output.
2683 // At the same time, continuous tty_lock hold time is kept in check,
2684 // preventing concurrently printing threads from stalling a long time.
2685 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2686 TimeStamp ts_total;
2687 TimeStamp ts;
2688
2689 bool allFun = !strcmp(function, "all");
2690 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2691 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2692 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2693 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2694 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2695 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2696 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2697 bool discard = !strcmp(function, "discard") || allFun;
2698
2699 if (out == NULL) {
2700 out = tty;
2701 }
2702
2703 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2704 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2705 out->cr();
2706 return;
2707 }
2708
2709 ts_total.update(); // record starting point
2710
2711 if (aggregate) {
2712 print_info(out);
2713 }
2714
2715 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2716 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function.
2717 // When we request individual parts of the analysis via the jcmd interface, it is possible
2718 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2719 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2720 // across user interaction.
2721 ts.update(); // record starting point
2722 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2723 out->cr();
2724 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds());
2725 out->cr();
2726
2727 if (aggregate) {
2728 // It is sufficient to hold the CodeCache_lock only for the aggregate step.
2729 // All other functions operate on aggregated data - except MethodNames, but that should be safe.
2730 // The separate CodeHeapStateAnalytics_lock protects the printing functions against
2731 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock.
2732 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2733 // leading to an unnecessarily long hold time of the CodeCache_lock.
2734 ts.update(); // record starting point
2735 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2736 out->cr();
2737 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds());
2738 out->cr();
2739
2740 ts.update(); // record starting point
2741 CodeCache::aggregate(out, granularity);
2742 out->cr();
2743 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds());
2744 out->cr();
2745 }
2746
2747 if (usedSpace) CodeCache::print_usedSpace(out);
2748 if (freeSpace) CodeCache::print_freeSpace(out);
2749 if (methodCount) CodeCache::print_count(out);
2750 if (methodSpace) CodeCache::print_space(out);
2751 if (methodAge) CodeCache::print_age(out);
2752 if (methodNames) CodeCache::print_names(out);
2753 if (discard) CodeCache::discard(out);
2754
2755 out->cr();
2756 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds());
2757 out->cr();
2758 }