1 /*
2 * Copyright (c) 1999, 2019, 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 "memory/universe.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/method.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "prims/whitebox.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/atomic.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.inline.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.inline.hpp"
57 #include "runtime/os.hpp"
58 #include "runtime/safepointVerifiers.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/sweeper.hpp"
61 #include "runtime/timerTrace.hpp"
62 #include "runtime/vframe.inline.hpp"
63 #include "utilities/debug.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/formatBuffer.hpp"
67 #include "utilities/macros.hpp"
68 #ifdef COMPILER1
69 #include "c1/c1_Compiler.hpp"
70 #endif
71 #if INCLUDE_JVMCI
72 #include "jvmci/jvmciEnv.hpp"
73 #include "jvmci/jvmciRuntime.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 // Performance counters
138 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
139 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
140 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
141
142 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
143 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
144 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
145 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
146 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
147
148 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
149 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
150 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
151 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
152
153 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
154 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
155 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
156 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
157 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
158 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
159 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
160
161 // Timers and counters for generating statistics
162 elapsedTimer CompileBroker::_t_total_compilation;
163 elapsedTimer CompileBroker::_t_osr_compilation;
164 elapsedTimer CompileBroker::_t_standard_compilation;
165 elapsedTimer CompileBroker::_t_invalidated_compilation;
166 elapsedTimer CompileBroker::_t_bailedout_compilation;
167
168 int CompileBroker::_total_bailout_count = 0;
169 int CompileBroker::_total_invalidated_count = 0;
170 int CompileBroker::_total_compile_count = 0;
171 int CompileBroker::_total_osr_compile_count = 0;
172 int CompileBroker::_total_standard_compile_count = 0;
173 int CompileBroker::_total_compiler_stopped_count = 0;
174 int CompileBroker::_total_compiler_restarted_count = 0;
175
176 int CompileBroker::_sum_osr_bytes_compiled = 0;
177 int CompileBroker::_sum_standard_bytes_compiled = 0;
178 int CompileBroker::_sum_nmethod_size = 0;
179 int CompileBroker::_sum_nmethod_code_size = 0;
180
181 long CompileBroker::_peak_compilation_time = 0;
182
183 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
184 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
185
186
187
188 class CompilationLog : public StringEventLog {
189 public:
190 CompilationLog() : StringEventLog("Compilation events") {
191 }
192
193 void log_compile(JavaThread* thread, CompileTask* task) {
194 StringLogMessage lm;
195 stringStream sstr(lm.buffer(), lm.size());
196 // msg.time_stamp().update_to(tty->time_stamp().ticks());
197 task->print(&sstr, NULL, true, false);
198 log(thread, "%s", (const char*)lm);
199 }
200
201 void log_nmethod(JavaThread* thread, nmethod* nm) {
202 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
203 nm->compile_id(), nm->is_osr_method() ? "%" : "",
204 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
205 }
206
207 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
208 StringLogMessage lm;
209 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
210 if (retry_message != NULL) {
211 lm.append(" (%s)", retry_message);
212 }
213 lm.print("\n");
214 log(thread, "%s", (const char*)lm);
215 }
216
217 void log_metaspace_failure(const char* reason) {
218 ResourceMark rm;
219 StringLogMessage lm;
220 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
221 lm.print("\n");
222 log(JavaThread::current(), "%s", (const char*)lm);
223 }
224 };
225
226 static CompilationLog* _compilation_log = NULL;
227
228 bool compileBroker_init() {
229 if (LogEvents) {
230 _compilation_log = new CompilationLog();
231 }
232
233 // init directives stack, adding default directive
234 DirectivesStack::init();
235
236 if (DirectivesParser::has_file()) {
237 return DirectivesParser::parse_from_flag();
238 } else if (CompilerDirectivesPrint) {
239 // Print default directive even when no other was added
240 DirectivesStack::print(tty);
241 }
242
243 return true;
244 }
245
246 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
247 CompilerThread* thread = CompilerThread::current();
248 thread->set_task(task);
249 #if INCLUDE_JVMCI
250 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
251 task->set_jvmci_compiler_thread(thread);
252 }
253 #endif
254 CompileLog* log = thread->log();
255 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
256 }
257
258 CompileTaskWrapper::~CompileTaskWrapper() {
259 CompilerThread* thread = CompilerThread::current();
260 CompileTask* task = thread->task();
261 CompileLog* log = thread->log();
262 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
263 thread->set_task(NULL);
264 task->set_code_handle(NULL);
265 thread->set_env(NULL);
266 if (task->is_blocking()) {
267 bool free_task = false;
268 {
269 MutexLocker notifier(task->lock(), thread);
270 task->mark_complete();
271 #if INCLUDE_JVMCI
272 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
273 if (!task->has_waiter()) {
274 // The waiting thread timed out and thus did not free the task.
275 free_task = true;
276 }
277 task->set_jvmci_compiler_thread(NULL);
278 }
279 #endif
280 if (!free_task) {
281 // Notify the waiting thread that the compilation has completed
282 // so that it can free the task.
283 task->lock()->notify_all();
284 }
285 }
286 if (free_task) {
287 // The task can only be freed once the task lock is released.
288 CompileTask::free(task);
289 }
290 } else {
291 task->mark_complete();
292
293 // By convention, the compiling thread is responsible for
294 // recycling a non-blocking CompileTask.
295 CompileTask::free(task);
296 }
297 }
298
299 /**
300 * Check if a CompilerThread can be removed and update count if requested.
301 */
302 static bool can_remove(CompilerThread *ct, bool do_it) {
303 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
304 if (!ReduceNumberOfCompilerThreads) return false;
305
306 AbstractCompiler *compiler = ct->compiler();
307 int compiler_count = compiler->num_compiler_threads();
308 bool c1 = compiler->is_c1();
309
310 // Keep at least 1 compiler thread of each type.
311 if (compiler_count < 2) return false;
312
313 // Keep thread alive for at least some time.
314 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
315
316 // We only allow the last compiler thread of each type to get removed.
317 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
318 : CompileBroker::compiler2_object(compiler_count - 1);
319 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
320 if (do_it) {
321 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
322 compiler->set_num_compiler_threads(compiler_count - 1);
323 }
324 return true;
325 }
326 return false;
327 }
328
329 /**
330 * Add a CompileTask to a CompileQueue.
331 */
332 void CompileQueue::add(CompileTask* task) {
333 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
334
335 task->set_next(NULL);
336 task->set_prev(NULL);
337
338 if (_last == NULL) {
339 // The compile queue is empty.
340 assert(_first == NULL, "queue is empty");
341 _first = task;
342 _last = task;
343 } else {
344 // Append the task to the queue.
345 assert(_last->next() == NULL, "not last");
346 _last->set_next(task);
347 task->set_prev(_last);
348 _last = task;
349 }
350 ++_size;
351
352 // Mark the method as being in the compile queue.
353 task->method()->set_queued_for_compilation();
354
355 if (CIPrintCompileQueue) {
356 print_tty();
357 }
358
359 if (LogCompilation && xtty != NULL) {
360 task->log_task_queued();
361 }
362
363 // Notify CompilerThreads that a task is available.
364 MethodCompileQueue_lock->notify_all();
365 }
366
367 /**
368 * Empties compilation queue by putting all compilation tasks onto
369 * a freelist. Furthermore, the method wakes up all threads that are
370 * waiting on a compilation task to finish. This can happen if background
371 * compilation is disabled.
372 */
373 void CompileQueue::free_all() {
374 MutexLocker mu(MethodCompileQueue_lock);
375 CompileTask* next = _first;
376
377 // Iterate over all tasks in the compile queue
378 while (next != NULL) {
379 CompileTask* current = next;
380 next = current->next();
381 {
382 // Wake up thread that blocks on the compile task.
383 MutexLocker ct_lock(current->lock());
384 current->lock()->notify();
385 }
386 // Put the task back on the freelist.
387 CompileTask::free(current);
388 }
389 _first = NULL;
390
391 // Wake up all threads that block on the queue.
392 MethodCompileQueue_lock->notify_all();
393 }
394
395 /**
396 * Get the next CompileTask from a CompileQueue
397 */
398 CompileTask* CompileQueue::get() {
399 // save methods from RedefineClasses across safepoint
400 // across MethodCompileQueue_lock below.
401 methodHandle save_method;
402 methodHandle save_hot_method;
403
404 MonitorLocker locker(MethodCompileQueue_lock);
405 // If _first is NULL we have no more compile jobs. There are two reasons for
406 // having no compile jobs: First, we compiled everything we wanted. Second,
407 // we ran out of code cache so compilation has been disabled. In the latter
408 // case we perform code cache sweeps to free memory such that we can re-enable
409 // compilation.
410 while (_first == NULL) {
411 // Exit loop if compilation is disabled forever
412 if (CompileBroker::is_compilation_disabled_forever()) {
413 return NULL;
414 }
415
416 // If there are no compilation tasks and we can compile new jobs
417 // (i.e., there is enough free space in the code cache) there is
418 // no need to invoke the sweeper. As a result, the hotness of methods
419 // remains unchanged. This behavior is desired, since we want to keep
420 // the stable state, i.e., we do not want to evict methods from the
421 // code cache if it is unnecessary.
422 // We need a timed wait here, since compiler threads can exit if compilation
423 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
424 // is not critical and we do not want idle compiler threads to wake up too often.
425 locker.wait(5*1000);
426
427 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
428 // Still nothing to compile. Give caller a chance to stop this thread.
429 if (can_remove(CompilerThread::current(), false)) return NULL;
430 }
431 }
432
433 if (CompileBroker::is_compilation_disabled_forever()) {
434 return NULL;
435 }
436
437 CompileTask* task;
438 {
439 NoSafepointVerifier nsv;
440 task = CompilationPolicy::policy()->select_task(this);
441 if (task != NULL) {
442 task = task->select_for_compilation();
443 }
444 }
445
446 if (task != NULL) {
447 // Save method pointers across unlock safepoint. The task is removed from
448 // the compilation queue, which is walked during RedefineClasses.
449 save_method = methodHandle(task->method());
450 save_hot_method = methodHandle(task->hot_method());
451
452 remove(task);
453 }
454 purge_stale_tasks(); // may temporarily release MCQ lock
455 return task;
456 }
457
458 // Clean & deallocate stale compile tasks.
459 // Temporarily releases MethodCompileQueue lock.
460 void CompileQueue::purge_stale_tasks() {
461 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
462 if (_first_stale != NULL) {
463 // Stale tasks are purged when MCQ lock is released,
464 // but _first_stale updates are protected by MCQ lock.
465 // Once task processing starts and MCQ lock is released,
466 // other compiler threads can reuse _first_stale.
467 CompileTask* head = _first_stale;
468 _first_stale = NULL;
469 {
470 MutexUnlocker ul(MethodCompileQueue_lock);
471 for (CompileTask* task = head; task != NULL; ) {
472 CompileTask* next_task = task->next();
473 CompileTaskWrapper ctw(task); // Frees the task
474 task->set_failure_reason("stale task");
475 task = next_task;
476 }
477 }
478 }
479 }
480
481 void CompileQueue::remove(CompileTask* task) {
482 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
483 if (task->prev() != NULL) {
484 task->prev()->set_next(task->next());
485 } else {
486 // max is the first element
487 assert(task == _first, "Sanity");
488 _first = task->next();
489 }
490
491 if (task->next() != NULL) {
492 task->next()->set_prev(task->prev());
493 } else {
494 // max is the last element
495 assert(task == _last, "Sanity");
496 _last = task->prev();
497 }
498 --_size;
499 }
500
501 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
502 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
503 remove(task);
504
505 // Enqueue the task for reclamation (should be done outside MCQ lock)
506 task->set_next(_first_stale);
507 task->set_prev(NULL);
508 _first_stale = task;
509 }
510
511 // methods in the compile queue need to be marked as used on the stack
512 // so that they don't get reclaimed by Redefine Classes
513 void CompileQueue::mark_on_stack() {
514 CompileTask* task = _first;
515 while (task != NULL) {
516 task->mark_on_stack();
517 task = task->next();
518 }
519 }
520
521
522 CompileQueue* CompileBroker::compile_queue(int comp_level) {
523 if (is_c2_compile(comp_level)) return _c2_compile_queue;
524 if (is_c1_compile(comp_level)) return _c1_compile_queue;
525 return NULL;
526 }
527
528 void CompileBroker::print_compile_queues(outputStream* st) {
529 st->print_cr("Current compiles: ");
530
531 char buf[2000];
532 int buflen = sizeof(buf);
533 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
534
535 st->cr();
536 if (_c1_compile_queue != NULL) {
537 _c1_compile_queue->print(st);
538 }
539 if (_c2_compile_queue != NULL) {
540 _c2_compile_queue->print(st);
541 }
542 }
543
544 void CompileQueue::print(outputStream* st) {
545 assert_locked_or_safepoint(MethodCompileQueue_lock);
546 st->print_cr("%s:", name());
547 CompileTask* task = _first;
548 if (task == NULL) {
549 st->print_cr("Empty");
550 } else {
551 while (task != NULL) {
552 task->print(st, NULL, true, true);
553 task = task->next();
554 }
555 }
556 st->cr();
557 }
558
559 void CompileQueue::print_tty() {
560 ttyLocker ttyl;
561 print(tty);
562 }
563
564 CompilerCounters::CompilerCounters() {
565 _current_method[0] = '\0';
566 _compile_type = CompileBroker::no_compile;
567 }
568
569 // ------------------------------------------------------------------
570 // CompileBroker::compilation_init
571 //
572 // Initialize the Compilation object
573 void CompileBroker::compilation_init_phase1(TRAPS) {
574 // No need to initialize compilation system if we do not use it.
575 if (!UseCompiler) {
576 return;
577 }
578 // Set the interface to the current compiler(s).
579 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
580 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
581
582 #if INCLUDE_JVMCI
583 if (EnableJVMCI) {
584 // This is creating a JVMCICompiler singleton.
585 JVMCICompiler* jvmci = new JVMCICompiler();
586
587 if (UseJVMCICompiler) {
588 _compilers[1] = jvmci;
589 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
590 if (BootstrapJVMCI) {
591 // JVMCI will bootstrap so give it more threads
592 _c2_count = MIN2(32, os::active_processor_count());
593 }
594 } else {
595 _c2_count = JVMCIThreads;
596 }
597 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
598 } else {
599 _c1_count = JVMCIHostThreads;
600 }
601 }
602 }
603 #endif // INCLUDE_JVMCI
604
605 #ifdef COMPILER1
606 if (_c1_count > 0) {
607 _compilers[0] = new Compiler();
608 }
609 #endif // COMPILER1
610
611 #ifdef COMPILER2
612 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
613 if (_c2_count > 0) {
614 _compilers[1] = new C2Compiler();
615 }
616 }
617 #endif // COMPILER2
618
619 // Start the compiler thread(s) and the sweeper thread
620 init_compiler_sweeper_threads();
621 // totalTime performance counter is always created as it is required
622 // by the implementation of java.lang.management.CompilationMBean.
623 {
624 EXCEPTION_MARK;
625 _perf_total_compilation =
626 PerfDataManager::create_counter(JAVA_CI, "totalTime",
627 PerfData::U_Ticks, CHECK);
628 }
629
630 if (UsePerfData) {
631
632 EXCEPTION_MARK;
633
634 // create the jvmstat performance counters
635 _perf_osr_compilation =
636 PerfDataManager::create_counter(SUN_CI, "osrTime",
637 PerfData::U_Ticks, CHECK);
638
639 _perf_standard_compilation =
640 PerfDataManager::create_counter(SUN_CI, "standardTime",
641 PerfData::U_Ticks, CHECK);
642
643 _perf_total_bailout_count =
644 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
645 PerfData::U_Events, CHECK);
646
647 _perf_total_invalidated_count =
648 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
649 PerfData::U_Events, CHECK);
650
651 _perf_total_compile_count =
652 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
653 PerfData::U_Events, CHECK);
654 _perf_total_osr_compile_count =
655 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
656 PerfData::U_Events, CHECK);
657
658 _perf_total_standard_compile_count =
659 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
660 PerfData::U_Events, CHECK);
661
662 _perf_sum_osr_bytes_compiled =
663 PerfDataManager::create_counter(SUN_CI, "osrBytes",
664 PerfData::U_Bytes, CHECK);
665
666 _perf_sum_standard_bytes_compiled =
667 PerfDataManager::create_counter(SUN_CI, "standardBytes",
668 PerfData::U_Bytes, CHECK);
669
670 _perf_sum_nmethod_size =
671 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
672 PerfData::U_Bytes, CHECK);
673
674 _perf_sum_nmethod_code_size =
675 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
676 PerfData::U_Bytes, CHECK);
677
678 _perf_last_method =
679 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
680 CompilerCounters::cmname_buffer_length,
681 "", CHECK);
682
683 _perf_last_failed_method =
684 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
685 CompilerCounters::cmname_buffer_length,
686 "", CHECK);
687
688 _perf_last_invalidated_method =
689 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
690 CompilerCounters::cmname_buffer_length,
691 "", CHECK);
692
693 _perf_last_compile_type =
694 PerfDataManager::create_variable(SUN_CI, "lastType",
695 PerfData::U_None,
696 (jlong)CompileBroker::no_compile,
697 CHECK);
698
699 _perf_last_compile_size =
700 PerfDataManager::create_variable(SUN_CI, "lastSize",
701 PerfData::U_Bytes,
702 (jlong)CompileBroker::no_compile,
703 CHECK);
704
705
706 _perf_last_failed_type =
707 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
708 PerfData::U_None,
709 (jlong)CompileBroker::no_compile,
710 CHECK);
711
712 _perf_last_invalidated_type =
713 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
714 PerfData::U_None,
715 (jlong)CompileBroker::no_compile,
716 CHECK);
717 }
718 }
719
720 // Completes compiler initialization. Compilation requests submitted
721 // prior to this will be silently ignored.
722 void CompileBroker::compilation_init_phase2() {
723 _initialized = true;
724 }
725
726 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
727 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
728 Handle thread_group(THREAD, Universe::system_thread_group());
729 return JavaCalls::construct_new_instance(
730 SystemDictionary::Thread_klass(),
731 vmSymbols::threadgroup_string_void_signature(),
732 thread_group,
733 string,
734 CHECK_NH);
735 }
736
737
738 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) {
739 JavaThread* thread = NULL;
740 {
741 MutexLocker mu(Threads_lock, THREAD);
742 if (comp != NULL) {
743 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
744 CompilerCounters* counters = new CompilerCounters();
745 thread = new CompilerThread(queue, counters);
746 }
747 } else {
748 thread = new CodeCacheSweeperThread();
749 }
750 // At this point the new CompilerThread data-races with this startup
751 // thread (which I believe is the primoridal thread and NOT the VM
752 // thread). This means Java bytecodes being executed at startup can
753 // queue compile jobs which will run at whatever default priority the
754 // newly created CompilerThread runs at.
755
756
757 // At this point it may be possible that no osthread was created for the
758 // JavaThread due to lack of memory. We would have to throw an exception
759 // in that case. However, since this must work and we do not allow
760 // exceptions anyway, check and abort if this fails. But first release the
761 // lock.
762
763 if (thread != NULL && thread->osthread() != NULL) {
764
765 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
766
767 // Note that this only sets the JavaThread _priority field, which by
768 // definition is limited to Java priorities and not OS priorities.
769 // The os-priority is set in the CompilerThread startup code itself
770
771 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
772
773 // Note that we cannot call os::set_priority because it expects Java
774 // priorities and we are *explicitly* using OS priorities so that it's
775 // possible to set the compiler thread priority higher than any Java
776 // thread.
777
778 int native_prio = CompilerThreadPriority;
779 if (native_prio == -1) {
780 if (UseCriticalCompilerThreadPriority) {
781 native_prio = os::java_to_os_priority[CriticalPriority];
782 } else {
783 native_prio = os::java_to_os_priority[NearMaxPriority];
784 }
785 }
786 os::set_native_priority(thread, native_prio);
787
788 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
789
790 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
791 if (comp != NULL) {
792 thread->as_CompilerThread()->set_compiler(comp);
793 }
794 Threads::add(thread);
795 Thread::start(thread);
796 }
797 }
798
799 // First release lock before aborting VM.
800 if (thread == NULL || thread->osthread() == NULL) {
801 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
802 if (thread != NULL) {
803 thread->smr_delete();
804 }
805 return NULL;
806 }
807 vm_exit_during_initialization("java.lang.OutOfMemoryError",
808 os::native_thread_creation_failed_msg());
809 }
810
811 // Let go of Threads_lock before yielding
812 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
813
814 return thread;
815 }
816
817
818 void CompileBroker::init_compiler_sweeper_threads() {
819 EXCEPTION_MARK;
820 #if !defined(ZERO)
821 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
822 #endif // !ZERO
823 // Initialize the compilation queue
824 if (_c2_count > 0) {
825 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
826 _c2_compile_queue = new CompileQueue(name);
827 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
828 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
829 }
830 if (_c1_count > 0) {
831 _c1_compile_queue = new CompileQueue("C1 compile queue");
832 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
833 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
834 }
835
836 char name_buffer[256];
837
838 for (int i = 0; i < _c2_count; i++) {
839 // Create a name for our thread.
840 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
841 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
842 jobject thread_handle = JNIHandles::make_global(thread_oop);
843 _compiler2_objects[i] = thread_handle;
844 _compiler2_logs[i] = NULL;
845
846 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
847 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK);
848 assert(ct != NULL, "should have been handled for initial thread");
849 _compilers[1]->set_num_compiler_threads(i + 1);
850 if (TraceCompilerThreads) {
851 ResourceMark rm;
852 MutexLocker mu(Threads_lock);
853 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
854 }
855 }
856 }
857
858 for (int i = 0; i < _c1_count; i++) {
859 // Create a name for our thread.
860 sprintf(name_buffer, "C1 CompilerThread%d", i);
861 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
862 jobject thread_handle = JNIHandles::make_global(thread_oop);
863 _compiler1_objects[i] = thread_handle;
864 _compiler1_logs[i] = NULL;
865
866 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
867 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK);
868 assert(ct != NULL, "should have been handled for initial thread");
869 _compilers[0]->set_num_compiler_threads(i + 1);
870 if (TraceCompilerThreads) {
871 ResourceMark rm;
872 MutexLocker mu(Threads_lock);
873 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
874 }
875 }
876 }
877
878 if (UsePerfData) {
879 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
880 }
881
882 if (MethodFlushing) {
883 // Initialize the sweeper thread
884 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
885 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
886 make_thread(thread_handle, NULL, NULL, CHECK);
887 }
888 }
889
890 void CompileBroker::possibly_add_compiler_threads() {
891 EXCEPTION_MARK;
892
893 julong available_memory = os::available_memory();
894 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
895 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
896 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
897
898 // Only do attempt to start additional threads if the lock is free.
899 if (!CompileThread_lock->try_lock()) return;
900
901 if (_c2_compile_queue != NULL) {
902 int old_c2_count = _compilers[1]->num_compiler_threads();
903 int new_c2_count = MIN4(_c2_count,
904 _c2_compile_queue->size() / 2,
905 (int)(available_memory / (200*M)),
906 (int)(available_cc_np / (128*K)));
907
908 for (int i = old_c2_count; i < new_c2_count; i++) {
909 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK);
910 if (ct == NULL) break;
911 _compilers[1]->set_num_compiler_threads(i + 1);
912 if (TraceCompilerThreads) {
913 ResourceMark rm;
914 MutexLocker mu(Threads_lock);
915 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
916 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
917 }
918 }
919 }
920
921 if (_c1_compile_queue != NULL) {
922 int old_c1_count = _compilers[0]->num_compiler_threads();
923 int new_c1_count = MIN4(_c1_count,
924 _c1_compile_queue->size() / 4,
925 (int)(available_memory / (100*M)),
926 (int)(available_cc_p / (128*K)));
927
928 for (int i = old_c1_count; i < new_c1_count; i++) {
929 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK);
930 if (ct == NULL) break;
931 _compilers[0]->set_num_compiler_threads(i + 1);
932 if (TraceCompilerThreads) {
933 ResourceMark rm;
934 MutexLocker mu(Threads_lock);
935 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
936 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
937 }
938 }
939 }
940
941 CompileThread_lock->unlock();
942 }
943
944
945 /**
946 * Set the methods on the stack as on_stack so that redefine classes doesn't
947 * reclaim them. This method is executed at a safepoint.
948 */
949 void CompileBroker::mark_on_stack() {
950 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
951 // Since we are at a safepoint, we do not need a lock to access
952 // the compile queues.
953 if (_c2_compile_queue != NULL) {
954 _c2_compile_queue->mark_on_stack();
955 }
956 if (_c1_compile_queue != NULL) {
957 _c1_compile_queue->mark_on_stack();
958 }
959 }
960
961 // ------------------------------------------------------------------
962 // CompileBroker::compile_method
963 //
964 // Request compilation of a method.
965 void CompileBroker::compile_method_base(const methodHandle& method,
966 int osr_bci,
967 int comp_level,
968 const methodHandle& hot_method,
969 int hot_count,
970 CompileTask::CompileReason compile_reason,
971 bool blocking,
972 Thread* thread) {
973 guarantee(!method->is_abstract(), "cannot compile abstract methods");
974 assert(method->method_holder()->is_instance_klass(),
975 "sanity check");
976 assert(!method->method_holder()->is_not_initialized(),
977 "method holder must be initialized");
978 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
979
980 if (CIPrintRequests) {
981 tty->print("request: ");
982 method->print_short_name(tty);
983 if (osr_bci != InvocationEntryBci) {
984 tty->print(" osr_bci: %d", osr_bci);
985 }
986 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
987 if (!hot_method.is_null()) {
988 tty->print(" hot: ");
989 if (hot_method() != method()) {
990 hot_method->print_short_name(tty);
991 } else {
992 tty->print("yes");
993 }
994 }
995 tty->cr();
996 }
997
998 // A request has been made for compilation. Before we do any
999 // real work, check to see if the method has been compiled
1000 // in the meantime with a definitive result.
1001 if (compilation_is_complete(method, osr_bci, comp_level)) {
1002 return;
1003 }
1004
1005 #ifndef PRODUCT
1006 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1007 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1008 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1009 return;
1010 }
1011 }
1012 #endif
1013
1014 // If this method is already in the compile queue, then
1015 // we do not block the current thread.
1016 if (compilation_is_in_queue(method)) {
1017 // We may want to decay our counter a bit here to prevent
1018 // multiple denied requests for compilation. This is an
1019 // open compilation policy issue. Note: The other possibility,
1020 // in the case that this is a blocking compile request, is to have
1021 // all subsequent blocking requesters wait for completion of
1022 // ongoing compiles. Note that in this case we'll need a protocol
1023 // for freeing the associated compile tasks. [Or we could have
1024 // a single static monitor on which all these waiters sleep.]
1025 return;
1026 }
1027
1028 if (TieredCompilation) {
1029 // Tiered policy requires MethodCounters to exist before adding a method to
1030 // the queue. Create if we don't have them yet.
1031 method->get_method_counters(thread);
1032 }
1033
1034 // Outputs from the following MutexLocker block:
1035 CompileTask* task = NULL;
1036 CompileQueue* queue = compile_queue(comp_level);
1037
1038 // Acquire our lock.
1039 {
1040 MutexLocker locker(MethodCompileQueue_lock, thread);
1041
1042 // Make sure the method has not slipped into the queues since
1043 // last we checked; note that those checks were "fast bail-outs".
1044 // Here we need to be more careful, see 14012000 below.
1045 if (compilation_is_in_queue(method)) {
1046 return;
1047 }
1048
1049 // We need to check again to see if the compilation has
1050 // completed. A previous compilation may have registered
1051 // some result.
1052 if (compilation_is_complete(method, osr_bci, comp_level)) {
1053 return;
1054 }
1055
1056 // We now know that this compilation is not pending, complete,
1057 // or prohibited. Assign a compile_id to this compilation
1058 // and check to see if it is in our [Start..Stop) range.
1059 int compile_id = assign_compile_id(method, osr_bci);
1060 if (compile_id == 0) {
1061 // The compilation falls outside the allowed range.
1062 return;
1063 }
1064
1065 #if INCLUDE_JVMCI
1066 if (UseJVMCICompiler && blocking) {
1067 // Don't allow blocking compiles for requests triggered by JVMCI.
1068 if (thread->is_Compiler_thread()) {
1069 blocking = false;
1070 }
1071
1072 if (!UseJVMCINativeLibrary) {
1073 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1074 vframeStream vfst((JavaThread*) thread);
1075 for (; !vfst.at_end(); vfst.next()) {
1076 if (vfst.method()->is_static_initializer() ||
1077 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1078 vfst.method()->name() == vmSymbols::loadClass_name())) {
1079 blocking = false;
1080 break;
1081 }
1082 }
1083 }
1084
1085 // Don't allow blocking compilation requests to JVMCI
1086 // if JVMCI itself is not yet initialized
1087 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1088 blocking = false;
1089 }
1090
1091 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1092 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1093 // such as the DestroyJavaVM thread.
1094 if (JVMCI::shutdown_called()) {
1095 blocking = false;
1096 }
1097 }
1098 #endif // INCLUDE_JVMCI
1099
1100 // We will enter the compilation in the queue.
1101 // 14012000: Note that this sets the queued_for_compile bits in
1102 // the target method. We can now reason that a method cannot be
1103 // queued for compilation more than once, as follows:
1104 // Before a thread queues a task for compilation, it first acquires
1105 // the compile queue lock, then checks if the method's queued bits
1106 // are set or it has already been compiled. Thus there can not be two
1107 // instances of a compilation task for the same method on the
1108 // compilation queue. Consider now the case where the compilation
1109 // thread has already removed a task for that method from the queue
1110 // and is in the midst of compiling it. In this case, the
1111 // queued_for_compile bits must be set in the method (and these
1112 // will be visible to the current thread, since the bits were set
1113 // under protection of the compile queue lock, which we hold now.
1114 // When the compilation completes, the compiler thread first sets
1115 // the compilation result and then clears the queued_for_compile
1116 // bits. Neither of these actions are protected by a barrier (or done
1117 // under the protection of a lock), so the only guarantee we have
1118 // (on machines with TSO (Total Store Order)) is that these values
1119 // will update in that order. As a result, the only combinations of
1120 // these bits that the current thread will see are, in temporal order:
1121 // <RESULT, QUEUE> :
1122 // <0, 1> : in compile queue, but not yet compiled
1123 // <1, 1> : compiled but queue bit not cleared
1124 // <1, 0> : compiled and queue bit cleared
1125 // Because we first check the queue bits then check the result bits,
1126 // we are assured that we cannot introduce a duplicate task.
1127 // Note that if we did the tests in the reverse order (i.e. check
1128 // result then check queued bit), we could get the result bit before
1129 // the compilation completed, and the queue bit after the compilation
1130 // completed, and end up introducing a "duplicate" (redundant) task.
1131 // In that case, the compiler thread should first check if a method
1132 // has already been compiled before trying to compile it.
1133 // NOTE: in the event that there are multiple compiler threads and
1134 // there is de-optimization/recompilation, things will get hairy,
1135 // and in that case it's best to protect both the testing (here) of
1136 // these bits, and their updating (here and elsewhere) under a
1137 // common lock.
1138 task = create_compile_task(queue,
1139 compile_id, method,
1140 osr_bci, comp_level,
1141 hot_method, hot_count, compile_reason,
1142 blocking);
1143 }
1144
1145 if (blocking) {
1146 wait_for_completion(task);
1147 }
1148 }
1149
1150 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1151 int comp_level,
1152 const methodHandle& hot_method, int hot_count,
1153 CompileTask::CompileReason compile_reason,
1154 Thread* THREAD) {
1155 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1156 if (!_initialized || comp_level == CompLevel_none) {
1157 return NULL;
1158 }
1159
1160 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1161 assert(comp != NULL, "Ensure we have a compiler");
1162
1163 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1164 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1165 DirectivesStack::release(directive);
1166 return nm;
1167 }
1168
1169 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1170 int comp_level,
1171 const methodHandle& hot_method, int hot_count,
1172 CompileTask::CompileReason compile_reason,
1173 DirectiveSet* directive,
1174 Thread* THREAD) {
1175
1176 // make sure arguments make sense
1177 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1178 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1179 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1180 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1181 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1182 // allow any levels for WhiteBox
1183 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1184 // return quickly if possible
1185
1186 // lock, make sure that the compilation
1187 // isn't prohibited in a straightforward way.
1188 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1189 if (comp == NULL || !comp->can_compile_method(method) ||
1190 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1191 return NULL;
1192 }
1193
1194 #if INCLUDE_JVMCI
1195 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1196 return NULL;
1197 }
1198 #endif
1199
1200 if (osr_bci == InvocationEntryBci) {
1201 // standard compilation
1202 CompiledMethod* method_code = method->code();
1203 if (method_code != NULL && method_code->is_nmethod()) {
1204 if (compilation_is_complete(method, osr_bci, comp_level)) {
1205 return (nmethod*) method_code;
1206 }
1207 }
1208 if (method->is_not_compilable(comp_level)) {
1209 return NULL;
1210 }
1211 } else {
1212 // osr compilation
1213 #ifndef TIERED
1214 // seems like an assert of dubious value
1215 assert(comp_level == CompLevel_highest_tier,
1216 "all OSR compiles are assumed to be at a single compilation level");
1217 #endif // TIERED
1218 // We accept a higher level osr method
1219 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1220 if (nm != NULL) return nm;
1221 if (method->is_not_osr_compilable(comp_level)) return NULL;
1222 }
1223
1224 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1225 // some prerequisites that are compiler specific
1226 if (comp->is_c2()) {
1227 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1228 // Resolve all classes seen in the signature of the method
1229 // we are compiling.
1230 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1231 }
1232
1233 // If the method is native, do the lookup in the thread requesting
1234 // the compilation. Native lookups can load code, which is not
1235 // permitted during compilation.
1236 //
1237 // Note: A native method implies non-osr compilation which is
1238 // checked with an assertion at the entry of this method.
1239 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1240 bool in_base_library;
1241 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1242 if (HAS_PENDING_EXCEPTION) {
1243 // In case of an exception looking up the method, we just forget
1244 // about it. The interpreter will kick-in and throw the exception.
1245 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1246 CLEAR_PENDING_EXCEPTION;
1247 return NULL;
1248 }
1249 assert(method->has_native_function(), "must have native code by now");
1250 }
1251
1252 // RedefineClasses() has replaced this method; just return
1253 if (method->is_old()) {
1254 return NULL;
1255 }
1256
1257 // JVMTI -- post_compile_event requires jmethod_id() that may require
1258 // a lock the compiling thread can not acquire. Prefetch it here.
1259 if (JvmtiExport::should_post_compiled_method_load()) {
1260 method->jmethod_id();
1261 }
1262
1263 // do the compilation
1264 if (method->is_native()) {
1265 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1266 // The following native methods:
1267 //
1268 // java.lang.Float.intBitsToFloat
1269 // java.lang.Float.floatToRawIntBits
1270 // java.lang.Double.longBitsToDouble
1271 // java.lang.Double.doubleToRawLongBits
1272 //
1273 // are called through the interpreter even if interpreter native stubs
1274 // are not preferred (i.e., calling through adapter handlers is preferred).
1275 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1276 // if the version of the methods from the native libraries is called.
1277 // As the interpreter and the C2-intrinsified version of the methods preserves
1278 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1279 if ((UseSSE >= 1 &&
1280 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1281 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1282 (UseSSE >= 2 &&
1283 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1284 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1285 return NULL;
1286 }
1287
1288 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1289 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1290 //
1291 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1292 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1293 AdapterHandlerLibrary::create_native_wrapper(method);
1294 } else {
1295 return NULL;
1296 }
1297 } else {
1298 // If the compiler is shut off due to code cache getting full
1299 // fail out now so blocking compiles dont hang the java thread
1300 if (!should_compile_new_jobs()) {
1301 CompilationPolicy::policy()->delay_compilation(method());
1302 return NULL;
1303 }
1304 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1305 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1306 }
1307
1308 // return requested nmethod
1309 // We accept a higher level osr method
1310 if (osr_bci == InvocationEntryBci) {
1311 CompiledMethod* code = method->code();
1312 if (code == NULL) {
1313 return (nmethod*) code;
1314 } else {
1315 return code->as_nmethod_or_null();
1316 }
1317 }
1318 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1319 }
1320
1321
1322 // ------------------------------------------------------------------
1323 // CompileBroker::compilation_is_complete
1324 //
1325 // See if compilation of this method is already complete.
1326 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1327 int osr_bci,
1328 int comp_level) {
1329 bool is_osr = (osr_bci != standard_entry_bci);
1330 if (is_osr) {
1331 if (method->is_not_osr_compilable(comp_level)) {
1332 return true;
1333 } else {
1334 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1335 return (result != NULL);
1336 }
1337 } else {
1338 if (method->is_not_compilable(comp_level)) {
1339 return true;
1340 } else {
1341 CompiledMethod* result = method->code();
1342 if (result == NULL) return false;
1343 return comp_level == result->comp_level();
1344 }
1345 }
1346 }
1347
1348
1349 /**
1350 * See if this compilation is already requested.
1351 *
1352 * Implementation note: there is only a single "is in queue" bit
1353 * for each method. This means that the check below is overly
1354 * conservative in the sense that an osr compilation in the queue
1355 * will block a normal compilation from entering the queue (and vice
1356 * versa). This can be remedied by a full queue search to disambiguate
1357 * cases. If it is deemed profitable, this may be done.
1358 */
1359 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1360 return method->queued_for_compilation();
1361 }
1362
1363 // ------------------------------------------------------------------
1364 // CompileBroker::compilation_is_prohibited
1365 //
1366 // See if this compilation is not allowed.
1367 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1368 bool is_native = method->is_native();
1369 // Some compilers may not support the compilation of natives.
1370 AbstractCompiler *comp = compiler(comp_level);
1371 if (is_native &&
1372 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1373 method->set_not_compilable_quietly("native methods not supported", comp_level);
1374 return true;
1375 }
1376
1377 bool is_osr = (osr_bci != standard_entry_bci);
1378 // Some compilers may not support on stack replacement.
1379 if (is_osr &&
1380 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1381 method->set_not_osr_compilable("OSR not supported", comp_level);
1382 return true;
1383 }
1384
1385 // The method may be explicitly excluded by the user.
1386 double scale;
1387 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1388 bool quietly = CompilerOracle::should_exclude_quietly();
1389 if (PrintCompilation && !quietly) {
1390 // This does not happen quietly...
1391 ResourceMark rm;
1392 tty->print("### Excluding %s:%s",
1393 method->is_native() ? "generation of native wrapper" : "compile",
1394 (method->is_static() ? " static" : ""));
1395 method->print_short_name(tty);
1396 tty->cr();
1397 }
1398 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1399 }
1400
1401 return false;
1402 }
1403
1404 /**
1405 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1406 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1407 * The function also allows to generate separate compilation IDs for OSR compilations.
1408 */
1409 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1410 #ifdef ASSERT
1411 bool is_osr = (osr_bci != standard_entry_bci);
1412 int id;
1413 if (method->is_native()) {
1414 assert(!is_osr, "can't be osr");
1415 // Adapters, native wrappers and method handle intrinsics
1416 // should be generated always.
1417 return Atomic::add(1, &_compilation_id);
1418 } else if (CICountOSR && is_osr) {
1419 id = Atomic::add(1, &_osr_compilation_id);
1420 if (CIStartOSR <= id && id < CIStopOSR) {
1421 return id;
1422 }
1423 } else {
1424 id = Atomic::add(1, &_compilation_id);
1425 if (CIStart <= id && id < CIStop) {
1426 return id;
1427 }
1428 }
1429
1430 // Method was not in the appropriate compilation range.
1431 method->set_not_compilable_quietly("Not in requested compile id range");
1432 return 0;
1433 #else
1434 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1435 // only _compilation_id is incremented.
1436 return Atomic::add(1, &_compilation_id);
1437 #endif
1438 }
1439
1440 // ------------------------------------------------------------------
1441 // CompileBroker::assign_compile_id_unlocked
1442 //
1443 // Public wrapper for assign_compile_id that acquires the needed locks
1444 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1445 MutexLocker locker(MethodCompileQueue_lock, thread);
1446 return assign_compile_id(method, osr_bci);
1447 }
1448
1449 // ------------------------------------------------------------------
1450 // CompileBroker::preload_classes
1451 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1452 // Move this code over from c1_Compiler.cpp
1453 ShouldNotReachHere();
1454 }
1455
1456
1457 // ------------------------------------------------------------------
1458 // CompileBroker::create_compile_task
1459 //
1460 // Create a CompileTask object representing the current request for
1461 // compilation. Add this task to the queue.
1462 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1463 int compile_id,
1464 const methodHandle& method,
1465 int osr_bci,
1466 int comp_level,
1467 const methodHandle& hot_method,
1468 int hot_count,
1469 CompileTask::CompileReason compile_reason,
1470 bool blocking) {
1471 CompileTask* new_task = CompileTask::allocate();
1472 new_task->initialize(compile_id, method, osr_bci, comp_level,
1473 hot_method, hot_count, compile_reason,
1474 blocking);
1475 queue->add(new_task);
1476 return new_task;
1477 }
1478
1479 #if INCLUDE_JVMCI
1480 // The number of milliseconds to wait before checking if
1481 // JVMCI compilation has made progress.
1482 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1483
1484 // The number of JVMCI compilation progress checks that must fail
1485 // before unblocking a thread waiting for a blocking compilation.
1486 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1487
1488 /**
1489 * Waits for a JVMCI compiler to complete a given task. This thread
1490 * waits until either the task completes or it sees no JVMCI compilation
1491 * progress for N consecutive milliseconds where N is
1492 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1493 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1494 *
1495 * @return true if this thread needs to free/recycle the task
1496 */
1497 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1498 MonitorLocker ml(task->lock(), thread);
1499 int progress_wait_attempts = 0;
1500 int methods_compiled = jvmci->methods_compiled();
1501 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1502 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1503 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1504
1505 bool progress;
1506 if (jvmci_compiler_thread != NULL) {
1507 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1508 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1509 !jvmci_compiler_thread->is_external_suspend();
1510 } else {
1511 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1512 // that all JVMCI compiler threads are blocked on. We use the counter for
1513 // successful JVMCI compilations to determine whether JVMCI compilation
1514 // is still making progress through the JVMCI compiler queue.
1515 progress = jvmci->methods_compiled() != methods_compiled;
1516 }
1517
1518 if (!progress) {
1519 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1520 if (PrintCompilation) {
1521 task->print(tty, "wait for blocking compilation timed out");
1522 }
1523 break;
1524 }
1525 } else {
1526 progress_wait_attempts = 0;
1527 if (jvmci_compiler_thread == NULL) {
1528 methods_compiled = jvmci->methods_compiled();
1529 }
1530 }
1531 }
1532 task->clear_waiter();
1533 return task->is_complete();
1534 }
1535 #endif
1536
1537 /**
1538 * Wait for the compilation task to complete.
1539 */
1540 void CompileBroker::wait_for_completion(CompileTask* task) {
1541 if (CIPrintCompileQueue) {
1542 ttyLocker ttyl;
1543 tty->print_cr("BLOCKING FOR COMPILE");
1544 }
1545
1546 assert(task->is_blocking(), "can only wait on blocking task");
1547
1548 JavaThread* thread = JavaThread::current();
1549 thread->set_blocked_on_compilation(true);
1550
1551 methodHandle method(thread, task->method());
1552 bool free_task;
1553 #if INCLUDE_JVMCI
1554 AbstractCompiler* comp = compiler(task->comp_level());
1555 if (comp->is_jvmci()) {
1556 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1557 } else
1558 #endif
1559 {
1560 MonitorLocker ml(task->lock(), thread);
1561 free_task = true;
1562 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1563 ml.wait();
1564 }
1565 }
1566
1567 thread->set_blocked_on_compilation(false);
1568 if (free_task) {
1569 if (is_compilation_disabled_forever()) {
1570 CompileTask::free(task);
1571 return;
1572 }
1573
1574 // It is harmless to check this status without the lock, because
1575 // completion is a stable property (until the task object is recycled).
1576 assert(task->is_complete(), "Compilation should have completed");
1577 assert(task->code_handle() == NULL, "must be reset");
1578
1579 // By convention, the waiter is responsible for recycling a
1580 // blocking CompileTask. Since there is only one waiter ever
1581 // waiting on a CompileTask, we know that no one else will
1582 // be using this CompileTask; we can free it.
1583 CompileTask::free(task);
1584 }
1585 }
1586
1587 /**
1588 * Initialize compiler thread(s) + compiler object(s). The postcondition
1589 * of this function is that the compiler runtimes are initialized and that
1590 * compiler threads can start compiling.
1591 */
1592 bool CompileBroker::init_compiler_runtime() {
1593 CompilerThread* thread = CompilerThread::current();
1594 AbstractCompiler* comp = thread->compiler();
1595 // Final sanity check - the compiler object must exist
1596 guarantee(comp != NULL, "Compiler object must exist");
1597
1598 int system_dictionary_modification_counter;
1599 {
1600 MutexLocker locker(Compile_lock, thread);
1601 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1602 }
1603
1604 {
1605 // Must switch to native to allocate ci_env
1606 ThreadToNativeFromVM ttn(thread);
1607 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1608 // Cache Jvmti state
1609 ci_env.cache_jvmti_state();
1610 // Cache DTrace flags
1611 ci_env.cache_dtrace_flags();
1612
1613 // Switch back to VM state to do compiler initialization
1614 ThreadInVMfromNative tv(thread);
1615 ResetNoHandleMark rnhm;
1616
1617 // Perform per-thread and global initializations
1618 comp->initialize();
1619 }
1620
1621 if (comp->is_failed()) {
1622 disable_compilation_forever();
1623 // If compiler initialization failed, no compiler thread that is specific to a
1624 // particular compiler runtime will ever start to compile methods.
1625 shutdown_compiler_runtime(comp, thread);
1626 return false;
1627 }
1628
1629 // C1 specific check
1630 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1631 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1632 return false;
1633 }
1634
1635 return true;
1636 }
1637
1638 /**
1639 * If C1 and/or C2 initialization failed, we shut down all compilation.
1640 * We do this to keep things simple. This can be changed if it ever turns
1641 * out to be a problem.
1642 */
1643 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1644 // Free buffer blob, if allocated
1645 if (thread->get_buffer_blob() != NULL) {
1646 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1647 CodeCache::free(thread->get_buffer_blob());
1648 }
1649
1650 if (comp->should_perform_shutdown()) {
1651 // There are two reasons for shutting down the compiler
1652 // 1) compiler runtime initialization failed
1653 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1654 warning("%s initialization failed. Shutting down all compilers", comp->name());
1655
1656 // Only one thread per compiler runtime object enters here
1657 // Set state to shut down
1658 comp->set_shut_down();
1659
1660 // Delete all queued compilation tasks to make compiler threads exit faster.
1661 if (_c1_compile_queue != NULL) {
1662 _c1_compile_queue->free_all();
1663 }
1664
1665 if (_c2_compile_queue != NULL) {
1666 _c2_compile_queue->free_all();
1667 }
1668
1669 // Set flags so that we continue execution with using interpreter only.
1670 UseCompiler = false;
1671 UseInterpreter = true;
1672
1673 // We could delete compiler runtimes also. However, there are references to
1674 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1675 // fail. This can be done later if necessary.
1676 }
1677 }
1678
1679 /**
1680 * Helper function to create new or reuse old CompileLog.
1681 */
1682 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1683 if (!LogCompilation) return NULL;
1684
1685 AbstractCompiler *compiler = ct->compiler();
1686 bool c1 = compiler->is_c1();
1687 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1688 assert(compiler_objects != NULL, "must be initialized at this point");
1689 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1690 assert(logs != NULL, "must be initialized at this point");
1691 int count = c1 ? _c1_count : _c2_count;
1692
1693 // Find Compiler number by its threadObj.
1694 oop compiler_obj = ct->threadObj();
1695 int compiler_number = 0;
1696 bool found = false;
1697 for (; compiler_number < count; compiler_number++) {
1698 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1699 found = true;
1700 break;
1701 }
1702 }
1703 assert(found, "Compiler must exist at this point");
1704
1705 // Determine pointer for this thread's log.
1706 CompileLog** log_ptr = &logs[compiler_number];
1707
1708 // Return old one if it exists.
1709 CompileLog* log = *log_ptr;
1710 if (log != NULL) {
1711 ct->init_log(log);
1712 return log;
1713 }
1714
1715 // Create a new one and remember it.
1716 init_compiler_thread_log();
1717 log = ct->log();
1718 *log_ptr = log;
1719 return log;
1720 }
1721
1722 // ------------------------------------------------------------------
1723 // CompileBroker::compiler_thread_loop
1724 //
1725 // The main loop run by a CompilerThread.
1726 void CompileBroker::compiler_thread_loop() {
1727 CompilerThread* thread = CompilerThread::current();
1728 CompileQueue* queue = thread->queue();
1729 // For the thread that initializes the ciObjectFactory
1730 // this resource mark holds all the shared objects
1731 ResourceMark rm;
1732
1733 // First thread to get here will initialize the compiler interface
1734
1735 {
1736 ASSERT_IN_VM;
1737 MutexLocker only_one (CompileThread_lock, thread);
1738 if (!ciObjectFactory::is_initialized()) {
1739 ciObjectFactory::initialize();
1740 }
1741 }
1742
1743 // Open a log.
1744 CompileLog* log = get_log(thread);
1745 if (log != NULL) {
1746 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1747 thread->name(),
1748 os::current_thread_id(),
1749 os::current_process_id());
1750 log->stamp();
1751 log->end_elem();
1752 }
1753
1754 // If compiler thread/runtime initialization fails, exit the compiler thread
1755 if (!init_compiler_runtime()) {
1756 return;
1757 }
1758
1759 thread->start_idle_timer();
1760
1761 // Poll for new compilation tasks as long as the JVM runs. Compilation
1762 // should only be disabled if something went wrong while initializing the
1763 // compiler runtimes. This, in turn, should not happen. The only known case
1764 // when compiler runtime initialization fails is if there is not enough free
1765 // space in the code cache to generate the necessary stubs, etc.
1766 while (!is_compilation_disabled_forever()) {
1767 // We need this HandleMark to avoid leaking VM handles.
1768 HandleMark hm(thread);
1769
1770 CompileTask* task = queue->get();
1771 if (task == NULL) {
1772 if (UseDynamicNumberOfCompilerThreads) {
1773 // Access compiler_count under lock to enforce consistency.
1774 MutexLocker only_one(CompileThread_lock);
1775 if (can_remove(thread, true)) {
1776 if (TraceCompilerThreads) {
1777 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1778 thread->name(), thread->idle_time_millis());
1779 }
1780 // Free buffer blob, if allocated
1781 if (thread->get_buffer_blob() != NULL) {
1782 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1783 CodeCache::free(thread->get_buffer_blob());
1784 }
1785 return; // Stop this thread.
1786 }
1787 }
1788 } else {
1789 // Assign the task to the current thread. Mark this compilation
1790 // thread as active for the profiler.
1791 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1792 // occurs after fetching the compile task off the queue.
1793 CompileTaskWrapper ctw(task);
1794 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1795 task->set_code_handle(&result_handle);
1796 methodHandle method(thread, task->method());
1797
1798 // Never compile a method if breakpoints are present in it
1799 if (method()->number_of_breakpoints() == 0) {
1800 // Compile the method.
1801 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1802 invoke_compiler_on_method(task);
1803 thread->start_idle_timer();
1804 } else {
1805 // After compilation is disabled, remove remaining methods from queue
1806 method->clear_queued_for_compilation();
1807 task->set_failure_reason("compilation is disabled");
1808 }
1809 }
1810
1811 if (UseDynamicNumberOfCompilerThreads) {
1812 possibly_add_compiler_threads();
1813 }
1814 }
1815 }
1816
1817 // Shut down compiler runtime
1818 shutdown_compiler_runtime(thread->compiler(), thread);
1819 }
1820
1821 // ------------------------------------------------------------------
1822 // CompileBroker::init_compiler_thread_log
1823 //
1824 // Set up state required by +LogCompilation.
1825 void CompileBroker::init_compiler_thread_log() {
1826 CompilerThread* thread = CompilerThread::current();
1827 char file_name[4*K];
1828 FILE* fp = NULL;
1829 intx thread_id = os::current_thread_id();
1830 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1831 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1832 if (dir == NULL) {
1833 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1834 thread_id, os::current_process_id());
1835 } else {
1836 jio_snprintf(file_name, sizeof(file_name),
1837 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1838 os::file_separator(), thread_id, os::current_process_id());
1839 }
1840
1841 fp = fopen(file_name, "wt");
1842 if (fp != NULL) {
1843 if (LogCompilation && Verbose) {
1844 tty->print_cr("Opening compilation log %s", file_name);
1845 }
1846 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1847 if (log == NULL) {
1848 fclose(fp);
1849 return;
1850 }
1851 thread->init_log(log);
1852
1853 if (xtty != NULL) {
1854 ttyLocker ttyl;
1855 // Record any per thread log files
1856 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1857 }
1858 return;
1859 }
1860 }
1861 warning("Cannot open log file: %s", file_name);
1862 }
1863
1864 void CompileBroker::log_metaspace_failure() {
1865 const char* message = "some methods may not be compiled because metaspace "
1866 "is out of memory";
1867 if (_compilation_log != NULL) {
1868 _compilation_log->log_metaspace_failure(message);
1869 }
1870 if (PrintCompilation) {
1871 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1872 }
1873 }
1874
1875
1876 // ------------------------------------------------------------------
1877 // CompileBroker::set_should_block
1878 //
1879 // Set _should_block.
1880 // Call this from the VM, with Threads_lock held and a safepoint requested.
1881 void CompileBroker::set_should_block() {
1882 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1883 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1884 #ifndef PRODUCT
1885 if (PrintCompilation && (Verbose || WizardMode))
1886 tty->print_cr("notifying compiler thread pool to block");
1887 #endif
1888 _should_block = true;
1889 }
1890
1891 // ------------------------------------------------------------------
1892 // CompileBroker::maybe_block
1893 //
1894 // Call this from the compiler at convenient points, to poll for _should_block.
1895 void CompileBroker::maybe_block() {
1896 if (_should_block) {
1897 #ifndef PRODUCT
1898 if (PrintCompilation && (Verbose || WizardMode))
1899 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1900 #endif
1901 ThreadInVMfromNative tivfn(JavaThread::current());
1902 }
1903 }
1904
1905 // wrapper for CodeCache::print_summary()
1906 static void codecache_print(bool detailed)
1907 {
1908 ResourceMark rm;
1909 stringStream s;
1910 // Dump code cache into a buffer before locking the tty,
1911 {
1912 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1913 CodeCache::print_summary(&s, detailed);
1914 }
1915 ttyLocker ttyl;
1916 tty->print("%s", s.as_string());
1917 }
1918
1919 // wrapper for CodeCache::print_summary() using outputStream
1920 static void codecache_print(outputStream* out, bool detailed) {
1921 ResourceMark rm;
1922 stringStream s;
1923
1924 // Dump code cache into a buffer
1925 {
1926 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1927 CodeCache::print_summary(&s, detailed);
1928 }
1929
1930 char* remaining_log = s.as_string();
1931 while (*remaining_log != '\0') {
1932 char* eol = strchr(remaining_log, '\n');
1933 if (eol == NULL) {
1934 out->print_cr("%s", remaining_log);
1935 remaining_log = remaining_log + strlen(remaining_log);
1936 } else {
1937 *eol = '\0';
1938 out->print_cr("%s", remaining_log);
1939 remaining_log = eol + 1;
1940 }
1941 }
1942 }
1943
1944 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1945 int compilable, const char* failure_reason) {
1946 if (success) {
1947 task->mark_success();
1948 if (ci_env != NULL) {
1949 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1950 }
1951 if (_compilation_log != NULL) {
1952 nmethod* code = task->code();
1953 if (code != NULL) {
1954 _compilation_log->log_nmethod(thread, code);
1955 }
1956 }
1957 } else if (AbortVMOnCompilationFailure) {
1958 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1959 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
1960 }
1961 if (compilable == ciEnv::MethodCompilable_never) {
1962 fatal("Never compilable: %s", failure_reason);
1963 }
1964 }
1965 // simulate crash during compilation
1966 assert(task->compile_id() != CICrashAt, "just as planned");
1967 }
1968
1969 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1970 assert(event != NULL, "invariant");
1971 assert(event->should_commit(), "invariant");
1972 event->set_method(task->method());
1973 event->set_compileId(task->compile_id());
1974 event->set_compileLevel(task->comp_level());
1975 event->set_succeded(task->is_success());
1976 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1977 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1978 event->set_inlinedBytes(task->num_inlined_bytecodes());
1979 event->commit();
1980 }
1981
1982 int DirectivesStack::_depth = 0;
1983 CompilerDirectives* DirectivesStack::_top = NULL;
1984 CompilerDirectives* DirectivesStack::_bottom = NULL;
1985
1986 // ------------------------------------------------------------------
1987 // CompileBroker::invoke_compiler_on_method
1988 //
1989 // Compile a method.
1990 //
1991 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1992 task->print_ul();
1993 if (PrintCompilation) {
1994 ResourceMark rm;
1995 task->print_tty();
1996 }
1997 elapsedTimer time;
1998
1999 CompilerThread* thread = CompilerThread::current();
2000 ResourceMark rm(thread);
2001
2002 if (LogEvents) {
2003 _compilation_log->log_compile(thread, task);
2004 }
2005
2006 // Common flags.
2007 uint compile_id = task->compile_id();
2008 int osr_bci = task->osr_bci();
2009 bool is_osr = (osr_bci != standard_entry_bci);
2010 bool should_log = (thread->log() != NULL);
2011 bool should_break = false;
2012 const int task_level = task->comp_level();
2013 AbstractCompiler* comp = task->compiler();
2014
2015 DirectiveSet* directive;
2016 {
2017 // create the handle inside it's own block so it can't
2018 // accidentally be referenced once the thread transitions to
2019 // native. The NoHandleMark before the transition should catch
2020 // any cases where this occurs in the future.
2021 methodHandle method(thread, task->method());
2022 assert(!method->is_native(), "no longer compile natives");
2023
2024 // Look up matching directives
2025 directive = DirectivesStack::getMatchingDirective(method, comp);
2026
2027 // Update compile information when using perfdata.
2028 if (UsePerfData) {
2029 update_compile_perf_data(thread, method, is_osr);
2030 }
2031
2032 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2033 }
2034
2035 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2036 if (should_log && !directive->LogOption) {
2037 should_log = false;
2038 }
2039
2040 // Allocate a new set of JNI handles.
2041 push_jni_handle_block();
2042 Method* target_handle = task->method();
2043 int compilable = ciEnv::MethodCompilable;
2044 const char* failure_reason = NULL;
2045 bool failure_reason_on_C_heap = false;
2046 const char* retry_message = NULL;
2047
2048 int system_dictionary_modification_counter;
2049 {
2050 MutexLocker locker(Compile_lock, thread);
2051 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2052 }
2053
2054 #if INCLUDE_JVMCI
2055 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2056 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2057
2058 TraceTime t1("compilation", &time);
2059 EventCompilation event;
2060
2061 // Skip redefined methods
2062 if (target_handle->is_old()) {
2063 failure_reason = "redefined method";
2064 retry_message = "not retryable";
2065 compilable = ciEnv::MethodCompilable_never;
2066 } else {
2067 JVMCICompileState compile_state(task, system_dictionary_modification_counter);
2068 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2069 methodHandle method(thread, target_handle);
2070 env.runtime()->compile_method(&env, jvmci, method, osr_bci);
2071
2072 failure_reason = compile_state.failure_reason();
2073 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2074 if (!compile_state.retryable()) {
2075 retry_message = "not retryable";
2076 compilable = ciEnv::MethodCompilable_not_at_tier;
2077 }
2078 if (task->code() == NULL) {
2079 assert(failure_reason != NULL, "must specify failure_reason");
2080 }
2081 }
2082 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2083 if (event.should_commit()) {
2084 post_compilation_event(&event, task);
2085 }
2086
2087 } else
2088 #endif // INCLUDE_JVMCI
2089 {
2090 NoHandleMark nhm;
2091 ThreadToNativeFromVM ttn(thread);
2092
2093 ciEnv ci_env(task, system_dictionary_modification_counter);
2094 if (should_break) {
2095 ci_env.set_break_at_compile(true);
2096 }
2097 if (should_log) {
2098 ci_env.set_log(thread->log());
2099 }
2100 assert(thread->env() == &ci_env, "set by ci_env");
2101 // The thread-env() field is cleared in ~CompileTaskWrapper.
2102
2103 // Cache Jvmti state
2104 ci_env.cache_jvmti_state();
2105
2106 // Cache DTrace flags
2107 ci_env.cache_dtrace_flags();
2108
2109 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2110
2111 TraceTime t1("compilation", &time);
2112 EventCompilation event;
2113
2114 if (comp == NULL) {
2115 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2116 } else {
2117 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2118 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2119 while (WhiteBox::compilation_locked) {
2120 locker.wait();
2121 }
2122 }
2123 comp->compile_method(&ci_env, target, osr_bci, directive);
2124 }
2125
2126 if (!ci_env.failing() && task->code() == NULL) {
2127 //assert(false, "compiler should always document failure");
2128 // The compiler elected, without comment, not to register a result.
2129 // Do not attempt further compilations of this method.
2130 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2131 }
2132
2133 // Copy this bit to the enclosing block:
2134 compilable = ci_env.compilable();
2135
2136 if (ci_env.failing()) {
2137 failure_reason = ci_env.failure_reason();
2138 retry_message = ci_env.retry_message();
2139 ci_env.report_failure(failure_reason);
2140 }
2141
2142 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2143 if (event.should_commit()) {
2144 post_compilation_event(&event, task);
2145 }
2146 }
2147 // Remove the JNI handle block after the ciEnv destructor has run in
2148 // the previous block.
2149 pop_jni_handle_block();
2150
2151 if (failure_reason != NULL) {
2152 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2153 if (_compilation_log != NULL) {
2154 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2155 }
2156 if (PrintCompilation) {
2157 FormatBufferResource msg = retry_message != NULL ?
2158 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2159 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2160 task->print(tty, msg);
2161 }
2162 }
2163
2164 methodHandle method(thread, task->method());
2165
2166 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2167
2168 collect_statistics(thread, time, task);
2169
2170 nmethod* nm = task->code();
2171 if (nm != NULL) {
2172 nm->maybe_print_nmethod(directive);
2173 }
2174 DirectivesStack::release(directive);
2175
2176 if (PrintCompilation && PrintCompilation2) {
2177 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2178 tty->print("%4d ", compile_id); // print compilation number
2179 tty->print("%s ", (is_osr ? "%" : " "));
2180 if (task->code() != NULL) {
2181 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2182 }
2183 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2184 }
2185
2186 Log(compilation, codecache) log;
2187 if (log.is_debug()) {
2188 LogStream ls(log.debug());
2189 codecache_print(&ls, /* detailed= */ false);
2190 }
2191 if (PrintCodeCacheOnCompilation) {
2192 codecache_print(/* detailed= */ false);
2193 }
2194 // Disable compilation, if required.
2195 switch (compilable) {
2196 case ciEnv::MethodCompilable_never:
2197 if (is_osr)
2198 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2199 else
2200 method->set_not_compilable_quietly("MethodCompilable_never");
2201 break;
2202 case ciEnv::MethodCompilable_not_at_tier:
2203 if (is_osr)
2204 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2205 else
2206 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2207 break;
2208 }
2209
2210 // Note that the queued_for_compilation bits are cleared without
2211 // protection of a mutex. [They were set by the requester thread,
2212 // when adding the task to the compile queue -- at which time the
2213 // compile queue lock was held. Subsequently, we acquired the compile
2214 // queue lock to get this task off the compile queue; thus (to belabour
2215 // the point somewhat) our clearing of the bits must be occurring
2216 // only after the setting of the bits. See also 14012000 above.
2217 method->clear_queued_for_compilation();
2218 }
2219
2220 /**
2221 * The CodeCache is full. Print warning and disable compilation.
2222 * Schedule code cache cleaning so compilation can continue later.
2223 * This function needs to be called only from CodeCache::allocate(),
2224 * since we currently handle a full code cache uniformly.
2225 */
2226 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2227 UseInterpreter = true;
2228 if (UseCompiler || AlwaysCompileLoopMethods ) {
2229 if (xtty != NULL) {
2230 ResourceMark rm;
2231 stringStream s;
2232 // Dump code cache state into a buffer before locking the tty,
2233 // because log_state() will use locks causing lock conflicts.
2234 CodeCache::log_state(&s);
2235 // Lock to prevent tearing
2236 ttyLocker ttyl;
2237 xtty->begin_elem("code_cache_full");
2238 xtty->print("%s", s.as_string());
2239 xtty->stamp();
2240 xtty->end_elem();
2241 }
2242
2243 #ifndef PRODUCT
2244 if (ExitOnFullCodeCache) {
2245 codecache_print(/* detailed= */ true);
2246 before_exit(JavaThread::current());
2247 exit_globals(); // will delete tty
2248 vm_direct_exit(1);
2249 }
2250 #endif
2251 if (UseCodeCacheFlushing) {
2252 // Since code cache is full, immediately stop new compiles
2253 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2254 NMethodSweeper::log_sweep("disable_compiler");
2255 }
2256 } else {
2257 disable_compilation_forever();
2258 }
2259
2260 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2261 }
2262 }
2263
2264 // ------------------------------------------------------------------
2265 // CompileBroker::update_compile_perf_data
2266 //
2267 // Record this compilation for debugging purposes.
2268 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2269 ResourceMark rm;
2270 char* method_name = method->name()->as_C_string();
2271 char current_method[CompilerCounters::cmname_buffer_length];
2272 size_t maxLen = CompilerCounters::cmname_buffer_length;
2273
2274 const char* class_name = method->method_holder()->name()->as_C_string();
2275
2276 size_t s1len = strlen(class_name);
2277 size_t s2len = strlen(method_name);
2278
2279 // check if we need to truncate the string
2280 if (s1len + s2len + 2 > maxLen) {
2281
2282 // the strategy is to lop off the leading characters of the
2283 // class name and the trailing characters of the method name.
2284
2285 if (s2len + 2 > maxLen) {
2286 // lop of the entire class name string, let snprintf handle
2287 // truncation of the method name.
2288 class_name += s1len; // null string
2289 }
2290 else {
2291 // lop off the extra characters from the front of the class name
2292 class_name += ((s1len + s2len + 2) - maxLen);
2293 }
2294 }
2295
2296 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2297
2298 int last_compile_type = normal_compile;
2299 if (CICountOSR && is_osr) {
2300 last_compile_type = osr_compile;
2301 }
2302
2303 CompilerCounters* counters = thread->counters();
2304 counters->set_current_method(current_method);
2305 counters->set_compile_type((jlong) last_compile_type);
2306 }
2307
2308 // ------------------------------------------------------------------
2309 // CompileBroker::push_jni_handle_block
2310 //
2311 // Push on a new block of JNI handles.
2312 void CompileBroker::push_jni_handle_block() {
2313 JavaThread* thread = JavaThread::current();
2314
2315 // Allocate a new block for JNI handles.
2316 // Inlined code from jni_PushLocalFrame()
2317 JNIHandleBlock* java_handles = thread->active_handles();
2318 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2319 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2320 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2321 thread->set_active_handles(compile_handles);
2322 }
2323
2324
2325 // ------------------------------------------------------------------
2326 // CompileBroker::pop_jni_handle_block
2327 //
2328 // Pop off the current block of JNI handles.
2329 void CompileBroker::pop_jni_handle_block() {
2330 JavaThread* thread = JavaThread::current();
2331
2332 // Release our JNI handle block
2333 JNIHandleBlock* compile_handles = thread->active_handles();
2334 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2335 thread->set_active_handles(java_handles);
2336 compile_handles->set_pop_frame_link(NULL);
2337 JNIHandleBlock::release_block(compile_handles, thread); // may block
2338 }
2339
2340 // ------------------------------------------------------------------
2341 // CompileBroker::collect_statistics
2342 //
2343 // Collect statistics about the compilation.
2344
2345 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2346 bool success = task->is_success();
2347 methodHandle method (thread, task->method());
2348 uint compile_id = task->compile_id();
2349 bool is_osr = (task->osr_bci() != standard_entry_bci);
2350 nmethod* code = task->code();
2351 CompilerCounters* counters = thread->counters();
2352
2353 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2354 MutexLocker locker(CompileStatistics_lock);
2355
2356 // _perf variables are production performance counters which are
2357 // updated regardless of the setting of the CITime and CITimeEach flags
2358 //
2359
2360 // account all time, including bailouts and failures in this counter;
2361 // C1 and C2 counters are counting both successful and unsuccessful compiles
2362 _t_total_compilation.add(time);
2363
2364 if (!success) {
2365 _total_bailout_count++;
2366 if (UsePerfData) {
2367 _perf_last_failed_method->set_value(counters->current_method());
2368 _perf_last_failed_type->set_value(counters->compile_type());
2369 _perf_total_bailout_count->inc();
2370 }
2371 _t_bailedout_compilation.add(time);
2372 } else if (code == NULL) {
2373 if (UsePerfData) {
2374 _perf_last_invalidated_method->set_value(counters->current_method());
2375 _perf_last_invalidated_type->set_value(counters->compile_type());
2376 _perf_total_invalidated_count->inc();
2377 }
2378 _total_invalidated_count++;
2379 _t_invalidated_compilation.add(time);
2380 } else {
2381 // Compilation succeeded
2382
2383 // update compilation ticks - used by the implementation of
2384 // java.lang.management.CompilationMBean
2385 _perf_total_compilation->inc(time.ticks());
2386 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2387
2388 if (CITime) {
2389 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2390 if (is_osr) {
2391 _t_osr_compilation.add(time);
2392 _sum_osr_bytes_compiled += bytes_compiled;
2393 } else {
2394 _t_standard_compilation.add(time);
2395 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2396 }
2397
2398 #if INCLUDE_JVMCI
2399 AbstractCompiler* comp = compiler(task->comp_level());
2400 if (comp) {
2401 CompilerStatistics* stats = comp->stats();
2402 if (stats) {
2403 if (is_osr) {
2404 stats->_osr.update(time, bytes_compiled);
2405 } else {
2406 stats->_standard.update(time, bytes_compiled);
2407 }
2408 stats->_nmethods_size += code->total_size();
2409 stats->_nmethods_code_size += code->insts_size();
2410 } else { // if (!stats)
2411 assert(false, "Compiler statistics object must exist");
2412 }
2413 } else { // if (!comp)
2414 assert(false, "Compiler object must exist");
2415 }
2416 #endif // INCLUDE_JVMCI
2417 }
2418
2419 if (UsePerfData) {
2420 // save the name of the last method compiled
2421 _perf_last_method->set_value(counters->current_method());
2422 _perf_last_compile_type->set_value(counters->compile_type());
2423 _perf_last_compile_size->set_value(method->code_size() +
2424 task->num_inlined_bytecodes());
2425 if (is_osr) {
2426 _perf_osr_compilation->inc(time.ticks());
2427 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2428 } else {
2429 _perf_standard_compilation->inc(time.ticks());
2430 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2431 }
2432 }
2433
2434 if (CITimeEach) {
2435 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2436 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2437 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2438 }
2439
2440 // Collect counts of successful compilations
2441 _sum_nmethod_size += code->total_size();
2442 _sum_nmethod_code_size += code->insts_size();
2443 _total_compile_count++;
2444
2445 if (UsePerfData) {
2446 _perf_sum_nmethod_size->inc( code->total_size());
2447 _perf_sum_nmethod_code_size->inc(code->insts_size());
2448 _perf_total_compile_count->inc();
2449 }
2450
2451 if (is_osr) {
2452 if (UsePerfData) _perf_total_osr_compile_count->inc();
2453 _total_osr_compile_count++;
2454 } else {
2455 if (UsePerfData) _perf_total_standard_compile_count->inc();
2456 _total_standard_compile_count++;
2457 }
2458 }
2459 // set the current method for the thread to null
2460 if (UsePerfData) counters->set_current_method("");
2461 }
2462
2463 const char* CompileBroker::compiler_name(int comp_level) {
2464 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2465 if (comp == NULL) {
2466 return "no compiler";
2467 } else {
2468 return (comp->name());
2469 }
2470 }
2471
2472 #if INCLUDE_JVMCI
2473 void CompileBroker::print_times(AbstractCompiler* comp) {
2474 CompilerStatistics* stats = comp->stats();
2475 if (stats) {
2476 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}",
2477 comp->name(), stats->bytes_per_second(),
2478 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2479 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2480 stats->_nmethods_size, stats->_nmethods_code_size);
2481 } else { // if (!stats)
2482 assert(false, "Compiler statistics object must exist");
2483 }
2484 comp->print_timers();
2485 }
2486 #endif // INCLUDE_JVMCI
2487
2488 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2489 #if INCLUDE_JVMCI
2490 elapsedTimer standard_compilation;
2491 elapsedTimer total_compilation;
2492 elapsedTimer osr_compilation;
2493
2494 int standard_bytes_compiled = 0;
2495 int osr_bytes_compiled = 0;
2496
2497 int standard_compile_count = 0;
2498 int osr_compile_count = 0;
2499 int total_compile_count = 0;
2500
2501 int nmethods_size = 0;
2502 int nmethods_code_size = 0;
2503 bool printedHeader = false;
2504
2505 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2506 AbstractCompiler* comp = _compilers[i];
2507 if (comp != NULL) {
2508 if (per_compiler && aggregate && !printedHeader) {
2509 printedHeader = true;
2510 tty->cr();
2511 tty->print_cr("Individual compiler times (for compiled methods only)");
2512 tty->print_cr("------------------------------------------------");
2513 tty->cr();
2514 }
2515 CompilerStatistics* stats = comp->stats();
2516
2517 if (stats) {
2518 standard_compilation.add(stats->_standard._time);
2519 osr_compilation.add(stats->_osr._time);
2520
2521 standard_bytes_compiled += stats->_standard._bytes;
2522 osr_bytes_compiled += stats->_osr._bytes;
2523
2524 standard_compile_count += stats->_standard._count;
2525 osr_compile_count += stats->_osr._count;
2526
2527 nmethods_size += stats->_nmethods_size;
2528 nmethods_code_size += stats->_nmethods_code_size;
2529 } else { // if (!stats)
2530 assert(false, "Compiler statistics object must exist");
2531 }
2532
2533 if (per_compiler) {
2534 print_times(comp);
2535 }
2536 }
2537 }
2538 total_compile_count = osr_compile_count + standard_compile_count;
2539 total_compilation.add(osr_compilation);
2540 total_compilation.add(standard_compilation);
2541
2542 // In hosted mode, print the JVMCI compiler specific counters manually.
2543 if (!UseJVMCICompiler) {
2544 JVMCICompiler::print_compilation_timers();
2545 }
2546 #else // INCLUDE_JVMCI
2547 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2548 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2549 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2550
2551 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2552 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2553
2554 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2555 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2556 int total_compile_count = CompileBroker::_total_compile_count;
2557
2558 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2559 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2560 #endif // INCLUDE_JVMCI
2561
2562 if (!aggregate) {
2563 return;
2564 }
2565 tty->cr();
2566 tty->print_cr("Accumulated compiler times");
2567 tty->print_cr("----------------------------------------------------------");
2568 //0000000000111111111122222222223333333333444444444455555555556666666666
2569 //0123456789012345678901234567890123456789012345678901234567890123456789
2570 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2571 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2572 standard_compilation.seconds(),
2573 standard_compilation.seconds() / standard_compile_count);
2574 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2575 CompileBroker::_t_bailedout_compilation.seconds(),
2576 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2577 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2578 osr_compilation.seconds(),
2579 osr_compilation.seconds() / osr_compile_count);
2580 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2581 CompileBroker::_t_invalidated_compilation.seconds(),
2582 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2583
2584 AbstractCompiler *comp = compiler(CompLevel_simple);
2585 if (comp != NULL) {
2586 tty->cr();
2587 comp->print_timers();
2588 }
2589 comp = compiler(CompLevel_full_optimization);
2590 if (comp != NULL) {
2591 tty->cr();
2592 comp->print_timers();
2593 }
2594 tty->cr();
2595 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2596 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2597 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2598 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2599 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2600 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2601 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2602 double tcs = total_compilation.seconds();
2603 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2604 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2605 tty->cr();
2606 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2607 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2608 }
2609
2610 // Print general/accumulated JIT information.
2611 void CompileBroker::print_info(outputStream *out) {
2612 if (out == NULL) out = tty;
2613 out->cr();
2614 out->print_cr("======================");
2615 out->print_cr(" General JIT info ");
2616 out->print_cr("======================");
2617 out->cr();
2618 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2619 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2620 out->cr();
2621 out->print_cr("CodeCache overview");
2622 out->print_cr("--------------------------------------------------------");
2623 out->cr();
2624 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2625 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2626 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2627 out->cr();
2628
2629 out->cr();
2630 out->print_cr("CodeCache cleaning overview");
2631 out->print_cr("--------------------------------------------------------");
2632 out->cr();
2633 NMethodSweeper::print(out);
2634 out->print_cr("--------------------------------------------------------");
2635 out->cr();
2636 }
2637
2638 // Note: tty_lock must not be held upon entry to this function.
2639 // Print functions called from herein do "micro-locking" on tty_lock.
2640 // That's a tradeoff which keeps together important blocks of output.
2641 // At the same time, continuous tty_lock hold time is kept in check,
2642 // preventing concurrently printing threads from stalling a long time.
2643 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2644 TimeStamp ts_total;
2645 TimeStamp ts_global;
2646 TimeStamp ts;
2647
2648 bool allFun = !strcmp(function, "all");
2649 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2650 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2651 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2652 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2653 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2654 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2655 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2656 bool discard = !strcmp(function, "discard") || allFun;
2657
2658 if (out == NULL) {
2659 out = tty;
2660 }
2661
2662 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2663 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2664 out->cr();
2665 return;
2666 }
2667
2668 ts_total.update(); // record starting point
2669
2670 if (aggregate) {
2671 print_info(out);
2672 }
2673
2674 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2675 // That prevents another thread from destroying our view on the CodeHeap.
2676 // When we request individual parts of the analysis via the jcmd interface, it is possible
2677 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2678 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2679 // across user interaction.
2680 // Acquire this lock before acquiring the CodeCache_lock.
2681 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2682 // leading to an unnecessarily long hold time of the CodeCache_lock.
2683 ts.update(); // record starting point
2684 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2685 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2686
2687 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2688 // for the entire duration of aggregation and printing. That makes sure
2689 // we see a consistent picture and do not run into issues caused by
2690 // the CodeHeap being altered concurrently.
2691 Monitor* global_lock = allFun ? CodeCache_lock : NULL;
2692 Monitor* function_lock = allFun ? NULL : CodeCache_lock;
2693 ts_global.update(); // record starting point
2694 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag);
2695 if (global_lock != NULL) {
2696 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2697 ts_global.update(); // record starting point
2698 }
2699
2700 if (aggregate) {
2701 ts.update(); // record starting point
2702 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2703 if (function_lock != NULL) {
2704 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2705 }
2706
2707 ts.update(); // record starting point
2708 CodeCache::aggregate(out, granularity);
2709 if (function_lock != NULL) {
2710 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2711 }
2712 }
2713
2714 if (usedSpace) CodeCache::print_usedSpace(out);
2715 if (freeSpace) CodeCache::print_freeSpace(out);
2716 if (methodCount) CodeCache::print_count(out);
2717 if (methodSpace) CodeCache::print_space(out);
2718 if (methodAge) CodeCache::print_age(out);
2719 if (methodNames) {
2720 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2721 // Therefore, request the CodeCache_lock before calling...
2722 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2723 CodeCache::print_names(out);
2724 }
2725 if (discard) CodeCache::discard(out);
2726
2727 if (global_lock != NULL) {
2728 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2729 }
2730 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2731 }