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 "oops/methodData.hpp"
44 #include "oops/method.inline.hpp"
45 #include "oops/oop.inline.hpp"
46 #include "prims/nativeLookup.hpp"
47 #include "prims/whitebox.hpp"
48 #include "runtime/arguments.hpp"
49 #include "runtime/atomic.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/handles.inline.hpp"
52 #include "runtime/init.hpp"
53 #include "runtime/interfaceSupport.inline.hpp"
54 #include "runtime/javaCalls.hpp"
55 #include "runtime/jniHandles.inline.hpp"
56 #include "runtime/os.hpp"
57 #include "runtime/safepointVerifiers.hpp"
58 #include "runtime/sharedRuntime.hpp"
59 #include "runtime/sweeper.hpp"
60 #include "runtime/timerTrace.hpp"
61 #include "runtime/vframe.inline.hpp"
62 #include "utilities/debug.hpp"
63 #include "utilities/dtrace.hpp"
64 #include "utilities/events.hpp"
65 #include "utilities/formatBuffer.hpp"
66 #include "utilities/macros.hpp"
67 #ifdef COMPILER1
68 #include "c1/c1_Compiler.hpp"
69 #endif
70 #if INCLUDE_JVMCI
71 #include "jvmci/jvmciCompiler.hpp"
72 #include "jvmci/jvmciRuntime.hpp"
73 #include "jvmci/jvmciJavaClasses.hpp"
74 #include "runtime/vframe.hpp"
75 #endif
76 #ifdef COMPILER2
77 #include "opto/c2compiler.hpp"
78 #endif
79
80 #ifdef DTRACE_ENABLED
81
82 // Only bother with this argument setup if dtrace is available
83
84 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
85 { \
86 Symbol* klass_name = (method)->klass_name(); \
87 Symbol* name = (method)->name(); \
88 Symbol* signature = (method)->signature(); \
89 HOTSPOT_METHOD_COMPILE_BEGIN( \
90 (char *) comp_name, strlen(comp_name), \
91 (char *) klass_name->bytes(), klass_name->utf8_length(), \
92 (char *) name->bytes(), name->utf8_length(), \
93 (char *) signature->bytes(), signature->utf8_length()); \
94 }
95
96 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
97 { \
98 Symbol* klass_name = (method)->klass_name(); \
99 Symbol* name = (method)->name(); \
100 Symbol* signature = (method)->signature(); \
101 HOTSPOT_METHOD_COMPILE_END( \
102 (char *) comp_name, strlen(comp_name), \
103 (char *) klass_name->bytes(), klass_name->utf8_length(), \
104 (char *) name->bytes(), name->utf8_length(), \
105 (char *) signature->bytes(), signature->utf8_length(), (success)); \
106 }
107
108 #else // ndef DTRACE_ENABLED
109
110 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
111 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
112
113 #endif // ndef DTRACE_ENABLED
114
115 bool CompileBroker::_initialized = false;
116 volatile bool CompileBroker::_should_block = false;
117 volatile int CompileBroker::_print_compilation_warning = 0;
118 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
119
120 // The installed compiler(s)
121 AbstractCompiler* CompileBroker::_compilers[2];
122
123 // The maximum numbers of compiler threads to be determined during startup.
124 int CompileBroker::_c1_count = 0;
125 int CompileBroker::_c2_count = 0;
126
127 // An array of compiler names as Java String objects
128 jobject* CompileBroker::_compiler1_objects = NULL;
129 jobject* CompileBroker::_compiler2_objects = NULL;
130
131 CompileLog** CompileBroker::_compiler1_logs = NULL;
132 CompileLog** CompileBroker::_compiler2_logs = NULL;
133
134 // These counters are used to assign an unique ID to each compilation.
135 volatile jint CompileBroker::_compilation_id = 0;
136 volatile jint CompileBroker::_osr_compilation_id = 0;
137
138 // Performance counters
139 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
140 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
141 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
142
143 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
144 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
145 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
146 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
147 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
148
149 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
150 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
151 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
152 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
153
154 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
155 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
156 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
157 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
158 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
159 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
160 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
161
162 // Timers and counters for generating statistics
163 elapsedTimer CompileBroker::_t_total_compilation;
164 elapsedTimer CompileBroker::_t_osr_compilation;
165 elapsedTimer CompileBroker::_t_standard_compilation;
166 elapsedTimer CompileBroker::_t_invalidated_compilation;
167 elapsedTimer CompileBroker::_t_bailedout_compilation;
168
169 int CompileBroker::_total_bailout_count = 0;
170 int CompileBroker::_total_invalidated_count = 0;
171 int CompileBroker::_total_compile_count = 0;
172 int CompileBroker::_total_osr_compile_count = 0;
173 int CompileBroker::_total_standard_compile_count = 0;
174 int CompileBroker::_total_compiler_stopped_count = 0;
175 int CompileBroker::_total_compiler_restarted_count = 0;
176
177 int CompileBroker::_sum_osr_bytes_compiled = 0;
178 int CompileBroker::_sum_standard_bytes_compiled = 0;
179 int CompileBroker::_sum_nmethod_size = 0;
180 int CompileBroker::_sum_nmethod_code_size = 0;
181
182 long CompileBroker::_peak_compilation_time = 0;
183
184 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
185 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
186
187
188
189 class CompilationLog : public StringEventLog {
190 public:
191 CompilationLog() : StringEventLog("Compilation events") {
192 }
193
194 void log_compile(JavaThread* thread, CompileTask* task) {
195 StringLogMessage lm;
196 stringStream sstr = lm.stream();
197 // msg.time_stamp().update_to(tty->time_stamp().ticks());
198 task->print(&sstr, NULL, true, false);
199 log(thread, "%s", (const char*)lm);
200 }
201
202 void log_nmethod(JavaThread* thread, nmethod* nm) {
203 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
204 nm->compile_id(), nm->is_osr_method() ? "%" : "",
205 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
206 }
207
208 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
209 StringLogMessage lm;
210 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
211 if (retry_message != NULL) {
212 lm.append(" (%s)", retry_message);
213 }
214 lm.print("\n");
215 log(thread, "%s", (const char*)lm);
216 }
217
218 void log_metaspace_failure(const char* reason) {
219 ResourceMark rm;
220 StringLogMessage lm;
221 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
222 lm.print("\n");
223 log(JavaThread::current(), "%s", (const char*)lm);
224 }
225 };
226
227 static CompilationLog* _compilation_log = NULL;
228
229 bool compileBroker_init() {
230 if (LogEvents) {
231 _compilation_log = new CompilationLog();
232 }
233
234 // init directives stack, adding default directive
235 DirectivesStack::init();
236
237 if (DirectivesParser::has_file()) {
238 return DirectivesParser::parse_from_flag();
239 } else if (CompilerDirectivesPrint) {
240 // Print default directive even when no other was added
241 DirectivesStack::print(tty);
242 }
243
244 return true;
245 }
246
247 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
248 CompilerThread* thread = CompilerThread::current();
249 thread->set_task(task);
250 #if INCLUDE_JVMCI
251 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
252 task->set_jvmci_compiler_thread(thread);
253 }
254 #endif
255 CompileLog* log = thread->log();
256 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
257 }
258
259 CompileTaskWrapper::~CompileTaskWrapper() {
260 CompilerThread* thread = CompilerThread::current();
261 CompileTask* task = thread->task();
262 CompileLog* log = thread->log();
263 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
264 thread->set_task(NULL);
265 task->set_code_handle(NULL);
266 thread->set_env(NULL);
267 if (task->is_blocking()) {
268 bool free_task = false;
269 {
270 MutexLocker notifier(task->lock(), thread);
271 task->mark_complete();
272 #if INCLUDE_JVMCI
273 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
274 if (!task->has_waiter()) {
275 // The waiting thread timed out and thus did not free the task.
276 free_task = true;
277 }
278 task->set_jvmci_compiler_thread(NULL);
279 }
280 #endif
281 if (!free_task) {
282 // Notify the waiting thread that the compilation has completed
283 // so that it can free the task.
284 task->lock()->notify_all();
285 }
286 }
287 if (free_task) {
288 // The task can only be freed once the task lock is released.
289 CompileTask::free(task);
290 }
291 } else {
292 task->mark_complete();
293
294 // By convention, the compiling thread is responsible for
295 // recycling a non-blocking CompileTask.
296 CompileTask::free(task);
297 }
298 }
299
300 /**
301 * Check if a CompilerThread can be removed and update count if requested.
302 */
303 static bool can_remove(CompilerThread *ct, bool do_it) {
304 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
305 if (!ReduceNumberOfCompilerThreads) return false;
306
307 AbstractCompiler *compiler = ct->compiler();
308 int compiler_count = compiler->num_compiler_threads();
309 bool c1 = compiler->is_c1();
310
311 // Keep at least 1 compiler thread of each type.
312 if (compiler_count < 2) return false;
313
314 // Keep thread alive for at least some time.
315 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
316
317 // We only allow the last compiler thread of each type to get removed.
318 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
319 : CompileBroker::compiler2_object(compiler_count - 1);
320 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
321 if (do_it) {
322 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
323 compiler->set_num_compiler_threads(compiler_count - 1);
324 }
325 return true;
326 }
327 return false;
328 }
329
330 /**
331 * Add a CompileTask to a CompileQueue.
332 */
333 void CompileQueue::add(CompileTask* task) {
334 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
335
336 task->set_next(NULL);
337 task->set_prev(NULL);
338
339 if (_last == NULL) {
340 // The compile queue is empty.
341 assert(_first == NULL, "queue is empty");
342 _first = task;
343 _last = task;
344 } else {
345 // Append the task to the queue.
346 assert(_last->next() == NULL, "not last");
347 _last->set_next(task);
348 task->set_prev(_last);
349 _last = task;
350 }
351 ++_size;
352
353 // Mark the method as being in the compile queue.
354 task->method()->set_queued_for_compilation();
355
356 if (CIPrintCompileQueue) {
357 print_tty();
358 }
359
360 if (LogCompilation && xtty != NULL) {
361 task->log_task_queued();
362 }
363
364 // Notify CompilerThreads that a task is available.
365 MethodCompileQueue_lock->notify_all();
366 }
367
368 /**
369 * Empties compilation queue by putting all compilation tasks onto
370 * a freelist. Furthermore, the method wakes up all threads that are
371 * waiting on a compilation task to finish. This can happen if background
372 * compilation is disabled.
373 */
374 void CompileQueue::free_all() {
375 MutexLocker mu(MethodCompileQueue_lock);
376 CompileTask* next = _first;
377
378 // Iterate over all tasks in the compile queue
379 while (next != NULL) {
380 CompileTask* current = next;
381 next = current->next();
382 {
383 // Wake up thread that blocks on the compile task.
384 MutexLocker ct_lock(current->lock());
385 current->lock()->notify();
386 }
387 // Put the task back on the freelist.
388 CompileTask::free(current);
389 }
390 _first = NULL;
391
392 // Wake up all threads that block on the queue.
393 MethodCompileQueue_lock->notify_all();
394 }
395
396 /**
397 * Get the next CompileTask from a CompileQueue
398 */
399 CompileTask* CompileQueue::get() {
400 // save methods from RedefineClasses across safepoint
401 // across MethodCompileQueue_lock below.
402 methodHandle save_method;
403 methodHandle save_hot_method;
404
405 MutexLocker locker(MethodCompileQueue_lock);
406 // If _first is NULL we have no more compile jobs. There are two reasons for
407 // having no compile jobs: First, we compiled everything we wanted. Second,
408 // we ran out of code cache so compilation has been disabled. In the latter
409 // case we perform code cache sweeps to free memory such that we can re-enable
410 // compilation.
411 while (_first == NULL) {
412 // Exit loop if compilation is disabled forever
413 if (CompileBroker::is_compilation_disabled_forever()) {
414 return NULL;
415 }
416
417 // If there are no compilation tasks and we can compile new jobs
418 // (i.e., there is enough free space in the code cache) there is
419 // no need to invoke the sweeper. As a result, the hotness of methods
420 // remains unchanged. This behavior is desired, since we want to keep
421 // the stable state, i.e., we do not want to evict methods from the
422 // code cache if it is unnecessary.
423 // We need a timed wait here, since compiler threads can exit if compilation
424 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
425 // is not critical and we do not want idle compiler threads to wake up too often.
426 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
427
428 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
429 // Still nothing to compile. Give caller a chance to stop this thread.
430 if (can_remove(CompilerThread::current(), false)) return NULL;
431 }
432 }
433
434 if (CompileBroker::is_compilation_disabled_forever()) {
435 return NULL;
436 }
437
438 CompileTask* task;
439 {
440 NoSafepointVerifier nsv;
441 task = CompilationPolicy::policy()->select_task(this);
442 if (task != NULL) {
443 task = task->select_for_compilation();
444 }
445 }
446
447 if (task != NULL) {
448 // Save method pointers across unlock safepoint. The task is removed from
449 // the compilation queue, which is walked during RedefineClasses.
450 save_method = methodHandle(task->method());
451 save_hot_method = methodHandle(task->hot_method());
452
453 remove(task);
454 purge_stale_tasks(); // may temporarily release MCQ lock
455 }
456 return task;
457 }
458
459 // Clean & deallocate stale compile tasks.
460 // Temporarily releases MethodCompileQueue lock.
461 void CompileQueue::purge_stale_tasks() {
462 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
463 if (_first_stale != NULL) {
464 // Stale tasks are purged when MCQ lock is released,
465 // but _first_stale updates are protected by MCQ lock.
466 // Once task processing starts and MCQ lock is released,
467 // other compiler threads can reuse _first_stale.
468 CompileTask* head = _first_stale;
469 _first_stale = NULL;
470 {
471 MutexUnlocker ul(MethodCompileQueue_lock);
472 for (CompileTask* task = head; task != NULL; ) {
473 CompileTask* next_task = task->next();
474 CompileTaskWrapper ctw(task); // Frees the task
475 task->set_failure_reason("stale task");
476 task = next_task;
477 }
478 }
479 }
480 }
481
482 void CompileQueue::remove(CompileTask* task) {
483 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
484 if (task->prev() != NULL) {
485 task->prev()->set_next(task->next());
486 } else {
487 // max is the first element
488 assert(task == _first, "Sanity");
489 _first = task->next();
490 }
491
492 if (task->next() != NULL) {
493 task->next()->set_prev(task->prev());
494 } else {
495 // max is the last element
496 assert(task == _last, "Sanity");
497 _last = task->prev();
498 }
499 --_size;
500 }
501
502 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
503 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
504 remove(task);
505
506 // Enqueue the task for reclamation (should be done outside MCQ lock)
507 task->set_next(_first_stale);
508 task->set_prev(NULL);
509 _first_stale = task;
510 }
511
512 // methods in the compile queue need to be marked as used on the stack
513 // so that they don't get reclaimed by Redefine Classes
514 void CompileQueue::mark_on_stack() {
515 CompileTask* task = _first;
516 while (task != NULL) {
517 task->mark_on_stack();
518 task = task->next();
519 }
520 }
521
522
523 CompileQueue* CompileBroker::compile_queue(int comp_level) {
524 if (is_c2_compile(comp_level)) return _c2_compile_queue;
525 if (is_c1_compile(comp_level)) return _c1_compile_queue;
526 return NULL;
527 }
528
529 void CompileBroker::print_compile_queues(outputStream* st) {
530 st->print_cr("Current compiles: ");
531
532 char buf[2000];
533 int buflen = sizeof(buf);
534 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
535
536 st->cr();
537 if (_c1_compile_queue != NULL) {
538 _c1_compile_queue->print(st);
539 }
540 if (_c2_compile_queue != NULL) {
541 _c2_compile_queue->print(st);
542 }
543 }
544
545 void CompileQueue::print(outputStream* st) {
546 assert_locked_or_safepoint(MethodCompileQueue_lock);
547 st->print_cr("%s:", name());
548 CompileTask* task = _first;
549 if (task == NULL) {
550 st->print_cr("Empty");
551 } else {
552 while (task != NULL) {
553 task->print(st, NULL, true, true);
554 task = task->next();
555 }
556 }
557 st->cr();
558 }
559
560 void CompileQueue::print_tty() {
561 ttyLocker ttyl;
562 print(tty);
563 }
564
565 CompilerCounters::CompilerCounters() {
566 _current_method[0] = '\0';
567 _compile_type = CompileBroker::no_compile;
568 }
569
570 // ------------------------------------------------------------------
571 // CompileBroker::compilation_init
572 //
573 // Initialize the Compilation object
574 void CompileBroker::compilation_init_phase1(TRAPS) {
575 // No need to initialize compilation system if we do not use it.
576 if (!UseCompiler) {
577 return;
578 }
579 // Set the interface to the current compiler(s).
580 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
581 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
582
583 #if INCLUDE_JVMCI
584 if (EnableJVMCI) {
585 // This is creating a JVMCICompiler singleton.
586 JVMCICompiler* jvmci = new JVMCICompiler();
587
588 if (UseJVMCICompiler) {
589 _compilers[1] = jvmci;
590 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
591 if (BootstrapJVMCI) {
592 // JVMCI will bootstrap so give it more threads
593 _c2_count = MIN2(32, os::active_processor_count());
594 }
595 } else {
596 _c2_count = JVMCIThreads;
597 }
598 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
599 } else {
600 _c1_count = JVMCIHostThreads;
601 }
602 }
603 }
604 #endif // INCLUDE_JVMCI
605
606 #ifdef COMPILER1
607 if (_c1_count > 0) {
608 _compilers[0] = new Compiler();
609 }
610 #endif // COMPILER1
611
612 #ifdef COMPILER2
613 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
614 if (_c2_count > 0) {
615 _compilers[1] = new C2Compiler();
616 }
617 }
618 #endif // COMPILER2
619
620 // Start the compiler thread(s) and the sweeper thread
621 init_compiler_sweeper_threads();
622 // totalTime performance counter is always created as it is required
623 // by the implementation of java.lang.management.CompilationMBean.
624 {
625 EXCEPTION_MARK;
626 _perf_total_compilation =
627 PerfDataManager::create_counter(JAVA_CI, "totalTime",
628 PerfData::U_Ticks, CHECK);
629 }
630
631 if (UsePerfData) {
632
633 EXCEPTION_MARK;
634
635 // create the jvmstat performance counters
636 _perf_osr_compilation =
637 PerfDataManager::create_counter(SUN_CI, "osrTime",
638 PerfData::U_Ticks, CHECK);
639
640 _perf_standard_compilation =
641 PerfDataManager::create_counter(SUN_CI, "standardTime",
642 PerfData::U_Ticks, CHECK);
643
644 _perf_total_bailout_count =
645 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
646 PerfData::U_Events, CHECK);
647
648 _perf_total_invalidated_count =
649 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
650 PerfData::U_Events, CHECK);
651
652 _perf_total_compile_count =
653 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
654 PerfData::U_Events, CHECK);
655 _perf_total_osr_compile_count =
656 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
657 PerfData::U_Events, CHECK);
658
659 _perf_total_standard_compile_count =
660 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
661 PerfData::U_Events, CHECK);
662
663 _perf_sum_osr_bytes_compiled =
664 PerfDataManager::create_counter(SUN_CI, "osrBytes",
665 PerfData::U_Bytes, CHECK);
666
667 _perf_sum_standard_bytes_compiled =
668 PerfDataManager::create_counter(SUN_CI, "standardBytes",
669 PerfData::U_Bytes, CHECK);
670
671 _perf_sum_nmethod_size =
672 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
673 PerfData::U_Bytes, CHECK);
674
675 _perf_sum_nmethod_code_size =
676 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
677 PerfData::U_Bytes, CHECK);
678
679 _perf_last_method =
680 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
681 CompilerCounters::cmname_buffer_length,
682 "", CHECK);
683
684 _perf_last_failed_method =
685 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
686 CompilerCounters::cmname_buffer_length,
687 "", CHECK);
688
689 _perf_last_invalidated_method =
690 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
691 CompilerCounters::cmname_buffer_length,
692 "", CHECK);
693
694 _perf_last_compile_type =
695 PerfDataManager::create_variable(SUN_CI, "lastType",
696 PerfData::U_None,
697 (jlong)CompileBroker::no_compile,
698 CHECK);
699
700 _perf_last_compile_size =
701 PerfDataManager::create_variable(SUN_CI, "lastSize",
702 PerfData::U_Bytes,
703 (jlong)CompileBroker::no_compile,
704 CHECK);
705
706
707 _perf_last_failed_type =
708 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
709 PerfData::U_None,
710 (jlong)CompileBroker::no_compile,
711 CHECK);
712
713 _perf_last_invalidated_type =
714 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
715 PerfData::U_None,
716 (jlong)CompileBroker::no_compile,
717 CHECK);
718 }
719 }
720
721 // Completes compiler initialization. Compilation requests submitted
722 // prior to this will be silently ignored.
723 void CompileBroker::compilation_init_phase2() {
724 _initialized = true;
725 }
726
727 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
728 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
729 Handle thread_group(THREAD, Universe::system_thread_group());
730 return JavaCalls::construct_new_instance(
731 SystemDictionary::Thread_klass(),
732 vmSymbols::threadgroup_string_void_signature(),
733 thread_group,
734 string,
735 CHECK_NH);
736 }
737
738
739 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) {
740 JavaThread* thread = NULL;
741 {
742 MutexLocker mu(Threads_lock, THREAD);
743 if (comp != NULL) {
744 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
745 CompilerCounters* counters = new CompilerCounters();
746 thread = new CompilerThread(queue, counters);
747 }
748 } else {
749 thread = new CodeCacheSweeperThread();
750 }
751 // At this point the new CompilerThread data-races with this startup
752 // thread (which I believe is the primoridal thread and NOT the VM
753 // thread). This means Java bytecodes being executed at startup can
754 // queue compile jobs which will run at whatever default priority the
755 // newly created CompilerThread runs at.
756
757
758 // At this point it may be possible that no osthread was created for the
759 // JavaThread due to lack of memory. We would have to throw an exception
760 // in that case. However, since this must work and we do not allow
761 // exceptions anyway, check and abort if this fails. But first release the
762 // lock.
763
764 if (thread != NULL && thread->osthread() != NULL) {
765
766 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
767
768 // Note that this only sets the JavaThread _priority field, which by
769 // definition is limited to Java priorities and not OS priorities.
770 // The os-priority is set in the CompilerThread startup code itself
771
772 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
773
774 // Note that we cannot call os::set_priority because it expects Java
775 // priorities and we are *explicitly* using OS priorities so that it's
776 // possible to set the compiler thread priority higher than any Java
777 // thread.
778
779 int native_prio = CompilerThreadPriority;
780 if (native_prio == -1) {
781 if (UseCriticalCompilerThreadPriority) {
782 native_prio = os::java_to_os_priority[CriticalPriority];
783 } else {
784 native_prio = os::java_to_os_priority[NearMaxPriority];
785 }
786 }
787 os::set_native_priority(thread, native_prio);
788
789 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
790
791 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
792 if (comp != NULL) {
793 thread->as_CompilerThread()->set_compiler(comp);
794 }
795 Threads::add(thread);
796 Thread::start(thread);
797 }
798 }
799
800 // First release lock before aborting VM.
801 if (thread == NULL || thread->osthread() == NULL) {
802 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
803 if (thread != NULL) {
804 thread->smr_delete();
805 }
806 return NULL;
807 }
808 vm_exit_during_initialization("java.lang.OutOfMemoryError",
809 os::native_thread_creation_failed_msg());
810 }
811
812 // Let go of Threads_lock before yielding
813 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
814
815 return thread;
816 }
817
818
819 void CompileBroker::init_compiler_sweeper_threads() {
820 EXCEPTION_MARK;
821 #if !defined(ZERO)
822 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
823 #endif // !ZERO
824 // Initialize the compilation queue
825 if (_c2_count > 0) {
826 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
827 _c2_compile_queue = new CompileQueue(name);
828 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
829 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
830 }
831 if (_c1_count > 0) {
832 _c1_compile_queue = new CompileQueue("C1 compile queue");
833 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
834 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
835 }
836
837 char name_buffer[256];
838
839 for (int i = 0; i < _c2_count; i++) {
840 // Create a name for our thread.
841 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
842 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
843 jobject thread_handle = JNIHandles::make_global(thread_oop);
844 _compiler2_objects[i] = thread_handle;
845 _compiler2_logs[i] = NULL;
846
847 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
848 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK);
849 assert(ct != NULL, "should have been handled for initial thread");
850 _compilers[1]->set_num_compiler_threads(i + 1);
851 if (TraceCompilerThreads) {
852 ResourceMark rm;
853 MutexLocker mu(Threads_lock);
854 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
855 }
856 }
857 }
858
859 for (int i = 0; i < _c1_count; i++) {
860 // Create a name for our thread.
861 sprintf(name_buffer, "C1 CompilerThread%d", i);
862 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
863 jobject thread_handle = JNIHandles::make_global(thread_oop);
864 _compiler1_objects[i] = thread_handle;
865 _compiler1_logs[i] = NULL;
866
867 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
868 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK);
869 assert(ct != NULL, "should have been handled for initial thread");
870 _compilers[0]->set_num_compiler_threads(i + 1);
871 if (TraceCompilerThreads) {
872 ResourceMark rm;
873 MutexLocker mu(Threads_lock);
874 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
875 }
876 }
877 }
878
879 if (UsePerfData) {
880 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
881 }
882
883 if (MethodFlushing) {
884 // Initialize the sweeper thread
885 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
886 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
887 make_thread(thread_handle, NULL, NULL, CHECK);
888 }
889 }
890
891 void CompileBroker::possibly_add_compiler_threads() {
892 EXCEPTION_MARK;
893
894 julong available_memory = os::available_memory();
895 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
896 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
897 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
898
899 // Only do attempt to start additional threads if the lock is free.
900 if (!CompileThread_lock->try_lock()) return;
901
902 if (_c2_compile_queue != NULL) {
903 int old_c2_count = _compilers[1]->num_compiler_threads();
904 int new_c2_count = MIN4(_c2_count,
905 _c2_compile_queue->size() / 2,
906 (int)(available_memory / (200*M)),
907 (int)(available_cc_np / (128*K)));
908
909 for (int i = old_c2_count; i < new_c2_count; i++) {
910 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK);
911 if (ct == NULL) break;
912 _compilers[1]->set_num_compiler_threads(i + 1);
913 if (TraceCompilerThreads) {
914 ResourceMark rm;
915 MutexLocker mu(Threads_lock);
916 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
917 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
918 }
919 }
920 }
921
922 if (_c1_compile_queue != NULL) {
923 int old_c1_count = _compilers[0]->num_compiler_threads();
924 int new_c1_count = MIN4(_c1_count,
925 _c1_compile_queue->size() / 4,
926 (int)(available_memory / (100*M)),
927 (int)(available_cc_p / (128*K)));
928
929 for (int i = old_c1_count; i < new_c1_count; i++) {
930 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK);
931 if (ct == NULL) break;
932 _compilers[0]->set_num_compiler_threads(i + 1);
933 if (TraceCompilerThreads) {
934 ResourceMark rm;
935 MutexLocker mu(Threads_lock);
936 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
937 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
938 }
939 }
940 }
941
942 CompileThread_lock->unlock();
943 }
944
945
946 /**
947 * Set the methods on the stack as on_stack so that redefine classes doesn't
948 * reclaim them. This method is executed at a safepoint.
949 */
950 void CompileBroker::mark_on_stack() {
951 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
952 // Since we are at a safepoint, we do not need a lock to access
953 // the compile queues.
954 if (_c2_compile_queue != NULL) {
955 _c2_compile_queue->mark_on_stack();
956 }
957 if (_c1_compile_queue != NULL) {
958 _c1_compile_queue->mark_on_stack();
959 }
960 }
961
962 // ------------------------------------------------------------------
963 // CompileBroker::compile_method
964 //
965 // Request compilation of a method.
966 void CompileBroker::compile_method_base(const methodHandle& method,
967 int osr_bci,
968 int comp_level,
969 const methodHandle& hot_method,
970 int hot_count,
971 CompileTask::CompileReason compile_reason,
972 bool blocking,
973 Thread* thread) {
974 guarantee(!method->is_abstract(), "cannot compile abstract methods");
975 assert(method->method_holder()->is_instance_klass(),
976 "sanity check");
977 assert(!method->method_holder()->is_not_initialized(),
978 "method holder must be initialized");
979 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
980
981 if (CIPrintRequests) {
982 tty->print("request: ");
983 method->print_short_name(tty);
984 if (osr_bci != InvocationEntryBci) {
985 tty->print(" osr_bci: %d", osr_bci);
986 }
987 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
988 if (!hot_method.is_null()) {
989 tty->print(" hot: ");
990 if (hot_method() != method()) {
991 hot_method->print_short_name(tty);
992 } else {
993 tty->print("yes");
994 }
995 }
996 tty->cr();
997 }
998
999 // A request has been made for compilation. Before we do any
1000 // real work, check to see if the method has been compiled
1001 // in the meantime with a definitive result.
1002 if (compilation_is_complete(method, osr_bci, comp_level)) {
1003 return;
1004 }
1005
1006 #ifndef PRODUCT
1007 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1008 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1009 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1010 return;
1011 }
1012 }
1013 #endif
1014
1015 // If this method is already in the compile queue, then
1016 // we do not block the current thread.
1017 if (compilation_is_in_queue(method)) {
1018 // We may want to decay our counter a bit here to prevent
1019 // multiple denied requests for compilation. This is an
1020 // open compilation policy issue. Note: The other possibility,
1021 // in the case that this is a blocking compile request, is to have
1022 // all subsequent blocking requesters wait for completion of
1023 // ongoing compiles. Note that in this case we'll need a protocol
1024 // for freeing the associated compile tasks. [Or we could have
1025 // a single static monitor on which all these waiters sleep.]
1026 return;
1027 }
1028
1029 if (TieredCompilation) {
1030 // Tiered policy requires MethodCounters to exist before adding a method to
1031 // the queue. Create if we don't have them yet.
1032 method->get_method_counters(thread);
1033 }
1034
1035 // Outputs from the following MutexLocker block:
1036 CompileTask* task = NULL;
1037 CompileQueue* queue = compile_queue(comp_level);
1038
1039 // Acquire our lock.
1040 {
1041 MutexLocker locker(MethodCompileQueue_lock, thread);
1042
1043 // Make sure the method has not slipped into the queues since
1044 // last we checked; note that those checks were "fast bail-outs".
1045 // Here we need to be more careful, see 14012000 below.
1046 if (compilation_is_in_queue(method)) {
1047 return;
1048 }
1049
1050 // We need to check again to see if the compilation has
1051 // completed. A previous compilation may have registered
1052 // some result.
1053 if (compilation_is_complete(method, osr_bci, comp_level)) {
1054 return;
1055 }
1056
1057 // We now know that this compilation is not pending, complete,
1058 // or prohibited. Assign a compile_id to this compilation
1059 // and check to see if it is in our [Start..Stop) range.
1060 int compile_id = assign_compile_id(method, osr_bci);
1061 if (compile_id == 0) {
1062 // The compilation falls outside the allowed range.
1063 return;
1064 }
1065
1066 #if INCLUDE_JVMCI
1067 if (UseJVMCICompiler) {
1068 if (blocking) {
1069 // Don't allow blocking compiles for requests triggered by JVMCI.
1070 if (thread->is_Compiler_thread()) {
1071 blocking = false;
1072 }
1073
1074 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1075 vframeStream vfst((JavaThread*) thread);
1076 for (; !vfst.at_end(); vfst.next()) {
1077 if (vfst.method()->is_class_initializer() ||
1078 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1079 vfst.method()->name() == vmSymbols::loadClass_name())) {
1080 blocking = false;
1081 break;
1082 }
1083 }
1084
1085 // Don't allow blocking compilation requests to JVMCI
1086 // if JVMCI itself is not yet initialized
1087 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_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 (JVMCIRuntime::shutdown_called()) {
1095 blocking = false;
1096 }
1097 }
1098 }
1099 #endif // INCLUDE_JVMCI
1100
1101 // We will enter the compilation in the queue.
1102 // 14012000: Note that this sets the queued_for_compile bits in
1103 // the target method. We can now reason that a method cannot be
1104 // queued for compilation more than once, as follows:
1105 // Before a thread queues a task for compilation, it first acquires
1106 // the compile queue lock, then checks if the method's queued bits
1107 // are set or it has already been compiled. Thus there can not be two
1108 // instances of a compilation task for the same method on the
1109 // compilation queue. Consider now the case where the compilation
1110 // thread has already removed a task for that method from the queue
1111 // and is in the midst of compiling it. In this case, the
1112 // queued_for_compile bits must be set in the method (and these
1113 // will be visible to the current thread, since the bits were set
1114 // under protection of the compile queue lock, which we hold now.
1115 // When the compilation completes, the compiler thread first sets
1116 // the compilation result and then clears the queued_for_compile
1117 // bits. Neither of these actions are protected by a barrier (or done
1118 // under the protection of a lock), so the only guarantee we have
1119 // (on machines with TSO (Total Store Order)) is that these values
1120 // will update in that order. As a result, the only combinations of
1121 // these bits that the current thread will see are, in temporal order:
1122 // <RESULT, QUEUE> :
1123 // <0, 1> : in compile queue, but not yet compiled
1124 // <1, 1> : compiled but queue bit not cleared
1125 // <1, 0> : compiled and queue bit cleared
1126 // Because we first check the queue bits then check the result bits,
1127 // we are assured that we cannot introduce a duplicate task.
1128 // Note that if we did the tests in the reverse order (i.e. check
1129 // result then check queued bit), we could get the result bit before
1130 // the compilation completed, and the queue bit after the compilation
1131 // completed, and end up introducing a "duplicate" (redundant) task.
1132 // In that case, the compiler thread should first check if a method
1133 // has already been compiled before trying to compile it.
1134 // NOTE: in the event that there are multiple compiler threads and
1135 // there is de-optimization/recompilation, things will get hairy,
1136 // and in that case it's best to protect both the testing (here) of
1137 // these bits, and their updating (here and elsewhere) under a
1138 // common lock.
1139 task = create_compile_task(queue,
1140 compile_id, method,
1141 osr_bci, comp_level,
1142 hot_method, hot_count, compile_reason,
1143 blocking);
1144 }
1145
1146 if (blocking) {
1147 wait_for_completion(task);
1148 }
1149 }
1150
1151 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1152 int comp_level,
1153 const methodHandle& hot_method, int hot_count,
1154 CompileTask::CompileReason compile_reason,
1155 Thread* THREAD) {
1156 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1157 if (!_initialized || comp_level == CompLevel_none) {
1158 return NULL;
1159 }
1160
1161 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1162 assert(comp != NULL, "Ensure we have a compiler");
1163
1164 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1165 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1166 DirectivesStack::release(directive);
1167 return nm;
1168 }
1169
1170 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1171 int comp_level,
1172 const methodHandle& hot_method, int hot_count,
1173 CompileTask::CompileReason compile_reason,
1174 DirectiveSet* directive,
1175 Thread* THREAD) {
1176
1177 // make sure arguments make sense
1178 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1179 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1180 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1181 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1182 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1183 // allow any levels for WhiteBox
1184 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1185 // return quickly if possible
1186
1187 // lock, make sure that the compilation
1188 // isn't prohibited in a straightforward way.
1189 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1190 if (comp == NULL || !comp->can_compile_method(method) ||
1191 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1192 return NULL;
1193 }
1194
1195 #if INCLUDE_JVMCI
1196 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1197 return NULL;
1198 }
1199 #endif
1200
1201 if (osr_bci == InvocationEntryBci) {
1202 // standard compilation
1203 CompiledMethod* method_code = method->code();
1204 if (method_code != NULL && method_code->is_nmethod()) {
1205 if (compilation_is_complete(method, osr_bci, comp_level)) {
1206 return (nmethod*) method_code;
1207 }
1208 }
1209 if (method->is_not_compilable(comp_level)) {
1210 return NULL;
1211 }
1212 } else {
1213 // osr compilation
1214 #ifndef TIERED
1215 // seems like an assert of dubious value
1216 assert(comp_level == CompLevel_highest_tier,
1217 "all OSR compiles are assumed to be at a single compilation level");
1218 #endif // TIERED
1219 // We accept a higher level osr method
1220 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1221 if (nm != NULL) return nm;
1222 if (method->is_not_osr_compilable(comp_level)) return NULL;
1223 }
1224
1225 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1226 // some prerequisites that are compiler specific
1227 if (comp->is_c2()) {
1228 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1229 // Resolve all classes seen in the signature of the method
1230 // we are compiling.
1231 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1232 }
1233
1234 // If the method is native, do the lookup in the thread requesting
1235 // the compilation. Native lookups can load code, which is not
1236 // permitted during compilation.
1237 //
1238 // Note: A native method implies non-osr compilation which is
1239 // checked with an assertion at the entry of this method.
1240 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1241 bool in_base_library;
1242 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1243 if (HAS_PENDING_EXCEPTION) {
1244 // In case of an exception looking up the method, we just forget
1245 // about it. The interpreter will kick-in and throw the exception.
1246 method->set_not_compilable(); // implies is_not_osr_compilable()
1247 CLEAR_PENDING_EXCEPTION;
1248 return NULL;
1249 }
1250 assert(method->has_native_function(), "must have native code by now");
1251 }
1252
1253 // RedefineClasses() has replaced this method; just return
1254 if (method->is_old()) {
1255 return NULL;
1256 }
1257
1258 // JVMTI -- post_compile_event requires jmethod_id() that may require
1259 // a lock the compiling thread can not acquire. Prefetch it here.
1260 if (JvmtiExport::should_post_compiled_method_load()) {
1261 method->jmethod_id();
1262 }
1263
1264 // do the compilation
1265 if (method->is_native()) {
1266 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1267 // The following native methods:
1268 //
1269 // java.lang.Float.intBitsToFloat
1270 // java.lang.Float.floatToRawIntBits
1271 // java.lang.Double.longBitsToDouble
1272 // java.lang.Double.doubleToRawLongBits
1273 //
1274 // are called through the interpreter even if interpreter native stubs
1275 // are not preferred (i.e., calling through adapter handlers is preferred).
1276 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1277 // if the version of the methods from the native libraries is called.
1278 // As the interpreter and the C2-intrinsified version of the methods preserves
1279 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1280 if ((UseSSE >= 1 &&
1281 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1282 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1283 (UseSSE >= 2 &&
1284 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1285 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1286 return NULL;
1287 }
1288
1289 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1290 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1291 //
1292 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1293 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1294 AdapterHandlerLibrary::create_native_wrapper(method);
1295 } else {
1296 return NULL;
1297 }
1298 } else {
1299 // If the compiler is shut off due to code cache getting full
1300 // fail out now so blocking compiles dont hang the java thread
1301 if (!should_compile_new_jobs()) {
1302 CompilationPolicy::policy()->delay_compilation(method());
1303 return NULL;
1304 }
1305 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1306 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1307 }
1308
1309 // return requested nmethod
1310 // We accept a higher level osr method
1311 if (osr_bci == InvocationEntryBci) {
1312 CompiledMethod* code = method->code();
1313 if (code == NULL) {
1314 return (nmethod*) code;
1315 } else {
1316 return code->as_nmethod_or_null();
1317 }
1318 }
1319 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1320 }
1321
1322
1323 // ------------------------------------------------------------------
1324 // CompileBroker::compilation_is_complete
1325 //
1326 // See if compilation of this method is already complete.
1327 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1328 int osr_bci,
1329 int comp_level) {
1330 bool is_osr = (osr_bci != standard_entry_bci);
1331 if (is_osr) {
1332 if (method->is_not_osr_compilable(comp_level)) {
1333 return true;
1334 } else {
1335 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1336 return (result != NULL);
1337 }
1338 } else {
1339 if (method->is_not_compilable(comp_level)) {
1340 return true;
1341 } else {
1342 CompiledMethod* result = method->code();
1343 if (result == NULL) return false;
1344 return comp_level == result->comp_level();
1345 }
1346 }
1347 }
1348
1349
1350 /**
1351 * See if this compilation is already requested.
1352 *
1353 * Implementation note: there is only a single "is in queue" bit
1354 * for each method. This means that the check below is overly
1355 * conservative in the sense that an osr compilation in the queue
1356 * will block a normal compilation from entering the queue (and vice
1357 * versa). This can be remedied by a full queue search to disambiguate
1358 * cases. If it is deemed profitable, this may be done.
1359 */
1360 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1361 return method->queued_for_compilation();
1362 }
1363
1364 // ------------------------------------------------------------------
1365 // CompileBroker::compilation_is_prohibited
1366 //
1367 // See if this compilation is not allowed.
1368 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1369 bool is_native = method->is_native();
1370 // Some compilers may not support the compilation of natives.
1371 AbstractCompiler *comp = compiler(comp_level);
1372 if (is_native &&
1373 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1374 method->set_not_compilable_quietly(comp_level);
1375 return true;
1376 }
1377
1378 bool is_osr = (osr_bci != standard_entry_bci);
1379 // Some compilers may not support on stack replacement.
1380 if (is_osr &&
1381 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1382 method->set_not_osr_compilable(comp_level);
1383 return true;
1384 }
1385
1386 // The method may be explicitly excluded by the user.
1387 double scale;
1388 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1389 bool quietly = CompilerOracle::should_exclude_quietly();
1390 if (PrintCompilation && !quietly) {
1391 // This does not happen quietly...
1392 ResourceMark rm;
1393 tty->print("### Excluding %s:%s",
1394 method->is_native() ? "generation of native wrapper" : "compile",
1395 (method->is_static() ? " static" : ""));
1396 method->print_short_name(tty);
1397 tty->cr();
1398 }
1399 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1400 }
1401
1402 return false;
1403 }
1404
1405 /**
1406 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1407 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1408 * The function also allows to generate separate compilation IDs for OSR compilations.
1409 */
1410 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1411 #ifdef ASSERT
1412 bool is_osr = (osr_bci != standard_entry_bci);
1413 int id;
1414 if (method->is_native()) {
1415 assert(!is_osr, "can't be osr");
1416 // Adapters, native wrappers and method handle intrinsics
1417 // should be generated always.
1418 return Atomic::add(1, &_compilation_id);
1419 } else if (CICountOSR && is_osr) {
1420 id = Atomic::add(1, &_osr_compilation_id);
1421 if (CIStartOSR <= id && id < CIStopOSR) {
1422 return id;
1423 }
1424 } else {
1425 id = Atomic::add(1, &_compilation_id);
1426 if (CIStart <= id && id < CIStop) {
1427 return id;
1428 }
1429 }
1430
1431 // Method was not in the appropriate compilation range.
1432 method->set_not_compilable_quietly();
1433 return 0;
1434 #else
1435 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1436 // only _compilation_id is incremented.
1437 return Atomic::add(1, &_compilation_id);
1438 #endif
1439 }
1440
1441 // ------------------------------------------------------------------
1442 // CompileBroker::assign_compile_id_unlocked
1443 //
1444 // Public wrapper for assign_compile_id that acquires the needed locks
1445 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1446 MutexLocker locker(MethodCompileQueue_lock, thread);
1447 return assign_compile_id(method, osr_bci);
1448 }
1449
1450 // ------------------------------------------------------------------
1451 // CompileBroker::preload_classes
1452 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1453 // Move this code over from c1_Compiler.cpp
1454 ShouldNotReachHere();
1455 }
1456
1457
1458 // ------------------------------------------------------------------
1459 // CompileBroker::create_compile_task
1460 //
1461 // Create a CompileTask object representing the current request for
1462 // compilation. Add this task to the queue.
1463 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1464 int compile_id,
1465 const methodHandle& method,
1466 int osr_bci,
1467 int comp_level,
1468 const methodHandle& hot_method,
1469 int hot_count,
1470 CompileTask::CompileReason compile_reason,
1471 bool blocking) {
1472 CompileTask* new_task = CompileTask::allocate();
1473 new_task->initialize(compile_id, method, osr_bci, comp_level,
1474 hot_method, hot_count, compile_reason,
1475 blocking);
1476 queue->add(new_task);
1477 return new_task;
1478 }
1479
1480 #if INCLUDE_JVMCI
1481 // The number of milliseconds to wait before checking if
1482 // JVMCI compilation has made progress.
1483 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1484
1485 // The number of JVMCI compilation progress checks that must fail
1486 // before unblocking a thread waiting for a blocking compilation.
1487 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1488
1489 /**
1490 * Waits for a JVMCI compiler to complete a given task. This thread
1491 * waits until either the task completes or it sees no JVMCI compilation
1492 * progress for N consecutive milliseconds where N is
1493 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1494 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1495 *
1496 * @return true if this thread needs to free/recycle the task
1497 */
1498 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1499 MutexLocker waiter(task->lock(), thread);
1500 int progress_wait_attempts = 0;
1501 int methods_compiled = jvmci->methods_compiled();
1502 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1503 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1504 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1505
1506 bool progress;
1507 if (jvmci_compiler_thread != NULL) {
1508 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1509 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1510 !jvmci_compiler_thread->is_external_suspend();
1511 } else {
1512 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1513 // that all JVMCI compiler threads are blocked on. We use the counter for
1514 // successful JVMCI compilations to determine whether JVMCI compilation
1515 // is still making progress through the JVMCI compiler queue.
1516 progress = jvmci->methods_compiled() != methods_compiled;
1517 }
1518
1519 if (!progress) {
1520 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1521 if (PrintCompilation) {
1522 task->print(tty, "wait for blocking compilation timed out");
1523 }
1524 break;
1525 }
1526 } else {
1527 progress_wait_attempts = 0;
1528 if (jvmci_compiler_thread == NULL) {
1529 methods_compiled = jvmci->methods_compiled();
1530 }
1531 }
1532 }
1533 task->clear_waiter();
1534 return task->is_complete();
1535 }
1536 #endif
1537
1538 /**
1539 * Wait for the compilation task to complete.
1540 */
1541 void CompileBroker::wait_for_completion(CompileTask* task) {
1542 if (CIPrintCompileQueue) {
1543 ttyLocker ttyl;
1544 tty->print_cr("BLOCKING FOR COMPILE");
1545 }
1546
1547 assert(task->is_blocking(), "can only wait on blocking task");
1548
1549 JavaThread* thread = JavaThread::current();
1550 thread->set_blocked_on_compilation(true);
1551
1552 methodHandle method(thread, task->method());
1553 bool free_task;
1554 #if INCLUDE_JVMCI
1555 AbstractCompiler* comp = compiler(task->comp_level());
1556 if (comp->is_jvmci()) {
1557 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1558 } else
1559 #endif
1560 {
1561 MutexLocker waiter(task->lock(), thread);
1562 free_task = true;
1563 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1564 task->lock()->wait();
1565 }
1566 }
1567
1568 thread->set_blocked_on_compilation(false);
1569 if (free_task) {
1570 if (is_compilation_disabled_forever()) {
1571 CompileTask::free(task);
1572 return;
1573 }
1574
1575 // It is harmless to check this status without the lock, because
1576 // completion is a stable property (until the task object is recycled).
1577 assert(task->is_complete(), "Compilation should have completed");
1578 assert(task->code_handle() == NULL, "must be reset");
1579
1580 // By convention, the waiter is responsible for recycling a
1581 // blocking CompileTask. Since there is only one waiter ever
1582 // waiting on a CompileTask, we know that no one else will
1583 // be using this CompileTask; we can free it.
1584 CompileTask::free(task);
1585 }
1586 }
1587
1588 /**
1589 * Initialize compiler thread(s) + compiler object(s). The postcondition
1590 * of this function is that the compiler runtimes are initialized and that
1591 * compiler threads can start compiling.
1592 */
1593 bool CompileBroker::init_compiler_runtime() {
1594 CompilerThread* thread = CompilerThread::current();
1595 AbstractCompiler* comp = thread->compiler();
1596 // Final sanity check - the compiler object must exist
1597 guarantee(comp != NULL, "Compiler object must exist");
1598
1599 int system_dictionary_modification_counter;
1600 {
1601 MutexLocker locker(Compile_lock, thread);
1602 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1603 }
1604
1605 {
1606 // Must switch to native to allocate ci_env
1607 ThreadToNativeFromVM ttn(thread);
1608 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1609 // Cache Jvmti state
1610 ci_env.cache_jvmti_state();
1611 // Cache DTrace flags
1612 ci_env.cache_dtrace_flags();
1613
1614 // Switch back to VM state to do compiler initialization
1615 ThreadInVMfromNative tv(thread);
1616 ResetNoHandleMark rnhm;
1617
1618 // Perform per-thread and global initializations
1619 comp->initialize();
1620 }
1621
1622 if (comp->is_failed()) {
1623 disable_compilation_forever();
1624 // If compiler initialization failed, no compiler thread that is specific to a
1625 // particular compiler runtime will ever start to compile methods.
1626 shutdown_compiler_runtime(comp, thread);
1627 return false;
1628 }
1629
1630 // C1 specific check
1631 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1632 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1633 return false;
1634 }
1635
1636 return true;
1637 }
1638
1639 /**
1640 * If C1 and/or C2 initialization failed, we shut down all compilation.
1641 * We do this to keep things simple. This can be changed if it ever turns
1642 * out to be a problem.
1643 */
1644 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1645 // Free buffer blob, if allocated
1646 if (thread->get_buffer_blob() != NULL) {
1647 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1648 CodeCache::free(thread->get_buffer_blob());
1649 }
1650
1651 if (comp->should_perform_shutdown()) {
1652 // There are two reasons for shutting down the compiler
1653 // 1) compiler runtime initialization failed
1654 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1655 warning("%s initialization failed. Shutting down all compilers", comp->name());
1656
1657 // Only one thread per compiler runtime object enters here
1658 // Set state to shut down
1659 comp->set_shut_down();
1660
1661 // Delete all queued compilation tasks to make compiler threads exit faster.
1662 if (_c1_compile_queue != NULL) {
1663 _c1_compile_queue->free_all();
1664 }
1665
1666 if (_c2_compile_queue != NULL) {
1667 _c2_compile_queue->free_all();
1668 }
1669
1670 // Set flags so that we continue execution with using interpreter only.
1671 UseCompiler = false;
1672 UseInterpreter = true;
1673
1674 // We could delete compiler runtimes also. However, there are references to
1675 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1676 // fail. This can be done later if necessary.
1677 }
1678 }
1679
1680 /**
1681 * Helper function to create new or reuse old CompileLog.
1682 */
1683 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1684 if (!LogCompilation) return NULL;
1685
1686 AbstractCompiler *compiler = ct->compiler();
1687 bool c1 = compiler->is_c1();
1688 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1689 assert(compiler_objects != NULL, "must be initialized at this point");
1690 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1691 assert(logs != NULL, "must be initialized at this point");
1692 int count = c1 ? _c1_count : _c2_count;
1693
1694 // Find Compiler number by its threadObj.
1695 oop compiler_obj = ct->threadObj();
1696 int compiler_number = 0;
1697 bool found = false;
1698 for (; compiler_number < count; compiler_number++) {
1699 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1700 found = true;
1701 break;
1702 }
1703 }
1704 assert(found, "Compiler must exist at this point");
1705
1706 // Determine pointer for this thread's log.
1707 CompileLog** log_ptr = &logs[compiler_number];
1708
1709 // Return old one if it exists.
1710 CompileLog* log = *log_ptr;
1711 if (log != NULL) {
1712 ct->init_log(log);
1713 return log;
1714 }
1715
1716 // Create a new one and remember it.
1717 init_compiler_thread_log();
1718 log = ct->log();
1719 *log_ptr = log;
1720 return log;
1721 }
1722
1723 // ------------------------------------------------------------------
1724 // CompileBroker::compiler_thread_loop
1725 //
1726 // The main loop run by a CompilerThread.
1727 void CompileBroker::compiler_thread_loop() {
1728 CompilerThread* thread = CompilerThread::current();
1729 CompileQueue* queue = thread->queue();
1730 // For the thread that initializes the ciObjectFactory
1731 // this resource mark holds all the shared objects
1732 ResourceMark rm;
1733
1734 // First thread to get here will initialize the compiler interface
1735
1736 {
1737 ASSERT_IN_VM;
1738 MutexLocker only_one (CompileThread_lock, thread);
1739 if (!ciObjectFactory::is_initialized()) {
1740 ciObjectFactory::initialize();
1741 }
1742 }
1743
1744 // Open a log.
1745 CompileLog* log = get_log(thread);
1746 if (log != NULL) {
1747 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1748 thread->name(),
1749 os::current_thread_id(),
1750 os::current_process_id());
1751 log->stamp();
1752 log->end_elem();
1753 }
1754
1755 // If compiler thread/runtime initialization fails, exit the compiler thread
1756 if (!init_compiler_runtime()) {
1757 return;
1758 }
1759
1760 thread->start_idle_timer();
1761
1762 // Poll for new compilation tasks as long as the JVM runs. Compilation
1763 // should only be disabled if something went wrong while initializing the
1764 // compiler runtimes. This, in turn, should not happen. The only known case
1765 // when compiler runtime initialization fails is if there is not enough free
1766 // space in the code cache to generate the necessary stubs, etc.
1767 while (!is_compilation_disabled_forever()) {
1768 // We need this HandleMark to avoid leaking VM handles.
1769 HandleMark hm(thread);
1770
1771 CompileTask* task = queue->get();
1772 if (task == NULL) {
1773 if (UseDynamicNumberOfCompilerThreads) {
1774 // Access compiler_count under lock to enforce consistency.
1775 MutexLocker only_one(CompileThread_lock);
1776 if (can_remove(thread, true)) {
1777 if (TraceCompilerThreads) {
1778 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1779 thread->name(), thread->idle_time_millis());
1780 }
1781 // Free buffer blob, if allocated
1782 if (thread->get_buffer_blob() != NULL) {
1783 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1784 CodeCache::free(thread->get_buffer_blob());
1785 }
1786 return; // Stop this thread.
1787 }
1788 }
1789 } else {
1790 // Assign the task to the current thread. Mark this compilation
1791 // thread as active for the profiler.
1792 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1793 // occurs after fetching the compile task off the queue.
1794 CompileTaskWrapper ctw(task);
1795 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1796 task->set_code_handle(&result_handle);
1797 methodHandle method(thread, task->method());
1798
1799 // Never compile a method if breakpoints are present in it
1800 if (method()->number_of_breakpoints() == 0) {
1801 // Compile the method.
1802 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1803 invoke_compiler_on_method(task);
1804 thread->start_idle_timer();
1805 } else {
1806 // After compilation is disabled, remove remaining methods from queue
1807 method->clear_queued_for_compilation();
1808 task->set_failure_reason("compilation is disabled");
1809 }
1810 }
1811
1812 if (UseDynamicNumberOfCompilerThreads) {
1813 possibly_add_compiler_threads();
1814 }
1815 }
1816 }
1817
1818 // Shut down compiler runtime
1819 shutdown_compiler_runtime(thread->compiler(), thread);
1820 }
1821
1822 // ------------------------------------------------------------------
1823 // CompileBroker::init_compiler_thread_log
1824 //
1825 // Set up state required by +LogCompilation.
1826 void CompileBroker::init_compiler_thread_log() {
1827 CompilerThread* thread = CompilerThread::current();
1828 char file_name[4*K];
1829 FILE* fp = NULL;
1830 intx thread_id = os::current_thread_id();
1831 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1832 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1833 if (dir == NULL) {
1834 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1835 thread_id, os::current_process_id());
1836 } else {
1837 jio_snprintf(file_name, sizeof(file_name),
1838 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1839 os::file_separator(), thread_id, os::current_process_id());
1840 }
1841
1842 fp = fopen(file_name, "wt");
1843 if (fp != NULL) {
1844 if (LogCompilation && Verbose) {
1845 tty->print_cr("Opening compilation log %s", file_name);
1846 }
1847 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1848 if (log == NULL) {
1849 fclose(fp);
1850 return;
1851 }
1852 thread->init_log(log);
1853
1854 if (xtty != NULL) {
1855 ttyLocker ttyl;
1856 // Record any per thread log files
1857 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1858 }
1859 return;
1860 }
1861 }
1862 warning("Cannot open log file: %s", file_name);
1863 }
1864
1865 void CompileBroker::log_metaspace_failure() {
1866 const char* message = "some methods may not be compiled because metaspace "
1867 "is out of memory";
1868 if (_compilation_log != NULL) {
1869 _compilation_log->log_metaspace_failure(message);
1870 }
1871 if (PrintCompilation) {
1872 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1873 }
1874 }
1875
1876
1877 // ------------------------------------------------------------------
1878 // CompileBroker::set_should_block
1879 //
1880 // Set _should_block.
1881 // Call this from the VM, with Threads_lock held and a safepoint requested.
1882 void CompileBroker::set_should_block() {
1883 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1884 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1885 #ifndef PRODUCT
1886 if (PrintCompilation && (Verbose || WizardMode))
1887 tty->print_cr("notifying compiler thread pool to block");
1888 #endif
1889 _should_block = true;
1890 }
1891
1892 // ------------------------------------------------------------------
1893 // CompileBroker::maybe_block
1894 //
1895 // Call this from the compiler at convenient points, to poll for _should_block.
1896 void CompileBroker::maybe_block() {
1897 if (_should_block) {
1898 #ifndef PRODUCT
1899 if (PrintCompilation && (Verbose || WizardMode))
1900 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1901 #endif
1902 ThreadInVMfromNative tivfn(JavaThread::current());
1903 }
1904 }
1905
1906 // wrapper for CodeCache::print_summary()
1907 static void codecache_print(bool detailed)
1908 {
1909 ResourceMark rm;
1910 stringStream s;
1911 // Dump code cache into a buffer before locking the tty,
1912 {
1913 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1914 CodeCache::print_summary(&s, detailed);
1915 }
1916 ttyLocker ttyl;
1917 tty->print("%s", s.as_string());
1918 }
1919
1920 // wrapper for CodeCache::print_summary() using outputStream
1921 static void codecache_print(outputStream* out, bool detailed) {
1922 ResourceMark rm;
1923 stringStream s;
1924
1925 // Dump code cache into a buffer
1926 {
1927 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1928 CodeCache::print_summary(&s, detailed);
1929 }
1930
1931 char* remaining_log = s.as_string();
1932 while (*remaining_log != '\0') {
1933 char* eol = strchr(remaining_log, '\n');
1934 if (eol == NULL) {
1935 out->print_cr("%s", remaining_log);
1936 remaining_log = remaining_log + strlen(remaining_log);
1937 } else {
1938 *eol = '\0';
1939 out->print_cr("%s", remaining_log);
1940 remaining_log = eol + 1;
1941 }
1942 }
1943 }
1944
1945 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1946 int compilable, const char* failure_reason) {
1947 if (success) {
1948 task->mark_success();
1949 if (ci_env != NULL) {
1950 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1951 }
1952 if (_compilation_log != NULL) {
1953 nmethod* code = task->code();
1954 if (code != NULL) {
1955 _compilation_log->log_nmethod(thread, code);
1956 }
1957 }
1958 } else if (AbortVMOnCompilationFailure) {
1959 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1960 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
1961 }
1962 if (compilable == ciEnv::MethodCompilable_never) {
1963 fatal("Never compilable: %s", failure_reason);
1964 }
1965 }
1966 // simulate crash during compilation
1967 assert(task->compile_id() != CICrashAt, "just as planned");
1968 }
1969
1970 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1971 assert(event != NULL, "invariant");
1972 assert(event->should_commit(), "invariant");
1973 event->set_method(task->method());
1974 event->set_compileId(task->compile_id());
1975 event->set_compileLevel(task->comp_level());
1976 event->set_succeded(task->is_success());
1977 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1978 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1979 event->set_inlinedBytes(task->num_inlined_bytecodes());
1980 event->commit();
1981 }
1982
1983 int DirectivesStack::_depth = 0;
1984 CompilerDirectives* DirectivesStack::_top = NULL;
1985 CompilerDirectives* DirectivesStack::_bottom = NULL;
1986
1987 // ------------------------------------------------------------------
1988 // CompileBroker::invoke_compiler_on_method
1989 //
1990 // Compile a method.
1991 //
1992 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1993 task->print_ul();
1994 if (PrintCompilation) {
1995 ResourceMark rm;
1996 task->print_tty();
1997 }
1998 elapsedTimer time;
1999
2000 CompilerThread* thread = CompilerThread::current();
2001 ResourceMark rm(thread);
2002
2003 if (LogEvents) {
2004 _compilation_log->log_compile(thread, task);
2005 }
2006
2007 // Common flags.
2008 uint compile_id = task->compile_id();
2009 int osr_bci = task->osr_bci();
2010 bool is_osr = (osr_bci != standard_entry_bci);
2011 bool should_log = (thread->log() != NULL);
2012 bool should_break = false;
2013 const int task_level = task->comp_level();
2014 AbstractCompiler* comp = task->compiler();
2015
2016 DirectiveSet* directive;
2017 {
2018 // create the handle inside it's own block so it can't
2019 // accidentally be referenced once the thread transitions to
2020 // native. The NoHandleMark before the transition should catch
2021 // any cases where this occurs in the future.
2022 methodHandle method(thread, task->method());
2023 assert(!method->is_native(), "no longer compile natives");
2024
2025 // Look up matching directives
2026 directive = DirectivesStack::getMatchingDirective(method, comp);
2027
2028 // Update compile information when using perfdata.
2029 if (UsePerfData) {
2030 update_compile_perf_data(thread, method, is_osr);
2031 }
2032
2033 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2034 }
2035
2036 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2037 if (should_log && !directive->LogOption) {
2038 should_log = false;
2039 }
2040
2041 // Allocate a new set of JNI handles.
2042 push_jni_handle_block();
2043 Method* target_handle = task->method();
2044 int compilable = ciEnv::MethodCompilable;
2045 const char* failure_reason = NULL;
2046 bool failure_reason_on_C_heap = false;
2047 const char* retry_message = NULL;
2048
2049 int system_dictionary_modification_counter;
2050 {
2051 MutexLocker locker(Compile_lock, thread);
2052 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2053 }
2054
2055 #if INCLUDE_JVMCI
2056 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2057 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2058
2059 TraceTime t1("compilation", &time);
2060 EventCompilation event;
2061
2062 // Skip redefined methods
2063 if (target_handle->is_old()) {
2064 failure_reason = "redefined method";
2065 retry_message = "not retryable";
2066 compilable = ciEnv::MethodCompilable_never;
2067 } else {
2068 JVMCIEnv env(task, system_dictionary_modification_counter);
2069 methodHandle method(thread, target_handle);
2070 jvmci->compile_method(method, osr_bci, &env);
2071
2072 failure_reason = env.failure_reason();
2073 failure_reason_on_C_heap = env.failure_reason_on_C_heap();
2074 if (!env.retryable()) {
2075 retry_message = "not retryable";
2076 compilable = ciEnv::MethodCompilable_not_at_tier;
2077 }
2078 }
2079 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2080 if (event.should_commit()) {
2081 post_compilation_event(&event, task);
2082 }
2083
2084 } else
2085 #endif // INCLUDE_JVMCI
2086 {
2087 NoHandleMark nhm;
2088 ThreadToNativeFromVM ttn(thread);
2089
2090 ciEnv ci_env(task, system_dictionary_modification_counter);
2091 if (should_break) {
2092 ci_env.set_break_at_compile(true);
2093 }
2094 if (should_log) {
2095 ci_env.set_log(thread->log());
2096 }
2097 assert(thread->env() == &ci_env, "set by ci_env");
2098 // The thread-env() field is cleared in ~CompileTaskWrapper.
2099
2100 // Cache Jvmti state
2101 ci_env.cache_jvmti_state();
2102
2103 // Cache DTrace flags
2104 ci_env.cache_dtrace_flags();
2105
2106 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2107
2108 TraceTime t1("compilation", &time);
2109 EventCompilation event;
2110
2111 if (comp == NULL) {
2112 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2113 } else {
2114 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2115 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2116 while (WhiteBox::compilation_locked) {
2117 locker.wait(Mutex::_no_safepoint_check_flag);
2118 }
2119 }
2120 comp->compile_method(&ci_env, target, osr_bci, directive);
2121 }
2122
2123 if (!ci_env.failing() && task->code() == NULL) {
2124 //assert(false, "compiler should always document failure");
2125 // The compiler elected, without comment, not to register a result.
2126 // Do not attempt further compilations of this method.
2127 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2128 }
2129
2130 // Copy this bit to the enclosing block:
2131 compilable = ci_env.compilable();
2132
2133 if (ci_env.failing()) {
2134 failure_reason = ci_env.failure_reason();
2135 retry_message = ci_env.retry_message();
2136 ci_env.report_failure(failure_reason);
2137 }
2138
2139 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2140 if (event.should_commit()) {
2141 post_compilation_event(&event, task);
2142 }
2143 }
2144 // Remove the JNI handle block after the ciEnv destructor has run in
2145 // the previous block.
2146 pop_jni_handle_block();
2147
2148 if (failure_reason != NULL) {
2149 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2150 if (_compilation_log != NULL) {
2151 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2152 }
2153 if (PrintCompilation) {
2154 FormatBufferResource msg = retry_message != NULL ?
2155 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2156 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2157 task->print(tty, msg);
2158 }
2159 }
2160
2161 methodHandle method(thread, task->method());
2162
2163 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2164
2165 collect_statistics(thread, time, task);
2166
2167 nmethod* nm = task->code();
2168 if (nm != NULL) {
2169 nm->maybe_print_nmethod(directive);
2170 }
2171 DirectivesStack::release(directive);
2172
2173 if (PrintCompilation && PrintCompilation2) {
2174 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2175 tty->print("%4d ", compile_id); // print compilation number
2176 tty->print("%s ", (is_osr ? "%" : " "));
2177 if (task->code() != NULL) {
2178 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2179 }
2180 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2181 }
2182
2183 Log(compilation, codecache) log;
2184 if (log.is_debug()) {
2185 LogStream ls(log.debug());
2186 codecache_print(&ls, /* detailed= */ false);
2187 }
2188 if (PrintCodeCacheOnCompilation) {
2189 codecache_print(/* detailed= */ false);
2190 }
2191 // Disable compilation, if required.
2192 switch (compilable) {
2193 case ciEnv::MethodCompilable_never:
2194 if (is_osr)
2195 method->set_not_osr_compilable_quietly();
2196 else
2197 method->set_not_compilable_quietly();
2198 break;
2199 case ciEnv::MethodCompilable_not_at_tier:
2200 if (is_osr)
2201 method->set_not_osr_compilable_quietly(task_level);
2202 else
2203 method->set_not_compilable_quietly(task_level);
2204 break;
2205 }
2206
2207 // Note that the queued_for_compilation bits are cleared without
2208 // protection of a mutex. [They were set by the requester thread,
2209 // when adding the task to the compile queue -- at which time the
2210 // compile queue lock was held. Subsequently, we acquired the compile
2211 // queue lock to get this task off the compile queue; thus (to belabour
2212 // the point somewhat) our clearing of the bits must be occurring
2213 // only after the setting of the bits. See also 14012000 above.
2214 method->clear_queued_for_compilation();
2215 }
2216
2217 /**
2218 * The CodeCache is full. Print warning and disable compilation.
2219 * Schedule code cache cleaning so compilation can continue later.
2220 * This function needs to be called only from CodeCache::allocate(),
2221 * since we currently handle a full code cache uniformly.
2222 */
2223 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2224 UseInterpreter = true;
2225 if (UseCompiler || AlwaysCompileLoopMethods ) {
2226 if (xtty != NULL) {
2227 ResourceMark rm;
2228 stringStream s;
2229 // Dump code cache state into a buffer before locking the tty,
2230 // because log_state() will use locks causing lock conflicts.
2231 CodeCache::log_state(&s);
2232 // Lock to prevent tearing
2233 ttyLocker ttyl;
2234 xtty->begin_elem("code_cache_full");
2235 xtty->print("%s", s.as_string());
2236 xtty->stamp();
2237 xtty->end_elem();
2238 }
2239
2240 #ifndef PRODUCT
2241 if (ExitOnFullCodeCache) {
2242 codecache_print(/* detailed= */ true);
2243 before_exit(JavaThread::current());
2244 exit_globals(); // will delete tty
2245 vm_direct_exit(1);
2246 }
2247 #endif
2248 if (UseCodeCacheFlushing) {
2249 // Since code cache is full, immediately stop new compiles
2250 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2251 NMethodSweeper::log_sweep("disable_compiler");
2252 }
2253 } else {
2254 disable_compilation_forever();
2255 }
2256
2257 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2258 }
2259 }
2260
2261 // ------------------------------------------------------------------
2262 // CompileBroker::update_compile_perf_data
2263 //
2264 // Record this compilation for debugging purposes.
2265 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2266 ResourceMark rm;
2267 char* method_name = method->name()->as_C_string();
2268 char current_method[CompilerCounters::cmname_buffer_length];
2269 size_t maxLen = CompilerCounters::cmname_buffer_length;
2270
2271 const char* class_name = method->method_holder()->name()->as_C_string();
2272
2273 size_t s1len = strlen(class_name);
2274 size_t s2len = strlen(method_name);
2275
2276 // check if we need to truncate the string
2277 if (s1len + s2len + 2 > maxLen) {
2278
2279 // the strategy is to lop off the leading characters of the
2280 // class name and the trailing characters of the method name.
2281
2282 if (s2len + 2 > maxLen) {
2283 // lop of the entire class name string, let snprintf handle
2284 // truncation of the method name.
2285 class_name += s1len; // null string
2286 }
2287 else {
2288 // lop off the extra characters from the front of the class name
2289 class_name += ((s1len + s2len + 2) - maxLen);
2290 }
2291 }
2292
2293 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2294
2295 int last_compile_type = normal_compile;
2296 if (CICountOSR && is_osr) {
2297 last_compile_type = osr_compile;
2298 }
2299
2300 CompilerCounters* counters = thread->counters();
2301 counters->set_current_method(current_method);
2302 counters->set_compile_type((jlong) last_compile_type);
2303 }
2304
2305 // ------------------------------------------------------------------
2306 // CompileBroker::push_jni_handle_block
2307 //
2308 // Push on a new block of JNI handles.
2309 void CompileBroker::push_jni_handle_block() {
2310 JavaThread* thread = JavaThread::current();
2311
2312 // Allocate a new block for JNI handles.
2313 // Inlined code from jni_PushLocalFrame()
2314 JNIHandleBlock* java_handles = thread->active_handles();
2315 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2316 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2317 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2318 thread->set_active_handles(compile_handles);
2319 }
2320
2321
2322 // ------------------------------------------------------------------
2323 // CompileBroker::pop_jni_handle_block
2324 //
2325 // Pop off the current block of JNI handles.
2326 void CompileBroker::pop_jni_handle_block() {
2327 JavaThread* thread = JavaThread::current();
2328
2329 // Release our JNI handle block
2330 JNIHandleBlock* compile_handles = thread->active_handles();
2331 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2332 thread->set_active_handles(java_handles);
2333 compile_handles->set_pop_frame_link(NULL);
2334 JNIHandleBlock::release_block(compile_handles, thread); // may block
2335 }
2336
2337 // ------------------------------------------------------------------
2338 // CompileBroker::collect_statistics
2339 //
2340 // Collect statistics about the compilation.
2341
2342 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2343 bool success = task->is_success();
2344 methodHandle method (thread, task->method());
2345 uint compile_id = task->compile_id();
2346 bool is_osr = (task->osr_bci() != standard_entry_bci);
2347 nmethod* code = task->code();
2348 CompilerCounters* counters = thread->counters();
2349
2350 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2351 MutexLocker locker(CompileStatistics_lock);
2352
2353 // _perf variables are production performance counters which are
2354 // updated regardless of the setting of the CITime and CITimeEach flags
2355 //
2356
2357 // account all time, including bailouts and failures in this counter;
2358 // C1 and C2 counters are counting both successful and unsuccessful compiles
2359 _t_total_compilation.add(time);
2360
2361 if (!success) {
2362 _total_bailout_count++;
2363 if (UsePerfData) {
2364 _perf_last_failed_method->set_value(counters->current_method());
2365 _perf_last_failed_type->set_value(counters->compile_type());
2366 _perf_total_bailout_count->inc();
2367 }
2368 _t_bailedout_compilation.add(time);
2369 } else if (code == NULL) {
2370 if (UsePerfData) {
2371 _perf_last_invalidated_method->set_value(counters->current_method());
2372 _perf_last_invalidated_type->set_value(counters->compile_type());
2373 _perf_total_invalidated_count->inc();
2374 }
2375 _total_invalidated_count++;
2376 _t_invalidated_compilation.add(time);
2377 } else {
2378 // Compilation succeeded
2379
2380 // update compilation ticks - used by the implementation of
2381 // java.lang.management.CompilationMBean
2382 _perf_total_compilation->inc(time.ticks());
2383 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2384
2385 if (CITime) {
2386 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2387 if (is_osr) {
2388 _t_osr_compilation.add(time);
2389 _sum_osr_bytes_compiled += bytes_compiled;
2390 } else {
2391 _t_standard_compilation.add(time);
2392 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2393 }
2394
2395 #if INCLUDE_JVMCI
2396 AbstractCompiler* comp = compiler(task->comp_level());
2397 if (comp) {
2398 CompilerStatistics* stats = comp->stats();
2399 if (stats) {
2400 if (is_osr) {
2401 stats->_osr.update(time, bytes_compiled);
2402 } else {
2403 stats->_standard.update(time, bytes_compiled);
2404 }
2405 stats->_nmethods_size += code->total_size();
2406 stats->_nmethods_code_size += code->insts_size();
2407 } else { // if (!stats)
2408 assert(false, "Compiler statistics object must exist");
2409 }
2410 } else { // if (!comp)
2411 assert(false, "Compiler object must exist");
2412 }
2413 #endif // INCLUDE_JVMCI
2414 }
2415
2416 if (UsePerfData) {
2417 // save the name of the last method compiled
2418 _perf_last_method->set_value(counters->current_method());
2419 _perf_last_compile_type->set_value(counters->compile_type());
2420 _perf_last_compile_size->set_value(method->code_size() +
2421 task->num_inlined_bytecodes());
2422 if (is_osr) {
2423 _perf_osr_compilation->inc(time.ticks());
2424 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2425 } else {
2426 _perf_standard_compilation->inc(time.ticks());
2427 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2428 }
2429 }
2430
2431 if (CITimeEach) {
2432 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2433 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2434 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2435 }
2436
2437 // Collect counts of successful compilations
2438 _sum_nmethod_size += code->total_size();
2439 _sum_nmethod_code_size += code->insts_size();
2440 _total_compile_count++;
2441
2442 if (UsePerfData) {
2443 _perf_sum_nmethod_size->inc( code->total_size());
2444 _perf_sum_nmethod_code_size->inc(code->insts_size());
2445 _perf_total_compile_count->inc();
2446 }
2447
2448 if (is_osr) {
2449 if (UsePerfData) _perf_total_osr_compile_count->inc();
2450 _total_osr_compile_count++;
2451 } else {
2452 if (UsePerfData) _perf_total_standard_compile_count->inc();
2453 _total_standard_compile_count++;
2454 }
2455 }
2456 // set the current method for the thread to null
2457 if (UsePerfData) counters->set_current_method("");
2458 }
2459
2460 const char* CompileBroker::compiler_name(int comp_level) {
2461 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2462 if (comp == NULL) {
2463 return "no compiler";
2464 } else {
2465 return (comp->name());
2466 }
2467 }
2468
2469 #if INCLUDE_JVMCI
2470 void CompileBroker::print_times(AbstractCompiler* comp) {
2471 CompilerStatistics* stats = comp->stats();
2472 if (stats) {
2473 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}",
2474 comp->name(), stats->bytes_per_second(),
2475 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2476 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2477 stats->_nmethods_size, stats->_nmethods_code_size);
2478 } else { // if (!stats)
2479 assert(false, "Compiler statistics object must exist");
2480 }
2481 comp->print_timers();
2482 }
2483 #endif // INCLUDE_JVMCI
2484
2485 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2486 #if INCLUDE_JVMCI
2487 elapsedTimer standard_compilation;
2488 elapsedTimer total_compilation;
2489 elapsedTimer osr_compilation;
2490
2491 int standard_bytes_compiled = 0;
2492 int osr_bytes_compiled = 0;
2493
2494 int standard_compile_count = 0;
2495 int osr_compile_count = 0;
2496 int total_compile_count = 0;
2497
2498 int nmethods_size = 0;
2499 int nmethods_code_size = 0;
2500 bool printedHeader = false;
2501
2502 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2503 AbstractCompiler* comp = _compilers[i];
2504 if (comp != NULL) {
2505 if (per_compiler && aggregate && !printedHeader) {
2506 printedHeader = true;
2507 tty->cr();
2508 tty->print_cr("Individual compiler times (for compiled methods only)");
2509 tty->print_cr("------------------------------------------------");
2510 tty->cr();
2511 }
2512 CompilerStatistics* stats = comp->stats();
2513
2514 if (stats) {
2515 standard_compilation.add(stats->_standard._time);
2516 osr_compilation.add(stats->_osr._time);
2517
2518 standard_bytes_compiled += stats->_standard._bytes;
2519 osr_bytes_compiled += stats->_osr._bytes;
2520
2521 standard_compile_count += stats->_standard._count;
2522 osr_compile_count += stats->_osr._count;
2523
2524 nmethods_size += stats->_nmethods_size;
2525 nmethods_code_size += stats->_nmethods_code_size;
2526 } else { // if (!stats)
2527 assert(false, "Compiler statistics object must exist");
2528 }
2529
2530 if (per_compiler) {
2531 print_times(comp);
2532 }
2533 }
2534 }
2535 total_compile_count = osr_compile_count + standard_compile_count;
2536 total_compilation.add(osr_compilation);
2537 total_compilation.add(standard_compilation);
2538
2539 // In hosted mode, print the JVMCI compiler specific counters manually.
2540 if (!UseJVMCICompiler) {
2541 JVMCICompiler::print_compilation_timers();
2542 }
2543 #else // INCLUDE_JVMCI
2544 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2545 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2546 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2547
2548 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2549 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2550
2551 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2552 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2553 int total_compile_count = CompileBroker::_total_compile_count;
2554
2555 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2556 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2557 #endif // INCLUDE_JVMCI
2558
2559 if (!aggregate) {
2560 return;
2561 }
2562 tty->cr();
2563 tty->print_cr("Accumulated compiler times");
2564 tty->print_cr("----------------------------------------------------------");
2565 //0000000000111111111122222222223333333333444444444455555555556666666666
2566 //0123456789012345678901234567890123456789012345678901234567890123456789
2567 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2568 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2569 standard_compilation.seconds(),
2570 standard_compilation.seconds() / standard_compile_count);
2571 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2572 CompileBroker::_t_bailedout_compilation.seconds(),
2573 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2574 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2575 osr_compilation.seconds(),
2576 osr_compilation.seconds() / osr_compile_count);
2577 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2578 CompileBroker::_t_invalidated_compilation.seconds(),
2579 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2580
2581 AbstractCompiler *comp = compiler(CompLevel_simple);
2582 if (comp != NULL) {
2583 tty->cr();
2584 comp->print_timers();
2585 }
2586 comp = compiler(CompLevel_full_optimization);
2587 if (comp != NULL) {
2588 tty->cr();
2589 comp->print_timers();
2590 }
2591 tty->cr();
2592 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2593 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2594 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2595 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2596 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2597 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2598 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2599 double tcs = total_compilation.seconds();
2600 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2601 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2602 tty->cr();
2603 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2604 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2605 }
2606
2607 // Print general/accumulated JIT information.
2608 void CompileBroker::print_info(outputStream *out) {
2609 if (out == NULL) out = tty;
2610 out->cr();
2611 out->print_cr("======================");
2612 out->print_cr(" General JIT info ");
2613 out->print_cr("======================");
2614 out->cr();
2615 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2616 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2617 out->cr();
2618 out->print_cr("CodeCache overview");
2619 out->print_cr("--------------------------------------------------------");
2620 out->cr();
2621 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2622 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2623 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2624 out->cr();
2625
2626 out->cr();
2627 out->print_cr("CodeCache cleaning overview");
2628 out->print_cr("--------------------------------------------------------");
2629 out->cr();
2630 NMethodSweeper::print(out);
2631 out->print_cr("--------------------------------------------------------");
2632 out->cr();
2633 }
2634
2635 // Note: tty_lock must not be held upon entry to this function.
2636 // Print functions called from herein do "micro-locking" on tty_lock.
2637 // That's a tradeoff which keeps together important blocks of output.
2638 // At the same time, continuous tty_lock hold time is kept in check,
2639 // preventing concurrently printing threads from stalling a long time.
2640 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2641 TimeStamp ts_total;
2642 TimeStamp ts_global;
2643 TimeStamp ts;
2644
2645 bool allFun = !strcmp(function, "all");
2646 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2647 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2648 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2649 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2650 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2651 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2652 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2653 bool discard = !strcmp(function, "discard") || allFun;
2654
2655 if (out == NULL) {
2656 out = tty;
2657 }
2658
2659 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2660 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2661 out->cr();
2662 return;
2663 }
2664
2665 ts_total.update(); // record starting point
2666
2667 if (aggregate) {
2668 print_info(out);
2669 }
2670
2671 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2672 // That prevents another thread from destroying our view on the CodeHeap.
2673 // When we request individual parts of the analysis via the jcmd interface, it is possible
2674 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2675 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2676 // across user interaction.
2677 // Acquire this lock before acquiring the CodeCache_lock.
2678 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2679 // leading to an unnecessarily long hold time of the CodeCache_lock.
2680 ts.update(); // record starting point
2681 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2682 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2683
2684 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2685 // for the entire duration of aggregation and printing. That makes sure
2686 // we see a consistent picture and do not run into issues caused by
2687 // the CodeHeap being altered concurrently.
2688 Monitor* global_lock = allFun ? CodeCache_lock : NULL;
2689 Monitor* function_lock = allFun ? NULL : CodeCache_lock;
2690 ts_global.update(); // record starting point
2691 MutexLockerEx mu2(global_lock, Mutex::_no_safepoint_check_flag);
2692 if (global_lock != NULL) {
2693 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2694 ts_global.update(); // record starting point
2695 }
2696
2697 if (aggregate) {
2698 ts.update(); // record starting point
2699 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag);
2700 if (function_lock != NULL) {
2701 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2702 }
2703
2704 ts.update(); // record starting point
2705 CodeCache::aggregate(out, granularity);
2706 if (function_lock != NULL) {
2707 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2708 }
2709 }
2710
2711 if (usedSpace) CodeCache::print_usedSpace(out);
2712 if (freeSpace) CodeCache::print_freeSpace(out);
2713 if (methodCount) CodeCache::print_count(out);
2714 if (methodSpace) CodeCache::print_space(out);
2715 if (methodAge) CodeCache::print_age(out);
2716 if (methodNames) {
2717 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2718 // Therefore, request the CodeCache_lock before calling...
2719 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag);
2720 CodeCache::print_names(out);
2721 }
2722 if (discard) CodeCache::discard(out);
2723
2724 if (global_lock != NULL) {
2725 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2726 }
2727 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2728 }