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 // Debugging information
139 int CompileBroker::_last_compile_type = no_compile;
140 int CompileBroker::_last_compile_level = CompLevel_none;
141 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
142
143 // Performance counters
144 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
146 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
147
148 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
153
154 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
157 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
158
159 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
161 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
163 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
164 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
165 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
166
167 // Timers and counters for generating statistics
168 elapsedTimer CompileBroker::_t_total_compilation;
169 elapsedTimer CompileBroker::_t_osr_compilation;
170 elapsedTimer CompileBroker::_t_standard_compilation;
171 elapsedTimer CompileBroker::_t_invalidated_compilation;
172 elapsedTimer CompileBroker::_t_bailedout_compilation;
173
174 int CompileBroker::_total_bailout_count = 0;
175 int CompileBroker::_total_invalidated_count = 0;
176 int CompileBroker::_total_compile_count = 0;
177 int CompileBroker::_total_osr_compile_count = 0;
178 int CompileBroker::_total_standard_compile_count = 0;
179 int CompileBroker::_total_compiler_stopped_count = 0;
180 int CompileBroker::_total_compiler_restarted_count = 0;
181
182 int CompileBroker::_sum_osr_bytes_compiled = 0;
183 int CompileBroker::_sum_standard_bytes_compiled = 0;
184 int CompileBroker::_sum_nmethod_size = 0;
185 int CompileBroker::_sum_nmethod_code_size = 0;
186
187 long CompileBroker::_peak_compilation_time = 0;
188
189 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
190 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
191
192
193
194 class CompilationLog : public StringEventLog {
195 public:
196 CompilationLog() : StringEventLog("Compilation events") {
197 }
198
199 void log_compile(JavaThread* thread, CompileTask* task) {
200 StringLogMessage lm;
201 stringStream sstr = lm.stream();
202 // msg.time_stamp().update_to(tty->time_stamp().ticks());
203 task->print(&sstr, NULL, true, false);
204 log(thread, "%s", (const char*)lm);
205 }
206
207 void log_nmethod(JavaThread* thread, nmethod* nm) {
208 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
209 nm->compile_id(), nm->is_osr_method() ? "%" : "",
210 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
211 }
212
213 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
214 StringLogMessage lm;
215 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
216 if (retry_message != NULL) {
217 lm.append(" (%s)", retry_message);
218 }
219 lm.print("\n");
220 log(thread, "%s", (const char*)lm);
221 }
222
223 void log_metaspace_failure(const char* reason) {
224 ResourceMark rm;
225 StringLogMessage lm;
226 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
227 lm.print("\n");
228 log(JavaThread::current(), "%s", (const char*)lm);
229 }
230 };
231
232 static CompilationLog* _compilation_log = NULL;
233
234 bool compileBroker_init() {
235 if (LogEvents) {
236 _compilation_log = new CompilationLog();
237 }
238
239 // init directives stack, adding default directive
240 DirectivesStack::init();
241
242 if (DirectivesParser::has_file()) {
243 return DirectivesParser::parse_from_flag();
244 } else if (CompilerDirectivesPrint) {
245 // Print default directive even when no other was added
246 DirectivesStack::print(tty);
247 }
248
249 return true;
250 }
251
252 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
253 CompilerThread* thread = CompilerThread::current();
254 thread->set_task(task);
255 #if INCLUDE_JVMCI
256 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
257 task->set_jvmci_compiler_thread(thread);
258 }
259 #endif
260 CompileLog* log = thread->log();
261 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
262 }
263
264 CompileTaskWrapper::~CompileTaskWrapper() {
265 CompilerThread* thread = CompilerThread::current();
266 CompileTask* task = thread->task();
267 CompileLog* log = thread->log();
268 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
269 thread->set_task(NULL);
270 task->set_code_handle(NULL);
271 thread->set_env(NULL);
272 if (task->is_blocking()) {
273 bool free_task = false;
274 {
275 MutexLocker notifier(task->lock(), thread);
276 task->mark_complete();
277 #if INCLUDE_JVMCI
278 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
279 if (!task->has_waiter()) {
280 // The waiting thread timed out and thus did not free the task.
281 free_task = true;
282 }
283 task->set_jvmci_compiler_thread(NULL);
284 }
285 #endif
286 if (!free_task) {
287 // Notify the waiting thread that the compilation has completed
288 // so that it can free the task.
289 task->lock()->notify_all();
290 }
291 }
292 if (free_task) {
293 // The task can only be freed once the task lock is released.
294 CompileTask::free(task);
295 }
296 } else {
297 task->mark_complete();
298
299 // By convention, the compiling thread is responsible for
300 // recycling a non-blocking CompileTask.
301 CompileTask::free(task);
302 }
303 }
304
305 /**
306 * Check if a CompilerThread can be removed and update count if requested.
307 */
308 static bool can_remove(CompilerThread *ct, bool do_it) {
309 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
310 if (!ReduceNumberOfCompilerThreads) return false;
311
312 AbstractCompiler *compiler = ct->compiler();
313 int compiler_count = compiler->num_compiler_threads();
314 bool c1 = compiler->is_c1();
315
316 // Keep at least 1 compiler thread of each type.
317 if (compiler_count < 2) return false;
318
319 // Keep thread alive for at least some time.
320 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
321
322 // We only allow the last compiler thread of each type to get removed.
323 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
324 : CompileBroker::compiler2_object(compiler_count - 1);
325 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
326 if (do_it) {
327 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
328 compiler->set_num_compiler_threads(compiler_count - 1);
329 }
330 return true;
331 }
332 return false;
333 }
334
335 /**
336 * Add a CompileTask to a CompileQueue.
337 */
338 void CompileQueue::add(CompileTask* task) {
339 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
340
341 task->set_next(NULL);
342 task->set_prev(NULL);
343
344 if (_last == NULL) {
345 // The compile queue is empty.
346 assert(_first == NULL, "queue is empty");
347 _first = task;
348 _last = task;
349 } else {
350 // Append the task to the queue.
351 assert(_last->next() == NULL, "not last");
352 _last->set_next(task);
353 task->set_prev(_last);
354 _last = task;
355 }
356 ++_size;
357
358 // Mark the method as being in the compile queue.
359 task->method()->set_queued_for_compilation();
360
361 if (CIPrintCompileQueue) {
362 print_tty();
363 }
364
365 if (LogCompilation && xtty != NULL) {
366 task->log_task_queued();
367 }
368
369 // Notify CompilerThreads that a task is available.
370 MethodCompileQueue_lock->notify_all();
371 }
372
373 /**
374 * Empties compilation queue by putting all compilation tasks onto
375 * a freelist. Furthermore, the method wakes up all threads that are
376 * waiting on a compilation task to finish. This can happen if background
377 * compilation is disabled.
378 */
379 void CompileQueue::free_all() {
380 MutexLocker mu(MethodCompileQueue_lock);
381 CompileTask* next = _first;
382
383 // Iterate over all tasks in the compile queue
384 while (next != NULL) {
385 CompileTask* current = next;
386 next = current->next();
387 {
388 // Wake up thread that blocks on the compile task.
389 MutexLocker ct_lock(current->lock());
390 current->lock()->notify();
391 }
392 // Put the task back on the freelist.
393 CompileTask::free(current);
394 }
395 _first = NULL;
396
397 // Wake up all threads that block on the queue.
398 MethodCompileQueue_lock->notify_all();
399 }
400
401 /**
402 * Get the next CompileTask from a CompileQueue
403 */
404 CompileTask* CompileQueue::get() {
405 // save methods from RedefineClasses across safepoint
406 // across MethodCompileQueue_lock below.
407 methodHandle save_method;
408 methodHandle save_hot_method;
409
410 MutexLocker locker(MethodCompileQueue_lock);
411 // If _first is NULL we have no more compile jobs. There are two reasons for
412 // having no compile jobs: First, we compiled everything we wanted. Second,
413 // we ran out of code cache so compilation has been disabled. In the latter
414 // case we perform code cache sweeps to free memory such that we can re-enable
415 // compilation.
416 while (_first == NULL) {
417 // Exit loop if compilation is disabled forever
418 if (CompileBroker::is_compilation_disabled_forever()) {
419 return NULL;
420 }
421
422 // If there are no compilation tasks and we can compile new jobs
423 // (i.e., there is enough free space in the code cache) there is
424 // no need to invoke the sweeper. As a result, the hotness of methods
425 // remains unchanged. This behavior is desired, since we want to keep
426 // the stable state, i.e., we do not want to evict methods from the
427 // code cache if it is unnecessary.
428 // We need a timed wait here, since compiler threads can exit if compilation
429 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
430 // is not critical and we do not want idle compiler threads to wake up too often.
431 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
432
433 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
434 // Still nothing to compile. Give caller a chance to stop this thread.
435 if (can_remove(CompilerThread::current(), false)) return NULL;
436 }
437 }
438
439 if (CompileBroker::is_compilation_disabled_forever()) {
440 return NULL;
441 }
442
443 CompileTask* task;
444 {
445 NoSafepointVerifier nsv;
446 task = CompilationPolicy::policy()->select_task(this);
447 if (task != NULL) {
448 task = task->select_for_compilation();
449 }
450 }
451
452 if (task != NULL) {
453 // Save method pointers across unlock safepoint. The task is removed from
454 // the compilation queue, which is walked during RedefineClasses.
455 save_method = methodHandle(task->method());
456 save_hot_method = methodHandle(task->hot_method());
457
458 remove(task);
459 purge_stale_tasks(); // may temporarily release MCQ lock
460 }
461 return task;
462 }
463
464 // Clean & deallocate stale compile tasks.
465 // Temporarily releases MethodCompileQueue lock.
466 void CompileQueue::purge_stale_tasks() {
467 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
468 if (_first_stale != NULL) {
469 // Stale tasks are purged when MCQ lock is released,
470 // but _first_stale updates are protected by MCQ lock.
471 // Once task processing starts and MCQ lock is released,
472 // other compiler threads can reuse _first_stale.
473 CompileTask* head = _first_stale;
474 _first_stale = NULL;
475 {
476 MutexUnlocker ul(MethodCompileQueue_lock);
477 for (CompileTask* task = head; task != NULL; ) {
478 CompileTask* next_task = task->next();
479 CompileTaskWrapper ctw(task); // Frees the task
480 task->set_failure_reason("stale task");
481 task = next_task;
482 }
483 }
484 }
485 }
486
487 void CompileQueue::remove(CompileTask* task) {
488 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
489 if (task->prev() != NULL) {
490 task->prev()->set_next(task->next());
491 } else {
492 // max is the first element
493 assert(task == _first, "Sanity");
494 _first = task->next();
495 }
496
497 if (task->next() != NULL) {
498 task->next()->set_prev(task->prev());
499 } else {
500 // max is the last element
501 assert(task == _last, "Sanity");
502 _last = task->prev();
503 }
504 --_size;
505 }
506
507 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
508 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
509 remove(task);
510
511 // Enqueue the task for reclamation (should be done outside MCQ lock)
512 task->set_next(_first_stale);
513 task->set_prev(NULL);
514 _first_stale = task;
515 }
516
517 // methods in the compile queue need to be marked as used on the stack
518 // so that they don't get reclaimed by Redefine Classes
519 void CompileQueue::mark_on_stack() {
520 CompileTask* task = _first;
521 while (task != NULL) {
522 task->mark_on_stack();
523 task = task->next();
524 }
525 }
526
527
528 CompileQueue* CompileBroker::compile_queue(int comp_level) {
529 if (is_c2_compile(comp_level)) return _c2_compile_queue;
530 if (is_c1_compile(comp_level)) return _c1_compile_queue;
531 return NULL;
532 }
533
534 void CompileBroker::print_compile_queues(outputStream* st) {
535 st->print_cr("Current compiles: ");
536
537 char buf[2000];
538 int buflen = sizeof(buf);
539 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
540
541 st->cr();
542 if (_c1_compile_queue != NULL) {
543 _c1_compile_queue->print(st);
544 }
545 if (_c2_compile_queue != NULL) {
546 _c2_compile_queue->print(st);
547 }
548 }
549
550 void CompileQueue::print(outputStream* st) {
551 assert_locked_or_safepoint(MethodCompileQueue_lock);
552 st->print_cr("%s:", name());
553 CompileTask* task = _first;
554 if (task == NULL) {
555 st->print_cr("Empty");
556 } else {
557 while (task != NULL) {
558 task->print(st, NULL, true, true);
559 task = task->next();
560 }
561 }
562 st->cr();
563 }
564
565 void CompileQueue::print_tty() {
566 ttyLocker ttyl;
567 print(tty);
568 }
569
570 CompilerCounters::CompilerCounters() {
571 _current_method[0] = '\0';
572 _compile_type = CompileBroker::no_compile;
573 }
574
575 // ------------------------------------------------------------------
576 // CompileBroker::compilation_init
577 //
578 // Initialize the Compilation object
579 void CompileBroker::compilation_init_phase1(TRAPS) {
580 _last_method_compiled[0] = '\0';
581
582 // No need to initialize compilation system if we do not use it.
583 if (!UseCompiler) {
584 return;
585 }
586 // Set the interface to the current compiler(s).
587 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
588 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
589
590 #if INCLUDE_JVMCI
591 if (EnableJVMCI) {
592 // This is creating a JVMCICompiler singleton.
593 JVMCICompiler* jvmci = new JVMCICompiler();
594
595 if (UseJVMCICompiler) {
596 _compilers[1] = jvmci;
597 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
598 if (BootstrapJVMCI) {
599 // JVMCI will bootstrap so give it more threads
600 _c2_count = MIN2(32, os::active_processor_count());
601 }
602 } else {
603 _c2_count = JVMCIThreads;
604 }
605 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
606 } else {
607 _c1_count = JVMCIHostThreads;
608 }
609 }
610 }
611 #endif // INCLUDE_JVMCI
612
613 #ifdef COMPILER1
614 if (_c1_count > 0) {
615 _compilers[0] = new Compiler();
616 }
617 #endif // COMPILER1
618
619 #ifdef COMPILER2
620 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
621 if (_c2_count > 0) {
622 _compilers[1] = new C2Compiler();
623 }
624 }
625 #endif // COMPILER2
626
627 // Start the compiler thread(s) and the sweeper thread
628 init_compiler_sweeper_threads();
629 // totalTime performance counter is always created as it is required
630 // by the implementation of java.lang.management.CompilationMBean.
631 {
632 EXCEPTION_MARK;
633 _perf_total_compilation =
634 PerfDataManager::create_counter(JAVA_CI, "totalTime",
635 PerfData::U_Ticks, CHECK);
636 }
637
638 if (UsePerfData) {
639
640 EXCEPTION_MARK;
641
642 // create the jvmstat performance counters
643 _perf_osr_compilation =
644 PerfDataManager::create_counter(SUN_CI, "osrTime",
645 PerfData::U_Ticks, CHECK);
646
647 _perf_standard_compilation =
648 PerfDataManager::create_counter(SUN_CI, "standardTime",
649 PerfData::U_Ticks, CHECK);
650
651 _perf_total_bailout_count =
652 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
653 PerfData::U_Events, CHECK);
654
655 _perf_total_invalidated_count =
656 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
657 PerfData::U_Events, CHECK);
658
659 _perf_total_compile_count =
660 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
661 PerfData::U_Events, CHECK);
662 _perf_total_osr_compile_count =
663 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
664 PerfData::U_Events, CHECK);
665
666 _perf_total_standard_compile_count =
667 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
668 PerfData::U_Events, CHECK);
669
670 _perf_sum_osr_bytes_compiled =
671 PerfDataManager::create_counter(SUN_CI, "osrBytes",
672 PerfData::U_Bytes, CHECK);
673
674 _perf_sum_standard_bytes_compiled =
675 PerfDataManager::create_counter(SUN_CI, "standardBytes",
676 PerfData::U_Bytes, CHECK);
677
678 _perf_sum_nmethod_size =
679 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
680 PerfData::U_Bytes, CHECK);
681
682 _perf_sum_nmethod_code_size =
683 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
684 PerfData::U_Bytes, CHECK);
685
686 _perf_last_method =
687 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
688 CompilerCounters::cmname_buffer_length,
689 "", CHECK);
690
691 _perf_last_failed_method =
692 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
693 CompilerCounters::cmname_buffer_length,
694 "", CHECK);
695
696 _perf_last_invalidated_method =
697 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
698 CompilerCounters::cmname_buffer_length,
699 "", CHECK);
700
701 _perf_last_compile_type =
702 PerfDataManager::create_variable(SUN_CI, "lastType",
703 PerfData::U_None,
704 (jlong)CompileBroker::no_compile,
705 CHECK);
706
707 _perf_last_compile_size =
708 PerfDataManager::create_variable(SUN_CI, "lastSize",
709 PerfData::U_Bytes,
710 (jlong)CompileBroker::no_compile,
711 CHECK);
712
713
714 _perf_last_failed_type =
715 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
716 PerfData::U_None,
717 (jlong)CompileBroker::no_compile,
718 CHECK);
719
720 _perf_last_invalidated_type =
721 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
722 PerfData::U_None,
723 (jlong)CompileBroker::no_compile,
724 CHECK);
725 }
726 }
727
728 // Completes compiler initialization. Compilation requests submitted
729 // prior to this will be silently ignored.
730 void CompileBroker::compilation_init_phase2() {
731 _initialized = true;
732 }
733
734 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
735 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
736 Handle thread_group(THREAD, Universe::system_thread_group());
737 return JavaCalls::construct_new_instance(
738 SystemDictionary::Thread_klass(),
739 vmSymbols::threadgroup_string_void_signature(),
740 thread_group,
741 string,
742 CHECK_NH);
743 }
744
745
746 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) {
747 JavaThread* thread = NULL;
748 {
749 MutexLocker mu(Threads_lock, THREAD);
750 if (comp != NULL) {
751 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
752 CompilerCounters* counters = new CompilerCounters();
753 thread = new CompilerThread(queue, counters);
754 }
755 } else {
756 thread = new CodeCacheSweeperThread();
757 }
758 // At this point the new CompilerThread data-races with this startup
759 // thread (which I believe is the primoridal thread and NOT the VM
760 // thread). This means Java bytecodes being executed at startup can
761 // queue compile jobs which will run at whatever default priority the
762 // newly created CompilerThread runs at.
763
764
765 // At this point it may be possible that no osthread was created for the
766 // JavaThread due to lack of memory. We would have to throw an exception
767 // in that case. However, since this must work and we do not allow
768 // exceptions anyway, check and abort if this fails. But first release the
769 // lock.
770
771 if (thread != NULL && thread->osthread() != NULL) {
772
773 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
774
775 // Note that this only sets the JavaThread _priority field, which by
776 // definition is limited to Java priorities and not OS priorities.
777 // The os-priority is set in the CompilerThread startup code itself
778
779 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
780
781 // Note that we cannot call os::set_priority because it expects Java
782 // priorities and we are *explicitly* using OS priorities so that it's
783 // possible to set the compiler thread priority higher than any Java
784 // thread.
785
786 int native_prio = CompilerThreadPriority;
787 if (native_prio == -1) {
788 if (UseCriticalCompilerThreadPriority) {
789 native_prio = os::java_to_os_priority[CriticalPriority];
790 } else {
791 native_prio = os::java_to_os_priority[NearMaxPriority];
792 }
793 }
794 os::set_native_priority(thread, native_prio);
795
796 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
797
798 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
799 if (comp != NULL) {
800 thread->as_CompilerThread()->set_compiler(comp);
801 }
802 Threads::add(thread);
803 Thread::start(thread);
804 }
805 }
806
807 // First release lock before aborting VM.
808 if (thread == NULL || thread->osthread() == NULL) {
809 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
810 if (thread != NULL) {
811 thread->smr_delete();
812 }
813 return NULL;
814 }
815 vm_exit_during_initialization("java.lang.OutOfMemoryError",
816 os::native_thread_creation_failed_msg());
817 }
818
819 // Let go of Threads_lock before yielding
820 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
821
822 return thread;
823 }
824
825
826 void CompileBroker::init_compiler_sweeper_threads() {
827 EXCEPTION_MARK;
828 #if !defined(ZERO)
829 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
830 #endif // !ZERO
831 // Initialize the compilation queue
832 if (_c2_count > 0) {
833 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
834 _c2_compile_queue = new CompileQueue(name);
835 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
836 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
837 }
838 if (_c1_count > 0) {
839 _c1_compile_queue = new CompileQueue("C1 compile queue");
840 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
841 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
842 }
843
844 char name_buffer[256];
845
846 for (int i = 0; i < _c2_count; i++) {
847 // Create a name for our thread.
848 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
849 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
850 jobject thread_handle = JNIHandles::make_global(thread_oop);
851 _compiler2_objects[i] = thread_handle;
852 _compiler2_logs[i] = NULL;
853
854 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
855 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK);
856 assert(ct != NULL, "should have been handled for initial thread");
857 _compilers[1]->set_num_compiler_threads(i + 1);
858 if (TraceCompilerThreads) {
859 ResourceMark rm;
860 MutexLocker mu(Threads_lock);
861 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
862 }
863 }
864 }
865
866 for (int i = 0; i < _c1_count; i++) {
867 // Create a name for our thread.
868 sprintf(name_buffer, "C1 CompilerThread%d", i);
869 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
870 jobject thread_handle = JNIHandles::make_global(thread_oop);
871 _compiler1_objects[i] = thread_handle;
872 _compiler1_logs[i] = NULL;
873
874 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
875 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK);
876 assert(ct != NULL, "should have been handled for initial thread");
877 _compilers[0]->set_num_compiler_threads(i + 1);
878 if (TraceCompilerThreads) {
879 ResourceMark rm;
880 MutexLocker mu(Threads_lock);
881 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
882 }
883 }
884 }
885
886 if (UsePerfData) {
887 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
888 }
889
890 if (MethodFlushing) {
891 // Initialize the sweeper thread
892 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
893 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
894 make_thread(thread_handle, NULL, NULL, CHECK);
895 }
896 }
897
898 void CompileBroker::possibly_add_compiler_threads() {
899 EXCEPTION_MARK;
900
901 julong available_memory = os::available_memory();
902 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
903 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
904 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
905
906 // Only do attempt to start additional threads if the lock is free.
907 if (!CompileThread_lock->try_lock()) return;
908
909 if (_c2_compile_queue != NULL) {
910 int old_c2_count = _compilers[1]->num_compiler_threads();
911 int new_c2_count = MIN4(_c2_count,
912 _c2_compile_queue->size() / 2,
913 (int)(available_memory / (200*M)),
914 (int)(available_cc_np / (128*K)));
915
916 for (int i = old_c2_count; i < new_c2_count; i++) {
917 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK);
918 if (ct == NULL) break;
919 _compilers[1]->set_num_compiler_threads(i + 1);
920 if (TraceCompilerThreads) {
921 ResourceMark rm;
922 MutexLocker mu(Threads_lock);
923 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
924 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
925 }
926 }
927 }
928
929 if (_c1_compile_queue != NULL) {
930 int old_c1_count = _compilers[0]->num_compiler_threads();
931 int new_c1_count = MIN4(_c1_count,
932 _c1_compile_queue->size() / 4,
933 (int)(available_memory / (100*M)),
934 (int)(available_cc_p / (128*K)));
935
936 for (int i = old_c1_count; i < new_c1_count; i++) {
937 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK);
938 if (ct == NULL) break;
939 _compilers[0]->set_num_compiler_threads(i + 1);
940 if (TraceCompilerThreads) {
941 ResourceMark rm;
942 MutexLocker mu(Threads_lock);
943 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
944 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
945 }
946 }
947 }
948
949 CompileThread_lock->unlock();
950 }
951
952
953 /**
954 * Set the methods on the stack as on_stack so that redefine classes doesn't
955 * reclaim them. This method is executed at a safepoint.
956 */
957 void CompileBroker::mark_on_stack() {
958 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
959 // Since we are at a safepoint, we do not need a lock to access
960 // the compile queues.
961 if (_c2_compile_queue != NULL) {
962 _c2_compile_queue->mark_on_stack();
963 }
964 if (_c1_compile_queue != NULL) {
965 _c1_compile_queue->mark_on_stack();
966 }
967 }
968
969 // ------------------------------------------------------------------
970 // CompileBroker::compile_method
971 //
972 // Request compilation of a method.
973 void CompileBroker::compile_method_base(const methodHandle& method,
974 int osr_bci,
975 int comp_level,
976 const methodHandle& hot_method,
977 int hot_count,
978 CompileTask::CompileReason compile_reason,
979 bool blocking,
980 Thread* thread) {
981 guarantee(!method->is_abstract(), "cannot compile abstract methods");
982 assert(method->method_holder()->is_instance_klass(),
983 "sanity check");
984 assert(!method->method_holder()->is_not_initialized(),
985 "method holder must be initialized");
986 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
987
988 if (CIPrintRequests) {
989 tty->print("request: ");
990 method->print_short_name(tty);
991 if (osr_bci != InvocationEntryBci) {
992 tty->print(" osr_bci: %d", osr_bci);
993 }
994 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
995 if (!hot_method.is_null()) {
996 tty->print(" hot: ");
997 if (hot_method() != method()) {
998 hot_method->print_short_name(tty);
999 } else {
1000 tty->print("yes");
1001 }
1002 }
1003 tty->cr();
1004 }
1005
1006 // A request has been made for compilation. Before we do any
1007 // real work, check to see if the method has been compiled
1008 // in the meantime with a definitive result.
1009 if (compilation_is_complete(method, osr_bci, comp_level)) {
1010 return;
1011 }
1012
1013 #ifndef PRODUCT
1014 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1015 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1016 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1017 return;
1018 }
1019 }
1020 #endif
1021
1022 // If this method is already in the compile queue, then
1023 // we do not block the current thread.
1024 if (compilation_is_in_queue(method)) {
1025 // We may want to decay our counter a bit here to prevent
1026 // multiple denied requests for compilation. This is an
1027 // open compilation policy issue. Note: The other possibility,
1028 // in the case that this is a blocking compile request, is to have
1029 // all subsequent blocking requesters wait for completion of
1030 // ongoing compiles. Note that in this case we'll need a protocol
1031 // for freeing the associated compile tasks. [Or we could have
1032 // a single static monitor on which all these waiters sleep.]
1033 return;
1034 }
1035
1036 if (TieredCompilation) {
1037 // Tiered policy requires MethodCounters to exist before adding a method to
1038 // the queue. Create if we don't have them yet.
1039 method->get_method_counters(thread);
1040 }
1041
1042 // Outputs from the following MutexLocker block:
1043 CompileTask* task = NULL;
1044 CompileQueue* queue = compile_queue(comp_level);
1045
1046 // Acquire our lock.
1047 {
1048 MutexLocker locker(MethodCompileQueue_lock, thread);
1049
1050 // Make sure the method has not slipped into the queues since
1051 // last we checked; note that those checks were "fast bail-outs".
1052 // Here we need to be more careful, see 14012000 below.
1053 if (compilation_is_in_queue(method)) {
1054 return;
1055 }
1056
1057 // We need to check again to see if the compilation has
1058 // completed. A previous compilation may have registered
1059 // some result.
1060 if (compilation_is_complete(method, osr_bci, comp_level)) {
1061 return;
1062 }
1063
1064 // We now know that this compilation is not pending, complete,
1065 // or prohibited. Assign a compile_id to this compilation
1066 // and check to see if it is in our [Start..Stop) range.
1067 int compile_id = assign_compile_id(method, osr_bci);
1068 if (compile_id == 0) {
1069 // The compilation falls outside the allowed range.
1070 return;
1071 }
1072
1073 #if INCLUDE_JVMCI
1074 if (UseJVMCICompiler) {
1075 if (blocking) {
1076 // Don't allow blocking compiles for requests triggered by JVMCI.
1077 if (thread->is_Compiler_thread()) {
1078 blocking = false;
1079 }
1080
1081 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1082 vframeStream vfst((JavaThread*) thread);
1083 for (; !vfst.at_end(); vfst.next()) {
1084 if (vfst.method()->is_static_initializer() ||
1085 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1086 vfst.method()->name() == vmSymbols::loadClass_name())) {
1087 blocking = false;
1088 break;
1089 }
1090 }
1091
1092 // Don't allow blocking compilation requests to JVMCI
1093 // if JVMCI itself is not yet initialized
1094 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
1095 blocking = false;
1096 }
1097
1098 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1099 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1100 // such as the DestroyJavaVM thread.
1101 if (JVMCIRuntime::shutdown_called()) {
1102 blocking = false;
1103 }
1104 }
1105 }
1106 #endif // INCLUDE_JVMCI
1107
1108 // We will enter the compilation in the queue.
1109 // 14012000: Note that this sets the queued_for_compile bits in
1110 // the target method. We can now reason that a method cannot be
1111 // queued for compilation more than once, as follows:
1112 // Before a thread queues a task for compilation, it first acquires
1113 // the compile queue lock, then checks if the method's queued bits
1114 // are set or it has already been compiled. Thus there can not be two
1115 // instances of a compilation task for the same method on the
1116 // compilation queue. Consider now the case where the compilation
1117 // thread has already removed a task for that method from the queue
1118 // and is in the midst of compiling it. In this case, the
1119 // queued_for_compile bits must be set in the method (and these
1120 // will be visible to the current thread, since the bits were set
1121 // under protection of the compile queue lock, which we hold now.
1122 // When the compilation completes, the compiler thread first sets
1123 // the compilation result and then clears the queued_for_compile
1124 // bits. Neither of these actions are protected by a barrier (or done
1125 // under the protection of a lock), so the only guarantee we have
1126 // (on machines with TSO (Total Store Order)) is that these values
1127 // will update in that order. As a result, the only combinations of
1128 // these bits that the current thread will see are, in temporal order:
1129 // <RESULT, QUEUE> :
1130 // <0, 1> : in compile queue, but not yet compiled
1131 // <1, 1> : compiled but queue bit not cleared
1132 // <1, 0> : compiled and queue bit cleared
1133 // Because we first check the queue bits then check the result bits,
1134 // we are assured that we cannot introduce a duplicate task.
1135 // Note that if we did the tests in the reverse order (i.e. check
1136 // result then check queued bit), we could get the result bit before
1137 // the compilation completed, and the queue bit after the compilation
1138 // completed, and end up introducing a "duplicate" (redundant) task.
1139 // In that case, the compiler thread should first check if a method
1140 // has already been compiled before trying to compile it.
1141 // NOTE: in the event that there are multiple compiler threads and
1142 // there is de-optimization/recompilation, things will get hairy,
1143 // and in that case it's best to protect both the testing (here) of
1144 // these bits, and their updating (here and elsewhere) under a
1145 // common lock.
1146 task = create_compile_task(queue,
1147 compile_id, method,
1148 osr_bci, comp_level,
1149 hot_method, hot_count, compile_reason,
1150 blocking);
1151 }
1152
1153 if (blocking) {
1154 wait_for_completion(task);
1155 }
1156 }
1157
1158 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1159 int comp_level,
1160 const methodHandle& hot_method, int hot_count,
1161 CompileTask::CompileReason compile_reason,
1162 Thread* THREAD) {
1163 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1164 if (!_initialized || comp_level == CompLevel_none) {
1165 return NULL;
1166 }
1167
1168 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1169 assert(comp != NULL, "Ensure we have a compiler");
1170
1171 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1172 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1173 DirectivesStack::release(directive);
1174 return nm;
1175 }
1176
1177 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1178 int comp_level,
1179 const methodHandle& hot_method, int hot_count,
1180 CompileTask::CompileReason compile_reason,
1181 DirectiveSet* directive,
1182 Thread* THREAD) {
1183
1184 // make sure arguments make sense
1185 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1186 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1187 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1188 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1189 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1190 // allow any levels for WhiteBox
1191 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1192 // return quickly if possible
1193
1194 // lock, make sure that the compilation
1195 // isn't prohibited in a straightforward way.
1196 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1197 if (comp == NULL || !comp->can_compile_method(method) ||
1198 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1199 return NULL;
1200 }
1201
1202 #if INCLUDE_JVMCI
1203 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1204 return NULL;
1205 }
1206 #endif
1207
1208 if (osr_bci == InvocationEntryBci) {
1209 // standard compilation
1210 CompiledMethod* method_code = method->code();
1211 if (method_code != NULL && method_code->is_nmethod()) {
1212 if (compilation_is_complete(method, osr_bci, comp_level)) {
1213 return (nmethod*) method_code;
1214 }
1215 }
1216 if (method->is_not_compilable(comp_level)) {
1217 return NULL;
1218 }
1219 } else {
1220 // osr compilation
1221 #ifndef TIERED
1222 // seems like an assert of dubious value
1223 assert(comp_level == CompLevel_highest_tier,
1224 "all OSR compiles are assumed to be at a single compilation level");
1225 #endif // TIERED
1226 // We accept a higher level osr method
1227 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1228 if (nm != NULL) return nm;
1229 if (method->is_not_osr_compilable(comp_level)) return NULL;
1230 }
1231
1232 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1233 // some prerequisites that are compiler specific
1234 if (comp->is_c2()) {
1235 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1236 // Resolve all classes seen in the signature of the method
1237 // we are compiling.
1238 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1239 }
1240
1241 // If the method is native, do the lookup in the thread requesting
1242 // the compilation. Native lookups can load code, which is not
1243 // permitted during compilation.
1244 //
1245 // Note: A native method implies non-osr compilation which is
1246 // checked with an assertion at the entry of this method.
1247 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1248 bool in_base_library;
1249 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1250 if (HAS_PENDING_EXCEPTION) {
1251 // In case of an exception looking up the method, we just forget
1252 // about it. The interpreter will kick-in and throw the exception.
1253 method->set_not_compilable(); // implies is_not_osr_compilable()
1254 CLEAR_PENDING_EXCEPTION;
1255 return NULL;
1256 }
1257 assert(method->has_native_function(), "must have native code by now");
1258 }
1259
1260 // RedefineClasses() has replaced this method; just return
1261 if (method->is_old()) {
1262 return NULL;
1263 }
1264
1265 // JVMTI -- post_compile_event requires jmethod_id() that may require
1266 // a lock the compiling thread can not acquire. Prefetch it here.
1267 if (JvmtiExport::should_post_compiled_method_load()) {
1268 method->jmethod_id();
1269 }
1270
1271 // do the compilation
1272 if (method->is_native()) {
1273 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1274 // The following native methods:
1275 //
1276 // java.lang.Float.intBitsToFloat
1277 // java.lang.Float.floatToRawIntBits
1278 // java.lang.Double.longBitsToDouble
1279 // java.lang.Double.doubleToRawLongBits
1280 //
1281 // are called through the interpreter even if interpreter native stubs
1282 // are not preferred (i.e., calling through adapter handlers is preferred).
1283 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1284 // if the version of the methods from the native libraries is called.
1285 // As the interpreter and the C2-intrinsified version of the methods preserves
1286 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1287 if ((UseSSE >= 1 &&
1288 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1289 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1290 (UseSSE >= 2 &&
1291 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1292 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1293 return NULL;
1294 }
1295
1296 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1297 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1298 //
1299 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1300 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1301 AdapterHandlerLibrary::create_native_wrapper(method);
1302 } else {
1303 return NULL;
1304 }
1305 } else {
1306 // If the compiler is shut off due to code cache getting full
1307 // fail out now so blocking compiles dont hang the java thread
1308 if (!should_compile_new_jobs()) {
1309 CompilationPolicy::policy()->delay_compilation(method());
1310 return NULL;
1311 }
1312 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1313 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1314 }
1315
1316 // return requested nmethod
1317 // We accept a higher level osr method
1318 if (osr_bci == InvocationEntryBci) {
1319 CompiledMethod* code = method->code();
1320 if (code == NULL) {
1321 return (nmethod*) code;
1322 } else {
1323 return code->as_nmethod_or_null();
1324 }
1325 }
1326 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1327 }
1328
1329
1330 // ------------------------------------------------------------------
1331 // CompileBroker::compilation_is_complete
1332 //
1333 // See if compilation of this method is already complete.
1334 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1335 int osr_bci,
1336 int comp_level) {
1337 bool is_osr = (osr_bci != standard_entry_bci);
1338 if (is_osr) {
1339 if (method->is_not_osr_compilable(comp_level)) {
1340 return true;
1341 } else {
1342 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1343 return (result != NULL);
1344 }
1345 } else {
1346 if (method->is_not_compilable(comp_level)) {
1347 return true;
1348 } else {
1349 CompiledMethod* result = method->code();
1350 if (result == NULL) return false;
1351 return comp_level == result->comp_level();
1352 }
1353 }
1354 }
1355
1356
1357 /**
1358 * See if this compilation is already requested.
1359 *
1360 * Implementation note: there is only a single "is in queue" bit
1361 * for each method. This means that the check below is overly
1362 * conservative in the sense that an osr compilation in the queue
1363 * will block a normal compilation from entering the queue (and vice
1364 * versa). This can be remedied by a full queue search to disambiguate
1365 * cases. If it is deemed profitable, this may be done.
1366 */
1367 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1368 return method->queued_for_compilation();
1369 }
1370
1371 // ------------------------------------------------------------------
1372 // CompileBroker::compilation_is_prohibited
1373 //
1374 // See if this compilation is not allowed.
1375 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1376 bool is_native = method->is_native();
1377 // Some compilers may not support the compilation of natives.
1378 AbstractCompiler *comp = compiler(comp_level);
1379 if (is_native &&
1380 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1381 method->set_not_compilable_quietly(comp_level);
1382 return true;
1383 }
1384
1385 bool is_osr = (osr_bci != standard_entry_bci);
1386 // Some compilers may not support on stack replacement.
1387 if (is_osr &&
1388 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1389 method->set_not_osr_compilable(comp_level);
1390 return true;
1391 }
1392
1393 // The method may be explicitly excluded by the user.
1394 double scale;
1395 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1396 bool quietly = CompilerOracle::should_exclude_quietly();
1397 if (PrintCompilation && !quietly) {
1398 // This does not happen quietly...
1399 ResourceMark rm;
1400 tty->print("### Excluding %s:%s",
1401 method->is_native() ? "generation of native wrapper" : "compile",
1402 (method->is_static() ? " static" : ""));
1403 method->print_short_name(tty);
1404 tty->cr();
1405 }
1406 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1407 }
1408
1409 return false;
1410 }
1411
1412 /**
1413 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1414 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1415 * The function also allows to generate separate compilation IDs for OSR compilations.
1416 */
1417 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1418 #ifdef ASSERT
1419 bool is_osr = (osr_bci != standard_entry_bci);
1420 int id;
1421 if (method->is_native()) {
1422 assert(!is_osr, "can't be osr");
1423 // Adapters, native wrappers and method handle intrinsics
1424 // should be generated always.
1425 return Atomic::add(1, &_compilation_id);
1426 } else if (CICountOSR && is_osr) {
1427 id = Atomic::add(1, &_osr_compilation_id);
1428 if (CIStartOSR <= id && id < CIStopOSR) {
1429 return id;
1430 }
1431 } else {
1432 id = Atomic::add(1, &_compilation_id);
1433 if (CIStart <= id && id < CIStop) {
1434 return id;
1435 }
1436 }
1437
1438 // Method was not in the appropriate compilation range.
1439 method->set_not_compilable_quietly();
1440 return 0;
1441 #else
1442 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1443 // only _compilation_id is incremented.
1444 return Atomic::add(1, &_compilation_id);
1445 #endif
1446 }
1447
1448 // ------------------------------------------------------------------
1449 // CompileBroker::assign_compile_id_unlocked
1450 //
1451 // Public wrapper for assign_compile_id that acquires the needed locks
1452 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1453 MutexLocker locker(MethodCompileQueue_lock, thread);
1454 return assign_compile_id(method, osr_bci);
1455 }
1456
1457 // ------------------------------------------------------------------
1458 // CompileBroker::preload_classes
1459 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1460 // Move this code over from c1_Compiler.cpp
1461 ShouldNotReachHere();
1462 }
1463
1464
1465 // ------------------------------------------------------------------
1466 // CompileBroker::create_compile_task
1467 //
1468 // Create a CompileTask object representing the current request for
1469 // compilation. Add this task to the queue.
1470 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1471 int compile_id,
1472 const methodHandle& method,
1473 int osr_bci,
1474 int comp_level,
1475 const methodHandle& hot_method,
1476 int hot_count,
1477 CompileTask::CompileReason compile_reason,
1478 bool blocking) {
1479 CompileTask* new_task = CompileTask::allocate();
1480 new_task->initialize(compile_id, method, osr_bci, comp_level,
1481 hot_method, hot_count, compile_reason,
1482 blocking);
1483 queue->add(new_task);
1484 return new_task;
1485 }
1486
1487 #if INCLUDE_JVMCI
1488 // The number of milliseconds to wait before checking if
1489 // JVMCI compilation has made progress.
1490 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1491
1492 // The number of JVMCI compilation progress checks that must fail
1493 // before unblocking a thread waiting for a blocking compilation.
1494 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1495
1496 /**
1497 * Waits for a JVMCI compiler to complete a given task. This thread
1498 * waits until either the task completes or it sees no JVMCI compilation
1499 * progress for N consecutive milliseconds where N is
1500 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1501 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1502 *
1503 * @return true if this thread needs to free/recycle the task
1504 */
1505 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1506 MutexLocker waiter(task->lock(), thread);
1507 int progress_wait_attempts = 0;
1508 int methods_compiled = jvmci->methods_compiled();
1509 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1510 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1511 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1512
1513 bool progress;
1514 if (jvmci_compiler_thread != NULL) {
1515 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1516 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1517 !jvmci_compiler_thread->is_external_suspend();
1518 } else {
1519 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1520 // that all JVMCI compiler threads are blocked on. We use the counter for
1521 // successful JVMCI compilations to determine whether JVMCI compilation
1522 // is still making progress through the JVMCI compiler queue.
1523 progress = jvmci->methods_compiled() != methods_compiled;
1524 }
1525
1526 if (!progress) {
1527 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1528 if (PrintCompilation) {
1529 task->print(tty, "wait for blocking compilation timed out");
1530 }
1531 break;
1532 }
1533 } else {
1534 progress_wait_attempts = 0;
1535 if (jvmci_compiler_thread == NULL) {
1536 methods_compiled = jvmci->methods_compiled();
1537 }
1538 }
1539 }
1540 task->clear_waiter();
1541 return task->is_complete();
1542 }
1543 #endif
1544
1545 /**
1546 * Wait for the compilation task to complete.
1547 */
1548 void CompileBroker::wait_for_completion(CompileTask* task) {
1549 if (CIPrintCompileQueue) {
1550 ttyLocker ttyl;
1551 tty->print_cr("BLOCKING FOR COMPILE");
1552 }
1553
1554 assert(task->is_blocking(), "can only wait on blocking task");
1555
1556 JavaThread* thread = JavaThread::current();
1557 thread->set_blocked_on_compilation(true);
1558
1559 methodHandle method(thread, task->method());
1560 bool free_task;
1561 #if INCLUDE_JVMCI
1562 AbstractCompiler* comp = compiler(task->comp_level());
1563 if (comp->is_jvmci()) {
1564 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1565 } else
1566 #endif
1567 {
1568 MutexLocker waiter(task->lock(), thread);
1569 free_task = true;
1570 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1571 task->lock()->wait();
1572 }
1573 }
1574
1575 thread->set_blocked_on_compilation(false);
1576 if (free_task) {
1577 if (is_compilation_disabled_forever()) {
1578 CompileTask::free(task);
1579 return;
1580 }
1581
1582 // It is harmless to check this status without the lock, because
1583 // completion is a stable property (until the task object is recycled).
1584 assert(task->is_complete(), "Compilation should have completed");
1585 assert(task->code_handle() == NULL, "must be reset");
1586
1587 // By convention, the waiter is responsible for recycling a
1588 // blocking CompileTask. Since there is only one waiter ever
1589 // waiting on a CompileTask, we know that no one else will
1590 // be using this CompileTask; we can free it.
1591 CompileTask::free(task);
1592 }
1593 }
1594
1595 /**
1596 * Initialize compiler thread(s) + compiler object(s). The postcondition
1597 * of this function is that the compiler runtimes are initialized and that
1598 * compiler threads can start compiling.
1599 */
1600 bool CompileBroker::init_compiler_runtime() {
1601 CompilerThread* thread = CompilerThread::current();
1602 AbstractCompiler* comp = thread->compiler();
1603 // Final sanity check - the compiler object must exist
1604 guarantee(comp != NULL, "Compiler object must exist");
1605
1606 int system_dictionary_modification_counter;
1607 {
1608 MutexLocker locker(Compile_lock, thread);
1609 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1610 }
1611
1612 {
1613 // Must switch to native to allocate ci_env
1614 ThreadToNativeFromVM ttn(thread);
1615 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1616 // Cache Jvmti state
1617 ci_env.cache_jvmti_state();
1618 // Cache DTrace flags
1619 ci_env.cache_dtrace_flags();
1620
1621 // Switch back to VM state to do compiler initialization
1622 ThreadInVMfromNative tv(thread);
1623 ResetNoHandleMark rnhm;
1624
1625 // Perform per-thread and global initializations
1626 comp->initialize();
1627 }
1628
1629 if (comp->is_failed()) {
1630 disable_compilation_forever();
1631 // If compiler initialization failed, no compiler thread that is specific to a
1632 // particular compiler runtime will ever start to compile methods.
1633 shutdown_compiler_runtime(comp, thread);
1634 return false;
1635 }
1636
1637 // C1 specific check
1638 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1639 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1640 return false;
1641 }
1642
1643 return true;
1644 }
1645
1646 /**
1647 * If C1 and/or C2 initialization failed, we shut down all compilation.
1648 * We do this to keep things simple. This can be changed if it ever turns
1649 * out to be a problem.
1650 */
1651 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1652 // Free buffer blob, if allocated
1653 if (thread->get_buffer_blob() != NULL) {
1654 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1655 CodeCache::free(thread->get_buffer_blob());
1656 }
1657
1658 if (comp->should_perform_shutdown()) {
1659 // There are two reasons for shutting down the compiler
1660 // 1) compiler runtime initialization failed
1661 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1662 warning("%s initialization failed. Shutting down all compilers", comp->name());
1663
1664 // Only one thread per compiler runtime object enters here
1665 // Set state to shut down
1666 comp->set_shut_down();
1667
1668 // Delete all queued compilation tasks to make compiler threads exit faster.
1669 if (_c1_compile_queue != NULL) {
1670 _c1_compile_queue->free_all();
1671 }
1672
1673 if (_c2_compile_queue != NULL) {
1674 _c2_compile_queue->free_all();
1675 }
1676
1677 // Set flags so that we continue execution with using interpreter only.
1678 UseCompiler = false;
1679 UseInterpreter = true;
1680
1681 // We could delete compiler runtimes also. However, there are references to
1682 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1683 // fail. This can be done later if necessary.
1684 }
1685 }
1686
1687 /**
1688 * Helper function to create new or reuse old CompileLog.
1689 */
1690 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1691 if (!LogCompilation) return NULL;
1692
1693 AbstractCompiler *compiler = ct->compiler();
1694 bool c1 = compiler->is_c1();
1695 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1696 assert(compiler_objects != NULL, "must be initialized at this point");
1697 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1698 assert(logs != NULL, "must be initialized at this point");
1699 int count = c1 ? _c1_count : _c2_count;
1700
1701 // Find Compiler number by its threadObj.
1702 oop compiler_obj = ct->threadObj();
1703 int compiler_number = 0;
1704 bool found = false;
1705 for (; compiler_number < count; compiler_number++) {
1706 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1707 found = true;
1708 break;
1709 }
1710 }
1711 assert(found, "Compiler must exist at this point");
1712
1713 // Determine pointer for this thread's log.
1714 CompileLog** log_ptr = &logs[compiler_number];
1715
1716 // Return old one if it exists.
1717 CompileLog* log = *log_ptr;
1718 if (log != NULL) {
1719 ct->init_log(log);
1720 return log;
1721 }
1722
1723 // Create a new one and remember it.
1724 init_compiler_thread_log();
1725 log = ct->log();
1726 *log_ptr = log;
1727 return log;
1728 }
1729
1730 // ------------------------------------------------------------------
1731 // CompileBroker::compiler_thread_loop
1732 //
1733 // The main loop run by a CompilerThread.
1734 void CompileBroker::compiler_thread_loop() {
1735 CompilerThread* thread = CompilerThread::current();
1736 CompileQueue* queue = thread->queue();
1737 // For the thread that initializes the ciObjectFactory
1738 // this resource mark holds all the shared objects
1739 ResourceMark rm;
1740
1741 // First thread to get here will initialize the compiler interface
1742
1743 {
1744 ASSERT_IN_VM;
1745 MutexLocker only_one (CompileThread_lock, thread);
1746 if (!ciObjectFactory::is_initialized()) {
1747 ciObjectFactory::initialize();
1748 }
1749 }
1750
1751 // Open a log.
1752 CompileLog* log = get_log(thread);
1753 if (log != NULL) {
1754 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1755 thread->name(),
1756 os::current_thread_id(),
1757 os::current_process_id());
1758 log->stamp();
1759 log->end_elem();
1760 }
1761
1762 // If compiler thread/runtime initialization fails, exit the compiler thread
1763 if (!init_compiler_runtime()) {
1764 return;
1765 }
1766
1767 thread->start_idle_timer();
1768
1769 // Poll for new compilation tasks as long as the JVM runs. Compilation
1770 // should only be disabled if something went wrong while initializing the
1771 // compiler runtimes. This, in turn, should not happen. The only known case
1772 // when compiler runtime initialization fails is if there is not enough free
1773 // space in the code cache to generate the necessary stubs, etc.
1774 while (!is_compilation_disabled_forever()) {
1775 // We need this HandleMark to avoid leaking VM handles.
1776 HandleMark hm(thread);
1777
1778 CompileTask* task = queue->get();
1779 if (task == NULL) {
1780 if (UseDynamicNumberOfCompilerThreads) {
1781 // Access compiler_count under lock to enforce consistency.
1782 MutexLocker only_one(CompileThread_lock);
1783 if (can_remove(thread, true)) {
1784 if (TraceCompilerThreads) {
1785 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1786 thread->name(), thread->idle_time_millis());
1787 }
1788 // Free buffer blob, if allocated
1789 if (thread->get_buffer_blob() != NULL) {
1790 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1791 CodeCache::free(thread->get_buffer_blob());
1792 }
1793 return; // Stop this thread.
1794 }
1795 }
1796 } else {
1797 // Assign the task to the current thread. Mark this compilation
1798 // thread as active for the profiler.
1799 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1800 // occurs after fetching the compile task off the queue.
1801 CompileTaskWrapper ctw(task);
1802 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1803 task->set_code_handle(&result_handle);
1804 methodHandle method(thread, task->method());
1805
1806 // Never compile a method if breakpoints are present in it
1807 if (method()->number_of_breakpoints() == 0) {
1808 // Compile the method.
1809 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1810 invoke_compiler_on_method(task);
1811 thread->start_idle_timer();
1812 } else {
1813 // After compilation is disabled, remove remaining methods from queue
1814 method->clear_queued_for_compilation();
1815 task->set_failure_reason("compilation is disabled");
1816 }
1817 }
1818
1819 if (UseDynamicNumberOfCompilerThreads) {
1820 possibly_add_compiler_threads();
1821 }
1822 }
1823 }
1824
1825 // Shut down compiler runtime
1826 shutdown_compiler_runtime(thread->compiler(), thread);
1827 }
1828
1829 // ------------------------------------------------------------------
1830 // CompileBroker::init_compiler_thread_log
1831 //
1832 // Set up state required by +LogCompilation.
1833 void CompileBroker::init_compiler_thread_log() {
1834 CompilerThread* thread = CompilerThread::current();
1835 char file_name[4*K];
1836 FILE* fp = NULL;
1837 intx thread_id = os::current_thread_id();
1838 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1839 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1840 if (dir == NULL) {
1841 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1842 thread_id, os::current_process_id());
1843 } else {
1844 jio_snprintf(file_name, sizeof(file_name),
1845 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1846 os::file_separator(), thread_id, os::current_process_id());
1847 }
1848
1849 fp = fopen(file_name, "wt");
1850 if (fp != NULL) {
1851 if (LogCompilation && Verbose) {
1852 tty->print_cr("Opening compilation log %s", file_name);
1853 }
1854 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1855 if (log == NULL) {
1856 fclose(fp);
1857 return;
1858 }
1859 thread->init_log(log);
1860
1861 if (xtty != NULL) {
1862 ttyLocker ttyl;
1863 // Record any per thread log files
1864 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1865 }
1866 return;
1867 }
1868 }
1869 warning("Cannot open log file: %s", file_name);
1870 }
1871
1872 void CompileBroker::log_metaspace_failure() {
1873 const char* message = "some methods may not be compiled because metaspace "
1874 "is out of memory";
1875 if (_compilation_log != NULL) {
1876 _compilation_log->log_metaspace_failure(message);
1877 }
1878 if (PrintCompilation) {
1879 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1880 }
1881 }
1882
1883
1884 // ------------------------------------------------------------------
1885 // CompileBroker::set_should_block
1886 //
1887 // Set _should_block.
1888 // Call this from the VM, with Threads_lock held and a safepoint requested.
1889 void CompileBroker::set_should_block() {
1890 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1891 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1892 #ifndef PRODUCT
1893 if (PrintCompilation && (Verbose || WizardMode))
1894 tty->print_cr("notifying compiler thread pool to block");
1895 #endif
1896 _should_block = true;
1897 }
1898
1899 // ------------------------------------------------------------------
1900 // CompileBroker::maybe_block
1901 //
1902 // Call this from the compiler at convenient points, to poll for _should_block.
1903 void CompileBroker::maybe_block() {
1904 if (_should_block) {
1905 #ifndef PRODUCT
1906 if (PrintCompilation && (Verbose || WizardMode))
1907 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1908 #endif
1909 ThreadInVMfromNative tivfn(JavaThread::current());
1910 }
1911 }
1912
1913 // wrapper for CodeCache::print_summary()
1914 static void codecache_print(bool detailed)
1915 {
1916 ResourceMark rm;
1917 stringStream s;
1918 // Dump code cache into a buffer before locking the tty,
1919 {
1920 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1921 CodeCache::print_summary(&s, detailed);
1922 }
1923 ttyLocker ttyl;
1924 tty->print("%s", s.as_string());
1925 }
1926
1927 // wrapper for CodeCache::print_summary() using outputStream
1928 static void codecache_print(outputStream* out, bool detailed) {
1929 ResourceMark rm;
1930 stringStream s;
1931
1932 // Dump code cache into a buffer
1933 {
1934 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1935 CodeCache::print_summary(&s, detailed);
1936 }
1937
1938 char* remaining_log = s.as_string();
1939 while (*remaining_log != '\0') {
1940 char* eol = strchr(remaining_log, '\n');
1941 if (eol == NULL) {
1942 out->print_cr("%s", remaining_log);
1943 remaining_log = remaining_log + strlen(remaining_log);
1944 } else {
1945 *eol = '\0';
1946 out->print_cr("%s", remaining_log);
1947 remaining_log = eol + 1;
1948 }
1949 }
1950 }
1951
1952 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1953 int compilable, const char* failure_reason) {
1954 if (success) {
1955 task->mark_success();
1956 if (ci_env != NULL) {
1957 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1958 }
1959 if (_compilation_log != NULL) {
1960 nmethod* code = task->code();
1961 if (code != NULL) {
1962 _compilation_log->log_nmethod(thread, code);
1963 }
1964 }
1965 } else if (AbortVMOnCompilationFailure) {
1966 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1967 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
1968 }
1969 if (compilable == ciEnv::MethodCompilable_never) {
1970 fatal("Never compilable: %s", failure_reason);
1971 }
1972 }
1973 // simulate crash during compilation
1974 assert(task->compile_id() != CICrashAt, "just as planned");
1975 }
1976
1977 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1978 assert(event != NULL, "invariant");
1979 assert(event->should_commit(), "invariant");
1980 event->set_method(task->method());
1981 event->set_compileId(task->compile_id());
1982 event->set_compileLevel(task->comp_level());
1983 event->set_succeded(task->is_success());
1984 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1985 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1986 event->set_inlinedBytes(task->num_inlined_bytecodes());
1987 event->commit();
1988 }
1989
1990 int DirectivesStack::_depth = 0;
1991 CompilerDirectives* DirectivesStack::_top = NULL;
1992 CompilerDirectives* DirectivesStack::_bottom = NULL;
1993
1994 // ------------------------------------------------------------------
1995 // CompileBroker::invoke_compiler_on_method
1996 //
1997 // Compile a method.
1998 //
1999 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2000 task->print_ul();
2001 if (PrintCompilation) {
2002 ResourceMark rm;
2003 task->print_tty();
2004 }
2005 elapsedTimer time;
2006
2007 CompilerThread* thread = CompilerThread::current();
2008 ResourceMark rm(thread);
2009
2010 if (LogEvents) {
2011 _compilation_log->log_compile(thread, task);
2012 }
2013
2014 // Common flags.
2015 uint compile_id = task->compile_id();
2016 int osr_bci = task->osr_bci();
2017 bool is_osr = (osr_bci != standard_entry_bci);
2018 bool should_log = (thread->log() != NULL);
2019 bool should_break = false;
2020 const int task_level = task->comp_level();
2021 AbstractCompiler* comp = task->compiler();
2022
2023 DirectiveSet* directive;
2024 {
2025 // create the handle inside it's own block so it can't
2026 // accidentally be referenced once the thread transitions to
2027 // native. The NoHandleMark before the transition should catch
2028 // any cases where this occurs in the future.
2029 methodHandle method(thread, task->method());
2030 assert(!method->is_native(), "no longer compile natives");
2031
2032 // Look up matching directives
2033 directive = DirectivesStack::getMatchingDirective(method, comp);
2034
2035 // Save information about this method in case of failure.
2036 set_last_compile(thread, method, is_osr, task_level);
2037
2038 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2039 }
2040
2041 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2042 if (should_log && !directive->LogOption) {
2043 should_log = false;
2044 }
2045
2046 // Allocate a new set of JNI handles.
2047 push_jni_handle_block();
2048 Method* target_handle = task->method();
2049 int compilable = ciEnv::MethodCompilable;
2050 const char* failure_reason = NULL;
2051 bool failure_reason_on_C_heap = false;
2052 const char* retry_message = NULL;
2053
2054 int system_dictionary_modification_counter;
2055 {
2056 MutexLocker locker(Compile_lock, thread);
2057 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
2058 }
2059
2060 #if INCLUDE_JVMCI
2061 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2062 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2063
2064 TraceTime t1("compilation", &time);
2065 EventCompilation event;
2066
2067 // Skip redefined methods
2068 if (target_handle->is_old()) {
2069 failure_reason = "redefined method";
2070 retry_message = "not retryable";
2071 compilable = ciEnv::MethodCompilable_never;
2072 } else {
2073 JVMCIEnv env(task, system_dictionary_modification_counter);
2074 methodHandle method(thread, target_handle);
2075 jvmci->compile_method(method, osr_bci, &env);
2076
2077 failure_reason = env.failure_reason();
2078 failure_reason_on_C_heap = env.failure_reason_on_C_heap();
2079 if (!env.retryable()) {
2080 retry_message = "not retryable";
2081 compilable = ciEnv::MethodCompilable_not_at_tier;
2082 }
2083 }
2084 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2085 if (event.should_commit()) {
2086 post_compilation_event(&event, task);
2087 }
2088
2089 } else
2090 #endif // INCLUDE_JVMCI
2091 {
2092 NoHandleMark nhm;
2093 ThreadToNativeFromVM ttn(thread);
2094
2095 ciEnv ci_env(task, system_dictionary_modification_counter);
2096 if (should_break) {
2097 ci_env.set_break_at_compile(true);
2098 }
2099 if (should_log) {
2100 ci_env.set_log(thread->log());
2101 }
2102 assert(thread->env() == &ci_env, "set by ci_env");
2103 // The thread-env() field is cleared in ~CompileTaskWrapper.
2104
2105 // Cache Jvmti state
2106 ci_env.cache_jvmti_state();
2107
2108 // Cache DTrace flags
2109 ci_env.cache_dtrace_flags();
2110
2111 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2112
2113 TraceTime t1("compilation", &time);
2114 EventCompilation event;
2115
2116 if (comp == NULL) {
2117 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2118 } else {
2119 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2120 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2121 while (WhiteBox::compilation_locked) {
2122 locker.wait(Mutex::_no_safepoint_check_flag);
2123 }
2124 }
2125 comp->compile_method(&ci_env, target, osr_bci, directive);
2126 }
2127
2128 if (!ci_env.failing() && task->code() == NULL) {
2129 //assert(false, "compiler should always document failure");
2130 // The compiler elected, without comment, not to register a result.
2131 // Do not attempt further compilations of this method.
2132 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2133 }
2134
2135 // Copy this bit to the enclosing block:
2136 compilable = ci_env.compilable();
2137
2138 if (ci_env.failing()) {
2139 failure_reason = ci_env.failure_reason();
2140 retry_message = ci_env.retry_message();
2141 ci_env.report_failure(failure_reason);
2142 }
2143
2144 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2145 if (event.should_commit()) {
2146 post_compilation_event(&event, task);
2147 }
2148 }
2149 // Remove the JNI handle block after the ciEnv destructor has run in
2150 // the previous block.
2151 pop_jni_handle_block();
2152
2153 if (failure_reason != NULL) {
2154 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2155 if (_compilation_log != NULL) {
2156 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2157 }
2158 if (PrintCompilation) {
2159 FormatBufferResource msg = retry_message != NULL ?
2160 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2161 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2162 task->print(tty, msg);
2163 }
2164 }
2165
2166 methodHandle method(thread, task->method());
2167
2168 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2169
2170 collect_statistics(thread, time, task);
2171
2172 nmethod* nm = task->code();
2173 if (nm != NULL) {
2174 nm->maybe_print_nmethod(directive);
2175 }
2176 DirectivesStack::release(directive);
2177
2178 if (PrintCompilation && PrintCompilation2) {
2179 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2180 tty->print("%4d ", compile_id); // print compilation number
2181 tty->print("%s ", (is_osr ? "%" : " "));
2182 if (task->code() != NULL) {
2183 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2184 }
2185 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2186 }
2187
2188 Log(compilation, codecache) log;
2189 if (log.is_debug()) {
2190 LogStream ls(log.debug());
2191 codecache_print(&ls, /* detailed= */ false);
2192 }
2193 if (PrintCodeCacheOnCompilation) {
2194 codecache_print(/* detailed= */ false);
2195 }
2196 // Disable compilation, if required.
2197 switch (compilable) {
2198 case ciEnv::MethodCompilable_never:
2199 if (is_osr)
2200 method->set_not_osr_compilable_quietly();
2201 else
2202 method->set_not_compilable_quietly();
2203 break;
2204 case ciEnv::MethodCompilable_not_at_tier:
2205 if (is_osr)
2206 method->set_not_osr_compilable_quietly(task_level);
2207 else
2208 method->set_not_compilable_quietly(task_level);
2209 break;
2210 }
2211
2212 // Note that the queued_for_compilation bits are cleared without
2213 // protection of a mutex. [They were set by the requester thread,
2214 // when adding the task to the compile queue -- at which time the
2215 // compile queue lock was held. Subsequently, we acquired the compile
2216 // queue lock to get this task off the compile queue; thus (to belabour
2217 // the point somewhat) our clearing of the bits must be occurring
2218 // only after the setting of the bits. See also 14012000 above.
2219 method->clear_queued_for_compilation();
2220 }
2221
2222 /**
2223 * The CodeCache is full. Print warning and disable compilation.
2224 * Schedule code cache cleaning so compilation can continue later.
2225 * This function needs to be called only from CodeCache::allocate(),
2226 * since we currently handle a full code cache uniformly.
2227 */
2228 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2229 UseInterpreter = true;
2230 if (UseCompiler || AlwaysCompileLoopMethods ) {
2231 if (xtty != NULL) {
2232 ResourceMark rm;
2233 stringStream s;
2234 // Dump code cache state into a buffer before locking the tty,
2235 // because log_state() will use locks causing lock conflicts.
2236 CodeCache::log_state(&s);
2237 // Lock to prevent tearing
2238 ttyLocker ttyl;
2239 xtty->begin_elem("code_cache_full");
2240 xtty->print("%s", s.as_string());
2241 xtty->stamp();
2242 xtty->end_elem();
2243 }
2244
2245 #ifndef PRODUCT
2246 if (ExitOnFullCodeCache) {
2247 codecache_print(/* detailed= */ true);
2248 before_exit(JavaThread::current());
2249 exit_globals(); // will delete tty
2250 vm_direct_exit(1);
2251 }
2252 #endif
2253 if (UseCodeCacheFlushing) {
2254 // Since code cache is full, immediately stop new compiles
2255 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2256 NMethodSweeper::log_sweep("disable_compiler");
2257 }
2258 } else {
2259 disable_compilation_forever();
2260 }
2261
2262 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2263 }
2264 }
2265
2266 // ------------------------------------------------------------------
2267 // CompileBroker::set_last_compile
2268 //
2269 // Record this compilation for debugging purposes.
2270 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2271 ResourceMark rm;
2272 char* method_name = method->name()->as_C_string();
2273 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2274 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2275 char current_method[CompilerCounters::cmname_buffer_length];
2276 size_t maxLen = CompilerCounters::cmname_buffer_length;
2277
2278 if (UsePerfData) {
2279 const char* class_name = method->method_holder()->name()->as_C_string();
2280
2281 size_t s1len = strlen(class_name);
2282 size_t s2len = strlen(method_name);
2283
2284 // check if we need to truncate the string
2285 if (s1len + s2len + 2 > maxLen) {
2286
2287 // the strategy is to lop off the leading characters of the
2288 // class name and the trailing characters of the method name.
2289
2290 if (s2len + 2 > maxLen) {
2291 // lop of the entire class name string, let snprintf handle
2292 // truncation of the method name.
2293 class_name += s1len; // null string
2294 }
2295 else {
2296 // lop off the extra characters from the front of the class name
2297 class_name += ((s1len + s2len + 2) - maxLen);
2298 }
2299 }
2300
2301 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2302 }
2303
2304 if (CICountOSR && is_osr) {
2305 _last_compile_type = osr_compile;
2306 } else {
2307 _last_compile_type = normal_compile;
2308 }
2309 _last_compile_level = comp_level;
2310
2311 if (UsePerfData) {
2312 CompilerCounters* counters = thread->counters();
2313 counters->set_current_method(current_method);
2314 counters->set_compile_type((jlong)_last_compile_type);
2315 }
2316 }
2317
2318
2319 // ------------------------------------------------------------------
2320 // CompileBroker::push_jni_handle_block
2321 //
2322 // Push on a new block of JNI handles.
2323 void CompileBroker::push_jni_handle_block() {
2324 JavaThread* thread = JavaThread::current();
2325
2326 // Allocate a new block for JNI handles.
2327 // Inlined code from jni_PushLocalFrame()
2328 JNIHandleBlock* java_handles = thread->active_handles();
2329 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2330 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2331 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2332 thread->set_active_handles(compile_handles);
2333 }
2334
2335
2336 // ------------------------------------------------------------------
2337 // CompileBroker::pop_jni_handle_block
2338 //
2339 // Pop off the current block of JNI handles.
2340 void CompileBroker::pop_jni_handle_block() {
2341 JavaThread* thread = JavaThread::current();
2342
2343 // Release our JNI handle block
2344 JNIHandleBlock* compile_handles = thread->active_handles();
2345 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2346 thread->set_active_handles(java_handles);
2347 compile_handles->set_pop_frame_link(NULL);
2348 JNIHandleBlock::release_block(compile_handles, thread); // may block
2349 }
2350
2351 // ------------------------------------------------------------------
2352 // CompileBroker::collect_statistics
2353 //
2354 // Collect statistics about the compilation.
2355
2356 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2357 bool success = task->is_success();
2358 methodHandle method (thread, task->method());
2359 uint compile_id = task->compile_id();
2360 bool is_osr = (task->osr_bci() != standard_entry_bci);
2361 nmethod* code = task->code();
2362 CompilerCounters* counters = thread->counters();
2363
2364 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2365 MutexLocker locker(CompileStatistics_lock);
2366
2367 // _perf variables are production performance counters which are
2368 // updated regardless of the setting of the CITime and CITimeEach flags
2369 //
2370
2371 // account all time, including bailouts and failures in this counter;
2372 // C1 and C2 counters are counting both successful and unsuccessful compiles
2373 _t_total_compilation.add(time);
2374
2375 if (!success) {
2376 _total_bailout_count++;
2377 if (UsePerfData) {
2378 _perf_last_failed_method->set_value(counters->current_method());
2379 _perf_last_failed_type->set_value(counters->compile_type());
2380 _perf_total_bailout_count->inc();
2381 }
2382 _t_bailedout_compilation.add(time);
2383 } else if (code == NULL) {
2384 if (UsePerfData) {
2385 _perf_last_invalidated_method->set_value(counters->current_method());
2386 _perf_last_invalidated_type->set_value(counters->compile_type());
2387 _perf_total_invalidated_count->inc();
2388 }
2389 _total_invalidated_count++;
2390 _t_invalidated_compilation.add(time);
2391 } else {
2392 // Compilation succeeded
2393
2394 // update compilation ticks - used by the implementation of
2395 // java.lang.management.CompilationMBean
2396 _perf_total_compilation->inc(time.ticks());
2397 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2398
2399 if (CITime) {
2400 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2401 if (is_osr) {
2402 _t_osr_compilation.add(time);
2403 _sum_osr_bytes_compiled += bytes_compiled;
2404 } else {
2405 _t_standard_compilation.add(time);
2406 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2407 }
2408
2409 #if INCLUDE_JVMCI
2410 AbstractCompiler* comp = compiler(task->comp_level());
2411 if (comp) {
2412 CompilerStatistics* stats = comp->stats();
2413 if (stats) {
2414 if (is_osr) {
2415 stats->_osr.update(time, bytes_compiled);
2416 } else {
2417 stats->_standard.update(time, bytes_compiled);
2418 }
2419 stats->_nmethods_size += code->total_size();
2420 stats->_nmethods_code_size += code->insts_size();
2421 } else { // if (!stats)
2422 assert(false, "Compiler statistics object must exist");
2423 }
2424 } else { // if (!comp)
2425 assert(false, "Compiler object must exist");
2426 }
2427 #endif // INCLUDE_JVMCI
2428 }
2429
2430 if (UsePerfData) {
2431 // save the name of the last method compiled
2432 _perf_last_method->set_value(counters->current_method());
2433 _perf_last_compile_type->set_value(counters->compile_type());
2434 _perf_last_compile_size->set_value(method->code_size() +
2435 task->num_inlined_bytecodes());
2436 if (is_osr) {
2437 _perf_osr_compilation->inc(time.ticks());
2438 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2439 } else {
2440 _perf_standard_compilation->inc(time.ticks());
2441 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2442 }
2443 }
2444
2445 if (CITimeEach) {
2446 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2447 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2448 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2449 }
2450
2451 // Collect counts of successful compilations
2452 _sum_nmethod_size += code->total_size();
2453 _sum_nmethod_code_size += code->insts_size();
2454 _total_compile_count++;
2455
2456 if (UsePerfData) {
2457 _perf_sum_nmethod_size->inc( code->total_size());
2458 _perf_sum_nmethod_code_size->inc(code->insts_size());
2459 _perf_total_compile_count->inc();
2460 }
2461
2462 if (is_osr) {
2463 if (UsePerfData) _perf_total_osr_compile_count->inc();
2464 _total_osr_compile_count++;
2465 } else {
2466 if (UsePerfData) _perf_total_standard_compile_count->inc();
2467 _total_standard_compile_count++;
2468 }
2469 }
2470 // set the current method for the thread to null
2471 if (UsePerfData) counters->set_current_method("");
2472 }
2473
2474 const char* CompileBroker::compiler_name(int comp_level) {
2475 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2476 if (comp == NULL) {
2477 return "no compiler";
2478 } else {
2479 return (comp->name());
2480 }
2481 }
2482
2483 #if INCLUDE_JVMCI
2484 void CompileBroker::print_times(AbstractCompiler* comp) {
2485 CompilerStatistics* stats = comp->stats();
2486 if (stats) {
2487 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}",
2488 comp->name(), stats->bytes_per_second(),
2489 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2490 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2491 stats->_nmethods_size, stats->_nmethods_code_size);
2492 } else { // if (!stats)
2493 assert(false, "Compiler statistics object must exist");
2494 }
2495 comp->print_timers();
2496 }
2497 #endif // INCLUDE_JVMCI
2498
2499 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2500 #if INCLUDE_JVMCI
2501 elapsedTimer standard_compilation;
2502 elapsedTimer total_compilation;
2503 elapsedTimer osr_compilation;
2504
2505 int standard_bytes_compiled = 0;
2506 int osr_bytes_compiled = 0;
2507
2508 int standard_compile_count = 0;
2509 int osr_compile_count = 0;
2510 int total_compile_count = 0;
2511
2512 int nmethods_size = 0;
2513 int nmethods_code_size = 0;
2514 bool printedHeader = false;
2515
2516 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2517 AbstractCompiler* comp = _compilers[i];
2518 if (comp != NULL) {
2519 if (per_compiler && aggregate && !printedHeader) {
2520 printedHeader = true;
2521 tty->cr();
2522 tty->print_cr("Individual compiler times (for compiled methods only)");
2523 tty->print_cr("------------------------------------------------");
2524 tty->cr();
2525 }
2526 CompilerStatistics* stats = comp->stats();
2527
2528 if (stats) {
2529 standard_compilation.add(stats->_standard._time);
2530 osr_compilation.add(stats->_osr._time);
2531
2532 standard_bytes_compiled += stats->_standard._bytes;
2533 osr_bytes_compiled += stats->_osr._bytes;
2534
2535 standard_compile_count += stats->_standard._count;
2536 osr_compile_count += stats->_osr._count;
2537
2538 nmethods_size += stats->_nmethods_size;
2539 nmethods_code_size += stats->_nmethods_code_size;
2540 } else { // if (!stats)
2541 assert(false, "Compiler statistics object must exist");
2542 }
2543
2544 if (per_compiler) {
2545 print_times(comp);
2546 }
2547 }
2548 }
2549 total_compile_count = osr_compile_count + standard_compile_count;
2550 total_compilation.add(osr_compilation);
2551 total_compilation.add(standard_compilation);
2552
2553 // In hosted mode, print the JVMCI compiler specific counters manually.
2554 if (!UseJVMCICompiler) {
2555 JVMCICompiler::print_compilation_timers();
2556 }
2557 #else // INCLUDE_JVMCI
2558 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2559 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2560 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2561
2562 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2563 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2564
2565 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2566 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2567 int total_compile_count = CompileBroker::_total_compile_count;
2568
2569 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2570 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2571 #endif // INCLUDE_JVMCI
2572
2573 if (!aggregate) {
2574 return;
2575 }
2576 tty->cr();
2577 tty->print_cr("Accumulated compiler times");
2578 tty->print_cr("----------------------------------------------------------");
2579 //0000000000111111111122222222223333333333444444444455555555556666666666
2580 //0123456789012345678901234567890123456789012345678901234567890123456789
2581 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2582 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2583 standard_compilation.seconds(),
2584 standard_compilation.seconds() / standard_compile_count);
2585 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2586 CompileBroker::_t_bailedout_compilation.seconds(),
2587 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2588 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2589 osr_compilation.seconds(),
2590 osr_compilation.seconds() / osr_compile_count);
2591 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2592 CompileBroker::_t_invalidated_compilation.seconds(),
2593 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2594
2595 AbstractCompiler *comp = compiler(CompLevel_simple);
2596 if (comp != NULL) {
2597 tty->cr();
2598 comp->print_timers();
2599 }
2600 comp = compiler(CompLevel_full_optimization);
2601 if (comp != NULL) {
2602 tty->cr();
2603 comp->print_timers();
2604 }
2605 tty->cr();
2606 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2607 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2608 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2609 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2610 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2611 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2612 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2613 double tcs = total_compilation.seconds();
2614 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2615 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2616 tty->cr();
2617 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2618 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2619 }
2620
2621 // Debugging output for failure
2622 void CompileBroker::print_last_compile() {
2623 if (_last_compile_level != CompLevel_none &&
2624 compiler(_last_compile_level) != NULL &&
2625 _last_compile_type != no_compile) {
2626 if (_last_compile_type == osr_compile) {
2627 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2628 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2629 } else {
2630 tty->print_cr("Last parse: %d+++(%d) %s",
2631 _compilation_id, _last_compile_level, _last_method_compiled);
2632 }
2633 }
2634 }
2635
2636 // Print general/accumulated JIT information.
2637 void CompileBroker::print_info(outputStream *out) {
2638 if (out == NULL) out = tty;
2639 out->cr();
2640 out->print_cr("======================");
2641 out->print_cr(" General JIT info ");
2642 out->print_cr("======================");
2643 out->cr();
2644 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2645 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2646 out->cr();
2647 out->print_cr("CodeCache overview");
2648 out->print_cr("--------------------------------------------------------");
2649 out->cr();
2650 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2651 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2652 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2653 out->cr();
2654
2655 out->cr();
2656 out->print_cr("CodeCache cleaning overview");
2657 out->print_cr("--------------------------------------------------------");
2658 out->cr();
2659 NMethodSweeper::print(out);
2660 out->print_cr("--------------------------------------------------------");
2661 out->cr();
2662 }
2663
2664 // Note: tty_lock must not be held upon entry to this function.
2665 // Print functions called from herein do "micro-locking" on tty_lock.
2666 // That's a tradeoff which keeps together important blocks of output.
2667 // At the same time, continuous tty_lock hold time is kept in check,
2668 // preventing concurrently printing threads from stalling a long time.
2669 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2670 TimeStamp ts_total;
2671 TimeStamp ts_global;
2672 TimeStamp ts;
2673
2674 bool allFun = !strcmp(function, "all");
2675 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2676 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2677 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2678 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2679 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2680 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2681 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2682 bool discard = !strcmp(function, "discard") || allFun;
2683
2684 if (out == NULL) {
2685 out = tty;
2686 }
2687
2688 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2689 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2690 out->cr();
2691 return;
2692 }
2693
2694 ts_total.update(); // record starting point
2695
2696 if (aggregate) {
2697 print_info(out);
2698 }
2699
2700 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2701 // That prevents another thread from destroying our view on the CodeHeap.
2702 // When we request individual parts of the analysis via the jcmd interface, it is possible
2703 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2704 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2705 // across user interaction.
2706 // Acquire this lock before acquiring the CodeCache_lock.
2707 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2708 // leading to an unnecessarily long hold time of the CodeCache_lock.
2709 ts.update(); // record starting point
2710 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2711 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2712
2713 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2714 // for the entire duration of aggregation and printing. That makes sure
2715 // we see a consistent picture and do not run into issues caused by
2716 // the CodeHeap being altered concurrently.
2717 Monitor* global_lock = allFun ? CodeCache_lock : NULL;
2718 Monitor* function_lock = allFun ? NULL : CodeCache_lock;
2719 ts_global.update(); // record starting point
2720 MutexLockerEx mu2(global_lock, Mutex::_no_safepoint_check_flag);
2721 if (global_lock != NULL) {
2722 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2723 ts_global.update(); // record starting point
2724 }
2725
2726 if (aggregate) {
2727 ts.update(); // record starting point
2728 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag);
2729 if (function_lock != NULL) {
2730 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2731 }
2732
2733 ts.update(); // record starting point
2734 CodeCache::aggregate(out, granularity);
2735 if (function_lock != NULL) {
2736 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2737 }
2738 }
2739
2740 if (usedSpace) CodeCache::print_usedSpace(out);
2741 if (freeSpace) CodeCache::print_freeSpace(out);
2742 if (methodCount) CodeCache::print_count(out);
2743 if (methodSpace) CodeCache::print_space(out);
2744 if (methodAge) CodeCache::print_age(out);
2745 if (methodNames) {
2746 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2747 // Therefore, request the CodeCache_lock before calling...
2748 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag);
2749 CodeCache::print_names(out);
2750 }
2751 if (discard) CodeCache::discard(out);
2752
2753 if (global_lock != NULL) {
2754 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2755 }
2756 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2757 }