1 /*
2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compileBroker.hpp"
34 #include "compiler/compileLog.hpp"
35 #include "compiler/compilerOracle.hpp"
36 #include "compiler/directivesParser.hpp"
37 #include "interpreter/linkResolver.hpp"
38 #include "jfr/jfrEvents.hpp"
39 #include "logging/log.hpp"
40 #include "logging/logStream.hpp"
41 #include "memory/allocation.inline.hpp"
42 #include "memory/resourceArea.hpp"
43 #include "memory/universe.hpp"
44 #include "oops/methodData.hpp"
45 #include "oops/method.inline.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "prims/nativeLookup.hpp"
48 #include "prims/whitebox.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/atomic.hpp"
51 #include "runtime/compilationPolicy.hpp"
52 #include "runtime/handles.inline.hpp"
53 #include "runtime/init.hpp"
54 #include "runtime/interfaceSupport.inline.hpp"
55 #include "runtime/javaCalls.hpp"
56 #include "runtime/jniHandles.inline.hpp"
57 #include "runtime/os.hpp"
58 #include "runtime/safepointVerifiers.hpp"
59 #include "runtime/sharedRuntime.hpp"
60 #include "runtime/sweeper.hpp"
61 #include "runtime/timerTrace.hpp"
62 #include "runtime/vframe.inline.hpp"
63 #include "utilities/debug.hpp"
64 #include "utilities/dtrace.hpp"
65 #include "utilities/events.hpp"
66 #include "utilities/formatBuffer.hpp"
67 #include "utilities/macros.hpp"
68 #ifdef COMPILER1
69 #include "c1/c1_Compiler.hpp"
70 #endif
71 #if INCLUDE_JVMCI
72 #include "jvmci/jvmciEnv.hpp"
73 #include "jvmci/jvmciRuntime.hpp"
74 #endif
75 #ifdef COMPILER2
76 #include "opto/c2compiler.hpp"
77 #endif
78
79 #ifdef DTRACE_ENABLED
80
81 // Only bother with this argument setup if dtrace is available
82
83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
84 { \
85 Symbol* klass_name = (method)->klass_name(); \
86 Symbol* name = (method)->name(); \
87 Symbol* signature = (method)->signature(); \
88 HOTSPOT_METHOD_COMPILE_BEGIN( \
89 (char *) comp_name, strlen(comp_name), \
90 (char *) klass_name->bytes(), klass_name->utf8_length(), \
91 (char *) name->bytes(), name->utf8_length(), \
92 (char *) signature->bytes(), signature->utf8_length()); \
93 }
94
95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_END( \
101 (char *) comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length(), (success)); \
105 }
106
107 #else // ndef DTRACE_ENABLED
108
109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
111
112 #endif // ndef DTRACE_ENABLED
113
114 bool CompileBroker::_initialized = false;
115 volatile bool CompileBroker::_should_block = false;
116 volatile int CompileBroker::_print_compilation_warning = 0;
117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
118
119 // The installed compiler(s)
120 AbstractCompiler* CompileBroker::_compilers[2];
121
122 // The maximum numbers of compiler threads to be determined during startup.
123 int CompileBroker::_c1_count = 0;
124 int CompileBroker::_c2_count = 0;
125
126 // An array of compiler names as Java String objects
127 jobject* CompileBroker::_compiler1_objects = NULL;
128 jobject* CompileBroker::_compiler2_objects = NULL;
129
130 CompileLog** CompileBroker::_compiler1_logs = NULL;
131 CompileLog** CompileBroker::_compiler2_logs = NULL;
132
133 // These counters are used to assign an unique ID to each compilation.
134 volatile jint CompileBroker::_compilation_id = 0;
135 volatile jint CompileBroker::_osr_compilation_id = 0;
136
137 // Performance counters
138 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
139 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
140 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
141
142 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
143 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
144 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
145 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
146 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
147
148 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
149 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
150 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
151 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
152
153 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
154 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
155 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
156 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
157 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
158 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
159 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
160
161 // Timers and counters for generating statistics
162 elapsedTimer CompileBroker::_t_total_compilation;
163 elapsedTimer CompileBroker::_t_osr_compilation;
164 elapsedTimer CompileBroker::_t_standard_compilation;
165 elapsedTimer CompileBroker::_t_invalidated_compilation;
166 elapsedTimer CompileBroker::_t_bailedout_compilation;
167
168 int CompileBroker::_total_bailout_count = 0;
169 int CompileBroker::_total_invalidated_count = 0;
170 int CompileBroker::_total_compile_count = 0;
171 int CompileBroker::_total_osr_compile_count = 0;
172 int CompileBroker::_total_standard_compile_count = 0;
173 int CompileBroker::_total_compiler_stopped_count = 0;
174 int CompileBroker::_total_compiler_restarted_count = 0;
175
176 int CompileBroker::_sum_osr_bytes_compiled = 0;
177 int CompileBroker::_sum_standard_bytes_compiled = 0;
178 int CompileBroker::_sum_nmethod_size = 0;
179 int CompileBroker::_sum_nmethod_code_size = 0;
180
181 long CompileBroker::_peak_compilation_time = 0;
182
183 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
184 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
185
186
187
188 class CompilationLog : public StringEventLog {
189 public:
190 CompilationLog() : StringEventLog("Compilation events", "jit") {
191 }
192
193 void log_compile(JavaThread* thread, CompileTask* task) {
194 StringLogMessage lm;
195 stringStream sstr(lm.buffer(), lm.size());
196 // msg.time_stamp().update_to(tty->time_stamp().ticks());
197 task->print(&sstr, NULL, true, false);
198 log(thread, "%s", (const char*)lm);
199 }
200
201 void log_nmethod(JavaThread* thread, nmethod* nm) {
202 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
203 nm->compile_id(), nm->is_osr_method() ? "%" : "",
204 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
205 }
206
207 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
208 StringLogMessage lm;
209 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
210 if (retry_message != NULL) {
211 lm.append(" (%s)", retry_message);
212 }
213 lm.print("\n");
214 log(thread, "%s", (const char*)lm);
215 }
216
217 void log_metaspace_failure(const char* reason) {
218 ResourceMark rm;
219 StringLogMessage lm;
220 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
221 lm.print("\n");
222 log(JavaThread::current(), "%s", (const char*)lm);
223 }
224 };
225
226 static CompilationLog* _compilation_log = NULL;
227
228 bool compileBroker_init() {
229 if (LogEvents) {
230 _compilation_log = new CompilationLog();
231 }
232
233 // init directives stack, adding default directive
234 DirectivesStack::init();
235
236 if (DirectivesParser::has_file()) {
237 return DirectivesParser::parse_from_flag();
238 } else if (CompilerDirectivesPrint) {
239 // Print default directive even when no other was added
240 DirectivesStack::print(tty);
241 }
242
243 return true;
244 }
245
246 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
247 CompilerThread* thread = CompilerThread::current();
248 thread->set_task(task);
249 #if INCLUDE_JVMCI
250 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
251 task->set_jvmci_compiler_thread(thread);
252 }
253 #endif
254 CompileLog* log = thread->log();
255 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
256 }
257
258 CompileTaskWrapper::~CompileTaskWrapper() {
259 CompilerThread* thread = CompilerThread::current();
260 CompileTask* task = thread->task();
261 CompileLog* log = thread->log();
262 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
263 thread->set_task(NULL);
264 task->set_code_handle(NULL);
265 thread->set_env(NULL);
266 if (task->is_blocking()) {
267 bool free_task = false;
268 {
269 MutexLocker notifier(task->lock(), thread);
270 task->mark_complete();
271 #if INCLUDE_JVMCI
272 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
273 if (!task->has_waiter()) {
274 // The waiting thread timed out and thus did not free the task.
275 free_task = true;
276 }
277 task->set_jvmci_compiler_thread(NULL);
278 }
279 #endif
280 if (!free_task) {
281 // Notify the waiting thread that the compilation has completed
282 // so that it can free the task.
283 task->lock()->notify_all();
284 }
285 }
286 if (free_task) {
287 // The task can only be freed once the task lock is released.
288 CompileTask::free(task);
289 }
290 } else {
291 task->mark_complete();
292
293 // By convention, the compiling thread is responsible for
294 // recycling a non-blocking CompileTask.
295 CompileTask::free(task);
296 }
297 }
298
299 /**
300 * Check if a CompilerThread can be removed and update count if requested.
301 */
302 static bool can_remove(CompilerThread *ct, bool do_it) {
303 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
304 if (!ReduceNumberOfCompilerThreads) return false;
305
306 AbstractCompiler *compiler = ct->compiler();
307 int compiler_count = compiler->num_compiler_threads();
308 bool c1 = compiler->is_c1();
309
310 // Keep at least 1 compiler thread of each type.
311 if (compiler_count < 2) return false;
312
313 // Keep thread alive for at least some time.
314 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
315
316 // We only allow the last compiler thread of each type to get removed.
317 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1)
318 : CompileBroker::compiler2_object(compiler_count - 1);
319 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) {
320 if (do_it) {
321 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
322 compiler->set_num_compiler_threads(compiler_count - 1);
323 }
324 return true;
325 }
326 return false;
327 }
328
329 /**
330 * Add a CompileTask to a CompileQueue.
331 */
332 void CompileQueue::add(CompileTask* task) {
333 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
334
335 task->set_next(NULL);
336 task->set_prev(NULL);
337
338 if (_last == NULL) {
339 // The compile queue is empty.
340 assert(_first == NULL, "queue is empty");
341 _first = task;
342 _last = task;
343 } else {
344 // Append the task to the queue.
345 assert(_last->next() == NULL, "not last");
346 _last->set_next(task);
347 task->set_prev(_last);
348 _last = task;
349 }
350 ++_size;
351
352 // Mark the method as being in the compile queue.
353 task->method()->set_queued_for_compilation();
354
355 if (CIPrintCompileQueue) {
356 print_tty();
357 }
358
359 if (LogCompilation && xtty != NULL) {
360 task->log_task_queued();
361 }
362
363 // Notify CompilerThreads that a task is available.
364 MethodCompileQueue_lock->notify_all();
365 }
366
367 /**
368 * Empties compilation queue by putting all compilation tasks onto
369 * a freelist. Furthermore, the method wakes up all threads that are
370 * waiting on a compilation task to finish. This can happen if background
371 * compilation is disabled.
372 */
373 void CompileQueue::free_all() {
374 MutexLocker mu(MethodCompileQueue_lock);
375 CompileTask* next = _first;
376
377 // Iterate over all tasks in the compile queue
378 while (next != NULL) {
379 CompileTask* current = next;
380 next = current->next();
381 {
382 // Wake up thread that blocks on the compile task.
383 MutexLocker ct_lock(current->lock());
384 current->lock()->notify();
385 }
386 // Put the task back on the freelist.
387 CompileTask::free(current);
388 }
389 _first = NULL;
390
391 // Wake up all threads that block on the queue.
392 MethodCompileQueue_lock->notify_all();
393 }
394
395 /**
396 * Get the next CompileTask from a CompileQueue
397 */
398 CompileTask* CompileQueue::get() {
399 // save methods from RedefineClasses across safepoint
400 // across MethodCompileQueue_lock below.
401 methodHandle save_method;
402 methodHandle save_hot_method;
403
404 MonitorLocker locker(MethodCompileQueue_lock);
405 // If _first is NULL we have no more compile jobs. There are two reasons for
406 // having no compile jobs: First, we compiled everything we wanted. Second,
407 // we ran out of code cache so compilation has been disabled. In the latter
408 // case we perform code cache sweeps to free memory such that we can re-enable
409 // compilation.
410 while (_first == NULL) {
411 // Exit loop if compilation is disabled forever
412 if (CompileBroker::is_compilation_disabled_forever()) {
413 return NULL;
414 }
415
416 // If there are no compilation tasks and we can compile new jobs
417 // (i.e., there is enough free space in the code cache) there is
418 // no need to invoke the sweeper. As a result, the hotness of methods
419 // remains unchanged. This behavior is desired, since we want to keep
420 // the stable state, i.e., we do not want to evict methods from the
421 // code cache if it is unnecessary.
422 // We need a timed wait here, since compiler threads can exit if compilation
423 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
424 // is not critical and we do not want idle compiler threads to wake up too often.
425 locker.wait(5*1000);
426
427 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
428 // Still nothing to compile. Give caller a chance to stop this thread.
429 if (can_remove(CompilerThread::current(), false)) return NULL;
430 }
431 }
432
433 if (CompileBroker::is_compilation_disabled_forever()) {
434 return NULL;
435 }
436
437 CompileTask* task;
438 {
439 NoSafepointVerifier nsv;
440 task = CompilationPolicy::policy()->select_task(this);
441 if (task != NULL) {
442 task = task->select_for_compilation();
443 }
444 }
445
446 if (task != NULL) {
447 // Save method pointers across unlock safepoint. The task is removed from
448 // the compilation queue, which is walked during RedefineClasses.
449 save_method = methodHandle(task->method());
450 save_hot_method = methodHandle(task->hot_method());
451
452 remove(task);
453 }
454 purge_stale_tasks(); // may temporarily release MCQ lock
455 return task;
456 }
457
458 // Clean & deallocate stale compile tasks.
459 // Temporarily releases MethodCompileQueue lock.
460 void CompileQueue::purge_stale_tasks() {
461 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
462 if (_first_stale != NULL) {
463 // Stale tasks are purged when MCQ lock is released,
464 // but _first_stale updates are protected by MCQ lock.
465 // Once task processing starts and MCQ lock is released,
466 // other compiler threads can reuse _first_stale.
467 CompileTask* head = _first_stale;
468 _first_stale = NULL;
469 {
470 MutexUnlocker ul(MethodCompileQueue_lock);
471 for (CompileTask* task = head; task != NULL; ) {
472 CompileTask* next_task = task->next();
473 CompileTaskWrapper ctw(task); // Frees the task
474 task->set_failure_reason("stale task");
475 task = next_task;
476 }
477 }
478 }
479 }
480
481 void CompileQueue::remove(CompileTask* task) {
482 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
483 if (task->prev() != NULL) {
484 task->prev()->set_next(task->next());
485 } else {
486 // max is the first element
487 assert(task == _first, "Sanity");
488 _first = task->next();
489 }
490
491 if (task->next() != NULL) {
492 task->next()->set_prev(task->prev());
493 } else {
494 // max is the last element
495 assert(task == _last, "Sanity");
496 _last = task->prev();
497 }
498 --_size;
499 }
500
501 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
502 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
503 remove(task);
504
505 // Enqueue the task for reclamation (should be done outside MCQ lock)
506 task->set_next(_first_stale);
507 task->set_prev(NULL);
508 _first_stale = task;
509 }
510
511 // methods in the compile queue need to be marked as used on the stack
512 // so that they don't get reclaimed by Redefine Classes
513 void CompileQueue::mark_on_stack() {
514 CompileTask* task = _first;
515 while (task != NULL) {
516 task->mark_on_stack();
517 task = task->next();
518 }
519 }
520
521
522 CompileQueue* CompileBroker::compile_queue(int comp_level) {
523 if (is_c2_compile(comp_level)) return _c2_compile_queue;
524 if (is_c1_compile(comp_level)) return _c1_compile_queue;
525 return NULL;
526 }
527
528 void CompileBroker::print_compile_queues(outputStream* st) {
529 st->print_cr("Current compiles: ");
530
531 char buf[2000];
532 int buflen = sizeof(buf);
533 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
534
535 st->cr();
536 if (_c1_compile_queue != NULL) {
537 _c1_compile_queue->print(st);
538 }
539 if (_c2_compile_queue != NULL) {
540 _c2_compile_queue->print(st);
541 }
542 }
543
544 void CompileQueue::print(outputStream* st) {
545 assert_locked_or_safepoint(MethodCompileQueue_lock);
546 st->print_cr("%s:", name());
547 CompileTask* task = _first;
548 if (task == NULL) {
549 st->print_cr("Empty");
550 } else {
551 while (task != NULL) {
552 task->print(st, NULL, true, true);
553 task = task->next();
554 }
555 }
556 st->cr();
557 }
558
559 void CompileQueue::print_tty() {
560 ttyLocker ttyl;
561 print(tty);
562 }
563
564 CompilerCounters::CompilerCounters() {
565 _current_method[0] = '\0';
566 _compile_type = CompileBroker::no_compile;
567 }
568
569 // ------------------------------------------------------------------
570 // CompileBroker::compilation_init
571 //
572 // Initialize the Compilation object
573 void CompileBroker::compilation_init_phase1(TRAPS) {
574 // No need to initialize compilation system if we do not use it.
575 if (!UseCompiler) {
576 return;
577 }
578 // Set the interface to the current compiler(s).
579 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
580 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
581
582 #if INCLUDE_JVMCI
583 if (EnableJVMCI) {
584 // This is creating a JVMCICompiler singleton.
585 JVMCICompiler* jvmci = new JVMCICompiler();
586
587 if (UseJVMCICompiler) {
588 _compilers[1] = jvmci;
589 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
590 if (BootstrapJVMCI) {
591 // JVMCI will bootstrap so give it more threads
592 _c2_count = MIN2(32, os::active_processor_count());
593 }
594 } else {
595 _c2_count = JVMCIThreads;
596 }
597 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
598 } else {
599 _c1_count = JVMCIHostThreads;
600 }
601 }
602 }
603 #endif // INCLUDE_JVMCI
604
605 #ifdef COMPILER1
606 if (_c1_count > 0) {
607 _compilers[0] = new Compiler();
608 }
609 #endif // COMPILER1
610
611 #ifdef COMPILER2
612 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
613 if (_c2_count > 0) {
614 _compilers[1] = new C2Compiler();
615 }
616 }
617 #endif // COMPILER2
618
619 // Start the compiler thread(s) and the sweeper thread
620 init_compiler_sweeper_threads();
621 // totalTime performance counter is always created as it is required
622 // by the implementation of java.lang.management.CompilationMBean.
623 {
624 EXCEPTION_MARK;
625 _perf_total_compilation =
626 PerfDataManager::create_counter(JAVA_CI, "totalTime",
627 PerfData::U_Ticks, CHECK);
628 }
629
630 if (UsePerfData) {
631
632 EXCEPTION_MARK;
633
634 // create the jvmstat performance counters
635 _perf_osr_compilation =
636 PerfDataManager::create_counter(SUN_CI, "osrTime",
637 PerfData::U_Ticks, CHECK);
638
639 _perf_standard_compilation =
640 PerfDataManager::create_counter(SUN_CI, "standardTime",
641 PerfData::U_Ticks, CHECK);
642
643 _perf_total_bailout_count =
644 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
645 PerfData::U_Events, CHECK);
646
647 _perf_total_invalidated_count =
648 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
649 PerfData::U_Events, CHECK);
650
651 _perf_total_compile_count =
652 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
653 PerfData::U_Events, CHECK);
654 _perf_total_osr_compile_count =
655 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
656 PerfData::U_Events, CHECK);
657
658 _perf_total_standard_compile_count =
659 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
660 PerfData::U_Events, CHECK);
661
662 _perf_sum_osr_bytes_compiled =
663 PerfDataManager::create_counter(SUN_CI, "osrBytes",
664 PerfData::U_Bytes, CHECK);
665
666 _perf_sum_standard_bytes_compiled =
667 PerfDataManager::create_counter(SUN_CI, "standardBytes",
668 PerfData::U_Bytes, CHECK);
669
670 _perf_sum_nmethod_size =
671 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
672 PerfData::U_Bytes, CHECK);
673
674 _perf_sum_nmethod_code_size =
675 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
676 PerfData::U_Bytes, CHECK);
677
678 _perf_last_method =
679 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
680 CompilerCounters::cmname_buffer_length,
681 "", CHECK);
682
683 _perf_last_failed_method =
684 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
685 CompilerCounters::cmname_buffer_length,
686 "", CHECK);
687
688 _perf_last_invalidated_method =
689 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
690 CompilerCounters::cmname_buffer_length,
691 "", CHECK);
692
693 _perf_last_compile_type =
694 PerfDataManager::create_variable(SUN_CI, "lastType",
695 PerfData::U_None,
696 (jlong)CompileBroker::no_compile,
697 CHECK);
698
699 _perf_last_compile_size =
700 PerfDataManager::create_variable(SUN_CI, "lastSize",
701 PerfData::U_Bytes,
702 (jlong)CompileBroker::no_compile,
703 CHECK);
704
705
706 _perf_last_failed_type =
707 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
708 PerfData::U_None,
709 (jlong)CompileBroker::no_compile,
710 CHECK);
711
712 _perf_last_invalidated_type =
713 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
714 PerfData::U_None,
715 (jlong)CompileBroker::no_compile,
716 CHECK);
717 }
718 }
719
720 // Completes compiler initialization. Compilation requests submitted
721 // prior to this will be silently ignored.
722 void CompileBroker::compilation_init_phase2() {
723 _initialized = true;
724 }
725
726 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
727 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
728 Handle thread_group(THREAD, Universe::system_thread_group());
729 return JavaCalls::construct_new_instance(
730 SystemDictionary::Thread_klass(),
731 vmSymbols::threadgroup_string_void_signature(),
732 thread_group,
733 string,
734 CHECK_NH);
735 }
736
737
738 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) {
739 JavaThread* thread = NULL;
740 {
741 MutexLocker mu(Threads_lock, THREAD);
742 if (comp != NULL) {
743 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
744 CompilerCounters* counters = new CompilerCounters();
745 thread = new CompilerThread(queue, counters);
746 }
747 } else {
748 thread = new CodeCacheSweeperThread();
749 }
750 // At this point the new CompilerThread data-races with this startup
751 // thread (which I believe is the primoridal thread and NOT the VM
752 // thread). This means Java bytecodes being executed at startup can
753 // queue compile jobs which will run at whatever default priority the
754 // newly created CompilerThread runs at.
755
756
757 // At this point it may be possible that no osthread was created for the
758 // JavaThread due to lack of memory. We would have to throw an exception
759 // in that case. However, since this must work and we do not allow
760 // exceptions anyway, check and abort if this fails. But first release the
761 // lock.
762
763 if (thread != NULL && thread->osthread() != NULL) {
764
765 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread);
766
767 // Note that this only sets the JavaThread _priority field, which by
768 // definition is limited to Java priorities and not OS priorities.
769 // The os-priority is set in the CompilerThread startup code itself
770
771 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
772
773 // Note that we cannot call os::set_priority because it expects Java
774 // priorities and we are *explicitly* using OS priorities so that it's
775 // possible to set the compiler thread priority higher than any Java
776 // thread.
777
778 int native_prio = CompilerThreadPriority;
779 if (native_prio == -1) {
780 if (UseCriticalCompilerThreadPriority) {
781 native_prio = os::java_to_os_priority[CriticalPriority];
782 } else {
783 native_prio = os::java_to_os_priority[NearMaxPriority];
784 }
785 }
786 os::set_native_priority(thread, native_prio);
787
788 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
789
790 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
791 if (comp != NULL) {
792 thread->as_CompilerThread()->set_compiler(comp);
793 }
794 Threads::add(thread);
795 Thread::start(thread);
796 }
797 }
798
799 // First release lock before aborting VM.
800 if (thread == NULL || thread->osthread() == NULL) {
801 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
802 if (thread != NULL) {
803 thread->smr_delete();
804 }
805 return NULL;
806 }
807 vm_exit_during_initialization("java.lang.OutOfMemoryError",
808 os::native_thread_creation_failed_msg());
809 }
810
811 // Let go of Threads_lock before yielding
812 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
813
814 return thread;
815 }
816
817
818 void CompileBroker::init_compiler_sweeper_threads() {
819 EXCEPTION_MARK;
820 #if !defined(ZERO)
821 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
822 #endif // !ZERO
823 // Initialize the compilation queue
824 if (_c2_count > 0) {
825 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
826 _c2_compile_queue = new CompileQueue(name);
827 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
828 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
829 }
830 if (_c1_count > 0) {
831 _c1_compile_queue = new CompileQueue("C1 compile queue");
832 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
833 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
834 }
835
836 char name_buffer[256];
837
838 for (int i = 0; i < _c2_count; i++) {
839 // Create a name for our thread.
840 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
841 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
842 jobject thread_handle = JNIHandles::make_global(thread_oop);
843 _compiler2_objects[i] = thread_handle;
844 _compiler2_logs[i] = NULL;
845
846 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
847 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK);
848 assert(ct != NULL, "should have been handled for initial thread");
849 _compilers[1]->set_num_compiler_threads(i + 1);
850 if (TraceCompilerThreads) {
851 ResourceMark rm;
852 MutexLocker mu(Threads_lock);
853 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
854 }
855 }
856 }
857
858 for (int i = 0; i < _c1_count; i++) {
859 // Create a name for our thread.
860 sprintf(name_buffer, "C1 CompilerThread%d", i);
861 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
862 jobject thread_handle = JNIHandles::make_global(thread_oop);
863 _compiler1_objects[i] = thread_handle;
864 _compiler1_logs[i] = NULL;
865
866 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
867 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK);
868 assert(ct != NULL, "should have been handled for initial thread");
869 _compilers[0]->set_num_compiler_threads(i + 1);
870 if (TraceCompilerThreads) {
871 ResourceMark rm;
872 MutexLocker mu(Threads_lock);
873 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
874 }
875 }
876 }
877
878 if (UsePerfData) {
879 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
880 }
881
882 if (MethodFlushing) {
883 // Initialize the sweeper thread
884 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
885 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
886 make_thread(thread_handle, NULL, NULL, CHECK);
887 }
888 }
889
890 void CompileBroker::possibly_add_compiler_threads() {
891 EXCEPTION_MARK;
892
893 julong available_memory = os::available_memory();
894 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
895 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
896 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
897
898 // Only do attempt to start additional threads if the lock is free.
899 if (!CompileThread_lock->try_lock()) return;
900
901 if (_c2_compile_queue != NULL) {
902 int old_c2_count = _compilers[1]->num_compiler_threads();
903 int new_c2_count = MIN4(_c2_count,
904 _c2_compile_queue->size() / 2,
905 (int)(available_memory / (200*M)),
906 (int)(available_cc_np / (128*K)));
907
908 for (int i = old_c2_count; i < new_c2_count; i++) {
909 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK);
910 if (ct == NULL) break;
911 _compilers[1]->set_num_compiler_threads(i + 1);
912 if (TraceCompilerThreads) {
913 ResourceMark rm;
914 MutexLocker mu(Threads_lock);
915 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
916 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
917 }
918 }
919 }
920
921 if (_c1_compile_queue != NULL) {
922 int old_c1_count = _compilers[0]->num_compiler_threads();
923 int new_c1_count = MIN4(_c1_count,
924 _c1_compile_queue->size() / 4,
925 (int)(available_memory / (100*M)),
926 (int)(available_cc_p / (128*K)));
927
928 for (int i = old_c1_count; i < new_c1_count; i++) {
929 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK);
930 if (ct == NULL) break;
931 _compilers[0]->set_num_compiler_threads(i + 1);
932 if (TraceCompilerThreads) {
933 ResourceMark rm;
934 MutexLocker mu(Threads_lock);
935 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
936 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
937 }
938 }
939 }
940
941 CompileThread_lock->unlock();
942 }
943
944
945 /**
946 * Set the methods on the stack as on_stack so that redefine classes doesn't
947 * reclaim them. This method is executed at a safepoint.
948 */
949 void CompileBroker::mark_on_stack() {
950 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
951 // Since we are at a safepoint, we do not need a lock to access
952 // the compile queues.
953 if (_c2_compile_queue != NULL) {
954 _c2_compile_queue->mark_on_stack();
955 }
956 if (_c1_compile_queue != NULL) {
957 _c1_compile_queue->mark_on_stack();
958 }
959 }
960
961 // ------------------------------------------------------------------
962 // CompileBroker::compile_method
963 //
964 // Request compilation of a method.
965 void CompileBroker::compile_method_base(const methodHandle& method,
966 int osr_bci,
967 int comp_level,
968 const methodHandle& hot_method,
969 int hot_count,
970 CompileTask::CompileReason compile_reason,
971 bool blocking,
972 Thread* thread) {
973 guarantee(!method->is_abstract(), "cannot compile abstract methods");
974 assert(method->method_holder()->is_instance_klass(),
975 "sanity check");
976 assert(!method->method_holder()->is_not_initialized(),
977 "method holder must be initialized");
978 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
979
980 if (CIPrintRequests) {
981 tty->print("request: ");
982 method->print_short_name(tty);
983 if (osr_bci != InvocationEntryBci) {
984 tty->print(" osr_bci: %d", osr_bci);
985 }
986 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
987 if (!hot_method.is_null()) {
988 tty->print(" hot: ");
989 if (hot_method() != method()) {
990 hot_method->print_short_name(tty);
991 } else {
992 tty->print("yes");
993 }
994 }
995 tty->cr();
996 }
997
998 // A request has been made for compilation. Before we do any
999 // real work, check to see if the method has been compiled
1000 // in the meantime with a definitive result.
1001 if (compilation_is_complete(method, osr_bci, comp_level)) {
1002 return;
1003 }
1004
1005 #ifndef PRODUCT
1006 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1007 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1008 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1009 return;
1010 }
1011 }
1012 #endif
1013
1014 // If this method is already in the compile queue, then
1015 // we do not block the current thread.
1016 if (compilation_is_in_queue(method)) {
1017 // We may want to decay our counter a bit here to prevent
1018 // multiple denied requests for compilation. This is an
1019 // open compilation policy issue. Note: The other possibility,
1020 // in the case that this is a blocking compile request, is to have
1021 // all subsequent blocking requesters wait for completion of
1022 // ongoing compiles. Note that in this case we'll need a protocol
1023 // for freeing the associated compile tasks. [Or we could have
1024 // a single static monitor on which all these waiters sleep.]
1025 return;
1026 }
1027
1028 if (TieredCompilation) {
1029 // Tiered policy requires MethodCounters to exist before adding a method to
1030 // the queue. Create if we don't have them yet.
1031 method->get_method_counters(thread);
1032 }
1033
1034 // Outputs from the following MutexLocker block:
1035 CompileTask* task = NULL;
1036 CompileQueue* queue = compile_queue(comp_level);
1037
1038 // Acquire our lock.
1039 {
1040 MutexLocker locker(MethodCompileQueue_lock, thread);
1041
1042 // Make sure the method has not slipped into the queues since
1043 // last we checked; note that those checks were "fast bail-outs".
1044 // Here we need to be more careful, see 14012000 below.
1045 if (compilation_is_in_queue(method)) {
1046 return;
1047 }
1048
1049 // We need to check again to see if the compilation has
1050 // completed. A previous compilation may have registered
1051 // some result.
1052 if (compilation_is_complete(method, osr_bci, comp_level)) {
1053 return;
1054 }
1055
1056 // We now know that this compilation is not pending, complete,
1057 // or prohibited. Assign a compile_id to this compilation
1058 // and check to see if it is in our [Start..Stop) range.
1059 int compile_id = assign_compile_id(method, osr_bci);
1060 if (compile_id == 0) {
1061 // The compilation falls outside the allowed range.
1062 return;
1063 }
1064
1065 #if INCLUDE_JVMCI
1066 if (UseJVMCICompiler && blocking) {
1067 // Don't allow blocking compiles for requests triggered by JVMCI.
1068 if (thread->is_Compiler_thread()) {
1069 blocking = false;
1070 }
1071
1072 if (!UseJVMCINativeLibrary) {
1073 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1074 vframeStream vfst((JavaThread*) thread);
1075 for (; !vfst.at_end(); vfst.next()) {
1076 if (vfst.method()->is_static_initializer() ||
1077 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1078 vfst.method()->name() == vmSymbols::loadClass_name())) {
1079 blocking = false;
1080 break;
1081 }
1082 }
1083 }
1084
1085 // Don't allow blocking compilation requests to JVMCI
1086 // if JVMCI itself is not yet initialized
1087 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1088 blocking = false;
1089 }
1090
1091 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1092 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1093 // such as the DestroyJavaVM thread.
1094 if (JVMCI::shutdown_called()) {
1095 blocking = false;
1096 }
1097 }
1098 #endif // INCLUDE_JVMCI
1099
1100 // We will enter the compilation in the queue.
1101 // 14012000: Note that this sets the queued_for_compile bits in
1102 // the target method. We can now reason that a method cannot be
1103 // queued for compilation more than once, as follows:
1104 // Before a thread queues a task for compilation, it first acquires
1105 // the compile queue lock, then checks if the method's queued bits
1106 // are set or it has already been compiled. Thus there can not be two
1107 // instances of a compilation task for the same method on the
1108 // compilation queue. Consider now the case where the compilation
1109 // thread has already removed a task for that method from the queue
1110 // and is in the midst of compiling it. In this case, the
1111 // queued_for_compile bits must be set in the method (and these
1112 // will be visible to the current thread, since the bits were set
1113 // under protection of the compile queue lock, which we hold now.
1114 // When the compilation completes, the compiler thread first sets
1115 // the compilation result and then clears the queued_for_compile
1116 // bits. Neither of these actions are protected by a barrier (or done
1117 // under the protection of a lock), so the only guarantee we have
1118 // (on machines with TSO (Total Store Order)) is that these values
1119 // will update in that order. As a result, the only combinations of
1120 // these bits that the current thread will see are, in temporal order:
1121 // <RESULT, QUEUE> :
1122 // <0, 1> : in compile queue, but not yet compiled
1123 // <1, 1> : compiled but queue bit not cleared
1124 // <1, 0> : compiled and queue bit cleared
1125 // Because we first check the queue bits then check the result bits,
1126 // we are assured that we cannot introduce a duplicate task.
1127 // Note that if we did the tests in the reverse order (i.e. check
1128 // result then check queued bit), we could get the result bit before
1129 // the compilation completed, and the queue bit after the compilation
1130 // completed, and end up introducing a "duplicate" (redundant) task.
1131 // In that case, the compiler thread should first check if a method
1132 // has already been compiled before trying to compile it.
1133 // NOTE: in the event that there are multiple compiler threads and
1134 // there is de-optimization/recompilation, things will get hairy,
1135 // and in that case it's best to protect both the testing (here) of
1136 // these bits, and their updating (here and elsewhere) under a
1137 // common lock.
1138 task = create_compile_task(queue,
1139 compile_id, method,
1140 osr_bci, comp_level,
1141 hot_method, hot_count, compile_reason,
1142 blocking);
1143 }
1144
1145 if (blocking) {
1146 wait_for_completion(task);
1147 }
1148 }
1149
1150 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1151 int comp_level,
1152 const methodHandle& hot_method, int hot_count,
1153 CompileTask::CompileReason compile_reason,
1154 Thread* THREAD) {
1155 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1156 if (!_initialized || comp_level == CompLevel_none) {
1157 return NULL;
1158 }
1159
1160 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1161 assert(comp != NULL, "Ensure we have a compiler");
1162
1163 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1164 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1165 DirectivesStack::release(directive);
1166 return nm;
1167 }
1168
1169 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1170 int comp_level,
1171 const methodHandle& hot_method, int hot_count,
1172 CompileTask::CompileReason compile_reason,
1173 DirectiveSet* directive,
1174 Thread* THREAD) {
1175
1176 // make sure arguments make sense
1177 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1178 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1179 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1180 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1181 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1182 // allow any levels for WhiteBox
1183 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1184 // return quickly if possible
1185
1186 // lock, make sure that the compilation
1187 // isn't prohibited in a straightforward way.
1188 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1189 if (comp == NULL || !comp->can_compile_method(method) ||
1190 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1191 return NULL;
1192 }
1193
1194 #if INCLUDE_JVMCI
1195 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1196 return NULL;
1197 }
1198 #endif
1199
1200 if (osr_bci == InvocationEntryBci) {
1201 // standard compilation
1202 CompiledMethod* method_code = method->code();
1203 if (method_code != NULL && method_code->is_nmethod()) {
1204 if (compilation_is_complete(method, osr_bci, comp_level)) {
1205 return (nmethod*) method_code;
1206 }
1207 }
1208 if (method->is_not_compilable(comp_level)) {
1209 return NULL;
1210 }
1211 } else {
1212 // osr compilation
1213 #ifndef TIERED
1214 // seems like an assert of dubious value
1215 assert(comp_level == CompLevel_highest_tier,
1216 "all OSR compiles are assumed to be at a single compilation level");
1217 #endif // TIERED
1218 // We accept a higher level osr method
1219 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1220 if (nm != NULL) return nm;
1221 if (method->is_not_osr_compilable(comp_level)) return NULL;
1222 }
1223
1224 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1225 // some prerequisites that are compiler specific
1226 if (comp->is_c2()) {
1227 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1228 // Resolve all classes seen in the signature of the method
1229 // we are compiling.
1230 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1231 }
1232
1233 // If the method is native, do the lookup in the thread requesting
1234 // the compilation. Native lookups can load code, which is not
1235 // permitted during compilation.
1236 //
1237 // Note: A native method implies non-osr compilation which is
1238 // checked with an assertion at the entry of this method.
1239 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1240 bool in_base_library;
1241 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1242 if (HAS_PENDING_EXCEPTION) {
1243 // In case of an exception looking up the method, we just forget
1244 // about it. The interpreter will kick-in and throw the exception.
1245 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1246 CLEAR_PENDING_EXCEPTION;
1247 return NULL;
1248 }
1249 assert(method->has_native_function(), "must have native code by now");
1250 }
1251
1252 // RedefineClasses() has replaced this method; just return
1253 if (method->is_old()) {
1254 return NULL;
1255 }
1256
1257 // JVMTI -- post_compile_event requires jmethod_id() that may require
1258 // a lock the compiling thread can not acquire. Prefetch it here.
1259 if (JvmtiExport::should_post_compiled_method_load()) {
1260 method->jmethod_id();
1261 }
1262
1263 // do the compilation
1264 if (method->is_native()) {
1265 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1266 // The following native methods:
1267 //
1268 // java.lang.Float.intBitsToFloat
1269 // java.lang.Float.floatToRawIntBits
1270 // java.lang.Double.longBitsToDouble
1271 // java.lang.Double.doubleToRawLongBits
1272 //
1273 // are called through the interpreter even if interpreter native stubs
1274 // are not preferred (i.e., calling through adapter handlers is preferred).
1275 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1276 // if the version of the methods from the native libraries is called.
1277 // As the interpreter and the C2-intrinsified version of the methods preserves
1278 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1279 if ((UseSSE >= 1 &&
1280 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1281 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1282 (UseSSE >= 2 &&
1283 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1284 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1285 return NULL;
1286 }
1287
1288 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1289 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1290 //
1291 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1292 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1293 AdapterHandlerLibrary::create_native_wrapper(method);
1294 } else {
1295 return NULL;
1296 }
1297 } else {
1298 // If the compiler is shut off due to code cache getting full
1299 // fail out now so blocking compiles dont hang the java thread
1300 if (!should_compile_new_jobs()) {
1301 CompilationPolicy::policy()->delay_compilation(method());
1302 return NULL;
1303 }
1304 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1305 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1306 }
1307
1308 // return requested nmethod
1309 // We accept a higher level osr method
1310 if (osr_bci == InvocationEntryBci) {
1311 CompiledMethod* code = method->code();
1312 if (code == NULL) {
1313 return (nmethod*) code;
1314 } else {
1315 return code->as_nmethod_or_null();
1316 }
1317 }
1318 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1319 }
1320
1321
1322 // ------------------------------------------------------------------
1323 // CompileBroker::compilation_is_complete
1324 //
1325 // See if compilation of this method is already complete.
1326 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1327 int osr_bci,
1328 int comp_level) {
1329 bool is_osr = (osr_bci != standard_entry_bci);
1330 if (is_osr) {
1331 if (method->is_not_osr_compilable(comp_level)) {
1332 return true;
1333 } else {
1334 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1335 return (result != NULL);
1336 }
1337 } else {
1338 if (method->is_not_compilable(comp_level)) {
1339 return true;
1340 } else {
1341 CompiledMethod* result = method->code();
1342 if (result == NULL) return false;
1343 return comp_level == result->comp_level();
1344 }
1345 }
1346 }
1347
1348
1349 /**
1350 * See if this compilation is already requested.
1351 *
1352 * Implementation note: there is only a single "is in queue" bit
1353 * for each method. This means that the check below is overly
1354 * conservative in the sense that an osr compilation in the queue
1355 * will block a normal compilation from entering the queue (and vice
1356 * versa). This can be remedied by a full queue search to disambiguate
1357 * cases. If it is deemed profitable, this may be done.
1358 */
1359 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1360 return method->queued_for_compilation();
1361 }
1362
1363 // ------------------------------------------------------------------
1364 // CompileBroker::compilation_is_prohibited
1365 //
1366 // See if this compilation is not allowed.
1367 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1368 bool is_native = method->is_native();
1369 // Some compilers may not support the compilation of natives.
1370 AbstractCompiler *comp = compiler(comp_level);
1371 if (is_native &&
1372 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1373 method->set_not_compilable_quietly("native methods not supported", comp_level);
1374 return true;
1375 }
1376
1377 bool is_osr = (osr_bci != standard_entry_bci);
1378 // Some compilers may not support on stack replacement.
1379 if (is_osr &&
1380 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1381 method->set_not_osr_compilable("OSR not supported", comp_level);
1382 return true;
1383 }
1384
1385 // The method may be explicitly excluded by the user.
1386 double scale;
1387 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1388 bool quietly = CompilerOracle::should_exclude_quietly();
1389 if (PrintCompilation && !quietly) {
1390 // This does not happen quietly...
1391 ResourceMark rm;
1392 tty->print("### Excluding %s:%s",
1393 method->is_native() ? "generation of native wrapper" : "compile",
1394 (method->is_static() ? " static" : ""));
1395 method->print_short_name(tty);
1396 tty->cr();
1397 }
1398 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1399 }
1400
1401 return false;
1402 }
1403
1404 /**
1405 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1406 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1407 * The function also allows to generate separate compilation IDs for OSR compilations.
1408 */
1409 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1410 #ifdef ASSERT
1411 bool is_osr = (osr_bci != standard_entry_bci);
1412 int id;
1413 if (method->is_native()) {
1414 assert(!is_osr, "can't be osr");
1415 // Adapters, native wrappers and method handle intrinsics
1416 // should be generated always.
1417 return Atomic::add(1, &_compilation_id);
1418 } else if (CICountOSR && is_osr) {
1419 id = Atomic::add(1, &_osr_compilation_id);
1420 if (CIStartOSR <= id && id < CIStopOSR) {
1421 return id;
1422 }
1423 } else {
1424 id = Atomic::add(1, &_compilation_id);
1425 if (CIStart <= id && id < CIStop) {
1426 return id;
1427 }
1428 }
1429
1430 // Method was not in the appropriate compilation range.
1431 method->set_not_compilable_quietly("Not in requested compile id range");
1432 return 0;
1433 #else
1434 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1435 // only _compilation_id is incremented.
1436 return Atomic::add(1, &_compilation_id);
1437 #endif
1438 }
1439
1440 // ------------------------------------------------------------------
1441 // CompileBroker::assign_compile_id_unlocked
1442 //
1443 // Public wrapper for assign_compile_id that acquires the needed locks
1444 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1445 MutexLocker locker(MethodCompileQueue_lock, thread);
1446 return assign_compile_id(method, osr_bci);
1447 }
1448
1449 // ------------------------------------------------------------------
1450 // CompileBroker::preload_classes
1451 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1452 // Move this code over from c1_Compiler.cpp
1453 ShouldNotReachHere();
1454 }
1455
1456
1457 // ------------------------------------------------------------------
1458 // CompileBroker::create_compile_task
1459 //
1460 // Create a CompileTask object representing the current request for
1461 // compilation. Add this task to the queue.
1462 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1463 int compile_id,
1464 const methodHandle& method,
1465 int osr_bci,
1466 int comp_level,
1467 const methodHandle& hot_method,
1468 int hot_count,
1469 CompileTask::CompileReason compile_reason,
1470 bool blocking) {
1471 CompileTask* new_task = CompileTask::allocate();
1472 new_task->initialize(compile_id, method, osr_bci, comp_level,
1473 hot_method, hot_count, compile_reason,
1474 blocking);
1475 queue->add(new_task);
1476 return new_task;
1477 }
1478
1479 #if INCLUDE_JVMCI
1480 // The number of milliseconds to wait before checking if
1481 // JVMCI compilation has made progress.
1482 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1483
1484 // The number of JVMCI compilation progress checks that must fail
1485 // before unblocking a thread waiting for a blocking compilation.
1486 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1487
1488 /**
1489 * Waits for a JVMCI compiler to complete a given task. This thread
1490 * waits until either the task completes or it sees no JVMCI compilation
1491 * progress for N consecutive milliseconds where N is
1492 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1493 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1494 *
1495 * @return true if this thread needs to free/recycle the task
1496 */
1497 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1498 MonitorLocker ml(task->lock(), thread);
1499 int progress_wait_attempts = 0;
1500 int methods_compiled = jvmci->methods_compiled();
1501 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1502 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1503 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1504
1505 bool progress;
1506 if (jvmci_compiler_thread != NULL) {
1507 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1508 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1509 !jvmci_compiler_thread->is_external_suspend();
1510 } else {
1511 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1512 // that all JVMCI compiler threads are blocked on. We use the counter for
1513 // successful JVMCI compilations to determine whether JVMCI compilation
1514 // is still making progress through the JVMCI compiler queue.
1515 progress = jvmci->methods_compiled() != methods_compiled;
1516 }
1517
1518 if (!progress) {
1519 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1520 if (PrintCompilation) {
1521 task->print(tty, "wait for blocking compilation timed out");
1522 }
1523 break;
1524 }
1525 } else {
1526 progress_wait_attempts = 0;
1527 if (jvmci_compiler_thread == NULL) {
1528 methods_compiled = jvmci->methods_compiled();
1529 }
1530 }
1531 }
1532 task->clear_waiter();
1533 return task->is_complete();
1534 }
1535 #endif
1536
1537 /**
1538 * Wait for the compilation task to complete.
1539 */
1540 void CompileBroker::wait_for_completion(CompileTask* task) {
1541 if (CIPrintCompileQueue) {
1542 ttyLocker ttyl;
1543 tty->print_cr("BLOCKING FOR COMPILE");
1544 }
1545
1546 assert(task->is_blocking(), "can only wait on blocking task");
1547
1548 JavaThread* thread = JavaThread::current();
1549
1550 methodHandle method(thread, task->method());
1551 bool free_task;
1552 #if INCLUDE_JVMCI
1553 AbstractCompiler* comp = compiler(task->comp_level());
1554 if (comp->is_jvmci()) {
1555 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1556 } else
1557 #endif
1558 {
1559 MonitorLocker ml(task->lock(), thread);
1560 free_task = true;
1561 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1562 ml.wait();
1563 }
1564 }
1565
1566 if (free_task) {
1567 if (is_compilation_disabled_forever()) {
1568 CompileTask::free(task);
1569 return;
1570 }
1571
1572 // It is harmless to check this status without the lock, because
1573 // completion is a stable property (until the task object is recycled).
1574 assert(task->is_complete(), "Compilation should have completed");
1575 assert(task->code_handle() == NULL, "must be reset");
1576
1577 // By convention, the waiter is responsible for recycling a
1578 // blocking CompileTask. Since there is only one waiter ever
1579 // waiting on a CompileTask, we know that no one else will
1580 // be using this CompileTask; we can free it.
1581 CompileTask::free(task);
1582 }
1583 }
1584
1585 /**
1586 * Initialize compiler thread(s) + compiler object(s). The postcondition
1587 * of this function is that the compiler runtimes are initialized and that
1588 * compiler threads can start compiling.
1589 */
1590 bool CompileBroker::init_compiler_runtime() {
1591 CompilerThread* thread = CompilerThread::current();
1592 AbstractCompiler* comp = thread->compiler();
1593 // Final sanity check - the compiler object must exist
1594 guarantee(comp != NULL, "Compiler object must exist");
1595
1596 {
1597 // Must switch to native to allocate ci_env
1598 ThreadToNativeFromVM ttn(thread);
1599 ciEnv ci_env((CompileTask*)NULL);
1600 // Cache Jvmti state
1601 ci_env.cache_jvmti_state();
1602 // Cache DTrace flags
1603 ci_env.cache_dtrace_flags();
1604
1605 // Switch back to VM state to do compiler initialization
1606 ThreadInVMfromNative tv(thread);
1607 ResetNoHandleMark rnhm;
1608
1609 // Perform per-thread and global initializations
1610 comp->initialize();
1611 }
1612
1613 if (comp->is_failed()) {
1614 disable_compilation_forever();
1615 // If compiler initialization failed, no compiler thread that is specific to a
1616 // particular compiler runtime will ever start to compile methods.
1617 shutdown_compiler_runtime(comp, thread);
1618 return false;
1619 }
1620
1621 // C1 specific check
1622 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1623 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1624 return false;
1625 }
1626
1627 return true;
1628 }
1629
1630 /**
1631 * If C1 and/or C2 initialization failed, we shut down all compilation.
1632 * We do this to keep things simple. This can be changed if it ever turns
1633 * out to be a problem.
1634 */
1635 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1636 // Free buffer blob, if allocated
1637 if (thread->get_buffer_blob() != NULL) {
1638 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1639 CodeCache::free(thread->get_buffer_blob());
1640 }
1641
1642 if (comp->should_perform_shutdown()) {
1643 // There are two reasons for shutting down the compiler
1644 // 1) compiler runtime initialization failed
1645 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1646 warning("%s initialization failed. Shutting down all compilers", comp->name());
1647
1648 // Only one thread per compiler runtime object enters here
1649 // Set state to shut down
1650 comp->set_shut_down();
1651
1652 // Delete all queued compilation tasks to make compiler threads exit faster.
1653 if (_c1_compile_queue != NULL) {
1654 _c1_compile_queue->free_all();
1655 }
1656
1657 if (_c2_compile_queue != NULL) {
1658 _c2_compile_queue->free_all();
1659 }
1660
1661 // Set flags so that we continue execution with using interpreter only.
1662 UseCompiler = false;
1663 UseInterpreter = true;
1664
1665 // We could delete compiler runtimes also. However, there are references to
1666 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1667 // fail. This can be done later if necessary.
1668 }
1669 }
1670
1671 /**
1672 * Helper function to create new or reuse old CompileLog.
1673 */
1674 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1675 if (!LogCompilation) return NULL;
1676
1677 AbstractCompiler *compiler = ct->compiler();
1678 bool c1 = compiler->is_c1();
1679 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1680 assert(compiler_objects != NULL, "must be initialized at this point");
1681 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1682 assert(logs != NULL, "must be initialized at this point");
1683 int count = c1 ? _c1_count : _c2_count;
1684
1685 // Find Compiler number by its threadObj.
1686 oop compiler_obj = ct->threadObj();
1687 int compiler_number = 0;
1688 bool found = false;
1689 for (; compiler_number < count; compiler_number++) {
1690 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) {
1691 found = true;
1692 break;
1693 }
1694 }
1695 assert(found, "Compiler must exist at this point");
1696
1697 // Determine pointer for this thread's log.
1698 CompileLog** log_ptr = &logs[compiler_number];
1699
1700 // Return old one if it exists.
1701 CompileLog* log = *log_ptr;
1702 if (log != NULL) {
1703 ct->init_log(log);
1704 return log;
1705 }
1706
1707 // Create a new one and remember it.
1708 init_compiler_thread_log();
1709 log = ct->log();
1710 *log_ptr = log;
1711 return log;
1712 }
1713
1714 // ------------------------------------------------------------------
1715 // CompileBroker::compiler_thread_loop
1716 //
1717 // The main loop run by a CompilerThread.
1718 void CompileBroker::compiler_thread_loop() {
1719 CompilerThread* thread = CompilerThread::current();
1720 CompileQueue* queue = thread->queue();
1721 // For the thread that initializes the ciObjectFactory
1722 // this resource mark holds all the shared objects
1723 ResourceMark rm;
1724
1725 // First thread to get here will initialize the compiler interface
1726
1727 {
1728 ASSERT_IN_VM;
1729 MutexLocker only_one (CompileThread_lock, thread);
1730 if (!ciObjectFactory::is_initialized()) {
1731 ciObjectFactory::initialize();
1732 }
1733 }
1734
1735 // Open a log.
1736 CompileLog* log = get_log(thread);
1737 if (log != NULL) {
1738 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1739 thread->name(),
1740 os::current_thread_id(),
1741 os::current_process_id());
1742 log->stamp();
1743 log->end_elem();
1744 }
1745
1746 // If compiler thread/runtime initialization fails, exit the compiler thread
1747 if (!init_compiler_runtime()) {
1748 return;
1749 }
1750
1751 thread->start_idle_timer();
1752
1753 // Poll for new compilation tasks as long as the JVM runs. Compilation
1754 // should only be disabled if something went wrong while initializing the
1755 // compiler runtimes. This, in turn, should not happen. The only known case
1756 // when compiler runtime initialization fails is if there is not enough free
1757 // space in the code cache to generate the necessary stubs, etc.
1758 while (!is_compilation_disabled_forever()) {
1759 // We need this HandleMark to avoid leaking VM handles.
1760 HandleMark hm(thread);
1761
1762 CompileTask* task = queue->get();
1763 if (task == NULL) {
1764 if (UseDynamicNumberOfCompilerThreads) {
1765 // Access compiler_count under lock to enforce consistency.
1766 MutexLocker only_one(CompileThread_lock);
1767 if (can_remove(thread, true)) {
1768 if (TraceCompilerThreads) {
1769 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1770 thread->name(), thread->idle_time_millis());
1771 }
1772 // Free buffer blob, if allocated
1773 if (thread->get_buffer_blob() != NULL) {
1774 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1775 CodeCache::free(thread->get_buffer_blob());
1776 }
1777 return; // Stop this thread.
1778 }
1779 }
1780 } else {
1781 // Assign the task to the current thread. Mark this compilation
1782 // thread as active for the profiler.
1783 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1784 // occurs after fetching the compile task off the queue.
1785 CompileTaskWrapper ctw(task);
1786 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1787 task->set_code_handle(&result_handle);
1788 methodHandle method(thread, task->method());
1789
1790 // Never compile a method if breakpoints are present in it
1791 if (method()->number_of_breakpoints() == 0) {
1792 // Compile the method.
1793 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1794 invoke_compiler_on_method(task);
1795 thread->start_idle_timer();
1796 } else {
1797 // After compilation is disabled, remove remaining methods from queue
1798 method->clear_queued_for_compilation();
1799 task->set_failure_reason("compilation is disabled");
1800 }
1801 }
1802
1803 if (UseDynamicNumberOfCompilerThreads) {
1804 possibly_add_compiler_threads();
1805 }
1806 }
1807 }
1808
1809 // Shut down compiler runtime
1810 shutdown_compiler_runtime(thread->compiler(), thread);
1811 }
1812
1813 // ------------------------------------------------------------------
1814 // CompileBroker::init_compiler_thread_log
1815 //
1816 // Set up state required by +LogCompilation.
1817 void CompileBroker::init_compiler_thread_log() {
1818 CompilerThread* thread = CompilerThread::current();
1819 char file_name[4*K];
1820 FILE* fp = NULL;
1821 intx thread_id = os::current_thread_id();
1822 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1823 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1824 if (dir == NULL) {
1825 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1826 thread_id, os::current_process_id());
1827 } else {
1828 jio_snprintf(file_name, sizeof(file_name),
1829 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1830 os::file_separator(), thread_id, os::current_process_id());
1831 }
1832
1833 fp = fopen(file_name, "wt");
1834 if (fp != NULL) {
1835 if (LogCompilation && Verbose) {
1836 tty->print_cr("Opening compilation log %s", file_name);
1837 }
1838 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1839 if (log == NULL) {
1840 fclose(fp);
1841 return;
1842 }
1843 thread->init_log(log);
1844
1845 if (xtty != NULL) {
1846 ttyLocker ttyl;
1847 // Record any per thread log files
1848 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1849 }
1850 return;
1851 }
1852 }
1853 warning("Cannot open log file: %s", file_name);
1854 }
1855
1856 void CompileBroker::log_metaspace_failure() {
1857 const char* message = "some methods may not be compiled because metaspace "
1858 "is out of memory";
1859 if (_compilation_log != NULL) {
1860 _compilation_log->log_metaspace_failure(message);
1861 }
1862 if (PrintCompilation) {
1863 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1864 }
1865 }
1866
1867
1868 // ------------------------------------------------------------------
1869 // CompileBroker::set_should_block
1870 //
1871 // Set _should_block.
1872 // Call this from the VM, with Threads_lock held and a safepoint requested.
1873 void CompileBroker::set_should_block() {
1874 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1875 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1876 #ifndef PRODUCT
1877 if (PrintCompilation && (Verbose || WizardMode))
1878 tty->print_cr("notifying compiler thread pool to block");
1879 #endif
1880 _should_block = true;
1881 }
1882
1883 // ------------------------------------------------------------------
1884 // CompileBroker::maybe_block
1885 //
1886 // Call this from the compiler at convenient points, to poll for _should_block.
1887 void CompileBroker::maybe_block() {
1888 if (_should_block) {
1889 #ifndef PRODUCT
1890 if (PrintCompilation && (Verbose || WizardMode))
1891 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1892 #endif
1893 ThreadInVMfromNative tivfn(JavaThread::current());
1894 }
1895 }
1896
1897 // wrapper for CodeCache::print_summary()
1898 static void codecache_print(bool detailed)
1899 {
1900 ResourceMark rm;
1901 stringStream s;
1902 // Dump code cache into a buffer before locking the tty,
1903 {
1904 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1905 CodeCache::print_summary(&s, detailed);
1906 }
1907 ttyLocker ttyl;
1908 tty->print("%s", s.as_string());
1909 }
1910
1911 // wrapper for CodeCache::print_summary() using outputStream
1912 static void codecache_print(outputStream* out, bool detailed) {
1913 ResourceMark rm;
1914 stringStream s;
1915
1916 // Dump code cache into a buffer
1917 {
1918 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1919 CodeCache::print_summary(&s, detailed);
1920 }
1921
1922 char* remaining_log = s.as_string();
1923 while (*remaining_log != '\0') {
1924 char* eol = strchr(remaining_log, '\n');
1925 if (eol == NULL) {
1926 out->print_cr("%s", remaining_log);
1927 remaining_log = remaining_log + strlen(remaining_log);
1928 } else {
1929 *eol = '\0';
1930 out->print_cr("%s", remaining_log);
1931 remaining_log = eol + 1;
1932 }
1933 }
1934 }
1935
1936 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
1937 int compilable, const char* failure_reason) {
1938 if (success) {
1939 task->mark_success();
1940 if (ci_env != NULL) {
1941 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1942 }
1943 if (_compilation_log != NULL) {
1944 nmethod* code = task->code();
1945 if (code != NULL) {
1946 _compilation_log->log_nmethod(thread, code);
1947 }
1948 }
1949 } else if (AbortVMOnCompilationFailure) {
1950 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1951 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
1952 }
1953 if (compilable == ciEnv::MethodCompilable_never) {
1954 fatal("Never compilable: %s", failure_reason);
1955 }
1956 }
1957 // simulate crash during compilation
1958 assert(task->compile_id() != CICrashAt, "just as planned");
1959 }
1960
1961 static void post_compilation_event(EventCompilation* event, CompileTask* task) {
1962 assert(event != NULL, "invariant");
1963 assert(event->should_commit(), "invariant");
1964 event->set_method(task->method());
1965 event->set_compileId(task->compile_id());
1966 event->set_compileLevel(task->comp_level());
1967 event->set_succeded(task->is_success());
1968 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1969 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1970 event->set_inlinedBytes(task->num_inlined_bytecodes());
1971 event->commit();
1972 }
1973
1974 int DirectivesStack::_depth = 0;
1975 CompilerDirectives* DirectivesStack::_top = NULL;
1976 CompilerDirectives* DirectivesStack::_bottom = NULL;
1977
1978 // ------------------------------------------------------------------
1979 // CompileBroker::invoke_compiler_on_method
1980 //
1981 // Compile a method.
1982 //
1983 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1984 task->print_ul();
1985 if (PrintCompilation) {
1986 ResourceMark rm;
1987 task->print_tty();
1988 }
1989 elapsedTimer time;
1990
1991 CompilerThread* thread = CompilerThread::current();
1992 ResourceMark rm(thread);
1993
1994 if (LogEvents) {
1995 _compilation_log->log_compile(thread, task);
1996 }
1997
1998 // Common flags.
1999 uint compile_id = task->compile_id();
2000 int osr_bci = task->osr_bci();
2001 bool is_osr = (osr_bci != standard_entry_bci);
2002 bool should_log = (thread->log() != NULL);
2003 bool should_break = false;
2004 const int task_level = task->comp_level();
2005 AbstractCompiler* comp = task->compiler();
2006
2007 DirectiveSet* directive;
2008 {
2009 // create the handle inside it's own block so it can't
2010 // accidentally be referenced once the thread transitions to
2011 // native. The NoHandleMark before the transition should catch
2012 // any cases where this occurs in the future.
2013 methodHandle method(thread, task->method());
2014 assert(!method->is_native(), "no longer compile natives");
2015
2016 // Look up matching directives
2017 directive = DirectivesStack::getMatchingDirective(method, comp);
2018
2019 // Update compile information when using perfdata.
2020 if (UsePerfData) {
2021 update_compile_perf_data(thread, method, is_osr);
2022 }
2023
2024 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2025 }
2026
2027 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2028 if (should_log && !directive->LogOption) {
2029 should_log = false;
2030 }
2031
2032 // Allocate a new set of JNI handles.
2033 push_jni_handle_block();
2034 Method* target_handle = task->method();
2035 int compilable = ciEnv::MethodCompilable;
2036 const char* failure_reason = NULL;
2037 bool failure_reason_on_C_heap = false;
2038 const char* retry_message = NULL;
2039
2040 #if INCLUDE_JVMCI
2041 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2042 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2043
2044 TraceTime t1("compilation", &time);
2045 EventCompilation event;
2046
2047 // Skip redefined methods
2048 if (target_handle->is_old()) {
2049 failure_reason = "redefined method";
2050 retry_message = "not retryable";
2051 compilable = ciEnv::MethodCompilable_never;
2052 } else {
2053 JVMCICompileState compile_state(task);
2054 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2055 methodHandle method(thread, target_handle);
2056 env.runtime()->compile_method(&env, jvmci, method, osr_bci);
2057
2058 failure_reason = compile_state.failure_reason();
2059 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2060 if (!compile_state.retryable()) {
2061 retry_message = "not retryable";
2062 compilable = ciEnv::MethodCompilable_not_at_tier;
2063 }
2064 if (task->code() == NULL) {
2065 assert(failure_reason != NULL, "must specify failure_reason");
2066 }
2067 }
2068 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2069 if (event.should_commit()) {
2070 post_compilation_event(&event, task);
2071 }
2072
2073 } else
2074 #endif // INCLUDE_JVMCI
2075 {
2076 NoHandleMark nhm;
2077 ThreadToNativeFromVM ttn(thread);
2078
2079 ciEnv ci_env(task);
2080 if (should_break) {
2081 ci_env.set_break_at_compile(true);
2082 }
2083 if (should_log) {
2084 ci_env.set_log(thread->log());
2085 }
2086 assert(thread->env() == &ci_env, "set by ci_env");
2087 // The thread-env() field is cleared in ~CompileTaskWrapper.
2088
2089 // Cache Jvmti state
2090 ci_env.cache_jvmti_state();
2091
2092 // Cache DTrace flags
2093 ci_env.cache_dtrace_flags();
2094
2095 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2096
2097 TraceTime t1("compilation", &time);
2098 EventCompilation event;
2099
2100 if (comp == NULL) {
2101 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2102 } else {
2103 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2104 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2105 while (WhiteBox::compilation_locked) {
2106 locker.wait();
2107 }
2108 }
2109 comp->compile_method(&ci_env, target, osr_bci, directive);
2110 }
2111
2112 if (!ci_env.failing() && task->code() == NULL) {
2113 //assert(false, "compiler should always document failure");
2114 // The compiler elected, without comment, not to register a result.
2115 // Do not attempt further compilations of this method.
2116 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2117 }
2118
2119 // Copy this bit to the enclosing block:
2120 compilable = ci_env.compilable();
2121
2122 if (ci_env.failing()) {
2123 failure_reason = ci_env.failure_reason();
2124 retry_message = ci_env.retry_message();
2125 ci_env.report_failure(failure_reason);
2126 }
2127
2128 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2129 if (event.should_commit()) {
2130 post_compilation_event(&event, task);
2131 }
2132 }
2133 // Remove the JNI handle block after the ciEnv destructor has run in
2134 // the previous block.
2135 pop_jni_handle_block();
2136
2137 if (failure_reason != NULL) {
2138 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2139 if (_compilation_log != NULL) {
2140 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2141 }
2142 if (PrintCompilation) {
2143 FormatBufferResource msg = retry_message != NULL ?
2144 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2145 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2146 task->print(tty, msg);
2147 }
2148 }
2149
2150 methodHandle method(thread, task->method());
2151
2152 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2153
2154 collect_statistics(thread, time, task);
2155
2156 nmethod* nm = task->code();
2157 if (nm != NULL) {
2158 nm->maybe_print_nmethod(directive);
2159 }
2160 DirectivesStack::release(directive);
2161
2162 if (PrintCompilation && PrintCompilation2) {
2163 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2164 tty->print("%4d ", compile_id); // print compilation number
2165 tty->print("%s ", (is_osr ? "%" : " "));
2166 if (task->code() != NULL) {
2167 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2168 }
2169 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2170 }
2171
2172 Log(compilation, codecache) log;
2173 if (log.is_debug()) {
2174 LogStream ls(log.debug());
2175 codecache_print(&ls, /* detailed= */ false);
2176 }
2177 if (PrintCodeCacheOnCompilation) {
2178 codecache_print(/* detailed= */ false);
2179 }
2180 // Disable compilation, if required.
2181 switch (compilable) {
2182 case ciEnv::MethodCompilable_never:
2183 if (is_osr)
2184 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2185 else
2186 method->set_not_compilable_quietly("MethodCompilable_never");
2187 break;
2188 case ciEnv::MethodCompilable_not_at_tier:
2189 if (is_osr)
2190 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2191 else
2192 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2193 break;
2194 }
2195
2196 // Note that the queued_for_compilation bits are cleared without
2197 // protection of a mutex. [They were set by the requester thread,
2198 // when adding the task to the compile queue -- at which time the
2199 // compile queue lock was held. Subsequently, we acquired the compile
2200 // queue lock to get this task off the compile queue; thus (to belabour
2201 // the point somewhat) our clearing of the bits must be occurring
2202 // only after the setting of the bits. See also 14012000 above.
2203 method->clear_queued_for_compilation();
2204 }
2205
2206 /**
2207 * The CodeCache is full. Print warning and disable compilation.
2208 * Schedule code cache cleaning so compilation can continue later.
2209 * This function needs to be called only from CodeCache::allocate(),
2210 * since we currently handle a full code cache uniformly.
2211 */
2212 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2213 UseInterpreter = true;
2214 if (UseCompiler || AlwaysCompileLoopMethods ) {
2215 if (xtty != NULL) {
2216 ResourceMark rm;
2217 stringStream s;
2218 // Dump code cache state into a buffer before locking the tty,
2219 // because log_state() will use locks causing lock conflicts.
2220 CodeCache::log_state(&s);
2221 // Lock to prevent tearing
2222 ttyLocker ttyl;
2223 xtty->begin_elem("code_cache_full");
2224 xtty->print("%s", s.as_string());
2225 xtty->stamp();
2226 xtty->end_elem();
2227 }
2228
2229 #ifndef PRODUCT
2230 if (ExitOnFullCodeCache) {
2231 codecache_print(/* detailed= */ true);
2232 before_exit(JavaThread::current());
2233 exit_globals(); // will delete tty
2234 vm_direct_exit(1);
2235 }
2236 #endif
2237 if (UseCodeCacheFlushing) {
2238 // Since code cache is full, immediately stop new compiles
2239 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2240 NMethodSweeper::log_sweep("disable_compiler");
2241 }
2242 } else {
2243 disable_compilation_forever();
2244 }
2245
2246 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2247 }
2248 }
2249
2250 // ------------------------------------------------------------------
2251 // CompileBroker::update_compile_perf_data
2252 //
2253 // Record this compilation for debugging purposes.
2254 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2255 ResourceMark rm;
2256 char* method_name = method->name()->as_C_string();
2257 char current_method[CompilerCounters::cmname_buffer_length];
2258 size_t maxLen = CompilerCounters::cmname_buffer_length;
2259
2260 const char* class_name = method->method_holder()->name()->as_C_string();
2261
2262 size_t s1len = strlen(class_name);
2263 size_t s2len = strlen(method_name);
2264
2265 // check if we need to truncate the string
2266 if (s1len + s2len + 2 > maxLen) {
2267
2268 // the strategy is to lop off the leading characters of the
2269 // class name and the trailing characters of the method name.
2270
2271 if (s2len + 2 > maxLen) {
2272 // lop of the entire class name string, let snprintf handle
2273 // truncation of the method name.
2274 class_name += s1len; // null string
2275 }
2276 else {
2277 // lop off the extra characters from the front of the class name
2278 class_name += ((s1len + s2len + 2) - maxLen);
2279 }
2280 }
2281
2282 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2283
2284 int last_compile_type = normal_compile;
2285 if (CICountOSR && is_osr) {
2286 last_compile_type = osr_compile;
2287 }
2288
2289 CompilerCounters* counters = thread->counters();
2290 counters->set_current_method(current_method);
2291 counters->set_compile_type((jlong) last_compile_type);
2292 }
2293
2294 // ------------------------------------------------------------------
2295 // CompileBroker::push_jni_handle_block
2296 //
2297 // Push on a new block of JNI handles.
2298 void CompileBroker::push_jni_handle_block() {
2299 JavaThread* thread = JavaThread::current();
2300
2301 // Allocate a new block for JNI handles.
2302 // Inlined code from jni_PushLocalFrame()
2303 JNIHandleBlock* java_handles = thread->active_handles();
2304 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2305 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2306 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2307 thread->set_active_handles(compile_handles);
2308 }
2309
2310
2311 // ------------------------------------------------------------------
2312 // CompileBroker::pop_jni_handle_block
2313 //
2314 // Pop off the current block of JNI handles.
2315 void CompileBroker::pop_jni_handle_block() {
2316 JavaThread* thread = JavaThread::current();
2317
2318 // Release our JNI handle block
2319 JNIHandleBlock* compile_handles = thread->active_handles();
2320 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2321 thread->set_active_handles(java_handles);
2322 compile_handles->set_pop_frame_link(NULL);
2323 JNIHandleBlock::release_block(compile_handles, thread); // may block
2324 }
2325
2326 // ------------------------------------------------------------------
2327 // CompileBroker::collect_statistics
2328 //
2329 // Collect statistics about the compilation.
2330
2331 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2332 bool success = task->is_success();
2333 methodHandle method (thread, task->method());
2334 uint compile_id = task->compile_id();
2335 bool is_osr = (task->osr_bci() != standard_entry_bci);
2336 nmethod* code = task->code();
2337 CompilerCounters* counters = thread->counters();
2338
2339 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2340 MutexLocker locker(CompileStatistics_lock);
2341
2342 // _perf variables are production performance counters which are
2343 // updated regardless of the setting of the CITime and CITimeEach flags
2344 //
2345
2346 // account all time, including bailouts and failures in this counter;
2347 // C1 and C2 counters are counting both successful and unsuccessful compiles
2348 _t_total_compilation.add(time);
2349
2350 if (!success) {
2351 _total_bailout_count++;
2352 if (UsePerfData) {
2353 _perf_last_failed_method->set_value(counters->current_method());
2354 _perf_last_failed_type->set_value(counters->compile_type());
2355 _perf_total_bailout_count->inc();
2356 }
2357 _t_bailedout_compilation.add(time);
2358 } else if (code == NULL) {
2359 if (UsePerfData) {
2360 _perf_last_invalidated_method->set_value(counters->current_method());
2361 _perf_last_invalidated_type->set_value(counters->compile_type());
2362 _perf_total_invalidated_count->inc();
2363 }
2364 _total_invalidated_count++;
2365 _t_invalidated_compilation.add(time);
2366 } else {
2367 // Compilation succeeded
2368
2369 // update compilation ticks - used by the implementation of
2370 // java.lang.management.CompilationMBean
2371 _perf_total_compilation->inc(time.ticks());
2372 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2373
2374 if (CITime) {
2375 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2376 if (is_osr) {
2377 _t_osr_compilation.add(time);
2378 _sum_osr_bytes_compiled += bytes_compiled;
2379 } else {
2380 _t_standard_compilation.add(time);
2381 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2382 }
2383
2384 #if INCLUDE_JVMCI
2385 AbstractCompiler* comp = compiler(task->comp_level());
2386 if (comp) {
2387 CompilerStatistics* stats = comp->stats();
2388 if (stats) {
2389 if (is_osr) {
2390 stats->_osr.update(time, bytes_compiled);
2391 } else {
2392 stats->_standard.update(time, bytes_compiled);
2393 }
2394 stats->_nmethods_size += code->total_size();
2395 stats->_nmethods_code_size += code->insts_size();
2396 } else { // if (!stats)
2397 assert(false, "Compiler statistics object must exist");
2398 }
2399 } else { // if (!comp)
2400 assert(false, "Compiler object must exist");
2401 }
2402 #endif // INCLUDE_JVMCI
2403 }
2404
2405 if (UsePerfData) {
2406 // save the name of the last method compiled
2407 _perf_last_method->set_value(counters->current_method());
2408 _perf_last_compile_type->set_value(counters->compile_type());
2409 _perf_last_compile_size->set_value(method->code_size() +
2410 task->num_inlined_bytecodes());
2411 if (is_osr) {
2412 _perf_osr_compilation->inc(time.ticks());
2413 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2414 } else {
2415 _perf_standard_compilation->inc(time.ticks());
2416 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2417 }
2418 }
2419
2420 if (CITimeEach) {
2421 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2422 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2423 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2424 }
2425
2426 // Collect counts of successful compilations
2427 _sum_nmethod_size += code->total_size();
2428 _sum_nmethod_code_size += code->insts_size();
2429 _total_compile_count++;
2430
2431 if (UsePerfData) {
2432 _perf_sum_nmethod_size->inc( code->total_size());
2433 _perf_sum_nmethod_code_size->inc(code->insts_size());
2434 _perf_total_compile_count->inc();
2435 }
2436
2437 if (is_osr) {
2438 if (UsePerfData) _perf_total_osr_compile_count->inc();
2439 _total_osr_compile_count++;
2440 } else {
2441 if (UsePerfData) _perf_total_standard_compile_count->inc();
2442 _total_standard_compile_count++;
2443 }
2444 }
2445 // set the current method for the thread to null
2446 if (UsePerfData) counters->set_current_method("");
2447 }
2448
2449 const char* CompileBroker::compiler_name(int comp_level) {
2450 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2451 if (comp == NULL) {
2452 return "no compiler";
2453 } else {
2454 return (comp->name());
2455 }
2456 }
2457
2458 #if INCLUDE_JVMCI
2459 void CompileBroker::print_times(AbstractCompiler* comp) {
2460 CompilerStatistics* stats = comp->stats();
2461 if (stats) {
2462 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}",
2463 comp->name(), stats->bytes_per_second(),
2464 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2465 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2466 stats->_nmethods_size, stats->_nmethods_code_size);
2467 } else { // if (!stats)
2468 assert(false, "Compiler statistics object must exist");
2469 }
2470 comp->print_timers();
2471 }
2472 #endif // INCLUDE_JVMCI
2473
2474 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2475 #if INCLUDE_JVMCI
2476 elapsedTimer standard_compilation;
2477 elapsedTimer total_compilation;
2478 elapsedTimer osr_compilation;
2479
2480 int standard_bytes_compiled = 0;
2481 int osr_bytes_compiled = 0;
2482
2483 int standard_compile_count = 0;
2484 int osr_compile_count = 0;
2485 int total_compile_count = 0;
2486
2487 int nmethods_size = 0;
2488 int nmethods_code_size = 0;
2489 bool printedHeader = false;
2490
2491 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2492 AbstractCompiler* comp = _compilers[i];
2493 if (comp != NULL) {
2494 if (per_compiler && aggregate && !printedHeader) {
2495 printedHeader = true;
2496 tty->cr();
2497 tty->print_cr("Individual compiler times (for compiled methods only)");
2498 tty->print_cr("------------------------------------------------");
2499 tty->cr();
2500 }
2501 CompilerStatistics* stats = comp->stats();
2502
2503 if (stats) {
2504 standard_compilation.add(stats->_standard._time);
2505 osr_compilation.add(stats->_osr._time);
2506
2507 standard_bytes_compiled += stats->_standard._bytes;
2508 osr_bytes_compiled += stats->_osr._bytes;
2509
2510 standard_compile_count += stats->_standard._count;
2511 osr_compile_count += stats->_osr._count;
2512
2513 nmethods_size += stats->_nmethods_size;
2514 nmethods_code_size += stats->_nmethods_code_size;
2515 } else { // if (!stats)
2516 assert(false, "Compiler statistics object must exist");
2517 }
2518
2519 if (per_compiler) {
2520 print_times(comp);
2521 }
2522 }
2523 }
2524 total_compile_count = osr_compile_count + standard_compile_count;
2525 total_compilation.add(osr_compilation);
2526 total_compilation.add(standard_compilation);
2527
2528 // In hosted mode, print the JVMCI compiler specific counters manually.
2529 if (!UseJVMCICompiler) {
2530 JVMCICompiler::print_compilation_timers();
2531 }
2532 #else // INCLUDE_JVMCI
2533 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2534 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2535 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2536
2537 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2538 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2539
2540 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2541 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2542 int total_compile_count = CompileBroker::_total_compile_count;
2543
2544 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2545 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2546 #endif // INCLUDE_JVMCI
2547
2548 if (!aggregate) {
2549 return;
2550 }
2551 tty->cr();
2552 tty->print_cr("Accumulated compiler times");
2553 tty->print_cr("----------------------------------------------------------");
2554 //0000000000111111111122222222223333333333444444444455555555556666666666
2555 //0123456789012345678901234567890123456789012345678901234567890123456789
2556 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2557 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2558 standard_compilation.seconds(),
2559 standard_compilation.seconds() / standard_compile_count);
2560 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2561 CompileBroker::_t_bailedout_compilation.seconds(),
2562 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2563 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2564 osr_compilation.seconds(),
2565 osr_compilation.seconds() / osr_compile_count);
2566 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2567 CompileBroker::_t_invalidated_compilation.seconds(),
2568 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2569
2570 AbstractCompiler *comp = compiler(CompLevel_simple);
2571 if (comp != NULL) {
2572 tty->cr();
2573 comp->print_timers();
2574 }
2575 comp = compiler(CompLevel_full_optimization);
2576 if (comp != NULL) {
2577 tty->cr();
2578 comp->print_timers();
2579 }
2580 tty->cr();
2581 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2582 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2583 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2584 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2585 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2586 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2587 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2588 double tcs = total_compilation.seconds();
2589 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2590 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2591 tty->cr();
2592 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2593 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2594 }
2595
2596 // Print general/accumulated JIT information.
2597 void CompileBroker::print_info(outputStream *out) {
2598 if (out == NULL) out = tty;
2599 out->cr();
2600 out->print_cr("======================");
2601 out->print_cr(" General JIT info ");
2602 out->print_cr("======================");
2603 out->cr();
2604 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2605 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2606 out->cr();
2607 out->print_cr("CodeCache overview");
2608 out->print_cr("--------------------------------------------------------");
2609 out->cr();
2610 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2611 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2612 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2613 out->cr();
2614
2615 out->cr();
2616 out->print_cr("CodeCache cleaning overview");
2617 out->print_cr("--------------------------------------------------------");
2618 out->cr();
2619 NMethodSweeper::print(out);
2620 out->print_cr("--------------------------------------------------------");
2621 out->cr();
2622 }
2623
2624 // Note: tty_lock must not be held upon entry to this function.
2625 // Print functions called from herein do "micro-locking" on tty_lock.
2626 // That's a tradeoff which keeps together important blocks of output.
2627 // At the same time, continuous tty_lock hold time is kept in check,
2628 // preventing concurrently printing threads from stalling a long time.
2629 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
2630 TimeStamp ts_total;
2631 TimeStamp ts_global;
2632 TimeStamp ts;
2633
2634 bool allFun = !strcmp(function, "all");
2635 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2636 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2637 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2638 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2639 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2640 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2641 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2642 bool discard = !strcmp(function, "discard") || allFun;
2643
2644 if (out == NULL) {
2645 out = tty;
2646 }
2647
2648 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2649 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2650 out->cr();
2651 return;
2652 }
2653
2654 ts_total.update(); // record starting point
2655
2656 if (aggregate) {
2657 print_info(out);
2658 }
2659
2660 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2661 // That prevents another thread from destroying our view on the CodeHeap.
2662 // When we request individual parts of the analysis via the jcmd interface, it is possible
2663 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2664 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2665 // across user interaction.
2666 // Acquire this lock before acquiring the CodeCache_lock.
2667 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2668 // leading to an unnecessarily long hold time of the CodeCache_lock.
2669 ts.update(); // record starting point
2670 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2671 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2672
2673 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2674 // for the entire duration of aggregation and printing. That makes sure
2675 // we see a consistent picture and do not run into issues caused by
2676 // the CodeHeap being altered concurrently.
2677 Mutex* global_lock = allFun ? CodeCache_lock : NULL;
2678 Mutex* function_lock = allFun ? NULL : CodeCache_lock;
2679 ts_global.update(); // record starting point
2680 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag);
2681 if (global_lock != NULL) {
2682 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2683 ts_global.update(); // record starting point
2684 }
2685
2686 if (aggregate) {
2687 ts.update(); // record starting point
2688 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2689 if (function_lock != NULL) {
2690 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2691 }
2692
2693 ts.update(); // record starting point
2694 CodeCache::aggregate(out, granularity);
2695 if (function_lock != NULL) {
2696 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2697 }
2698 }
2699
2700 if (usedSpace) CodeCache::print_usedSpace(out);
2701 if (freeSpace) CodeCache::print_freeSpace(out);
2702 if (methodCount) CodeCache::print_count(out);
2703 if (methodSpace) CodeCache::print_space(out);
2704 if (methodAge) CodeCache::print_age(out);
2705 if (methodNames) {
2706 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2707 // Therefore, request the CodeCache_lock before calling...
2708 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2709 CodeCache::print_names(out);
2710 }
2711 if (discard) CodeCache::discard(out);
2712
2713 if (global_lock != NULL) {
2714 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2715 }
2716 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2717 }