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