1 /*
2 * Copyright (c) 1999, 2018, 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 "logging/log.hpp"
39 #include "logging/logStream.hpp"
40 #include "memory/allocation.inline.hpp"
41 #include "memory/resourceArea.hpp"
42 #include "oops/methodData.hpp"
43 #include "oops/method.inline.hpp"
44 #include "oops/oop.inline.hpp"
45 #include "prims/nativeLookup.hpp"
46 #include "prims/whitebox.hpp"
47 #include "runtime/arguments.hpp"
48 #include "runtime/atomic.hpp"
49 #include "runtime/compilationPolicy.hpp"
50 #include "runtime/init.hpp"
51 #include "runtime/interfaceSupport.inline.hpp"
52 #include "runtime/javaCalls.hpp"
53 #include "runtime/os.hpp"
54 #include "runtime/safepointVerifiers.hpp"
55 #include "runtime/sharedRuntime.hpp"
56 #include "runtime/sweeper.hpp"
57 #include "runtime/timerTrace.hpp"
58 #include "runtime/vframe.inline.hpp"
59 #include "trace/tracing.hpp"
60 #include "utilities/debug.hpp"
61 #include "utilities/dtrace.hpp"
62 #include "utilities/events.hpp"
63 #include "utilities/formatBuffer.hpp"
64 #ifdef COMPILER1
65 #include "c1/c1_Compiler.hpp"
66 #endif
67 #if INCLUDE_JVMCI
68 #include "jvmci/jvmciCompiler.hpp"
69 #include "jvmci/jvmciRuntime.hpp"
70 #include "jvmci/jvmciJavaClasses.hpp"
71 #include "runtime/vframe.hpp"
72 #endif
73 #ifdef COMPILER2
74 #include "opto/c2compiler.hpp"
75 #endif
76
77 #ifdef DTRACE_ENABLED
78
79 // Only bother with this argument setup if dtrace is available
80
81 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
82 { \
83 Symbol* klass_name = (method)->klass_name(); \
84 Symbol* name = (method)->name(); \
85 Symbol* signature = (method)->signature(); \
86 HOTSPOT_METHOD_COMPILE_BEGIN( \
87 (char *) comp_name, strlen(comp_name), \
88 (char *) klass_name->bytes(), klass_name->utf8_length(), \
89 (char *) name->bytes(), name->utf8_length(), \
90 (char *) signature->bytes(), signature->utf8_length()); \
91 }
92
93 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
94 { \
95 Symbol* klass_name = (method)->klass_name(); \
96 Symbol* name = (method)->name(); \
97 Symbol* signature = (method)->signature(); \
98 HOTSPOT_METHOD_COMPILE_END( \
99 (char *) comp_name, strlen(comp_name), \
100 (char *) klass_name->bytes(), klass_name->utf8_length(), \
101 (char *) name->bytes(), name->utf8_length(), \
102 (char *) signature->bytes(), signature->utf8_length(), (success)); \
103 }
104
105 #else // ndef DTRACE_ENABLED
106
107 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
108 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
109
110 #endif // ndef DTRACE_ENABLED
111
112 bool CompileBroker::_initialized = false;
113 volatile bool CompileBroker::_should_block = false;
114 volatile int CompileBroker::_print_compilation_warning = 0;
115 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
116
117 // The installed compiler(s)
118 AbstractCompiler* CompileBroker::_compilers[2];
119
120 // These counters are used to assign an unique ID to each compilation.
121 volatile jint CompileBroker::_compilation_id = 0;
122 volatile jint CompileBroker::_osr_compilation_id = 0;
123
124 // Debugging information
125 int CompileBroker::_last_compile_type = no_compile;
126 int CompileBroker::_last_compile_level = CompLevel_none;
127 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
128
129 // Performance counters
130 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
131 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
132 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
133
134 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
135 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
136 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
137 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
138 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
139
140 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
141 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
142 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
143 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
144
145 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
146 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
147 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
148 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
149 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
150 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
151 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
152
153 // Timers and counters for generating statistics
154 elapsedTimer CompileBroker::_t_total_compilation;
155 elapsedTimer CompileBroker::_t_osr_compilation;
156 elapsedTimer CompileBroker::_t_standard_compilation;
157 elapsedTimer CompileBroker::_t_invalidated_compilation;
158 elapsedTimer CompileBroker::_t_bailedout_compilation;
159
160 int CompileBroker::_total_bailout_count = 0;
161 int CompileBroker::_total_invalidated_count = 0;
162 int CompileBroker::_total_compile_count = 0;
163 int CompileBroker::_total_osr_compile_count = 0;
164 int CompileBroker::_total_standard_compile_count = 0;
165
166 int CompileBroker::_sum_osr_bytes_compiled = 0;
167 int CompileBroker::_sum_standard_bytes_compiled = 0;
168 int CompileBroker::_sum_nmethod_size = 0;
169 int CompileBroker::_sum_nmethod_code_size = 0;
170
171 long CompileBroker::_peak_compilation_time = 0;
172
173 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
174 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
175
176
177
178 class CompilationLog : public StringEventLog {
179 public:
180 CompilationLog() : StringEventLog("Compilation events") {
181 }
182
183 void log_compile(JavaThread* thread, CompileTask* task) {
184 StringLogMessage lm;
185 stringStream sstr = lm.stream();
186 // msg.time_stamp().update_to(tty->time_stamp().ticks());
187 task->print(&sstr, NULL, true, false);
188 log(thread, "%s", (const char*)lm);
189 }
190
191 void log_nmethod(JavaThread* thread, nmethod* nm) {
192 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
193 nm->compile_id(), nm->is_osr_method() ? "%" : "",
194 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
195 }
196
197 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
198 StringLogMessage lm;
199 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
200 if (retry_message != NULL) {
201 lm.append(" (%s)", retry_message);
202 }
203 lm.print("\n");
204 log(thread, "%s", (const char*)lm);
205 }
206
207 void log_metaspace_failure(const char* reason) {
208 ResourceMark rm;
209 StringLogMessage lm;
210 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
211 lm.print("\n");
212 log(JavaThread::current(), "%s", (const char*)lm);
213 }
214 };
215
216 static CompilationLog* _compilation_log = NULL;
217
218 bool compileBroker_init() {
219 if (LogEvents) {
220 _compilation_log = new CompilationLog();
221 }
222
223 // init directives stack, adding default directive
224 DirectivesStack::init();
225
226 if (DirectivesParser::has_file()) {
227 return DirectivesParser::parse_from_flag();
228 } else if (CompilerDirectivesPrint) {
229 // Print default directive even when no other was added
230 DirectivesStack::print(tty);
231 }
232
233 return true;
234 }
235
236 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
237 CompilerThread* thread = CompilerThread::current();
238 thread->set_task(task);
239 #if INCLUDE_JVMCI
240 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
241 task->set_jvmci_compiler_thread(thread);
242 }
243 #endif
244 CompileLog* log = thread->log();
245 if (log != NULL) task->log_task_start(log);
246 }
247
248 CompileTaskWrapper::~CompileTaskWrapper() {
249 CompilerThread* thread = CompilerThread::current();
250 CompileTask* task = thread->task();
251 CompileLog* log = thread->log();
252 if (log != NULL) task->log_task_done(log);
253 thread->set_task(NULL);
254 task->set_code_handle(NULL);
255 thread->set_env(NULL);
256 if (task->is_blocking()) {
257 bool free_task = false;
258 {
259 MutexLocker notifier(task->lock(), thread);
260 task->mark_complete();
261 #if INCLUDE_JVMCI
262 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
263 if (!task->has_waiter()) {
264 // The waiting thread timed out and thus did not free the task.
265 free_task = true;
266 }
267 task->set_jvmci_compiler_thread(NULL);
268 }
269 #endif
270 if (!free_task) {
271 // Notify the waiting thread that the compilation has completed
272 // so that it can free the task.
273 task->lock()->notify_all();
274 }
275 }
276 if (free_task) {
277 // The task can only be freed once the task lock is released.
278 CompileTask::free(task);
279 }
280 } else {
281 task->mark_complete();
282
283 // By convention, the compiling thread is responsible for
284 // recycling a non-blocking CompileTask.
285 CompileTask::free(task);
286 }
287 }
288
289 /**
290 * Add a CompileTask to a CompileQueue.
291 */
292 void CompileQueue::add(CompileTask* task) {
293 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
294
295 task->set_next(NULL);
296 task->set_prev(NULL);
297
298 if (_last == NULL) {
299 // The compile queue is empty.
300 assert(_first == NULL, "queue is empty");
301 _first = task;
302 _last = task;
303 } else {
304 // Append the task to the queue.
305 assert(_last->next() == NULL, "not last");
306 _last->set_next(task);
307 task->set_prev(_last);
308 _last = task;
309 }
310 ++_size;
311
312 // Mark the method as being in the compile queue.
313 task->method()->set_queued_for_compilation();
314
315 if (CIPrintCompileQueue) {
316 print_tty();
317 }
318
319 if (LogCompilation && xtty != NULL) {
320 task->log_task_queued();
321 }
322
323 // Notify CompilerThreads that a task is available.
324 MethodCompileQueue_lock->notify_all();
325 }
326
327 /**
328 * Empties compilation queue by putting all compilation tasks onto
329 * a freelist. Furthermore, the method wakes up all threads that are
330 * waiting on a compilation task to finish. This can happen if background
331 * compilation is disabled.
332 */
333 void CompileQueue::free_all() {
334 MutexLocker mu(MethodCompileQueue_lock);
335 CompileTask* next = _first;
336
337 // Iterate over all tasks in the compile queue
338 while (next != NULL) {
339 CompileTask* current = next;
340 next = current->next();
341 {
342 // Wake up thread that blocks on the compile task.
343 MutexLocker ct_lock(current->lock());
344 current->lock()->notify();
345 }
346 // Put the task back on the freelist.
347 CompileTask::free(current);
348 }
349 _first = NULL;
350
351 // Wake up all threads that block on the queue.
352 MethodCompileQueue_lock->notify_all();
353 }
354
355 /**
356 * Get the next CompileTask from a CompileQueue
357 */
358 CompileTask* CompileQueue::get() {
359 // save methods from RedefineClasses across safepoint
360 // across MethodCompileQueue_lock below.
361 methodHandle save_method;
362 methodHandle save_hot_method;
363
364 MutexLocker locker(MethodCompileQueue_lock);
365 // If _first is NULL we have no more compile jobs. There are two reasons for
366 // having no compile jobs: First, we compiled everything we wanted. Second,
367 // we ran out of code cache so compilation has been disabled. In the latter
368 // case we perform code cache sweeps to free memory such that we can re-enable
369 // compilation.
370 while (_first == NULL) {
371 // Exit loop if compilation is disabled forever
372 if (CompileBroker::is_compilation_disabled_forever()) {
373 return NULL;
374 }
375
376 // If there are no compilation tasks and we can compile new jobs
377 // (i.e., there is enough free space in the code cache) there is
378 // no need to invoke the sweeper. As a result, the hotness of methods
379 // remains unchanged. This behavior is desired, since we want to keep
380 // the stable state, i.e., we do not want to evict methods from the
381 // code cache if it is unnecessary.
382 // We need a timed wait here, since compiler threads can exit if compilation
383 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
384 // is not critical and we do not want idle compiler threads to wake up too often.
385 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
386 }
387
388 if (CompileBroker::is_compilation_disabled_forever()) {
389 return NULL;
390 }
391
392 CompileTask* task;
393 {
394 NoSafepointVerifier nsv;
395 task = CompilationPolicy::policy()->select_task(this);
396 }
397
398 if (task != NULL) {
399 // Save method pointers across unlock safepoint. The task is removed from
400 // the compilation queue, which is walked during RedefineClasses.
401 save_method = methodHandle(task->method());
402 save_hot_method = methodHandle(task->hot_method());
403
404 remove(task);
405 purge_stale_tasks(); // may temporarily release MCQ lock
406 }
407
408 return task;
409 }
410
411 // Clean & deallocate stale compile tasks.
412 // Temporarily releases MethodCompileQueue lock.
413 void CompileQueue::purge_stale_tasks() {
414 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
415 if (_first_stale != NULL) {
416 // Stale tasks are purged when MCQ lock is released,
417 // but _first_stale updates are protected by MCQ lock.
418 // Once task processing starts and MCQ lock is released,
419 // other compiler threads can reuse _first_stale.
420 CompileTask* head = _first_stale;
421 _first_stale = NULL;
422 {
423 MutexUnlocker ul(MethodCompileQueue_lock);
424 for (CompileTask* task = head; task != NULL; ) {
425 CompileTask* next_task = task->next();
426 CompileTaskWrapper ctw(task); // Frees the task
427 task->set_failure_reason("stale task");
428 task = next_task;
429 }
430 }
431 }
432 }
433
434 void CompileQueue::remove(CompileTask* task) {
435 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
436 if (task->prev() != NULL) {
437 task->prev()->set_next(task->next());
438 } else {
439 // max is the first element
440 assert(task == _first, "Sanity");
441 _first = task->next();
442 }
443
444 if (task->next() != NULL) {
445 task->next()->set_prev(task->prev());
446 } else {
447 // max is the last element
448 assert(task == _last, "Sanity");
449 _last = task->prev();
450 }
451 --_size;
452 }
453
454 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
455 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
456 remove(task);
457
458 // Enqueue the task for reclamation (should be done outside MCQ lock)
459 task->set_next(_first_stale);
460 task->set_prev(NULL);
461 _first_stale = task;
462 }
463
464 // methods in the compile queue need to be marked as used on the stack
465 // so that they don't get reclaimed by Redefine Classes
466 void CompileQueue::mark_on_stack() {
467 CompileTask* task = _first;
468 while (task != NULL) {
469 task->mark_on_stack();
470 task = task->next();
471 }
472 }
473
474
475 CompileQueue* CompileBroker::compile_queue(int comp_level) {
476 if (is_c2_compile(comp_level)) return _c2_compile_queue;
477 if (is_c1_compile(comp_level)) return _c1_compile_queue;
478 return NULL;
479 }
480
481 void CompileBroker::print_compile_queues(outputStream* st) {
482 st->print_cr("Current compiles: ");
483 MutexLocker locker(MethodCompileQueue_lock);
484
485 char buf[2000];
486 int buflen = sizeof(buf);
487 Threads::print_threads_compiling(st, buf, buflen);
488
489 st->cr();
490 if (_c1_compile_queue != NULL) {
491 _c1_compile_queue->print(st);
492 }
493 if (_c2_compile_queue != NULL) {
494 _c2_compile_queue->print(st);
495 }
496 }
497
498 void CompileQueue::print(outputStream* st) {
499 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
500 st->print_cr("%s:", name());
501 CompileTask* task = _first;
502 if (task == NULL) {
503 st->print_cr("Empty");
504 } else {
505 while (task != NULL) {
506 task->print(st, NULL, true, true);
507 task = task->next();
508 }
509 }
510 st->cr();
511 }
512
513 void CompileQueue::print_tty() {
514 ttyLocker ttyl;
515 print(tty);
516 }
517
518 CompilerCounters::CompilerCounters() {
519 _current_method[0] = '\0';
520 _compile_type = CompileBroker::no_compile;
521 }
522
523 // ------------------------------------------------------------------
524 // CompileBroker::compilation_init
525 //
526 // Initialize the Compilation object
527 void CompileBroker::compilation_init_phase1(TRAPS) {
528 _last_method_compiled[0] = '\0';
529
530 // No need to initialize compilation system if we do not use it.
531 if (!UseCompiler) {
532 return;
533 }
534 // Set the interface to the current compiler(s).
535 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
536 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
537
538 #if INCLUDE_JVMCI
539 if (EnableJVMCI) {
540 // This is creating a JVMCICompiler singleton.
541 JVMCICompiler* jvmci = new JVMCICompiler();
542
543 if (UseJVMCICompiler) {
544 _compilers[1] = jvmci;
545 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
546 if (BootstrapJVMCI) {
547 // JVMCI will bootstrap so give it more threads
548 c2_count = MIN2(32, os::active_processor_count());
549 }
550 } else {
551 c2_count = JVMCIThreads;
552 }
553 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
554 } else {
555 c1_count = JVMCIHostThreads;
556 }
557 }
558 }
559 #endif // INCLUDE_JVMCI
560
561 #ifdef COMPILER1
562 if (c1_count > 0) {
563 _compilers[0] = new Compiler();
564 }
565 #endif // COMPILER1
566
567 #ifdef COMPILER2
568 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
569 if (c2_count > 0) {
570 _compilers[1] = new C2Compiler();
571 }
572 }
573 #endif // COMPILER2
574
575 // Start the compiler thread(s) and the sweeper thread
576 init_compiler_sweeper_threads(c1_count, c2_count);
577 // totalTime performance counter is always created as it is required
578 // by the implementation of java.lang.management.CompilationMBean.
579 {
580 EXCEPTION_MARK;
581 _perf_total_compilation =
582 PerfDataManager::create_counter(JAVA_CI, "totalTime",
583 PerfData::U_Ticks, CHECK);
584 }
585
586 if (UsePerfData) {
587
588 EXCEPTION_MARK;
589
590 // create the jvmstat performance counters
591 _perf_osr_compilation =
592 PerfDataManager::create_counter(SUN_CI, "osrTime",
593 PerfData::U_Ticks, CHECK);
594
595 _perf_standard_compilation =
596 PerfDataManager::create_counter(SUN_CI, "standardTime",
597 PerfData::U_Ticks, CHECK);
598
599 _perf_total_bailout_count =
600 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
601 PerfData::U_Events, CHECK);
602
603 _perf_total_invalidated_count =
604 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
605 PerfData::U_Events, CHECK);
606
607 _perf_total_compile_count =
608 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
609 PerfData::U_Events, CHECK);
610 _perf_total_osr_compile_count =
611 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
612 PerfData::U_Events, CHECK);
613
614 _perf_total_standard_compile_count =
615 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
616 PerfData::U_Events, CHECK);
617
618 _perf_sum_osr_bytes_compiled =
619 PerfDataManager::create_counter(SUN_CI, "osrBytes",
620 PerfData::U_Bytes, CHECK);
621
622 _perf_sum_standard_bytes_compiled =
623 PerfDataManager::create_counter(SUN_CI, "standardBytes",
624 PerfData::U_Bytes, CHECK);
625
626 _perf_sum_nmethod_size =
627 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
628 PerfData::U_Bytes, CHECK);
629
630 _perf_sum_nmethod_code_size =
631 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
632 PerfData::U_Bytes, CHECK);
633
634 _perf_last_method =
635 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
636 CompilerCounters::cmname_buffer_length,
637 "", CHECK);
638
639 _perf_last_failed_method =
640 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
641 CompilerCounters::cmname_buffer_length,
642 "", CHECK);
643
644 _perf_last_invalidated_method =
645 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
646 CompilerCounters::cmname_buffer_length,
647 "", CHECK);
648
649 _perf_last_compile_type =
650 PerfDataManager::create_variable(SUN_CI, "lastType",
651 PerfData::U_None,
652 (jlong)CompileBroker::no_compile,
653 CHECK);
654
655 _perf_last_compile_size =
656 PerfDataManager::create_variable(SUN_CI, "lastSize",
657 PerfData::U_Bytes,
658 (jlong)CompileBroker::no_compile,
659 CHECK);
660
661
662 _perf_last_failed_type =
663 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
664 PerfData::U_None,
665 (jlong)CompileBroker::no_compile,
666 CHECK);
667
668 _perf_last_invalidated_type =
669 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
670 PerfData::U_None,
671 (jlong)CompileBroker::no_compile,
672 CHECK);
673 }
674 }
675
676 // Completes compiler initialization. Compilation requests submitted
677 // prior to this will be silently ignored.
678 void CompileBroker::compilation_init_phase2() {
679 _initialized = true;
680 }
681
682 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
683 AbstractCompiler* comp, bool compiler_thread, TRAPS) {
684 JavaThread* thread = NULL;
685 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0);
686 InstanceKlass* klass = InstanceKlass::cast(k);
687 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
688 Handle string = java_lang_String::create_from_str(name, CHECK_0);
689
690 // Initialize thread_oop to put it into the system threadGroup
691 Handle thread_group (THREAD, Universe::system_thread_group());
692 JavaValue result(T_VOID);
693 JavaCalls::call_special(&result, thread_oop,
694 klass,
695 vmSymbols::object_initializer_name(),
696 vmSymbols::threadgroup_string_void_signature(),
697 thread_group,
698 string,
699 CHECK_0);
700
701 {
702 MutexLocker mu(Threads_lock, THREAD);
703 if (compiler_thread) {
704 thread = new CompilerThread(queue, counters);
705 } else {
706 thread = new CodeCacheSweeperThread();
707 }
708 // At this point the new CompilerThread data-races with this startup
709 // thread (which I believe is the primoridal thread and NOT the VM
710 // thread). This means Java bytecodes being executed at startup can
711 // queue compile jobs which will run at whatever default priority the
712 // newly created CompilerThread runs at.
713
714
715 // At this point it may be possible that no osthread was created for the
716 // JavaThread due to lack of memory. We would have to throw an exception
717 // in that case. However, since this must work and we do not allow
718 // exceptions anyway, check and abort if this fails. But first release the
719 // lock.
720
721 if (thread != NULL && thread->osthread() != NULL) {
722
723 java_lang_Thread::set_thread(thread_oop(), thread);
724
725 // Note that this only sets the JavaThread _priority field, which by
726 // definition is limited to Java priorities and not OS priorities.
727 // The os-priority is set in the CompilerThread startup code itself
728
729 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
730
731 // Note that we cannot call os::set_priority because it expects Java
732 // priorities and we are *explicitly* using OS priorities so that it's
733 // possible to set the compiler thread priority higher than any Java
734 // thread.
735
736 int native_prio = CompilerThreadPriority;
737 if (native_prio == -1) {
738 if (UseCriticalCompilerThreadPriority) {
739 native_prio = os::java_to_os_priority[CriticalPriority];
740 } else {
741 native_prio = os::java_to_os_priority[NearMaxPriority];
742 }
743 }
744 os::set_native_priority(thread, native_prio);
745
746 java_lang_Thread::set_daemon(thread_oop());
747
748 thread->set_threadObj(thread_oop());
749 if (compiler_thread) {
750 thread->as_CompilerThread()->set_compiler(comp);
751 }
752 Threads::add(thread);
753 Thread::start(thread);
754 }
755 }
756
757 // First release lock before aborting VM.
758 if (thread == NULL || thread->osthread() == NULL) {
759 vm_exit_during_initialization("java.lang.OutOfMemoryError",
760 os::native_thread_creation_failed_msg());
761 }
762
763 // Let go of Threads_lock before yielding
764 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
765
766 return thread;
767 }
768
769
770 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) {
771 EXCEPTION_MARK;
772 #if !defined(ZERO)
773 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
774 #endif // !ZERO
775 // Initialize the compilation queue
776 if (c2_compiler_count > 0) {
777 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
778 _c2_compile_queue = new CompileQueue(name);
779 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
780 }
781 if (c1_compiler_count > 0) {
782 _c1_compile_queue = new CompileQueue("C1 compile queue");
783 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
784 }
785
786 int compiler_count = c1_compiler_count + c2_compiler_count;
787
788 char name_buffer[256];
789 const bool compiler_thread = true;
790 for (int i = 0; i < c2_compiler_count; i++) {
791 // Create a name for our thread.
792 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
793 CompilerCounters* counters = new CompilerCounters();
794 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK);
795 }
796
797 for (int i = c2_compiler_count; i < compiler_count; i++) {
798 // Create a name for our thread.
799 sprintf(name_buffer, "C1 CompilerThread%d", i);
800 CompilerCounters* counters = new CompilerCounters();
801 // C1
802 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK);
803 }
804
805 if (UsePerfData) {
806 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
807 }
808
809 if (MethodFlushing) {
810 // Initialize the sweeper thread
811 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK);
812 }
813 }
814
815
816 /**
817 * Set the methods on the stack as on_stack so that redefine classes doesn't
818 * reclaim them. This method is executed at a safepoint.
819 */
820 void CompileBroker::mark_on_stack() {
821 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
822 // Since we are at a safepoint, we do not need a lock to access
823 // the compile queues.
824 if (_c2_compile_queue != NULL) {
825 _c2_compile_queue->mark_on_stack();
826 }
827 if (_c1_compile_queue != NULL) {
828 _c1_compile_queue->mark_on_stack();
829 }
830 }
831
832 // ------------------------------------------------------------------
833 // CompileBroker::compile_method
834 //
835 // Request compilation of a method.
836 void CompileBroker::compile_method_base(const methodHandle& method,
837 int osr_bci,
838 int comp_level,
839 const methodHandle& hot_method,
840 int hot_count,
841 CompileTask::CompileReason compile_reason,
842 bool blocking,
843 Thread* thread) {
844 guarantee(!method->is_abstract(), "cannot compile abstract methods");
845 assert(method->method_holder()->is_instance_klass(),
846 "sanity check");
847 assert(!method->method_holder()->is_not_initialized(),
848 "method holder must be initialized");
849 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
850
851 if (CIPrintRequests) {
852 tty->print("request: ");
853 method->print_short_name(tty);
854 if (osr_bci != InvocationEntryBci) {
855 tty->print(" osr_bci: %d", osr_bci);
856 }
857 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
858 if (!hot_method.is_null()) {
859 tty->print(" hot: ");
860 if (hot_method() != method()) {
861 hot_method->print_short_name(tty);
862 } else {
863 tty->print("yes");
864 }
865 }
866 tty->cr();
867 }
868
869 // A request has been made for compilation. Before we do any
870 // real work, check to see if the method has been compiled
871 // in the meantime with a definitive result.
872 if (compilation_is_complete(method, osr_bci, comp_level)) {
873 return;
874 }
875
876 #ifndef PRODUCT
877 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
878 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
879 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
880 return;
881 }
882 }
883 #endif
884
885 // If this method is already in the compile queue, then
886 // we do not block the current thread.
887 if (compilation_is_in_queue(method)) {
888 // We may want to decay our counter a bit here to prevent
889 // multiple denied requests for compilation. This is an
890 // open compilation policy issue. Note: The other possibility,
891 // in the case that this is a blocking compile request, is to have
892 // all subsequent blocking requesters wait for completion of
893 // ongoing compiles. Note that in this case we'll need a protocol
894 // for freeing the associated compile tasks. [Or we could have
895 // a single static monitor on which all these waiters sleep.]
896 return;
897 }
898
899 if (TieredCompilation) {
900 // Tiered policy requires MethodCounters to exist before adding a method to
901 // the queue. Create if we don't have them yet.
902 method->get_method_counters(thread);
903 }
904
905 // Outputs from the following MutexLocker block:
906 CompileTask* task = NULL;
907 CompileQueue* queue = compile_queue(comp_level);
908
909 // Acquire our lock.
910 {
911 MutexLocker locker(MethodCompileQueue_lock, thread);
912
913 // Make sure the method has not slipped into the queues since
914 // last we checked; note that those checks were "fast bail-outs".
915 // Here we need to be more careful, see 14012000 below.
916 if (compilation_is_in_queue(method)) {
917 return;
918 }
919
920 // We need to check again to see if the compilation has
921 // completed. A previous compilation may have registered
922 // some result.
923 if (compilation_is_complete(method, osr_bci, comp_level)) {
924 return;
925 }
926
927 // We now know that this compilation is not pending, complete,
928 // or prohibited. Assign a compile_id to this compilation
929 // and check to see if it is in our [Start..Stop) range.
930 int compile_id = assign_compile_id(method, osr_bci);
931 if (compile_id == 0) {
932 // The compilation falls outside the allowed range.
933 return;
934 }
935
936 #if INCLUDE_JVMCI
937 if (UseJVMCICompiler) {
938 if (blocking) {
939 // Don't allow blocking compiles for requests triggered by JVMCI.
940 if (thread->is_Compiler_thread()) {
941 blocking = false;
942 }
943
944 // Don't allow blocking compiles if inside a class initializer or while performing class loading
945 vframeStream vfst((JavaThread*) thread);
946 for (; !vfst.at_end(); vfst.next()) {
947 if (vfst.method()->is_static_initializer() ||
948 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
949 vfst.method()->name() == vmSymbols::loadClass_name())) {
950 blocking = false;
951 break;
952 }
953 }
954
955 // Don't allow blocking compilation requests to JVMCI
956 // if JVMCI itself is not yet initialized
957 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) {
958 blocking = false;
959 }
960
961 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
962 // to avoid deadlock between compiler thread(s) and threads run at shutdown
963 // such as the DestroyJavaVM thread.
964 if (JVMCIRuntime::shutdown_called()) {
965 blocking = false;
966 }
967 }
968 }
969 #endif // INCLUDE_JVMCI
970
971 // We will enter the compilation in the queue.
972 // 14012000: Note that this sets the queued_for_compile bits in
973 // the target method. We can now reason that a method cannot be
974 // queued for compilation more than once, as follows:
975 // Before a thread queues a task for compilation, it first acquires
976 // the compile queue lock, then checks if the method's queued bits
977 // are set or it has already been compiled. Thus there can not be two
978 // instances of a compilation task for the same method on the
979 // compilation queue. Consider now the case where the compilation
980 // thread has already removed a task for that method from the queue
981 // and is in the midst of compiling it. In this case, the
982 // queued_for_compile bits must be set in the method (and these
983 // will be visible to the current thread, since the bits were set
984 // under protection of the compile queue lock, which we hold now.
985 // When the compilation completes, the compiler thread first sets
986 // the compilation result and then clears the queued_for_compile
987 // bits. Neither of these actions are protected by a barrier (or done
988 // under the protection of a lock), so the only guarantee we have
989 // (on machines with TSO (Total Store Order)) is that these values
990 // will update in that order. As a result, the only combinations of
991 // these bits that the current thread will see are, in temporal order:
992 // <RESULT, QUEUE> :
993 // <0, 1> : in compile queue, but not yet compiled
994 // <1, 1> : compiled but queue bit not cleared
995 // <1, 0> : compiled and queue bit cleared
996 // Because we first check the queue bits then check the result bits,
997 // we are assured that we cannot introduce a duplicate task.
998 // Note that if we did the tests in the reverse order (i.e. check
999 // result then check queued bit), we could get the result bit before
1000 // the compilation completed, and the queue bit after the compilation
1001 // completed, and end up introducing a "duplicate" (redundant) task.
1002 // In that case, the compiler thread should first check if a method
1003 // has already been compiled before trying to compile it.
1004 // NOTE: in the event that there are multiple compiler threads and
1005 // there is de-optimization/recompilation, things will get hairy,
1006 // and in that case it's best to protect both the testing (here) of
1007 // these bits, and their updating (here and elsewhere) under a
1008 // common lock.
1009 task = create_compile_task(queue,
1010 compile_id, method,
1011 osr_bci, comp_level,
1012 hot_method, hot_count, compile_reason,
1013 blocking);
1014 }
1015
1016 if (blocking) {
1017 wait_for_completion(task);
1018 }
1019 }
1020
1021 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1022 int comp_level,
1023 const methodHandle& hot_method, int hot_count,
1024 CompileTask::CompileReason compile_reason,
1025 Thread* THREAD) {
1026 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1027 if (!_initialized || comp_level == CompLevel_none) {
1028 return NULL;
1029 }
1030
1031 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1032 assert(comp != NULL, "Ensure we have a compiler");
1033
1034 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1035 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1036 DirectivesStack::release(directive);
1037 return nm;
1038 }
1039
1040 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1041 int comp_level,
1042 const methodHandle& hot_method, int hot_count,
1043 CompileTask::CompileReason compile_reason,
1044 DirectiveSet* directive,
1045 Thread* THREAD) {
1046
1047 // make sure arguments make sense
1048 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1049 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1050 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1051 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1052 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1053 // allow any levels for WhiteBox
1054 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1055 // return quickly if possible
1056
1057 // lock, make sure that the compilation
1058 // isn't prohibited in a straightforward way.
1059 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1060 if (comp == NULL || !comp->can_compile_method(method) ||
1061 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1062 return NULL;
1063 }
1064
1065 #if INCLUDE_JVMCI
1066 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) {
1067 return NULL;
1068 }
1069 #endif
1070
1071 if (osr_bci == InvocationEntryBci) {
1072 // standard compilation
1073 CompiledMethod* method_code = method->code();
1074 if (method_code != NULL && method_code->is_nmethod()) {
1075 if (compilation_is_complete(method, osr_bci, comp_level)) {
1076 return (nmethod*) method_code;
1077 }
1078 }
1079 if (method->is_not_compilable(comp_level)) {
1080 return NULL;
1081 }
1082 } else {
1083 // osr compilation
1084 #ifndef TIERED
1085 // seems like an assert of dubious value
1086 assert(comp_level == CompLevel_highest_tier,
1087 "all OSR compiles are assumed to be at a single compilation level");
1088 #endif // TIERED
1089 // We accept a higher level osr method
1090 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1091 if (nm != NULL) return nm;
1092 if (method->is_not_osr_compilable(comp_level)) return NULL;
1093 }
1094
1095 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1096 // some prerequisites that are compiler specific
1097 if (comp->is_c2()) {
1098 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1099 // Resolve all classes seen in the signature of the method
1100 // we are compiling.
1101 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1102 }
1103
1104 // If the method is native, do the lookup in the thread requesting
1105 // the compilation. Native lookups can load code, which is not
1106 // permitted during compilation.
1107 //
1108 // Note: A native method implies non-osr compilation which is
1109 // checked with an assertion at the entry of this method.
1110 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1111 bool in_base_library;
1112 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1113 if (HAS_PENDING_EXCEPTION) {
1114 // In case of an exception looking up the method, we just forget
1115 // about it. The interpreter will kick-in and throw the exception.
1116 method->set_not_compilable(); // implies is_not_osr_compilable()
1117 CLEAR_PENDING_EXCEPTION;
1118 return NULL;
1119 }
1120 assert(method->has_native_function(), "must have native code by now");
1121 }
1122
1123 // RedefineClasses() has replaced this method; just return
1124 if (method->is_old()) {
1125 return NULL;
1126 }
1127
1128 // JVMTI -- post_compile_event requires jmethod_id() that may require
1129 // a lock the compiling thread can not acquire. Prefetch it here.
1130 if (JvmtiExport::should_post_compiled_method_load()) {
1131 method->jmethod_id();
1132 }
1133
1134 // do the compilation
1135 if (method->is_native()) {
1136 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1137 // The following native methods:
1138 //
1139 // java.lang.Float.intBitsToFloat
1140 // java.lang.Float.floatToRawIntBits
1141 // java.lang.Double.longBitsToDouble
1142 // java.lang.Double.doubleToRawLongBits
1143 //
1144 // are called through the interpreter even if interpreter native stubs
1145 // are not preferred (i.e., calling through adapter handlers is preferred).
1146 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1147 // if the version of the methods from the native libraries is called.
1148 // As the interpreter and the C2-intrinsified version of the methods preserves
1149 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1150 if ((UseSSE >= 1 &&
1151 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1152 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1153 (UseSSE >= 2 &&
1154 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1155 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1156 return NULL;
1157 }
1158
1159 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1160 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1161 //
1162 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1163 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1164 AdapterHandlerLibrary::create_native_wrapper(method);
1165 } else {
1166 return NULL;
1167 }
1168 } else {
1169 // If the compiler is shut off due to code cache getting full
1170 // fail out now so blocking compiles dont hang the java thread
1171 if (!should_compile_new_jobs()) {
1172 CompilationPolicy::policy()->delay_compilation(method());
1173 return NULL;
1174 }
1175 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles;
1176 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1177 }
1178
1179 // return requested nmethod
1180 // We accept a higher level osr method
1181 if (osr_bci == InvocationEntryBci) {
1182 CompiledMethod* code = method->code();
1183 if (code == NULL) {
1184 return (nmethod*) code;
1185 } else {
1186 return code->as_nmethod_or_null();
1187 }
1188 }
1189 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1190 }
1191
1192
1193 // ------------------------------------------------------------------
1194 // CompileBroker::compilation_is_complete
1195 //
1196 // See if compilation of this method is already complete.
1197 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1198 int osr_bci,
1199 int comp_level) {
1200 bool is_osr = (osr_bci != standard_entry_bci);
1201 if (is_osr) {
1202 if (method->is_not_osr_compilable(comp_level)) {
1203 return true;
1204 } else {
1205 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1206 return (result != NULL);
1207 }
1208 } else {
1209 if (method->is_not_compilable(comp_level)) {
1210 return true;
1211 } else {
1212 CompiledMethod* result = method->code();
1213 if (result == NULL) return false;
1214 return comp_level == result->comp_level();
1215 }
1216 }
1217 }
1218
1219
1220 /**
1221 * See if this compilation is already requested.
1222 *
1223 * Implementation note: there is only a single "is in queue" bit
1224 * for each method. This means that the check below is overly
1225 * conservative in the sense that an osr compilation in the queue
1226 * will block a normal compilation from entering the queue (and vice
1227 * versa). This can be remedied by a full queue search to disambiguate
1228 * cases. If it is deemed profitable, this may be done.
1229 */
1230 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1231 return method->queued_for_compilation();
1232 }
1233
1234 // ------------------------------------------------------------------
1235 // CompileBroker::compilation_is_prohibited
1236 //
1237 // See if this compilation is not allowed.
1238 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1239 bool is_native = method->is_native();
1240 // Some compilers may not support the compilation of natives.
1241 AbstractCompiler *comp = compiler(comp_level);
1242 if (is_native &&
1243 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1244 method->set_not_compilable_quietly(comp_level);
1245 return true;
1246 }
1247
1248 bool is_osr = (osr_bci != standard_entry_bci);
1249 // Some compilers may not support on stack replacement.
1250 if (is_osr &&
1251 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1252 method->set_not_osr_compilable(comp_level);
1253 return true;
1254 }
1255
1256 // The method may be explicitly excluded by the user.
1257 double scale;
1258 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1259 bool quietly = CompilerOracle::should_exclude_quietly();
1260 if (PrintCompilation && !quietly) {
1261 // This does not happen quietly...
1262 ResourceMark rm;
1263 tty->print("### Excluding %s:%s",
1264 method->is_native() ? "generation of native wrapper" : "compile",
1265 (method->is_static() ? " static" : ""));
1266 method->print_short_name(tty);
1267 tty->cr();
1268 }
1269 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand");
1270 }
1271
1272 return false;
1273 }
1274
1275 /**
1276 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1277 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1278 * The function also allows to generate separate compilation IDs for OSR compilations.
1279 */
1280 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1281 #ifdef ASSERT
1282 bool is_osr = (osr_bci != standard_entry_bci);
1283 int id;
1284 if (method->is_native()) {
1285 assert(!is_osr, "can't be osr");
1286 // Adapters, native wrappers and method handle intrinsics
1287 // should be generated always.
1288 return Atomic::add(1, &_compilation_id);
1289 } else if (CICountOSR && is_osr) {
1290 id = Atomic::add(1, &_osr_compilation_id);
1291 if (CIStartOSR <= id && id < CIStopOSR) {
1292 return id;
1293 }
1294 } else {
1295 id = Atomic::add(1, &_compilation_id);
1296 if (CIStart <= id && id < CIStop) {
1297 return id;
1298 }
1299 }
1300
1301 // Method was not in the appropriate compilation range.
1302 method->set_not_compilable_quietly();
1303 return 0;
1304 #else
1305 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1306 // only _compilation_id is incremented.
1307 return Atomic::add(1, &_compilation_id);
1308 #endif
1309 }
1310
1311 // ------------------------------------------------------------------
1312 // CompileBroker::assign_compile_id_unlocked
1313 //
1314 // Public wrapper for assign_compile_id that acquires the needed locks
1315 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1316 MutexLocker locker(MethodCompileQueue_lock, thread);
1317 return assign_compile_id(method, osr_bci);
1318 }
1319
1320 // ------------------------------------------------------------------
1321 // CompileBroker::preload_classes
1322 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) {
1323 // Move this code over from c1_Compiler.cpp
1324 ShouldNotReachHere();
1325 }
1326
1327
1328 // ------------------------------------------------------------------
1329 // CompileBroker::create_compile_task
1330 //
1331 // Create a CompileTask object representing the current request for
1332 // compilation. Add this task to the queue.
1333 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1334 int compile_id,
1335 const methodHandle& method,
1336 int osr_bci,
1337 int comp_level,
1338 const methodHandle& hot_method,
1339 int hot_count,
1340 CompileTask::CompileReason compile_reason,
1341 bool blocking) {
1342 CompileTask* new_task = CompileTask::allocate();
1343 new_task->initialize(compile_id, method, osr_bci, comp_level,
1344 hot_method, hot_count, compile_reason,
1345 blocking);
1346 queue->add(new_task);
1347 return new_task;
1348 }
1349
1350 #if INCLUDE_JVMCI
1351 // The number of milliseconds to wait before checking if
1352 // JVMCI compilation has made progress.
1353 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1354
1355 // The number of JVMCI compilation progress checks that must fail
1356 // before unblocking a thread waiting for a blocking compilation.
1357 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1358
1359 /**
1360 * Waits for a JVMCI compiler to complete a given task. This thread
1361 * waits until either the task completes or it sees no JVMCI compilation
1362 * progress for N consecutive milliseconds where N is
1363 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1364 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1365 *
1366 * @return true if this thread needs to free/recycle the task
1367 */
1368 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1369 MutexLocker waiter(task->lock(), thread);
1370 int progress_wait_attempts = 0;
1371 int methods_compiled = jvmci->methods_compiled();
1372 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1373 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1374 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1375
1376 bool progress;
1377 if (jvmci_compiler_thread != NULL) {
1378 // If the JVMCI compiler thread is not blocked, we deem it to be making progress.
1379 progress = jvmci_compiler_thread->thread_state() != _thread_blocked;
1380 } else {
1381 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1382 // that all JVMCI compiler threads are blocked on. We use the counter for
1383 // successful JVMCI compilations to determine whether JVMCI compilation
1384 // is still making progress through the JVMCI compiler queue.
1385 progress = jvmci->methods_compiled() != methods_compiled;
1386 }
1387
1388 if (!progress) {
1389 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1390 if (PrintCompilation) {
1391 task->print(tty, "wait for blocking compilation timed out");
1392 }
1393 break;
1394 }
1395 } else {
1396 progress_wait_attempts = 0;
1397 if (jvmci_compiler_thread == NULL) {
1398 methods_compiled = jvmci->methods_compiled();
1399 }
1400 }
1401 }
1402 task->clear_waiter();
1403 return task->is_complete();
1404 }
1405 #endif
1406
1407 /**
1408 * Wait for the compilation task to complete.
1409 */
1410 void CompileBroker::wait_for_completion(CompileTask* task) {
1411 if (CIPrintCompileQueue) {
1412 ttyLocker ttyl;
1413 tty->print_cr("BLOCKING FOR COMPILE");
1414 }
1415
1416 assert(task->is_blocking(), "can only wait on blocking task");
1417
1418 JavaThread* thread = JavaThread::current();
1419 thread->set_blocked_on_compilation(true);
1420
1421 methodHandle method(thread, task->method());
1422 bool free_task;
1423 #if INCLUDE_JVMCI
1424 AbstractCompiler* comp = compiler(task->comp_level());
1425 if (comp->is_jvmci()) {
1426 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1427 } else
1428 #endif
1429 {
1430 MutexLocker waiter(task->lock(), thread);
1431 free_task = true;
1432 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1433 task->lock()->wait();
1434 }
1435 }
1436
1437 thread->set_blocked_on_compilation(false);
1438 if (free_task) {
1439 if (is_compilation_disabled_forever()) {
1440 CompileTask::free(task);
1441 return;
1442 }
1443
1444 // It is harmless to check this status without the lock, because
1445 // completion is a stable property (until the task object is recycled).
1446 assert(task->is_complete(), "Compilation should have completed");
1447 assert(task->code_handle() == NULL, "must be reset");
1448
1449 // By convention, the waiter is responsible for recycling a
1450 // blocking CompileTask. Since there is only one waiter ever
1451 // waiting on a CompileTask, we know that no one else will
1452 // be using this CompileTask; we can free it.
1453 CompileTask::free(task);
1454 }
1455 }
1456
1457 /**
1458 * Initialize compiler thread(s) + compiler object(s). The postcondition
1459 * of this function is that the compiler runtimes are initialized and that
1460 * compiler threads can start compiling.
1461 */
1462 bool CompileBroker::init_compiler_runtime() {
1463 CompilerThread* thread = CompilerThread::current();
1464 AbstractCompiler* comp = thread->compiler();
1465 // Final sanity check - the compiler object must exist
1466 guarantee(comp != NULL, "Compiler object must exist");
1467
1468 int system_dictionary_modification_counter;
1469 {
1470 MutexLocker locker(Compile_lock, thread);
1471 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1472 }
1473
1474 {
1475 // Must switch to native to allocate ci_env
1476 ThreadToNativeFromVM ttn(thread);
1477 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1478 // Cache Jvmti state
1479 ci_env.cache_jvmti_state();
1480 // Cache DTrace flags
1481 ci_env.cache_dtrace_flags();
1482
1483 // Switch back to VM state to do compiler initialization
1484 ThreadInVMfromNative tv(thread);
1485 ResetNoHandleMark rnhm;
1486
1487 // Perform per-thread and global initializations
1488 comp->initialize();
1489 }
1490
1491 if (comp->is_failed()) {
1492 disable_compilation_forever();
1493 // If compiler initialization failed, no compiler thread that is specific to a
1494 // particular compiler runtime will ever start to compile methods.
1495 shutdown_compiler_runtime(comp, thread);
1496 return false;
1497 }
1498
1499 // C1 specific check
1500 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1501 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1502 return false;
1503 }
1504
1505 return true;
1506 }
1507
1508 /**
1509 * If C1 and/or C2 initialization failed, we shut down all compilation.
1510 * We do this to keep things simple. This can be changed if it ever turns
1511 * out to be a problem.
1512 */
1513 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1514 // Free buffer blob, if allocated
1515 if (thread->get_buffer_blob() != NULL) {
1516 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1517 CodeCache::free(thread->get_buffer_blob());
1518 }
1519
1520 if (comp->should_perform_shutdown()) {
1521 // There are two reasons for shutting down the compiler
1522 // 1) compiler runtime initialization failed
1523 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1524 warning("%s initialization failed. Shutting down all compilers", comp->name());
1525
1526 // Only one thread per compiler runtime object enters here
1527 // Set state to shut down
1528 comp->set_shut_down();
1529
1530 // Delete all queued compilation tasks to make compiler threads exit faster.
1531 if (_c1_compile_queue != NULL) {
1532 _c1_compile_queue->free_all();
1533 }
1534
1535 if (_c2_compile_queue != NULL) {
1536 _c2_compile_queue->free_all();
1537 }
1538
1539 // Set flags so that we continue execution with using interpreter only.
1540 UseCompiler = false;
1541 UseInterpreter = true;
1542
1543 // We could delete compiler runtimes also. However, there are references to
1544 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1545 // fail. This can be done later if necessary.
1546 }
1547 }
1548
1549 // ------------------------------------------------------------------
1550 // CompileBroker::compiler_thread_loop
1551 //
1552 // The main loop run by a CompilerThread.
1553 void CompileBroker::compiler_thread_loop() {
1554 CompilerThread* thread = CompilerThread::current();
1555 CompileQueue* queue = thread->queue();
1556 // For the thread that initializes the ciObjectFactory
1557 // this resource mark holds all the shared objects
1558 ResourceMark rm;
1559
1560 // First thread to get here will initialize the compiler interface
1561
1562 {
1563 ASSERT_IN_VM;
1564 MutexLocker only_one (CompileThread_lock, thread);
1565 if (!ciObjectFactory::is_initialized()) {
1566 ciObjectFactory::initialize();
1567 }
1568 }
1569
1570 // Open a log.
1571 if (LogCompilation) {
1572 init_compiler_thread_log();
1573 }
1574 CompileLog* log = thread->log();
1575 if (log != NULL) {
1576 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1577 thread->name(),
1578 os::current_thread_id(),
1579 os::current_process_id());
1580 log->stamp();
1581 log->end_elem();
1582 }
1583
1584 // If compiler thread/runtime initialization fails, exit the compiler thread
1585 if (!init_compiler_runtime()) {
1586 return;
1587 }
1588
1589 // Poll for new compilation tasks as long as the JVM runs. Compilation
1590 // should only be disabled if something went wrong while initializing the
1591 // compiler runtimes. This, in turn, should not happen. The only known case
1592 // when compiler runtime initialization fails is if there is not enough free
1593 // space in the code cache to generate the necessary stubs, etc.
1594 while (!is_compilation_disabled_forever()) {
1595 // We need this HandleMark to avoid leaking VM handles.
1596 HandleMark hm(thread);
1597
1598 CompileTask* task = queue->get();
1599 if (task == NULL) {
1600 continue;
1601 }
1602
1603 // Give compiler threads an extra quanta. They tend to be bursty and
1604 // this helps the compiler to finish up the job.
1605 if (CompilerThreadHintNoPreempt) {
1606 os::hint_no_preempt();
1607 }
1608
1609 // Assign the task to the current thread. Mark this compilation
1610 // thread as active for the profiler.
1611 CompileTaskWrapper ctw(task);
1612 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1613 task->set_code_handle(&result_handle);
1614 methodHandle method(thread, task->method());
1615
1616 // Never compile a method if breakpoints are present in it
1617 if (method()->number_of_breakpoints() == 0) {
1618 // Compile the method.
1619 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1620 invoke_compiler_on_method(task);
1621 } else {
1622 // After compilation is disabled, remove remaining methods from queue
1623 method->clear_queued_for_compilation();
1624 task->set_failure_reason("compilation is disabled");
1625 }
1626 }
1627 }
1628
1629 // Shut down compiler runtime
1630 shutdown_compiler_runtime(thread->compiler(), thread);
1631 }
1632
1633 // ------------------------------------------------------------------
1634 // CompileBroker::init_compiler_thread_log
1635 //
1636 // Set up state required by +LogCompilation.
1637 void CompileBroker::init_compiler_thread_log() {
1638 CompilerThread* thread = CompilerThread::current();
1639 char file_name[4*K];
1640 FILE* fp = NULL;
1641 intx thread_id = os::current_thread_id();
1642 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1643 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1644 if (dir == NULL) {
1645 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1646 thread_id, os::current_process_id());
1647 } else {
1648 jio_snprintf(file_name, sizeof(file_name),
1649 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1650 os::file_separator(), thread_id, os::current_process_id());
1651 }
1652
1653 fp = fopen(file_name, "wt");
1654 if (fp != NULL) {
1655 if (LogCompilation && Verbose) {
1656 tty->print_cr("Opening compilation log %s", file_name);
1657 }
1658 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1659 if (log == NULL) {
1660 fclose(fp);
1661 return;
1662 }
1663 thread->init_log(log);
1664
1665 if (xtty != NULL) {
1666 ttyLocker ttyl;
1667 // Record any per thread log files
1668 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1669 }
1670 return;
1671 }
1672 }
1673 warning("Cannot open log file: %s", file_name);
1674 }
1675
1676 void CompileBroker::log_metaspace_failure() {
1677 const char* message = "some methods may not be compiled because metaspace "
1678 "is out of memory";
1679 if (_compilation_log != NULL) {
1680 _compilation_log->log_metaspace_failure(message);
1681 }
1682 if (PrintCompilation) {
1683 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1684 }
1685 }
1686
1687
1688 // ------------------------------------------------------------------
1689 // CompileBroker::set_should_block
1690 //
1691 // Set _should_block.
1692 // Call this from the VM, with Threads_lock held and a safepoint requested.
1693 void CompileBroker::set_should_block() {
1694 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1695 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1696 #ifndef PRODUCT
1697 if (PrintCompilation && (Verbose || WizardMode))
1698 tty->print_cr("notifying compiler thread pool to block");
1699 #endif
1700 _should_block = true;
1701 }
1702
1703 // ------------------------------------------------------------------
1704 // CompileBroker::maybe_block
1705 //
1706 // Call this from the compiler at convenient points, to poll for _should_block.
1707 void CompileBroker::maybe_block() {
1708 if (_should_block) {
1709 #ifndef PRODUCT
1710 if (PrintCompilation && (Verbose || WizardMode))
1711 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1712 #endif
1713 ThreadInVMfromNative tivfn(JavaThread::current());
1714 }
1715 }
1716
1717 // wrapper for CodeCache::print_summary()
1718 static void codecache_print(bool detailed)
1719 {
1720 ResourceMark rm;
1721 stringStream s;
1722 // Dump code cache into a buffer before locking the tty,
1723 {
1724 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1725 CodeCache::print_summary(&s, detailed);
1726 }
1727 ttyLocker ttyl;
1728 tty->print("%s", s.as_string());
1729 }
1730
1731 // wrapper for CodeCache::print_summary() using outputStream
1732 static void codecache_print(outputStream* out, bool detailed) {
1733 ResourceMark rm;
1734 stringStream s;
1735
1736 // Dump code cache into a buffer
1737 {
1738 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1739 CodeCache::print_summary(&s, detailed);
1740 }
1741
1742 char* remaining_log = s.as_string();
1743 while (*remaining_log != '\0') {
1744 char* eol = strchr(remaining_log, '\n');
1745 if (eol == NULL) {
1746 out->print_cr("%s", remaining_log);
1747 remaining_log = remaining_log + strlen(remaining_log);
1748 } else {
1749 *eol = '\0';
1750 out->print_cr("%s", remaining_log);
1751 remaining_log = eol + 1;
1752 }
1753 }
1754 }
1755
1756 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) {
1757
1758 if (success) {
1759 task->mark_success();
1760 if (ci_env != NULL) {
1761 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
1762 }
1763 if (_compilation_log != NULL) {
1764 nmethod* code = task->code();
1765 if (code != NULL) {
1766 _compilation_log->log_nmethod(thread, code);
1767 }
1768 }
1769 }
1770
1771 // simulate crash during compilation
1772 assert(task->compile_id() != CICrashAt, "just as planned");
1773 if (event.should_commit()) {
1774 event.set_method(task->method());
1775 event.set_compileId(task->compile_id());
1776 event.set_compileLevel(task->comp_level());
1777 event.set_succeded(task->is_success());
1778 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci);
1779 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1780 event.set_inlinedBytes(task->num_inlined_bytecodes());
1781 event.commit();
1782 }
1783 }
1784
1785 int DirectivesStack::_depth = 0;
1786 CompilerDirectives* DirectivesStack::_top = NULL;
1787 CompilerDirectives* DirectivesStack::_bottom = NULL;
1788
1789 // ------------------------------------------------------------------
1790 // CompileBroker::invoke_compiler_on_method
1791 //
1792 // Compile a method.
1793 //
1794 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1795 task->print_ul();
1796 if (PrintCompilation) {
1797 ResourceMark rm;
1798 task->print_tty();
1799 }
1800 elapsedTimer time;
1801
1802 CompilerThread* thread = CompilerThread::current();
1803 ResourceMark rm(thread);
1804
1805 if (LogEvents) {
1806 _compilation_log->log_compile(thread, task);
1807 }
1808
1809 // Common flags.
1810 uint compile_id = task->compile_id();
1811 int osr_bci = task->osr_bci();
1812 bool is_osr = (osr_bci != standard_entry_bci);
1813 bool should_log = (thread->log() != NULL);
1814 bool should_break = false;
1815 const int task_level = task->comp_level();
1816 AbstractCompiler* comp = task->compiler();
1817
1818 DirectiveSet* directive;
1819 {
1820 // create the handle inside it's own block so it can't
1821 // accidentally be referenced once the thread transitions to
1822 // native. The NoHandleMark before the transition should catch
1823 // any cases where this occurs in the future.
1824 methodHandle method(thread, task->method());
1825 assert(!method->is_native(), "no longer compile natives");
1826
1827 // Look up matching directives
1828 directive = DirectivesStack::getMatchingDirective(method, comp);
1829
1830 // Save information about this method in case of failure.
1831 set_last_compile(thread, method, is_osr, task_level);
1832
1833 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1834 }
1835
1836 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
1837 if (should_log && !directive->LogOption) {
1838 should_log = false;
1839 }
1840
1841 // Allocate a new set of JNI handles.
1842 push_jni_handle_block();
1843 Method* target_handle = task->method();
1844 int compilable = ciEnv::MethodCompilable;
1845 const char* failure_reason = NULL;
1846 const char* retry_message = NULL;
1847
1848 int system_dictionary_modification_counter;
1849 {
1850 MutexLocker locker(Compile_lock, thread);
1851 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1852 }
1853
1854 #if INCLUDE_JVMCI
1855 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
1856 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
1857
1858 TraceTime t1("compilation", &time);
1859 EventCompilation event;
1860
1861 // Skip redefined methods
1862 if (target_handle->is_old()) {
1863 failure_reason = "redefined method";
1864 retry_message = "not retryable";
1865 compilable = ciEnv::MethodCompilable_never;
1866 } else {
1867 JVMCIEnv env(task, system_dictionary_modification_counter);
1868 methodHandle method(thread, target_handle);
1869 jvmci->compile_method(method, osr_bci, &env);
1870
1871 failure_reason = env.failure_reason();
1872 if (!env.retryable()) {
1873 retry_message = "not retryable";
1874 compilable = ciEnv::MethodCompilable_not_at_tier;
1875 }
1876 }
1877 post_compile(thread, task, event, task->code() != NULL, NULL);
1878
1879 } else
1880 #endif // INCLUDE_JVMCI
1881 {
1882 NoHandleMark nhm;
1883 ThreadToNativeFromVM ttn(thread);
1884
1885 ciEnv ci_env(task, system_dictionary_modification_counter);
1886 if (should_break) {
1887 ci_env.set_break_at_compile(true);
1888 }
1889 if (should_log) {
1890 ci_env.set_log(thread->log());
1891 }
1892 assert(thread->env() == &ci_env, "set by ci_env");
1893 // The thread-env() field is cleared in ~CompileTaskWrapper.
1894
1895 // Cache Jvmti state
1896 ci_env.cache_jvmti_state();
1897
1898 // Cache DTrace flags
1899 ci_env.cache_dtrace_flags();
1900
1901 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1902
1903 TraceTime t1("compilation", &time);
1904 EventCompilation event;
1905
1906 if (comp == NULL) {
1907 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1908 } else {
1909 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
1910 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
1911 while (WhiteBox::compilation_locked) {
1912 locker.wait(Mutex::_no_safepoint_check_flag);
1913 }
1914 }
1915 comp->compile_method(&ci_env, target, osr_bci, directive);
1916 }
1917
1918 if (!ci_env.failing() && task->code() == NULL) {
1919 //assert(false, "compiler should always document failure");
1920 // The compiler elected, without comment, not to register a result.
1921 // Do not attempt further compilations of this method.
1922 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1923 }
1924
1925 // Copy this bit to the enclosing block:
1926 compilable = ci_env.compilable();
1927
1928 if (ci_env.failing()) {
1929 failure_reason = ci_env.failure_reason();
1930 retry_message = ci_env.retry_message();
1931 ci_env.report_failure(failure_reason);
1932 }
1933
1934 post_compile(thread, task, event, !ci_env.failing(), &ci_env);
1935 }
1936 // Remove the JNI handle block after the ciEnv destructor has run in
1937 // the previous block.
1938 pop_jni_handle_block();
1939
1940 if (failure_reason != NULL) {
1941 task->set_failure_reason(failure_reason);
1942 if (_compilation_log != NULL) {
1943 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
1944 }
1945 if (PrintCompilation) {
1946 FormatBufferResource msg = retry_message != NULL ?
1947 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
1948 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
1949 task->print(tty, msg);
1950 }
1951 }
1952
1953 methodHandle method(thread, task->method());
1954
1955 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1956
1957 collect_statistics(thread, time, task);
1958
1959 nmethod* nm = task->code();
1960 if (nm != NULL) {
1961 nm->maybe_print_nmethod(directive);
1962 }
1963 DirectivesStack::release(directive);
1964
1965 if (PrintCompilation && PrintCompilation2) {
1966 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1967 tty->print("%4d ", compile_id); // print compilation number
1968 tty->print("%s ", (is_osr ? "%" : " "));
1969 if (task->code() != NULL) {
1970 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1971 }
1972 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1973 }
1974
1975 Log(compilation, codecache) log;
1976 if (log.is_debug()) {
1977 LogStream ls(log.debug());
1978 codecache_print(&ls, /* detailed= */ false);
1979 }
1980 if (PrintCodeCacheOnCompilation) {
1981 codecache_print(/* detailed= */ false);
1982 }
1983 // Disable compilation, if required.
1984 switch (compilable) {
1985 case ciEnv::MethodCompilable_never:
1986 if (is_osr)
1987 method->set_not_osr_compilable_quietly();
1988 else
1989 method->set_not_compilable_quietly();
1990 break;
1991 case ciEnv::MethodCompilable_not_at_tier:
1992 if (is_osr)
1993 method->set_not_osr_compilable_quietly(task_level);
1994 else
1995 method->set_not_compilable_quietly(task_level);
1996 break;
1997 }
1998
1999 // Note that the queued_for_compilation bits are cleared without
2000 // protection of a mutex. [They were set by the requester thread,
2001 // when adding the task to the compile queue -- at which time the
2002 // compile queue lock was held. Subsequently, we acquired the compile
2003 // queue lock to get this task off the compile queue; thus (to belabour
2004 // the point somewhat) our clearing of the bits must be occurring
2005 // only after the setting of the bits. See also 14012000 above.
2006 method->clear_queued_for_compilation();
2007
2008 #ifdef ASSERT
2009 if (CollectedHeap::fired_fake_oom()) {
2010 // The current compile received a fake OOM during compilation so
2011 // go ahead and exit the VM since the test apparently succeeded
2012 tty->print_cr("*** Shutting down VM after successful fake OOM");
2013 vm_exit(0);
2014 }
2015 #endif
2016 }
2017
2018 /**
2019 * The CodeCache is full. Print warning and disable compilation.
2020 * Schedule code cache cleaning so compilation can continue later.
2021 * This function needs to be called only from CodeCache::allocate(),
2022 * since we currently handle a full code cache uniformly.
2023 */
2024 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2025 UseInterpreter = true;
2026 if (UseCompiler || AlwaysCompileLoopMethods ) {
2027 if (xtty != NULL) {
2028 ResourceMark rm;
2029 stringStream s;
2030 // Dump code cache state into a buffer before locking the tty,
2031 // because log_state() will use locks causing lock conflicts.
2032 CodeCache::log_state(&s);
2033 // Lock to prevent tearing
2034 ttyLocker ttyl;
2035 xtty->begin_elem("code_cache_full");
2036 xtty->print("%s", s.as_string());
2037 xtty->stamp();
2038 xtty->end_elem();
2039 }
2040
2041 #ifndef PRODUCT
2042 if (CompileTheWorld || ExitOnFullCodeCache) {
2043 codecache_print(/* detailed= */ true);
2044 before_exit(JavaThread::current());
2045 exit_globals(); // will delete tty
2046 vm_direct_exit(CompileTheWorld ? 0 : 1);
2047 }
2048 #endif
2049 if (UseCodeCacheFlushing) {
2050 // Since code cache is full, immediately stop new compiles
2051 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2052 NMethodSweeper::log_sweep("disable_compiler");
2053 }
2054 } else {
2055 disable_compilation_forever();
2056 }
2057
2058 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2059 }
2060 }
2061
2062 // ------------------------------------------------------------------
2063 // CompileBroker::set_last_compile
2064 //
2065 // Record this compilation for debugging purposes.
2066 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) {
2067 ResourceMark rm;
2068 char* method_name = method->name()->as_C_string();
2069 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2070 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2071 char current_method[CompilerCounters::cmname_buffer_length];
2072 size_t maxLen = CompilerCounters::cmname_buffer_length;
2073
2074 if (UsePerfData) {
2075 const char* class_name = method->method_holder()->name()->as_C_string();
2076
2077 size_t s1len = strlen(class_name);
2078 size_t s2len = strlen(method_name);
2079
2080 // check if we need to truncate the string
2081 if (s1len + s2len + 2 > maxLen) {
2082
2083 // the strategy is to lop off the leading characters of the
2084 // class name and the trailing characters of the method name.
2085
2086 if (s2len + 2 > maxLen) {
2087 // lop of the entire class name string, let snprintf handle
2088 // truncation of the method name.
2089 class_name += s1len; // null string
2090 }
2091 else {
2092 // lop off the extra characters from the front of the class name
2093 class_name += ((s1len + s2len + 2) - maxLen);
2094 }
2095 }
2096
2097 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2098 }
2099
2100 if (CICountOSR && is_osr) {
2101 _last_compile_type = osr_compile;
2102 } else {
2103 _last_compile_type = normal_compile;
2104 }
2105 _last_compile_level = comp_level;
2106
2107 if (UsePerfData) {
2108 CompilerCounters* counters = thread->counters();
2109 counters->set_current_method(current_method);
2110 counters->set_compile_type((jlong)_last_compile_type);
2111 }
2112 }
2113
2114
2115 // ------------------------------------------------------------------
2116 // CompileBroker::push_jni_handle_block
2117 //
2118 // Push on a new block of JNI handles.
2119 void CompileBroker::push_jni_handle_block() {
2120 JavaThread* thread = JavaThread::current();
2121
2122 // Allocate a new block for JNI handles.
2123 // Inlined code from jni_PushLocalFrame()
2124 JNIHandleBlock* java_handles = thread->active_handles();
2125 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2126 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2127 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2128 thread->set_active_handles(compile_handles);
2129 }
2130
2131
2132 // ------------------------------------------------------------------
2133 // CompileBroker::pop_jni_handle_block
2134 //
2135 // Pop off the current block of JNI handles.
2136 void CompileBroker::pop_jni_handle_block() {
2137 JavaThread* thread = JavaThread::current();
2138
2139 // Release our JNI handle block
2140 JNIHandleBlock* compile_handles = thread->active_handles();
2141 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2142 thread->set_active_handles(java_handles);
2143 compile_handles->set_pop_frame_link(NULL);
2144 JNIHandleBlock::release_block(compile_handles, thread); // may block
2145 }
2146
2147 // ------------------------------------------------------------------
2148 // CompileBroker::collect_statistics
2149 //
2150 // Collect statistics about the compilation.
2151
2152 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2153 bool success = task->is_success();
2154 methodHandle method (thread, task->method());
2155 uint compile_id = task->compile_id();
2156 bool is_osr = (task->osr_bci() != standard_entry_bci);
2157 nmethod* code = task->code();
2158 CompilerCounters* counters = thread->counters();
2159
2160 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2161 MutexLocker locker(CompileStatistics_lock);
2162
2163 // _perf variables are production performance counters which are
2164 // updated regardless of the setting of the CITime and CITimeEach flags
2165 //
2166
2167 // account all time, including bailouts and failures in this counter;
2168 // C1 and C2 counters are counting both successful and unsuccessful compiles
2169 _t_total_compilation.add(time);
2170
2171 if (!success) {
2172 _total_bailout_count++;
2173 if (UsePerfData) {
2174 _perf_last_failed_method->set_value(counters->current_method());
2175 _perf_last_failed_type->set_value(counters->compile_type());
2176 _perf_total_bailout_count->inc();
2177 }
2178 _t_bailedout_compilation.add(time);
2179 } else if (code == NULL) {
2180 if (UsePerfData) {
2181 _perf_last_invalidated_method->set_value(counters->current_method());
2182 _perf_last_invalidated_type->set_value(counters->compile_type());
2183 _perf_total_invalidated_count->inc();
2184 }
2185 _total_invalidated_count++;
2186 _t_invalidated_compilation.add(time);
2187 } else {
2188 // Compilation succeeded
2189
2190 // update compilation ticks - used by the implementation of
2191 // java.lang.management.CompilationMBean
2192 _perf_total_compilation->inc(time.ticks());
2193 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2194
2195 if (CITime) {
2196 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2197 if (is_osr) {
2198 _t_osr_compilation.add(time);
2199 _sum_osr_bytes_compiled += bytes_compiled;
2200 } else {
2201 _t_standard_compilation.add(time);
2202 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2203 }
2204
2205 #if INCLUDE_JVMCI
2206 AbstractCompiler* comp = compiler(task->comp_level());
2207 if (comp) {
2208 CompilerStatistics* stats = comp->stats();
2209 if (stats) {
2210 if (is_osr) {
2211 stats->_osr.update(time, bytes_compiled);
2212 } else {
2213 stats->_standard.update(time, bytes_compiled);
2214 }
2215 stats->_nmethods_size += code->total_size();
2216 stats->_nmethods_code_size += code->insts_size();
2217 } else { // if (!stats)
2218 assert(false, "Compiler statistics object must exist");
2219 }
2220 } else { // if (!comp)
2221 assert(false, "Compiler object must exist");
2222 }
2223 #endif // INCLUDE_JVMCI
2224 }
2225
2226 if (UsePerfData) {
2227 // save the name of the last method compiled
2228 _perf_last_method->set_value(counters->current_method());
2229 _perf_last_compile_type->set_value(counters->compile_type());
2230 _perf_last_compile_size->set_value(method->code_size() +
2231 task->num_inlined_bytecodes());
2232 if (is_osr) {
2233 _perf_osr_compilation->inc(time.ticks());
2234 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2235 } else {
2236 _perf_standard_compilation->inc(time.ticks());
2237 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2238 }
2239 }
2240
2241 if (CITimeEach) {
2242 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2243 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2244 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2245 }
2246
2247 // Collect counts of successful compilations
2248 _sum_nmethod_size += code->total_size();
2249 _sum_nmethod_code_size += code->insts_size();
2250 _total_compile_count++;
2251
2252 if (UsePerfData) {
2253 _perf_sum_nmethod_size->inc( code->total_size());
2254 _perf_sum_nmethod_code_size->inc(code->insts_size());
2255 _perf_total_compile_count->inc();
2256 }
2257
2258 if (is_osr) {
2259 if (UsePerfData) _perf_total_osr_compile_count->inc();
2260 _total_osr_compile_count++;
2261 } else {
2262 if (UsePerfData) _perf_total_standard_compile_count->inc();
2263 _total_standard_compile_count++;
2264 }
2265 }
2266 // set the current method for the thread to null
2267 if (UsePerfData) counters->set_current_method("");
2268 }
2269
2270 const char* CompileBroker::compiler_name(int comp_level) {
2271 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2272 if (comp == NULL) {
2273 return "no compiler";
2274 } else {
2275 return (comp->name());
2276 }
2277 }
2278
2279 #if INCLUDE_JVMCI
2280 void CompileBroker::print_times(AbstractCompiler* comp) {
2281 CompilerStatistics* stats = comp->stats();
2282 if (stats) {
2283 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}",
2284 comp->name(), stats->bytes_per_second(),
2285 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2286 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2287 stats->_nmethods_size, stats->_nmethods_code_size);
2288 } else { // if (!stats)
2289 assert(false, "Compiler statistics object must exist");
2290 }
2291 comp->print_timers();
2292 }
2293 #endif // INCLUDE_JVMCI
2294
2295 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2296 #if INCLUDE_JVMCI
2297 elapsedTimer standard_compilation;
2298 elapsedTimer total_compilation;
2299 elapsedTimer osr_compilation;
2300
2301 int standard_bytes_compiled = 0;
2302 int osr_bytes_compiled = 0;
2303
2304 int standard_compile_count = 0;
2305 int osr_compile_count = 0;
2306 int total_compile_count = 0;
2307
2308 int nmethods_size = 0;
2309 int nmethods_code_size = 0;
2310 bool printedHeader = false;
2311
2312 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2313 AbstractCompiler* comp = _compilers[i];
2314 if (comp != NULL) {
2315 if (per_compiler && aggregate && !printedHeader) {
2316 printedHeader = true;
2317 tty->cr();
2318 tty->print_cr("Individual compiler times (for compiled methods only)");
2319 tty->print_cr("------------------------------------------------");
2320 tty->cr();
2321 }
2322 CompilerStatistics* stats = comp->stats();
2323
2324 if (stats) {
2325 standard_compilation.add(stats->_standard._time);
2326 osr_compilation.add(stats->_osr._time);
2327
2328 standard_bytes_compiled += stats->_standard._bytes;
2329 osr_bytes_compiled += stats->_osr._bytes;
2330
2331 standard_compile_count += stats->_standard._count;
2332 osr_compile_count += stats->_osr._count;
2333
2334 nmethods_size += stats->_nmethods_size;
2335 nmethods_code_size += stats->_nmethods_code_size;
2336 } else { // if (!stats)
2337 assert(false, "Compiler statistics object must exist");
2338 }
2339
2340 if (per_compiler) {
2341 print_times(comp);
2342 }
2343 }
2344 }
2345 total_compile_count = osr_compile_count + standard_compile_count;
2346 total_compilation.add(osr_compilation);
2347 total_compilation.add(standard_compilation);
2348
2349 // In hosted mode, print the JVMCI compiler specific counters manually.
2350 if (!UseJVMCICompiler) {
2351 JVMCICompiler::print_compilation_timers();
2352 }
2353 #else // INCLUDE_JVMCI
2354 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2355 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2356 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2357
2358 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2359 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2360
2361 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2362 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2363 int total_compile_count = CompileBroker::_total_compile_count;
2364
2365 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2366 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2367 #endif // INCLUDE_JVMCI
2368
2369 if (!aggregate) {
2370 return;
2371 }
2372 tty->cr();
2373 tty->print_cr("Accumulated compiler times");
2374 tty->print_cr("----------------------------------------------------------");
2375 //0000000000111111111122222222223333333333444444444455555555556666666666
2376 //0123456789012345678901234567890123456789012345678901234567890123456789
2377 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2378 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2379 standard_compilation.seconds(),
2380 standard_compilation.seconds() / standard_compile_count);
2381 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2382 CompileBroker::_t_bailedout_compilation.seconds(),
2383 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2384 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2385 osr_compilation.seconds(),
2386 osr_compilation.seconds() / osr_compile_count);
2387 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2388 CompileBroker::_t_invalidated_compilation.seconds(),
2389 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2390
2391 AbstractCompiler *comp = compiler(CompLevel_simple);
2392 if (comp != NULL) {
2393 tty->cr();
2394 comp->print_timers();
2395 }
2396 comp = compiler(CompLevel_full_optimization);
2397 if (comp != NULL) {
2398 tty->cr();
2399 comp->print_timers();
2400 }
2401 tty->cr();
2402 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2403 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2404 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2405 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2406 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2407 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2408 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2409 double tcs = total_compilation.seconds();
2410 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2411 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2412 tty->cr();
2413 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2414 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2415 }
2416
2417 // Debugging output for failure
2418 void CompileBroker::print_last_compile() {
2419 if (_last_compile_level != CompLevel_none &&
2420 compiler(_last_compile_level) != NULL &&
2421 _last_compile_type != no_compile) {
2422 if (_last_compile_type == osr_compile) {
2423 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2424 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2425 } else {
2426 tty->print_cr("Last parse: %d+++(%d) %s",
2427 _compilation_id, _last_compile_level, _last_method_compiled);
2428 }
2429 }
2430 }
2431
2432 // Print general/accumulated JIT information.
2433 void CompileBroker::print_info(outputStream *out) {
2434 if (out == NULL) out = tty;
2435 out->cr();
2436 out->print_cr("======================");
2437 out->print_cr(" General JIT info ");
2438 out->print_cr("======================");
2439 out->cr();
2440 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2441 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2442 out->cr();
2443 out->print_cr("CodeCache overview");
2444 out->print_cr("--------------------------------------------------------");
2445 out->cr();
2446 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2447 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2448 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2449 out->cr();
2450
2451 out->cr();
2452 out->print_cr("CodeCache cleaning overview");
2453 out->print_cr("--------------------------------------------------------");
2454 out->cr();
2455 NMethodSweeper::print(out);
2456 out->print_cr("--------------------------------------------------------");
2457 out->cr();
2458 }
2459
2460 // Note: tty_lock must not be held upon entry to this function.
2461 // Print functions called from herein do "micro-locking" on tty_lock.
2462 // That's a tradeoff which keeps together important blocks of output.
2463 // At the same time, continuous tty_lock hold time is kept in check,
2464 // preventing concurrently printing threads from stalling a long time.
2465 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) {
2466 TimeStamp ts_total;
2467 TimeStamp ts;
2468
2469 bool allFun = !strcmp(function, "all");
2470 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2471 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2472 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2473 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2474 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2475 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2476 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2477 bool discard = !strcmp(function, "discard") || allFun;
2478
2479 if (out == NULL) {
2480 out = tty;
2481 }
2482
2483 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2484 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2485 out->cr();
2486 return;
2487 }
2488
2489 ts_total.update(); // record starting point
2490
2491 if (aggregate) {
2492 print_info(out);
2493 }
2494
2495 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2496 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function.
2497 // When we request individual parts of the analysis via the jcmd interface, it is possible
2498 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2499 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2500 // across user interaction.
2501 ts.update(); // record starting point
2502 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2503 out->cr();
2504 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds());
2505 out->cr();
2506
2507 if (aggregate) {
2508 // It is sufficient to hold the CodeCache_lock only for the aggregate step.
2509 // All other functions operate on aggregated data - except MethodNames, but that should be safe.
2510 // The separate CodeHeapStateAnalytics_lock protects the printing functions against
2511 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock.
2512 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2513 // leading to an unnecessarily long hold time of the CodeCache_lock.
2514 ts.update(); // record starting point
2515 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2516 out->cr();
2517 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds());
2518 out->cr();
2519
2520 ts.update(); // record starting point
2521 CodeCache::aggregate(out, granularity);
2522 out->cr();
2523 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds());
2524 out->cr();
2525 }
2526
2527 if (usedSpace) CodeCache::print_usedSpace(out);
2528 if (freeSpace) CodeCache::print_freeSpace(out);
2529 if (methodCount) CodeCache::print_count(out);
2530 if (methodSpace) CodeCache::print_space(out);
2531 if (methodAge) CodeCache::print_age(out);
2532 if (methodNames) CodeCache::print_names(out);
2533 if (discard) CodeCache::discard(out);
2534
2535 out->cr();
2536 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds());
2537 out->cr();
2538 }