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