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