1 /*
2 * Copyright (c) 1999, 2020, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "classfile/symbolTable.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "classfile/vmSymbols.hpp"
30 #include "code/codeCache.hpp"
31 #include "code/codeHeapState.hpp"
32 #include "code/dependencyContext.hpp"
33 #include "compiler/compilationPolicy.hpp"
34 #include "compiler/compileBroker.hpp"
35 #include "compiler/compileLog.hpp"
36 #include "compiler/compilerEvent.hpp"
37 #include "compiler/compilerOracle.hpp"
38 #include "compiler/directivesParser.hpp"
39 #include "interpreter/linkResolver.hpp"
40 #include "jfr/jfrEvents.hpp"
41 #include "logging/log.hpp"
42 #include "logging/logStream.hpp"
43 #include "memory/allocation.inline.hpp"
44 #include "memory/resourceArea.hpp"
45 #include "memory/universe.hpp"
46 #include "oops/methodData.hpp"
47 #include "oops/method.inline.hpp"
48 #include "oops/oop.inline.hpp"
49 #include "prims/nativeLookup.hpp"
50 #include "prims/whitebox.hpp"
51 #include "runtime/arguments.hpp"
52 #include "runtime/atomic.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.inline.hpp"
56 #include "runtime/javaCalls.hpp"
57 #include "runtime/jniHandles.inline.hpp"
58 #include "runtime/os.hpp"
59 #include "runtime/safepointVerifiers.hpp"
60 #include "runtime/sharedRuntime.hpp"
61 #include "runtime/sweeper.hpp"
62 #include "runtime/timerTrace.hpp"
63 #include "runtime/vframe.inline.hpp"
64 #include "utilities/debug.hpp"
65 #include "utilities/dtrace.hpp"
66 #include "utilities/events.hpp"
67 #include "utilities/formatBuffer.hpp"
68 #include "utilities/macros.hpp"
69 #ifdef COMPILER1
70 #include "c1/c1_Compiler.hpp"
71 #endif
72 #if INCLUDE_JVMCI
73 #include "jvmci/jvmciEnv.hpp"
74 #include "jvmci/jvmciRuntime.hpp"
75 #endif
76 #ifdef COMPILER2
77 #include "opto/c2compiler.hpp"
78 #endif
79
80 #ifdef DTRACE_ENABLED
81
82 // Only bother with this argument setup if dtrace is available
83
84 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
85 { \
86 Symbol* klass_name = (method)->klass_name(); \
87 Symbol* name = (method)->name(); \
88 Symbol* signature = (method)->signature(); \
89 HOTSPOT_METHOD_COMPILE_BEGIN( \
90 (char *) comp_name, strlen(comp_name), \
91 (char *) klass_name->bytes(), klass_name->utf8_length(), \
92 (char *) name->bytes(), name->utf8_length(), \
93 (char *) signature->bytes(), signature->utf8_length()); \
94 }
95
96 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
97 { \
98 Symbol* klass_name = (method)->klass_name(); \
99 Symbol* name = (method)->name(); \
100 Symbol* signature = (method)->signature(); \
101 HOTSPOT_METHOD_COMPILE_END( \
102 (char *) comp_name, strlen(comp_name), \
103 (char *) klass_name->bytes(), klass_name->utf8_length(), \
104 (char *) name->bytes(), name->utf8_length(), \
105 (char *) signature->bytes(), signature->utf8_length(), (success)); \
106 }
107
108 #else // ndef DTRACE_ENABLED
109
110 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
111 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
112
113 #endif // ndef DTRACE_ENABLED
114
115 bool CompileBroker::_initialized = false;
116 volatile bool CompileBroker::_should_block = false;
117 volatile int CompileBroker::_print_compilation_warning = 0;
118 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
119
120 // The installed compiler(s)
121 AbstractCompiler* CompileBroker::_compilers[2];
122
123 // The maximum numbers of compiler threads to be determined during startup.
124 int CompileBroker::_c1_count = 0;
125 int CompileBroker::_c2_count = 0;
126
127 // An array of compiler names as Java String objects
128 jobject* CompileBroker::_compiler1_objects = NULL;
129 jobject* CompileBroker::_compiler2_objects = NULL;
130
131 CompileLog** CompileBroker::_compiler1_logs = NULL;
132 CompileLog** CompileBroker::_compiler2_logs = NULL;
133
134 // These counters are used to assign an unique ID to each compilation.
135 volatile jint CompileBroker::_compilation_id = 0;
136 volatile jint CompileBroker::_osr_compilation_id = 0;
137
138 // Performance counters
139 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
140 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
141 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
142
143 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
144 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
145 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
146 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
147 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
148
149 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
150 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
151 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
152 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
153
154 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
155 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
156 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
157 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
158 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
159 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
160 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
161
162 // Timers and counters for generating statistics
163 elapsedTimer CompileBroker::_t_total_compilation;
164 elapsedTimer CompileBroker::_t_osr_compilation;
165 elapsedTimer CompileBroker::_t_standard_compilation;
166 elapsedTimer CompileBroker::_t_invalidated_compilation;
167 elapsedTimer CompileBroker::_t_bailedout_compilation;
168
169 int CompileBroker::_total_bailout_count = 0;
170 int CompileBroker::_total_invalidated_count = 0;
171 int CompileBroker::_total_compile_count = 0;
172 int CompileBroker::_total_osr_compile_count = 0;
173 int CompileBroker::_total_standard_compile_count = 0;
174 int CompileBroker::_total_compiler_stopped_count = 0;
175 int CompileBroker::_total_compiler_restarted_count = 0;
176
177 int CompileBroker::_sum_osr_bytes_compiled = 0;
178 int CompileBroker::_sum_standard_bytes_compiled = 0;
179 int CompileBroker::_sum_nmethod_size = 0;
180 int CompileBroker::_sum_nmethod_code_size = 0;
181
182 long CompileBroker::_peak_compilation_time = 0;
183
184 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
185 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
186
187
188
189 class CompilationLog : public StringEventLog {
190 public:
CompilationLog()191 CompilationLog() : StringEventLog("Compilation events", "jit") {
192 }
193
log_compile(JavaThread * thread,CompileTask * task)194 void log_compile(JavaThread* thread, CompileTask* task) {
195 StringLogMessage lm;
196 stringStream sstr(lm.buffer(), lm.size());
197 // msg.time_stamp().update_to(tty->time_stamp().ticks());
198 task->print(&sstr, NULL, true, false);
199 log(thread, "%s", (const char*)lm);
200 }
201
log_nmethod(JavaThread * thread,nmethod * nm)202 void log_nmethod(JavaThread* thread, nmethod* nm) {
203 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]",
204 nm->compile_id(), nm->is_osr_method() ? "%" : "",
205 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
206 }
207
log_failure(JavaThread * thread,CompileTask * task,const char * reason,const char * retry_message)208 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
209 StringLogMessage lm;
210 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
211 if (retry_message != NULL) {
212 lm.append(" (%s)", retry_message);
213 }
214 lm.print("\n");
215 log(thread, "%s", (const char*)lm);
216 }
217
log_metaspace_failure(const char * reason)218 void log_metaspace_failure(const char* reason) {
219 ResourceMark rm;
220 StringLogMessage lm;
221 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason);
222 lm.print("\n");
223 log(JavaThread::current(), "%s", (const char*)lm);
224 }
225 };
226
227 static CompilationLog* _compilation_log = NULL;
228
compileBroker_init()229 bool compileBroker_init() {
230 if (LogEvents) {
231 _compilation_log = new CompilationLog();
232 }
233
234 // init directives stack, adding default directive
235 DirectivesStack::init();
236
237 if (DirectivesParser::has_file()) {
238 return DirectivesParser::parse_from_flag();
239 } else if (CompilerDirectivesPrint) {
240 // Print default directive even when no other was added
241 DirectivesStack::print(tty);
242 }
243
244 return true;
245 }
246
CompileTaskWrapper(CompileTask * task)247 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
248 CompilerThread* thread = CompilerThread::current();
249 thread->set_task(task);
250 #if INCLUDE_JVMCI
251 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) {
252 task->set_jvmci_compiler_thread(thread);
253 }
254 #endif
255 CompileLog* log = thread->log();
256 if (log != NULL && !task->is_unloaded()) task->log_task_start(log);
257 }
258
~CompileTaskWrapper()259 CompileTaskWrapper::~CompileTaskWrapper() {
260 CompilerThread* thread = CompilerThread::current();
261 CompileTask* task = thread->task();
262 CompileLog* log = thread->log();
263 if (log != NULL && !task->is_unloaded()) task->log_task_done(log);
264 thread->set_task(NULL);
265 task->set_code_handle(NULL);
266 thread->set_env(NULL);
267 if (task->is_blocking()) {
268 bool free_task = false;
269 {
270 MutexLocker notifier(thread, task->lock());
271 task->mark_complete();
272 #if INCLUDE_JVMCI
273 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) {
274 if (!task->has_waiter()) {
275 // The waiting thread timed out and thus did not free the task.
276 free_task = true;
277 }
278 task->set_jvmci_compiler_thread(NULL);
279 }
280 #endif
281 if (!free_task) {
282 // Notify the waiting thread that the compilation has completed
283 // so that it can free the task.
284 task->lock()->notify_all();
285 }
286 }
287 if (free_task) {
288 // The task can only be freed once the task lock is released.
289 CompileTask::free(task);
290 }
291 } else {
292 task->mark_complete();
293
294 // By convention, the compiling thread is responsible for
295 // recycling a non-blocking CompileTask.
296 CompileTask::free(task);
297 }
298 }
299
300 /**
301 * Check if a CompilerThread can be removed and update count if requested.
302 */
can_remove(CompilerThread * ct,bool do_it)303 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) {
304 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here");
305 if (!ReduceNumberOfCompilerThreads) return false;
306
307 AbstractCompiler *compiler = ct->compiler();
308 int compiler_count = compiler->num_compiler_threads();
309 bool c1 = compiler->is_c1();
310
311 // Keep at least 1 compiler thread of each type.
312 if (compiler_count < 2) return false;
313
314 // Keep thread alive for at least some time.
315 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false;
316
317 #if INCLUDE_JVMCI
318 if (compiler->is_jvmci()) {
319 // Handles for JVMCI thread objects may get released concurrently.
320 if (do_it) {
321 assert(CompileThread_lock->owner() == ct, "must be holding lock");
322 } else {
323 // Skip check if it's the last thread and let caller check again.
324 return true;
325 }
326 }
327 #endif
328
329 // We only allow the last compiler thread of each type to get removed.
330 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1)
331 : compiler2_object(compiler_count - 1);
332 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) {
333 if (do_it) {
334 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent.
335 compiler->set_num_compiler_threads(compiler_count - 1);
336 #if INCLUDE_JVMCI
337 if (compiler->is_jvmci()) {
338 // Old j.l.Thread object can die when no longer referenced elsewhere.
339 JNIHandles::destroy_global(compiler2_object(compiler_count - 1));
340 _compiler2_objects[compiler_count - 1] = NULL;
341 }
342 #endif
343 }
344 return true;
345 }
346 return false;
347 }
348
349 /**
350 * Add a CompileTask to a CompileQueue.
351 */
add(CompileTask * task)352 void CompileQueue::add(CompileTask* task) {
353 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
354
355 task->set_next(NULL);
356 task->set_prev(NULL);
357
358 if (_last == NULL) {
359 // The compile queue is empty.
360 assert(_first == NULL, "queue is empty");
361 _first = task;
362 _last = task;
363 } else {
364 // Append the task to the queue.
365 assert(_last->next() == NULL, "not last");
366 _last->set_next(task);
367 task->set_prev(_last);
368 _last = task;
369 }
370 ++_size;
371
372 // Mark the method as being in the compile queue.
373 task->method()->set_queued_for_compilation();
374
375 if (CIPrintCompileQueue) {
376 print_tty();
377 }
378
379 if (LogCompilation && xtty != NULL) {
380 task->log_task_queued();
381 }
382
383 // Notify CompilerThreads that a task is available.
384 MethodCompileQueue_lock->notify_all();
385 }
386
387 /**
388 * Empties compilation queue by putting all compilation tasks onto
389 * a freelist. Furthermore, the method wakes up all threads that are
390 * waiting on a compilation task to finish. This can happen if background
391 * compilation is disabled.
392 */
free_all()393 void CompileQueue::free_all() {
394 MutexLocker mu(MethodCompileQueue_lock);
395 CompileTask* next = _first;
396
397 // Iterate over all tasks in the compile queue
398 while (next != NULL) {
399 CompileTask* current = next;
400 next = current->next();
401 {
402 // Wake up thread that blocks on the compile task.
403 MutexLocker ct_lock(current->lock());
404 current->lock()->notify();
405 }
406 // Put the task back on the freelist.
407 CompileTask::free(current);
408 }
409 _first = NULL;
410
411 // Wake up all threads that block on the queue.
412 MethodCompileQueue_lock->notify_all();
413 }
414
415 /**
416 * Get the next CompileTask from a CompileQueue
417 */
get()418 CompileTask* CompileQueue::get() {
419 // save methods from RedefineClasses across safepoint
420 // across MethodCompileQueue_lock below.
421 methodHandle save_method;
422 methodHandle save_hot_method;
423
424 MonitorLocker locker(MethodCompileQueue_lock);
425 // If _first is NULL we have no more compile jobs. There are two reasons for
426 // having no compile jobs: First, we compiled everything we wanted. Second,
427 // we ran out of code cache so compilation has been disabled. In the latter
428 // case we perform code cache sweeps to free memory such that we can re-enable
429 // compilation.
430 while (_first == NULL) {
431 // Exit loop if compilation is disabled forever
432 if (CompileBroker::is_compilation_disabled_forever()) {
433 return NULL;
434 }
435
436 // If there are no compilation tasks and we can compile new jobs
437 // (i.e., there is enough free space in the code cache) there is
438 // no need to invoke the sweeper. As a result, the hotness of methods
439 // remains unchanged. This behavior is desired, since we want to keep
440 // the stable state, i.e., we do not want to evict methods from the
441 // code cache if it is unnecessary.
442 // We need a timed wait here, since compiler threads can exit if compilation
443 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
444 // is not critical and we do not want idle compiler threads to wake up too often.
445 locker.wait(5*1000);
446
447 if (UseDynamicNumberOfCompilerThreads && _first == NULL) {
448 // Still nothing to compile. Give caller a chance to stop this thread.
449 if (CompileBroker::can_remove(CompilerThread::current(), false)) return NULL;
450 }
451 }
452
453 if (CompileBroker::is_compilation_disabled_forever()) {
454 return NULL;
455 }
456
457 CompileTask* task;
458 {
459 NoSafepointVerifier nsv;
460 task = CompilationPolicy::policy()->select_task(this);
461 if (task != NULL) {
462 task = task->select_for_compilation();
463 }
464 }
465
466 if (task != NULL) {
467 // Save method pointers across unlock safepoint. The task is removed from
468 // the compilation queue, which is walked during RedefineClasses.
469 Thread* thread = Thread::current();
470 save_method = methodHandle(thread, task->method());
471 save_hot_method = methodHandle(thread, task->hot_method());
472
473 remove(task);
474 }
475 purge_stale_tasks(); // may temporarily release MCQ lock
476 return task;
477 }
478
479 // Clean & deallocate stale compile tasks.
480 // Temporarily releases MethodCompileQueue lock.
purge_stale_tasks()481 void CompileQueue::purge_stale_tasks() {
482 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
483 if (_first_stale != NULL) {
484 // Stale tasks are purged when MCQ lock is released,
485 // but _first_stale updates are protected by MCQ lock.
486 // Once task processing starts and MCQ lock is released,
487 // other compiler threads can reuse _first_stale.
488 CompileTask* head = _first_stale;
489 _first_stale = NULL;
490 {
491 MutexUnlocker ul(MethodCompileQueue_lock);
492 for (CompileTask* task = head; task != NULL; ) {
493 CompileTask* next_task = task->next();
494 CompileTaskWrapper ctw(task); // Frees the task
495 task->set_failure_reason("stale task");
496 task = next_task;
497 }
498 }
499 }
500 }
501
remove(CompileTask * task)502 void CompileQueue::remove(CompileTask* task) {
503 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
504 if (task->prev() != NULL) {
505 task->prev()->set_next(task->next());
506 } else {
507 // max is the first element
508 assert(task == _first, "Sanity");
509 _first = task->next();
510 }
511
512 if (task->next() != NULL) {
513 task->next()->set_prev(task->prev());
514 } else {
515 // max is the last element
516 assert(task == _last, "Sanity");
517 _last = task->prev();
518 }
519 --_size;
520 }
521
remove_and_mark_stale(CompileTask * task)522 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
523 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock");
524 remove(task);
525
526 // Enqueue the task for reclamation (should be done outside MCQ lock)
527 task->set_next(_first_stale);
528 task->set_prev(NULL);
529 _first_stale = task;
530 }
531
532 // methods in the compile queue need to be marked as used on the stack
533 // so that they don't get reclaimed by Redefine Classes
mark_on_stack()534 void CompileQueue::mark_on_stack() {
535 CompileTask* task = _first;
536 while (task != NULL) {
537 task->mark_on_stack();
538 task = task->next();
539 }
540 }
541
542
compile_queue(int comp_level)543 CompileQueue* CompileBroker::compile_queue(int comp_level) {
544 if (is_c2_compile(comp_level)) return _c2_compile_queue;
545 if (is_c1_compile(comp_level)) return _c1_compile_queue;
546 return NULL;
547 }
548
print_compile_queues(outputStream * st)549 void CompileBroker::print_compile_queues(outputStream* st) {
550 st->print_cr("Current compiles: ");
551
552 char buf[2000];
553 int buflen = sizeof(buf);
554 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true);
555
556 st->cr();
557 if (_c1_compile_queue != NULL) {
558 _c1_compile_queue->print(st);
559 }
560 if (_c2_compile_queue != NULL) {
561 _c2_compile_queue->print(st);
562 }
563 }
564
print(outputStream * st)565 void CompileQueue::print(outputStream* st) {
566 assert_locked_or_safepoint(MethodCompileQueue_lock);
567 st->print_cr("%s:", name());
568 CompileTask* task = _first;
569 if (task == NULL) {
570 st->print_cr("Empty");
571 } else {
572 while (task != NULL) {
573 task->print(st, NULL, true, true);
574 task = task->next();
575 }
576 }
577 st->cr();
578 }
579
print_tty()580 void CompileQueue::print_tty() {
581 ResourceMark rm;
582 stringStream ss;
583 // Dump the compile queue into a buffer before locking the tty
584 print(&ss);
585 {
586 ttyLocker ttyl;
587 tty->print("%s", ss.as_string());
588 }
589 }
590
CompilerCounters()591 CompilerCounters::CompilerCounters() {
592 _current_method[0] = '\0';
593 _compile_type = CompileBroker::no_compile;
594 }
595
596 #if INCLUDE_JFR && COMPILER2_OR_JVMCI
597 // It appends new compiler phase names to growable array phase_names(a new CompilerPhaseType mapping
598 // in compiler/compilerEvent.cpp) and registers it with its serializer.
599 //
600 // c2 uses explicit CompilerPhaseType idToPhase mapping in opto/phasetype.hpp,
601 // so if c2 is used, it should be always registered first.
602 // This function is called during vm initialization.
register_jfr_phasetype_serializer(CompilerType compiler_type)603 void register_jfr_phasetype_serializer(CompilerType compiler_type) {
604 ResourceMark rm;
605 static bool first_registration = true;
606 if (compiler_type == compiler_jvmci) {
607 // register serializer, phases will be added later lazily.
608 GrowableArray<const char*>* jvmci_phase_names = new GrowableArray<const char*>(1);
609 jvmci_phase_names->append("NOT_A_PHASE_NAME");
610 CompilerEvent::PhaseEvent::register_phases(jvmci_phase_names);
611 first_registration = false;
612 #ifdef COMPILER2
613 } else if (compiler_type == compiler_c2) {
614 assert(first_registration, "invariant"); // c2 must be registered first.
615 GrowableArray<const char*>* c2_phase_names = new GrowableArray<const char*>(PHASE_NUM_TYPES);
616 for (int i = 0; i < PHASE_NUM_TYPES; i++) {
617 c2_phase_names->append(CompilerPhaseTypeHelper::to_string((CompilerPhaseType)i));
618 }
619 CompilerEvent::PhaseEvent::register_phases(c2_phase_names);
620 first_registration = false;
621 #endif // COMPILER2
622 }
623 }
624 #endif // INCLUDE_JFR && COMPILER2_OR_JVMCI
625
626 // ------------------------------------------------------------------
627 // CompileBroker::compilation_init
628 //
629 // Initialize the Compilation object
compilation_init_phase1(Thread * THREAD)630 void CompileBroker::compilation_init_phase1(Thread* THREAD) {
631 // No need to initialize compilation system if we do not use it.
632 if (!UseCompiler) {
633 return;
634 }
635 // Set the interface to the current compiler(s).
636 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
637 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
638
639 #if INCLUDE_JVMCI
640 if (EnableJVMCI) {
641 // This is creating a JVMCICompiler singleton.
642 JVMCICompiler* jvmci = new JVMCICompiler();
643
644 if (UseJVMCICompiler) {
645 _compilers[1] = jvmci;
646 if (FLAG_IS_DEFAULT(JVMCIThreads)) {
647 if (BootstrapJVMCI) {
648 // JVMCI will bootstrap so give it more threads
649 _c2_count = MIN2(32, os::active_processor_count());
650 }
651 } else {
652 _c2_count = JVMCIThreads;
653 }
654 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) {
655 } else {
656 _c1_count = JVMCIHostThreads;
657 }
658 }
659 }
660 #endif // INCLUDE_JVMCI
661
662 #ifdef COMPILER1
663 if (_c1_count > 0) {
664 _compilers[0] = new Compiler();
665 }
666 #endif // COMPILER1
667
668 #ifdef COMPILER2
669 if (true JVMCI_ONLY( && !UseJVMCICompiler)) {
670 if (_c2_count > 0) {
671 _compilers[1] = new C2Compiler();
672 // Register c2 first as c2 CompilerPhaseType idToPhase mapping is explicit.
673 // idToPhase mapping for c2 is in opto/phasetype.hpp
674 JFR_ONLY(register_jfr_phasetype_serializer(compiler_c2);)
675 }
676 }
677 #endif // COMPILER2
678
679 #if INCLUDE_JVMCI
680 // Register after c2 registration.
681 // JVMCI CompilerPhaseType idToPhase mapping is dynamic.
682 if (EnableJVMCI) {
683 JFR_ONLY(register_jfr_phasetype_serializer(compiler_jvmci);)
684 }
685 #endif // INCLUDE_JVMCI
686
687 // Start the compiler thread(s) and the sweeper thread
688 init_compiler_sweeper_threads();
689 // totalTime performance counter is always created as it is required
690 // by the implementation of java.lang.management.CompilationMBean.
691 {
692 // Ensure OOM leads to vm_exit_during_initialization.
693 EXCEPTION_MARK;
694 _perf_total_compilation =
695 PerfDataManager::create_counter(JAVA_CI, "totalTime",
696 PerfData::U_Ticks, CHECK);
697 }
698
699 if (UsePerfData) {
700
701 EXCEPTION_MARK;
702
703 // create the jvmstat performance counters
704 _perf_osr_compilation =
705 PerfDataManager::create_counter(SUN_CI, "osrTime",
706 PerfData::U_Ticks, CHECK);
707
708 _perf_standard_compilation =
709 PerfDataManager::create_counter(SUN_CI, "standardTime",
710 PerfData::U_Ticks, CHECK);
711
712 _perf_total_bailout_count =
713 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
714 PerfData::U_Events, CHECK);
715
716 _perf_total_invalidated_count =
717 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
718 PerfData::U_Events, CHECK);
719
720 _perf_total_compile_count =
721 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
722 PerfData::U_Events, CHECK);
723 _perf_total_osr_compile_count =
724 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
725 PerfData::U_Events, CHECK);
726
727 _perf_total_standard_compile_count =
728 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
729 PerfData::U_Events, CHECK);
730
731 _perf_sum_osr_bytes_compiled =
732 PerfDataManager::create_counter(SUN_CI, "osrBytes",
733 PerfData::U_Bytes, CHECK);
734
735 _perf_sum_standard_bytes_compiled =
736 PerfDataManager::create_counter(SUN_CI, "standardBytes",
737 PerfData::U_Bytes, CHECK);
738
739 _perf_sum_nmethod_size =
740 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
741 PerfData::U_Bytes, CHECK);
742
743 _perf_sum_nmethod_code_size =
744 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
745 PerfData::U_Bytes, CHECK);
746
747 _perf_last_method =
748 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
749 CompilerCounters::cmname_buffer_length,
750 "", CHECK);
751
752 _perf_last_failed_method =
753 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
754 CompilerCounters::cmname_buffer_length,
755 "", CHECK);
756
757 _perf_last_invalidated_method =
758 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
759 CompilerCounters::cmname_buffer_length,
760 "", CHECK);
761
762 _perf_last_compile_type =
763 PerfDataManager::create_variable(SUN_CI, "lastType",
764 PerfData::U_None,
765 (jlong)CompileBroker::no_compile,
766 CHECK);
767
768 _perf_last_compile_size =
769 PerfDataManager::create_variable(SUN_CI, "lastSize",
770 PerfData::U_Bytes,
771 (jlong)CompileBroker::no_compile,
772 CHECK);
773
774
775 _perf_last_failed_type =
776 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
777 PerfData::U_None,
778 (jlong)CompileBroker::no_compile,
779 CHECK);
780
781 _perf_last_invalidated_type =
782 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
783 PerfData::U_None,
784 (jlong)CompileBroker::no_compile,
785 CHECK);
786 }
787 }
788
789 // Completes compiler initialization. Compilation requests submitted
790 // prior to this will be silently ignored.
compilation_init_phase2()791 void CompileBroker::compilation_init_phase2() {
792 _initialized = true;
793 }
794
create_thread_oop(const char * name,TRAPS)795 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) {
796 Handle string = java_lang_String::create_from_str(name, CHECK_NH);
797 Handle thread_group(THREAD, Universe::system_thread_group());
798 return JavaCalls::construct_new_instance(
799 SystemDictionary::Thread_klass(),
800 vmSymbols::threadgroup_string_void_signature(),
801 thread_group,
802 string,
803 CHECK_NH);
804 }
805
806
make_thread(jobject thread_handle,CompileQueue * queue,AbstractCompiler * comp,Thread * THREAD)807 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, Thread* THREAD) {
808 JavaThread* new_thread = NULL;
809 {
810 MutexLocker mu(THREAD, Threads_lock);
811 if (comp != NULL) {
812 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) {
813 CompilerCounters* counters = new CompilerCounters();
814 new_thread = new CompilerThread(queue, counters);
815 }
816 } else {
817 new_thread = new CodeCacheSweeperThread();
818 }
819 // At this point the new CompilerThread data-races with this startup
820 // thread (which I believe is the primoridal thread and NOT the VM
821 // thread). This means Java bytecodes being executed at startup can
822 // queue compile jobs which will run at whatever default priority the
823 // newly created CompilerThread runs at.
824
825
826 // At this point it may be possible that no osthread was created for the
827 // JavaThread due to lack of memory. We would have to throw an exception
828 // in that case. However, since this must work and we do not allow
829 // exceptions anyway, check and abort if this fails. But first release the
830 // lock.
831
832 if (new_thread != NULL && new_thread->osthread() != NULL) {
833
834 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), new_thread);
835
836 // Note that this only sets the JavaThread _priority field, which by
837 // definition is limited to Java priorities and not OS priorities.
838 // The os-priority is set in the CompilerThread startup code itself
839
840 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority);
841
842 // Note that we cannot call os::set_priority because it expects Java
843 // priorities and we are *explicitly* using OS priorities so that it's
844 // possible to set the compiler thread priority higher than any Java
845 // thread.
846
847 int native_prio = CompilerThreadPriority;
848 if (native_prio == -1) {
849 if (UseCriticalCompilerThreadPriority) {
850 native_prio = os::java_to_os_priority[CriticalPriority];
851 } else {
852 native_prio = os::java_to_os_priority[NearMaxPriority];
853 }
854 }
855 os::set_native_priority(new_thread, native_prio);
856
857 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle));
858
859 new_thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle));
860 if (comp != NULL) {
861 new_thread->as_CompilerThread()->set_compiler(comp);
862 }
863 Threads::add(new_thread);
864 Thread::start(new_thread);
865 }
866 }
867
868 // First release lock before aborting VM.
869 if (new_thread == NULL || new_thread->osthread() == NULL) {
870 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) {
871 if (new_thread != NULL) {
872 new_thread->smr_delete();
873 }
874 return NULL;
875 }
876 vm_exit_during_initialization("java.lang.OutOfMemoryError",
877 os::native_thread_creation_failed_msg());
878 }
879
880 // Let go of Threads_lock before yielding
881 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
882
883 return new_thread;
884 }
885
886
init_compiler_sweeper_threads()887 void CompileBroker::init_compiler_sweeper_threads() {
888 NMethodSweeper::set_sweep_threshold_bytes(static_cast<size_t>(SweeperThreshold * ReservedCodeCacheSize / 100.0));
889 log_info(codecache, sweep)("Sweeper threshold: " SIZE_FORMAT " bytes", NMethodSweeper::sweep_threshold_bytes());
890
891 // Ensure any exceptions lead to vm_exit_during_initialization.
892 EXCEPTION_MARK;
893 #if !defined(ZERO)
894 assert(_c2_count > 0 || _c1_count > 0, "No compilers?");
895 #endif // !ZERO
896 // Initialize the compilation queue
897 if (_c2_count > 0) {
898 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue";
899 _c2_compile_queue = new CompileQueue(name);
900 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler);
901 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler);
902 }
903 if (_c1_count > 0) {
904 _c1_compile_queue = new CompileQueue("C1 compile queue");
905 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler);
906 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler);
907 }
908
909 char name_buffer[256];
910
911 for (int i = 0; i < _c2_count; i++) {
912 jobject thread_handle = NULL;
913 // Create all j.l.Thread objects for C1 and C2 threads here, but only one
914 // for JVMCI compiler which can create further ones on demand.
915 JVMCI_ONLY(if (!UseJVMCICompiler || !UseDynamicNumberOfCompilerThreads || i == 0) {)
916 // Create a name for our thread.
917 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
918 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
919 thread_handle = JNIHandles::make_global(thread_oop);
920 JVMCI_ONLY(})
921 _compiler2_objects[i] = thread_handle;
922 _compiler2_logs[i] = NULL;
923
924 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
925 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], THREAD);
926 assert(ct != NULL, "should have been handled for initial thread");
927 _compilers[1]->set_num_compiler_threads(i + 1);
928 if (TraceCompilerThreads) {
929 ResourceMark rm;
930 MutexLocker mu(Threads_lock);
931 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
932 }
933 }
934 }
935
936 for (int i = 0; i < _c1_count; i++) {
937 // Create a name for our thread.
938 sprintf(name_buffer, "C1 CompilerThread%d", i);
939 Handle thread_oop = create_thread_oop(name_buffer, CHECK);
940 jobject thread_handle = JNIHandles::make_global(thread_oop);
941 _compiler1_objects[i] = thread_handle;
942 _compiler1_logs[i] = NULL;
943
944 if (!UseDynamicNumberOfCompilerThreads || i == 0) {
945 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], THREAD);
946 assert(ct != NULL, "should have been handled for initial thread");
947 _compilers[0]->set_num_compiler_threads(i + 1);
948 if (TraceCompilerThreads) {
949 ResourceMark rm;
950 MutexLocker mu(Threads_lock);
951 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name());
952 }
953 }
954 }
955
956 if (UsePerfData) {
957 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK);
958 }
959
960 if (MethodFlushing) {
961 // Initialize the sweeper thread
962 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK);
963 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop());
964 make_thread(thread_handle, NULL, NULL, THREAD);
965 }
966 }
967
968 void CompileBroker::possibly_add_compiler_threads(Thread* THREAD) {
969
970 julong available_memory = os::available_memory();
971 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All).
972 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled),
973 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled);
974
975 // Only do attempt to start additional threads if the lock is free.
976 if (!CompileThread_lock->try_lock()) return;
977
978 if (_c2_compile_queue != NULL) {
979 int old_c2_count = _compilers[1]->num_compiler_threads();
980 int new_c2_count = MIN4(_c2_count,
981 _c2_compile_queue->size() / 2,
982 (int)(available_memory / (200*M)),
983 (int)(available_cc_np / (128*K)));
984
985 for (int i = old_c2_count; i < new_c2_count; i++) {
986 #if INCLUDE_JVMCI
987 if (UseJVMCICompiler) {
988 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread
989 // objects as their existence is completely hidden from the rest of
990 // the VM (and those compiler threads can't call Java code to do the
991 // creation anyway). For JVMCI we have to create new j.l.Thread objects
992 // as they are visible and we can see unexpected thread lifecycle
993 // transitions if we bind them to new JavaThreads.
994 if (!THREAD->can_call_java()) break;
995 char name_buffer[256];
996 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i);
997 Handle thread_oop;
998 {
999 // We have to give up the lock temporarily for the Java calls.
1000 MutexUnlocker mu(CompileThread_lock);
1001 thread_oop = create_thread_oop(name_buffer, THREAD);
1002 }
1003 if (HAS_PENDING_EXCEPTION) {
1004 if (TraceCompilerThreads) {
1005 ResourceMark rm;
1006 tty->print_cr("JVMCI compiler thread creation failed:");
1007 PENDING_EXCEPTION->print();
1008 }
1009 CLEAR_PENDING_EXCEPTION;
1010 break;
1011 }
1012 // Check if another thread has beaten us during the Java calls.
1013 if (_compilers[1]->num_compiler_threads() != i) break;
1014 jobject thread_handle = JNIHandles::make_global(thread_oop);
1015 assert(compiler2_object(i) == NULL, "Old one must be released!");
1016 _compiler2_objects[i] = thread_handle;
1017 }
1018 #endif
1019 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], THREAD);
1020 if (ct == NULL) break;
1021 _compilers[1]->set_num_compiler_threads(i + 1);
1022 if (TraceCompilerThreads) {
1023 ResourceMark rm;
1024 MutexLocker mu(Threads_lock);
1025 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)",
1026 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M));
1027 }
1028 }
1029 }
1030
1031 if (_c1_compile_queue != NULL) {
1032 int old_c1_count = _compilers[0]->num_compiler_threads();
1033 int new_c1_count = MIN4(_c1_count,
1034 _c1_compile_queue->size() / 4,
1035 (int)(available_memory / (100*M)),
1036 (int)(available_cc_p / (128*K)));
1037
1038 for (int i = old_c1_count; i < new_c1_count; i++) {
1039 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], THREAD);
1040 if (ct == NULL) break;
1041 _compilers[0]->set_num_compiler_threads(i + 1);
1042 if (TraceCompilerThreads) {
1043 ResourceMark rm;
1044 MutexLocker mu(Threads_lock);
1045 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)",
1046 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M));
1047 }
1048 }
1049 }
1050
1051 CompileThread_lock->unlock();
1052 }
1053
1054
1055 /**
1056 * Set the methods on the stack as on_stack so that redefine classes doesn't
1057 * reclaim them. This method is executed at a safepoint.
1058 */
1059 void CompileBroker::mark_on_stack() {
1060 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1061 // Since we are at a safepoint, we do not need a lock to access
1062 // the compile queues.
1063 if (_c2_compile_queue != NULL) {
1064 _c2_compile_queue->mark_on_stack();
1065 }
1066 if (_c1_compile_queue != NULL) {
1067 _c1_compile_queue->mark_on_stack();
1068 }
1069 }
1070
1071 // ------------------------------------------------------------------
1072 // CompileBroker::compile_method
1073 //
1074 // Request compilation of a method.
1075 void CompileBroker::compile_method_base(const methodHandle& method,
1076 int osr_bci,
1077 int comp_level,
1078 const methodHandle& hot_method,
1079 int hot_count,
1080 CompileTask::CompileReason compile_reason,
1081 bool blocking,
1082 Thread* thread) {
1083 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1084 assert(method->method_holder()->is_instance_klass(),
1085 "sanity check");
1086 assert(!method->method_holder()->is_not_initialized(),
1087 "method holder must be initialized");
1088 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1089
1090 if (CIPrintRequests) {
1091 tty->print("request: ");
1092 method->print_short_name(tty);
1093 if (osr_bci != InvocationEntryBci) {
1094 tty->print(" osr_bci: %d", osr_bci);
1095 }
1096 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count);
1097 if (!hot_method.is_null()) {
1098 tty->print(" hot: ");
1099 if (hot_method() != method()) {
1100 hot_method->print_short_name(tty);
1101 } else {
1102 tty->print("yes");
1103 }
1104 }
1105 tty->cr();
1106 }
1107
1108 // A request has been made for compilation. Before we do any
1109 // real work, check to see if the method has been compiled
1110 // in the meantime with a definitive result.
1111 if (compilation_is_complete(method, osr_bci, comp_level)) {
1112 return;
1113 }
1114
1115 #ifndef PRODUCT
1116 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1117 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1118 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1119 return;
1120 }
1121 }
1122 #endif
1123
1124 // If this method is already in the compile queue, then
1125 // we do not block the current thread.
1126 if (compilation_is_in_queue(method)) {
1127 // We may want to decay our counter a bit here to prevent
1128 // multiple denied requests for compilation. This is an
1129 // open compilation policy issue. Note: The other possibility,
1130 // in the case that this is a blocking compile request, is to have
1131 // all subsequent blocking requesters wait for completion of
1132 // ongoing compiles. Note that in this case we'll need a protocol
1133 // for freeing the associated compile tasks. [Or we could have
1134 // a single static monitor on which all these waiters sleep.]
1135 return;
1136 }
1137
1138 if (TieredCompilation) {
1139 // Tiered policy requires MethodCounters to exist before adding a method to
1140 // the queue. Create if we don't have them yet.
1141 method->get_method_counters(thread);
1142 }
1143
1144 // Outputs from the following MutexLocker block:
1145 CompileTask* task = NULL;
1146 CompileQueue* queue = compile_queue(comp_level);
1147
1148 // Acquire our lock.
1149 {
1150 MutexLocker locker(thread, MethodCompileQueue_lock);
1151
1152 // Make sure the method has not slipped into the queues since
1153 // last we checked; note that those checks were "fast bail-outs".
1154 // Here we need to be more careful, see 14012000 below.
1155 if (compilation_is_in_queue(method)) {
1156 return;
1157 }
1158
1159 // We need to check again to see if the compilation has
1160 // completed. A previous compilation may have registered
1161 // some result.
1162 if (compilation_is_complete(method, osr_bci, comp_level)) {
1163 return;
1164 }
1165
1166 // We now know that this compilation is not pending, complete,
1167 // or prohibited. Assign a compile_id to this compilation
1168 // and check to see if it is in our [Start..Stop) range.
1169 int compile_id = assign_compile_id(method, osr_bci);
1170 if (compile_id == 0) {
1171 // The compilation falls outside the allowed range.
1172 return;
1173 }
1174
1175 #if INCLUDE_JVMCI
1176 if (UseJVMCICompiler && blocking) {
1177 // Don't allow blocking compiles for requests triggered by JVMCI.
1178 if (thread->is_Compiler_thread()) {
1179 blocking = false;
1180 }
1181
1182 if (!UseJVMCINativeLibrary) {
1183 // Don't allow blocking compiles if inside a class initializer or while performing class loading
1184 vframeStream vfst((JavaThread*) thread);
1185 for (; !vfst.at_end(); vfst.next()) {
1186 if (vfst.method()->is_static_initializer() ||
1187 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) &&
1188 vfst.method()->name() == vmSymbols::loadClass_name())) {
1189 blocking = false;
1190 break;
1191 }
1192 }
1193 }
1194
1195 // Don't allow blocking compilation requests to JVMCI
1196 // if JVMCI itself is not yet initialized
1197 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) {
1198 blocking = false;
1199 }
1200
1201 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown
1202 // to avoid deadlock between compiler thread(s) and threads run at shutdown
1203 // such as the DestroyJavaVM thread.
1204 if (JVMCI::shutdown_called()) {
1205 blocking = false;
1206 }
1207 }
1208 #endif // INCLUDE_JVMCI
1209
1210 // We will enter the compilation in the queue.
1211 // 14012000: Note that this sets the queued_for_compile bits in
1212 // the target method. We can now reason that a method cannot be
1213 // queued for compilation more than once, as follows:
1214 // Before a thread queues a task for compilation, it first acquires
1215 // the compile queue lock, then checks if the method's queued bits
1216 // are set or it has already been compiled. Thus there can not be two
1217 // instances of a compilation task for the same method on the
1218 // compilation queue. Consider now the case where the compilation
1219 // thread has already removed a task for that method from the queue
1220 // and is in the midst of compiling it. In this case, the
1221 // queued_for_compile bits must be set in the method (and these
1222 // will be visible to the current thread, since the bits were set
1223 // under protection of the compile queue lock, which we hold now.
1224 // When the compilation completes, the compiler thread first sets
1225 // the compilation result and then clears the queued_for_compile
1226 // bits. Neither of these actions are protected by a barrier (or done
1227 // under the protection of a lock), so the only guarantee we have
1228 // (on machines with TSO (Total Store Order)) is that these values
1229 // will update in that order. As a result, the only combinations of
1230 // these bits that the current thread will see are, in temporal order:
1231 // <RESULT, QUEUE> :
1232 // <0, 1> : in compile queue, but not yet compiled
1233 // <1, 1> : compiled but queue bit not cleared
1234 // <1, 0> : compiled and queue bit cleared
1235 // Because we first check the queue bits then check the result bits,
1236 // we are assured that we cannot introduce a duplicate task.
1237 // Note that if we did the tests in the reverse order (i.e. check
1238 // result then check queued bit), we could get the result bit before
1239 // the compilation completed, and the queue bit after the compilation
1240 // completed, and end up introducing a "duplicate" (redundant) task.
1241 // In that case, the compiler thread should first check if a method
1242 // has already been compiled before trying to compile it.
1243 // NOTE: in the event that there are multiple compiler threads and
1244 // there is de-optimization/recompilation, things will get hairy,
1245 // and in that case it's best to protect both the testing (here) of
1246 // these bits, and their updating (here and elsewhere) under a
1247 // common lock.
1248 task = create_compile_task(queue,
1249 compile_id, method,
1250 osr_bci, comp_level,
1251 hot_method, hot_count, compile_reason,
1252 blocking);
1253 }
1254
1255 if (blocking) {
1256 wait_for_completion(task);
1257 }
1258 }
1259
1260 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1261 int comp_level,
1262 const methodHandle& hot_method, int hot_count,
1263 CompileTask::CompileReason compile_reason,
1264 Thread* THREAD) {
1265 // Do nothing if compilebroker is not initalized or compiles are submitted on level none
1266 if (!_initialized || comp_level == CompLevel_none) {
1267 return NULL;
1268 }
1269
1270 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1271 assert(comp != NULL, "Ensure we have a compiler");
1272
1273 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp);
1274 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD);
1275 DirectivesStack::release(directive);
1276 return nm;
1277 }
1278
1279 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci,
1280 int comp_level,
1281 const methodHandle& hot_method, int hot_count,
1282 CompileTask::CompileReason compile_reason,
1283 DirectiveSet* directive,
1284 Thread* THREAD) {
1285
1286 // make sure arguments make sense
1287 assert(method->method_holder()->is_instance_klass(), "not an instance method");
1288 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1289 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1290 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1291 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level");
1292 // allow any levels for WhiteBox
1293 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1294 // return quickly if possible
1295
1296 // lock, make sure that the compilation
1297 // isn't prohibited in a straightforward way.
1298 AbstractCompiler* comp = CompileBroker::compiler(comp_level);
1299 if (comp == NULL || !comp->can_compile_method(method) ||
1300 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) {
1301 return NULL;
1302 }
1303
1304 #if INCLUDE_JVMCI
1305 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) {
1306 return NULL;
1307 }
1308 #endif
1309
1310 if (osr_bci == InvocationEntryBci) {
1311 // standard compilation
1312 CompiledMethod* method_code = method->code();
1313 if (method_code != NULL && method_code->is_nmethod()) {
1314 if (compilation_is_complete(method, osr_bci, comp_level)) {
1315 return (nmethod*) method_code;
1316 }
1317 }
1318 if (method->is_not_compilable(comp_level)) {
1319 return NULL;
1320 }
1321 } else {
1322 // osr compilation
1323 #ifndef TIERED
1324 // seems like an assert of dubious value
1325 assert(comp_level == CompLevel_highest_tier,
1326 "all OSR compiles are assumed to be at a single compilation level");
1327 #endif // TIERED
1328 // We accept a higher level osr method
1329 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1330 if (nm != NULL) return nm;
1331 if (method->is_not_osr_compilable(comp_level)) return NULL;
1332 }
1333
1334 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1335 // some prerequisites that are compiler specific
1336 if (comp->is_c2()) {
1337 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1338 // Resolve all classes seen in the signature of the method
1339 // we are compiling.
1340 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1341 }
1342
1343 // If the method is native, do the lookup in the thread requesting
1344 // the compilation. Native lookups can load code, which is not
1345 // permitted during compilation.
1346 //
1347 // Note: A native method implies non-osr compilation which is
1348 // checked with an assertion at the entry of this method.
1349 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1350 bool in_base_library;
1351 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1352 if (HAS_PENDING_EXCEPTION) {
1353 // In case of an exception looking up the method, we just forget
1354 // about it. The interpreter will kick-in and throw the exception.
1355 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable()
1356 CLEAR_PENDING_EXCEPTION;
1357 return NULL;
1358 }
1359 assert(method->has_native_function(), "must have native code by now");
1360 }
1361
1362 // RedefineClasses() has replaced this method; just return
1363 if (method->is_old()) {
1364 return NULL;
1365 }
1366
1367 // JVMTI -- post_compile_event requires jmethod_id() that may require
1368 // a lock the compiling thread can not acquire. Prefetch it here.
1369 if (JvmtiExport::should_post_compiled_method_load()) {
1370 method->jmethod_id();
1371 }
1372
1373 // do the compilation
1374 if (method->is_native()) {
1375 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1376 #if defined(X86) && !defined(ZERO)
1377 // The following native methods:
1378 //
1379 // java.lang.Float.intBitsToFloat
1380 // java.lang.Float.floatToRawIntBits
1381 // java.lang.Double.longBitsToDouble
1382 // java.lang.Double.doubleToRawLongBits
1383 //
1384 // are called through the interpreter even if interpreter native stubs
1385 // are not preferred (i.e., calling through adapter handlers is preferred).
1386 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved
1387 // if the version of the methods from the native libraries is called.
1388 // As the interpreter and the C2-intrinsified version of the methods preserves
1389 // sNaNs, that would result in an inconsistent way of handling of sNaNs.
1390 if ((UseSSE >= 1 &&
1391 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat ||
1392 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) ||
1393 (UseSSE >= 2 &&
1394 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble ||
1395 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) {
1396 return NULL;
1397 }
1398 #endif // X86 && !ZERO
1399
1400 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1401 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1402 //
1403 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1404 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1405 AdapterHandlerLibrary::create_native_wrapper(method);
1406 } else {
1407 return NULL;
1408 }
1409 } else {
1410 // If the compiler is shut off due to code cache getting full
1411 // fail out now so blocking compiles dont hang the java thread
1412 if (!should_compile_new_jobs()) {
1413 CompilationPolicy::policy()->delay_compilation(method());
1414 return NULL;
1415 }
1416 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles;
1417 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD);
1418 }
1419
1420 // return requested nmethod
1421 // We accept a higher level osr method
1422 if (osr_bci == InvocationEntryBci) {
1423 CompiledMethod* code = method->code();
1424 if (code == NULL) {
1425 return (nmethod*) code;
1426 } else {
1427 return code->as_nmethod_or_null();
1428 }
1429 }
1430 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1431 }
1432
1433
1434 // ------------------------------------------------------------------
1435 // CompileBroker::compilation_is_complete
1436 //
1437 // See if compilation of this method is already complete.
1438 bool CompileBroker::compilation_is_complete(const methodHandle& method,
1439 int osr_bci,
1440 int comp_level) {
1441 bool is_osr = (osr_bci != standard_entry_bci);
1442 if (is_osr) {
1443 if (method->is_not_osr_compilable(comp_level)) {
1444 return true;
1445 } else {
1446 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1447 return (result != NULL);
1448 }
1449 } else {
1450 if (method->is_not_compilable(comp_level)) {
1451 return true;
1452 } else {
1453 CompiledMethod* result = method->code();
1454 if (result == NULL) return false;
1455 return comp_level == result->comp_level();
1456 }
1457 }
1458 }
1459
1460
1461 /**
1462 * See if this compilation is already requested.
1463 *
1464 * Implementation note: there is only a single "is in queue" bit
1465 * for each method. This means that the check below is overly
1466 * conservative in the sense that an osr compilation in the queue
1467 * will block a normal compilation from entering the queue (and vice
1468 * versa). This can be remedied by a full queue search to disambiguate
1469 * cases. If it is deemed profitable, this may be done.
1470 */
1471 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) {
1472 return method->queued_for_compilation();
1473 }
1474
1475 // ------------------------------------------------------------------
1476 // CompileBroker::compilation_is_prohibited
1477 //
1478 // See if this compilation is not allowed.
1479 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) {
1480 bool is_native = method->is_native();
1481 // Some compilers may not support the compilation of natives.
1482 AbstractCompiler *comp = compiler(comp_level);
1483 if (is_native &&
1484 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1485 method->set_not_compilable_quietly("native methods not supported", comp_level);
1486 return true;
1487 }
1488
1489 bool is_osr = (osr_bci != standard_entry_bci);
1490 // Some compilers may not support on stack replacement.
1491 if (is_osr &&
1492 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1493 method->set_not_osr_compilable("OSR not supported", comp_level);
1494 return true;
1495 }
1496
1497 // The method may be explicitly excluded by the user.
1498 double scale;
1499 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) {
1500 bool quietly = CompilerOracle::should_exclude_quietly();
1501 if (PrintCompilation && !quietly) {
1502 // This does not happen quietly...
1503 ResourceMark rm;
1504 tty->print("### Excluding %s:%s",
1505 method->is_native() ? "generation of native wrapper" : "compile",
1506 (method->is_static() ? " static" : ""));
1507 method->print_short_name(tty);
1508 tty->cr();
1509 }
1510 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly);
1511 }
1512
1513 return false;
1514 }
1515
1516 /**
1517 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1518 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1519 * The function also allows to generate separate compilation IDs for OSR compilations.
1520 */
1521 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) {
1522 #ifdef ASSERT
1523 bool is_osr = (osr_bci != standard_entry_bci);
1524 int id;
1525 if (method->is_native()) {
1526 assert(!is_osr, "can't be osr");
1527 // Adapters, native wrappers and method handle intrinsics
1528 // should be generated always.
1529 return Atomic::add(&_compilation_id, 1);
1530 } else if (CICountOSR && is_osr) {
1531 id = Atomic::add(&_osr_compilation_id, 1);
1532 if (CIStartOSR <= id && id < CIStopOSR) {
1533 return id;
1534 }
1535 } else {
1536 id = Atomic::add(&_compilation_id, 1);
1537 if (CIStart <= id && id < CIStop) {
1538 return id;
1539 }
1540 }
1541
1542 // Method was not in the appropriate compilation range.
1543 method->set_not_compilable_quietly("Not in requested compile id range");
1544 return 0;
1545 #else
1546 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1547 // only _compilation_id is incremented.
1548 return Atomic::add(&_compilation_id, 1);
1549 #endif
1550 }
1551
1552 // ------------------------------------------------------------------
1553 // CompileBroker::assign_compile_id_unlocked
1554 //
1555 // Public wrapper for assign_compile_id that acquires the needed locks
1556 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) {
1557 MutexLocker locker(thread, MethodCompileQueue_lock);
1558 return assign_compile_id(method, osr_bci);
1559 }
1560
1561 // ------------------------------------------------------------------
1562 // CompileBroker::create_compile_task
1563 //
1564 // Create a CompileTask object representing the current request for
1565 // compilation. Add this task to the queue.
1566 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1567 int compile_id,
1568 const methodHandle& method,
1569 int osr_bci,
1570 int comp_level,
1571 const methodHandle& hot_method,
1572 int hot_count,
1573 CompileTask::CompileReason compile_reason,
1574 bool blocking) {
1575 CompileTask* new_task = CompileTask::allocate();
1576 new_task->initialize(compile_id, method, osr_bci, comp_level,
1577 hot_method, hot_count, compile_reason,
1578 blocking);
1579 queue->add(new_task);
1580 return new_task;
1581 }
1582
1583 #if INCLUDE_JVMCI
1584 // The number of milliseconds to wait before checking if
1585 // JVMCI compilation has made progress.
1586 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000;
1587
1588 // The number of JVMCI compilation progress checks that must fail
1589 // before unblocking a thread waiting for a blocking compilation.
1590 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10;
1591
1592 /**
1593 * Waits for a JVMCI compiler to complete a given task. This thread
1594 * waits until either the task completes or it sees no JVMCI compilation
1595 * progress for N consecutive milliseconds where N is
1596 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE *
1597 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS.
1598 *
1599 * @return true if this thread needs to free/recycle the task
1600 */
1601 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) {
1602 MonitorLocker ml(thread, task->lock());
1603 int progress_wait_attempts = 0;
1604 int methods_compiled = jvmci->methods_compiled();
1605 while (!task->is_complete() && !is_compilation_disabled_forever() &&
1606 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) {
1607 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread();
1608
1609 bool progress;
1610 if (jvmci_compiler_thread != NULL) {
1611 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress.
1612 progress = jvmci_compiler_thread->thread_state() != _thread_blocked &&
1613 !jvmci_compiler_thread->is_external_suspend();
1614 } else {
1615 // Still waiting on JVMCI compiler queue. This thread may be holding a lock
1616 // that all JVMCI compiler threads are blocked on. We use the counter for
1617 // successful JVMCI compilations to determine whether JVMCI compilation
1618 // is still making progress through the JVMCI compiler queue.
1619 progress = jvmci->methods_compiled() != methods_compiled;
1620 }
1621
1622 if (!progress) {
1623 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) {
1624 if (PrintCompilation) {
1625 task->print(tty, "wait for blocking compilation timed out");
1626 }
1627 break;
1628 }
1629 } else {
1630 progress_wait_attempts = 0;
1631 if (jvmci_compiler_thread == NULL) {
1632 methods_compiled = jvmci->methods_compiled();
1633 }
1634 }
1635 }
1636 task->clear_waiter();
1637 return task->is_complete();
1638 }
1639 #endif
1640
1641 /**
1642 * Wait for the compilation task to complete.
1643 */
1644 void CompileBroker::wait_for_completion(CompileTask* task) {
1645 if (CIPrintCompileQueue) {
1646 ttyLocker ttyl;
1647 tty->print_cr("BLOCKING FOR COMPILE");
1648 }
1649
1650 assert(task->is_blocking(), "can only wait on blocking task");
1651
1652 JavaThread* thread = JavaThread::current();
1653
1654 methodHandle method(thread, task->method());
1655 bool free_task;
1656 #if INCLUDE_JVMCI
1657 AbstractCompiler* comp = compiler(task->comp_level());
1658 if (comp->is_jvmci() && !task->should_wait_for_compilation()) {
1659 // It may return before compilation is completed.
1660 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
1661 } else
1662 #endif
1663 {
1664 MonitorLocker ml(thread, task->lock());
1665 free_task = true;
1666 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1667 ml.wait();
1668 }
1669 }
1670
1671 if (free_task) {
1672 if (is_compilation_disabled_forever()) {
1673 CompileTask::free(task);
1674 return;
1675 }
1676
1677 // It is harmless to check this status without the lock, because
1678 // completion is a stable property (until the task object is recycled).
1679 assert(task->is_complete(), "Compilation should have completed");
1680 assert(task->code_handle() == NULL, "must be reset");
1681
1682 // By convention, the waiter is responsible for recycling a
1683 // blocking CompileTask. Since there is only one waiter ever
1684 // waiting on a CompileTask, we know that no one else will
1685 // be using this CompileTask; we can free it.
1686 CompileTask::free(task);
1687 }
1688 }
1689
1690 /**
1691 * Initialize compiler thread(s) + compiler object(s). The postcondition
1692 * of this function is that the compiler runtimes are initialized and that
1693 * compiler threads can start compiling.
1694 */
1695 bool CompileBroker::init_compiler_runtime() {
1696 CompilerThread* thread = CompilerThread::current();
1697 AbstractCompiler* comp = thread->compiler();
1698 // Final sanity check - the compiler object must exist
1699 guarantee(comp != NULL, "Compiler object must exist");
1700
1701 {
1702 // Must switch to native to allocate ci_env
1703 ThreadToNativeFromVM ttn(thread);
1704 ciEnv ci_env((CompileTask*)NULL);
1705 // Cache Jvmti state
1706 ci_env.cache_jvmti_state();
1707 // Cache DTrace flags
1708 ci_env.cache_dtrace_flags();
1709
1710 // Switch back to VM state to do compiler initialization
1711 ThreadInVMfromNative tv(thread);
1712 ResetNoHandleMark rnhm;
1713
1714 // Perform per-thread and global initializations
1715 comp->initialize();
1716 }
1717
1718 if (comp->is_failed()) {
1719 disable_compilation_forever();
1720 // If compiler initialization failed, no compiler thread that is specific to a
1721 // particular compiler runtime will ever start to compile methods.
1722 shutdown_compiler_runtime(comp, thread);
1723 return false;
1724 }
1725
1726 // C1 specific check
1727 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1728 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1729 return false;
1730 }
1731
1732 return true;
1733 }
1734
1735 /**
1736 * If C1 and/or C2 initialization failed, we shut down all compilation.
1737 * We do this to keep things simple. This can be changed if it ever turns
1738 * out to be a problem.
1739 */
1740 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1741 // Free buffer blob, if allocated
1742 if (thread->get_buffer_blob() != NULL) {
1743 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1744 CodeCache::free(thread->get_buffer_blob());
1745 }
1746
1747 if (comp->should_perform_shutdown()) {
1748 // There are two reasons for shutting down the compiler
1749 // 1) compiler runtime initialization failed
1750 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1751 warning("%s initialization failed. Shutting down all compilers", comp->name());
1752
1753 // Only one thread per compiler runtime object enters here
1754 // Set state to shut down
1755 comp->set_shut_down();
1756
1757 // Delete all queued compilation tasks to make compiler threads exit faster.
1758 if (_c1_compile_queue != NULL) {
1759 _c1_compile_queue->free_all();
1760 }
1761
1762 if (_c2_compile_queue != NULL) {
1763 _c2_compile_queue->free_all();
1764 }
1765
1766 // Set flags so that we continue execution with using interpreter only.
1767 UseCompiler = false;
1768 UseInterpreter = true;
1769
1770 // We could delete compiler runtimes also. However, there are references to
1771 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1772 // fail. This can be done later if necessary.
1773 }
1774 }
1775
1776 /**
1777 * Helper function to create new or reuse old CompileLog.
1778 */
1779 CompileLog* CompileBroker::get_log(CompilerThread* ct) {
1780 if (!LogCompilation) return NULL;
1781
1782 AbstractCompiler *compiler = ct->compiler();
1783 bool c1 = compiler->is_c1();
1784 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects;
1785 assert(compiler_objects != NULL, "must be initialized at this point");
1786 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs;
1787 assert(logs != NULL, "must be initialized at this point");
1788 int count = c1 ? _c1_count : _c2_count;
1789
1790 // Find Compiler number by its threadObj.
1791 oop compiler_obj = ct->threadObj();
1792 int compiler_number = 0;
1793 bool found = false;
1794 for (; compiler_number < count; compiler_number++) {
1795 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) {
1796 found = true;
1797 break;
1798 }
1799 }
1800 assert(found, "Compiler must exist at this point");
1801
1802 // Determine pointer for this thread's log.
1803 CompileLog** log_ptr = &logs[compiler_number];
1804
1805 // Return old one if it exists.
1806 CompileLog* log = *log_ptr;
1807 if (log != NULL) {
1808 ct->init_log(log);
1809 return log;
1810 }
1811
1812 // Create a new one and remember it.
1813 init_compiler_thread_log();
1814 log = ct->log();
1815 *log_ptr = log;
1816 return log;
1817 }
1818
1819 // ------------------------------------------------------------------
1820 // CompileBroker::compiler_thread_loop
1821 //
1822 // The main loop run by a CompilerThread.
1823 void CompileBroker::compiler_thread_loop() {
1824 CompilerThread* thread = CompilerThread::current();
1825 CompileQueue* queue = thread->queue();
1826 // For the thread that initializes the ciObjectFactory
1827 // this resource mark holds all the shared objects
1828 ResourceMark rm;
1829
1830 // First thread to get here will initialize the compiler interface
1831
1832 {
1833 ASSERT_IN_VM;
1834 MutexLocker only_one (thread, CompileThread_lock);
1835 if (!ciObjectFactory::is_initialized()) {
1836 ciObjectFactory::initialize();
1837 }
1838 }
1839
1840 // Open a log.
1841 CompileLog* log = get_log(thread);
1842 if (log != NULL) {
1843 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1844 thread->name(),
1845 os::current_thread_id(),
1846 os::current_process_id());
1847 log->stamp();
1848 log->end_elem();
1849 }
1850
1851 // If compiler thread/runtime initialization fails, exit the compiler thread
1852 if (!init_compiler_runtime()) {
1853 return;
1854 }
1855
1856 thread->start_idle_timer();
1857
1858 // Poll for new compilation tasks as long as the JVM runs. Compilation
1859 // should only be disabled if something went wrong while initializing the
1860 // compiler runtimes. This, in turn, should not happen. The only known case
1861 // when compiler runtime initialization fails is if there is not enough free
1862 // space in the code cache to generate the necessary stubs, etc.
1863 while (!is_compilation_disabled_forever()) {
1864 // We need this HandleMark to avoid leaking VM handles.
1865 HandleMark hm(thread);
1866
1867 CompileTask* task = queue->get();
1868 if (task == NULL) {
1869 if (UseDynamicNumberOfCompilerThreads) {
1870 // Access compiler_count under lock to enforce consistency.
1871 MutexLocker only_one(CompileThread_lock);
1872 if (can_remove(thread, true)) {
1873 if (TraceCompilerThreads) {
1874 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time",
1875 thread->name(), thread->idle_time_millis());
1876 }
1877 // Free buffer blob, if allocated
1878 if (thread->get_buffer_blob() != NULL) {
1879 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1880 CodeCache::free(thread->get_buffer_blob());
1881 }
1882 return; // Stop this thread.
1883 }
1884 }
1885 } else {
1886 // Assign the task to the current thread. Mark this compilation
1887 // thread as active for the profiler.
1888 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition
1889 // occurs after fetching the compile task off the queue.
1890 CompileTaskWrapper ctw(task);
1891 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1892 task->set_code_handle(&result_handle);
1893 methodHandle method(thread, task->method());
1894
1895 // Never compile a method if breakpoints are present in it
1896 if (method()->number_of_breakpoints() == 0) {
1897 // Compile the method.
1898 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1899 invoke_compiler_on_method(task);
1900 thread->start_idle_timer();
1901 } else {
1902 // After compilation is disabled, remove remaining methods from queue
1903 method->clear_queued_for_compilation();
1904 task->set_failure_reason("compilation is disabled");
1905 }
1906 }
1907
1908 if (UseDynamicNumberOfCompilerThreads) {
1909 possibly_add_compiler_threads(thread);
1910 assert(!thread->has_pending_exception(), "should have been handled");
1911 }
1912 }
1913 }
1914
1915 // Shut down compiler runtime
1916 shutdown_compiler_runtime(thread->compiler(), thread);
1917 }
1918
1919 // ------------------------------------------------------------------
1920 // CompileBroker::init_compiler_thread_log
1921 //
1922 // Set up state required by +LogCompilation.
1923 void CompileBroker::init_compiler_thread_log() {
1924 CompilerThread* thread = CompilerThread::current();
1925 char file_name[4*K];
1926 FILE* fp = NULL;
1927 intx thread_id = os::current_thread_id();
1928 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1929 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1930 if (dir == NULL) {
1931 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1932 thread_id, os::current_process_id());
1933 } else {
1934 jio_snprintf(file_name, sizeof(file_name),
1935 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1936 os::file_separator(), thread_id, os::current_process_id());
1937 }
1938
1939 fp = fopen(file_name, "wt");
1940 if (fp != NULL) {
1941 if (LogCompilation && Verbose) {
1942 tty->print_cr("Opening compilation log %s", file_name);
1943 }
1944 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1945 if (log == NULL) {
1946 fclose(fp);
1947 return;
1948 }
1949 thread->init_log(log);
1950
1951 if (xtty != NULL) {
1952 ttyLocker ttyl;
1953 // Record any per thread log files
1954 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1955 }
1956 return;
1957 }
1958 }
1959 warning("Cannot open log file: %s", file_name);
1960 }
1961
1962 void CompileBroker::log_metaspace_failure() {
1963 const char* message = "some methods may not be compiled because metaspace "
1964 "is out of memory";
1965 if (_compilation_log != NULL) {
1966 _compilation_log->log_metaspace_failure(message);
1967 }
1968 if (PrintCompilation) {
1969 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message);
1970 }
1971 }
1972
1973
1974 // ------------------------------------------------------------------
1975 // CompileBroker::set_should_block
1976 //
1977 // Set _should_block.
1978 // Call this from the VM, with Threads_lock held and a safepoint requested.
1979 void CompileBroker::set_should_block() {
1980 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1981 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1982 #ifndef PRODUCT
1983 if (PrintCompilation && (Verbose || WizardMode))
1984 tty->print_cr("notifying compiler thread pool to block");
1985 #endif
1986 _should_block = true;
1987 }
1988
1989 // ------------------------------------------------------------------
1990 // CompileBroker::maybe_block
1991 //
1992 // Call this from the compiler at convenient points, to poll for _should_block.
1993 void CompileBroker::maybe_block() {
1994 if (_should_block) {
1995 #ifndef PRODUCT
1996 if (PrintCompilation && (Verbose || WizardMode))
1997 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1998 #endif
1999 ThreadInVMfromNative tivfn(JavaThread::current());
2000 }
2001 }
2002
2003 // wrapper for CodeCache::print_summary()
2004 static void codecache_print(bool detailed)
2005 {
2006 ResourceMark rm;
2007 stringStream s;
2008 // Dump code cache into a buffer before locking the tty,
2009 {
2010 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2011 CodeCache::print_summary(&s, detailed);
2012 }
2013 ttyLocker ttyl;
2014 tty->print("%s", s.as_string());
2015 }
2016
2017 // wrapper for CodeCache::print_summary() using outputStream
2018 static void codecache_print(outputStream* out, bool detailed) {
2019 ResourceMark rm;
2020 stringStream s;
2021
2022 // Dump code cache into a buffer
2023 {
2024 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
2025 CodeCache::print_summary(&s, detailed);
2026 }
2027
2028 char* remaining_log = s.as_string();
2029 while (*remaining_log != '\0') {
2030 char* eol = strchr(remaining_log, '\n');
2031 if (eol == NULL) {
2032 out->print_cr("%s", remaining_log);
2033 remaining_log = remaining_log + strlen(remaining_log);
2034 } else {
2035 *eol = '\0';
2036 out->print_cr("%s", remaining_log);
2037 remaining_log = eol + 1;
2038 }
2039 }
2040 }
2041
2042 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env,
2043 int compilable, const char* failure_reason) {
2044 if (success) {
2045 task->mark_success();
2046 if (ci_env != NULL) {
2047 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes());
2048 }
2049 if (_compilation_log != NULL) {
2050 nmethod* code = task->code();
2051 if (code != NULL) {
2052 _compilation_log->log_nmethod(thread, code);
2053 }
2054 }
2055 } else if (AbortVMOnCompilationFailure) {
2056 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
2057 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason);
2058 }
2059 if (compilable == ciEnv::MethodCompilable_never) {
2060 fatal("Never compilable: %s", failure_reason);
2061 }
2062 }
2063 // simulate crash during compilation
2064 assert(task->compile_id() != CICrashAt, "just as planned");
2065 }
2066
2067 static void post_compilation_event(EventCompilation& event, CompileTask* task) {
2068 assert(task != NULL, "invariant");
2069 CompilerEvent::CompilationEvent::post(event,
2070 task->compile_id(),
2071 task->compiler()->type(),
2072 task->method(),
2073 task->comp_level(),
2074 task->is_success(),
2075 task->osr_bci() != CompileBroker::standard_entry_bci,
2076 (task->code() == NULL) ? 0 : task->code()->total_size(),
2077 task->num_inlined_bytecodes());
2078 }
2079
2080 int DirectivesStack::_depth = 0;
2081 CompilerDirectives* DirectivesStack::_top = NULL;
2082 CompilerDirectives* DirectivesStack::_bottom = NULL;
2083
2084 // ------------------------------------------------------------------
2085 // CompileBroker::invoke_compiler_on_method
2086 //
2087 // Compile a method.
2088 //
2089 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
2090 task->print_ul();
2091 if (PrintCompilation) {
2092 ResourceMark rm;
2093 task->print_tty();
2094 }
2095 elapsedTimer time;
2096
2097 CompilerThread* thread = CompilerThread::current();
2098 ResourceMark rm(thread);
2099
2100 if (LogEvents) {
2101 _compilation_log->log_compile(thread, task);
2102 }
2103
2104 // Common flags.
2105 uint compile_id = task->compile_id();
2106 int osr_bci = task->osr_bci();
2107 bool is_osr = (osr_bci != standard_entry_bci);
2108 bool should_log = (thread->log() != NULL);
2109 bool should_break = false;
2110 const int task_level = task->comp_level();
2111 AbstractCompiler* comp = task->compiler();
2112
2113 DirectiveSet* directive;
2114 {
2115 // create the handle inside it's own block so it can't
2116 // accidentally be referenced once the thread transitions to
2117 // native. The NoHandleMark before the transition should catch
2118 // any cases where this occurs in the future.
2119 methodHandle method(thread, task->method());
2120 assert(!method->is_native(), "no longer compile natives");
2121
2122 // Look up matching directives
2123 directive = DirectivesStack::getMatchingDirective(method, comp);
2124
2125 // Update compile information when using perfdata.
2126 if (UsePerfData) {
2127 update_compile_perf_data(thread, method, is_osr);
2128 }
2129
2130 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
2131 }
2132
2133 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags();
2134 if (should_log && !directive->LogOption) {
2135 should_log = false;
2136 }
2137
2138 // Allocate a new set of JNI handles.
2139 push_jni_handle_block();
2140 Method* target_handle = task->method();
2141 int compilable = ciEnv::MethodCompilable;
2142 const char* failure_reason = NULL;
2143 bool failure_reason_on_C_heap = false;
2144 const char* retry_message = NULL;
2145
2146 #if INCLUDE_JVMCI
2147 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) {
2148 JVMCICompiler* jvmci = (JVMCICompiler*) comp;
2149
2150 TraceTime t1("compilation", &time);
2151 EventCompilation event;
2152 JVMCICompileState compile_state(task);
2153
2154 // Skip redefined methods
2155 if (compile_state.target_method_is_old()) {
2156 failure_reason = "redefined method";
2157 retry_message = "not retryable";
2158 compilable = ciEnv::MethodCompilable_never;
2159 } else {
2160 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__);
2161 methodHandle method(thread, target_handle);
2162 env.runtime()->compile_method(&env, jvmci, method, osr_bci);
2163
2164 failure_reason = compile_state.failure_reason();
2165 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap();
2166 if (!compile_state.retryable()) {
2167 retry_message = "not retryable";
2168 compilable = ciEnv::MethodCompilable_not_at_tier;
2169 }
2170 if (task->code() == NULL) {
2171 assert(failure_reason != NULL, "must specify failure_reason");
2172 }
2173 }
2174 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason);
2175 if (event.should_commit()) {
2176 post_compilation_event(event, task);
2177 }
2178
2179 } else
2180 #endif // INCLUDE_JVMCI
2181 {
2182 NoHandleMark nhm;
2183 ThreadToNativeFromVM ttn(thread);
2184
2185 ciEnv ci_env(task);
2186 if (should_break) {
2187 ci_env.set_break_at_compile(true);
2188 }
2189 if (should_log) {
2190 ci_env.set_log(thread->log());
2191 }
2192 assert(thread->env() == &ci_env, "set by ci_env");
2193 // The thread-env() field is cleared in ~CompileTaskWrapper.
2194
2195 // Cache Jvmti state
2196 bool method_is_old = ci_env.cache_jvmti_state();
2197
2198 // Skip redefined methods
2199 if (method_is_old) {
2200 ci_env.record_method_not_compilable("redefined method", true);
2201 }
2202
2203 // Cache DTrace flags
2204 ci_env.cache_dtrace_flags();
2205
2206 ciMethod* target = ci_env.get_method_from_handle(target_handle);
2207
2208 TraceTime t1("compilation", &time);
2209 EventCompilation event;
2210
2211 if (comp == NULL) {
2212 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
2213 } else if (!ci_env.failing()) {
2214 if (WhiteBoxAPI && WhiteBox::compilation_locked) {
2215 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag);
2216 while (WhiteBox::compilation_locked) {
2217 locker.wait();
2218 }
2219 }
2220 comp->compile_method(&ci_env, target, osr_bci, directive);
2221 }
2222
2223 if (!ci_env.failing() && task->code() == NULL) {
2224 //assert(false, "compiler should always document failure");
2225 // The compiler elected, without comment, not to register a result.
2226 // Do not attempt further compilations of this method.
2227 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
2228 }
2229
2230 // Copy this bit to the enclosing block:
2231 compilable = ci_env.compilable();
2232
2233 if (ci_env.failing()) {
2234 failure_reason = ci_env.failure_reason();
2235 retry_message = ci_env.retry_message();
2236 ci_env.report_failure(failure_reason);
2237 }
2238
2239 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason);
2240 if (event.should_commit()) {
2241 post_compilation_event(event, task);
2242 }
2243 }
2244 // Remove the JNI handle block after the ciEnv destructor has run in
2245 // the previous block.
2246 pop_jni_handle_block();
2247
2248 if (failure_reason != NULL) {
2249 task->set_failure_reason(failure_reason, failure_reason_on_C_heap);
2250 if (_compilation_log != NULL) {
2251 _compilation_log->log_failure(thread, task, failure_reason, retry_message);
2252 }
2253 if (PrintCompilation) {
2254 FormatBufferResource msg = retry_message != NULL ?
2255 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) :
2256 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason);
2257 task->print(tty, msg);
2258 }
2259 }
2260
2261 methodHandle method(thread, task->method());
2262
2263 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2264
2265 collect_statistics(thread, time, task);
2266
2267 nmethod* nm = task->code();
2268 if (nm != NULL) {
2269 nm->maybe_print_nmethod(directive);
2270 }
2271 DirectivesStack::release(directive);
2272
2273 if (PrintCompilation && PrintCompilation2) {
2274 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2275 tty->print("%4d ", compile_id); // print compilation number
2276 tty->print("%s ", (is_osr ? "%" : " "));
2277 if (task->code() != NULL) {
2278 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2279 }
2280 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2281 }
2282
2283 Log(compilation, codecache) log;
2284 if (log.is_debug()) {
2285 LogStream ls(log.debug());
2286 codecache_print(&ls, /* detailed= */ false);
2287 }
2288 if (PrintCodeCacheOnCompilation) {
2289 codecache_print(/* detailed= */ false);
2290 }
2291 // Disable compilation, if required.
2292 switch (compilable) {
2293 case ciEnv::MethodCompilable_never:
2294 if (is_osr)
2295 method->set_not_osr_compilable_quietly("MethodCompilable_never");
2296 else
2297 method->set_not_compilable_quietly("MethodCompilable_never");
2298 break;
2299 case ciEnv::MethodCompilable_not_at_tier:
2300 if (is_osr)
2301 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2302 else
2303 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level);
2304 break;
2305 }
2306
2307 // Note that the queued_for_compilation bits are cleared without
2308 // protection of a mutex. [They were set by the requester thread,
2309 // when adding the task to the compile queue -- at which time the
2310 // compile queue lock was held. Subsequently, we acquired the compile
2311 // queue lock to get this task off the compile queue; thus (to belabour
2312 // the point somewhat) our clearing of the bits must be occurring
2313 // only after the setting of the bits. See also 14012000 above.
2314 method->clear_queued_for_compilation();
2315 }
2316
2317 /**
2318 * The CodeCache is full. Print warning and disable compilation.
2319 * Schedule code cache cleaning so compilation can continue later.
2320 * This function needs to be called only from CodeCache::allocate(),
2321 * since we currently handle a full code cache uniformly.
2322 */
2323 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2324 UseInterpreter = true;
2325 if (UseCompiler || AlwaysCompileLoopMethods ) {
2326 if (xtty != NULL) {
2327 ResourceMark rm;
2328 stringStream s;
2329 // Dump code cache state into a buffer before locking the tty,
2330 // because log_state() will use locks causing lock conflicts.
2331 CodeCache::log_state(&s);
2332 // Lock to prevent tearing
2333 ttyLocker ttyl;
2334 xtty->begin_elem("code_cache_full");
2335 xtty->print("%s", s.as_string());
2336 xtty->stamp();
2337 xtty->end_elem();
2338 }
2339
2340 #ifndef PRODUCT
2341 if (ExitOnFullCodeCache) {
2342 codecache_print(/* detailed= */ true);
2343 before_exit(JavaThread::current());
2344 exit_globals(); // will delete tty
2345 vm_direct_exit(1);
2346 }
2347 #endif
2348 if (UseCodeCacheFlushing) {
2349 // Since code cache is full, immediately stop new compiles
2350 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2351 NMethodSweeper::log_sweep("disable_compiler");
2352 }
2353 } else {
2354 disable_compilation_forever();
2355 }
2356
2357 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2358 }
2359 }
2360
2361 // ------------------------------------------------------------------
2362 // CompileBroker::update_compile_perf_data
2363 //
2364 // Record this compilation for debugging purposes.
2365 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) {
2366 ResourceMark rm;
2367 char* method_name = method->name()->as_C_string();
2368 char current_method[CompilerCounters::cmname_buffer_length];
2369 size_t maxLen = CompilerCounters::cmname_buffer_length;
2370
2371 const char* class_name = method->method_holder()->name()->as_C_string();
2372
2373 size_t s1len = strlen(class_name);
2374 size_t s2len = strlen(method_name);
2375
2376 // check if we need to truncate the string
2377 if (s1len + s2len + 2 > maxLen) {
2378
2379 // the strategy is to lop off the leading characters of the
2380 // class name and the trailing characters of the method name.
2381
2382 if (s2len + 2 > maxLen) {
2383 // lop of the entire class name string, let snprintf handle
2384 // truncation of the method name.
2385 class_name += s1len; // null string
2386 }
2387 else {
2388 // lop off the extra characters from the front of the class name
2389 class_name += ((s1len + s2len + 2) - maxLen);
2390 }
2391 }
2392
2393 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2394
2395 int last_compile_type = normal_compile;
2396 if (CICountOSR && is_osr) {
2397 last_compile_type = osr_compile;
2398 }
2399
2400 CompilerCounters* counters = thread->counters();
2401 counters->set_current_method(current_method);
2402 counters->set_compile_type((jlong) last_compile_type);
2403 }
2404
2405 // ------------------------------------------------------------------
2406 // CompileBroker::push_jni_handle_block
2407 //
2408 // Push on a new block of JNI handles.
2409 void CompileBroker::push_jni_handle_block() {
2410 JavaThread* thread = JavaThread::current();
2411
2412 // Allocate a new block for JNI handles.
2413 // Inlined code from jni_PushLocalFrame()
2414 JNIHandleBlock* java_handles = thread->active_handles();
2415 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2416 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2417 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2418 thread->set_active_handles(compile_handles);
2419 }
2420
2421
2422 // ------------------------------------------------------------------
2423 // CompileBroker::pop_jni_handle_block
2424 //
2425 // Pop off the current block of JNI handles.
2426 void CompileBroker::pop_jni_handle_block() {
2427 JavaThread* thread = JavaThread::current();
2428
2429 // Release our JNI handle block
2430 JNIHandleBlock* compile_handles = thread->active_handles();
2431 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2432 thread->set_active_handles(java_handles);
2433 compile_handles->set_pop_frame_link(NULL);
2434 JNIHandleBlock::release_block(compile_handles, thread); // may block
2435 }
2436
2437 // ------------------------------------------------------------------
2438 // CompileBroker::collect_statistics
2439 //
2440 // Collect statistics about the compilation.
2441
2442 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2443 bool success = task->is_success();
2444 methodHandle method (thread, task->method());
2445 uint compile_id = task->compile_id();
2446 bool is_osr = (task->osr_bci() != standard_entry_bci);
2447 nmethod* code = task->code();
2448 CompilerCounters* counters = thread->counters();
2449
2450 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2451 MutexLocker locker(CompileStatistics_lock);
2452
2453 // _perf variables are production performance counters which are
2454 // updated regardless of the setting of the CITime and CITimeEach flags
2455 //
2456
2457 // account all time, including bailouts and failures in this counter;
2458 // C1 and C2 counters are counting both successful and unsuccessful compiles
2459 _t_total_compilation.add(time);
2460
2461 if (!success) {
2462 _total_bailout_count++;
2463 if (UsePerfData) {
2464 _perf_last_failed_method->set_value(counters->current_method());
2465 _perf_last_failed_type->set_value(counters->compile_type());
2466 _perf_total_bailout_count->inc();
2467 }
2468 _t_bailedout_compilation.add(time);
2469 } else if (code == NULL) {
2470 if (UsePerfData) {
2471 _perf_last_invalidated_method->set_value(counters->current_method());
2472 _perf_last_invalidated_type->set_value(counters->compile_type());
2473 _perf_total_invalidated_count->inc();
2474 }
2475 _total_invalidated_count++;
2476 _t_invalidated_compilation.add(time);
2477 } else {
2478 // Compilation succeeded
2479
2480 // update compilation ticks - used by the implementation of
2481 // java.lang.management.CompilationMBean
2482 _perf_total_compilation->inc(time.ticks());
2483 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2484
2485 if (CITime) {
2486 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes();
2487 if (is_osr) {
2488 _t_osr_compilation.add(time);
2489 _sum_osr_bytes_compiled += bytes_compiled;
2490 } else {
2491 _t_standard_compilation.add(time);
2492 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2493 }
2494
2495 #if INCLUDE_JVMCI
2496 AbstractCompiler* comp = compiler(task->comp_level());
2497 if (comp) {
2498 CompilerStatistics* stats = comp->stats();
2499 if (stats) {
2500 if (is_osr) {
2501 stats->_osr.update(time, bytes_compiled);
2502 } else {
2503 stats->_standard.update(time, bytes_compiled);
2504 }
2505 stats->_nmethods_size += code->total_size();
2506 stats->_nmethods_code_size += code->insts_size();
2507 } else { // if (!stats)
2508 assert(false, "Compiler statistics object must exist");
2509 }
2510 } else { // if (!comp)
2511 assert(false, "Compiler object must exist");
2512 }
2513 #endif // INCLUDE_JVMCI
2514 }
2515
2516 if (UsePerfData) {
2517 // save the name of the last method compiled
2518 _perf_last_method->set_value(counters->current_method());
2519 _perf_last_compile_type->set_value(counters->compile_type());
2520 _perf_last_compile_size->set_value(method->code_size() +
2521 task->num_inlined_bytecodes());
2522 if (is_osr) {
2523 _perf_osr_compilation->inc(time.ticks());
2524 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2525 } else {
2526 _perf_standard_compilation->inc(time.ticks());
2527 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2528 }
2529 }
2530
2531 if (CITimeEach) {
2532 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2533 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2534 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2535 }
2536
2537 // Collect counts of successful compilations
2538 _sum_nmethod_size += code->total_size();
2539 _sum_nmethod_code_size += code->insts_size();
2540 _total_compile_count++;
2541
2542 if (UsePerfData) {
2543 _perf_sum_nmethod_size->inc( code->total_size());
2544 _perf_sum_nmethod_code_size->inc(code->insts_size());
2545 _perf_total_compile_count->inc();
2546 }
2547
2548 if (is_osr) {
2549 if (UsePerfData) _perf_total_osr_compile_count->inc();
2550 _total_osr_compile_count++;
2551 } else {
2552 if (UsePerfData) _perf_total_standard_compile_count->inc();
2553 _total_standard_compile_count++;
2554 }
2555 }
2556 // set the current method for the thread to null
2557 if (UsePerfData) counters->set_current_method("");
2558 }
2559
2560 const char* CompileBroker::compiler_name(int comp_level) {
2561 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2562 if (comp == NULL) {
2563 return "no compiler";
2564 } else {
2565 return (comp->name());
2566 }
2567 }
2568
2569 #if INCLUDE_JVMCI
2570 void CompileBroker::print_times(AbstractCompiler* comp) {
2571 CompilerStatistics* stats = comp->stats();
2572 if (stats) {
2573 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}",
2574 comp->name(), stats->bytes_per_second(),
2575 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count,
2576 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count,
2577 stats->_nmethods_size, stats->_nmethods_code_size);
2578 } else { // if (!stats)
2579 assert(false, "Compiler statistics object must exist");
2580 }
2581 comp->print_timers();
2582 }
2583 #endif // INCLUDE_JVMCI
2584
2585 void CompileBroker::print_times(bool per_compiler, bool aggregate) {
2586 #if INCLUDE_JVMCI
2587 elapsedTimer standard_compilation;
2588 elapsedTimer total_compilation;
2589 elapsedTimer osr_compilation;
2590
2591 int standard_bytes_compiled = 0;
2592 int osr_bytes_compiled = 0;
2593
2594 int standard_compile_count = 0;
2595 int osr_compile_count = 0;
2596 int total_compile_count = 0;
2597
2598 int nmethods_size = 0;
2599 int nmethods_code_size = 0;
2600 bool printedHeader = false;
2601
2602 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) {
2603 AbstractCompiler* comp = _compilers[i];
2604 if (comp != NULL) {
2605 if (per_compiler && aggregate && !printedHeader) {
2606 printedHeader = true;
2607 tty->cr();
2608 tty->print_cr("Individual compiler times (for compiled methods only)");
2609 tty->print_cr("------------------------------------------------");
2610 tty->cr();
2611 }
2612 CompilerStatistics* stats = comp->stats();
2613
2614 if (stats) {
2615 standard_compilation.add(stats->_standard._time);
2616 osr_compilation.add(stats->_osr._time);
2617
2618 standard_bytes_compiled += stats->_standard._bytes;
2619 osr_bytes_compiled += stats->_osr._bytes;
2620
2621 standard_compile_count += stats->_standard._count;
2622 osr_compile_count += stats->_osr._count;
2623
2624 nmethods_size += stats->_nmethods_size;
2625 nmethods_code_size += stats->_nmethods_code_size;
2626 } else { // if (!stats)
2627 assert(false, "Compiler statistics object must exist");
2628 }
2629
2630 if (per_compiler) {
2631 print_times(comp);
2632 }
2633 }
2634 }
2635 total_compile_count = osr_compile_count + standard_compile_count;
2636 total_compilation.add(osr_compilation);
2637 total_compilation.add(standard_compilation);
2638
2639 // In hosted mode, print the JVMCI compiler specific counters manually.
2640 if (!UseJVMCICompiler) {
2641 JVMCICompiler::print_compilation_timers();
2642 }
2643 #else // INCLUDE_JVMCI
2644 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation;
2645 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation;
2646 elapsedTimer total_compilation = CompileBroker::_t_total_compilation;
2647
2648 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled;
2649 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled;
2650
2651 int standard_compile_count = CompileBroker::_total_standard_compile_count;
2652 int osr_compile_count = CompileBroker::_total_osr_compile_count;
2653 int total_compile_count = CompileBroker::_total_compile_count;
2654
2655 int nmethods_size = CompileBroker::_sum_nmethod_code_size;
2656 int nmethods_code_size = CompileBroker::_sum_nmethod_size;
2657 #endif // INCLUDE_JVMCI
2658
2659 if (!aggregate) {
2660 return;
2661 }
2662 tty->cr();
2663 tty->print_cr("Accumulated compiler times");
2664 tty->print_cr("----------------------------------------------------------");
2665 //0000000000111111111122222222223333333333444444444455555555556666666666
2666 //0123456789012345678901234567890123456789012345678901234567890123456789
2667 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds());
2668 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2669 standard_compilation.seconds(),
2670 standard_compilation.seconds() / standard_compile_count);
2671 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2672 CompileBroker::_t_bailedout_compilation.seconds(),
2673 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2674 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2675 osr_compilation.seconds(),
2676 osr_compilation.seconds() / osr_compile_count);
2677 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2678 CompileBroker::_t_invalidated_compilation.seconds(),
2679 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2680
2681 AbstractCompiler *comp = compiler(CompLevel_simple);
2682 if (comp != NULL) {
2683 tty->cr();
2684 comp->print_timers();
2685 }
2686 comp = compiler(CompLevel_full_optimization);
2687 if (comp != NULL) {
2688 tty->cr();
2689 comp->print_timers();
2690 }
2691 tty->cr();
2692 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count);
2693 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count);
2694 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count);
2695 int tcb = osr_bytes_compiled + standard_bytes_compiled;
2696 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2697 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled);
2698 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled);
2699 double tcs = total_compilation.seconds();
2700 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs);
2701 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2702 tty->cr();
2703 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size);
2704 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size);
2705 }
2706
2707 // Print general/accumulated JIT information.
2708 void CompileBroker::print_info(outputStream *out) {
2709 if (out == NULL) out = tty;
2710 out->cr();
2711 out->print_cr("======================");
2712 out->print_cr(" General JIT info ");
2713 out->print_cr("======================");
2714 out->cr();
2715 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off");
2716 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount);
2717 out->cr();
2718 out->print_cr("CodeCache overview");
2719 out->print_cr("--------------------------------------------------------");
2720 out->cr();
2721 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K);
2722 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K);
2723 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K);
2724 out->cr();
2725
2726 out->cr();
2727 out->print_cr("CodeCache cleaning overview");
2728 out->print_cr("--------------------------------------------------------");
2729 out->cr();
2730 NMethodSweeper::print(out);
2731 out->print_cr("--------------------------------------------------------");
2732 out->cr();
2733 }
2734
2735 // Note: tty_lock must not be held upon entry to this function.
2736 // Print functions called from herein do "micro-locking" on tty_lock.
2737 // That's a tradeoff which keeps together important blocks of output.
2738 // At the same time, continuous tty_lock hold time is kept in check,
2739 // preventing concurrently printing threads from stalling a long time.
2740 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) {
2741 TimeStamp ts_total;
2742 TimeStamp ts_global;
2743 TimeStamp ts;
2744
2745 bool allFun = !strcmp(function, "all");
2746 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun;
2747 bool usedSpace = !strcmp(function, "UsedSpace") || allFun;
2748 bool freeSpace = !strcmp(function, "FreeSpace") || allFun;
2749 bool methodCount = !strcmp(function, "MethodCount") || allFun;
2750 bool methodSpace = !strcmp(function, "MethodSpace") || allFun;
2751 bool methodAge = !strcmp(function, "MethodAge") || allFun;
2752 bool methodNames = !strcmp(function, "MethodNames") || allFun;
2753 bool discard = !strcmp(function, "discard") || allFun;
2754
2755 if (out == NULL) {
2756 out = tty;
2757 }
2758
2759 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) {
2760 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function);
2761 out->cr();
2762 return;
2763 }
2764
2765 ts_total.update(); // record starting point
2766
2767 if (aggregate) {
2768 print_info(out);
2769 }
2770
2771 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function.
2772 // That prevents another thread from destroying our view on the CodeHeap.
2773 // When we request individual parts of the analysis via the jcmd interface, it is possible
2774 // that in between another thread (another jcmd user or the vm running into CodeCache OOM)
2775 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock
2776 // across user interaction.
2777 // Acquire this lock before acquiring the CodeCache_lock.
2778 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time,
2779 // leading to an unnecessarily long hold time of the CodeCache_lock.
2780 ts.update(); // record starting point
2781 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag);
2782 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds());
2783
2784 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock
2785 // for the entire duration of aggregation and printing. That makes sure
2786 // we see a consistent picture and do not run into issues caused by
2787 // the CodeHeap being altered concurrently.
2788 Mutex* global_lock = allFun ? CodeCache_lock : NULL;
2789 Mutex* function_lock = allFun ? NULL : CodeCache_lock;
2790 ts_global.update(); // record starting point
2791 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag);
2792 if (global_lock != NULL) {
2793 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds());
2794 ts_global.update(); // record starting point
2795 }
2796
2797 if (aggregate) {
2798 ts.update(); // record starting point
2799 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2800 if (function_lock != NULL) {
2801 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds());
2802 }
2803
2804 ts.update(); // record starting point
2805 CodeCache::aggregate(out, granularity);
2806 if (function_lock != NULL) {
2807 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds());
2808 }
2809 }
2810
2811 if (usedSpace) CodeCache::print_usedSpace(out);
2812 if (freeSpace) CodeCache::print_freeSpace(out);
2813 if (methodCount) CodeCache::print_count(out);
2814 if (methodSpace) CodeCache::print_space(out);
2815 if (methodAge) CodeCache::print_age(out);
2816 if (methodNames) {
2817 // print_names() has shown to be sensitive to concurrent CodeHeap modifications.
2818 // Therefore, request the CodeCache_lock before calling...
2819 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag);
2820 CodeCache::print_names(out);
2821 }
2822 if (discard) CodeCache::discard(out);
2823
2824 if (global_lock != NULL) {
2825 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds());
2826 }
2827 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds());
2828 }
2829