1 /*
2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/codeCache.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "oops/methodDataOop.hpp"
35 #include "oops/methodOop.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/nativeLookup.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/init.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/os.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/sweeper.hpp"
46 #include "utilities/dtrace.hpp"
47 #include "utilities/events.hpp"
48 #ifdef COMPILER1
49 #include "c1/c1_Compiler.hpp"
50 #endif
51 #ifdef COMPILER2
52 #include "opto/c2compiler.hpp"
53 #endif
54 #ifdef SHARK
55 #include "shark/sharkCompiler.hpp"
56 #endif
57
58 #ifdef DTRACE_ENABLED
59
60 // Only bother with this argument setup if dtrace is available
61
62 #ifndef USDT2
63 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
64 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
65 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
66 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
67
68 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
69 { \
70 char* comp_name = (char*)(compiler)->name(); \
71 Symbol* klass_name = (method)->klass_name(); \
72 Symbol* name = (method)->name(); \
73 Symbol* signature = (method)->signature(); \
74 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
75 comp_name, strlen(comp_name), \
76 klass_name->bytes(), klass_name->utf8_length(), \
77 name->bytes(), name->utf8_length(), \
78 signature->bytes(), signature->utf8_length()); \
79 }
80
81 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
82 { \
83 char* comp_name = (char*)(compiler)->name(); \
84 Symbol* klass_name = (method)->klass_name(); \
85 Symbol* name = (method)->name(); \
86 Symbol* signature = (method)->signature(); \
87 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
88 comp_name, strlen(comp_name), \
89 klass_name->bytes(), klass_name->utf8_length(), \
90 name->bytes(), name->utf8_length(), \
91 signature->bytes(), signature->utf8_length(), (success)); \
92 }
93
94 #else /* USDT2 */
95
96 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
97 { \
98 char* comp_name = (char*)(compiler)->name(); \
99 Symbol* klass_name = (method)->klass_name(); \
100 Symbol* name = (method)->name(); \
101 Symbol* signature = (method)->signature(); \
102 HOTSPOT_METHOD_COMPILE_BEGIN( \
103 comp_name, strlen(comp_name), \
104 (char *) klass_name->bytes(), klass_name->utf8_length(), \
105 (char *) name->bytes(), name->utf8_length(), \
106 (char *) signature->bytes(), signature->utf8_length()); \
107 }
108
109 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
110 { \
111 char* comp_name = (char*)(compiler)->name(); \
112 Symbol* klass_name = (method)->klass_name(); \
113 Symbol* name = (method)->name(); \
114 Symbol* signature = (method)->signature(); \
115 HOTSPOT_METHOD_COMPILE_END( \
116 comp_name, strlen(comp_name), \
117 (char *) klass_name->bytes(), klass_name->utf8_length(), \
118 (char *) name->bytes(), name->utf8_length(), \
119 (char *) signature->bytes(), signature->utf8_length(), (success)); \
120 }
121 #endif /* USDT2 */
122
123 #else // ndef DTRACE_ENABLED
124
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
127
128 #endif // ndef DTRACE_ENABLED
129
130 bool CompileBroker::_initialized = false;
131 volatile bool CompileBroker::_should_block = false;
132 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
133
134 // The installed compiler(s)
135 AbstractCompiler* CompileBroker::_compilers[2];
136
137 // These counters are used for assigning id's to each compilation
138 uint CompileBroker::_compilation_id = 0;
139 uint CompileBroker::_osr_compilation_id = 0;
140
141 // Debugging information
142 int CompileBroker::_last_compile_type = no_compile;
143 int CompileBroker::_last_compile_level = CompLevel_none;
144 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
145
146 // Performance counters
147 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
148 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
149 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
150
151 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
153 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
154 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
155 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
156
157 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
158 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
159 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
160 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
161
162 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
163 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
164 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
165 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
166 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
167 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
168 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
169
170 // Timers and counters for generating statistics
171 elapsedTimer CompileBroker::_t_total_compilation;
172 elapsedTimer CompileBroker::_t_osr_compilation;
173 elapsedTimer CompileBroker::_t_standard_compilation;
174
175 int CompileBroker::_total_bailout_count = 0;
176 int CompileBroker::_total_invalidated_count = 0;
177 int CompileBroker::_total_compile_count = 0;
178 int CompileBroker::_total_osr_compile_count = 0;
179 int CompileBroker::_total_standard_compile_count = 0;
180
181 int CompileBroker::_sum_osr_bytes_compiled = 0;
182 int CompileBroker::_sum_standard_bytes_compiled = 0;
183 int CompileBroker::_sum_nmethod_size = 0;
184 int CompileBroker::_sum_nmethod_code_size = 0;
185
186 CompileQueue* CompileBroker::_c2_method_queue = NULL;
187 CompileQueue* CompileBroker::_c1_method_queue = NULL;
188 CompileTask* CompileBroker::_task_free_list = NULL;
189
190 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
191
192
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
197
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream msg = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print_compilation(&msg, true);
203 log(thread, "%s", (const char*)lm);
204 }
205
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm, nm->code_begin(), nm->code_end());
209 }
210
211 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
212 StringLogMessage lm;
213 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
214 if (retry_message != NULL) {
215 lm.append(" (%s)", retry_message);
216 }
217 lm.print("\n");
218 log(thread, "%s", (const char*)lm);
219 }
220 };
221
222 static CompilationLog* _compilation_log = NULL;
223
224 void compileBroker_init() {
225 if (LogEvents) {
226 _compilation_log = new CompilationLog();
227 }
228 }
229
230 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
231 CompilerThread* thread = CompilerThread::current();
232 thread->set_task(task);
233 CompileLog* log = thread->log();
234 if (log != NULL) task->log_task_start(log);
235 }
236
237 CompileTaskWrapper::~CompileTaskWrapper() {
238 CompilerThread* thread = CompilerThread::current();
239 CompileTask* task = thread->task();
240 CompileLog* log = thread->log();
241 if (log != NULL) task->log_task_done(log);
242 thread->set_task(NULL);
243 task->set_code_handle(NULL);
244 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress));
245 if (task->is_blocking()) {
246 MutexLocker notifier(task->lock(), thread);
247 task->mark_complete();
248 // Notify the waiting thread that the compilation has completed.
249 task->lock()->notify_all();
250 } else {
251 task->mark_complete();
252
253 // By convention, the compiling thread is responsible for
254 // recycling a non-blocking CompileTask.
255 CompileBroker::free_task(task);
256 }
257 }
258
259
260 // ------------------------------------------------------------------
261 // CompileTask::initialize
262 void CompileTask::initialize(int compile_id,
263 methodHandle method,
264 int osr_bci,
265 int comp_level,
266 methodHandle hot_method,
267 int hot_count,
268 const char* comment,
269 bool is_blocking) {
270 assert(!_lock->is_locked(), "bad locking");
271
272 _compile_id = compile_id;
273 _method = JNIHandles::make_global(method);
274 _osr_bci = osr_bci;
275 _is_blocking = is_blocking;
276 _comp_level = comp_level;
277 _num_inlined_bytecodes = 0;
278
279 _is_complete = false;
280 _is_success = false;
281 _code_handle = NULL;
282
283 _hot_method = NULL;
284 _hot_count = hot_count;
285 _time_queued = 0; // tidy
286 _comment = comment;
287
288 if (LogCompilation) {
289 _time_queued = os::elapsed_counter();
290 if (hot_method.not_null()) {
291 if (hot_method == method) {
292 _hot_method = _method;
293 } else {
294 _hot_method = JNIHandles::make_global(hot_method);
295 }
296 }
297 }
298
299 _next = NULL;
300 }
301
302 // ------------------------------------------------------------------
303 // CompileTask::code/set_code
304 nmethod* CompileTask::code() const {
305 if (_code_handle == NULL) return NULL;
306 return _code_handle->code();
307 }
308 void CompileTask::set_code(nmethod* nm) {
309 if (_code_handle == NULL && nm == NULL) return;
310 guarantee(_code_handle != NULL, "");
311 _code_handle->set_code(nm);
312 if (nm == NULL) _code_handle = NULL; // drop the handle also
313 }
314
315 // ------------------------------------------------------------------
316 // CompileTask::free
317 void CompileTask::free() {
318 set_code(NULL);
319 assert(!_lock->is_locked(), "Should not be locked when freed");
320 if (_hot_method != NULL && _hot_method != _method) {
321 JNIHandles::destroy_global(_hot_method);
322 }
323 JNIHandles::destroy_global(_method);
324 }
325
326
327 // ------------------------------------------------------------------
328 // CompileTask::print
329 void CompileTask::print() {
330 tty->print("<CompileTask compile_id=%d ", _compile_id);
331 tty->print("method=");
332 ((methodOop)JNIHandles::resolve(_method))->print_name(tty);
333 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
334 _osr_bci, bool_to_str(_is_blocking),
335 bool_to_str(_is_complete), bool_to_str(_is_success));
336 }
337
338
339 // ------------------------------------------------------------------
340 // CompileTask::print_line_on_error
341 //
342 // This function is called by fatal error handler when the thread
343 // causing troubles is a compiler thread.
344 //
345 // Do not grab any lock, do not allocate memory.
346 //
347 // Otherwise it's the same as CompileTask::print_line()
348 //
349 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
350 // print compiler name
351 st->print("%s:", CompileBroker::compiler(comp_level())->name());
352 print_compilation(st);
353 }
354
355 // ------------------------------------------------------------------
356 // CompileTask::print_line
357 void CompileTask::print_line() {
358 ttyLocker ttyl; // keep the following output all in one block
359 // print compiler name if requested
360 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
361 print_compilation();
362 }
363
364
365 // ------------------------------------------------------------------
366 // CompileTask::print_compilation_impl
367 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level,
368 bool is_osr_method, int osr_bci, bool is_blocking,
369 const char* msg, bool short_form) {
370 if (!short_form) {
371 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
372 }
373 st->print("%4d ", compile_id); // print compilation number
374
375 // For unloaded methods the transition to zombie occurs after the
376 // method is cleared so it's impossible to report accurate
377 // information for that case.
378 bool is_synchronized = false;
379 bool has_exception_handler = false;
380 bool is_native = false;
381 if (method != NULL) {
382 is_synchronized = method->is_synchronized();
383 has_exception_handler = method->has_exception_handler();
384 is_native = method->is_native();
385 }
386 // method attributes
387 const char compile_type = is_osr_method ? '%' : ' ';
388 const char sync_char = is_synchronized ? 's' : ' ';
389 const char exception_char = has_exception_handler ? '!' : ' ';
390 const char blocking_char = is_blocking ? 'b' : ' ';
391 const char native_char = is_native ? 'n' : ' ';
392
393 // print method attributes
394 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
395
396 if (TieredCompilation) {
397 if (comp_level != -1) st->print("%d ", comp_level);
398 else st->print("- ");
399 }
400 st->print(" "); // more indent
401
402 if (method == NULL) {
403 st->print("(method)");
404 } else {
405 method->print_short_name(st);
406 if (is_osr_method) {
407 st->print(" @ %d", osr_bci);
408 }
409 st->print(" (%d bytes)", method->code_size());
410 }
411
412 if (msg != NULL) {
413 st->print(" %s", msg);
414 }
415 if (!short_form) {
416 st->cr();
417 }
418 }
419
420 // ------------------------------------------------------------------
421 // CompileTask::print_inlining
422 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
423 // 1234567
424 st->print(" "); // print timestamp
425 // 1234
426 st->print(" "); // print compilation number
427
428 // method attributes
429 const char sync_char = method->is_synchronized() ? 's' : ' ';
430 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
431 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
432
433 // print method attributes
434 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
435
436 if (TieredCompilation) {
437 st->print(" ");
438 }
439 st->print(" "); // more indent
440 st->print(" "); // initial inlining indent
441
442 for (int i = 0; i < inline_level; i++) st->print(" ");
443
444 st->print("@ %d ", bci); // print bci
445 method->print_short_name(st);
446 st->print(" (%d bytes)", method->code_size());
447
448 if (msg != NULL) {
449 st->print(" %s", msg);
450 }
451 st->cr();
452 }
453
454 // ------------------------------------------------------------------
455 // CompileTask::print_inline_indent
456 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
457 // 1234567
458 st->print(" "); // print timestamp
459 // 1234
460 st->print(" "); // print compilation number
461 // %s!bn
462 st->print(" "); // print method attributes
463 if (TieredCompilation) {
464 st->print(" ");
465 }
466 st->print(" "); // more indent
467 st->print(" "); // initial inlining indent
468 for (int i = 0; i < inline_level; i++) st->print(" ");
469 }
470
471 // ------------------------------------------------------------------
472 // CompileTask::print_compilation
473 void CompileTask::print_compilation(outputStream* st, bool short_form) {
474 oop rem = JNIHandles::resolve(method_handle());
475 assert(rem != NULL && rem->is_method(), "must be");
476 methodOop method = (methodOop) rem;
477 bool is_osr_method = osr_bci() != InvocationEntryBci;
478 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), NULL, short_form);
479 }
480
481 // ------------------------------------------------------------------
482 // CompileTask::log_task
483 void CompileTask::log_task(xmlStream* log) {
484 Thread* thread = Thread::current();
485 methodHandle method(thread,
486 (methodOop)JNIHandles::resolve(method_handle()));
487 ResourceMark rm(thread);
488
489 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
490 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id);
491 if (_osr_bci != CompileBroker::standard_entry_bci) {
492 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
493 } // else compile_kind='c2c'
494 if (!method.is_null()) log->method(method);
495 if (_osr_bci != CompileBroker::standard_entry_bci) {
496 log->print(" osr_bci='%d'", _osr_bci);
497 }
498 if (_comp_level != CompLevel_highest_tier) {
499 log->print(" level='%d'", _comp_level);
500 }
501 if (_is_blocking) {
502 log->print(" blocking='1'");
503 }
504 log->stamp();
505 }
506
507
508 // ------------------------------------------------------------------
509 // CompileTask::log_task_queued
510 void CompileTask::log_task_queued() {
511 Thread* thread = Thread::current();
512 ttyLocker ttyl;
513 ResourceMark rm(thread);
514
515 xtty->begin_elem("task_queued");
516 log_task(xtty);
517 if (_comment != NULL) {
518 xtty->print(" comment='%s'", _comment);
519 }
520 if (_hot_method != NULL) {
521 methodHandle hot(thread,
522 (methodOop)JNIHandles::resolve(_hot_method));
523 methodHandle method(thread,
524 (methodOop)JNIHandles::resolve(_method));
525 if (hot() != method()) {
526 xtty->method(hot);
527 }
528 }
529 if (_hot_count != 0) {
530 xtty->print(" hot_count='%d'", _hot_count);
531 }
532 xtty->end_elem();
533 }
534
535
536 // ------------------------------------------------------------------
537 // CompileTask::log_task_start
538 void CompileTask::log_task_start(CompileLog* log) {
539 log->begin_head("task");
540 log_task(log);
541 log->end_head();
542 }
543
544
545 // ------------------------------------------------------------------
546 // CompileTask::log_task_done
547 void CompileTask::log_task_done(CompileLog* log) {
548 Thread* thread = Thread::current();
549 methodHandle method(thread,
550 (methodOop)JNIHandles::resolve(method_handle()));
551 ResourceMark rm(thread);
552
553 // <task_done ... stamp='1.234'> </task>
554 nmethod* nm = code();
555 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
556 _is_success, nm == NULL ? 0 : nm->content_size(),
557 method->invocation_count());
558 int bec = method->backedge_count();
559 if (bec != 0) log->print(" backedge_count='%d'", bec);
560 // Note: "_is_complete" is about to be set, but is not.
561 if (_num_inlined_bytecodes != 0) {
562 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
563 }
564 log->stamp();
565 log->end_elem();
566 log->tail("task");
567 log->clear_identities(); // next task will have different CI
568 if (log->unflushed_count() > 2000) {
569 log->flush();
570 }
571 log->mark_file_end();
572 }
573
574
575
576 // ------------------------------------------------------------------
577 // CompileQueue::add
578 //
579 // Add a CompileTask to a CompileQueue
580 void CompileQueue::add(CompileTask* task) {
581 assert(lock()->owned_by_self(), "must own lock");
582
583 task->set_next(NULL);
584 task->set_prev(NULL);
585
586 if (_last == NULL) {
587 // The compile queue is empty.
588 assert(_first == NULL, "queue is empty");
589 _first = task;
590 _last = task;
591 } else {
592 // Append the task to the queue.
593 assert(_last->next() == NULL, "not last");
594 _last->set_next(task);
595 task->set_prev(_last);
596 _last = task;
597 }
598 ++_size;
599
600 // Mark the method as being in the compile queue.
601 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation();
602
603 if (CIPrintCompileQueue) {
604 print();
605 }
606
607 if (LogCompilation && xtty != NULL) {
608 task->log_task_queued();
609 }
610
611 // Notify CompilerThreads that a task is available.
612 lock()->notify_all();
613 }
614
615 // ------------------------------------------------------------------
616 // CompileQueue::get
617 //
618 // Get the next CompileTask from a CompileQueue
619 CompileTask* CompileQueue::get() {
620 NMethodSweeper::possibly_sweep();
621
622 MutexLocker locker(lock());
623 // Wait for an available CompileTask.
624 while (_first == NULL) {
625 // There is no work to be done right now. Wait.
626 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
627 // During the emergency sweeping periods, wake up and sweep occasionally
628 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
629 if (timedout) {
630 MutexUnlocker ul(lock());
631 // When otherwise not busy, run nmethod sweeping
632 NMethodSweeper::possibly_sweep();
633 }
634 } else {
635 // During normal operation no need to wake up on timer
636 lock()->wait();
637 }
638 }
639 CompileTask* task = CompilationPolicy::policy()->select_task(this);
640 remove(task);
641 return task;
642 }
643
644 void CompileQueue::remove(CompileTask* task)
645 {
646 assert(lock()->owned_by_self(), "must own lock");
647 if (task->prev() != NULL) {
648 task->prev()->set_next(task->next());
649 } else {
650 // max is the first element
651 assert(task == _first, "Sanity");
652 _first = task->next();
653 }
654
655 if (task->next() != NULL) {
656 task->next()->set_prev(task->prev());
657 } else {
658 // max is the last element
659 assert(task == _last, "Sanity");
660 _last = task->prev();
661 }
662 --_size;
663 }
664
665 // ------------------------------------------------------------------
666 // CompileQueue::print
667 void CompileQueue::print() {
668 tty->print_cr("Contents of %s", name());
669 tty->print_cr("----------------------");
670 CompileTask* task = _first;
671 while (task != NULL) {
672 task->print_line();
673 task = task->next();
674 }
675 tty->print_cr("----------------------");
676 }
677
678 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
679
680 _current_method[0] = '\0';
681 _compile_type = CompileBroker::no_compile;
682
683 if (UsePerfData) {
684 ResourceMark rm;
685
686 // create the thread instance name space string - don't create an
687 // instance subspace if instance is -1 - keeps the adapterThread
688 // counters from having a ".0" namespace.
689 const char* thread_i = (instance == -1) ? thread_name :
690 PerfDataManager::name_space(thread_name, instance);
691
692
693 char* name = PerfDataManager::counter_name(thread_i, "method");
694 _perf_current_method =
695 PerfDataManager::create_string_variable(SUN_CI, name,
696 cmname_buffer_length,
697 _current_method, CHECK);
698
699 name = PerfDataManager::counter_name(thread_i, "type");
700 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
701 PerfData::U_None,
702 (jlong)_compile_type,
703 CHECK);
704
705 name = PerfDataManager::counter_name(thread_i, "time");
706 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
707 PerfData::U_Ticks, CHECK);
708
709 name = PerfDataManager::counter_name(thread_i, "compiles");
710 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
711 PerfData::U_Events, CHECK);
712 }
713 }
714
715 // ------------------------------------------------------------------
716 // CompileBroker::compilation_init
717 //
718 // Initialize the Compilation object
719 void CompileBroker::compilation_init() {
720 _last_method_compiled[0] = '\0';
721
722 #ifndef SHARK
723 // Set the interface to the current compiler(s).
724 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
725 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
726 #ifdef COMPILER1
727 if (c1_count > 0) {
728 _compilers[0] = new Compiler();
729 }
730 #endif // COMPILER1
731
732 #ifdef COMPILER2
733 if (c2_count > 0) {
734 _compilers[1] = new C2Compiler();
735 }
736 #endif // COMPILER2
737
738 #else // SHARK
739 int c1_count = 0;
740 int c2_count = 1;
741
742 _compilers[1] = new SharkCompiler();
743 #endif // SHARK
744
745 // Initialize the CompileTask free list
746 _task_free_list = NULL;
747
748 // Start the CompilerThreads
749 init_compiler_threads(c1_count, c2_count);
750 // totalTime performance counter is always created as it is required
751 // by the implementation of java.lang.management.CompilationMBean.
752 {
753 EXCEPTION_MARK;
754 _perf_total_compilation =
755 PerfDataManager::create_counter(JAVA_CI, "totalTime",
756 PerfData::U_Ticks, CHECK);
757 }
758
759
760 if (UsePerfData) {
761
762 EXCEPTION_MARK;
763
764 // create the jvmstat performance counters
765 _perf_osr_compilation =
766 PerfDataManager::create_counter(SUN_CI, "osrTime",
767 PerfData::U_Ticks, CHECK);
768
769 _perf_standard_compilation =
770 PerfDataManager::create_counter(SUN_CI, "standardTime",
771 PerfData::U_Ticks, CHECK);
772
773 _perf_total_bailout_count =
774 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
775 PerfData::U_Events, CHECK);
776
777 _perf_total_invalidated_count =
778 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
779 PerfData::U_Events, CHECK);
780
781 _perf_total_compile_count =
782 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
783 PerfData::U_Events, CHECK);
784 _perf_total_osr_compile_count =
785 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
786 PerfData::U_Events, CHECK);
787
788 _perf_total_standard_compile_count =
789 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
790 PerfData::U_Events, CHECK);
791
792 _perf_sum_osr_bytes_compiled =
793 PerfDataManager::create_counter(SUN_CI, "osrBytes",
794 PerfData::U_Bytes, CHECK);
795
796 _perf_sum_standard_bytes_compiled =
797 PerfDataManager::create_counter(SUN_CI, "standardBytes",
798 PerfData::U_Bytes, CHECK);
799
800 _perf_sum_nmethod_size =
801 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
802 PerfData::U_Bytes, CHECK);
803
804 _perf_sum_nmethod_code_size =
805 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
806 PerfData::U_Bytes, CHECK);
807
808 _perf_last_method =
809 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
810 CompilerCounters::cmname_buffer_length,
811 "", CHECK);
812
813 _perf_last_failed_method =
814 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
815 CompilerCounters::cmname_buffer_length,
816 "", CHECK);
817
818 _perf_last_invalidated_method =
819 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
820 CompilerCounters::cmname_buffer_length,
821 "", CHECK);
822
823 _perf_last_compile_type =
824 PerfDataManager::create_variable(SUN_CI, "lastType",
825 PerfData::U_None,
826 (jlong)CompileBroker::no_compile,
827 CHECK);
828
829 _perf_last_compile_size =
830 PerfDataManager::create_variable(SUN_CI, "lastSize",
831 PerfData::U_Bytes,
832 (jlong)CompileBroker::no_compile,
833 CHECK);
834
835
836 _perf_last_failed_type =
837 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
838 PerfData::U_None,
839 (jlong)CompileBroker::no_compile,
840 CHECK);
841
842 _perf_last_invalidated_type =
843 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
844 PerfData::U_None,
845 (jlong)CompileBroker::no_compile,
846 CHECK);
847 }
848
849 _initialized = true;
850 }
851
852
853
854 // ------------------------------------------------------------------
855 // CompileBroker::make_compiler_thread
856 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
857 CompilerThread* compiler_thread = NULL;
858
859 klassOop k =
860 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
861 true, CHECK_0);
862 instanceKlassHandle klass (THREAD, k);
863 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
864 Handle string = java_lang_String::create_from_str(name, CHECK_0);
865
866 // Initialize thread_oop to put it into the system threadGroup
867 Handle thread_group (THREAD, Universe::system_thread_group());
868 JavaValue result(T_VOID);
869 JavaCalls::call_special(&result, thread_oop,
870 klass,
871 vmSymbols::object_initializer_name(),
872 vmSymbols::threadgroup_string_void_signature(),
873 thread_group,
874 string,
875 CHECK_0);
876
877 {
878 MutexLocker mu(Threads_lock, THREAD);
879 compiler_thread = new CompilerThread(queue, counters);
880 // At this point the new CompilerThread data-races with this startup
881 // thread (which I believe is the primoridal thread and NOT the VM
882 // thread). This means Java bytecodes being executed at startup can
883 // queue compile jobs which will run at whatever default priority the
884 // newly created CompilerThread runs at.
885
886
887 // At this point it may be possible that no osthread was created for the
888 // JavaThread due to lack of memory. We would have to throw an exception
889 // in that case. However, since this must work and we do not allow
890 // exceptions anyway, check and abort if this fails.
891
892 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
893 vm_exit_during_initialization("java.lang.OutOfMemoryError",
894 "unable to create new native thread");
895 }
896
897 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
898
899 // Note that this only sets the JavaThread _priority field, which by
900 // definition is limited to Java priorities and not OS priorities.
901 // The os-priority is set in the CompilerThread startup code itself
902
903 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
904
905 // Note that we cannot call os::set_priority because it expects Java
906 // priorities and we are *explicitly* using OS priorities so that it's
907 // possible to set the compiler thread priority higher than any Java
908 // thread.
909
910 int native_prio = CompilerThreadPriority;
911 if (native_prio == -1) {
912 if (UseCriticalCompilerThreadPriority) {
913 native_prio = os::java_to_os_priority[CriticalPriority];
914 } else {
915 native_prio = os::java_to_os_priority[NearMaxPriority];
916 }
917 }
918 os::set_native_priority(compiler_thread, native_prio);
919
920 java_lang_Thread::set_daemon(thread_oop());
921
922 compiler_thread->set_threadObj(thread_oop());
923 Threads::add(compiler_thread);
924 Thread::start(compiler_thread);
925 }
926
927 // Let go of Threads_lock before yielding
928 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
929
930 return compiler_thread;
931 }
932
933
934 // ------------------------------------------------------------------
935 // CompileBroker::init_compiler_threads
936 //
937 // Initialize the compilation queue
938 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
939 EXCEPTION_MARK;
940 #if !defined(ZERO) && !defined(SHARK)
941 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
942 #endif // !ZERO && !SHARK
943 if (c2_compiler_count > 0) {
944 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
945 }
946 if (c1_compiler_count > 0) {
947 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
948 }
949
950 int compiler_count = c1_compiler_count + c2_compiler_count;
951
952 _method_threads =
953 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
954
955 char name_buffer[256];
956 for (int i = 0; i < c2_compiler_count; i++) {
957 // Create a name for our thread.
958 sprintf(name_buffer, "C2 CompilerThread%d", i);
959 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
960 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
961 _method_threads->append(new_thread);
962 }
963
964 for (int i = c2_compiler_count; i < compiler_count; i++) {
965 // Create a name for our thread.
966 sprintf(name_buffer, "C1 CompilerThread%d", i);
967 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
968 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
969 _method_threads->append(new_thread);
970 }
971
972 if (UsePerfData) {
973 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
974 compiler_count, CHECK);
975 }
976 }
977
978 // ------------------------------------------------------------------
979 // CompileBroker::is_idle
980 bool CompileBroker::is_idle() {
981 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
982 return false;
983 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
984 return false;
985 } else {
986 int num_threads = _method_threads->length();
987 for (int i=0; i<num_threads; i++) {
988 if (_method_threads->at(i)->task() != NULL) {
989 return false;
990 }
991 }
992
993 // No pending or active compilations.
994 return true;
995 }
996 }
997
998
999 // ------------------------------------------------------------------
1000 // CompileBroker::compile_method
1001 //
1002 // Request compilation of a method.
1003 void CompileBroker::compile_method_base(methodHandle method,
1004 int osr_bci,
1005 int comp_level,
1006 methodHandle hot_method,
1007 int hot_count,
1008 const char* comment,
1009 Thread* thread) {
1010 // do nothing if compiler thread(s) is not available
1011 if (!_initialized ) {
1012 return;
1013 }
1014
1015 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1016 assert(method->method_holder()->klass_part()->oop_is_instance(),
1017 "sanity check");
1018 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
1019 "method holder must be initialized");
1020
1021 if (CIPrintRequests) {
1022 tty->print("request: ");
1023 method->print_short_name(tty);
1024 if (osr_bci != InvocationEntryBci) {
1025 tty->print(" osr_bci: %d", osr_bci);
1026 }
1027 tty->print(" comment: %s count: %d", comment, hot_count);
1028 if (!hot_method.is_null()) {
1029 tty->print(" hot: ");
1030 if (hot_method() != method()) {
1031 hot_method->print_short_name(tty);
1032 } else {
1033 tty->print("yes");
1034 }
1035 }
1036 tty->cr();
1037 }
1038
1039 // A request has been made for compilation. Before we do any
1040 // real work, check to see if the method has been compiled
1041 // in the meantime with a definitive result.
1042 if (compilation_is_complete(method, osr_bci, comp_level)) {
1043 return;
1044 }
1045
1046 #ifndef PRODUCT
1047 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1048 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1049 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1050 return;
1051 }
1052 }
1053 #endif
1054
1055 // If this method is already in the compile queue, then
1056 // we do not block the current thread.
1057 if (compilation_is_in_queue(method, osr_bci)) {
1058 // We may want to decay our counter a bit here to prevent
1059 // multiple denied requests for compilation. This is an
1060 // open compilation policy issue. Note: The other possibility,
1061 // in the case that this is a blocking compile request, is to have
1062 // all subsequent blocking requesters wait for completion of
1063 // ongoing compiles. Note that in this case we'll need a protocol
1064 // for freeing the associated compile tasks. [Or we could have
1065 // a single static monitor on which all these waiters sleep.]
1066 return;
1067 }
1068
1069 // If the requesting thread is holding the pending list lock
1070 // then we just return. We can't risk blocking while holding
1071 // the pending list lock or a 3-way deadlock may occur
1072 // between the reference handler thread, a GC (instigated
1073 // by a compiler thread), and compiled method registration.
1074 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1075 return;
1076 }
1077
1078 // Outputs from the following MutexLocker block:
1079 CompileTask* task = NULL;
1080 bool blocking = false;
1081 CompileQueue* queue = compile_queue(comp_level);
1082
1083 // Acquire our lock.
1084 {
1085 MutexLocker locker(queue->lock(), thread);
1086
1087 // Make sure the method has not slipped into the queues since
1088 // last we checked; note that those checks were "fast bail-outs".
1089 // Here we need to be more careful, see 14012000 below.
1090 if (compilation_is_in_queue(method, osr_bci)) {
1091 return;
1092 }
1093
1094 // We need to check again to see if the compilation has
1095 // completed. A previous compilation may have registered
1096 // some result.
1097 if (compilation_is_complete(method, osr_bci, comp_level)) {
1098 return;
1099 }
1100
1101 // We now know that this compilation is not pending, complete,
1102 // or prohibited. Assign a compile_id to this compilation
1103 // and check to see if it is in our [Start..Stop) range.
1104 uint compile_id = assign_compile_id(method, osr_bci);
1105 if (compile_id == 0) {
1106 // The compilation falls outside the allowed range.
1107 return;
1108 }
1109
1110 // Should this thread wait for completion of the compile?
1111 blocking = is_compile_blocking(method, osr_bci);
1112
1113 // We will enter the compilation in the queue.
1114 // 14012000: Note that this sets the queued_for_compile bits in
1115 // the target method. We can now reason that a method cannot be
1116 // queued for compilation more than once, as follows:
1117 // Before a thread queues a task for compilation, it first acquires
1118 // the compile queue lock, then checks if the method's queued bits
1119 // are set or it has already been compiled. Thus there can not be two
1120 // instances of a compilation task for the same method on the
1121 // compilation queue. Consider now the case where the compilation
1122 // thread has already removed a task for that method from the queue
1123 // and is in the midst of compiling it. In this case, the
1124 // queued_for_compile bits must be set in the method (and these
1125 // will be visible to the current thread, since the bits were set
1126 // under protection of the compile queue lock, which we hold now.
1127 // When the compilation completes, the compiler thread first sets
1128 // the compilation result and then clears the queued_for_compile
1129 // bits. Neither of these actions are protected by a barrier (or done
1130 // under the protection of a lock), so the only guarantee we have
1131 // (on machines with TSO (Total Store Order)) is that these values
1132 // will update in that order. As a result, the only combinations of
1133 // these bits that the current thread will see are, in temporal order:
1134 // <RESULT, QUEUE> :
1135 // <0, 1> : in compile queue, but not yet compiled
1136 // <1, 1> : compiled but queue bit not cleared
1137 // <1, 0> : compiled and queue bit cleared
1138 // Because we first check the queue bits then check the result bits,
1139 // we are assured that we cannot introduce a duplicate task.
1140 // Note that if we did the tests in the reverse order (i.e. check
1141 // result then check queued bit), we could get the result bit before
1142 // the compilation completed, and the queue bit after the compilation
1143 // completed, and end up introducing a "duplicate" (redundant) task.
1144 // In that case, the compiler thread should first check if a method
1145 // has already been compiled before trying to compile it.
1146 // NOTE: in the event that there are multiple compiler threads and
1147 // there is de-optimization/recompilation, things will get hairy,
1148 // and in that case it's best to protect both the testing (here) of
1149 // these bits, and their updating (here and elsewhere) under a
1150 // common lock.
1151 task = create_compile_task(queue,
1152 compile_id, method,
1153 osr_bci, comp_level,
1154 hot_method, hot_count, comment,
1155 blocking);
1156 }
1157
1158 if (blocking) {
1159 wait_for_completion(task);
1160 }
1161 }
1162
1163
1164 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1165 int comp_level,
1166 methodHandle hot_method, int hot_count,
1167 const char* comment, Thread* THREAD) {
1168 // make sure arguments make sense
1169 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method");
1170 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1171 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1172 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
1173
1174 if (!TieredCompilation) {
1175 comp_level = CompLevel_highest_tier;
1176 }
1177
1178 // return quickly if possible
1179
1180 // lock, make sure that the compilation
1181 // isn't prohibited in a straightforward way.
1182
1183 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
1184 return NULL;
1185 }
1186
1187 if (osr_bci == InvocationEntryBci) {
1188 // standard compilation
1189 nmethod* method_code = method->code();
1190 if (method_code != NULL) {
1191 if (compilation_is_complete(method, osr_bci, comp_level)) {
1192 return method_code;
1193 }
1194 }
1195 if (method->is_not_compilable(comp_level)) return NULL;
1196
1197 if (UseCodeCacheFlushing) {
1198 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1199 if (saved != NULL) {
1200 method->set_code(method, saved);
1201 return saved;
1202 }
1203 }
1204
1205 } else {
1206 // osr compilation
1207 #ifndef TIERED
1208 // seems like an assert of dubious value
1209 assert(comp_level == CompLevel_highest_tier,
1210 "all OSR compiles are assumed to be at a single compilation lavel");
1211 #endif // TIERED
1212 // We accept a higher level osr method
1213 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1214 if (nm != NULL) return nm;
1215 if (method->is_not_osr_compilable()) return NULL;
1216 }
1217
1218 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1219 // some prerequisites that are compiler specific
1220 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) {
1221 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1222 // Resolve all classes seen in the signature of the method
1223 // we are compiling.
1224 methodOopDesc::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1225 }
1226
1227 // If the method is native, do the lookup in the thread requesting
1228 // the compilation. Native lookups can load code, which is not
1229 // permitted during compilation.
1230 //
1231 // Note: A native method implies non-osr compilation which is
1232 // checked with an assertion at the entry of this method.
1233 if (method->is_native()) {
1234 bool in_base_library;
1235 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1236 if (HAS_PENDING_EXCEPTION) {
1237 // In case of an exception looking up the method, we just forget
1238 // about it. The interpreter will kick-in and throw the exception.
1239 method->set_not_compilable(); // implies is_not_osr_compilable()
1240 CLEAR_PENDING_EXCEPTION;
1241 return NULL;
1242 }
1243 assert(method->has_native_function(), "must have native code by now");
1244 }
1245
1246 // RedefineClasses() has replaced this method; just return
1247 if (method->is_old()) {
1248 return NULL;
1249 }
1250
1251 // JVMTI -- post_compile_event requires jmethod_id() that may require
1252 // a lock the compiling thread can not acquire. Prefetch it here.
1253 if (JvmtiExport::should_post_compiled_method_load()) {
1254 method->jmethod_id();
1255 }
1256
1257 // If the compiler is shut off due to code cache flushing or otherwise,
1258 // fail out now so blocking compiles dont hang the java thread
1259 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1260 CompilationPolicy::policy()->delay_compilation(method());
1261 return NULL;
1262 }
1263
1264 // do the compilation
1265 if (method->is_native()) {
1266 if (!PreferInterpreterNativeStubs) {
1267 // Acquire our lock.
1268 int compile_id;
1269 {
1270 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1271 compile_id = assign_compile_id(method, standard_entry_bci);
1272 }
1273 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1274 } else {
1275 return NULL;
1276 }
1277 } else {
1278 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1279 }
1280
1281 // return requested nmethod
1282 // We accept a higher level osr method
1283 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1284 }
1285
1286
1287 // ------------------------------------------------------------------
1288 // CompileBroker::compilation_is_complete
1289 //
1290 // See if compilation of this method is already complete.
1291 bool CompileBroker::compilation_is_complete(methodHandle method,
1292 int osr_bci,
1293 int comp_level) {
1294 bool is_osr = (osr_bci != standard_entry_bci);
1295 if (is_osr) {
1296 if (method->is_not_osr_compilable()) {
1297 return true;
1298 } else {
1299 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1300 return (result != NULL);
1301 }
1302 } else {
1303 if (method->is_not_compilable(comp_level)) {
1304 return true;
1305 } else {
1306 nmethod* result = method->code();
1307 if (result == NULL) return false;
1308 return comp_level == result->comp_level();
1309 }
1310 }
1311 }
1312
1313
1314 // ------------------------------------------------------------------
1315 // CompileBroker::compilation_is_in_queue
1316 //
1317 // See if this compilation is already requested.
1318 //
1319 // Implementation note: there is only a single "is in queue" bit
1320 // for each method. This means that the check below is overly
1321 // conservative in the sense that an osr compilation in the queue
1322 // will block a normal compilation from entering the queue (and vice
1323 // versa). This can be remedied by a full queue search to disambiguate
1324 // cases. If it is deemed profitible, this may be done.
1325 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1326 int osr_bci) {
1327 return method->queued_for_compilation();
1328 }
1329
1330 // ------------------------------------------------------------------
1331 // CompileBroker::compilation_is_prohibited
1332 //
1333 // See if this compilation is not allowed.
1334 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1335 bool is_native = method->is_native();
1336 // Some compilers may not support the compilation of natives.
1337 if (is_native &&
1338 (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1339 method->set_not_compilable_quietly(comp_level);
1340 return true;
1341 }
1342
1343 bool is_osr = (osr_bci != standard_entry_bci);
1344 // Some compilers may not support on stack replacement.
1345 if (is_osr &&
1346 (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1347 method->set_not_osr_compilable();
1348 return true;
1349 }
1350
1351 // The method may be explicitly excluded by the user.
1352 bool quietly;
1353 if (CompilerOracle::should_exclude(method, quietly)) {
1354 if (!quietly) {
1355 // This does not happen quietly...
1356 ResourceMark rm;
1357 tty->print("### Excluding %s:%s",
1358 method->is_native() ? "generation of native wrapper" : "compile",
1359 (method->is_static() ? " static" : ""));
1360 method->print_short_name(tty);
1361 tty->cr();
1362 }
1363 method->set_not_compilable_quietly();
1364 }
1365
1366 return false;
1367 }
1368
1369
1370 // ------------------------------------------------------------------
1371 // CompileBroker::assign_compile_id
1372 //
1373 // Assign a serialized id number to this compilation request. If the
1374 // number falls out of the allowed range, return a 0. OSR
1375 // compilations may be numbered separately from regular compilations
1376 // if certain debugging flags are used.
1377 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1378 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1379 "must hold the compilation queue lock");
1380 bool is_osr = (osr_bci != standard_entry_bci);
1381 uint id;
1382 if (CICountOSR && is_osr) {
1383 id = ++_osr_compilation_id;
1384 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1385 return id;
1386 }
1387 } else {
1388 id = ++_compilation_id;
1389 if ((uint)CIStart <= id && id < (uint)CIStop) {
1390 return id;
1391 }
1392 }
1393
1394 // Method was not in the appropriate compilation range.
1395 method->set_not_compilable_quietly();
1396 return 0;
1397 }
1398
1399
1400 // ------------------------------------------------------------------
1401 // CompileBroker::is_compile_blocking
1402 //
1403 // Should the current thread be blocked until this compilation request
1404 // has been fulfilled?
1405 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1406 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1407 return !BackgroundCompilation;
1408 }
1409
1410
1411 // ------------------------------------------------------------------
1412 // CompileBroker::preload_classes
1413 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1414 // Move this code over from c1_Compiler.cpp
1415 ShouldNotReachHere();
1416 }
1417
1418
1419 // ------------------------------------------------------------------
1420 // CompileBroker::create_compile_task
1421 //
1422 // Create a CompileTask object representing the current request for
1423 // compilation. Add this task to the queue.
1424 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1425 int compile_id,
1426 methodHandle method,
1427 int osr_bci,
1428 int comp_level,
1429 methodHandle hot_method,
1430 int hot_count,
1431 const char* comment,
1432 bool blocking) {
1433 CompileTask* new_task = allocate_task();
1434 new_task->initialize(compile_id, method, osr_bci, comp_level,
1435 hot_method, hot_count, comment,
1436 blocking);
1437 queue->add(new_task);
1438 return new_task;
1439 }
1440
1441
1442 // ------------------------------------------------------------------
1443 // CompileBroker::allocate_task
1444 //
1445 // Allocate a CompileTask, from the free list if possible.
1446 CompileTask* CompileBroker::allocate_task() {
1447 MutexLocker locker(CompileTaskAlloc_lock);
1448 CompileTask* task = NULL;
1449 if (_task_free_list != NULL) {
1450 task = _task_free_list;
1451 _task_free_list = task->next();
1452 task->set_next(NULL);
1453 } else {
1454 task = new CompileTask();
1455 task->set_next(NULL);
1456 }
1457 return task;
1458 }
1459
1460
1461 // ------------------------------------------------------------------
1462 // CompileBroker::free_task
1463 //
1464 // Add a task to the free list.
1465 void CompileBroker::free_task(CompileTask* task) {
1466 MutexLocker locker(CompileTaskAlloc_lock);
1467 task->free();
1468 task->set_next(_task_free_list);
1469 _task_free_list = task;
1470 }
1471
1472
1473 // ------------------------------------------------------------------
1474 // CompileBroker::wait_for_completion
1475 //
1476 // Wait for the given method CompileTask to complete.
1477 void CompileBroker::wait_for_completion(CompileTask* task) {
1478 if (CIPrintCompileQueue) {
1479 tty->print_cr("BLOCKING FOR COMPILE");
1480 }
1481
1482 assert(task->is_blocking(), "can only wait on blocking task");
1483
1484 JavaThread *thread = JavaThread::current();
1485 thread->set_blocked_on_compilation(true);
1486
1487 methodHandle method(thread,
1488 (methodOop)JNIHandles::resolve(task->method_handle()));
1489 {
1490 MutexLocker waiter(task->lock(), thread);
1491
1492 while (!task->is_complete())
1493 task->lock()->wait();
1494 }
1495 // It is harmless to check this status without the lock, because
1496 // completion is a stable property (until the task object is recycled).
1497 assert(task->is_complete(), "Compilation should have completed");
1498 assert(task->code_handle() == NULL, "must be reset");
1499
1500 thread->set_blocked_on_compilation(false);
1501
1502 // By convention, the waiter is responsible for recycling a
1503 // blocking CompileTask. Since there is only one waiter ever
1504 // waiting on a CompileTask, we know that no one else will
1505 // be using this CompileTask; we can free it.
1506 free_task(task);
1507 }
1508
1509 // ------------------------------------------------------------------
1510 // CompileBroker::compiler_thread_loop
1511 //
1512 // The main loop run by a CompilerThread.
1513 void CompileBroker::compiler_thread_loop() {
1514 CompilerThread* thread = CompilerThread::current();
1515 CompileQueue* queue = thread->queue();
1516
1517 // For the thread that initializes the ciObjectFactory
1518 // this resource mark holds all the shared objects
1519 ResourceMark rm;
1520
1521 // First thread to get here will initialize the compiler interface
1522
1523 if (!ciObjectFactory::is_initialized()) {
1524 ASSERT_IN_VM;
1525 MutexLocker only_one (CompileThread_lock, thread);
1526 if (!ciObjectFactory::is_initialized()) {
1527 ciObjectFactory::initialize();
1528 }
1529 }
1530
1531 // Open a log.
1532 if (LogCompilation) {
1533 init_compiler_thread_log();
1534 }
1535 CompileLog* log = thread->log();
1536 if (log != NULL) {
1537 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1538 os::current_thread_id(),
1539 os::current_process_id());
1540 log->stamp();
1541 log->end_elem();
1542 }
1543
1544 while (true) {
1545 {
1546 // We need this HandleMark to avoid leaking VM handles.
1547 HandleMark hm(thread);
1548
1549 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) {
1550 // the code cache is really full
1551 handle_full_code_cache();
1552 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1553 // Attempt to start cleaning the code cache while there is still a little headroom
1554 NMethodSweeper::handle_full_code_cache(false);
1555 }
1556
1557 CompileTask* task = queue->get();
1558
1559 // Give compiler threads an extra quanta. They tend to be bursty and
1560 // this helps the compiler to finish up the job.
1561 if( CompilerThreadHintNoPreempt )
1562 os::hint_no_preempt();
1563
1564 // trace per thread time and compile statistics
1565 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1566 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1567
1568 // Assign the task to the current thread. Mark this compilation
1569 // thread as active for the profiler.
1570 CompileTaskWrapper ctw(task);
1571 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1572 task->set_code_handle(&result_handle);
1573 methodHandle method(thread,
1574 (methodOop)JNIHandles::resolve(task->method_handle()));
1575
1576 // Never compile a method if breakpoints are present in it
1577 if (method()->number_of_breakpoints() == 0) {
1578 // Compile the method.
1579 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1580 #ifdef COMPILER1
1581 // Allow repeating compilations for the purpose of benchmarking
1582 // compile speed. This is not useful for customers.
1583 if (CompilationRepeat != 0) {
1584 int compile_count = CompilationRepeat;
1585 while (compile_count > 0) {
1586 invoke_compiler_on_method(task);
1587 nmethod* nm = method->code();
1588 if (nm != NULL) {
1589 nm->make_zombie();
1590 method->clear_code();
1591 }
1592 compile_count--;
1593 }
1594 }
1595 #endif /* COMPILER1 */
1596 invoke_compiler_on_method(task);
1597 } else {
1598 // After compilation is disabled, remove remaining methods from queue
1599 method->clear_queued_for_compilation();
1600 }
1601 }
1602 }
1603 }
1604 }
1605
1606
1607 // ------------------------------------------------------------------
1608 // CompileBroker::init_compiler_thread_log
1609 //
1610 // Set up state required by +LogCompilation.
1611 void CompileBroker::init_compiler_thread_log() {
1612 CompilerThread* thread = CompilerThread::current();
1613 char fileBuf[4*K];
1614 FILE* fp = NULL;
1615 char* file = NULL;
1616 intx thread_id = os::current_thread_id();
1617 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1618 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1619 if (dir == NULL) {
1620 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1621 thread_id, os::current_process_id());
1622 } else {
1623 jio_snprintf(fileBuf, sizeof(fileBuf),
1624 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1625 os::file_separator(), thread_id, os::current_process_id());
1626 }
1627 fp = fopen(fileBuf, "at");
1628 if (fp != NULL) {
1629 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
1630 strcpy(file, fileBuf);
1631 break;
1632 }
1633 }
1634 if (fp == NULL) {
1635 warning("Cannot open log file: %s", fileBuf);
1636 } else {
1637 if (LogCompilation && Verbose)
1638 tty->print_cr("Opening compilation log %s", file);
1639 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
1640 thread->init_log(log);
1641
1642 if (xtty != NULL) {
1643 ttyLocker ttyl;
1644
1645 // Record any per thread log files
1646 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1647 }
1648 }
1649 }
1650
1651 // ------------------------------------------------------------------
1652 // CompileBroker::set_should_block
1653 //
1654 // Set _should_block.
1655 // Call this from the VM, with Threads_lock held and a safepoint requested.
1656 void CompileBroker::set_should_block() {
1657 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1658 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1659 #ifndef PRODUCT
1660 if (PrintCompilation && (Verbose || WizardMode))
1661 tty->print_cr("notifying compiler thread pool to block");
1662 #endif
1663 _should_block = true;
1664 }
1665
1666 // ------------------------------------------------------------------
1667 // CompileBroker::maybe_block
1668 //
1669 // Call this from the compiler at convenient points, to poll for _should_block.
1670 void CompileBroker::maybe_block() {
1671 if (_should_block) {
1672 #ifndef PRODUCT
1673 if (PrintCompilation && (Verbose || WizardMode))
1674 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1675 #endif
1676 ThreadInVMfromNative tivfn(JavaThread::current());
1677 }
1678 }
1679
1680
1681 // ------------------------------------------------------------------
1682 // CompileBroker::invoke_compiler_on_method
1683 //
1684 // Compile a method.
1685 //
1686 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1687 if (PrintCompilation) {
1688 ResourceMark rm;
1689 task->print_line();
1690 }
1691 elapsedTimer time;
1692
1693 CompilerThread* thread = CompilerThread::current();
1694 ResourceMark rm(thread);
1695
1696 if (LogEvents) {
1697 _compilation_log->log_compile(thread, task);
1698 }
1699
1700 // Common flags.
1701 uint compile_id = task->compile_id();
1702 int osr_bci = task->osr_bci();
1703 bool is_osr = (osr_bci != standard_entry_bci);
1704 bool should_log = (thread->log() != NULL);
1705 bool should_break = false;
1706 {
1707 // create the handle inside it's own block so it can't
1708 // accidentally be referenced once the thread transitions to
1709 // native. The NoHandleMark before the transition should catch
1710 // any cases where this occurs in the future.
1711 methodHandle method(thread,
1712 (methodOop)JNIHandles::resolve(task->method_handle()));
1713 should_break = check_break_at(method, compile_id, is_osr);
1714 if (should_log && !CompilerOracle::should_log(method)) {
1715 should_log = false;
1716 }
1717 assert(!method->is_native(), "no longer compile natives");
1718
1719 // Save information about this method in case of failure.
1720 set_last_compile(thread, method, is_osr, task->comp_level());
1721
1722 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1723 }
1724
1725 // Allocate a new set of JNI handles.
1726 push_jni_handle_block();
1727 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
1728 int compilable = ciEnv::MethodCompilable;
1729 {
1730 int system_dictionary_modification_counter;
1731 {
1732 MutexLocker locker(Compile_lock, thread);
1733 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1734 }
1735
1736 NoHandleMark nhm;
1737 ThreadToNativeFromVM ttn(thread);
1738
1739 ciEnv ci_env(task, system_dictionary_modification_counter);
1740 if (should_break) {
1741 ci_env.set_break_at_compile(true);
1742 }
1743 if (should_log) {
1744 ci_env.set_log(thread->log());
1745 }
1746 assert(thread->env() == &ci_env, "set by ci_env");
1747 // The thread-env() field is cleared in ~CompileTaskWrapper.
1748
1749 // Cache Jvmti state
1750 ci_env.cache_jvmti_state();
1751
1752 // Cache DTrace flags
1753 ci_env.cache_dtrace_flags();
1754
1755 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1756
1757 TraceTime t1("compilation", &time);
1758
1759 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1760
1761 if (!ci_env.failing() && task->code() == NULL) {
1762 //assert(false, "compiler should always document failure");
1763 // The compiler elected, without comment, not to register a result.
1764 // Do not attempt further compilations of this method.
1765 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1766 }
1767
1768 // Copy this bit to the enclosing block:
1769 compilable = ci_env.compilable();
1770
1771 if (ci_env.failing()) {
1772 const char* retry_message = ci_env.retry_message();
1773 if (_compilation_log != NULL) {
1774 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1775 }
1776 if (PrintCompilation) {
1777 tty->print("%4d COMPILE SKIPPED: %s", compile_id, ci_env.failure_reason());
1778 if (retry_message != NULL) {
1779 tty->print(" (%s)", retry_message);
1780 }
1781 tty->cr();
1782 }
1783 } else {
1784 task->mark_success();
1785 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1786 if (_compilation_log != NULL) {
1787 nmethod* code = task->code();
1788 if (code != NULL) {
1789 _compilation_log->log_nmethod(thread, code);
1790 }
1791 }
1792 }
1793 }
1794 pop_jni_handle_block();
1795
1796 methodHandle method(thread,
1797 (methodOop)JNIHandles::resolve(task->method_handle()));
1798
1799 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1800
1801 collect_statistics(thread, time, task);
1802
1803 if (PrintCompilation && PrintCompilation2) {
1804 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1805 tty->print("%4d ", compile_id); // print compilation number
1806 tty->print("%s ", (is_osr ? "%" : " "));
1807 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size();
1808 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes());
1809 }
1810
1811 if (compilable == ciEnv::MethodCompilable_never) {
1812 if (is_osr) {
1813 method->set_not_osr_compilable();
1814 } else {
1815 method->set_not_compilable_quietly();
1816 }
1817 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1818 method->set_not_compilable_quietly(task->comp_level());
1819 }
1820
1821 // Note that the queued_for_compilation bits are cleared without
1822 // protection of a mutex. [They were set by the requester thread,
1823 // when adding the task to the complie queue -- at which time the
1824 // compile queue lock was held. Subsequently, we acquired the compile
1825 // queue lock to get this task off the compile queue; thus (to belabour
1826 // the point somewhat) our clearing of the bits must be occurring
1827 // only after the setting of the bits. See also 14012000 above.
1828 method->clear_queued_for_compilation();
1829
1830 #ifdef ASSERT
1831 if (CollectedHeap::fired_fake_oom()) {
1832 // The current compile received a fake OOM during compilation so
1833 // go ahead and exit the VM since the test apparently succeeded
1834 tty->print_cr("*** Shutting down VM after successful fake OOM");
1835 vm_exit(0);
1836 }
1837 #endif
1838 }
1839
1840 // ------------------------------------------------------------------
1841 // CompileBroker::handle_full_code_cache
1842 //
1843 // The CodeCache is full. Print out warning and disable compilation or
1844 // try code cache cleaning so compilation can continue later.
1845 void CompileBroker::handle_full_code_cache() {
1846 UseInterpreter = true;
1847 if (UseCompiler || AlwaysCompileLoopMethods ) {
1848 if (xtty != NULL) {
1849 stringStream s;
1850 // Dump code cache state into a buffer before locking the tty,
1851 // because log_state() will use locks causing lock conflicts.
1852 CodeCache::log_state(&s);
1853 // Lock to prevent tearing
1854 ttyLocker ttyl;
1855 xtty->begin_elem("code_cache_full");
1856 xtty->print(s.as_string());
1857 xtty->stamp();
1858 xtty->end_elem();
1859 }
1860 warning("CodeCache is full. Compiler has been disabled.");
1861 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1862 CodeCache::print_bounds(tty);
1863 #ifndef PRODUCT
1864 if (CompileTheWorld || ExitOnFullCodeCache) {
1865 before_exit(JavaThread::current());
1866 exit_globals(); // will delete tty
1867 vm_direct_exit(CompileTheWorld ? 0 : 1);
1868 }
1869 #endif
1870 if (UseCodeCacheFlushing) {
1871 NMethodSweeper::handle_full_code_cache(true);
1872 } else {
1873 UseCompiler = false;
1874 AlwaysCompileLoopMethods = false;
1875 }
1876 }
1877 }
1878
1879 // ------------------------------------------------------------------
1880 // CompileBroker::set_last_compile
1881 //
1882 // Record this compilation for debugging purposes.
1883 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1884 ResourceMark rm;
1885 char* method_name = method->name()->as_C_string();
1886 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1887 char current_method[CompilerCounters::cmname_buffer_length];
1888 size_t maxLen = CompilerCounters::cmname_buffer_length;
1889
1890 if (UsePerfData) {
1891 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string();
1892
1893 size_t s1len = strlen(class_name);
1894 size_t s2len = strlen(method_name);
1895
1896 // check if we need to truncate the string
1897 if (s1len + s2len + 2 > maxLen) {
1898
1899 // the strategy is to lop off the leading characters of the
1900 // class name and the trailing characters of the method name.
1901
1902 if (s2len + 2 > maxLen) {
1903 // lop of the entire class name string, let snprintf handle
1904 // truncation of the method name.
1905 class_name += s1len; // null string
1906 }
1907 else {
1908 // lop off the extra characters from the front of the class name
1909 class_name += ((s1len + s2len + 2) - maxLen);
1910 }
1911 }
1912
1913 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1914 }
1915
1916 if (CICountOSR && is_osr) {
1917 _last_compile_type = osr_compile;
1918 } else {
1919 _last_compile_type = normal_compile;
1920 }
1921 _last_compile_level = comp_level;
1922
1923 if (UsePerfData) {
1924 CompilerCounters* counters = thread->counters();
1925 counters->set_current_method(current_method);
1926 counters->set_compile_type((jlong)_last_compile_type);
1927 }
1928 }
1929
1930
1931 // ------------------------------------------------------------------
1932 // CompileBroker::push_jni_handle_block
1933 //
1934 // Push on a new block of JNI handles.
1935 void CompileBroker::push_jni_handle_block() {
1936 JavaThread* thread = JavaThread::current();
1937
1938 // Allocate a new block for JNI handles.
1939 // Inlined code from jni_PushLocalFrame()
1940 JNIHandleBlock* java_handles = thread->active_handles();
1941 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1942 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1943 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1944 thread->set_active_handles(compile_handles);
1945 }
1946
1947
1948 // ------------------------------------------------------------------
1949 // CompileBroker::pop_jni_handle_block
1950 //
1951 // Pop off the current block of JNI handles.
1952 void CompileBroker::pop_jni_handle_block() {
1953 JavaThread* thread = JavaThread::current();
1954
1955 // Release our JNI handle block
1956 JNIHandleBlock* compile_handles = thread->active_handles();
1957 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1958 thread->set_active_handles(java_handles);
1959 compile_handles->set_pop_frame_link(NULL);
1960 JNIHandleBlock::release_block(compile_handles, thread); // may block
1961 }
1962
1963
1964 // ------------------------------------------------------------------
1965 // CompileBroker::check_break_at
1966 //
1967 // Should the compilation break at the current compilation.
1968 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
1969 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
1970 return true;
1971 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
1972 return true;
1973 } else {
1974 return (compile_id == CIBreakAt);
1975 }
1976 }
1977
1978 // ------------------------------------------------------------------
1979 // CompileBroker::collect_statistics
1980 //
1981 // Collect statistics about the compilation.
1982
1983 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1984 bool success = task->is_success();
1985 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle()));
1986 uint compile_id = task->compile_id();
1987 bool is_osr = (task->osr_bci() != standard_entry_bci);
1988 nmethod* code = task->code();
1989 CompilerCounters* counters = thread->counters();
1990
1991 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1992 MutexLocker locker(CompileStatistics_lock);
1993
1994 // _perf variables are production performance counters which are
1995 // updated regardless of the setting of the CITime and CITimeEach flags
1996 //
1997 if (!success) {
1998 _total_bailout_count++;
1999 if (UsePerfData) {
2000 _perf_last_failed_method->set_value(counters->current_method());
2001 _perf_last_failed_type->set_value(counters->compile_type());
2002 _perf_total_bailout_count->inc();
2003 }
2004 } else if (code == NULL) {
2005 if (UsePerfData) {
2006 _perf_last_invalidated_method->set_value(counters->current_method());
2007 _perf_last_invalidated_type->set_value(counters->compile_type());
2008 _perf_total_invalidated_count->inc();
2009 }
2010 _total_invalidated_count++;
2011 } else {
2012 // Compilation succeeded
2013
2014 // update compilation ticks - used by the implementation of
2015 // java.lang.management.CompilationMBean
2016 _perf_total_compilation->inc(time.ticks());
2017
2018 if (CITime) {
2019 _t_total_compilation.add(time);
2020 if (is_osr) {
2021 _t_osr_compilation.add(time);
2022 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2023 } else {
2024 _t_standard_compilation.add(time);
2025 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2026 }
2027 }
2028
2029 if (UsePerfData) {
2030 // save the name of the last method compiled
2031 _perf_last_method->set_value(counters->current_method());
2032 _perf_last_compile_type->set_value(counters->compile_type());
2033 _perf_last_compile_size->set_value(method->code_size() +
2034 task->num_inlined_bytecodes());
2035 if (is_osr) {
2036 _perf_osr_compilation->inc(time.ticks());
2037 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2038 } else {
2039 _perf_standard_compilation->inc(time.ticks());
2040 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2041 }
2042 }
2043
2044 if (CITimeEach) {
2045 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2046 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2047 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2048 }
2049
2050 // Collect counts of successful compilations
2051 _sum_nmethod_size += code->total_size();
2052 _sum_nmethod_code_size += code->insts_size();
2053 _total_compile_count++;
2054
2055 if (UsePerfData) {
2056 _perf_sum_nmethod_size->inc( code->total_size());
2057 _perf_sum_nmethod_code_size->inc(code->insts_size());
2058 _perf_total_compile_count->inc();
2059 }
2060
2061 if (is_osr) {
2062 if (UsePerfData) _perf_total_osr_compile_count->inc();
2063 _total_osr_compile_count++;
2064 } else {
2065 if (UsePerfData) _perf_total_standard_compile_count->inc();
2066 _total_standard_compile_count++;
2067 }
2068 }
2069 // set the current method for the thread to null
2070 if (UsePerfData) counters->set_current_method("");
2071 }
2072
2073
2074
2075 void CompileBroker::print_times() {
2076 tty->cr();
2077 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2078 tty->print_cr("------------------------------------------------");
2079 //0000000000111111111122222222223333333333444444444455555555556666666666
2080 //0123456789012345678901234567890123456789012345678901234567890123456789
2081 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2082 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2083 CompileBroker::_t_standard_compilation.seconds(),
2084 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2085 tty->print_cr(" On stack replacement : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count);
2086
2087 if (compiler(CompLevel_simple) != NULL) {
2088 compiler(CompLevel_simple)->print_timers();
2089 }
2090 if (compiler(CompLevel_full_optimization) != NULL) {
2091 compiler(CompLevel_full_optimization)->print_timers();
2092 }
2093 tty->cr();
2094 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2095 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2096 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2097 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2098 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2099 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2100 tty->cr();
2101 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2102 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2103 }
2104
2105
2106 // Debugging output for failure
2107 void CompileBroker::print_last_compile() {
2108 if ( _last_compile_level != CompLevel_none &&
2109 compiler(_last_compile_level) != NULL &&
2110 _last_method_compiled != NULL &&
2111 _last_compile_type != no_compile) {
2112 if (_last_compile_type == osr_compile) {
2113 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2114 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2115 } else {
2116 tty->print_cr("Last parse: %d+++(%d) %s",
2117 _compilation_id, _last_compile_level, _last_method_compiled);
2118 }
2119 }
2120 }
2121
2122
2123 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2124 #ifndef PRODUCT
2125 st->print_cr("Compiler thread printing unimplemented.");
2126 st->cr();
2127 #endif
2128 }