1 /*
2 * Copyright (c) 1999, 2013, 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/methodData.hpp"
35 #include "oops/method.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 "trace/tracing.hpp"
47 #include "utilities/dtrace.hpp"
48 #include "utilities/events.hpp"
49 #ifdef COMPILER1
50 #include "c1/c1_Compiler.hpp"
51 #endif
52 #ifdef COMPILER2
53 #include "opto/c2compiler.hpp"
54 #endif
55 #ifdef SHARK
56 #include "shark/sharkCompiler.hpp"
57 #endif
58
59 #ifdef DTRACE_ENABLED
60
61 // Only bother with this argument setup if dtrace is available
62
63 #ifndef USDT2
64 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
65 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
66 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
67 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
68
69 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
70 { \
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(method, comp_name, success) \
82 { \
83 Symbol* klass_name = (method)->klass_name(); \
84 Symbol* name = (method)->name(); \
85 Symbol* signature = (method)->signature(); \
86 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
87 comp_name, strlen(comp_name), \
88 klass_name->bytes(), klass_name->utf8_length(), \
89 name->bytes(), name->utf8_length(), \
90 signature->bytes(), signature->utf8_length(), (success)); \
91 }
92
93 #else /* USDT2 */
94
95 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_BEGIN( \
101 comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length()); \
105 }
106
107 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
108 { \
109 Symbol* klass_name = (method)->klass_name(); \
110 Symbol* name = (method)->name(); \
111 Symbol* signature = (method)->signature(); \
112 HOTSPOT_METHOD_COMPILE_END( \
113 comp_name, strlen(comp_name), \
114 (char *) klass_name->bytes(), klass_name->utf8_length(), \
115 (char *) name->bytes(), name->utf8_length(), \
116 (char *) signature->bytes(), signature->utf8_length(), (success)); \
117 }
118 #endif /* USDT2 */
119
120 #else // ndef DTRACE_ENABLED
121
122 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
123 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
124
125 #endif // ndef DTRACE_ENABLED
126
127 bool CompileBroker::_initialized = false;
128 volatile bool CompileBroker::_should_block = false;
129 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
130
131 // The installed compiler(s)
132 AbstractCompiler* CompileBroker::_compilers[2];
133
134 // These counters are used for assigning id's to each compilation
135 uint CompileBroker::_compilation_id = 0;
136 uint CompileBroker::_osr_compilation_id = 0;
137
138 // Debugging information
139 int CompileBroker::_last_compile_type = no_compile;
140 int CompileBroker::_last_compile_level = CompLevel_none;
141 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
142
143 // Performance counters
144 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
146 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
147
148 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
153
154 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
157 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
158
159 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
161 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
163 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
164 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
165 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
166
167 // Timers and counters for generating statistics
168 elapsedTimer CompileBroker::_t_total_compilation;
169 elapsedTimer CompileBroker::_t_osr_compilation;
170 elapsedTimer CompileBroker::_t_standard_compilation;
171
172 int CompileBroker::_total_bailout_count = 0;
173 int CompileBroker::_total_invalidated_count = 0;
174 int CompileBroker::_total_compile_count = 0;
175 int CompileBroker::_total_osr_compile_count = 0;
176 int CompileBroker::_total_standard_compile_count = 0;
177
178 int CompileBroker::_sum_osr_bytes_compiled = 0;
179 int CompileBroker::_sum_standard_bytes_compiled = 0;
180 int CompileBroker::_sum_nmethod_size = 0;
181 int CompileBroker::_sum_nmethod_code_size = 0;
182
183 long CompileBroker::_peak_compilation_time = 0;
184
185 CompileQueue* CompileBroker::_c2_method_queue = NULL;
186 CompileQueue* CompileBroker::_c1_method_queue = NULL;
187 CompileTask* CompileBroker::_task_free_list = NULL;
188
189 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
190
191
192 class CompilationLog : public StringEventLog {
193 public:
194 CompilationLog() : StringEventLog("Compilation events") {
195 }
196
197 void log_compile(JavaThread* thread, CompileTask* task) {
198 StringLogMessage lm;
199 stringStream sstr = lm.stream();
200 // msg.time_stamp().update_to(tty->time_stamp().ticks());
201 task->print_compilation(&sstr, NULL, true);
202 log(thread, "%s", (const char*)lm);
203 }
204
205 void log_nmethod(JavaThread* thread, nmethod* nm) {
206 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
207 nm->compile_id(), nm->is_osr_method() ? "%" : "",
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 thread->set_env(NULL);
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 = method();
274 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
275 _osr_bci = osr_bci;
276 _is_blocking = is_blocking;
277 _comp_level = comp_level;
278 _num_inlined_bytecodes = 0;
279
280 _is_complete = false;
281 _is_success = false;
282 _code_handle = NULL;
283
284 _hot_method = NULL;
285 _hot_method_holder = NULL;
286 _hot_count = hot_count;
287 _time_queued = 0; // tidy
288 _comment = comment;
289
290 if (LogCompilation) {
291 _time_queued = os::elapsed_counter();
292 if (hot_method.not_null()) {
293 if (hot_method == method) {
294 _hot_method = _method;
295 } else {
296 _hot_method = hot_method();
297 // only add loader or mirror if different from _method_holder
298 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
299 }
300 }
301 }
302
303 _next = NULL;
304 }
305
306 // ------------------------------------------------------------------
307 // CompileTask::code/set_code
308 nmethod* CompileTask::code() const {
309 if (_code_handle == NULL) return NULL;
310 return _code_handle->code();
311 }
312 void CompileTask::set_code(nmethod* nm) {
313 if (_code_handle == NULL && nm == NULL) return;
314 guarantee(_code_handle != NULL, "");
315 _code_handle->set_code(nm);
316 if (nm == NULL) _code_handle = NULL; // drop the handle also
317 }
318
319 // ------------------------------------------------------------------
320 // CompileTask::free
321 void CompileTask::free() {
322 set_code(NULL);
323 assert(!_lock->is_locked(), "Should not be locked when freed");
324 JNIHandles::destroy_global(_method_holder);
325 JNIHandles::destroy_global(_hot_method_holder);
326 }
327
328
329 void CompileTask::mark_on_stack() {
330 // Mark these methods as something redefine classes cannot remove.
331 _method->set_on_stack(true);
332 if (_hot_method != NULL) {
333 _hot_method->set_on_stack(true);
334 }
335 }
336
337 // ------------------------------------------------------------------
338 // CompileTask::print
339 void CompileTask::print() {
340 tty->print("<CompileTask compile_id=%d ", _compile_id);
341 tty->print("method=");
342 _method->print_name(tty);
343 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
344 _osr_bci, bool_to_str(_is_blocking),
345 bool_to_str(_is_complete), bool_to_str(_is_success));
346 }
347
348
349 // ------------------------------------------------------------------
350 // CompileTask::print_line_on_error
351 //
352 // This function is called by fatal error handler when the thread
353 // causing troubles is a compiler thread.
354 //
355 // Do not grab any lock, do not allocate memory.
356 //
357 // Otherwise it's the same as CompileTask::print_line()
358 //
359 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
360 // print compiler name
361 st->print("%s:", CompileBroker::compiler_name(comp_level()));
362 print_compilation(st);
363 }
364
365 // ------------------------------------------------------------------
366 // CompileTask::print_line
367 void CompileTask::print_line() {
368 ttyLocker ttyl; // keep the following output all in one block
369 // print compiler name if requested
370 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
371 print_compilation();
372 }
373
374
375 // ------------------------------------------------------------------
376 // CompileTask::print_compilation_impl
377 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
378 bool is_osr_method, int osr_bci, bool is_blocking,
379 const char* msg, bool short_form) {
380 if (!short_form) {
381 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
382 }
383 st->print("%4d ", compile_id); // print compilation number
384
385 // For unloaded methods the transition to zombie occurs after the
386 // method is cleared so it's impossible to report accurate
387 // information for that case.
388 bool is_synchronized = false;
389 bool has_exception_handler = false;
390 bool is_native = false;
391 if (method != NULL) {
392 is_synchronized = method->is_synchronized();
393 has_exception_handler = method->has_exception_handler();
394 is_native = method->is_native();
395 }
396 // method attributes
397 const char compile_type = is_osr_method ? '%' : ' ';
398 const char sync_char = is_synchronized ? 's' : ' ';
399 const char exception_char = has_exception_handler ? '!' : ' ';
400 const char blocking_char = is_blocking ? 'b' : ' ';
401 const char native_char = is_native ? 'n' : ' ';
402
403 // print method attributes
404 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
405
406 if (TieredCompilation) {
407 if (comp_level != -1) st->print("%d ", comp_level);
408 else st->print("- ");
409 }
410 st->print(" "); // more indent
411
412 if (method == NULL) {
413 st->print("(method)");
414 } else {
415 method->print_short_name(st);
416 if (is_osr_method) {
417 st->print(" @ %d", osr_bci);
418 }
419 if (method->is_native())
420 st->print(" (native)");
421 else
422 st->print(" (%d bytes)", method->code_size());
423 }
424
425 if (msg != NULL) {
426 st->print(" %s", msg);
427 }
428 if (!short_form) {
429 st->cr();
430 }
431 }
432
433 // ------------------------------------------------------------------
434 // CompileTask::print_inlining
435 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
436 // 1234567
437 st->print(" "); // print timestamp
438 // 1234
439 st->print(" "); // print compilation number
440
441 // method attributes
442 if (method->is_loaded()) {
443 const char sync_char = method->is_synchronized() ? 's' : ' ';
444 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
445 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
446
447 // print method attributes
448 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
449 } else {
450 // %s!bn
451 st->print(" "); // print method attributes
452 }
453
454 if (TieredCompilation) {
455 st->print(" ");
456 }
457 st->print(" "); // more indent
458 st->print(" "); // initial inlining indent
459
460 for (int i = 0; i < inline_level; i++) st->print(" ");
461
462 st->print("@ %d ", bci); // print bci
463 method->print_short_name(st);
464 if (method->is_loaded())
465 st->print(" (%d bytes)", method->code_size());
466 else
467 st->print(" (not loaded)");
468
469 if (msg != NULL) {
470 st->print(" %s", msg);
471 }
472 st->cr();
473 }
474
475 // ------------------------------------------------------------------
476 // CompileTask::print_inline_indent
477 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
478 // 1234567
479 st->print(" "); // print timestamp
480 // 1234
481 st->print(" "); // print compilation number
482 // %s!bn
483 st->print(" "); // print method attributes
484 if (TieredCompilation) {
485 st->print(" ");
486 }
487 st->print(" "); // more indent
488 st->print(" "); // initial inlining indent
489 for (int i = 0; i < inline_level; i++) st->print(" ");
490 }
491
492 // ------------------------------------------------------------------
493 // CompileTask::print_compilation
494 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
495 bool is_osr_method = osr_bci() != InvocationEntryBci;
496 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
497 }
498
499 // ------------------------------------------------------------------
500 // CompileTask::log_task
501 void CompileTask::log_task(xmlStream* log) {
502 Thread* thread = Thread::current();
503 methodHandle method(thread, this->method());
504 ResourceMark rm(thread);
505
506 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
507 log->print(" compile_id='%d'", _compile_id);
508 if (_osr_bci != CompileBroker::standard_entry_bci) {
509 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
510 } // else compile_kind='c2c'
511 if (!method.is_null()) log->method(method);
512 if (_osr_bci != CompileBroker::standard_entry_bci) {
513 log->print(" osr_bci='%d'", _osr_bci);
514 }
515 if (_comp_level != CompLevel_highest_tier) {
516 log->print(" level='%d'", _comp_level);
517 }
518 if (_is_blocking) {
519 log->print(" blocking='1'");
520 }
521 log->stamp();
522 }
523
524
525 // ------------------------------------------------------------------
526 // CompileTask::log_task_queued
527 void CompileTask::log_task_queued() {
528 Thread* thread = Thread::current();
529 ttyLocker ttyl;
530 ResourceMark rm(thread);
531
532 xtty->begin_elem("task_queued");
533 log_task(xtty);
534 if (_comment != NULL) {
535 xtty->print(" comment='%s'", _comment);
536 }
537 if (_hot_method != NULL) {
538 methodHandle hot(thread, _hot_method);
539 methodHandle method(thread, _method);
540 if (hot() != method()) {
541 xtty->method(hot);
542 }
543 }
544 if (_hot_count != 0) {
545 xtty->print(" hot_count='%d'", _hot_count);
546 }
547 xtty->end_elem();
548 }
549
550
551 // ------------------------------------------------------------------
552 // CompileTask::log_task_start
553 void CompileTask::log_task_start(CompileLog* log) {
554 log->begin_head("task");
555 log_task(log);
556 log->end_head();
557 }
558
559
560 // ------------------------------------------------------------------
561 // CompileTask::log_task_done
562 void CompileTask::log_task_done(CompileLog* log) {
563 Thread* thread = Thread::current();
564 methodHandle method(thread, this->method());
565 ResourceMark rm(thread);
566
567 // <task_done ... stamp='1.234'> </task>
568 nmethod* nm = code();
569 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
570 _is_success, nm == NULL ? 0 : nm->content_size(),
571 method->invocation_count());
572 int bec = method->backedge_count();
573 if (bec != 0) log->print(" backedge_count='%d'", bec);
574 // Note: "_is_complete" is about to be set, but is not.
575 if (_num_inlined_bytecodes != 0) {
576 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
577 }
578 log->stamp();
579 log->end_elem();
580 log->tail("task");
581 log->clear_identities(); // next task will have different CI
582 if (log->unflushed_count() > 2000) {
583 log->flush();
584 }
585 log->mark_file_end();
586 }
587
588
589
590 // ------------------------------------------------------------------
591 // CompileQueue::add
592 //
593 // Add a CompileTask to a CompileQueue
594 void CompileQueue::add(CompileTask* task) {
595 assert(lock()->owned_by_self(), "must own lock");
596
597 task->set_next(NULL);
598 task->set_prev(NULL);
599
600 if (_last == NULL) {
601 // The compile queue is empty.
602 assert(_first == NULL, "queue is empty");
603 _first = task;
604 _last = task;
605 } else {
606 // Append the task to the queue.
607 assert(_last->next() == NULL, "not last");
608 _last->set_next(task);
609 task->set_prev(_last);
610 _last = task;
611 }
612 ++_size;
613
614 // Mark the method as being in the compile queue.
615 task->method()->set_queued_for_compilation();
616
617 if (CIPrintCompileQueue) {
618 print();
619 }
620
621 if (LogCompilation && xtty != NULL) {
622 task->log_task_queued();
623 }
624
625 // Notify CompilerThreads that a task is available.
626 lock()->notify_all();
627 }
628
629 // ------------------------------------------------------------------
630 // CompileQueue::get
631 //
632 // Get the next CompileTask from a CompileQueue
633 CompileTask* CompileQueue::get() {
634 NMethodSweeper::possibly_sweep();
635
636 MutexLocker locker(lock());
637 // Wait for an available CompileTask.
638 while (_first == NULL) {
639 // There is no work to be done right now. Wait.
640 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
641 // During the emergency sweeping periods, wake up and sweep occasionally
642 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
643 if (timedout) {
644 MutexUnlocker ul(lock());
645 // When otherwise not busy, run nmethod sweeping
646 NMethodSweeper::possibly_sweep();
647 }
648 } else {
649 // During normal operation no need to wake up on timer
650 lock()->wait();
651 }
652 }
653 CompileTask* task = CompilationPolicy::policy()->select_task(this);
654 remove(task);
655 return task;
656 }
657
658 void CompileQueue::remove(CompileTask* task)
659 {
660 assert(lock()->owned_by_self(), "must own lock");
661 if (task->prev() != NULL) {
662 task->prev()->set_next(task->next());
663 } else {
664 // max is the first element
665 assert(task == _first, "Sanity");
666 _first = task->next();
667 }
668
669 if (task->next() != NULL) {
670 task->next()->set_prev(task->prev());
671 } else {
672 // max is the last element
673 assert(task == _last, "Sanity");
674 _last = task->prev();
675 }
676 --_size;
677 }
678
679 // methods in the compile queue need to be marked as used on the stack
680 // so that they don't get reclaimed by Redefine Classes
681 void CompileQueue::mark_on_stack() {
682 CompileTask* task = _first;
683 while (task != NULL) {
684 task->mark_on_stack();
685 task = task->next();
686 }
687 }
688
689 // ------------------------------------------------------------------
690 // CompileQueue::print
691 void CompileQueue::print() {
692 tty->print_cr("Contents of %s", name());
693 tty->print_cr("----------------------");
694 CompileTask* task = _first;
695 while (task != NULL) {
696 task->print_line();
697 task = task->next();
698 }
699 tty->print_cr("----------------------");
700 }
701
702 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
703
704 _current_method[0] = '\0';
705 _compile_type = CompileBroker::no_compile;
706
707 if (UsePerfData) {
708 ResourceMark rm;
709
710 // create the thread instance name space string - don't create an
711 // instance subspace if instance is -1 - keeps the adapterThread
712 // counters from having a ".0" namespace.
713 const char* thread_i = (instance == -1) ? thread_name :
714 PerfDataManager::name_space(thread_name, instance);
715
716
717 char* name = PerfDataManager::counter_name(thread_i, "method");
718 _perf_current_method =
719 PerfDataManager::create_string_variable(SUN_CI, name,
720 cmname_buffer_length,
721 _current_method, CHECK);
722
723 name = PerfDataManager::counter_name(thread_i, "type");
724 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
725 PerfData::U_None,
726 (jlong)_compile_type,
727 CHECK);
728
729 name = PerfDataManager::counter_name(thread_i, "time");
730 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
731 PerfData::U_Ticks, CHECK);
732
733 name = PerfDataManager::counter_name(thread_i, "compiles");
734 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
735 PerfData::U_Events, CHECK);
736 }
737 }
738
739 // ------------------------------------------------------------------
740 // CompileBroker::compilation_init
741 //
742 // Initialize the Compilation object
743 void CompileBroker::compilation_init() {
744 _last_method_compiled[0] = '\0';
745
746 #ifndef SHARK
747 // Set the interface to the current compiler(s).
748 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
749 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
750 #ifdef COMPILER1
751 if (c1_count > 0) {
752 _compilers[0] = new Compiler();
753 }
754 #endif // COMPILER1
755
756 #ifdef COMPILER2
757 if (c2_count > 0) {
758 _compilers[1] = new C2Compiler();
759 }
760 #endif // COMPILER2
761
762 #else // SHARK
763 int c1_count = 0;
764 int c2_count = 1;
765
766 _compilers[1] = new SharkCompiler();
767 #endif // SHARK
768
769 // Initialize the CompileTask free list
770 _task_free_list = NULL;
771
772 // Start the CompilerThreads
773 init_compiler_threads(c1_count, c2_count);
774 // totalTime performance counter is always created as it is required
775 // by the implementation of java.lang.management.CompilationMBean.
776 {
777 EXCEPTION_MARK;
778 _perf_total_compilation =
779 PerfDataManager::create_counter(JAVA_CI, "totalTime",
780 PerfData::U_Ticks, CHECK);
781 }
782
783
784 if (UsePerfData) {
785
786 EXCEPTION_MARK;
787
788 // create the jvmstat performance counters
789 _perf_osr_compilation =
790 PerfDataManager::create_counter(SUN_CI, "osrTime",
791 PerfData::U_Ticks, CHECK);
792
793 _perf_standard_compilation =
794 PerfDataManager::create_counter(SUN_CI, "standardTime",
795 PerfData::U_Ticks, CHECK);
796
797 _perf_total_bailout_count =
798 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
799 PerfData::U_Events, CHECK);
800
801 _perf_total_invalidated_count =
802 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
803 PerfData::U_Events, CHECK);
804
805 _perf_total_compile_count =
806 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
807 PerfData::U_Events, CHECK);
808 _perf_total_osr_compile_count =
809 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
810 PerfData::U_Events, CHECK);
811
812 _perf_total_standard_compile_count =
813 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
814 PerfData::U_Events, CHECK);
815
816 _perf_sum_osr_bytes_compiled =
817 PerfDataManager::create_counter(SUN_CI, "osrBytes",
818 PerfData::U_Bytes, CHECK);
819
820 _perf_sum_standard_bytes_compiled =
821 PerfDataManager::create_counter(SUN_CI, "standardBytes",
822 PerfData::U_Bytes, CHECK);
823
824 _perf_sum_nmethod_size =
825 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
826 PerfData::U_Bytes, CHECK);
827
828 _perf_sum_nmethod_code_size =
829 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
830 PerfData::U_Bytes, CHECK);
831
832 _perf_last_method =
833 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
834 CompilerCounters::cmname_buffer_length,
835 "", CHECK);
836
837 _perf_last_failed_method =
838 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
839 CompilerCounters::cmname_buffer_length,
840 "", CHECK);
841
842 _perf_last_invalidated_method =
843 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
844 CompilerCounters::cmname_buffer_length,
845 "", CHECK);
846
847 _perf_last_compile_type =
848 PerfDataManager::create_variable(SUN_CI, "lastType",
849 PerfData::U_None,
850 (jlong)CompileBroker::no_compile,
851 CHECK);
852
853 _perf_last_compile_size =
854 PerfDataManager::create_variable(SUN_CI, "lastSize",
855 PerfData::U_Bytes,
856 (jlong)CompileBroker::no_compile,
857 CHECK);
858
859
860 _perf_last_failed_type =
861 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
862 PerfData::U_None,
863 (jlong)CompileBroker::no_compile,
864 CHECK);
865
866 _perf_last_invalidated_type =
867 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
868 PerfData::U_None,
869 (jlong)CompileBroker::no_compile,
870 CHECK);
871 }
872
873 _initialized = true;
874 }
875
876
877
878 // ------------------------------------------------------------------
879 // CompileBroker::make_compiler_thread
880 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
881 CompilerThread* compiler_thread = NULL;
882
883 Klass* k =
884 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
885 true, CHECK_0);
886 instanceKlassHandle klass (THREAD, k);
887 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
888 Handle string = java_lang_String::create_from_str(name, CHECK_0);
889
890 // Initialize thread_oop to put it into the system threadGroup
891 Handle thread_group (THREAD, Universe::system_thread_group());
892 JavaValue result(T_VOID);
893 JavaCalls::call_special(&result, thread_oop,
894 klass,
895 vmSymbols::object_initializer_name(),
896 vmSymbols::threadgroup_string_void_signature(),
897 thread_group,
898 string,
899 CHECK_0);
900
901 {
902 MutexLocker mu(Threads_lock, THREAD);
903 compiler_thread = new CompilerThread(queue, counters);
904 // At this point the new CompilerThread data-races with this startup
905 // thread (which I believe is the primoridal thread and NOT the VM
906 // thread). This means Java bytecodes being executed at startup can
907 // queue compile jobs which will run at whatever default priority the
908 // newly created CompilerThread runs at.
909
910
911 // At this point it may be possible that no osthread was created for the
912 // JavaThread due to lack of memory. We would have to throw an exception
913 // in that case. However, since this must work and we do not allow
914 // exceptions anyway, check and abort if this fails.
915
916 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
917 vm_exit_during_initialization("java.lang.OutOfMemoryError",
918 "unable to create new native thread");
919 }
920
921 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
922
923 // Note that this only sets the JavaThread _priority field, which by
924 // definition is limited to Java priorities and not OS priorities.
925 // The os-priority is set in the CompilerThread startup code itself
926
927 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
928
929 // Note that we cannot call os::set_priority because it expects Java
930 // priorities and we are *explicitly* using OS priorities so that it's
931 // possible to set the compiler thread priority higher than any Java
932 // thread.
933
934 int native_prio = CompilerThreadPriority;
935 if (native_prio == -1) {
936 if (UseCriticalCompilerThreadPriority) {
937 native_prio = os::java_to_os_priority[CriticalPriority];
938 } else {
939 native_prio = os::java_to_os_priority[NearMaxPriority];
940 }
941 }
942 os::set_native_priority(compiler_thread, native_prio);
943
944 java_lang_Thread::set_daemon(thread_oop());
945
946 compiler_thread->set_threadObj(thread_oop());
947 Threads::add(compiler_thread);
948 Thread::start(compiler_thread);
949 }
950
951 // Let go of Threads_lock before yielding
952 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
953
954 return compiler_thread;
955 }
956
957
958 // ------------------------------------------------------------------
959 // CompileBroker::init_compiler_threads
960 //
961 // Initialize the compilation queue
962 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
963 EXCEPTION_MARK;
964 #if !defined(ZERO) && !defined(SHARK)
965 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
966 #endif // !ZERO && !SHARK
967 if (c2_compiler_count > 0) {
968 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
969 }
970 if (c1_compiler_count > 0) {
971 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
972 }
973
974 int compiler_count = c1_compiler_count + c2_compiler_count;
975
976 _method_threads =
977 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
978
979 char name_buffer[256];
980 for (int i = 0; i < c2_compiler_count; i++) {
981 // Create a name for our thread.
982 sprintf(name_buffer, "C2 CompilerThread%d", i);
983 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
984 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
985 _method_threads->append(new_thread);
986 }
987
988 for (int i = c2_compiler_count; i < compiler_count; i++) {
989 // Create a name for our thread.
990 sprintf(name_buffer, "C1 CompilerThread%d", i);
991 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
992 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
993 _method_threads->append(new_thread);
994 }
995
996 if (UsePerfData) {
997 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
998 compiler_count, CHECK);
999 }
1000 }
1001
1002
1003 // Set the methods on the stack as on_stack so that redefine classes doesn't
1004 // reclaim them
1005 void CompileBroker::mark_on_stack() {
1006 if (_c2_method_queue != NULL) {
1007 _c2_method_queue->mark_on_stack();
1008 }
1009 if (_c1_method_queue != NULL) {
1010 _c1_method_queue->mark_on_stack();
1011 }
1012 }
1013
1014 // ------------------------------------------------------------------
1015 // CompileBroker::is_idle
1016 bool CompileBroker::is_idle() {
1017 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
1018 return false;
1019 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
1020 return false;
1021 } else {
1022 int num_threads = _method_threads->length();
1023 for (int i=0; i<num_threads; i++) {
1024 if (_method_threads->at(i)->task() != NULL) {
1025 return false;
1026 }
1027 }
1028
1029 // No pending or active compilations.
1030 return true;
1031 }
1032 }
1033
1034
1035 // ------------------------------------------------------------------
1036 // CompileBroker::compile_method
1037 //
1038 // Request compilation of a method.
1039 void CompileBroker::compile_method_base(methodHandle method,
1040 int osr_bci,
1041 int comp_level,
1042 methodHandle hot_method,
1043 int hot_count,
1044 const char* comment,
1045 Thread* thread) {
1046 // do nothing if compiler thread(s) is not available
1047 if (!_initialized ) {
1048 return;
1049 }
1050
1051 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1052 assert(method->method_holder()->oop_is_instance(),
1053 "sanity check");
1054 assert(!method->method_holder()->is_not_initialized(),
1055 "method holder must be initialized");
1056 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1057
1058 if (CIPrintRequests) {
1059 tty->print("request: ");
1060 method->print_short_name(tty);
1061 if (osr_bci != InvocationEntryBci) {
1062 tty->print(" osr_bci: %d", osr_bci);
1063 }
1064 tty->print(" comment: %s count: %d", comment, hot_count);
1065 if (!hot_method.is_null()) {
1066 tty->print(" hot: ");
1067 if (hot_method() != method()) {
1068 hot_method->print_short_name(tty);
1069 } else {
1070 tty->print("yes");
1071 }
1072 }
1073 tty->cr();
1074 }
1075
1076 // A request has been made for compilation. Before we do any
1077 // real work, check to see if the method has been compiled
1078 // in the meantime with a definitive result.
1079 if (compilation_is_complete(method, osr_bci, comp_level)) {
1080 return;
1081 }
1082
1083 #ifndef PRODUCT
1084 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1085 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1086 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1087 return;
1088 }
1089 }
1090 #endif
1091
1092 // If this method is already in the compile queue, then
1093 // we do not block the current thread.
1094 if (compilation_is_in_queue(method, osr_bci)) {
1095 // We may want to decay our counter a bit here to prevent
1096 // multiple denied requests for compilation. This is an
1097 // open compilation policy issue. Note: The other possibility,
1098 // in the case that this is a blocking compile request, is to have
1099 // all subsequent blocking requesters wait for completion of
1100 // ongoing compiles. Note that in this case we'll need a protocol
1101 // for freeing the associated compile tasks. [Or we could have
1102 // a single static monitor on which all these waiters sleep.]
1103 return;
1104 }
1105
1106 // If the requesting thread is holding the pending list lock
1107 // then we just return. We can't risk blocking while holding
1108 // the pending list lock or a 3-way deadlock may occur
1109 // between the reference handler thread, a GC (instigated
1110 // by a compiler thread), and compiled method registration.
1111 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1112 return;
1113 }
1114
1115 // Outputs from the following MutexLocker block:
1116 CompileTask* task = NULL;
1117 bool blocking = false;
1118 CompileQueue* queue = compile_queue(comp_level);
1119
1120 // Acquire our lock.
1121 {
1122 MutexLocker locker(queue->lock(), thread);
1123
1124 // Make sure the method has not slipped into the queues since
1125 // last we checked; note that those checks were "fast bail-outs".
1126 // Here we need to be more careful, see 14012000 below.
1127 if (compilation_is_in_queue(method, osr_bci)) {
1128 return;
1129 }
1130
1131 // We need to check again to see if the compilation has
1132 // completed. A previous compilation may have registered
1133 // some result.
1134 if (compilation_is_complete(method, osr_bci, comp_level)) {
1135 return;
1136 }
1137
1138 // We now know that this compilation is not pending, complete,
1139 // or prohibited. Assign a compile_id to this compilation
1140 // and check to see if it is in our [Start..Stop) range.
1141 uint compile_id = assign_compile_id(method, osr_bci);
1142 if (compile_id == 0) {
1143 // The compilation falls outside the allowed range.
1144 return;
1145 }
1146
1147 // Should this thread wait for completion of the compile?
1148 blocking = is_compile_blocking(method, osr_bci);
1149
1150 // We will enter the compilation in the queue.
1151 // 14012000: Note that this sets the queued_for_compile bits in
1152 // the target method. We can now reason that a method cannot be
1153 // queued for compilation more than once, as follows:
1154 // Before a thread queues a task for compilation, it first acquires
1155 // the compile queue lock, then checks if the method's queued bits
1156 // are set or it has already been compiled. Thus there can not be two
1157 // instances of a compilation task for the same method on the
1158 // compilation queue. Consider now the case where the compilation
1159 // thread has already removed a task for that method from the queue
1160 // and is in the midst of compiling it. In this case, the
1161 // queued_for_compile bits must be set in the method (and these
1162 // will be visible to the current thread, since the bits were set
1163 // under protection of the compile queue lock, which we hold now.
1164 // When the compilation completes, the compiler thread first sets
1165 // the compilation result and then clears the queued_for_compile
1166 // bits. Neither of these actions are protected by a barrier (or done
1167 // under the protection of a lock), so the only guarantee we have
1168 // (on machines with TSO (Total Store Order)) is that these values
1169 // will update in that order. As a result, the only combinations of
1170 // these bits that the current thread will see are, in temporal order:
1171 // <RESULT, QUEUE> :
1172 // <0, 1> : in compile queue, but not yet compiled
1173 // <1, 1> : compiled but queue bit not cleared
1174 // <1, 0> : compiled and queue bit cleared
1175 // Because we first check the queue bits then check the result bits,
1176 // we are assured that we cannot introduce a duplicate task.
1177 // Note that if we did the tests in the reverse order (i.e. check
1178 // result then check queued bit), we could get the result bit before
1179 // the compilation completed, and the queue bit after the compilation
1180 // completed, and end up introducing a "duplicate" (redundant) task.
1181 // In that case, the compiler thread should first check if a method
1182 // has already been compiled before trying to compile it.
1183 // NOTE: in the event that there are multiple compiler threads and
1184 // there is de-optimization/recompilation, things will get hairy,
1185 // and in that case it's best to protect both the testing (here) of
1186 // these bits, and their updating (here and elsewhere) under a
1187 // common lock.
1188 task = create_compile_task(queue,
1189 compile_id, method,
1190 osr_bci, comp_level,
1191 hot_method, hot_count, comment,
1192 blocking);
1193 }
1194
1195 if (blocking) {
1196 wait_for_completion(task);
1197 }
1198 }
1199
1200
1201 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1202 int comp_level,
1203 methodHandle hot_method, int hot_count,
1204 const char* comment, Thread* THREAD) {
1205 // make sure arguments make sense
1206 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1207 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1208 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1209 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1210 // allow any levels for WhiteBox
1211 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1212 // return quickly if possible
1213
1214 // lock, make sure that the compilation
1215 // isn't prohibited in a straightforward way.
1216 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1217 if (comp == NULL || !comp->can_compile_method(method) ||
1218 compilation_is_prohibited(method, osr_bci, comp_level)) {
1219 return NULL;
1220 }
1221
1222 if (osr_bci == InvocationEntryBci) {
1223 // standard compilation
1224 nmethod* method_code = method->code();
1225 if (method_code != NULL) {
1226 if (compilation_is_complete(method, osr_bci, comp_level)) {
1227 return method_code;
1228 }
1229 }
1230 if (method->is_not_compilable(comp_level)) return NULL;
1231
1232 if (UseCodeCacheFlushing) {
1233 nmethod* saved = CodeCache::reanimate_saved_code(method());
1234 if (saved != NULL) {
1235 method->set_code(method, saved);
1236 return saved;
1237 }
1238 }
1239
1240 } else {
1241 // osr compilation
1242 #ifndef TIERED
1243 // seems like an assert of dubious value
1244 assert(comp_level == CompLevel_highest_tier,
1245 "all OSR compiles are assumed to be at a single compilation lavel");
1246 #endif // TIERED
1247 // We accept a higher level osr method
1248 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1249 if (nm != NULL) return nm;
1250 if (method->is_not_osr_compilable(comp_level)) return NULL;
1251 }
1252
1253 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1254 // some prerequisites that are compiler specific
1255 if (comp->is_c2() || comp->is_shark()) {
1256 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1257 // Resolve all classes seen in the signature of the method
1258 // we are compiling.
1259 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1260 }
1261
1262 // If the method is native, do the lookup in the thread requesting
1263 // the compilation. Native lookups can load code, which is not
1264 // permitted during compilation.
1265 //
1266 // Note: A native method implies non-osr compilation which is
1267 // checked with an assertion at the entry of this method.
1268 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1269 bool in_base_library;
1270 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1271 if (HAS_PENDING_EXCEPTION) {
1272 // In case of an exception looking up the method, we just forget
1273 // about it. The interpreter will kick-in and throw the exception.
1274 method->set_not_compilable(); // implies is_not_osr_compilable()
1275 CLEAR_PENDING_EXCEPTION;
1276 return NULL;
1277 }
1278 assert(method->has_native_function(), "must have native code by now");
1279 }
1280
1281 // RedefineClasses() has replaced this method; just return
1282 if (method->is_old()) {
1283 return NULL;
1284 }
1285
1286 // JVMTI -- post_compile_event requires jmethod_id() that may require
1287 // a lock the compiling thread can not acquire. Prefetch it here.
1288 if (JvmtiExport::should_post_compiled_method_load()) {
1289 method->jmethod_id();
1290 }
1291
1292 // If the compiler is shut off due to code cache getting full
1293 // fail out now so blocking compiles dont hang the java thread
1294 if (!should_compile_new_jobs()) {
1295 CompilationPolicy::policy()->delay_compilation(method());
1296 return NULL;
1297 }
1298
1299 // do the compilation
1300 if (method->is_native()) {
1301 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1302 // Acquire our lock.
1303 int compile_id;
1304 {
1305 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1306 compile_id = assign_compile_id(method, standard_entry_bci);
1307 }
1308 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1309 } else {
1310 return NULL;
1311 }
1312 } else {
1313 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1314 }
1315
1316 // return requested nmethod
1317 // We accept a higher level osr method
1318 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1319 }
1320
1321
1322 // ------------------------------------------------------------------
1323 // CompileBroker::compilation_is_complete
1324 //
1325 // See if compilation of this method is already complete.
1326 bool CompileBroker::compilation_is_complete(methodHandle method,
1327 int osr_bci,
1328 int comp_level) {
1329 bool is_osr = (osr_bci != standard_entry_bci);
1330 if (is_osr) {
1331 if (method->is_not_osr_compilable(comp_level)) {
1332 return true;
1333 } else {
1334 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1335 return (result != NULL);
1336 }
1337 } else {
1338 if (method->is_not_compilable(comp_level)) {
1339 return true;
1340 } else {
1341 nmethod* result = method->code();
1342 if (result == NULL) return false;
1343 return comp_level == result->comp_level();
1344 }
1345 }
1346 }
1347
1348
1349 // ------------------------------------------------------------------
1350 // CompileBroker::compilation_is_in_queue
1351 //
1352 // See if this compilation is already requested.
1353 //
1354 // Implementation note: there is only a single "is in queue" bit
1355 // for each method. This means that the check below is overly
1356 // conservative in the sense that an osr compilation in the queue
1357 // will block a normal compilation from entering the queue (and vice
1358 // versa). This can be remedied by a full queue search to disambiguate
1359 // cases. If it is deemed profitible, this may be done.
1360 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1361 int osr_bci) {
1362 return method->queued_for_compilation();
1363 }
1364
1365 // ------------------------------------------------------------------
1366 // CompileBroker::compilation_is_prohibited
1367 //
1368 // See if this compilation is not allowed.
1369 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1370 bool is_native = method->is_native();
1371 // Some compilers may not support the compilation of natives.
1372 AbstractCompiler *comp = compiler(comp_level);
1373 if (is_native &&
1374 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1375 method->set_not_compilable_quietly(comp_level);
1376 return true;
1377 }
1378
1379 bool is_osr = (osr_bci != standard_entry_bci);
1380 // Some compilers may not support on stack replacement.
1381 if (is_osr &&
1382 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1383 method->set_not_osr_compilable(comp_level);
1384 return true;
1385 }
1386
1387 // The method may be explicitly excluded by the user.
1388 bool quietly;
1389 if (CompilerOracle::should_exclude(method, quietly)) {
1390 if (!quietly) {
1391 // This does not happen quietly...
1392 ResourceMark rm;
1393 tty->print("### Excluding %s:%s",
1394 method->is_native() ? "generation of native wrapper" : "compile",
1395 (method->is_static() ? " static" : ""));
1396 method->print_short_name(tty);
1397 tty->cr();
1398 }
1399 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1400 }
1401
1402 return false;
1403 }
1404
1405
1406 // ------------------------------------------------------------------
1407 // CompileBroker::assign_compile_id
1408 //
1409 // Assign a serialized id number to this compilation request. If the
1410 // number falls out of the allowed range, return a 0. OSR
1411 // compilations may be numbered separately from regular compilations
1412 // if certain debugging flags are used.
1413 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1414 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1415 "must hold the compilation queue lock");
1416 bool is_osr = (osr_bci != standard_entry_bci);
1417 uint id;
1418 if (CICountOSR && is_osr) {
1419 id = ++_osr_compilation_id;
1420 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1421 return id;
1422 }
1423 } else {
1424 id = ++_compilation_id;
1425 if ((uint)CIStart <= id && id < (uint)CIStop) {
1426 return id;
1427 }
1428 }
1429
1430 // Method was not in the appropriate compilation range.
1431 method->set_not_compilable_quietly();
1432 return 0;
1433 }
1434
1435
1436 // ------------------------------------------------------------------
1437 // CompileBroker::is_compile_blocking
1438 //
1439 // Should the current thread be blocked until this compilation request
1440 // has been fulfilled?
1441 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1442 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1443 return !BackgroundCompilation;
1444 }
1445
1446
1447 // ------------------------------------------------------------------
1448 // CompileBroker::preload_classes
1449 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1450 // Move this code over from c1_Compiler.cpp
1451 ShouldNotReachHere();
1452 }
1453
1454
1455 // ------------------------------------------------------------------
1456 // CompileBroker::create_compile_task
1457 //
1458 // Create a CompileTask object representing the current request for
1459 // compilation. Add this task to the queue.
1460 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1461 int compile_id,
1462 methodHandle method,
1463 int osr_bci,
1464 int comp_level,
1465 methodHandle hot_method,
1466 int hot_count,
1467 const char* comment,
1468 bool blocking) {
1469 CompileTask* new_task = allocate_task();
1470 new_task->initialize(compile_id, method, osr_bci, comp_level,
1471 hot_method, hot_count, comment,
1472 blocking);
1473 queue->add(new_task);
1474 return new_task;
1475 }
1476
1477
1478 // ------------------------------------------------------------------
1479 // CompileBroker::allocate_task
1480 //
1481 // Allocate a CompileTask, from the free list if possible.
1482 CompileTask* CompileBroker::allocate_task() {
1483 MutexLocker locker(CompileTaskAlloc_lock);
1484 CompileTask* task = NULL;
1485 if (_task_free_list != NULL) {
1486 task = _task_free_list;
1487 _task_free_list = task->next();
1488 task->set_next(NULL);
1489 } else {
1490 task = new CompileTask();
1491 task->set_next(NULL);
1492 }
1493 return task;
1494 }
1495
1496
1497 // ------------------------------------------------------------------
1498 // CompileBroker::free_task
1499 //
1500 // Add a task to the free list.
1501 void CompileBroker::free_task(CompileTask* task) {
1502 MutexLocker locker(CompileTaskAlloc_lock);
1503 task->free();
1504 task->set_next(_task_free_list);
1505 _task_free_list = task;
1506 }
1507
1508
1509 // ------------------------------------------------------------------
1510 // CompileBroker::wait_for_completion
1511 //
1512 // Wait for the given method CompileTask to complete.
1513 void CompileBroker::wait_for_completion(CompileTask* task) {
1514 if (CIPrintCompileQueue) {
1515 tty->print_cr("BLOCKING FOR COMPILE");
1516 }
1517
1518 assert(task->is_blocking(), "can only wait on blocking task");
1519
1520 JavaThread *thread = JavaThread::current();
1521 thread->set_blocked_on_compilation(true);
1522
1523 methodHandle method(thread, task->method());
1524 {
1525 MutexLocker waiter(task->lock(), thread);
1526
1527 while (!task->is_complete())
1528 task->lock()->wait();
1529 }
1530 // It is harmless to check this status without the lock, because
1531 // completion is a stable property (until the task object is recycled).
1532 assert(task->is_complete(), "Compilation should have completed");
1533 assert(task->code_handle() == NULL, "must be reset");
1534
1535 thread->set_blocked_on_compilation(false);
1536
1537 // By convention, the waiter is responsible for recycling a
1538 // blocking CompileTask. Since there is only one waiter ever
1539 // waiting on a CompileTask, we know that no one else will
1540 // be using this CompileTask; we can free it.
1541 free_task(task);
1542 }
1543
1544 // ------------------------------------------------------------------
1545 // CompileBroker::compiler_thread_loop
1546 //
1547 // The main loop run by a CompilerThread.
1548 void CompileBroker::compiler_thread_loop() {
1549 CompilerThread* thread = CompilerThread::current();
1550 CompileQueue* queue = thread->queue();
1551
1552 // For the thread that initializes the ciObjectFactory
1553 // this resource mark holds all the shared objects
1554 ResourceMark rm;
1555
1556 // First thread to get here will initialize the compiler interface
1557
1558 if (!ciObjectFactory::is_initialized()) {
1559 ASSERT_IN_VM;
1560 MutexLocker only_one (CompileThread_lock, thread);
1561 if (!ciObjectFactory::is_initialized()) {
1562 ciObjectFactory::initialize();
1563 }
1564 }
1565
1566 // Open a log.
1567 if (LogCompilation) {
1568 init_compiler_thread_log();
1569 }
1570 CompileLog* log = thread->log();
1571 if (log != NULL) {
1572 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1573 thread->name(),
1574 os::current_thread_id(),
1575 os::current_process_id());
1576 log->stamp();
1577 log->end_elem();
1578 }
1579
1580 while (true) {
1581 {
1582 // We need this HandleMark to avoid leaking VM handles.
1583 HandleMark hm(thread);
1584
1585 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1586 // the code cache is really full
1587 handle_full_code_cache();
1588 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1589 // Attempt to start cleaning the code cache while there is still a little headroom
1590 NMethodSweeper::handle_full_code_cache(false);
1591 }
1592
1593 CompileTask* task = queue->get();
1594
1595 // Give compiler threads an extra quanta. They tend to be bursty and
1596 // this helps the compiler to finish up the job.
1597 if( CompilerThreadHintNoPreempt )
1598 os::hint_no_preempt();
1599
1600 // trace per thread time and compile statistics
1601 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1602 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1603
1604 // Assign the task to the current thread. Mark this compilation
1605 // thread as active for the profiler.
1606 CompileTaskWrapper ctw(task);
1607 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1608 task->set_code_handle(&result_handle);
1609 methodHandle method(thread, task->method());
1610
1611 // Never compile a method if breakpoints are present in it
1612 if (method()->number_of_breakpoints() == 0) {
1613 // Compile the method.
1614 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1615 #ifdef COMPILER1
1616 // Allow repeating compilations for the purpose of benchmarking
1617 // compile speed. This is not useful for customers.
1618 if (CompilationRepeat != 0) {
1619 int compile_count = CompilationRepeat;
1620 while (compile_count > 0) {
1621 invoke_compiler_on_method(task);
1622 nmethod* nm = method->code();
1623 if (nm != NULL) {
1624 nm->make_zombie();
1625 method->clear_code();
1626 }
1627 compile_count--;
1628 }
1629 }
1630 #endif /* COMPILER1 */
1631 invoke_compiler_on_method(task);
1632 } else {
1633 // After compilation is disabled, remove remaining methods from queue
1634 method->clear_queued_for_compilation();
1635 }
1636 }
1637 }
1638 }
1639 }
1640
1641
1642 // ------------------------------------------------------------------
1643 // CompileBroker::init_compiler_thread_log
1644 //
1645 // Set up state required by +LogCompilation.
1646 void CompileBroker::init_compiler_thread_log() {
1647 CompilerThread* thread = CompilerThread::current();
1648 char file_name[4*K];
1649 FILE* fp = NULL;
1650 intx thread_id = os::current_thread_id();
1651 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1652 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1653 if (dir == NULL) {
1654 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1655 thread_id, os::current_process_id());
1656 } else {
1657 jio_snprintf(file_name, sizeof(file_name),
1658 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1659 os::file_separator(), thread_id, os::current_process_id());
1660 }
1661
1662 fp = fopen(file_name, "at");
1663 if (fp != NULL) {
1664 if (LogCompilation && Verbose) {
1665 tty->print_cr("Opening compilation log %s", file_name);
1666 }
1667 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1668 thread->init_log(log);
1669
1670 if (xtty != NULL) {
1671 ttyLocker ttyl;
1672 // Record any per thread log files
1673 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name);
1674 }
1675 return;
1676 }
1677 }
1678 warning("Cannot open log file: %s", file_name);
1679 }
1680
1681 // ------------------------------------------------------------------
1682 // CompileBroker::set_should_block
1683 //
1684 // Set _should_block.
1685 // Call this from the VM, with Threads_lock held and a safepoint requested.
1686 void CompileBroker::set_should_block() {
1687 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1688 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1689 #ifndef PRODUCT
1690 if (PrintCompilation && (Verbose || WizardMode))
1691 tty->print_cr("notifying compiler thread pool to block");
1692 #endif
1693 _should_block = true;
1694 }
1695
1696 // ------------------------------------------------------------------
1697 // CompileBroker::maybe_block
1698 //
1699 // Call this from the compiler at convenient points, to poll for _should_block.
1700 void CompileBroker::maybe_block() {
1701 if (_should_block) {
1702 #ifndef PRODUCT
1703 if (PrintCompilation && (Verbose || WizardMode))
1704 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1705 #endif
1706 ThreadInVMfromNative tivfn(JavaThread::current());
1707 }
1708 }
1709
1710 // wrapper for CodeCache::print_summary()
1711 static void codecache_print(bool detailed)
1712 {
1713 ResourceMark rm;
1714 stringStream s;
1715 // Dump code cache into a buffer before locking the tty,
1716 {
1717 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1718 CodeCache::print_summary(&s, detailed);
1719 }
1720 ttyLocker ttyl;
1721 tty->print(s.as_string());
1722 }
1723
1724 // ------------------------------------------------------------------
1725 // CompileBroker::invoke_compiler_on_method
1726 //
1727 // Compile a method.
1728 //
1729 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1730 if (PrintCompilation) {
1731 ResourceMark rm;
1732 task->print_line();
1733 }
1734 elapsedTimer time;
1735
1736 CompilerThread* thread = CompilerThread::current();
1737 ResourceMark rm(thread);
1738
1739 if (LogEvents) {
1740 _compilation_log->log_compile(thread, task);
1741 }
1742
1743 // Common flags.
1744 uint compile_id = task->compile_id();
1745 int osr_bci = task->osr_bci();
1746 bool is_osr = (osr_bci != standard_entry_bci);
1747 bool should_log = (thread->log() != NULL);
1748 bool should_break = false;
1749 int task_level = task->comp_level();
1750 {
1751 // create the handle inside it's own block so it can't
1752 // accidentally be referenced once the thread transitions to
1753 // native. The NoHandleMark before the transition should catch
1754 // any cases where this occurs in the future.
1755 methodHandle method(thread, task->method());
1756 should_break = check_break_at(method, compile_id, is_osr);
1757 if (should_log && !CompilerOracle::should_log(method)) {
1758 should_log = false;
1759 }
1760 assert(!method->is_native(), "no longer compile natives");
1761
1762 // Save information about this method in case of failure.
1763 set_last_compile(thread, method, is_osr, task_level);
1764
1765 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1766 }
1767
1768 // Allocate a new set of JNI handles.
1769 push_jni_handle_block();
1770 Method* target_handle = task->method();
1771 int compilable = ciEnv::MethodCompilable;
1772 {
1773 int system_dictionary_modification_counter;
1774 {
1775 MutexLocker locker(Compile_lock, thread);
1776 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1777 }
1778
1779 NoHandleMark nhm;
1780 ThreadToNativeFromVM ttn(thread);
1781
1782 ciEnv ci_env(task, system_dictionary_modification_counter);
1783 if (should_break) {
1784 ci_env.set_break_at_compile(true);
1785 }
1786 if (should_log) {
1787 ci_env.set_log(thread->log());
1788 }
1789 assert(thread->env() == &ci_env, "set by ci_env");
1790 // The thread-env() field is cleared in ~CompileTaskWrapper.
1791
1792 // Cache Jvmti state
1793 ci_env.cache_jvmti_state();
1794
1795 // Cache DTrace flags
1796 ci_env.cache_dtrace_flags();
1797
1798 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1799
1800 TraceTime t1("compilation", &time);
1801 EventCompilation event;
1802
1803 AbstractCompiler *comp = compiler(task_level);
1804 if (comp == NULL) {
1805 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1806 } else {
1807 comp->compile_method(&ci_env, target, osr_bci);
1808 }
1809
1810 if (!ci_env.failing() && task->code() == NULL) {
1811 //assert(false, "compiler should always document failure");
1812 // The compiler elected, without comment, not to register a result.
1813 // Do not attempt further compilations of this method.
1814 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1815 }
1816
1817 // Copy this bit to the enclosing block:
1818 compilable = ci_env.compilable();
1819
1820 if (ci_env.failing()) {
1821 const char* retry_message = ci_env.retry_message();
1822 if (_compilation_log != NULL) {
1823 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1824 }
1825 if (PrintCompilation) {
1826 FormatBufferResource msg = retry_message != NULL ?
1827 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1828 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1829 task->print_compilation(tty, msg);
1830 }
1831 } else {
1832 task->mark_success();
1833 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1834 if (_compilation_log != NULL) {
1835 nmethod* code = task->code();
1836 if (code != NULL) {
1837 _compilation_log->log_nmethod(thread, code);
1838 }
1839 }
1840 }
1841 // simulate crash during compilation
1842 assert(task->compile_id() != CICrashAt, "just as planned");
1843 if (event.should_commit()) {
1844 event.set_method(target->get_Method());
1845 event.set_compileID(compile_id);
1846 event.set_compileLevel(task->comp_level());
1847 event.set_succeded(task->is_success());
1848 event.set_isOsr(is_osr);
1849 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1850 event.set_inlinedBytes(task->num_inlined_bytecodes());
1851 event.commit();
1852 }
1853 }
1854 pop_jni_handle_block();
1855
1856 methodHandle method(thread, task->method());
1857
1858 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1859
1860 collect_statistics(thread, time, task);
1861
1862 if (PrintCompilation && PrintCompilation2) {
1863 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1864 tty->print("%4d ", compile_id); // print compilation number
1865 tty->print("%s ", (is_osr ? "%" : " "));
1866 if (task->code() != NULL) {
1867 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1868 }
1869 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1870 }
1871
1872 if (PrintCodeCacheOnCompilation)
1873 codecache_print(/* detailed= */ false);
1874
1875 // Disable compilation, if required.
1876 switch (compilable) {
1877 case ciEnv::MethodCompilable_never:
1878 if (is_osr)
1879 method->set_not_osr_compilable_quietly();
1880 else
1881 method->set_not_compilable_quietly();
1882 break;
1883 case ciEnv::MethodCompilable_not_at_tier:
1884 if (is_osr)
1885 method->set_not_osr_compilable_quietly(task_level);
1886 else
1887 method->set_not_compilable_quietly(task_level);
1888 break;
1889 }
1890
1891 // Note that the queued_for_compilation bits are cleared without
1892 // protection of a mutex. [They were set by the requester thread,
1893 // when adding the task to the complie queue -- at which time the
1894 // compile queue lock was held. Subsequently, we acquired the compile
1895 // queue lock to get this task off the compile queue; thus (to belabour
1896 // the point somewhat) our clearing of the bits must be occurring
1897 // only after the setting of the bits. See also 14012000 above.
1898 method->clear_queued_for_compilation();
1899
1900 #ifdef ASSERT
1901 if (CollectedHeap::fired_fake_oom()) {
1902 // The current compile received a fake OOM during compilation so
1903 // go ahead and exit the VM since the test apparently succeeded
1904 tty->print_cr("*** Shutting down VM after successful fake OOM");
1905 vm_exit(0);
1906 }
1907 #endif
1908 }
1909
1910 // ------------------------------------------------------------------
1911 // CompileBroker::handle_full_code_cache
1912 //
1913 // The CodeCache is full. Print out warning and disable compilation or
1914 // try code cache cleaning so compilation can continue later.
1915 void CompileBroker::handle_full_code_cache() {
1916 UseInterpreter = true;
1917 if (UseCompiler || AlwaysCompileLoopMethods ) {
1918 if (xtty != NULL) {
1919 ResourceMark rm;
1920 stringStream s;
1921 // Dump code cache state into a buffer before locking the tty,
1922 // because log_state() will use locks causing lock conflicts.
1923 CodeCache::log_state(&s);
1924 // Lock to prevent tearing
1925 ttyLocker ttyl;
1926 xtty->begin_elem("code_cache_full");
1927 xtty->print(s.as_string());
1928 xtty->stamp();
1929 xtty->end_elem();
1930 }
1931 warning("CodeCache is full. Compiler has been disabled.");
1932 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1933
1934 CodeCache::report_codemem_full();
1935
1936
1937 #ifndef PRODUCT
1938 if (CompileTheWorld || ExitOnFullCodeCache) {
1939 codecache_print(/* detailed= */ true);
1940 before_exit(JavaThread::current());
1941 exit_globals(); // will delete tty
1942 vm_direct_exit(CompileTheWorld ? 0 : 1);
1943 }
1944 #endif
1945 if (UseCodeCacheFlushing) {
1946 NMethodSweeper::handle_full_code_cache(true);
1947 } else {
1948 UseCompiler = false;
1949 AlwaysCompileLoopMethods = false;
1950 }
1951 }
1952 codecache_print(/* detailed= */ true);
1953 }
1954
1955 // ------------------------------------------------------------------
1956 // CompileBroker::set_last_compile
1957 //
1958 // Record this compilation for debugging purposes.
1959 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1960 ResourceMark rm;
1961 char* method_name = method->name()->as_C_string();
1962 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1963 char current_method[CompilerCounters::cmname_buffer_length];
1964 size_t maxLen = CompilerCounters::cmname_buffer_length;
1965
1966 if (UsePerfData) {
1967 const char* class_name = method->method_holder()->name()->as_C_string();
1968
1969 size_t s1len = strlen(class_name);
1970 size_t s2len = strlen(method_name);
1971
1972 // check if we need to truncate the string
1973 if (s1len + s2len + 2 > maxLen) {
1974
1975 // the strategy is to lop off the leading characters of the
1976 // class name and the trailing characters of the method name.
1977
1978 if (s2len + 2 > maxLen) {
1979 // lop of the entire class name string, let snprintf handle
1980 // truncation of the method name.
1981 class_name += s1len; // null string
1982 }
1983 else {
1984 // lop off the extra characters from the front of the class name
1985 class_name += ((s1len + s2len + 2) - maxLen);
1986 }
1987 }
1988
1989 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1990 }
1991
1992 if (CICountOSR && is_osr) {
1993 _last_compile_type = osr_compile;
1994 } else {
1995 _last_compile_type = normal_compile;
1996 }
1997 _last_compile_level = comp_level;
1998
1999 if (UsePerfData) {
2000 CompilerCounters* counters = thread->counters();
2001 counters->set_current_method(current_method);
2002 counters->set_compile_type((jlong)_last_compile_type);
2003 }
2004 }
2005
2006
2007 // ------------------------------------------------------------------
2008 // CompileBroker::push_jni_handle_block
2009 //
2010 // Push on a new block of JNI handles.
2011 void CompileBroker::push_jni_handle_block() {
2012 JavaThread* thread = JavaThread::current();
2013
2014 // Allocate a new block for JNI handles.
2015 // Inlined code from jni_PushLocalFrame()
2016 JNIHandleBlock* java_handles = thread->active_handles();
2017 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2018 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2019 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2020 thread->set_active_handles(compile_handles);
2021 }
2022
2023
2024 // ------------------------------------------------------------------
2025 // CompileBroker::pop_jni_handle_block
2026 //
2027 // Pop off the current block of JNI handles.
2028 void CompileBroker::pop_jni_handle_block() {
2029 JavaThread* thread = JavaThread::current();
2030
2031 // Release our JNI handle block
2032 JNIHandleBlock* compile_handles = thread->active_handles();
2033 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2034 thread->set_active_handles(java_handles);
2035 compile_handles->set_pop_frame_link(NULL);
2036 JNIHandleBlock::release_block(compile_handles, thread); // may block
2037 }
2038
2039
2040 // ------------------------------------------------------------------
2041 // CompileBroker::check_break_at
2042 //
2043 // Should the compilation break at the current compilation.
2044 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2045 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2046 return true;
2047 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2048 return true;
2049 } else {
2050 return (compile_id == CIBreakAt);
2051 }
2052 }
2053
2054 // ------------------------------------------------------------------
2055 // CompileBroker::collect_statistics
2056 //
2057 // Collect statistics about the compilation.
2058
2059 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2060 bool success = task->is_success();
2061 methodHandle method (thread, task->method());
2062 uint compile_id = task->compile_id();
2063 bool is_osr = (task->osr_bci() != standard_entry_bci);
2064 nmethod* code = task->code();
2065 CompilerCounters* counters = thread->counters();
2066
2067 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2068 MutexLocker locker(CompileStatistics_lock);
2069
2070 // _perf variables are production performance counters which are
2071 // updated regardless of the setting of the CITime and CITimeEach flags
2072 //
2073 if (!success) {
2074 _total_bailout_count++;
2075 if (UsePerfData) {
2076 _perf_last_failed_method->set_value(counters->current_method());
2077 _perf_last_failed_type->set_value(counters->compile_type());
2078 _perf_total_bailout_count->inc();
2079 }
2080 } else if (code == NULL) {
2081 if (UsePerfData) {
2082 _perf_last_invalidated_method->set_value(counters->current_method());
2083 _perf_last_invalidated_type->set_value(counters->compile_type());
2084 _perf_total_invalidated_count->inc();
2085 }
2086 _total_invalidated_count++;
2087 } else {
2088 // Compilation succeeded
2089
2090 // update compilation ticks - used by the implementation of
2091 // java.lang.management.CompilationMBean
2092 _perf_total_compilation->inc(time.ticks());
2093
2094 _t_total_compilation.add(time);
2095 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2096
2097 if (CITime) {
2098 if (is_osr) {
2099 _t_osr_compilation.add(time);
2100 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2101 } else {
2102 _t_standard_compilation.add(time);
2103 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2104 }
2105 }
2106
2107 if (UsePerfData) {
2108 // save the name of the last method compiled
2109 _perf_last_method->set_value(counters->current_method());
2110 _perf_last_compile_type->set_value(counters->compile_type());
2111 _perf_last_compile_size->set_value(method->code_size() +
2112 task->num_inlined_bytecodes());
2113 if (is_osr) {
2114 _perf_osr_compilation->inc(time.ticks());
2115 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2116 } else {
2117 _perf_standard_compilation->inc(time.ticks());
2118 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2119 }
2120 }
2121
2122 if (CITimeEach) {
2123 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2124 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2125 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2126 }
2127
2128 // Collect counts of successful compilations
2129 _sum_nmethod_size += code->total_size();
2130 _sum_nmethod_code_size += code->insts_size();
2131 _total_compile_count++;
2132
2133 if (UsePerfData) {
2134 _perf_sum_nmethod_size->inc( code->total_size());
2135 _perf_sum_nmethod_code_size->inc(code->insts_size());
2136 _perf_total_compile_count->inc();
2137 }
2138
2139 if (is_osr) {
2140 if (UsePerfData) _perf_total_osr_compile_count->inc();
2141 _total_osr_compile_count++;
2142 } else {
2143 if (UsePerfData) _perf_total_standard_compile_count->inc();
2144 _total_standard_compile_count++;
2145 }
2146 }
2147 // set the current method for the thread to null
2148 if (UsePerfData) counters->set_current_method("");
2149 }
2150
2151 const char* CompileBroker::compiler_name(int comp_level) {
2152 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2153 if (comp == NULL) {
2154 return "no compiler";
2155 } else {
2156 return (comp->name());
2157 }
2158 }
2159
2160 void CompileBroker::print_times() {
2161 tty->cr();
2162 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2163 tty->print_cr("------------------------------------------------");
2164 //0000000000111111111122222222223333333333444444444455555555556666666666
2165 //0123456789012345678901234567890123456789012345678901234567890123456789
2166 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2167 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2168 CompileBroker::_t_standard_compilation.seconds(),
2169 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2170 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);
2171
2172 AbstractCompiler *comp = compiler(CompLevel_simple);
2173 if (comp != NULL) {
2174 comp->print_timers();
2175 }
2176 comp = compiler(CompLevel_full_optimization);
2177 if (comp != NULL) {
2178 comp->print_timers();
2179 }
2180 tty->cr();
2181 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2182 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2183 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2184 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2185 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2186 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2187 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2188 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2189 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2190 tty->cr();
2191 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2192 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2193 }
2194
2195 // Debugging output for failure
2196 void CompileBroker::print_last_compile() {
2197 if ( _last_compile_level != CompLevel_none &&
2198 compiler(_last_compile_level) != NULL &&
2199 _last_method_compiled != NULL &&
2200 _last_compile_type != no_compile) {
2201 if (_last_compile_type == osr_compile) {
2202 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2203 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2204 } else {
2205 tty->print_cr("Last parse: %d+++(%d) %s",
2206 _compilation_id, _last_compile_level, _last_method_compiled);
2207 }
2208 }
2209 }
2210
2211
2212 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2213 #ifndef PRODUCT
2214 st->print_cr("Compiler thread printing unimplemented.");
2215 st->cr();
2216 #endif
2217 }