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/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 "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, comp_name) \
69 { \
70 Symbol* klass_name = (method)->klass_name(); \
71 Symbol* name = (method)->name(); \
72 Symbol* signature = (method)->signature(); \
73 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
74 comp_name, strlen(comp_name), \
75 klass_name->bytes(), klass_name->utf8_length(), \
76 name->bytes(), name->utf8_length(), \
77 signature->bytes(), signature->utf8_length()); \
78 }
79
80 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, \
81 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(compiler, 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(compiler, method, \
108 comp_name, success) \
109 { \
110 Symbol* klass_name = (method)->klass_name(); \
111 Symbol* name = (method)->name(); \
112 Symbol* signature = (method)->signature(); \
113 HOTSPOT_METHOD_COMPILE_END( \
114 comp_name, strlen(comp_name), \
115 (char *) klass_name->bytes(), klass_name->utf8_length(), \
116 (char *) name->bytes(), name->utf8_length(), \
117 (char *) signature->bytes(), signature->utf8_length(), (success)); \
118 }
119 #endif /* USDT2 */
120
121 #else // ndef DTRACE_ENABLED
122
123 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method, comp_name)
124 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, comp_name, success)
125
126 #endif // ndef DTRACE_ENABLED
127
128 bool CompileBroker::_initialized = false;
129 volatile bool CompileBroker::_should_block = false;
130 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
131
132 // The installed compiler(s)
133 AbstractCompiler* CompileBroker::_compilers[2];
134
135 // These counters are used for assigning id's to each compilation
136 uint CompileBroker::_compilation_id = 0;
137 uint CompileBroker::_osr_compilation_id = 0;
138
139 // Debugging information
140 int CompileBroker::_last_compile_type = no_compile;
141 int CompileBroker::_last_compile_level = CompLevel_none;
142 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
143
144 // Performance counters
145 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
146 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
147 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
148
149 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
153 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
154
155 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
156 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
157 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
158 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
159
160 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
161 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
162 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
163 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
165 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
166 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
167
168 // Timers and counters for generating statistics
169 elapsedTimer CompileBroker::_t_total_compilation;
170 elapsedTimer CompileBroker::_t_osr_compilation;
171 elapsedTimer CompileBroker::_t_standard_compilation;
172
173 int CompileBroker::_total_bailout_count = 0;
174 int CompileBroker::_total_invalidated_count = 0;
175 int CompileBroker::_total_compile_count = 0;
176 int CompileBroker::_total_osr_compile_count = 0;
177 int CompileBroker::_total_standard_compile_count = 0;
178
179 int CompileBroker::_sum_osr_bytes_compiled = 0;
180 int CompileBroker::_sum_standard_bytes_compiled = 0;
181 int CompileBroker::_sum_nmethod_size = 0;
182 int CompileBroker::_sum_nmethod_code_size = 0;
183
184 CompileQueue* CompileBroker::_c2_method_queue = NULL;
185 CompileQueue* CompileBroker::_c1_method_queue = NULL;
186 CompileTask* CompileBroker::_task_free_list = NULL;
187
188 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
189
190
191 class CompilationLog : public StringEventLog {
192 public:
193 CompilationLog() : StringEventLog("Compilation events") {
194 }
195
196 void log_compile(JavaThread* thread, CompileTask* task) {
197 StringLogMessage lm;
198 stringStream sstr = lm.stream();
199 // msg.time_stamp().update_to(tty->time_stamp().ticks());
200 task->print_compilation(&sstr, NULL, true);
201 log(thread, "%s", (const char*)lm);
202 }
203
204 void log_nmethod(JavaThread* thread, nmethod* nm) {
205 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
206 nm->compile_id(), nm->is_osr_method() ? "%" : "",
207 nm, nm->code_begin(), nm->code_end());
208 }
209
210 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
211 StringLogMessage lm;
212 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
213 if (retry_message != NULL) {
214 lm.append(" (%s)", retry_message);
215 }
216 lm.print("\n");
217 log(thread, "%s", (const char*)lm);
218 }
219 };
220
221 static CompilationLog* _compilation_log = NULL;
222
223 void compileBroker_init() {
224 if (LogEvents) {
225 _compilation_log = new CompilationLog();
226 }
227 }
228
229 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
230 CompilerThread* thread = CompilerThread::current();
231 thread->set_task(task);
232 CompileLog* log = thread->log();
233 if (log != NULL) task->log_task_start(log);
234 }
235
236 CompileTaskWrapper::~CompileTaskWrapper() {
237 CompilerThread* thread = CompilerThread::current();
238 CompileTask* task = thread->task();
239 CompileLog* log = thread->log();
240 if (log != NULL) task->log_task_done(log);
241 thread->set_task(NULL);
242 task->set_code_handle(NULL);
243 thread->set_env(NULL);
244 if (task->is_blocking()) {
245 MutexLocker notifier(task->lock(), thread);
246 task->mark_complete();
247 // Notify the waiting thread that the compilation has completed.
248 task->lock()->notify_all();
249 } else {
250 task->mark_complete();
251
252 // By convention, the compiling thread is responsible for
253 // recycling a non-blocking CompileTask.
254 CompileBroker::free_task(task);
255 }
256 }
257
258
259 // ------------------------------------------------------------------
260 // CompileTask::initialize
261 void CompileTask::initialize(int compile_id,
262 methodHandle method,
263 int osr_bci,
264 int comp_level,
265 methodHandle hot_method,
266 int hot_count,
267 const char* comment,
268 bool is_blocking) {
269 assert(!_lock->is_locked(), "bad locking");
270
271 _compile_id = compile_id;
272 _method = method();
273 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
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_method_holder = NULL;
285 _hot_count = hot_count;
286 _time_queued = 0; // tidy
287 _comment = comment;
288
289 if (LogCompilation) {
290 _time_queued = os::elapsed_counter();
291 if (hot_method.not_null()) {
292 if (hot_method == method) {
293 _hot_method = _method;
294 } else {
295 _hot_method = hot_method();
296 // only add loader or mirror if different from _method_holder
297 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
298 }
299 }
300 }
301
302 _next = NULL;
303 }
304
305 // ------------------------------------------------------------------
306 // CompileTask::code/set_code
307 nmethod* CompileTask::code() const {
308 if (_code_handle == NULL) return NULL;
309 return _code_handle->code();
310 }
311 void CompileTask::set_code(nmethod* nm) {
312 if (_code_handle == NULL && nm == NULL) return;
313 guarantee(_code_handle != NULL, "");
314 _code_handle->set_code(nm);
315 if (nm == NULL) _code_handle = NULL; // drop the handle also
316 }
317
318 // ------------------------------------------------------------------
319 // CompileTask::free
320 void CompileTask::free() {
321 set_code(NULL);
322 assert(!_lock->is_locked(), "Should not be locked when freed");
323 JNIHandles::destroy_global(_method_holder);
324 JNIHandles::destroy_global(_hot_method_holder);
325 }
326
327
328 void CompileTask::mark_on_stack() {
329 // Mark these methods as something redefine classes cannot remove.
330 _method->set_on_stack(true);
331 if (_hot_method != NULL) {
332 _hot_method->set_on_stack(true);
333 }
334 }
335
336 // ------------------------------------------------------------------
337 // CompileTask::print
338 void CompileTask::print() {
339 tty->print("<CompileTask compile_id=%d ", _compile_id);
340 tty->print("method=");
341 _method->print_name(tty);
342 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
343 _osr_bci, bool_to_str(_is_blocking),
344 bool_to_str(_is_complete), bool_to_str(_is_success));
345 }
346
347
348 // ------------------------------------------------------------------
349 // CompileTask::print_line_on_error
350 //
351 // This function is called by fatal error handler when the thread
352 // causing troubles is a compiler thread.
353 //
354 // Do not grab any lock, do not allocate memory.
355 //
356 // Otherwise it's the same as CompileTask::print_line()
357 //
358 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
359 // print compiler name
360 st->print("%s:", CompileBroker::compiler_name(comp_level()));
361 print_compilation(st);
362 }
363
364 // ------------------------------------------------------------------
365 // CompileTask::print_line
366 void CompileTask::print_line() {
367 ttyLocker ttyl; // keep the following output all in one block
368 // print compiler name if requested
369 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
370 print_compilation();
371 }
372
373
374 // ------------------------------------------------------------------
375 // CompileTask::print_compilation_impl
376 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
377 bool is_osr_method, int osr_bci, bool is_blocking,
378 const char* msg, bool short_form) {
379 if (!short_form) {
380 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
381 }
382 st->print("%4d ", compile_id); // print compilation number
383
384 // For unloaded methods the transition to zombie occurs after the
385 // method is cleared so it's impossible to report accurate
386 // information for that case.
387 bool is_synchronized = false;
388 bool has_exception_handler = false;
389 bool is_native = false;
390 if (method != NULL) {
391 is_synchronized = method->is_synchronized();
392 has_exception_handler = method->has_exception_handler();
393 is_native = method->is_native();
394 }
395 // method attributes
396 const char compile_type = is_osr_method ? '%' : ' ';
397 const char sync_char = is_synchronized ? 's' : ' ';
398 const char exception_char = has_exception_handler ? '!' : ' ';
399 const char blocking_char = is_blocking ? 'b' : ' ';
400 const char native_char = is_native ? 'n' : ' ';
401
402 // print method attributes
403 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
404
405 if (TieredCompilation) {
406 if (comp_level != -1) st->print("%d ", comp_level);
407 else st->print("- ");
408 }
409 st->print(" "); // more indent
410
411 if (method == NULL) {
412 st->print("(method)");
413 } else {
414 method->print_short_name(st);
415 if (is_osr_method) {
416 st->print(" @ %d", osr_bci);
417 }
418 if (method->is_native())
419 st->print(" (native)");
420 else
421 st->print(" (%d bytes)", method->code_size());
422 }
423
424 if (msg != NULL) {
425 st->print(" %s", msg);
426 }
427 if (!short_form) {
428 st->cr();
429 }
430 }
431
432 // ------------------------------------------------------------------
433 // CompileTask::print_inlining
434 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
435 // 1234567
436 st->print(" "); // print timestamp
437 // 1234
438 st->print(" "); // print compilation number
439
440 // method attributes
441 if (method->is_loaded()) {
442 const char sync_char = method->is_synchronized() ? 's' : ' ';
443 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
444 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
445
446 // print method attributes
447 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
448 } else {
449 // %s!bn
450 st->print(" "); // print method attributes
451 }
452
453 if (TieredCompilation) {
454 st->print(" ");
455 }
456 st->print(" "); // more indent
457 st->print(" "); // initial inlining indent
458
459 for (int i = 0; i < inline_level; i++) st->print(" ");
460
461 st->print("@ %d ", bci); // print bci
462 method->print_short_name(st);
463 if (method->is_loaded())
464 st->print(" (%d bytes)", method->code_size());
465 else
466 st->print(" (not loaded)");
467
468 if (msg != NULL) {
469 st->print(" %s", msg);
470 }
471 st->cr();
472 }
473
474 // ------------------------------------------------------------------
475 // CompileTask::print_inline_indent
476 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
477 // 1234567
478 st->print(" "); // print timestamp
479 // 1234
480 st->print(" "); // print compilation number
481 // %s!bn
482 st->print(" "); // print method attributes
483 if (TieredCompilation) {
484 st->print(" ");
485 }
486 st->print(" "); // more indent
487 st->print(" "); // initial inlining indent
488 for (int i = 0; i < inline_level; i++) st->print(" ");
489 }
490
491 // ------------------------------------------------------------------
492 // CompileTask::print_compilation
493 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
494 bool is_osr_method = osr_bci() != InvocationEntryBci;
495 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
496 }
497
498 // ------------------------------------------------------------------
499 // CompileTask::log_task
500 void CompileTask::log_task(xmlStream* log) {
501 Thread* thread = Thread::current();
502 methodHandle method(thread, this->method());
503 ResourceMark rm(thread);
504
505 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
506 log->print(" compile_id='%d'", _compile_id);
507 if (_osr_bci != CompileBroker::standard_entry_bci) {
508 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
509 } // else compile_kind='c2c'
510 if (!method.is_null()) log->method(method);
511 if (_osr_bci != CompileBroker::standard_entry_bci) {
512 log->print(" osr_bci='%d'", _osr_bci);
513 }
514 if (_comp_level != CompLevel_highest_tier) {
515 log->print(" level='%d'", _comp_level);
516 }
517 if (_is_blocking) {
518 log->print(" blocking='1'");
519 }
520 log->stamp();
521 }
522
523
524 // ------------------------------------------------------------------
525 // CompileTask::log_task_queued
526 void CompileTask::log_task_queued() {
527 Thread* thread = Thread::current();
528 ttyLocker ttyl;
529 ResourceMark rm(thread);
530
531 xtty->begin_elem("task_queued");
532 log_task(xtty);
533 if (_comment != NULL) {
534 xtty->print(" comment='%s'", _comment);
535 }
536 if (_hot_method != NULL) {
537 methodHandle hot(thread, _hot_method);
538 methodHandle method(thread, _method);
539 if (hot() != method()) {
540 xtty->method(hot);
541 }
542 }
543 if (_hot_count != 0) {
544 xtty->print(" hot_count='%d'", _hot_count);
545 }
546 xtty->end_elem();
547 }
548
549
550 // ------------------------------------------------------------------
551 // CompileTask::log_task_start
552 void CompileTask::log_task_start(CompileLog* log) {
553 log->begin_head("task");
554 log_task(log);
555 log->end_head();
556 }
557
558
559 // ------------------------------------------------------------------
560 // CompileTask::log_task_done
561 void CompileTask::log_task_done(CompileLog* log) {
562 Thread* thread = Thread::current();
563 methodHandle method(thread, this->method());
564 ResourceMark rm(thread);
565
566 // <task_done ... stamp='1.234'> </task>
567 nmethod* nm = code();
568 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
569 _is_success, nm == NULL ? 0 : nm->content_size(),
570 method->invocation_count());
571 int bec = method->backedge_count();
572 if (bec != 0) log->print(" backedge_count='%d'", bec);
573 // Note: "_is_complete" is about to be set, but is not.
574 if (_num_inlined_bytecodes != 0) {
575 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
576 }
577 log->stamp();
578 log->end_elem();
579 log->tail("task");
580 log->clear_identities(); // next task will have different CI
581 if (log->unflushed_count() > 2000) {
582 log->flush();
583 }
584 log->mark_file_end();
585 }
586
587
588
589 // ------------------------------------------------------------------
590 // CompileQueue::add
591 //
592 // Add a CompileTask to a CompileQueue
593 void CompileQueue::add(CompileTask* task) {
594 assert(lock()->owned_by_self(), "must own lock");
595
596 task->set_next(NULL);
597 task->set_prev(NULL);
598
599 if (_last == NULL) {
600 // The compile queue is empty.
601 assert(_first == NULL, "queue is empty");
602 _first = task;
603 _last = task;
604 } else {
605 // Append the task to the queue.
606 assert(_last->next() == NULL, "not last");
607 _last->set_next(task);
608 task->set_prev(_last);
609 _last = task;
610 }
611 ++_size;
612
613 // Mark the method as being in the compile queue.
614 task->method()->set_queued_for_compilation();
615
616 if (CIPrintCompileQueue) {
617 print();
618 }
619
620 if (LogCompilation && xtty != NULL) {
621 task->log_task_queued();
622 }
623
624 // Notify CompilerThreads that a task is available.
625 lock()->notify_all();
626 }
627
628 // ------------------------------------------------------------------
629 // CompileQueue::get
630 //
631 // Get the next CompileTask from a CompileQueue
632 CompileTask* CompileQueue::get() {
633 NMethodSweeper::possibly_sweep();
634
635 MutexLocker locker(lock());
636 // Wait for an available CompileTask.
637 while (_first == NULL) {
638 // There is no work to be done right now. Wait.
639 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
640 // During the emergency sweeping periods, wake up and sweep occasionally
641 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
642 if (timedout) {
643 MutexUnlocker ul(lock());
644 // When otherwise not busy, run nmethod sweeping
645 NMethodSweeper::possibly_sweep();
646 }
647 } else {
648 // During normal operation no need to wake up on timer
649 lock()->wait();
650 }
651 }
652 CompileTask* task = CompilationPolicy::policy()->select_task(this);
653 remove(task);
654 return task;
655 }
656
657 void CompileQueue::remove(CompileTask* task)
658 {
659 assert(lock()->owned_by_self(), "must own lock");
660 if (task->prev() != NULL) {
661 task->prev()->set_next(task->next());
662 } else {
663 // max is the first element
664 assert(task == _first, "Sanity");
665 _first = task->next();
666 }
667
668 if (task->next() != NULL) {
669 task->next()->set_prev(task->prev());
670 } else {
671 // max is the last element
672 assert(task == _last, "Sanity");
673 _last = task->prev();
674 }
675 --_size;
676 }
677
678 // methods in the compile queue need to be marked as used on the stack
679 // so that they don't get reclaimed by Redefine Classes
680 void CompileQueue::mark_on_stack() {
681 CompileTask* task = _first;
682 while (task != NULL) {
683 task->mark_on_stack();
684 task = task->next();
685 }
686 }
687
688 // ------------------------------------------------------------------
689 // CompileQueue::print
690 void CompileQueue::print() {
691 tty->print_cr("Contents of %s", name());
692 tty->print_cr("----------------------");
693 CompileTask* task = _first;
694 while (task != NULL) {
695 task->print_line();
696 task = task->next();
697 }
698 tty->print_cr("----------------------");
699 }
700
701 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
702
703 _current_method[0] = '\0';
704 _compile_type = CompileBroker::no_compile;
705
706 if (UsePerfData) {
707 ResourceMark rm;
708
709 // create the thread instance name space string - don't create an
710 // instance subspace if instance is -1 - keeps the adapterThread
711 // counters from having a ".0" namespace.
712 const char* thread_i = (instance == -1) ? thread_name :
713 PerfDataManager::name_space(thread_name, instance);
714
715
716 char* name = PerfDataManager::counter_name(thread_i, "method");
717 _perf_current_method =
718 PerfDataManager::create_string_variable(SUN_CI, name,
719 cmname_buffer_length,
720 _current_method, CHECK);
721
722 name = PerfDataManager::counter_name(thread_i, "type");
723 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
724 PerfData::U_None,
725 (jlong)_compile_type,
726 CHECK);
727
728 name = PerfDataManager::counter_name(thread_i, "time");
729 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
730 PerfData::U_Ticks, CHECK);
731
732 name = PerfDataManager::counter_name(thread_i, "compiles");
733 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
734 PerfData::U_Events, CHECK);
735 }
736 }
737
738 // ------------------------------------------------------------------
739 // CompileBroker::compilation_init
740 //
741 // Initialize the Compilation object
742 void CompileBroker::compilation_init() {
743 _last_method_compiled[0] = '\0';
744
745 #ifndef SHARK
746 // Set the interface to the current compiler(s).
747 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
748 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
749 #ifdef COMPILER1
750 if (c1_count > 0) {
751 _compilers[0] = new Compiler();
752 }
753 #endif // COMPILER1
754
755 #ifdef COMPILER2
756 if (c2_count > 0) {
757 _compilers[1] = new C2Compiler();
758 }
759 #endif // COMPILER2
760
761 #else // SHARK
762 int c1_count = 0;
763 int c2_count = 1;
764
765 _compilers[1] = new SharkCompiler();
766 #endif // SHARK
767
768 // Initialize the CompileTask free list
769 _task_free_list = NULL;
770
771 // Start the CompilerThreads
772 init_compiler_threads(c1_count, c2_count);
773 // totalTime performance counter is always created as it is required
774 // by the implementation of java.lang.management.CompilationMBean.
775 {
776 EXCEPTION_MARK;
777 _perf_total_compilation =
778 PerfDataManager::create_counter(JAVA_CI, "totalTime",
779 PerfData::U_Ticks, CHECK);
780 }
781
782
783 if (UsePerfData) {
784
785 EXCEPTION_MARK;
786
787 // create the jvmstat performance counters
788 _perf_osr_compilation =
789 PerfDataManager::create_counter(SUN_CI, "osrTime",
790 PerfData::U_Ticks, CHECK);
791
792 _perf_standard_compilation =
793 PerfDataManager::create_counter(SUN_CI, "standardTime",
794 PerfData::U_Ticks, CHECK);
795
796 _perf_total_bailout_count =
797 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
798 PerfData::U_Events, CHECK);
799
800 _perf_total_invalidated_count =
801 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
802 PerfData::U_Events, CHECK);
803
804 _perf_total_compile_count =
805 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
806 PerfData::U_Events, CHECK);
807 _perf_total_osr_compile_count =
808 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
809 PerfData::U_Events, CHECK);
810
811 _perf_total_standard_compile_count =
812 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
813 PerfData::U_Events, CHECK);
814
815 _perf_sum_osr_bytes_compiled =
816 PerfDataManager::create_counter(SUN_CI, "osrBytes",
817 PerfData::U_Bytes, CHECK);
818
819 _perf_sum_standard_bytes_compiled =
820 PerfDataManager::create_counter(SUN_CI, "standardBytes",
821 PerfData::U_Bytes, CHECK);
822
823 _perf_sum_nmethod_size =
824 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
825 PerfData::U_Bytes, CHECK);
826
827 _perf_sum_nmethod_code_size =
828 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
829 PerfData::U_Bytes, CHECK);
830
831 _perf_last_method =
832 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
833 CompilerCounters::cmname_buffer_length,
834 "", CHECK);
835
836 _perf_last_failed_method =
837 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
838 CompilerCounters::cmname_buffer_length,
839 "", CHECK);
840
841 _perf_last_invalidated_method =
842 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
843 CompilerCounters::cmname_buffer_length,
844 "", CHECK);
845
846 _perf_last_compile_type =
847 PerfDataManager::create_variable(SUN_CI, "lastType",
848 PerfData::U_None,
849 (jlong)CompileBroker::no_compile,
850 CHECK);
851
852 _perf_last_compile_size =
853 PerfDataManager::create_variable(SUN_CI, "lastSize",
854 PerfData::U_Bytes,
855 (jlong)CompileBroker::no_compile,
856 CHECK);
857
858
859 _perf_last_failed_type =
860 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
861 PerfData::U_None,
862 (jlong)CompileBroker::no_compile,
863 CHECK);
864
865 _perf_last_invalidated_type =
866 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
867 PerfData::U_None,
868 (jlong)CompileBroker::no_compile,
869 CHECK);
870 }
871
872 _initialized = true;
873 }
874
875
876
877 // ------------------------------------------------------------------
878 // CompileBroker::make_compiler_thread
879 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
880 CompilerThread* compiler_thread = NULL;
881
882 Klass* k =
883 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
884 true, CHECK_0);
885 instanceKlassHandle klass (THREAD, k);
886 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
887 Handle string = java_lang_String::create_from_str(name, CHECK_0);
888
889 // Initialize thread_oop to put it into the system threadGroup
890 Handle thread_group (THREAD, Universe::system_thread_group());
891 JavaValue result(T_VOID);
892 JavaCalls::call_special(&result, thread_oop,
893 klass,
894 vmSymbols::object_initializer_name(),
895 vmSymbols::threadgroup_string_void_signature(),
896 thread_group,
897 string,
898 CHECK_0);
899
900 {
901 MutexLocker mu(Threads_lock, THREAD);
902 compiler_thread = new CompilerThread(queue, counters);
903 // At this point the new CompilerThread data-races with this startup
904 // thread (which I believe is the primoridal thread and NOT the VM
905 // thread). This means Java bytecodes being executed at startup can
906 // queue compile jobs which will run at whatever default priority the
907 // newly created CompilerThread runs at.
908
909
910 // At this point it may be possible that no osthread was created for the
911 // JavaThread due to lack of memory. We would have to throw an exception
912 // in that case. However, since this must work and we do not allow
913 // exceptions anyway, check and abort if this fails.
914
915 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
916 vm_exit_during_initialization("java.lang.OutOfMemoryError",
917 "unable to create new native thread");
918 }
919
920 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
921
922 // Note that this only sets the JavaThread _priority field, which by
923 // definition is limited to Java priorities and not OS priorities.
924 // The os-priority is set in the CompilerThread startup code itself
925
926 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
927
928 // Note that we cannot call os::set_priority because it expects Java
929 // priorities and we are *explicitly* using OS priorities so that it's
930 // possible to set the compiler thread priority higher than any Java
931 // thread.
932
933 int native_prio = CompilerThreadPriority;
934 if (native_prio == -1) {
935 if (UseCriticalCompilerThreadPriority) {
936 native_prio = os::java_to_os_priority[CriticalPriority];
937 } else {
938 native_prio = os::java_to_os_priority[NearMaxPriority];
939 }
940 }
941 os::set_native_priority(compiler_thread, native_prio);
942
943 java_lang_Thread::set_daemon(thread_oop());
944
945 compiler_thread->set_threadObj(thread_oop());
946 Threads::add(compiler_thread);
947 Thread::start(compiler_thread);
948 }
949
950 // Let go of Threads_lock before yielding
951 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
952
953 return compiler_thread;
954 }
955
956
957 // ------------------------------------------------------------------
958 // CompileBroker::init_compiler_threads
959 //
960 // Initialize the compilation queue
961 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
962 EXCEPTION_MARK;
963 #if !defined(ZERO) && !defined(SHARK)
964 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
965 #endif // !ZERO && !SHARK
966 if (c2_compiler_count > 0) {
967 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
968 }
969 if (c1_compiler_count > 0) {
970 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
971 }
972
973 int compiler_count = c1_compiler_count + c2_compiler_count;
974
975 _method_threads =
976 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
977
978 char name_buffer[256];
979 for (int i = 0; i < c2_compiler_count; i++) {
980 // Create a name for our thread.
981 sprintf(name_buffer, "C2 CompilerThread%d", i);
982 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
983 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
984 _method_threads->append(new_thread);
985 }
986
987 for (int i = c2_compiler_count; i < compiler_count; i++) {
988 // Create a name for our thread.
989 sprintf(name_buffer, "C1 CompilerThread%d", i);
990 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
991 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
992 _method_threads->append(new_thread);
993 }
994
995 if (UsePerfData) {
996 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
997 compiler_count, CHECK);
998 }
999 }
1000
1001
1002 // Set the methods on the stack as on_stack so that redefine classes doesn't
1003 // reclaim them
1004 void CompileBroker::mark_on_stack() {
1005 if (_c2_method_queue != NULL) {
1006 _c2_method_queue->mark_on_stack();
1007 }
1008 if (_c1_method_queue != NULL) {
1009 _c1_method_queue->mark_on_stack();
1010 }
1011 }
1012
1013 // ------------------------------------------------------------------
1014 // CompileBroker::is_idle
1015 bool CompileBroker::is_idle() {
1016 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
1017 return false;
1018 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
1019 return false;
1020 } else {
1021 int num_threads = _method_threads->length();
1022 for (int i=0; i<num_threads; i++) {
1023 if (_method_threads->at(i)->task() != NULL) {
1024 return false;
1025 }
1026 }
1027
1028 // No pending or active compilations.
1029 return true;
1030 }
1031 }
1032
1033
1034 // ------------------------------------------------------------------
1035 // CompileBroker::compile_method
1036 //
1037 // Request compilation of a method.
1038 void CompileBroker::compile_method_base(methodHandle method,
1039 int osr_bci,
1040 int comp_level,
1041 methodHandle hot_method,
1042 int hot_count,
1043 const char* comment,
1044 Thread* thread) {
1045 // do nothing if compiler thread(s) is not available
1046 if (!_initialized ) {
1047 return;
1048 }
1049
1050 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1051 assert(method->method_holder()->oop_is_instance(),
1052 "sanity check");
1053 assert(!method->method_holder()->is_not_initialized(),
1054 "method holder must be initialized");
1055 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1056
1057 if (CIPrintRequests) {
1058 tty->print("request: ");
1059 method->print_short_name(tty);
1060 if (osr_bci != InvocationEntryBci) {
1061 tty->print(" osr_bci: %d", osr_bci);
1062 }
1063 tty->print(" comment: %s count: %d", comment, hot_count);
1064 if (!hot_method.is_null()) {
1065 tty->print(" hot: ");
1066 if (hot_method() != method()) {
1067 hot_method->print_short_name(tty);
1068 } else {
1069 tty->print("yes");
1070 }
1071 }
1072 tty->cr();
1073 }
1074
1075 // A request has been made for compilation. Before we do any
1076 // real work, check to see if the method has been compiled
1077 // in the meantime with a definitive result.
1078 if (compilation_is_complete(method, osr_bci, comp_level)) {
1079 return;
1080 }
1081
1082 #ifndef PRODUCT
1083 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1084 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1085 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1086 return;
1087 }
1088 }
1089 #endif
1090
1091 // If this method is already in the compile queue, then
1092 // we do not block the current thread.
1093 if (compilation_is_in_queue(method, osr_bci)) {
1094 // We may want to decay our counter a bit here to prevent
1095 // multiple denied requests for compilation. This is an
1096 // open compilation policy issue. Note: The other possibility,
1097 // in the case that this is a blocking compile request, is to have
1098 // all subsequent blocking requesters wait for completion of
1099 // ongoing compiles. Note that in this case we'll need a protocol
1100 // for freeing the associated compile tasks. [Or we could have
1101 // a single static monitor on which all these waiters sleep.]
1102 return;
1103 }
1104
1105 // If the requesting thread is holding the pending list lock
1106 // then we just return. We can't risk blocking while holding
1107 // the pending list lock or a 3-way deadlock may occur
1108 // between the reference handler thread, a GC (instigated
1109 // by a compiler thread), and compiled method registration.
1110 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1111 return;
1112 }
1113
1114 // Outputs from the following MutexLocker block:
1115 CompileTask* task = NULL;
1116 bool blocking = false;
1117 CompileQueue* queue = compile_queue(comp_level);
1118
1119 // Acquire our lock.
1120 {
1121 MutexLocker locker(queue->lock(), thread);
1122
1123 // Make sure the method has not slipped into the queues since
1124 // last we checked; note that those checks were "fast bail-outs".
1125 // Here we need to be more careful, see 14012000 below.
1126 if (compilation_is_in_queue(method, osr_bci)) {
1127 return;
1128 }
1129
1130 // We need to check again to see if the compilation has
1131 // completed. A previous compilation may have registered
1132 // some result.
1133 if (compilation_is_complete(method, osr_bci, comp_level)) {
1134 return;
1135 }
1136
1137 // We now know that this compilation is not pending, complete,
1138 // or prohibited. Assign a compile_id to this compilation
1139 // and check to see if it is in our [Start..Stop) range.
1140 uint compile_id = assign_compile_id(method, osr_bci);
1141 if (compile_id == 0) {
1142 // The compilation falls outside the allowed range.
1143 return;
1144 }
1145
1146 // Should this thread wait for completion of the compile?
1147 blocking = is_compile_blocking(method, osr_bci);
1148
1149 // We will enter the compilation in the queue.
1150 // 14012000: Note that this sets the queued_for_compile bits in
1151 // the target method. We can now reason that a method cannot be
1152 // queued for compilation more than once, as follows:
1153 // Before a thread queues a task for compilation, it first acquires
1154 // the compile queue lock, then checks if the method's queued bits
1155 // are set or it has already been compiled. Thus there can not be two
1156 // instances of a compilation task for the same method on the
1157 // compilation queue. Consider now the case where the compilation
1158 // thread has already removed a task for that method from the queue
1159 // and is in the midst of compiling it. In this case, the
1160 // queued_for_compile bits must be set in the method (and these
1161 // will be visible to the current thread, since the bits were set
1162 // under protection of the compile queue lock, which we hold now.
1163 // When the compilation completes, the compiler thread first sets
1164 // the compilation result and then clears the queued_for_compile
1165 // bits. Neither of these actions are protected by a barrier (or done
1166 // under the protection of a lock), so the only guarantee we have
1167 // (on machines with TSO (Total Store Order)) is that these values
1168 // will update in that order. As a result, the only combinations of
1169 // these bits that the current thread will see are, in temporal order:
1170 // <RESULT, QUEUE> :
1171 // <0, 1> : in compile queue, but not yet compiled
1172 // <1, 1> : compiled but queue bit not cleared
1173 // <1, 0> : compiled and queue bit cleared
1174 // Because we first check the queue bits then check the result bits,
1175 // we are assured that we cannot introduce a duplicate task.
1176 // Note that if we did the tests in the reverse order (i.e. check
1177 // result then check queued bit), we could get the result bit before
1178 // the compilation completed, and the queue bit after the compilation
1179 // completed, and end up introducing a "duplicate" (redundant) task.
1180 // In that case, the compiler thread should first check if a method
1181 // has already been compiled before trying to compile it.
1182 // NOTE: in the event that there are multiple compiler threads and
1183 // there is de-optimization/recompilation, things will get hairy,
1184 // and in that case it's best to protect both the testing (here) of
1185 // these bits, and their updating (here and elsewhere) under a
1186 // common lock.
1187 task = create_compile_task(queue,
1188 compile_id, method,
1189 osr_bci, comp_level,
1190 hot_method, hot_count, comment,
1191 blocking);
1192 }
1193
1194 if (blocking) {
1195 wait_for_completion(task);
1196 }
1197 }
1198
1199
1200 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1201 int comp_level,
1202 methodHandle hot_method, int hot_count,
1203 const char* comment, Thread* THREAD) {
1204 // make sure arguments make sense
1205 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1206 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1207 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1208 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1209 // allow any levels for WhiteBox
1210 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1211 // return quickly if possible
1212
1213 // lock, make sure that the compilation
1214 // isn't prohibited in a straightforward way.
1215 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1216 if (comp == NULL || !comp->can_compile_method(method) ||
1217 compilation_is_prohibited(method, osr_bci, comp_level)) {
1218 return NULL;
1219 }
1220
1221 if (osr_bci == InvocationEntryBci) {
1222 // standard compilation
1223 nmethod* method_code = method->code();
1224 if (method_code != NULL) {
1225 if (compilation_is_complete(method, osr_bci, comp_level)) {
1226 return method_code;
1227 }
1228 }
1229 if (method->is_not_compilable(comp_level)) return NULL;
1230
1231 if (UseCodeCacheFlushing) {
1232 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1233 if (saved != NULL) {
1234 method->set_code(method, saved);
1235 return saved;
1236 }
1237 }
1238
1239 } else {
1240 // osr compilation
1241 #ifndef TIERED
1242 // seems like an assert of dubious value
1243 assert(comp_level == CompLevel_highest_tier,
1244 "all OSR compiles are assumed to be at a single compilation lavel");
1245 #endif // TIERED
1246 // We accept a higher level osr method
1247 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1248 if (nm != NULL) return nm;
1249 if (method->is_not_osr_compilable(comp_level)) return NULL;
1250 }
1251
1252 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1253 // some prerequisites that are compiler specific
1254 if (comp->is_c2() || comp->is_shark()) {
1255 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1256 // Resolve all classes seen in the signature of the method
1257 // we are compiling.
1258 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1259 }
1260
1261 // If the method is native, do the lookup in the thread requesting
1262 // the compilation. Native lookups can load code, which is not
1263 // permitted during compilation.
1264 //
1265 // Note: A native method implies non-osr compilation which is
1266 // checked with an assertion at the entry of this method.
1267 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1268 bool in_base_library;
1269 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1270 if (HAS_PENDING_EXCEPTION) {
1271 // In case of an exception looking up the method, we just forget
1272 // about it. The interpreter will kick-in and throw the exception.
1273 method->set_not_compilable(); // implies is_not_osr_compilable()
1274 CLEAR_PENDING_EXCEPTION;
1275 return NULL;
1276 }
1277 assert(method->has_native_function(), "must have native code by now");
1278 }
1279
1280 // RedefineClasses() has replaced this method; just return
1281 if (method->is_old()) {
1282 return NULL;
1283 }
1284
1285 // JVMTI -- post_compile_event requires jmethod_id() that may require
1286 // a lock the compiling thread can not acquire. Prefetch it here.
1287 if (JvmtiExport::should_post_compiled_method_load()) {
1288 method->jmethod_id();
1289 }
1290
1291 // If the compiler is shut off due to code cache flushing or otherwise,
1292 // fail out now so blocking compiles dont hang the java thread
1293 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1294 CompilationPolicy::policy()->delay_compilation(method());
1295 return NULL;
1296 }
1297
1298 // do the compilation
1299 if (method->is_native()) {
1300 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1301 // Acquire our lock.
1302 int compile_id;
1303 {
1304 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1305 compile_id = assign_compile_id(method, standard_entry_bci);
1306 }
1307 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1308 } else {
1309 return NULL;
1310 }
1311 } else {
1312 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1313 }
1314
1315 // return requested nmethod
1316 // We accept a higher level osr method
1317 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1318 }
1319
1320
1321 // ------------------------------------------------------------------
1322 // CompileBroker::compilation_is_complete
1323 //
1324 // See if compilation of this method is already complete.
1325 bool CompileBroker::compilation_is_complete(methodHandle method,
1326 int osr_bci,
1327 int comp_level) {
1328 bool is_osr = (osr_bci != standard_entry_bci);
1329 if (is_osr) {
1330 if (method->is_not_osr_compilable(comp_level)) {
1331 return true;
1332 } else {
1333 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1334 return (result != NULL);
1335 }
1336 } else {
1337 if (method->is_not_compilable(comp_level)) {
1338 return true;
1339 } else {
1340 nmethod* result = method->code();
1341 if (result == NULL) return false;
1342 return comp_level == result->comp_level();
1343 }
1344 }
1345 }
1346
1347
1348 // ------------------------------------------------------------------
1349 // CompileBroker::compilation_is_in_queue
1350 //
1351 // See if this compilation is already requested.
1352 //
1353 // Implementation note: there is only a single "is in queue" bit
1354 // for each method. This means that the check below is overly
1355 // conservative in the sense that an osr compilation in the queue
1356 // will block a normal compilation from entering the queue (and vice
1357 // versa). This can be remedied by a full queue search to disambiguate
1358 // cases. If it is deemed profitible, this may be done.
1359 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1360 int osr_bci) {
1361 return method->queued_for_compilation();
1362 }
1363
1364 // ------------------------------------------------------------------
1365 // CompileBroker::compilation_is_prohibited
1366 //
1367 // See if this compilation is not allowed.
1368 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1369 bool is_native = method->is_native();
1370 // Some compilers may not support the compilation of natives.
1371 AbstractCompiler *comp = compiler(comp_level);
1372 if (is_native &&
1373 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1374 method->set_not_compilable_quietly(comp_level);
1375 return true;
1376 }
1377
1378 bool is_osr = (osr_bci != standard_entry_bci);
1379 // Some compilers may not support on stack replacement.
1380 if (is_osr &&
1381 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1382 method->set_not_osr_compilable(comp_level);
1383 return true;
1384 }
1385
1386 // The method may be explicitly excluded by the user.
1387 bool quietly;
1388 if (CompilerOracle::should_exclude(method, quietly)) {
1389 if (!quietly) {
1390 // This does not happen quietly...
1391 ResourceMark rm;
1392 tty->print("### Excluding %s:%s",
1393 method->is_native() ? "generation of native wrapper" : "compile",
1394 (method->is_static() ? " static" : ""));
1395 method->print_short_name(tty);
1396 tty->cr();
1397 }
1398 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1399 }
1400
1401 return false;
1402 }
1403
1404
1405 // ------------------------------------------------------------------
1406 // CompileBroker::assign_compile_id
1407 //
1408 // Assign a serialized id number to this compilation request. If the
1409 // number falls out of the allowed range, return a 0. OSR
1410 // compilations may be numbered separately from regular compilations
1411 // if certain debugging flags are used.
1412 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1413 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1414 "must hold the compilation queue lock");
1415 bool is_osr = (osr_bci != standard_entry_bci);
1416 uint id;
1417 if (CICountOSR && is_osr) {
1418 id = ++_osr_compilation_id;
1419 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1420 return id;
1421 }
1422 } else {
1423 id = ++_compilation_id;
1424 if ((uint)CIStart <= id && id < (uint)CIStop) {
1425 return id;
1426 }
1427 }
1428
1429 // Method was not in the appropriate compilation range.
1430 method->set_not_compilable_quietly();
1431 return 0;
1432 }
1433
1434
1435 // ------------------------------------------------------------------
1436 // CompileBroker::is_compile_blocking
1437 //
1438 // Should the current thread be blocked until this compilation request
1439 // has been fulfilled?
1440 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1441 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1442 return !BackgroundCompilation;
1443 }
1444
1445
1446 // ------------------------------------------------------------------
1447 // CompileBroker::preload_classes
1448 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1449 // Move this code over from c1_Compiler.cpp
1450 ShouldNotReachHere();
1451 }
1452
1453
1454 // ------------------------------------------------------------------
1455 // CompileBroker::create_compile_task
1456 //
1457 // Create a CompileTask object representing the current request for
1458 // compilation. Add this task to the queue.
1459 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1460 int compile_id,
1461 methodHandle method,
1462 int osr_bci,
1463 int comp_level,
1464 methodHandle hot_method,
1465 int hot_count,
1466 const char* comment,
1467 bool blocking) {
1468 CompileTask* new_task = allocate_task();
1469 new_task->initialize(compile_id, method, osr_bci, comp_level,
1470 hot_method, hot_count, comment,
1471 blocking);
1472 queue->add(new_task);
1473 return new_task;
1474 }
1475
1476
1477 // ------------------------------------------------------------------
1478 // CompileBroker::allocate_task
1479 //
1480 // Allocate a CompileTask, from the free list if possible.
1481 CompileTask* CompileBroker::allocate_task() {
1482 MutexLocker locker(CompileTaskAlloc_lock);
1483 CompileTask* task = NULL;
1484 if (_task_free_list != NULL) {
1485 task = _task_free_list;
1486 _task_free_list = task->next();
1487 task->set_next(NULL);
1488 } else {
1489 task = new CompileTask();
1490 task->set_next(NULL);
1491 }
1492 return task;
1493 }
1494
1495
1496 // ------------------------------------------------------------------
1497 // CompileBroker::free_task
1498 //
1499 // Add a task to the free list.
1500 void CompileBroker::free_task(CompileTask* task) {
1501 MutexLocker locker(CompileTaskAlloc_lock);
1502 task->free();
1503 task->set_next(_task_free_list);
1504 _task_free_list = task;
1505 }
1506
1507
1508 // ------------------------------------------------------------------
1509 // CompileBroker::wait_for_completion
1510 //
1511 // Wait for the given method CompileTask to complete.
1512 void CompileBroker::wait_for_completion(CompileTask* task) {
1513 if (CIPrintCompileQueue) {
1514 tty->print_cr("BLOCKING FOR COMPILE");
1515 }
1516
1517 assert(task->is_blocking(), "can only wait on blocking task");
1518
1519 JavaThread *thread = JavaThread::current();
1520 thread->set_blocked_on_compilation(true);
1521
1522 methodHandle method(thread, task->method());
1523 {
1524 MutexLocker waiter(task->lock(), thread);
1525
1526 while (!task->is_complete())
1527 task->lock()->wait();
1528 }
1529 // It is harmless to check this status without the lock, because
1530 // completion is a stable property (until the task object is recycled).
1531 assert(task->is_complete(), "Compilation should have completed");
1532 assert(task->code_handle() == NULL, "must be reset");
1533
1534 thread->set_blocked_on_compilation(false);
1535
1536 // By convention, the waiter is responsible for recycling a
1537 // blocking CompileTask. Since there is only one waiter ever
1538 // waiting on a CompileTask, we know that no one else will
1539 // be using this CompileTask; we can free it.
1540 free_task(task);
1541 }
1542
1543 // ------------------------------------------------------------------
1544 // CompileBroker::compiler_thread_loop
1545 //
1546 // The main loop run by a CompilerThread.
1547 void CompileBroker::compiler_thread_loop() {
1548 CompilerThread* thread = CompilerThread::current();
1549 CompileQueue* queue = thread->queue();
1550
1551 // For the thread that initializes the ciObjectFactory
1552 // this resource mark holds all the shared objects
1553 ResourceMark rm;
1554
1555 // First thread to get here will initialize the compiler interface
1556
1557 if (!ciObjectFactory::is_initialized()) {
1558 ASSERT_IN_VM;
1559 MutexLocker only_one (CompileThread_lock, thread);
1560 if (!ciObjectFactory::is_initialized()) {
1561 ciObjectFactory::initialize();
1562 }
1563 }
1564
1565 // Open a log.
1566 if (LogCompilation) {
1567 init_compiler_thread_log();
1568 }
1569 CompileLog* log = thread->log();
1570 if (log != NULL) {
1571 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1572 thread->name(),
1573 os::current_thread_id(),
1574 os::current_process_id());
1575 log->stamp();
1576 log->end_elem();
1577 }
1578
1579 while (true) {
1580 {
1581 // We need this HandleMark to avoid leaking VM handles.
1582 HandleMark hm(thread);
1583
1584 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1585 // the code cache is really full
1586 handle_full_code_cache();
1587 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1588 // Attempt to start cleaning the code cache while there is still a little headroom
1589 NMethodSweeper::handle_full_code_cache(false);
1590 }
1591
1592 CompileTask* task = queue->get();
1593
1594 // Give compiler threads an extra quanta. They tend to be bursty and
1595 // this helps the compiler to finish up the job.
1596 if( CompilerThreadHintNoPreempt )
1597 os::hint_no_preempt();
1598
1599 // trace per thread time and compile statistics
1600 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1601 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1602
1603 // Assign the task to the current thread. Mark this compilation
1604 // thread as active for the profiler.
1605 CompileTaskWrapper ctw(task);
1606 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1607 task->set_code_handle(&result_handle);
1608 methodHandle method(thread, task->method());
1609
1610 // Never compile a method if breakpoints are present in it
1611 if (method()->number_of_breakpoints() == 0) {
1612 // Compile the method.
1613 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1614 #ifdef COMPILER1
1615 // Allow repeating compilations for the purpose of benchmarking
1616 // compile speed. This is not useful for customers.
1617 if (CompilationRepeat != 0) {
1618 int compile_count = CompilationRepeat;
1619 while (compile_count > 0) {
1620 invoke_compiler_on_method(task);
1621 nmethod* nm = method->code();
1622 if (nm != NULL) {
1623 nm->make_zombie();
1624 method->clear_code();
1625 }
1626 compile_count--;
1627 }
1628 }
1629 #endif /* COMPILER1 */
1630 invoke_compiler_on_method(task);
1631 } else {
1632 // After compilation is disabled, remove remaining methods from queue
1633 method->clear_queued_for_compilation();
1634 }
1635 }
1636 }
1637 }
1638 }
1639
1640
1641 // ------------------------------------------------------------------
1642 // CompileBroker::init_compiler_thread_log
1643 //
1644 // Set up state required by +LogCompilation.
1645 void CompileBroker::init_compiler_thread_log() {
1646 CompilerThread* thread = CompilerThread::current();
1647 char fileBuf[4*K];
1648 FILE* fp = NULL;
1649 char* file = 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(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1655 thread_id, os::current_process_id());
1656 } else {
1657 jio_snprintf(fileBuf, sizeof(fileBuf),
1658 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1659 os::file_separator(), thread_id, os::current_process_id());
1660 }
1661 fp = fopen(fileBuf, "at");
1662 if (fp != NULL) {
1663 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler);
1664 strcpy(file, fileBuf);
1665 break;
1666 }
1667 }
1668 if (fp == NULL) {
1669 warning("Cannot open log file: %s", fileBuf);
1670 } else {
1671 if (LogCompilation && Verbose)
1672 tty->print_cr("Opening compilation log %s", file);
1673 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id);
1674 thread->init_log(log);
1675
1676 if (xtty != NULL) {
1677 ttyLocker ttyl;
1678
1679 // Record any per thread log files
1680 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1681 }
1682 }
1683 }
1684
1685 // ------------------------------------------------------------------
1686 // CompileBroker::set_should_block
1687 //
1688 // Set _should_block.
1689 // Call this from the VM, with Threads_lock held and a safepoint requested.
1690 void CompileBroker::set_should_block() {
1691 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1692 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1693 #ifndef PRODUCT
1694 if (PrintCompilation && (Verbose || WizardMode))
1695 tty->print_cr("notifying compiler thread pool to block");
1696 #endif
1697 _should_block = true;
1698 }
1699
1700 // ------------------------------------------------------------------
1701 // CompileBroker::maybe_block
1702 //
1703 // Call this from the compiler at convenient points, to poll for _should_block.
1704 void CompileBroker::maybe_block() {
1705 if (_should_block) {
1706 #ifndef PRODUCT
1707 if (PrintCompilation && (Verbose || WizardMode))
1708 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1709 #endif
1710 ThreadInVMfromNative tivfn(JavaThread::current());
1711 }
1712 }
1713
1714 // wrapper for CodeCache::print_summary()
1715 static void codecache_print(bool detailed)
1716 {
1717 ResourceMark rm;
1718 stringStream s;
1719 // Dump code cache into a buffer before locking the tty,
1720 {
1721 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1722 CodeCache::print_summary(&s, detailed);
1723 }
1724 ttyLocker ttyl;
1725 tty->print_cr(s.as_string());
1726 }
1727
1728 // ------------------------------------------------------------------
1729 // CompileBroker::invoke_compiler_on_method
1730 //
1731 // Compile a method.
1732 //
1733 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1734 if (PrintCompilation) {
1735 ResourceMark rm;
1736 task->print_line();
1737 }
1738 elapsedTimer time;
1739
1740 CompilerThread* thread = CompilerThread::current();
1741 ResourceMark rm(thread);
1742
1743 if (LogEvents) {
1744 _compilation_log->log_compile(thread, task);
1745 }
1746
1747 // Common flags.
1748 uint compile_id = task->compile_id();
1749 int osr_bci = task->osr_bci();
1750 bool is_osr = (osr_bci != standard_entry_bci);
1751 bool should_log = (thread->log() != NULL);
1752 bool should_break = false;
1753 int task_level = task->comp_level();
1754 {
1755 // create the handle inside it's own block so it can't
1756 // accidentally be referenced once the thread transitions to
1757 // native. The NoHandleMark before the transition should catch
1758 // any cases where this occurs in the future.
1759 methodHandle method(thread, task->method());
1760 should_break = check_break_at(method, compile_id, is_osr);
1761 if (should_log && !CompilerOracle::should_log(method)) {
1762 should_log = false;
1763 }
1764 assert(!method->is_native(), "no longer compile natives");
1765
1766 // Save information about this method in case of failure.
1767 set_last_compile(thread, method, is_osr, task_level);
1768
1769 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task_level), method,
1770 compiler_name(task_level));
1771 }
1772
1773 // Allocate a new set of JNI handles.
1774 push_jni_handle_block();
1775 Method* target_handle = task->method();
1776 int compilable = ciEnv::MethodCompilable;
1777 {
1778 int system_dictionary_modification_counter;
1779 {
1780 MutexLocker locker(Compile_lock, thread);
1781 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1782 }
1783
1784 NoHandleMark nhm;
1785 ThreadToNativeFromVM ttn(thread);
1786
1787 ciEnv ci_env(task, system_dictionary_modification_counter);
1788 if (should_break) {
1789 ci_env.set_break_at_compile(true);
1790 }
1791 if (should_log) {
1792 ci_env.set_log(thread->log());
1793 }
1794 assert(thread->env() == &ci_env, "set by ci_env");
1795 // The thread-env() field is cleared in ~CompileTaskWrapper.
1796
1797 // Cache Jvmti state
1798 ci_env.cache_jvmti_state();
1799
1800 // Cache DTrace flags
1801 ci_env.cache_dtrace_flags();
1802
1803 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1804
1805 TraceTime t1("compilation", &time);
1806
1807 AbstractCompiler *comp = compiler(task_level);
1808 if (comp == NULL) {
1809 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1810 } else {
1811 comp->compile_method(&ci_env, target, osr_bci);
1812 }
1813
1814 if (!ci_env.failing() && task->code() == NULL) {
1815 //assert(false, "compiler should always document failure");
1816 // The compiler elected, without comment, not to register a result.
1817 // Do not attempt further compilations of this method.
1818 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1819 }
1820
1821 // Copy this bit to the enclosing block:
1822 compilable = ci_env.compilable();
1823
1824 if (ci_env.failing()) {
1825 const char* retry_message = ci_env.retry_message();
1826 if (_compilation_log != NULL) {
1827 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1828 }
1829 if (PrintCompilation) {
1830 FormatBufferResource msg = retry_message != NULL ?
1831 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1832 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1833 task->print_compilation(tty, msg);
1834 }
1835 } else {
1836 task->mark_success();
1837 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1838 if (_compilation_log != NULL) {
1839 nmethod* code = task->code();
1840 if (code != NULL) {
1841 _compilation_log->log_nmethod(thread, code);
1842 }
1843 }
1844 }
1845 }
1846 pop_jni_handle_block();
1847
1848 methodHandle method(thread, task->method());
1849
1850 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task_level), method,
1851 compiler_name(task_level), task->is_success());
1852
1853 collect_statistics(thread, time, task);
1854
1855 if (PrintCompilation && PrintCompilation2) {
1856 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1857 tty->print("%4d ", compile_id); // print compilation number
1858 tty->print("%s ", (is_osr ? "%" : " "));
1859 if (task->code() != NULL) {
1860 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1861 }
1862 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1863 }
1864
1865 if (PrintCodeCacheOnCompilation)
1866 codecache_print(/* detailed= */ false);
1867
1868 // Disable compilation, if required.
1869 switch (compilable) {
1870 case ciEnv::MethodCompilable_never:
1871 if (is_osr)
1872 method->set_not_osr_compilable_quietly();
1873 else
1874 method->set_not_compilable_quietly();
1875 break;
1876 case ciEnv::MethodCompilable_not_at_tier:
1877 if (is_osr)
1878 method->set_not_osr_compilable_quietly(task_level);
1879 else
1880 method->set_not_compilable_quietly(task_level);
1881 break;
1882 }
1883
1884 // Note that the queued_for_compilation bits are cleared without
1885 // protection of a mutex. [They were set by the requester thread,
1886 // when adding the task to the complie queue -- at which time the
1887 // compile queue lock was held. Subsequently, we acquired the compile
1888 // queue lock to get this task off the compile queue; thus (to belabour
1889 // the point somewhat) our clearing of the bits must be occurring
1890 // only after the setting of the bits. See also 14012000 above.
1891 method->clear_queued_for_compilation();
1892
1893 #ifdef ASSERT
1894 if (CollectedHeap::fired_fake_oom()) {
1895 // The current compile received a fake OOM during compilation so
1896 // go ahead and exit the VM since the test apparently succeeded
1897 tty->print_cr("*** Shutting down VM after successful fake OOM");
1898 vm_exit(0);
1899 }
1900 #endif
1901 }
1902
1903 // ------------------------------------------------------------------
1904 // CompileBroker::handle_full_code_cache
1905 //
1906 // The CodeCache is full. Print out warning and disable compilation or
1907 // try code cache cleaning so compilation can continue later.
1908 void CompileBroker::handle_full_code_cache() {
1909 UseInterpreter = true;
1910 if (UseCompiler || AlwaysCompileLoopMethods ) {
1911 if (xtty != NULL) {
1912 ResourceMark rm;
1913 stringStream s;
1914 // Dump code cache state into a buffer before locking the tty,
1915 // because log_state() will use locks causing lock conflicts.
1916 CodeCache::log_state(&s);
1917 // Lock to prevent tearing
1918 ttyLocker ttyl;
1919 xtty->begin_elem("code_cache_full");
1920 xtty->print(s.as_string());
1921 xtty->stamp();
1922 xtty->end_elem();
1923 }
1924 warning("CodeCache is full. Compiler has been disabled.");
1925 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1926 #ifndef PRODUCT
1927 if (CompileTheWorld || ExitOnFullCodeCache) {
1928 codecache_print(/* detailed= */ true);
1929 before_exit(JavaThread::current());
1930 exit_globals(); // will delete tty
1931 vm_direct_exit(CompileTheWorld ? 0 : 1);
1932 }
1933 #endif
1934 if (UseCodeCacheFlushing) {
1935 NMethodSweeper::handle_full_code_cache(true);
1936 } else {
1937 UseCompiler = false;
1938 AlwaysCompileLoopMethods = false;
1939 }
1940 }
1941 codecache_print(/* detailed= */ true);
1942 }
1943
1944 // ------------------------------------------------------------------
1945 // CompileBroker::set_last_compile
1946 //
1947 // Record this compilation for debugging purposes.
1948 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1949 ResourceMark rm;
1950 char* method_name = method->name()->as_C_string();
1951 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1952 char current_method[CompilerCounters::cmname_buffer_length];
1953 size_t maxLen = CompilerCounters::cmname_buffer_length;
1954
1955 if (UsePerfData) {
1956 const char* class_name = method->method_holder()->name()->as_C_string();
1957
1958 size_t s1len = strlen(class_name);
1959 size_t s2len = strlen(method_name);
1960
1961 // check if we need to truncate the string
1962 if (s1len + s2len + 2 > maxLen) {
1963
1964 // the strategy is to lop off the leading characters of the
1965 // class name and the trailing characters of the method name.
1966
1967 if (s2len + 2 > maxLen) {
1968 // lop of the entire class name string, let snprintf handle
1969 // truncation of the method name.
1970 class_name += s1len; // null string
1971 }
1972 else {
1973 // lop off the extra characters from the front of the class name
1974 class_name += ((s1len + s2len + 2) - maxLen);
1975 }
1976 }
1977
1978 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1979 }
1980
1981 if (CICountOSR && is_osr) {
1982 _last_compile_type = osr_compile;
1983 } else {
1984 _last_compile_type = normal_compile;
1985 }
1986 _last_compile_level = comp_level;
1987
1988 if (UsePerfData) {
1989 CompilerCounters* counters = thread->counters();
1990 counters->set_current_method(current_method);
1991 counters->set_compile_type((jlong)_last_compile_type);
1992 }
1993 }
1994
1995
1996 // ------------------------------------------------------------------
1997 // CompileBroker::push_jni_handle_block
1998 //
1999 // Push on a new block of JNI handles.
2000 void CompileBroker::push_jni_handle_block() {
2001 JavaThread* thread = JavaThread::current();
2002
2003 // Allocate a new block for JNI handles.
2004 // Inlined code from jni_PushLocalFrame()
2005 JNIHandleBlock* java_handles = thread->active_handles();
2006 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2007 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2008 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2009 thread->set_active_handles(compile_handles);
2010 }
2011
2012
2013 // ------------------------------------------------------------------
2014 // CompileBroker::pop_jni_handle_block
2015 //
2016 // Pop off the current block of JNI handles.
2017 void CompileBroker::pop_jni_handle_block() {
2018 JavaThread* thread = JavaThread::current();
2019
2020 // Release our JNI handle block
2021 JNIHandleBlock* compile_handles = thread->active_handles();
2022 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2023 thread->set_active_handles(java_handles);
2024 compile_handles->set_pop_frame_link(NULL);
2025 JNIHandleBlock::release_block(compile_handles, thread); // may block
2026 }
2027
2028
2029 // ------------------------------------------------------------------
2030 // CompileBroker::check_break_at
2031 //
2032 // Should the compilation break at the current compilation.
2033 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2034 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2035 return true;
2036 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2037 return true;
2038 } else {
2039 return (compile_id == CIBreakAt);
2040 }
2041 }
2042
2043 // ------------------------------------------------------------------
2044 // CompileBroker::collect_statistics
2045 //
2046 // Collect statistics about the compilation.
2047
2048 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2049 bool success = task->is_success();
2050 methodHandle method (thread, task->method());
2051 uint compile_id = task->compile_id();
2052 bool is_osr = (task->osr_bci() != standard_entry_bci);
2053 nmethod* code = task->code();
2054 CompilerCounters* counters = thread->counters();
2055
2056 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2057 MutexLocker locker(CompileStatistics_lock);
2058
2059 // _perf variables are production performance counters which are
2060 // updated regardless of the setting of the CITime and CITimeEach flags
2061 //
2062 if (!success) {
2063 _total_bailout_count++;
2064 if (UsePerfData) {
2065 _perf_last_failed_method->set_value(counters->current_method());
2066 _perf_last_failed_type->set_value(counters->compile_type());
2067 _perf_total_bailout_count->inc();
2068 }
2069 } else if (code == NULL) {
2070 if (UsePerfData) {
2071 _perf_last_invalidated_method->set_value(counters->current_method());
2072 _perf_last_invalidated_type->set_value(counters->compile_type());
2073 _perf_total_invalidated_count->inc();
2074 }
2075 _total_invalidated_count++;
2076 } else {
2077 // Compilation succeeded
2078
2079 // update compilation ticks - used by the implementation of
2080 // java.lang.management.CompilationMBean
2081 _perf_total_compilation->inc(time.ticks());
2082
2083 if (CITime) {
2084 _t_total_compilation.add(time);
2085 if (is_osr) {
2086 _t_osr_compilation.add(time);
2087 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2088 } else {
2089 _t_standard_compilation.add(time);
2090 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2091 }
2092 }
2093
2094 if (UsePerfData) {
2095 // save the name of the last method compiled
2096 _perf_last_method->set_value(counters->current_method());
2097 _perf_last_compile_type->set_value(counters->compile_type());
2098 _perf_last_compile_size->set_value(method->code_size() +
2099 task->num_inlined_bytecodes());
2100 if (is_osr) {
2101 _perf_osr_compilation->inc(time.ticks());
2102 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2103 } else {
2104 _perf_standard_compilation->inc(time.ticks());
2105 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2106 }
2107 }
2108
2109 if (CITimeEach) {
2110 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2111 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2112 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2113 }
2114
2115 // Collect counts of successful compilations
2116 _sum_nmethod_size += code->total_size();
2117 _sum_nmethod_code_size += code->insts_size();
2118 _total_compile_count++;
2119
2120 if (UsePerfData) {
2121 _perf_sum_nmethod_size->inc( code->total_size());
2122 _perf_sum_nmethod_code_size->inc(code->insts_size());
2123 _perf_total_compile_count->inc();
2124 }
2125
2126 if (is_osr) {
2127 if (UsePerfData) _perf_total_osr_compile_count->inc();
2128 _total_osr_compile_count++;
2129 } else {
2130 if (UsePerfData) _perf_total_standard_compile_count->inc();
2131 _total_standard_compile_count++;
2132 }
2133 }
2134 // set the current method for the thread to null
2135 if (UsePerfData) counters->set_current_method("");
2136 }
2137
2138 const char* CompileBroker::compiler_name(int comp_level) {
2139 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2140 if (comp == NULL) {
2141 return "no compiler";
2142 } else {
2143 return (comp->name());
2144 }
2145 }
2146
2147 void CompileBroker::print_times() {
2148 tty->cr();
2149 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2150 tty->print_cr("------------------------------------------------");
2151 //0000000000111111111122222222223333333333444444444455555555556666666666
2152 //0123456789012345678901234567890123456789012345678901234567890123456789
2153 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2154 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2155 CompileBroker::_t_standard_compilation.seconds(),
2156 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2157 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);
2158
2159 AbstractCompiler *comp = compiler(CompLevel_simple);
2160 if (comp != NULL) {
2161 comp->print_timers();
2162 }
2163 comp = compiler(CompLevel_full_optimization);
2164 if (comp != NULL) {
2165 comp->print_timers();
2166 }
2167 tty->cr();
2168 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2169 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2170 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2171 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2172 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2173 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2174 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2175 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2176 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2177 tty->cr();
2178 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2179 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2180 }
2181
2182
2183 // Debugging output for failure
2184 void CompileBroker::print_last_compile() {
2185 if ( _last_compile_level != CompLevel_none &&
2186 compiler(_last_compile_level) != NULL &&
2187 _last_method_compiled != NULL &&
2188 _last_compile_type != no_compile) {
2189 if (_last_compile_type == osr_compile) {
2190 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2191 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2192 } else {
2193 tty->print_cr("Last parse: %d+++(%d) %s",
2194 _compilation_id, _last_compile_level, _last_method_compiled);
2195 }
2196 }
2197 }
2198
2199
2200 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2201 #ifndef PRODUCT
2202 st->print_cr("Compiler thread printing unimplemented.");
2203 st->cr();
2204 #endif
2205 }