Wed, 12 Dec 2012 11:39:29 -0500
8004883: NPG: clean up anonymous class fix
Summary: Add klass_holder() to return either mirror or class_loader depending on if the class is anonymous or not.
Reviewed-by: stefank, jrose
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 */
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
58 #ifdef DTRACE_ENABLED
60 // Only bother with this argument setup if dtrace is available
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);
68 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
69 { \
70 char* comp_name = (char*)(compiler)->name(); \
71 Symbol* klass_name = (method)->klass_name(); \
72 Symbol* name = (method)->name(); \
73 Symbol* signature = (method)->signature(); \
74 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
75 comp_name, strlen(comp_name), \
76 klass_name->bytes(), klass_name->utf8_length(), \
77 name->bytes(), name->utf8_length(), \
78 signature->bytes(), signature->utf8_length()); \
79 }
81 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
82 { \
83 char* comp_name = (char*)(compiler)->name(); \
84 Symbol* klass_name = (method)->klass_name(); \
85 Symbol* name = (method)->name(); \
86 Symbol* signature = (method)->signature(); \
87 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
88 comp_name, strlen(comp_name), \
89 klass_name->bytes(), klass_name->utf8_length(), \
90 name->bytes(), name->utf8_length(), \
91 signature->bytes(), signature->utf8_length(), (success)); \
92 }
94 #else /* USDT2 */
96 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
97 { \
98 char* comp_name = (char*)(compiler)->name(); \
99 Symbol* klass_name = (method)->klass_name(); \
100 Symbol* name = (method)->name(); \
101 Symbol* signature = (method)->signature(); \
102 HOTSPOT_METHOD_COMPILE_BEGIN( \
103 comp_name, strlen(comp_name), \
104 (char *) klass_name->bytes(), klass_name->utf8_length(), \
105 (char *) name->bytes(), name->utf8_length(), \
106 (char *) signature->bytes(), signature->utf8_length()); \
107 }
109 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
110 { \
111 char* comp_name = (char*)(compiler)->name(); \
112 Symbol* klass_name = (method)->klass_name(); \
113 Symbol* name = (method)->name(); \
114 Symbol* signature = (method)->signature(); \
115 HOTSPOT_METHOD_COMPILE_END( \
116 comp_name, strlen(comp_name), \
117 (char *) klass_name->bytes(), klass_name->utf8_length(), \
118 (char *) name->bytes(), name->utf8_length(), \
119 (char *) signature->bytes(), signature->utf8_length(), (success)); \
120 }
121 #endif /* USDT2 */
123 #else // ndef DTRACE_ENABLED
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
128 #endif // ndef DTRACE_ENABLED
130 bool CompileBroker::_initialized = false;
131 volatile bool CompileBroker::_should_block = false;
132 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
134 // The installed compiler(s)
135 AbstractCompiler* CompileBroker::_compilers[2];
137 // These counters are used for assigning id's to each compilation
138 uint CompileBroker::_compilation_id = 0;
139 uint CompileBroker::_osr_compilation_id = 0;
141 // Debugging information
142 int CompileBroker::_last_compile_type = no_compile;
143 int CompileBroker::_last_compile_level = CompLevel_none;
144 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
146 // Performance counters
147 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
148 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
149 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
151 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
153 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
154 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
155 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
157 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
158 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
159 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
160 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
162 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
163 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
164 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
165 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
166 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
167 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
168 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
170 // Timers and counters for generating statistics
171 elapsedTimer CompileBroker::_t_total_compilation;
172 elapsedTimer CompileBroker::_t_osr_compilation;
173 elapsedTimer CompileBroker::_t_standard_compilation;
175 int CompileBroker::_total_bailout_count = 0;
176 int CompileBroker::_total_invalidated_count = 0;
177 int CompileBroker::_total_compile_count = 0;
178 int CompileBroker::_total_osr_compile_count = 0;
179 int CompileBroker::_total_standard_compile_count = 0;
181 int CompileBroker::_sum_osr_bytes_compiled = 0;
182 int CompileBroker::_sum_standard_bytes_compiled = 0;
183 int CompileBroker::_sum_nmethod_size = 0;
184 int CompileBroker::_sum_nmethod_code_size = 0;
186 CompileQueue* CompileBroker::_c2_method_queue = NULL;
187 CompileQueue* CompileBroker::_c1_method_queue = NULL;
188 CompileTask* CompileBroker::_task_free_list = NULL;
190 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream sstr = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print_compilation(&sstr, NULL, true);
203 log(thread, "%s", (const char*)lm);
204 }
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm->compile_id(), nm->is_osr_method() ? "%" : "",
209 nm, nm->code_begin(), nm->code_end());
210 }
212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
213 StringLogMessage lm;
214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
215 if (retry_message != NULL) {
216 lm.append(" (%s)", retry_message);
217 }
218 lm.print("\n");
219 log(thread, "%s", (const char*)lm);
220 }
221 };
223 static CompilationLog* _compilation_log = NULL;
225 void compileBroker_init() {
226 if (LogEvents) {
227 _compilation_log = new CompilationLog();
228 }
229 }
231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
232 CompilerThread* thread = CompilerThread::current();
233 thread->set_task(task);
234 CompileLog* log = thread->log();
235 if (log != NULL) task->log_task_start(log);
236 }
238 CompileTaskWrapper::~CompileTaskWrapper() {
239 CompilerThread* thread = CompilerThread::current();
240 CompileTask* task = thread->task();
241 CompileLog* log = thread->log();
242 if (log != NULL) task->log_task_done(log);
243 thread->set_task(NULL);
244 task->set_code_handle(NULL);
245 thread->set_env(NULL);
246 if (task->is_blocking()) {
247 MutexLocker notifier(task->lock(), thread);
248 task->mark_complete();
249 // Notify the waiting thread that the compilation has completed.
250 task->lock()->notify_all();
251 } else {
252 task->mark_complete();
254 // By convention, the compiling thread is responsible for
255 // recycling a non-blocking CompileTask.
256 CompileBroker::free_task(task);
257 }
258 }
261 // ------------------------------------------------------------------
262 // CompileTask::initialize
263 void CompileTask::initialize(int compile_id,
264 methodHandle method,
265 int osr_bci,
266 int comp_level,
267 methodHandle hot_method,
268 int hot_count,
269 const char* comment,
270 bool is_blocking) {
271 assert(!_lock->is_locked(), "bad locking");
273 _compile_id = compile_id;
274 _method = method();
275 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
276 _osr_bci = osr_bci;
277 _is_blocking = is_blocking;
278 _comp_level = comp_level;
279 _num_inlined_bytecodes = 0;
281 _is_complete = false;
282 _is_success = false;
283 _code_handle = NULL;
285 _hot_method = NULL;
286 _hot_method_holder = NULL;
287 _hot_count = hot_count;
288 _time_queued = 0; // tidy
289 _comment = comment;
291 if (LogCompilation) {
292 _time_queued = os::elapsed_counter();
293 if (hot_method.not_null()) {
294 if (hot_method == method) {
295 _hot_method = _method;
296 } else {
297 _hot_method = hot_method();
298 // only add loader or mirror if different from _method_holder
299 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
300 }
301 }
302 }
304 _next = NULL;
305 }
307 // ------------------------------------------------------------------
308 // CompileTask::code/set_code
309 nmethod* CompileTask::code() const {
310 if (_code_handle == NULL) return NULL;
311 return _code_handle->code();
312 }
313 void CompileTask::set_code(nmethod* nm) {
314 if (_code_handle == NULL && nm == NULL) return;
315 guarantee(_code_handle != NULL, "");
316 _code_handle->set_code(nm);
317 if (nm == NULL) _code_handle = NULL; // drop the handle also
318 }
320 // ------------------------------------------------------------------
321 // CompileTask::free
322 void CompileTask::free() {
323 set_code(NULL);
324 assert(!_lock->is_locked(), "Should not be locked when freed");
325 JNIHandles::destroy_global(_method_holder);
326 JNIHandles::destroy_global(_hot_method_holder);
327 }
330 void CompileTask::mark_on_stack() {
331 // Mark these methods as something redefine classes cannot remove.
332 _method->set_on_stack(true);
333 if (_hot_method != NULL) {
334 _hot_method->set_on_stack(true);
335 }
336 }
338 // ------------------------------------------------------------------
339 // CompileTask::print
340 void CompileTask::print() {
341 tty->print("<CompileTask compile_id=%d ", _compile_id);
342 tty->print("method=");
343 _method->print_name(tty);
344 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
345 _osr_bci, bool_to_str(_is_blocking),
346 bool_to_str(_is_complete), bool_to_str(_is_success));
347 }
350 // ------------------------------------------------------------------
351 // CompileTask::print_line_on_error
352 //
353 // This function is called by fatal error handler when the thread
354 // causing troubles is a compiler thread.
355 //
356 // Do not grab any lock, do not allocate memory.
357 //
358 // Otherwise it's the same as CompileTask::print_line()
359 //
360 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
361 // print compiler name
362 st->print("%s:", CompileBroker::compiler(comp_level())->name());
363 print_compilation(st);
364 }
366 // ------------------------------------------------------------------
367 // CompileTask::print_line
368 void CompileTask::print_line() {
369 ttyLocker ttyl; // keep the following output all in one block
370 // print compiler name if requested
371 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
372 print_compilation();
373 }
376 // ------------------------------------------------------------------
377 // CompileTask::print_compilation_impl
378 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
379 bool is_osr_method, int osr_bci, bool is_blocking,
380 const char* msg, bool short_form) {
381 if (!short_form) {
382 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
383 }
384 st->print("%4d ", compile_id); // print compilation number
386 // For unloaded methods the transition to zombie occurs after the
387 // method is cleared so it's impossible to report accurate
388 // information for that case.
389 bool is_synchronized = false;
390 bool has_exception_handler = false;
391 bool is_native = false;
392 if (method != NULL) {
393 is_synchronized = method->is_synchronized();
394 has_exception_handler = method->has_exception_handler();
395 is_native = method->is_native();
396 }
397 // method attributes
398 const char compile_type = is_osr_method ? '%' : ' ';
399 const char sync_char = is_synchronized ? 's' : ' ';
400 const char exception_char = has_exception_handler ? '!' : ' ';
401 const char blocking_char = is_blocking ? 'b' : ' ';
402 const char native_char = is_native ? 'n' : ' ';
404 // print method attributes
405 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
407 if (TieredCompilation) {
408 if (comp_level != -1) st->print("%d ", comp_level);
409 else st->print("- ");
410 }
411 st->print(" "); // more indent
413 if (method == NULL) {
414 st->print("(method)");
415 } else {
416 method->print_short_name(st);
417 if (is_osr_method) {
418 st->print(" @ %d", osr_bci);
419 }
420 if (method->is_native())
421 st->print(" (native)");
422 else
423 st->print(" (%d bytes)", method->code_size());
424 }
426 if (msg != NULL) {
427 st->print(" %s", msg);
428 }
429 if (!short_form) {
430 st->cr();
431 }
432 }
434 // ------------------------------------------------------------------
435 // CompileTask::print_inlining
436 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
437 // 1234567
438 st->print(" "); // print timestamp
439 // 1234
440 st->print(" "); // print compilation number
442 // method attributes
443 if (method->is_loaded()) {
444 const char sync_char = method->is_synchronized() ? 's' : ' ';
445 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
446 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
448 // print method attributes
449 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
450 } else {
451 // %s!bn
452 st->print(" "); // print method attributes
453 }
455 if (TieredCompilation) {
456 st->print(" ");
457 }
458 st->print(" "); // more indent
459 st->print(" "); // initial inlining indent
461 for (int i = 0; i < inline_level; i++) st->print(" ");
463 st->print("@ %d ", bci); // print bci
464 method->print_short_name(st);
465 if (method->is_loaded())
466 st->print(" (%d bytes)", method->code_size());
467 else
468 st->print(" (not loaded)");
470 if (msg != NULL) {
471 st->print(" %s", msg);
472 }
473 st->cr();
474 }
476 // ------------------------------------------------------------------
477 // CompileTask::print_inline_indent
478 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
479 // 1234567
480 st->print(" "); // print timestamp
481 // 1234
482 st->print(" "); // print compilation number
483 // %s!bn
484 st->print(" "); // print method attributes
485 if (TieredCompilation) {
486 st->print(" ");
487 }
488 st->print(" "); // more indent
489 st->print(" "); // initial inlining indent
490 for (int i = 0; i < inline_level; i++) st->print(" ");
491 }
493 // ------------------------------------------------------------------
494 // CompileTask::print_compilation
495 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
496 bool is_osr_method = osr_bci() != InvocationEntryBci;
497 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
498 }
500 // ------------------------------------------------------------------
501 // CompileTask::log_task
502 void CompileTask::log_task(xmlStream* log) {
503 Thread* thread = Thread::current();
504 methodHandle method(thread, this->method());
505 ResourceMark rm(thread);
507 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
508 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id);
509 if (_osr_bci != CompileBroker::standard_entry_bci) {
510 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
511 } // else compile_kind='c2c'
512 if (!method.is_null()) log->method(method);
513 if (_osr_bci != CompileBroker::standard_entry_bci) {
514 log->print(" osr_bci='%d'", _osr_bci);
515 }
516 if (_comp_level != CompLevel_highest_tier) {
517 log->print(" level='%d'", _comp_level);
518 }
519 if (_is_blocking) {
520 log->print(" blocking='1'");
521 }
522 log->stamp();
523 }
526 // ------------------------------------------------------------------
527 // CompileTask::log_task_queued
528 void CompileTask::log_task_queued() {
529 Thread* thread = Thread::current();
530 ttyLocker ttyl;
531 ResourceMark rm(thread);
533 xtty->begin_elem("task_queued");
534 log_task(xtty);
535 if (_comment != NULL) {
536 xtty->print(" comment='%s'", _comment);
537 }
538 if (_hot_method != NULL) {
539 methodHandle hot(thread, _hot_method);
540 methodHandle method(thread, _method);
541 if (hot() != method()) {
542 xtty->method(hot);
543 }
544 }
545 if (_hot_count != 0) {
546 xtty->print(" hot_count='%d'", _hot_count);
547 }
548 xtty->end_elem();
549 }
552 // ------------------------------------------------------------------
553 // CompileTask::log_task_start
554 void CompileTask::log_task_start(CompileLog* log) {
555 log->begin_head("task");
556 log_task(log);
557 log->end_head();
558 }
561 // ------------------------------------------------------------------
562 // CompileTask::log_task_done
563 void CompileTask::log_task_done(CompileLog* log) {
564 Thread* thread = Thread::current();
565 methodHandle method(thread, this->method());
566 ResourceMark rm(thread);
568 // <task_done ... stamp='1.234'> </task>
569 nmethod* nm = code();
570 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
571 _is_success, nm == NULL ? 0 : nm->content_size(),
572 method->invocation_count());
573 int bec = method->backedge_count();
574 if (bec != 0) log->print(" backedge_count='%d'", bec);
575 // Note: "_is_complete" is about to be set, but is not.
576 if (_num_inlined_bytecodes != 0) {
577 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
578 }
579 log->stamp();
580 log->end_elem();
581 log->tail("task");
582 log->clear_identities(); // next task will have different CI
583 if (log->unflushed_count() > 2000) {
584 log->flush();
585 }
586 log->mark_file_end();
587 }
591 // ------------------------------------------------------------------
592 // CompileQueue::add
593 //
594 // Add a CompileTask to a CompileQueue
595 void CompileQueue::add(CompileTask* task) {
596 assert(lock()->owned_by_self(), "must own lock");
598 task->set_next(NULL);
599 task->set_prev(NULL);
601 if (_last == NULL) {
602 // The compile queue is empty.
603 assert(_first == NULL, "queue is empty");
604 _first = task;
605 _last = task;
606 } else {
607 // Append the task to the queue.
608 assert(_last->next() == NULL, "not last");
609 _last->set_next(task);
610 task->set_prev(_last);
611 _last = task;
612 }
613 ++_size;
615 // Mark the method as being in the compile queue.
616 task->method()->set_queued_for_compilation();
618 if (CIPrintCompileQueue) {
619 print();
620 }
622 if (LogCompilation && xtty != NULL) {
623 task->log_task_queued();
624 }
626 // Notify CompilerThreads that a task is available.
627 lock()->notify_all();
628 }
630 // ------------------------------------------------------------------
631 // CompileQueue::get
632 //
633 // Get the next CompileTask from a CompileQueue
634 CompileTask* CompileQueue::get() {
635 NMethodSweeper::possibly_sweep();
637 MutexLocker locker(lock());
638 // Wait for an available CompileTask.
639 while (_first == NULL) {
640 // There is no work to be done right now. Wait.
641 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
642 // During the emergency sweeping periods, wake up and sweep occasionally
643 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
644 if (timedout) {
645 MutexUnlocker ul(lock());
646 // When otherwise not busy, run nmethod sweeping
647 NMethodSweeper::possibly_sweep();
648 }
649 } else {
650 // During normal operation no need to wake up on timer
651 lock()->wait();
652 }
653 }
654 CompileTask* task = CompilationPolicy::policy()->select_task(this);
655 remove(task);
656 return task;
657 }
659 void CompileQueue::remove(CompileTask* task)
660 {
661 assert(lock()->owned_by_self(), "must own lock");
662 if (task->prev() != NULL) {
663 task->prev()->set_next(task->next());
664 } else {
665 // max is the first element
666 assert(task == _first, "Sanity");
667 _first = task->next();
668 }
670 if (task->next() != NULL) {
671 task->next()->set_prev(task->prev());
672 } else {
673 // max is the last element
674 assert(task == _last, "Sanity");
675 _last = task->prev();
676 }
677 --_size;
678 }
680 // methods in the compile queue need to be marked as used on the stack
681 // so that they don't get reclaimed by Redefine Classes
682 void CompileQueue::mark_on_stack() {
683 CompileTask* task = _first;
684 while (task != NULL) {
685 task->mark_on_stack();
686 task = task->next();
687 }
688 }
690 // ------------------------------------------------------------------
691 // CompileQueue::print
692 void CompileQueue::print() {
693 tty->print_cr("Contents of %s", name());
694 tty->print_cr("----------------------");
695 CompileTask* task = _first;
696 while (task != NULL) {
697 task->print_line();
698 task = task->next();
699 }
700 tty->print_cr("----------------------");
701 }
703 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
705 _current_method[0] = '\0';
706 _compile_type = CompileBroker::no_compile;
708 if (UsePerfData) {
709 ResourceMark rm;
711 // create the thread instance name space string - don't create an
712 // instance subspace if instance is -1 - keeps the adapterThread
713 // counters from having a ".0" namespace.
714 const char* thread_i = (instance == -1) ? thread_name :
715 PerfDataManager::name_space(thread_name, instance);
718 char* name = PerfDataManager::counter_name(thread_i, "method");
719 _perf_current_method =
720 PerfDataManager::create_string_variable(SUN_CI, name,
721 cmname_buffer_length,
722 _current_method, CHECK);
724 name = PerfDataManager::counter_name(thread_i, "type");
725 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
726 PerfData::U_None,
727 (jlong)_compile_type,
728 CHECK);
730 name = PerfDataManager::counter_name(thread_i, "time");
731 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
732 PerfData::U_Ticks, CHECK);
734 name = PerfDataManager::counter_name(thread_i, "compiles");
735 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
736 PerfData::U_Events, CHECK);
737 }
738 }
740 // ------------------------------------------------------------------
741 // CompileBroker::compilation_init
742 //
743 // Initialize the Compilation object
744 void CompileBroker::compilation_init() {
745 _last_method_compiled[0] = '\0';
747 #ifndef SHARK
748 // Set the interface to the current compiler(s).
749 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
750 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
751 #ifdef COMPILER1
752 if (c1_count > 0) {
753 _compilers[0] = new Compiler();
754 }
755 #endif // COMPILER1
757 #ifdef COMPILER2
758 if (c2_count > 0) {
759 _compilers[1] = new C2Compiler();
760 }
761 #endif // COMPILER2
763 #else // SHARK
764 int c1_count = 0;
765 int c2_count = 1;
767 _compilers[1] = new SharkCompiler();
768 #endif // SHARK
770 // Initialize the CompileTask free list
771 _task_free_list = NULL;
773 // Start the CompilerThreads
774 init_compiler_threads(c1_count, c2_count);
775 // totalTime performance counter is always created as it is required
776 // by the implementation of java.lang.management.CompilationMBean.
777 {
778 EXCEPTION_MARK;
779 _perf_total_compilation =
780 PerfDataManager::create_counter(JAVA_CI, "totalTime",
781 PerfData::U_Ticks, CHECK);
782 }
785 if (UsePerfData) {
787 EXCEPTION_MARK;
789 // create the jvmstat performance counters
790 _perf_osr_compilation =
791 PerfDataManager::create_counter(SUN_CI, "osrTime",
792 PerfData::U_Ticks, CHECK);
794 _perf_standard_compilation =
795 PerfDataManager::create_counter(SUN_CI, "standardTime",
796 PerfData::U_Ticks, CHECK);
798 _perf_total_bailout_count =
799 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
800 PerfData::U_Events, CHECK);
802 _perf_total_invalidated_count =
803 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
804 PerfData::U_Events, CHECK);
806 _perf_total_compile_count =
807 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
808 PerfData::U_Events, CHECK);
809 _perf_total_osr_compile_count =
810 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
811 PerfData::U_Events, CHECK);
813 _perf_total_standard_compile_count =
814 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
815 PerfData::U_Events, CHECK);
817 _perf_sum_osr_bytes_compiled =
818 PerfDataManager::create_counter(SUN_CI, "osrBytes",
819 PerfData::U_Bytes, CHECK);
821 _perf_sum_standard_bytes_compiled =
822 PerfDataManager::create_counter(SUN_CI, "standardBytes",
823 PerfData::U_Bytes, CHECK);
825 _perf_sum_nmethod_size =
826 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
827 PerfData::U_Bytes, CHECK);
829 _perf_sum_nmethod_code_size =
830 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
831 PerfData::U_Bytes, CHECK);
833 _perf_last_method =
834 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
835 CompilerCounters::cmname_buffer_length,
836 "", CHECK);
838 _perf_last_failed_method =
839 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
840 CompilerCounters::cmname_buffer_length,
841 "", CHECK);
843 _perf_last_invalidated_method =
844 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
845 CompilerCounters::cmname_buffer_length,
846 "", CHECK);
848 _perf_last_compile_type =
849 PerfDataManager::create_variable(SUN_CI, "lastType",
850 PerfData::U_None,
851 (jlong)CompileBroker::no_compile,
852 CHECK);
854 _perf_last_compile_size =
855 PerfDataManager::create_variable(SUN_CI, "lastSize",
856 PerfData::U_Bytes,
857 (jlong)CompileBroker::no_compile,
858 CHECK);
861 _perf_last_failed_type =
862 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
863 PerfData::U_None,
864 (jlong)CompileBroker::no_compile,
865 CHECK);
867 _perf_last_invalidated_type =
868 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
869 PerfData::U_None,
870 (jlong)CompileBroker::no_compile,
871 CHECK);
872 }
874 _initialized = true;
875 }
879 // ------------------------------------------------------------------
880 // CompileBroker::make_compiler_thread
881 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
882 CompilerThread* compiler_thread = NULL;
884 Klass* k =
885 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
886 true, CHECK_0);
887 instanceKlassHandle klass (THREAD, k);
888 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
889 Handle string = java_lang_String::create_from_str(name, CHECK_0);
891 // Initialize thread_oop to put it into the system threadGroup
892 Handle thread_group (THREAD, Universe::system_thread_group());
893 JavaValue result(T_VOID);
894 JavaCalls::call_special(&result, thread_oop,
895 klass,
896 vmSymbols::object_initializer_name(),
897 vmSymbols::threadgroup_string_void_signature(),
898 thread_group,
899 string,
900 CHECK_0);
902 {
903 MutexLocker mu(Threads_lock, THREAD);
904 compiler_thread = new CompilerThread(queue, counters);
905 // At this point the new CompilerThread data-races with this startup
906 // thread (which I believe is the primoridal thread and NOT the VM
907 // thread). This means Java bytecodes being executed at startup can
908 // queue compile jobs which will run at whatever default priority the
909 // newly created CompilerThread runs at.
912 // At this point it may be possible that no osthread was created for the
913 // JavaThread due to lack of memory. We would have to throw an exception
914 // in that case. However, since this must work and we do not allow
915 // exceptions anyway, check and abort if this fails.
917 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
918 vm_exit_during_initialization("java.lang.OutOfMemoryError",
919 "unable to create new native thread");
920 }
922 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
924 // Note that this only sets the JavaThread _priority field, which by
925 // definition is limited to Java priorities and not OS priorities.
926 // The os-priority is set in the CompilerThread startup code itself
928 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
930 // Note that we cannot call os::set_priority because it expects Java
931 // priorities and we are *explicitly* using OS priorities so that it's
932 // possible to set the compiler thread priority higher than any Java
933 // thread.
935 int native_prio = CompilerThreadPriority;
936 if (native_prio == -1) {
937 if (UseCriticalCompilerThreadPriority) {
938 native_prio = os::java_to_os_priority[CriticalPriority];
939 } else {
940 native_prio = os::java_to_os_priority[NearMaxPriority];
941 }
942 }
943 os::set_native_priority(compiler_thread, native_prio);
945 java_lang_Thread::set_daemon(thread_oop());
947 compiler_thread->set_threadObj(thread_oop());
948 Threads::add(compiler_thread);
949 Thread::start(compiler_thread);
950 }
952 // Let go of Threads_lock before yielding
953 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
955 return compiler_thread;
956 }
959 // ------------------------------------------------------------------
960 // CompileBroker::init_compiler_threads
961 //
962 // Initialize the compilation queue
963 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
964 EXCEPTION_MARK;
965 #if !defined(ZERO) && !defined(SHARK)
966 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
967 #endif // !ZERO && !SHARK
968 if (c2_compiler_count > 0) {
969 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
970 }
971 if (c1_compiler_count > 0) {
972 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
973 }
975 int compiler_count = c1_compiler_count + c2_compiler_count;
977 _method_threads =
978 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
980 char name_buffer[256];
981 for (int i = 0; i < c2_compiler_count; i++) {
982 // Create a name for our thread.
983 sprintf(name_buffer, "C2 CompilerThread%d", i);
984 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
985 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
986 _method_threads->append(new_thread);
987 }
989 for (int i = c2_compiler_count; i < compiler_count; i++) {
990 // Create a name for our thread.
991 sprintf(name_buffer, "C1 CompilerThread%d", i);
992 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
993 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
994 _method_threads->append(new_thread);
995 }
997 if (UsePerfData) {
998 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
999 compiler_count, CHECK);
1000 }
1001 }
1004 // Set the methods on the stack as on_stack so that redefine classes doesn't
1005 // reclaim them
1006 void CompileBroker::mark_on_stack() {
1007 if (_c2_method_queue != NULL) {
1008 _c2_method_queue->mark_on_stack();
1009 }
1010 if (_c1_method_queue != NULL) {
1011 _c1_method_queue->mark_on_stack();
1012 }
1013 }
1015 // ------------------------------------------------------------------
1016 // CompileBroker::is_idle
1017 bool CompileBroker::is_idle() {
1018 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
1019 return false;
1020 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
1021 return false;
1022 } else {
1023 int num_threads = _method_threads->length();
1024 for (int i=0; i<num_threads; i++) {
1025 if (_method_threads->at(i)->task() != NULL) {
1026 return false;
1027 }
1028 }
1030 // No pending or active compilations.
1031 return true;
1032 }
1033 }
1036 // ------------------------------------------------------------------
1037 // CompileBroker::compile_method
1038 //
1039 // Request compilation of a method.
1040 void CompileBroker::compile_method_base(methodHandle method,
1041 int osr_bci,
1042 int comp_level,
1043 methodHandle hot_method,
1044 int hot_count,
1045 const char* comment,
1046 Thread* thread) {
1047 // do nothing if compiler thread(s) is not available
1048 if (!_initialized ) {
1049 return;
1050 }
1052 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1053 assert(method->method_holder()->oop_is_instance(),
1054 "sanity check");
1055 assert(!method->method_holder()->is_not_initialized(),
1056 "method holder must be initialized");
1057 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1059 if (CIPrintRequests) {
1060 tty->print("request: ");
1061 method->print_short_name(tty);
1062 if (osr_bci != InvocationEntryBci) {
1063 tty->print(" osr_bci: %d", osr_bci);
1064 }
1065 tty->print(" comment: %s count: %d", comment, hot_count);
1066 if (!hot_method.is_null()) {
1067 tty->print(" hot: ");
1068 if (hot_method() != method()) {
1069 hot_method->print_short_name(tty);
1070 } else {
1071 tty->print("yes");
1072 }
1073 }
1074 tty->cr();
1075 }
1077 // A request has been made for compilation. Before we do any
1078 // real work, check to see if the method has been compiled
1079 // in the meantime with a definitive result.
1080 if (compilation_is_complete(method, osr_bci, comp_level)) {
1081 return;
1082 }
1084 #ifndef PRODUCT
1085 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1086 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1087 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1088 return;
1089 }
1090 }
1091 #endif
1093 // If this method is already in the compile queue, then
1094 // we do not block the current thread.
1095 if (compilation_is_in_queue(method, osr_bci)) {
1096 // We may want to decay our counter a bit here to prevent
1097 // multiple denied requests for compilation. This is an
1098 // open compilation policy issue. Note: The other possibility,
1099 // in the case that this is a blocking compile request, is to have
1100 // all subsequent blocking requesters wait for completion of
1101 // ongoing compiles. Note that in this case we'll need a protocol
1102 // for freeing the associated compile tasks. [Or we could have
1103 // a single static monitor on which all these waiters sleep.]
1104 return;
1105 }
1107 // If the requesting thread is holding the pending list lock
1108 // then we just return. We can't risk blocking while holding
1109 // the pending list lock or a 3-way deadlock may occur
1110 // between the reference handler thread, a GC (instigated
1111 // by a compiler thread), and compiled method registration.
1112 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1113 return;
1114 }
1116 // Outputs from the following MutexLocker block:
1117 CompileTask* task = NULL;
1118 bool blocking = false;
1119 CompileQueue* queue = compile_queue(comp_level);
1121 // Acquire our lock.
1122 {
1123 MutexLocker locker(queue->lock(), thread);
1125 // Make sure the method has not slipped into the queues since
1126 // last we checked; note that those checks were "fast bail-outs".
1127 // Here we need to be more careful, see 14012000 below.
1128 if (compilation_is_in_queue(method, osr_bci)) {
1129 return;
1130 }
1132 // We need to check again to see if the compilation has
1133 // completed. A previous compilation may have registered
1134 // some result.
1135 if (compilation_is_complete(method, osr_bci, comp_level)) {
1136 return;
1137 }
1139 // We now know that this compilation is not pending, complete,
1140 // or prohibited. Assign a compile_id to this compilation
1141 // and check to see if it is in our [Start..Stop) range.
1142 uint compile_id = assign_compile_id(method, osr_bci);
1143 if (compile_id == 0) {
1144 // The compilation falls outside the allowed range.
1145 return;
1146 }
1148 // Should this thread wait for completion of the compile?
1149 blocking = is_compile_blocking(method, osr_bci);
1151 // We will enter the compilation in the queue.
1152 // 14012000: Note that this sets the queued_for_compile bits in
1153 // the target method. We can now reason that a method cannot be
1154 // queued for compilation more than once, as follows:
1155 // Before a thread queues a task for compilation, it first acquires
1156 // the compile queue lock, then checks if the method's queued bits
1157 // are set or it has already been compiled. Thus there can not be two
1158 // instances of a compilation task for the same method on the
1159 // compilation queue. Consider now the case where the compilation
1160 // thread has already removed a task for that method from the queue
1161 // and is in the midst of compiling it. In this case, the
1162 // queued_for_compile bits must be set in the method (and these
1163 // will be visible to the current thread, since the bits were set
1164 // under protection of the compile queue lock, which we hold now.
1165 // When the compilation completes, the compiler thread first sets
1166 // the compilation result and then clears the queued_for_compile
1167 // bits. Neither of these actions are protected by a barrier (or done
1168 // under the protection of a lock), so the only guarantee we have
1169 // (on machines with TSO (Total Store Order)) is that these values
1170 // will update in that order. As a result, the only combinations of
1171 // these bits that the current thread will see are, in temporal order:
1172 // <RESULT, QUEUE> :
1173 // <0, 1> : in compile queue, but not yet compiled
1174 // <1, 1> : compiled but queue bit not cleared
1175 // <1, 0> : compiled and queue bit cleared
1176 // Because we first check the queue bits then check the result bits,
1177 // we are assured that we cannot introduce a duplicate task.
1178 // Note that if we did the tests in the reverse order (i.e. check
1179 // result then check queued bit), we could get the result bit before
1180 // the compilation completed, and the queue bit after the compilation
1181 // completed, and end up introducing a "duplicate" (redundant) task.
1182 // In that case, the compiler thread should first check if a method
1183 // has already been compiled before trying to compile it.
1184 // NOTE: in the event that there are multiple compiler threads and
1185 // there is de-optimization/recompilation, things will get hairy,
1186 // and in that case it's best to protect both the testing (here) of
1187 // these bits, and their updating (here and elsewhere) under a
1188 // common lock.
1189 task = create_compile_task(queue,
1190 compile_id, method,
1191 osr_bci, comp_level,
1192 hot_method, hot_count, comment,
1193 blocking);
1194 }
1196 if (blocking) {
1197 wait_for_completion(task);
1198 }
1199 }
1202 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1203 int comp_level,
1204 methodHandle hot_method, int hot_count,
1205 const char* comment, Thread* THREAD) {
1206 // make sure arguments make sense
1207 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1208 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1209 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1210 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1212 if (!TieredCompilation) {
1213 comp_level = CompLevel_highest_tier;
1214 }
1216 // return quickly if possible
1218 // lock, make sure that the compilation
1219 // isn't prohibited in a straightforward way.
1221 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
1222 return NULL;
1223 }
1225 if (osr_bci == InvocationEntryBci) {
1226 // standard compilation
1227 nmethod* method_code = method->code();
1228 if (method_code != NULL) {
1229 if (compilation_is_complete(method, osr_bci, comp_level)) {
1230 return method_code;
1231 }
1232 }
1233 if (method->is_not_compilable(comp_level)) return NULL;
1235 if (UseCodeCacheFlushing) {
1236 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1237 if (saved != NULL) {
1238 method->set_code(method, saved);
1239 return saved;
1240 }
1241 }
1243 } else {
1244 // osr compilation
1245 #ifndef TIERED
1246 // seems like an assert of dubious value
1247 assert(comp_level == CompLevel_highest_tier,
1248 "all OSR compiles are assumed to be at a single compilation lavel");
1249 #endif // TIERED
1250 // We accept a higher level osr method
1251 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1252 if (nm != NULL) return nm;
1253 if (method->is_not_osr_compilable(comp_level)) return NULL;
1254 }
1256 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1257 // some prerequisites that are compiler specific
1258 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) {
1259 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1260 // Resolve all classes seen in the signature of the method
1261 // we are compiling.
1262 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1263 }
1265 // If the method is native, do the lookup in the thread requesting
1266 // the compilation. Native lookups can load code, which is not
1267 // permitted during compilation.
1268 //
1269 // Note: A native method implies non-osr compilation which is
1270 // checked with an assertion at the entry of this method.
1271 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1272 bool in_base_library;
1273 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1274 if (HAS_PENDING_EXCEPTION) {
1275 // In case of an exception looking up the method, we just forget
1276 // about it. The interpreter will kick-in and throw the exception.
1277 method->set_not_compilable(); // implies is_not_osr_compilable()
1278 CLEAR_PENDING_EXCEPTION;
1279 return NULL;
1280 }
1281 assert(method->has_native_function(), "must have native code by now");
1282 }
1284 // RedefineClasses() has replaced this method; just return
1285 if (method->is_old()) {
1286 return NULL;
1287 }
1289 // JVMTI -- post_compile_event requires jmethod_id() that may require
1290 // a lock the compiling thread can not acquire. Prefetch it here.
1291 if (JvmtiExport::should_post_compiled_method_load()) {
1292 method->jmethod_id();
1293 }
1295 // If the compiler is shut off due to code cache flushing or otherwise,
1296 // fail out now so blocking compiles dont hang the java thread
1297 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1298 CompilationPolicy::policy()->delay_compilation(method());
1299 return NULL;
1300 }
1302 // do the compilation
1303 if (method->is_native()) {
1304 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1305 // Acquire our lock.
1306 int compile_id;
1307 {
1308 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1309 compile_id = assign_compile_id(method, standard_entry_bci);
1310 }
1311 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1312 } else {
1313 return NULL;
1314 }
1315 } else {
1316 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1317 }
1319 // return requested nmethod
1320 // We accept a higher level osr method
1321 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1322 }
1325 // ------------------------------------------------------------------
1326 // CompileBroker::compilation_is_complete
1327 //
1328 // See if compilation of this method is already complete.
1329 bool CompileBroker::compilation_is_complete(methodHandle method,
1330 int osr_bci,
1331 int comp_level) {
1332 bool is_osr = (osr_bci != standard_entry_bci);
1333 if (is_osr) {
1334 if (method->is_not_osr_compilable(comp_level)) {
1335 return true;
1336 } else {
1337 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1338 return (result != NULL);
1339 }
1340 } else {
1341 if (method->is_not_compilable(comp_level)) {
1342 return true;
1343 } else {
1344 nmethod* result = method->code();
1345 if (result == NULL) return false;
1346 return comp_level == result->comp_level();
1347 }
1348 }
1349 }
1352 // ------------------------------------------------------------------
1353 // CompileBroker::compilation_is_in_queue
1354 //
1355 // See if this compilation is already requested.
1356 //
1357 // Implementation note: there is only a single "is in queue" bit
1358 // for each method. This means that the check below is overly
1359 // conservative in the sense that an osr compilation in the queue
1360 // will block a normal compilation from entering the queue (and vice
1361 // versa). This can be remedied by a full queue search to disambiguate
1362 // cases. If it is deemed profitible, this may be done.
1363 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1364 int osr_bci) {
1365 return method->queued_for_compilation();
1366 }
1368 // ------------------------------------------------------------------
1369 // CompileBroker::compilation_is_prohibited
1370 //
1371 // See if this compilation is not allowed.
1372 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1373 bool is_native = method->is_native();
1374 // Some compilers may not support the compilation of natives.
1375 if (is_native &&
1376 (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1377 method->set_not_compilable_quietly(comp_level);
1378 return true;
1379 }
1381 bool is_osr = (osr_bci != standard_entry_bci);
1382 // Some compilers may not support on stack replacement.
1383 if (is_osr &&
1384 (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1385 method->set_not_osr_compilable(comp_level);
1386 return true;
1387 }
1389 // The method may be explicitly excluded by the user.
1390 bool quietly;
1391 if (CompilerOracle::should_exclude(method, quietly)) {
1392 if (!quietly) {
1393 // This does not happen quietly...
1394 ResourceMark rm;
1395 tty->print("### Excluding %s:%s",
1396 method->is_native() ? "generation of native wrapper" : "compile",
1397 (method->is_static() ? " static" : ""));
1398 method->print_short_name(tty);
1399 tty->cr();
1400 }
1401 method->set_not_compilable_quietly();
1402 }
1404 return false;
1405 }
1408 // ------------------------------------------------------------------
1409 // CompileBroker::assign_compile_id
1410 //
1411 // Assign a serialized id number to this compilation request. If the
1412 // number falls out of the allowed range, return a 0. OSR
1413 // compilations may be numbered separately from regular compilations
1414 // if certain debugging flags are used.
1415 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1416 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1417 "must hold the compilation queue lock");
1418 bool is_osr = (osr_bci != standard_entry_bci);
1419 uint id;
1420 if (CICountOSR && is_osr) {
1421 id = ++_osr_compilation_id;
1422 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1423 return id;
1424 }
1425 } else {
1426 id = ++_compilation_id;
1427 if ((uint)CIStart <= id && id < (uint)CIStop) {
1428 return id;
1429 }
1430 }
1432 // Method was not in the appropriate compilation range.
1433 method->set_not_compilable_quietly();
1434 return 0;
1435 }
1438 // ------------------------------------------------------------------
1439 // CompileBroker::is_compile_blocking
1440 //
1441 // Should the current thread be blocked until this compilation request
1442 // has been fulfilled?
1443 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1444 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1445 return !BackgroundCompilation;
1446 }
1449 // ------------------------------------------------------------------
1450 // CompileBroker::preload_classes
1451 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1452 // Move this code over from c1_Compiler.cpp
1453 ShouldNotReachHere();
1454 }
1457 // ------------------------------------------------------------------
1458 // CompileBroker::create_compile_task
1459 //
1460 // Create a CompileTask object representing the current request for
1461 // compilation. Add this task to the queue.
1462 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1463 int compile_id,
1464 methodHandle method,
1465 int osr_bci,
1466 int comp_level,
1467 methodHandle hot_method,
1468 int hot_count,
1469 const char* comment,
1470 bool blocking) {
1471 CompileTask* new_task = allocate_task();
1472 new_task->initialize(compile_id, method, osr_bci, comp_level,
1473 hot_method, hot_count, comment,
1474 blocking);
1475 queue->add(new_task);
1476 return new_task;
1477 }
1480 // ------------------------------------------------------------------
1481 // CompileBroker::allocate_task
1482 //
1483 // Allocate a CompileTask, from the free list if possible.
1484 CompileTask* CompileBroker::allocate_task() {
1485 MutexLocker locker(CompileTaskAlloc_lock);
1486 CompileTask* task = NULL;
1487 if (_task_free_list != NULL) {
1488 task = _task_free_list;
1489 _task_free_list = task->next();
1490 task->set_next(NULL);
1491 } else {
1492 task = new CompileTask();
1493 task->set_next(NULL);
1494 }
1495 return task;
1496 }
1499 // ------------------------------------------------------------------
1500 // CompileBroker::free_task
1501 //
1502 // Add a task to the free list.
1503 void CompileBroker::free_task(CompileTask* task) {
1504 MutexLocker locker(CompileTaskAlloc_lock);
1505 task->free();
1506 task->set_next(_task_free_list);
1507 _task_free_list = task;
1508 }
1511 // ------------------------------------------------------------------
1512 // CompileBroker::wait_for_completion
1513 //
1514 // Wait for the given method CompileTask to complete.
1515 void CompileBroker::wait_for_completion(CompileTask* task) {
1516 if (CIPrintCompileQueue) {
1517 tty->print_cr("BLOCKING FOR COMPILE");
1518 }
1520 assert(task->is_blocking(), "can only wait on blocking task");
1522 JavaThread *thread = JavaThread::current();
1523 thread->set_blocked_on_compilation(true);
1525 methodHandle method(thread, task->method());
1526 {
1527 MutexLocker waiter(task->lock(), thread);
1529 while (!task->is_complete())
1530 task->lock()->wait();
1531 }
1532 // It is harmless to check this status without the lock, because
1533 // completion is a stable property (until the task object is recycled).
1534 assert(task->is_complete(), "Compilation should have completed");
1535 assert(task->code_handle() == NULL, "must be reset");
1537 thread->set_blocked_on_compilation(false);
1539 // By convention, the waiter is responsible for recycling a
1540 // blocking CompileTask. Since there is only one waiter ever
1541 // waiting on a CompileTask, we know that no one else will
1542 // be using this CompileTask; we can free it.
1543 free_task(task);
1544 }
1546 // ------------------------------------------------------------------
1547 // CompileBroker::compiler_thread_loop
1548 //
1549 // The main loop run by a CompilerThread.
1550 void CompileBroker::compiler_thread_loop() {
1551 CompilerThread* thread = CompilerThread::current();
1552 CompileQueue* queue = thread->queue();
1554 // For the thread that initializes the ciObjectFactory
1555 // this resource mark holds all the shared objects
1556 ResourceMark rm;
1558 // First thread to get here will initialize the compiler interface
1560 if (!ciObjectFactory::is_initialized()) {
1561 ASSERT_IN_VM;
1562 MutexLocker only_one (CompileThread_lock, thread);
1563 if (!ciObjectFactory::is_initialized()) {
1564 ciObjectFactory::initialize();
1565 }
1566 }
1568 // Open a log.
1569 if (LogCompilation) {
1570 init_compiler_thread_log();
1571 }
1572 CompileLog* log = thread->log();
1573 if (log != NULL) {
1574 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1575 thread->name(),
1576 os::current_thread_id(),
1577 os::current_process_id());
1578 log->stamp();
1579 log->end_elem();
1580 }
1582 while (true) {
1583 {
1584 // We need this HandleMark to avoid leaking VM handles.
1585 HandleMark hm(thread);
1587 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) {
1588 // the code cache is really full
1589 handle_full_code_cache();
1590 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1591 // Attempt to start cleaning the code cache while there is still a little headroom
1592 NMethodSweeper::handle_full_code_cache(false);
1593 }
1595 CompileTask* task = queue->get();
1597 // Give compiler threads an extra quanta. They tend to be bursty and
1598 // this helps the compiler to finish up the job.
1599 if( CompilerThreadHintNoPreempt )
1600 os::hint_no_preempt();
1602 // trace per thread time and compile statistics
1603 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1604 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1606 // Assign the task to the current thread. Mark this compilation
1607 // thread as active for the profiler.
1608 CompileTaskWrapper ctw(task);
1609 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1610 task->set_code_handle(&result_handle);
1611 methodHandle method(thread, task->method());
1613 // Never compile a method if breakpoints are present in it
1614 if (method()->number_of_breakpoints() == 0) {
1615 // Compile the method.
1616 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1617 #ifdef COMPILER1
1618 // Allow repeating compilations for the purpose of benchmarking
1619 // compile speed. This is not useful for customers.
1620 if (CompilationRepeat != 0) {
1621 int compile_count = CompilationRepeat;
1622 while (compile_count > 0) {
1623 invoke_compiler_on_method(task);
1624 nmethod* nm = method->code();
1625 if (nm != NULL) {
1626 nm->make_zombie();
1627 method->clear_code();
1628 }
1629 compile_count--;
1630 }
1631 }
1632 #endif /* COMPILER1 */
1633 invoke_compiler_on_method(task);
1634 } else {
1635 // After compilation is disabled, remove remaining methods from queue
1636 method->clear_queued_for_compilation();
1637 }
1638 }
1639 }
1640 }
1641 }
1644 // ------------------------------------------------------------------
1645 // CompileBroker::init_compiler_thread_log
1646 //
1647 // Set up state required by +LogCompilation.
1648 void CompileBroker::init_compiler_thread_log() {
1649 CompilerThread* thread = CompilerThread::current();
1650 char fileBuf[4*K];
1651 FILE* fp = NULL;
1652 char* file = NULL;
1653 intx thread_id = os::current_thread_id();
1654 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1655 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1656 if (dir == NULL) {
1657 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1658 thread_id, os::current_process_id());
1659 } else {
1660 jio_snprintf(fileBuf, sizeof(fileBuf),
1661 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1662 os::file_separator(), thread_id, os::current_process_id());
1663 }
1664 fp = fopen(fileBuf, "at");
1665 if (fp != NULL) {
1666 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler);
1667 strcpy(file, fileBuf);
1668 break;
1669 }
1670 }
1671 if (fp == NULL) {
1672 warning("Cannot open log file: %s", fileBuf);
1673 } else {
1674 if (LogCompilation && Verbose)
1675 tty->print_cr("Opening compilation log %s", file);
1676 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id);
1677 thread->init_log(log);
1679 if (xtty != NULL) {
1680 ttyLocker ttyl;
1682 // Record any per thread log files
1683 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1684 }
1685 }
1686 }
1688 // ------------------------------------------------------------------
1689 // CompileBroker::set_should_block
1690 //
1691 // Set _should_block.
1692 // Call this from the VM, with Threads_lock held and a safepoint requested.
1693 void CompileBroker::set_should_block() {
1694 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1695 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1696 #ifndef PRODUCT
1697 if (PrintCompilation && (Verbose || WizardMode))
1698 tty->print_cr("notifying compiler thread pool to block");
1699 #endif
1700 _should_block = true;
1701 }
1703 // ------------------------------------------------------------------
1704 // CompileBroker::maybe_block
1705 //
1706 // Call this from the compiler at convenient points, to poll for _should_block.
1707 void CompileBroker::maybe_block() {
1708 if (_should_block) {
1709 #ifndef PRODUCT
1710 if (PrintCompilation && (Verbose || WizardMode))
1711 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1712 #endif
1713 ThreadInVMfromNative tivfn(JavaThread::current());
1714 }
1715 }
1717 // ------------------------------------------------------------------
1718 // CompileBroker::invoke_compiler_on_method
1719 //
1720 // Compile a method.
1721 //
1722 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1723 if (PrintCompilation) {
1724 ResourceMark rm;
1725 task->print_line();
1726 }
1727 elapsedTimer time;
1729 CompilerThread* thread = CompilerThread::current();
1730 ResourceMark rm(thread);
1732 if (LogEvents) {
1733 _compilation_log->log_compile(thread, task);
1734 }
1736 // Common flags.
1737 uint compile_id = task->compile_id();
1738 int osr_bci = task->osr_bci();
1739 bool is_osr = (osr_bci != standard_entry_bci);
1740 bool should_log = (thread->log() != NULL);
1741 bool should_break = false;
1742 {
1743 // create the handle inside it's own block so it can't
1744 // accidentally be referenced once the thread transitions to
1745 // native. The NoHandleMark before the transition should catch
1746 // any cases where this occurs in the future.
1747 methodHandle method(thread, task->method());
1748 should_break = check_break_at(method, compile_id, is_osr);
1749 if (should_log && !CompilerOracle::should_log(method)) {
1750 should_log = false;
1751 }
1752 assert(!method->is_native(), "no longer compile natives");
1754 // Save information about this method in case of failure.
1755 set_last_compile(thread, method, is_osr, task->comp_level());
1757 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1758 }
1760 // Allocate a new set of JNI handles.
1761 push_jni_handle_block();
1762 Method* target_handle = task->method();
1763 int compilable = ciEnv::MethodCompilable;
1764 {
1765 int system_dictionary_modification_counter;
1766 {
1767 MutexLocker locker(Compile_lock, thread);
1768 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1769 }
1771 NoHandleMark nhm;
1772 ThreadToNativeFromVM ttn(thread);
1774 ciEnv ci_env(task, system_dictionary_modification_counter);
1775 if (should_break) {
1776 ci_env.set_break_at_compile(true);
1777 }
1778 if (should_log) {
1779 ci_env.set_log(thread->log());
1780 }
1781 assert(thread->env() == &ci_env, "set by ci_env");
1782 // The thread-env() field is cleared in ~CompileTaskWrapper.
1784 // Cache Jvmti state
1785 ci_env.cache_jvmti_state();
1787 // Cache DTrace flags
1788 ci_env.cache_dtrace_flags();
1790 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1792 TraceTime t1("compilation", &time);
1794 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1796 if (!ci_env.failing() && task->code() == NULL) {
1797 //assert(false, "compiler should always document failure");
1798 // The compiler elected, without comment, not to register a result.
1799 // Do not attempt further compilations of this method.
1800 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1801 }
1803 // Copy this bit to the enclosing block:
1804 compilable = ci_env.compilable();
1806 if (ci_env.failing()) {
1807 const char* retry_message = ci_env.retry_message();
1808 if (_compilation_log != NULL) {
1809 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1810 }
1811 if (PrintCompilation) {
1812 FormatBufferResource msg = retry_message != NULL ?
1813 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1814 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1815 task->print_compilation(tty, msg);
1816 }
1817 } else {
1818 task->mark_success();
1819 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1820 if (_compilation_log != NULL) {
1821 nmethod* code = task->code();
1822 if (code != NULL) {
1823 _compilation_log->log_nmethod(thread, code);
1824 }
1825 }
1826 }
1827 }
1828 pop_jni_handle_block();
1830 methodHandle method(thread, task->method());
1832 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1834 collect_statistics(thread, time, task);
1836 if (PrintCompilation && PrintCompilation2) {
1837 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1838 tty->print("%4d ", compile_id); // print compilation number
1839 tty->print("%s ", (is_osr ? "%" : " "));
1840 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size();
1841 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes());
1842 }
1844 // Disable compilation, if required.
1845 switch (compilable) {
1846 case ciEnv::MethodCompilable_never:
1847 if (is_osr)
1848 method->set_not_osr_compilable_quietly();
1849 else
1850 method->set_not_compilable_quietly();
1851 break;
1852 case ciEnv::MethodCompilable_not_at_tier:
1853 if (is_osr)
1854 method->set_not_osr_compilable_quietly(task->comp_level());
1855 else
1856 method->set_not_compilable_quietly(task->comp_level());
1857 break;
1858 }
1860 // Note that the queued_for_compilation bits are cleared without
1861 // protection of a mutex. [They were set by the requester thread,
1862 // when adding the task to the complie queue -- at which time the
1863 // compile queue lock was held. Subsequently, we acquired the compile
1864 // queue lock to get this task off the compile queue; thus (to belabour
1865 // the point somewhat) our clearing of the bits must be occurring
1866 // only after the setting of the bits. See also 14012000 above.
1867 method->clear_queued_for_compilation();
1869 #ifdef ASSERT
1870 if (CollectedHeap::fired_fake_oom()) {
1871 // The current compile received a fake OOM during compilation so
1872 // go ahead and exit the VM since the test apparently succeeded
1873 tty->print_cr("*** Shutting down VM after successful fake OOM");
1874 vm_exit(0);
1875 }
1876 #endif
1877 }
1879 // ------------------------------------------------------------------
1880 // CompileBroker::handle_full_code_cache
1881 //
1882 // The CodeCache is full. Print out warning and disable compilation or
1883 // try code cache cleaning so compilation can continue later.
1884 void CompileBroker::handle_full_code_cache() {
1885 UseInterpreter = true;
1886 if (UseCompiler || AlwaysCompileLoopMethods ) {
1887 if (xtty != NULL) {
1888 stringStream s;
1889 // Dump code cache state into a buffer before locking the tty,
1890 // because log_state() will use locks causing lock conflicts.
1891 CodeCache::log_state(&s);
1892 // Lock to prevent tearing
1893 ttyLocker ttyl;
1894 xtty->begin_elem("code_cache_full");
1895 xtty->print(s.as_string());
1896 xtty->stamp();
1897 xtty->end_elem();
1898 }
1899 warning("CodeCache is full. Compiler has been disabled.");
1900 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1901 CodeCache::print_bounds(tty);
1902 #ifndef PRODUCT
1903 if (CompileTheWorld || ExitOnFullCodeCache) {
1904 before_exit(JavaThread::current());
1905 exit_globals(); // will delete tty
1906 vm_direct_exit(CompileTheWorld ? 0 : 1);
1907 }
1908 #endif
1909 if (UseCodeCacheFlushing) {
1910 NMethodSweeper::handle_full_code_cache(true);
1911 } else {
1912 UseCompiler = false;
1913 AlwaysCompileLoopMethods = false;
1914 }
1915 }
1916 }
1918 // ------------------------------------------------------------------
1919 // CompileBroker::set_last_compile
1920 //
1921 // Record this compilation for debugging purposes.
1922 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1923 ResourceMark rm;
1924 char* method_name = method->name()->as_C_string();
1925 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1926 char current_method[CompilerCounters::cmname_buffer_length];
1927 size_t maxLen = CompilerCounters::cmname_buffer_length;
1929 if (UsePerfData) {
1930 const char* class_name = method->method_holder()->name()->as_C_string();
1932 size_t s1len = strlen(class_name);
1933 size_t s2len = strlen(method_name);
1935 // check if we need to truncate the string
1936 if (s1len + s2len + 2 > maxLen) {
1938 // the strategy is to lop off the leading characters of the
1939 // class name and the trailing characters of the method name.
1941 if (s2len + 2 > maxLen) {
1942 // lop of the entire class name string, let snprintf handle
1943 // truncation of the method name.
1944 class_name += s1len; // null string
1945 }
1946 else {
1947 // lop off the extra characters from the front of the class name
1948 class_name += ((s1len + s2len + 2) - maxLen);
1949 }
1950 }
1952 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1953 }
1955 if (CICountOSR && is_osr) {
1956 _last_compile_type = osr_compile;
1957 } else {
1958 _last_compile_type = normal_compile;
1959 }
1960 _last_compile_level = comp_level;
1962 if (UsePerfData) {
1963 CompilerCounters* counters = thread->counters();
1964 counters->set_current_method(current_method);
1965 counters->set_compile_type((jlong)_last_compile_type);
1966 }
1967 }
1970 // ------------------------------------------------------------------
1971 // CompileBroker::push_jni_handle_block
1972 //
1973 // Push on a new block of JNI handles.
1974 void CompileBroker::push_jni_handle_block() {
1975 JavaThread* thread = JavaThread::current();
1977 // Allocate a new block for JNI handles.
1978 // Inlined code from jni_PushLocalFrame()
1979 JNIHandleBlock* java_handles = thread->active_handles();
1980 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1981 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1982 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1983 thread->set_active_handles(compile_handles);
1984 }
1987 // ------------------------------------------------------------------
1988 // CompileBroker::pop_jni_handle_block
1989 //
1990 // Pop off the current block of JNI handles.
1991 void CompileBroker::pop_jni_handle_block() {
1992 JavaThread* thread = JavaThread::current();
1994 // Release our JNI handle block
1995 JNIHandleBlock* compile_handles = thread->active_handles();
1996 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1997 thread->set_active_handles(java_handles);
1998 compile_handles->set_pop_frame_link(NULL);
1999 JNIHandleBlock::release_block(compile_handles, thread); // may block
2000 }
2003 // ------------------------------------------------------------------
2004 // CompileBroker::check_break_at
2005 //
2006 // Should the compilation break at the current compilation.
2007 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2008 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2009 return true;
2010 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2011 return true;
2012 } else {
2013 return (compile_id == CIBreakAt);
2014 }
2015 }
2017 // ------------------------------------------------------------------
2018 // CompileBroker::collect_statistics
2019 //
2020 // Collect statistics about the compilation.
2022 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2023 bool success = task->is_success();
2024 methodHandle method (thread, task->method());
2025 uint compile_id = task->compile_id();
2026 bool is_osr = (task->osr_bci() != standard_entry_bci);
2027 nmethod* code = task->code();
2028 CompilerCounters* counters = thread->counters();
2030 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2031 MutexLocker locker(CompileStatistics_lock);
2033 // _perf variables are production performance counters which are
2034 // updated regardless of the setting of the CITime and CITimeEach flags
2035 //
2036 if (!success) {
2037 _total_bailout_count++;
2038 if (UsePerfData) {
2039 _perf_last_failed_method->set_value(counters->current_method());
2040 _perf_last_failed_type->set_value(counters->compile_type());
2041 _perf_total_bailout_count->inc();
2042 }
2043 } else if (code == NULL) {
2044 if (UsePerfData) {
2045 _perf_last_invalidated_method->set_value(counters->current_method());
2046 _perf_last_invalidated_type->set_value(counters->compile_type());
2047 _perf_total_invalidated_count->inc();
2048 }
2049 _total_invalidated_count++;
2050 } else {
2051 // Compilation succeeded
2053 // update compilation ticks - used by the implementation of
2054 // java.lang.management.CompilationMBean
2055 _perf_total_compilation->inc(time.ticks());
2057 if (CITime) {
2058 _t_total_compilation.add(time);
2059 if (is_osr) {
2060 _t_osr_compilation.add(time);
2061 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2062 } else {
2063 _t_standard_compilation.add(time);
2064 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2065 }
2066 }
2068 if (UsePerfData) {
2069 // save the name of the last method compiled
2070 _perf_last_method->set_value(counters->current_method());
2071 _perf_last_compile_type->set_value(counters->compile_type());
2072 _perf_last_compile_size->set_value(method->code_size() +
2073 task->num_inlined_bytecodes());
2074 if (is_osr) {
2075 _perf_osr_compilation->inc(time.ticks());
2076 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2077 } else {
2078 _perf_standard_compilation->inc(time.ticks());
2079 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2080 }
2081 }
2083 if (CITimeEach) {
2084 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2085 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2086 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2087 }
2089 // Collect counts of successful compilations
2090 _sum_nmethod_size += code->total_size();
2091 _sum_nmethod_code_size += code->insts_size();
2092 _total_compile_count++;
2094 if (UsePerfData) {
2095 _perf_sum_nmethod_size->inc( code->total_size());
2096 _perf_sum_nmethod_code_size->inc(code->insts_size());
2097 _perf_total_compile_count->inc();
2098 }
2100 if (is_osr) {
2101 if (UsePerfData) _perf_total_osr_compile_count->inc();
2102 _total_osr_compile_count++;
2103 } else {
2104 if (UsePerfData) _perf_total_standard_compile_count->inc();
2105 _total_standard_compile_count++;
2106 }
2107 }
2108 // set the current method for the thread to null
2109 if (UsePerfData) counters->set_current_method("");
2110 }
2114 void CompileBroker::print_times() {
2115 tty->cr();
2116 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2117 tty->print_cr("------------------------------------------------");
2118 //0000000000111111111122222222223333333333444444444455555555556666666666
2119 //0123456789012345678901234567890123456789012345678901234567890123456789
2120 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2121 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2122 CompileBroker::_t_standard_compilation.seconds(),
2123 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2124 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);
2126 if (compiler(CompLevel_simple) != NULL) {
2127 compiler(CompLevel_simple)->print_timers();
2128 }
2129 if (compiler(CompLevel_full_optimization) != NULL) {
2130 compiler(CompLevel_full_optimization)->print_timers();
2131 }
2132 tty->cr();
2133 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2134 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2135 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2136 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2137 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2138 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2139 tty->cr();
2140 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2141 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2142 }
2145 // Debugging output for failure
2146 void CompileBroker::print_last_compile() {
2147 if ( _last_compile_level != CompLevel_none &&
2148 compiler(_last_compile_level) != NULL &&
2149 _last_method_compiled != NULL &&
2150 _last_compile_type != no_compile) {
2151 if (_last_compile_type == osr_compile) {
2152 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2153 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2154 } else {
2155 tty->print_cr("Last parse: %d+++(%d) %s",
2156 _compilation_id, _last_compile_level, _last_method_compiled);
2157 }
2158 }
2159 }
2162 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2163 #ifndef PRODUCT
2164 st->print_cr("Compiler thread printing unimplemented.");
2165 st->cr();
2166 #endif
2167 }