Wed, 01 Feb 2012 07:59:01 -0800
7141200: log some interesting information in ring buffers for crashes
Reviewed-by: kvn, jrose, kevinw, brutisso, twisti, jmasa
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/methodDataOop.hpp"
35 #include "oops/methodOop.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/nativeLookup.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/init.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/os.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/sweeper.hpp"
46 #include "utilities/dtrace.hpp"
47 #include "utilities/events.hpp"
48 #ifdef COMPILER1
49 #include "c1/c1_Compiler.hpp"
50 #endif
51 #ifdef COMPILER2
52 #include "opto/c2compiler.hpp"
53 #endif
54 #ifdef SHARK
55 #include "shark/sharkCompiler.hpp"
56 #endif
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 msg = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print_compilation(&msg, true);
203 log(thread, "%s", (const char*)lm);
204 }
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm, nm->code_begin(), nm->code_end());
209 }
211 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
212 StringLogMessage lm;
213 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
214 if (retry_message != NULL) {
215 lm.append(" (%s)", retry_message);
216 }
217 lm.print("\n");
218 log(thread, "%s", (const char*)lm);
219 }
220 };
222 static CompilationLog* _compilation_log = NULL;
224 void compileBroker_init() {
225 if (LogEvents) {
226 _compilation_log = new CompilationLog();
227 }
228 }
230 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
231 CompilerThread* thread = CompilerThread::current();
232 thread->set_task(task);
233 CompileLog* log = thread->log();
234 if (log != NULL) task->log_task_start(log);
235 }
237 CompileTaskWrapper::~CompileTaskWrapper() {
238 CompilerThread* thread = CompilerThread::current();
239 CompileTask* task = thread->task();
240 CompileLog* log = thread->log();
241 if (log != NULL) task->log_task_done(log);
242 thread->set_task(NULL);
243 task->set_code_handle(NULL);
244 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress));
245 if (task->is_blocking()) {
246 MutexLocker notifier(task->lock(), thread);
247 task->mark_complete();
248 // Notify the waiting thread that the compilation has completed.
249 task->lock()->notify_all();
250 } else {
251 task->mark_complete();
253 // By convention, the compiling thread is responsible for
254 // recycling a non-blocking CompileTask.
255 CompileBroker::free_task(task);
256 }
257 }
260 // ------------------------------------------------------------------
261 // CompileTask::initialize
262 void CompileTask::initialize(int compile_id,
263 methodHandle method,
264 int osr_bci,
265 int comp_level,
266 methodHandle hot_method,
267 int hot_count,
268 const char* comment,
269 bool is_blocking) {
270 assert(!_lock->is_locked(), "bad locking");
272 _compile_id = compile_id;
273 _method = JNIHandles::make_global(method);
274 _osr_bci = osr_bci;
275 _is_blocking = is_blocking;
276 _comp_level = comp_level;
277 _num_inlined_bytecodes = 0;
279 _is_complete = false;
280 _is_success = false;
281 _code_handle = NULL;
283 _hot_method = NULL;
284 _hot_count = hot_count;
285 _time_queued = 0; // tidy
286 _comment = comment;
288 if (LogCompilation) {
289 _time_queued = os::elapsed_counter();
290 if (hot_method.not_null()) {
291 if (hot_method == method) {
292 _hot_method = _method;
293 } else {
294 _hot_method = JNIHandles::make_global(hot_method);
295 }
296 }
297 }
299 _next = NULL;
300 }
302 // ------------------------------------------------------------------
303 // CompileTask::code/set_code
304 nmethod* CompileTask::code() const {
305 if (_code_handle == NULL) return NULL;
306 return _code_handle->code();
307 }
308 void CompileTask::set_code(nmethod* nm) {
309 if (_code_handle == NULL && nm == NULL) return;
310 guarantee(_code_handle != NULL, "");
311 _code_handle->set_code(nm);
312 if (nm == NULL) _code_handle = NULL; // drop the handle also
313 }
315 // ------------------------------------------------------------------
316 // CompileTask::free
317 void CompileTask::free() {
318 set_code(NULL);
319 assert(!_lock->is_locked(), "Should not be locked when freed");
320 if (_hot_method != NULL && _hot_method != _method) {
321 JNIHandles::destroy_global(_hot_method);
322 }
323 JNIHandles::destroy_global(_method);
324 }
327 // ------------------------------------------------------------------
328 // CompileTask::print
329 void CompileTask::print() {
330 tty->print("<CompileTask compile_id=%d ", _compile_id);
331 tty->print("method=");
332 ((methodOop)JNIHandles::resolve(_method))->print_name(tty);
333 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
334 _osr_bci, bool_to_str(_is_blocking),
335 bool_to_str(_is_complete), bool_to_str(_is_success));
336 }
339 // ------------------------------------------------------------------
340 // CompileTask::print_line_on_error
341 //
342 // This function is called by fatal error handler when the thread
343 // causing troubles is a compiler thread.
344 //
345 // Do not grab any lock, do not allocate memory.
346 //
347 // Otherwise it's the same as CompileTask::print_line()
348 //
349 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
350 // print compiler name
351 st->print("%s:", CompileBroker::compiler(comp_level())->name());
352 print_compilation(st);
353 }
355 // ------------------------------------------------------------------
356 // CompileTask::print_line
357 void CompileTask::print_line() {
358 ttyLocker ttyl; // keep the following output all in one block
359 // print compiler name if requested
360 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
361 print_compilation();
362 }
365 // ------------------------------------------------------------------
366 // CompileTask::print_compilation_impl
367 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level,
368 bool is_osr_method, int osr_bci, bool is_blocking,
369 const char* msg, bool short_form) {
370 if (!short_form) {
371 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
372 }
373 st->print("%4d ", compile_id); // print compilation number
375 // For unloaded methods the transition to zombie occurs after the
376 // method is cleared so it's impossible to report accurate
377 // information for that case.
378 bool is_synchronized = false;
379 bool has_exception_handler = false;
380 bool is_native = false;
381 if (method != NULL) {
382 is_synchronized = method->is_synchronized();
383 has_exception_handler = method->has_exception_handler();
384 is_native = method->is_native();
385 }
386 // method attributes
387 const char compile_type = is_osr_method ? '%' : ' ';
388 const char sync_char = is_synchronized ? 's' : ' ';
389 const char exception_char = has_exception_handler ? '!' : ' ';
390 const char blocking_char = is_blocking ? 'b' : ' ';
391 const char native_char = is_native ? 'n' : ' ';
393 // print method attributes
394 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
396 if (TieredCompilation) {
397 if (comp_level != -1) st->print("%d ", comp_level);
398 else st->print("- ");
399 }
400 st->print(" "); // more indent
402 if (method == NULL) {
403 st->print("(method)");
404 } else {
405 method->print_short_name(st);
406 if (is_osr_method) {
407 st->print(" @ %d", osr_bci);
408 }
409 st->print(" (%d bytes)", method->code_size());
410 }
412 if (msg != NULL) {
413 st->print(" %s", msg);
414 }
415 if (!short_form) {
416 st->cr();
417 }
418 }
420 // ------------------------------------------------------------------
421 // CompileTask::print_inlining
422 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
423 // 1234567
424 st->print(" "); // print timestamp
425 // 1234
426 st->print(" "); // print compilation number
428 // method attributes
429 const char sync_char = method->is_synchronized() ? 's' : ' ';
430 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
431 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
433 // print method attributes
434 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
436 if (TieredCompilation) {
437 st->print(" ");
438 }
439 st->print(" "); // more indent
440 st->print(" "); // initial inlining indent
442 for (int i = 0; i < inline_level; i++) st->print(" ");
444 st->print("@ %d ", bci); // print bci
445 method->print_short_name(st);
446 st->print(" (%d bytes)", method->code_size());
448 if (msg != NULL) {
449 st->print(" %s", msg);
450 }
451 st->cr();
452 }
454 // ------------------------------------------------------------------
455 // CompileTask::print_inline_indent
456 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
457 // 1234567
458 st->print(" "); // print timestamp
459 // 1234
460 st->print(" "); // print compilation number
461 // %s!bn
462 st->print(" "); // print method attributes
463 if (TieredCompilation) {
464 st->print(" ");
465 }
466 st->print(" "); // more indent
467 st->print(" "); // initial inlining indent
468 for (int i = 0; i < inline_level; i++) st->print(" ");
469 }
471 // ------------------------------------------------------------------
472 // CompileTask::print_compilation
473 void CompileTask::print_compilation(outputStream* st, bool short_form) {
474 oop rem = JNIHandles::resolve(method_handle());
475 assert(rem != NULL && rem->is_method(), "must be");
476 methodOop method = (methodOop) rem;
477 bool is_osr_method = osr_bci() != InvocationEntryBci;
478 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), NULL, short_form);
479 }
481 // ------------------------------------------------------------------
482 // CompileTask::log_task
483 void CompileTask::log_task(xmlStream* log) {
484 Thread* thread = Thread::current();
485 methodHandle method(thread,
486 (methodOop)JNIHandles::resolve(method_handle()));
487 ResourceMark rm(thread);
489 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
490 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id);
491 if (_osr_bci != CompileBroker::standard_entry_bci) {
492 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
493 } // else compile_kind='c2c'
494 if (!method.is_null()) log->method(method);
495 if (_osr_bci != CompileBroker::standard_entry_bci) {
496 log->print(" osr_bci='%d'", _osr_bci);
497 }
498 if (_comp_level != CompLevel_highest_tier) {
499 log->print(" level='%d'", _comp_level);
500 }
501 if (_is_blocking) {
502 log->print(" blocking='1'");
503 }
504 log->stamp();
505 }
508 // ------------------------------------------------------------------
509 // CompileTask::log_task_queued
510 void CompileTask::log_task_queued() {
511 Thread* thread = Thread::current();
512 ttyLocker ttyl;
513 ResourceMark rm(thread);
515 xtty->begin_elem("task_queued");
516 log_task(xtty);
517 if (_comment != NULL) {
518 xtty->print(" comment='%s'", _comment);
519 }
520 if (_hot_method != NULL) {
521 methodHandle hot(thread,
522 (methodOop)JNIHandles::resolve(_hot_method));
523 methodHandle method(thread,
524 (methodOop)JNIHandles::resolve(_method));
525 if (hot() != method()) {
526 xtty->method(hot);
527 }
528 }
529 if (_hot_count != 0) {
530 xtty->print(" hot_count='%d'", _hot_count);
531 }
532 xtty->end_elem();
533 }
536 // ------------------------------------------------------------------
537 // CompileTask::log_task_start
538 void CompileTask::log_task_start(CompileLog* log) {
539 log->begin_head("task");
540 log_task(log);
541 log->end_head();
542 }
545 // ------------------------------------------------------------------
546 // CompileTask::log_task_done
547 void CompileTask::log_task_done(CompileLog* log) {
548 Thread* thread = Thread::current();
549 methodHandle method(thread,
550 (methodOop)JNIHandles::resolve(method_handle()));
551 ResourceMark rm(thread);
553 // <task_done ... stamp='1.234'> </task>
554 nmethod* nm = code();
555 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
556 _is_success, nm == NULL ? 0 : nm->content_size(),
557 method->invocation_count());
558 int bec = method->backedge_count();
559 if (bec != 0) log->print(" backedge_count='%d'", bec);
560 // Note: "_is_complete" is about to be set, but is not.
561 if (_num_inlined_bytecodes != 0) {
562 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
563 }
564 log->stamp();
565 log->end_elem();
566 log->tail("task");
567 log->clear_identities(); // next task will have different CI
568 if (log->unflushed_count() > 2000) {
569 log->flush();
570 }
571 log->mark_file_end();
572 }
576 // ------------------------------------------------------------------
577 // CompileQueue::add
578 //
579 // Add a CompileTask to a CompileQueue
580 void CompileQueue::add(CompileTask* task) {
581 assert(lock()->owned_by_self(), "must own lock");
583 task->set_next(NULL);
584 task->set_prev(NULL);
586 if (_last == NULL) {
587 // The compile queue is empty.
588 assert(_first == NULL, "queue is empty");
589 _first = task;
590 _last = task;
591 } else {
592 // Append the task to the queue.
593 assert(_last->next() == NULL, "not last");
594 _last->set_next(task);
595 task->set_prev(_last);
596 _last = task;
597 }
598 ++_size;
600 // Mark the method as being in the compile queue.
601 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation();
603 if (CIPrintCompileQueue) {
604 print();
605 }
607 if (LogCompilation && xtty != NULL) {
608 task->log_task_queued();
609 }
611 // Notify CompilerThreads that a task is available.
612 lock()->notify_all();
613 }
615 // ------------------------------------------------------------------
616 // CompileQueue::get
617 //
618 // Get the next CompileTask from a CompileQueue
619 CompileTask* CompileQueue::get() {
620 NMethodSweeper::possibly_sweep();
622 MutexLocker locker(lock());
623 // Wait for an available CompileTask.
624 while (_first == NULL) {
625 // There is no work to be done right now. Wait.
626 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
627 // During the emergency sweeping periods, wake up and sweep occasionally
628 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
629 if (timedout) {
630 MutexUnlocker ul(lock());
631 // When otherwise not busy, run nmethod sweeping
632 NMethodSweeper::possibly_sweep();
633 }
634 } else {
635 // During normal operation no need to wake up on timer
636 lock()->wait();
637 }
638 }
639 CompileTask* task = CompilationPolicy::policy()->select_task(this);
640 remove(task);
641 return task;
642 }
644 void CompileQueue::remove(CompileTask* task)
645 {
646 assert(lock()->owned_by_self(), "must own lock");
647 if (task->prev() != NULL) {
648 task->prev()->set_next(task->next());
649 } else {
650 // max is the first element
651 assert(task == _first, "Sanity");
652 _first = task->next();
653 }
655 if (task->next() != NULL) {
656 task->next()->set_prev(task->prev());
657 } else {
658 // max is the last element
659 assert(task == _last, "Sanity");
660 _last = task->prev();
661 }
662 --_size;
663 }
665 // ------------------------------------------------------------------
666 // CompileQueue::print
667 void CompileQueue::print() {
668 tty->print_cr("Contents of %s", name());
669 tty->print_cr("----------------------");
670 CompileTask* task = _first;
671 while (task != NULL) {
672 task->print_line();
673 task = task->next();
674 }
675 tty->print_cr("----------------------");
676 }
678 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
680 _current_method[0] = '\0';
681 _compile_type = CompileBroker::no_compile;
683 if (UsePerfData) {
684 ResourceMark rm;
686 // create the thread instance name space string - don't create an
687 // instance subspace if instance is -1 - keeps the adapterThread
688 // counters from having a ".0" namespace.
689 const char* thread_i = (instance == -1) ? thread_name :
690 PerfDataManager::name_space(thread_name, instance);
693 char* name = PerfDataManager::counter_name(thread_i, "method");
694 _perf_current_method =
695 PerfDataManager::create_string_variable(SUN_CI, name,
696 cmname_buffer_length,
697 _current_method, CHECK);
699 name = PerfDataManager::counter_name(thread_i, "type");
700 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
701 PerfData::U_None,
702 (jlong)_compile_type,
703 CHECK);
705 name = PerfDataManager::counter_name(thread_i, "time");
706 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
707 PerfData::U_Ticks, CHECK);
709 name = PerfDataManager::counter_name(thread_i, "compiles");
710 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
711 PerfData::U_Events, CHECK);
712 }
713 }
715 // ------------------------------------------------------------------
716 // CompileBroker::compilation_init
717 //
718 // Initialize the Compilation object
719 void CompileBroker::compilation_init() {
720 _last_method_compiled[0] = '\0';
722 #ifndef SHARK
723 // Set the interface to the current compiler(s).
724 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
725 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
726 #ifdef COMPILER1
727 if (c1_count > 0) {
728 _compilers[0] = new Compiler();
729 }
730 #endif // COMPILER1
732 #ifdef COMPILER2
733 if (c2_count > 0) {
734 _compilers[1] = new C2Compiler();
735 }
736 #endif // COMPILER2
738 #else // SHARK
739 int c1_count = 0;
740 int c2_count = 1;
742 _compilers[1] = new SharkCompiler();
743 #endif // SHARK
745 // Initialize the CompileTask free list
746 _task_free_list = NULL;
748 // Start the CompilerThreads
749 init_compiler_threads(c1_count, c2_count);
750 // totalTime performance counter is always created as it is required
751 // by the implementation of java.lang.management.CompilationMBean.
752 {
753 EXCEPTION_MARK;
754 _perf_total_compilation =
755 PerfDataManager::create_counter(JAVA_CI, "totalTime",
756 PerfData::U_Ticks, CHECK);
757 }
760 if (UsePerfData) {
762 EXCEPTION_MARK;
764 // create the jvmstat performance counters
765 _perf_osr_compilation =
766 PerfDataManager::create_counter(SUN_CI, "osrTime",
767 PerfData::U_Ticks, CHECK);
769 _perf_standard_compilation =
770 PerfDataManager::create_counter(SUN_CI, "standardTime",
771 PerfData::U_Ticks, CHECK);
773 _perf_total_bailout_count =
774 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
775 PerfData::U_Events, CHECK);
777 _perf_total_invalidated_count =
778 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
779 PerfData::U_Events, CHECK);
781 _perf_total_compile_count =
782 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
783 PerfData::U_Events, CHECK);
784 _perf_total_osr_compile_count =
785 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
786 PerfData::U_Events, CHECK);
788 _perf_total_standard_compile_count =
789 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
790 PerfData::U_Events, CHECK);
792 _perf_sum_osr_bytes_compiled =
793 PerfDataManager::create_counter(SUN_CI, "osrBytes",
794 PerfData::U_Bytes, CHECK);
796 _perf_sum_standard_bytes_compiled =
797 PerfDataManager::create_counter(SUN_CI, "standardBytes",
798 PerfData::U_Bytes, CHECK);
800 _perf_sum_nmethod_size =
801 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
802 PerfData::U_Bytes, CHECK);
804 _perf_sum_nmethod_code_size =
805 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
806 PerfData::U_Bytes, CHECK);
808 _perf_last_method =
809 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
810 CompilerCounters::cmname_buffer_length,
811 "", CHECK);
813 _perf_last_failed_method =
814 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
815 CompilerCounters::cmname_buffer_length,
816 "", CHECK);
818 _perf_last_invalidated_method =
819 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
820 CompilerCounters::cmname_buffer_length,
821 "", CHECK);
823 _perf_last_compile_type =
824 PerfDataManager::create_variable(SUN_CI, "lastType",
825 PerfData::U_None,
826 (jlong)CompileBroker::no_compile,
827 CHECK);
829 _perf_last_compile_size =
830 PerfDataManager::create_variable(SUN_CI, "lastSize",
831 PerfData::U_Bytes,
832 (jlong)CompileBroker::no_compile,
833 CHECK);
836 _perf_last_failed_type =
837 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
838 PerfData::U_None,
839 (jlong)CompileBroker::no_compile,
840 CHECK);
842 _perf_last_invalidated_type =
843 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
844 PerfData::U_None,
845 (jlong)CompileBroker::no_compile,
846 CHECK);
847 }
849 _initialized = true;
850 }
854 // ------------------------------------------------------------------
855 // CompileBroker::make_compiler_thread
856 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
857 CompilerThread* compiler_thread = NULL;
859 klassOop k =
860 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
861 true, CHECK_0);
862 instanceKlassHandle klass (THREAD, k);
863 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
864 Handle string = java_lang_String::create_from_str(name, CHECK_0);
866 // Initialize thread_oop to put it into the system threadGroup
867 Handle thread_group (THREAD, Universe::system_thread_group());
868 JavaValue result(T_VOID);
869 JavaCalls::call_special(&result, thread_oop,
870 klass,
871 vmSymbols::object_initializer_name(),
872 vmSymbols::threadgroup_string_void_signature(),
873 thread_group,
874 string,
875 CHECK_0);
877 {
878 MutexLocker mu(Threads_lock, THREAD);
879 compiler_thread = new CompilerThread(queue, counters);
880 // At this point the new CompilerThread data-races with this startup
881 // thread (which I believe is the primoridal thread and NOT the VM
882 // thread). This means Java bytecodes being executed at startup can
883 // queue compile jobs which will run at whatever default priority the
884 // newly created CompilerThread runs at.
887 // At this point it may be possible that no osthread was created for the
888 // JavaThread due to lack of memory. We would have to throw an exception
889 // in that case. However, since this must work and we do not allow
890 // exceptions anyway, check and abort if this fails.
892 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
893 vm_exit_during_initialization("java.lang.OutOfMemoryError",
894 "unable to create new native thread");
895 }
897 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
899 // Note that this only sets the JavaThread _priority field, which by
900 // definition is limited to Java priorities and not OS priorities.
901 // The os-priority is set in the CompilerThread startup code itself
902 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
903 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler
904 // threads never have their OS priority set. The assumption here is to
905 // enable the Performance group to do flag tuning, figure out a suitable
906 // CompilerThreadPriority, and then remove this 'if' statement (and
907 // comment) and unconditionally set the priority.
909 // Compiler Threads should be at the highest Priority
910 if ( CompilerThreadPriority != -1 )
911 os::set_native_priority( compiler_thread, CompilerThreadPriority );
912 else
913 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]);
915 // Note that I cannot call os::set_priority because it expects Java
916 // priorities and I am *explicitly* using OS priorities so that it's
917 // possible to set the compiler thread priority higher than any Java
918 // thread.
920 java_lang_Thread::set_daemon(thread_oop());
922 compiler_thread->set_threadObj(thread_oop());
923 Threads::add(compiler_thread);
924 Thread::start(compiler_thread);
925 }
926 // Let go of Threads_lock before yielding
927 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
929 return compiler_thread;
930 }
933 // ------------------------------------------------------------------
934 // CompileBroker::init_compiler_threads
935 //
936 // Initialize the compilation queue
937 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
938 EXCEPTION_MARK;
939 #if !defined(ZERO) && !defined(SHARK)
940 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
941 #endif // !ZERO && !SHARK
942 if (c2_compiler_count > 0) {
943 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
944 }
945 if (c1_compiler_count > 0) {
946 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
947 }
949 int compiler_count = c1_compiler_count + c2_compiler_count;
951 _method_threads =
952 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
954 char name_buffer[256];
955 for (int i = 0; i < c2_compiler_count; i++) {
956 // Create a name for our thread.
957 sprintf(name_buffer, "C2 CompilerThread%d", i);
958 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
959 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
960 _method_threads->append(new_thread);
961 }
963 for (int i = c2_compiler_count; i < compiler_count; i++) {
964 // Create a name for our thread.
965 sprintf(name_buffer, "C1 CompilerThread%d", i);
966 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
967 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
968 _method_threads->append(new_thread);
969 }
971 if (UsePerfData) {
972 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
973 compiler_count, CHECK);
974 }
975 }
977 // ------------------------------------------------------------------
978 // CompileBroker::is_idle
979 bool CompileBroker::is_idle() {
980 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
981 return false;
982 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
983 return false;
984 } else {
985 int num_threads = _method_threads->length();
986 for (int i=0; i<num_threads; i++) {
987 if (_method_threads->at(i)->task() != NULL) {
988 return false;
989 }
990 }
992 // No pending or active compilations.
993 return true;
994 }
995 }
998 // ------------------------------------------------------------------
999 // CompileBroker::compile_method
1000 //
1001 // Request compilation of a method.
1002 void CompileBroker::compile_method_base(methodHandle method,
1003 int osr_bci,
1004 int comp_level,
1005 methodHandle hot_method,
1006 int hot_count,
1007 const char* comment,
1008 Thread* thread) {
1009 // do nothing if compiler thread(s) is not available
1010 if (!_initialized ) {
1011 return;
1012 }
1014 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1015 assert(method->method_holder()->klass_part()->oop_is_instance(),
1016 "sanity check");
1017 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
1018 "method holder must be initialized");
1020 if (CIPrintRequests) {
1021 tty->print("request: ");
1022 method->print_short_name(tty);
1023 if (osr_bci != InvocationEntryBci) {
1024 tty->print(" osr_bci: %d", osr_bci);
1025 }
1026 tty->print(" comment: %s count: %d", comment, hot_count);
1027 if (!hot_method.is_null()) {
1028 tty->print(" hot: ");
1029 if (hot_method() != method()) {
1030 hot_method->print_short_name(tty);
1031 } else {
1032 tty->print("yes");
1033 }
1034 }
1035 tty->cr();
1036 }
1038 // A request has been made for compilation. Before we do any
1039 // real work, check to see if the method has been compiled
1040 // in the meantime with a definitive result.
1041 if (compilation_is_complete(method, osr_bci, comp_level)) {
1042 return;
1043 }
1045 #ifndef PRODUCT
1046 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1047 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1048 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1049 return;
1050 }
1051 }
1052 #endif
1054 // If this method is already in the compile queue, then
1055 // we do not block the current thread.
1056 if (compilation_is_in_queue(method, osr_bci)) {
1057 // We may want to decay our counter a bit here to prevent
1058 // multiple denied requests for compilation. This is an
1059 // open compilation policy issue. Note: The other possibility,
1060 // in the case that this is a blocking compile request, is to have
1061 // all subsequent blocking requesters wait for completion of
1062 // ongoing compiles. Note that in this case we'll need a protocol
1063 // for freeing the associated compile tasks. [Or we could have
1064 // a single static monitor on which all these waiters sleep.]
1065 return;
1066 }
1068 // If the requesting thread is holding the pending list lock
1069 // then we just return. We can't risk blocking while holding
1070 // the pending list lock or a 3-way deadlock may occur
1071 // between the reference handler thread, a GC (instigated
1072 // by a compiler thread), and compiled method registration.
1073 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1074 return;
1075 }
1077 // Outputs from the following MutexLocker block:
1078 CompileTask* task = NULL;
1079 bool blocking = false;
1080 CompileQueue* queue = compile_queue(comp_level);
1082 // Acquire our lock.
1083 {
1084 MutexLocker locker(queue->lock(), thread);
1086 // Make sure the method has not slipped into the queues since
1087 // last we checked; note that those checks were "fast bail-outs".
1088 // Here we need to be more careful, see 14012000 below.
1089 if (compilation_is_in_queue(method, osr_bci)) {
1090 return;
1091 }
1093 // We need to check again to see if the compilation has
1094 // completed. A previous compilation may have registered
1095 // some result.
1096 if (compilation_is_complete(method, osr_bci, comp_level)) {
1097 return;
1098 }
1100 // We now know that this compilation is not pending, complete,
1101 // or prohibited. Assign a compile_id to this compilation
1102 // and check to see if it is in our [Start..Stop) range.
1103 uint compile_id = assign_compile_id(method, osr_bci);
1104 if (compile_id == 0) {
1105 // The compilation falls outside the allowed range.
1106 return;
1107 }
1109 // Should this thread wait for completion of the compile?
1110 blocking = is_compile_blocking(method, osr_bci);
1112 // We will enter the compilation in the queue.
1113 // 14012000: Note that this sets the queued_for_compile bits in
1114 // the target method. We can now reason that a method cannot be
1115 // queued for compilation more than once, as follows:
1116 // Before a thread queues a task for compilation, it first acquires
1117 // the compile queue lock, then checks if the method's queued bits
1118 // are set or it has already been compiled. Thus there can not be two
1119 // instances of a compilation task for the same method on the
1120 // compilation queue. Consider now the case where the compilation
1121 // thread has already removed a task for that method from the queue
1122 // and is in the midst of compiling it. In this case, the
1123 // queued_for_compile bits must be set in the method (and these
1124 // will be visible to the current thread, since the bits were set
1125 // under protection of the compile queue lock, which we hold now.
1126 // When the compilation completes, the compiler thread first sets
1127 // the compilation result and then clears the queued_for_compile
1128 // bits. Neither of these actions are protected by a barrier (or done
1129 // under the protection of a lock), so the only guarantee we have
1130 // (on machines with TSO (Total Store Order)) is that these values
1131 // will update in that order. As a result, the only combinations of
1132 // these bits that the current thread will see are, in temporal order:
1133 // <RESULT, QUEUE> :
1134 // <0, 1> : in compile queue, but not yet compiled
1135 // <1, 1> : compiled but queue bit not cleared
1136 // <1, 0> : compiled and queue bit cleared
1137 // Because we first check the queue bits then check the result bits,
1138 // we are assured that we cannot introduce a duplicate task.
1139 // Note that if we did the tests in the reverse order (i.e. check
1140 // result then check queued bit), we could get the result bit before
1141 // the compilation completed, and the queue bit after the compilation
1142 // completed, and end up introducing a "duplicate" (redundant) task.
1143 // In that case, the compiler thread should first check if a method
1144 // has already been compiled before trying to compile it.
1145 // NOTE: in the event that there are multiple compiler threads and
1146 // there is de-optimization/recompilation, things will get hairy,
1147 // and in that case it's best to protect both the testing (here) of
1148 // these bits, and their updating (here and elsewhere) under a
1149 // common lock.
1150 task = create_compile_task(queue,
1151 compile_id, method,
1152 osr_bci, comp_level,
1153 hot_method, hot_count, comment,
1154 blocking);
1155 }
1157 if (blocking) {
1158 wait_for_completion(task);
1159 }
1160 }
1163 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1164 int comp_level,
1165 methodHandle hot_method, int hot_count,
1166 const char* comment, Thread* THREAD) {
1167 // make sure arguments make sense
1168 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method");
1169 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1170 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1171 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
1173 if (!TieredCompilation) {
1174 comp_level = CompLevel_highest_tier;
1175 }
1177 // return quickly if possible
1179 // lock, make sure that the compilation
1180 // isn't prohibited in a straightforward way.
1182 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
1183 return NULL;
1184 }
1186 if (osr_bci == InvocationEntryBci) {
1187 // standard compilation
1188 nmethod* method_code = method->code();
1189 if (method_code != NULL) {
1190 if (compilation_is_complete(method, osr_bci, comp_level)) {
1191 return method_code;
1192 }
1193 }
1194 if (method->is_not_compilable(comp_level)) return NULL;
1196 if (UseCodeCacheFlushing) {
1197 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1198 if (saved != NULL) {
1199 method->set_code(method, saved);
1200 return saved;
1201 }
1202 }
1204 } else {
1205 // osr compilation
1206 #ifndef TIERED
1207 // seems like an assert of dubious value
1208 assert(comp_level == CompLevel_highest_tier,
1209 "all OSR compiles are assumed to be at a single compilation lavel");
1210 #endif // TIERED
1211 // We accept a higher level osr method
1212 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1213 if (nm != NULL) return nm;
1214 if (method->is_not_osr_compilable()) return NULL;
1215 }
1217 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1218 // some prerequisites that are compiler specific
1219 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) {
1220 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1221 // Resolve all classes seen in the signature of the method
1222 // we are compiling.
1223 methodOopDesc::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1224 }
1226 // If the method is native, do the lookup in the thread requesting
1227 // the compilation. Native lookups can load code, which is not
1228 // permitted during compilation.
1229 //
1230 // Note: A native method implies non-osr compilation which is
1231 // checked with an assertion at the entry of this method.
1232 if (method->is_native()) {
1233 bool in_base_library;
1234 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1235 if (HAS_PENDING_EXCEPTION) {
1236 // In case of an exception looking up the method, we just forget
1237 // about it. The interpreter will kick-in and throw the exception.
1238 method->set_not_compilable(); // implies is_not_osr_compilable()
1239 CLEAR_PENDING_EXCEPTION;
1240 return NULL;
1241 }
1242 assert(method->has_native_function(), "must have native code by now");
1243 }
1245 // RedefineClasses() has replaced this method; just return
1246 if (method->is_old()) {
1247 return NULL;
1248 }
1250 // JVMTI -- post_compile_event requires jmethod_id() that may require
1251 // a lock the compiling thread can not acquire. Prefetch it here.
1252 if (JvmtiExport::should_post_compiled_method_load()) {
1253 method->jmethod_id();
1254 }
1256 // If the compiler is shut off due to code cache flushing or otherwise,
1257 // fail out now so blocking compiles dont hang the java thread
1258 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1259 CompilationPolicy::policy()->delay_compilation(method());
1260 return NULL;
1261 }
1263 // do the compilation
1264 if (method->is_native()) {
1265 if (!PreferInterpreterNativeStubs) {
1266 // Acquire our lock.
1267 int compile_id;
1268 {
1269 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1270 compile_id = assign_compile_id(method, standard_entry_bci);
1271 }
1272 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1273 } else {
1274 return NULL;
1275 }
1276 } else {
1277 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1278 }
1280 // return requested nmethod
1281 // We accept a higher level osr method
1282 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1283 }
1286 // ------------------------------------------------------------------
1287 // CompileBroker::compilation_is_complete
1288 //
1289 // See if compilation of this method is already complete.
1290 bool CompileBroker::compilation_is_complete(methodHandle method,
1291 int osr_bci,
1292 int comp_level) {
1293 bool is_osr = (osr_bci != standard_entry_bci);
1294 if (is_osr) {
1295 if (method->is_not_osr_compilable()) {
1296 return true;
1297 } else {
1298 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1299 return (result != NULL);
1300 }
1301 } else {
1302 if (method->is_not_compilable(comp_level)) {
1303 return true;
1304 } else {
1305 nmethod* result = method->code();
1306 if (result == NULL) return false;
1307 return comp_level == result->comp_level();
1308 }
1309 }
1310 }
1313 // ------------------------------------------------------------------
1314 // CompileBroker::compilation_is_in_queue
1315 //
1316 // See if this compilation is already requested.
1317 //
1318 // Implementation note: there is only a single "is in queue" bit
1319 // for each method. This means that the check below is overly
1320 // conservative in the sense that an osr compilation in the queue
1321 // will block a normal compilation from entering the queue (and vice
1322 // versa). This can be remedied by a full queue search to disambiguate
1323 // cases. If it is deemed profitible, this may be done.
1324 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1325 int osr_bci) {
1326 return method->queued_for_compilation();
1327 }
1329 // ------------------------------------------------------------------
1330 // CompileBroker::compilation_is_prohibited
1331 //
1332 // See if this compilation is not allowed.
1333 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1334 bool is_native = method->is_native();
1335 // Some compilers may not support the compilation of natives.
1336 if (is_native &&
1337 (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1338 method->set_not_compilable_quietly(comp_level);
1339 return true;
1340 }
1342 bool is_osr = (osr_bci != standard_entry_bci);
1343 // Some compilers may not support on stack replacement.
1344 if (is_osr &&
1345 (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1346 method->set_not_osr_compilable();
1347 return true;
1348 }
1350 // The method may be explicitly excluded by the user.
1351 bool quietly;
1352 if (CompilerOracle::should_exclude(method, quietly)) {
1353 if (!quietly) {
1354 // This does not happen quietly...
1355 ResourceMark rm;
1356 tty->print("### Excluding %s:%s",
1357 method->is_native() ? "generation of native wrapper" : "compile",
1358 (method->is_static() ? " static" : ""));
1359 method->print_short_name(tty);
1360 tty->cr();
1361 }
1362 method->set_not_compilable_quietly();
1363 }
1365 return false;
1366 }
1369 // ------------------------------------------------------------------
1370 // CompileBroker::assign_compile_id
1371 //
1372 // Assign a serialized id number to this compilation request. If the
1373 // number falls out of the allowed range, return a 0. OSR
1374 // compilations may be numbered separately from regular compilations
1375 // if certain debugging flags are used.
1376 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1377 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1378 "must hold the compilation queue lock");
1379 bool is_osr = (osr_bci != standard_entry_bci);
1380 uint id;
1381 if (CICountOSR && is_osr) {
1382 id = ++_osr_compilation_id;
1383 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1384 return id;
1385 }
1386 } else {
1387 id = ++_compilation_id;
1388 if ((uint)CIStart <= id && id < (uint)CIStop) {
1389 return id;
1390 }
1391 }
1393 // Method was not in the appropriate compilation range.
1394 method->set_not_compilable_quietly();
1395 return 0;
1396 }
1399 // ------------------------------------------------------------------
1400 // CompileBroker::is_compile_blocking
1401 //
1402 // Should the current thread be blocked until this compilation request
1403 // has been fulfilled?
1404 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1405 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1406 return !BackgroundCompilation;
1407 }
1410 // ------------------------------------------------------------------
1411 // CompileBroker::preload_classes
1412 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1413 // Move this code over from c1_Compiler.cpp
1414 ShouldNotReachHere();
1415 }
1418 // ------------------------------------------------------------------
1419 // CompileBroker::create_compile_task
1420 //
1421 // Create a CompileTask object representing the current request for
1422 // compilation. Add this task to the queue.
1423 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1424 int compile_id,
1425 methodHandle method,
1426 int osr_bci,
1427 int comp_level,
1428 methodHandle hot_method,
1429 int hot_count,
1430 const char* comment,
1431 bool blocking) {
1432 CompileTask* new_task = allocate_task();
1433 new_task->initialize(compile_id, method, osr_bci, comp_level,
1434 hot_method, hot_count, comment,
1435 blocking);
1436 queue->add(new_task);
1437 return new_task;
1438 }
1441 // ------------------------------------------------------------------
1442 // CompileBroker::allocate_task
1443 //
1444 // Allocate a CompileTask, from the free list if possible.
1445 CompileTask* CompileBroker::allocate_task() {
1446 MutexLocker locker(CompileTaskAlloc_lock);
1447 CompileTask* task = NULL;
1448 if (_task_free_list != NULL) {
1449 task = _task_free_list;
1450 _task_free_list = task->next();
1451 task->set_next(NULL);
1452 } else {
1453 task = new CompileTask();
1454 task->set_next(NULL);
1455 }
1456 return task;
1457 }
1460 // ------------------------------------------------------------------
1461 // CompileBroker::free_task
1462 //
1463 // Add a task to the free list.
1464 void CompileBroker::free_task(CompileTask* task) {
1465 MutexLocker locker(CompileTaskAlloc_lock);
1466 task->free();
1467 task->set_next(_task_free_list);
1468 _task_free_list = task;
1469 }
1472 // ------------------------------------------------------------------
1473 // CompileBroker::wait_for_completion
1474 //
1475 // Wait for the given method CompileTask to complete.
1476 void CompileBroker::wait_for_completion(CompileTask* task) {
1477 if (CIPrintCompileQueue) {
1478 tty->print_cr("BLOCKING FOR COMPILE");
1479 }
1481 assert(task->is_blocking(), "can only wait on blocking task");
1483 JavaThread *thread = JavaThread::current();
1484 thread->set_blocked_on_compilation(true);
1486 methodHandle method(thread,
1487 (methodOop)JNIHandles::resolve(task->method_handle()));
1488 {
1489 MutexLocker waiter(task->lock(), thread);
1491 while (!task->is_complete())
1492 task->lock()->wait();
1493 }
1494 // It is harmless to check this status without the lock, because
1495 // completion is a stable property (until the task object is recycled).
1496 assert(task->is_complete(), "Compilation should have completed");
1497 assert(task->code_handle() == NULL, "must be reset");
1499 thread->set_blocked_on_compilation(false);
1501 // By convention, the waiter is responsible for recycling a
1502 // blocking CompileTask. Since there is only one waiter ever
1503 // waiting on a CompileTask, we know that no one else will
1504 // be using this CompileTask; we can free it.
1505 free_task(task);
1506 }
1508 // ------------------------------------------------------------------
1509 // CompileBroker::compiler_thread_loop
1510 //
1511 // The main loop run by a CompilerThread.
1512 void CompileBroker::compiler_thread_loop() {
1513 CompilerThread* thread = CompilerThread::current();
1514 CompileQueue* queue = thread->queue();
1516 // For the thread that initializes the ciObjectFactory
1517 // this resource mark holds all the shared objects
1518 ResourceMark rm;
1520 // First thread to get here will initialize the compiler interface
1522 if (!ciObjectFactory::is_initialized()) {
1523 ASSERT_IN_VM;
1524 MutexLocker only_one (CompileThread_lock, thread);
1525 if (!ciObjectFactory::is_initialized()) {
1526 ciObjectFactory::initialize();
1527 }
1528 }
1530 // Open a log.
1531 if (LogCompilation) {
1532 init_compiler_thread_log();
1533 }
1534 CompileLog* log = thread->log();
1535 if (log != NULL) {
1536 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1537 os::current_thread_id(),
1538 os::current_process_id());
1539 log->stamp();
1540 log->end_elem();
1541 }
1543 while (true) {
1544 {
1545 // We need this HandleMark to avoid leaking VM handles.
1546 HandleMark hm(thread);
1548 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) {
1549 // the code cache is really full
1550 handle_full_code_cache();
1551 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1552 // Attempt to start cleaning the code cache while there is still a little headroom
1553 NMethodSweeper::handle_full_code_cache(false);
1554 }
1556 CompileTask* task = queue->get();
1558 // Give compiler threads an extra quanta. They tend to be bursty and
1559 // this helps the compiler to finish up the job.
1560 if( CompilerThreadHintNoPreempt )
1561 os::hint_no_preempt();
1563 // trace per thread time and compile statistics
1564 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1565 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1567 // Assign the task to the current thread. Mark this compilation
1568 // thread as active for the profiler.
1569 CompileTaskWrapper ctw(task);
1570 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1571 task->set_code_handle(&result_handle);
1572 methodHandle method(thread,
1573 (methodOop)JNIHandles::resolve(task->method_handle()));
1575 // Never compile a method if breakpoints are present in it
1576 if (method()->number_of_breakpoints() == 0) {
1577 // Compile the method.
1578 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1579 #ifdef COMPILER1
1580 // Allow repeating compilations for the purpose of benchmarking
1581 // compile speed. This is not useful for customers.
1582 if (CompilationRepeat != 0) {
1583 int compile_count = CompilationRepeat;
1584 while (compile_count > 0) {
1585 invoke_compiler_on_method(task);
1586 nmethod* nm = method->code();
1587 if (nm != NULL) {
1588 nm->make_zombie();
1589 method->clear_code();
1590 }
1591 compile_count--;
1592 }
1593 }
1594 #endif /* COMPILER1 */
1595 invoke_compiler_on_method(task);
1596 } else {
1597 // After compilation is disabled, remove remaining methods from queue
1598 method->clear_queued_for_compilation();
1599 }
1600 }
1601 }
1602 }
1603 }
1606 // ------------------------------------------------------------------
1607 // CompileBroker::init_compiler_thread_log
1608 //
1609 // Set up state required by +LogCompilation.
1610 void CompileBroker::init_compiler_thread_log() {
1611 CompilerThread* thread = CompilerThread::current();
1612 char fileBuf[4*K];
1613 FILE* fp = NULL;
1614 char* file = NULL;
1615 intx thread_id = os::current_thread_id();
1616 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1617 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1618 if (dir == NULL) {
1619 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1620 thread_id, os::current_process_id());
1621 } else {
1622 jio_snprintf(fileBuf, sizeof(fileBuf),
1623 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1624 os::file_separator(), thread_id, os::current_process_id());
1625 }
1626 fp = fopen(fileBuf, "at");
1627 if (fp != NULL) {
1628 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
1629 strcpy(file, fileBuf);
1630 break;
1631 }
1632 }
1633 if (fp == NULL) {
1634 warning("Cannot open log file: %s", fileBuf);
1635 } else {
1636 if (LogCompilation && Verbose)
1637 tty->print_cr("Opening compilation log %s", file);
1638 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
1639 thread->init_log(log);
1641 if (xtty != NULL) {
1642 ttyLocker ttyl;
1644 // Record any per thread log files
1645 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1646 }
1647 }
1648 }
1650 // ------------------------------------------------------------------
1651 // CompileBroker::set_should_block
1652 //
1653 // Set _should_block.
1654 // Call this from the VM, with Threads_lock held and a safepoint requested.
1655 void CompileBroker::set_should_block() {
1656 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1657 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1658 #ifndef PRODUCT
1659 if (PrintCompilation && (Verbose || WizardMode))
1660 tty->print_cr("notifying compiler thread pool to block");
1661 #endif
1662 _should_block = true;
1663 }
1665 // ------------------------------------------------------------------
1666 // CompileBroker::maybe_block
1667 //
1668 // Call this from the compiler at convenient points, to poll for _should_block.
1669 void CompileBroker::maybe_block() {
1670 if (_should_block) {
1671 #ifndef PRODUCT
1672 if (PrintCompilation && (Verbose || WizardMode))
1673 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1674 #endif
1675 ThreadInVMfromNative tivfn(JavaThread::current());
1676 }
1677 }
1680 // ------------------------------------------------------------------
1681 // CompileBroker::invoke_compiler_on_method
1682 //
1683 // Compile a method.
1684 //
1685 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1686 if (PrintCompilation) {
1687 ResourceMark rm;
1688 task->print_line();
1689 }
1690 elapsedTimer time;
1692 CompilerThread* thread = CompilerThread::current();
1693 ResourceMark rm(thread);
1695 if (LogEvents) {
1696 _compilation_log->log_compile(thread, task);
1697 }
1699 // Common flags.
1700 uint compile_id = task->compile_id();
1701 int osr_bci = task->osr_bci();
1702 bool is_osr = (osr_bci != standard_entry_bci);
1703 bool should_log = (thread->log() != NULL);
1704 bool should_break = false;
1705 {
1706 // create the handle inside it's own block so it can't
1707 // accidentally be referenced once the thread transitions to
1708 // native. The NoHandleMark before the transition should catch
1709 // any cases where this occurs in the future.
1710 methodHandle method(thread,
1711 (methodOop)JNIHandles::resolve(task->method_handle()));
1712 should_break = check_break_at(method, compile_id, is_osr);
1713 if (should_log && !CompilerOracle::should_log(method)) {
1714 should_log = false;
1715 }
1716 assert(!method->is_native(), "no longer compile natives");
1718 // Save information about this method in case of failure.
1719 set_last_compile(thread, method, is_osr, task->comp_level());
1721 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1722 }
1724 // Allocate a new set of JNI handles.
1725 push_jni_handle_block();
1726 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
1727 int compilable = ciEnv::MethodCompilable;
1728 {
1729 int system_dictionary_modification_counter;
1730 {
1731 MutexLocker locker(Compile_lock, thread);
1732 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1733 }
1735 NoHandleMark nhm;
1736 ThreadToNativeFromVM ttn(thread);
1738 ciEnv ci_env(task, system_dictionary_modification_counter);
1739 if (should_break) {
1740 ci_env.set_break_at_compile(true);
1741 }
1742 if (should_log) {
1743 ci_env.set_log(thread->log());
1744 }
1745 assert(thread->env() == &ci_env, "set by ci_env");
1746 // The thread-env() field is cleared in ~CompileTaskWrapper.
1748 // Cache Jvmti state
1749 ci_env.cache_jvmti_state();
1751 // Cache DTrace flags
1752 ci_env.cache_dtrace_flags();
1754 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1756 TraceTime t1("compilation", &time);
1758 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1760 if (!ci_env.failing() && task->code() == NULL) {
1761 //assert(false, "compiler should always document failure");
1762 // The compiler elected, without comment, not to register a result.
1763 // Do not attempt further compilations of this method.
1764 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1765 }
1767 // Copy this bit to the enclosing block:
1768 compilable = ci_env.compilable();
1770 if (ci_env.failing()) {
1771 const char* retry_message = ci_env.retry_message();
1772 if (_compilation_log != NULL) {
1773 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1774 }
1775 if (PrintCompilation) {
1776 tty->print("%4d COMPILE SKIPPED: %s", compile_id, ci_env.failure_reason());
1777 if (retry_message != NULL) {
1778 tty->print(" (%s)", retry_message);
1779 }
1780 tty->cr();
1781 }
1782 } else {
1783 task->mark_success();
1784 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1785 if (_compilation_log != NULL) {
1786 nmethod* code = task->code();
1787 if (code != NULL) {
1788 _compilation_log->log_nmethod(thread, code);
1789 }
1790 }
1791 }
1792 }
1793 pop_jni_handle_block();
1795 methodHandle method(thread,
1796 (methodOop)JNIHandles::resolve(task->method_handle()));
1798 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1800 collect_statistics(thread, time, task);
1802 if (PrintCompilation && PrintCompilation2) {
1803 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1804 tty->print("%4d ", compile_id); // print compilation number
1805 tty->print("%s ", (is_osr ? "%" : " "));
1806 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size();
1807 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes());
1808 }
1810 if (compilable == ciEnv::MethodCompilable_never) {
1811 if (is_osr) {
1812 method->set_not_osr_compilable();
1813 } else {
1814 method->set_not_compilable_quietly();
1815 }
1816 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1817 method->set_not_compilable_quietly(task->comp_level());
1818 }
1820 // Note that the queued_for_compilation bits are cleared without
1821 // protection of a mutex. [They were set by the requester thread,
1822 // when adding the task to the complie queue -- at which time the
1823 // compile queue lock was held. Subsequently, we acquired the compile
1824 // queue lock to get this task off the compile queue; thus (to belabour
1825 // the point somewhat) our clearing of the bits must be occurring
1826 // only after the setting of the bits. See also 14012000 above.
1827 method->clear_queued_for_compilation();
1829 #ifdef ASSERT
1830 if (CollectedHeap::fired_fake_oom()) {
1831 // The current compile received a fake OOM during compilation so
1832 // go ahead and exit the VM since the test apparently succeeded
1833 tty->print_cr("*** Shutting down VM after successful fake OOM");
1834 vm_exit(0);
1835 }
1836 #endif
1837 }
1839 // ------------------------------------------------------------------
1840 // CompileBroker::handle_full_code_cache
1841 //
1842 // The CodeCache is full. Print out warning and disable compilation or
1843 // try code cache cleaning so compilation can continue later.
1844 void CompileBroker::handle_full_code_cache() {
1845 UseInterpreter = true;
1846 if (UseCompiler || AlwaysCompileLoopMethods ) {
1847 if (xtty != NULL) {
1848 stringStream s;
1849 // Dump code cache state into a buffer before locking the tty,
1850 // because log_state() will use locks causing lock conflicts.
1851 CodeCache::log_state(&s);
1852 // Lock to prevent tearing
1853 ttyLocker ttyl;
1854 xtty->begin_elem("code_cache_full");
1855 xtty->print(s.as_string());
1856 xtty->stamp();
1857 xtty->end_elem();
1858 }
1859 warning("CodeCache is full. Compiler has been disabled.");
1860 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1861 CodeCache::print_bounds(tty);
1862 #ifndef PRODUCT
1863 if (CompileTheWorld || ExitOnFullCodeCache) {
1864 before_exit(JavaThread::current());
1865 exit_globals(); // will delete tty
1866 vm_direct_exit(CompileTheWorld ? 0 : 1);
1867 }
1868 #endif
1869 if (UseCodeCacheFlushing) {
1870 NMethodSweeper::handle_full_code_cache(true);
1871 } else {
1872 UseCompiler = false;
1873 AlwaysCompileLoopMethods = false;
1874 }
1875 }
1876 }
1878 // ------------------------------------------------------------------
1879 // CompileBroker::set_last_compile
1880 //
1881 // Record this compilation for debugging purposes.
1882 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1883 ResourceMark rm;
1884 char* method_name = method->name()->as_C_string();
1885 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1886 char current_method[CompilerCounters::cmname_buffer_length];
1887 size_t maxLen = CompilerCounters::cmname_buffer_length;
1889 if (UsePerfData) {
1890 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string();
1892 size_t s1len = strlen(class_name);
1893 size_t s2len = strlen(method_name);
1895 // check if we need to truncate the string
1896 if (s1len + s2len + 2 > maxLen) {
1898 // the strategy is to lop off the leading characters of the
1899 // class name and the trailing characters of the method name.
1901 if (s2len + 2 > maxLen) {
1902 // lop of the entire class name string, let snprintf handle
1903 // truncation of the method name.
1904 class_name += s1len; // null string
1905 }
1906 else {
1907 // lop off the extra characters from the front of the class name
1908 class_name += ((s1len + s2len + 2) - maxLen);
1909 }
1910 }
1912 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1913 }
1915 if (CICountOSR && is_osr) {
1916 _last_compile_type = osr_compile;
1917 } else {
1918 _last_compile_type = normal_compile;
1919 }
1920 _last_compile_level = comp_level;
1922 if (UsePerfData) {
1923 CompilerCounters* counters = thread->counters();
1924 counters->set_current_method(current_method);
1925 counters->set_compile_type((jlong)_last_compile_type);
1926 }
1927 }
1930 // ------------------------------------------------------------------
1931 // CompileBroker::push_jni_handle_block
1932 //
1933 // Push on a new block of JNI handles.
1934 void CompileBroker::push_jni_handle_block() {
1935 JavaThread* thread = JavaThread::current();
1937 // Allocate a new block for JNI handles.
1938 // Inlined code from jni_PushLocalFrame()
1939 JNIHandleBlock* java_handles = thread->active_handles();
1940 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1941 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1942 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1943 thread->set_active_handles(compile_handles);
1944 }
1947 // ------------------------------------------------------------------
1948 // CompileBroker::pop_jni_handle_block
1949 //
1950 // Pop off the current block of JNI handles.
1951 void CompileBroker::pop_jni_handle_block() {
1952 JavaThread* thread = JavaThread::current();
1954 // Release our JNI handle block
1955 JNIHandleBlock* compile_handles = thread->active_handles();
1956 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1957 thread->set_active_handles(java_handles);
1958 compile_handles->set_pop_frame_link(NULL);
1959 JNIHandleBlock::release_block(compile_handles, thread); // may block
1960 }
1963 // ------------------------------------------------------------------
1964 // CompileBroker::check_break_at
1965 //
1966 // Should the compilation break at the current compilation.
1967 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
1968 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
1969 return true;
1970 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
1971 return true;
1972 } else {
1973 return (compile_id == CIBreakAt);
1974 }
1975 }
1977 // ------------------------------------------------------------------
1978 // CompileBroker::collect_statistics
1979 //
1980 // Collect statistics about the compilation.
1982 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1983 bool success = task->is_success();
1984 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle()));
1985 uint compile_id = task->compile_id();
1986 bool is_osr = (task->osr_bci() != standard_entry_bci);
1987 nmethod* code = task->code();
1988 CompilerCounters* counters = thread->counters();
1990 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1991 MutexLocker locker(CompileStatistics_lock);
1993 // _perf variables are production performance counters which are
1994 // updated regardless of the setting of the CITime and CITimeEach flags
1995 //
1996 if (!success) {
1997 _total_bailout_count++;
1998 if (UsePerfData) {
1999 _perf_last_failed_method->set_value(counters->current_method());
2000 _perf_last_failed_type->set_value(counters->compile_type());
2001 _perf_total_bailout_count->inc();
2002 }
2003 } else if (code == NULL) {
2004 if (UsePerfData) {
2005 _perf_last_invalidated_method->set_value(counters->current_method());
2006 _perf_last_invalidated_type->set_value(counters->compile_type());
2007 _perf_total_invalidated_count->inc();
2008 }
2009 _total_invalidated_count++;
2010 } else {
2011 // Compilation succeeded
2013 // update compilation ticks - used by the implementation of
2014 // java.lang.management.CompilationMBean
2015 _perf_total_compilation->inc(time.ticks());
2017 if (CITime) {
2018 _t_total_compilation.add(time);
2019 if (is_osr) {
2020 _t_osr_compilation.add(time);
2021 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2022 } else {
2023 _t_standard_compilation.add(time);
2024 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2025 }
2026 }
2028 if (UsePerfData) {
2029 // save the name of the last method compiled
2030 _perf_last_method->set_value(counters->current_method());
2031 _perf_last_compile_type->set_value(counters->compile_type());
2032 _perf_last_compile_size->set_value(method->code_size() +
2033 task->num_inlined_bytecodes());
2034 if (is_osr) {
2035 _perf_osr_compilation->inc(time.ticks());
2036 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2037 } else {
2038 _perf_standard_compilation->inc(time.ticks());
2039 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2040 }
2041 }
2043 if (CITimeEach) {
2044 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2045 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2046 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2047 }
2049 // Collect counts of successful compilations
2050 _sum_nmethod_size += code->total_size();
2051 _sum_nmethod_code_size += code->insts_size();
2052 _total_compile_count++;
2054 if (UsePerfData) {
2055 _perf_sum_nmethod_size->inc( code->total_size());
2056 _perf_sum_nmethod_code_size->inc(code->insts_size());
2057 _perf_total_compile_count->inc();
2058 }
2060 if (is_osr) {
2061 if (UsePerfData) _perf_total_osr_compile_count->inc();
2062 _total_osr_compile_count++;
2063 } else {
2064 if (UsePerfData) _perf_total_standard_compile_count->inc();
2065 _total_standard_compile_count++;
2066 }
2067 }
2068 // set the current method for the thread to null
2069 if (UsePerfData) counters->set_current_method("");
2070 }
2074 void CompileBroker::print_times() {
2075 tty->cr();
2076 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2077 tty->print_cr("------------------------------------------------");
2078 //0000000000111111111122222222223333333333444444444455555555556666666666
2079 //0123456789012345678901234567890123456789012345678901234567890123456789
2080 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2081 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2082 CompileBroker::_t_standard_compilation.seconds(),
2083 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2084 tty->print_cr(" On stack replacement : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count);
2086 if (compiler(CompLevel_simple) != NULL) {
2087 compiler(CompLevel_simple)->print_timers();
2088 }
2089 if (compiler(CompLevel_full_optimization) != NULL) {
2090 compiler(CompLevel_full_optimization)->print_timers();
2091 }
2092 tty->cr();
2093 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2094 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2095 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2096 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2097 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2098 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2099 tty->cr();
2100 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2101 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2102 }
2105 // Debugging output for failure
2106 void CompileBroker::print_last_compile() {
2107 if ( _last_compile_level != CompLevel_none &&
2108 compiler(_last_compile_level) != NULL &&
2109 _last_method_compiled != NULL &&
2110 _last_compile_type != no_compile) {
2111 if (_last_compile_type == osr_compile) {
2112 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2113 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2114 } else {
2115 tty->print_cr("Last parse: %d+++(%d) %s",
2116 _compilation_id, _last_compile_level, _last_method_compiled);
2117 }
2118 }
2119 }
2122 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2123 #ifndef PRODUCT
2124 st->print_cr("Compiler thread printing unimplemented.");
2125 st->cr();
2126 #endif
2127 }