Wed, 08 May 2013 15:08:01 -0700
6934604: enable parts of EliminateAutoBox by default
Summary: Resurrected autobox elimination code and enabled part of it by default.
Reviewed-by: roland, twisti
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(method, comp_name) \
69 { \
70 Symbol* klass_name = (method)->klass_name(); \
71 Symbol* name = (method)->name(); \
72 Symbol* signature = (method)->signature(); \
73 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
74 comp_name, strlen(comp_name), \
75 klass_name->bytes(), klass_name->utf8_length(), \
76 name->bytes(), name->utf8_length(), \
77 signature->bytes(), signature->utf8_length()); \
78 }
80 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
81 { \
82 Symbol* klass_name = (method)->klass_name(); \
83 Symbol* name = (method)->name(); \
84 Symbol* signature = (method)->signature(); \
85 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
86 comp_name, strlen(comp_name), \
87 klass_name->bytes(), klass_name->utf8_length(), \
88 name->bytes(), name->utf8_length(), \
89 signature->bytes(), signature->utf8_length(), (success)); \
90 }
92 #else /* USDT2 */
94 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
95 { \
96 Symbol* klass_name = (method)->klass_name(); \
97 Symbol* name = (method)->name(); \
98 Symbol* signature = (method)->signature(); \
99 HOTSPOT_METHOD_COMPILE_BEGIN( \
100 comp_name, strlen(comp_name), \
101 (char *) klass_name->bytes(), klass_name->utf8_length(), \
102 (char *) name->bytes(), name->utf8_length(), \
103 (char *) signature->bytes(), signature->utf8_length()); \
104 }
106 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
107 { \
108 Symbol* klass_name = (method)->klass_name(); \
109 Symbol* name = (method)->name(); \
110 Symbol* signature = (method)->signature(); \
111 HOTSPOT_METHOD_COMPILE_END( \
112 comp_name, strlen(comp_name), \
113 (char *) klass_name->bytes(), klass_name->utf8_length(), \
114 (char *) name->bytes(), name->utf8_length(), \
115 (char *) signature->bytes(), signature->utf8_length(), (success)); \
116 }
117 #endif /* USDT2 */
119 #else // ndef DTRACE_ENABLED
121 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
122 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
124 #endif // ndef DTRACE_ENABLED
126 bool CompileBroker::_initialized = false;
127 volatile bool CompileBroker::_should_block = false;
128 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
130 // The installed compiler(s)
131 AbstractCompiler* CompileBroker::_compilers[2];
133 // These counters are used for assigning id's to each compilation
134 uint CompileBroker::_compilation_id = 0;
135 uint CompileBroker::_osr_compilation_id = 0;
137 // Debugging information
138 int CompileBroker::_last_compile_type = no_compile;
139 int CompileBroker::_last_compile_level = CompLevel_none;
140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
142 // Performance counters
143 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
158 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
166 // Timers and counters for generating statistics
167 elapsedTimer CompileBroker::_t_total_compilation;
168 elapsedTimer CompileBroker::_t_osr_compilation;
169 elapsedTimer CompileBroker::_t_standard_compilation;
171 int CompileBroker::_total_bailout_count = 0;
172 int CompileBroker::_total_invalidated_count = 0;
173 int CompileBroker::_total_compile_count = 0;
174 int CompileBroker::_total_osr_compile_count = 0;
175 int CompileBroker::_total_standard_compile_count = 0;
177 int CompileBroker::_sum_osr_bytes_compiled = 0;
178 int CompileBroker::_sum_standard_bytes_compiled = 0;
179 int CompileBroker::_sum_nmethod_size = 0;
180 int CompileBroker::_sum_nmethod_code_size = 0;
182 CompileQueue* CompileBroker::_c2_method_queue = NULL;
183 CompileQueue* CompileBroker::_c1_method_queue = NULL;
184 CompileTask* CompileBroker::_task_free_list = NULL;
186 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
189 class CompilationLog : public StringEventLog {
190 public:
191 CompilationLog() : StringEventLog("Compilation events") {
192 }
194 void log_compile(JavaThread* thread, CompileTask* task) {
195 StringLogMessage lm;
196 stringStream sstr = lm.stream();
197 // msg.time_stamp().update_to(tty->time_stamp().ticks());
198 task->print_compilation(&sstr, NULL, true);
199 log(thread, "%s", (const char*)lm);
200 }
202 void log_nmethod(JavaThread* thread, nmethod* nm) {
203 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
204 nm->compile_id(), nm->is_osr_method() ? "%" : "",
205 nm, nm->code_begin(), nm->code_end());
206 }
208 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
209 StringLogMessage lm;
210 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
211 if (retry_message != NULL) {
212 lm.append(" (%s)", retry_message);
213 }
214 lm.print("\n");
215 log(thread, "%s", (const char*)lm);
216 }
217 };
219 static CompilationLog* _compilation_log = NULL;
221 void compileBroker_init() {
222 if (LogEvents) {
223 _compilation_log = new CompilationLog();
224 }
225 }
227 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
228 CompilerThread* thread = CompilerThread::current();
229 thread->set_task(task);
230 CompileLog* log = thread->log();
231 if (log != NULL) task->log_task_start(log);
232 }
234 CompileTaskWrapper::~CompileTaskWrapper() {
235 CompilerThread* thread = CompilerThread::current();
236 CompileTask* task = thread->task();
237 CompileLog* log = thread->log();
238 if (log != NULL) task->log_task_done(log);
239 thread->set_task(NULL);
240 task->set_code_handle(NULL);
241 thread->set_env(NULL);
242 if (task->is_blocking()) {
243 MutexLocker notifier(task->lock(), thread);
244 task->mark_complete();
245 // Notify the waiting thread that the compilation has completed.
246 task->lock()->notify_all();
247 } else {
248 task->mark_complete();
250 // By convention, the compiling thread is responsible for
251 // recycling a non-blocking CompileTask.
252 CompileBroker::free_task(task);
253 }
254 }
257 // ------------------------------------------------------------------
258 // CompileTask::initialize
259 void CompileTask::initialize(int compile_id,
260 methodHandle method,
261 int osr_bci,
262 int comp_level,
263 methodHandle hot_method,
264 int hot_count,
265 const char* comment,
266 bool is_blocking) {
267 assert(!_lock->is_locked(), "bad locking");
269 _compile_id = compile_id;
270 _method = method();
271 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
272 _osr_bci = osr_bci;
273 _is_blocking = is_blocking;
274 _comp_level = comp_level;
275 _num_inlined_bytecodes = 0;
277 _is_complete = false;
278 _is_success = false;
279 _code_handle = NULL;
281 _hot_method = NULL;
282 _hot_method_holder = NULL;
283 _hot_count = hot_count;
284 _time_queued = 0; // tidy
285 _comment = comment;
287 if (LogCompilation) {
288 _time_queued = os::elapsed_counter();
289 if (hot_method.not_null()) {
290 if (hot_method == method) {
291 _hot_method = _method;
292 } else {
293 _hot_method = hot_method();
294 // only add loader or mirror if different from _method_holder
295 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
296 }
297 }
298 }
300 _next = NULL;
301 }
303 // ------------------------------------------------------------------
304 // CompileTask::code/set_code
305 nmethod* CompileTask::code() const {
306 if (_code_handle == NULL) return NULL;
307 return _code_handle->code();
308 }
309 void CompileTask::set_code(nmethod* nm) {
310 if (_code_handle == NULL && nm == NULL) return;
311 guarantee(_code_handle != NULL, "");
312 _code_handle->set_code(nm);
313 if (nm == NULL) _code_handle = NULL; // drop the handle also
314 }
316 // ------------------------------------------------------------------
317 // CompileTask::free
318 void CompileTask::free() {
319 set_code(NULL);
320 assert(!_lock->is_locked(), "Should not be locked when freed");
321 JNIHandles::destroy_global(_method_holder);
322 JNIHandles::destroy_global(_hot_method_holder);
323 }
326 void CompileTask::mark_on_stack() {
327 // Mark these methods as something redefine classes cannot remove.
328 _method->set_on_stack(true);
329 if (_hot_method != NULL) {
330 _hot_method->set_on_stack(true);
331 }
332 }
334 // ------------------------------------------------------------------
335 // CompileTask::print
336 void CompileTask::print() {
337 tty->print("<CompileTask compile_id=%d ", _compile_id);
338 tty->print("method=");
339 _method->print_name(tty);
340 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
341 _osr_bci, bool_to_str(_is_blocking),
342 bool_to_str(_is_complete), bool_to_str(_is_success));
343 }
346 // ------------------------------------------------------------------
347 // CompileTask::print_line_on_error
348 //
349 // This function is called by fatal error handler when the thread
350 // causing troubles is a compiler thread.
351 //
352 // Do not grab any lock, do not allocate memory.
353 //
354 // Otherwise it's the same as CompileTask::print_line()
355 //
356 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
357 // print compiler name
358 st->print("%s:", CompileBroker::compiler_name(comp_level()));
359 print_compilation(st);
360 }
362 // ------------------------------------------------------------------
363 // CompileTask::print_line
364 void CompileTask::print_line() {
365 ttyLocker ttyl; // keep the following output all in one block
366 // print compiler name if requested
367 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
368 print_compilation();
369 }
372 // ------------------------------------------------------------------
373 // CompileTask::print_compilation_impl
374 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
375 bool is_osr_method, int osr_bci, bool is_blocking,
376 const char* msg, bool short_form) {
377 if (!short_form) {
378 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
379 }
380 st->print("%4d ", compile_id); // print compilation number
382 // For unloaded methods the transition to zombie occurs after the
383 // method is cleared so it's impossible to report accurate
384 // information for that case.
385 bool is_synchronized = false;
386 bool has_exception_handler = false;
387 bool is_native = false;
388 if (method != NULL) {
389 is_synchronized = method->is_synchronized();
390 has_exception_handler = method->has_exception_handler();
391 is_native = method->is_native();
392 }
393 // method attributes
394 const char compile_type = is_osr_method ? '%' : ' ';
395 const char sync_char = is_synchronized ? 's' : ' ';
396 const char exception_char = has_exception_handler ? '!' : ' ';
397 const char blocking_char = is_blocking ? 'b' : ' ';
398 const char native_char = is_native ? 'n' : ' ';
400 // print method attributes
401 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
403 if (TieredCompilation) {
404 if (comp_level != -1) st->print("%d ", comp_level);
405 else st->print("- ");
406 }
407 st->print(" "); // more indent
409 if (method == NULL) {
410 st->print("(method)");
411 } else {
412 method->print_short_name(st);
413 if (is_osr_method) {
414 st->print(" @ %d", osr_bci);
415 }
416 if (method->is_native())
417 st->print(" (native)");
418 else
419 st->print(" (%d bytes)", method->code_size());
420 }
422 if (msg != NULL) {
423 st->print(" %s", msg);
424 }
425 if (!short_form) {
426 st->cr();
427 }
428 }
430 // ------------------------------------------------------------------
431 // CompileTask::print_inlining
432 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
433 // 1234567
434 st->print(" "); // print timestamp
435 // 1234
436 st->print(" "); // print compilation number
438 // method attributes
439 if (method->is_loaded()) {
440 const char sync_char = method->is_synchronized() ? 's' : ' ';
441 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
442 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
444 // print method attributes
445 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
446 } else {
447 // %s!bn
448 st->print(" "); // print method attributes
449 }
451 if (TieredCompilation) {
452 st->print(" ");
453 }
454 st->print(" "); // more indent
455 st->print(" "); // initial inlining indent
457 for (int i = 0; i < inline_level; i++) st->print(" ");
459 st->print("@ %d ", bci); // print bci
460 method->print_short_name(st);
461 if (method->is_loaded())
462 st->print(" (%d bytes)", method->code_size());
463 else
464 st->print(" (not loaded)");
466 if (msg != NULL) {
467 st->print(" %s", msg);
468 }
469 st->cr();
470 }
472 // ------------------------------------------------------------------
473 // CompileTask::print_inline_indent
474 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
475 // 1234567
476 st->print(" "); // print timestamp
477 // 1234
478 st->print(" "); // print compilation number
479 // %s!bn
480 st->print(" "); // print method attributes
481 if (TieredCompilation) {
482 st->print(" ");
483 }
484 st->print(" "); // more indent
485 st->print(" "); // initial inlining indent
486 for (int i = 0; i < inline_level; i++) st->print(" ");
487 }
489 // ------------------------------------------------------------------
490 // CompileTask::print_compilation
491 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
492 bool is_osr_method = osr_bci() != InvocationEntryBci;
493 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
494 }
496 // ------------------------------------------------------------------
497 // CompileTask::log_task
498 void CompileTask::log_task(xmlStream* log) {
499 Thread* thread = Thread::current();
500 methodHandle method(thread, this->method());
501 ResourceMark rm(thread);
503 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
504 log->print(" compile_id='%d'", _compile_id);
505 if (_osr_bci != CompileBroker::standard_entry_bci) {
506 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
507 } // else compile_kind='c2c'
508 if (!method.is_null()) log->method(method);
509 if (_osr_bci != CompileBroker::standard_entry_bci) {
510 log->print(" osr_bci='%d'", _osr_bci);
511 }
512 if (_comp_level != CompLevel_highest_tier) {
513 log->print(" level='%d'", _comp_level);
514 }
515 if (_is_blocking) {
516 log->print(" blocking='1'");
517 }
518 log->stamp();
519 }
522 // ------------------------------------------------------------------
523 // CompileTask::log_task_queued
524 void CompileTask::log_task_queued() {
525 Thread* thread = Thread::current();
526 ttyLocker ttyl;
527 ResourceMark rm(thread);
529 xtty->begin_elem("task_queued");
530 log_task(xtty);
531 if (_comment != NULL) {
532 xtty->print(" comment='%s'", _comment);
533 }
534 if (_hot_method != NULL) {
535 methodHandle hot(thread, _hot_method);
536 methodHandle method(thread, _method);
537 if (hot() != method()) {
538 xtty->method(hot);
539 }
540 }
541 if (_hot_count != 0) {
542 xtty->print(" hot_count='%d'", _hot_count);
543 }
544 xtty->end_elem();
545 }
548 // ------------------------------------------------------------------
549 // CompileTask::log_task_start
550 void CompileTask::log_task_start(CompileLog* log) {
551 log->begin_head("task");
552 log_task(log);
553 log->end_head();
554 }
557 // ------------------------------------------------------------------
558 // CompileTask::log_task_done
559 void CompileTask::log_task_done(CompileLog* log) {
560 Thread* thread = Thread::current();
561 methodHandle method(thread, this->method());
562 ResourceMark rm(thread);
564 // <task_done ... stamp='1.234'> </task>
565 nmethod* nm = code();
566 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
567 _is_success, nm == NULL ? 0 : nm->content_size(),
568 method->invocation_count());
569 int bec = method->backedge_count();
570 if (bec != 0) log->print(" backedge_count='%d'", bec);
571 // Note: "_is_complete" is about to be set, but is not.
572 if (_num_inlined_bytecodes != 0) {
573 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
574 }
575 log->stamp();
576 log->end_elem();
577 log->tail("task");
578 log->clear_identities(); // next task will have different CI
579 if (log->unflushed_count() > 2000) {
580 log->flush();
581 }
582 log->mark_file_end();
583 }
587 // ------------------------------------------------------------------
588 // CompileQueue::add
589 //
590 // Add a CompileTask to a CompileQueue
591 void CompileQueue::add(CompileTask* task) {
592 assert(lock()->owned_by_self(), "must own lock");
594 task->set_next(NULL);
595 task->set_prev(NULL);
597 if (_last == NULL) {
598 // The compile queue is empty.
599 assert(_first == NULL, "queue is empty");
600 _first = task;
601 _last = task;
602 } else {
603 // Append the task to the queue.
604 assert(_last->next() == NULL, "not last");
605 _last->set_next(task);
606 task->set_prev(_last);
607 _last = task;
608 }
609 ++_size;
611 // Mark the method as being in the compile queue.
612 task->method()->set_queued_for_compilation();
614 if (CIPrintCompileQueue) {
615 print();
616 }
618 if (LogCompilation && xtty != NULL) {
619 task->log_task_queued();
620 }
622 // Notify CompilerThreads that a task is available.
623 lock()->notify_all();
624 }
626 // ------------------------------------------------------------------
627 // CompileQueue::get
628 //
629 // Get the next CompileTask from a CompileQueue
630 CompileTask* CompileQueue::get() {
631 NMethodSweeper::possibly_sweep();
633 MutexLocker locker(lock());
634 // Wait for an available CompileTask.
635 while (_first == NULL) {
636 // There is no work to be done right now. Wait.
637 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
638 // During the emergency sweeping periods, wake up and sweep occasionally
639 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
640 if (timedout) {
641 MutexUnlocker ul(lock());
642 // When otherwise not busy, run nmethod sweeping
643 NMethodSweeper::possibly_sweep();
644 }
645 } else {
646 // During normal operation no need to wake up on timer
647 lock()->wait();
648 }
649 }
650 CompileTask* task = CompilationPolicy::policy()->select_task(this);
651 remove(task);
652 return task;
653 }
655 void CompileQueue::remove(CompileTask* task)
656 {
657 assert(lock()->owned_by_self(), "must own lock");
658 if (task->prev() != NULL) {
659 task->prev()->set_next(task->next());
660 } else {
661 // max is the first element
662 assert(task == _first, "Sanity");
663 _first = task->next();
664 }
666 if (task->next() != NULL) {
667 task->next()->set_prev(task->prev());
668 } else {
669 // max is the last element
670 assert(task == _last, "Sanity");
671 _last = task->prev();
672 }
673 --_size;
674 }
676 // methods in the compile queue need to be marked as used on the stack
677 // so that they don't get reclaimed by Redefine Classes
678 void CompileQueue::mark_on_stack() {
679 CompileTask* task = _first;
680 while (task != NULL) {
681 task->mark_on_stack();
682 task = task->next();
683 }
684 }
686 // ------------------------------------------------------------------
687 // CompileQueue::print
688 void CompileQueue::print() {
689 tty->print_cr("Contents of %s", name());
690 tty->print_cr("----------------------");
691 CompileTask* task = _first;
692 while (task != NULL) {
693 task->print_line();
694 task = task->next();
695 }
696 tty->print_cr("----------------------");
697 }
699 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
701 _current_method[0] = '\0';
702 _compile_type = CompileBroker::no_compile;
704 if (UsePerfData) {
705 ResourceMark rm;
707 // create the thread instance name space string - don't create an
708 // instance subspace if instance is -1 - keeps the adapterThread
709 // counters from having a ".0" namespace.
710 const char* thread_i = (instance == -1) ? thread_name :
711 PerfDataManager::name_space(thread_name, instance);
714 char* name = PerfDataManager::counter_name(thread_i, "method");
715 _perf_current_method =
716 PerfDataManager::create_string_variable(SUN_CI, name,
717 cmname_buffer_length,
718 _current_method, CHECK);
720 name = PerfDataManager::counter_name(thread_i, "type");
721 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
722 PerfData::U_None,
723 (jlong)_compile_type,
724 CHECK);
726 name = PerfDataManager::counter_name(thread_i, "time");
727 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
728 PerfData::U_Ticks, CHECK);
730 name = PerfDataManager::counter_name(thread_i, "compiles");
731 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
732 PerfData::U_Events, CHECK);
733 }
734 }
736 // ------------------------------------------------------------------
737 // CompileBroker::compilation_init
738 //
739 // Initialize the Compilation object
740 void CompileBroker::compilation_init() {
741 _last_method_compiled[0] = '\0';
743 #ifndef SHARK
744 // Set the interface to the current compiler(s).
745 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
746 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
747 #ifdef COMPILER1
748 if (c1_count > 0) {
749 _compilers[0] = new Compiler();
750 }
751 #endif // COMPILER1
753 #ifdef COMPILER2
754 if (c2_count > 0) {
755 _compilers[1] = new C2Compiler();
756 }
757 #endif // COMPILER2
759 #else // SHARK
760 int c1_count = 0;
761 int c2_count = 1;
763 _compilers[1] = new SharkCompiler();
764 #endif // SHARK
766 // Initialize the CompileTask free list
767 _task_free_list = NULL;
769 // Start the CompilerThreads
770 init_compiler_threads(c1_count, c2_count);
771 // totalTime performance counter is always created as it is required
772 // by the implementation of java.lang.management.CompilationMBean.
773 {
774 EXCEPTION_MARK;
775 _perf_total_compilation =
776 PerfDataManager::create_counter(JAVA_CI, "totalTime",
777 PerfData::U_Ticks, CHECK);
778 }
781 if (UsePerfData) {
783 EXCEPTION_MARK;
785 // create the jvmstat performance counters
786 _perf_osr_compilation =
787 PerfDataManager::create_counter(SUN_CI, "osrTime",
788 PerfData::U_Ticks, CHECK);
790 _perf_standard_compilation =
791 PerfDataManager::create_counter(SUN_CI, "standardTime",
792 PerfData::U_Ticks, CHECK);
794 _perf_total_bailout_count =
795 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
796 PerfData::U_Events, CHECK);
798 _perf_total_invalidated_count =
799 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
800 PerfData::U_Events, CHECK);
802 _perf_total_compile_count =
803 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
804 PerfData::U_Events, CHECK);
805 _perf_total_osr_compile_count =
806 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
807 PerfData::U_Events, CHECK);
809 _perf_total_standard_compile_count =
810 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
811 PerfData::U_Events, CHECK);
813 _perf_sum_osr_bytes_compiled =
814 PerfDataManager::create_counter(SUN_CI, "osrBytes",
815 PerfData::U_Bytes, CHECK);
817 _perf_sum_standard_bytes_compiled =
818 PerfDataManager::create_counter(SUN_CI, "standardBytes",
819 PerfData::U_Bytes, CHECK);
821 _perf_sum_nmethod_size =
822 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
823 PerfData::U_Bytes, CHECK);
825 _perf_sum_nmethod_code_size =
826 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
827 PerfData::U_Bytes, CHECK);
829 _perf_last_method =
830 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
831 CompilerCounters::cmname_buffer_length,
832 "", CHECK);
834 _perf_last_failed_method =
835 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
836 CompilerCounters::cmname_buffer_length,
837 "", CHECK);
839 _perf_last_invalidated_method =
840 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
841 CompilerCounters::cmname_buffer_length,
842 "", CHECK);
844 _perf_last_compile_type =
845 PerfDataManager::create_variable(SUN_CI, "lastType",
846 PerfData::U_None,
847 (jlong)CompileBroker::no_compile,
848 CHECK);
850 _perf_last_compile_size =
851 PerfDataManager::create_variable(SUN_CI, "lastSize",
852 PerfData::U_Bytes,
853 (jlong)CompileBroker::no_compile,
854 CHECK);
857 _perf_last_failed_type =
858 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
859 PerfData::U_None,
860 (jlong)CompileBroker::no_compile,
861 CHECK);
863 _perf_last_invalidated_type =
864 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
865 PerfData::U_None,
866 (jlong)CompileBroker::no_compile,
867 CHECK);
868 }
870 _initialized = true;
871 }
875 // ------------------------------------------------------------------
876 // CompileBroker::make_compiler_thread
877 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
878 CompilerThread* compiler_thread = NULL;
880 Klass* k =
881 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
882 true, CHECK_0);
883 instanceKlassHandle klass (THREAD, k);
884 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
885 Handle string = java_lang_String::create_from_str(name, CHECK_0);
887 // Initialize thread_oop to put it into the system threadGroup
888 Handle thread_group (THREAD, Universe::system_thread_group());
889 JavaValue result(T_VOID);
890 JavaCalls::call_special(&result, thread_oop,
891 klass,
892 vmSymbols::object_initializer_name(),
893 vmSymbols::threadgroup_string_void_signature(),
894 thread_group,
895 string,
896 CHECK_0);
898 {
899 MutexLocker mu(Threads_lock, THREAD);
900 compiler_thread = new CompilerThread(queue, counters);
901 // At this point the new CompilerThread data-races with this startup
902 // thread (which I believe is the primoridal thread and NOT the VM
903 // thread). This means Java bytecodes being executed at startup can
904 // queue compile jobs which will run at whatever default priority the
905 // newly created CompilerThread runs at.
908 // At this point it may be possible that no osthread was created for the
909 // JavaThread due to lack of memory. We would have to throw an exception
910 // in that case. However, since this must work and we do not allow
911 // exceptions anyway, check and abort if this fails.
913 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
914 vm_exit_during_initialization("java.lang.OutOfMemoryError",
915 "unable to create new native thread");
916 }
918 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
920 // Note that this only sets the JavaThread _priority field, which by
921 // definition is limited to Java priorities and not OS priorities.
922 // The os-priority is set in the CompilerThread startup code itself
924 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
926 // Note that we cannot call os::set_priority because it expects Java
927 // priorities and we are *explicitly* using OS priorities so that it's
928 // possible to set the compiler thread priority higher than any Java
929 // thread.
931 int native_prio = CompilerThreadPriority;
932 if (native_prio == -1) {
933 if (UseCriticalCompilerThreadPriority) {
934 native_prio = os::java_to_os_priority[CriticalPriority];
935 } else {
936 native_prio = os::java_to_os_priority[NearMaxPriority];
937 }
938 }
939 os::set_native_priority(compiler_thread, native_prio);
941 java_lang_Thread::set_daemon(thread_oop());
943 compiler_thread->set_threadObj(thread_oop());
944 Threads::add(compiler_thread);
945 Thread::start(compiler_thread);
946 }
948 // Let go of Threads_lock before yielding
949 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
951 return compiler_thread;
952 }
955 // ------------------------------------------------------------------
956 // CompileBroker::init_compiler_threads
957 //
958 // Initialize the compilation queue
959 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
960 EXCEPTION_MARK;
961 #if !defined(ZERO) && !defined(SHARK)
962 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
963 #endif // !ZERO && !SHARK
964 if (c2_compiler_count > 0) {
965 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
966 }
967 if (c1_compiler_count > 0) {
968 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
969 }
971 int compiler_count = c1_compiler_count + c2_compiler_count;
973 _method_threads =
974 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
976 char name_buffer[256];
977 for (int i = 0; i < c2_compiler_count; i++) {
978 // Create a name for our thread.
979 sprintf(name_buffer, "C2 CompilerThread%d", i);
980 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
981 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
982 _method_threads->append(new_thread);
983 }
985 for (int i = c2_compiler_count; i < compiler_count; i++) {
986 // Create a name for our thread.
987 sprintf(name_buffer, "C1 CompilerThread%d", i);
988 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
989 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
990 _method_threads->append(new_thread);
991 }
993 if (UsePerfData) {
994 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
995 compiler_count, CHECK);
996 }
997 }
1000 // Set the methods on the stack as on_stack so that redefine classes doesn't
1001 // reclaim them
1002 void CompileBroker::mark_on_stack() {
1003 if (_c2_method_queue != NULL) {
1004 _c2_method_queue->mark_on_stack();
1005 }
1006 if (_c1_method_queue != NULL) {
1007 _c1_method_queue->mark_on_stack();
1008 }
1009 }
1011 // ------------------------------------------------------------------
1012 // CompileBroker::is_idle
1013 bool CompileBroker::is_idle() {
1014 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
1015 return false;
1016 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
1017 return false;
1018 } else {
1019 int num_threads = _method_threads->length();
1020 for (int i=0; i<num_threads; i++) {
1021 if (_method_threads->at(i)->task() != NULL) {
1022 return false;
1023 }
1024 }
1026 // No pending or active compilations.
1027 return true;
1028 }
1029 }
1032 // ------------------------------------------------------------------
1033 // CompileBroker::compile_method
1034 //
1035 // Request compilation of a method.
1036 void CompileBroker::compile_method_base(methodHandle method,
1037 int osr_bci,
1038 int comp_level,
1039 methodHandle hot_method,
1040 int hot_count,
1041 const char* comment,
1042 Thread* thread) {
1043 // do nothing if compiler thread(s) is not available
1044 if (!_initialized ) {
1045 return;
1046 }
1048 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1049 assert(method->method_holder()->oop_is_instance(),
1050 "sanity check");
1051 assert(!method->method_holder()->is_not_initialized(),
1052 "method holder must be initialized");
1053 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1055 if (CIPrintRequests) {
1056 tty->print("request: ");
1057 method->print_short_name(tty);
1058 if (osr_bci != InvocationEntryBci) {
1059 tty->print(" osr_bci: %d", osr_bci);
1060 }
1061 tty->print(" comment: %s count: %d", comment, hot_count);
1062 if (!hot_method.is_null()) {
1063 tty->print(" hot: ");
1064 if (hot_method() != method()) {
1065 hot_method->print_short_name(tty);
1066 } else {
1067 tty->print("yes");
1068 }
1069 }
1070 tty->cr();
1071 }
1073 // A request has been made for compilation. Before we do any
1074 // real work, check to see if the method has been compiled
1075 // in the meantime with a definitive result.
1076 if (compilation_is_complete(method, osr_bci, comp_level)) {
1077 return;
1078 }
1080 #ifndef PRODUCT
1081 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1082 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1083 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1084 return;
1085 }
1086 }
1087 #endif
1089 // If this method is already in the compile queue, then
1090 // we do not block the current thread.
1091 if (compilation_is_in_queue(method, osr_bci)) {
1092 // We may want to decay our counter a bit here to prevent
1093 // multiple denied requests for compilation. This is an
1094 // open compilation policy issue. Note: The other possibility,
1095 // in the case that this is a blocking compile request, is to have
1096 // all subsequent blocking requesters wait for completion of
1097 // ongoing compiles. Note that in this case we'll need a protocol
1098 // for freeing the associated compile tasks. [Or we could have
1099 // a single static monitor on which all these waiters sleep.]
1100 return;
1101 }
1103 // If the requesting thread is holding the pending list lock
1104 // then we just return. We can't risk blocking while holding
1105 // the pending list lock or a 3-way deadlock may occur
1106 // between the reference handler thread, a GC (instigated
1107 // by a compiler thread), and compiled method registration.
1108 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1109 return;
1110 }
1112 // Outputs from the following MutexLocker block:
1113 CompileTask* task = NULL;
1114 bool blocking = false;
1115 CompileQueue* queue = compile_queue(comp_level);
1117 // Acquire our lock.
1118 {
1119 MutexLocker locker(queue->lock(), thread);
1121 // Make sure the method has not slipped into the queues since
1122 // last we checked; note that those checks were "fast bail-outs".
1123 // Here we need to be more careful, see 14012000 below.
1124 if (compilation_is_in_queue(method, osr_bci)) {
1125 return;
1126 }
1128 // We need to check again to see if the compilation has
1129 // completed. A previous compilation may have registered
1130 // some result.
1131 if (compilation_is_complete(method, osr_bci, comp_level)) {
1132 return;
1133 }
1135 // We now know that this compilation is not pending, complete,
1136 // or prohibited. Assign a compile_id to this compilation
1137 // and check to see if it is in our [Start..Stop) range.
1138 uint compile_id = assign_compile_id(method, osr_bci);
1139 if (compile_id == 0) {
1140 // The compilation falls outside the allowed range.
1141 return;
1142 }
1144 // Should this thread wait for completion of the compile?
1145 blocking = is_compile_blocking(method, osr_bci);
1147 // We will enter the compilation in the queue.
1148 // 14012000: Note that this sets the queued_for_compile bits in
1149 // the target method. We can now reason that a method cannot be
1150 // queued for compilation more than once, as follows:
1151 // Before a thread queues a task for compilation, it first acquires
1152 // the compile queue lock, then checks if the method's queued bits
1153 // are set or it has already been compiled. Thus there can not be two
1154 // instances of a compilation task for the same method on the
1155 // compilation queue. Consider now the case where the compilation
1156 // thread has already removed a task for that method from the queue
1157 // and is in the midst of compiling it. In this case, the
1158 // queued_for_compile bits must be set in the method (and these
1159 // will be visible to the current thread, since the bits were set
1160 // under protection of the compile queue lock, which we hold now.
1161 // When the compilation completes, the compiler thread first sets
1162 // the compilation result and then clears the queued_for_compile
1163 // bits. Neither of these actions are protected by a barrier (or done
1164 // under the protection of a lock), so the only guarantee we have
1165 // (on machines with TSO (Total Store Order)) is that these values
1166 // will update in that order. As a result, the only combinations of
1167 // these bits that the current thread will see are, in temporal order:
1168 // <RESULT, QUEUE> :
1169 // <0, 1> : in compile queue, but not yet compiled
1170 // <1, 1> : compiled but queue bit not cleared
1171 // <1, 0> : compiled and queue bit cleared
1172 // Because we first check the queue bits then check the result bits,
1173 // we are assured that we cannot introduce a duplicate task.
1174 // Note that if we did the tests in the reverse order (i.e. check
1175 // result then check queued bit), we could get the result bit before
1176 // the compilation completed, and the queue bit after the compilation
1177 // completed, and end up introducing a "duplicate" (redundant) task.
1178 // In that case, the compiler thread should first check if a method
1179 // has already been compiled before trying to compile it.
1180 // NOTE: in the event that there are multiple compiler threads and
1181 // there is de-optimization/recompilation, things will get hairy,
1182 // and in that case it's best to protect both the testing (here) of
1183 // these bits, and their updating (here and elsewhere) under a
1184 // common lock.
1185 task = create_compile_task(queue,
1186 compile_id, method,
1187 osr_bci, comp_level,
1188 hot_method, hot_count, comment,
1189 blocking);
1190 }
1192 if (blocking) {
1193 wait_for_completion(task);
1194 }
1195 }
1198 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1199 int comp_level,
1200 methodHandle hot_method, int hot_count,
1201 const char* comment, Thread* THREAD) {
1202 // make sure arguments make sense
1203 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1204 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1205 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1206 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1207 // allow any levels for WhiteBox
1208 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1209 // return quickly if possible
1211 // lock, make sure that the compilation
1212 // isn't prohibited in a straightforward way.
1213 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1214 if (comp == NULL || !comp->can_compile_method(method) ||
1215 compilation_is_prohibited(method, osr_bci, comp_level)) {
1216 return NULL;
1217 }
1219 if (osr_bci == InvocationEntryBci) {
1220 // standard compilation
1221 nmethod* method_code = method->code();
1222 if (method_code != NULL) {
1223 if (compilation_is_complete(method, osr_bci, comp_level)) {
1224 return method_code;
1225 }
1226 }
1227 if (method->is_not_compilable(comp_level)) return NULL;
1229 if (UseCodeCacheFlushing) {
1230 nmethod* saved = CodeCache::reanimate_saved_code(method());
1231 if (saved != NULL) {
1232 method->set_code(method, saved);
1233 return saved;
1234 }
1235 }
1237 } else {
1238 // osr compilation
1239 #ifndef TIERED
1240 // seems like an assert of dubious value
1241 assert(comp_level == CompLevel_highest_tier,
1242 "all OSR compiles are assumed to be at a single compilation lavel");
1243 #endif // TIERED
1244 // We accept a higher level osr method
1245 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1246 if (nm != NULL) return nm;
1247 if (method->is_not_osr_compilable(comp_level)) return NULL;
1248 }
1250 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1251 // some prerequisites that are compiler specific
1252 if (comp->is_c2() || comp->is_shark()) {
1253 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1254 // Resolve all classes seen in the signature of the method
1255 // we are compiling.
1256 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1257 }
1259 // If the method is native, do the lookup in the thread requesting
1260 // the compilation. Native lookups can load code, which is not
1261 // permitted during compilation.
1262 //
1263 // Note: A native method implies non-osr compilation which is
1264 // checked with an assertion at the entry of this method.
1265 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1266 bool in_base_library;
1267 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1268 if (HAS_PENDING_EXCEPTION) {
1269 // In case of an exception looking up the method, we just forget
1270 // about it. The interpreter will kick-in and throw the exception.
1271 method->set_not_compilable(); // implies is_not_osr_compilable()
1272 CLEAR_PENDING_EXCEPTION;
1273 return NULL;
1274 }
1275 assert(method->has_native_function(), "must have native code by now");
1276 }
1278 // RedefineClasses() has replaced this method; just return
1279 if (method->is_old()) {
1280 return NULL;
1281 }
1283 // JVMTI -- post_compile_event requires jmethod_id() that may require
1284 // a lock the compiling thread can not acquire. Prefetch it here.
1285 if (JvmtiExport::should_post_compiled_method_load()) {
1286 method->jmethod_id();
1287 }
1289 // If the compiler is shut off due to code cache getting full
1290 // fail out now so blocking compiles dont hang the java thread
1291 if (!should_compile_new_jobs()) {
1292 CompilationPolicy::policy()->delay_compilation(method());
1293 return NULL;
1294 }
1296 // do the compilation
1297 if (method->is_native()) {
1298 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1299 // Acquire our lock.
1300 int compile_id;
1301 {
1302 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1303 compile_id = assign_compile_id(method, standard_entry_bci);
1304 }
1305 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1306 } else {
1307 return NULL;
1308 }
1309 } else {
1310 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1311 }
1313 // return requested nmethod
1314 // We accept a higher level osr method
1315 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1316 }
1319 // ------------------------------------------------------------------
1320 // CompileBroker::compilation_is_complete
1321 //
1322 // See if compilation of this method is already complete.
1323 bool CompileBroker::compilation_is_complete(methodHandle method,
1324 int osr_bci,
1325 int comp_level) {
1326 bool is_osr = (osr_bci != standard_entry_bci);
1327 if (is_osr) {
1328 if (method->is_not_osr_compilable(comp_level)) {
1329 return true;
1330 } else {
1331 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1332 return (result != NULL);
1333 }
1334 } else {
1335 if (method->is_not_compilable(comp_level)) {
1336 return true;
1337 } else {
1338 nmethod* result = method->code();
1339 if (result == NULL) return false;
1340 return comp_level == result->comp_level();
1341 }
1342 }
1343 }
1346 // ------------------------------------------------------------------
1347 // CompileBroker::compilation_is_in_queue
1348 //
1349 // See if this compilation is already requested.
1350 //
1351 // Implementation note: there is only a single "is in queue" bit
1352 // for each method. This means that the check below is overly
1353 // conservative in the sense that an osr compilation in the queue
1354 // will block a normal compilation from entering the queue (and vice
1355 // versa). This can be remedied by a full queue search to disambiguate
1356 // cases. If it is deemed profitible, this may be done.
1357 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1358 int osr_bci) {
1359 return method->queued_for_compilation();
1360 }
1362 // ------------------------------------------------------------------
1363 // CompileBroker::compilation_is_prohibited
1364 //
1365 // See if this compilation is not allowed.
1366 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1367 bool is_native = method->is_native();
1368 // Some compilers may not support the compilation of natives.
1369 AbstractCompiler *comp = compiler(comp_level);
1370 if (is_native &&
1371 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1372 method->set_not_compilable_quietly(comp_level);
1373 return true;
1374 }
1376 bool is_osr = (osr_bci != standard_entry_bci);
1377 // Some compilers may not support on stack replacement.
1378 if (is_osr &&
1379 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1380 method->set_not_osr_compilable(comp_level);
1381 return true;
1382 }
1384 // The method may be explicitly excluded by the user.
1385 bool quietly;
1386 if (CompilerOracle::should_exclude(method, quietly)) {
1387 if (!quietly) {
1388 // This does not happen quietly...
1389 ResourceMark rm;
1390 tty->print("### Excluding %s:%s",
1391 method->is_native() ? "generation of native wrapper" : "compile",
1392 (method->is_static() ? " static" : ""));
1393 method->print_short_name(tty);
1394 tty->cr();
1395 }
1396 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1397 }
1399 return false;
1400 }
1403 // ------------------------------------------------------------------
1404 // CompileBroker::assign_compile_id
1405 //
1406 // Assign a serialized id number to this compilation request. If the
1407 // number falls out of the allowed range, return a 0. OSR
1408 // compilations may be numbered separately from regular compilations
1409 // if certain debugging flags are used.
1410 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1411 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1412 "must hold the compilation queue lock");
1413 bool is_osr = (osr_bci != standard_entry_bci);
1414 uint id;
1415 if (CICountOSR && is_osr) {
1416 id = ++_osr_compilation_id;
1417 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1418 return id;
1419 }
1420 } else {
1421 id = ++_compilation_id;
1422 if ((uint)CIStart <= id && id < (uint)CIStop) {
1423 return id;
1424 }
1425 }
1427 // Method was not in the appropriate compilation range.
1428 method->set_not_compilable_quietly();
1429 return 0;
1430 }
1433 // ------------------------------------------------------------------
1434 // CompileBroker::is_compile_blocking
1435 //
1436 // Should the current thread be blocked until this compilation request
1437 // has been fulfilled?
1438 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1439 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1440 return !BackgroundCompilation;
1441 }
1444 // ------------------------------------------------------------------
1445 // CompileBroker::preload_classes
1446 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1447 // Move this code over from c1_Compiler.cpp
1448 ShouldNotReachHere();
1449 }
1452 // ------------------------------------------------------------------
1453 // CompileBroker::create_compile_task
1454 //
1455 // Create a CompileTask object representing the current request for
1456 // compilation. Add this task to the queue.
1457 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1458 int compile_id,
1459 methodHandle method,
1460 int osr_bci,
1461 int comp_level,
1462 methodHandle hot_method,
1463 int hot_count,
1464 const char* comment,
1465 bool blocking) {
1466 CompileTask* new_task = allocate_task();
1467 new_task->initialize(compile_id, method, osr_bci, comp_level,
1468 hot_method, hot_count, comment,
1469 blocking);
1470 queue->add(new_task);
1471 return new_task;
1472 }
1475 // ------------------------------------------------------------------
1476 // CompileBroker::allocate_task
1477 //
1478 // Allocate a CompileTask, from the free list if possible.
1479 CompileTask* CompileBroker::allocate_task() {
1480 MutexLocker locker(CompileTaskAlloc_lock);
1481 CompileTask* task = NULL;
1482 if (_task_free_list != NULL) {
1483 task = _task_free_list;
1484 _task_free_list = task->next();
1485 task->set_next(NULL);
1486 } else {
1487 task = new CompileTask();
1488 task->set_next(NULL);
1489 }
1490 return task;
1491 }
1494 // ------------------------------------------------------------------
1495 // CompileBroker::free_task
1496 //
1497 // Add a task to the free list.
1498 void CompileBroker::free_task(CompileTask* task) {
1499 MutexLocker locker(CompileTaskAlloc_lock);
1500 task->free();
1501 task->set_next(_task_free_list);
1502 _task_free_list = task;
1503 }
1506 // ------------------------------------------------------------------
1507 // CompileBroker::wait_for_completion
1508 //
1509 // Wait for the given method CompileTask to complete.
1510 void CompileBroker::wait_for_completion(CompileTask* task) {
1511 if (CIPrintCompileQueue) {
1512 tty->print_cr("BLOCKING FOR COMPILE");
1513 }
1515 assert(task->is_blocking(), "can only wait on blocking task");
1517 JavaThread *thread = JavaThread::current();
1518 thread->set_blocked_on_compilation(true);
1520 methodHandle method(thread, task->method());
1521 {
1522 MutexLocker waiter(task->lock(), thread);
1524 while (!task->is_complete())
1525 task->lock()->wait();
1526 }
1527 // It is harmless to check this status without the lock, because
1528 // completion is a stable property (until the task object is recycled).
1529 assert(task->is_complete(), "Compilation should have completed");
1530 assert(task->code_handle() == NULL, "must be reset");
1532 thread->set_blocked_on_compilation(false);
1534 // By convention, the waiter is responsible for recycling a
1535 // blocking CompileTask. Since there is only one waiter ever
1536 // waiting on a CompileTask, we know that no one else will
1537 // be using this CompileTask; we can free it.
1538 free_task(task);
1539 }
1541 // ------------------------------------------------------------------
1542 // CompileBroker::compiler_thread_loop
1543 //
1544 // The main loop run by a CompilerThread.
1545 void CompileBroker::compiler_thread_loop() {
1546 CompilerThread* thread = CompilerThread::current();
1547 CompileQueue* queue = thread->queue();
1549 // For the thread that initializes the ciObjectFactory
1550 // this resource mark holds all the shared objects
1551 ResourceMark rm;
1553 // First thread to get here will initialize the compiler interface
1555 if (!ciObjectFactory::is_initialized()) {
1556 ASSERT_IN_VM;
1557 MutexLocker only_one (CompileThread_lock, thread);
1558 if (!ciObjectFactory::is_initialized()) {
1559 ciObjectFactory::initialize();
1560 }
1561 }
1563 // Open a log.
1564 if (LogCompilation) {
1565 init_compiler_thread_log();
1566 }
1567 CompileLog* log = thread->log();
1568 if (log != NULL) {
1569 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1570 thread->name(),
1571 os::current_thread_id(),
1572 os::current_process_id());
1573 log->stamp();
1574 log->end_elem();
1575 }
1577 while (true) {
1578 {
1579 // We need this HandleMark to avoid leaking VM handles.
1580 HandleMark hm(thread);
1582 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1583 // the code cache is really full
1584 handle_full_code_cache();
1585 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1586 // Attempt to start cleaning the code cache while there is still a little headroom
1587 NMethodSweeper::handle_full_code_cache(false);
1588 }
1590 CompileTask* task = queue->get();
1592 // Give compiler threads an extra quanta. They tend to be bursty and
1593 // this helps the compiler to finish up the job.
1594 if( CompilerThreadHintNoPreempt )
1595 os::hint_no_preempt();
1597 // trace per thread time and compile statistics
1598 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1599 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1601 // Assign the task to the current thread. Mark this compilation
1602 // thread as active for the profiler.
1603 CompileTaskWrapper ctw(task);
1604 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1605 task->set_code_handle(&result_handle);
1606 methodHandle method(thread, task->method());
1608 // Never compile a method if breakpoints are present in it
1609 if (method()->number_of_breakpoints() == 0) {
1610 // Compile the method.
1611 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1612 #ifdef COMPILER1
1613 // Allow repeating compilations for the purpose of benchmarking
1614 // compile speed. This is not useful for customers.
1615 if (CompilationRepeat != 0) {
1616 int compile_count = CompilationRepeat;
1617 while (compile_count > 0) {
1618 invoke_compiler_on_method(task);
1619 nmethod* nm = method->code();
1620 if (nm != NULL) {
1621 nm->make_zombie();
1622 method->clear_code();
1623 }
1624 compile_count--;
1625 }
1626 }
1627 #endif /* COMPILER1 */
1628 invoke_compiler_on_method(task);
1629 } else {
1630 // After compilation is disabled, remove remaining methods from queue
1631 method->clear_queued_for_compilation();
1632 }
1633 }
1634 }
1635 }
1636 }
1639 // ------------------------------------------------------------------
1640 // CompileBroker::init_compiler_thread_log
1641 //
1642 // Set up state required by +LogCompilation.
1643 void CompileBroker::init_compiler_thread_log() {
1644 CompilerThread* thread = CompilerThread::current();
1645 char fileBuf[4*K];
1646 FILE* fp = NULL;
1647 char* file = NULL;
1648 intx thread_id = os::current_thread_id();
1649 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1650 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1651 if (dir == NULL) {
1652 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1653 thread_id, os::current_process_id());
1654 } else {
1655 jio_snprintf(fileBuf, sizeof(fileBuf),
1656 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1657 os::file_separator(), thread_id, os::current_process_id());
1658 }
1659 fp = fopen(fileBuf, "at");
1660 if (fp != NULL) {
1661 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler);
1662 strcpy(file, fileBuf);
1663 break;
1664 }
1665 }
1666 if (fp == NULL) {
1667 warning("Cannot open log file: %s", fileBuf);
1668 } else {
1669 if (LogCompilation && Verbose)
1670 tty->print_cr("Opening compilation log %s", file);
1671 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id);
1672 thread->init_log(log);
1674 if (xtty != NULL) {
1675 ttyLocker ttyl;
1677 // Record any per thread log files
1678 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1679 }
1680 }
1681 }
1683 // ------------------------------------------------------------------
1684 // CompileBroker::set_should_block
1685 //
1686 // Set _should_block.
1687 // Call this from the VM, with Threads_lock held and a safepoint requested.
1688 void CompileBroker::set_should_block() {
1689 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1690 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1691 #ifndef PRODUCT
1692 if (PrintCompilation && (Verbose || WizardMode))
1693 tty->print_cr("notifying compiler thread pool to block");
1694 #endif
1695 _should_block = true;
1696 }
1698 // ------------------------------------------------------------------
1699 // CompileBroker::maybe_block
1700 //
1701 // Call this from the compiler at convenient points, to poll for _should_block.
1702 void CompileBroker::maybe_block() {
1703 if (_should_block) {
1704 #ifndef PRODUCT
1705 if (PrintCompilation && (Verbose || WizardMode))
1706 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1707 #endif
1708 ThreadInVMfromNative tivfn(JavaThread::current());
1709 }
1710 }
1712 // wrapper for CodeCache::print_summary()
1713 static void codecache_print(bool detailed)
1714 {
1715 ResourceMark rm;
1716 stringStream s;
1717 // Dump code cache into a buffer before locking the tty,
1718 {
1719 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1720 CodeCache::print_summary(&s, detailed);
1721 }
1722 ttyLocker ttyl;
1723 tty->print_cr(s.as_string());
1724 }
1726 // ------------------------------------------------------------------
1727 // CompileBroker::invoke_compiler_on_method
1728 //
1729 // Compile a method.
1730 //
1731 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1732 if (PrintCompilation) {
1733 ResourceMark rm;
1734 task->print_line();
1735 }
1736 elapsedTimer time;
1738 CompilerThread* thread = CompilerThread::current();
1739 ResourceMark rm(thread);
1741 if (LogEvents) {
1742 _compilation_log->log_compile(thread, task);
1743 }
1745 // Common flags.
1746 uint compile_id = task->compile_id();
1747 int osr_bci = task->osr_bci();
1748 bool is_osr = (osr_bci != standard_entry_bci);
1749 bool should_log = (thread->log() != NULL);
1750 bool should_break = false;
1751 int task_level = task->comp_level();
1752 {
1753 // create the handle inside it's own block so it can't
1754 // accidentally be referenced once the thread transitions to
1755 // native. The NoHandleMark before the transition should catch
1756 // any cases where this occurs in the future.
1757 methodHandle method(thread, task->method());
1758 should_break = check_break_at(method, compile_id, is_osr);
1759 if (should_log && !CompilerOracle::should_log(method)) {
1760 should_log = false;
1761 }
1762 assert(!method->is_native(), "no longer compile natives");
1764 // Save information about this method in case of failure.
1765 set_last_compile(thread, method, is_osr, task_level);
1767 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1768 }
1770 // Allocate a new set of JNI handles.
1771 push_jni_handle_block();
1772 Method* target_handle = task->method();
1773 int compilable = ciEnv::MethodCompilable;
1774 {
1775 int system_dictionary_modification_counter;
1776 {
1777 MutexLocker locker(Compile_lock, thread);
1778 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1779 }
1781 NoHandleMark nhm;
1782 ThreadToNativeFromVM ttn(thread);
1784 ciEnv ci_env(task, system_dictionary_modification_counter);
1785 if (should_break) {
1786 ci_env.set_break_at_compile(true);
1787 }
1788 if (should_log) {
1789 ci_env.set_log(thread->log());
1790 }
1791 assert(thread->env() == &ci_env, "set by ci_env");
1792 // The thread-env() field is cleared in ~CompileTaskWrapper.
1794 // Cache Jvmti state
1795 ci_env.cache_jvmti_state();
1797 // Cache DTrace flags
1798 ci_env.cache_dtrace_flags();
1800 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1802 TraceTime t1("compilation", &time);
1804 AbstractCompiler *comp = compiler(task_level);
1805 if (comp == NULL) {
1806 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1807 } else {
1808 comp->compile_method(&ci_env, target, osr_bci);
1809 }
1811 if (!ci_env.failing() && task->code() == NULL) {
1812 //assert(false, "compiler should always document failure");
1813 // The compiler elected, without comment, not to register a result.
1814 // Do not attempt further compilations of this method.
1815 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1816 }
1818 // Copy this bit to the enclosing block:
1819 compilable = ci_env.compilable();
1821 if (ci_env.failing()) {
1822 const char* retry_message = ci_env.retry_message();
1823 if (_compilation_log != NULL) {
1824 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1825 }
1826 if (PrintCompilation) {
1827 FormatBufferResource msg = retry_message != NULL ?
1828 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1829 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1830 task->print_compilation(tty, msg);
1831 }
1832 } else {
1833 task->mark_success();
1834 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1835 if (_compilation_log != NULL) {
1836 nmethod* code = task->code();
1837 if (code != NULL) {
1838 _compilation_log->log_nmethod(thread, code);
1839 }
1840 }
1841 }
1842 // simulate crash during compilation
1843 assert(task->compile_id() != CICrashAt, "just as planned");
1844 }
1845 pop_jni_handle_block();
1847 methodHandle method(thread, task->method());
1849 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1851 collect_statistics(thread, time, task);
1853 if (PrintCompilation && PrintCompilation2) {
1854 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1855 tty->print("%4d ", compile_id); // print compilation number
1856 tty->print("%s ", (is_osr ? "%" : " "));
1857 if (task->code() != NULL) {
1858 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1859 }
1860 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1861 }
1863 if (PrintCodeCacheOnCompilation)
1864 codecache_print(/* detailed= */ false);
1866 // Disable compilation, if required.
1867 switch (compilable) {
1868 case ciEnv::MethodCompilable_never:
1869 if (is_osr)
1870 method->set_not_osr_compilable_quietly();
1871 else
1872 method->set_not_compilable_quietly();
1873 break;
1874 case ciEnv::MethodCompilable_not_at_tier:
1875 if (is_osr)
1876 method->set_not_osr_compilable_quietly(task_level);
1877 else
1878 method->set_not_compilable_quietly(task_level);
1879 break;
1880 }
1882 // Note that the queued_for_compilation bits are cleared without
1883 // protection of a mutex. [They were set by the requester thread,
1884 // when adding the task to the complie queue -- at which time the
1885 // compile queue lock was held. Subsequently, we acquired the compile
1886 // queue lock to get this task off the compile queue; thus (to belabour
1887 // the point somewhat) our clearing of the bits must be occurring
1888 // only after the setting of the bits. See also 14012000 above.
1889 method->clear_queued_for_compilation();
1891 #ifdef ASSERT
1892 if (CollectedHeap::fired_fake_oom()) {
1893 // The current compile received a fake OOM during compilation so
1894 // go ahead and exit the VM since the test apparently succeeded
1895 tty->print_cr("*** Shutting down VM after successful fake OOM");
1896 vm_exit(0);
1897 }
1898 #endif
1899 }
1901 // ------------------------------------------------------------------
1902 // CompileBroker::handle_full_code_cache
1903 //
1904 // The CodeCache is full. Print out warning and disable compilation or
1905 // try code cache cleaning so compilation can continue later.
1906 void CompileBroker::handle_full_code_cache() {
1907 UseInterpreter = true;
1908 if (UseCompiler || AlwaysCompileLoopMethods ) {
1909 if (xtty != NULL) {
1910 ResourceMark rm;
1911 stringStream s;
1912 // Dump code cache state into a buffer before locking the tty,
1913 // because log_state() will use locks causing lock conflicts.
1914 CodeCache::log_state(&s);
1915 // Lock to prevent tearing
1916 ttyLocker ttyl;
1917 xtty->begin_elem("code_cache_full");
1918 xtty->print(s.as_string());
1919 xtty->stamp();
1920 xtty->end_elem();
1921 }
1922 warning("CodeCache is full. Compiler has been disabled.");
1923 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1924 #ifndef PRODUCT
1925 if (CompileTheWorld || ExitOnFullCodeCache) {
1926 codecache_print(/* detailed= */ true);
1927 before_exit(JavaThread::current());
1928 exit_globals(); // will delete tty
1929 vm_direct_exit(CompileTheWorld ? 0 : 1);
1930 }
1931 #endif
1932 if (UseCodeCacheFlushing) {
1933 NMethodSweeper::handle_full_code_cache(true);
1934 } else {
1935 UseCompiler = false;
1936 AlwaysCompileLoopMethods = false;
1937 }
1938 }
1939 codecache_print(/* detailed= */ true);
1940 }
1942 // ------------------------------------------------------------------
1943 // CompileBroker::set_last_compile
1944 //
1945 // Record this compilation for debugging purposes.
1946 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1947 ResourceMark rm;
1948 char* method_name = method->name()->as_C_string();
1949 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1950 char current_method[CompilerCounters::cmname_buffer_length];
1951 size_t maxLen = CompilerCounters::cmname_buffer_length;
1953 if (UsePerfData) {
1954 const char* class_name = method->method_holder()->name()->as_C_string();
1956 size_t s1len = strlen(class_name);
1957 size_t s2len = strlen(method_name);
1959 // check if we need to truncate the string
1960 if (s1len + s2len + 2 > maxLen) {
1962 // the strategy is to lop off the leading characters of the
1963 // class name and the trailing characters of the method name.
1965 if (s2len + 2 > maxLen) {
1966 // lop of the entire class name string, let snprintf handle
1967 // truncation of the method name.
1968 class_name += s1len; // null string
1969 }
1970 else {
1971 // lop off the extra characters from the front of the class name
1972 class_name += ((s1len + s2len + 2) - maxLen);
1973 }
1974 }
1976 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1977 }
1979 if (CICountOSR && is_osr) {
1980 _last_compile_type = osr_compile;
1981 } else {
1982 _last_compile_type = normal_compile;
1983 }
1984 _last_compile_level = comp_level;
1986 if (UsePerfData) {
1987 CompilerCounters* counters = thread->counters();
1988 counters->set_current_method(current_method);
1989 counters->set_compile_type((jlong)_last_compile_type);
1990 }
1991 }
1994 // ------------------------------------------------------------------
1995 // CompileBroker::push_jni_handle_block
1996 //
1997 // Push on a new block of JNI handles.
1998 void CompileBroker::push_jni_handle_block() {
1999 JavaThread* thread = JavaThread::current();
2001 // Allocate a new block for JNI handles.
2002 // Inlined code from jni_PushLocalFrame()
2003 JNIHandleBlock* java_handles = thread->active_handles();
2004 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2005 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2006 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2007 thread->set_active_handles(compile_handles);
2008 }
2011 // ------------------------------------------------------------------
2012 // CompileBroker::pop_jni_handle_block
2013 //
2014 // Pop off the current block of JNI handles.
2015 void CompileBroker::pop_jni_handle_block() {
2016 JavaThread* thread = JavaThread::current();
2018 // Release our JNI handle block
2019 JNIHandleBlock* compile_handles = thread->active_handles();
2020 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2021 thread->set_active_handles(java_handles);
2022 compile_handles->set_pop_frame_link(NULL);
2023 JNIHandleBlock::release_block(compile_handles, thread); // may block
2024 }
2027 // ------------------------------------------------------------------
2028 // CompileBroker::check_break_at
2029 //
2030 // Should the compilation break at the current compilation.
2031 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2032 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2033 return true;
2034 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2035 return true;
2036 } else {
2037 return (compile_id == CIBreakAt);
2038 }
2039 }
2041 // ------------------------------------------------------------------
2042 // CompileBroker::collect_statistics
2043 //
2044 // Collect statistics about the compilation.
2046 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2047 bool success = task->is_success();
2048 methodHandle method (thread, task->method());
2049 uint compile_id = task->compile_id();
2050 bool is_osr = (task->osr_bci() != standard_entry_bci);
2051 nmethod* code = task->code();
2052 CompilerCounters* counters = thread->counters();
2054 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2055 MutexLocker locker(CompileStatistics_lock);
2057 // _perf variables are production performance counters which are
2058 // updated regardless of the setting of the CITime and CITimeEach flags
2059 //
2060 if (!success) {
2061 _total_bailout_count++;
2062 if (UsePerfData) {
2063 _perf_last_failed_method->set_value(counters->current_method());
2064 _perf_last_failed_type->set_value(counters->compile_type());
2065 _perf_total_bailout_count->inc();
2066 }
2067 } else if (code == NULL) {
2068 if (UsePerfData) {
2069 _perf_last_invalidated_method->set_value(counters->current_method());
2070 _perf_last_invalidated_type->set_value(counters->compile_type());
2071 _perf_total_invalidated_count->inc();
2072 }
2073 _total_invalidated_count++;
2074 } else {
2075 // Compilation succeeded
2077 // update compilation ticks - used by the implementation of
2078 // java.lang.management.CompilationMBean
2079 _perf_total_compilation->inc(time.ticks());
2081 if (CITime) {
2082 _t_total_compilation.add(time);
2083 if (is_osr) {
2084 _t_osr_compilation.add(time);
2085 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2086 } else {
2087 _t_standard_compilation.add(time);
2088 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2089 }
2090 }
2092 if (UsePerfData) {
2093 // save the name of the last method compiled
2094 _perf_last_method->set_value(counters->current_method());
2095 _perf_last_compile_type->set_value(counters->compile_type());
2096 _perf_last_compile_size->set_value(method->code_size() +
2097 task->num_inlined_bytecodes());
2098 if (is_osr) {
2099 _perf_osr_compilation->inc(time.ticks());
2100 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2101 } else {
2102 _perf_standard_compilation->inc(time.ticks());
2103 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2104 }
2105 }
2107 if (CITimeEach) {
2108 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2109 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2110 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2111 }
2113 // Collect counts of successful compilations
2114 _sum_nmethod_size += code->total_size();
2115 _sum_nmethod_code_size += code->insts_size();
2116 _total_compile_count++;
2118 if (UsePerfData) {
2119 _perf_sum_nmethod_size->inc( code->total_size());
2120 _perf_sum_nmethod_code_size->inc(code->insts_size());
2121 _perf_total_compile_count->inc();
2122 }
2124 if (is_osr) {
2125 if (UsePerfData) _perf_total_osr_compile_count->inc();
2126 _total_osr_compile_count++;
2127 } else {
2128 if (UsePerfData) _perf_total_standard_compile_count->inc();
2129 _total_standard_compile_count++;
2130 }
2131 }
2132 // set the current method for the thread to null
2133 if (UsePerfData) counters->set_current_method("");
2134 }
2136 const char* CompileBroker::compiler_name(int comp_level) {
2137 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2138 if (comp == NULL) {
2139 return "no compiler";
2140 } else {
2141 return (comp->name());
2142 }
2143 }
2145 void CompileBroker::print_times() {
2146 tty->cr();
2147 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2148 tty->print_cr("------------------------------------------------");
2149 //0000000000111111111122222222223333333333444444444455555555556666666666
2150 //0123456789012345678901234567890123456789012345678901234567890123456789
2151 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2152 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2153 CompileBroker::_t_standard_compilation.seconds(),
2154 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2155 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);
2157 AbstractCompiler *comp = compiler(CompLevel_simple);
2158 if (comp != NULL) {
2159 comp->print_timers();
2160 }
2161 comp = compiler(CompLevel_full_optimization);
2162 if (comp != NULL) {
2163 comp->print_timers();
2164 }
2165 tty->cr();
2166 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2167 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2168 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2169 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2170 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2171 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2172 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2173 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2174 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2175 tty->cr();
2176 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2177 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2178 }
2181 // Debugging output for failure
2182 void CompileBroker::print_last_compile() {
2183 if ( _last_compile_level != CompLevel_none &&
2184 compiler(_last_compile_level) != NULL &&
2185 _last_method_compiled != NULL &&
2186 _last_compile_type != no_compile) {
2187 if (_last_compile_type == osr_compile) {
2188 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2189 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2190 } else {
2191 tty->print_cr("Last parse: %d+++(%d) %s",
2192 _compilation_id, _last_compile_level, _last_method_compiled);
2193 }
2194 }
2195 }
2198 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2199 #ifndef PRODUCT
2200 st->print_cr("Compiler thread printing unimplemented.");
2201 st->cr();
2202 #endif
2203 }