Sat, 01 Sep 2012 13:25:18 -0400
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
1 /*
2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/codeCache.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/nativeLookup.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/init.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/os.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/sweeper.hpp"
46 #include "utilities/dtrace.hpp"
47 #include "utilities/events.hpp"
48 #ifdef COMPILER1
49 #include "c1/c1_Compiler.hpp"
50 #endif
51 #ifdef COMPILER2
52 #include "opto/c2compiler.hpp"
53 #endif
54 #ifdef SHARK
55 #include "shark/sharkCompiler.hpp"
56 #endif
58 #ifdef DTRACE_ENABLED
60 // Only bother with this argument setup if dtrace is available
62 #ifndef USDT2
63 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
64 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
65 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
66 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
68 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
69 { \
70 char* comp_name = (char*)(compiler)->name(); \
71 Symbol* klass_name = (method)->klass_name(); \
72 Symbol* name = (method)->name(); \
73 Symbol* signature = (method)->signature(); \
74 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
75 comp_name, strlen(comp_name), \
76 klass_name->bytes(), klass_name->utf8_length(), \
77 name->bytes(), name->utf8_length(), \
78 signature->bytes(), signature->utf8_length()); \
79 }
81 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
82 { \
83 char* comp_name = (char*)(compiler)->name(); \
84 Symbol* klass_name = (method)->klass_name(); \
85 Symbol* name = (method)->name(); \
86 Symbol* signature = (method)->signature(); \
87 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
88 comp_name, strlen(comp_name), \
89 klass_name->bytes(), klass_name->utf8_length(), \
90 name->bytes(), name->utf8_length(), \
91 signature->bytes(), signature->utf8_length(), (success)); \
92 }
94 #else /* USDT2 */
96 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
97 { \
98 char* comp_name = (char*)(compiler)->name(); \
99 Symbol* klass_name = (method)->klass_name(); \
100 Symbol* name = (method)->name(); \
101 Symbol* signature = (method)->signature(); \
102 HOTSPOT_METHOD_COMPILE_BEGIN( \
103 comp_name, strlen(comp_name), \
104 (char *) klass_name->bytes(), klass_name->utf8_length(), \
105 (char *) name->bytes(), name->utf8_length(), \
106 (char *) signature->bytes(), signature->utf8_length()); \
107 }
109 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
110 { \
111 char* comp_name = (char*)(compiler)->name(); \
112 Symbol* klass_name = (method)->klass_name(); \
113 Symbol* name = (method)->name(); \
114 Symbol* signature = (method)->signature(); \
115 HOTSPOT_METHOD_COMPILE_END( \
116 comp_name, strlen(comp_name), \
117 (char *) klass_name->bytes(), klass_name->utf8_length(), \
118 (char *) name->bytes(), name->utf8_length(), \
119 (char *) signature->bytes(), signature->utf8_length(), (success)); \
120 }
121 #endif /* USDT2 */
123 #else // ndef DTRACE_ENABLED
125 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
126 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
128 #endif // ndef DTRACE_ENABLED
130 bool CompileBroker::_initialized = false;
131 volatile bool CompileBroker::_should_block = false;
132 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
134 // The installed compiler(s)
135 AbstractCompiler* CompileBroker::_compilers[2];
137 // These counters are used for assigning id's to each compilation
138 uint CompileBroker::_compilation_id = 0;
139 uint CompileBroker::_osr_compilation_id = 0;
141 // Debugging information
142 int CompileBroker::_last_compile_type = no_compile;
143 int CompileBroker::_last_compile_level = CompLevel_none;
144 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
146 // Performance counters
147 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
148 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
149 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
151 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
153 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
154 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
155 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
157 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
158 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
159 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
160 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
162 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
163 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
164 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
165 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
166 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
167 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
168 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
170 // Timers and counters for generating statistics
171 elapsedTimer CompileBroker::_t_total_compilation;
172 elapsedTimer CompileBroker::_t_osr_compilation;
173 elapsedTimer CompileBroker::_t_standard_compilation;
175 int CompileBroker::_total_bailout_count = 0;
176 int CompileBroker::_total_invalidated_count = 0;
177 int CompileBroker::_total_compile_count = 0;
178 int CompileBroker::_total_osr_compile_count = 0;
179 int CompileBroker::_total_standard_compile_count = 0;
181 int CompileBroker::_sum_osr_bytes_compiled = 0;
182 int CompileBroker::_sum_standard_bytes_compiled = 0;
183 int CompileBroker::_sum_nmethod_size = 0;
184 int CompileBroker::_sum_nmethod_code_size = 0;
186 CompileQueue* CompileBroker::_c2_method_queue = NULL;
187 CompileQueue* CompileBroker::_c1_method_queue = NULL;
188 CompileTask* CompileBroker::_task_free_list = NULL;
190 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream 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 %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm->compile_id(), nm->is_osr_method() ? "%" : "",
209 nm, nm->code_begin(), nm->code_end());
210 }
212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
213 StringLogMessage lm;
214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
215 if (retry_message != NULL) {
216 lm.append(" (%s)", retry_message);
217 }
218 lm.print("\n");
219 log(thread, "%s", (const char*)lm);
220 }
221 };
223 static CompilationLog* _compilation_log = NULL;
225 void compileBroker_init() {
226 if (LogEvents) {
227 _compilation_log = new CompilationLog();
228 }
229 }
231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
232 CompilerThread* thread = CompilerThread::current();
233 thread->set_task(task);
234 CompileLog* log = thread->log();
235 if (log != NULL) task->log_task_start(log);
236 }
238 CompileTaskWrapper::~CompileTaskWrapper() {
239 CompilerThread* thread = CompilerThread::current();
240 CompileTask* task = thread->task();
241 CompileLog* log = thread->log();
242 if (log != NULL) task->log_task_done(log);
243 thread->set_task(NULL);
244 task->set_code_handle(NULL);
245 thread->set_env(NULL);
246 if (task->is_blocking()) {
247 MutexLocker notifier(task->lock(), thread);
248 task->mark_complete();
249 // Notify the waiting thread that the compilation has completed.
250 task->lock()->notify_all();
251 } else {
252 task->mark_complete();
254 // By convention, the compiling thread is responsible for
255 // recycling a non-blocking CompileTask.
256 CompileBroker::free_task(task);
257 }
258 }
261 // ------------------------------------------------------------------
262 // CompileTask::initialize
263 void CompileTask::initialize(int compile_id,
264 methodHandle method,
265 int osr_bci,
266 int comp_level,
267 methodHandle hot_method,
268 int hot_count,
269 const char* comment,
270 bool is_blocking) {
271 assert(!_lock->is_locked(), "bad locking");
273 _compile_id = compile_id;
274 _method = method();
275 _method_loader = JNIHandles::make_global(_method->method_holder()->class_loader());
276 _osr_bci = osr_bci;
277 _is_blocking = is_blocking;
278 _comp_level = comp_level;
279 _num_inlined_bytecodes = 0;
281 _is_complete = false;
282 _is_success = false;
283 _code_handle = NULL;
285 _hot_method = NULL;
286 _hot_method_loader = NULL;
287 _hot_count = hot_count;
288 _time_queued = 0; // tidy
289 _comment = comment;
291 if (LogCompilation) {
292 _time_queued = os::elapsed_counter();
293 if (hot_method.not_null()) {
294 if (hot_method == method) {
295 _hot_method = _method;
296 } else {
297 _hot_method = hot_method();
298 }
299 _hot_method_loader = JNIHandles::make_global(_hot_method->method_holder()->class_loader());
300 }
301 }
303 _next = NULL;
304 }
306 // ------------------------------------------------------------------
307 // CompileTask::code/set_code
308 nmethod* CompileTask::code() const {
309 if (_code_handle == NULL) return NULL;
310 return _code_handle->code();
311 }
312 void CompileTask::set_code(nmethod* nm) {
313 if (_code_handle == NULL && nm == NULL) return;
314 guarantee(_code_handle != NULL, "");
315 _code_handle->set_code(nm);
316 if (nm == NULL) _code_handle = NULL; // drop the handle also
317 }
319 // ------------------------------------------------------------------
320 // CompileTask::free
321 void CompileTask::free() {
322 set_code(NULL);
323 assert(!_lock->is_locked(), "Should not be locked when freed");
324 JNIHandles::destroy_global(_method_loader);
325 JNIHandles::destroy_global(_hot_method_loader);
326 }
329 void CompileTask::mark_on_stack() {
330 // Mark these methods as something redefine classes cannot remove.
331 _method->set_on_stack(true);
332 if (_hot_method != NULL) {
333 _hot_method->set_on_stack(true);
334 }
335 }
337 // ------------------------------------------------------------------
338 // CompileTask::print
339 void CompileTask::print() {
340 tty->print("<CompileTask compile_id=%d ", _compile_id);
341 tty->print("method=");
342 _method->print_name(tty);
343 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
344 _osr_bci, bool_to_str(_is_blocking),
345 bool_to_str(_is_complete), bool_to_str(_is_success));
346 }
349 // ------------------------------------------------------------------
350 // CompileTask::print_line_on_error
351 //
352 // This function is called by fatal error handler when the thread
353 // causing troubles is a compiler thread.
354 //
355 // Do not grab any lock, do not allocate memory.
356 //
357 // Otherwise it's the same as CompileTask::print_line()
358 //
359 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
360 // print compiler name
361 st->print("%s:", CompileBroker::compiler(comp_level())->name());
362 print_compilation(st);
363 }
365 // ------------------------------------------------------------------
366 // CompileTask::print_line
367 void CompileTask::print_line() {
368 ttyLocker ttyl; // keep the following output all in one block
369 // print compiler name if requested
370 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
371 print_compilation();
372 }
375 // ------------------------------------------------------------------
376 // CompileTask::print_compilation_impl
377 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
378 bool is_osr_method, int osr_bci, bool is_blocking,
379 const char* msg, bool short_form) {
380 if (!short_form) {
381 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
382 }
383 st->print("%4d ", compile_id); // print compilation number
385 // For unloaded methods the transition to zombie occurs after the
386 // method is cleared so it's impossible to report accurate
387 // information for that case.
388 bool is_synchronized = false;
389 bool has_exception_handler = false;
390 bool is_native = false;
391 if (method != NULL) {
392 is_synchronized = method->is_synchronized();
393 has_exception_handler = method->has_exception_handler();
394 is_native = method->is_native();
395 }
396 // method attributes
397 const char compile_type = is_osr_method ? '%' : ' ';
398 const char sync_char = is_synchronized ? 's' : ' ';
399 const char exception_char = has_exception_handler ? '!' : ' ';
400 const char blocking_char = is_blocking ? 'b' : ' ';
401 const char native_char = is_native ? 'n' : ' ';
403 // print method attributes
404 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
406 if (TieredCompilation) {
407 if (comp_level != -1) st->print("%d ", comp_level);
408 else st->print("- ");
409 }
410 st->print(" "); // more indent
412 if (method == NULL) {
413 st->print("(method)");
414 } else {
415 method->print_short_name(st);
416 if (is_osr_method) {
417 st->print(" @ %d", osr_bci);
418 }
419 if (method->is_native())
420 st->print(" (native)");
421 else
422 st->print(" (%d bytes)", method->code_size());
423 }
425 if (msg != NULL) {
426 st->print(" %s", msg);
427 }
428 if (!short_form) {
429 st->cr();
430 }
431 }
433 // ------------------------------------------------------------------
434 // CompileTask::print_inlining
435 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
436 // 1234567
437 st->print(" "); // print timestamp
438 // 1234
439 st->print(" "); // print compilation number
441 // method attributes
442 if (method->is_loaded()) {
443 const char sync_char = method->is_synchronized() ? 's' : ' ';
444 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
445 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
447 // print method attributes
448 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
449 } else {
450 // %s!bn
451 st->print(" "); // print method attributes
452 }
454 if (TieredCompilation) {
455 st->print(" ");
456 }
457 st->print(" "); // more indent
458 st->print(" "); // initial inlining indent
460 for (int i = 0; i < inline_level; i++) st->print(" ");
462 st->print("@ %d ", bci); // print bci
463 method->print_short_name(st);
464 if (method->is_loaded())
465 st->print(" (%d bytes)", method->code_size());
466 else
467 st->print(" (not loaded)");
469 if (msg != NULL) {
470 st->print(" %s", msg);
471 }
472 st->cr();
473 }
475 // ------------------------------------------------------------------
476 // CompileTask::print_inline_indent
477 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
478 // 1234567
479 st->print(" "); // print timestamp
480 // 1234
481 st->print(" "); // print compilation number
482 // %s!bn
483 st->print(" "); // print method attributes
484 if (TieredCompilation) {
485 st->print(" ");
486 }
487 st->print(" "); // more indent
488 st->print(" "); // initial inlining indent
489 for (int i = 0; i < inline_level; i++) st->print(" ");
490 }
492 // ------------------------------------------------------------------
493 // CompileTask::print_compilation
494 void CompileTask::print_compilation(outputStream* st, bool short_form) {
495 bool is_osr_method = osr_bci() != InvocationEntryBci;
496 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), NULL, short_form);
497 }
499 // ------------------------------------------------------------------
500 // CompileTask::log_task
501 void CompileTask::log_task(xmlStream* log) {
502 Thread* thread = Thread::current();
503 methodHandle method(thread, this->method());
504 ResourceMark rm(thread);
506 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
507 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id);
508 if (_osr_bci != CompileBroker::standard_entry_bci) {
509 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
510 } // else compile_kind='c2c'
511 if (!method.is_null()) log->method(method);
512 if (_osr_bci != CompileBroker::standard_entry_bci) {
513 log->print(" osr_bci='%d'", _osr_bci);
514 }
515 if (_comp_level != CompLevel_highest_tier) {
516 log->print(" level='%d'", _comp_level);
517 }
518 if (_is_blocking) {
519 log->print(" blocking='1'");
520 }
521 log->stamp();
522 }
525 // ------------------------------------------------------------------
526 // CompileTask::log_task_queued
527 void CompileTask::log_task_queued() {
528 Thread* thread = Thread::current();
529 ttyLocker ttyl;
530 ResourceMark rm(thread);
532 xtty->begin_elem("task_queued");
533 log_task(xtty);
534 if (_comment != NULL) {
535 xtty->print(" comment='%s'", _comment);
536 }
537 if (_hot_method != NULL) {
538 methodHandle hot(thread, _hot_method);
539 methodHandle method(thread, _method);
540 if (hot() != method()) {
541 xtty->method(hot);
542 }
543 }
544 if (_hot_count != 0) {
545 xtty->print(" hot_count='%d'", _hot_count);
546 }
547 xtty->end_elem();
548 }
551 // ------------------------------------------------------------------
552 // CompileTask::log_task_start
553 void CompileTask::log_task_start(CompileLog* log) {
554 log->begin_head("task");
555 log_task(log);
556 log->end_head();
557 }
560 // ------------------------------------------------------------------
561 // CompileTask::log_task_done
562 void CompileTask::log_task_done(CompileLog* log) {
563 Thread* thread = Thread::current();
564 methodHandle method(thread, this->method());
565 ResourceMark rm(thread);
567 // <task_done ... stamp='1.234'> </task>
568 nmethod* nm = code();
569 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
570 _is_success, nm == NULL ? 0 : nm->content_size(),
571 method->invocation_count());
572 int bec = method->backedge_count();
573 if (bec != 0) log->print(" backedge_count='%d'", bec);
574 // Note: "_is_complete" is about to be set, but is not.
575 if (_num_inlined_bytecodes != 0) {
576 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
577 }
578 log->stamp();
579 log->end_elem();
580 log->tail("task");
581 log->clear_identities(); // next task will have different CI
582 if (log->unflushed_count() > 2000) {
583 log->flush();
584 }
585 log->mark_file_end();
586 }
590 // ------------------------------------------------------------------
591 // CompileQueue::add
592 //
593 // Add a CompileTask to a CompileQueue
594 void CompileQueue::add(CompileTask* task) {
595 assert(lock()->owned_by_self(), "must own lock");
597 task->set_next(NULL);
598 task->set_prev(NULL);
600 if (_last == NULL) {
601 // The compile queue is empty.
602 assert(_first == NULL, "queue is empty");
603 _first = task;
604 _last = task;
605 } else {
606 // Append the task to the queue.
607 assert(_last->next() == NULL, "not last");
608 _last->set_next(task);
609 task->set_prev(_last);
610 _last = task;
611 }
612 ++_size;
614 // Mark the method as being in the compile queue.
615 task->method()->set_queued_for_compilation();
617 if (CIPrintCompileQueue) {
618 print();
619 }
621 if (LogCompilation && xtty != NULL) {
622 task->log_task_queued();
623 }
625 // Notify CompilerThreads that a task is available.
626 lock()->notify_all();
627 }
629 // ------------------------------------------------------------------
630 // CompileQueue::get
631 //
632 // Get the next CompileTask from a CompileQueue
633 CompileTask* CompileQueue::get() {
634 NMethodSweeper::possibly_sweep();
636 MutexLocker locker(lock());
637 // Wait for an available CompileTask.
638 while (_first == NULL) {
639 // There is no work to be done right now. Wait.
640 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
641 // During the emergency sweeping periods, wake up and sweep occasionally
642 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
643 if (timedout) {
644 MutexUnlocker ul(lock());
645 // When otherwise not busy, run nmethod sweeping
646 NMethodSweeper::possibly_sweep();
647 }
648 } else {
649 // During normal operation no need to wake up on timer
650 lock()->wait();
651 }
652 }
653 CompileTask* task = CompilationPolicy::policy()->select_task(this);
654 remove(task);
655 return task;
656 }
658 void CompileQueue::remove(CompileTask* task)
659 {
660 assert(lock()->owned_by_self(), "must own lock");
661 if (task->prev() != NULL) {
662 task->prev()->set_next(task->next());
663 } else {
664 // max is the first element
665 assert(task == _first, "Sanity");
666 _first = task->next();
667 }
669 if (task->next() != NULL) {
670 task->next()->set_prev(task->prev());
671 } else {
672 // max is the last element
673 assert(task == _last, "Sanity");
674 _last = task->prev();
675 }
676 --_size;
677 }
679 // methods in the compile queue need to be marked as used on the stack
680 // so that they don't get reclaimed by Redefine Classes
681 void CompileQueue::mark_on_stack() {
682 CompileTask* task = _first;
683 while (task != NULL) {
684 task->mark_on_stack();
685 task = task->next();
686 }
687 }
689 // ------------------------------------------------------------------
690 // CompileQueue::print
691 void CompileQueue::print() {
692 tty->print_cr("Contents of %s", name());
693 tty->print_cr("----------------------");
694 CompileTask* task = _first;
695 while (task != NULL) {
696 task->print_line();
697 task = task->next();
698 }
699 tty->print_cr("----------------------");
700 }
702 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
704 _current_method[0] = '\0';
705 _compile_type = CompileBroker::no_compile;
707 if (UsePerfData) {
708 ResourceMark rm;
710 // create the thread instance name space string - don't create an
711 // instance subspace if instance is -1 - keeps the adapterThread
712 // counters from having a ".0" namespace.
713 const char* thread_i = (instance == -1) ? thread_name :
714 PerfDataManager::name_space(thread_name, instance);
717 char* name = PerfDataManager::counter_name(thread_i, "method");
718 _perf_current_method =
719 PerfDataManager::create_string_variable(SUN_CI, name,
720 cmname_buffer_length,
721 _current_method, CHECK);
723 name = PerfDataManager::counter_name(thread_i, "type");
724 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
725 PerfData::U_None,
726 (jlong)_compile_type,
727 CHECK);
729 name = PerfDataManager::counter_name(thread_i, "time");
730 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
731 PerfData::U_Ticks, CHECK);
733 name = PerfDataManager::counter_name(thread_i, "compiles");
734 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
735 PerfData::U_Events, CHECK);
736 }
737 }
739 // ------------------------------------------------------------------
740 // CompileBroker::compilation_init
741 //
742 // Initialize the Compilation object
743 void CompileBroker::compilation_init() {
744 _last_method_compiled[0] = '\0';
746 #ifndef SHARK
747 // Set the interface to the current compiler(s).
748 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
749 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
750 #ifdef COMPILER1
751 if (c1_count > 0) {
752 _compilers[0] = new Compiler();
753 }
754 #endif // COMPILER1
756 #ifdef COMPILER2
757 if (c2_count > 0) {
758 _compilers[1] = new C2Compiler();
759 }
760 #endif // COMPILER2
762 #else // SHARK
763 int c1_count = 0;
764 int c2_count = 1;
766 _compilers[1] = new SharkCompiler();
767 #endif // SHARK
769 // Initialize the CompileTask free list
770 _task_free_list = NULL;
772 // Start the CompilerThreads
773 init_compiler_threads(c1_count, c2_count);
774 // totalTime performance counter is always created as it is required
775 // by the implementation of java.lang.management.CompilationMBean.
776 {
777 EXCEPTION_MARK;
778 _perf_total_compilation =
779 PerfDataManager::create_counter(JAVA_CI, "totalTime",
780 PerfData::U_Ticks, CHECK);
781 }
784 if (UsePerfData) {
786 EXCEPTION_MARK;
788 // create the jvmstat performance counters
789 _perf_osr_compilation =
790 PerfDataManager::create_counter(SUN_CI, "osrTime",
791 PerfData::U_Ticks, CHECK);
793 _perf_standard_compilation =
794 PerfDataManager::create_counter(SUN_CI, "standardTime",
795 PerfData::U_Ticks, CHECK);
797 _perf_total_bailout_count =
798 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
799 PerfData::U_Events, CHECK);
801 _perf_total_invalidated_count =
802 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
803 PerfData::U_Events, CHECK);
805 _perf_total_compile_count =
806 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
807 PerfData::U_Events, CHECK);
808 _perf_total_osr_compile_count =
809 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
810 PerfData::U_Events, CHECK);
812 _perf_total_standard_compile_count =
813 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
814 PerfData::U_Events, CHECK);
816 _perf_sum_osr_bytes_compiled =
817 PerfDataManager::create_counter(SUN_CI, "osrBytes",
818 PerfData::U_Bytes, CHECK);
820 _perf_sum_standard_bytes_compiled =
821 PerfDataManager::create_counter(SUN_CI, "standardBytes",
822 PerfData::U_Bytes, CHECK);
824 _perf_sum_nmethod_size =
825 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
826 PerfData::U_Bytes, CHECK);
828 _perf_sum_nmethod_code_size =
829 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
830 PerfData::U_Bytes, CHECK);
832 _perf_last_method =
833 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
834 CompilerCounters::cmname_buffer_length,
835 "", CHECK);
837 _perf_last_failed_method =
838 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
839 CompilerCounters::cmname_buffer_length,
840 "", CHECK);
842 _perf_last_invalidated_method =
843 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
844 CompilerCounters::cmname_buffer_length,
845 "", CHECK);
847 _perf_last_compile_type =
848 PerfDataManager::create_variable(SUN_CI, "lastType",
849 PerfData::U_None,
850 (jlong)CompileBroker::no_compile,
851 CHECK);
853 _perf_last_compile_size =
854 PerfDataManager::create_variable(SUN_CI, "lastSize",
855 PerfData::U_Bytes,
856 (jlong)CompileBroker::no_compile,
857 CHECK);
860 _perf_last_failed_type =
861 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
862 PerfData::U_None,
863 (jlong)CompileBroker::no_compile,
864 CHECK);
866 _perf_last_invalidated_type =
867 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
868 PerfData::U_None,
869 (jlong)CompileBroker::no_compile,
870 CHECK);
871 }
873 _initialized = true;
874 }
878 // ------------------------------------------------------------------
879 // CompileBroker::make_compiler_thread
880 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
881 CompilerThread* compiler_thread = NULL;
883 Klass* k =
884 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
885 true, CHECK_0);
886 instanceKlassHandle klass (THREAD, k);
887 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
888 Handle string = java_lang_String::create_from_str(name, CHECK_0);
890 // Initialize thread_oop to put it into the system threadGroup
891 Handle thread_group (THREAD, Universe::system_thread_group());
892 JavaValue result(T_VOID);
893 JavaCalls::call_special(&result, thread_oop,
894 klass,
895 vmSymbols::object_initializer_name(),
896 vmSymbols::threadgroup_string_void_signature(),
897 thread_group,
898 string,
899 CHECK_0);
901 {
902 MutexLocker mu(Threads_lock, THREAD);
903 compiler_thread = new CompilerThread(queue, counters);
904 // At this point the new CompilerThread data-races with this startup
905 // thread (which I believe is the primoridal thread and NOT the VM
906 // thread). This means Java bytecodes being executed at startup can
907 // queue compile jobs which will run at whatever default priority the
908 // newly created CompilerThread runs at.
911 // At this point it may be possible that no osthread was created for the
912 // JavaThread due to lack of memory. We would have to throw an exception
913 // in that case. However, since this must work and we do not allow
914 // exceptions anyway, check and abort if this fails.
916 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
917 vm_exit_during_initialization("java.lang.OutOfMemoryError",
918 "unable to create new native thread");
919 }
921 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
923 // Note that this only sets the JavaThread _priority field, which by
924 // definition is limited to Java priorities and not OS priorities.
925 // The os-priority is set in the CompilerThread startup code itself
927 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
929 // Note that we cannot call os::set_priority because it expects Java
930 // priorities and we are *explicitly* using OS priorities so that it's
931 // possible to set the compiler thread priority higher than any Java
932 // thread.
934 int native_prio = CompilerThreadPriority;
935 if (native_prio == -1) {
936 if (UseCriticalCompilerThreadPriority) {
937 native_prio = os::java_to_os_priority[CriticalPriority];
938 } else {
939 native_prio = os::java_to_os_priority[NearMaxPriority];
940 }
941 }
942 os::set_native_priority(compiler_thread, native_prio);
944 java_lang_Thread::set_daemon(thread_oop());
946 compiler_thread->set_threadObj(thread_oop());
947 Threads::add(compiler_thread);
948 Thread::start(compiler_thread);
949 }
951 // Let go of Threads_lock before yielding
952 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
954 return compiler_thread;
955 }
958 // ------------------------------------------------------------------
959 // CompileBroker::init_compiler_threads
960 //
961 // Initialize the compilation queue
962 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
963 EXCEPTION_MARK;
964 #if !defined(ZERO) && !defined(SHARK)
965 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
966 #endif // !ZERO && !SHARK
967 if (c2_compiler_count > 0) {
968 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
969 }
970 if (c1_compiler_count > 0) {
971 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
972 }
974 int compiler_count = c1_compiler_count + c2_compiler_count;
976 _method_threads =
977 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
979 char name_buffer[256];
980 for (int i = 0; i < c2_compiler_count; i++) {
981 // Create a name for our thread.
982 sprintf(name_buffer, "C2 CompilerThread%d", i);
983 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
984 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK);
985 _method_threads->append(new_thread);
986 }
988 for (int i = c2_compiler_count; i < compiler_count; i++) {
989 // Create a name for our thread.
990 sprintf(name_buffer, "C1 CompilerThread%d", i);
991 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
992 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK);
993 _method_threads->append(new_thread);
994 }
996 if (UsePerfData) {
997 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
998 compiler_count, CHECK);
999 }
1000 }
1003 // Set the methods on the stack as on_stack so that redefine classes doesn't
1004 // reclaim them
1005 void CompileBroker::mark_on_stack() {
1006 if (_c2_method_queue != NULL) {
1007 _c2_method_queue->mark_on_stack();
1008 }
1009 if (_c1_method_queue != NULL) {
1010 _c1_method_queue->mark_on_stack();
1011 }
1012 }
1014 // ------------------------------------------------------------------
1015 // CompileBroker::is_idle
1016 bool CompileBroker::is_idle() {
1017 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) {
1018 return false;
1019 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) {
1020 return false;
1021 } else {
1022 int num_threads = _method_threads->length();
1023 for (int i=0; i<num_threads; i++) {
1024 if (_method_threads->at(i)->task() != NULL) {
1025 return false;
1026 }
1027 }
1029 // No pending or active compilations.
1030 return true;
1031 }
1032 }
1035 // ------------------------------------------------------------------
1036 // CompileBroker::compile_method
1037 //
1038 // Request compilation of a method.
1039 void CompileBroker::compile_method_base(methodHandle method,
1040 int osr_bci,
1041 int comp_level,
1042 methodHandle hot_method,
1043 int hot_count,
1044 const char* comment,
1045 Thread* thread) {
1046 // do nothing if compiler thread(s) is not available
1047 if (!_initialized ) {
1048 return;
1049 }
1051 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1052 assert(method->method_holder()->oop_is_instance(),
1053 "sanity check");
1054 assert(!InstanceKlass::cast(method->method_holder())->is_not_initialized(),
1055 "method holder must be initialized");
1056 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1058 if (CIPrintRequests) {
1059 tty->print("request: ");
1060 method->print_short_name(tty);
1061 if (osr_bci != InvocationEntryBci) {
1062 tty->print(" osr_bci: %d", osr_bci);
1063 }
1064 tty->print(" comment: %s count: %d", comment, hot_count);
1065 if (!hot_method.is_null()) {
1066 tty->print(" hot: ");
1067 if (hot_method() != method()) {
1068 hot_method->print_short_name(tty);
1069 } else {
1070 tty->print("yes");
1071 }
1072 }
1073 tty->cr();
1074 }
1076 // A request has been made for compilation. Before we do any
1077 // real work, check to see if the method has been compiled
1078 // in the meantime with a definitive result.
1079 if (compilation_is_complete(method, osr_bci, comp_level)) {
1080 return;
1081 }
1083 #ifndef PRODUCT
1084 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1085 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1086 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1087 return;
1088 }
1089 }
1090 #endif
1092 // If this method is already in the compile queue, then
1093 // we do not block the current thread.
1094 if (compilation_is_in_queue(method, osr_bci)) {
1095 // We may want to decay our counter a bit here to prevent
1096 // multiple denied requests for compilation. This is an
1097 // open compilation policy issue. Note: The other possibility,
1098 // in the case that this is a blocking compile request, is to have
1099 // all subsequent blocking requesters wait for completion of
1100 // ongoing compiles. Note that in this case we'll need a protocol
1101 // for freeing the associated compile tasks. [Or we could have
1102 // a single static monitor on which all these waiters sleep.]
1103 return;
1104 }
1106 // If the requesting thread is holding the pending list lock
1107 // then we just return. We can't risk blocking while holding
1108 // the pending list lock or a 3-way deadlock may occur
1109 // between the reference handler thread, a GC (instigated
1110 // by a compiler thread), and compiled method registration.
1111 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1112 return;
1113 }
1115 // Outputs from the following MutexLocker block:
1116 CompileTask* task = NULL;
1117 bool blocking = false;
1118 CompileQueue* queue = compile_queue(comp_level);
1120 // Acquire our lock.
1121 {
1122 MutexLocker locker(queue->lock(), thread);
1124 // Make sure the method has not slipped into the queues since
1125 // last we checked; note that those checks were "fast bail-outs".
1126 // Here we need to be more careful, see 14012000 below.
1127 if (compilation_is_in_queue(method, osr_bci)) {
1128 return;
1129 }
1131 // We need to check again to see if the compilation has
1132 // completed. A previous compilation may have registered
1133 // some result.
1134 if (compilation_is_complete(method, osr_bci, comp_level)) {
1135 return;
1136 }
1138 // We now know that this compilation is not pending, complete,
1139 // or prohibited. Assign a compile_id to this compilation
1140 // and check to see if it is in our [Start..Stop) range.
1141 uint compile_id = assign_compile_id(method, osr_bci);
1142 if (compile_id == 0) {
1143 // The compilation falls outside the allowed range.
1144 return;
1145 }
1147 // Should this thread wait for completion of the compile?
1148 blocking = is_compile_blocking(method, osr_bci);
1150 // We will enter the compilation in the queue.
1151 // 14012000: Note that this sets the queued_for_compile bits in
1152 // the target method. We can now reason that a method cannot be
1153 // queued for compilation more than once, as follows:
1154 // Before a thread queues a task for compilation, it first acquires
1155 // the compile queue lock, then checks if the method's queued bits
1156 // are set or it has already been compiled. Thus there can not be two
1157 // instances of a compilation task for the same method on the
1158 // compilation queue. Consider now the case where the compilation
1159 // thread has already removed a task for that method from the queue
1160 // and is in the midst of compiling it. In this case, the
1161 // queued_for_compile bits must be set in the method (and these
1162 // will be visible to the current thread, since the bits were set
1163 // under protection of the compile queue lock, which we hold now.
1164 // When the compilation completes, the compiler thread first sets
1165 // the compilation result and then clears the queued_for_compile
1166 // bits. Neither of these actions are protected by a barrier (or done
1167 // under the protection of a lock), so the only guarantee we have
1168 // (on machines with TSO (Total Store Order)) is that these values
1169 // will update in that order. As a result, the only combinations of
1170 // these bits that the current thread will see are, in temporal order:
1171 // <RESULT, QUEUE> :
1172 // <0, 1> : in compile queue, but not yet compiled
1173 // <1, 1> : compiled but queue bit not cleared
1174 // <1, 0> : compiled and queue bit cleared
1175 // Because we first check the queue bits then check the result bits,
1176 // we are assured that we cannot introduce a duplicate task.
1177 // Note that if we did the tests in the reverse order (i.e. check
1178 // result then check queued bit), we could get the result bit before
1179 // the compilation completed, and the queue bit after the compilation
1180 // completed, and end up introducing a "duplicate" (redundant) task.
1181 // In that case, the compiler thread should first check if a method
1182 // has already been compiled before trying to compile it.
1183 // NOTE: in the event that there are multiple compiler threads and
1184 // there is de-optimization/recompilation, things will get hairy,
1185 // and in that case it's best to protect both the testing (here) of
1186 // these bits, and their updating (here and elsewhere) under a
1187 // common lock.
1188 task = create_compile_task(queue,
1189 compile_id, method,
1190 osr_bci, comp_level,
1191 hot_method, hot_count, comment,
1192 blocking);
1193 }
1195 if (blocking) {
1196 wait_for_completion(task);
1197 }
1198 }
1201 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1202 int comp_level,
1203 methodHandle hot_method, int hot_count,
1204 const char* comment, Thread* THREAD) {
1205 // make sure arguments make sense
1206 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1207 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1208 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1209 assert(!InstanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
1211 if (!TieredCompilation) {
1212 comp_level = CompLevel_highest_tier;
1213 }
1215 // return quickly if possible
1217 // lock, make sure that the compilation
1218 // isn't prohibited in a straightforward way.
1220 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
1221 return NULL;
1222 }
1224 if (osr_bci == InvocationEntryBci) {
1225 // standard compilation
1226 nmethod* method_code = method->code();
1227 if (method_code != NULL) {
1228 if (compilation_is_complete(method, osr_bci, comp_level)) {
1229 return method_code;
1230 }
1231 }
1232 if (method->is_not_compilable(comp_level)) return NULL;
1234 if (UseCodeCacheFlushing) {
1235 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1236 if (saved != NULL) {
1237 method->set_code(method, saved);
1238 return saved;
1239 }
1240 }
1242 } else {
1243 // osr compilation
1244 #ifndef TIERED
1245 // seems like an assert of dubious value
1246 assert(comp_level == CompLevel_highest_tier,
1247 "all OSR compiles are assumed to be at a single compilation lavel");
1248 #endif // TIERED
1249 // We accept a higher level osr method
1250 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1251 if (nm != NULL) return nm;
1252 if (method->is_not_osr_compilable()) return NULL;
1253 }
1255 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1256 // some prerequisites that are compiler specific
1257 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) {
1258 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1259 // Resolve all classes seen in the signature of the method
1260 // we are compiling.
1261 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1262 }
1264 // If the method is native, do the lookup in the thread requesting
1265 // the compilation. Native lookups can load code, which is not
1266 // permitted during compilation.
1267 //
1268 // Note: A native method implies non-osr compilation which is
1269 // checked with an assertion at the entry of this method.
1270 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1271 bool in_base_library;
1272 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1273 if (HAS_PENDING_EXCEPTION) {
1274 // In case of an exception looking up the method, we just forget
1275 // about it. The interpreter will kick-in and throw the exception.
1276 method->set_not_compilable(); // implies is_not_osr_compilable()
1277 CLEAR_PENDING_EXCEPTION;
1278 return NULL;
1279 }
1280 assert(method->has_native_function(), "must have native code by now");
1281 }
1283 // RedefineClasses() has replaced this method; just return
1284 if (method->is_old()) {
1285 return NULL;
1286 }
1288 // JVMTI -- post_compile_event requires jmethod_id() that may require
1289 // a lock the compiling thread can not acquire. Prefetch it here.
1290 if (JvmtiExport::should_post_compiled_method_load()) {
1291 method->jmethod_id();
1292 }
1294 // If the compiler is shut off due to code cache flushing or otherwise,
1295 // fail out now so blocking compiles dont hang the java thread
1296 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1297 CompilationPolicy::policy()->delay_compilation(method());
1298 return NULL;
1299 }
1301 // do the compilation
1302 if (method->is_native()) {
1303 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1304 // Acquire our lock.
1305 int compile_id;
1306 {
1307 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1308 compile_id = assign_compile_id(method, standard_entry_bci);
1309 }
1310 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1311 } else {
1312 return NULL;
1313 }
1314 } else {
1315 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1316 }
1318 // return requested nmethod
1319 // We accept a higher level osr method
1320 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1321 }
1324 // ------------------------------------------------------------------
1325 // CompileBroker::compilation_is_complete
1326 //
1327 // See if compilation of this method is already complete.
1328 bool CompileBroker::compilation_is_complete(methodHandle method,
1329 int osr_bci,
1330 int comp_level) {
1331 bool is_osr = (osr_bci != standard_entry_bci);
1332 if (is_osr) {
1333 if (method->is_not_osr_compilable()) {
1334 return true;
1335 } else {
1336 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1337 return (result != NULL);
1338 }
1339 } else {
1340 if (method->is_not_compilable(comp_level)) {
1341 return true;
1342 } else {
1343 nmethod* result = method->code();
1344 if (result == NULL) return false;
1345 return comp_level == result->comp_level();
1346 }
1347 }
1348 }
1351 // ------------------------------------------------------------------
1352 // CompileBroker::compilation_is_in_queue
1353 //
1354 // See if this compilation is already requested.
1355 //
1356 // Implementation note: there is only a single "is in queue" bit
1357 // for each method. This means that the check below is overly
1358 // conservative in the sense that an osr compilation in the queue
1359 // will block a normal compilation from entering the queue (and vice
1360 // versa). This can be remedied by a full queue search to disambiguate
1361 // cases. If it is deemed profitible, this may be done.
1362 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1363 int osr_bci) {
1364 return method->queued_for_compilation();
1365 }
1367 // ------------------------------------------------------------------
1368 // CompileBroker::compilation_is_prohibited
1369 //
1370 // See if this compilation is not allowed.
1371 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1372 bool is_native = method->is_native();
1373 // Some compilers may not support the compilation of natives.
1374 if (is_native &&
1375 (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1376 method->set_not_compilable_quietly(comp_level);
1377 return true;
1378 }
1380 bool is_osr = (osr_bci != standard_entry_bci);
1381 // Some compilers may not support on stack replacement.
1382 if (is_osr &&
1383 (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1384 method->set_not_osr_compilable();
1385 return true;
1386 }
1388 // The method may be explicitly excluded by the user.
1389 bool quietly;
1390 if (CompilerOracle::should_exclude(method, quietly)) {
1391 if (!quietly) {
1392 // This does not happen quietly...
1393 ResourceMark rm;
1394 tty->print("### Excluding %s:%s",
1395 method->is_native() ? "generation of native wrapper" : "compile",
1396 (method->is_static() ? " static" : ""));
1397 method->print_short_name(tty);
1398 tty->cr();
1399 }
1400 method->set_not_compilable_quietly();
1401 }
1403 return false;
1404 }
1407 // ------------------------------------------------------------------
1408 // CompileBroker::assign_compile_id
1409 //
1410 // Assign a serialized id number to this compilation request. If the
1411 // number falls out of the allowed range, return a 0. OSR
1412 // compilations may be numbered separately from regular compilations
1413 // if certain debugging flags are used.
1414 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1415 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1416 "must hold the compilation queue lock");
1417 bool is_osr = (osr_bci != standard_entry_bci);
1418 uint id;
1419 if (CICountOSR && is_osr) {
1420 id = ++_osr_compilation_id;
1421 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1422 return id;
1423 }
1424 } else {
1425 id = ++_compilation_id;
1426 if ((uint)CIStart <= id && id < (uint)CIStop) {
1427 return id;
1428 }
1429 }
1431 // Method was not in the appropriate compilation range.
1432 method->set_not_compilable_quietly();
1433 return 0;
1434 }
1437 // ------------------------------------------------------------------
1438 // CompileBroker::is_compile_blocking
1439 //
1440 // Should the current thread be blocked until this compilation request
1441 // has been fulfilled?
1442 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1443 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1444 return !BackgroundCompilation;
1445 }
1448 // ------------------------------------------------------------------
1449 // CompileBroker::preload_classes
1450 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1451 // Move this code over from c1_Compiler.cpp
1452 ShouldNotReachHere();
1453 }
1456 // ------------------------------------------------------------------
1457 // CompileBroker::create_compile_task
1458 //
1459 // Create a CompileTask object representing the current request for
1460 // compilation. Add this task to the queue.
1461 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1462 int compile_id,
1463 methodHandle method,
1464 int osr_bci,
1465 int comp_level,
1466 methodHandle hot_method,
1467 int hot_count,
1468 const char* comment,
1469 bool blocking) {
1470 CompileTask* new_task = allocate_task();
1471 new_task->initialize(compile_id, method, osr_bci, comp_level,
1472 hot_method, hot_count, comment,
1473 blocking);
1474 queue->add(new_task);
1475 return new_task;
1476 }
1479 // ------------------------------------------------------------------
1480 // CompileBroker::allocate_task
1481 //
1482 // Allocate a CompileTask, from the free list if possible.
1483 CompileTask* CompileBroker::allocate_task() {
1484 MutexLocker locker(CompileTaskAlloc_lock);
1485 CompileTask* task = NULL;
1486 if (_task_free_list != NULL) {
1487 task = _task_free_list;
1488 _task_free_list = task->next();
1489 task->set_next(NULL);
1490 } else {
1491 task = new CompileTask();
1492 task->set_next(NULL);
1493 }
1494 return task;
1495 }
1498 // ------------------------------------------------------------------
1499 // CompileBroker::free_task
1500 //
1501 // Add a task to the free list.
1502 void CompileBroker::free_task(CompileTask* task) {
1503 MutexLocker locker(CompileTaskAlloc_lock);
1504 task->free();
1505 task->set_next(_task_free_list);
1506 _task_free_list = task;
1507 }
1510 // ------------------------------------------------------------------
1511 // CompileBroker::wait_for_completion
1512 //
1513 // Wait for the given method CompileTask to complete.
1514 void CompileBroker::wait_for_completion(CompileTask* task) {
1515 if (CIPrintCompileQueue) {
1516 tty->print_cr("BLOCKING FOR COMPILE");
1517 }
1519 assert(task->is_blocking(), "can only wait on blocking task");
1521 JavaThread *thread = JavaThread::current();
1522 thread->set_blocked_on_compilation(true);
1524 methodHandle method(thread, task->method());
1525 {
1526 MutexLocker waiter(task->lock(), thread);
1528 while (!task->is_complete())
1529 task->lock()->wait();
1530 }
1531 // It is harmless to check this status without the lock, because
1532 // completion is a stable property (until the task object is recycled).
1533 assert(task->is_complete(), "Compilation should have completed");
1534 assert(task->code_handle() == NULL, "must be reset");
1536 thread->set_blocked_on_compilation(false);
1538 // By convention, the waiter is responsible for recycling a
1539 // blocking CompileTask. Since there is only one waiter ever
1540 // waiting on a CompileTask, we know that no one else will
1541 // be using this CompileTask; we can free it.
1542 free_task(task);
1543 }
1545 // ------------------------------------------------------------------
1546 // CompileBroker::compiler_thread_loop
1547 //
1548 // The main loop run by a CompilerThread.
1549 void CompileBroker::compiler_thread_loop() {
1550 CompilerThread* thread = CompilerThread::current();
1551 CompileQueue* queue = thread->queue();
1553 // For the thread that initializes the ciObjectFactory
1554 // this resource mark holds all the shared objects
1555 ResourceMark rm;
1557 // First thread to get here will initialize the compiler interface
1559 if (!ciObjectFactory::is_initialized()) {
1560 ASSERT_IN_VM;
1561 MutexLocker only_one (CompileThread_lock, thread);
1562 if (!ciObjectFactory::is_initialized()) {
1563 ciObjectFactory::initialize();
1564 }
1565 }
1567 // Open a log.
1568 if (LogCompilation) {
1569 init_compiler_thread_log();
1570 }
1571 CompileLog* log = thread->log();
1572 if (log != NULL) {
1573 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1574 os::current_thread_id(),
1575 os::current_process_id());
1576 log->stamp();
1577 log->end_elem();
1578 }
1580 while (true) {
1581 {
1582 // We need this HandleMark to avoid leaking VM handles.
1583 HandleMark hm(thread);
1585 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) {
1586 // the code cache is really full
1587 handle_full_code_cache();
1588 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1589 // Attempt to start cleaning the code cache while there is still a little headroom
1590 NMethodSweeper::handle_full_code_cache(false);
1591 }
1593 CompileTask* task = queue->get();
1595 // Give compiler threads an extra quanta. They tend to be bursty and
1596 // this helps the compiler to finish up the job.
1597 if( CompilerThreadHintNoPreempt )
1598 os::hint_no_preempt();
1600 // trace per thread time and compile statistics
1601 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1602 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1604 // Assign the task to the current thread. Mark this compilation
1605 // thread as active for the profiler.
1606 CompileTaskWrapper ctw(task);
1607 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1608 task->set_code_handle(&result_handle);
1609 methodHandle method(thread, task->method());
1611 // Never compile a method if breakpoints are present in it
1612 if (method()->number_of_breakpoints() == 0) {
1613 // Compile the method.
1614 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1615 #ifdef COMPILER1
1616 // Allow repeating compilations for the purpose of benchmarking
1617 // compile speed. This is not useful for customers.
1618 if (CompilationRepeat != 0) {
1619 int compile_count = CompilationRepeat;
1620 while (compile_count > 0) {
1621 invoke_compiler_on_method(task);
1622 nmethod* nm = method->code();
1623 if (nm != NULL) {
1624 nm->make_zombie();
1625 method->clear_code();
1626 }
1627 compile_count--;
1628 }
1629 }
1630 #endif /* COMPILER1 */
1631 invoke_compiler_on_method(task);
1632 } else {
1633 // After compilation is disabled, remove remaining methods from queue
1634 method->clear_queued_for_compilation();
1635 }
1636 }
1637 }
1638 }
1639 }
1642 // ------------------------------------------------------------------
1643 // CompileBroker::init_compiler_thread_log
1644 //
1645 // Set up state required by +LogCompilation.
1646 void CompileBroker::init_compiler_thread_log() {
1647 CompilerThread* thread = CompilerThread::current();
1648 char fileBuf[4*K];
1649 FILE* fp = NULL;
1650 char* file = NULL;
1651 intx thread_id = os::current_thread_id();
1652 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1653 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1654 if (dir == NULL) {
1655 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1656 thread_id, os::current_process_id());
1657 } else {
1658 jio_snprintf(fileBuf, sizeof(fileBuf),
1659 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1660 os::file_separator(), thread_id, os::current_process_id());
1661 }
1662 fp = fopen(fileBuf, "at");
1663 if (fp != NULL) {
1664 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1, mtCompiler);
1665 strcpy(file, fileBuf);
1666 break;
1667 }
1668 }
1669 if (fp == NULL) {
1670 warning("Cannot open log file: %s", fileBuf);
1671 } else {
1672 if (LogCompilation && Verbose)
1673 tty->print_cr("Opening compilation log %s", file);
1674 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file, fp, thread_id);
1675 thread->init_log(log);
1677 if (xtty != NULL) {
1678 ttyLocker ttyl;
1680 // Record any per thread log files
1681 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1682 }
1683 }
1684 }
1686 // ------------------------------------------------------------------
1687 // CompileBroker::set_should_block
1688 //
1689 // Set _should_block.
1690 // Call this from the VM, with Threads_lock held and a safepoint requested.
1691 void CompileBroker::set_should_block() {
1692 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1693 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1694 #ifndef PRODUCT
1695 if (PrintCompilation && (Verbose || WizardMode))
1696 tty->print_cr("notifying compiler thread pool to block");
1697 #endif
1698 _should_block = true;
1699 }
1701 // ------------------------------------------------------------------
1702 // CompileBroker::maybe_block
1703 //
1704 // Call this from the compiler at convenient points, to poll for _should_block.
1705 void CompileBroker::maybe_block() {
1706 if (_should_block) {
1707 #ifndef PRODUCT
1708 if (PrintCompilation && (Verbose || WizardMode))
1709 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1710 #endif
1711 ThreadInVMfromNative tivfn(JavaThread::current());
1712 }
1713 }
1715 // ------------------------------------------------------------------
1716 // CompileBroker::invoke_compiler_on_method
1717 //
1718 // Compile a method.
1719 //
1720 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1721 if (PrintCompilation) {
1722 ResourceMark rm;
1723 task->print_line();
1724 }
1725 elapsedTimer time;
1727 CompilerThread* thread = CompilerThread::current();
1728 ResourceMark rm(thread);
1730 if (LogEvents) {
1731 _compilation_log->log_compile(thread, task);
1732 }
1734 // Common flags.
1735 uint compile_id = task->compile_id();
1736 int osr_bci = task->osr_bci();
1737 bool is_osr = (osr_bci != standard_entry_bci);
1738 bool should_log = (thread->log() != NULL);
1739 bool should_break = false;
1740 {
1741 // create the handle inside it's own block so it can't
1742 // accidentally be referenced once the thread transitions to
1743 // native. The NoHandleMark before the transition should catch
1744 // any cases where this occurs in the future.
1745 methodHandle method(thread, task->method());
1746 should_break = check_break_at(method, compile_id, is_osr);
1747 if (should_log && !CompilerOracle::should_log(method)) {
1748 should_log = false;
1749 }
1750 assert(!method->is_native(), "no longer compile natives");
1752 // Save information about this method in case of failure.
1753 set_last_compile(thread, method, is_osr, task->comp_level());
1755 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1756 }
1758 // Allocate a new set of JNI handles.
1759 push_jni_handle_block();
1760 Method* target_handle = task->method();
1761 int compilable = ciEnv::MethodCompilable;
1762 {
1763 int system_dictionary_modification_counter;
1764 {
1765 MutexLocker locker(Compile_lock, thread);
1766 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1767 }
1769 NoHandleMark nhm;
1770 ThreadToNativeFromVM ttn(thread);
1772 ciEnv ci_env(task, system_dictionary_modification_counter);
1773 if (should_break) {
1774 ci_env.set_break_at_compile(true);
1775 }
1776 if (should_log) {
1777 ci_env.set_log(thread->log());
1778 }
1779 assert(thread->env() == &ci_env, "set by ci_env");
1780 // The thread-env() field is cleared in ~CompileTaskWrapper.
1782 // Cache Jvmti state
1783 ci_env.cache_jvmti_state();
1785 // Cache DTrace flags
1786 ci_env.cache_dtrace_flags();
1788 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1790 TraceTime t1("compilation", &time);
1792 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1794 if (!ci_env.failing() && task->code() == NULL) {
1795 //assert(false, "compiler should always document failure");
1796 // The compiler elected, without comment, not to register a result.
1797 // Do not attempt further compilations of this method.
1798 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1799 }
1801 // Copy this bit to the enclosing block:
1802 compilable = ci_env.compilable();
1804 if (ci_env.failing()) {
1805 const char* retry_message = ci_env.retry_message();
1806 if (_compilation_log != NULL) {
1807 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1808 }
1809 if (PrintCompilation) {
1810 tty->print("%4d COMPILE SKIPPED: %s", compile_id, ci_env.failure_reason());
1811 if (retry_message != NULL) {
1812 tty->print(" (%s)", retry_message);
1813 }
1814 tty->cr();
1815 }
1816 } else {
1817 task->mark_success();
1818 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1819 if (_compilation_log != NULL) {
1820 nmethod* code = task->code();
1821 if (code != NULL) {
1822 _compilation_log->log_nmethod(thread, code);
1823 }
1824 }
1825 }
1826 }
1827 pop_jni_handle_block();
1829 methodHandle method(thread, task->method());
1831 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1833 collect_statistics(thread, time, task);
1835 if (PrintCompilation && PrintCompilation2) {
1836 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1837 tty->print("%4d ", compile_id); // print compilation number
1838 tty->print("%s ", (is_osr ? "%" : " "));
1839 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size();
1840 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes());
1841 }
1843 if (compilable == ciEnv::MethodCompilable_never) {
1844 if (is_osr) {
1845 method->set_not_osr_compilable();
1846 } else {
1847 method->set_not_compilable_quietly();
1848 }
1849 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1850 method->set_not_compilable_quietly(task->comp_level());
1851 }
1853 // Note that the queued_for_compilation bits are cleared without
1854 // protection of a mutex. [They were set by the requester thread,
1855 // when adding the task to the complie queue -- at which time the
1856 // compile queue lock was held. Subsequently, we acquired the compile
1857 // queue lock to get this task off the compile queue; thus (to belabour
1858 // the point somewhat) our clearing of the bits must be occurring
1859 // only after the setting of the bits. See also 14012000 above.
1860 method->clear_queued_for_compilation();
1862 #ifdef ASSERT
1863 if (CollectedHeap::fired_fake_oom()) {
1864 // The current compile received a fake OOM during compilation so
1865 // go ahead and exit the VM since the test apparently succeeded
1866 tty->print_cr("*** Shutting down VM after successful fake OOM");
1867 vm_exit(0);
1868 }
1869 #endif
1870 }
1872 // ------------------------------------------------------------------
1873 // CompileBroker::handle_full_code_cache
1874 //
1875 // The CodeCache is full. Print out warning and disable compilation or
1876 // try code cache cleaning so compilation can continue later.
1877 void CompileBroker::handle_full_code_cache() {
1878 UseInterpreter = true;
1879 if (UseCompiler || AlwaysCompileLoopMethods ) {
1880 if (xtty != NULL) {
1881 stringStream s;
1882 // Dump code cache state into a buffer before locking the tty,
1883 // because log_state() will use locks causing lock conflicts.
1884 CodeCache::log_state(&s);
1885 // Lock to prevent tearing
1886 ttyLocker ttyl;
1887 xtty->begin_elem("code_cache_full");
1888 xtty->print(s.as_string());
1889 xtty->stamp();
1890 xtty->end_elem();
1891 }
1892 warning("CodeCache is full. Compiler has been disabled.");
1893 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1894 CodeCache::print_bounds(tty);
1895 #ifndef PRODUCT
1896 if (CompileTheWorld || ExitOnFullCodeCache) {
1897 before_exit(JavaThread::current());
1898 exit_globals(); // will delete tty
1899 vm_direct_exit(CompileTheWorld ? 0 : 1);
1900 }
1901 #endif
1902 if (UseCodeCacheFlushing) {
1903 NMethodSweeper::handle_full_code_cache(true);
1904 } else {
1905 UseCompiler = false;
1906 AlwaysCompileLoopMethods = false;
1907 }
1908 }
1909 }
1911 // ------------------------------------------------------------------
1912 // CompileBroker::set_last_compile
1913 //
1914 // Record this compilation for debugging purposes.
1915 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1916 ResourceMark rm;
1917 char* method_name = method->name()->as_C_string();
1918 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1919 char current_method[CompilerCounters::cmname_buffer_length];
1920 size_t maxLen = CompilerCounters::cmname_buffer_length;
1922 if (UsePerfData) {
1923 const char* class_name = method->method_holder()->name()->as_C_string();
1925 size_t s1len = strlen(class_name);
1926 size_t s2len = strlen(method_name);
1928 // check if we need to truncate the string
1929 if (s1len + s2len + 2 > maxLen) {
1931 // the strategy is to lop off the leading characters of the
1932 // class name and the trailing characters of the method name.
1934 if (s2len + 2 > maxLen) {
1935 // lop of the entire class name string, let snprintf handle
1936 // truncation of the method name.
1937 class_name += s1len; // null string
1938 }
1939 else {
1940 // lop off the extra characters from the front of the class name
1941 class_name += ((s1len + s2len + 2) - maxLen);
1942 }
1943 }
1945 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1946 }
1948 if (CICountOSR && is_osr) {
1949 _last_compile_type = osr_compile;
1950 } else {
1951 _last_compile_type = normal_compile;
1952 }
1953 _last_compile_level = comp_level;
1955 if (UsePerfData) {
1956 CompilerCounters* counters = thread->counters();
1957 counters->set_current_method(current_method);
1958 counters->set_compile_type((jlong)_last_compile_type);
1959 }
1960 }
1963 // ------------------------------------------------------------------
1964 // CompileBroker::push_jni_handle_block
1965 //
1966 // Push on a new block of JNI handles.
1967 void CompileBroker::push_jni_handle_block() {
1968 JavaThread* thread = JavaThread::current();
1970 // Allocate a new block for JNI handles.
1971 // Inlined code from jni_PushLocalFrame()
1972 JNIHandleBlock* java_handles = thread->active_handles();
1973 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1974 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1975 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1976 thread->set_active_handles(compile_handles);
1977 }
1980 // ------------------------------------------------------------------
1981 // CompileBroker::pop_jni_handle_block
1982 //
1983 // Pop off the current block of JNI handles.
1984 void CompileBroker::pop_jni_handle_block() {
1985 JavaThread* thread = JavaThread::current();
1987 // Release our JNI handle block
1988 JNIHandleBlock* compile_handles = thread->active_handles();
1989 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1990 thread->set_active_handles(java_handles);
1991 compile_handles->set_pop_frame_link(NULL);
1992 JNIHandleBlock::release_block(compile_handles, thread); // may block
1993 }
1996 // ------------------------------------------------------------------
1997 // CompileBroker::check_break_at
1998 //
1999 // Should the compilation break at the current compilation.
2000 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2001 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2002 return true;
2003 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2004 return true;
2005 } else {
2006 return (compile_id == CIBreakAt);
2007 }
2008 }
2010 // ------------------------------------------------------------------
2011 // CompileBroker::collect_statistics
2012 //
2013 // Collect statistics about the compilation.
2015 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2016 bool success = task->is_success();
2017 methodHandle method (thread, task->method());
2018 uint compile_id = task->compile_id();
2019 bool is_osr = (task->osr_bci() != standard_entry_bci);
2020 nmethod* code = task->code();
2021 CompilerCounters* counters = thread->counters();
2023 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2024 MutexLocker locker(CompileStatistics_lock);
2026 // _perf variables are production performance counters which are
2027 // updated regardless of the setting of the CITime and CITimeEach flags
2028 //
2029 if (!success) {
2030 _total_bailout_count++;
2031 if (UsePerfData) {
2032 _perf_last_failed_method->set_value(counters->current_method());
2033 _perf_last_failed_type->set_value(counters->compile_type());
2034 _perf_total_bailout_count->inc();
2035 }
2036 } else if (code == NULL) {
2037 if (UsePerfData) {
2038 _perf_last_invalidated_method->set_value(counters->current_method());
2039 _perf_last_invalidated_type->set_value(counters->compile_type());
2040 _perf_total_invalidated_count->inc();
2041 }
2042 _total_invalidated_count++;
2043 } else {
2044 // Compilation succeeded
2046 // update compilation ticks - used by the implementation of
2047 // java.lang.management.CompilationMBean
2048 _perf_total_compilation->inc(time.ticks());
2050 if (CITime) {
2051 _t_total_compilation.add(time);
2052 if (is_osr) {
2053 _t_osr_compilation.add(time);
2054 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2055 } else {
2056 _t_standard_compilation.add(time);
2057 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2058 }
2059 }
2061 if (UsePerfData) {
2062 // save the name of the last method compiled
2063 _perf_last_method->set_value(counters->current_method());
2064 _perf_last_compile_type->set_value(counters->compile_type());
2065 _perf_last_compile_size->set_value(method->code_size() +
2066 task->num_inlined_bytecodes());
2067 if (is_osr) {
2068 _perf_osr_compilation->inc(time.ticks());
2069 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2070 } else {
2071 _perf_standard_compilation->inc(time.ticks());
2072 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2073 }
2074 }
2076 if (CITimeEach) {
2077 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2078 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2079 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2080 }
2082 // Collect counts of successful compilations
2083 _sum_nmethod_size += code->total_size();
2084 _sum_nmethod_code_size += code->insts_size();
2085 _total_compile_count++;
2087 if (UsePerfData) {
2088 _perf_sum_nmethod_size->inc( code->total_size());
2089 _perf_sum_nmethod_code_size->inc(code->insts_size());
2090 _perf_total_compile_count->inc();
2091 }
2093 if (is_osr) {
2094 if (UsePerfData) _perf_total_osr_compile_count->inc();
2095 _total_osr_compile_count++;
2096 } else {
2097 if (UsePerfData) _perf_total_standard_compile_count->inc();
2098 _total_standard_compile_count++;
2099 }
2100 }
2101 // set the current method for the thread to null
2102 if (UsePerfData) counters->set_current_method("");
2103 }
2107 void CompileBroker::print_times() {
2108 tty->cr();
2109 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2110 tty->print_cr("------------------------------------------------");
2111 //0000000000111111111122222222223333333333444444444455555555556666666666
2112 //0123456789012345678901234567890123456789012345678901234567890123456789
2113 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2114 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2115 CompileBroker::_t_standard_compilation.seconds(),
2116 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2117 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);
2119 if (compiler(CompLevel_simple) != NULL) {
2120 compiler(CompLevel_simple)->print_timers();
2121 }
2122 if (compiler(CompLevel_full_optimization) != NULL) {
2123 compiler(CompLevel_full_optimization)->print_timers();
2124 }
2125 tty->cr();
2126 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2127 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2128 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2129 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2130 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2131 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2132 tty->cr();
2133 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2134 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2135 }
2138 // Debugging output for failure
2139 void CompileBroker::print_last_compile() {
2140 if ( _last_compile_level != CompLevel_none &&
2141 compiler(_last_compile_level) != NULL &&
2142 _last_method_compiled != NULL &&
2143 _last_compile_type != no_compile) {
2144 if (_last_compile_type == osr_compile) {
2145 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2146 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2147 } else {
2148 tty->print_cr("Last parse: %d+++(%d) %s",
2149 _compilation_id, _last_compile_level, _last_method_compiled);
2150 }
2151 }
2152 }
2155 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2156 #ifndef PRODUCT
2157 st->print_cr("Compiler thread printing unimplemented.");
2158 st->cr();
2159 #endif
2160 }