1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/systemDictionary.hpp"
27 #include "classfile/vmSymbols.hpp"
28 #include "code/codeCache.hpp"
29 #include "compiler/compileBroker.hpp"
30 #include "compiler/compileLog.hpp"
31 #include "compiler/compilerOracle.hpp"
32 #include "interpreter/linkResolver.hpp"
33 #include "memory/allocation.inline.hpp"
34 #include "oops/methodData.hpp"
35 #include "oops/method.hpp"
36 #include "oops/oop.inline.hpp"
37 #include "prims/nativeLookup.hpp"
38 #include "runtime/arguments.hpp"
39 #include "runtime/compilationPolicy.hpp"
40 #include "runtime/init.hpp"
41 #include "runtime/interfaceSupport.hpp"
42 #include "runtime/javaCalls.hpp"
43 #include "runtime/os.hpp"
44 #include "runtime/sharedRuntime.hpp"
45 #include "runtime/sweeper.hpp"
46 #include "trace/tracing.hpp"
47 #include "utilities/dtrace.hpp"
48 #include "utilities/events.hpp"
49 #ifdef COMPILER1
50 #include "c1/c1_Compiler.hpp"
51 #endif
52 #ifdef COMPILER2
53 #include "opto/c2compiler.hpp"
54 #endif
55 #ifdef SHARK
56 #include "shark/sharkCompiler.hpp"
57 #endif
58
59 #ifdef DTRACE_ENABLED
60
61 // Only bother with this argument setup if dtrace is available
62
63 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
64 { \
65 Symbol* klass_name = (method)->klass_name(); \
66 Symbol* name = (method)->name(); \
67 Symbol* signature = (method)->signature(); \
68 HOTSPOT_METHOD_COMPILE_BEGIN( \
69 (char *) comp_name, strlen(comp_name), \
70 (char *) klass_name->bytes(), klass_name->utf8_length(), \
71 (char *) name->bytes(), name->utf8_length(), \
72 (char *) signature->bytes(), signature->utf8_length()); \
73 }
74
75 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
76 { \
77 Symbol* klass_name = (method)->klass_name(); \
78 Symbol* name = (method)->name(); \
79 Symbol* signature = (method)->signature(); \
80 HOTSPOT_METHOD_COMPILE_END( \
81 (char *) comp_name, strlen(comp_name), \
82 (char *) klass_name->bytes(), klass_name->utf8_length(), \
83 (char *) name->bytes(), name->utf8_length(), \
84 (char *) signature->bytes(), signature->utf8_length(), (success)); \
85 }
86
87 #else // ndef DTRACE_ENABLED
88
89 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
90 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
91
92 #endif // ndef DTRACE_ENABLED
93
94 bool CompileBroker::_initialized = false;
95 volatile bool CompileBroker::_should_block = false;
96 volatile jint CompileBroker::_print_compilation_warning = 0;
97 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
98
99 // The installed compiler(s)
100 AbstractCompiler* CompileBroker::_compilers[2];
101
102 // These counters are used to assign an unique ID to each compilation.
103 volatile jint CompileBroker::_compilation_id = 0;
104 volatile jint CompileBroker::_osr_compilation_id = 0;
105
106 // Debugging information
107 int CompileBroker::_last_compile_type = no_compile;
108 int CompileBroker::_last_compile_level = CompLevel_none;
109 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
110
111 // Performance counters
112 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
113 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
114 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
115
116 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
117 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
118 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
119 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
120 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
121
122 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
123 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
124 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
125 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
126
127 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
128 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
129 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
130 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
131 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
132 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
133 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
134
135 // Timers and counters for generating statistics
136 elapsedTimer CompileBroker::_t_total_compilation;
137 elapsedTimer CompileBroker::_t_osr_compilation;
138 elapsedTimer CompileBroker::_t_standard_compilation;
139
140 int CompileBroker::_total_bailout_count = 0;
141 int CompileBroker::_total_invalidated_count = 0;
142 int CompileBroker::_total_compile_count = 0;
143 int CompileBroker::_total_osr_compile_count = 0;
144 int CompileBroker::_total_standard_compile_count = 0;
145
146 int CompileBroker::_sum_osr_bytes_compiled = 0;
147 int CompileBroker::_sum_standard_bytes_compiled = 0;
148 int CompileBroker::_sum_nmethod_size = 0;
149 int CompileBroker::_sum_nmethod_code_size = 0;
150
151 long CompileBroker::_peak_compilation_time = 0;
152
153 CompileQueue* CompileBroker::_c2_method_queue = NULL;
154 CompileQueue* CompileBroker::_c1_method_queue = NULL;
155 CompileTask* CompileBroker::_task_free_list = NULL;
156
157 GrowableArray<CompilerThread*>* CompileBroker::_compiler_threads = NULL;
158
159
160 class CompilationLog : public StringEventLog {
161 public:
162 CompilationLog() : StringEventLog("Compilation events") {
163 }
164
165 void log_compile(JavaThread* thread, CompileTask* task) {
166 StringLogMessage lm;
167 stringStream sstr = lm.stream();
168 // msg.time_stamp().update_to(tty->time_stamp().ticks());
169 task->print_compilation(&sstr, NULL, true);
170 log(thread, "%s", (const char*)lm);
171 }
172
173 void log_nmethod(JavaThread* thread, nmethod* nm) {
174 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
175 nm->compile_id(), nm->is_osr_method() ? "%" : "",
176 nm, nm->code_begin(), nm->code_end());
177 }
178
179 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
180 StringLogMessage lm;
181 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
182 if (retry_message != NULL) {
183 lm.append(" (%s)", retry_message);
184 }
185 lm.print("\n");
186 log(thread, "%s", (const char*)lm);
187 }
188 };
189
190 static CompilationLog* _compilation_log = NULL;
191
192 void compileBroker_init() {
193 if (LogEvents) {
194 _compilation_log = new CompilationLog();
195 }
196 }
197
198 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
199 CompilerThread* thread = CompilerThread::current();
200 thread->set_task(task);
201 CompileLog* log = thread->log();
202 if (log != NULL) task->log_task_start(log);
203 }
204
205 CompileTaskWrapper::~CompileTaskWrapper() {
206 CompilerThread* thread = CompilerThread::current();
207 CompileTask* task = thread->task();
208 CompileLog* log = thread->log();
209 if (log != NULL) task->log_task_done(log);
210 thread->set_task(NULL);
211 task->set_code_handle(NULL);
212 thread->set_env(NULL);
213 if (task->is_blocking()) {
214 MutexLocker notifier(task->lock(), thread);
215 task->mark_complete();
216 // Notify the waiting thread that the compilation has completed.
217 task->lock()->notify_all();
218 } else {
219 task->mark_complete();
220
221 // By convention, the compiling thread is responsible for
222 // recycling a non-blocking CompileTask.
223 CompileBroker::free_task(task);
224 }
225 }
226
227
228 // ------------------------------------------------------------------
229 // CompileTask::initialize
230 void CompileTask::initialize(int compile_id,
231 methodHandle method,
232 int osr_bci,
233 int comp_level,
234 methodHandle hot_method,
235 int hot_count,
236 const char* comment,
237 bool is_blocking) {
238 assert(!_lock->is_locked(), "bad locking");
239
240 _compile_id = compile_id;
241 _method = method();
242 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
243 _osr_bci = osr_bci;
244 _is_blocking = is_blocking;
245 _comp_level = comp_level;
246 _num_inlined_bytecodes = 0;
247
248 _is_complete = false;
249 _is_success = false;
250 _code_handle = NULL;
251
252 _hot_method = NULL;
253 _hot_method_holder = NULL;
254 _hot_count = hot_count;
255 _time_queued = 0; // tidy
256 _comment = comment;
257
258 if (LogCompilation) {
259 _time_queued = os::elapsed_counter();
260 if (hot_method.not_null()) {
261 if (hot_method == method) {
262 _hot_method = _method;
263 } else {
264 _hot_method = hot_method();
265 // only add loader or mirror if different from _method_holder
266 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
267 }
268 }
269 }
270
271 _next = NULL;
272 }
273
274 // ------------------------------------------------------------------
275 // CompileTask::code/set_code
276 nmethod* CompileTask::code() const {
277 if (_code_handle == NULL) return NULL;
278 return _code_handle->code();
279 }
280 void CompileTask::set_code(nmethod* nm) {
281 if (_code_handle == NULL && nm == NULL) return;
282 guarantee(_code_handle != NULL, "");
283 _code_handle->set_code(nm);
284 if (nm == NULL) _code_handle = NULL; // drop the handle also
285 }
286
287 // ------------------------------------------------------------------
288 // CompileTask::free
289 void CompileTask::free() {
290 set_code(NULL);
291 assert(!_lock->is_locked(), "Should not be locked when freed");
292 JNIHandles::destroy_global(_method_holder);
293 JNIHandles::destroy_global(_hot_method_holder);
294 }
295
296
297 void CompileTask::mark_on_stack() {
298 // Mark these methods as something redefine classes cannot remove.
299 _method->set_on_stack(true);
300 if (_hot_method != NULL) {
301 _hot_method->set_on_stack(true);
302 }
303 }
304
305 // ------------------------------------------------------------------
306 // CompileTask::print
307 void CompileTask::print() {
308 tty->print("<CompileTask compile_id=%d ", _compile_id);
309 tty->print("method=");
310 _method->print_name(tty);
311 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
312 _osr_bci, bool_to_str(_is_blocking),
313 bool_to_str(_is_complete), bool_to_str(_is_success));
314 }
315
316
317 // ------------------------------------------------------------------
318 // CompileTask::print_line_on_error
319 //
320 // This function is called by fatal error handler when the thread
321 // causing troubles is a compiler thread.
322 //
323 // Do not grab any lock, do not allocate memory.
324 //
325 // Otherwise it's the same as CompileTask::print_line()
326 //
327 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
328 // print compiler name
329 st->print("%s:", CompileBroker::compiler_name(comp_level()));
330 print_compilation(st);
331 }
332
333 // ------------------------------------------------------------------
334 // CompileTask::print_line
335 void CompileTask::print_line() {
336 ttyLocker ttyl; // keep the following output all in one block
337 // print compiler name if requested
338 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
339 print_compilation();
340 }
341
342
343 // ------------------------------------------------------------------
344 // CompileTask::print_compilation_impl
345 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
346 bool is_osr_method, int osr_bci, bool is_blocking,
347 const char* msg, bool short_form) {
348 if (!short_form) {
349 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
350 }
351 st->print("%4d ", compile_id); // print compilation number
352
353 // For unloaded methods the transition to zombie occurs after the
354 // method is cleared so it's impossible to report accurate
355 // information for that case.
356 bool is_synchronized = false;
357 bool has_exception_handler = false;
358 bool is_native = false;
359 if (method != NULL) {
360 is_synchronized = method->is_synchronized();
361 has_exception_handler = method->has_exception_handler();
362 is_native = method->is_native();
363 }
364 // method attributes
365 const char compile_type = is_osr_method ? '%' : ' ';
366 const char sync_char = is_synchronized ? 's' : ' ';
367 const char exception_char = has_exception_handler ? '!' : ' ';
368 const char blocking_char = is_blocking ? 'b' : ' ';
369 const char native_char = is_native ? 'n' : ' ';
370
371 // print method attributes
372 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
373
374 if (TieredCompilation) {
375 if (comp_level != -1) st->print("%d ", comp_level);
376 else st->print("- ");
377 }
378 st->print(" "); // more indent
379
380 if (method == NULL) {
381 st->print("(method)");
382 } else {
383 method->print_short_name(st);
384 if (is_osr_method) {
385 st->print(" @ %d", osr_bci);
386 }
387 if (method->is_native())
388 st->print(" (native)");
389 else
390 st->print(" (%d bytes)", method->code_size());
391 }
392
393 if (msg != NULL) {
394 st->print(" %s", msg);
395 }
396 if (!short_form) {
397 st->cr();
398 }
399 }
400
401 // ------------------------------------------------------------------
402 // CompileTask::print_inlining
403 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
404 // 1234567
405 st->print(" "); // print timestamp
406 // 1234
407 st->print(" "); // print compilation number
408
409 // method attributes
410 if (method->is_loaded()) {
411 const char sync_char = method->is_synchronized() ? 's' : ' ';
412 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
413 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
414
415 // print method attributes
416 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
417 } else {
418 // %s!bn
419 st->print(" "); // print method attributes
420 }
421
422 if (TieredCompilation) {
423 st->print(" ");
424 }
425 st->print(" "); // more indent
426 st->print(" "); // initial inlining indent
427
428 for (int i = 0; i < inline_level; i++) st->print(" ");
429
430 st->print("@ %d ", bci); // print bci
431 method->print_short_name(st);
432 if (method->is_loaded())
433 st->print(" (%d bytes)", method->code_size());
434 else
435 st->print(" (not loaded)");
436
437 if (msg != NULL) {
438 st->print(" %s", msg);
439 }
440 st->cr();
441 }
442
443 // ------------------------------------------------------------------
444 // CompileTask::print_inline_indent
445 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
446 // 1234567
447 st->print(" "); // print timestamp
448 // 1234
449 st->print(" "); // print compilation number
450 // %s!bn
451 st->print(" "); // print method attributes
452 if (TieredCompilation) {
453 st->print(" ");
454 }
455 st->print(" "); // more indent
456 st->print(" "); // initial inlining indent
457 for (int i = 0; i < inline_level; i++) st->print(" ");
458 }
459
460 // ------------------------------------------------------------------
461 // CompileTask::print_compilation
462 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
463 bool is_osr_method = osr_bci() != InvocationEntryBci;
464 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
465 }
466
467 // ------------------------------------------------------------------
468 // CompileTask::log_task
469 void CompileTask::log_task(xmlStream* log) {
470 Thread* thread = Thread::current();
471 methodHandle method(thread, this->method());
472 ResourceMark rm(thread);
473
474 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
475 log->print(" compile_id='%d'", _compile_id);
476 if (_osr_bci != CompileBroker::standard_entry_bci) {
477 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
478 } // else compile_kind='c2c'
479 if (!method.is_null()) log->method(method);
480 if (_osr_bci != CompileBroker::standard_entry_bci) {
481 log->print(" osr_bci='%d'", _osr_bci);
482 }
483 if (_comp_level != CompLevel_highest_tier) {
484 log->print(" level='%d'", _comp_level);
485 }
486 if (_is_blocking) {
487 log->print(" blocking='1'");
488 }
489 log->stamp();
490 }
491
492
493 // ------------------------------------------------------------------
494 // CompileTask::log_task_queued
495 void CompileTask::log_task_queued() {
496 Thread* thread = Thread::current();
497 ttyLocker ttyl;
498 ResourceMark rm(thread);
499
500 xtty->begin_elem("task_queued");
501 log_task(xtty);
502 if (_comment != NULL) {
503 xtty->print(" comment='%s'", _comment);
504 }
505 if (_hot_method != NULL) {
506 methodHandle hot(thread, _hot_method);
507 methodHandle method(thread, _method);
508 if (hot() != method()) {
509 xtty->method(hot);
510 }
511 }
512 if (_hot_count != 0) {
513 xtty->print(" hot_count='%d'", _hot_count);
514 }
515 xtty->end_elem();
516 }
517
518
519 // ------------------------------------------------------------------
520 // CompileTask::log_task_start
521 void CompileTask::log_task_start(CompileLog* log) {
522 log->begin_head("task");
523 log_task(log);
524 log->end_head();
525 }
526
527
528 // ------------------------------------------------------------------
529 // CompileTask::log_task_done
530 void CompileTask::log_task_done(CompileLog* log) {
531 Thread* thread = Thread::current();
532 methodHandle method(thread, this->method());
533 ResourceMark rm(thread);
534
535 // <task_done ... stamp='1.234'> </task>
536 nmethod* nm = code();
537 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
538 _is_success, nm == NULL ? 0 : nm->content_size(),
539 method->invocation_count());
540 int bec = method->backedge_count();
541 if (bec != 0) log->print(" backedge_count='%d'", bec);
542 // Note: "_is_complete" is about to be set, but is not.
543 if (_num_inlined_bytecodes != 0) {
544 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
545 }
546 log->stamp();
547 log->end_elem();
548 log->tail("task");
549 log->clear_identities(); // next task will have different CI
550 if (log->unflushed_count() > 2000) {
551 log->flush();
552 }
553 log->mark_file_end();
554 }
555
556
557
558 // Add a CompileTask to a CompileQueue
559 void CompileQueue::add(CompileTask* task) {
560 assert(lock()->owned_by_self(), "must own lock");
561
562 task->set_next(NULL);
563 task->set_prev(NULL);
564
565 if (_last == NULL) {
566 // The compile queue is empty.
567 assert(_first == NULL, "queue is empty");
568 _first = task;
569 _last = task;
570 } else {
571 // Append the task to the queue.
572 assert(_last->next() == NULL, "not last");
573 _last->set_next(task);
574 task->set_prev(_last);
575 _last = task;
576 }
577 ++_size;
578
579 // Mark the method as being in the compile queue.
580 task->method()->set_queued_for_compilation();
581
582 if (CIPrintCompileQueue) {
583 print();
584 }
585
586 if (LogCompilation && xtty != NULL) {
587 task->log_task_queued();
588 }
589
590 // Notify CompilerThreads that a task is available.
591 lock()->notify_all();
592 }
593
594 void CompileQueue::delete_all() {
595 assert(lock()->owned_by_self(), "must own lock");
596 if (_first != NULL) {
597 for (CompileTask* task = _first; task != NULL; task = task->next()) {
598 delete task;
599 }
600 _first = NULL;
601 }
602 }
603
604 // ------------------------------------------------------------------
605 // CompileQueue::get
606 //
607 // Get the next CompileTask from a CompileQueue
608 CompileTask* CompileQueue::get() {
609 NMethodSweeper::possibly_sweep();
610
611 MutexLocker locker(lock());
612 // If _first is NULL we have no more compile jobs. There are two reasons for
613 // having no compile jobs: First, we compiled everything we wanted. Second,
614 // we ran out of code cache so compilation has been disabled. In the latter
615 // case we perform code cache sweeps to free memory such that we can re-enable
616 // compilation.
617 while (_first == NULL) {
618 // Exit loop if compilation is disabled forever
619 if (CompileBroker::is_compilation_disabled_forever()) {
620 return NULL;
621 }
622
623 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) {
624 // Wait a certain amount of time to possibly do another sweep.
625 // We must wait until stack scanning has happened so that we can
626 // transition a method's state from 'not_entrant' to 'zombie'.
627 long wait_time = NmethodSweepCheckInterval * 1000;
628 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) {
629 // Only one thread at a time can do sweeping. Scale the
630 // wait time according to the number of compiler threads.
631 // As a result, the next sweep is likely to happen every 100ms
632 // with an arbitrary number of threads that do sweeping.
633 wait_time = 100 * CICompilerCount;
634 }
635 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time);
636 if (timeout) {
637 MutexUnlocker ul(lock());
638 NMethodSweeper::possibly_sweep();
639 }
640 } else {
641 // If there are no compilation tasks and we can compile new jobs
642 // (i.e., there is enough free space in the code cache) there is
643 // no need to invoke the sweeper. As a result, the hotness of methods
644 // remains unchanged. This behavior is desired, since we want to keep
645 // the stable state, i.e., we do not want to evict methods from the
646 // code cache if it is unnecessary.
647 // We need a timed wait here, since compiler threads can exit if compilation
648 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
649 // is not critical and we do not want idle compiler threads to wake up too often.
650 lock()->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
651 }
652 }
653
654 if (CompileBroker::is_compilation_disabled_forever()) {
655 return NULL;
656 }
657
658 CompileTask* task = CompilationPolicy::policy()->select_task(this);
659 remove(task);
660 return task;
661 }
662
663 void CompileQueue::remove(CompileTask* task)
664 {
665 assert(lock()->owned_by_self(), "must own lock");
666 if (task->prev() != NULL) {
667 task->prev()->set_next(task->next());
668 } else {
669 // max is the first element
670 assert(task == _first, "Sanity");
671 _first = task->next();
672 }
673
674 if (task->next() != NULL) {
675 task->next()->set_prev(task->prev());
676 } else {
677 // max is the last element
678 assert(task == _last, "Sanity");
679 _last = task->prev();
680 }
681 --_size;
682 }
683
684 // methods in the compile queue need to be marked as used on the stack
685 // so that they don't get reclaimed by Redefine Classes
686 void CompileQueue::mark_on_stack() {
687 CompileTask* task = _first;
688 while (task != NULL) {
689 task->mark_on_stack();
690 task = task->next();
691 }
692 }
693
694 // ------------------------------------------------------------------
695 // CompileQueue::print
696 void CompileQueue::print() {
697 tty->print_cr("Contents of %s", name());
698 tty->print_cr("----------------------");
699 CompileTask* task = _first;
700 while (task != NULL) {
701 task->print_line();
702 task = task->next();
703 }
704 tty->print_cr("----------------------");
705 }
706
707 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
708
709 _current_method[0] = '\0';
710 _compile_type = CompileBroker::no_compile;
711
712 if (UsePerfData) {
713 ResourceMark rm;
714
715 // create the thread instance name space string - don't create an
716 // instance subspace if instance is -1 - keeps the adapterThread
717 // counters from having a ".0" namespace.
718 const char* thread_i = (instance == -1) ? thread_name :
719 PerfDataManager::name_space(thread_name, instance);
720
721
722 char* name = PerfDataManager::counter_name(thread_i, "method");
723 _perf_current_method =
724 PerfDataManager::create_string_variable(SUN_CI, name,
725 cmname_buffer_length,
726 _current_method, CHECK);
727
728 name = PerfDataManager::counter_name(thread_i, "type");
729 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
730 PerfData::U_None,
731 (jlong)_compile_type,
732 CHECK);
733
734 name = PerfDataManager::counter_name(thread_i, "time");
735 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
736 PerfData::U_Ticks, CHECK);
737
738 name = PerfDataManager::counter_name(thread_i, "compiles");
739 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
740 PerfData::U_Events, CHECK);
741 }
742 }
743
744 // ------------------------------------------------------------------
745 // CompileBroker::compilation_init
746 //
747 // Initialize the Compilation object
748 void CompileBroker::compilation_init() {
749 _last_method_compiled[0] = '\0';
750
751 // No need to initialize compilation system if we do not use it.
752 if (!UseCompiler) {
753 return;
754 }
755 #ifndef SHARK
756 // Set the interface to the current compiler(s).
757 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
758 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
759 #ifdef COMPILER1
760 if (c1_count > 0) {
761 _compilers[0] = new Compiler();
762 }
763 #endif // COMPILER1
764
765 #ifdef COMPILER2
766 if (c2_count > 0) {
767 _compilers[1] = new C2Compiler();
768 }
769 #endif // COMPILER2
770
771 #else // SHARK
772 int c1_count = 0;
773 int c2_count = 1;
774
775 _compilers[1] = new SharkCompiler();
776 #endif // SHARK
777
778 // Initialize the CompileTask free list
779 _task_free_list = NULL;
780
781 // Start the CompilerThreads
782 init_compiler_threads(c1_count, c2_count);
783 // totalTime performance counter is always created as it is required
784 // by the implementation of java.lang.management.CompilationMBean.
785 {
786 EXCEPTION_MARK;
787 _perf_total_compilation =
788 PerfDataManager::create_counter(JAVA_CI, "totalTime",
789 PerfData::U_Ticks, CHECK);
790 }
791
792
793 if (UsePerfData) {
794
795 EXCEPTION_MARK;
796
797 // create the jvmstat performance counters
798 _perf_osr_compilation =
799 PerfDataManager::create_counter(SUN_CI, "osrTime",
800 PerfData::U_Ticks, CHECK);
801
802 _perf_standard_compilation =
803 PerfDataManager::create_counter(SUN_CI, "standardTime",
804 PerfData::U_Ticks, CHECK);
805
806 _perf_total_bailout_count =
807 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
808 PerfData::U_Events, CHECK);
809
810 _perf_total_invalidated_count =
811 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
812 PerfData::U_Events, CHECK);
813
814 _perf_total_compile_count =
815 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
816 PerfData::U_Events, CHECK);
817 _perf_total_osr_compile_count =
818 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
819 PerfData::U_Events, CHECK);
820
821 _perf_total_standard_compile_count =
822 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
823 PerfData::U_Events, CHECK);
824
825 _perf_sum_osr_bytes_compiled =
826 PerfDataManager::create_counter(SUN_CI, "osrBytes",
827 PerfData::U_Bytes, CHECK);
828
829 _perf_sum_standard_bytes_compiled =
830 PerfDataManager::create_counter(SUN_CI, "standardBytes",
831 PerfData::U_Bytes, CHECK);
832
833 _perf_sum_nmethod_size =
834 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
835 PerfData::U_Bytes, CHECK);
836
837 _perf_sum_nmethod_code_size =
838 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
839 PerfData::U_Bytes, CHECK);
840
841 _perf_last_method =
842 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
843 CompilerCounters::cmname_buffer_length,
844 "", CHECK);
845
846 _perf_last_failed_method =
847 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
848 CompilerCounters::cmname_buffer_length,
849 "", CHECK);
850
851 _perf_last_invalidated_method =
852 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
853 CompilerCounters::cmname_buffer_length,
854 "", CHECK);
855
856 _perf_last_compile_type =
857 PerfDataManager::create_variable(SUN_CI, "lastType",
858 PerfData::U_None,
859 (jlong)CompileBroker::no_compile,
860 CHECK);
861
862 _perf_last_compile_size =
863 PerfDataManager::create_variable(SUN_CI, "lastSize",
864 PerfData::U_Bytes,
865 (jlong)CompileBroker::no_compile,
866 CHECK);
867
868
869 _perf_last_failed_type =
870 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
871 PerfData::U_None,
872 (jlong)CompileBroker::no_compile,
873 CHECK);
874
875 _perf_last_invalidated_type =
876 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
877 PerfData::U_None,
878 (jlong)CompileBroker::no_compile,
879 CHECK);
880 }
881
882 _initialized = true;
883 }
884
885
886 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
887 AbstractCompiler* comp, TRAPS) {
888 CompilerThread* compiler_thread = NULL;
889
890 Klass* k =
891 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
892 true, CHECK_0);
893 instanceKlassHandle klass (THREAD, k);
894 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
895 Handle string = java_lang_String::create_from_str(name, CHECK_0);
896
897 // Initialize thread_oop to put it into the system threadGroup
898 Handle thread_group (THREAD, Universe::system_thread_group());
899 JavaValue result(T_VOID);
900 JavaCalls::call_special(&result, thread_oop,
901 klass,
902 vmSymbols::object_initializer_name(),
903 vmSymbols::threadgroup_string_void_signature(),
904 thread_group,
905 string,
906 CHECK_0);
907
908 {
909 MutexLocker mu(Threads_lock, THREAD);
910 compiler_thread = new CompilerThread(queue, counters);
911 // At this point the new CompilerThread data-races with this startup
912 // thread (which I believe is the primoridal thread and NOT the VM
913 // thread). This means Java bytecodes being executed at startup can
914 // queue compile jobs which will run at whatever default priority the
915 // newly created CompilerThread runs at.
916
917
918 // At this point it may be possible that no osthread was created for the
919 // JavaThread due to lack of memory. We would have to throw an exception
920 // in that case. However, since this must work and we do not allow
921 // exceptions anyway, check and abort if this fails.
922
923 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
924 vm_exit_during_initialization("java.lang.OutOfMemoryError",
925 os::native_thread_creation_failed_msg());
926 }
927
928 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
929
930 // Note that this only sets the JavaThread _priority field, which by
931 // definition is limited to Java priorities and not OS priorities.
932 // The os-priority is set in the CompilerThread startup code itself
933
934 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
935
936 // Note that we cannot call os::set_priority because it expects Java
937 // priorities and we are *explicitly* using OS priorities so that it's
938 // possible to set the compiler thread priority higher than any Java
939 // thread.
940
941 int native_prio = CompilerThreadPriority;
942 if (native_prio == -1) {
943 if (UseCriticalCompilerThreadPriority) {
944 native_prio = os::java_to_os_priority[CriticalPriority];
945 } else {
946 native_prio = os::java_to_os_priority[NearMaxPriority];
947 }
948 }
949 os::set_native_priority(compiler_thread, native_prio);
950
951 java_lang_Thread::set_daemon(thread_oop());
952
953 compiler_thread->set_threadObj(thread_oop());
954 compiler_thread->set_compiler(comp);
955 Threads::add(compiler_thread);
956 Thread::start(compiler_thread);
957 }
958
959 // Let go of Threads_lock before yielding
960 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
961
962 return compiler_thread;
963 }
964
965
966 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
967 EXCEPTION_MARK;
968 #if !defined(ZERO) && !defined(SHARK)
969 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
970 #endif // !ZERO && !SHARK
971 // Initialize the compilation queue
972 if (c2_compiler_count > 0) {
973 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
974 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
975 }
976 if (c1_compiler_count > 0) {
977 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
978 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
979 }
980
981 int compiler_count = c1_compiler_count + c2_compiler_count;
982
983 _compiler_threads =
984 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
985
986 char name_buffer[256];
987 for (int i = 0; i < c2_compiler_count; i++) {
988 // Create a name for our thread.
989 sprintf(name_buffer, "C2 CompilerThread%d", i);
990 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
991 // Shark and C2
992 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, _compilers[1], CHECK);
993 _compiler_threads->append(new_thread);
994 }
995
996 for (int i = c2_compiler_count; i < compiler_count; i++) {
997 // Create a name for our thread.
998 sprintf(name_buffer, "C1 CompilerThread%d", i);
999 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1000 // C1
1001 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, _compilers[0], CHECK);
1002 _compiler_threads->append(new_thread);
1003 }
1004
1005 if (UsePerfData) {
1006 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
1007 }
1008 }
1009
1010
1011 // Set the methods on the stack as on_stack so that redefine classes doesn't
1012 // reclaim them
1013 void CompileBroker::mark_on_stack() {
1014 if (_c2_method_queue != NULL) {
1015 _c2_method_queue->mark_on_stack();
1016 }
1017 if (_c1_method_queue != NULL) {
1018 _c1_method_queue->mark_on_stack();
1019 }
1020 }
1021
1022 // ------------------------------------------------------------------
1023 // CompileBroker::compile_method
1024 //
1025 // Request compilation of a method.
1026 void CompileBroker::compile_method_base(methodHandle method,
1027 int osr_bci,
1028 int comp_level,
1029 methodHandle hot_method,
1030 int hot_count,
1031 const char* comment,
1032 Thread* thread) {
1033 // do nothing if compiler thread(s) is not available
1034 if (!_initialized ) {
1035 return;
1036 }
1037
1038 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1039 assert(method->method_holder()->oop_is_instance(),
1040 "sanity check");
1041 assert(!method->method_holder()->is_not_initialized(),
1042 "method holder must be initialized");
1043 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1044
1045 if (CIPrintRequests) {
1046 tty->print("request: ");
1047 method->print_short_name(tty);
1048 if (osr_bci != InvocationEntryBci) {
1049 tty->print(" osr_bci: %d", osr_bci);
1050 }
1051 tty->print(" comment: %s count: %d", comment, hot_count);
1052 if (!hot_method.is_null()) {
1053 tty->print(" hot: ");
1054 if (hot_method() != method()) {
1055 hot_method->print_short_name(tty);
1056 } else {
1057 tty->print("yes");
1058 }
1059 }
1060 tty->cr();
1061 }
1062
1063 // A request has been made for compilation. Before we do any
1064 // real work, check to see if the method has been compiled
1065 // in the meantime with a definitive result.
1066 if (compilation_is_complete(method, osr_bci, comp_level)) {
1067 return;
1068 }
1069
1070 #ifndef PRODUCT
1071 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1072 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1073 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1074 return;
1075 }
1076 }
1077 #endif
1078
1079 // If this method is already in the compile queue, then
1080 // we do not block the current thread.
1081 if (compilation_is_in_queue(method, osr_bci)) {
1082 // We may want to decay our counter a bit here to prevent
1083 // multiple denied requests for compilation. This is an
1084 // open compilation policy issue. Note: The other possibility,
1085 // in the case that this is a blocking compile request, is to have
1086 // all subsequent blocking requesters wait for completion of
1087 // ongoing compiles. Note that in this case we'll need a protocol
1088 // for freeing the associated compile tasks. [Or we could have
1089 // a single static monitor on which all these waiters sleep.]
1090 return;
1091 }
1092
1093 // If the requesting thread is holding the pending list lock
1094 // then we just return. We can't risk blocking while holding
1095 // the pending list lock or a 3-way deadlock may occur
1096 // between the reference handler thread, a GC (instigated
1097 // by a compiler thread), and compiled method registration.
1098 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1099 return;
1100 }
1101
1102 // Outputs from the following MutexLocker block:
1103 CompileTask* task = NULL;
1104 bool blocking = false;
1105 CompileQueue* queue = compile_queue(comp_level);
1106
1107 // Acquire our lock.
1108 {
1109 MutexLocker locker(queue->lock(), thread);
1110
1111 // Make sure the method has not slipped into the queues since
1112 // last we checked; note that those checks were "fast bail-outs".
1113 // Here we need to be more careful, see 14012000 below.
1114 if (compilation_is_in_queue(method, osr_bci)) {
1115 return;
1116 }
1117
1118 // We need to check again to see if the compilation has
1119 // completed. A previous compilation may have registered
1120 // some result.
1121 if (compilation_is_complete(method, osr_bci, comp_level)) {
1122 return;
1123 }
1124
1125 // We now know that this compilation is not pending, complete,
1126 // or prohibited. Assign a compile_id to this compilation
1127 // and check to see if it is in our [Start..Stop) range.
1128 int compile_id = assign_compile_id(method, osr_bci);
1129 if (compile_id == 0) {
1130 // The compilation falls outside the allowed range.
1131 return;
1132 }
1133
1134 // Should this thread wait for completion of the compile?
1135 blocking = is_compile_blocking(method, osr_bci);
1136
1137 // We will enter the compilation in the queue.
1138 // 14012000: Note that this sets the queued_for_compile bits in
1139 // the target method. We can now reason that a method cannot be
1140 // queued for compilation more than once, as follows:
1141 // Before a thread queues a task for compilation, it first acquires
1142 // the compile queue lock, then checks if the method's queued bits
1143 // are set or it has already been compiled. Thus there can not be two
1144 // instances of a compilation task for the same method on the
1145 // compilation queue. Consider now the case where the compilation
1146 // thread has already removed a task for that method from the queue
1147 // and is in the midst of compiling it. In this case, the
1148 // queued_for_compile bits must be set in the method (and these
1149 // will be visible to the current thread, since the bits were set
1150 // under protection of the compile queue lock, which we hold now.
1151 // When the compilation completes, the compiler thread first sets
1152 // the compilation result and then clears the queued_for_compile
1153 // bits. Neither of these actions are protected by a barrier (or done
1154 // under the protection of a lock), so the only guarantee we have
1155 // (on machines with TSO (Total Store Order)) is that these values
1156 // will update in that order. As a result, the only combinations of
1157 // these bits that the current thread will see are, in temporal order:
1158 // <RESULT, QUEUE> :
1159 // <0, 1> : in compile queue, but not yet compiled
1160 // <1, 1> : compiled but queue bit not cleared
1161 // <1, 0> : compiled and queue bit cleared
1162 // Because we first check the queue bits then check the result bits,
1163 // we are assured that we cannot introduce a duplicate task.
1164 // Note that if we did the tests in the reverse order (i.e. check
1165 // result then check queued bit), we could get the result bit before
1166 // the compilation completed, and the queue bit after the compilation
1167 // completed, and end up introducing a "duplicate" (redundant) task.
1168 // In that case, the compiler thread should first check if a method
1169 // has already been compiled before trying to compile it.
1170 // NOTE: in the event that there are multiple compiler threads and
1171 // there is de-optimization/recompilation, things will get hairy,
1172 // and in that case it's best to protect both the testing (here) of
1173 // these bits, and their updating (here and elsewhere) under a
1174 // common lock.
1175 task = create_compile_task(queue,
1176 compile_id, method,
1177 osr_bci, comp_level,
1178 hot_method, hot_count, comment,
1179 blocking);
1180 }
1181
1182 if (blocking) {
1183 wait_for_completion(task);
1184 }
1185 }
1186
1187
1188 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1189 int comp_level,
1190 methodHandle hot_method, int hot_count,
1191 const char* comment, Thread* THREAD) {
1192 // make sure arguments make sense
1193 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1194 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1195 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1196 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1197 // allow any levels for WhiteBox
1198 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1199 // return quickly if possible
1200
1201 // lock, make sure that the compilation
1202 // isn't prohibited in a straightforward way.
1203 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1204 if (comp == NULL || !comp->can_compile_method(method) ||
1205 compilation_is_prohibited(method, osr_bci, comp_level)) {
1206 return NULL;
1207 }
1208
1209 if (osr_bci == InvocationEntryBci) {
1210 // standard compilation
1211 nmethod* method_code = method->code();
1212 if (method_code != NULL) {
1213 if (compilation_is_complete(method, osr_bci, comp_level)) {
1214 return method_code;
1215 }
1216 }
1217 if (method->is_not_compilable(comp_level)) {
1218 return NULL;
1219 }
1220 } else {
1221 // osr compilation
1222 #ifndef TIERED
1223 // seems like an assert of dubious value
1224 assert(comp_level == CompLevel_highest_tier,
1225 "all OSR compiles are assumed to be at a single compilation lavel");
1226 #endif // TIERED
1227 // We accept a higher level osr method
1228 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1229 if (nm != NULL) return nm;
1230 if (method->is_not_osr_compilable(comp_level)) return NULL;
1231 }
1232
1233 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1234 // some prerequisites that are compiler specific
1235 if (comp->is_c2() || comp->is_shark()) {
1236 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1237 // Resolve all classes seen in the signature of the method
1238 // we are compiling.
1239 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1240 }
1241
1242 // If the method is native, do the lookup in the thread requesting
1243 // the compilation. Native lookups can load code, which is not
1244 // permitted during compilation.
1245 //
1246 // Note: A native method implies non-osr compilation which is
1247 // checked with an assertion at the entry of this method.
1248 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1249 bool in_base_library;
1250 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1251 if (HAS_PENDING_EXCEPTION) {
1252 // In case of an exception looking up the method, we just forget
1253 // about it. The interpreter will kick-in and throw the exception.
1254 method->set_not_compilable(); // implies is_not_osr_compilable()
1255 CLEAR_PENDING_EXCEPTION;
1256 return NULL;
1257 }
1258 assert(method->has_native_function(), "must have native code by now");
1259 }
1260
1261 // RedefineClasses() has replaced this method; just return
1262 if (method->is_old()) {
1263 return NULL;
1264 }
1265
1266 // JVMTI -- post_compile_event requires jmethod_id() that may require
1267 // a lock the compiling thread can not acquire. Prefetch it here.
1268 if (JvmtiExport::should_post_compiled_method_load()) {
1269 method->jmethod_id();
1270 }
1271
1272 // do the compilation
1273 if (method->is_native()) {
1274 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1275 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1276 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1277 //
1278 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1279 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1280 AdapterHandlerLibrary::create_native_wrapper(method);
1281 } else {
1282 return NULL;
1283 }
1284 } else {
1285 // If the compiler is shut off due to code cache getting full
1286 // fail out now so blocking compiles dont hang the java thread
1287 if (!should_compile_new_jobs()) {
1288 CompilationPolicy::policy()->delay_compilation(method());
1289 return NULL;
1290 }
1291 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1292 }
1293
1294 // return requested nmethod
1295 // We accept a higher level osr method
1296 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1297 }
1298
1299
1300 // ------------------------------------------------------------------
1301 // CompileBroker::compilation_is_complete
1302 //
1303 // See if compilation of this method is already complete.
1304 bool CompileBroker::compilation_is_complete(methodHandle method,
1305 int osr_bci,
1306 int comp_level) {
1307 bool is_osr = (osr_bci != standard_entry_bci);
1308 if (is_osr) {
1309 if (method->is_not_osr_compilable(comp_level)) {
1310 return true;
1311 } else {
1312 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1313 return (result != NULL);
1314 }
1315 } else {
1316 if (method->is_not_compilable(comp_level)) {
1317 return true;
1318 } else {
1319 nmethod* result = method->code();
1320 if (result == NULL) return false;
1321 return comp_level == result->comp_level();
1322 }
1323 }
1324 }
1325
1326
1327 // ------------------------------------------------------------------
1328 // CompileBroker::compilation_is_in_queue
1329 //
1330 // See if this compilation is already requested.
1331 //
1332 // Implementation note: there is only a single "is in queue" bit
1333 // for each method. This means that the check below is overly
1334 // conservative in the sense that an osr compilation in the queue
1335 // will block a normal compilation from entering the queue (and vice
1336 // versa). This can be remedied by a full queue search to disambiguate
1337 // cases. If it is deemed profitible, this may be done.
1338 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1339 int osr_bci) {
1340 return method->queued_for_compilation();
1341 }
1342
1343 // ------------------------------------------------------------------
1344 // CompileBroker::compilation_is_prohibited
1345 //
1346 // See if this compilation is not allowed.
1347 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1348 bool is_native = method->is_native();
1349 // Some compilers may not support the compilation of natives.
1350 AbstractCompiler *comp = compiler(comp_level);
1351 if (is_native &&
1352 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1353 method->set_not_compilable_quietly(comp_level);
1354 return true;
1355 }
1356
1357 bool is_osr = (osr_bci != standard_entry_bci);
1358 // Some compilers may not support on stack replacement.
1359 if (is_osr &&
1360 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1361 method->set_not_osr_compilable(comp_level);
1362 return true;
1363 }
1364
1365 // The method may be explicitly excluded by the user.
1366 bool quietly;
1367 if (CompilerOracle::should_exclude(method, quietly)) {
1368 if (!quietly) {
1369 // This does not happen quietly...
1370 ResourceMark rm;
1371 tty->print("### Excluding %s:%s",
1372 method->is_native() ? "generation of native wrapper" : "compile",
1373 (method->is_static() ? " static" : ""));
1374 method->print_short_name(tty);
1375 tty->cr();
1376 }
1377 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1378 }
1379
1380 return false;
1381 }
1382
1383 /**
1384 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1385 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1386 * The function also allows to generate separate compilation IDs for OSR compilations.
1387 */
1388 int CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1389 #ifdef ASSERT
1390 bool is_osr = (osr_bci != standard_entry_bci);
1391 int id;
1392 if (method->is_native()) {
1393 assert(!is_osr, "can't be osr");
1394 // Adapters, native wrappers and method handle intrinsics
1395 // should be generated always.
1396 return Atomic::add(1, &_compilation_id);
1397 } else if (CICountOSR && is_osr) {
1398 id = Atomic::add(1, &_osr_compilation_id);
1399 if (CIStartOSR <= id && id < CIStopOSR) {
1400 return id;
1401 }
1402 } else {
1403 id = Atomic::add(1, &_compilation_id);
1404 if (CIStart <= id && id < CIStop) {
1405 return id;
1406 }
1407 }
1408
1409 // Method was not in the appropriate compilation range.
1410 method->set_not_compilable_quietly();
1411 return 0;
1412 #else
1413 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1414 // only _compilation_id is incremented.
1415 return Atomic::add(1, &_compilation_id);
1416 #endif
1417 }
1418
1419
1420 // ------------------------------------------------------------------
1421 // CompileBroker::is_compile_blocking
1422 //
1423 // Should the current thread be blocked until this compilation request
1424 // has been fulfilled?
1425 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1426 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1427 return !BackgroundCompilation;
1428 }
1429
1430
1431 // ------------------------------------------------------------------
1432 // CompileBroker::preload_classes
1433 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1434 // Move this code over from c1_Compiler.cpp
1435 ShouldNotReachHere();
1436 }
1437
1438
1439 // ------------------------------------------------------------------
1440 // CompileBroker::create_compile_task
1441 //
1442 // Create a CompileTask object representing the current request for
1443 // compilation. Add this task to the queue.
1444 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1445 int compile_id,
1446 methodHandle method,
1447 int osr_bci,
1448 int comp_level,
1449 methodHandle hot_method,
1450 int hot_count,
1451 const char* comment,
1452 bool blocking) {
1453 CompileTask* new_task = allocate_task();
1454 new_task->initialize(compile_id, method, osr_bci, comp_level,
1455 hot_method, hot_count, comment,
1456 blocking);
1457 queue->add(new_task);
1458 return new_task;
1459 }
1460
1461
1462 // ------------------------------------------------------------------
1463 // CompileBroker::allocate_task
1464 //
1465 // Allocate a CompileTask, from the free list if possible.
1466 CompileTask* CompileBroker::allocate_task() {
1467 MutexLocker locker(CompileTaskAlloc_lock);
1468 CompileTask* task = NULL;
1469 if (_task_free_list != NULL) {
1470 task = _task_free_list;
1471 _task_free_list = task->next();
1472 task->set_next(NULL);
1473 } else {
1474 task = new CompileTask();
1475 task->set_next(NULL);
1476 }
1477 return task;
1478 }
1479
1480
1481 // ------------------------------------------------------------------
1482 // CompileBroker::free_task
1483 //
1484 // Add a task to the free list.
1485 void CompileBroker::free_task(CompileTask* task) {
1486 MutexLocker locker(CompileTaskAlloc_lock);
1487 task->free();
1488 task->set_next(_task_free_list);
1489 _task_free_list = task;
1490 }
1491
1492
1493 // ------------------------------------------------------------------
1494 // CompileBroker::wait_for_completion
1495 //
1496 // Wait for the given method CompileTask to complete.
1497 void CompileBroker::wait_for_completion(CompileTask* task) {
1498 if (CIPrintCompileQueue) {
1499 tty->print_cr("BLOCKING FOR COMPILE");
1500 }
1501
1502 assert(task->is_blocking(), "can only wait on blocking task");
1503
1504 JavaThread *thread = JavaThread::current();
1505 thread->set_blocked_on_compilation(true);
1506
1507 methodHandle method(thread, task->method());
1508 {
1509 MutexLocker waiter(task->lock(), thread);
1510
1511 while (!task->is_complete())
1512 task->lock()->wait();
1513 }
1514 // It is harmless to check this status without the lock, because
1515 // completion is a stable property (until the task object is recycled).
1516 assert(task->is_complete(), "Compilation should have completed");
1517 assert(task->code_handle() == NULL, "must be reset");
1518
1519 thread->set_blocked_on_compilation(false);
1520
1521 // By convention, the waiter is responsible for recycling a
1522 // blocking CompileTask. Since there is only one waiter ever
1523 // waiting on a CompileTask, we know that no one else will
1524 // be using this CompileTask; we can free it.
1525 free_task(task);
1526 }
1527
1528 // Initialize compiler thread(s) + compiler object(s). The postcondition
1529 // of this function is that the compiler runtimes are initialized and that
1530 //compiler threads can start compiling.
1531 bool CompileBroker::init_compiler_runtime() {
1532 CompilerThread* thread = CompilerThread::current();
1533 AbstractCompiler* comp = thread->compiler();
1534 // Final sanity check - the compiler object must exist
1535 guarantee(comp != NULL, "Compiler object must exist");
1536
1537 int system_dictionary_modification_counter;
1538 {
1539 MutexLocker locker(Compile_lock, thread);
1540 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1541 }
1542
1543 {
1544 // Must switch to native to allocate ci_env
1545 ThreadToNativeFromVM ttn(thread);
1546 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1547 // Cache Jvmti state
1548 ci_env.cache_jvmti_state();
1549 // Cache DTrace flags
1550 ci_env.cache_dtrace_flags();
1551
1552 // Switch back to VM state to do compiler initialization
1553 ThreadInVMfromNative tv(thread);
1554 ResetNoHandleMark rnhm;
1555
1556
1557 if (!comp->is_shark()) {
1558 // Perform per-thread and global initializations
1559 comp->initialize();
1560 }
1561 }
1562
1563 if (comp->is_failed()) {
1564 disable_compilation_forever();
1565 // If compiler initialization failed, no compiler thread that is specific to a
1566 // particular compiler runtime will ever start to compile methods.
1567
1568 shutdown_compiler_runtime(comp, thread);
1569 return false;
1570 }
1571
1572 // C1 specific check
1573 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1574 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1575 return false;
1576 }
1577
1578 return true;
1579 }
1580
1581 // If C1 and/or C2 initialization failed, we shut down all compilation.
1582 // We do this to keep things simple. This can be changed if it ever turns out to be
1583 // a problem.
1584 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1585 // Free buffer blob, if allocated
1586 if (thread->get_buffer_blob() != NULL) {
1587 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1588 CodeCache::free(thread->get_buffer_blob());
1589 }
1590
1591 if (comp->should_perform_shutdown()) {
1592 // There are two reasons for shutting down the compiler
1593 // 1) compiler runtime initialization failed
1594 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1595 warning("Shutting down compiler %s (no space to run compilers)", comp->name());
1596
1597 // Only one thread per compiler runtime object enters here
1598 // Set state to shut down
1599 comp->set_shut_down();
1600
1601 MutexLocker mu(MethodCompileQueue_lock, thread);
1602 CompileQueue* queue;
1603 if (_c1_method_queue != NULL) {
1604 _c1_method_queue->delete_all();
1605 queue = _c1_method_queue;
1606 _c1_method_queue = NULL;
1607 delete _c1_method_queue;
1608 }
1609
1610 if (_c2_method_queue != NULL) {
1611 _c2_method_queue->delete_all();
1612 queue = _c2_method_queue;
1613 _c2_method_queue = NULL;
1614 delete _c2_method_queue;
1615 }
1616
1617 // We could delete compiler runtimes also. However, there are references to
1618 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1619 // fail. This can be done later if necessary.
1620 }
1621 }
1622
1623 // ------------------------------------------------------------------
1624 // CompileBroker::compiler_thread_loop
1625 //
1626 // The main loop run by a CompilerThread.
1627 void CompileBroker::compiler_thread_loop() {
1628 CompilerThread* thread = CompilerThread::current();
1629 CompileQueue* queue = thread->queue();
1630 // For the thread that initializes the ciObjectFactory
1631 // this resource mark holds all the shared objects
1632 ResourceMark rm;
1633
1634 // First thread to get here will initialize the compiler interface
1635
1636 if (!ciObjectFactory::is_initialized()) {
1637 ASSERT_IN_VM;
1638 MutexLocker only_one (CompileThread_lock, thread);
1639 if (!ciObjectFactory::is_initialized()) {
1640 ciObjectFactory::initialize();
1641 }
1642 }
1643
1644 // Open a log.
1645 if (LogCompilation) {
1646 init_compiler_thread_log();
1647 }
1648 CompileLog* log = thread->log();
1649 if (log != NULL) {
1650 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1651 thread->name(),
1652 os::current_thread_id(),
1653 os::current_process_id());
1654 log->stamp();
1655 log->end_elem();
1656 }
1657
1658 // If compiler thread/runtime initialization fails, exit the compiler thread
1659 if (!init_compiler_runtime()) {
1660 return;
1661 }
1662
1663 // Poll for new compilation tasks as long as the JVM runs. Compilation
1664 // should only be disabled if something went wrong while initializing the
1665 // compiler runtimes. This, in turn, should not happen. The only known case
1666 // when compiler runtime initialization fails is if there is not enough free
1667 // space in the code cache to generate the necessary stubs, etc.
1668 while (!is_compilation_disabled_forever()) {
1669 // We need this HandleMark to avoid leaking VM handles.
1670 HandleMark hm(thread);
1671
1672 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1673 // the code cache is really full
1674 handle_full_code_cache();
1675 }
1676
1677 CompileTask* task = queue->get();
1678 if (task == NULL) {
1679 continue;
1680 }
1681
1682 // Give compiler threads an extra quanta. They tend to be bursty and
1683 // this helps the compiler to finish up the job.
1684 if( CompilerThreadHintNoPreempt )
1685 os::hint_no_preempt();
1686
1687 // trace per thread time and compile statistics
1688 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1689 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1690
1691 // Assign the task to the current thread. Mark this compilation
1692 // thread as active for the profiler.
1693 CompileTaskWrapper ctw(task);
1694 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1695 task->set_code_handle(&result_handle);
1696 methodHandle method(thread, task->method());
1697
1698 // Never compile a method if breakpoints are present in it
1699 if (method()->number_of_breakpoints() == 0) {
1700 // Compile the method.
1701 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1702 #ifdef COMPILER1
1703 // Allow repeating compilations for the purpose of benchmarking
1704 // compile speed. This is not useful for customers.
1705 if (CompilationRepeat != 0) {
1706 int compile_count = CompilationRepeat;
1707 while (compile_count > 0) {
1708 invoke_compiler_on_method(task);
1709 nmethod* nm = method->code();
1710 if (nm != NULL) {
1711 nm->make_zombie();
1712 method->clear_code();
1713 }
1714 compile_count--;
1715 }
1716 }
1717 #endif /* COMPILER1 */
1718 invoke_compiler_on_method(task);
1719 } else {
1720 // After compilation is disabled, remove remaining methods from queue
1721 method->clear_queued_for_compilation();
1722 }
1723 }
1724 }
1725
1726 // Shut down compiler runtime
1727 shutdown_compiler_runtime(thread->compiler(), thread);
1728 }
1729
1730 // ------------------------------------------------------------------
1731 // CompileBroker::init_compiler_thread_log
1732 //
1733 // Set up state required by +LogCompilation.
1734 void CompileBroker::init_compiler_thread_log() {
1735 CompilerThread* thread = CompilerThread::current();
1736 char file_name[4*K];
1737 FILE* fp = NULL;
1738 intx thread_id = os::current_thread_id();
1739 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1740 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1741 if (dir == NULL) {
1742 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1743 thread_id, os::current_process_id());
1744 } else {
1745 jio_snprintf(file_name, sizeof(file_name),
1746 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1747 os::file_separator(), thread_id, os::current_process_id());
1748 }
1749
1750 fp = fopen(file_name, "at");
1751 if (fp != NULL) {
1752 if (LogCompilation && Verbose) {
1753 tty->print_cr("Opening compilation log %s", file_name);
1754 }
1755 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1756 thread->init_log(log);
1757
1758 if (xtty != NULL) {
1759 ttyLocker ttyl;
1760 // Record any per thread log files
1761 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name);
1762 }
1763 return;
1764 }
1765 }
1766 warning("Cannot open log file: %s", file_name);
1767 }
1768
1769 // ------------------------------------------------------------------
1770 // CompileBroker::set_should_block
1771 //
1772 // Set _should_block.
1773 // Call this from the VM, with Threads_lock held and a safepoint requested.
1774 void CompileBroker::set_should_block() {
1775 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1776 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1777 #ifndef PRODUCT
1778 if (PrintCompilation && (Verbose || WizardMode))
1779 tty->print_cr("notifying compiler thread pool to block");
1780 #endif
1781 _should_block = true;
1782 }
1783
1784 // ------------------------------------------------------------------
1785 // CompileBroker::maybe_block
1786 //
1787 // Call this from the compiler at convenient points, to poll for _should_block.
1788 void CompileBroker::maybe_block() {
1789 if (_should_block) {
1790 #ifndef PRODUCT
1791 if (PrintCompilation && (Verbose || WizardMode))
1792 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1793 #endif
1794 ThreadInVMfromNative tivfn(JavaThread::current());
1795 }
1796 }
1797
1798 // wrapper for CodeCache::print_summary()
1799 static void codecache_print(bool detailed)
1800 {
1801 ResourceMark rm;
1802 stringStream s;
1803 // Dump code cache into a buffer before locking the tty,
1804 {
1805 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1806 CodeCache::print_summary(&s, detailed);
1807 }
1808 ttyLocker ttyl;
1809 tty->print(s.as_string());
1810 }
1811
1812 // ------------------------------------------------------------------
1813 // CompileBroker::invoke_compiler_on_method
1814 //
1815 // Compile a method.
1816 //
1817 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1818 if (PrintCompilation) {
1819 ResourceMark rm;
1820 task->print_line();
1821 }
1822 elapsedTimer time;
1823
1824 CompilerThread* thread = CompilerThread::current();
1825 ResourceMark rm(thread);
1826
1827 if (LogEvents) {
1828 _compilation_log->log_compile(thread, task);
1829 }
1830
1831 // Common flags.
1832 uint compile_id = task->compile_id();
1833 int osr_bci = task->osr_bci();
1834 bool is_osr = (osr_bci != standard_entry_bci);
1835 bool should_log = (thread->log() != NULL);
1836 bool should_break = false;
1837 int task_level = task->comp_level();
1838 {
1839 // create the handle inside it's own block so it can't
1840 // accidentally be referenced once the thread transitions to
1841 // native. The NoHandleMark before the transition should catch
1842 // any cases where this occurs in the future.
1843 methodHandle method(thread, task->method());
1844 should_break = check_break_at(method, compile_id, is_osr);
1845 if (should_log && !CompilerOracle::should_log(method)) {
1846 should_log = false;
1847 }
1848 assert(!method->is_native(), "no longer compile natives");
1849
1850 // Save information about this method in case of failure.
1851 set_last_compile(thread, method, is_osr, task_level);
1852
1853 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1854 }
1855
1856 // Allocate a new set of JNI handles.
1857 push_jni_handle_block();
1858 Method* target_handle = task->method();
1859 int compilable = ciEnv::MethodCompilable;
1860 {
1861 int system_dictionary_modification_counter;
1862 {
1863 MutexLocker locker(Compile_lock, thread);
1864 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1865 }
1866
1867 NoHandleMark nhm;
1868 ThreadToNativeFromVM ttn(thread);
1869
1870 ciEnv ci_env(task, system_dictionary_modification_counter);
1871 if (should_break) {
1872 ci_env.set_break_at_compile(true);
1873 }
1874 if (should_log) {
1875 ci_env.set_log(thread->log());
1876 }
1877 assert(thread->env() == &ci_env, "set by ci_env");
1878 // The thread-env() field is cleared in ~CompileTaskWrapper.
1879
1880 // Cache Jvmti state
1881 ci_env.cache_jvmti_state();
1882
1883 // Cache DTrace flags
1884 ci_env.cache_dtrace_flags();
1885
1886 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1887
1888 TraceTime t1("compilation", &time);
1889 EventCompilation event;
1890
1891 AbstractCompiler *comp = compiler(task_level);
1892 if (comp == NULL) {
1893 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1894 } else {
1895 comp->compile_method(&ci_env, target, osr_bci);
1896 }
1897
1898 if (!ci_env.failing() && task->code() == NULL) {
1899 //assert(false, "compiler should always document failure");
1900 // The compiler elected, without comment, not to register a result.
1901 // Do not attempt further compilations of this method.
1902 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1903 }
1904
1905 // Copy this bit to the enclosing block:
1906 compilable = ci_env.compilable();
1907
1908 if (ci_env.failing()) {
1909 const char* retry_message = ci_env.retry_message();
1910 if (_compilation_log != NULL) {
1911 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1912 }
1913 if (PrintCompilation) {
1914 FormatBufferResource msg = retry_message != NULL ?
1915 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1916 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1917 task->print_compilation(tty, msg);
1918 }
1919 } else {
1920 task->mark_success();
1921 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1922 if (_compilation_log != NULL) {
1923 nmethod* code = task->code();
1924 if (code != NULL) {
1925 _compilation_log->log_nmethod(thread, code);
1926 }
1927 }
1928 }
1929 // simulate crash during compilation
1930 assert(task->compile_id() != CICrashAt, "just as planned");
1931 if (event.should_commit()) {
1932 event.set_method(target->get_Method());
1933 event.set_compileID(compile_id);
1934 event.set_compileLevel(task->comp_level());
1935 event.set_succeded(task->is_success());
1936 event.set_isOsr(is_osr);
1937 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1938 event.set_inlinedBytes(task->num_inlined_bytecodes());
1939 event.commit();
1940 }
1941 }
1942 pop_jni_handle_block();
1943
1944 methodHandle method(thread, task->method());
1945
1946 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1947
1948 collect_statistics(thread, time, task);
1949
1950 if (PrintCompilation && PrintCompilation2) {
1951 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1952 tty->print("%4d ", compile_id); // print compilation number
1953 tty->print("%s ", (is_osr ? "%" : " "));
1954 if (task->code() != NULL) {
1955 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1956 }
1957 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1958 }
1959
1960 if (PrintCodeCacheOnCompilation)
1961 codecache_print(/* detailed= */ false);
1962
1963 // Disable compilation, if required.
1964 switch (compilable) {
1965 case ciEnv::MethodCompilable_never:
1966 if (is_osr)
1967 method->set_not_osr_compilable_quietly();
1968 else
1969 method->set_not_compilable_quietly();
1970 break;
1971 case ciEnv::MethodCompilable_not_at_tier:
1972 if (is_osr)
1973 method->set_not_osr_compilable_quietly(task_level);
1974 else
1975 method->set_not_compilable_quietly(task_level);
1976 break;
1977 }
1978
1979 // Note that the queued_for_compilation bits are cleared without
1980 // protection of a mutex. [They were set by the requester thread,
1981 // when adding the task to the complie queue -- at which time the
1982 // compile queue lock was held. Subsequently, we acquired the compile
1983 // queue lock to get this task off the compile queue; thus (to belabour
1984 // the point somewhat) our clearing of the bits must be occurring
1985 // only after the setting of the bits. See also 14012000 above.
1986 method->clear_queued_for_compilation();
1987
1988 #ifdef ASSERT
1989 if (CollectedHeap::fired_fake_oom()) {
1990 // The current compile received a fake OOM during compilation so
1991 // go ahead and exit the VM since the test apparently succeeded
1992 tty->print_cr("*** Shutting down VM after successful fake OOM");
1993 vm_exit(0);
1994 }
1995 #endif
1996 }
1997
1998 /**
1999 * The CodeCache is full. Print out warning and disable compilation
2000 * or try code cache cleaning so compilation can continue later.
2001 */
2002 void CompileBroker::handle_full_code_cache() {
2003 UseInterpreter = true;
2004 if (UseCompiler || AlwaysCompileLoopMethods ) {
2005 if (xtty != NULL) {
2006 ResourceMark rm;
2007 stringStream s;
2008 // Dump code cache state into a buffer before locking the tty,
2009 // because log_state() will use locks causing lock conflicts.
2010 CodeCache::log_state(&s);
2011 // Lock to prevent tearing
2012 ttyLocker ttyl;
2013 xtty->begin_elem("code_cache_full");
2014 xtty->print(s.as_string());
2015 xtty->stamp();
2016 xtty->end_elem();
2017 }
2018
2019 CodeCache::report_codemem_full();
2020
2021 #ifndef PRODUCT
2022 if (CompileTheWorld || ExitOnFullCodeCache) {
2023 codecache_print(/* detailed= */ true);
2024 before_exit(JavaThread::current());
2025 exit_globals(); // will delete tty
2026 vm_direct_exit(CompileTheWorld ? 0 : 1);
2027 }
2028 #endif
2029 if (UseCodeCacheFlushing) {
2030 // Since code cache is full, immediately stop new compiles
2031 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2032 NMethodSweeper::log_sweep("disable_compiler");
2033 }
2034 // Switch to 'vm_state'. This ensures that possibly_sweep() can be called
2035 // without having to consider the state in which the current thread is.
2036 ThreadInVMfromUnknown in_vm;
2037 NMethodSweeper::possibly_sweep();
2038 } else {
2039 disable_compilation_forever();
2040 }
2041
2042 // Print warning only once
2043 if (should_print_compiler_warning()) {
2044 warning("CodeCache is full. Compiler has been disabled.");
2045 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
2046 codecache_print(/* detailed= */ true);
2047 }
2048 }
2049 }
2050
2051 // ------------------------------------------------------------------
2052 // CompileBroker::set_last_compile
2053 //
2054 // Record this compilation for debugging purposes.
2055 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
2056 ResourceMark rm;
2057 char* method_name = method->name()->as_C_string();
2058 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2059 char current_method[CompilerCounters::cmname_buffer_length];
2060 size_t maxLen = CompilerCounters::cmname_buffer_length;
2061
2062 if (UsePerfData) {
2063 const char* class_name = method->method_holder()->name()->as_C_string();
2064
2065 size_t s1len = strlen(class_name);
2066 size_t s2len = strlen(method_name);
2067
2068 // check if we need to truncate the string
2069 if (s1len + s2len + 2 > maxLen) {
2070
2071 // the strategy is to lop off the leading characters of the
2072 // class name and the trailing characters of the method name.
2073
2074 if (s2len + 2 > maxLen) {
2075 // lop of the entire class name string, let snprintf handle
2076 // truncation of the method name.
2077 class_name += s1len; // null string
2078 }
2079 else {
2080 // lop off the extra characters from the front of the class name
2081 class_name += ((s1len + s2len + 2) - maxLen);
2082 }
2083 }
2084
2085 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2086 }
2087
2088 if (CICountOSR && is_osr) {
2089 _last_compile_type = osr_compile;
2090 } else {
2091 _last_compile_type = normal_compile;
2092 }
2093 _last_compile_level = comp_level;
2094
2095 if (UsePerfData) {
2096 CompilerCounters* counters = thread->counters();
2097 counters->set_current_method(current_method);
2098 counters->set_compile_type((jlong)_last_compile_type);
2099 }
2100 }
2101
2102
2103 // ------------------------------------------------------------------
2104 // CompileBroker::push_jni_handle_block
2105 //
2106 // Push on a new block of JNI handles.
2107 void CompileBroker::push_jni_handle_block() {
2108 JavaThread* thread = JavaThread::current();
2109
2110 // Allocate a new block for JNI handles.
2111 // Inlined code from jni_PushLocalFrame()
2112 JNIHandleBlock* java_handles = thread->active_handles();
2113 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2114 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2115 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2116 thread->set_active_handles(compile_handles);
2117 }
2118
2119
2120 // ------------------------------------------------------------------
2121 // CompileBroker::pop_jni_handle_block
2122 //
2123 // Pop off the current block of JNI handles.
2124 void CompileBroker::pop_jni_handle_block() {
2125 JavaThread* thread = JavaThread::current();
2126
2127 // Release our JNI handle block
2128 JNIHandleBlock* compile_handles = thread->active_handles();
2129 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2130 thread->set_active_handles(java_handles);
2131 compile_handles->set_pop_frame_link(NULL);
2132 JNIHandleBlock::release_block(compile_handles, thread); // may block
2133 }
2134
2135
2136 // ------------------------------------------------------------------
2137 // CompileBroker::check_break_at
2138 //
2139 // Should the compilation break at the current compilation.
2140 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2141 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2142 return true;
2143 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2144 return true;
2145 } else {
2146 return (compile_id == CIBreakAt);
2147 }
2148 }
2149
2150 // ------------------------------------------------------------------
2151 // CompileBroker::collect_statistics
2152 //
2153 // Collect statistics about the compilation.
2154
2155 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2156 bool success = task->is_success();
2157 methodHandle method (thread, task->method());
2158 uint compile_id = task->compile_id();
2159 bool is_osr = (task->osr_bci() != standard_entry_bci);
2160 nmethod* code = task->code();
2161 CompilerCounters* counters = thread->counters();
2162
2163 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2164 MutexLocker locker(CompileStatistics_lock);
2165
2166 // _perf variables are production performance counters which are
2167 // updated regardless of the setting of the CITime and CITimeEach flags
2168 //
2169 if (!success) {
2170 _total_bailout_count++;
2171 if (UsePerfData) {
2172 _perf_last_failed_method->set_value(counters->current_method());
2173 _perf_last_failed_type->set_value(counters->compile_type());
2174 _perf_total_bailout_count->inc();
2175 }
2176 } else if (code == NULL) {
2177 if (UsePerfData) {
2178 _perf_last_invalidated_method->set_value(counters->current_method());
2179 _perf_last_invalidated_type->set_value(counters->compile_type());
2180 _perf_total_invalidated_count->inc();
2181 }
2182 _total_invalidated_count++;
2183 } else {
2184 // Compilation succeeded
2185
2186 // update compilation ticks - used by the implementation of
2187 // java.lang.management.CompilationMBean
2188 _perf_total_compilation->inc(time.ticks());
2189
2190 _t_total_compilation.add(time);
2191 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2192
2193 if (CITime) {
2194 if (is_osr) {
2195 _t_osr_compilation.add(time);
2196 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2197 } else {
2198 _t_standard_compilation.add(time);
2199 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2200 }
2201 }
2202
2203 if (UsePerfData) {
2204 // save the name of the last method compiled
2205 _perf_last_method->set_value(counters->current_method());
2206 _perf_last_compile_type->set_value(counters->compile_type());
2207 _perf_last_compile_size->set_value(method->code_size() +
2208 task->num_inlined_bytecodes());
2209 if (is_osr) {
2210 _perf_osr_compilation->inc(time.ticks());
2211 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2212 } else {
2213 _perf_standard_compilation->inc(time.ticks());
2214 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2215 }
2216 }
2217
2218 if (CITimeEach) {
2219 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2220 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2221 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2222 }
2223
2224 // Collect counts of successful compilations
2225 _sum_nmethod_size += code->total_size();
2226 _sum_nmethod_code_size += code->insts_size();
2227 _total_compile_count++;
2228
2229 if (UsePerfData) {
2230 _perf_sum_nmethod_size->inc( code->total_size());
2231 _perf_sum_nmethod_code_size->inc(code->insts_size());
2232 _perf_total_compile_count->inc();
2233 }
2234
2235 if (is_osr) {
2236 if (UsePerfData) _perf_total_osr_compile_count->inc();
2237 _total_osr_compile_count++;
2238 } else {
2239 if (UsePerfData) _perf_total_standard_compile_count->inc();
2240 _total_standard_compile_count++;
2241 }
2242 }
2243 // set the current method for the thread to null
2244 if (UsePerfData) counters->set_current_method("");
2245 }
2246
2247 const char* CompileBroker::compiler_name(int comp_level) {
2248 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2249 if (comp == NULL) {
2250 return "no compiler";
2251 } else {
2252 return (comp->name());
2253 }
2254 }
2255
2256 void CompileBroker::print_times() {
2257 tty->cr();
2258 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2259 tty->print_cr("------------------------------------------------");
2260 //0000000000111111111122222222223333333333444444444455555555556666666666
2261 //0123456789012345678901234567890123456789012345678901234567890123456789
2262 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2263 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2264 CompileBroker::_t_standard_compilation.seconds(),
2265 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2266 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);
2267
2268 AbstractCompiler *comp = compiler(CompLevel_simple);
2269 if (comp != NULL) {
2270 comp->print_timers();
2271 }
2272 comp = compiler(CompLevel_full_optimization);
2273 if (comp != NULL) {
2274 comp->print_timers();
2275 }
2276 tty->cr();
2277 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2278 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2279 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2280 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2281 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2282 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2283 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2284 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2285 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2286 tty->cr();
2287 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2288 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2289 }
2290
2291 // Debugging output for failure
2292 void CompileBroker::print_last_compile() {
2293 if ( _last_compile_level != CompLevel_none &&
2294 compiler(_last_compile_level) != NULL &&
2295 _last_method_compiled != NULL &&
2296 _last_compile_type != no_compile) {
2297 if (_last_compile_type == osr_compile) {
2298 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2299 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2300 } else {
2301 tty->print_cr("Last parse: %d+++(%d) %s",
2302 _compilation_id, _last_compile_level, _last_method_compiled);
2303 }
2304 }
2305 }
2306
2307
2308 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2309 #ifndef PRODUCT
2310 st->print_cr("Compiler thread printing unimplemented.");
2311 st->cr();
2312 #endif
2313 }