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 #ifndef USDT2
64 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
65 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
66 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
67 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
68
69 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
70 { \
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 }
80
81 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
82 { \
83 Symbol* klass_name = (method)->klass_name(); \
84 Symbol* name = (method)->name(); \
85 Symbol* signature = (method)->signature(); \
86 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
87 comp_name, strlen(comp_name), \
88 klass_name->bytes(), klass_name->utf8_length(), \
89 name->bytes(), name->utf8_length(), \
90 signature->bytes(), signature->utf8_length(), (success)); \
91 }
92
93 #else /* USDT2 */
94
95 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
96 { \
97 Symbol* klass_name = (method)->klass_name(); \
98 Symbol* name = (method)->name(); \
99 Symbol* signature = (method)->signature(); \
100 HOTSPOT_METHOD_COMPILE_BEGIN( \
101 comp_name, strlen(comp_name), \
102 (char *) klass_name->bytes(), klass_name->utf8_length(), \
103 (char *) name->bytes(), name->utf8_length(), \
104 (char *) signature->bytes(), signature->utf8_length()); \
105 }
106
107 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
108 { \
109 Symbol* klass_name = (method)->klass_name(); \
110 Symbol* name = (method)->name(); \
111 Symbol* signature = (method)->signature(); \
112 HOTSPOT_METHOD_COMPILE_END( \
113 comp_name, strlen(comp_name), \
114 (char *) klass_name->bytes(), klass_name->utf8_length(), \
115 (char *) name->bytes(), name->utf8_length(), \
116 (char *) signature->bytes(), signature->utf8_length(), (success)); \
117 }
118 #endif /* USDT2 */
119
120 #else // ndef DTRACE_ENABLED
121
122 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
123 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
124
125 #endif // ndef DTRACE_ENABLED
126
127 bool CompileBroker::_initialized = false;
128 volatile bool CompileBroker::_should_block = false;
129 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
130
131 // The installed compiler(s)
132 AbstractCompiler* CompileBroker::_compilers[2];
133
134 // These counters are used for assigning id's to each compilation
135 uint CompileBroker::_compilation_id = 0;
136 uint CompileBroker::_osr_compilation_id = 0;
137
138 // Debugging information
139 int CompileBroker::_last_compile_type = no_compile;
140 int CompileBroker::_last_compile_level = CompLevel_none;
141 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
142
143 // Performance counters
144 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
145 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
146 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
147
148 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
149 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
153
154 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
155 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
156 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
157 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
158
159 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
160 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
161 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
162 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
163 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
164 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
165 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
166
167 // Timers and counters for generating statistics
168 elapsedTimer CompileBroker::_t_total_compilation;
169 elapsedTimer CompileBroker::_t_osr_compilation;
170 elapsedTimer CompileBroker::_t_standard_compilation;
171
172 int CompileBroker::_total_bailout_count = 0;
173 int CompileBroker::_total_invalidated_count = 0;
174 int CompileBroker::_total_compile_count = 0;
175 int CompileBroker::_total_osr_compile_count = 0;
176 int CompileBroker::_total_standard_compile_count = 0;
177
178 int CompileBroker::_sum_osr_bytes_compiled = 0;
179 int CompileBroker::_sum_standard_bytes_compiled = 0;
180 int CompileBroker::_sum_nmethod_size = 0;
181 int CompileBroker::_sum_nmethod_code_size = 0;
182
183 long CompileBroker::_peak_compilation_time = 0;
184
185 CompileQueue* CompileBroker::_c2_method_queue = NULL;
186 CompileQueue* CompileBroker::_c1_method_queue = NULL;
187 CompileTask* CompileBroker::_task_free_list = NULL;
188
189 GrowableArray<CompilerThread*>* CompileBroker::_compiler_threads = NULL;
190
191
192 class CompilationLog : public StringEventLog {
193 public:
194 CompilationLog() : StringEventLog("Compilation events") {
195 }
196
197 void log_compile(JavaThread* thread, CompileTask* task) {
198 StringLogMessage lm;
199 stringStream sstr = lm.stream();
200 // msg.time_stamp().update_to(tty->time_stamp().ticks());
201 task->print_compilation(&sstr, NULL, true);
202 log(thread, "%s", (const char*)lm);
203 }
204
205 void log_nmethod(JavaThread* thread, nmethod* nm) {
206 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
207 nm->compile_id(), nm->is_osr_method() ? "%" : "",
208 nm, nm->code_begin(), nm->code_end());
209 }
210
211 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
212 StringLogMessage lm;
213 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
214 if (retry_message != NULL) {
215 lm.append(" (%s)", retry_message);
216 }
217 lm.print("\n");
218 log(thread, "%s", (const char*)lm);
219 }
220 };
221
222 static CompilationLog* _compilation_log = NULL;
223
224 void compileBroker_init() {
225 if (LogEvents) {
226 _compilation_log = new CompilationLog();
227 }
228 }
229
230 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
231 CompilerThread* thread = CompilerThread::current();
232 thread->set_task(task);
233 CompileLog* log = thread->log();
234 if (log != NULL) task->log_task_start(log);
235 }
236
237 CompileTaskWrapper::~CompileTaskWrapper() {
238 CompilerThread* thread = CompilerThread::current();
239 CompileTask* task = thread->task();
240 CompileLog* log = thread->log();
241 if (log != NULL) task->log_task_done(log);
242 thread->set_task(NULL);
243 task->set_code_handle(NULL);
244 thread->set_env(NULL);
245 if (task->is_blocking()) {
246 MutexLocker notifier(task->lock(), thread);
247 task->mark_complete();
248 // Notify the waiting thread that the compilation has completed.
249 task->lock()->notify_all();
250 } else {
251 task->mark_complete();
252
253 // By convention, the compiling thread is responsible for
254 // recycling a non-blocking CompileTask.
255 CompileBroker::free_task(task);
256 }
257 }
258
259
260 // ------------------------------------------------------------------
261 // CompileTask::initialize
262 void CompileTask::initialize(int compile_id,
263 methodHandle method,
264 int osr_bci,
265 int comp_level,
266 methodHandle hot_method,
267 int hot_count,
268 const char* comment,
269 bool is_blocking) {
270 assert(!_lock->is_locked(), "bad locking");
271
272 _compile_id = compile_id;
273 _method = method();
274 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
275 _osr_bci = osr_bci;
276 _is_blocking = is_blocking;
277 _comp_level = comp_level;
278 _num_inlined_bytecodes = 0;
279
280 _is_complete = false;
281 _is_success = false;
282 _code_handle = NULL;
283
284 _hot_method = NULL;
285 _hot_method_holder = NULL;
286 _hot_count = hot_count;
287 _time_queued = 0; // tidy
288 _comment = comment;
289
290 if (LogCompilation) {
291 _time_queued = os::elapsed_counter();
292 if (hot_method.not_null()) {
293 if (hot_method == method) {
294 _hot_method = _method;
295 } else {
296 _hot_method = hot_method();
297 // only add loader or mirror if different from _method_holder
298 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
299 }
300 }
301 }
302
303 _next = NULL;
304 }
305
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 }
318
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_holder);
325 JNIHandles::destroy_global(_hot_method_holder);
326 }
327
328
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 }
336
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 }
347
348
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_name(comp_level()));
362 print_compilation(st);
363 }
364
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_name(comp_level()));
371 print_compilation();
372 }
373
374
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
384
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' : ' ';
402
403 // print method attributes
404 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
405
406 if (TieredCompilation) {
407 if (comp_level != -1) st->print("%d ", comp_level);
408 else st->print("- ");
409 }
410 st->print(" "); // more indent
411
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 }
424
425 if (msg != NULL) {
426 st->print(" %s", msg);
427 }
428 if (!short_form) {
429 st->cr();
430 }
431 }
432
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
440
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' : ' ';
446
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 }
453
454 if (TieredCompilation) {
455 st->print(" ");
456 }
457 st->print(" "); // more indent
458 st->print(" "); // initial inlining indent
459
460 for (int i = 0; i < inline_level; i++) st->print(" ");
461
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)");
468
469 if (msg != NULL) {
470 st->print(" %s", msg);
471 }
472 st->cr();
473 }
474
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 }
491
492 // ------------------------------------------------------------------
493 // CompileTask::print_compilation
494 void CompileTask::print_compilation(outputStream* st, const char* msg, 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(), msg, short_form);
497 }
498
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);
505
506 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
507 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 }
523
524
525 // ------------------------------------------------------------------
526 // CompileTask::log_task_queued
527 void CompileTask::log_task_queued() {
528 Thread* thread = Thread::current();
529 ttyLocker ttyl;
530 ResourceMark rm(thread);
531
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 }
549
550
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 }
558
559
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);
566
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 }
587
588
589
590 // Add a CompileTask to a CompileQueue
591 void CompileQueue::add(CompileTask* task) {
592 assert(lock()->owned_by_self(), "must own lock");
593
594 task->set_next(NULL);
595 task->set_prev(NULL);
596
597 if (_last == NULL) {
598 // The compile queue is empty.
599 assert(_first == NULL, "queue is empty");
600 _first = task;
601 _last = task;
602 } else {
603 // Append the task to the queue.
604 assert(_last->next() == NULL, "not last");
605 _last->set_next(task);
606 task->set_prev(_last);
607 _last = task;
608 }
609 ++_size;
610
611 // Mark the method as being in the compile queue.
612 task->method()->set_queued_for_compilation();
613
614 if (CIPrintCompileQueue) {
615 print();
616 }
617
618 if (LogCompilation && xtty != NULL) {
619 task->log_task_queued();
620 }
621
622 // Notify CompilerThreads that a task is available.
623 lock()->notify_all();
624 }
625
626 void CompileQueue::delete_all() {
627 assert(lock()->owned_by_self(), "must own lock");
628 if (_first != NULL) {
629 for (CompileTask* task = _first; task != NULL; task = task->next()) {
630 delete task;
631 }
632 _first = NULL;
633 }
634 }
635
636 // ------------------------------------------------------------------
637 // CompileQueue::get
638 //
639 // Get the next CompileTask from a CompileQueue
640 CompileTask* CompileQueue::get() {
641 NMethodSweeper::possibly_sweep();
642
643 MutexLocker locker(lock());
644 // If _first is NULL we have no more compile jobs. There are two reasons for
645 // having no compile jobs: First, we compiled everything we wanted. Second,
646 // we ran out of code cache so compilation has been disabled. In the latter
647 // case we perform code cache sweeps to free memory such that we can re-enable
648 // compilation.
649 while (_first == NULL) {
650 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) {
651 // Wait a certain amount of time to possibly do another sweep.
652 // We must wait until stack scanning has happened so that we can
653 // transition a method's state from 'not_entrant' to 'zombie'.
654 long wait_time = NmethodSweepCheckInterval * 1000;
655 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) {
656 // Only one thread at a time can do sweeping. Scale the
657 // wait time according to the number of compiler threads.
658 // As a result, the next sweep is likely to happen every 100ms
659 // with an arbitrary number of threads that do sweeping.
660 wait_time = 100 * CICompilerCount;
661 }
662 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time);
663 if (timeout) {
664 MutexUnlocker ul(lock());
665 NMethodSweeper::possibly_sweep();
666 }
667 } else {
668 // If there are no compilation tasks and we can compile new jobs
669 // (i.e., there is enough free space in the code cache) there is
670 // no need to invoke the sweeper. As a result, the hotness of methods
671 // remains unchanged. This behavior is desired, since we want to keep
672 // the stable state, i.e., we do not want to evict methods from the
673 // code cache if it is unnecessary.
674 lock()->wait();
675 }
676 }
677 CompileTask* task = CompilationPolicy::policy()->select_task(this);
678 remove(task);
679 return task;
680 }
681
682 void CompileQueue::remove(CompileTask* task)
683 {
684 assert(lock()->owned_by_self(), "must own lock");
685 if (task->prev() != NULL) {
686 task->prev()->set_next(task->next());
687 } else {
688 // max is the first element
689 assert(task == _first, "Sanity");
690 _first = task->next();
691 }
692
693 if (task->next() != NULL) {
694 task->next()->set_prev(task->prev());
695 } else {
696 // max is the last element
697 assert(task == _last, "Sanity");
698 _last = task->prev();
699 }
700 --_size;
701 }
702
703 // methods in the compile queue need to be marked as used on the stack
704 // so that they don't get reclaimed by Redefine Classes
705 void CompileQueue::mark_on_stack() {
706 CompileTask* task = _first;
707 while (task != NULL) {
708 task->mark_on_stack();
709 task = task->next();
710 }
711 }
712
713 // ------------------------------------------------------------------
714 // CompileQueue::print
715 void CompileQueue::print() {
716 tty->print_cr("Contents of %s", name());
717 tty->print_cr("----------------------");
718 CompileTask* task = _first;
719 while (task != NULL) {
720 task->print_line();
721 task = task->next();
722 }
723 tty->print_cr("----------------------");
724 }
725
726 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
727
728 _current_method[0] = '\0';
729 _compile_type = CompileBroker::no_compile;
730
731 if (UsePerfData) {
732 ResourceMark rm;
733
734 // create the thread instance name space string - don't create an
735 // instance subspace if instance is -1 - keeps the adapterThread
736 // counters from having a ".0" namespace.
737 const char* thread_i = (instance == -1) ? thread_name :
738 PerfDataManager::name_space(thread_name, instance);
739
740
741 char* name = PerfDataManager::counter_name(thread_i, "method");
742 _perf_current_method =
743 PerfDataManager::create_string_variable(SUN_CI, name,
744 cmname_buffer_length,
745 _current_method, CHECK);
746
747 name = PerfDataManager::counter_name(thread_i, "type");
748 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
749 PerfData::U_None,
750 (jlong)_compile_type,
751 CHECK);
752
753 name = PerfDataManager::counter_name(thread_i, "time");
754 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
755 PerfData::U_Ticks, CHECK);
756
757 name = PerfDataManager::counter_name(thread_i, "compiles");
758 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
759 PerfData::U_Events, CHECK);
760 }
761 }
762
763 // ------------------------------------------------------------------
764 // CompileBroker::compilation_init
765 //
766 // Initialize the Compilation object
767 void CompileBroker::compilation_init() {
768 _last_method_compiled[0] = '\0';
769
770 #ifndef SHARK
771 // Set the interface to the current compiler(s).
772 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
773 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
774 #ifdef COMPILER1
775 if (c1_count > 0) {
776 _compilers[0] = new Compiler();
777 }
778 #endif // COMPILER1
779
780 #ifdef COMPILER2
781 if (c2_count > 0) {
782 _compilers[1] = new C2Compiler();
783 }
784 #endif // COMPILER2
785
786 #else // SHARK
787 int c1_count = 0;
788 int c2_count = 1;
789
790 _compilers[1] = new SharkCompiler();
791 #endif // SHARK
792
793 // Initialize the CompileTask free list
794 _task_free_list = NULL;
795
796 // Start the CompilerThreads
797 init_compiler_threads(c1_count, c2_count);
798 // totalTime performance counter is always created as it is required
799 // by the implementation of java.lang.management.CompilationMBean.
800 {
801 EXCEPTION_MARK;
802 _perf_total_compilation =
803 PerfDataManager::create_counter(JAVA_CI, "totalTime",
804 PerfData::U_Ticks, CHECK);
805 }
806
807
808 if (UsePerfData) {
809
810 EXCEPTION_MARK;
811
812 // create the jvmstat performance counters
813 _perf_osr_compilation =
814 PerfDataManager::create_counter(SUN_CI, "osrTime",
815 PerfData::U_Ticks, CHECK);
816
817 _perf_standard_compilation =
818 PerfDataManager::create_counter(SUN_CI, "standardTime",
819 PerfData::U_Ticks, CHECK);
820
821 _perf_total_bailout_count =
822 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
823 PerfData::U_Events, CHECK);
824
825 _perf_total_invalidated_count =
826 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
827 PerfData::U_Events, CHECK);
828
829 _perf_total_compile_count =
830 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
831 PerfData::U_Events, CHECK);
832 _perf_total_osr_compile_count =
833 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
834 PerfData::U_Events, CHECK);
835
836 _perf_total_standard_compile_count =
837 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
838 PerfData::U_Events, CHECK);
839
840 _perf_sum_osr_bytes_compiled =
841 PerfDataManager::create_counter(SUN_CI, "osrBytes",
842 PerfData::U_Bytes, CHECK);
843
844 _perf_sum_standard_bytes_compiled =
845 PerfDataManager::create_counter(SUN_CI, "standardBytes",
846 PerfData::U_Bytes, CHECK);
847
848 _perf_sum_nmethod_size =
849 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
850 PerfData::U_Bytes, CHECK);
851
852 _perf_sum_nmethod_code_size =
853 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
854 PerfData::U_Bytes, CHECK);
855
856 _perf_last_method =
857 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
858 CompilerCounters::cmname_buffer_length,
859 "", CHECK);
860
861 _perf_last_failed_method =
862 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
863 CompilerCounters::cmname_buffer_length,
864 "", CHECK);
865
866 _perf_last_invalidated_method =
867 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
868 CompilerCounters::cmname_buffer_length,
869 "", CHECK);
870
871 _perf_last_compile_type =
872 PerfDataManager::create_variable(SUN_CI, "lastType",
873 PerfData::U_None,
874 (jlong)CompileBroker::no_compile,
875 CHECK);
876
877 _perf_last_compile_size =
878 PerfDataManager::create_variable(SUN_CI, "lastSize",
879 PerfData::U_Bytes,
880 (jlong)CompileBroker::no_compile,
881 CHECK);
882
883
884 _perf_last_failed_type =
885 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
886 PerfData::U_None,
887 (jlong)CompileBroker::no_compile,
888 CHECK);
889
890 _perf_last_invalidated_type =
891 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
892 PerfData::U_None,
893 (jlong)CompileBroker::no_compile,
894 CHECK);
895 }
896
897 _initialized = true;
898 }
899
900
901 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
902 AbstractCompiler* comp, TRAPS) {
903 CompilerThread* compiler_thread = NULL;
904
905 Klass* k =
906 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
907 true, CHECK_0);
908 instanceKlassHandle klass (THREAD, k);
909 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
910 Handle string = java_lang_String::create_from_str(name, CHECK_0);
911
912 // Initialize thread_oop to put it into the system threadGroup
913 Handle thread_group (THREAD, Universe::system_thread_group());
914 JavaValue result(T_VOID);
915 JavaCalls::call_special(&result, thread_oop,
916 klass,
917 vmSymbols::object_initializer_name(),
918 vmSymbols::threadgroup_string_void_signature(),
919 thread_group,
920 string,
921 CHECK_0);
922
923 {
924 MutexLocker mu(Threads_lock, THREAD);
925 compiler_thread = new CompilerThread(queue, counters);
926 // At this point the new CompilerThread data-races with this startup
927 // thread (which I believe is the primoridal thread and NOT the VM
928 // thread). This means Java bytecodes being executed at startup can
929 // queue compile jobs which will run at whatever default priority the
930 // newly created CompilerThread runs at.
931
932
933 // At this point it may be possible that no osthread was created for the
934 // JavaThread due to lack of memory. We would have to throw an exception
935 // in that case. However, since this must work and we do not allow
936 // exceptions anyway, check and abort if this fails.
937
938 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
939 vm_exit_during_initialization("java.lang.OutOfMemoryError",
940 "unable to create new native thread");
941 }
942
943 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
944
945 // Note that this only sets the JavaThread _priority field, which by
946 // definition is limited to Java priorities and not OS priorities.
947 // The os-priority is set in the CompilerThread startup code itself
948
949 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
950
951 // Note that we cannot call os::set_priority because it expects Java
952 // priorities and we are *explicitly* using OS priorities so that it's
953 // possible to set the compiler thread priority higher than any Java
954 // thread.
955
956 int native_prio = CompilerThreadPriority;
957 if (native_prio == -1) {
958 if (UseCriticalCompilerThreadPriority) {
959 native_prio = os::java_to_os_priority[CriticalPriority];
960 } else {
961 native_prio = os::java_to_os_priority[NearMaxPriority];
962 }
963 }
964 os::set_native_priority(compiler_thread, native_prio);
965
966 java_lang_Thread::set_daemon(thread_oop());
967
968 compiler_thread->set_threadObj(thread_oop());
969 compiler_thread->set_compiler(comp);
970 Threads::add(compiler_thread);
971 Thread::start(compiler_thread);
972 }
973
974 // Let go of Threads_lock before yielding
975 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
976
977 return compiler_thread;
978 }
979
980
981 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
982 EXCEPTION_MARK;
983 #if !defined(ZERO) && !defined(SHARK)
984 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
985 #endif // !ZERO && !SHARK
986 // Initialize the compilation queue
987 if (c2_compiler_count > 0) {
988 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
989 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
990 }
991 if (c1_compiler_count > 0) {
992 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
993 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
994 }
995
996 int compiler_count = c1_compiler_count + c2_compiler_count;
997
998 _compiler_threads =
999 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
1000
1001 char name_buffer[256];
1002 for (int i = 0; i < c2_compiler_count; i++) {
1003 // Create a name for our thread.
1004 sprintf(name_buffer, "C2 CompilerThread%d", i);
1005 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1006 // Shark and C2
1007 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, _compilers[1], CHECK);
1008 _compiler_threads->append(new_thread);
1009 }
1010
1011 for (int i = c2_compiler_count; i < compiler_count; i++) {
1012 // Create a name for our thread.
1013 sprintf(name_buffer, "C1 CompilerThread%d", i);
1014 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1015 // C1
1016 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, _compilers[0], CHECK);
1017 _compiler_threads->append(new_thread);
1018 }
1019
1020 if (UsePerfData) {
1021 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
1022 }
1023 }
1024
1025
1026 // Set the methods on the stack as on_stack so that redefine classes doesn't
1027 // reclaim them
1028 void CompileBroker::mark_on_stack() {
1029 if (_c2_method_queue != NULL) {
1030 _c2_method_queue->mark_on_stack();
1031 }
1032 if (_c1_method_queue != NULL) {
1033 _c1_method_queue->mark_on_stack();
1034 }
1035 }
1036
1037 // ------------------------------------------------------------------
1038 // CompileBroker::compile_method
1039 //
1040 // Request compilation of a method.
1041 void CompileBroker::compile_method_base(methodHandle method,
1042 int osr_bci,
1043 int comp_level,
1044 methodHandle hot_method,
1045 int hot_count,
1046 const char* comment,
1047 Thread* thread) {
1048 // do nothing if compiler thread(s) is not available
1049 if (!_initialized ) {
1050 return;
1051 }
1052
1053 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1054 assert(method->method_holder()->oop_is_instance(),
1055 "sanity check");
1056 assert(!method->method_holder()->is_not_initialized(),
1057 "method holder must be initialized");
1058 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1059
1060 if (CIPrintRequests) {
1061 tty->print("request: ");
1062 method->print_short_name(tty);
1063 if (osr_bci != InvocationEntryBci) {
1064 tty->print(" osr_bci: %d", osr_bci);
1065 }
1066 tty->print(" comment: %s count: %d", comment, hot_count);
1067 if (!hot_method.is_null()) {
1068 tty->print(" hot: ");
1069 if (hot_method() != method()) {
1070 hot_method->print_short_name(tty);
1071 } else {
1072 tty->print("yes");
1073 }
1074 }
1075 tty->cr();
1076 }
1077
1078 // A request has been made for compilation. Before we do any
1079 // real work, check to see if the method has been compiled
1080 // in the meantime with a definitive result.
1081 if (compilation_is_complete(method, osr_bci, comp_level)) {
1082 return;
1083 }
1084
1085 #ifndef PRODUCT
1086 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1087 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1088 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1089 return;
1090 }
1091 }
1092 #endif
1093
1094 // If this method is already in the compile queue, then
1095 // we do not block the current thread.
1096 if (compilation_is_in_queue(method, osr_bci)) {
1097 // We may want to decay our counter a bit here to prevent
1098 // multiple denied requests for compilation. This is an
1099 // open compilation policy issue. Note: The other possibility,
1100 // in the case that this is a blocking compile request, is to have
1101 // all subsequent blocking requesters wait for completion of
1102 // ongoing compiles. Note that in this case we'll need a protocol
1103 // for freeing the associated compile tasks. [Or we could have
1104 // a single static monitor on which all these waiters sleep.]
1105 return;
1106 }
1107
1108 // If the requesting thread is holding the pending list lock
1109 // then we just return. We can't risk blocking while holding
1110 // the pending list lock or a 3-way deadlock may occur
1111 // between the reference handler thread, a GC (instigated
1112 // by a compiler thread), and compiled method registration.
1113 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1114 return;
1115 }
1116
1117 // Outputs from the following MutexLocker block:
1118 CompileTask* task = NULL;
1119 bool blocking = false;
1120 CompileQueue* queue = compile_queue(comp_level);
1121
1122 // Acquire our lock.
1123 {
1124 MutexLocker locker(queue->lock(), thread);
1125
1126 // Make sure the method has not slipped into the queues since
1127 // last we checked; note that those checks were "fast bail-outs".
1128 // Here we need to be more careful, see 14012000 below.
1129 if (compilation_is_in_queue(method, osr_bci)) {
1130 return;
1131 }
1132
1133 // We need to check again to see if the compilation has
1134 // completed. A previous compilation may have registered
1135 // some result.
1136 if (compilation_is_complete(method, osr_bci, comp_level)) {
1137 return;
1138 }
1139
1140 // We now know that this compilation is not pending, complete,
1141 // or prohibited. Assign a compile_id to this compilation
1142 // and check to see if it is in our [Start..Stop) range.
1143 uint compile_id = assign_compile_id(method, osr_bci);
1144 if (compile_id == 0) {
1145 // The compilation falls outside the allowed range.
1146 return;
1147 }
1148
1149 // Should this thread wait for completion of the compile?
1150 blocking = is_compile_blocking(method, osr_bci);
1151
1152 // We will enter the compilation in the queue.
1153 // 14012000: Note that this sets the queued_for_compile bits in
1154 // the target method. We can now reason that a method cannot be
1155 // queued for compilation more than once, as follows:
1156 // Before a thread queues a task for compilation, it first acquires
1157 // the compile queue lock, then checks if the method's queued bits
1158 // are set or it has already been compiled. Thus there can not be two
1159 // instances of a compilation task for the same method on the
1160 // compilation queue. Consider now the case where the compilation
1161 // thread has already removed a task for that method from the queue
1162 // and is in the midst of compiling it. In this case, the
1163 // queued_for_compile bits must be set in the method (and these
1164 // will be visible to the current thread, since the bits were set
1165 // under protection of the compile queue lock, which we hold now.
1166 // When the compilation completes, the compiler thread first sets
1167 // the compilation result and then clears the queued_for_compile
1168 // bits. Neither of these actions are protected by a barrier (or done
1169 // under the protection of a lock), so the only guarantee we have
1170 // (on machines with TSO (Total Store Order)) is that these values
1171 // will update in that order. As a result, the only combinations of
1172 // these bits that the current thread will see are, in temporal order:
1173 // <RESULT, QUEUE> :
1174 // <0, 1> : in compile queue, but not yet compiled
1175 // <1, 1> : compiled but queue bit not cleared
1176 // <1, 0> : compiled and queue bit cleared
1177 // Because we first check the queue bits then check the result bits,
1178 // we are assured that we cannot introduce a duplicate task.
1179 // Note that if we did the tests in the reverse order (i.e. check
1180 // result then check queued bit), we could get the result bit before
1181 // the compilation completed, and the queue bit after the compilation
1182 // completed, and end up introducing a "duplicate" (redundant) task.
1183 // In that case, the compiler thread should first check if a method
1184 // has already been compiled before trying to compile it.
1185 // NOTE: in the event that there are multiple compiler threads and
1186 // there is de-optimization/recompilation, things will get hairy,
1187 // and in that case it's best to protect both the testing (here) of
1188 // these bits, and their updating (here and elsewhere) under a
1189 // common lock.
1190 task = create_compile_task(queue,
1191 compile_id, method,
1192 osr_bci, comp_level,
1193 hot_method, hot_count, comment,
1194 blocking);
1195 }
1196
1197 if (blocking) {
1198 wait_for_completion(task);
1199 }
1200 }
1201
1202
1203 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1204 int comp_level,
1205 methodHandle hot_method, int hot_count,
1206 const char* comment, Thread* THREAD) {
1207 // make sure arguments make sense
1208 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1209 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1210 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1211 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1212 // allow any levels for WhiteBox
1213 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1214 // return quickly if possible
1215
1216 // lock, make sure that the compilation
1217 // isn't prohibited in a straightforward way.
1218 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1219 if (comp == NULL || !comp->can_compile_method(method) ||
1220 compilation_is_prohibited(method, osr_bci, comp_level)) {
1221 return NULL;
1222 }
1223
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)) {
1233 return NULL;
1234 }
1235 } else {
1236 // osr compilation
1237 #ifndef TIERED
1238 // seems like an assert of dubious value
1239 assert(comp_level == CompLevel_highest_tier,
1240 "all OSR compiles are assumed to be at a single compilation lavel");
1241 #endif // TIERED
1242 // We accept a higher level osr method
1243 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1244 if (nm != NULL) return nm;
1245 if (method->is_not_osr_compilable(comp_level)) return NULL;
1246 }
1247
1248 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1249 // some prerequisites that are compiler specific
1250 if (comp->is_c2() || comp->is_shark()) {
1251 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1252 // Resolve all classes seen in the signature of the method
1253 // we are compiling.
1254 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1255 }
1256
1257 // If the method is native, do the lookup in the thread requesting
1258 // the compilation. Native lookups can load code, which is not
1259 // permitted during compilation.
1260 //
1261 // Note: A native method implies non-osr compilation which is
1262 // checked with an assertion at the entry of this method.
1263 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1264 bool in_base_library;
1265 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1266 if (HAS_PENDING_EXCEPTION) {
1267 // In case of an exception looking up the method, we just forget
1268 // about it. The interpreter will kick-in and throw the exception.
1269 method->set_not_compilable(); // implies is_not_osr_compilable()
1270 CLEAR_PENDING_EXCEPTION;
1271 return NULL;
1272 }
1273 assert(method->has_native_function(), "must have native code by now");
1274 }
1275
1276 // RedefineClasses() has replaced this method; just return
1277 if (method->is_old()) {
1278 return NULL;
1279 }
1280
1281 // JVMTI -- post_compile_event requires jmethod_id() that may require
1282 // a lock the compiling thread can not acquire. Prefetch it here.
1283 if (JvmtiExport::should_post_compiled_method_load()) {
1284 method->jmethod_id();
1285 }
1286
1287 // If the compiler is shut off due to code cache getting full
1288 // fail out now so blocking compiles dont hang the java thread
1289 if (!should_compile_new_jobs()) {
1290 CompilationPolicy::policy()->delay_compilation(method());
1291 return NULL;
1292 }
1293
1294 // do the compilation
1295 if (method->is_native()) {
1296 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1297 // Acquire our lock.
1298 int compile_id;
1299 {
1300 MutexLocker locker(MethodCompileQueue_lock, THREAD);
1301 compile_id = assign_compile_id(method, standard_entry_bci);
1302 }
1303 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id);
1304 } else {
1305 return NULL;
1306 }
1307 } else {
1308 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1309 }
1310
1311 // return requested nmethod
1312 // We accept a higher level osr method
1313 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1314 }
1315
1316
1317 // ------------------------------------------------------------------
1318 // CompileBroker::compilation_is_complete
1319 //
1320 // See if compilation of this method is already complete.
1321 bool CompileBroker::compilation_is_complete(methodHandle method,
1322 int osr_bci,
1323 int comp_level) {
1324 bool is_osr = (osr_bci != standard_entry_bci);
1325 if (is_osr) {
1326 if (method->is_not_osr_compilable(comp_level)) {
1327 return true;
1328 } else {
1329 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1330 return (result != NULL);
1331 }
1332 } else {
1333 if (method->is_not_compilable(comp_level)) {
1334 return true;
1335 } else {
1336 nmethod* result = method->code();
1337 if (result == NULL) return false;
1338 return comp_level == result->comp_level();
1339 }
1340 }
1341 }
1342
1343
1344 // ------------------------------------------------------------------
1345 // CompileBroker::compilation_is_in_queue
1346 //
1347 // See if this compilation is already requested.
1348 //
1349 // Implementation note: there is only a single "is in queue" bit
1350 // for each method. This means that the check below is overly
1351 // conservative in the sense that an osr compilation in the queue
1352 // will block a normal compilation from entering the queue (and vice
1353 // versa). This can be remedied by a full queue search to disambiguate
1354 // cases. If it is deemed profitible, this may be done.
1355 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1356 int osr_bci) {
1357 return method->queued_for_compilation();
1358 }
1359
1360 // ------------------------------------------------------------------
1361 // CompileBroker::compilation_is_prohibited
1362 //
1363 // See if this compilation is not allowed.
1364 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1365 bool is_native = method->is_native();
1366 // Some compilers may not support the compilation of natives.
1367 AbstractCompiler *comp = compiler(comp_level);
1368 if (is_native &&
1369 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1370 method->set_not_compilable_quietly(comp_level);
1371 return true;
1372 }
1373
1374 bool is_osr = (osr_bci != standard_entry_bci);
1375 // Some compilers may not support on stack replacement.
1376 if (is_osr &&
1377 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1378 method->set_not_osr_compilable(comp_level);
1379 return true;
1380 }
1381
1382 // The method may be explicitly excluded by the user.
1383 bool quietly;
1384 if (CompilerOracle::should_exclude(method, quietly)) {
1385 if (!quietly) {
1386 // This does not happen quietly...
1387 ResourceMark rm;
1388 tty->print("### Excluding %s:%s",
1389 method->is_native() ? "generation of native wrapper" : "compile",
1390 (method->is_static() ? " static" : ""));
1391 method->print_short_name(tty);
1392 tty->cr();
1393 }
1394 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1395 }
1396
1397 return false;
1398 }
1399
1400
1401 // ------------------------------------------------------------------
1402 // CompileBroker::assign_compile_id
1403 //
1404 // Assign a serialized id number to this compilation request. If the
1405 // number falls out of the allowed range, return a 0. OSR
1406 // compilations may be numbered separately from regular compilations
1407 // if certain debugging flags are used.
1408 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1409 assert(MethodCompileQueue_lock->owner() == Thread::current(),
1410 "must hold the compilation queue lock");
1411 bool is_osr = (osr_bci != standard_entry_bci);
1412 uint id;
1413 if (CICountOSR && is_osr) {
1414 id = ++_osr_compilation_id;
1415 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1416 return id;
1417 }
1418 } else {
1419 id = ++_compilation_id;
1420 if ((uint)CIStart <= id && id < (uint)CIStop) {
1421 return id;
1422 }
1423 }
1424
1425 // Method was not in the appropriate compilation range.
1426 method->set_not_compilable_quietly();
1427 return 0;
1428 }
1429
1430
1431 // ------------------------------------------------------------------
1432 // CompileBroker::is_compile_blocking
1433 //
1434 // Should the current thread be blocked until this compilation request
1435 // has been fulfilled?
1436 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1437 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1438 return !BackgroundCompilation;
1439 }
1440
1441
1442 // ------------------------------------------------------------------
1443 // CompileBroker::preload_classes
1444 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1445 // Move this code over from c1_Compiler.cpp
1446 ShouldNotReachHere();
1447 }
1448
1449
1450 // ------------------------------------------------------------------
1451 // CompileBroker::create_compile_task
1452 //
1453 // Create a CompileTask object representing the current request for
1454 // compilation. Add this task to the queue.
1455 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1456 int compile_id,
1457 methodHandle method,
1458 int osr_bci,
1459 int comp_level,
1460 methodHandle hot_method,
1461 int hot_count,
1462 const char* comment,
1463 bool blocking) {
1464 CompileTask* new_task = allocate_task();
1465 new_task->initialize(compile_id, method, osr_bci, comp_level,
1466 hot_method, hot_count, comment,
1467 blocking);
1468 queue->add(new_task);
1469 return new_task;
1470 }
1471
1472
1473 // ------------------------------------------------------------------
1474 // CompileBroker::allocate_task
1475 //
1476 // Allocate a CompileTask, from the free list if possible.
1477 CompileTask* CompileBroker::allocate_task() {
1478 MutexLocker locker(CompileTaskAlloc_lock);
1479 CompileTask* task = NULL;
1480 if (_task_free_list != NULL) {
1481 task = _task_free_list;
1482 _task_free_list = task->next();
1483 task->set_next(NULL);
1484 } else {
1485 task = new CompileTask();
1486 task->set_next(NULL);
1487 }
1488 return task;
1489 }
1490
1491
1492 // ------------------------------------------------------------------
1493 // CompileBroker::free_task
1494 //
1495 // Add a task to the free list.
1496 void CompileBroker::free_task(CompileTask* task) {
1497 MutexLocker locker(CompileTaskAlloc_lock);
1498 task->free();
1499 task->set_next(_task_free_list);
1500 _task_free_list = task;
1501 }
1502
1503
1504 // ------------------------------------------------------------------
1505 // CompileBroker::wait_for_completion
1506 //
1507 // Wait for the given method CompileTask to complete.
1508 void CompileBroker::wait_for_completion(CompileTask* task) {
1509 if (CIPrintCompileQueue) {
1510 tty->print_cr("BLOCKING FOR COMPILE");
1511 }
1512
1513 assert(task->is_blocking(), "can only wait on blocking task");
1514
1515 JavaThread *thread = JavaThread::current();
1516 thread->set_blocked_on_compilation(true);
1517
1518 methodHandle method(thread, task->method());
1519 {
1520 MutexLocker waiter(task->lock(), thread);
1521
1522 while (!task->is_complete())
1523 task->lock()->wait();
1524 }
1525 // It is harmless to check this status without the lock, because
1526 // completion is a stable property (until the task object is recycled).
1527 assert(task->is_complete(), "Compilation should have completed");
1528 assert(task->code_handle() == NULL, "must be reset");
1529
1530 thread->set_blocked_on_compilation(false);
1531
1532 // By convention, the waiter is responsible for recycling a
1533 // blocking CompileTask. Since there is only one waiter ever
1534 // waiting on a CompileTask, we know that no one else will
1535 // be using this CompileTask; we can free it.
1536 free_task(task);
1537 }
1538
1539 // Initialize compiler thread(s) + compiler object(s).
1540 bool CompileBroker::init_compiler_runtime() {
1541 CompilerThread* thread = CompilerThread::current();
1542 AbstractCompiler* comp = thread->compiler();
1543 // Final sanity check - the compiler object must exist
1544 guarantee(comp != NULL, "Compiler object must exist");
1545
1546 int system_dictionary_modification_counter;
1547 {
1548 MutexLocker locker(Compile_lock, thread);
1549 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1550 }
1551
1552 {
1553 // Must switch to native to allocate ci_env
1554 ThreadToNativeFromVM ttn(thread);
1555 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1556 // Cache Jvmti state
1557 ci_env.cache_jvmti_state();
1558 // Cache DTrace flags
1559 ci_env.cache_dtrace_flags();
1560
1561 // Switch back to VM state to to compiler initialization
1562 ThreadInVMfromNative tv(thread);
1563 ResetNoHandleMark rnhm;
1564
1565 if (!comp->is_shark()) {
1566 // Perform per-thread and global initializations
1567 comp->initialize();
1568 }
1569 }
1570
1571 if (comp->is_state_failed()) {
1572 disable_compilation_forever();
1573 // If compiler initialization failed, no compiler thread that is specific to a
1574 // particular compiler runtime will ever start to compile methods.
1575
1576 // Tiered: If C1 and/or C2 initialization failed, we shut down all compilation.
1577 // We do this to keep things simple. This can be changed if it ever turns out to be
1578 // a problem.
1579
1580 if (comp->should_perform_shutdown()) {
1581 MutexLocker mu(MethodCompileQueue_lock, thread);
1582 CompileQueue* queue;
1583 if (_c1_method_queue != NULL) {
1584 _c1_method_queue->delete_all();
1585 queue = _c1_method_queue;
1586 _c1_method_queue = NULL;
1587 delete _c1_method_queue;
1588 }
1589
1590 if (_c2_method_queue != NULL) {
1591 _c2_method_queue->delete_all();
1592 queue = _c2_method_queue;
1593 _c2_method_queue = NULL;
1594 delete _c2_method_queue;
1595 }
1596 }
1597 warning("Initialization of %s failed -- shutting down compiler(s)", comp->name());
1598
1599 // Free buffer blob, if allocated
1600 if (thread->get_buffer_blob() != NULL) {
1601 CodeCache::free(thread->get_buffer_blob());
1602 }
1603
1604 // Set state to shut down
1605 comp->set_shut_down();
1606
1607 // Delete compiler runtimes
1608 MutexLocker mu(MethodCompileQueue_lock, thread);
1609 if ((comp->is_c1()) && (_compilers[0] != NULL)) {
1610 delete _compilers[0];
1611 _compilers[0] = NULL;
1612 }
1613
1614 if ((comp->is_c2()) && (_compilers[1] != NULL)) {
1615 delete _compilers[1];
1616 _compilers[1] = NULL;
1617 }
1618
1619 return false;
1620 }
1621
1622 // C1 specific check
1623 if ((comp->is_c1()) && (thread->get_buffer_blob() == NULL)) {
1624 warning("Initialization of %s thread failed", comp->name());
1625 return false;
1626 }
1627
1628 return true;
1629 }
1630
1631 // ------------------------------------------------------------------
1632 // CompileBroker::compiler_thread_loop
1633 //
1634 // The main loop run by a CompilerThread.
1635 void CompileBroker::compiler_thread_loop() {
1636 CompilerThread* thread = CompilerThread::current();
1637 CompileQueue* queue = thread->queue();
1638 // For the thread that initializes the ciObjectFactory
1639 // this resource mark holds all the shared objects
1640 ResourceMark rm;
1641
1642 // First thread to get here will initialize the compiler interface
1643
1644 if (!ciObjectFactory::is_initialized()) {
1645 ASSERT_IN_VM;
1646 MutexLocker only_one (CompileThread_lock, thread);
1647 if (!ciObjectFactory::is_initialized()) {
1648 ciObjectFactory::initialize();
1649 }
1650 }
1651
1652 // Open a log.
1653 if (LogCompilation) {
1654 init_compiler_thread_log();
1655 }
1656 CompileLog* log = thread->log();
1657 if (log != NULL) {
1658 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1659 thread->name(),
1660 os::current_thread_id(),
1661 os::current_process_id());
1662 log->stamp();
1663 log->end_elem();
1664 }
1665
1666 // If compiler thread/runtime initialization fails, exit the compiler thread
1667 if (!init_compiler_runtime()) {
1668 return;
1669 }
1670
1671 // Poll for new compilation tasks as long as the JVM runs. Compilation
1672 // should only be disabled if something went wrong while initializing the
1673 // compiler runtimes. This, in turn, should not happen. The only known case
1674 // when compiler runtime initialization fails is if there is not enough free
1675 // space in the code cache to generate the necessary stubs, etc.
1676 while (!is_compilation_disabled_forever()) {
1677 // We need this HandleMark to avoid leaking VM handles.
1678 HandleMark hm(thread);
1679
1680 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1681 // the code cache is really full
1682 handle_full_code_cache();
1683 }
1684
1685 CompileTask* task = queue->get();
1686
1687 // Give compiler threads an extra quanta. They tend to be bursty and
1688 // this helps the compiler to finish up the job.
1689 if( CompilerThreadHintNoPreempt )
1690 os::hint_no_preempt();
1691
1692 // trace per thread time and compile statistics
1693 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1694 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1695
1696 // Assign the task to the current thread. Mark this compilation
1697 // thread as active for the profiler.
1698 CompileTaskWrapper ctw(task);
1699 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1700 task->set_code_handle(&result_handle);
1701 methodHandle method(thread, task->method());
1702
1703 // Never compile a method if breakpoints are present in it
1704 if (method()->number_of_breakpoints() == 0) {
1705 // Compile the method.
1706 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1707 #ifdef COMPILER1
1708 // Allow repeating compilations for the purpose of benchmarking
1709 // compile speed. This is not useful for customers.
1710 if (CompilationRepeat != 0) {
1711 int compile_count = CompilationRepeat;
1712 while (compile_count > 0) {
1713 invoke_compiler_on_method(task);
1714 nmethod* nm = method->code();
1715 if (nm != NULL) {
1716 nm->make_zombie();
1717 method->clear_code();
1718 }
1719 compile_count--;
1720 }
1721 }
1722 #endif /* COMPILER1 */
1723 invoke_compiler_on_method(task);
1724 } else {
1725 // After compilation is disabled, remove remaining methods from queue
1726 method->clear_queued_for_compilation();
1727 }
1728 }
1729 }
1730 }
1731
1732 // ------------------------------------------------------------------
1733 // CompileBroker::init_compiler_thread_log
1734 //
1735 // Set up state required by +LogCompilation.
1736 void CompileBroker::init_compiler_thread_log() {
1737 CompilerThread* thread = CompilerThread::current();
1738 char file_name[4*K];
1739 FILE* fp = NULL;
1740 intx thread_id = os::current_thread_id();
1741 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1742 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1743 if (dir == NULL) {
1744 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1745 thread_id, os::current_process_id());
1746 } else {
1747 jio_snprintf(file_name, sizeof(file_name),
1748 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1749 os::file_separator(), thread_id, os::current_process_id());
1750 }
1751
1752 fp = fopen(file_name, "at");
1753 if (fp != NULL) {
1754 if (LogCompilation && Verbose) {
1755 tty->print_cr("Opening compilation log %s", file_name);
1756 }
1757 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1758 thread->init_log(log);
1759
1760 if (xtty != NULL) {
1761 ttyLocker ttyl;
1762 // Record any per thread log files
1763 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name);
1764 }
1765 return;
1766 }
1767 }
1768 warning("Cannot open log file: %s", file_name);
1769 }
1770
1771 // ------------------------------------------------------------------
1772 // CompileBroker::set_should_block
1773 //
1774 // Set _should_block.
1775 // Call this from the VM, with Threads_lock held and a safepoint requested.
1776 void CompileBroker::set_should_block() {
1777 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1778 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1779 #ifndef PRODUCT
1780 if (PrintCompilation && (Verbose || WizardMode))
1781 tty->print_cr("notifying compiler thread pool to block");
1782 #endif
1783 _should_block = true;
1784 }
1785
1786 // ------------------------------------------------------------------
1787 // CompileBroker::maybe_block
1788 //
1789 // Call this from the compiler at convenient points, to poll for _should_block.
1790 void CompileBroker::maybe_block() {
1791 if (_should_block) {
1792 #ifndef PRODUCT
1793 if (PrintCompilation && (Verbose || WizardMode))
1794 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1795 #endif
1796 ThreadInVMfromNative tivfn(JavaThread::current());
1797 }
1798 }
1799
1800 // wrapper for CodeCache::print_summary()
1801 static void codecache_print(bool detailed)
1802 {
1803 ResourceMark rm;
1804 stringStream s;
1805 // Dump code cache into a buffer before locking the tty,
1806 {
1807 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1808 CodeCache::print_summary(&s, detailed);
1809 }
1810 ttyLocker ttyl;
1811 tty->print(s.as_string());
1812 }
1813
1814 // ------------------------------------------------------------------
1815 // CompileBroker::invoke_compiler_on_method
1816 //
1817 // Compile a method.
1818 //
1819 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1820 if (PrintCompilation) {
1821 ResourceMark rm;
1822 task->print_line();
1823 }
1824 elapsedTimer time;
1825
1826 CompilerThread* thread = CompilerThread::current();
1827 ResourceMark rm(thread);
1828
1829 if (LogEvents) {
1830 _compilation_log->log_compile(thread, task);
1831 }
1832
1833 // Common flags.
1834 uint compile_id = task->compile_id();
1835 int osr_bci = task->osr_bci();
1836 bool is_osr = (osr_bci != standard_entry_bci);
1837 bool should_log = (thread->log() != NULL);
1838 bool should_break = false;
1839 int task_level = task->comp_level();
1840 {
1841 // create the handle inside it's own block so it can't
1842 // accidentally be referenced once the thread transitions to
1843 // native. The NoHandleMark before the transition should catch
1844 // any cases where this occurs in the future.
1845 methodHandle method(thread, task->method());
1846 should_break = check_break_at(method, compile_id, is_osr);
1847 if (should_log && !CompilerOracle::should_log(method)) {
1848 should_log = false;
1849 }
1850 assert(!method->is_native(), "no longer compile natives");
1851
1852 // Save information about this method in case of failure.
1853 set_last_compile(thread, method, is_osr, task_level);
1854
1855 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1856 }
1857
1858 // Allocate a new set of JNI handles.
1859 push_jni_handle_block();
1860 Method* target_handle = task->method();
1861 int compilable = ciEnv::MethodCompilable;
1862 {
1863 int system_dictionary_modification_counter;
1864 {
1865 MutexLocker locker(Compile_lock, thread);
1866 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1867 }
1868
1869 NoHandleMark nhm;
1870 ThreadToNativeFromVM ttn(thread);
1871
1872 ciEnv ci_env(task, system_dictionary_modification_counter);
1873 if (should_break) {
1874 ci_env.set_break_at_compile(true);
1875 }
1876 if (should_log) {
1877 ci_env.set_log(thread->log());
1878 }
1879 assert(thread->env() == &ci_env, "set by ci_env");
1880 // The thread-env() field is cleared in ~CompileTaskWrapper.
1881
1882 // Cache Jvmti state
1883 ci_env.cache_jvmti_state();
1884
1885 // Cache DTrace flags
1886 ci_env.cache_dtrace_flags();
1887
1888 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1889
1890 TraceTime t1("compilation", &time);
1891 EventCompilation event;
1892
1893 AbstractCompiler *comp = compiler(task_level);
1894 if (comp == NULL) {
1895 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1896 } else {
1897 comp->compile_method(&ci_env, target, osr_bci);
1898 }
1899
1900 if (!ci_env.failing() && task->code() == NULL) {
1901 //assert(false, "compiler should always document failure");
1902 // The compiler elected, without comment, not to register a result.
1903 // Do not attempt further compilations of this method.
1904 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1905 }
1906
1907 // Copy this bit to the enclosing block:
1908 compilable = ci_env.compilable();
1909
1910 if (ci_env.failing()) {
1911 const char* retry_message = ci_env.retry_message();
1912 if (_compilation_log != NULL) {
1913 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1914 }
1915 if (PrintCompilation) {
1916 FormatBufferResource msg = retry_message != NULL ?
1917 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1918 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1919 task->print_compilation(tty, msg);
1920 }
1921 } else {
1922 task->mark_success();
1923 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1924 if (_compilation_log != NULL) {
1925 nmethod* code = task->code();
1926 if (code != NULL) {
1927 _compilation_log->log_nmethod(thread, code);
1928 }
1929 }
1930 }
1931 // simulate crash during compilation
1932 assert(task->compile_id() != CICrashAt, "just as planned");
1933 if (event.should_commit()) {
1934 event.set_method(target->get_Method());
1935 event.set_compileID(compile_id);
1936 event.set_compileLevel(task->comp_level());
1937 event.set_succeded(task->is_success());
1938 event.set_isOsr(is_osr);
1939 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1940 event.set_inlinedBytes(task->num_inlined_bytecodes());
1941 event.commit();
1942 }
1943 }
1944 pop_jni_handle_block();
1945
1946 methodHandle method(thread, task->method());
1947
1948 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1949
1950 collect_statistics(thread, time, task);
1951
1952 if (PrintCompilation && PrintCompilation2) {
1953 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1954 tty->print("%4d ", compile_id); // print compilation number
1955 tty->print("%s ", (is_osr ? "%" : " "));
1956 if (task->code() != NULL) {
1957 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1958 }
1959 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1960 }
1961
1962 if (PrintCodeCacheOnCompilation)
1963 codecache_print(/* detailed= */ false);
1964
1965 // Disable compilation, if required.
1966 switch (compilable) {
1967 case ciEnv::MethodCompilable_never:
1968 if (is_osr)
1969 method->set_not_osr_compilable_quietly();
1970 else
1971 method->set_not_compilable_quietly();
1972 break;
1973 case ciEnv::MethodCompilable_not_at_tier:
1974 if (is_osr)
1975 method->set_not_osr_compilable_quietly(task_level);
1976 else
1977 method->set_not_compilable_quietly(task_level);
1978 break;
1979 }
1980
1981 // Note that the queued_for_compilation bits are cleared without
1982 // protection of a mutex. [They were set by the requester thread,
1983 // when adding the task to the complie queue -- at which time the
1984 // compile queue lock was held. Subsequently, we acquired the compile
1985 // queue lock to get this task off the compile queue; thus (to belabour
1986 // the point somewhat) our clearing of the bits must be occurring
1987 // only after the setting of the bits. See also 14012000 above.
1988 method->clear_queued_for_compilation();
1989
1990 #ifdef ASSERT
1991 if (CollectedHeap::fired_fake_oom()) {
1992 // The current compile received a fake OOM during compilation so
1993 // go ahead and exit the VM since the test apparently succeeded
1994 tty->print_cr("*** Shutting down VM after successful fake OOM");
1995 vm_exit(0);
1996 }
1997 #endif
1998 }
1999
2000 // ------------------------------------------------------------------
2001 // CompileBroker::handle_full_code_cache
2002 //
2003 // The CodeCache is full. Print out warning and disable compilation or
2004 // try code cache cleaning so compilation can continue later.
2005 void CompileBroker::handle_full_code_cache() {
2006 UseInterpreter = true;
2007 if (UseCompiler || AlwaysCompileLoopMethods ) {
2008 if (xtty != NULL) {
2009 ResourceMark rm;
2010 stringStream s;
2011 // Dump code cache state into a buffer before locking the tty,
2012 // because log_state() will use locks causing lock conflicts.
2013 CodeCache::log_state(&s);
2014 // Lock to prevent tearing
2015 ttyLocker ttyl;
2016 xtty->begin_elem("code_cache_full");
2017 xtty->print(s.as_string());
2018 xtty->stamp();
2019 xtty->end_elem();
2020 }
2021 warning("CodeCache is full. Compiler has been disabled.");
2022 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
2023
2024 CodeCache::report_codemem_full();
2025
2026
2027 #ifndef PRODUCT
2028 if (CompileTheWorld || ExitOnFullCodeCache) {
2029 codecache_print(/* detailed= */ true);
2030 before_exit(JavaThread::current());
2031 exit_globals(); // will delete tty
2032 vm_direct_exit(CompileTheWorld ? 0 : 1);
2033 }
2034 #endif
2035 if (UseCodeCacheFlushing) {
2036 // Since code cache is full, immediately stop new compiles
2037 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2038 NMethodSweeper::log_sweep("disable_compiler");
2039 NMethodSweeper::possibly_sweep();
2040 }
2041 } else {
2042 UseCompiler = false;
2043 AlwaysCompileLoopMethods = false;
2044 }
2045 }
2046 codecache_print(/* detailed= */ true);
2047 }
2048
2049 // ------------------------------------------------------------------
2050 // CompileBroker::set_last_compile
2051 //
2052 // Record this compilation for debugging purposes.
2053 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
2054 ResourceMark rm;
2055 char* method_name = method->name()->as_C_string();
2056 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2057 char current_method[CompilerCounters::cmname_buffer_length];
2058 size_t maxLen = CompilerCounters::cmname_buffer_length;
2059
2060 if (UsePerfData) {
2061 const char* class_name = method->method_holder()->name()->as_C_string();
2062
2063 size_t s1len = strlen(class_name);
2064 size_t s2len = strlen(method_name);
2065
2066 // check if we need to truncate the string
2067 if (s1len + s2len + 2 > maxLen) {
2068
2069 // the strategy is to lop off the leading characters of the
2070 // class name and the trailing characters of the method name.
2071
2072 if (s2len + 2 > maxLen) {
2073 // lop of the entire class name string, let snprintf handle
2074 // truncation of the method name.
2075 class_name += s1len; // null string
2076 }
2077 else {
2078 // lop off the extra characters from the front of the class name
2079 class_name += ((s1len + s2len + 2) - maxLen);
2080 }
2081 }
2082
2083 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2084 }
2085
2086 if (CICountOSR && is_osr) {
2087 _last_compile_type = osr_compile;
2088 } else {
2089 _last_compile_type = normal_compile;
2090 }
2091 _last_compile_level = comp_level;
2092
2093 if (UsePerfData) {
2094 CompilerCounters* counters = thread->counters();
2095 counters->set_current_method(current_method);
2096 counters->set_compile_type((jlong)_last_compile_type);
2097 }
2098 }
2099
2100
2101 // ------------------------------------------------------------------
2102 // CompileBroker::push_jni_handle_block
2103 //
2104 // Push on a new block of JNI handles.
2105 void CompileBroker::push_jni_handle_block() {
2106 JavaThread* thread = JavaThread::current();
2107
2108 // Allocate a new block for JNI handles.
2109 // Inlined code from jni_PushLocalFrame()
2110 JNIHandleBlock* java_handles = thread->active_handles();
2111 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2112 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2113 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2114 thread->set_active_handles(compile_handles);
2115 }
2116
2117
2118 // ------------------------------------------------------------------
2119 // CompileBroker::pop_jni_handle_block
2120 //
2121 // Pop off the current block of JNI handles.
2122 void CompileBroker::pop_jni_handle_block() {
2123 JavaThread* thread = JavaThread::current();
2124
2125 // Release our JNI handle block
2126 JNIHandleBlock* compile_handles = thread->active_handles();
2127 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2128 thread->set_active_handles(java_handles);
2129 compile_handles->set_pop_frame_link(NULL);
2130 JNIHandleBlock::release_block(compile_handles, thread); // may block
2131 }
2132
2133
2134 // ------------------------------------------------------------------
2135 // CompileBroker::check_break_at
2136 //
2137 // Should the compilation break at the current compilation.
2138 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2139 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2140 return true;
2141 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2142 return true;
2143 } else {
2144 return (compile_id == CIBreakAt);
2145 }
2146 }
2147
2148 // ------------------------------------------------------------------
2149 // CompileBroker::collect_statistics
2150 //
2151 // Collect statistics about the compilation.
2152
2153 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2154 bool success = task->is_success();
2155 methodHandle method (thread, task->method());
2156 uint compile_id = task->compile_id();
2157 bool is_osr = (task->osr_bci() != standard_entry_bci);
2158 nmethod* code = task->code();
2159 CompilerCounters* counters = thread->counters();
2160
2161 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2162 MutexLocker locker(CompileStatistics_lock);
2163
2164 // _perf variables are production performance counters which are
2165 // updated regardless of the setting of the CITime and CITimeEach flags
2166 //
2167 if (!success) {
2168 _total_bailout_count++;
2169 if (UsePerfData) {
2170 _perf_last_failed_method->set_value(counters->current_method());
2171 _perf_last_failed_type->set_value(counters->compile_type());
2172 _perf_total_bailout_count->inc();
2173 }
2174 } else if (code == NULL) {
2175 if (UsePerfData) {
2176 _perf_last_invalidated_method->set_value(counters->current_method());
2177 _perf_last_invalidated_type->set_value(counters->compile_type());
2178 _perf_total_invalidated_count->inc();
2179 }
2180 _total_invalidated_count++;
2181 } else {
2182 // Compilation succeeded
2183
2184 // update compilation ticks - used by the implementation of
2185 // java.lang.management.CompilationMBean
2186 _perf_total_compilation->inc(time.ticks());
2187
2188 _t_total_compilation.add(time);
2189 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2190
2191 if (CITime) {
2192 if (is_osr) {
2193 _t_osr_compilation.add(time);
2194 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2195 } else {
2196 _t_standard_compilation.add(time);
2197 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2198 }
2199 }
2200
2201 if (UsePerfData) {
2202 // save the name of the last method compiled
2203 _perf_last_method->set_value(counters->current_method());
2204 _perf_last_compile_type->set_value(counters->compile_type());
2205 _perf_last_compile_size->set_value(method->code_size() +
2206 task->num_inlined_bytecodes());
2207 if (is_osr) {
2208 _perf_osr_compilation->inc(time.ticks());
2209 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2210 } else {
2211 _perf_standard_compilation->inc(time.ticks());
2212 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2213 }
2214 }
2215
2216 if (CITimeEach) {
2217 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2218 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2219 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2220 }
2221
2222 // Collect counts of successful compilations
2223 _sum_nmethod_size += code->total_size();
2224 _sum_nmethod_code_size += code->insts_size();
2225 _total_compile_count++;
2226
2227 if (UsePerfData) {
2228 _perf_sum_nmethod_size->inc( code->total_size());
2229 _perf_sum_nmethod_code_size->inc(code->insts_size());
2230 _perf_total_compile_count->inc();
2231 }
2232
2233 if (is_osr) {
2234 if (UsePerfData) _perf_total_osr_compile_count->inc();
2235 _total_osr_compile_count++;
2236 } else {
2237 if (UsePerfData) _perf_total_standard_compile_count->inc();
2238 _total_standard_compile_count++;
2239 }
2240 }
2241 // set the current method for the thread to null
2242 if (UsePerfData) counters->set_current_method("");
2243 }
2244
2245 const char* CompileBroker::compiler_name(int comp_level) {
2246 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2247 if (comp == NULL) {
2248 return "no compiler";
2249 } else {
2250 return (comp->name());
2251 }
2252 }
2253
2254 void CompileBroker::print_times() {
2255 tty->cr();
2256 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2257 tty->print_cr("------------------------------------------------");
2258 //0000000000111111111122222222223333333333444444444455555555556666666666
2259 //0123456789012345678901234567890123456789012345678901234567890123456789
2260 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2261 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2262 CompileBroker::_t_standard_compilation.seconds(),
2263 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2264 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);
2265
2266 AbstractCompiler *comp = compiler(CompLevel_simple);
2267 if (comp != NULL) {
2268 comp->print_timers();
2269 }
2270 comp = compiler(CompLevel_full_optimization);
2271 if (comp != NULL) {
2272 comp->print_timers();
2273 }
2274 tty->cr();
2275 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2276 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2277 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2278 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2279 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2280 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2281 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2282 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2283 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2284 tty->cr();
2285 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2286 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2287 }
2288
2289 // Debugging output for failure
2290 void CompileBroker::print_last_compile() {
2291 if ( _last_compile_level != CompLevel_none &&
2292 compiler(_last_compile_level) != NULL &&
2293 _last_method_compiled != NULL &&
2294 _last_compile_type != no_compile) {
2295 if (_last_compile_type == osr_compile) {
2296 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2297 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2298 } else {
2299 tty->print_cr("Last parse: %d+++(%d) %s",
2300 _compilation_id, _last_compile_level, _last_method_compiled);
2301 }
2302 }
2303 }
2304
2305
2306 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2307 #ifndef PRODUCT
2308 st->print_cr("Compiler thread printing unimplemented.");
2309 st->cr();
2310 #endif
2311 }