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::_print_compilation_warning = 0;
130 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
131
132 // The installed compiler(s)
133 AbstractCompiler* CompileBroker::_compilers[2];
134
135 // These counters are used to assign each compilation an unique ID
136 volatile jint CompileBroker::_compilation_id = 0;
137 volatile jint CompileBroker::_osr_compilation_id = 0;
138
139 // Debugging information
140 int CompileBroker::_last_compile_type = no_compile;
141 int CompileBroker::_last_compile_level = CompLevel_none;
142 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
143
144 // Performance counters
145 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
146 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
147 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
148
149 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
150 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
151 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
152 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
153 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
154
155 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
156 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
157 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
158 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
159
160 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
161 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
162 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
163 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
164 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
165 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
166 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
167
168 // Timers and counters for generating statistics
169 elapsedTimer CompileBroker::_t_total_compilation;
170 elapsedTimer CompileBroker::_t_osr_compilation;
171 elapsedTimer CompileBroker::_t_standard_compilation;
172
173 int CompileBroker::_total_bailout_count = 0;
174 int CompileBroker::_total_invalidated_count = 0;
175 int CompileBroker::_total_compile_count = 0;
176 int CompileBroker::_total_osr_compile_count = 0;
177 int CompileBroker::_total_standard_compile_count = 0;
178
179 int CompileBroker::_sum_osr_bytes_compiled = 0;
180 int CompileBroker::_sum_standard_bytes_compiled = 0;
181 int CompileBroker::_sum_nmethod_size = 0;
182 int CompileBroker::_sum_nmethod_code_size = 0;
183
184 long CompileBroker::_peak_compilation_time = 0;
185
186 CompileQueue* CompileBroker::_c2_method_queue = NULL;
187 CompileQueue* CompileBroker::_c1_method_queue = NULL;
188 CompileTask* CompileBroker::_task_free_list = NULL;
189
190 GrowableArray<CompilerThread*>* CompileBroker::_compiler_threads = NULL;
191
192
193 class CompilationLog : public StringEventLog {
194 public:
195 CompilationLog() : StringEventLog("Compilation events") {
196 }
197
198 void log_compile(JavaThread* thread, CompileTask* task) {
199 StringLogMessage lm;
200 stringStream sstr = lm.stream();
201 // msg.time_stamp().update_to(tty->time_stamp().ticks());
202 task->print_compilation(&sstr, NULL, true);
203 log(thread, "%s", (const char*)lm);
204 }
205
206 void log_nmethod(JavaThread* thread, nmethod* nm) {
207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
208 nm->compile_id(), nm->is_osr_method() ? "%" : "",
209 nm, nm->code_begin(), nm->code_end());
210 }
211
212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
213 StringLogMessage lm;
214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
215 if (retry_message != NULL) {
216 lm.append(" (%s)", retry_message);
217 }
218 lm.print("\n");
219 log(thread, "%s", (const char*)lm);
220 }
221 };
222
223 static CompilationLog* _compilation_log = NULL;
224
225 void compileBroker_init() {
226 if (LogEvents) {
227 _compilation_log = new CompilationLog();
228 }
229 }
230
231 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
232 CompilerThread* thread = CompilerThread::current();
233 thread->set_task(task);
234 CompileLog* log = thread->log();
235 if (log != NULL) task->log_task_start(log);
236 }
237
238 CompileTaskWrapper::~CompileTaskWrapper() {
239 CompilerThread* thread = CompilerThread::current();
240 CompileTask* task = thread->task();
241 CompileLog* log = thread->log();
242 if (log != NULL) task->log_task_done(log);
243 thread->set_task(NULL);
244 task->set_code_handle(NULL);
245 thread->set_env(NULL);
246 if (task->is_blocking()) {
247 MutexLocker notifier(task->lock(), thread);
248 task->mark_complete();
249 // Notify the waiting thread that the compilation has completed.
250 task->lock()->notify_all();
251 } else {
252 task->mark_complete();
253
254 // By convention, the compiling thread is responsible for
255 // recycling a non-blocking CompileTask.
256 CompileBroker::free_task(task);
257 }
258 }
259
260
261 // ------------------------------------------------------------------
262 // CompileTask::initialize
263 void CompileTask::initialize(int compile_id,
264 methodHandle method,
265 int osr_bci,
266 int comp_level,
267 methodHandle hot_method,
268 int hot_count,
269 const char* comment,
270 bool is_blocking) {
271 assert(!_lock->is_locked(), "bad locking");
272
273 _compile_id = compile_id;
274 _method = method();
275 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
276 _osr_bci = osr_bci;
277 _is_blocking = is_blocking;
278 _comp_level = comp_level;
279 _num_inlined_bytecodes = 0;
280
281 _is_complete = false;
282 _is_success = false;
283 _code_handle = NULL;
284
285 _hot_method = NULL;
286 _hot_method_holder = NULL;
287 _hot_count = hot_count;
288 _time_queued = 0; // tidy
289 _comment = comment;
290
291 if (LogCompilation) {
292 _time_queued = os::elapsed_counter();
293 if (hot_method.not_null()) {
294 if (hot_method == method) {
295 _hot_method = _method;
296 } else {
297 _hot_method = hot_method();
298 // only add loader or mirror if different from _method_holder
299 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
300 }
301 }
302 }
303
304 _next = NULL;
305 }
306
307 // ------------------------------------------------------------------
308 // CompileTask::code/set_code
309 nmethod* CompileTask::code() const {
310 if (_code_handle == NULL) return NULL;
311 return _code_handle->code();
312 }
313 void CompileTask::set_code(nmethod* nm) {
314 if (_code_handle == NULL && nm == NULL) return;
315 guarantee(_code_handle != NULL, "");
316 _code_handle->set_code(nm);
317 if (nm == NULL) _code_handle = NULL; // drop the handle also
318 }
319
320 // ------------------------------------------------------------------
321 // CompileTask::free
322 void CompileTask::free() {
323 set_code(NULL);
324 assert(!_lock->is_locked(), "Should not be locked when freed");
325 JNIHandles::destroy_global(_method_holder);
326 JNIHandles::destroy_global(_hot_method_holder);
327 }
328
329
330 void CompileTask::mark_on_stack() {
331 // Mark these methods as something redefine classes cannot remove.
332 _method->set_on_stack(true);
333 if (_hot_method != NULL) {
334 _hot_method->set_on_stack(true);
335 }
336 }
337
338 // ------------------------------------------------------------------
339 // CompileTask::print
340 void CompileTask::print() {
341 tty->print("<CompileTask compile_id=%d ", _compile_id);
342 tty->print("method=");
343 _method->print_name(tty);
344 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
345 _osr_bci, bool_to_str(_is_blocking),
346 bool_to_str(_is_complete), bool_to_str(_is_success));
347 }
348
349
350 // ------------------------------------------------------------------
351 // CompileTask::print_line_on_error
352 //
353 // This function is called by fatal error handler when the thread
354 // causing troubles is a compiler thread.
355 //
356 // Do not grab any lock, do not allocate memory.
357 //
358 // Otherwise it's the same as CompileTask::print_line()
359 //
360 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
361 // print compiler name
362 st->print("%s:", CompileBroker::compiler_name(comp_level()));
363 print_compilation(st);
364 }
365
366 // ------------------------------------------------------------------
367 // CompileTask::print_line
368 void CompileTask::print_line() {
369 ttyLocker ttyl; // keep the following output all in one block
370 // print compiler name if requested
371 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
372 print_compilation();
373 }
374
375
376 // ------------------------------------------------------------------
377 // CompileTask::print_compilation_impl
378 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
379 bool is_osr_method, int osr_bci, bool is_blocking,
380 const char* msg, bool short_form) {
381 if (!short_form) {
382 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
383 }
384 st->print("%4d ", compile_id); // print compilation number
385
386 // For unloaded methods the transition to zombie occurs after the
387 // method is cleared so it's impossible to report accurate
388 // information for that case.
389 bool is_synchronized = false;
390 bool has_exception_handler = false;
391 bool is_native = false;
392 if (method != NULL) {
393 is_synchronized = method->is_synchronized();
394 has_exception_handler = method->has_exception_handler();
395 is_native = method->is_native();
396 }
397 // method attributes
398 const char compile_type = is_osr_method ? '%' : ' ';
399 const char sync_char = is_synchronized ? 's' : ' ';
400 const char exception_char = has_exception_handler ? '!' : ' ';
401 const char blocking_char = is_blocking ? 'b' : ' ';
402 const char native_char = is_native ? 'n' : ' ';
403
404 // print method attributes
405 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
406
407 if (TieredCompilation) {
408 if (comp_level != -1) st->print("%d ", comp_level);
409 else st->print("- ");
410 }
411 st->print(" "); // more indent
412
413 if (method == NULL) {
414 st->print("(method)");
415 } else {
416 method->print_short_name(st);
417 if (is_osr_method) {
418 st->print(" @ %d", osr_bci);
419 }
420 if (method->is_native())
421 st->print(" (native)");
422 else
423 st->print(" (%d bytes)", method->code_size());
424 }
425
426 if (msg != NULL) {
427 st->print(" %s", msg);
428 }
429 if (!short_form) {
430 st->cr();
431 }
432 }
433
434 // ------------------------------------------------------------------
435 // CompileTask::print_inlining
436 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
437 // 1234567
438 st->print(" "); // print timestamp
439 // 1234
440 st->print(" "); // print compilation number
441
442 // method attributes
443 if (method->is_loaded()) {
444 const char sync_char = method->is_synchronized() ? 's' : ' ';
445 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
446 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
447
448 // print method attributes
449 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
450 } else {
451 // %s!bn
452 st->print(" "); // print method attributes
453 }
454
455 if (TieredCompilation) {
456 st->print(" ");
457 }
458 st->print(" "); // more indent
459 st->print(" "); // initial inlining indent
460
461 for (int i = 0; i < inline_level; i++) st->print(" ");
462
463 st->print("@ %d ", bci); // print bci
464 method->print_short_name(st);
465 if (method->is_loaded())
466 st->print(" (%d bytes)", method->code_size());
467 else
468 st->print(" (not loaded)");
469
470 if (msg != NULL) {
471 st->print(" %s", msg);
472 }
473 st->cr();
474 }
475
476 // ------------------------------------------------------------------
477 // CompileTask::print_inline_indent
478 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
479 // 1234567
480 st->print(" "); // print timestamp
481 // 1234
482 st->print(" "); // print compilation number
483 // %s!bn
484 st->print(" "); // print method attributes
485 if (TieredCompilation) {
486 st->print(" ");
487 }
488 st->print(" "); // more indent
489 st->print(" "); // initial inlining indent
490 for (int i = 0; i < inline_level; i++) st->print(" ");
491 }
492
493 // ------------------------------------------------------------------
494 // CompileTask::print_compilation
495 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) {
496 bool is_osr_method = osr_bci() != InvocationEntryBci;
497 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form);
498 }
499
500 // ------------------------------------------------------------------
501 // CompileTask::log_task
502 void CompileTask::log_task(xmlStream* log) {
503 Thread* thread = Thread::current();
504 methodHandle method(thread, this->method());
505 ResourceMark rm(thread);
506
507 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
508 log->print(" compile_id='%d'", _compile_id);
509 if (_osr_bci != CompileBroker::standard_entry_bci) {
510 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
511 } // else compile_kind='c2c'
512 if (!method.is_null()) log->method(method);
513 if (_osr_bci != CompileBroker::standard_entry_bci) {
514 log->print(" osr_bci='%d'", _osr_bci);
515 }
516 if (_comp_level != CompLevel_highest_tier) {
517 log->print(" level='%d'", _comp_level);
518 }
519 if (_is_blocking) {
520 log->print(" blocking='1'");
521 }
522 log->stamp();
523 }
524
525
526 // ------------------------------------------------------------------
527 // CompileTask::log_task_queued
528 void CompileTask::log_task_queued() {
529 Thread* thread = Thread::current();
530 ttyLocker ttyl;
531 ResourceMark rm(thread);
532
533 xtty->begin_elem("task_queued");
534 log_task(xtty);
535 if (_comment != NULL) {
536 xtty->print(" comment='%s'", _comment);
537 }
538 if (_hot_method != NULL) {
539 methodHandle hot(thread, _hot_method);
540 methodHandle method(thread, _method);
541 if (hot() != method()) {
542 xtty->method(hot);
543 }
544 }
545 if (_hot_count != 0) {
546 xtty->print(" hot_count='%d'", _hot_count);
547 }
548 xtty->end_elem();
549 }
550
551
552 // ------------------------------------------------------------------
553 // CompileTask::log_task_start
554 void CompileTask::log_task_start(CompileLog* log) {
555 log->begin_head("task");
556 log_task(log);
557 log->end_head();
558 }
559
560
561 // ------------------------------------------------------------------
562 // CompileTask::log_task_done
563 void CompileTask::log_task_done(CompileLog* log) {
564 Thread* thread = Thread::current();
565 methodHandle method(thread, this->method());
566 ResourceMark rm(thread);
567
568 // <task_done ... stamp='1.234'> </task>
569 nmethod* nm = code();
570 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
571 _is_success, nm == NULL ? 0 : nm->content_size(),
572 method->invocation_count());
573 int bec = method->backedge_count();
574 if (bec != 0) log->print(" backedge_count='%d'", bec);
575 // Note: "_is_complete" is about to be set, but is not.
576 if (_num_inlined_bytecodes != 0) {
577 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
578 }
579 log->stamp();
580 log->end_elem();
581 log->tail("task");
582 log->clear_identities(); // next task will have different CI
583 if (log->unflushed_count() > 2000) {
584 log->flush();
585 }
586 log->mark_file_end();
587 }
588
589
590
591 // Add a CompileTask to a CompileQueue
592 void CompileQueue::add(CompileTask* task) {
593 assert(lock()->owned_by_self(), "must own lock");
594
595 task->set_next(NULL);
596 task->set_prev(NULL);
597
598 if (_last == NULL) {
599 // The compile queue is empty.
600 assert(_first == NULL, "queue is empty");
601 _first = task;
602 _last = task;
603 } else {
604 // Append the task to the queue.
605 assert(_last->next() == NULL, "not last");
606 _last->set_next(task);
607 task->set_prev(_last);
608 _last = task;
609 }
610 ++_size;
611
612 // Mark the method as being in the compile queue.
613 task->method()->set_queued_for_compilation();
614
615 if (CIPrintCompileQueue) {
616 print();
617 }
618
619 if (LogCompilation && xtty != NULL) {
620 task->log_task_queued();
621 }
622
623 // Notify CompilerThreads that a task is available.
624 lock()->notify_all();
625 }
626
627 void CompileQueue::delete_all() {
628 assert(lock()->owned_by_self(), "must own lock");
629 if (_first != NULL) {
630 for (CompileTask* task = _first; task != NULL; task = task->next()) {
631 delete task;
632 }
633 _first = NULL;
634 }
635 }
636
637 // ------------------------------------------------------------------
638 // CompileQueue::get
639 //
640 // Get the next CompileTask from a CompileQueue
641 CompileTask* CompileQueue::get() {
642 NMethodSweeper::possibly_sweep();
643
644 MutexLocker locker(lock());
645 // If _first is NULL we have no more compile jobs. There are two reasons for
646 // having no compile jobs: First, we compiled everything we wanted. Second,
647 // we ran out of code cache so compilation has been disabled. In the latter
648 // case we perform code cache sweeps to free memory such that we can re-enable
649 // compilation.
650 while (_first == NULL) {
651 // Exit loop if compilation is disabled forever
652 if (CompileBroker::is_compilation_disabled_forever()) {
653 return NULL;
654 }
655
656 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) {
657 // Wait a certain amount of time to possibly do another sweep.
658 // We must wait until stack scanning has happened so that we can
659 // transition a method's state from 'not_entrant' to 'zombie'.
660 long wait_time = NmethodSweepCheckInterval * 1000;
661 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) {
662 // Only one thread at a time can do sweeping. Scale the
663 // wait time according to the number of compiler threads.
664 // As a result, the next sweep is likely to happen every 100ms
665 // with an arbitrary number of threads that do sweeping.
666 wait_time = 100 * CICompilerCount;
667 }
668 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time);
669 if (timeout) {
670 MutexUnlocker ul(lock());
671 NMethodSweeper::possibly_sweep();
672 }
673 } else {
674 // If there are no compilation tasks and we can compile new jobs
675 // (i.e., there is enough free space in the code cache) there is
676 // no need to invoke the sweeper. As a result, the hotness of methods
677 // remains unchanged. This behavior is desired, since we want to keep
678 // the stable state, i.e., we do not want to evict methods from the
679 // code cache if it is unnecessary.
680 // We need a timed wait here, since compiler threads can exit if compilation
681 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
682 // is not critical and we do not want idle compiler threads to wake up too often.
683 lock()->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
684 }
685 }
686
687 if (CompileBroker::is_compilation_disabled_forever()) {
688 return NULL;
689 }
690
691 CompileTask* task = CompilationPolicy::policy()->select_task(this);
692 remove(task);
693 return task;
694 }
695
696 void CompileQueue::remove(CompileTask* task)
697 {
698 assert(lock()->owned_by_self(), "must own lock");
699 if (task->prev() != NULL) {
700 task->prev()->set_next(task->next());
701 } else {
702 // max is the first element
703 assert(task == _first, "Sanity");
704 _first = task->next();
705 }
706
707 if (task->next() != NULL) {
708 task->next()->set_prev(task->prev());
709 } else {
710 // max is the last element
711 assert(task == _last, "Sanity");
712 _last = task->prev();
713 }
714 --_size;
715 }
716
717 // methods in the compile queue need to be marked as used on the stack
718 // so that they don't get reclaimed by Redefine Classes
719 void CompileQueue::mark_on_stack() {
720 CompileTask* task = _first;
721 while (task != NULL) {
722 task->mark_on_stack();
723 task = task->next();
724 }
725 }
726
727 // ------------------------------------------------------------------
728 // CompileQueue::print
729 void CompileQueue::print() {
730 tty->print_cr("Contents of %s", name());
731 tty->print_cr("----------------------");
732 CompileTask* task = _first;
733 while (task != NULL) {
734 task->print_line();
735 task = task->next();
736 }
737 tty->print_cr("----------------------");
738 }
739
740 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
741
742 _current_method[0] = '\0';
743 _compile_type = CompileBroker::no_compile;
744
745 if (UsePerfData) {
746 ResourceMark rm;
747
748 // create the thread instance name space string - don't create an
749 // instance subspace if instance is -1 - keeps the adapterThread
750 // counters from having a ".0" namespace.
751 const char* thread_i = (instance == -1) ? thread_name :
752 PerfDataManager::name_space(thread_name, instance);
753
754
755 char* name = PerfDataManager::counter_name(thread_i, "method");
756 _perf_current_method =
757 PerfDataManager::create_string_variable(SUN_CI, name,
758 cmname_buffer_length,
759 _current_method, CHECK);
760
761 name = PerfDataManager::counter_name(thread_i, "type");
762 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
763 PerfData::U_None,
764 (jlong)_compile_type,
765 CHECK);
766
767 name = PerfDataManager::counter_name(thread_i, "time");
768 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
769 PerfData::U_Ticks, CHECK);
770
771 name = PerfDataManager::counter_name(thread_i, "compiles");
772 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
773 PerfData::U_Events, CHECK);
774 }
775 }
776
777 // ------------------------------------------------------------------
778 // CompileBroker::compilation_init
779 //
780 // Initialize the Compilation object
781 void CompileBroker::compilation_init() {
782 _last_method_compiled[0] = '\0';
783
784 // No need to initialize compilation system if we do not use it.
785 if (!UseCompiler) {
786 return;
787 }
788 #ifndef SHARK
789 // Set the interface to the current compiler(s).
790 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
791 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
792 #ifdef COMPILER1
793 if (c1_count > 0) {
794 _compilers[0] = new Compiler();
795 }
796 #endif // COMPILER1
797
798 #ifdef COMPILER2
799 if (c2_count > 0) {
800 _compilers[1] = new C2Compiler();
801 }
802 #endif // COMPILER2
803
804 #else // SHARK
805 int c1_count = 0;
806 int c2_count = 1;
807
808 _compilers[1] = new SharkCompiler();
809 #endif // SHARK
810
811 // Initialize the CompileTask free list
812 _task_free_list = NULL;
813
814 // Start the CompilerThreads
815 init_compiler_threads(c1_count, c2_count);
816 // totalTime performance counter is always created as it is required
817 // by the implementation of java.lang.management.CompilationMBean.
818 {
819 EXCEPTION_MARK;
820 _perf_total_compilation =
821 PerfDataManager::create_counter(JAVA_CI, "totalTime",
822 PerfData::U_Ticks, CHECK);
823 }
824
825
826 if (UsePerfData) {
827
828 EXCEPTION_MARK;
829
830 // create the jvmstat performance counters
831 _perf_osr_compilation =
832 PerfDataManager::create_counter(SUN_CI, "osrTime",
833 PerfData::U_Ticks, CHECK);
834
835 _perf_standard_compilation =
836 PerfDataManager::create_counter(SUN_CI, "standardTime",
837 PerfData::U_Ticks, CHECK);
838
839 _perf_total_bailout_count =
840 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
841 PerfData::U_Events, CHECK);
842
843 _perf_total_invalidated_count =
844 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
845 PerfData::U_Events, CHECK);
846
847 _perf_total_compile_count =
848 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
849 PerfData::U_Events, CHECK);
850 _perf_total_osr_compile_count =
851 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
852 PerfData::U_Events, CHECK);
853
854 _perf_total_standard_compile_count =
855 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
856 PerfData::U_Events, CHECK);
857
858 _perf_sum_osr_bytes_compiled =
859 PerfDataManager::create_counter(SUN_CI, "osrBytes",
860 PerfData::U_Bytes, CHECK);
861
862 _perf_sum_standard_bytes_compiled =
863 PerfDataManager::create_counter(SUN_CI, "standardBytes",
864 PerfData::U_Bytes, CHECK);
865
866 _perf_sum_nmethod_size =
867 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
868 PerfData::U_Bytes, CHECK);
869
870 _perf_sum_nmethod_code_size =
871 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
872 PerfData::U_Bytes, CHECK);
873
874 _perf_last_method =
875 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
876 CompilerCounters::cmname_buffer_length,
877 "", CHECK);
878
879 _perf_last_failed_method =
880 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
881 CompilerCounters::cmname_buffer_length,
882 "", CHECK);
883
884 _perf_last_invalidated_method =
885 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
886 CompilerCounters::cmname_buffer_length,
887 "", CHECK);
888
889 _perf_last_compile_type =
890 PerfDataManager::create_variable(SUN_CI, "lastType",
891 PerfData::U_None,
892 (jlong)CompileBroker::no_compile,
893 CHECK);
894
895 _perf_last_compile_size =
896 PerfDataManager::create_variable(SUN_CI, "lastSize",
897 PerfData::U_Bytes,
898 (jlong)CompileBroker::no_compile,
899 CHECK);
900
901
902 _perf_last_failed_type =
903 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
904 PerfData::U_None,
905 (jlong)CompileBroker::no_compile,
906 CHECK);
907
908 _perf_last_invalidated_type =
909 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
910 PerfData::U_None,
911 (jlong)CompileBroker::no_compile,
912 CHECK);
913 }
914
915 _initialized = true;
916 }
917
918
919 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
920 AbstractCompiler* comp, TRAPS) {
921 CompilerThread* compiler_thread = NULL;
922
923 Klass* k =
924 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
925 true, CHECK_0);
926 instanceKlassHandle klass (THREAD, k);
927 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
928 Handle string = java_lang_String::create_from_str(name, CHECK_0);
929
930 // Initialize thread_oop to put it into the system threadGroup
931 Handle thread_group (THREAD, Universe::system_thread_group());
932 JavaValue result(T_VOID);
933 JavaCalls::call_special(&result, thread_oop,
934 klass,
935 vmSymbols::object_initializer_name(),
936 vmSymbols::threadgroup_string_void_signature(),
937 thread_group,
938 string,
939 CHECK_0);
940
941 {
942 MutexLocker mu(Threads_lock, THREAD);
943 compiler_thread = new CompilerThread(queue, counters);
944 // At this point the new CompilerThread data-races with this startup
945 // thread (which I believe is the primoridal thread and NOT the VM
946 // thread). This means Java bytecodes being executed at startup can
947 // queue compile jobs which will run at whatever default priority the
948 // newly created CompilerThread runs at.
949
950
951 // At this point it may be possible that no osthread was created for the
952 // JavaThread due to lack of memory. We would have to throw an exception
953 // in that case. However, since this must work and we do not allow
954 // exceptions anyway, check and abort if this fails.
955
956 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
957 vm_exit_during_initialization("java.lang.OutOfMemoryError",
958 "unable to create new native thread");
959 }
960
961 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
962
963 // Note that this only sets the JavaThread _priority field, which by
964 // definition is limited to Java priorities and not OS priorities.
965 // The os-priority is set in the CompilerThread startup code itself
966
967 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
968
969 // Note that we cannot call os::set_priority because it expects Java
970 // priorities and we are *explicitly* using OS priorities so that it's
971 // possible to set the compiler thread priority higher than any Java
972 // thread.
973
974 int native_prio = CompilerThreadPriority;
975 if (native_prio == -1) {
976 if (UseCriticalCompilerThreadPriority) {
977 native_prio = os::java_to_os_priority[CriticalPriority];
978 } else {
979 native_prio = os::java_to_os_priority[NearMaxPriority];
980 }
981 }
982 os::set_native_priority(compiler_thread, native_prio);
983
984 java_lang_Thread::set_daemon(thread_oop());
985
986 compiler_thread->set_threadObj(thread_oop());
987 compiler_thread->set_compiler(comp);
988 Threads::add(compiler_thread);
989 Thread::start(compiler_thread);
990 }
991
992 // Let go of Threads_lock before yielding
993 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
994
995 return compiler_thread;
996 }
997
998
999 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
1000 EXCEPTION_MARK;
1001 #if !defined(ZERO) && !defined(SHARK)
1002 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
1003 #endif // !ZERO && !SHARK
1004 // Initialize the compilation queue
1005 if (c2_compiler_count > 0) {
1006 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock);
1007 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
1008 }
1009 if (c1_compiler_count > 0) {
1010 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock);
1011 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
1012 }
1013
1014 int compiler_count = c1_compiler_count + c2_compiler_count;
1015
1016 _compiler_threads =
1017 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
1018
1019 char name_buffer[256];
1020 for (int i = 0; i < c2_compiler_count; i++) {
1021 // Create a name for our thread.
1022 sprintf(name_buffer, "C2 CompilerThread%d", i);
1023 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1024 // Shark and C2
1025 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, _compilers[1], CHECK);
1026 _compiler_threads->append(new_thread);
1027 }
1028
1029 for (int i = c2_compiler_count; i < compiler_count; i++) {
1030 // Create a name for our thread.
1031 sprintf(name_buffer, "C1 CompilerThread%d", i);
1032 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1033 // C1
1034 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, _compilers[0], CHECK);
1035 _compiler_threads->append(new_thread);
1036 }
1037
1038 if (UsePerfData) {
1039 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
1040 }
1041 }
1042
1043
1044 // Set the methods on the stack as on_stack so that redefine classes doesn't
1045 // reclaim them
1046 void CompileBroker::mark_on_stack() {
1047 if (_c2_method_queue != NULL) {
1048 _c2_method_queue->mark_on_stack();
1049 }
1050 if (_c1_method_queue != NULL) {
1051 _c1_method_queue->mark_on_stack();
1052 }
1053 }
1054
1055 // ------------------------------------------------------------------
1056 // CompileBroker::compile_method
1057 //
1058 // Request compilation of a method.
1059 void CompileBroker::compile_method_base(methodHandle method,
1060 int osr_bci,
1061 int comp_level,
1062 methodHandle hot_method,
1063 int hot_count,
1064 const char* comment,
1065 Thread* thread) {
1066 // do nothing if compiler thread(s) is not available
1067 if (!_initialized ) {
1068 return;
1069 }
1070
1071 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1072 assert(method->method_holder()->oop_is_instance(),
1073 "sanity check");
1074 assert(!method->method_holder()->is_not_initialized(),
1075 "method holder must be initialized");
1076 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1077
1078 if (CIPrintRequests) {
1079 tty->print("request: ");
1080 method->print_short_name(tty);
1081 if (osr_bci != InvocationEntryBci) {
1082 tty->print(" osr_bci: %d", osr_bci);
1083 }
1084 tty->print(" comment: %s count: %d", comment, hot_count);
1085 if (!hot_method.is_null()) {
1086 tty->print(" hot: ");
1087 if (hot_method() != method()) {
1088 hot_method->print_short_name(tty);
1089 } else {
1090 tty->print("yes");
1091 }
1092 }
1093 tty->cr();
1094 }
1095
1096 // A request has been made for compilation. Before we do any
1097 // real work, check to see if the method has been compiled
1098 // in the meantime with a definitive result.
1099 if (compilation_is_complete(method, osr_bci, comp_level)) {
1100 return;
1101 }
1102
1103 #ifndef PRODUCT
1104 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1105 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1106 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1107 return;
1108 }
1109 }
1110 #endif
1111
1112 // If this method is already in the compile queue, then
1113 // we do not block the current thread.
1114 if (compilation_is_in_queue(method, osr_bci)) {
1115 // We may want to decay our counter a bit here to prevent
1116 // multiple denied requests for compilation. This is an
1117 // open compilation policy issue. Note: The other possibility,
1118 // in the case that this is a blocking compile request, is to have
1119 // all subsequent blocking requesters wait for completion of
1120 // ongoing compiles. Note that in this case we'll need a protocol
1121 // for freeing the associated compile tasks. [Or we could have
1122 // a single static monitor on which all these waiters sleep.]
1123 return;
1124 }
1125
1126 // If the requesting thread is holding the pending list lock
1127 // then we just return. We can't risk blocking while holding
1128 // the pending list lock or a 3-way deadlock may occur
1129 // between the reference handler thread, a GC (instigated
1130 // by a compiler thread), and compiled method registration.
1131 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1132 return;
1133 }
1134
1135 // Outputs from the following MutexLocker block:
1136 CompileTask* task = NULL;
1137 bool blocking = false;
1138 CompileQueue* queue = compile_queue(comp_level);
1139
1140 // Acquire our lock.
1141 {
1142 MutexLocker locker(queue->lock(), thread);
1143
1144 // Make sure the method has not slipped into the queues since
1145 // last we checked; note that those checks were "fast bail-outs".
1146 // Here we need to be more careful, see 14012000 below.
1147 if (compilation_is_in_queue(method, osr_bci)) {
1148 return;
1149 }
1150
1151 // We need to check again to see if the compilation has
1152 // completed. A previous compilation may have registered
1153 // some result.
1154 if (compilation_is_complete(method, osr_bci, comp_level)) {
1155 return;
1156 }
1157
1158 // We now know that this compilation is not pending, complete,
1159 // or prohibited. Assign a compile_id to this compilation
1160 // and check to see if it is in our [Start..Stop) range.
1161 int compile_id = assign_compile_id(method, osr_bci);
1162 if (compile_id == 0) {
1163 // The compilation falls outside the allowed range.
1164 return;
1165 }
1166
1167 // Should this thread wait for completion of the compile?
1168 blocking = is_compile_blocking(method, osr_bci);
1169
1170 // We will enter the compilation in the queue.
1171 // 14012000: Note that this sets the queued_for_compile bits in
1172 // the target method. We can now reason that a method cannot be
1173 // queued for compilation more than once, as follows:
1174 // Before a thread queues a task for compilation, it first acquires
1175 // the compile queue lock, then checks if the method's queued bits
1176 // are set or it has already been compiled. Thus there can not be two
1177 // instances of a compilation task for the same method on the
1178 // compilation queue. Consider now the case where the compilation
1179 // thread has already removed a task for that method from the queue
1180 // and is in the midst of compiling it. In this case, the
1181 // queued_for_compile bits must be set in the method (and these
1182 // will be visible to the current thread, since the bits were set
1183 // under protection of the compile queue lock, which we hold now.
1184 // When the compilation completes, the compiler thread first sets
1185 // the compilation result and then clears the queued_for_compile
1186 // bits. Neither of these actions are protected by a barrier (or done
1187 // under the protection of a lock), so the only guarantee we have
1188 // (on machines with TSO (Total Store Order)) is that these values
1189 // will update in that order. As a result, the only combinations of
1190 // these bits that the current thread will see are, in temporal order:
1191 // <RESULT, QUEUE> :
1192 // <0, 1> : in compile queue, but not yet compiled
1193 // <1, 1> : compiled but queue bit not cleared
1194 // <1, 0> : compiled and queue bit cleared
1195 // Because we first check the queue bits then check the result bits,
1196 // we are assured that we cannot introduce a duplicate task.
1197 // Note that if we did the tests in the reverse order (i.e. check
1198 // result then check queued bit), we could get the result bit before
1199 // the compilation completed, and the queue bit after the compilation
1200 // completed, and end up introducing a "duplicate" (redundant) task.
1201 // In that case, the compiler thread should first check if a method
1202 // has already been compiled before trying to compile it.
1203 // NOTE: in the event that there are multiple compiler threads and
1204 // there is de-optimization/recompilation, things will get hairy,
1205 // and in that case it's best to protect both the testing (here) of
1206 // these bits, and their updating (here and elsewhere) under a
1207 // common lock.
1208 task = create_compile_task(queue,
1209 compile_id, method,
1210 osr_bci, comp_level,
1211 hot_method, hot_count, comment,
1212 blocking);
1213 }
1214
1215 if (blocking) {
1216 wait_for_completion(task);
1217 }
1218 }
1219
1220
1221 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1222 int comp_level,
1223 methodHandle hot_method, int hot_count,
1224 const char* comment, Thread* THREAD) {
1225 // make sure arguments make sense
1226 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1227 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1228 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1229 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1230 // allow any levels for WhiteBox
1231 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1232 // return quickly if possible
1233
1234 // lock, make sure that the compilation
1235 // isn't prohibited in a straightforward way.
1236 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1237 if (comp == NULL || !comp->can_compile_method(method) ||
1238 compilation_is_prohibited(method, osr_bci, comp_level)) {
1239 return NULL;
1240 }
1241
1242 if (osr_bci == InvocationEntryBci) {
1243 // standard compilation
1244 nmethod* method_code = method->code();
1245 if (method_code != NULL) {
1246 if (compilation_is_complete(method, osr_bci, comp_level)) {
1247 return method_code;
1248 }
1249 }
1250 if (method->is_not_compilable(comp_level)) {
1251 return NULL;
1252 }
1253 } else {
1254 // osr compilation
1255 #ifndef TIERED
1256 // seems like an assert of dubious value
1257 assert(comp_level == CompLevel_highest_tier,
1258 "all OSR compiles are assumed to be at a single compilation lavel");
1259 #endif // TIERED
1260 // We accept a higher level osr method
1261 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1262 if (nm != NULL) return nm;
1263 if (method->is_not_osr_compilable(comp_level)) return NULL;
1264 }
1265
1266 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1267 // some prerequisites that are compiler specific
1268 if (comp->is_c2() || comp->is_shark()) {
1269 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1270 // Resolve all classes seen in the signature of the method
1271 // we are compiling.
1272 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1273 }
1274
1275 // If the method is native, do the lookup in the thread requesting
1276 // the compilation. Native lookups can load code, which is not
1277 // permitted during compilation.
1278 //
1279 // Note: A native method implies non-osr compilation which is
1280 // checked with an assertion at the entry of this method.
1281 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1282 bool in_base_library;
1283 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1284 if (HAS_PENDING_EXCEPTION) {
1285 // In case of an exception looking up the method, we just forget
1286 // about it. The interpreter will kick-in and throw the exception.
1287 method->set_not_compilable(); // implies is_not_osr_compilable()
1288 CLEAR_PENDING_EXCEPTION;
1289 return NULL;
1290 }
1291 assert(method->has_native_function(), "must have native code by now");
1292 }
1293
1294 // RedefineClasses() has replaced this method; just return
1295 if (method->is_old()) {
1296 return NULL;
1297 }
1298
1299 // JVMTI -- post_compile_event requires jmethod_id() that may require
1300 // a lock the compiling thread can not acquire. Prefetch it here.
1301 if (JvmtiExport::should_post_compiled_method_load()) {
1302 method->jmethod_id();
1303 }
1304
1305 // do the compilation
1306 if (method->is_native()) {
1307 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1308 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1309 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1310 //
1311 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1312 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1313 AdapterHandlerLibrary::create_native_wrapper(method);
1314 } else {
1315 return NULL;
1316 }
1317 } else {
1318 // If the compiler is shut off due to code cache getting full
1319 // fail out now so blocking compiles dont hang the java thread
1320 if (!should_compile_new_jobs()) {
1321 CompilationPolicy::policy()->delay_compilation(method());
1322 return NULL;
1323 }
1324 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1325 }
1326
1327 // return requested nmethod
1328 // We accept a higher level osr method
1329 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1330 }
1331
1332
1333 // ------------------------------------------------------------------
1334 // CompileBroker::compilation_is_complete
1335 //
1336 // See if compilation of this method is already complete.
1337 bool CompileBroker::compilation_is_complete(methodHandle method,
1338 int osr_bci,
1339 int comp_level) {
1340 bool is_osr = (osr_bci != standard_entry_bci);
1341 if (is_osr) {
1342 if (method->is_not_osr_compilable(comp_level)) {
1343 return true;
1344 } else {
1345 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1346 return (result != NULL);
1347 }
1348 } else {
1349 if (method->is_not_compilable(comp_level)) {
1350 return true;
1351 } else {
1352 nmethod* result = method->code();
1353 if (result == NULL) return false;
1354 return comp_level == result->comp_level();
1355 }
1356 }
1357 }
1358
1359
1360 // ------------------------------------------------------------------
1361 // CompileBroker::compilation_is_in_queue
1362 //
1363 // See if this compilation is already requested.
1364 //
1365 // Implementation note: there is only a single "is in queue" bit
1366 // for each method. This means that the check below is overly
1367 // conservative in the sense that an osr compilation in the queue
1368 // will block a normal compilation from entering the queue (and vice
1369 // versa). This can be remedied by a full queue search to disambiguate
1370 // cases. If it is deemed profitible, this may be done.
1371 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1372 int osr_bci) {
1373 return method->queued_for_compilation();
1374 }
1375
1376 // ------------------------------------------------------------------
1377 // CompileBroker::compilation_is_prohibited
1378 //
1379 // See if this compilation is not allowed.
1380 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1381 bool is_native = method->is_native();
1382 // Some compilers may not support the compilation of natives.
1383 AbstractCompiler *comp = compiler(comp_level);
1384 if (is_native &&
1385 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1386 method->set_not_compilable_quietly(comp_level);
1387 return true;
1388 }
1389
1390 bool is_osr = (osr_bci != standard_entry_bci);
1391 // Some compilers may not support on stack replacement.
1392 if (is_osr &&
1393 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1394 method->set_not_osr_compilable(comp_level);
1395 return true;
1396 }
1397
1398 // The method may be explicitly excluded by the user.
1399 bool quietly;
1400 if (CompilerOracle::should_exclude(method, quietly)) {
1401 if (!quietly) {
1402 // This does not happen quietly...
1403 ResourceMark rm;
1404 tty->print("### Excluding %s:%s",
1405 method->is_native() ? "generation of native wrapper" : "compile",
1406 (method->is_static() ? " static" : ""));
1407 method->print_short_name(tty);
1408 tty->cr();
1409 }
1410 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1411 }
1412
1413 return false;
1414 }
1415
1416 /**
1417 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1418 * and the ID is within the specified range, the method is not compiled and 0 is returned.
1419 * The functions also allows to generate separate compilation IDs for OSR compilations.
1420 */
1421 int CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1422 #ifdef ASSERT
1423 bool is_osr = (osr_bci != standard_entry_bci);
1424 int id;
1425 if (CICountOSR && is_osr) {
1426 id = Atomic::add(1, &_osr_compilation_id);
1427 if (CIStartOSR <= id && id < CIStopOSR) {
1428 return id;
1429 }
1430 } else {
1431 id = Atomic::add(1, &_compilation_id);
1432 if (CIStart <= id && id < CIStop) {
1433 return id;
1434 }
1435 }
1436
1437 // The compilation falls outside the allowed range. Note that this can only happen in debug
1438 // build if the CIStart(OSR) and CIStop(OSR) flags are specified. Method handle intrinsics
1439 // (8026407) must currently be generated, so fail with an assert.
1440 assert(!method->is_method_handle_intrinsic(),
1441 "Must generate wrapper for method handle intrinsic but compilation is outside allowed range.");
1442
1443 // Method was not in the appropriate compilation range.
1444 method->set_not_compilable_quietly();
1445 return 0;
1446 #else
1447 return Atomic::add(1, &_compilation_id);
1448 #endif
1449 }
1450
1451
1452 // ------------------------------------------------------------------
1453 // CompileBroker::is_compile_blocking
1454 //
1455 // Should the current thread be blocked until this compilation request
1456 // has been fulfilled?
1457 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1458 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1459 return !BackgroundCompilation;
1460 }
1461
1462
1463 // ------------------------------------------------------------------
1464 // CompileBroker::preload_classes
1465 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1466 // Move this code over from c1_Compiler.cpp
1467 ShouldNotReachHere();
1468 }
1469
1470
1471 // ------------------------------------------------------------------
1472 // CompileBroker::create_compile_task
1473 //
1474 // Create a CompileTask object representing the current request for
1475 // compilation. Add this task to the queue.
1476 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1477 int compile_id,
1478 methodHandle method,
1479 int osr_bci,
1480 int comp_level,
1481 methodHandle hot_method,
1482 int hot_count,
1483 const char* comment,
1484 bool blocking) {
1485 CompileTask* new_task = allocate_task();
1486 new_task->initialize(compile_id, method, osr_bci, comp_level,
1487 hot_method, hot_count, comment,
1488 blocking);
1489 queue->add(new_task);
1490 return new_task;
1491 }
1492
1493
1494 // ------------------------------------------------------------------
1495 // CompileBroker::allocate_task
1496 //
1497 // Allocate a CompileTask, from the free list if possible.
1498 CompileTask* CompileBroker::allocate_task() {
1499 MutexLocker locker(CompileTaskAlloc_lock);
1500 CompileTask* task = NULL;
1501 if (_task_free_list != NULL) {
1502 task = _task_free_list;
1503 _task_free_list = task->next();
1504 task->set_next(NULL);
1505 } else {
1506 task = new CompileTask();
1507 task->set_next(NULL);
1508 }
1509 return task;
1510 }
1511
1512
1513 // ------------------------------------------------------------------
1514 // CompileBroker::free_task
1515 //
1516 // Add a task to the free list.
1517 void CompileBroker::free_task(CompileTask* task) {
1518 MutexLocker locker(CompileTaskAlloc_lock);
1519 task->free();
1520 task->set_next(_task_free_list);
1521 _task_free_list = task;
1522 }
1523
1524
1525 // ------------------------------------------------------------------
1526 // CompileBroker::wait_for_completion
1527 //
1528 // Wait for the given method CompileTask to complete.
1529 void CompileBroker::wait_for_completion(CompileTask* task) {
1530 if (CIPrintCompileQueue) {
1531 tty->print_cr("BLOCKING FOR COMPILE");
1532 }
1533
1534 assert(task->is_blocking(), "can only wait on blocking task");
1535
1536 JavaThread *thread = JavaThread::current();
1537 thread->set_blocked_on_compilation(true);
1538
1539 methodHandle method(thread, task->method());
1540 {
1541 MutexLocker waiter(task->lock(), thread);
1542
1543 while (!task->is_complete())
1544 task->lock()->wait();
1545 }
1546 // It is harmless to check this status without the lock, because
1547 // completion is a stable property (until the task object is recycled).
1548 assert(task->is_complete(), "Compilation should have completed");
1549 assert(task->code_handle() == NULL, "must be reset");
1550
1551 thread->set_blocked_on_compilation(false);
1552
1553 // By convention, the waiter is responsible for recycling a
1554 // blocking CompileTask. Since there is only one waiter ever
1555 // waiting on a CompileTask, we know that no one else will
1556 // be using this CompileTask; we can free it.
1557 free_task(task);
1558 }
1559
1560 // Initialize compiler thread(s) + compiler object(s). The postcondition
1561 // of this function is that the compiler runtimes are initialized and that
1562 //compiler threads can start compiling.
1563 bool CompileBroker::init_compiler_runtime() {
1564 CompilerThread* thread = CompilerThread::current();
1565 AbstractCompiler* comp = thread->compiler();
1566 // Final sanity check - the compiler object must exist
1567 guarantee(comp != NULL, "Compiler object must exist");
1568
1569 int system_dictionary_modification_counter;
1570 {
1571 MutexLocker locker(Compile_lock, thread);
1572 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1573 }
1574
1575 {
1576 // Must switch to native to allocate ci_env
1577 ThreadToNativeFromVM ttn(thread);
1578 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1579 // Cache Jvmti state
1580 ci_env.cache_jvmti_state();
1581 // Cache DTrace flags
1582 ci_env.cache_dtrace_flags();
1583
1584 // Switch back to VM state to do compiler initialization
1585 ThreadInVMfromNative tv(thread);
1586 ResetNoHandleMark rnhm;
1587
1588
1589 if (!comp->is_shark()) {
1590 // Perform per-thread and global initializations
1591 comp->initialize();
1592 }
1593 }
1594
1595 if (comp->is_failed()) {
1596 disable_compilation_forever();
1597 // If compiler initialization failed, no compiler thread that is specific to a
1598 // particular compiler runtime will ever start to compile methods.
1599
1600 shutdown_compiler_runtime(comp, thread);
1601 return false;
1602 }
1603
1604 // C1 specific check
1605 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1606 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1607 return false;
1608 }
1609
1610 return true;
1611 }
1612
1613 // If C1 and/or C2 initialization failed, we shut down all compilation.
1614 // We do this to keep things simple. This can be changed if it ever turns out to be
1615 // a problem.
1616 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1617 // Free buffer blob, if allocated
1618 if (thread->get_buffer_blob() != NULL) {
1619 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1620 CodeCache::free(thread->get_buffer_blob());
1621 }
1622
1623 if (comp->should_perform_shutdown()) {
1624 // There are two reasons for shutting down the compiler
1625 // 1) compiler runtime initialization failed
1626 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1627 warning("Shutting down compiler %s (no space to run compilers)", comp->name());
1628
1629 // Only one thread per compiler runtime object enters here
1630 // Set state to shut down
1631 comp->set_shut_down();
1632
1633 MutexLocker mu(MethodCompileQueue_lock, thread);
1634 CompileQueue* queue;
1635 if (_c1_method_queue != NULL) {
1636 _c1_method_queue->delete_all();
1637 queue = _c1_method_queue;
1638 _c1_method_queue = NULL;
1639 delete _c1_method_queue;
1640 }
1641
1642 if (_c2_method_queue != NULL) {
1643 _c2_method_queue->delete_all();
1644 queue = _c2_method_queue;
1645 _c2_method_queue = NULL;
1646 delete _c2_method_queue;
1647 }
1648
1649 // We could delete compiler runtimes also. However, there are references to
1650 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1651 // fail. This can be done later if necessary.
1652 }
1653 }
1654
1655 // ------------------------------------------------------------------
1656 // CompileBroker::compiler_thread_loop
1657 //
1658 // The main loop run by a CompilerThread.
1659 void CompileBroker::compiler_thread_loop() {
1660 CompilerThread* thread = CompilerThread::current();
1661 CompileQueue* queue = thread->queue();
1662 // For the thread that initializes the ciObjectFactory
1663 // this resource mark holds all the shared objects
1664 ResourceMark rm;
1665
1666 // First thread to get here will initialize the compiler interface
1667
1668 if (!ciObjectFactory::is_initialized()) {
1669 ASSERT_IN_VM;
1670 MutexLocker only_one (CompileThread_lock, thread);
1671 if (!ciObjectFactory::is_initialized()) {
1672 ciObjectFactory::initialize();
1673 }
1674 }
1675
1676 // Open a log.
1677 if (LogCompilation) {
1678 init_compiler_thread_log();
1679 }
1680 CompileLog* log = thread->log();
1681 if (log != NULL) {
1682 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1683 thread->name(),
1684 os::current_thread_id(),
1685 os::current_process_id());
1686 log->stamp();
1687 log->end_elem();
1688 }
1689
1690 // If compiler thread/runtime initialization fails, exit the compiler thread
1691 if (!init_compiler_runtime()) {
1692 return;
1693 }
1694
1695 // Poll for new compilation tasks as long as the JVM runs. Compilation
1696 // should only be disabled if something went wrong while initializing the
1697 // compiler runtimes. This, in turn, should not happen. The only known case
1698 // when compiler runtime initialization fails is if there is not enough free
1699 // space in the code cache to generate the necessary stubs, etc.
1700 while (!is_compilation_disabled_forever()) {
1701 // We need this HandleMark to avoid leaking VM handles.
1702 HandleMark hm(thread);
1703
1704 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1705 // the code cache is really full
1706 handle_full_code_cache();
1707 }
1708
1709 CompileTask* task = queue->get();
1710 if (task == NULL) {
1711 continue;
1712 }
1713
1714 // Give compiler threads an extra quanta. They tend to be bursty and
1715 // this helps the compiler to finish up the job.
1716 if( CompilerThreadHintNoPreempt )
1717 os::hint_no_preempt();
1718
1719 // trace per thread time and compile statistics
1720 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1721 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1722
1723 // Assign the task to the current thread. Mark this compilation
1724 // thread as active for the profiler.
1725 CompileTaskWrapper ctw(task);
1726 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1727 task->set_code_handle(&result_handle);
1728 methodHandle method(thread, task->method());
1729
1730 // Never compile a method if breakpoints are present in it
1731 if (method()->number_of_breakpoints() == 0) {
1732 // Compile the method.
1733 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1734 #ifdef COMPILER1
1735 // Allow repeating compilations for the purpose of benchmarking
1736 // compile speed. This is not useful for customers.
1737 if (CompilationRepeat != 0) {
1738 int compile_count = CompilationRepeat;
1739 while (compile_count > 0) {
1740 invoke_compiler_on_method(task);
1741 nmethod* nm = method->code();
1742 if (nm != NULL) {
1743 nm->make_zombie();
1744 method->clear_code();
1745 }
1746 compile_count--;
1747 }
1748 }
1749 #endif /* COMPILER1 */
1750 invoke_compiler_on_method(task);
1751 } else {
1752 // After compilation is disabled, remove remaining methods from queue
1753 method->clear_queued_for_compilation();
1754 }
1755 }
1756 }
1757
1758 // Shut down compiler runtime
1759 shutdown_compiler_runtime(thread->compiler(), thread);
1760 }
1761
1762 // ------------------------------------------------------------------
1763 // CompileBroker::init_compiler_thread_log
1764 //
1765 // Set up state required by +LogCompilation.
1766 void CompileBroker::init_compiler_thread_log() {
1767 CompilerThread* thread = CompilerThread::current();
1768 char file_name[4*K];
1769 FILE* fp = NULL;
1770 intx thread_id = os::current_thread_id();
1771 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1772 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1773 if (dir == NULL) {
1774 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1775 thread_id, os::current_process_id());
1776 } else {
1777 jio_snprintf(file_name, sizeof(file_name),
1778 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1779 os::file_separator(), thread_id, os::current_process_id());
1780 }
1781
1782 fp = fopen(file_name, "at");
1783 if (fp != NULL) {
1784 if (LogCompilation && Verbose) {
1785 tty->print_cr("Opening compilation log %s", file_name);
1786 }
1787 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1788 thread->init_log(log);
1789
1790 if (xtty != NULL) {
1791 ttyLocker ttyl;
1792 // Record any per thread log files
1793 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name);
1794 }
1795 return;
1796 }
1797 }
1798 warning("Cannot open log file: %s", file_name);
1799 }
1800
1801 // ------------------------------------------------------------------
1802 // CompileBroker::set_should_block
1803 //
1804 // Set _should_block.
1805 // Call this from the VM, with Threads_lock held and a safepoint requested.
1806 void CompileBroker::set_should_block() {
1807 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1808 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1809 #ifndef PRODUCT
1810 if (PrintCompilation && (Verbose || WizardMode))
1811 tty->print_cr("notifying compiler thread pool to block");
1812 #endif
1813 _should_block = true;
1814 }
1815
1816 // ------------------------------------------------------------------
1817 // CompileBroker::maybe_block
1818 //
1819 // Call this from the compiler at convenient points, to poll for _should_block.
1820 void CompileBroker::maybe_block() {
1821 if (_should_block) {
1822 #ifndef PRODUCT
1823 if (PrintCompilation && (Verbose || WizardMode))
1824 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1825 #endif
1826 ThreadInVMfromNative tivfn(JavaThread::current());
1827 }
1828 }
1829
1830 // wrapper for CodeCache::print_summary()
1831 static void codecache_print(bool detailed)
1832 {
1833 ResourceMark rm;
1834 stringStream s;
1835 // Dump code cache into a buffer before locking the tty,
1836 {
1837 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1838 CodeCache::print_summary(&s, detailed);
1839 }
1840 ttyLocker ttyl;
1841 tty->print(s.as_string());
1842 }
1843
1844 // ------------------------------------------------------------------
1845 // CompileBroker::invoke_compiler_on_method
1846 //
1847 // Compile a method.
1848 //
1849 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1850 if (PrintCompilation) {
1851 ResourceMark rm;
1852 task->print_line();
1853 }
1854 elapsedTimer time;
1855
1856 CompilerThread* thread = CompilerThread::current();
1857 ResourceMark rm(thread);
1858
1859 if (LogEvents) {
1860 _compilation_log->log_compile(thread, task);
1861 }
1862
1863 // Common flags.
1864 uint compile_id = task->compile_id();
1865 int osr_bci = task->osr_bci();
1866 bool is_osr = (osr_bci != standard_entry_bci);
1867 bool should_log = (thread->log() != NULL);
1868 bool should_break = false;
1869 int task_level = task->comp_level();
1870 {
1871 // create the handle inside it's own block so it can't
1872 // accidentally be referenced once the thread transitions to
1873 // native. The NoHandleMark before the transition should catch
1874 // any cases where this occurs in the future.
1875 methodHandle method(thread, task->method());
1876 should_break = check_break_at(method, compile_id, is_osr);
1877 if (should_log && !CompilerOracle::should_log(method)) {
1878 should_log = false;
1879 }
1880 assert(!method->is_native(), "no longer compile natives");
1881
1882 // Save information about this method in case of failure.
1883 set_last_compile(thread, method, is_osr, task_level);
1884
1885 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1886 }
1887
1888 // Allocate a new set of JNI handles.
1889 push_jni_handle_block();
1890 Method* target_handle = task->method();
1891 int compilable = ciEnv::MethodCompilable;
1892 {
1893 int system_dictionary_modification_counter;
1894 {
1895 MutexLocker locker(Compile_lock, thread);
1896 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1897 }
1898
1899 NoHandleMark nhm;
1900 ThreadToNativeFromVM ttn(thread);
1901
1902 ciEnv ci_env(task, system_dictionary_modification_counter);
1903 if (should_break) {
1904 ci_env.set_break_at_compile(true);
1905 }
1906 if (should_log) {
1907 ci_env.set_log(thread->log());
1908 }
1909 assert(thread->env() == &ci_env, "set by ci_env");
1910 // The thread-env() field is cleared in ~CompileTaskWrapper.
1911
1912 // Cache Jvmti state
1913 ci_env.cache_jvmti_state();
1914
1915 // Cache DTrace flags
1916 ci_env.cache_dtrace_flags();
1917
1918 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1919
1920 TraceTime t1("compilation", &time);
1921 EventCompilation event;
1922
1923 AbstractCompiler *comp = compiler(task_level);
1924 if (comp == NULL) {
1925 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1926 } else {
1927 comp->compile_method(&ci_env, target, osr_bci);
1928 }
1929
1930 if (!ci_env.failing() && task->code() == NULL) {
1931 //assert(false, "compiler should always document failure");
1932 // The compiler elected, without comment, not to register a result.
1933 // Do not attempt further compilations of this method.
1934 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1935 }
1936
1937 // Copy this bit to the enclosing block:
1938 compilable = ci_env.compilable();
1939
1940 if (ci_env.failing()) {
1941 const char* retry_message = ci_env.retry_message();
1942 if (_compilation_log != NULL) {
1943 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1944 }
1945 if (PrintCompilation) {
1946 FormatBufferResource msg = retry_message != NULL ?
1947 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1948 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1949 task->print_compilation(tty, msg);
1950 }
1951 } else {
1952 task->mark_success();
1953 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1954 if (_compilation_log != NULL) {
1955 nmethod* code = task->code();
1956 if (code != NULL) {
1957 _compilation_log->log_nmethod(thread, code);
1958 }
1959 }
1960 }
1961 // simulate crash during compilation
1962 assert(task->compile_id() != CICrashAt, "just as planned");
1963 if (event.should_commit()) {
1964 event.set_method(target->get_Method());
1965 event.set_compileID(compile_id);
1966 event.set_compileLevel(task->comp_level());
1967 event.set_succeded(task->is_success());
1968 event.set_isOsr(is_osr);
1969 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
1970 event.set_inlinedBytes(task->num_inlined_bytecodes());
1971 event.commit();
1972 }
1973 }
1974 pop_jni_handle_block();
1975
1976 methodHandle method(thread, task->method());
1977
1978 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
1979
1980 collect_statistics(thread, time, task);
1981
1982 if (PrintCompilation && PrintCompilation2) {
1983 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
1984 tty->print("%4d ", compile_id); // print compilation number
1985 tty->print("%s ", (is_osr ? "%" : " "));
1986 if (task->code() != NULL) {
1987 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
1988 }
1989 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
1990 }
1991
1992 if (PrintCodeCacheOnCompilation)
1993 codecache_print(/* detailed= */ false);
1994
1995 // Disable compilation, if required.
1996 switch (compilable) {
1997 case ciEnv::MethodCompilable_never:
1998 if (is_osr)
1999 method->set_not_osr_compilable_quietly();
2000 else
2001 method->set_not_compilable_quietly();
2002 break;
2003 case ciEnv::MethodCompilable_not_at_tier:
2004 if (is_osr)
2005 method->set_not_osr_compilable_quietly(task_level);
2006 else
2007 method->set_not_compilable_quietly(task_level);
2008 break;
2009 }
2010
2011 // Note that the queued_for_compilation bits are cleared without
2012 // protection of a mutex. [They were set by the requester thread,
2013 // when adding the task to the complie queue -- at which time the
2014 // compile queue lock was held. Subsequently, we acquired the compile
2015 // queue lock to get this task off the compile queue; thus (to belabour
2016 // the point somewhat) our clearing of the bits must be occurring
2017 // only after the setting of the bits. See also 14012000 above.
2018 method->clear_queued_for_compilation();
2019
2020 #ifdef ASSERT
2021 if (CollectedHeap::fired_fake_oom()) {
2022 // The current compile received a fake OOM during compilation so
2023 // go ahead and exit the VM since the test apparently succeeded
2024 tty->print_cr("*** Shutting down VM after successful fake OOM");
2025 vm_exit(0);
2026 }
2027 #endif
2028 }
2029
2030 /**
2031 * The CodeCache is full. Print out warning and disable compilation
2032 * or try code cache cleaning so compilation can continue later.
2033 */
2034 void CompileBroker::handle_full_code_cache() {
2035 UseInterpreter = true;
2036 if (UseCompiler || AlwaysCompileLoopMethods ) {
2037 if (xtty != NULL) {
2038 ResourceMark rm;
2039 stringStream s;
2040 // Dump code cache state into a buffer before locking the tty,
2041 // because log_state() will use locks causing lock conflicts.
2042 CodeCache::log_state(&s);
2043 // Lock to prevent tearing
2044 ttyLocker ttyl;
2045 xtty->begin_elem("code_cache_full");
2046 xtty->print(s.as_string());
2047 xtty->stamp();
2048 xtty->end_elem();
2049 }
2050
2051 CodeCache::report_codemem_full();
2052
2053 #ifndef PRODUCT
2054 if (CompileTheWorld || ExitOnFullCodeCache) {
2055 codecache_print(/* detailed= */ true);
2056 before_exit(JavaThread::current());
2057 exit_globals(); // will delete tty
2058 vm_direct_exit(CompileTheWorld ? 0 : 1);
2059 }
2060 #endif
2061 if (UseCodeCacheFlushing) {
2062 // Since code cache is full, immediately stop new compiles
2063 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2064 NMethodSweeper::log_sweep("disable_compiler");
2065 }
2066 // Switch to 'vm_state'. This ensures that possibly_sweep() can be called
2067 // without having to consider the state in which the current thread is.
2068 ThreadInVMfromUnknown in_vm;
2069 NMethodSweeper::possibly_sweep();
2070 } else {
2071 disable_compilation_forever();
2072 }
2073
2074 // Print warning only once
2075 if (should_print_compiler_warning()) {
2076 warning("CodeCache is full. Compiler has been disabled.");
2077 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
2078 codecache_print(/* detailed= */ true);
2079 }
2080 }
2081 }
2082
2083 // ------------------------------------------------------------------
2084 // CompileBroker::set_last_compile
2085 //
2086 // Record this compilation for debugging purposes.
2087 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
2088 ResourceMark rm;
2089 char* method_name = method->name()->as_C_string();
2090 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2091 char current_method[CompilerCounters::cmname_buffer_length];
2092 size_t maxLen = CompilerCounters::cmname_buffer_length;
2093
2094 if (UsePerfData) {
2095 const char* class_name = method->method_holder()->name()->as_C_string();
2096
2097 size_t s1len = strlen(class_name);
2098 size_t s2len = strlen(method_name);
2099
2100 // check if we need to truncate the string
2101 if (s1len + s2len + 2 > maxLen) {
2102
2103 // the strategy is to lop off the leading characters of the
2104 // class name and the trailing characters of the method name.
2105
2106 if (s2len + 2 > maxLen) {
2107 // lop of the entire class name string, let snprintf handle
2108 // truncation of the method name.
2109 class_name += s1len; // null string
2110 }
2111 else {
2112 // lop off the extra characters from the front of the class name
2113 class_name += ((s1len + s2len + 2) - maxLen);
2114 }
2115 }
2116
2117 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2118 }
2119
2120 if (CICountOSR && is_osr) {
2121 _last_compile_type = osr_compile;
2122 } else {
2123 _last_compile_type = normal_compile;
2124 }
2125 _last_compile_level = comp_level;
2126
2127 if (UsePerfData) {
2128 CompilerCounters* counters = thread->counters();
2129 counters->set_current_method(current_method);
2130 counters->set_compile_type((jlong)_last_compile_type);
2131 }
2132 }
2133
2134
2135 // ------------------------------------------------------------------
2136 // CompileBroker::push_jni_handle_block
2137 //
2138 // Push on a new block of JNI handles.
2139 void CompileBroker::push_jni_handle_block() {
2140 JavaThread* thread = JavaThread::current();
2141
2142 // Allocate a new block for JNI handles.
2143 // Inlined code from jni_PushLocalFrame()
2144 JNIHandleBlock* java_handles = thread->active_handles();
2145 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2146 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2147 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2148 thread->set_active_handles(compile_handles);
2149 }
2150
2151
2152 // ------------------------------------------------------------------
2153 // CompileBroker::pop_jni_handle_block
2154 //
2155 // Pop off the current block of JNI handles.
2156 void CompileBroker::pop_jni_handle_block() {
2157 JavaThread* thread = JavaThread::current();
2158
2159 // Release our JNI handle block
2160 JNIHandleBlock* compile_handles = thread->active_handles();
2161 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2162 thread->set_active_handles(java_handles);
2163 compile_handles->set_pop_frame_link(NULL);
2164 JNIHandleBlock::release_block(compile_handles, thread); // may block
2165 }
2166
2167
2168 // ------------------------------------------------------------------
2169 // CompileBroker::check_break_at
2170 //
2171 // Should the compilation break at the current compilation.
2172 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2173 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2174 return true;
2175 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2176 return true;
2177 } else {
2178 return (compile_id == CIBreakAt);
2179 }
2180 }
2181
2182 // ------------------------------------------------------------------
2183 // CompileBroker::collect_statistics
2184 //
2185 // Collect statistics about the compilation.
2186
2187 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2188 bool success = task->is_success();
2189 methodHandle method (thread, task->method());
2190 uint compile_id = task->compile_id();
2191 bool is_osr = (task->osr_bci() != standard_entry_bci);
2192 nmethod* code = task->code();
2193 CompilerCounters* counters = thread->counters();
2194
2195 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2196 MutexLocker locker(CompileStatistics_lock);
2197
2198 // _perf variables are production performance counters which are
2199 // updated regardless of the setting of the CITime and CITimeEach flags
2200 //
2201 if (!success) {
2202 _total_bailout_count++;
2203 if (UsePerfData) {
2204 _perf_last_failed_method->set_value(counters->current_method());
2205 _perf_last_failed_type->set_value(counters->compile_type());
2206 _perf_total_bailout_count->inc();
2207 }
2208 } else if (code == NULL) {
2209 if (UsePerfData) {
2210 _perf_last_invalidated_method->set_value(counters->current_method());
2211 _perf_last_invalidated_type->set_value(counters->compile_type());
2212 _perf_total_invalidated_count->inc();
2213 }
2214 _total_invalidated_count++;
2215 } else {
2216 // Compilation succeeded
2217
2218 // update compilation ticks - used by the implementation of
2219 // java.lang.management.CompilationMBean
2220 _perf_total_compilation->inc(time.ticks());
2221
2222 _t_total_compilation.add(time);
2223 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2224
2225 if (CITime) {
2226 if (is_osr) {
2227 _t_osr_compilation.add(time);
2228 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2229 } else {
2230 _t_standard_compilation.add(time);
2231 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2232 }
2233 }
2234
2235 if (UsePerfData) {
2236 // save the name of the last method compiled
2237 _perf_last_method->set_value(counters->current_method());
2238 _perf_last_compile_type->set_value(counters->compile_type());
2239 _perf_last_compile_size->set_value(method->code_size() +
2240 task->num_inlined_bytecodes());
2241 if (is_osr) {
2242 _perf_osr_compilation->inc(time.ticks());
2243 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2244 } else {
2245 _perf_standard_compilation->inc(time.ticks());
2246 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2247 }
2248 }
2249
2250 if (CITimeEach) {
2251 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2252 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2253 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2254 }
2255
2256 // Collect counts of successful compilations
2257 _sum_nmethod_size += code->total_size();
2258 _sum_nmethod_code_size += code->insts_size();
2259 _total_compile_count++;
2260
2261 if (UsePerfData) {
2262 _perf_sum_nmethod_size->inc( code->total_size());
2263 _perf_sum_nmethod_code_size->inc(code->insts_size());
2264 _perf_total_compile_count->inc();
2265 }
2266
2267 if (is_osr) {
2268 if (UsePerfData) _perf_total_osr_compile_count->inc();
2269 _total_osr_compile_count++;
2270 } else {
2271 if (UsePerfData) _perf_total_standard_compile_count->inc();
2272 _total_standard_compile_count++;
2273 }
2274 }
2275 // set the current method for the thread to null
2276 if (UsePerfData) counters->set_current_method("");
2277 }
2278
2279 const char* CompileBroker::compiler_name(int comp_level) {
2280 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2281 if (comp == NULL) {
2282 return "no compiler";
2283 } else {
2284 return (comp->name());
2285 }
2286 }
2287
2288 void CompileBroker::print_times() {
2289 tty->cr();
2290 tty->print_cr("Accumulated compiler times (for compiled methods only)");
2291 tty->print_cr("------------------------------------------------");
2292 //0000000000111111111122222222223333333333444444444455555555556666666666
2293 //0123456789012345678901234567890123456789012345678901234567890123456789
2294 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
2295 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
2296 CompileBroker::_t_standard_compilation.seconds(),
2297 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2298 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);
2299
2300 AbstractCompiler *comp = compiler(CompLevel_simple);
2301 if (comp != NULL) {
2302 comp->print_timers();
2303 }
2304 comp = compiler(CompLevel_full_optimization);
2305 if (comp != NULL) {
2306 comp->print_timers();
2307 }
2308 tty->cr();
2309 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count);
2310 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count);
2311 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count);
2312 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2313 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
2314 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
2315 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
2316 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2317 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
2318 tty->cr();
2319 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
2320 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
2321 }
2322
2323 // Debugging output for failure
2324 void CompileBroker::print_last_compile() {
2325 if ( _last_compile_level != CompLevel_none &&
2326 compiler(_last_compile_level) != NULL &&
2327 _last_method_compiled != NULL &&
2328 _last_compile_type != no_compile) {
2329 if (_last_compile_type == osr_compile) {
2330 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2331 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2332 } else {
2333 tty->print_cr("Last parse: %d+++(%d) %s",
2334 _compilation_id, _last_compile_level, _last_method_compiled);
2335 }
2336 }
2337 }
2338
2339
2340 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2341 #ifndef PRODUCT
2342 st->print_cr("Compiler thread printing unimplemented.");
2343 st->cr();
2344 #endif
2345 }