1 /*
2 * Copyright (c) 1999, 2014, 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/atomic.inline.hpp"
40 #include "runtime/compilationPolicy.hpp"
41 #include "runtime/init.hpp"
42 #include "runtime/interfaceSupport.hpp"
43 #include "runtime/javaCalls.hpp"
44 #include "runtime/os.hpp"
45 #include "runtime/sharedRuntime.hpp"
46 #include "runtime/sweeper.hpp"
47 #include "trace/tracing.hpp"
48 #include "utilities/dtrace.hpp"
49 #include "utilities/events.hpp"
50 #ifdef COMPILER1
51 #include "c1/c1_Compiler.hpp"
52 #endif
53 #ifdef COMPILER2
54 #include "opto/c2compiler.hpp"
55 #endif
56 #ifdef SHARK
57 #include "shark/sharkCompiler.hpp"
58 #endif
59
60 #ifdef DTRACE_ENABLED
61
62 // Only bother with this argument setup if dtrace is available
63
64 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \
65 { \
66 Symbol* klass_name = (method)->klass_name(); \
67 Symbol* name = (method)->name(); \
68 Symbol* signature = (method)->signature(); \
69 HOTSPOT_METHOD_COMPILE_BEGIN( \
70 (char *) comp_name, strlen(comp_name), \
71 (char *) klass_name->bytes(), klass_name->utf8_length(), \
72 (char *) name->bytes(), name->utf8_length(), \
73 (char *) signature->bytes(), signature->utf8_length()); \
74 }
75
76 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \
77 { \
78 Symbol* klass_name = (method)->klass_name(); \
79 Symbol* name = (method)->name(); \
80 Symbol* signature = (method)->signature(); \
81 HOTSPOT_METHOD_COMPILE_END( \
82 (char *) comp_name, strlen(comp_name), \
83 (char *) klass_name->bytes(), klass_name->utf8_length(), \
84 (char *) name->bytes(), name->utf8_length(), \
85 (char *) signature->bytes(), signature->utf8_length(), (success)); \
86 }
87
88 #else // ndef DTRACE_ENABLED
89
90 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name)
91 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success)
92
93 #endif // ndef DTRACE_ENABLED
94
95 bool CompileBroker::_initialized = false;
96 volatile bool CompileBroker::_should_block = false;
97 volatile jint CompileBroker::_print_compilation_warning = 0;
98 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
99
100 // The installed compiler(s)
101 AbstractCompiler* CompileBroker::_compilers[2];
102
103 // These counters are used to assign an unique ID to each compilation.
104 volatile jint CompileBroker::_compilation_id = 0;
105 volatile jint CompileBroker::_osr_compilation_id = 0;
106
107 // Debugging information
108 int CompileBroker::_last_compile_type = no_compile;
109 int CompileBroker::_last_compile_level = CompLevel_none;
110 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
111
112 // Performance counters
113 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
114 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
115 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
116
117 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
118 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
119 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
120 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
121 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
122
123 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
124 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
125 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
126 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
127
128 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
129 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
130 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
131 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
132 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
133 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
134 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
135
136 // Timers and counters for generating statistics
137 elapsedTimer CompileBroker::_t_total_compilation;
138 elapsedTimer CompileBroker::_t_osr_compilation;
139 elapsedTimer CompileBroker::_t_standard_compilation;
140 elapsedTimer CompileBroker::_t_invalidated_compilation;
141 elapsedTimer CompileBroker::_t_bailedout_compilation;
142
143 int CompileBroker::_total_bailout_count = 0;
144 int CompileBroker::_total_invalidated_count = 0;
145 int CompileBroker::_total_compile_count = 0;
146 int CompileBroker::_total_osr_compile_count = 0;
147 int CompileBroker::_total_standard_compile_count = 0;
148
149 int CompileBroker::_sum_osr_bytes_compiled = 0;
150 int CompileBroker::_sum_standard_bytes_compiled = 0;
151 int CompileBroker::_sum_nmethod_size = 0;
152 int CompileBroker::_sum_nmethod_code_size = 0;
153
154 long CompileBroker::_peak_compilation_time = 0;
155
156 CompileQueue* CompileBroker::_c2_compile_queue = NULL;
157 CompileQueue* CompileBroker::_c1_compile_queue = NULL;
158
159 GrowableArray<CompilerThread*>* CompileBroker::_compiler_threads = NULL;
160
161
162 class CompilationLog : public StringEventLog {
163 public:
164 CompilationLog() : StringEventLog("Compilation events") {
165 }
166
167 void log_compile(JavaThread* thread, CompileTask* task) {
168 StringLogMessage lm;
169 stringStream sstr = lm.stream();
170 // msg.time_stamp().update_to(tty->time_stamp().ticks());
171 task->print_compilation(&sstr, NULL, true, false);
172 log(thread, "%s", (const char*)lm);
173 }
174
175 void log_nmethod(JavaThread* thread, nmethod* nm) {
176 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]",
177 nm->compile_id(), nm->is_osr_method() ? "%" : "",
178 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end()));
179 }
180
181 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) {
182 StringLogMessage lm;
183 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason);
184 if (retry_message != NULL) {
185 lm.append(" (%s)", retry_message);
186 }
187 lm.print("\n");
188 log(thread, "%s", (const char*)lm);
189 }
190 };
191
192 static CompilationLog* _compilation_log = NULL;
193
194 void compileBroker_init() {
195 if (LogEvents) {
196 _compilation_log = new CompilationLog();
197 }
198 }
199
200 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
201 CompilerThread* thread = CompilerThread::current();
202 thread->set_task(task);
203 CompileLog* log = thread->log();
204 if (log != NULL) task->log_task_start(log);
205 }
206
207 CompileTaskWrapper::~CompileTaskWrapper() {
208 CompilerThread* thread = CompilerThread::current();
209 CompileTask* task = thread->task();
210 CompileLog* log = thread->log();
211 if (log != NULL) task->log_task_done(log);
212 thread->set_task(NULL);
213 task->set_code_handle(NULL);
214 thread->set_env(NULL);
215 if (task->is_blocking()) {
216 MutexLocker notifier(task->lock(), thread);
217 task->mark_complete();
218 // Notify the waiting thread that the compilation has completed.
219 task->lock()->notify_all();
220 } else {
221 task->mark_complete();
222
223 // By convention, the compiling thread is responsible for
224 // recycling a non-blocking CompileTask.
225 CompileTask::free(task);
226 }
227 }
228
229
230 CompileTask* CompileTask::_task_free_list = NULL;
231 #ifdef ASSERT
232 int CompileTask::_num_allocated_tasks = 0;
233 #endif
234 /**
235 * Allocate a CompileTask, from the free list if possible.
236 */
237 CompileTask* CompileTask::allocate() {
238 MutexLocker locker(CompileTaskAlloc_lock);
239 CompileTask* task = NULL;
240
241 if (_task_free_list != NULL) {
242 task = _task_free_list;
243 _task_free_list = task->next();
244 task->set_next(NULL);
245 } else {
246 task = new CompileTask();
247 DEBUG_ONLY(_num_allocated_tasks++;)
248 assert (_num_allocated_tasks < 10000, "Leaking compilation tasks?");
249 task->set_next(NULL);
250 task->set_is_free(true);
251 }
252 assert(task->is_free(), "Task must be free.");
253 task->set_is_free(false);
254 return task;
255 }
256
257
258 /**
259 * Add a task to the free list.
260 */
261 void CompileTask::free(CompileTask* task) {
262 MutexLocker locker(CompileTaskAlloc_lock);
263 if (!task->is_free()) {
264 task->set_code(NULL);
265 assert(!task->lock()->is_locked(), "Should not be locked when freed");
266 JNIHandles::destroy_global(task->_method_holder);
267 JNIHandles::destroy_global(task->_hot_method_holder);
268
269 task->set_is_free(true);
270 task->set_next(_task_free_list);
271 _task_free_list = task;
272 }
273 }
274
275 void CompileTask::initialize(int compile_id,
276 methodHandle method,
277 int osr_bci,
278 int comp_level,
279 methodHandle hot_method,
280 int hot_count,
281 const char* comment,
282 bool is_blocking) {
283 assert(!_lock->is_locked(), "bad locking");
284
285 _compile_id = compile_id;
286 _method = method();
287 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder());
288 _osr_bci = osr_bci;
289 _is_blocking = is_blocking;
290 _comp_level = comp_level;
291 _num_inlined_bytecodes = 0;
292
293 _is_complete = false;
294 _is_success = false;
295 _code_handle = NULL;
296
297 _hot_method = NULL;
298 _hot_method_holder = NULL;
299 _hot_count = hot_count;
300 _time_queued = 0; // tidy
301 _comment = comment;
302 _failure_reason = NULL;
303
304 if (LogCompilation) {
305 _time_queued = os::elapsed_counter();
306 if (hot_method.not_null()) {
307 if (hot_method == method) {
308 _hot_method = _method;
309 } else {
310 _hot_method = hot_method();
311 // only add loader or mirror if different from _method_holder
312 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder());
313 }
314 }
315 }
316
317 _next = NULL;
318 }
319
320 // ------------------------------------------------------------------
321 // CompileTask::code/set_code
322 nmethod* CompileTask::code() const {
323 if (_code_handle == NULL) return NULL;
324 return _code_handle->code();
325 }
326 void CompileTask::set_code(nmethod* nm) {
327 if (_code_handle == NULL && nm == NULL) return;
328 guarantee(_code_handle != NULL, "");
329 _code_handle->set_code(nm);
330 if (nm == NULL) _code_handle = NULL; // drop the handle also
331 }
332
333 void CompileTask::mark_on_stack() {
334 // Mark these methods as something redefine classes cannot remove.
335 _method->set_on_stack(true);
336 if (_hot_method != NULL) {
337 _hot_method->set_on_stack(true);
338 }
339 }
340
341 // ------------------------------------------------------------------
342 // CompileTask::print_line_on_error
343 //
344 // This function is called by fatal error handler when the thread
345 // causing troubles is a compiler thread.
346 //
347 // Do not grab any lock, do not allocate memory.
348 //
349 // Otherwise it's the same as CompileTask::print_line()
350 //
351 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
352 // print compiler name
353 st->print("%s:", CompileBroker::compiler_name(comp_level()));
354 print_compilation(st);
355 }
356
357 // ------------------------------------------------------------------
358 // CompileTask::print_line
359 void CompileTask::print_tty() {
360 ttyLocker ttyl; // keep the following output all in one block
361 // print compiler name if requested
362 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level()));
363 print_compilation(tty);
364 }
365
366 // ------------------------------------------------------------------
367 // CompileTask::print_compilation_impl
368 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
369 bool is_osr_method, int osr_bci, bool is_blocking,
370 const char* msg, bool short_form, bool cr) {
371 if (!short_form) {
372 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp
373 }
374 st->print("%4d ", compile_id); // print compilation number
375
376 // For unloaded methods the transition to zombie occurs after the
377 // method is cleared so it's impossible to report accurate
378 // information for that case.
379 bool is_synchronized = false;
380 bool has_exception_handler = false;
381 bool is_native = false;
382 if (method != NULL) {
383 is_synchronized = method->is_synchronized();
384 has_exception_handler = method->has_exception_handler();
385 is_native = method->is_native();
386 }
387 // method attributes
388 const char compile_type = is_osr_method ? '%' : ' ';
389 const char sync_char = is_synchronized ? 's' : ' ';
390 const char exception_char = has_exception_handler ? '!' : ' ';
391 const char blocking_char = is_blocking ? 'b' : ' ';
392 const char native_char = is_native ? 'n' : ' ';
393
394 // print method attributes
395 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char);
396
397 if (TieredCompilation) {
398 if (comp_level != -1) st->print("%d ", comp_level);
399 else st->print("- ");
400 }
401 st->print(" "); // more indent
402
403 if (method == NULL) {
404 st->print("(method)");
405 } else {
406 method->print_short_name(st);
407 if (is_osr_method) {
408 st->print(" @ %d", osr_bci);
409 }
410 if (method->is_native())
411 st->print(" (native)");
412 else
413 st->print(" (%d bytes)", method->code_size());
414 }
415
416 if (msg != NULL) {
417 st->print(" %s", msg);
418 }
419 if (cr) {
420 st->cr();
421 }
422 }
423
424 // ------------------------------------------------------------------
425 // CompileTask::print_inlining
426 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) {
427 // 1234567
428 st->print(" "); // print timestamp
429 // 1234
430 st->print(" "); // print compilation number
431
432 // method attributes
433 if (method->is_loaded()) {
434 const char sync_char = method->is_synchronized() ? 's' : ' ';
435 const char exception_char = method->has_exception_handlers() ? '!' : ' ';
436 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' ';
437
438 // print method attributes
439 st->print(" %c%c%c ", sync_char, exception_char, monitors_char);
440 } else {
441 // %s!bn
442 st->print(" "); // print method attributes
443 }
444
445 if (TieredCompilation) {
446 st->print(" ");
447 }
448 st->print(" "); // more indent
449 st->print(" "); // initial inlining indent
450
451 for (int i = 0; i < inline_level; i++) st->print(" ");
452
453 st->print("@ %d ", bci); // print bci
454 method->print_short_name(st);
455 if (method->is_loaded())
456 st->print(" (%d bytes)", method->code_size());
457 else
458 st->print(" (not loaded)");
459
460 if (msg != NULL) {
461 st->print(" %s", msg);
462 }
463 st->cr();
464 }
465
466 // ------------------------------------------------------------------
467 // CompileTask::print_inline_indent
468 void CompileTask::print_inline_indent(int inline_level, outputStream* st) {
469 // 1234567
470 st->print(" "); // print timestamp
471 // 1234
472 st->print(" "); // print compilation number
473 // %s!bn
474 st->print(" "); // print method attributes
475 if (TieredCompilation) {
476 st->print(" ");
477 }
478 st->print(" "); // more indent
479 st->print(" "); // initial inlining indent
480 for (int i = 0; i < inline_level; i++) st->print(" ");
481 }
482
483 // ------------------------------------------------------------------
484 // CompileTask::print_compilation
485 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form, bool cr) {
486 bool is_osr_method = osr_bci() != InvocationEntryBci;
487 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form, cr);
488 }
489
490 // ------------------------------------------------------------------
491 // CompileTask::log_task
492 void CompileTask::log_task(xmlStream* log) {
493 Thread* thread = Thread::current();
494 methodHandle method(thread, this->method());
495 ResourceMark rm(thread);
496
497 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
498 log->print(" compile_id='%d'", _compile_id);
499 if (_osr_bci != CompileBroker::standard_entry_bci) {
500 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
501 } // else compile_kind='c2c'
502 if (!method.is_null()) log->method(method);
503 if (_osr_bci != CompileBroker::standard_entry_bci) {
504 log->print(" osr_bci='%d'", _osr_bci);
505 }
506 if (_comp_level != CompLevel_highest_tier) {
507 log->print(" level='%d'", _comp_level);
508 }
509 if (_is_blocking) {
510 log->print(" blocking='1'");
511 }
512 log->stamp();
513 }
514
515
516 // ------------------------------------------------------------------
517 // CompileTask::log_task_queued
518 void CompileTask::log_task_queued() {
519 Thread* thread = Thread::current();
520 ttyLocker ttyl;
521 ResourceMark rm(thread);
522
523 xtty->begin_elem("task_queued");
524 log_task(xtty);
525 if (_comment != NULL) {
526 xtty->print(" comment='%s'", _comment);
527 }
528 if (_hot_method != NULL) {
529 methodHandle hot(thread, _hot_method);
530 methodHandle method(thread, _method);
531 if (hot() != method()) {
532 xtty->method(hot);
533 }
534 }
535 if (_hot_count != 0) {
536 xtty->print(" hot_count='%d'", _hot_count);
537 }
538 xtty->end_elem();
539 }
540
541
542 // ------------------------------------------------------------------
543 // CompileTask::log_task_start
544 void CompileTask::log_task_start(CompileLog* log) {
545 log->begin_head("task");
546 log_task(log);
547 log->end_head();
548 }
549
550
551 // ------------------------------------------------------------------
552 // CompileTask::log_task_done
553 void CompileTask::log_task_done(CompileLog* log) {
554 Thread* thread = Thread::current();
555 methodHandle method(thread, this->method());
556 ResourceMark rm(thread);
557
558 if (!_is_success) {
559 const char* reason = _failure_reason != NULL ? _failure_reason : "unknown";
560 log->elem("failure reason='%s'", reason);
561 }
562
563 // <task_done ... stamp='1.234'> </task>
564 nmethod* nm = code();
565 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
566 _is_success, nm == NULL ? 0 : nm->content_size(),
567 method->invocation_count());
568 int bec = method->backedge_count();
569 if (bec != 0) log->print(" backedge_count='%d'", bec);
570 // Note: "_is_complete" is about to be set, but is not.
571 if (_num_inlined_bytecodes != 0) {
572 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
573 }
574 log->stamp();
575 log->end_elem();
576 log->tail("task");
577 log->clear_identities(); // next task will have different CI
578 if (log->unflushed_count() > 2000) {
579 log->flush();
580 }
581 log->mark_file_end();
582 }
583
584
585
586 /**
587 * Add a CompileTask to a CompileQueue.
588 */
589 void CompileQueue::add(CompileTask* task) {
590 assert(lock()->owned_by_self(), "must own lock");
591
592 task->set_next(NULL);
593 task->set_prev(NULL);
594
595 if (_last == NULL) {
596 // The compile queue is empty.
597 assert(_first == NULL, "queue is empty");
598 _first = task;
599 _last = task;
600 } else {
601 // Append the task to the queue.
602 assert(_last->next() == NULL, "not last");
603 _last->set_next(task);
604 task->set_prev(_last);
605 _last = task;
606 }
607 ++_size;
608
609 // Mark the method as being in the compile queue.
610 task->method()->set_queued_for_compilation();
611
612 if (CIPrintCompileQueue) {
613 print_tty();
614 }
615
616 if (LogCompilation && xtty != NULL) {
617 task->log_task_queued();
618 }
619
620 // Notify CompilerThreads that a task is available.
621 lock()->notify_all();
622 }
623
624 /**
625 * Empties compilation queue by putting all compilation tasks onto
626 * a freelist. Furthermore, the method wakes up all threads that are
627 * waiting on a compilation task to finish. This can happen if background
628 * compilation is disabled.
629 */
630 void CompileQueue::free_all() {
631 MutexLocker mu(lock());
632 CompileTask* next = _first;
633
634 // Iterate over all tasks in the compile queue
635 while (next != NULL) {
636 CompileTask* current = next;
637 next = current->next();
638 {
639 // Wake up thread that blocks on the compile task.
640 MutexLocker ct_lock(current->lock());
641 current->lock()->notify();
642 }
643 // Put the task back on the freelist.
644 CompileTask::free(current);
645 }
646 _first = NULL;
647
648 // Wake up all threads that block on the queue.
649 lock()->notify_all();
650 }
651
652 // ------------------------------------------------------------------
653 // CompileQueue::get
654 //
655 // Get the next CompileTask from a CompileQueue
656 CompileTask* CompileQueue::get() {
657 NMethodSweeper::possibly_sweep();
658
659 MutexLocker locker(lock());
660 // If _first is NULL we have no more compile jobs. There are two reasons for
661 // having no compile jobs: First, we compiled everything we wanted. Second,
662 // we ran out of code cache so compilation has been disabled. In the latter
663 // case we perform code cache sweeps to free memory such that we can re-enable
664 // compilation.
665 while (_first == NULL) {
666 // Exit loop if compilation is disabled forever
667 if (CompileBroker::is_compilation_disabled_forever()) {
668 return NULL;
669 }
670
671 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) {
672 // Wait a certain amount of time to possibly do another sweep.
673 // We must wait until stack scanning has happened so that we can
674 // transition a method's state from 'not_entrant' to 'zombie'.
675 long wait_time = NmethodSweepCheckInterval * 1000;
676 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) {
677 // Only one thread at a time can do sweeping. Scale the
678 // wait time according to the number of compiler threads.
679 // As a result, the next sweep is likely to happen every 100ms
680 // with an arbitrary number of threads that do sweeping.
681 wait_time = 100 * CICompilerCount;
682 }
683 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time);
684 if (timeout) {
685 MutexUnlocker ul(lock());
686 NMethodSweeper::possibly_sweep();
687 }
688 } else {
689 // If there are no compilation tasks and we can compile new jobs
690 // (i.e., there is enough free space in the code cache) there is
691 // no need to invoke the sweeper. As a result, the hotness of methods
692 // remains unchanged. This behavior is desired, since we want to keep
693 // the stable state, i.e., we do not want to evict methods from the
694 // code cache if it is unnecessary.
695 // We need a timed wait here, since compiler threads can exit if compilation
696 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads
697 // is not critical and we do not want idle compiler threads to wake up too often.
698 lock()->wait(!Mutex::_no_safepoint_check_flag, 5*1000);
699 }
700 }
701
702 if (CompileBroker::is_compilation_disabled_forever()) {
703 return NULL;
704 }
705
706 CompileTask* task;
707 {
708 No_Safepoint_Verifier nsv;
709 task = CompilationPolicy::policy()->select_task(this);
710 }
711 remove(task);
712 purge_stale_tasks(); // may temporarily release MCQ lock
713 return task;
714 }
715
716 // Clean & deallocate stale compile tasks.
717 // Temporarily releases MethodCompileQueue lock.
718 void CompileQueue::purge_stale_tasks() {
719 assert(lock()->owned_by_self(), "must own lock");
720 if (_first_stale != NULL) {
721 // Stale tasks are purged when MCQ lock is released,
722 // but _first_stale updates are protected by MCQ lock.
723 // Once task processing starts and MCQ lock is released,
724 // other compiler threads can reuse _first_stale.
725 CompileTask* head = _first_stale;
726 _first_stale = NULL;
727 {
728 MutexUnlocker ul(lock());
729 for (CompileTask* task = head; task != NULL; ) {
730 CompileTask* next_task = task->next();
731 CompileTaskWrapper ctw(task); // Frees the task
732 task->set_failure_reason("stale task");
733 task = next_task;
734 }
735 }
736 }
737 }
738
739 void CompileQueue::remove(CompileTask* task) {
740 assert(lock()->owned_by_self(), "must own lock");
741 if (task->prev() != NULL) {
742 task->prev()->set_next(task->next());
743 } else {
744 // max is the first element
745 assert(task == _first, "Sanity");
746 _first = task->next();
747 }
748
749 if (task->next() != NULL) {
750 task->next()->set_prev(task->prev());
751 } else {
752 // max is the last element
753 assert(task == _last, "Sanity");
754 _last = task->prev();
755 }
756 --_size;
757 }
758
759 void CompileQueue::remove_and_mark_stale(CompileTask* task) {
760 assert(lock()->owned_by_self(), "must own lock");
761 remove(task);
762
763 // Enqueue the task for reclamation (should be done outside MCQ lock)
764 task->set_next(_first_stale);
765 task->set_prev(NULL);
766 _first_stale = task;
767 }
768
769 // methods in the compile queue need to be marked as used on the stack
770 // so that they don't get reclaimed by Redefine Classes
771 void CompileQueue::mark_on_stack() {
772 CompileTask* task = _first;
773 while (task != NULL) {
774 task->mark_on_stack();
775 task = task->next();
776 }
777 }
778
779
780 CompileQueue* CompileBroker::compile_queue(int comp_level) {
781 if (is_c2_compile(comp_level)) return _c2_compile_queue;
782 if (is_c1_compile(comp_level)) return _c1_compile_queue;
783 return NULL;
784 }
785
786
787 void CompileBroker::print_compile_queues(outputStream* st) {
788 MutexLocker locker(MethodCompileQueue_lock);
789 if (_c1_compile_queue != NULL) {
790 _c1_compile_queue->print(st);
791 }
792 if (_c2_compile_queue != NULL) {
793 _c2_compile_queue->print(st);
794 }
795 }
796
797 void CompileQueue::print(outputStream* st) {
798 assert(lock()->owned_by_self(), "must own lock");
799 st->print_cr("Contents of %s", name());
800 st->print_cr("----------------------------");
801 CompileTask* task = _first;
802 if (task == NULL) {
803 st->print_cr("Empty");
804 } else {
805 while (task != NULL) {
806 task->print_compilation(st, NULL, true, true);
807 task = task->next();
808 }
809 }
810 st->print_cr("----------------------------");
811 }
812
813 void CompileQueue::print_tty() {
814 ttyLocker ttyl;
815 print(tty);
816 }
817
818 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
819
820 _current_method[0] = '\0';
821 _compile_type = CompileBroker::no_compile;
822
823 if (UsePerfData) {
824 ResourceMark rm;
825
826 // create the thread instance name space string - don't create an
827 // instance subspace if instance is -1 - keeps the adapterThread
828 // counters from having a ".0" namespace.
829 const char* thread_i = (instance == -1) ? thread_name :
830 PerfDataManager::name_space(thread_name, instance);
831
832
833 char* name = PerfDataManager::counter_name(thread_i, "method");
834 _perf_current_method =
835 PerfDataManager::create_string_variable(SUN_CI, name,
836 cmname_buffer_length,
837 _current_method, CHECK);
838
839 name = PerfDataManager::counter_name(thread_i, "type");
840 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
841 PerfData::U_None,
842 (jlong)_compile_type,
843 CHECK);
844
845 name = PerfDataManager::counter_name(thread_i, "time");
846 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
847 PerfData::U_Ticks, CHECK);
848
849 name = PerfDataManager::counter_name(thread_i, "compiles");
850 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
851 PerfData::U_Events, CHECK);
852 }
853 }
854
855 // ------------------------------------------------------------------
856 // CompileBroker::compilation_init
857 //
858 // Initialize the Compilation object
859 void CompileBroker::compilation_init() {
860 _last_method_compiled[0] = '\0';
861
862 // No need to initialize compilation system if we do not use it.
863 if (!UseCompiler) {
864 return;
865 }
866 #ifndef SHARK
867 // Set the interface to the current compiler(s).
868 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple);
869 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization);
870 #ifdef COMPILER1
871 if (c1_count > 0) {
872 _compilers[0] = new Compiler();
873 }
874 #endif // COMPILER1
875
876 #ifdef COMPILER2
877 if (c2_count > 0) {
878 _compilers[1] = new C2Compiler();
879 }
880 #endif // COMPILER2
881
882 #else // SHARK
883 int c1_count = 0;
884 int c2_count = 1;
885
886 _compilers[1] = new SharkCompiler();
887 #endif // SHARK
888
889 // Start the CompilerThreads
890 init_compiler_threads(c1_count, c2_count);
891 // totalTime performance counter is always created as it is required
892 // by the implementation of java.lang.management.CompilationMBean.
893 {
894 EXCEPTION_MARK;
895 _perf_total_compilation =
896 PerfDataManager::create_counter(JAVA_CI, "totalTime",
897 PerfData::U_Ticks, CHECK);
898 }
899
900
901 if (UsePerfData) {
902
903 EXCEPTION_MARK;
904
905 // create the jvmstat performance counters
906 _perf_osr_compilation =
907 PerfDataManager::create_counter(SUN_CI, "osrTime",
908 PerfData::U_Ticks, CHECK);
909
910 _perf_standard_compilation =
911 PerfDataManager::create_counter(SUN_CI, "standardTime",
912 PerfData::U_Ticks, CHECK);
913
914 _perf_total_bailout_count =
915 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
916 PerfData::U_Events, CHECK);
917
918 _perf_total_invalidated_count =
919 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
920 PerfData::U_Events, CHECK);
921
922 _perf_total_compile_count =
923 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
924 PerfData::U_Events, CHECK);
925 _perf_total_osr_compile_count =
926 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
927 PerfData::U_Events, CHECK);
928
929 _perf_total_standard_compile_count =
930 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
931 PerfData::U_Events, CHECK);
932
933 _perf_sum_osr_bytes_compiled =
934 PerfDataManager::create_counter(SUN_CI, "osrBytes",
935 PerfData::U_Bytes, CHECK);
936
937 _perf_sum_standard_bytes_compiled =
938 PerfDataManager::create_counter(SUN_CI, "standardBytes",
939 PerfData::U_Bytes, CHECK);
940
941 _perf_sum_nmethod_size =
942 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
943 PerfData::U_Bytes, CHECK);
944
945 _perf_sum_nmethod_code_size =
946 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
947 PerfData::U_Bytes, CHECK);
948
949 _perf_last_method =
950 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
951 CompilerCounters::cmname_buffer_length,
952 "", CHECK);
953
954 _perf_last_failed_method =
955 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
956 CompilerCounters::cmname_buffer_length,
957 "", CHECK);
958
959 _perf_last_invalidated_method =
960 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
961 CompilerCounters::cmname_buffer_length,
962 "", CHECK);
963
964 _perf_last_compile_type =
965 PerfDataManager::create_variable(SUN_CI, "lastType",
966 PerfData::U_None,
967 (jlong)CompileBroker::no_compile,
968 CHECK);
969
970 _perf_last_compile_size =
971 PerfDataManager::create_variable(SUN_CI, "lastSize",
972 PerfData::U_Bytes,
973 (jlong)CompileBroker::no_compile,
974 CHECK);
975
976
977 _perf_last_failed_type =
978 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
979 PerfData::U_None,
980 (jlong)CompileBroker::no_compile,
981 CHECK);
982
983 _perf_last_invalidated_type =
984 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
985 PerfData::U_None,
986 (jlong)CompileBroker::no_compile,
987 CHECK);
988 }
989
990 _initialized = true;
991 }
992
993
994 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters,
995 AbstractCompiler* comp, TRAPS) {
996 CompilerThread* compiler_thread = NULL;
997
998 Klass* k =
999 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(),
1000 true, CHECK_0);
1001 instanceKlassHandle klass (THREAD, k);
1002 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
1003 Handle string = java_lang_String::create_from_str(name, CHECK_0);
1004
1005 // Initialize thread_oop to put it into the system threadGroup
1006 Handle thread_group (THREAD, Universe::system_thread_group());
1007 JavaValue result(T_VOID);
1008 JavaCalls::call_special(&result, thread_oop,
1009 klass,
1010 vmSymbols::object_initializer_name(),
1011 vmSymbols::threadgroup_string_void_signature(),
1012 thread_group,
1013 string,
1014 CHECK_0);
1015
1016 {
1017 MutexLocker mu(Threads_lock, THREAD);
1018 compiler_thread = new CompilerThread(queue, counters);
1019 // At this point the new CompilerThread data-races with this startup
1020 // thread (which I believe is the primoridal thread and NOT the VM
1021 // thread). This means Java bytecodes being executed at startup can
1022 // queue compile jobs which will run at whatever default priority the
1023 // newly created CompilerThread runs at.
1024
1025
1026 // At this point it may be possible that no osthread was created for the
1027 // JavaThread due to lack of memory. We would have to throw an exception
1028 // in that case. However, since this must work and we do not allow
1029 // exceptions anyway, check and abort if this fails.
1030
1031 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
1032 vm_exit_during_initialization("java.lang.OutOfMemoryError",
1033 os::native_thread_creation_failed_msg());
1034 }
1035
1036 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
1037
1038 // Note that this only sets the JavaThread _priority field, which by
1039 // definition is limited to Java priorities and not OS priorities.
1040 // The os-priority is set in the CompilerThread startup code itself
1041
1042 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
1043
1044 // Note that we cannot call os::set_priority because it expects Java
1045 // priorities and we are *explicitly* using OS priorities so that it's
1046 // possible to set the compiler thread priority higher than any Java
1047 // thread.
1048
1049 int native_prio = CompilerThreadPriority;
1050 if (native_prio == -1) {
1051 if (UseCriticalCompilerThreadPriority) {
1052 native_prio = os::java_to_os_priority[CriticalPriority];
1053 } else {
1054 native_prio = os::java_to_os_priority[NearMaxPriority];
1055 }
1056 }
1057 os::set_native_priority(compiler_thread, native_prio);
1058
1059 java_lang_Thread::set_daemon(thread_oop());
1060
1061 compiler_thread->set_threadObj(thread_oop());
1062 compiler_thread->set_compiler(comp);
1063 Threads::add(compiler_thread);
1064 Thread::start(compiler_thread);
1065 }
1066
1067 // Let go of Threads_lock before yielding
1068 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
1069
1070 return compiler_thread;
1071 }
1072
1073
1074 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) {
1075 EXCEPTION_MARK;
1076 #if !defined(ZERO) && !defined(SHARK)
1077 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?");
1078 #endif // !ZERO && !SHARK
1079 // Initialize the compilation queue
1080 if (c2_compiler_count > 0) {
1081 _c2_compile_queue = new CompileQueue("C2 compile queue", MethodCompileQueue_lock);
1082 _compilers[1]->set_num_compiler_threads(c2_compiler_count);
1083 }
1084 if (c1_compiler_count > 0) {
1085 _c1_compile_queue = new CompileQueue("C1 compile queue", MethodCompileQueue_lock);
1086 _compilers[0]->set_num_compiler_threads(c1_compiler_count);
1087 }
1088
1089 int compiler_count = c1_compiler_count + c2_compiler_count;
1090
1091 _compiler_threads =
1092 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true);
1093
1094 char name_buffer[256];
1095 for (int i = 0; i < c2_compiler_count; i++) {
1096 // Create a name for our thread.
1097 sprintf(name_buffer, "C2 CompilerThread%d", i);
1098 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1099 // Shark and C2
1100 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], CHECK);
1101 _compiler_threads->append(new_thread);
1102 }
1103
1104 for (int i = c2_compiler_count; i < compiler_count; i++) {
1105 // Create a name for our thread.
1106 sprintf(name_buffer, "C1 CompilerThread%d", i);
1107 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
1108 // C1
1109 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], CHECK);
1110 _compiler_threads->append(new_thread);
1111 }
1112
1113 if (UsePerfData) {
1114 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK);
1115 }
1116 }
1117
1118
1119 /**
1120 * Set the methods on the stack as on_stack so that redefine classes doesn't
1121 * reclaim them. This method is executed at a safepoint.
1122 */
1123 void CompileBroker::mark_on_stack() {
1124 assert(SafepointSynchronize::is_at_safepoint(), "sanity check");
1125 // Since we are at a safepoint, we do not need a lock to access
1126 // the compile queues.
1127 if (_c2_compile_queue != NULL) {
1128 _c2_compile_queue->mark_on_stack();
1129 }
1130 if (_c1_compile_queue != NULL) {
1131 _c1_compile_queue->mark_on_stack();
1132 }
1133 }
1134
1135 // ------------------------------------------------------------------
1136 // CompileBroker::compile_method
1137 //
1138 // Request compilation of a method.
1139 void CompileBroker::compile_method_base(methodHandle method,
1140 int osr_bci,
1141 int comp_level,
1142 methodHandle hot_method,
1143 int hot_count,
1144 const char* comment,
1145 Thread* thread) {
1146 // do nothing if compiler thread(s) is not available
1147 if (!_initialized) {
1148 return;
1149 }
1150
1151 guarantee(!method->is_abstract(), "cannot compile abstract methods");
1152 assert(method->method_holder()->oop_is_instance(),
1153 "sanity check");
1154 assert(!method->method_holder()->is_not_initialized(),
1155 "method holder must be initialized");
1156 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys");
1157
1158 if (CIPrintRequests) {
1159 tty->print("request: ");
1160 method->print_short_name(tty);
1161 if (osr_bci != InvocationEntryBci) {
1162 tty->print(" osr_bci: %d", osr_bci);
1163 }
1164 tty->print(" comment: %s count: %d", comment, hot_count);
1165 if (!hot_method.is_null()) {
1166 tty->print(" hot: ");
1167 if (hot_method() != method()) {
1168 hot_method->print_short_name(tty);
1169 } else {
1170 tty->print("yes");
1171 }
1172 }
1173 tty->cr();
1174 }
1175
1176 // A request has been made for compilation. Before we do any
1177 // real work, check to see if the method has been compiled
1178 // in the meantime with a definitive result.
1179 if (compilation_is_complete(method, osr_bci, comp_level)) {
1180 return;
1181 }
1182
1183 #ifndef PRODUCT
1184 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) {
1185 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) {
1186 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI.
1187 return;
1188 }
1189 }
1190 #endif
1191
1192 // If this method is already in the compile queue, then
1193 // we do not block the current thread.
1194 if (compilation_is_in_queue(method)) {
1195 // We may want to decay our counter a bit here to prevent
1196 // multiple denied requests for compilation. This is an
1197 // open compilation policy issue. Note: The other possibility,
1198 // in the case that this is a blocking compile request, is to have
1199 // all subsequent blocking requesters wait for completion of
1200 // ongoing compiles. Note that in this case we'll need a protocol
1201 // for freeing the associated compile tasks. [Or we could have
1202 // a single static monitor on which all these waiters sleep.]
1203 return;
1204 }
1205
1206 // If the requesting thread is holding the pending list lock
1207 // then we just return. We can't risk blocking while holding
1208 // the pending list lock or a 3-way deadlock may occur
1209 // between the reference handler thread, a GC (instigated
1210 // by a compiler thread), and compiled method registration.
1211 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) {
1212 return;
1213 }
1214
1215 if (TieredCompilation) {
1216 // Tiered policy requires MethodCounters to exist before adding a method to
1217 // the queue. Create if we don't have them yet.
1218 method->get_method_counters(thread);
1219 }
1220
1221 // Outputs from the following MutexLocker block:
1222 CompileTask* task = NULL;
1223 bool blocking = false;
1224 CompileQueue* queue = compile_queue(comp_level);
1225
1226 // Acquire our lock.
1227 {
1228 MutexLocker locker(queue->lock(), thread);
1229
1230 // Make sure the method has not slipped into the queues since
1231 // last we checked; note that those checks were "fast bail-outs".
1232 // Here we need to be more careful, see 14012000 below.
1233 if (compilation_is_in_queue(method)) {
1234 return;
1235 }
1236
1237 // We need to check again to see if the compilation has
1238 // completed. A previous compilation may have registered
1239 // some result.
1240 if (compilation_is_complete(method, osr_bci, comp_level)) {
1241 return;
1242 }
1243
1244 // We now know that this compilation is not pending, complete,
1245 // or prohibited. Assign a compile_id to this compilation
1246 // and check to see if it is in our [Start..Stop) range.
1247 int compile_id = assign_compile_id(method, osr_bci);
1248 if (compile_id == 0) {
1249 // The compilation falls outside the allowed range.
1250 return;
1251 }
1252
1253 // Should this thread wait for completion of the compile?
1254 blocking = is_compile_blocking();
1255
1256 // We will enter the compilation in the queue.
1257 // 14012000: Note that this sets the queued_for_compile bits in
1258 // the target method. We can now reason that a method cannot be
1259 // queued for compilation more than once, as follows:
1260 // Before a thread queues a task for compilation, it first acquires
1261 // the compile queue lock, then checks if the method's queued bits
1262 // are set or it has already been compiled. Thus there can not be two
1263 // instances of a compilation task for the same method on the
1264 // compilation queue. Consider now the case where the compilation
1265 // thread has already removed a task for that method from the queue
1266 // and is in the midst of compiling it. In this case, the
1267 // queued_for_compile bits must be set in the method (and these
1268 // will be visible to the current thread, since the bits were set
1269 // under protection of the compile queue lock, which we hold now.
1270 // When the compilation completes, the compiler thread first sets
1271 // the compilation result and then clears the queued_for_compile
1272 // bits. Neither of these actions are protected by a barrier (or done
1273 // under the protection of a lock), so the only guarantee we have
1274 // (on machines with TSO (Total Store Order)) is that these values
1275 // will update in that order. As a result, the only combinations of
1276 // these bits that the current thread will see are, in temporal order:
1277 // <RESULT, QUEUE> :
1278 // <0, 1> : in compile queue, but not yet compiled
1279 // <1, 1> : compiled but queue bit not cleared
1280 // <1, 0> : compiled and queue bit cleared
1281 // Because we first check the queue bits then check the result bits,
1282 // we are assured that we cannot introduce a duplicate task.
1283 // Note that if we did the tests in the reverse order (i.e. check
1284 // result then check queued bit), we could get the result bit before
1285 // the compilation completed, and the queue bit after the compilation
1286 // completed, and end up introducing a "duplicate" (redundant) task.
1287 // In that case, the compiler thread should first check if a method
1288 // has already been compiled before trying to compile it.
1289 // NOTE: in the event that there are multiple compiler threads and
1290 // there is de-optimization/recompilation, things will get hairy,
1291 // and in that case it's best to protect both the testing (here) of
1292 // these bits, and their updating (here and elsewhere) under a
1293 // common lock.
1294 task = create_compile_task(queue,
1295 compile_id, method,
1296 osr_bci, comp_level,
1297 hot_method, hot_count, comment,
1298 blocking);
1299 }
1300
1301 if (blocking) {
1302 wait_for_completion(task);
1303 }
1304 }
1305
1306
1307 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
1308 int comp_level,
1309 methodHandle hot_method, int hot_count,
1310 const char* comment, Thread* THREAD) {
1311 // make sure arguments make sense
1312 assert(method->method_holder()->oop_is_instance(), "not an instance method");
1313 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
1314 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
1315 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized");
1316 // allow any levels for WhiteBox
1317 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered");
1318 // return quickly if possible
1319
1320 // lock, make sure that the compilation
1321 // isn't prohibited in a straightforward way.
1322 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
1323 if (comp == NULL || !comp->can_compile_method(method) ||
1324 compilation_is_prohibited(method, osr_bci, comp_level)) {
1325 return NULL;
1326 }
1327
1328 if (osr_bci == InvocationEntryBci) {
1329 // standard compilation
1330 nmethod* method_code = method->code();
1331 if (method_code != NULL) {
1332 if (compilation_is_complete(method, osr_bci, comp_level)) {
1333 return method_code;
1334 }
1335 }
1336 if (method->is_not_compilable(comp_level)) {
1337 return NULL;
1338 }
1339 } else {
1340 // osr compilation
1341 #ifndef TIERED
1342 // seems like an assert of dubious value
1343 assert(comp_level == CompLevel_highest_tier,
1344 "all OSR compiles are assumed to be at a single compilation lavel");
1345 #endif // TIERED
1346 // We accept a higher level osr method
1347 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1348 if (nm != NULL) return nm;
1349 if (method->is_not_osr_compilable(comp_level)) return NULL;
1350 }
1351
1352 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1353 // some prerequisites that are compiler specific
1354 if (comp->is_c2() || comp->is_shark()) {
1355 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL);
1356 // Resolve all classes seen in the signature of the method
1357 // we are compiling.
1358 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL);
1359 }
1360
1361 // If the method is native, do the lookup in the thread requesting
1362 // the compilation. Native lookups can load code, which is not
1363 // permitted during compilation.
1364 //
1365 // Note: A native method implies non-osr compilation which is
1366 // checked with an assertion at the entry of this method.
1367 if (method->is_native() && !method->is_method_handle_intrinsic()) {
1368 bool in_base_library;
1369 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1370 if (HAS_PENDING_EXCEPTION) {
1371 // In case of an exception looking up the method, we just forget
1372 // about it. The interpreter will kick-in and throw the exception.
1373 method->set_not_compilable(); // implies is_not_osr_compilable()
1374 CLEAR_PENDING_EXCEPTION;
1375 return NULL;
1376 }
1377 assert(method->has_native_function(), "must have native code by now");
1378 }
1379
1380 // RedefineClasses() has replaced this method; just return
1381 if (method->is_old()) {
1382 return NULL;
1383 }
1384
1385 // JVMTI -- post_compile_event requires jmethod_id() that may require
1386 // a lock the compiling thread can not acquire. Prefetch it here.
1387 if (JvmtiExport::should_post_compiled_method_load()) {
1388 method->jmethod_id();
1389 }
1390
1391 // do the compilation
1392 if (method->is_native()) {
1393 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) {
1394 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that
1395 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime).
1396 //
1397 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter
1398 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls.
1399 AdapterHandlerLibrary::create_native_wrapper(method);
1400 } else {
1401 return NULL;
1402 }
1403 } else {
1404 // If the compiler is shut off due to code cache getting full
1405 // fail out now so blocking compiles dont hang the java thread
1406 if (!should_compile_new_jobs()) {
1407 CompilationPolicy::policy()->delay_compilation(method());
1408 return NULL;
1409 }
1410 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD);
1411 }
1412
1413 // return requested nmethod
1414 // We accept a higher level osr method
1415 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false);
1416 }
1417
1418
1419 // ------------------------------------------------------------------
1420 // CompileBroker::compilation_is_complete
1421 //
1422 // See if compilation of this method is already complete.
1423 bool CompileBroker::compilation_is_complete(methodHandle method,
1424 int osr_bci,
1425 int comp_level) {
1426 bool is_osr = (osr_bci != standard_entry_bci);
1427 if (is_osr) {
1428 if (method->is_not_osr_compilable(comp_level)) {
1429 return true;
1430 } else {
1431 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true);
1432 return (result != NULL);
1433 }
1434 } else {
1435 if (method->is_not_compilable(comp_level)) {
1436 return true;
1437 } else {
1438 nmethod* result = method->code();
1439 if (result == NULL) return false;
1440 return comp_level == result->comp_level();
1441 }
1442 }
1443 }
1444
1445
1446 /**
1447 * See if this compilation is already requested.
1448 *
1449 * Implementation note: there is only a single "is in queue" bit
1450 * for each method. This means that the check below is overly
1451 * conservative in the sense that an osr compilation in the queue
1452 * will block a normal compilation from entering the queue (and vice
1453 * versa). This can be remedied by a full queue search to disambiguate
1454 * cases. If it is deemed profitable, this may be done.
1455 */
1456 bool CompileBroker::compilation_is_in_queue(methodHandle method) {
1457 return method->queued_for_compilation();
1458 }
1459
1460 // ------------------------------------------------------------------
1461 // CompileBroker::compilation_is_prohibited
1462 //
1463 // See if this compilation is not allowed.
1464 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1465 bool is_native = method->is_native();
1466 // Some compilers may not support the compilation of natives.
1467 AbstractCompiler *comp = compiler(comp_level);
1468 if (is_native &&
1469 (!CICompileNatives || comp == NULL || !comp->supports_native())) {
1470 method->set_not_compilable_quietly(comp_level);
1471 return true;
1472 }
1473
1474 bool is_osr = (osr_bci != standard_entry_bci);
1475 // Some compilers may not support on stack replacement.
1476 if (is_osr &&
1477 (!CICompileOSR || comp == NULL || !comp->supports_osr())) {
1478 method->set_not_osr_compilable(comp_level);
1479 return true;
1480 }
1481
1482 // The method may be explicitly excluded by the user.
1483 bool quietly;
1484 if (CompilerOracle::should_exclude(method, quietly)) {
1485 if (!quietly) {
1486 // This does not happen quietly...
1487 ResourceMark rm;
1488 tty->print("### Excluding %s:%s",
1489 method->is_native() ? "generation of native wrapper" : "compile",
1490 (method->is_static() ? " static" : ""));
1491 method->print_short_name(tty);
1492 tty->cr();
1493 }
1494 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle");
1495 }
1496
1497 return false;
1498 }
1499
1500 /**
1501 * Generate serialized IDs for compilation requests. If certain debugging flags are used
1502 * and the ID is not within the specified range, the method is not compiled and 0 is returned.
1503 * The function also allows to generate separate compilation IDs for OSR compilations.
1504 */
1505 int CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1506 #ifdef ASSERT
1507 bool is_osr = (osr_bci != standard_entry_bci);
1508 int id;
1509 if (method->is_native()) {
1510 assert(!is_osr, "can't be osr");
1511 // Adapters, native wrappers and method handle intrinsics
1512 // should be generated always.
1513 return Atomic::add(1, &_compilation_id);
1514 } else if (CICountOSR && is_osr) {
1515 id = Atomic::add(1, &_osr_compilation_id);
1516 if (CIStartOSR <= id && id < CIStopOSR) {
1517 return id;
1518 }
1519 } else {
1520 id = Atomic::add(1, &_compilation_id);
1521 if (CIStart <= id && id < CIStop) {
1522 return id;
1523 }
1524 }
1525
1526 // Method was not in the appropriate compilation range.
1527 method->set_not_compilable_quietly();
1528 return 0;
1529 #else
1530 // CICountOSR is a develop flag and set to 'false' by default. In a product built,
1531 // only _compilation_id is incremented.
1532 return Atomic::add(1, &_compilation_id);
1533 #endif
1534 }
1535
1536 /**
1537 * Should the current thread block until this compilation request
1538 * has been fulfilled?
1539 */
1540 bool CompileBroker::is_compile_blocking() {
1541 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock");
1542 return !BackgroundCompilation;
1543 }
1544
1545
1546 // ------------------------------------------------------------------
1547 // CompileBroker::preload_classes
1548 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1549 // Move this code over from c1_Compiler.cpp
1550 ShouldNotReachHere();
1551 }
1552
1553
1554 // ------------------------------------------------------------------
1555 // CompileBroker::create_compile_task
1556 //
1557 // Create a CompileTask object representing the current request for
1558 // compilation. Add this task to the queue.
1559 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1560 int compile_id,
1561 methodHandle method,
1562 int osr_bci,
1563 int comp_level,
1564 methodHandle hot_method,
1565 int hot_count,
1566 const char* comment,
1567 bool blocking) {
1568 CompileTask* new_task = CompileTask::allocate();
1569 new_task->initialize(compile_id, method, osr_bci, comp_level,
1570 hot_method, hot_count, comment,
1571 blocking);
1572 queue->add(new_task);
1573 return new_task;
1574 }
1575
1576
1577 /**
1578 * Wait for the compilation task to complete.
1579 */
1580 void CompileBroker::wait_for_completion(CompileTask* task) {
1581 if (CIPrintCompileQueue) {
1582 ttyLocker ttyl;
1583 tty->print_cr("BLOCKING FOR COMPILE");
1584 }
1585
1586 assert(task->is_blocking(), "can only wait on blocking task");
1587
1588 JavaThread* thread = JavaThread::current();
1589 thread->set_blocked_on_compilation(true);
1590
1591 methodHandle method(thread, task->method());
1592 {
1593 MutexLocker waiter(task->lock(), thread);
1594
1595 while (!task->is_complete() && !is_compilation_disabled_forever()) {
1596 task->lock()->wait();
1597 }
1598 }
1599
1600 thread->set_blocked_on_compilation(false);
1601 if (is_compilation_disabled_forever()) {
1602 CompileTask::free(task);
1603 return;
1604 }
1605
1606 // It is harmless to check this status without the lock, because
1607 // completion is a stable property (until the task object is recycled).
1608 assert(task->is_complete(), "Compilation should have completed");
1609 assert(task->code_handle() == NULL, "must be reset");
1610
1611 // By convention, the waiter is responsible for recycling a
1612 // blocking CompileTask. Since there is only one waiter ever
1613 // waiting on a CompileTask, we know that no one else will
1614 // be using this CompileTask; we can free it.
1615 CompileTask::free(task);
1616 }
1617
1618 /**
1619 * Initialize compiler thread(s) + compiler object(s). The postcondition
1620 * of this function is that the compiler runtimes are initialized and that
1621 * compiler threads can start compiling.
1622 */
1623 bool CompileBroker::init_compiler_runtime() {
1624 CompilerThread* thread = CompilerThread::current();
1625 AbstractCompiler* comp = thread->compiler();
1626 // Final sanity check - the compiler object must exist
1627 guarantee(comp != NULL, "Compiler object must exist");
1628
1629 int system_dictionary_modification_counter;
1630 {
1631 MutexLocker locker(Compile_lock, thread);
1632 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1633 }
1634
1635 {
1636 // Must switch to native to allocate ci_env
1637 ThreadToNativeFromVM ttn(thread);
1638 ciEnv ci_env(NULL, system_dictionary_modification_counter);
1639 // Cache Jvmti state
1640 ci_env.cache_jvmti_state();
1641 // Cache DTrace flags
1642 ci_env.cache_dtrace_flags();
1643
1644 // Switch back to VM state to do compiler initialization
1645 ThreadInVMfromNative tv(thread);
1646 ResetNoHandleMark rnhm;
1647
1648
1649 if (!comp->is_shark()) {
1650 // Perform per-thread and global initializations
1651 comp->initialize();
1652 }
1653 }
1654
1655 if (comp->is_failed()) {
1656 disable_compilation_forever();
1657 // If compiler initialization failed, no compiler thread that is specific to a
1658 // particular compiler runtime will ever start to compile methods.
1659 shutdown_compiler_runtime(comp, thread);
1660 return false;
1661 }
1662
1663 // C1 specific check
1664 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) {
1665 warning("Initialization of %s thread failed (no space to run compilers)", thread->name());
1666 return false;
1667 }
1668
1669 return true;
1670 }
1671
1672 /**
1673 * If C1 and/or C2 initialization failed, we shut down all compilation.
1674 * We do this to keep things simple. This can be changed if it ever turns
1675 * out to be a problem.
1676 */
1677 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) {
1678 // Free buffer blob, if allocated
1679 if (thread->get_buffer_blob() != NULL) {
1680 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1681 CodeCache::free(thread->get_buffer_blob());
1682 }
1683
1684 if (comp->should_perform_shutdown()) {
1685 // There are two reasons for shutting down the compiler
1686 // 1) compiler runtime initialization failed
1687 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing
1688 warning("%s initialization failed. Shutting down all compilers", comp->name());
1689
1690 // Only one thread per compiler runtime object enters here
1691 // Set state to shut down
1692 comp->set_shut_down();
1693
1694 // Delete all queued compilation tasks to make compiler threads exit faster.
1695 if (_c1_compile_queue != NULL) {
1696 _c1_compile_queue->free_all();
1697 }
1698
1699 if (_c2_compile_queue != NULL) {
1700 _c2_compile_queue->free_all();
1701 }
1702
1703 // Set flags so that we continue execution with using interpreter only.
1704 UseCompiler = false;
1705 UseInterpreter = true;
1706
1707 // We could delete compiler runtimes also. However, there are references to
1708 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then
1709 // fail. This can be done later if necessary.
1710 }
1711 }
1712
1713 // ------------------------------------------------------------------
1714 // CompileBroker::compiler_thread_loop
1715 //
1716 // The main loop run by a CompilerThread.
1717 void CompileBroker::compiler_thread_loop() {
1718 CompilerThread* thread = CompilerThread::current();
1719 CompileQueue* queue = thread->queue();
1720 // For the thread that initializes the ciObjectFactory
1721 // this resource mark holds all the shared objects
1722 ResourceMark rm;
1723
1724 // First thread to get here will initialize the compiler interface
1725
1726 if (!ciObjectFactory::is_initialized()) {
1727 ASSERT_IN_VM;
1728 MutexLocker only_one (CompileThread_lock, thread);
1729 if (!ciObjectFactory::is_initialized()) {
1730 ciObjectFactory::initialize();
1731 }
1732 }
1733
1734 // Open a log.
1735 if (LogCompilation) {
1736 init_compiler_thread_log();
1737 }
1738 CompileLog* log = thread->log();
1739 if (log != NULL) {
1740 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'",
1741 thread->name(),
1742 os::current_thread_id(),
1743 os::current_process_id());
1744 log->stamp();
1745 log->end_elem();
1746 }
1747
1748 // If compiler thread/runtime initialization fails, exit the compiler thread
1749 if (!init_compiler_runtime()) {
1750 return;
1751 }
1752
1753 // Poll for new compilation tasks as long as the JVM runs. Compilation
1754 // should only be disabled if something went wrong while initializing the
1755 // compiler runtimes. This, in turn, should not happen. The only known case
1756 // when compiler runtime initialization fails is if there is not enough free
1757 // space in the code cache to generate the necessary stubs, etc.
1758 while (!is_compilation_disabled_forever()) {
1759 // We need this HandleMark to avoid leaking VM handles.
1760 HandleMark hm(thread);
1761
1762 // Check if the CodeCache is full
1763 int code_blob_type = 0;
1764 if (CodeCache::is_full(&code_blob_type)) {
1765 // The CodeHeap for code_blob_type is really full
1766 handle_full_code_cache(code_blob_type);
1767 }
1768
1769 CompileTask* task = queue->get();
1770 if (task == NULL) {
1771 continue;
1772 }
1773
1774 // Give compiler threads an extra quanta. They tend to be bursty and
1775 // this helps the compiler to finish up the job.
1776 if( CompilerThreadHintNoPreempt )
1777 os::hint_no_preempt();
1778
1779 // trace per thread time and compile statistics
1780 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1781 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1782
1783 // Assign the task to the current thread. Mark this compilation
1784 // thread as active for the profiler.
1785 CompileTaskWrapper ctw(task);
1786 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1787 task->set_code_handle(&result_handle);
1788 methodHandle method(thread, task->method());
1789
1790 // Never compile a method if breakpoints are present in it
1791 if (method()->number_of_breakpoints() == 0) {
1792 // Compile the method.
1793 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1794 invoke_compiler_on_method(task);
1795 } else {
1796 // After compilation is disabled, remove remaining methods from queue
1797 method->clear_queued_for_compilation();
1798 task->set_failure_reason("compilation is disabled");
1799 }
1800 }
1801 }
1802
1803 // Shut down compiler runtime
1804 shutdown_compiler_runtime(thread->compiler(), thread);
1805 }
1806
1807 // ------------------------------------------------------------------
1808 // CompileBroker::init_compiler_thread_log
1809 //
1810 // Set up state required by +LogCompilation.
1811 void CompileBroker::init_compiler_thread_log() {
1812 CompilerThread* thread = CompilerThread::current();
1813 char file_name[4*K];
1814 FILE* fp = NULL;
1815 intx thread_id = os::current_thread_id();
1816 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1817 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1818 if (dir == NULL) {
1819 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log",
1820 thread_id, os::current_process_id());
1821 } else {
1822 jio_snprintf(file_name, sizeof(file_name),
1823 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1824 os::file_separator(), thread_id, os::current_process_id());
1825 }
1826
1827 fp = fopen(file_name, "at");
1828 if (fp != NULL) {
1829 if (LogCompilation && Verbose) {
1830 tty->print_cr("Opening compilation log %s", file_name);
1831 }
1832 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id);
1833 thread->init_log(log);
1834
1835 if (xtty != NULL) {
1836 ttyLocker ttyl;
1837 // Record any per thread log files
1838 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name);
1839 }
1840 return;
1841 }
1842 }
1843 warning("Cannot open log file: %s", file_name);
1844 }
1845
1846 // ------------------------------------------------------------------
1847 // CompileBroker::set_should_block
1848 //
1849 // Set _should_block.
1850 // Call this from the VM, with Threads_lock held and a safepoint requested.
1851 void CompileBroker::set_should_block() {
1852 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1853 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1854 #ifndef PRODUCT
1855 if (PrintCompilation && (Verbose || WizardMode))
1856 tty->print_cr("notifying compiler thread pool to block");
1857 #endif
1858 _should_block = true;
1859 }
1860
1861 // ------------------------------------------------------------------
1862 // CompileBroker::maybe_block
1863 //
1864 // Call this from the compiler at convenient points, to poll for _should_block.
1865 void CompileBroker::maybe_block() {
1866 if (_should_block) {
1867 #ifndef PRODUCT
1868 if (PrintCompilation && (Verbose || WizardMode))
1869 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current()));
1870 #endif
1871 ThreadInVMfromNative tivfn(JavaThread::current());
1872 }
1873 }
1874
1875 // wrapper for CodeCache::print_summary()
1876 static void codecache_print(bool detailed)
1877 {
1878 ResourceMark rm;
1879 stringStream s;
1880 // Dump code cache into a buffer before locking the tty,
1881 {
1882 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1883 CodeCache::print_summary(&s, detailed);
1884 }
1885 ttyLocker ttyl;
1886 tty->print("%s", s.as_string());
1887 }
1888
1889 // ------------------------------------------------------------------
1890 // CompileBroker::invoke_compiler_on_method
1891 //
1892 // Compile a method.
1893 //
1894 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1895 if (PrintCompilation) {
1896 ResourceMark rm;
1897 task->print_tty();
1898 }
1899 elapsedTimer time;
1900
1901 CompilerThread* thread = CompilerThread::current();
1902 ResourceMark rm(thread);
1903
1904 if (LogEvents) {
1905 _compilation_log->log_compile(thread, task);
1906 }
1907
1908 // Common flags.
1909 uint compile_id = task->compile_id();
1910 int osr_bci = task->osr_bci();
1911 bool is_osr = (osr_bci != standard_entry_bci);
1912 bool should_log = (thread->log() != NULL);
1913 bool should_break = false;
1914 int task_level = task->comp_level();
1915 {
1916 // create the handle inside it's own block so it can't
1917 // accidentally be referenced once the thread transitions to
1918 // native. The NoHandleMark before the transition should catch
1919 // any cases where this occurs in the future.
1920 methodHandle method(thread, task->method());
1921 should_break = check_break_at(method, compile_id, is_osr);
1922 if (should_log && !CompilerOracle::should_log(method)) {
1923 should_log = false;
1924 }
1925 assert(!method->is_native(), "no longer compile natives");
1926
1927 // Save information about this method in case of failure.
1928 set_last_compile(thread, method, is_osr, task_level);
1929
1930 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level));
1931 }
1932
1933 // Allocate a new set of JNI handles.
1934 push_jni_handle_block();
1935 Method* target_handle = task->method();
1936 int compilable = ciEnv::MethodCompilable;
1937 {
1938 int system_dictionary_modification_counter;
1939 {
1940 MutexLocker locker(Compile_lock, thread);
1941 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1942 }
1943
1944 NoHandleMark nhm;
1945 ThreadToNativeFromVM ttn(thread);
1946
1947 ciEnv ci_env(task, system_dictionary_modification_counter);
1948 if (should_break) {
1949 ci_env.set_break_at_compile(true);
1950 }
1951 if (should_log) {
1952 ci_env.set_log(thread->log());
1953 }
1954 assert(thread->env() == &ci_env, "set by ci_env");
1955 // The thread-env() field is cleared in ~CompileTaskWrapper.
1956
1957 // Cache Jvmti state
1958 ci_env.cache_jvmti_state();
1959
1960 // Cache DTrace flags
1961 ci_env.cache_dtrace_flags();
1962
1963 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1964
1965 TraceTime t1("compilation", &time);
1966 EventCompilation event;
1967
1968 AbstractCompiler *comp = compiler(task_level);
1969 if (comp == NULL) {
1970 ci_env.record_method_not_compilable("no compiler", !TieredCompilation);
1971 } else {
1972 comp->compile_method(&ci_env, target, osr_bci);
1973 }
1974
1975 if (!ci_env.failing() && task->code() == NULL) {
1976 //assert(false, "compiler should always document failure");
1977 // The compiler elected, without comment, not to register a result.
1978 // Do not attempt further compilations of this method.
1979 ci_env.record_method_not_compilable("compile failed", !TieredCompilation);
1980 }
1981
1982 // Copy this bit to the enclosing block:
1983 compilable = ci_env.compilable();
1984
1985 if (ci_env.failing()) {
1986 task->set_failure_reason(ci_env.failure_reason());
1987 const char* retry_message = ci_env.retry_message();
1988 if (_compilation_log != NULL) {
1989 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message);
1990 }
1991 if (PrintCompilation) {
1992 FormatBufferResource msg = retry_message != NULL ?
1993 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) :
1994 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason());
1995 task->print_compilation(tty, msg);
1996 }
1997 } else {
1998 task->mark_success();
1999 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
2000 if (_compilation_log != NULL) {
2001 nmethod* code = task->code();
2002 if (code != NULL) {
2003 _compilation_log->log_nmethod(thread, code);
2004 }
2005 }
2006 }
2007 // simulate crash during compilation
2008 assert(task->compile_id() != CICrashAt, "just as planned");
2009 if (event.should_commit()) {
2010 event.set_method(target->get_Method());
2011 event.set_compileID(compile_id);
2012 event.set_compileLevel(task->comp_level());
2013 event.set_succeded(task->is_success());
2014 event.set_isOsr(is_osr);
2015 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size());
2016 event.set_inlinedBytes(task->num_inlined_bytecodes());
2017 event.commit();
2018 }
2019 }
2020 pop_jni_handle_block();
2021
2022 methodHandle method(thread, task->method());
2023
2024 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success());
2025
2026 collect_statistics(thread, time, task);
2027
2028 if (PrintCompilation && PrintCompilation2) {
2029 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp
2030 tty->print("%4d ", compile_id); // print compilation number
2031 tty->print("%s ", (is_osr ? "%" : " "));
2032 if (task->code() != NULL) {
2033 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size());
2034 }
2035 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes());
2036 }
2037
2038 if (PrintCodeCacheOnCompilation)
2039 codecache_print(/* detailed= */ false);
2040
2041 // Disable compilation, if required.
2042 switch (compilable) {
2043 case ciEnv::MethodCompilable_never:
2044 if (is_osr)
2045 method->set_not_osr_compilable_quietly();
2046 else
2047 method->set_not_compilable_quietly();
2048 break;
2049 case ciEnv::MethodCompilable_not_at_tier:
2050 if (is_osr)
2051 method->set_not_osr_compilable_quietly(task_level);
2052 else
2053 method->set_not_compilable_quietly(task_level);
2054 break;
2055 }
2056
2057 // Note that the queued_for_compilation bits are cleared without
2058 // protection of a mutex. [They were set by the requester thread,
2059 // when adding the task to the compile queue -- at which time the
2060 // compile queue lock was held. Subsequently, we acquired the compile
2061 // queue lock to get this task off the compile queue; thus (to belabour
2062 // the point somewhat) our clearing of the bits must be occurring
2063 // only after the setting of the bits. See also 14012000 above.
2064 method->clear_queued_for_compilation();
2065
2066 #ifdef ASSERT
2067 if (CollectedHeap::fired_fake_oom()) {
2068 // The current compile received a fake OOM during compilation so
2069 // go ahead and exit the VM since the test apparently succeeded
2070 tty->print_cr("*** Shutting down VM after successful fake OOM");
2071 vm_exit(0);
2072 }
2073 #endif
2074 }
2075
2076 /**
2077 * The CodeCache is full. Print out warning and disable compilation
2078 * or try code cache cleaning so compilation can continue later.
2079 */
2080 void CompileBroker::handle_full_code_cache(int code_blob_type) {
2081 UseInterpreter = true;
2082 if (UseCompiler || AlwaysCompileLoopMethods ) {
2083 if (xtty != NULL) {
2084 ResourceMark rm;
2085 stringStream s;
2086 // Dump code cache state into a buffer before locking the tty,
2087 // because log_state() will use locks causing lock conflicts.
2088 CodeCache::log_state(&s);
2089 // Lock to prevent tearing
2090 ttyLocker ttyl;
2091 xtty->begin_elem("code_cache_full");
2092 xtty->print("%s", s.as_string());
2093 xtty->stamp();
2094 xtty->end_elem();
2095 }
2096
2097 #ifndef PRODUCT
2098 if (CompileTheWorld || ExitOnFullCodeCache) {
2099 codecache_print(/* detailed= */ true);
2100 before_exit(JavaThread::current());
2101 exit_globals(); // will delete tty
2102 vm_direct_exit(CompileTheWorld ? 0 : 1);
2103 }
2104 #endif
2105 if (UseCodeCacheFlushing) {
2106 // Since code cache is full, immediately stop new compiles
2107 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
2108 NMethodSweeper::log_sweep("disable_compiler");
2109 }
2110 // Switch to 'vm_state'. This ensures that possibly_sweep() can be called
2111 // without having to consider the state in which the current thread is.
2112 ThreadInVMfromUnknown in_vm;
2113 NMethodSweeper::possibly_sweep();
2114 } else {
2115 disable_compilation_forever();
2116 }
2117
2118 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning());
2119 }
2120 }
2121
2122 // ------------------------------------------------------------------
2123 // CompileBroker::set_last_compile
2124 //
2125 // Record this compilation for debugging purposes.
2126 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
2127 ResourceMark rm;
2128 char* method_name = method->name()->as_C_string();
2129 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
2130 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated
2131 char current_method[CompilerCounters::cmname_buffer_length];
2132 size_t maxLen = CompilerCounters::cmname_buffer_length;
2133
2134 if (UsePerfData) {
2135 const char* class_name = method->method_holder()->name()->as_C_string();
2136
2137 size_t s1len = strlen(class_name);
2138 size_t s2len = strlen(method_name);
2139
2140 // check if we need to truncate the string
2141 if (s1len + s2len + 2 > maxLen) {
2142
2143 // the strategy is to lop off the leading characters of the
2144 // class name and the trailing characters of the method name.
2145
2146 if (s2len + 2 > maxLen) {
2147 // lop of the entire class name string, let snprintf handle
2148 // truncation of the method name.
2149 class_name += s1len; // null string
2150 }
2151 else {
2152 // lop off the extra characters from the front of the class name
2153 class_name += ((s1len + s2len + 2) - maxLen);
2154 }
2155 }
2156
2157 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
2158 }
2159
2160 if (CICountOSR && is_osr) {
2161 _last_compile_type = osr_compile;
2162 } else {
2163 _last_compile_type = normal_compile;
2164 }
2165 _last_compile_level = comp_level;
2166
2167 if (UsePerfData) {
2168 CompilerCounters* counters = thread->counters();
2169 counters->set_current_method(current_method);
2170 counters->set_compile_type((jlong)_last_compile_type);
2171 }
2172 }
2173
2174
2175 // ------------------------------------------------------------------
2176 // CompileBroker::push_jni_handle_block
2177 //
2178 // Push on a new block of JNI handles.
2179 void CompileBroker::push_jni_handle_block() {
2180 JavaThread* thread = JavaThread::current();
2181
2182 // Allocate a new block for JNI handles.
2183 // Inlined code from jni_PushLocalFrame()
2184 JNIHandleBlock* java_handles = thread->active_handles();
2185 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
2186 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
2187 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
2188 thread->set_active_handles(compile_handles);
2189 }
2190
2191
2192 // ------------------------------------------------------------------
2193 // CompileBroker::pop_jni_handle_block
2194 //
2195 // Pop off the current block of JNI handles.
2196 void CompileBroker::pop_jni_handle_block() {
2197 JavaThread* thread = JavaThread::current();
2198
2199 // Release our JNI handle block
2200 JNIHandleBlock* compile_handles = thread->active_handles();
2201 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
2202 thread->set_active_handles(java_handles);
2203 compile_handles->set_pop_frame_link(NULL);
2204 JNIHandleBlock::release_block(compile_handles, thread); // may block
2205 }
2206
2207
2208 // ------------------------------------------------------------------
2209 // CompileBroker::check_break_at
2210 //
2211 // Should the compilation break at the current compilation.
2212 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
2213 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
2214 return true;
2215 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
2216 return true;
2217 } else {
2218 return (compile_id == CIBreakAt);
2219 }
2220 }
2221
2222 // ------------------------------------------------------------------
2223 // CompileBroker::collect_statistics
2224 //
2225 // Collect statistics about the compilation.
2226
2227 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
2228 bool success = task->is_success();
2229 methodHandle method (thread, task->method());
2230 uint compile_id = task->compile_id();
2231 bool is_osr = (task->osr_bci() != standard_entry_bci);
2232 nmethod* code = task->code();
2233 CompilerCounters* counters = thread->counters();
2234
2235 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
2236 MutexLocker locker(CompileStatistics_lock);
2237
2238 // _perf variables are production performance counters which are
2239 // updated regardless of the setting of the CITime and CITimeEach flags
2240 //
2241
2242 // account all time, including bailouts and failures in this counter;
2243 // C1 and C2 counters are counting both successful and unsuccessful compiles
2244 _t_total_compilation.add(time);
2245
2246 if (!success) {
2247 _total_bailout_count++;
2248 if (UsePerfData) {
2249 _perf_last_failed_method->set_value(counters->current_method());
2250 _perf_last_failed_type->set_value(counters->compile_type());
2251 _perf_total_bailout_count->inc();
2252 }
2253 _t_bailedout_compilation.add(time);
2254 } else if (code == NULL) {
2255 if (UsePerfData) {
2256 _perf_last_invalidated_method->set_value(counters->current_method());
2257 _perf_last_invalidated_type->set_value(counters->compile_type());
2258 _perf_total_invalidated_count->inc();
2259 }
2260 _total_invalidated_count++;
2261 _t_invalidated_compilation.add(time);
2262 } else {
2263 // Compilation succeeded
2264
2265 // update compilation ticks - used by the implementation of
2266 // java.lang.management.CompilationMBean
2267 _perf_total_compilation->inc(time.ticks());
2268 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time;
2269
2270 if (CITime) {
2271 if (is_osr) {
2272 _t_osr_compilation.add(time);
2273 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2274 } else {
2275 _t_standard_compilation.add(time);
2276 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
2277 }
2278 }
2279
2280 if (UsePerfData) {
2281 // save the name of the last method compiled
2282 _perf_last_method->set_value(counters->current_method());
2283 _perf_last_compile_type->set_value(counters->compile_type());
2284 _perf_last_compile_size->set_value(method->code_size() +
2285 task->num_inlined_bytecodes());
2286 if (is_osr) {
2287 _perf_osr_compilation->inc(time.ticks());
2288 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2289 } else {
2290 _perf_standard_compilation->inc(time.ticks());
2291 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
2292 }
2293 }
2294
2295 if (CITimeEach) {
2296 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
2297 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
2298 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
2299 }
2300
2301 // Collect counts of successful compilations
2302 _sum_nmethod_size += code->total_size();
2303 _sum_nmethod_code_size += code->insts_size();
2304 _total_compile_count++;
2305
2306 if (UsePerfData) {
2307 _perf_sum_nmethod_size->inc( code->total_size());
2308 _perf_sum_nmethod_code_size->inc(code->insts_size());
2309 _perf_total_compile_count->inc();
2310 }
2311
2312 if (is_osr) {
2313 if (UsePerfData) _perf_total_osr_compile_count->inc();
2314 _total_osr_compile_count++;
2315 } else {
2316 if (UsePerfData) _perf_total_standard_compile_count->inc();
2317 _total_standard_compile_count++;
2318 }
2319 }
2320 // set the current method for the thread to null
2321 if (UsePerfData) counters->set_current_method("");
2322 }
2323
2324 const char* CompileBroker::compiler_name(int comp_level) {
2325 AbstractCompiler *comp = CompileBroker::compiler(comp_level);
2326 if (comp == NULL) {
2327 return "no compiler";
2328 } else {
2329 return (comp->name());
2330 }
2331 }
2332
2333 void CompileBroker::print_times() {
2334 tty->cr();
2335 tty->print_cr("Accumulated compiler times");
2336 tty->print_cr("----------------------------------------------------------");
2337 //0000000000111111111122222222223333333333444444444455555555556666666666
2338 //0123456789012345678901234567890123456789012345678901234567890123456789
2339 tty->print_cr(" Total compilation time : %7.3f s", CompileBroker::_t_total_compilation.seconds());
2340 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s",
2341 CompileBroker::_t_standard_compilation.seconds(),
2342 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
2343 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s",
2344 CompileBroker::_t_bailedout_compilation.seconds(),
2345 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count);
2346 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s",
2347 CompileBroker::_t_osr_compilation.seconds(),
2348 CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count);
2349 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s",
2350 CompileBroker::_t_invalidated_compilation.seconds(),
2351 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count);
2352
2353 AbstractCompiler *comp = compiler(CompLevel_simple);
2354 if (comp != NULL) {
2355 tty->cr();
2356 comp->print_timers();
2357 }
2358 comp = compiler(CompLevel_full_optimization);
2359 if (comp != NULL) {
2360 tty->cr();
2361 comp->print_timers();
2362 }
2363 tty->cr();
2364 tty->print_cr(" Total compiled methods : %8d methods", CompileBroker::_total_compile_count);
2365 tty->print_cr(" Standard compilation : %8d methods", CompileBroker::_total_standard_compile_count);
2366 tty->print_cr(" On stack replacement : %8d methods", CompileBroker::_total_osr_compile_count);
2367 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
2368 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb);
2369 tty->print_cr(" Standard compilation : %8d bytes", CompileBroker::_sum_standard_bytes_compiled);
2370 tty->print_cr(" On stack replacement : %8d bytes", CompileBroker::_sum_osr_bytes_compiled);
2371 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
2372 tty->print_cr(" Average compilation speed : %8d bytes/s", bps);
2373 tty->cr();
2374 tty->print_cr(" nmethod code size : %8d bytes", CompileBroker::_sum_nmethod_code_size);
2375 tty->print_cr(" nmethod total size : %8d bytes", CompileBroker::_sum_nmethod_size);
2376 }
2377
2378 // Debugging output for failure
2379 void CompileBroker::print_last_compile() {
2380 if ( _last_compile_level != CompLevel_none &&
2381 compiler(_last_compile_level) != NULL &&
2382 _last_method_compiled != NULL &&
2383 _last_compile_type != no_compile) {
2384 if (_last_compile_type == osr_compile) {
2385 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
2386 _osr_compilation_id, _last_compile_level, _last_method_compiled);
2387 } else {
2388 tty->print_cr("Last parse: %d+++(%d) %s",
2389 _compilation_id, _last_compile_level, _last_method_compiled);
2390 }
2391 }
2392 }
2393
2394
2395 void CompileBroker::print_compiler_threads_on(outputStream* st) {
2396 #ifndef PRODUCT
2397 st->print_cr("Compiler thread printing unimplemented.");
2398 st->cr();
2399 #endif
2400 }