Wed, 25 Aug 2010 05:27:54 -0700
6978355: renaming for 6961697
Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never
1 /*
2 * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_compileBroker.cpp.incl"
28 #ifdef DTRACE_ENABLED
30 // Only bother with this argument setup if dtrace is available
32 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin,
33 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t);
34 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end,
35 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool);
37 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \
38 { \
39 char* comp_name = (char*)(compiler)->name(); \
40 symbolOop klass_name = (method)->klass_name(); \
41 symbolOop name = (method)->name(); \
42 symbolOop signature = (method)->signature(); \
43 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \
44 comp_name, strlen(comp_name), \
45 klass_name->bytes(), klass_name->utf8_length(), \
46 name->bytes(), name->utf8_length(), \
47 signature->bytes(), signature->utf8_length()); \
48 }
50 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \
51 { \
52 char* comp_name = (char*)(compiler)->name(); \
53 symbolOop klass_name = (method)->klass_name(); \
54 symbolOop name = (method)->name(); \
55 symbolOop signature = (method)->signature(); \
56 HS_DTRACE_PROBE9(hotspot, method__compile__end, \
57 comp_name, strlen(comp_name), \
58 klass_name->bytes(), klass_name->utf8_length(), \
59 name->bytes(), name->utf8_length(), \
60 signature->bytes(), signature->utf8_length(), (success)); \
61 }
63 #else // ndef DTRACE_ENABLED
65 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method)
66 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success)
68 #endif // ndef DTRACE_ENABLED
70 bool CompileBroker::_initialized = false;
71 volatile bool CompileBroker::_should_block = false;
72 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation;
74 // The installed compiler(s)
75 AbstractCompiler* CompileBroker::_compilers[2];
77 // These counters are used for assigning id's to each compilation
78 uint CompileBroker::_compilation_id = 0;
79 uint CompileBroker::_osr_compilation_id = 0;
81 // Debugging information
82 int CompileBroker::_last_compile_type = no_compile;
83 int CompileBroker::_last_compile_level = CompLevel_none;
84 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length];
86 // Performance counters
87 PerfCounter* CompileBroker::_perf_total_compilation = NULL;
88 PerfCounter* CompileBroker::_perf_osr_compilation = NULL;
89 PerfCounter* CompileBroker::_perf_standard_compilation = NULL;
91 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL;
92 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL;
93 PerfCounter* CompileBroker::_perf_total_compile_count = NULL;
94 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL;
95 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL;
97 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL;
98 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL;
99 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL;
100 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL;
102 PerfStringVariable* CompileBroker::_perf_last_method = NULL;
103 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL;
104 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL;
105 PerfVariable* CompileBroker::_perf_last_compile_type = NULL;
106 PerfVariable* CompileBroker::_perf_last_compile_size = NULL;
107 PerfVariable* CompileBroker::_perf_last_failed_type = NULL;
108 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL;
110 // Timers and counters for generating statistics
111 elapsedTimer CompileBroker::_t_total_compilation;
112 elapsedTimer CompileBroker::_t_osr_compilation;
113 elapsedTimer CompileBroker::_t_standard_compilation;
115 int CompileBroker::_total_bailout_count = 0;
116 int CompileBroker::_total_invalidated_count = 0;
117 int CompileBroker::_total_compile_count = 0;
118 int CompileBroker::_total_osr_compile_count = 0;
119 int CompileBroker::_total_standard_compile_count = 0;
121 int CompileBroker::_sum_osr_bytes_compiled = 0;
122 int CompileBroker::_sum_standard_bytes_compiled = 0;
123 int CompileBroker::_sum_nmethod_size = 0;
124 int CompileBroker::_sum_nmethod_code_size = 0;
126 CompileQueue* CompileBroker::_method_queue = NULL;
127 CompileTask* CompileBroker::_task_free_list = NULL;
129 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL;
131 // CompileTaskWrapper
132 //
133 // Assign this task to the current thread. Deallocate the task
134 // when the compilation is complete.
135 class CompileTaskWrapper : StackObj {
136 public:
137 CompileTaskWrapper(CompileTask* task);
138 ~CompileTaskWrapper();
139 };
141 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) {
142 CompilerThread* thread = CompilerThread::current();
143 thread->set_task(task);
144 CompileLog* log = thread->log();
145 if (log != NULL) task->log_task_start(log);
146 }
148 CompileTaskWrapper::~CompileTaskWrapper() {
149 CompilerThread* thread = CompilerThread::current();
150 CompileTask* task = thread->task();
151 CompileLog* log = thread->log();
152 if (log != NULL) task->log_task_done(log);
153 thread->set_task(NULL);
154 task->set_code_handle(NULL);
155 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress));
156 if (task->is_blocking()) {
157 MutexLocker notifier(task->lock(), thread);
158 task->mark_complete();
159 // Notify the waiting thread that the compilation has completed.
160 task->lock()->notify_all();
161 } else {
162 task->mark_complete();
164 // By convention, the compiling thread is responsible for
165 // recycling a non-blocking CompileTask.
166 CompileBroker::free_task(task);
167 }
168 }
171 // ------------------------------------------------------------------
172 // CompileTask::initialize
173 void CompileTask::initialize(int compile_id,
174 methodHandle method,
175 int osr_bci,
176 int comp_level,
177 methodHandle hot_method,
178 int hot_count,
179 const char* comment,
180 bool is_blocking) {
181 assert(!_lock->is_locked(), "bad locking");
183 _compile_id = compile_id;
184 _method = JNIHandles::make_global(method);
185 _osr_bci = osr_bci;
186 _is_blocking = is_blocking;
187 _comp_level = comp_level;
188 _num_inlined_bytecodes = 0;
190 _is_complete = false;
191 _is_success = false;
192 _code_handle = NULL;
194 _hot_method = NULL;
195 _hot_count = hot_count;
196 _time_queued = 0; // tidy
197 _comment = comment;
199 if (LogCompilation) {
200 _time_queued = os::elapsed_counter();
201 if (hot_method.not_null()) {
202 if (hot_method == method) {
203 _hot_method = _method;
204 } else {
205 _hot_method = JNIHandles::make_global(hot_method);
206 }
207 }
208 }
210 _next = NULL;
211 }
213 // ------------------------------------------------------------------
214 // CompileTask::code/set_code
215 nmethod* CompileTask::code() const {
216 if (_code_handle == NULL) return NULL;
217 return _code_handle->code();
218 }
219 void CompileTask::set_code(nmethod* nm) {
220 if (_code_handle == NULL && nm == NULL) return;
221 guarantee(_code_handle != NULL, "");
222 _code_handle->set_code(nm);
223 if (nm == NULL) _code_handle = NULL; // drop the handle also
224 }
226 // ------------------------------------------------------------------
227 // CompileTask::free
228 void CompileTask::free() {
229 set_code(NULL);
230 assert(!_lock->is_locked(), "Should not be locked when freed");
231 if (_hot_method != NULL && _hot_method != _method) {
232 JNIHandles::destroy_global(_hot_method);
233 }
234 JNIHandles::destroy_global(_method);
235 }
238 // ------------------------------------------------------------------
239 // CompileTask::print
240 void CompileTask::print() {
241 tty->print("<CompileTask compile_id=%d ", _compile_id);
242 tty->print("method=");
243 ((methodOop)JNIHandles::resolve(_method))->print_name(tty);
244 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>",
245 _osr_bci, bool_to_str(_is_blocking),
246 bool_to_str(_is_complete), bool_to_str(_is_success));
247 }
249 // ------------------------------------------------------------------
250 // CompileTask::print_line_on_error
251 //
252 // This function is called by fatal error handler when the thread
253 // causing troubles is a compiler thread.
254 //
255 // Do not grab any lock, do not allocate memory.
256 //
257 // Otherwise it's the same as CompileTask::print_line()
258 //
259 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) {
260 methodOop method = (methodOop)JNIHandles::resolve(_method);
262 // print compiler name
263 st->print("%s:", CompileBroker::compiler(comp_level())->name());
265 // print compilation number
266 st->print("%3d", compile_id());
268 // print method attributes
269 const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
270 { const char blocking_char = is_blocking() ? 'b' : ' ';
271 const char compile_type = is_osr ? '%' : ' ';
272 const char sync_char = method->is_synchronized() ? 's' : ' ';
273 const char exception_char = method->has_exception_handler() ? '!' : ' ';
274 const char tier_char =
275 is_highest_tier_compile(comp_level()) ? ' ' : ('0' + comp_level());
276 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
277 }
279 // Use buf to get method name and signature
280 if (method != NULL) st->print("%s", method->name_and_sig_as_C_string(buf, buflen));
282 // print osr_bci if any
283 if (is_osr) st->print(" @ %d", osr_bci());
285 // print method size
286 st->print_cr(" (%d bytes)", method->code_size());
287 }
289 // ------------------------------------------------------------------
290 // CompileTask::print_line
291 void CompileTask::print_line() {
292 Thread *thread = Thread::current();
293 methodHandle method(thread,
294 (methodOop)JNIHandles::resolve(method_handle()));
295 ResourceMark rm(thread);
297 ttyLocker ttyl; // keep the following output all in one block
299 // print compiler name if requested
300 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name());
302 // print compilation number
303 tty->print("%3d", compile_id());
305 // print method attributes
306 const bool is_osr = osr_bci() != CompileBroker::standard_entry_bci;
307 { const char blocking_char = is_blocking() ? 'b' : ' ';
308 const char compile_type = is_osr ? '%' : ' ';
309 const char sync_char = method->is_synchronized() ? 's' : ' ';
310 const char exception_char = method->has_exception_handler() ? '!' : ' ';
311 const char tier_char =
312 is_highest_tier_compile(comp_level()) ? ' ' : ('0' + comp_level());
313 tty->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, tier_char);
314 }
316 // print method name
317 method->print_short_name(tty);
319 // print osr_bci if any
320 if (is_osr) tty->print(" @ %d", osr_bci());
322 // print method size
323 tty->print_cr(" (%d bytes)", method->code_size());
324 }
327 // ------------------------------------------------------------------
328 // CompileTask::log_task
329 void CompileTask::log_task(xmlStream* log) {
330 Thread* thread = Thread::current();
331 methodHandle method(thread,
332 (methodOop)JNIHandles::resolve(method_handle()));
333 ResourceMark rm(thread);
335 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'>
336 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id);
337 if (_osr_bci != CompileBroker::standard_entry_bci) {
338 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind
339 } // else compile_kind='c2c'
340 if (!method.is_null()) log->method(method);
341 if (_osr_bci != CompileBroker::standard_entry_bci) {
342 log->print(" osr_bci='%d'", _osr_bci);
343 }
344 if (_comp_level != CompLevel_highest_tier) {
345 log->print(" level='%d'", _comp_level);
346 }
347 if (_is_blocking) {
348 log->print(" blocking='1'");
349 }
350 log->stamp();
351 }
354 // ------------------------------------------------------------------
355 // CompileTask::log_task_queued
356 void CompileTask::log_task_queued() {
357 Thread* thread = Thread::current();
358 ttyLocker ttyl;
359 ResourceMark rm(thread);
361 xtty->begin_elem("task_queued");
362 log_task(xtty);
363 if (_comment != NULL) {
364 xtty->print(" comment='%s'", _comment);
365 }
366 if (_hot_method != NULL) {
367 methodHandle hot(thread,
368 (methodOop)JNIHandles::resolve(_hot_method));
369 methodHandle method(thread,
370 (methodOop)JNIHandles::resolve(_method));
371 if (hot() != method()) {
372 xtty->method(hot);
373 }
374 }
375 if (_hot_count != 0) {
376 xtty->print(" hot_count='%d'", _hot_count);
377 }
378 xtty->end_elem();
379 }
382 // ------------------------------------------------------------------
383 // CompileTask::log_task_start
384 void CompileTask::log_task_start(CompileLog* log) {
385 log->begin_head("task");
386 log_task(log);
387 log->end_head();
388 }
391 // ------------------------------------------------------------------
392 // CompileTask::log_task_done
393 void CompileTask::log_task_done(CompileLog* log) {
394 Thread* thread = Thread::current();
395 methodHandle method(thread,
396 (methodOop)JNIHandles::resolve(method_handle()));
397 ResourceMark rm(thread);
399 // <task_done ... stamp='1.234'> </task>
400 nmethod* nm = code();
401 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'",
402 _is_success, nm == NULL ? 0 : nm->content_size(),
403 method->invocation_count());
404 int bec = method->backedge_count();
405 if (bec != 0) log->print(" backedge_count='%d'", bec);
406 // Note: "_is_complete" is about to be set, but is not.
407 if (_num_inlined_bytecodes != 0) {
408 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes);
409 }
410 log->stamp();
411 log->end_elem();
412 log->tail("task");
413 log->clear_identities(); // next task will have different CI
414 if (log->unflushed_count() > 2000) {
415 log->flush();
416 }
417 log->mark_file_end();
418 }
422 // ------------------------------------------------------------------
423 // CompileQueue::add
424 //
425 // Add a CompileTask to a CompileQueue
426 void CompileQueue::add(CompileTask* task) {
427 assert(lock()->owned_by_self(), "must own lock");
429 task->set_next(NULL);
431 if (_last == NULL) {
432 // The compile queue is empty.
433 assert(_first == NULL, "queue is empty");
434 _first = task;
435 _last = task;
436 } else {
437 // Append the task to the queue.
438 assert(_last->next() == NULL, "not last");
439 _last->set_next(task);
440 _last = task;
441 }
443 // Mark the method as being in the compile queue.
444 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation();
446 if (CIPrintCompileQueue) {
447 print();
448 }
450 if (LogCompilation && xtty != NULL) {
451 task->log_task_queued();
452 }
454 // Notify CompilerThreads that a task is available.
455 lock()->notify();
456 }
459 // ------------------------------------------------------------------
460 // CompileQueue::get
461 //
462 // Get the next CompileTask from a CompileQueue
463 CompileTask* CompileQueue::get() {
464 NMethodSweeper::possibly_sweep();
466 MutexLocker locker(lock());
468 // Wait for an available CompileTask.
469 while (_first == NULL) {
470 // There is no work to be done right now. Wait.
471 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) {
472 // During the emergency sweeping periods, wake up and sweep occasionally
473 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000);
474 if (timedout) {
475 MutexUnlocker ul(lock());
476 // When otherwise not busy, run nmethod sweeping
477 NMethodSweeper::possibly_sweep();
478 }
479 } else {
480 // During normal operation no need to wake up on timer
481 lock()->wait();
482 }
483 }
485 CompileTask* task = _first;
487 // Update queue first and last
488 _first =_first->next();
489 if (_first == NULL) {
490 _last = NULL;
491 }
493 return task;
495 }
498 // ------------------------------------------------------------------
499 // CompileQueue::print
500 void CompileQueue::print() {
501 tty->print_cr("Contents of %s", name());
502 tty->print_cr("----------------------");
503 CompileTask* task = _first;
504 while (task != NULL) {
505 task->print_line();
506 task = task->next();
507 }
508 tty->print_cr("----------------------");
509 }
511 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) {
513 _current_method[0] = '\0';
514 _compile_type = CompileBroker::no_compile;
516 if (UsePerfData) {
517 ResourceMark rm;
519 // create the thread instance name space string - don't create an
520 // instance subspace if instance is -1 - keeps the adapterThread
521 // counters from having a ".0" namespace.
522 const char* thread_i = (instance == -1) ? thread_name :
523 PerfDataManager::name_space(thread_name, instance);
526 char* name = PerfDataManager::counter_name(thread_i, "method");
527 _perf_current_method =
528 PerfDataManager::create_string_variable(SUN_CI, name,
529 cmname_buffer_length,
530 _current_method, CHECK);
532 name = PerfDataManager::counter_name(thread_i, "type");
533 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name,
534 PerfData::U_None,
535 (jlong)_compile_type,
536 CHECK);
538 name = PerfDataManager::counter_name(thread_i, "time");
539 _perf_time = PerfDataManager::create_counter(SUN_CI, name,
540 PerfData::U_Ticks, CHECK);
542 name = PerfDataManager::counter_name(thread_i, "compiles");
543 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name,
544 PerfData::U_Events, CHECK);
545 }
546 }
549 // ------------------------------------------------------------------
550 // CompileBroker::compilation_init
551 //
552 // Initialize the Compilation object
553 void CompileBroker::compilation_init() {
554 _last_method_compiled[0] = '\0';
556 // Set the interface to the current compiler(s).
557 #ifdef COMPILER1
558 _compilers[0] = new Compiler();
559 #ifndef COMPILER2
560 _compilers[1] = _compilers[0];
561 #endif
562 #endif // COMPILER1
564 #ifdef COMPILER2
565 _compilers[1] = new C2Compiler();
566 #ifndef COMPILER1
567 _compilers[0] = _compilers[1];
568 #endif
569 #endif // COMPILER2
571 #ifdef SHARK
572 #if defined(COMPILER1) || defined(COMPILER2)
573 #error "Can't use COMPILER1 or COMPILER2 with shark"
574 #endif
575 _compilers[0] = new SharkCompiler();
576 _compilers[1] = _compilers[0];
577 #endif
579 // Initialize the CompileTask free list
580 _task_free_list = NULL;
582 // Start the CompilerThreads
583 init_compiler_threads(compiler_count());
586 // totalTime performance counter is always created as it is required
587 // by the implementation of java.lang.management.CompilationMBean.
588 {
589 EXCEPTION_MARK;
590 _perf_total_compilation =
591 PerfDataManager::create_counter(JAVA_CI, "totalTime",
592 PerfData::U_Ticks, CHECK);
593 }
596 if (UsePerfData) {
598 EXCEPTION_MARK;
600 // create the jvmstat performance counters
601 _perf_osr_compilation =
602 PerfDataManager::create_counter(SUN_CI, "osrTime",
603 PerfData::U_Ticks, CHECK);
605 _perf_standard_compilation =
606 PerfDataManager::create_counter(SUN_CI, "standardTime",
607 PerfData::U_Ticks, CHECK);
609 _perf_total_bailout_count =
610 PerfDataManager::create_counter(SUN_CI, "totalBailouts",
611 PerfData::U_Events, CHECK);
613 _perf_total_invalidated_count =
614 PerfDataManager::create_counter(SUN_CI, "totalInvalidates",
615 PerfData::U_Events, CHECK);
617 _perf_total_compile_count =
618 PerfDataManager::create_counter(SUN_CI, "totalCompiles",
619 PerfData::U_Events, CHECK);
620 _perf_total_osr_compile_count =
621 PerfDataManager::create_counter(SUN_CI, "osrCompiles",
622 PerfData::U_Events, CHECK);
624 _perf_total_standard_compile_count =
625 PerfDataManager::create_counter(SUN_CI, "standardCompiles",
626 PerfData::U_Events, CHECK);
628 _perf_sum_osr_bytes_compiled =
629 PerfDataManager::create_counter(SUN_CI, "osrBytes",
630 PerfData::U_Bytes, CHECK);
632 _perf_sum_standard_bytes_compiled =
633 PerfDataManager::create_counter(SUN_CI, "standardBytes",
634 PerfData::U_Bytes, CHECK);
636 _perf_sum_nmethod_size =
637 PerfDataManager::create_counter(SUN_CI, "nmethodSize",
638 PerfData::U_Bytes, CHECK);
640 _perf_sum_nmethod_code_size =
641 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize",
642 PerfData::U_Bytes, CHECK);
644 _perf_last_method =
645 PerfDataManager::create_string_variable(SUN_CI, "lastMethod",
646 CompilerCounters::cmname_buffer_length,
647 "", CHECK);
649 _perf_last_failed_method =
650 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod",
651 CompilerCounters::cmname_buffer_length,
652 "", CHECK);
654 _perf_last_invalidated_method =
655 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod",
656 CompilerCounters::cmname_buffer_length,
657 "", CHECK);
659 _perf_last_compile_type =
660 PerfDataManager::create_variable(SUN_CI, "lastType",
661 PerfData::U_None,
662 (jlong)CompileBroker::no_compile,
663 CHECK);
665 _perf_last_compile_size =
666 PerfDataManager::create_variable(SUN_CI, "lastSize",
667 PerfData::U_Bytes,
668 (jlong)CompileBroker::no_compile,
669 CHECK);
672 _perf_last_failed_type =
673 PerfDataManager::create_variable(SUN_CI, "lastFailedType",
674 PerfData::U_None,
675 (jlong)CompileBroker::no_compile,
676 CHECK);
678 _perf_last_invalidated_type =
679 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType",
680 PerfData::U_None,
681 (jlong)CompileBroker::no_compile,
682 CHECK);
683 }
685 _initialized = true;
686 }
690 // ------------------------------------------------------------------
691 // CompileBroker::make_compiler_thread
692 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) {
693 CompilerThread* compiler_thread = NULL;
695 klassOop k =
696 SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(),
697 true, CHECK_0);
698 instanceKlassHandle klass (THREAD, k);
699 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0);
700 Handle string = java_lang_String::create_from_str(name, CHECK_0);
702 // Initialize thread_oop to put it into the system threadGroup
703 Handle thread_group (THREAD, Universe::system_thread_group());
704 JavaValue result(T_VOID);
705 JavaCalls::call_special(&result, thread_oop,
706 klass,
707 vmSymbolHandles::object_initializer_name(),
708 vmSymbolHandles::threadgroup_string_void_signature(),
709 thread_group,
710 string,
711 CHECK_0);
713 {
714 MutexLocker mu(Threads_lock, THREAD);
715 compiler_thread = new CompilerThread(queue, counters);
716 // At this point the new CompilerThread data-races with this startup
717 // thread (which I believe is the primoridal thread and NOT the VM
718 // thread). This means Java bytecodes being executed at startup can
719 // queue compile jobs which will run at whatever default priority the
720 // newly created CompilerThread runs at.
723 // At this point it may be possible that no osthread was created for the
724 // JavaThread due to lack of memory. We would have to throw an exception
725 // in that case. However, since this must work and we do not allow
726 // exceptions anyway, check and abort if this fails.
728 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){
729 vm_exit_during_initialization("java.lang.OutOfMemoryError",
730 "unable to create new native thread");
731 }
733 java_lang_Thread::set_thread(thread_oop(), compiler_thread);
735 // Note that this only sets the JavaThread _priority field, which by
736 // definition is limited to Java priorities and not OS priorities.
737 // The os-priority is set in the CompilerThread startup code itself
738 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority);
739 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler
740 // threads never have their OS priority set. The assumption here is to
741 // enable the Performance group to do flag tuning, figure out a suitable
742 // CompilerThreadPriority, and then remove this 'if' statement (and
743 // comment) and unconditionally set the priority.
745 // Compiler Threads should be at the highest Priority
746 if ( CompilerThreadPriority != -1 )
747 os::set_native_priority( compiler_thread, CompilerThreadPriority );
748 else
749 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]);
751 // Note that I cannot call os::set_priority because it expects Java
752 // priorities and I am *explicitly* using OS priorities so that it's
753 // possible to set the compiler thread priority higher than any Java
754 // thread.
756 java_lang_Thread::set_daemon(thread_oop());
758 compiler_thread->set_threadObj(thread_oop());
759 Threads::add(compiler_thread);
760 Thread::start(compiler_thread);
761 }
762 // Let go of Threads_lock before yielding
763 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS)
765 return compiler_thread;
766 }
769 // ------------------------------------------------------------------
770 // CompileBroker::init_compiler_threads
771 //
772 // Initialize the compilation queue
773 void CompileBroker::init_compiler_threads(int compiler_count) {
774 EXCEPTION_MARK;
776 _method_queue = new CompileQueue("MethodQueue", MethodCompileQueue_lock);
777 _method_threads =
778 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true);
780 char name_buffer[256];
781 int i;
782 for (i = 0; i < compiler_count; i++) {
783 // Create a name for our thread.
784 sprintf(name_buffer, "CompilerThread%d", i);
785 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK);
787 CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK);
788 _method_threads->append(new_thread);
789 }
790 if (UsePerfData) {
791 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes,
792 compiler_count, CHECK);
793 }
794 }
796 // ------------------------------------------------------------------
797 // CompileBroker::is_idle
798 bool CompileBroker::is_idle() {
799 if (!_method_queue->is_empty()) {
800 return false;
801 } else {
802 int num_threads = _method_threads->length();
803 for (int i=0; i<num_threads; i++) {
804 if (_method_threads->at(i)->task() != NULL) {
805 return false;
806 }
807 }
809 // No pending or active compilations.
810 return true;
811 }
812 }
815 // ------------------------------------------------------------------
816 // CompileBroker::compile_method
817 //
818 // Request compilation of a method.
819 void CompileBroker::compile_method_base(methodHandle method,
820 int osr_bci,
821 int comp_level,
822 methodHandle hot_method,
823 int hot_count,
824 const char* comment,
825 TRAPS) {
826 // do nothing if compiler thread(s) is not available
827 if (!_initialized ) {
828 return;
829 }
831 guarantee(!method->is_abstract(), "cannot compile abstract methods");
832 assert(method->method_holder()->klass_part()->oop_is_instance(),
833 "sanity check");
834 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(),
835 "method holder must be initialized");
837 if (CIPrintRequests) {
838 tty->print("request: ");
839 method->print_short_name(tty);
840 if (osr_bci != InvocationEntryBci) {
841 tty->print(" osr_bci: %d", osr_bci);
842 }
843 tty->print(" comment: %s count: %d", comment, hot_count);
844 if (!hot_method.is_null()) {
845 tty->print(" hot: ");
846 if (hot_method() != method()) {
847 hot_method->print_short_name(tty);
848 } else {
849 tty->print("yes");
850 }
851 }
852 tty->cr();
853 }
855 // A request has been made for compilation. Before we do any
856 // real work, check to see if the method has been compiled
857 // in the meantime with a definitive result.
858 if (compilation_is_complete(method, osr_bci, comp_level)) {
859 return;
860 }
862 // If this method is already in the compile queue, then
863 // we do not block the current thread.
864 if (compilation_is_in_queue(method, osr_bci)) {
865 // We may want to decay our counter a bit here to prevent
866 // multiple denied requests for compilation. This is an
867 // open compilation policy issue. Note: The other possibility,
868 // in the case that this is a blocking compile request, is to have
869 // all subsequent blocking requesters wait for completion of
870 // ongoing compiles. Note that in this case we'll need a protocol
871 // for freeing the associated compile tasks. [Or we could have
872 // a single static monitor on which all these waiters sleep.]
873 return;
874 }
876 // Outputs from the following MutexLocker block:
877 CompileTask* task = NULL;
878 bool blocking = false;
880 // Acquire our lock.
881 {
882 MutexLocker locker(_method_queue->lock(), THREAD);
884 // Make sure the method has not slipped into the queues since
885 // last we checked; note that those checks were "fast bail-outs".
886 // Here we need to be more careful, see 14012000 below.
887 if (compilation_is_in_queue(method, osr_bci)) {
888 return;
889 }
891 // We need to check again to see if the compilation has
892 // completed. A previous compilation may have registered
893 // some result.
894 if (compilation_is_complete(method, osr_bci, comp_level)) {
895 return;
896 }
898 // We now know that this compilation is not pending, complete,
899 // or prohibited. Assign a compile_id to this compilation
900 // and check to see if it is in our [Start..Stop) range.
901 uint compile_id = assign_compile_id(method, osr_bci);
902 if (compile_id == 0) {
903 // The compilation falls outside the allowed range.
904 return;
905 }
907 // Should this thread wait for completion of the compile?
908 blocking = is_compile_blocking(method, osr_bci);
910 // We will enter the compilation in the queue.
911 // 14012000: Note that this sets the queued_for_compile bits in
912 // the target method. We can now reason that a method cannot be
913 // queued for compilation more than once, as follows:
914 // Before a thread queues a task for compilation, it first acquires
915 // the compile queue lock, then checks if the method's queued bits
916 // are set or it has already been compiled. Thus there can not be two
917 // instances of a compilation task for the same method on the
918 // compilation queue. Consider now the case where the compilation
919 // thread has already removed a task for that method from the queue
920 // and is in the midst of compiling it. In this case, the
921 // queued_for_compile bits must be set in the method (and these
922 // will be visible to the current thread, since the bits were set
923 // under protection of the compile queue lock, which we hold now.
924 // When the compilation completes, the compiler thread first sets
925 // the compilation result and then clears the queued_for_compile
926 // bits. Neither of these actions are protected by a barrier (or done
927 // under the protection of a lock), so the only guarantee we have
928 // (on machines with TSO (Total Store Order)) is that these values
929 // will update in that order. As a result, the only combinations of
930 // these bits that the current thread will see are, in temporal order:
931 // <RESULT, QUEUE> :
932 // <0, 1> : in compile queue, but not yet compiled
933 // <1, 1> : compiled but queue bit not cleared
934 // <1, 0> : compiled and queue bit cleared
935 // Because we first check the queue bits then check the result bits,
936 // we are assured that we cannot introduce a duplicate task.
937 // Note that if we did the tests in the reverse order (i.e. check
938 // result then check queued bit), we could get the result bit before
939 // the compilation completed, and the queue bit after the compilation
940 // completed, and end up introducing a "duplicate" (redundant) task.
941 // In that case, the compiler thread should first check if a method
942 // has already been compiled before trying to compile it.
943 // NOTE: in the event that there are multiple compiler threads and
944 // there is de-optimization/recompilation, things will get hairy,
945 // and in that case it's best to protect both the testing (here) of
946 // these bits, and their updating (here and elsewhere) under a
947 // common lock.
948 task = create_compile_task(_method_queue,
949 compile_id, method,
950 osr_bci, comp_level,
951 hot_method, hot_count, comment,
952 blocking);
953 }
955 if (blocking) {
956 wait_for_completion(task);
957 }
958 }
961 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci,
962 methodHandle hot_method, int hot_count,
963 const char* comment, TRAPS) {
964 // make sure arguments make sense
965 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method");
966 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range");
967 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods");
968 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized");
970 int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci);
972 #ifdef TIERED
973 if (TieredCompilation && StressTieredRuntime) {
974 static int flipper = 0;
975 if (is_even(flipper++)) {
976 comp_level = CompLevel_fast_compile;
977 } else {
978 comp_level = CompLevel_full_optimization;
979 }
980 }
981 #ifdef SPARC
982 // QQQ FIX ME
983 // C2 only returns long results in G1 and c1 doesn't understand so disallow c2
984 // compiles of long results
985 if (TieredCompilation && method()->result_type() == T_LONG) {
986 comp_level = CompLevel_fast_compile;
987 }
988 #endif // SPARC
989 #endif // TIERED
991 // return quickly if possible
993 // lock, make sure that the compilation
994 // isn't prohibited in a straightforward way.
996 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) {
997 return NULL;
998 }
1000 if (osr_bci == InvocationEntryBci) {
1001 // standard compilation
1002 nmethod* method_code = method->code();
1003 if (method_code != NULL
1004 #ifdef TIERED
1005 && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile )
1006 #endif // TIERED
1007 ) {
1008 return method_code;
1009 }
1010 if (method->is_not_compilable(comp_level)) return NULL;
1012 if (UseCodeCacheFlushing) {
1013 nmethod* saved = CodeCache::find_and_remove_saved_code(method());
1014 if (saved != NULL) {
1015 method->set_code(method, saved);
1016 return saved;
1017 }
1018 }
1020 } else {
1021 // osr compilation
1022 #ifndef TIERED
1023 // seems like an assert of dubious value
1024 assert(comp_level == CompLevel_full_optimization,
1025 "all OSR compiles are assumed to be at a single compilation lavel");
1026 #endif // TIERED
1027 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci);
1028 if (nm != NULL) return nm;
1029 if (method->is_not_osr_compilable()) return NULL;
1030 }
1032 assert(!HAS_PENDING_EXCEPTION, "No exception should be present");
1033 // some prerequisites that are compiler specific
1034 if (compiler(comp_level)->is_c2()) {
1035 method->constants()->resolve_string_constants(CHECK_0);
1036 // Resolve all classes seen in the signature of the method
1037 // we are compiling.
1038 methodOopDesc::load_signature_classes(method, CHECK_0);
1039 }
1041 // If the method is native, do the lookup in the thread requesting
1042 // the compilation. Native lookups can load code, which is not
1043 // permitted during compilation.
1044 //
1045 // Note: A native method implies non-osr compilation which is
1046 // checked with an assertion at the entry of this method.
1047 if (method->is_native()) {
1048 bool in_base_library;
1049 address adr = NativeLookup::lookup(method, in_base_library, THREAD);
1050 if (HAS_PENDING_EXCEPTION) {
1051 // In case of an exception looking up the method, we just forget
1052 // about it. The interpreter will kick-in and throw the exception.
1053 method->set_not_compilable(); // implies is_not_osr_compilable()
1054 CLEAR_PENDING_EXCEPTION;
1055 return NULL;
1056 }
1057 assert(method->has_native_function(), "must have native code by now");
1058 }
1060 // RedefineClasses() has replaced this method; just return
1061 if (method->is_old()) {
1062 return NULL;
1063 }
1065 // JVMTI -- post_compile_event requires jmethod_id() that may require
1066 // a lock the compiling thread can not acquire. Prefetch it here.
1067 if (JvmtiExport::should_post_compiled_method_load()) {
1068 method->jmethod_id();
1069 }
1071 // If the compiler is shut off due to code cache flushing or otherwise,
1072 // fail out now so blocking compiles dont hang the java thread
1073 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) {
1074 method->invocation_counter()->decay();
1075 method->backedge_counter()->decay();
1076 return NULL;
1077 }
1079 // do the compilation
1080 if (method->is_native()) {
1081 if (!PreferInterpreterNativeStubs) {
1082 (void) AdapterHandlerLibrary::create_native_wrapper(method);
1083 } else {
1084 return NULL;
1085 }
1086 } else {
1087 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0);
1088 }
1090 // return requested nmethod
1091 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci);
1092 }
1095 // ------------------------------------------------------------------
1096 // CompileBroker::compilation_is_complete
1097 //
1098 // See if compilation of this method is already complete.
1099 bool CompileBroker::compilation_is_complete(methodHandle method,
1100 int osr_bci,
1101 int comp_level) {
1102 bool is_osr = (osr_bci != standard_entry_bci);
1103 if (is_osr) {
1104 if (method->is_not_osr_compilable()) {
1105 return true;
1106 } else {
1107 nmethod* result = method->lookup_osr_nmethod_for(osr_bci);
1108 return (result != NULL);
1109 }
1110 } else {
1111 if (method->is_not_compilable(comp_level)) {
1112 return true;
1113 } else {
1114 nmethod* result = method->code();
1115 if (result == NULL) return false;
1116 #ifdef TIERED
1117 if (comp_level == CompLevel_fast_compile) {
1118 // At worst the code is from c1
1119 return true;
1120 }
1121 // comp level must be full opt
1122 return result->is_compiled_by_c2();
1123 #endif // TIERED
1124 return true;
1125 }
1126 }
1127 }
1130 // ------------------------------------------------------------------
1131 // CompileBroker::compilation_is_in_queue
1132 //
1133 // See if this compilation is already requested.
1134 //
1135 // Implementation note: there is only a single "is in queue" bit
1136 // for each method. This means that the check below is overly
1137 // conservative in the sense that an osr compilation in the queue
1138 // will block a normal compilation from entering the queue (and vice
1139 // versa). This can be remedied by a full queue search to disambiguate
1140 // cases. If it is deemed profitible, this may be done.
1141 bool CompileBroker::compilation_is_in_queue(methodHandle method,
1142 int osr_bci) {
1143 return method->queued_for_compilation();
1144 }
1147 // ------------------------------------------------------------------
1148 // CompileBroker::compilation_is_prohibited
1149 //
1150 // See if this compilation is not allowed.
1151 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) {
1152 bool is_native = method->is_native();
1153 // Some compilers may not support the compilation of natives.
1154 // QQQ this needs some work ought to only record not compilable at
1155 // the specified level
1156 if (is_native &&
1157 (!CICompileNatives || !compiler(comp_level)->supports_native())) {
1158 method->set_not_compilable_quietly();
1159 return true;
1160 }
1162 bool is_osr = (osr_bci != standard_entry_bci);
1163 // Some compilers may not support on stack replacement.
1164 if (is_osr &&
1165 (!CICompileOSR || !compiler(comp_level)->supports_osr())) {
1166 method->set_not_osr_compilable();
1167 return true;
1168 }
1170 // The method may be explicitly excluded by the user.
1171 bool quietly;
1172 if (CompilerOracle::should_exclude(method, quietly)) {
1173 if (!quietly) {
1174 // This does not happen quietly...
1175 ResourceMark rm;
1176 tty->print("### Excluding %s:%s",
1177 method->is_native() ? "generation of native wrapper" : "compile",
1178 (method->is_static() ? " static" : ""));
1179 method->print_short_name(tty);
1180 tty->cr();
1181 }
1182 method->set_not_compilable_quietly();
1183 }
1185 return false;
1186 }
1189 // ------------------------------------------------------------------
1190 // CompileBroker::assign_compile_id
1191 //
1192 // Assign a serialized id number to this compilation request. If the
1193 // number falls out of the allowed range, return a 0. OSR
1194 // compilations may be numbered separately from regular compilations
1195 // if certain debugging flags are used.
1196 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) {
1197 assert(_method_queue->lock()->owner() == JavaThread::current(),
1198 "must hold the compilation queue lock");
1199 bool is_osr = (osr_bci != standard_entry_bci);
1200 assert(!method->is_native(), "no longer compile natives");
1201 uint id;
1202 if (CICountOSR && is_osr) {
1203 id = ++_osr_compilation_id;
1204 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) {
1205 return id;
1206 }
1207 } else {
1208 id = ++_compilation_id;
1209 if ((uint)CIStart <= id && id < (uint)CIStop) {
1210 return id;
1211 }
1212 }
1214 // Method was not in the appropriate compilation range.
1215 method->set_not_compilable_quietly();
1216 return 0;
1217 }
1220 // ------------------------------------------------------------------
1221 // CompileBroker::is_compile_blocking
1222 //
1223 // Should the current thread be blocked until this compilation request
1224 // has been fulfilled?
1225 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) {
1226 return !BackgroundCompilation;
1227 }
1230 // ------------------------------------------------------------------
1231 // CompileBroker::preload_classes
1232 void CompileBroker::preload_classes(methodHandle method, TRAPS) {
1233 // Move this code over from c1_Compiler.cpp
1234 ShouldNotReachHere();
1235 }
1238 // ------------------------------------------------------------------
1239 // CompileBroker::create_compile_task
1240 //
1241 // Create a CompileTask object representing the current request for
1242 // compilation. Add this task to the queue.
1243 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue,
1244 int compile_id,
1245 methodHandle method,
1246 int osr_bci,
1247 int comp_level,
1248 methodHandle hot_method,
1249 int hot_count,
1250 const char* comment,
1251 bool blocking) {
1252 CompileTask* new_task = allocate_task();
1253 new_task->initialize(compile_id, method, osr_bci, comp_level,
1254 hot_method, hot_count, comment,
1255 blocking);
1256 queue->add(new_task);
1257 return new_task;
1258 }
1261 // ------------------------------------------------------------------
1262 // CompileBroker::allocate_task
1263 //
1264 // Allocate a CompileTask, from the free list if possible.
1265 CompileTask* CompileBroker::allocate_task() {
1266 MutexLocker locker(CompileTaskAlloc_lock);
1267 CompileTask* task = NULL;
1268 if (_task_free_list != NULL) {
1269 task = _task_free_list;
1270 _task_free_list = task->next();
1271 task->set_next(NULL);
1272 } else {
1273 task = new CompileTask();
1274 task->set_next(NULL);
1275 }
1276 return task;
1277 }
1280 // ------------------------------------------------------------------
1281 // CompileBroker::free_task
1282 //
1283 // Add a task to the free list.
1284 void CompileBroker::free_task(CompileTask* task) {
1285 MutexLocker locker(CompileTaskAlloc_lock);
1286 task->free();
1287 task->set_next(_task_free_list);
1288 _task_free_list = task;
1289 }
1292 // ------------------------------------------------------------------
1293 // CompileBroker::wait_for_completion
1294 //
1295 // Wait for the given method CompileTask to complete.
1296 void CompileBroker::wait_for_completion(CompileTask* task) {
1297 if (CIPrintCompileQueue) {
1298 tty->print_cr("BLOCKING FOR COMPILE");
1299 }
1301 assert(task->is_blocking(), "can only wait on blocking task");
1303 JavaThread *thread = JavaThread::current();
1304 thread->set_blocked_on_compilation(true);
1306 methodHandle method(thread,
1307 (methodOop)JNIHandles::resolve(task->method_handle()));
1308 {
1309 MutexLocker waiter(task->lock(), thread);
1311 while (!task->is_complete())
1312 task->lock()->wait();
1313 }
1314 // It is harmless to check this status without the lock, because
1315 // completion is a stable property (until the task object is recycled).
1316 assert(task->is_complete(), "Compilation should have completed");
1317 assert(task->code_handle() == NULL, "must be reset");
1319 thread->set_blocked_on_compilation(false);
1321 // By convention, the waiter is responsible for recycling a
1322 // blocking CompileTask. Since there is only one waiter ever
1323 // waiting on a CompileTask, we know that no one else will
1324 // be using this CompileTask; we can free it.
1325 free_task(task);
1326 }
1328 // ------------------------------------------------------------------
1329 // CompileBroker::compiler_thread_loop
1330 //
1331 // The main loop run by a CompilerThread.
1332 void CompileBroker::compiler_thread_loop() {
1333 CompilerThread* thread = CompilerThread::current();
1334 CompileQueue* queue = thread->queue();
1336 // For the thread that initializes the ciObjectFactory
1337 // this resource mark holds all the shared objects
1338 ResourceMark rm;
1340 // First thread to get here will initialize the compiler interface
1342 if (!ciObjectFactory::is_initialized()) {
1343 ASSERT_IN_VM;
1344 MutexLocker only_one (CompileThread_lock, thread);
1345 if (!ciObjectFactory::is_initialized()) {
1346 ciObjectFactory::initialize();
1347 }
1348 }
1350 // Open a log.
1351 if (LogCompilation) {
1352 init_compiler_thread_log();
1353 }
1354 CompileLog* log = thread->log();
1355 if (log != NULL) {
1356 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'",
1357 os::current_thread_id(),
1358 os::current_process_id());
1359 log->stamp();
1360 log->end_elem();
1361 }
1363 while (true) {
1364 {
1365 // We need this HandleMark to avoid leaking VM handles.
1366 HandleMark hm(thread);
1368 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) {
1369 // the code cache is really full
1370 handle_full_code_cache();
1371 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) {
1372 // Attempt to start cleaning the code cache while there is still a little headroom
1373 NMethodSweeper::handle_full_code_cache(false);
1374 }
1376 CompileTask* task = queue->get();
1378 // Give compiler threads an extra quanta. They tend to be bursty and
1379 // this helps the compiler to finish up the job.
1380 if( CompilerThreadHintNoPreempt )
1381 os::hint_no_preempt();
1383 // trace per thread time and compile statistics
1384 CompilerCounters* counters = ((CompilerThread*)thread)->counters();
1385 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter());
1387 // Assign the task to the current thread. Mark this compilation
1388 // thread as active for the profiler.
1389 CompileTaskWrapper ctw(task);
1390 nmethodLocker result_handle; // (handle for the nmethod produced by this task)
1391 task->set_code_handle(&result_handle);
1392 methodHandle method(thread,
1393 (methodOop)JNIHandles::resolve(task->method_handle()));
1395 // Never compile a method if breakpoints are present in it
1396 if (method()->number_of_breakpoints() == 0) {
1397 // Compile the method.
1398 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) {
1399 #ifdef COMPILER1
1400 // Allow repeating compilations for the purpose of benchmarking
1401 // compile speed. This is not useful for customers.
1402 if (CompilationRepeat != 0) {
1403 int compile_count = CompilationRepeat;
1404 while (compile_count > 0) {
1405 invoke_compiler_on_method(task);
1406 nmethod* nm = method->code();
1407 if (nm != NULL) {
1408 nm->make_zombie();
1409 method->clear_code();
1410 }
1411 compile_count--;
1412 }
1413 }
1414 #endif /* COMPILER1 */
1415 invoke_compiler_on_method(task);
1416 } else {
1417 // After compilation is disabled, remove remaining methods from queue
1418 method->clear_queued_for_compilation();
1419 }
1420 }
1421 }
1422 }
1423 }
1426 // ------------------------------------------------------------------
1427 // CompileBroker::init_compiler_thread_log
1428 //
1429 // Set up state required by +LogCompilation.
1430 void CompileBroker::init_compiler_thread_log() {
1431 CompilerThread* thread = CompilerThread::current();
1432 char fileBuf[4*K];
1433 FILE* fp = NULL;
1434 char* file = NULL;
1435 intx thread_id = os::current_thread_id();
1436 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
1437 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
1438 if (dir == NULL) {
1439 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
1440 thread_id, os::current_process_id());
1441 } else {
1442 jio_snprintf(fileBuf, sizeof(fileBuf),
1443 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
1444 os::file_separator(), thread_id, os::current_process_id());
1445 }
1446 fp = fopen(fileBuf, "at");
1447 if (fp != NULL) {
1448 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);
1449 strcpy(file, fileBuf);
1450 break;
1451 }
1452 }
1453 if (fp == NULL) {
1454 warning("Cannot open log file: %s", fileBuf);
1455 } else {
1456 if (LogCompilation && Verbose)
1457 tty->print_cr("Opening compilation log %s", file);
1458 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id);
1459 thread->init_log(log);
1461 if (xtty != NULL) {
1462 ttyLocker ttyl;
1464 // Record any per thread log files
1465 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file);
1466 }
1467 }
1468 }
1470 // ------------------------------------------------------------------
1471 // CompileBroker::set_should_block
1472 //
1473 // Set _should_block.
1474 // Call this from the VM, with Threads_lock held and a safepoint requested.
1475 void CompileBroker::set_should_block() {
1476 assert(Threads_lock->owner() == Thread::current(), "must have threads lock");
1477 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already");
1478 #ifndef PRODUCT
1479 if (PrintCompilation && (Verbose || WizardMode))
1480 tty->print_cr("notifying compiler thread pool to block");
1481 #endif
1482 _should_block = true;
1483 }
1485 // ------------------------------------------------------------------
1486 // CompileBroker::maybe_block
1487 //
1488 // Call this from the compiler at convenient points, to poll for _should_block.
1489 void CompileBroker::maybe_block() {
1490 if (_should_block) {
1491 #ifndef PRODUCT
1492 if (PrintCompilation && (Verbose || WizardMode))
1493 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current());
1494 #endif
1495 ThreadInVMfromNative tivfn(JavaThread::current());
1496 }
1497 }
1500 // ------------------------------------------------------------------
1501 // CompileBroker::invoke_compiler_on_method
1502 //
1503 // Compile a method.
1504 //
1505 void CompileBroker::invoke_compiler_on_method(CompileTask* task) {
1506 if (PrintCompilation) {
1507 ResourceMark rm;
1508 task->print_line();
1509 }
1510 elapsedTimer time;
1512 CompilerThread* thread = CompilerThread::current();
1513 ResourceMark rm(thread);
1515 // Common flags.
1516 uint compile_id = task->compile_id();
1517 int osr_bci = task->osr_bci();
1518 bool is_osr = (osr_bci != standard_entry_bci);
1519 bool should_log = (thread->log() != NULL);
1520 bool should_break = false;
1521 {
1522 // create the handle inside it's own block so it can't
1523 // accidentally be referenced once the thread transitions to
1524 // native. The NoHandleMark before the transition should catch
1525 // any cases where this occurs in the future.
1526 methodHandle method(thread,
1527 (methodOop)JNIHandles::resolve(task->method_handle()));
1528 should_break = check_break_at(method, compile_id, is_osr);
1529 if (should_log && !CompilerOracle::should_log(method)) {
1530 should_log = false;
1531 }
1532 assert(!method->is_native(), "no longer compile natives");
1534 // Save information about this method in case of failure.
1535 set_last_compile(thread, method, is_osr, task->comp_level());
1537 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method);
1538 }
1540 // Allocate a new set of JNI handles.
1541 push_jni_handle_block();
1542 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle()));
1543 int compilable = ciEnv::MethodCompilable;
1544 {
1545 int system_dictionary_modification_counter;
1546 {
1547 MutexLocker locker(Compile_lock, thread);
1548 system_dictionary_modification_counter = SystemDictionary::number_of_modifications();
1549 }
1551 NoHandleMark nhm;
1552 ThreadToNativeFromVM ttn(thread);
1554 ciEnv ci_env(task, system_dictionary_modification_counter);
1555 if (should_break) {
1556 ci_env.set_break_at_compile(true);
1557 }
1558 if (should_log) {
1559 ci_env.set_log(thread->log());
1560 }
1561 assert(thread->env() == &ci_env, "set by ci_env");
1562 // The thread-env() field is cleared in ~CompileTaskWrapper.
1564 // Cache Jvmti state
1565 ci_env.cache_jvmti_state();
1567 // Cache DTrace flags
1568 ci_env.cache_dtrace_flags();
1570 ciMethod* target = ci_env.get_method_from_handle(target_handle);
1572 TraceTime t1("compilation", &time);
1574 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci);
1576 if (!ci_env.failing() && task->code() == NULL) {
1577 //assert(false, "compiler should always document failure");
1578 // The compiler elected, without comment, not to register a result.
1579 // Do not attempt further compilations of this method.
1580 ci_env.record_method_not_compilable("compile failed");
1581 }
1583 if (ci_env.failing()) {
1584 // Copy this bit to the enclosing block:
1585 compilable = ci_env.compilable();
1586 if (PrintCompilation) {
1587 const char* reason = ci_env.failure_reason();
1588 if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1589 if (is_highest_tier_compile(ci_env.comp_level())) {
1590 // Already at highest tier, promote to not compilable.
1591 compilable = ciEnv::MethodCompilable_never;
1592 } else {
1593 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason);
1594 }
1595 }
1597 if (compilable == ciEnv::MethodCompilable_never) {
1598 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason);
1599 } else if (compilable == ciEnv::MethodCompilable) {
1600 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason);
1601 }
1602 }
1603 } else {
1604 task->mark_success();
1605 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes());
1606 }
1607 }
1608 pop_jni_handle_block();
1610 methodHandle method(thread,
1611 (methodOop)JNIHandles::resolve(task->method_handle()));
1613 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success());
1615 collect_statistics(thread, time, task);
1617 if (compilable == ciEnv::MethodCompilable_never) {
1618 if (is_osr) {
1619 method->set_not_osr_compilable();
1620 } else {
1621 method->set_not_compilable_quietly();
1622 }
1623 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) {
1624 method->set_not_compilable_quietly(task->comp_level());
1625 }
1627 // Note that the queued_for_compilation bits are cleared without
1628 // protection of a mutex. [They were set by the requester thread,
1629 // when adding the task to the complie queue -- at which time the
1630 // compile queue lock was held. Subsequently, we acquired the compile
1631 // queue lock to get this task off the compile queue; thus (to belabour
1632 // the point somewhat) our clearing of the bits must be occurring
1633 // only after the setting of the bits. See also 14012000 above.
1634 method->clear_queued_for_compilation();
1636 #ifdef ASSERT
1637 if (CollectedHeap::fired_fake_oom()) {
1638 // The current compile received a fake OOM during compilation so
1639 // go ahead and exit the VM since the test apparently succeeded
1640 tty->print_cr("*** Shutting down VM after successful fake OOM");
1641 vm_exit(0);
1642 }
1643 #endif
1644 }
1647 // ------------------------------------------------------------------
1648 // CompileBroker::handle_full_code_cache
1649 //
1650 // The CodeCache is full. Print out warning and disable compilation or
1651 // try code cache cleaning so compilation can continue later.
1652 void CompileBroker::handle_full_code_cache() {
1653 UseInterpreter = true;
1654 if (UseCompiler || AlwaysCompileLoopMethods ) {
1655 if (xtty != NULL) {
1656 xtty->begin_elem("code_cache_full");
1657 xtty->stamp();
1658 xtty->end_elem();
1659 }
1660 warning("CodeCache is full. Compiler has been disabled.");
1661 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize=");
1662 #ifndef PRODUCT
1663 if (CompileTheWorld || ExitOnFullCodeCache) {
1664 before_exit(JavaThread::current());
1665 exit_globals(); // will delete tty
1666 vm_direct_exit(CompileTheWorld ? 0 : 1);
1667 }
1668 #endif
1669 if (UseCodeCacheFlushing) {
1670 NMethodSweeper::handle_full_code_cache(true);
1671 } else {
1672 UseCompiler = false;
1673 AlwaysCompileLoopMethods = false;
1674 }
1675 }
1676 }
1678 // ------------------------------------------------------------------
1679 // CompileBroker::set_last_compile
1680 //
1681 // Record this compilation for debugging purposes.
1682 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) {
1683 ResourceMark rm;
1684 char* method_name = method->name()->as_C_string();
1685 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length);
1686 char current_method[CompilerCounters::cmname_buffer_length];
1687 size_t maxLen = CompilerCounters::cmname_buffer_length;
1689 if (UsePerfData) {
1690 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string();
1692 size_t s1len = strlen(class_name);
1693 size_t s2len = strlen(method_name);
1695 // check if we need to truncate the string
1696 if (s1len + s2len + 2 > maxLen) {
1698 // the strategy is to lop off the leading characters of the
1699 // class name and the trailing characters of the method name.
1701 if (s2len + 2 > maxLen) {
1702 // lop of the entire class name string, let snprintf handle
1703 // truncation of the method name.
1704 class_name += s1len; // null string
1705 }
1706 else {
1707 // lop off the extra characters from the front of the class name
1708 class_name += ((s1len + s2len + 2) - maxLen);
1709 }
1710 }
1712 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name);
1713 }
1715 if (CICountOSR && is_osr) {
1716 _last_compile_type = osr_compile;
1717 } else {
1718 _last_compile_type = normal_compile;
1719 }
1720 _last_compile_level = comp_level;
1722 if (UsePerfData) {
1723 CompilerCounters* counters = thread->counters();
1724 counters->set_current_method(current_method);
1725 counters->set_compile_type((jlong)_last_compile_type);
1726 }
1727 }
1730 // ------------------------------------------------------------------
1731 // CompileBroker::push_jni_handle_block
1732 //
1733 // Push on a new block of JNI handles.
1734 void CompileBroker::push_jni_handle_block() {
1735 JavaThread* thread = JavaThread::current();
1737 // Allocate a new block for JNI handles.
1738 // Inlined code from jni_PushLocalFrame()
1739 JNIHandleBlock* java_handles = thread->active_handles();
1740 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread);
1741 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL");
1742 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd.
1743 thread->set_active_handles(compile_handles);
1744 }
1747 // ------------------------------------------------------------------
1748 // CompileBroker::pop_jni_handle_block
1749 //
1750 // Pop off the current block of JNI handles.
1751 void CompileBroker::pop_jni_handle_block() {
1752 JavaThread* thread = JavaThread::current();
1754 // Release our JNI handle block
1755 JNIHandleBlock* compile_handles = thread->active_handles();
1756 JNIHandleBlock* java_handles = compile_handles->pop_frame_link();
1757 thread->set_active_handles(java_handles);
1758 compile_handles->set_pop_frame_link(NULL);
1759 JNIHandleBlock::release_block(compile_handles, thread); // may block
1760 }
1763 // ------------------------------------------------------------------
1764 // CompileBroker::check_break_at
1765 //
1766 // Should the compilation break at the current compilation.
1767 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) {
1768 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) {
1769 return true;
1770 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling
1771 return true;
1772 } else {
1773 return (compile_id == CIBreakAt);
1774 }
1775 }
1777 // ------------------------------------------------------------------
1778 // CompileBroker::collect_statistics
1779 //
1780 // Collect statistics about the compilation.
1782 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) {
1783 bool success = task->is_success();
1784 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle()));
1785 uint compile_id = task->compile_id();
1786 bool is_osr = (task->osr_bci() != standard_entry_bci);
1787 nmethod* code = task->code();
1788 CompilerCounters* counters = thread->counters();
1790 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker");
1791 MutexLocker locker(CompileStatistics_lock);
1793 // _perf variables are production performance counters which are
1794 // updated regardless of the setting of the CITime and CITimeEach flags
1795 //
1796 if (!success) {
1797 _total_bailout_count++;
1798 if (UsePerfData) {
1799 _perf_last_failed_method->set_value(counters->current_method());
1800 _perf_last_failed_type->set_value(counters->compile_type());
1801 _perf_total_bailout_count->inc();
1802 }
1803 } else if (code == NULL) {
1804 if (UsePerfData) {
1805 _perf_last_invalidated_method->set_value(counters->current_method());
1806 _perf_last_invalidated_type->set_value(counters->compile_type());
1807 _perf_total_invalidated_count->inc();
1808 }
1809 _total_invalidated_count++;
1810 } else {
1811 // Compilation succeeded
1813 // update compilation ticks - used by the implementation of
1814 // java.lang.management.CompilationMBean
1815 _perf_total_compilation->inc(time.ticks());
1817 if (CITime) {
1818 _t_total_compilation.add(time);
1819 if (is_osr) {
1820 _t_osr_compilation.add(time);
1821 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1822 } else {
1823 _t_standard_compilation.add(time);
1824 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes();
1825 }
1826 }
1828 if (UsePerfData) {
1829 // save the name of the last method compiled
1830 _perf_last_method->set_value(counters->current_method());
1831 _perf_last_compile_type->set_value(counters->compile_type());
1832 _perf_last_compile_size->set_value(method->code_size() +
1833 task->num_inlined_bytecodes());
1834 if (is_osr) {
1835 _perf_osr_compilation->inc(time.ticks());
1836 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1837 } else {
1838 _perf_standard_compilation->inc(time.ticks());
1839 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes());
1840 }
1841 }
1843 if (CITimeEach) {
1844 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds();
1845 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)",
1846 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes());
1847 }
1849 // Collect counts of successful compilations
1850 _sum_nmethod_size += code->total_size();
1851 _sum_nmethod_code_size += code->insts_size();
1852 _total_compile_count++;
1854 if (UsePerfData) {
1855 _perf_sum_nmethod_size->inc( code->total_size());
1856 _perf_sum_nmethod_code_size->inc(code->insts_size());
1857 _perf_total_compile_count->inc();
1858 }
1860 if (is_osr) {
1861 if (UsePerfData) _perf_total_osr_compile_count->inc();
1862 _total_osr_compile_count++;
1863 } else {
1864 if (UsePerfData) _perf_total_standard_compile_count->inc();
1865 _total_standard_compile_count++;
1866 }
1867 }
1868 // set the current method for the thread to null
1869 if (UsePerfData) counters->set_current_method("");
1870 }
1874 void CompileBroker::print_times() {
1875 tty->cr();
1876 tty->print_cr("Accumulated compiler times (for compiled methods only)");
1877 tty->print_cr("------------------------------------------------");
1878 //0000000000111111111122222222223333333333444444444455555555556666666666
1879 //0123456789012345678901234567890123456789012345678901234567890123456789
1880 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds());
1881 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f",
1882 CompileBroker::_t_standard_compilation.seconds(),
1883 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count);
1884 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);
1886 if (compiler(CompLevel_fast_compile)) {
1887 compiler(CompLevel_fast_compile)->print_timers();
1888 if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier))
1889 compiler(CompLevel_highest_tier)->print_timers();
1890 }
1892 tty->cr();
1893 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled;
1894 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb);
1895 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled);
1896 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled);
1897 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds());
1898 tty->print_cr(" Average compilation speed: %6d bytes/s", bps);
1899 tty->cr();
1900 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size);
1901 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size);
1902 }
1905 // Debugging output for failure
1906 void CompileBroker::print_last_compile() {
1907 if ( _last_compile_level != CompLevel_none &&
1908 compiler(_last_compile_level) != NULL &&
1909 _last_method_compiled != NULL &&
1910 _last_compile_type != no_compile) {
1911 if (_last_compile_type == osr_compile) {
1912 tty->print_cr("Last parse: [osr]%d+++(%d) %s",
1913 _osr_compilation_id, _last_compile_level, _last_method_compiled);
1914 } else {
1915 tty->print_cr("Last parse: %d+++(%d) %s",
1916 _compilation_id, _last_compile_level, _last_method_compiled);
1917 }
1918 }
1919 }
1922 void CompileBroker::print_compiler_threads_on(outputStream* st) {
1923 #ifndef PRODUCT
1924 st->print_cr("Compiler thread printing unimplemented.");
1925 st->cr();
1926 #endif
1927 }