1 /* 2 * Copyright 1999-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25 #include "incls/_precompiled.incl" 26 #include "incls/_compileBroker.cpp.incl" 27 28 #ifdef DTRACE_ENABLED 29 30 // Only bother with this argument setup if dtrace is available 31 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); 36 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 } 49 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 } 62 63 #else // ndef DTRACE_ENABLED 64 65 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) 66 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) 67 68 #endif // ndef DTRACE_ENABLED 69 70 bool CompileBroker::_initialized = false; 71 volatile bool CompileBroker::_should_block = false; 72 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 73 74 // The installed compiler(s) 75 AbstractCompiler* CompileBroker::_compilers[2]; 76 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; 80 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]; 85 86 // Performance counters 87 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 88 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 89 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 90 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; 96 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; 101 102 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; 109 110 // Timers and counters for generating statistics 111 elapsedTimer CompileBroker::_t_total_compilation; 112 elapsedTimer CompileBroker::_t_osr_compilation; 113 elapsedTimer CompileBroker::_t_standard_compilation; 114 115 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; 120 121 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; 125 126 CompileQueue* CompileBroker::_method_queue = NULL; 127 CompileTask* CompileBroker::_task_free_list = NULL; 128 129 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; 130 131 // 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 }; 140 141 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 } 147 148 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(); 163 164 // By convention, the compiling thread is responsible for 165 // recycling a non-blocking CompileTask. 166 CompileBroker::free_task(task); 167 } 168 } 169 170 171 // ------------------------------------------------------------------ 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"); 182 183 _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; 189 190 _is_complete = false; 191 _is_success = false; 192 _code_handle = NULL; 193 194 _hot_method = NULL; 195 _hot_count = hot_count; 196 _time_queued = 0; // tidy 197 _comment = comment; 198 199 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 } 209 210 _next = NULL; 211 } 212 213 // ------------------------------------------------------------------ 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 } 225 226 // ------------------------------------------------------------------ 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 } 236 237 238 // ------------------------------------------------------------------ 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 } 248 249 // ------------------------------------------------------------------ 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); 261 262 // print compiler name 263 st->print("%s:", CompileBroker::compiler(comp_level())->name()); 264 265 // print compilation number 266 st->print("%3d", compile_id()); 267 268 // 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 } 278 279 // Use buf to get method name and signature 280 if (method != NULL) st->print("%s", method->name_and_sig_as_C_string(buf, buflen)); 281 282 // print osr_bci if any 283 if (is_osr) st->print(" @ %d", osr_bci()); 284 285 // print method size 286 st->print_cr(" (%d bytes)", method->code_size()); 287 } 288 289 // ------------------------------------------------------------------ 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); 296 297 ttyLocker ttyl; // keep the following output all in one block 298 299 // print compiler name if requested 300 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); 301 302 // print compilation number 303 tty->print("%3d", compile_id()); 304 305 // 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 } 315 316 // print method name 317 method->print_short_name(tty); 318 319 // print osr_bci if any 320 if (is_osr) tty->print(" @ %d", osr_bci()); 321 322 // print method size 323 tty->print_cr(" (%d bytes)", method->code_size()); 324 } 325 326 327 // ------------------------------------------------------------------ 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); 334 335 // <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 } 352 353 354 // ------------------------------------------------------------------ 355 // CompileTask::log_task_queued 356 void CompileTask::log_task_queued() { 357 Thread* thread = Thread::current(); 358 ttyLocker ttyl; 359 ResourceMark rm(thread); 360 361 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 } 380 381 382 // ------------------------------------------------------------------ 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 } 389 390 391 // ------------------------------------------------------------------ 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); 398 399 // <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->instructions_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 } 419 420 421 422 // ------------------------------------------------------------------ 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"); 428 429 task->set_next(NULL); 430 431 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 } 442 443 // Mark the method as being in the compile queue. 444 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); 445 446 if (CIPrintCompileQueue) { 447 print(); 448 } 449 450 if (LogCompilation && xtty != NULL) { 451 task->log_task_queued(); 452 } 453 454 // Notify CompilerThreads that a task is available. 455 lock()->notify(); 456 } 457 458 459 // ------------------------------------------------------------------ 460 // CompileQueue::get 461 // 462 // Get the next CompileTask from a CompileQueue 463 CompileTask* CompileQueue::get() { 464 MutexLocker locker(lock()); 465 466 // Wait for an available CompileTask. 467 while ((_first == NULL) || (!CompileBroker::should_compile_new_jobs())) { 468 // There is no work to be done right now. Wait. 469 lock()->wait(); 470 } 471 472 CompileTask* task = _first; 473 474 // Update queue first and last 475 _first =_first->next(); 476 if (_first == NULL) { 477 _last = NULL; 478 } 479 480 return task; 481 482 } 483 484 485 // ------------------------------------------------------------------ 486 // CompileQueue::print 487 void CompileQueue::print() { 488 tty->print_cr("Contents of %s", name()); 489 tty->print_cr("----------------------"); 490 CompileTask* task = _first; 491 while (task != NULL) { 492 task->print_line(); 493 task = task->next(); 494 } 495 tty->print_cr("----------------------"); 496 } 497 498 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { 499 500 _current_method[0] = '\0'; 501 _compile_type = CompileBroker::no_compile; 502 503 if (UsePerfData) { 504 ResourceMark rm; 505 506 // create the thread instance name space string - don't create an 507 // instance subspace if instance is -1 - keeps the adapterThread 508 // counters from having a ".0" namespace. 509 const char* thread_i = (instance == -1) ? thread_name : 510 PerfDataManager::name_space(thread_name, instance); 511 512 513 char* name = PerfDataManager::counter_name(thread_i, "method"); 514 _perf_current_method = 515 PerfDataManager::create_string_variable(SUN_CI, name, 516 cmname_buffer_length, 517 _current_method, CHECK); 518 519 name = PerfDataManager::counter_name(thread_i, "type"); 520 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, 521 PerfData::U_None, 522 (jlong)_compile_type, 523 CHECK); 524 525 name = PerfDataManager::counter_name(thread_i, "time"); 526 _perf_time = PerfDataManager::create_counter(SUN_CI, name, 527 PerfData::U_Ticks, CHECK); 528 529 name = PerfDataManager::counter_name(thread_i, "compiles"); 530 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, 531 PerfData::U_Events, CHECK); 532 } 533 } 534 535 536 // ------------------------------------------------------------------ 537 // CompileBroker::compilation_init 538 // 539 // Initialize the Compilation object 540 void CompileBroker::compilation_init() { 541 _last_method_compiled[0] = '\0'; 542 543 // Set the interface to the current compiler(s). 544 #ifdef COMPILER1 545 _compilers[0] = new Compiler(); 546 #ifndef COMPILER2 547 _compilers[1] = _compilers[0]; 548 #endif 549 #endif // COMPILER1 550 551 #ifdef COMPILER2 552 _compilers[1] = new C2Compiler(); 553 #ifndef COMPILER1 554 _compilers[0] = _compilers[1]; 555 #endif 556 #endif // COMPILER2 557 558 // Initialize the CompileTask free list 559 _task_free_list = NULL; 560 561 // Start the CompilerThreads 562 init_compiler_threads(compiler_count()); 563 564 565 // totalTime performance counter is always created as it is required 566 // by the implementation of java.lang.management.CompilationMBean. 567 { 568 EXCEPTION_MARK; 569 _perf_total_compilation = 570 PerfDataManager::create_counter(JAVA_CI, "totalTime", 571 PerfData::U_Ticks, CHECK); 572 } 573 574 575 if (UsePerfData) { 576 577 EXCEPTION_MARK; 578 579 // create the jvmstat performance counters 580 _perf_osr_compilation = 581 PerfDataManager::create_counter(SUN_CI, "osrTime", 582 PerfData::U_Ticks, CHECK); 583 584 _perf_standard_compilation = 585 PerfDataManager::create_counter(SUN_CI, "standardTime", 586 PerfData::U_Ticks, CHECK); 587 588 _perf_total_bailout_count = 589 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 590 PerfData::U_Events, CHECK); 591 592 _perf_total_invalidated_count = 593 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 594 PerfData::U_Events, CHECK); 595 596 _perf_total_compile_count = 597 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 598 PerfData::U_Events, CHECK); 599 _perf_total_osr_compile_count = 600 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 601 PerfData::U_Events, CHECK); 602 603 _perf_total_standard_compile_count = 604 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 605 PerfData::U_Events, CHECK); 606 607 _perf_sum_osr_bytes_compiled = 608 PerfDataManager::create_counter(SUN_CI, "osrBytes", 609 PerfData::U_Bytes, CHECK); 610 611 _perf_sum_standard_bytes_compiled = 612 PerfDataManager::create_counter(SUN_CI, "standardBytes", 613 PerfData::U_Bytes, CHECK); 614 615 _perf_sum_nmethod_size = 616 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 617 PerfData::U_Bytes, CHECK); 618 619 _perf_sum_nmethod_code_size = 620 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 621 PerfData::U_Bytes, CHECK); 622 623 _perf_last_method = 624 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 625 CompilerCounters::cmname_buffer_length, 626 "", CHECK); 627 628 _perf_last_failed_method = 629 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 630 CompilerCounters::cmname_buffer_length, 631 "", CHECK); 632 633 _perf_last_invalidated_method = 634 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 635 CompilerCounters::cmname_buffer_length, 636 "", CHECK); 637 638 _perf_last_compile_type = 639 PerfDataManager::create_variable(SUN_CI, "lastType", 640 PerfData::U_None, 641 (jlong)CompileBroker::no_compile, 642 CHECK); 643 644 _perf_last_compile_size = 645 PerfDataManager::create_variable(SUN_CI, "lastSize", 646 PerfData::U_Bytes, 647 (jlong)CompileBroker::no_compile, 648 CHECK); 649 650 651 _perf_last_failed_type = 652 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 653 PerfData::U_None, 654 (jlong)CompileBroker::no_compile, 655 CHECK); 656 657 _perf_last_invalidated_type = 658 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 659 PerfData::U_None, 660 (jlong)CompileBroker::no_compile, 661 CHECK); 662 } 663 664 _initialized = true; 665 } 666 667 668 669 // ------------------------------------------------------------------ 670 // CompileBroker::make_compiler_thread 671 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { 672 CompilerThread* compiler_thread = NULL; 673 674 klassOop k = 675 SystemDictionary::resolve_or_fail(vmSymbolHandles::java_lang_Thread(), 676 true, CHECK_0); 677 instanceKlassHandle klass (THREAD, k); 678 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 679 Handle string = java_lang_String::create_from_str(name, CHECK_0); 680 681 // Initialize thread_oop to put it into the system threadGroup 682 Handle thread_group (THREAD, Universe::system_thread_group()); 683 JavaValue result(T_VOID); 684 JavaCalls::call_special(&result, thread_oop, 685 klass, 686 vmSymbolHandles::object_initializer_name(), 687 vmSymbolHandles::threadgroup_string_void_signature(), 688 thread_group, 689 string, 690 CHECK_0); 691 692 { 693 MutexLocker mu(Threads_lock, THREAD); 694 compiler_thread = new CompilerThread(queue, counters); 695 // At this point the new CompilerThread data-races with this startup 696 // thread (which I believe is the primoridal thread and NOT the VM 697 // thread). This means Java bytecodes being executed at startup can 698 // queue compile jobs which will run at whatever default priority the 699 // newly created CompilerThread runs at. 700 701 702 // At this point it may be possible that no osthread was created for the 703 // JavaThread due to lack of memory. We would have to throw an exception 704 // in that case. However, since this must work and we do not allow 705 // exceptions anyway, check and abort if this fails. 706 707 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ 708 vm_exit_during_initialization("java.lang.OutOfMemoryError", 709 "unable to create new native thread"); 710 } 711 712 java_lang_Thread::set_thread(thread_oop(), compiler_thread); 713 714 // Note that this only sets the JavaThread _priority field, which by 715 // definition is limited to Java priorities and not OS priorities. 716 // The os-priority is set in the CompilerThread startup code itself 717 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 718 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler 719 // threads never have their OS priority set. The assumption here is to 720 // enable the Performance group to do flag tuning, figure out a suitable 721 // CompilerThreadPriority, and then remove this 'if' statement (and 722 // comment) and unconditionally set the priority. 723 724 // Compiler Threads should be at the highest Priority 725 if ( CompilerThreadPriority != -1 ) 726 os::set_native_priority( compiler_thread, CompilerThreadPriority ); 727 else 728 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); 729 730 // Note that I cannot call os::set_priority because it expects Java 731 // priorities and I am *explicitly* using OS priorities so that it's 732 // possible to set the compiler thread priority higher than any Java 733 // thread. 734 735 java_lang_Thread::set_daemon(thread_oop()); 736 737 compiler_thread->set_threadObj(thread_oop()); 738 Threads::add(compiler_thread); 739 Thread::start(compiler_thread); 740 } 741 // Let go of Threads_lock before yielding 742 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 743 744 return compiler_thread; 745 } 746 747 748 // ------------------------------------------------------------------ 749 // CompileBroker::init_compiler_threads 750 // 751 // Initialize the compilation queue 752 void CompileBroker::init_compiler_threads(int compiler_count) { 753 EXCEPTION_MARK; 754 755 _method_queue = new CompileQueue("MethodQueue", MethodCompileQueue_lock); 756 _method_threads = 757 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); 758 759 char name_buffer[256]; 760 int i; 761 for (i = 0; i < compiler_count; i++) { 762 // Create a name for our thread. 763 sprintf(name_buffer, "CompilerThread%d", i); 764 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 765 766 CompilerThread* new_thread = make_compiler_thread(name_buffer, _method_queue, counters, CHECK); 767 _method_threads->append(new_thread); 768 } 769 if (UsePerfData) { 770 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, 771 compiler_count, CHECK); 772 } 773 } 774 775 // ------------------------------------------------------------------ 776 // CompileBroker::is_idle 777 bool CompileBroker::is_idle() { 778 if (!_method_queue->is_empty()) { 779 return false; 780 } else { 781 int num_threads = _method_threads->length(); 782 for (int i=0; i<num_threads; i++) { 783 if (_method_threads->at(i)->task() != NULL) { 784 return false; 785 } 786 } 787 788 // No pending or active compilations. 789 return true; 790 } 791 } 792 793 794 // ------------------------------------------------------------------ 795 // CompileBroker::compile_method 796 // 797 // Request compilation of a method. 798 void CompileBroker::compile_method_base(methodHandle method, 799 int osr_bci, 800 int comp_level, 801 methodHandle hot_method, 802 int hot_count, 803 const char* comment, 804 TRAPS) { 805 // do nothing if compiler thread(s) is not available 806 if (!_initialized ) { 807 return; 808 } 809 810 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 811 assert(method->method_holder()->klass_part()->oop_is_instance(), 812 "sanity check"); 813 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), 814 "method holder must be initialized"); 815 816 if (CIPrintRequests) { 817 tty->print("request: "); 818 method->print_short_name(tty); 819 if (osr_bci != InvocationEntryBci) { 820 tty->print(" osr_bci: %d", osr_bci); 821 } 822 tty->print(" comment: %s count: %d", comment, hot_count); 823 if (!hot_method.is_null()) { 824 tty->print(" hot: "); 825 if (hot_method() != method()) { 826 hot_method->print_short_name(tty); 827 } else { 828 tty->print("yes"); 829 } 830 } 831 tty->cr(); 832 } 833 834 // A request has been made for compilation. Before we do any 835 // real work, check to see if the method has been compiled 836 // in the meantime with a definitive result. 837 if (compilation_is_complete(method, osr_bci, comp_level)) { 838 return; 839 } 840 841 // If this method is already in the compile queue, then 842 // we do not block the current thread. 843 if (compilation_is_in_queue(method, osr_bci)) { 844 // We may want to decay our counter a bit here to prevent 845 // multiple denied requests for compilation. This is an 846 // open compilation policy issue. Note: The other possibility, 847 // in the case that this is a blocking compile request, is to have 848 // all subsequent blocking requesters wait for completion of 849 // ongoing compiles. Note that in this case we'll need a protocol 850 // for freeing the associated compile tasks. [Or we could have 851 // a single static monitor on which all these waiters sleep.] 852 return; 853 } 854 855 // Outputs from the following MutexLocker block: 856 CompileTask* task = NULL; 857 bool blocking = false; 858 859 // Acquire our lock. 860 { 861 MutexLocker locker(_method_queue->lock(), THREAD); 862 863 // Make sure the method has not slipped into the queues since 864 // last we checked; note that those checks were "fast bail-outs". 865 // Here we need to be more careful, see 14012000 below. 866 if (compilation_is_in_queue(method, osr_bci)) { 867 return; 868 } 869 870 // We need to check again to see if the compilation has 871 // completed. A previous compilation may have registered 872 // some result. 873 if (compilation_is_complete(method, osr_bci, comp_level)) { 874 return; 875 } 876 877 // We now know that this compilation is not pending, complete, 878 // or prohibited. Assign a compile_id to this compilation 879 // and check to see if it is in our [Start..Stop) range. 880 uint compile_id = assign_compile_id(method, osr_bci); 881 if (compile_id == 0) { 882 // The compilation falls outside the allowed range. 883 return; 884 } 885 886 // Should this thread wait for completion of the compile? 887 blocking = is_compile_blocking(method, osr_bci); 888 889 // We will enter the compilation in the queue. 890 // 14012000: Note that this sets the queued_for_compile bits in 891 // the target method. We can now reason that a method cannot be 892 // queued for compilation more than once, as follows: 893 // Before a thread queues a task for compilation, it first acquires 894 // the compile queue lock, then checks if the method's queued bits 895 // are set or it has already been compiled. Thus there can not be two 896 // instances of a compilation task for the same method on the 897 // compilation queue. Consider now the case where the compilation 898 // thread has already removed a task for that method from the queue 899 // and is in the midst of compiling it. In this case, the 900 // queued_for_compile bits must be set in the method (and these 901 // will be visible to the current thread, since the bits were set 902 // under protection of the compile queue lock, which we hold now. 903 // When the compilation completes, the compiler thread first sets 904 // the compilation result and then clears the queued_for_compile 905 // bits. Neither of these actions are protected by a barrier (or done 906 // under the protection of a lock), so the only guarantee we have 907 // (on machines with TSO (Total Store Order)) is that these values 908 // will update in that order. As a result, the only combinations of 909 // these bits that the current thread will see are, in temporal order: 910 // <RESULT, QUEUE> : 911 // <0, 1> : in compile queue, but not yet compiled 912 // <1, 1> : compiled but queue bit not cleared 913 // <1, 0> : compiled and queue bit cleared 914 // Because we first check the queue bits then check the result bits, 915 // we are assured that we cannot introduce a duplicate task. 916 // Note that if we did the tests in the reverse order (i.e. check 917 // result then check queued bit), we could get the result bit before 918 // the compilation completed, and the queue bit after the compilation 919 // completed, and end up introducing a "duplicate" (redundant) task. 920 // In that case, the compiler thread should first check if a method 921 // has already been compiled before trying to compile it. 922 // NOTE: in the event that there are multiple compiler threads and 923 // there is de-optimization/recompilation, things will get hairy, 924 // and in that case it's best to protect both the testing (here) of 925 // these bits, and their updating (here and elsewhere) under a 926 // common lock. 927 task = create_compile_task(_method_queue, 928 compile_id, method, 929 osr_bci, comp_level, 930 hot_method, hot_count, comment, 931 blocking); 932 } 933 934 if (blocking) { 935 wait_for_completion(task); 936 } 937 } 938 939 940 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, 941 methodHandle hot_method, int hot_count, 942 const char* comment, TRAPS) { 943 // make sure arguments make sense 944 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); 945 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 946 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 947 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); 948 949 int comp_level = CompilationPolicy::policy()->compilation_level(method, osr_bci); 950 951 #ifdef TIERED 952 if (TieredCompilation && StressTieredRuntime) { 953 static int flipper = 0; 954 if (is_even(flipper++)) { 955 comp_level = CompLevel_fast_compile; 956 } else { 957 comp_level = CompLevel_full_optimization; 958 } 959 } 960 #ifdef SPARC 961 // QQQ FIX ME 962 // C2 only returns long results in G1 and c1 doesn't understand so disallow c2 963 // compiles of long results 964 if (TieredCompilation && method()->result_type() == T_LONG) { 965 comp_level = CompLevel_fast_compile; 966 } 967 #endif // SPARC 968 #endif // TIERED 969 970 // return quickly if possible 971 972 // lock, make sure that the compilation 973 // isn't prohibited in a straightforward way. 974 975 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { 976 return NULL; 977 } 978 979 if (osr_bci == InvocationEntryBci) { 980 // standard compilation 981 nmethod* method_code = method->code(); 982 if (method_code != NULL 983 #ifdef TIERED 984 && ( method_code->is_compiled_by_c2() || comp_level == CompLevel_fast_compile ) 985 #endif // TIERED 986 ) { 987 return method_code; 988 } 989 if (method->is_not_compilable(comp_level)) return NULL; 990 } else { 991 // osr compilation 992 #ifndef TIERED 993 // seems like an assert of dubious value 994 assert(comp_level == CompLevel_full_optimization, 995 "all OSR compiles are assumed to be at a single compilation lavel"); 996 #endif // TIERED 997 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci); 998 if (nm != NULL) return nm; 999 if (method->is_not_osr_compilable()) return NULL; 1000 } 1001 1002 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1003 // some prerequisites that are compiler specific 1004 if (compiler(comp_level)->is_c2()) { 1005 method->constants()->resolve_string_constants(CHECK_0); 1006 // Resolve all classes seen in the signature of the method 1007 // we are compiling. 1008 methodOopDesc::load_signature_classes(method, CHECK_0); 1009 } 1010 1011 // If the method is native, do the lookup in the thread requesting 1012 // the compilation. Native lookups can load code, which is not 1013 // permitted during compilation. 1014 // 1015 // Note: A native method implies non-osr compilation which is 1016 // checked with an assertion at the entry of this method. 1017 if (method->is_native()) { 1018 bool in_base_library; 1019 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1020 if (HAS_PENDING_EXCEPTION) { 1021 // In case of an exception looking up the method, we just forget 1022 // about it. The interpreter will kick-in and throw the exception. 1023 method->set_not_compilable(); // implies is_not_osr_compilable() 1024 CLEAR_PENDING_EXCEPTION; 1025 return NULL; 1026 } 1027 assert(method->has_native_function(), "must have native code by now"); 1028 } 1029 1030 // RedefineClasses() has replaced this method; just return 1031 if (method->is_old()) { 1032 return NULL; 1033 } 1034 1035 // JVMTI -- post_compile_event requires jmethod_id() that may require 1036 // a lock the compiling thread can not acquire. Prefetch it here. 1037 if (JvmtiExport::should_post_compiled_method_load()) { 1038 method->jmethod_id(); 1039 } 1040 1041 // do the compilation 1042 if (method->is_native()) { 1043 if (!PreferInterpreterNativeStubs) { 1044 (void) AdapterHandlerLibrary::create_native_wrapper(method); 1045 } else { 1046 return NULL; 1047 } 1048 } else { 1049 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); 1050 } 1051 1052 // return requested nmethod 1053 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci); 1054 } 1055 1056 1057 // ------------------------------------------------------------------ 1058 // CompileBroker::compilation_is_complete 1059 // 1060 // See if compilation of this method is already complete. 1061 bool CompileBroker::compilation_is_complete(methodHandle method, 1062 int osr_bci, 1063 int comp_level) { 1064 bool is_osr = (osr_bci != standard_entry_bci); 1065 if (is_osr) { 1066 if (method->is_not_osr_compilable()) { 1067 return true; 1068 } else { 1069 nmethod* result = method->lookup_osr_nmethod_for(osr_bci); 1070 return (result != NULL); 1071 } 1072 } else { 1073 if (method->is_not_compilable(comp_level)) { 1074 return true; 1075 } else { 1076 nmethod* result = method->code(); 1077 if (result == NULL) return false; 1078 #ifdef TIERED 1079 if (comp_level == CompLevel_fast_compile) { 1080 // At worst the code is from c1 1081 return true; 1082 } 1083 // comp level must be full opt 1084 return result->is_compiled_by_c2(); 1085 #endif // TIERED 1086 return true; 1087 } 1088 } 1089 } 1090 1091 1092 // ------------------------------------------------------------------ 1093 // CompileBroker::compilation_is_in_queue 1094 // 1095 // See if this compilation is already requested. 1096 // 1097 // Implementation note: there is only a single "is in queue" bit 1098 // for each method. This means that the check below is overly 1099 // conservative in the sense that an osr compilation in the queue 1100 // will block a normal compilation from entering the queue (and vice 1101 // versa). This can be remedied by a full queue search to disambiguate 1102 // cases. If it is deemed profitible, this may be done. 1103 bool CompileBroker::compilation_is_in_queue(methodHandle method, 1104 int osr_bci) { 1105 return method->queued_for_compilation(); 1106 } 1107 1108 1109 // ------------------------------------------------------------------ 1110 // CompileBroker::compilation_is_prohibited 1111 // 1112 // See if this compilation is not allowed. 1113 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { 1114 bool is_native = method->is_native(); 1115 // Some compilers may not support the compilation of natives. 1116 // QQQ this needs some work ought to only record not compilable at 1117 // the specified level 1118 if (is_native && 1119 (!CICompileNatives || !compiler(comp_level)->supports_native())) { 1120 method->set_not_compilable(); 1121 return true; 1122 } 1123 1124 bool is_osr = (osr_bci != standard_entry_bci); 1125 // Some compilers may not support on stack replacement. 1126 if (is_osr && 1127 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { 1128 method->set_not_osr_compilable(); 1129 return true; 1130 } 1131 1132 // The method may be explicitly excluded by the user. 1133 bool quietly; 1134 if (CompilerOracle::should_exclude(method, quietly)) { 1135 if (!quietly) { 1136 // This does not happen quietly... 1137 ResourceMark rm; 1138 tty->print("### Excluding %s:%s", 1139 method->is_native() ? "generation of native wrapper" : "compile", 1140 (method->is_static() ? " static" : "")); 1141 method->print_short_name(tty); 1142 tty->cr(); 1143 } 1144 method->set_not_compilable(); 1145 } 1146 1147 return false; 1148 } 1149 1150 1151 // ------------------------------------------------------------------ 1152 // CompileBroker::assign_compile_id 1153 // 1154 // Assign a serialized id number to this compilation request. If the 1155 // number falls out of the allowed range, return a 0. OSR 1156 // compilations may be numbered separately from regular compilations 1157 // if certain debugging flags are used. 1158 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { 1159 assert(_method_queue->lock()->owner() == JavaThread::current(), 1160 "must hold the compilation queue lock"); 1161 bool is_osr = (osr_bci != standard_entry_bci); 1162 assert(!method->is_native(), "no longer compile natives"); 1163 uint id; 1164 if (CICountOSR && is_osr) { 1165 id = ++_osr_compilation_id; 1166 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { 1167 return id; 1168 } 1169 } else { 1170 id = ++_compilation_id; 1171 if ((uint)CIStart <= id && id < (uint)CIStop) { 1172 return id; 1173 } 1174 } 1175 1176 // Method was not in the appropriate compilation range. 1177 method->set_not_compilable(); 1178 return 0; 1179 } 1180 1181 1182 // ------------------------------------------------------------------ 1183 // CompileBroker::is_compile_blocking 1184 // 1185 // Should the current thread be blocked until this compilation request 1186 // has been fulfilled? 1187 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { 1188 return !BackgroundCompilation; 1189 } 1190 1191 1192 // ------------------------------------------------------------------ 1193 // CompileBroker::preload_classes 1194 void CompileBroker::preload_classes(methodHandle method, TRAPS) { 1195 // Move this code over from c1_Compiler.cpp 1196 ShouldNotReachHere(); 1197 } 1198 1199 1200 // ------------------------------------------------------------------ 1201 // CompileBroker::create_compile_task 1202 // 1203 // Create a CompileTask object representing the current request for 1204 // compilation. Add this task to the queue. 1205 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1206 int compile_id, 1207 methodHandle method, 1208 int osr_bci, 1209 int comp_level, 1210 methodHandle hot_method, 1211 int hot_count, 1212 const char* comment, 1213 bool blocking) { 1214 CompileTask* new_task = allocate_task(); 1215 new_task->initialize(compile_id, method, osr_bci, comp_level, 1216 hot_method, hot_count, comment, 1217 blocking); 1218 queue->add(new_task); 1219 return new_task; 1220 } 1221 1222 1223 // ------------------------------------------------------------------ 1224 // CompileBroker::allocate_task 1225 // 1226 // Allocate a CompileTask, from the free list if possible. 1227 CompileTask* CompileBroker::allocate_task() { 1228 MutexLocker locker(CompileTaskAlloc_lock); 1229 CompileTask* task = NULL; 1230 if (_task_free_list != NULL) { 1231 task = _task_free_list; 1232 _task_free_list = task->next(); 1233 task->set_next(NULL); 1234 } else { 1235 task = new CompileTask(); 1236 task->set_next(NULL); 1237 } 1238 return task; 1239 } 1240 1241 1242 // ------------------------------------------------------------------ 1243 // CompileBroker::free_task 1244 // 1245 // Add a task to the free list. 1246 void CompileBroker::free_task(CompileTask* task) { 1247 MutexLocker locker(CompileTaskAlloc_lock); 1248 task->free(); 1249 task->set_next(_task_free_list); 1250 _task_free_list = task; 1251 } 1252 1253 1254 // ------------------------------------------------------------------ 1255 // CompileBroker::wait_for_completion 1256 // 1257 // Wait for the given method CompileTask to complete. 1258 void CompileBroker::wait_for_completion(CompileTask* task) { 1259 if (CIPrintCompileQueue) { 1260 tty->print_cr("BLOCKING FOR COMPILE"); 1261 } 1262 1263 assert(task->is_blocking(), "can only wait on blocking task"); 1264 1265 JavaThread *thread = JavaThread::current(); 1266 thread->set_blocked_on_compilation(true); 1267 1268 methodHandle method(thread, 1269 (methodOop)JNIHandles::resolve(task->method_handle())); 1270 { 1271 MutexLocker waiter(task->lock(), thread); 1272 1273 while (!task->is_complete()) 1274 task->lock()->wait(); 1275 } 1276 // It is harmless to check this status without the lock, because 1277 // completion is a stable property (until the task object is recycled). 1278 assert(task->is_complete(), "Compilation should have completed"); 1279 assert(task->code_handle() == NULL, "must be reset"); 1280 1281 thread->set_blocked_on_compilation(false); 1282 1283 // By convention, the waiter is responsible for recycling a 1284 // blocking CompileTask. Since there is only one waiter ever 1285 // waiting on a CompileTask, we know that no one else will 1286 // be using this CompileTask; we can free it. 1287 free_task(task); 1288 } 1289 1290 // ------------------------------------------------------------------ 1291 // CompileBroker::compiler_thread_loop 1292 // 1293 // The main loop run by a CompilerThread. 1294 void CompileBroker::compiler_thread_loop() { 1295 CompilerThread* thread = CompilerThread::current(); 1296 CompileQueue* queue = thread->queue(); 1297 1298 // For the thread that initializes the ciObjectFactory 1299 // this resource mark holds all the shared objects 1300 ResourceMark rm; 1301 1302 // First thread to get here will initialize the compiler interface 1303 1304 if (!ciObjectFactory::is_initialized()) { 1305 ASSERT_IN_VM; 1306 MutexLocker only_one (CompileThread_lock, thread); 1307 if (!ciObjectFactory::is_initialized()) { 1308 ciObjectFactory::initialize(); 1309 } 1310 } 1311 1312 // Open a log. 1313 if (LogCompilation) { 1314 init_compiler_thread_log(); 1315 } 1316 CompileLog* log = thread->log(); 1317 if (log != NULL) { 1318 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", 1319 os::current_thread_id(), 1320 os::current_process_id()); 1321 log->stamp(); 1322 log->end_elem(); 1323 } 1324 1325 while (true) { 1326 { 1327 // We need this HandleMark to avoid leaking VM handles. 1328 HandleMark hm(thread); 1329 1330 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) { 1331 // the code cache is really full 1332 handle_full_code_cache(); 1333 } else if (UseCodeCacheFlushing && (CodeCache::unallocated_capacity() < CodeCacheFlushingMinimumFreeSpace)) { 1334 // Attempt to start cleaning the code cache while there is still a little headroom 1335 NMethodSweeper::handle_full_code_cache(false); 1336 } 1337 1338 CompileTask* task = queue->get(); 1339 1340 // Give compiler threads an extra quanta. They tend to be bursty and 1341 // this helps the compiler to finish up the job. 1342 if( CompilerThreadHintNoPreempt ) 1343 os::hint_no_preempt(); 1344 1345 // trace per thread time and compile statistics 1346 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); 1347 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); 1348 1349 // Assign the task to the current thread. Mark this compilation 1350 // thread as active for the profiler. 1351 CompileTaskWrapper ctw(task); 1352 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1353 task->set_code_handle(&result_handle); 1354 methodHandle method(thread, 1355 (methodOop)JNIHandles::resolve(task->method_handle())); 1356 1357 // Never compile a method if breakpoints are present in it 1358 if (method()->number_of_breakpoints() == 0) { 1359 // Compile the method. 1360 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1361 #ifdef COMPILER1 1362 // Allow repeating compilations for the purpose of benchmarking 1363 // compile speed. This is not useful for customers. 1364 if (CompilationRepeat != 0) { 1365 int compile_count = CompilationRepeat; 1366 while (compile_count > 0) { 1367 invoke_compiler_on_method(task); 1368 nmethod* nm = method->code(); 1369 if (nm != NULL) { 1370 nm->make_zombie(); 1371 method->clear_code(); 1372 } 1373 compile_count--; 1374 } 1375 } 1376 #endif /* COMPILER1 */ 1377 invoke_compiler_on_method(task); 1378 } else { 1379 // After compilation is disabled, remove remaining methods from queue 1380 method->clear_queued_for_compilation(); 1381 } 1382 } 1383 } 1384 } 1385 } 1386 1387 1388 // ------------------------------------------------------------------ 1389 // CompileBroker::init_compiler_thread_log 1390 // 1391 // Set up state required by +LogCompilation. 1392 void CompileBroker::init_compiler_thread_log() { 1393 CompilerThread* thread = CompilerThread::current(); 1394 char fileBuf[4*K]; 1395 FILE* fp = NULL; 1396 char* file = NULL; 1397 intx thread_id = os::current_thread_id(); 1398 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1399 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1400 if (dir == NULL) dir = ""; 1401 sprintf(fileBuf, "%shs_c" UINTX_FORMAT "_pid%u.log", 1402 dir, thread_id, os::current_process_id()); 1403 fp = fopen(fileBuf, "at"); 1404 if (fp != NULL) { 1405 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); 1406 strcpy(file, fileBuf); 1407 break; 1408 } 1409 } 1410 if (fp == NULL) { 1411 warning("Cannot open log file: %s", fileBuf); 1412 } else { 1413 if (LogCompilation && Verbose) 1414 tty->print_cr("Opening compilation log %s", file); 1415 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); 1416 thread->init_log(log); 1417 1418 if (xtty != NULL) { 1419 ttyLocker ttyl; 1420 1421 // Record any per thread log files 1422 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); 1423 } 1424 } 1425 } 1426 1427 // ------------------------------------------------------------------ 1428 // CompileBroker::set_should_block 1429 // 1430 // Set _should_block. 1431 // Call this from the VM, with Threads_lock held and a safepoint requested. 1432 void CompileBroker::set_should_block() { 1433 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1434 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1435 #ifndef PRODUCT 1436 if (PrintCompilation && (Verbose || WizardMode)) 1437 tty->print_cr("notifying compiler thread pool to block"); 1438 #endif 1439 _should_block = true; 1440 } 1441 1442 // ------------------------------------------------------------------ 1443 // CompileBroker::maybe_block 1444 // 1445 // Call this from the compiler at convenient points, to poll for _should_block. 1446 void CompileBroker::maybe_block() { 1447 if (_should_block) { 1448 #ifndef PRODUCT 1449 if (PrintCompilation && (Verbose || WizardMode)) 1450 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); 1451 #endif 1452 ThreadInVMfromNative tivfn(JavaThread::current()); 1453 } 1454 } 1455 1456 1457 // ------------------------------------------------------------------ 1458 // CompileBroker::invoke_compiler_on_method 1459 // 1460 // Compile a method. 1461 // 1462 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1463 if (PrintCompilation) { 1464 ResourceMark rm; 1465 task->print_line(); 1466 } 1467 elapsedTimer time; 1468 1469 CompilerThread* thread = CompilerThread::current(); 1470 ResourceMark rm(thread); 1471 1472 // Common flags. 1473 uint compile_id = task->compile_id(); 1474 int osr_bci = task->osr_bci(); 1475 bool is_osr = (osr_bci != standard_entry_bci); 1476 bool should_log = (thread->log() != NULL); 1477 bool should_break = false; 1478 { 1479 // create the handle inside it's own block so it can't 1480 // accidentally be referenced once the thread transitions to 1481 // native. The NoHandleMark before the transition should catch 1482 // any cases where this occurs in the future. 1483 methodHandle method(thread, 1484 (methodOop)JNIHandles::resolve(task->method_handle())); 1485 should_break = check_break_at(method, compile_id, is_osr); 1486 if (should_log && !CompilerOracle::should_log(method)) { 1487 should_log = false; 1488 } 1489 assert(!method->is_native(), "no longer compile natives"); 1490 1491 // Save information about this method in case of failure. 1492 set_last_compile(thread, method, is_osr, task->comp_level()); 1493 1494 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); 1495 } 1496 1497 // Allocate a new set of JNI handles. 1498 push_jni_handle_block(); 1499 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); 1500 int compilable = ciEnv::MethodCompilable; 1501 { 1502 int system_dictionary_modification_counter; 1503 { 1504 MutexLocker locker(Compile_lock, thread); 1505 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1506 } 1507 1508 NoHandleMark nhm; 1509 ThreadToNativeFromVM ttn(thread); 1510 1511 ciEnv ci_env(task, system_dictionary_modification_counter); 1512 if (should_break) { 1513 ci_env.set_break_at_compile(true); 1514 } 1515 if (should_log) { 1516 ci_env.set_log(thread->log()); 1517 } 1518 assert(thread->env() == &ci_env, "set by ci_env"); 1519 // The thread-env() field is cleared in ~CompileTaskWrapper. 1520 1521 // Cache Jvmti state 1522 ci_env.cache_jvmti_state(); 1523 1524 // Cache DTrace flags 1525 ci_env.cache_dtrace_flags(); 1526 1527 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1528 1529 TraceTime t1("compilation", &time); 1530 1531 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); 1532 1533 if (!ci_env.failing() && task->code() == NULL) { 1534 //assert(false, "compiler should always document failure"); 1535 // The compiler elected, without comment, not to register a result. 1536 // Do not attempt further compilations of this method. 1537 ci_env.record_method_not_compilable("compile failed"); 1538 } 1539 1540 if (ci_env.failing()) { 1541 // Copy this bit to the enclosing block: 1542 compilable = ci_env.compilable(); 1543 if (PrintCompilation) { 1544 const char* reason = ci_env.failure_reason(); 1545 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1546 if (is_highest_tier_compile(ci_env.comp_level())) { 1547 // Already at highest tier, promote to not compilable. 1548 compilable = ciEnv::MethodCompilable_never; 1549 } else { 1550 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); 1551 } 1552 } 1553 1554 if (compilable == ciEnv::MethodCompilable_never) { 1555 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); 1556 } else if (compilable == ciEnv::MethodCompilable) { 1557 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason); 1558 } 1559 } 1560 } else { 1561 task->mark_success(); 1562 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); 1563 } 1564 } 1565 pop_jni_handle_block(); 1566 1567 methodHandle method(thread, 1568 (methodOop)JNIHandles::resolve(task->method_handle())); 1569 1570 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); 1571 1572 collect_statistics(thread, time, task); 1573 1574 if (compilable == ciEnv::MethodCompilable_never) { 1575 if (is_osr) { 1576 method->set_not_osr_compilable(); 1577 } else { 1578 method->set_not_compilable(); 1579 } 1580 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1581 method->set_not_compilable(task->comp_level()); 1582 } 1583 1584 // Note that the queued_for_compilation bits are cleared without 1585 // protection of a mutex. [They were set by the requester thread, 1586 // when adding the task to the complie queue -- at which time the 1587 // compile queue lock was held. Subsequently, we acquired the compile 1588 // queue lock to get this task off the compile queue; thus (to belabour 1589 // the point somewhat) our clearing of the bits must be occurring 1590 // only after the setting of the bits. See also 14012000 above. 1591 method->clear_queued_for_compilation(); 1592 1593 #ifdef ASSERT 1594 if (CollectedHeap::fired_fake_oom()) { 1595 // The current compile received a fake OOM during compilation so 1596 // go ahead and exit the VM since the test apparently succeeded 1597 tty->print_cr("*** Shutting down VM after successful fake OOM"); 1598 vm_exit(0); 1599 } 1600 #endif 1601 } 1602 1603 1604 // ------------------------------------------------------------------ 1605 // CompileBroker::handle_full_code_cache 1606 // 1607 // The CodeCache is full. Print out warning and disable compilation or 1608 // try code cache cleaning so compilation can continue later. 1609 void CompileBroker::handle_full_code_cache() { 1610 UseInterpreter = true; 1611 if (UseCompiler || AlwaysCompileLoopMethods ) { 1612 #ifndef PRODUCT 1613 warning("CodeCache is full. Compiler has been disabled"); 1614 if (CompileTheWorld || ExitOnFullCodeCache) { 1615 before_exit(JavaThread::current()); 1616 exit_globals(); // will delete tty 1617 vm_direct_exit(CompileTheWorld ? 0 : 1); 1618 } 1619 #endif 1620 if (UseCodeCacheFlushing) { 1621 NMethodSweeper::handle_full_code_cache(true); 1622 } else { 1623 UseCompiler = false; 1624 AlwaysCompileLoopMethods = false; 1625 } 1626 } 1627 } 1628 1629 // ------------------------------------------------------------------ 1630 // CompileBroker::set_last_compile 1631 // 1632 // Record this compilation for debugging purposes. 1633 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { 1634 ResourceMark rm; 1635 char* method_name = method->name()->as_C_string(); 1636 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 1637 char current_method[CompilerCounters::cmname_buffer_length]; 1638 size_t maxLen = CompilerCounters::cmname_buffer_length; 1639 1640 if (UsePerfData) { 1641 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); 1642 1643 size_t s1len = strlen(class_name); 1644 size_t s2len = strlen(method_name); 1645 1646 // check if we need to truncate the string 1647 if (s1len + s2len + 2 > maxLen) { 1648 1649 // the strategy is to lop off the leading characters of the 1650 // class name and the trailing characters of the method name. 1651 1652 if (s2len + 2 > maxLen) { 1653 // lop of the entire class name string, let snprintf handle 1654 // truncation of the method name. 1655 class_name += s1len; // null string 1656 } 1657 else { 1658 // lop off the extra characters from the front of the class name 1659 class_name += ((s1len + s2len + 2) - maxLen); 1660 } 1661 } 1662 1663 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 1664 } 1665 1666 if (CICountOSR && is_osr) { 1667 _last_compile_type = osr_compile; 1668 } else { 1669 _last_compile_type = normal_compile; 1670 } 1671 _last_compile_level = comp_level; 1672 1673 if (UsePerfData) { 1674 CompilerCounters* counters = thread->counters(); 1675 counters->set_current_method(current_method); 1676 counters->set_compile_type((jlong)_last_compile_type); 1677 } 1678 } 1679 1680 1681 // ------------------------------------------------------------------ 1682 // CompileBroker::push_jni_handle_block 1683 // 1684 // Push on a new block of JNI handles. 1685 void CompileBroker::push_jni_handle_block() { 1686 JavaThread* thread = JavaThread::current(); 1687 1688 // Allocate a new block for JNI handles. 1689 // Inlined code from jni_PushLocalFrame() 1690 JNIHandleBlock* java_handles = thread->active_handles(); 1691 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 1692 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 1693 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 1694 thread->set_active_handles(compile_handles); 1695 } 1696 1697 1698 // ------------------------------------------------------------------ 1699 // CompileBroker::pop_jni_handle_block 1700 // 1701 // Pop off the current block of JNI handles. 1702 void CompileBroker::pop_jni_handle_block() { 1703 JavaThread* thread = JavaThread::current(); 1704 1705 // Release our JNI handle block 1706 JNIHandleBlock* compile_handles = thread->active_handles(); 1707 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 1708 thread->set_active_handles(java_handles); 1709 compile_handles->set_pop_frame_link(NULL); 1710 JNIHandleBlock::release_block(compile_handles, thread); // may block 1711 } 1712 1713 1714 // ------------------------------------------------------------------ 1715 // CompileBroker::check_break_at 1716 // 1717 // Should the compilation break at the current compilation. 1718 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { 1719 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { 1720 return true; 1721 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling 1722 return true; 1723 } else { 1724 return (compile_id == CIBreakAt); 1725 } 1726 } 1727 1728 // ------------------------------------------------------------------ 1729 // CompileBroker::collect_statistics 1730 // 1731 // Collect statistics about the compilation. 1732 1733 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 1734 bool success = task->is_success(); 1735 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); 1736 uint compile_id = task->compile_id(); 1737 bool is_osr = (task->osr_bci() != standard_entry_bci); 1738 nmethod* code = task->code(); 1739 CompilerCounters* counters = thread->counters(); 1740 1741 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 1742 MutexLocker locker(CompileStatistics_lock); 1743 1744 // _perf variables are production performance counters which are 1745 // updated regardless of the setting of the CITime and CITimeEach flags 1746 // 1747 if (!success) { 1748 _total_bailout_count++; 1749 if (UsePerfData) { 1750 _perf_last_failed_method->set_value(counters->current_method()); 1751 _perf_last_failed_type->set_value(counters->compile_type()); 1752 _perf_total_bailout_count->inc(); 1753 } 1754 } else if (code == NULL) { 1755 if (UsePerfData) { 1756 _perf_last_invalidated_method->set_value(counters->current_method()); 1757 _perf_last_invalidated_type->set_value(counters->compile_type()); 1758 _perf_total_invalidated_count->inc(); 1759 } 1760 _total_invalidated_count++; 1761 } else { 1762 // Compilation succeeded 1763 1764 // update compilation ticks - used by the implementation of 1765 // java.lang.management.CompilationMBean 1766 _perf_total_compilation->inc(time.ticks()); 1767 1768 if (CITime) { 1769 _t_total_compilation.add(time); 1770 if (is_osr) { 1771 _t_osr_compilation.add(time); 1772 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1773 } else { 1774 _t_standard_compilation.add(time); 1775 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1776 } 1777 } 1778 1779 if (UsePerfData) { 1780 // save the name of the last method compiled 1781 _perf_last_method->set_value(counters->current_method()); 1782 _perf_last_compile_type->set_value(counters->compile_type()); 1783 _perf_last_compile_size->set_value(method->code_size() + 1784 task->num_inlined_bytecodes()); 1785 if (is_osr) { 1786 _perf_osr_compilation->inc(time.ticks()); 1787 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1788 } else { 1789 _perf_standard_compilation->inc(time.ticks()); 1790 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1791 } 1792 } 1793 1794 if (CITimeEach) { 1795 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 1796 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 1797 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 1798 } 1799 1800 // Collect counts of successful compilations 1801 _sum_nmethod_size += code->total_size(); 1802 _sum_nmethod_code_size += code->code_size(); 1803 _total_compile_count++; 1804 1805 if (UsePerfData) { 1806 _perf_sum_nmethod_size->inc(code->total_size()); 1807 _perf_sum_nmethod_code_size->inc(code->code_size()); 1808 _perf_total_compile_count->inc(); 1809 } 1810 1811 if (is_osr) { 1812 if (UsePerfData) _perf_total_osr_compile_count->inc(); 1813 _total_osr_compile_count++; 1814 } else { 1815 if (UsePerfData) _perf_total_standard_compile_count->inc(); 1816 _total_standard_compile_count++; 1817 } 1818 } 1819 // set the current method for the thread to null 1820 if (UsePerfData) counters->set_current_method(""); 1821 } 1822 1823 1824 1825 void CompileBroker::print_times() { 1826 tty->cr(); 1827 tty->print_cr("Accumulated compiler times (for compiled methods only)"); 1828 tty->print_cr("------------------------------------------------"); 1829 //0000000000111111111122222222223333333333444444444455555555556666666666 1830 //0123456789012345678901234567890123456789012345678901234567890123456789 1831 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); 1832 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", 1833 CompileBroker::_t_standard_compilation.seconds(), 1834 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); 1835 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); 1836 compiler(CompLevel_fast_compile)->print_timers(); 1837 if (compiler(CompLevel_fast_compile) != compiler(CompLevel_highest_tier)) { 1838 compiler(CompLevel_highest_tier)->print_timers(); 1839 } 1840 1841 tty->cr(); 1842 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; 1843 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); 1844 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); 1845 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); 1846 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); 1847 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); 1848 tty->cr(); 1849 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); 1850 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); 1851 } 1852 1853 1854 // Debugging output for failure 1855 void CompileBroker::print_last_compile() { 1856 if ( _last_compile_level != CompLevel_none && 1857 compiler(_last_compile_level) != NULL && 1858 _last_method_compiled != NULL && 1859 _last_compile_type != no_compile) { 1860 if (_last_compile_type == osr_compile) { 1861 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 1862 _osr_compilation_id, _last_compile_level, _last_method_compiled); 1863 } else { 1864 tty->print_cr("Last parse: %d+++(%d) %s", 1865 _compilation_id, _last_compile_level, _last_method_compiled); 1866 } 1867 } 1868 } 1869 1870 1871 void CompileBroker::print_compiler_threads_on(outputStream* st) { 1872 #ifndef PRODUCT 1873 st->print_cr("Compiler thread printing unimplemented."); 1874 st->cr(); 1875 #endif 1876 }