compileBroker.cpp revision 2062:3582bf76420e
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 */ 24 25#include "precompiled.hpp" 26#include "classfile/systemDictionary.hpp" 27#include "classfile/vmSymbols.hpp" 28#include "code/codeCache.hpp" 29#include "compiler/compileBroker.hpp" 30#include "compiler/compileLog.hpp" 31#include "compiler/compilerOracle.hpp" 32#include "interpreter/linkResolver.hpp" 33#include "memory/allocation.inline.hpp" 34#include "oops/methodDataOop.hpp" 35#include "oops/methodOop.hpp" 36#include "oops/oop.inline.hpp" 37#include "prims/nativeLookup.hpp" 38#include "runtime/arguments.hpp" 39#include "runtime/compilationPolicy.hpp" 40#include "runtime/init.hpp" 41#include "runtime/interfaceSupport.hpp" 42#include "runtime/javaCalls.hpp" 43#include "runtime/os.hpp" 44#include "runtime/sharedRuntime.hpp" 45#include "runtime/sweeper.hpp" 46#include "utilities/dtrace.hpp" 47#ifdef COMPILER1 48#include "c1/c1_Compiler.hpp" 49#endif 50#ifdef COMPILER2 51#include "opto/c2compiler.hpp" 52#endif 53#ifdef SHARK 54#include "shark/sharkCompiler.hpp" 55#endif 56 57#ifdef DTRACE_ENABLED 58 59// Only bother with this argument setup if dtrace is available 60 61HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, 62 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); 63HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, 64 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); 65 66#define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ 67 { \ 68 char* comp_name = (char*)(compiler)->name(); \ 69 Symbol* klass_name = (method)->klass_name(); \ 70 Symbol* name = (method)->name(); \ 71 Symbol* signature = (method)->signature(); \ 72 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ 73 comp_name, strlen(comp_name), \ 74 klass_name->bytes(), klass_name->utf8_length(), \ 75 name->bytes(), name->utf8_length(), \ 76 signature->bytes(), signature->utf8_length()); \ 77 } 78 79#define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ 80 { \ 81 char* comp_name = (char*)(compiler)->name(); \ 82 Symbol* klass_name = (method)->klass_name(); \ 83 Symbol* name = (method)->name(); \ 84 Symbol* signature = (method)->signature(); \ 85 HS_DTRACE_PROBE9(hotspot, method__compile__end, \ 86 comp_name, strlen(comp_name), \ 87 klass_name->bytes(), klass_name->utf8_length(), \ 88 name->bytes(), name->utf8_length(), \ 89 signature->bytes(), signature->utf8_length(), (success)); \ 90 } 91 92#else // ndef DTRACE_ENABLED 93 94#define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) 95#define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) 96 97#endif // ndef DTRACE_ENABLED 98 99bool CompileBroker::_initialized = false; 100volatile bool CompileBroker::_should_block = false; 101volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 102 103// The installed compiler(s) 104AbstractCompiler* CompileBroker::_compilers[2]; 105 106// These counters are used for assigning id's to each compilation 107uint CompileBroker::_compilation_id = 0; 108uint CompileBroker::_osr_compilation_id = 0; 109 110// Debugging information 111int CompileBroker::_last_compile_type = no_compile; 112int CompileBroker::_last_compile_level = CompLevel_none; 113char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 114 115// Performance counters 116PerfCounter* CompileBroker::_perf_total_compilation = NULL; 117PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 118PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 119 120PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 121PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 122PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 123PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 124PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 125 126PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 127PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 128PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 129PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 130 131PerfStringVariable* CompileBroker::_perf_last_method = NULL; 132PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 133PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 134PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 135PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 136PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 137PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 138 139// Timers and counters for generating statistics 140elapsedTimer CompileBroker::_t_total_compilation; 141elapsedTimer CompileBroker::_t_osr_compilation; 142elapsedTimer CompileBroker::_t_standard_compilation; 143 144int CompileBroker::_total_bailout_count = 0; 145int CompileBroker::_total_invalidated_count = 0; 146int CompileBroker::_total_compile_count = 0; 147int CompileBroker::_total_osr_compile_count = 0; 148int CompileBroker::_total_standard_compile_count = 0; 149 150int CompileBroker::_sum_osr_bytes_compiled = 0; 151int CompileBroker::_sum_standard_bytes_compiled = 0; 152int CompileBroker::_sum_nmethod_size = 0; 153int CompileBroker::_sum_nmethod_code_size = 0; 154 155CompileQueue* CompileBroker::_c2_method_queue = NULL; 156CompileQueue* CompileBroker::_c1_method_queue = NULL; 157CompileTask* CompileBroker::_task_free_list = NULL; 158 159GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; 160 161 162CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 163 CompilerThread* thread = CompilerThread::current(); 164 thread->set_task(task); 165 CompileLog* log = thread->log(); 166 if (log != NULL) task->log_task_start(log); 167} 168 169CompileTaskWrapper::~CompileTaskWrapper() { 170 CompilerThread* thread = CompilerThread::current(); 171 CompileTask* task = thread->task(); 172 CompileLog* log = thread->log(); 173 if (log != NULL) task->log_task_done(log); 174 thread->set_task(NULL); 175 task->set_code_handle(NULL); 176 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); 177 if (task->is_blocking()) { 178 MutexLocker notifier(task->lock(), thread); 179 task->mark_complete(); 180 // Notify the waiting thread that the compilation has completed. 181 task->lock()->notify_all(); 182 } else { 183 task->mark_complete(); 184 185 // By convention, the compiling thread is responsible for 186 // recycling a non-blocking CompileTask. 187 CompileBroker::free_task(task); 188 } 189} 190 191 192// ------------------------------------------------------------------ 193// CompileTask::initialize 194void CompileTask::initialize(int compile_id, 195 methodHandle method, 196 int osr_bci, 197 int comp_level, 198 methodHandle hot_method, 199 int hot_count, 200 const char* comment, 201 bool is_blocking) { 202 assert(!_lock->is_locked(), "bad locking"); 203 204 _compile_id = compile_id; 205 _method = JNIHandles::make_global(method); 206 _osr_bci = osr_bci; 207 _is_blocking = is_blocking; 208 _comp_level = comp_level; 209 _num_inlined_bytecodes = 0; 210 211 _is_complete = false; 212 _is_success = false; 213 _code_handle = NULL; 214 215 _hot_method = NULL; 216 _hot_count = hot_count; 217 _time_queued = 0; // tidy 218 _comment = comment; 219 220 if (LogCompilation) { 221 _time_queued = os::elapsed_counter(); 222 if (hot_method.not_null()) { 223 if (hot_method == method) { 224 _hot_method = _method; 225 } else { 226 _hot_method = JNIHandles::make_global(hot_method); 227 } 228 } 229 } 230 231 _next = NULL; 232} 233 234// ------------------------------------------------------------------ 235// CompileTask::code/set_code 236nmethod* CompileTask::code() const { 237 if (_code_handle == NULL) return NULL; 238 return _code_handle->code(); 239} 240void CompileTask::set_code(nmethod* nm) { 241 if (_code_handle == NULL && nm == NULL) return; 242 guarantee(_code_handle != NULL, ""); 243 _code_handle->set_code(nm); 244 if (nm == NULL) _code_handle = NULL; // drop the handle also 245} 246 247// ------------------------------------------------------------------ 248// CompileTask::free 249void CompileTask::free() { 250 set_code(NULL); 251 assert(!_lock->is_locked(), "Should not be locked when freed"); 252 if (_hot_method != NULL && _hot_method != _method) { 253 JNIHandles::destroy_global(_hot_method); 254 } 255 JNIHandles::destroy_global(_method); 256} 257 258 259// ------------------------------------------------------------------ 260// CompileTask::print 261void CompileTask::print() { 262 tty->print("<CompileTask compile_id=%d ", _compile_id); 263 tty->print("method="); 264 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); 265 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", 266 _osr_bci, bool_to_str(_is_blocking), 267 bool_to_str(_is_complete), bool_to_str(_is_success)); 268} 269 270 271void CompileTask::print_compilation(outputStream *st, methodOop method, char* method_name) { 272 nmethod::print_compilation(st, method_name,/*title*/ NULL, method, 273 is_blocking(), compile_id(), osr_bci(), comp_level()); 274} 275 276// ------------------------------------------------------------------ 277// CompileTask::print_line_on_error 278// 279// This function is called by fatal error handler when the thread 280// causing troubles is a compiler thread. 281// 282// Do not grab any lock, do not allocate memory. 283// 284// Otherwise it's the same as CompileTask::print_line() 285// 286void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { 287 methodOop method = (methodOop)JNIHandles::resolve(_method); 288 // print compiler name 289 st->print("%s:", CompileBroker::compiler(comp_level())->name()); 290 char* method_name = NULL; 291 if (method != NULL) { 292 method_name = method->name_and_sig_as_C_string(buf, buflen); 293 } 294 print_compilation(st, method, method_name); 295} 296 297// ------------------------------------------------------------------ 298// CompileTask::print_line 299void CompileTask::print_line() { 300 Thread *thread = Thread::current(); 301 methodHandle method(thread, 302 (methodOop)JNIHandles::resolve(method_handle())); 303 ResourceMark rm(thread); 304 305 ttyLocker ttyl; // keep the following output all in one block 306 307 // print compiler name if requested 308 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); 309 print_compilation(tty, method(), NULL); 310} 311 312 313// ------------------------------------------------------------------ 314// CompileTask::log_task 315void CompileTask::log_task(xmlStream* log) { 316 Thread* thread = Thread::current(); 317 methodHandle method(thread, 318 (methodOop)JNIHandles::resolve(method_handle())); 319 ResourceMark rm(thread); 320 321 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> 322 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); 323 if (_osr_bci != CompileBroker::standard_entry_bci) { 324 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind 325 } // else compile_kind='c2c' 326 if (!method.is_null()) log->method(method); 327 if (_osr_bci != CompileBroker::standard_entry_bci) { 328 log->print(" osr_bci='%d'", _osr_bci); 329 } 330 if (_comp_level != CompLevel_highest_tier) { 331 log->print(" level='%d'", _comp_level); 332 } 333 if (_is_blocking) { 334 log->print(" blocking='1'"); 335 } 336 log->stamp(); 337} 338 339 340// ------------------------------------------------------------------ 341// CompileTask::log_task_queued 342void CompileTask::log_task_queued() { 343 Thread* thread = Thread::current(); 344 ttyLocker ttyl; 345 ResourceMark rm(thread); 346 347 xtty->begin_elem("task_queued"); 348 log_task(xtty); 349 if (_comment != NULL) { 350 xtty->print(" comment='%s'", _comment); 351 } 352 if (_hot_method != NULL) { 353 methodHandle hot(thread, 354 (methodOop)JNIHandles::resolve(_hot_method)); 355 methodHandle method(thread, 356 (methodOop)JNIHandles::resolve(_method)); 357 if (hot() != method()) { 358 xtty->method(hot); 359 } 360 } 361 if (_hot_count != 0) { 362 xtty->print(" hot_count='%d'", _hot_count); 363 } 364 xtty->end_elem(); 365} 366 367 368// ------------------------------------------------------------------ 369// CompileTask::log_task_start 370void CompileTask::log_task_start(CompileLog* log) { 371 log->begin_head("task"); 372 log_task(log); 373 log->end_head(); 374} 375 376 377// ------------------------------------------------------------------ 378// CompileTask::log_task_done 379void CompileTask::log_task_done(CompileLog* log) { 380 Thread* thread = Thread::current(); 381 methodHandle method(thread, 382 (methodOop)JNIHandles::resolve(method_handle())); 383 ResourceMark rm(thread); 384 385 // <task_done ... stamp='1.234'> </task> 386 nmethod* nm = code(); 387 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", 388 _is_success, nm == NULL ? 0 : nm->content_size(), 389 method->invocation_count()); 390 int bec = method->backedge_count(); 391 if (bec != 0) log->print(" backedge_count='%d'", bec); 392 // Note: "_is_complete" is about to be set, but is not. 393 if (_num_inlined_bytecodes != 0) { 394 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); 395 } 396 log->stamp(); 397 log->end_elem(); 398 log->tail("task"); 399 log->clear_identities(); // next task will have different CI 400 if (log->unflushed_count() > 2000) { 401 log->flush(); 402 } 403 log->mark_file_end(); 404} 405 406 407 408// ------------------------------------------------------------------ 409// CompileQueue::add 410// 411// Add a CompileTask to a CompileQueue 412void CompileQueue::add(CompileTask* task) { 413 assert(lock()->owned_by_self(), "must own lock"); 414 415 task->set_next(NULL); 416 task->set_prev(NULL); 417 418 if (_last == NULL) { 419 // The compile queue is empty. 420 assert(_first == NULL, "queue is empty"); 421 _first = task; 422 _last = task; 423 } else { 424 // Append the task to the queue. 425 assert(_last->next() == NULL, "not last"); 426 _last->set_next(task); 427 task->set_prev(_last); 428 _last = task; 429 } 430 ++_size; 431 432 // Mark the method as being in the compile queue. 433 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); 434 435 if (CIPrintCompileQueue) { 436 print(); 437 } 438 439 if (LogCompilation && xtty != NULL) { 440 task->log_task_queued(); 441 } 442 443 // Notify CompilerThreads that a task is available. 444 lock()->notify_all(); 445} 446 447// ------------------------------------------------------------------ 448// CompileQueue::get 449// 450// Get the next CompileTask from a CompileQueue 451CompileTask* CompileQueue::get() { 452 NMethodSweeper::possibly_sweep(); 453 454 MutexLocker locker(lock()); 455 // Wait for an available CompileTask. 456 while (_first == NULL) { 457 // There is no work to be done right now. Wait. 458 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { 459 // During the emergency sweeping periods, wake up and sweep occasionally 460 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); 461 if (timedout) { 462 MutexUnlocker ul(lock()); 463 // When otherwise not busy, run nmethod sweeping 464 NMethodSweeper::possibly_sweep(); 465 } 466 } else { 467 // During normal operation no need to wake up on timer 468 lock()->wait(); 469 } 470 } 471 CompileTask* task = CompilationPolicy::policy()->select_task(this); 472 remove(task); 473 return task; 474} 475 476void CompileQueue::remove(CompileTask* task) 477{ 478 assert(lock()->owned_by_self(), "must own lock"); 479 if (task->prev() != NULL) { 480 task->prev()->set_next(task->next()); 481 } else { 482 // max is the first element 483 assert(task == _first, "Sanity"); 484 _first = task->next(); 485 } 486 487 if (task->next() != NULL) { 488 task->next()->set_prev(task->prev()); 489 } else { 490 // max is the last element 491 assert(task == _last, "Sanity"); 492 _last = task->prev(); 493 } 494 --_size; 495} 496 497// ------------------------------------------------------------------ 498// CompileQueue::print 499void CompileQueue::print() { 500 tty->print_cr("Contents of %s", name()); 501 tty->print_cr("----------------------"); 502 CompileTask* task = _first; 503 while (task != NULL) { 504 task->print_line(); 505 task = task->next(); 506 } 507 tty->print_cr("----------------------"); 508} 509 510CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { 511 512 _current_method[0] = '\0'; 513 _compile_type = CompileBroker::no_compile; 514 515 if (UsePerfData) { 516 ResourceMark rm; 517 518 // create the thread instance name space string - don't create an 519 // instance subspace if instance is -1 - keeps the adapterThread 520 // counters from having a ".0" namespace. 521 const char* thread_i = (instance == -1) ? thread_name : 522 PerfDataManager::name_space(thread_name, instance); 523 524 525 char* name = PerfDataManager::counter_name(thread_i, "method"); 526 _perf_current_method = 527 PerfDataManager::create_string_variable(SUN_CI, name, 528 cmname_buffer_length, 529 _current_method, CHECK); 530 531 name = PerfDataManager::counter_name(thread_i, "type"); 532 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, 533 PerfData::U_None, 534 (jlong)_compile_type, 535 CHECK); 536 537 name = PerfDataManager::counter_name(thread_i, "time"); 538 _perf_time = PerfDataManager::create_counter(SUN_CI, name, 539 PerfData::U_Ticks, CHECK); 540 541 name = PerfDataManager::counter_name(thread_i, "compiles"); 542 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, 543 PerfData::U_Events, CHECK); 544 } 545} 546 547// ------------------------------------------------------------------ 548// CompileBroker::compilation_init 549// 550// Initialize the Compilation object 551void CompileBroker::compilation_init() { 552 _last_method_compiled[0] = '\0'; 553 554#ifndef SHARK 555 // Set the interface to the current compiler(s). 556 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 557 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 558#ifdef COMPILER1 559 if (c1_count > 0) { 560 _compilers[0] = new Compiler(); 561 } 562#endif // COMPILER1 563 564#ifdef COMPILER2 565 if (c2_count > 0) { 566 _compilers[1] = new C2Compiler(); 567 } 568#endif // COMPILER2 569 570#else // SHARK 571 int c1_count = 0; 572 int c2_count = 1; 573 574 _compilers[1] = new SharkCompiler(); 575#endif // SHARK 576 577 // Initialize the CompileTask free list 578 _task_free_list = NULL; 579 580 // Start the CompilerThreads 581 init_compiler_threads(c1_count, c2_count); 582 // totalTime performance counter is always created as it is required 583 // by the implementation of java.lang.management.CompilationMBean. 584 { 585 EXCEPTION_MARK; 586 _perf_total_compilation = 587 PerfDataManager::create_counter(JAVA_CI, "totalTime", 588 PerfData::U_Ticks, CHECK); 589 } 590 591 592 if (UsePerfData) { 593 594 EXCEPTION_MARK; 595 596 // create the jvmstat performance counters 597 _perf_osr_compilation = 598 PerfDataManager::create_counter(SUN_CI, "osrTime", 599 PerfData::U_Ticks, CHECK); 600 601 _perf_standard_compilation = 602 PerfDataManager::create_counter(SUN_CI, "standardTime", 603 PerfData::U_Ticks, CHECK); 604 605 _perf_total_bailout_count = 606 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 607 PerfData::U_Events, CHECK); 608 609 _perf_total_invalidated_count = 610 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 611 PerfData::U_Events, CHECK); 612 613 _perf_total_compile_count = 614 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 615 PerfData::U_Events, CHECK); 616 _perf_total_osr_compile_count = 617 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 618 PerfData::U_Events, CHECK); 619 620 _perf_total_standard_compile_count = 621 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 622 PerfData::U_Events, CHECK); 623 624 _perf_sum_osr_bytes_compiled = 625 PerfDataManager::create_counter(SUN_CI, "osrBytes", 626 PerfData::U_Bytes, CHECK); 627 628 _perf_sum_standard_bytes_compiled = 629 PerfDataManager::create_counter(SUN_CI, "standardBytes", 630 PerfData::U_Bytes, CHECK); 631 632 _perf_sum_nmethod_size = 633 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 634 PerfData::U_Bytes, CHECK); 635 636 _perf_sum_nmethod_code_size = 637 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 638 PerfData::U_Bytes, CHECK); 639 640 _perf_last_method = 641 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 642 CompilerCounters::cmname_buffer_length, 643 "", CHECK); 644 645 _perf_last_failed_method = 646 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 647 CompilerCounters::cmname_buffer_length, 648 "", CHECK); 649 650 _perf_last_invalidated_method = 651 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 652 CompilerCounters::cmname_buffer_length, 653 "", CHECK); 654 655 _perf_last_compile_type = 656 PerfDataManager::create_variable(SUN_CI, "lastType", 657 PerfData::U_None, 658 (jlong)CompileBroker::no_compile, 659 CHECK); 660 661 _perf_last_compile_size = 662 PerfDataManager::create_variable(SUN_CI, "lastSize", 663 PerfData::U_Bytes, 664 (jlong)CompileBroker::no_compile, 665 CHECK); 666 667 668 _perf_last_failed_type = 669 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 670 PerfData::U_None, 671 (jlong)CompileBroker::no_compile, 672 CHECK); 673 674 _perf_last_invalidated_type = 675 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 676 PerfData::U_None, 677 (jlong)CompileBroker::no_compile, 678 CHECK); 679 } 680 681 _initialized = true; 682} 683 684 685 686// ------------------------------------------------------------------ 687// CompileBroker::make_compiler_thread 688CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { 689 CompilerThread* compiler_thread = NULL; 690 691 klassOop k = 692 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), 693 true, CHECK_0); 694 instanceKlassHandle klass (THREAD, k); 695 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 696 Handle string = java_lang_String::create_from_str(name, CHECK_0); 697 698 // Initialize thread_oop to put it into the system threadGroup 699 Handle thread_group (THREAD, Universe::system_thread_group()); 700 JavaValue result(T_VOID); 701 JavaCalls::call_special(&result, thread_oop, 702 klass, 703 vmSymbols::object_initializer_name(), 704 vmSymbols::threadgroup_string_void_signature(), 705 thread_group, 706 string, 707 CHECK_0); 708 709 { 710 MutexLocker mu(Threads_lock, THREAD); 711 compiler_thread = new CompilerThread(queue, counters); 712 // At this point the new CompilerThread data-races with this startup 713 // thread (which I believe is the primoridal thread and NOT the VM 714 // thread). This means Java bytecodes being executed at startup can 715 // queue compile jobs which will run at whatever default priority the 716 // newly created CompilerThread runs at. 717 718 719 // At this point it may be possible that no osthread was created for the 720 // JavaThread due to lack of memory. We would have to throw an exception 721 // in that case. However, since this must work and we do not allow 722 // exceptions anyway, check and abort if this fails. 723 724 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ 725 vm_exit_during_initialization("java.lang.OutOfMemoryError", 726 "unable to create new native thread"); 727 } 728 729 java_lang_Thread::set_thread(thread_oop(), compiler_thread); 730 731 // Note that this only sets the JavaThread _priority field, which by 732 // definition is limited to Java priorities and not OS priorities. 733 // The os-priority is set in the CompilerThread startup code itself 734 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 735 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler 736 // threads never have their OS priority set. The assumption here is to 737 // enable the Performance group to do flag tuning, figure out a suitable 738 // CompilerThreadPriority, and then remove this 'if' statement (and 739 // comment) and unconditionally set the priority. 740 741 // Compiler Threads should be at the highest Priority 742 if ( CompilerThreadPriority != -1 ) 743 os::set_native_priority( compiler_thread, CompilerThreadPriority ); 744 else 745 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); 746 747 // Note that I cannot call os::set_priority because it expects Java 748 // priorities and I am *explicitly* using OS priorities so that it's 749 // possible to set the compiler thread priority higher than any Java 750 // thread. 751 752 java_lang_Thread::set_daemon(thread_oop()); 753 754 compiler_thread->set_threadObj(thread_oop()); 755 Threads::add(compiler_thread); 756 Thread::start(compiler_thread); 757 } 758 // Let go of Threads_lock before yielding 759 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 760 761 return compiler_thread; 762} 763 764 765// ------------------------------------------------------------------ 766// CompileBroker::init_compiler_threads 767// 768// Initialize the compilation queue 769void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { 770 EXCEPTION_MARK; 771 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 772 if (c2_compiler_count > 0) { 773 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); 774 } 775 if (c1_compiler_count > 0) { 776 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); 777 } 778 779 int compiler_count = c1_compiler_count + c2_compiler_count; 780 781 _method_threads = 782 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); 783 784 char name_buffer[256]; 785 for (int i = 0; i < c2_compiler_count; i++) { 786 // Create a name for our thread. 787 sprintf(name_buffer, "C2 CompilerThread%d", i); 788 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 789 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); 790 _method_threads->append(new_thread); 791 } 792 793 for (int i = c2_compiler_count; i < compiler_count; i++) { 794 // Create a name for our thread. 795 sprintf(name_buffer, "C1 CompilerThread%d", i); 796 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 797 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); 798 _method_threads->append(new_thread); 799 } 800 801 if (UsePerfData) { 802 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, 803 compiler_count, CHECK); 804 } 805} 806 807// ------------------------------------------------------------------ 808// CompileBroker::is_idle 809bool CompileBroker::is_idle() { 810 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { 811 return false; 812 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { 813 return false; 814 } else { 815 int num_threads = _method_threads->length(); 816 for (int i=0; i<num_threads; i++) { 817 if (_method_threads->at(i)->task() != NULL) { 818 return false; 819 } 820 } 821 822 // No pending or active compilations. 823 return true; 824 } 825} 826 827 828// ------------------------------------------------------------------ 829// CompileBroker::compile_method 830// 831// Request compilation of a method. 832void CompileBroker::compile_method_base(methodHandle method, 833 int osr_bci, 834 int comp_level, 835 methodHandle hot_method, 836 int hot_count, 837 const char* comment, 838 TRAPS) { 839 // do nothing if compiler thread(s) is not available 840 if (!_initialized ) { 841 return; 842 } 843 844 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 845 assert(method->method_holder()->klass_part()->oop_is_instance(), 846 "sanity check"); 847 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), 848 "method holder must be initialized"); 849 850 if (CIPrintRequests) { 851 tty->print("request: "); 852 method->print_short_name(tty); 853 if (osr_bci != InvocationEntryBci) { 854 tty->print(" osr_bci: %d", osr_bci); 855 } 856 tty->print(" comment: %s count: %d", comment, hot_count); 857 if (!hot_method.is_null()) { 858 tty->print(" hot: "); 859 if (hot_method() != method()) { 860 hot_method->print_short_name(tty); 861 } else { 862 tty->print("yes"); 863 } 864 } 865 tty->cr(); 866 } 867 868 // A request has been made for compilation. Before we do any 869 // real work, check to see if the method has been compiled 870 // in the meantime with a definitive result. 871 if (compilation_is_complete(method, osr_bci, comp_level)) { 872 return; 873 } 874 875 876 // If this method is already in the compile queue, then 877 // we do not block the current thread. 878 if (compilation_is_in_queue(method, osr_bci)) { 879 // We may want to decay our counter a bit here to prevent 880 // multiple denied requests for compilation. This is an 881 // open compilation policy issue. Note: The other possibility, 882 // in the case that this is a blocking compile request, is to have 883 // all subsequent blocking requesters wait for completion of 884 // ongoing compiles. Note that in this case we'll need a protocol 885 // for freeing the associated compile tasks. [Or we could have 886 // a single static monitor on which all these waiters sleep.] 887 return; 888 } 889 890 // Outputs from the following MutexLocker block: 891 CompileTask* task = NULL; 892 bool blocking = false; 893 CompileQueue* queue = compile_queue(comp_level); 894 895 // Acquire our lock. 896 { 897 MutexLocker locker(queue->lock(), THREAD); 898 899 // Make sure the method has not slipped into the queues since 900 // last we checked; note that those checks were "fast bail-outs". 901 // Here we need to be more careful, see 14012000 below. 902 if (compilation_is_in_queue(method, osr_bci)) { 903 return; 904 } 905 906 // We need to check again to see if the compilation has 907 // completed. A previous compilation may have registered 908 // some result. 909 if (compilation_is_complete(method, osr_bci, comp_level)) { 910 return; 911 } 912 913 // We now know that this compilation is not pending, complete, 914 // or prohibited. Assign a compile_id to this compilation 915 // and check to see if it is in our [Start..Stop) range. 916 uint compile_id = assign_compile_id(method, osr_bci); 917 if (compile_id == 0) { 918 // The compilation falls outside the allowed range. 919 return; 920 } 921 922 // Should this thread wait for completion of the compile? 923 blocking = is_compile_blocking(method, osr_bci); 924 925 // We will enter the compilation in the queue. 926 // 14012000: Note that this sets the queued_for_compile bits in 927 // the target method. We can now reason that a method cannot be 928 // queued for compilation more than once, as follows: 929 // Before a thread queues a task for compilation, it first acquires 930 // the compile queue lock, then checks if the method's queued bits 931 // are set or it has already been compiled. Thus there can not be two 932 // instances of a compilation task for the same method on the 933 // compilation queue. Consider now the case where the compilation 934 // thread has already removed a task for that method from the queue 935 // and is in the midst of compiling it. In this case, the 936 // queued_for_compile bits must be set in the method (and these 937 // will be visible to the current thread, since the bits were set 938 // under protection of the compile queue lock, which we hold now. 939 // When the compilation completes, the compiler thread first sets 940 // the compilation result and then clears the queued_for_compile 941 // bits. Neither of these actions are protected by a barrier (or done 942 // under the protection of a lock), so the only guarantee we have 943 // (on machines with TSO (Total Store Order)) is that these values 944 // will update in that order. As a result, the only combinations of 945 // these bits that the current thread will see are, in temporal order: 946 // <RESULT, QUEUE> : 947 // <0, 1> : in compile queue, but not yet compiled 948 // <1, 1> : compiled but queue bit not cleared 949 // <1, 0> : compiled and queue bit cleared 950 // Because we first check the queue bits then check the result bits, 951 // we are assured that we cannot introduce a duplicate task. 952 // Note that if we did the tests in the reverse order (i.e. check 953 // result then check queued bit), we could get the result bit before 954 // the compilation completed, and the queue bit after the compilation 955 // completed, and end up introducing a "duplicate" (redundant) task. 956 // In that case, the compiler thread should first check if a method 957 // has already been compiled before trying to compile it. 958 // NOTE: in the event that there are multiple compiler threads and 959 // there is de-optimization/recompilation, things will get hairy, 960 // and in that case it's best to protect both the testing (here) of 961 // these bits, and their updating (here and elsewhere) under a 962 // common lock. 963 task = create_compile_task(queue, 964 compile_id, method, 965 osr_bci, comp_level, 966 hot_method, hot_count, comment, 967 blocking); 968 } 969 970 if (blocking) { 971 wait_for_completion(task); 972 } 973} 974 975 976nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, 977 int comp_level, 978 methodHandle hot_method, int hot_count, 979 const char* comment, TRAPS) { 980 // make sure arguments make sense 981 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); 982 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 983 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 984 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); 985 986 if (!TieredCompilation) { 987 comp_level = CompLevel_highest_tier; 988 } 989 990 // return quickly if possible 991 992 // lock, make sure that the compilation 993 // isn't prohibited in a straightforward way. 994 995 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { 996 return NULL; 997 } 998 999 if (osr_bci == InvocationEntryBci) { 1000 // standard compilation 1001 nmethod* method_code = method->code(); 1002 if (method_code != NULL) { 1003 if (compilation_is_complete(method, osr_bci, comp_level)) { 1004 return method_code; 1005 } 1006 } 1007 if (method->is_not_compilable(comp_level)) return NULL; 1008 1009 if (UseCodeCacheFlushing) { 1010 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); 1011 if (saved != NULL) { 1012 method->set_code(method, saved); 1013 return saved; 1014 } 1015 } 1016 1017 } else { 1018 // osr compilation 1019#ifndef TIERED 1020 // seems like an assert of dubious value 1021 assert(comp_level == CompLevel_highest_tier, 1022 "all OSR compiles are assumed to be at a single compilation lavel"); 1023#endif // TIERED 1024 // We accept a higher level osr method 1025 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1026 if (nm != NULL) return nm; 1027 if (method->is_not_osr_compilable()) return NULL; 1028 } 1029 1030 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1031 // some prerequisites that are compiler specific 1032 if (compiler(comp_level)->is_c2()) { 1033 method->constants()->resolve_string_constants(CHECK_0); 1034 // Resolve all classes seen in the signature of the method 1035 // we are compiling. 1036 methodOopDesc::load_signature_classes(method, CHECK_0); 1037 } 1038 1039 // If the method is native, do the lookup in the thread requesting 1040 // the compilation. Native lookups can load code, which is not 1041 // permitted during compilation. 1042 // 1043 // Note: A native method implies non-osr compilation which is 1044 // checked with an assertion at the entry of this method. 1045 if (method->is_native()) { 1046 bool in_base_library; 1047 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1048 if (HAS_PENDING_EXCEPTION) { 1049 // In case of an exception looking up the method, we just forget 1050 // about it. The interpreter will kick-in and throw the exception. 1051 method->set_not_compilable(); // implies is_not_osr_compilable() 1052 CLEAR_PENDING_EXCEPTION; 1053 return NULL; 1054 } 1055 assert(method->has_native_function(), "must have native code by now"); 1056 } 1057 1058 // RedefineClasses() has replaced this method; just return 1059 if (method->is_old()) { 1060 return NULL; 1061 } 1062 1063 // JVMTI -- post_compile_event requires jmethod_id() that may require 1064 // a lock the compiling thread can not acquire. Prefetch it here. 1065 if (JvmtiExport::should_post_compiled_method_load()) { 1066 method->jmethod_id(); 1067 } 1068 1069 // If the compiler is shut off due to code cache flushing or otherwise, 1070 // fail out now so blocking compiles dont hang the java thread 1071 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { 1072 CompilationPolicy::policy()->delay_compilation(method()); 1073 return NULL; 1074 } 1075 1076 // do the compilation 1077 if (method->is_native()) { 1078 if (!PreferInterpreterNativeStubs) { 1079 (void) AdapterHandlerLibrary::create_native_wrapper(method); 1080 } else { 1081 return NULL; 1082 } 1083 } else { 1084 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); 1085 } 1086 1087 // return requested nmethod 1088 // We accept a higher level osr method 1089 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1090} 1091 1092 1093// ------------------------------------------------------------------ 1094// CompileBroker::compilation_is_complete 1095// 1096// See if compilation of this method is already complete. 1097bool CompileBroker::compilation_is_complete(methodHandle method, 1098 int osr_bci, 1099 int comp_level) { 1100 bool is_osr = (osr_bci != standard_entry_bci); 1101 if (is_osr) { 1102 if (method->is_not_osr_compilable()) { 1103 return true; 1104 } else { 1105 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1106 return (result != NULL); 1107 } 1108 } else { 1109 if (method->is_not_compilable(comp_level)) { 1110 return true; 1111 } else { 1112 nmethod* result = method->code(); 1113 if (result == NULL) return false; 1114 return comp_level == result->comp_level(); 1115 } 1116 } 1117} 1118 1119 1120// ------------------------------------------------------------------ 1121// CompileBroker::compilation_is_in_queue 1122// 1123// See if this compilation is already requested. 1124// 1125// Implementation note: there is only a single "is in queue" bit 1126// for each method. This means that the check below is overly 1127// conservative in the sense that an osr compilation in the queue 1128// will block a normal compilation from entering the queue (and vice 1129// versa). This can be remedied by a full queue search to disambiguate 1130// cases. If it is deemed profitible, this may be done. 1131bool CompileBroker::compilation_is_in_queue(methodHandle method, 1132 int osr_bci) { 1133 return method->queued_for_compilation(); 1134} 1135 1136// ------------------------------------------------------------------ 1137// CompileBroker::compilation_is_prohibited 1138// 1139// See if this compilation is not allowed. 1140bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { 1141 bool is_native = method->is_native(); 1142 // Some compilers may not support the compilation of natives. 1143 if (is_native && 1144 (!CICompileNatives || !compiler(comp_level)->supports_native())) { 1145 method->set_not_compilable_quietly(comp_level); 1146 return true; 1147 } 1148 1149 bool is_osr = (osr_bci != standard_entry_bci); 1150 // Some compilers may not support on stack replacement. 1151 if (is_osr && 1152 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { 1153 method->set_not_osr_compilable(); 1154 return true; 1155 } 1156 1157 // The method may be explicitly excluded by the user. 1158 bool quietly; 1159 if (CompilerOracle::should_exclude(method, quietly)) { 1160 if (!quietly) { 1161 // This does not happen quietly... 1162 ResourceMark rm; 1163 tty->print("### Excluding %s:%s", 1164 method->is_native() ? "generation of native wrapper" : "compile", 1165 (method->is_static() ? " static" : "")); 1166 method->print_short_name(tty); 1167 tty->cr(); 1168 } 1169 method->set_not_compilable_quietly(); 1170 } 1171 1172 return false; 1173} 1174 1175 1176// ------------------------------------------------------------------ 1177// CompileBroker::assign_compile_id 1178// 1179// Assign a serialized id number to this compilation request. If the 1180// number falls out of the allowed range, return a 0. OSR 1181// compilations may be numbered separately from regular compilations 1182// if certain debugging flags are used. 1183uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { 1184 assert(MethodCompileQueue_lock->owner() == Thread::current(), 1185 "must hold the compilation queue lock"); 1186 bool is_osr = (osr_bci != standard_entry_bci); 1187 assert(!method->is_native(), "no longer compile natives"); 1188 uint id; 1189 if (CICountOSR && is_osr) { 1190 id = ++_osr_compilation_id; 1191 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { 1192 return id; 1193 } 1194 } else { 1195 id = ++_compilation_id; 1196 if ((uint)CIStart <= id && id < (uint)CIStop) { 1197 return id; 1198 } 1199 } 1200 1201 // Method was not in the appropriate compilation range. 1202 method->set_not_compilable_quietly(); 1203 return 0; 1204} 1205 1206 1207// ------------------------------------------------------------------ 1208// CompileBroker::is_compile_blocking 1209// 1210// Should the current thread be blocked until this compilation request 1211// has been fulfilled? 1212bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { 1213 return !BackgroundCompilation; 1214} 1215 1216 1217// ------------------------------------------------------------------ 1218// CompileBroker::preload_classes 1219void CompileBroker::preload_classes(methodHandle method, TRAPS) { 1220 // Move this code over from c1_Compiler.cpp 1221 ShouldNotReachHere(); 1222} 1223 1224 1225// ------------------------------------------------------------------ 1226// CompileBroker::create_compile_task 1227// 1228// Create a CompileTask object representing the current request for 1229// compilation. Add this task to the queue. 1230CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1231 int compile_id, 1232 methodHandle method, 1233 int osr_bci, 1234 int comp_level, 1235 methodHandle hot_method, 1236 int hot_count, 1237 const char* comment, 1238 bool blocking) { 1239 CompileTask* new_task = allocate_task(); 1240 new_task->initialize(compile_id, method, osr_bci, comp_level, 1241 hot_method, hot_count, comment, 1242 blocking); 1243 queue->add(new_task); 1244 return new_task; 1245} 1246 1247 1248// ------------------------------------------------------------------ 1249// CompileBroker::allocate_task 1250// 1251// Allocate a CompileTask, from the free list if possible. 1252CompileTask* CompileBroker::allocate_task() { 1253 MutexLocker locker(CompileTaskAlloc_lock); 1254 CompileTask* task = NULL; 1255 if (_task_free_list != NULL) { 1256 task = _task_free_list; 1257 _task_free_list = task->next(); 1258 task->set_next(NULL); 1259 } else { 1260 task = new CompileTask(); 1261 task->set_next(NULL); 1262 } 1263 return task; 1264} 1265 1266 1267// ------------------------------------------------------------------ 1268// CompileBroker::free_task 1269// 1270// Add a task to the free list. 1271void CompileBroker::free_task(CompileTask* task) { 1272 MutexLocker locker(CompileTaskAlloc_lock); 1273 task->free(); 1274 task->set_next(_task_free_list); 1275 _task_free_list = task; 1276} 1277 1278 1279// ------------------------------------------------------------------ 1280// CompileBroker::wait_for_completion 1281// 1282// Wait for the given method CompileTask to complete. 1283void CompileBroker::wait_for_completion(CompileTask* task) { 1284 if (CIPrintCompileQueue) { 1285 tty->print_cr("BLOCKING FOR COMPILE"); 1286 } 1287 1288 assert(task->is_blocking(), "can only wait on blocking task"); 1289 1290 JavaThread *thread = JavaThread::current(); 1291 thread->set_blocked_on_compilation(true); 1292 1293 methodHandle method(thread, 1294 (methodOop)JNIHandles::resolve(task->method_handle())); 1295 { 1296 MutexLocker waiter(task->lock(), thread); 1297 1298 while (!task->is_complete()) 1299 task->lock()->wait(); 1300 } 1301 // It is harmless to check this status without the lock, because 1302 // completion is a stable property (until the task object is recycled). 1303 assert(task->is_complete(), "Compilation should have completed"); 1304 assert(task->code_handle() == NULL, "must be reset"); 1305 1306 thread->set_blocked_on_compilation(false); 1307 1308 // By convention, the waiter is responsible for recycling a 1309 // blocking CompileTask. Since there is only one waiter ever 1310 // waiting on a CompileTask, we know that no one else will 1311 // be using this CompileTask; we can free it. 1312 free_task(task); 1313} 1314 1315// ------------------------------------------------------------------ 1316// CompileBroker::compiler_thread_loop 1317// 1318// The main loop run by a CompilerThread. 1319void CompileBroker::compiler_thread_loop() { 1320 CompilerThread* thread = CompilerThread::current(); 1321 CompileQueue* queue = thread->queue(); 1322 1323 // For the thread that initializes the ciObjectFactory 1324 // this resource mark holds all the shared objects 1325 ResourceMark rm; 1326 1327 // First thread to get here will initialize the compiler interface 1328 1329 if (!ciObjectFactory::is_initialized()) { 1330 ASSERT_IN_VM; 1331 MutexLocker only_one (CompileThread_lock, thread); 1332 if (!ciObjectFactory::is_initialized()) { 1333 ciObjectFactory::initialize(); 1334 } 1335 } 1336 1337 // Open a log. 1338 if (LogCompilation) { 1339 init_compiler_thread_log(); 1340 } 1341 CompileLog* log = thread->log(); 1342 if (log != NULL) { 1343 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", 1344 os::current_thread_id(), 1345 os::current_process_id()); 1346 log->stamp(); 1347 log->end_elem(); 1348 } 1349 1350 while (true) { 1351 { 1352 // We need this HandleMark to avoid leaking VM handles. 1353 HandleMark hm(thread); 1354 1355 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) { 1356 // the code cache is really full 1357 handle_full_code_cache(); 1358 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { 1359 // Attempt to start cleaning the code cache while there is still a little headroom 1360 NMethodSweeper::handle_full_code_cache(false); 1361 } 1362 1363 CompileTask* task = queue->get(); 1364 1365 // Give compiler threads an extra quanta. They tend to be bursty and 1366 // this helps the compiler to finish up the job. 1367 if( CompilerThreadHintNoPreempt ) 1368 os::hint_no_preempt(); 1369 1370 // trace per thread time and compile statistics 1371 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); 1372 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); 1373 1374 // Assign the task to the current thread. Mark this compilation 1375 // thread as active for the profiler. 1376 CompileTaskWrapper ctw(task); 1377 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1378 task->set_code_handle(&result_handle); 1379 methodHandle method(thread, 1380 (methodOop)JNIHandles::resolve(task->method_handle())); 1381 1382 // Never compile a method if breakpoints are present in it 1383 if (method()->number_of_breakpoints() == 0) { 1384 // Compile the method. 1385 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1386#ifdef COMPILER1 1387 // Allow repeating compilations for the purpose of benchmarking 1388 // compile speed. This is not useful for customers. 1389 if (CompilationRepeat != 0) { 1390 int compile_count = CompilationRepeat; 1391 while (compile_count > 0) { 1392 invoke_compiler_on_method(task); 1393 nmethod* nm = method->code(); 1394 if (nm != NULL) { 1395 nm->make_zombie(); 1396 method->clear_code(); 1397 } 1398 compile_count--; 1399 } 1400 } 1401#endif /* COMPILER1 */ 1402 invoke_compiler_on_method(task); 1403 } else { 1404 // After compilation is disabled, remove remaining methods from queue 1405 method->clear_queued_for_compilation(); 1406 } 1407 } 1408 } 1409 } 1410} 1411 1412 1413// ------------------------------------------------------------------ 1414// CompileBroker::init_compiler_thread_log 1415// 1416// Set up state required by +LogCompilation. 1417void CompileBroker::init_compiler_thread_log() { 1418 CompilerThread* thread = CompilerThread::current(); 1419 char fileBuf[4*K]; 1420 FILE* fp = NULL; 1421 char* file = NULL; 1422 intx thread_id = os::current_thread_id(); 1423 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1424 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1425 if (dir == NULL) { 1426 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", 1427 thread_id, os::current_process_id()); 1428 } else { 1429 jio_snprintf(fileBuf, sizeof(fileBuf), 1430 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1431 os::file_separator(), thread_id, os::current_process_id()); 1432 } 1433 fp = fopen(fileBuf, "at"); 1434 if (fp != NULL) { 1435 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); 1436 strcpy(file, fileBuf); 1437 break; 1438 } 1439 } 1440 if (fp == NULL) { 1441 warning("Cannot open log file: %s", fileBuf); 1442 } else { 1443 if (LogCompilation && Verbose) 1444 tty->print_cr("Opening compilation log %s", file); 1445 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); 1446 thread->init_log(log); 1447 1448 if (xtty != NULL) { 1449 ttyLocker ttyl; 1450 1451 // Record any per thread log files 1452 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); 1453 } 1454 } 1455} 1456 1457// ------------------------------------------------------------------ 1458// CompileBroker::set_should_block 1459// 1460// Set _should_block. 1461// Call this from the VM, with Threads_lock held and a safepoint requested. 1462void CompileBroker::set_should_block() { 1463 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1464 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1465#ifndef PRODUCT 1466 if (PrintCompilation && (Verbose || WizardMode)) 1467 tty->print_cr("notifying compiler thread pool to block"); 1468#endif 1469 _should_block = true; 1470} 1471 1472// ------------------------------------------------------------------ 1473// CompileBroker::maybe_block 1474// 1475// Call this from the compiler at convenient points, to poll for _should_block. 1476void CompileBroker::maybe_block() { 1477 if (_should_block) { 1478#ifndef PRODUCT 1479 if (PrintCompilation && (Verbose || WizardMode)) 1480 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); 1481#endif 1482 ThreadInVMfromNative tivfn(JavaThread::current()); 1483 } 1484} 1485 1486 1487// ------------------------------------------------------------------ 1488// CompileBroker::invoke_compiler_on_method 1489// 1490// Compile a method. 1491// 1492void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1493 if (PrintCompilation) { 1494 ResourceMark rm; 1495 task->print_line(); 1496 } 1497 elapsedTimer time; 1498 1499 CompilerThread* thread = CompilerThread::current(); 1500 ResourceMark rm(thread); 1501 1502 // Common flags. 1503 uint compile_id = task->compile_id(); 1504 int osr_bci = task->osr_bci(); 1505 bool is_osr = (osr_bci != standard_entry_bci); 1506 bool should_log = (thread->log() != NULL); 1507 bool should_break = false; 1508 { 1509 // create the handle inside it's own block so it can't 1510 // accidentally be referenced once the thread transitions to 1511 // native. The NoHandleMark before the transition should catch 1512 // any cases where this occurs in the future. 1513 methodHandle method(thread, 1514 (methodOop)JNIHandles::resolve(task->method_handle())); 1515 should_break = check_break_at(method, compile_id, is_osr); 1516 if (should_log && !CompilerOracle::should_log(method)) { 1517 should_log = false; 1518 } 1519 assert(!method->is_native(), "no longer compile natives"); 1520 1521 // Save information about this method in case of failure. 1522 set_last_compile(thread, method, is_osr, task->comp_level()); 1523 1524 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); 1525 } 1526 1527 // Allocate a new set of JNI handles. 1528 push_jni_handle_block(); 1529 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); 1530 int compilable = ciEnv::MethodCompilable; 1531 { 1532 int system_dictionary_modification_counter; 1533 { 1534 MutexLocker locker(Compile_lock, thread); 1535 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1536 } 1537 1538 NoHandleMark nhm; 1539 ThreadToNativeFromVM ttn(thread); 1540 1541 ciEnv ci_env(task, system_dictionary_modification_counter); 1542 if (should_break) { 1543 ci_env.set_break_at_compile(true); 1544 } 1545 if (should_log) { 1546 ci_env.set_log(thread->log()); 1547 } 1548 assert(thread->env() == &ci_env, "set by ci_env"); 1549 // The thread-env() field is cleared in ~CompileTaskWrapper. 1550 1551 // Cache Jvmti state 1552 ci_env.cache_jvmti_state(); 1553 1554 // Cache DTrace flags 1555 ci_env.cache_dtrace_flags(); 1556 1557 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1558 1559 TraceTime t1("compilation", &time); 1560 1561 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); 1562 1563 if (!ci_env.failing() && task->code() == NULL) { 1564 //assert(false, "compiler should always document failure"); 1565 // The compiler elected, without comment, not to register a result. 1566 // Do not attempt further compilations of this method. 1567 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1568 } 1569 1570 if (ci_env.failing()) { 1571 // Copy this bit to the enclosing block: 1572 compilable = ci_env.compilable(); 1573 if (PrintCompilation) { 1574 const char* reason = ci_env.failure_reason(); 1575 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1576 tty->print_cr("%3d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); 1577 } else if (compilable == ciEnv::MethodCompilable_never) { 1578 tty->print_cr("%3d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); 1579 } else if (compilable == ciEnv::MethodCompilable) { 1580 tty->print_cr("%3d COMPILE SKIPPED: %s", compile_id, reason); 1581 } 1582 } 1583 } else { 1584 task->mark_success(); 1585 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); 1586 } 1587 } 1588 pop_jni_handle_block(); 1589 1590 methodHandle method(thread, 1591 (methodOop)JNIHandles::resolve(task->method_handle())); 1592 1593 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); 1594 1595 collect_statistics(thread, time, task); 1596 1597 if (compilable == ciEnv::MethodCompilable_never) { 1598 if (is_osr) { 1599 method->set_not_osr_compilable(); 1600 } else { 1601 method->set_not_compilable_quietly(); 1602 } 1603 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1604 method->set_not_compilable_quietly(task->comp_level()); 1605 } 1606 1607 // Note that the queued_for_compilation bits are cleared without 1608 // protection of a mutex. [They were set by the requester thread, 1609 // when adding the task to the complie queue -- at which time the 1610 // compile queue lock was held. Subsequently, we acquired the compile 1611 // queue lock to get this task off the compile queue; thus (to belabour 1612 // the point somewhat) our clearing of the bits must be occurring 1613 // only after the setting of the bits. See also 14012000 above. 1614 method->clear_queued_for_compilation(); 1615 1616#ifdef ASSERT 1617 if (CollectedHeap::fired_fake_oom()) { 1618 // The current compile received a fake OOM during compilation so 1619 // go ahead and exit the VM since the test apparently succeeded 1620 tty->print_cr("*** Shutting down VM after successful fake OOM"); 1621 vm_exit(0); 1622 } 1623#endif 1624} 1625 1626// ------------------------------------------------------------------ 1627// CompileBroker::handle_full_code_cache 1628// 1629// The CodeCache is full. Print out warning and disable compilation or 1630// try code cache cleaning so compilation can continue later. 1631void CompileBroker::handle_full_code_cache() { 1632 UseInterpreter = true; 1633 if (UseCompiler || AlwaysCompileLoopMethods ) { 1634 if (xtty != NULL) { 1635 xtty->begin_elem("code_cache_full"); 1636 xtty->stamp(); 1637 xtty->end_elem(); 1638 } 1639 warning("CodeCache is full. Compiler has been disabled."); 1640 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); 1641#ifndef PRODUCT 1642 if (CompileTheWorld || ExitOnFullCodeCache) { 1643 before_exit(JavaThread::current()); 1644 exit_globals(); // will delete tty 1645 vm_direct_exit(CompileTheWorld ? 0 : 1); 1646 } 1647#endif 1648 if (UseCodeCacheFlushing) { 1649 NMethodSweeper::handle_full_code_cache(true); 1650 } else { 1651 UseCompiler = false; 1652 AlwaysCompileLoopMethods = false; 1653 } 1654 } 1655} 1656 1657// ------------------------------------------------------------------ 1658// CompileBroker::set_last_compile 1659// 1660// Record this compilation for debugging purposes. 1661void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { 1662 ResourceMark rm; 1663 char* method_name = method->name()->as_C_string(); 1664 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 1665 char current_method[CompilerCounters::cmname_buffer_length]; 1666 size_t maxLen = CompilerCounters::cmname_buffer_length; 1667 1668 if (UsePerfData) { 1669 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); 1670 1671 size_t s1len = strlen(class_name); 1672 size_t s2len = strlen(method_name); 1673 1674 // check if we need to truncate the string 1675 if (s1len + s2len + 2 > maxLen) { 1676 1677 // the strategy is to lop off the leading characters of the 1678 // class name and the trailing characters of the method name. 1679 1680 if (s2len + 2 > maxLen) { 1681 // lop of the entire class name string, let snprintf handle 1682 // truncation of the method name. 1683 class_name += s1len; // null string 1684 } 1685 else { 1686 // lop off the extra characters from the front of the class name 1687 class_name += ((s1len + s2len + 2) - maxLen); 1688 } 1689 } 1690 1691 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 1692 } 1693 1694 if (CICountOSR && is_osr) { 1695 _last_compile_type = osr_compile; 1696 } else { 1697 _last_compile_type = normal_compile; 1698 } 1699 _last_compile_level = comp_level; 1700 1701 if (UsePerfData) { 1702 CompilerCounters* counters = thread->counters(); 1703 counters->set_current_method(current_method); 1704 counters->set_compile_type((jlong)_last_compile_type); 1705 } 1706} 1707 1708 1709// ------------------------------------------------------------------ 1710// CompileBroker::push_jni_handle_block 1711// 1712// Push on a new block of JNI handles. 1713void CompileBroker::push_jni_handle_block() { 1714 JavaThread* thread = JavaThread::current(); 1715 1716 // Allocate a new block for JNI handles. 1717 // Inlined code from jni_PushLocalFrame() 1718 JNIHandleBlock* java_handles = thread->active_handles(); 1719 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 1720 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 1721 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 1722 thread->set_active_handles(compile_handles); 1723} 1724 1725 1726// ------------------------------------------------------------------ 1727// CompileBroker::pop_jni_handle_block 1728// 1729// Pop off the current block of JNI handles. 1730void CompileBroker::pop_jni_handle_block() { 1731 JavaThread* thread = JavaThread::current(); 1732 1733 // Release our JNI handle block 1734 JNIHandleBlock* compile_handles = thread->active_handles(); 1735 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 1736 thread->set_active_handles(java_handles); 1737 compile_handles->set_pop_frame_link(NULL); 1738 JNIHandleBlock::release_block(compile_handles, thread); // may block 1739} 1740 1741 1742// ------------------------------------------------------------------ 1743// CompileBroker::check_break_at 1744// 1745// Should the compilation break at the current compilation. 1746bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { 1747 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { 1748 return true; 1749 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling 1750 return true; 1751 } else { 1752 return (compile_id == CIBreakAt); 1753 } 1754} 1755 1756// ------------------------------------------------------------------ 1757// CompileBroker::collect_statistics 1758// 1759// Collect statistics about the compilation. 1760 1761void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 1762 bool success = task->is_success(); 1763 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); 1764 uint compile_id = task->compile_id(); 1765 bool is_osr = (task->osr_bci() != standard_entry_bci); 1766 nmethod* code = task->code(); 1767 CompilerCounters* counters = thread->counters(); 1768 1769 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 1770 MutexLocker locker(CompileStatistics_lock); 1771 1772 // _perf variables are production performance counters which are 1773 // updated regardless of the setting of the CITime and CITimeEach flags 1774 // 1775 if (!success) { 1776 _total_bailout_count++; 1777 if (UsePerfData) { 1778 _perf_last_failed_method->set_value(counters->current_method()); 1779 _perf_last_failed_type->set_value(counters->compile_type()); 1780 _perf_total_bailout_count->inc(); 1781 } 1782 } else if (code == NULL) { 1783 if (UsePerfData) { 1784 _perf_last_invalidated_method->set_value(counters->current_method()); 1785 _perf_last_invalidated_type->set_value(counters->compile_type()); 1786 _perf_total_invalidated_count->inc(); 1787 } 1788 _total_invalidated_count++; 1789 } else { 1790 // Compilation succeeded 1791 1792 // update compilation ticks - used by the implementation of 1793 // java.lang.management.CompilationMBean 1794 _perf_total_compilation->inc(time.ticks()); 1795 1796 if (CITime) { 1797 _t_total_compilation.add(time); 1798 if (is_osr) { 1799 _t_osr_compilation.add(time); 1800 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1801 } else { 1802 _t_standard_compilation.add(time); 1803 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1804 } 1805 } 1806 1807 if (UsePerfData) { 1808 // save the name of the last method compiled 1809 _perf_last_method->set_value(counters->current_method()); 1810 _perf_last_compile_type->set_value(counters->compile_type()); 1811 _perf_last_compile_size->set_value(method->code_size() + 1812 task->num_inlined_bytecodes()); 1813 if (is_osr) { 1814 _perf_osr_compilation->inc(time.ticks()); 1815 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1816 } else { 1817 _perf_standard_compilation->inc(time.ticks()); 1818 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1819 } 1820 } 1821 1822 if (CITimeEach) { 1823 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 1824 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 1825 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 1826 } 1827 1828 // Collect counts of successful compilations 1829 _sum_nmethod_size += code->total_size(); 1830 _sum_nmethod_code_size += code->insts_size(); 1831 _total_compile_count++; 1832 1833 if (UsePerfData) { 1834 _perf_sum_nmethod_size->inc( code->total_size()); 1835 _perf_sum_nmethod_code_size->inc(code->insts_size()); 1836 _perf_total_compile_count->inc(); 1837 } 1838 1839 if (is_osr) { 1840 if (UsePerfData) _perf_total_osr_compile_count->inc(); 1841 _total_osr_compile_count++; 1842 } else { 1843 if (UsePerfData) _perf_total_standard_compile_count->inc(); 1844 _total_standard_compile_count++; 1845 } 1846 } 1847 // set the current method for the thread to null 1848 if (UsePerfData) counters->set_current_method(""); 1849} 1850 1851 1852 1853void CompileBroker::print_times() { 1854 tty->cr(); 1855 tty->print_cr("Accumulated compiler times (for compiled methods only)"); 1856 tty->print_cr("------------------------------------------------"); 1857 //0000000000111111111122222222223333333333444444444455555555556666666666 1858 //0123456789012345678901234567890123456789012345678901234567890123456789 1859 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); 1860 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", 1861 CompileBroker::_t_standard_compilation.seconds(), 1862 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); 1863 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); 1864 1865 if (compiler(CompLevel_simple) != NULL) { 1866 compiler(CompLevel_simple)->print_timers(); 1867 } 1868 if (compiler(CompLevel_full_optimization) != NULL) { 1869 compiler(CompLevel_full_optimization)->print_timers(); 1870 } 1871 tty->cr(); 1872 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; 1873 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); 1874 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); 1875 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); 1876 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); 1877 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); 1878 tty->cr(); 1879 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); 1880 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); 1881} 1882 1883 1884// Debugging output for failure 1885void CompileBroker::print_last_compile() { 1886 if ( _last_compile_level != CompLevel_none && 1887 compiler(_last_compile_level) != NULL && 1888 _last_method_compiled != NULL && 1889 _last_compile_type != no_compile) { 1890 if (_last_compile_type == osr_compile) { 1891 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 1892 _osr_compilation_id, _last_compile_level, _last_method_compiled); 1893 } else { 1894 tty->print_cr("Last parse: %d+++(%d) %s", 1895 _compilation_id, _last_compile_level, _last_method_compiled); 1896 } 1897 } 1898} 1899 1900 1901void CompileBroker::print_compiler_threads_on(outputStream* st) { 1902#ifndef PRODUCT 1903 st->print_cr("Compiler thread printing unimplemented."); 1904 st->cr(); 1905#endif 1906} 1907