1 /* 2 * Copyright (c) 1999, 2016, 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/symbolTable.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/codeCache.hpp" 30 #include "code/dependencyContext.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/compileLog.hpp" 33 #include "compiler/compilerOracle.hpp" 34 #include "compiler/directivesParser.hpp" 35 #include "gc/shared/referencePendingListLocker.hpp" 36 #include "interpreter/linkResolver.hpp" 37 #include "memory/allocation.inline.hpp" 38 #include "memory/resourceArea.hpp" 39 #include "oops/methodData.hpp" 40 #include "oops/method.hpp" 41 #include "oops/oop.inline.hpp" 42 #include "prims/nativeLookup.hpp" 43 #include "prims/whitebox.hpp" 44 #include "runtime/arguments.hpp" 45 #include "runtime/atomic.inline.hpp" 46 #include "runtime/compilationPolicy.hpp" 47 #include "runtime/init.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/javaCalls.hpp" 50 #include "runtime/os.hpp" 51 #include "runtime/sharedRuntime.hpp" 52 #include "runtime/sweeper.hpp" 53 #include "runtime/timerTrace.hpp" 54 #include "trace/tracing.hpp" 55 #include "utilities/dtrace.hpp" 56 #include "utilities/events.hpp" 57 #ifdef COMPILER1 58 #include "c1/c1_Compiler.hpp" 59 #endif 60 #if INCLUDE_JVMCI 61 #include "jvmci/jvmciCompiler.hpp" 62 #include "jvmci/jvmciRuntime.hpp" 63 #include "jvmci/jvmciJavaClasses.hpp" 64 #include "runtime/vframe.hpp" 65 #endif 66 #ifdef COMPILER2 67 #include "opto/c2compiler.hpp" 68 #endif 69 #ifdef SHARK 70 #include "shark/sharkCompiler.hpp" 71 #endif 72 73 #ifdef DTRACE_ENABLED 74 75 // Only bother with this argument setup if dtrace is available 76 77 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 78 { \ 79 Symbol* klass_name = (method)->klass_name(); \ 80 Symbol* name = (method)->name(); \ 81 Symbol* signature = (method)->signature(); \ 82 HOTSPOT_METHOD_COMPILE_BEGIN( \ 83 (char *) comp_name, strlen(comp_name), \ 84 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 85 (char *) name->bytes(), name->utf8_length(), \ 86 (char *) signature->bytes(), signature->utf8_length()); \ 87 } 88 89 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 90 { \ 91 Symbol* klass_name = (method)->klass_name(); \ 92 Symbol* name = (method)->name(); \ 93 Symbol* signature = (method)->signature(); \ 94 HOTSPOT_METHOD_COMPILE_END( \ 95 (char *) comp_name, strlen(comp_name), \ 96 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 97 (char *) name->bytes(), name->utf8_length(), \ 98 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 99 } 100 101 #else // ndef DTRACE_ENABLED 102 103 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 104 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 105 106 #endif // ndef DTRACE_ENABLED 107 108 bool CompileBroker::_initialized = false; 109 volatile bool CompileBroker::_should_block = false; 110 volatile jint CompileBroker::_print_compilation_warning = 0; 111 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 112 113 // The installed compiler(s) 114 AbstractCompiler* CompileBroker::_compilers[2]; 115 116 // These counters are used to assign an unique ID to each compilation. 117 volatile jint CompileBroker::_compilation_id = 0; 118 volatile jint CompileBroker::_osr_compilation_id = 0; 119 120 // Debugging information 121 int CompileBroker::_last_compile_type = no_compile; 122 int CompileBroker::_last_compile_level = CompLevel_none; 123 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 124 125 // Performance counters 126 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 127 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 128 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 129 130 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 131 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 132 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 133 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 134 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 135 136 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 137 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 138 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 139 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 140 141 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 142 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 143 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 144 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 145 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 146 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 147 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 148 149 // Timers and counters for generating statistics 150 elapsedTimer CompileBroker::_t_total_compilation; 151 elapsedTimer CompileBroker::_t_osr_compilation; 152 elapsedTimer CompileBroker::_t_standard_compilation; 153 elapsedTimer CompileBroker::_t_invalidated_compilation; 154 elapsedTimer CompileBroker::_t_bailedout_compilation; 155 156 int CompileBroker::_total_bailout_count = 0; 157 int CompileBroker::_total_invalidated_count = 0; 158 int CompileBroker::_total_compile_count = 0; 159 int CompileBroker::_total_osr_compile_count = 0; 160 int CompileBroker::_total_standard_compile_count = 0; 161 162 int CompileBroker::_sum_osr_bytes_compiled = 0; 163 int CompileBroker::_sum_standard_bytes_compiled = 0; 164 int CompileBroker::_sum_nmethod_size = 0; 165 int CompileBroker::_sum_nmethod_code_size = 0; 166 167 long CompileBroker::_peak_compilation_time = 0; 168 169 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 170 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 171 172 173 174 class CompilationLog : public StringEventLog { 175 public: 176 CompilationLog() : StringEventLog("Compilation events") { 177 } 178 179 void log_compile(JavaThread* thread, CompileTask* task) { 180 StringLogMessage lm; 181 stringStream sstr = lm.stream(); 182 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 183 task->print(&sstr, NULL, true, false); 184 log(thread, "%s", (const char*)lm); 185 } 186 187 void log_nmethod(JavaThread* thread, nmethod* nm) { 188 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 189 nm->compile_id(), nm->is_osr_method() ? "%" : "", 190 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 191 } 192 193 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 194 StringLogMessage lm; 195 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 196 if (retry_message != NULL) { 197 lm.append(" (%s)", retry_message); 198 } 199 lm.print("\n"); 200 log(thread, "%s", (const char*)lm); 201 } 202 203 void log_metaspace_failure(const char* reason) { 204 ResourceMark rm; 205 StringLogMessage lm; 206 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 207 lm.print("\n"); 208 log(JavaThread::current(), "%s", (const char*)lm); 209 } 210 }; 211 212 static CompilationLog* _compilation_log = NULL; 213 214 bool compileBroker_init() { 215 if (LogEvents) { 216 _compilation_log = new CompilationLog(); 217 } 218 219 // init directives stack, adding default directive 220 DirectivesStack::init(); 221 222 if (DirectivesParser::has_file()) { 223 return DirectivesParser::parse_from_flag(); 224 } else if (CompilerDirectivesPrint) { 225 // Print default directive even when no other was added 226 DirectivesStack::print(tty); 227 } 228 229 return true; 230 } 231 232 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 233 CompilerThread* thread = CompilerThread::current(); 234 thread->set_task(task); 235 #if INCLUDE_JVMCI 236 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 237 task->set_jvmci_compiler_thread(thread); 238 } 239 #endif 240 CompileLog* log = thread->log(); 241 if (log != NULL) task->log_task_start(log); 242 } 243 244 CompileTaskWrapper::~CompileTaskWrapper() { 245 CompilerThread* thread = CompilerThread::current(); 246 CompileTask* task = thread->task(); 247 CompileLog* log = thread->log(); 248 if (log != NULL) task->log_task_done(log); 249 thread->set_task(NULL); 250 task->set_code_handle(NULL); 251 thread->set_env(NULL); 252 if (task->is_blocking()) { 253 bool free_task = false; 254 { 255 MutexLocker notifier(task->lock(), thread); 256 task->mark_complete(); 257 #if INCLUDE_JVMCI 258 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 259 if (!task->has_waiter()) { 260 // The waiting thread timed out and thus did not free the task. 261 free_task = true; 262 } 263 task->set_jvmci_compiler_thread(NULL); 264 } 265 #endif 266 if (!free_task) { 267 // Notify the waiting thread that the compilation has completed 268 // so that it can free the task. 269 task->lock()->notify_all(); 270 } 271 } 272 if (free_task) { 273 // The task can only be freed once the task lock is released. 274 CompileTask::free(task); 275 } 276 } else { 277 task->mark_complete(); 278 279 // By convention, the compiling thread is responsible for 280 // recycling a non-blocking CompileTask. 281 CompileTask::free(task); 282 } 283 } 284 285 /** 286 * Add a CompileTask to a CompileQueue. 287 */ 288 void CompileQueue::add(CompileTask* task) { 289 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 290 291 task->set_next(NULL); 292 task->set_prev(NULL); 293 294 if (_last == NULL) { 295 // The compile queue is empty. 296 assert(_first == NULL, "queue is empty"); 297 _first = task; 298 _last = task; 299 } else { 300 // Append the task to the queue. 301 assert(_last->next() == NULL, "not last"); 302 _last->set_next(task); 303 task->set_prev(_last); 304 _last = task; 305 } 306 ++_size; 307 308 // Mark the method as being in the compile queue. 309 task->method()->set_queued_for_compilation(); 310 311 if (CIPrintCompileQueue) { 312 print_tty(); 313 } 314 315 if (LogCompilation && xtty != NULL) { 316 task->log_task_queued(); 317 } 318 319 // Notify CompilerThreads that a task is available. 320 MethodCompileQueue_lock->notify_all(); 321 } 322 323 /** 324 * Empties compilation queue by putting all compilation tasks onto 325 * a freelist. Furthermore, the method wakes up all threads that are 326 * waiting on a compilation task to finish. This can happen if background 327 * compilation is disabled. 328 */ 329 void CompileQueue::free_all() { 330 MutexLocker mu(MethodCompileQueue_lock); 331 CompileTask* next = _first; 332 333 // Iterate over all tasks in the compile queue 334 while (next != NULL) { 335 CompileTask* current = next; 336 next = current->next(); 337 { 338 // Wake up thread that blocks on the compile task. 339 MutexLocker ct_lock(current->lock()); 340 current->lock()->notify(); 341 } 342 // Put the task back on the freelist. 343 CompileTask::free(current); 344 } 345 _first = NULL; 346 347 // Wake up all threads that block on the queue. 348 MethodCompileQueue_lock->notify_all(); 349 } 350 351 /** 352 * Get the next CompileTask from a CompileQueue 353 */ 354 CompileTask* CompileQueue::get() { 355 // save methods from RedefineClasses across safepoint 356 // across MethodCompileQueue_lock below. 357 methodHandle save_method; 358 methodHandle save_hot_method; 359 360 MutexLocker locker(MethodCompileQueue_lock); 361 // If _first is NULL we have no more compile jobs. There are two reasons for 362 // having no compile jobs: First, we compiled everything we wanted. Second, 363 // we ran out of code cache so compilation has been disabled. In the latter 364 // case we perform code cache sweeps to free memory such that we can re-enable 365 // compilation. 366 while (_first == NULL) { 367 // Exit loop if compilation is disabled forever 368 if (CompileBroker::is_compilation_disabled_forever()) { 369 return NULL; 370 } 371 372 // If there are no compilation tasks and we can compile new jobs 373 // (i.e., there is enough free space in the code cache) there is 374 // no need to invoke the sweeper. As a result, the hotness of methods 375 // remains unchanged. This behavior is desired, since we want to keep 376 // the stable state, i.e., we do not want to evict methods from the 377 // code cache if it is unnecessary. 378 // We need a timed wait here, since compiler threads can exit if compilation 379 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 380 // is not critical and we do not want idle compiler threads to wake up too often. 381 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 382 } 383 384 if (CompileBroker::is_compilation_disabled_forever()) { 385 return NULL; 386 } 387 388 CompileTask* task; 389 { 390 NoSafepointVerifier nsv; 391 task = CompilationPolicy::policy()->select_task(this); 392 } 393 394 if (task != NULL) { 395 // Save method pointers across unlock safepoint. The task is removed from 396 // the compilation queue, which is walked during RedefineClasses. 397 save_method = methodHandle(task->method()); 398 save_hot_method = methodHandle(task->hot_method()); 399 400 remove(task); 401 purge_stale_tasks(); // may temporarily release MCQ lock 402 } 403 404 return task; 405 } 406 407 // Clean & deallocate stale compile tasks. 408 // Temporarily releases MethodCompileQueue lock. 409 void CompileQueue::purge_stale_tasks() { 410 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 411 if (_first_stale != NULL) { 412 // Stale tasks are purged when MCQ lock is released, 413 // but _first_stale updates are protected by MCQ lock. 414 // Once task processing starts and MCQ lock is released, 415 // other compiler threads can reuse _first_stale. 416 CompileTask* head = _first_stale; 417 _first_stale = NULL; 418 { 419 MutexUnlocker ul(MethodCompileQueue_lock); 420 for (CompileTask* task = head; task != NULL; ) { 421 CompileTask* next_task = task->next(); 422 CompileTaskWrapper ctw(task); // Frees the task 423 task->set_failure_reason("stale task"); 424 task = next_task; 425 } 426 } 427 } 428 } 429 430 void CompileQueue::remove(CompileTask* task) { 431 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 432 if (task->prev() != NULL) { 433 task->prev()->set_next(task->next()); 434 } else { 435 // max is the first element 436 assert(task == _first, "Sanity"); 437 _first = task->next(); 438 } 439 440 if (task->next() != NULL) { 441 task->next()->set_prev(task->prev()); 442 } else { 443 // max is the last element 444 assert(task == _last, "Sanity"); 445 _last = task->prev(); 446 } 447 --_size; 448 } 449 450 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 451 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 452 remove(task); 453 454 // Enqueue the task for reclamation (should be done outside MCQ lock) 455 task->set_next(_first_stale); 456 task->set_prev(NULL); 457 _first_stale = task; 458 } 459 460 // methods in the compile queue need to be marked as used on the stack 461 // so that they don't get reclaimed by Redefine Classes 462 void CompileQueue::mark_on_stack() { 463 CompileTask* task = _first; 464 while (task != NULL) { 465 task->mark_on_stack(); 466 task = task->next(); 467 } 468 } 469 470 471 CompileQueue* CompileBroker::compile_queue(int comp_level) { 472 if (is_c2_compile(comp_level)) return _c2_compile_queue; 473 if (is_c1_compile(comp_level)) return _c1_compile_queue; 474 return NULL; 475 } 476 477 void CompileBroker::print_compile_queues(outputStream* st) { 478 st->print_cr("Current compiles: "); 479 MutexLocker locker(MethodCompileQueue_lock); 480 481 char buf[2000]; 482 int buflen = sizeof(buf); 483 Threads::print_threads_compiling(st, buf, buflen); 484 485 st->cr(); 486 if (_c1_compile_queue != NULL) { 487 _c1_compile_queue->print(st); 488 } 489 if (_c2_compile_queue != NULL) { 490 _c2_compile_queue->print(st); 491 } 492 } 493 494 void CompileQueue::print(outputStream* st) { 495 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 496 st->print_cr("%s:", name()); 497 CompileTask* task = _first; 498 if (task == NULL) { 499 st->print_cr("Empty"); 500 } else { 501 while (task != NULL) { 502 task->print(st, NULL, true, true); 503 task = task->next(); 504 } 505 } 506 st->cr(); 507 } 508 509 void CompileQueue::print_tty() { 510 ttyLocker ttyl; 511 print(tty); 512 } 513 514 CompilerCounters::CompilerCounters() { 515 _current_method[0] = '\0'; 516 _compile_type = CompileBroker::no_compile; 517 } 518 519 // ------------------------------------------------------------------ 520 // CompileBroker::compilation_init 521 // 522 // Initialize the Compilation object 523 void CompileBroker::compilation_init(TRAPS) { 524 _last_method_compiled[0] = '\0'; 525 526 // No need to initialize compilation system if we do not use it. 527 if (!UseCompiler) { 528 return; 529 } 530 #ifndef SHARK 531 // Set the interface to the current compiler(s). 532 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 533 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 534 535 #if INCLUDE_JVMCI 536 if (EnableJVMCI) { 537 // This is creating a JVMCICompiler singleton. 538 JVMCICompiler* jvmci = new JVMCICompiler(); 539 540 if (UseJVMCICompiler) { 541 _compilers[1] = jvmci; 542 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 543 if (BootstrapJVMCI) { 544 // JVMCI will bootstrap so give it more threads 545 c2_count = MIN2(32, os::active_processor_count()); 546 } 547 } else { 548 c2_count = JVMCIThreads; 549 } 550 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 551 } else { 552 c1_count = JVMCIHostThreads; 553 } 554 555 if (!UseInterpreter || !BackgroundCompilation) { 556 // Force initialization of JVMCI compiler otherwise JVMCI 557 // compilations will not block until JVMCI is initialized 558 ResourceMark rm; 559 TempNewSymbol getCompiler = SymbolTable::new_symbol("getCompiler", CHECK); 560 TempNewSymbol sig = SymbolTable::new_symbol("()Ljdk/vm/ci/runtime/JVMCICompiler;", CHECK); 561 Handle jvmciRuntime = JVMCIRuntime::get_HotSpotJVMCIRuntime(CHECK); 562 JavaValue result(T_OBJECT); 563 JavaCalls::call_virtual(&result, jvmciRuntime, HotSpotJVMCIRuntime::klass(), getCompiler, sig, CHECK); 564 } 565 } 566 } 567 #endif // INCLUDE_JVMCI 568 569 #ifdef COMPILER1 570 if (c1_count > 0) { 571 _compilers[0] = new Compiler(); 572 } 573 #endif // COMPILER1 574 575 #ifdef COMPILER2 576 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 577 if (c2_count > 0) { 578 _compilers[1] = new C2Compiler(); 579 } 580 } 581 #endif // COMPILER2 582 583 #else // SHARK 584 int c1_count = 0; 585 int c2_count = 1; 586 587 _compilers[1] = new SharkCompiler(); 588 #endif // SHARK 589 590 // Start the compiler thread(s) and the sweeper thread 591 init_compiler_sweeper_threads(c1_count, c2_count); 592 // totalTime performance counter is always created as it is required 593 // by the implementation of java.lang.management.CompilationMBean. 594 { 595 EXCEPTION_MARK; 596 _perf_total_compilation = 597 PerfDataManager::create_counter(JAVA_CI, "totalTime", 598 PerfData::U_Ticks, CHECK); 599 } 600 601 if (UsePerfData) { 602 603 EXCEPTION_MARK; 604 605 // create the jvmstat performance counters 606 _perf_osr_compilation = 607 PerfDataManager::create_counter(SUN_CI, "osrTime", 608 PerfData::U_Ticks, CHECK); 609 610 _perf_standard_compilation = 611 PerfDataManager::create_counter(SUN_CI, "standardTime", 612 PerfData::U_Ticks, CHECK); 613 614 _perf_total_bailout_count = 615 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 616 PerfData::U_Events, CHECK); 617 618 _perf_total_invalidated_count = 619 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 620 PerfData::U_Events, CHECK); 621 622 _perf_total_compile_count = 623 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 624 PerfData::U_Events, CHECK); 625 _perf_total_osr_compile_count = 626 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 627 PerfData::U_Events, CHECK); 628 629 _perf_total_standard_compile_count = 630 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 631 PerfData::U_Events, CHECK); 632 633 _perf_sum_osr_bytes_compiled = 634 PerfDataManager::create_counter(SUN_CI, "osrBytes", 635 PerfData::U_Bytes, CHECK); 636 637 _perf_sum_standard_bytes_compiled = 638 PerfDataManager::create_counter(SUN_CI, "standardBytes", 639 PerfData::U_Bytes, CHECK); 640 641 _perf_sum_nmethod_size = 642 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 643 PerfData::U_Bytes, CHECK); 644 645 _perf_sum_nmethod_code_size = 646 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 647 PerfData::U_Bytes, CHECK); 648 649 _perf_last_method = 650 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 651 CompilerCounters::cmname_buffer_length, 652 "", CHECK); 653 654 _perf_last_failed_method = 655 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 656 CompilerCounters::cmname_buffer_length, 657 "", CHECK); 658 659 _perf_last_invalidated_method = 660 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 661 CompilerCounters::cmname_buffer_length, 662 "", CHECK); 663 664 _perf_last_compile_type = 665 PerfDataManager::create_variable(SUN_CI, "lastType", 666 PerfData::U_None, 667 (jlong)CompileBroker::no_compile, 668 CHECK); 669 670 _perf_last_compile_size = 671 PerfDataManager::create_variable(SUN_CI, "lastSize", 672 PerfData::U_Bytes, 673 (jlong)CompileBroker::no_compile, 674 CHECK); 675 676 677 _perf_last_failed_type = 678 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 679 PerfData::U_None, 680 (jlong)CompileBroker::no_compile, 681 CHECK); 682 683 _perf_last_invalidated_type = 684 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 685 PerfData::U_None, 686 (jlong)CompileBroker::no_compile, 687 CHECK); 688 } 689 690 _initialized = true; 691 } 692 693 694 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, 695 AbstractCompiler* comp, bool compiler_thread, TRAPS) { 696 JavaThread* thread = NULL; 697 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0); 698 instanceKlassHandle klass (THREAD, k); 699 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 700 Handle string = java_lang_String::create_from_str(name, CHECK_0); 701 702 // Initialize thread_oop to put it into the system threadGroup 703 Handle thread_group (THREAD, Universe::system_thread_group()); 704 JavaValue result(T_VOID); 705 JavaCalls::call_special(&result, thread_oop, 706 klass, 707 vmSymbols::object_initializer_name(), 708 vmSymbols::threadgroup_string_void_signature(), 709 thread_group, 710 string, 711 CHECK_0); 712 713 { 714 MutexLocker mu(Threads_lock, THREAD); 715 if (compiler_thread) { 716 thread = new CompilerThread(queue, counters); 717 } else { 718 thread = new CodeCacheSweeperThread(); 719 } 720 // At this point the new CompilerThread data-races with this startup 721 // thread (which I believe is the primoridal thread and NOT the VM 722 // thread). This means Java bytecodes being executed at startup can 723 // queue compile jobs which will run at whatever default priority the 724 // newly created CompilerThread runs at. 725 726 727 // At this point it may be possible that no osthread was created for the 728 // JavaThread due to lack of memory. We would have to throw an exception 729 // in that case. However, since this must work and we do not allow 730 // exceptions anyway, check and abort if this fails. 731 732 if (thread == NULL || thread->osthread() == NULL) { 733 vm_exit_during_initialization("java.lang.OutOfMemoryError", 734 os::native_thread_creation_failed_msg()); 735 } 736 737 java_lang_Thread::set_thread(thread_oop(), thread); 738 739 // Note that this only sets the JavaThread _priority field, which by 740 // definition is limited to Java priorities and not OS priorities. 741 // The os-priority is set in the CompilerThread startup code itself 742 743 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 744 745 // Note that we cannot call os::set_priority because it expects Java 746 // priorities and we are *explicitly* using OS priorities so that it's 747 // possible to set the compiler thread priority higher than any Java 748 // thread. 749 750 int native_prio = CompilerThreadPriority; 751 if (native_prio == -1) { 752 if (UseCriticalCompilerThreadPriority) { 753 native_prio = os::java_to_os_priority[CriticalPriority]; 754 } else { 755 native_prio = os::java_to_os_priority[NearMaxPriority]; 756 } 757 } 758 os::set_native_priority(thread, native_prio); 759 760 java_lang_Thread::set_daemon(thread_oop()); 761 762 thread->set_threadObj(thread_oop()); 763 if (compiler_thread) { 764 thread->as_CompilerThread()->set_compiler(comp); 765 } 766 Threads::add(thread); 767 Thread::start(thread); 768 } 769 770 // Let go of Threads_lock before yielding 771 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 772 773 return thread; 774 } 775 776 777 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) { 778 EXCEPTION_MARK; 779 #if !defined(ZERO) && !defined(SHARK) 780 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 781 #endif // !ZERO && !SHARK 782 // Initialize the compilation queue 783 if (c2_compiler_count > 0) { 784 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 785 _c2_compile_queue = new CompileQueue(name); 786 _compilers[1]->set_num_compiler_threads(c2_compiler_count); 787 } 788 if (c1_compiler_count > 0) { 789 _c1_compile_queue = new CompileQueue("C1 compile queue"); 790 _compilers[0]->set_num_compiler_threads(c1_compiler_count); 791 } 792 793 int compiler_count = c1_compiler_count + c2_compiler_count; 794 795 char name_buffer[256]; 796 const bool compiler_thread = true; 797 for (int i = 0; i < c2_compiler_count; i++) { 798 // Create a name for our thread. 799 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 800 CompilerCounters* counters = new CompilerCounters(); 801 // Shark and C2 802 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK); 803 } 804 805 for (int i = c2_compiler_count; i < compiler_count; i++) { 806 // Create a name for our thread. 807 sprintf(name_buffer, "C1 CompilerThread%d", i); 808 CompilerCounters* counters = new CompilerCounters(); 809 // C1 810 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK); 811 } 812 813 if (UsePerfData) { 814 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK); 815 } 816 817 if (MethodFlushing) { 818 // Initialize the sweeper thread 819 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK); 820 } 821 } 822 823 824 /** 825 * Set the methods on the stack as on_stack so that redefine classes doesn't 826 * reclaim them. This method is executed at a safepoint. 827 */ 828 void CompileBroker::mark_on_stack() { 829 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 830 // Since we are at a safepoint, we do not need a lock to access 831 // the compile queues. 832 if (_c2_compile_queue != NULL) { 833 _c2_compile_queue->mark_on_stack(); 834 } 835 if (_c1_compile_queue != NULL) { 836 _c1_compile_queue->mark_on_stack(); 837 } 838 } 839 840 // ------------------------------------------------------------------ 841 // CompileBroker::compile_method 842 // 843 // Request compilation of a method. 844 void CompileBroker::compile_method_base(const methodHandle& method, 845 int osr_bci, 846 int comp_level, 847 const methodHandle& hot_method, 848 int hot_count, 849 CompileTask::CompileReason compile_reason, 850 bool blocking, 851 Thread* thread) { 852 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 853 assert(method->method_holder()->is_instance_klass(), 854 "sanity check"); 855 assert(!method->method_holder()->is_not_initialized(), 856 "method holder must be initialized"); 857 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 858 859 if (CIPrintRequests) { 860 tty->print("request: "); 861 method->print_short_name(tty); 862 if (osr_bci != InvocationEntryBci) { 863 tty->print(" osr_bci: %d", osr_bci); 864 } 865 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 866 if (!hot_method.is_null()) { 867 tty->print(" hot: "); 868 if (hot_method() != method()) { 869 hot_method->print_short_name(tty); 870 } else { 871 tty->print("yes"); 872 } 873 } 874 tty->cr(); 875 } 876 877 // A request has been made for compilation. Before we do any 878 // real work, check to see if the method has been compiled 879 // in the meantime with a definitive result. 880 if (compilation_is_complete(method, osr_bci, comp_level)) { 881 return; 882 } 883 884 #ifndef PRODUCT 885 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 886 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 887 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 888 return; 889 } 890 } 891 #endif 892 893 // If this method is already in the compile queue, then 894 // we do not block the current thread. 895 if (compilation_is_in_queue(method)) { 896 // We may want to decay our counter a bit here to prevent 897 // multiple denied requests for compilation. This is an 898 // open compilation policy issue. Note: The other possibility, 899 // in the case that this is a blocking compile request, is to have 900 // all subsequent blocking requesters wait for completion of 901 // ongoing compiles. Note that in this case we'll need a protocol 902 // for freeing the associated compile tasks. [Or we could have 903 // a single static monitor on which all these waiters sleep.] 904 return; 905 } 906 907 // If the requesting thread is holding the pending list lock 908 // then we just return. We can't risk blocking while holding 909 // the pending list lock or a 3-way deadlock may occur 910 // between the reference handler thread, a GC (instigated 911 // by a compiler thread), and compiled method registration. 912 if (ReferencePendingListLocker::is_locked_by_self()) { 913 return; 914 } 915 916 if (TieredCompilation) { 917 // Tiered policy requires MethodCounters to exist before adding a method to 918 // the queue. Create if we don't have them yet. 919 method->get_method_counters(thread); 920 } 921 922 // Outputs from the following MutexLocker block: 923 CompileTask* task = NULL; 924 CompileQueue* queue = compile_queue(comp_level); 925 926 // Acquire our lock. 927 { 928 MutexLocker locker(MethodCompileQueue_lock, thread); 929 930 // Make sure the method has not slipped into the queues since 931 // last we checked; note that those checks were "fast bail-outs". 932 // Here we need to be more careful, see 14012000 below. 933 if (compilation_is_in_queue(method)) { 934 return; 935 } 936 937 // We need to check again to see if the compilation has 938 // completed. A previous compilation may have registered 939 // some result. 940 if (compilation_is_complete(method, osr_bci, comp_level)) { 941 return; 942 } 943 944 // We now know that this compilation is not pending, complete, 945 // or prohibited. Assign a compile_id to this compilation 946 // and check to see if it is in our [Start..Stop) range. 947 int compile_id = assign_compile_id(method, osr_bci); 948 if (compile_id == 0) { 949 // The compilation falls outside the allowed range. 950 return; 951 } 952 953 #if INCLUDE_JVMCI 954 if (UseJVMCICompiler) { 955 if (blocking) { 956 // Don't allow blocking compiles for requests triggered by JVMCI. 957 if (thread->is_Compiler_thread()) { 958 blocking = false; 959 } 960 961 // Don't allow blocking compiles if inside a class initializer or while performing class loading 962 vframeStream vfst((JavaThread*) thread); 963 for (; !vfst.at_end(); vfst.next()) { 964 if (vfst.method()->is_static_initializer() || 965 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 966 vfst.method()->name() == vmSymbols::loadClass_name())) { 967 blocking = false; 968 break; 969 } 970 } 971 972 // Don't allow blocking compilation requests to JVMCI 973 // if JVMCI itself is not yet initialized 974 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 975 blocking = false; 976 } 977 978 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 979 // to avoid deadlock between compiler thread(s) and threads run at shutdown 980 // such as the DestroyJavaVM thread. 981 if (JVMCIRuntime::shutdown_called()) { 982 blocking = false; 983 } 984 } 985 } 986 #endif // INCLUDE_JVMCI 987 988 // We will enter the compilation in the queue. 989 // 14012000: Note that this sets the queued_for_compile bits in 990 // the target method. We can now reason that a method cannot be 991 // queued for compilation more than once, as follows: 992 // Before a thread queues a task for compilation, it first acquires 993 // the compile queue lock, then checks if the method's queued bits 994 // are set or it has already been compiled. Thus there can not be two 995 // instances of a compilation task for the same method on the 996 // compilation queue. Consider now the case where the compilation 997 // thread has already removed a task for that method from the queue 998 // and is in the midst of compiling it. In this case, the 999 // queued_for_compile bits must be set in the method (and these 1000 // will be visible to the current thread, since the bits were set 1001 // under protection of the compile queue lock, which we hold now. 1002 // When the compilation completes, the compiler thread first sets 1003 // the compilation result and then clears the queued_for_compile 1004 // bits. Neither of these actions are protected by a barrier (or done 1005 // under the protection of a lock), so the only guarantee we have 1006 // (on machines with TSO (Total Store Order)) is that these values 1007 // will update in that order. As a result, the only combinations of 1008 // these bits that the current thread will see are, in temporal order: 1009 // <RESULT, QUEUE> : 1010 // <0, 1> : in compile queue, but not yet compiled 1011 // <1, 1> : compiled but queue bit not cleared 1012 // <1, 0> : compiled and queue bit cleared 1013 // Because we first check the queue bits then check the result bits, 1014 // we are assured that we cannot introduce a duplicate task. 1015 // Note that if we did the tests in the reverse order (i.e. check 1016 // result then check queued bit), we could get the result bit before 1017 // the compilation completed, and the queue bit after the compilation 1018 // completed, and end up introducing a "duplicate" (redundant) task. 1019 // In that case, the compiler thread should first check if a method 1020 // has already been compiled before trying to compile it. 1021 // NOTE: in the event that there are multiple compiler threads and 1022 // there is de-optimization/recompilation, things will get hairy, 1023 // and in that case it's best to protect both the testing (here) of 1024 // these bits, and their updating (here and elsewhere) under a 1025 // common lock. 1026 task = create_compile_task(queue, 1027 compile_id, method, 1028 osr_bci, comp_level, 1029 hot_method, hot_count, compile_reason, 1030 blocking); 1031 } 1032 1033 if (blocking) { 1034 wait_for_completion(task); 1035 } 1036 } 1037 1038 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1039 int comp_level, 1040 const methodHandle& hot_method, int hot_count, 1041 CompileTask::CompileReason compile_reason, 1042 Thread* THREAD) { 1043 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1044 if (!_initialized || comp_level == CompLevel_none) { 1045 return NULL; 1046 } 1047 1048 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1049 assert(comp != NULL, "Ensure we have a compiler"); 1050 1051 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1052 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1053 DirectivesStack::release(directive); 1054 return nm; 1055 } 1056 1057 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1058 int comp_level, 1059 const methodHandle& hot_method, int hot_count, 1060 CompileTask::CompileReason compile_reason, 1061 DirectiveSet* directive, 1062 Thread* THREAD) { 1063 1064 // make sure arguments make sense 1065 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1066 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1067 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1068 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1069 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1070 // allow any levels for WhiteBox 1071 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1072 // return quickly if possible 1073 1074 // lock, make sure that the compilation 1075 // isn't prohibited in a straightforward way. 1076 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1077 if (!comp->can_compile_method(method) || 1078 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1079 return NULL; 1080 } 1081 1082 if (osr_bci == InvocationEntryBci) { 1083 // standard compilation 1084 CompiledMethod* method_code = method->code(); 1085 if (method_code != NULL && method_code->is_nmethod()) { 1086 if (compilation_is_complete(method, osr_bci, comp_level)) { 1087 return (nmethod*) method_code; 1088 } 1089 } 1090 if (method->is_not_compilable(comp_level)) { 1091 return NULL; 1092 } 1093 } else { 1094 // osr compilation 1095 #ifndef TIERED 1096 // seems like an assert of dubious value 1097 assert(comp_level == CompLevel_highest_tier, 1098 "all OSR compiles are assumed to be at a single compilation level"); 1099 #endif // TIERED 1100 // We accept a higher level osr method 1101 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1102 if (nm != NULL) return nm; 1103 if (method->is_not_osr_compilable(comp_level)) return NULL; 1104 } 1105 1106 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1107 // some prerequisites that are compiler specific 1108 if (comp->is_c2() || comp->is_shark()) { 1109 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1110 // Resolve all classes seen in the signature of the method 1111 // we are compiling. 1112 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1113 } 1114 1115 // If the method is native, do the lookup in the thread requesting 1116 // the compilation. Native lookups can load code, which is not 1117 // permitted during compilation. 1118 // 1119 // Note: A native method implies non-osr compilation which is 1120 // checked with an assertion at the entry of this method. 1121 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1122 bool in_base_library; 1123 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1124 if (HAS_PENDING_EXCEPTION) { 1125 // In case of an exception looking up the method, we just forget 1126 // about it. The interpreter will kick-in and throw the exception. 1127 method->set_not_compilable(); // implies is_not_osr_compilable() 1128 CLEAR_PENDING_EXCEPTION; 1129 return NULL; 1130 } 1131 assert(method->has_native_function(), "must have native code by now"); 1132 } 1133 1134 // RedefineClasses() has replaced this method; just return 1135 if (method->is_old()) { 1136 return NULL; 1137 } 1138 1139 // JVMTI -- post_compile_event requires jmethod_id() that may require 1140 // a lock the compiling thread can not acquire. Prefetch it here. 1141 if (JvmtiExport::should_post_compiled_method_load()) { 1142 method->jmethod_id(); 1143 } 1144 1145 // do the compilation 1146 if (method->is_native()) { 1147 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1148 // The following native methods: 1149 // 1150 // java.lang.Float.intBitsToFloat 1151 // java.lang.Float.floatToRawIntBits 1152 // java.lang.Double.longBitsToDouble 1153 // java.lang.Double.doubleToRawLongBits 1154 // 1155 // are called through the interpreter even if interpreter native stubs 1156 // are not preferred (i.e., calling through adapter handlers is preferred). 1157 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1158 // if the version of the methods from the native libraries is called. 1159 // As the interpreter and the C2-intrinsified version of the methods preserves 1160 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1161 if ((UseSSE >= 1 && 1162 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1163 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1164 (UseSSE >= 2 && 1165 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1166 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1167 return NULL; 1168 } 1169 1170 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1171 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1172 // 1173 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1174 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1175 AdapterHandlerLibrary::create_native_wrapper(method); 1176 } else { 1177 return NULL; 1178 } 1179 } else { 1180 // If the compiler is shut off due to code cache getting full 1181 // fail out now so blocking compiles dont hang the java thread 1182 if (!should_compile_new_jobs()) { 1183 CompilationPolicy::policy()->delay_compilation(method()); 1184 return NULL; 1185 } 1186 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; 1187 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1188 } 1189 1190 // return requested nmethod 1191 // We accept a higher level osr method 1192 if (osr_bci == InvocationEntryBci) { 1193 CompiledMethod* code = method->code(); 1194 if (code == NULL) { 1195 return (nmethod*) code; 1196 } else { 1197 return code->as_nmethod_or_null(); 1198 } 1199 } 1200 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1201 } 1202 1203 1204 // ------------------------------------------------------------------ 1205 // CompileBroker::compilation_is_complete 1206 // 1207 // See if compilation of this method is already complete. 1208 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1209 int osr_bci, 1210 int comp_level) { 1211 bool is_osr = (osr_bci != standard_entry_bci); 1212 if (is_osr) { 1213 if (method->is_not_osr_compilable(comp_level)) { 1214 return true; 1215 } else { 1216 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1217 return (result != NULL); 1218 } 1219 } else { 1220 if (method->is_not_compilable(comp_level)) { 1221 return true; 1222 } else { 1223 CompiledMethod* result = method->code(); 1224 if (result == NULL) return false; 1225 return comp_level == result->comp_level(); 1226 } 1227 } 1228 } 1229 1230 1231 /** 1232 * See if this compilation is already requested. 1233 * 1234 * Implementation note: there is only a single "is in queue" bit 1235 * for each method. This means that the check below is overly 1236 * conservative in the sense that an osr compilation in the queue 1237 * will block a normal compilation from entering the queue (and vice 1238 * versa). This can be remedied by a full queue search to disambiguate 1239 * cases. If it is deemed profitable, this may be done. 1240 */ 1241 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1242 return method->queued_for_compilation(); 1243 } 1244 1245 // ------------------------------------------------------------------ 1246 // CompileBroker::compilation_is_prohibited 1247 // 1248 // See if this compilation is not allowed. 1249 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1250 bool is_native = method->is_native(); 1251 // Some compilers may not support the compilation of natives. 1252 AbstractCompiler *comp = compiler(comp_level); 1253 if (is_native && 1254 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1255 method->set_not_compilable_quietly(comp_level); 1256 return true; 1257 } 1258 1259 bool is_osr = (osr_bci != standard_entry_bci); 1260 // Some compilers may not support on stack replacement. 1261 if (is_osr && 1262 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1263 method->set_not_osr_compilable(comp_level); 1264 return true; 1265 } 1266 1267 // The method may be explicitly excluded by the user. 1268 double scale; 1269 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1270 bool quietly = CompilerOracle::should_exclude_quietly(); 1271 if (PrintCompilation && !quietly) { 1272 // This does not happen quietly... 1273 ResourceMark rm; 1274 tty->print("### Excluding %s:%s", 1275 method->is_native() ? "generation of native wrapper" : "compile", 1276 (method->is_static() ? " static" : "")); 1277 method->print_short_name(tty); 1278 tty->cr(); 1279 } 1280 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1281 } 1282 1283 return false; 1284 } 1285 1286 /** 1287 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1288 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1289 * The function also allows to generate separate compilation IDs for OSR compilations. 1290 */ 1291 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1292 #ifdef ASSERT 1293 bool is_osr = (osr_bci != standard_entry_bci); 1294 int id; 1295 if (method->is_native()) { 1296 assert(!is_osr, "can't be osr"); 1297 // Adapters, native wrappers and method handle intrinsics 1298 // should be generated always. 1299 return Atomic::add(1, &_compilation_id); 1300 } else if (CICountOSR && is_osr) { 1301 id = Atomic::add(1, &_osr_compilation_id); 1302 if (CIStartOSR <= id && id < CIStopOSR) { 1303 return id; 1304 } 1305 } else { 1306 id = Atomic::add(1, &_compilation_id); 1307 if (CIStart <= id && id < CIStop) { 1308 return id; 1309 } 1310 } 1311 1312 // Method was not in the appropriate compilation range. 1313 method->set_not_compilable_quietly(); 1314 return 0; 1315 #else 1316 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1317 // only _compilation_id is incremented. 1318 return Atomic::add(1, &_compilation_id); 1319 #endif 1320 } 1321 1322 // ------------------------------------------------------------------ 1323 // CompileBroker::assign_compile_id_unlocked 1324 // 1325 // Public wrapper for assign_compile_id that acquires the needed locks 1326 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1327 MutexLocker locker(MethodCompileQueue_lock, thread); 1328 return assign_compile_id(method, osr_bci); 1329 } 1330 1331 // ------------------------------------------------------------------ 1332 // CompileBroker::preload_classes 1333 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1334 // Move this code over from c1_Compiler.cpp 1335 ShouldNotReachHere(); 1336 } 1337 1338 1339 // ------------------------------------------------------------------ 1340 // CompileBroker::create_compile_task 1341 // 1342 // Create a CompileTask object representing the current request for 1343 // compilation. Add this task to the queue. 1344 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1345 int compile_id, 1346 const methodHandle& method, 1347 int osr_bci, 1348 int comp_level, 1349 const methodHandle& hot_method, 1350 int hot_count, 1351 CompileTask::CompileReason compile_reason, 1352 bool blocking) { 1353 CompileTask* new_task = CompileTask::allocate(); 1354 new_task->initialize(compile_id, method, osr_bci, comp_level, 1355 hot_method, hot_count, compile_reason, 1356 blocking); 1357 queue->add(new_task); 1358 return new_task; 1359 } 1360 1361 #if INCLUDE_JVMCI 1362 // The number of milliseconds to wait before checking if 1363 // JVMCI compilation has made progress. 1364 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500; 1365 1366 // The number of JVMCI compilation progress checks that must fail 1367 // before unblocking a thread waiting for a blocking compilation. 1368 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5; 1369 1370 /** 1371 * Waits for a JVMCI compiler to complete a given task. This thread 1372 * waits until either the task completes or it sees no JVMCI compilation 1373 * progress for N consecutive milliseconds where N is 1374 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1375 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1376 * 1377 * @return true if this thread needs to free/recycle the task 1378 */ 1379 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1380 MutexLocker waiter(task->lock(), thread); 1381 int progress_wait_attempts = 0; 1382 int methods_compiled = jvmci->methods_compiled(); 1383 while (!task->is_complete() && !is_compilation_disabled_forever() && 1384 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1385 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1386 1387 bool progress; 1388 if (jvmci_compiler_thread != NULL) { 1389 // If the JVMCI compiler thread is not blocked, we deem it to be making progress. 1390 progress = jvmci_compiler_thread->thread_state() != _thread_blocked; 1391 } else { 1392 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1393 // that all JVMCI compiler threads are blocked on. We use the counter for 1394 // successful JVMCI compilations to determine whether JVMCI compilation 1395 // is still making progress through the JVMCI compiler queue. 1396 progress = jvmci->methods_compiled() != methods_compiled; 1397 } 1398 1399 if (!progress) { 1400 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1401 if (PrintCompilation) { 1402 task->print(tty, "wait for blocking compilation timed out"); 1403 } 1404 break; 1405 } 1406 } else { 1407 progress_wait_attempts = 0; 1408 if (jvmci_compiler_thread == NULL) { 1409 methods_compiled = jvmci->methods_compiled(); 1410 } 1411 } 1412 } 1413 task->clear_waiter(); 1414 return task->is_complete(); 1415 } 1416 #endif 1417 1418 /** 1419 * Wait for the compilation task to complete. 1420 */ 1421 void CompileBroker::wait_for_completion(CompileTask* task) { 1422 if (CIPrintCompileQueue) { 1423 ttyLocker ttyl; 1424 tty->print_cr("BLOCKING FOR COMPILE"); 1425 } 1426 1427 assert(task->is_blocking(), "can only wait on blocking task"); 1428 1429 JavaThread* thread = JavaThread::current(); 1430 thread->set_blocked_on_compilation(true); 1431 1432 methodHandle method(thread, task->method()); 1433 bool free_task; 1434 #if INCLUDE_JVMCI 1435 AbstractCompiler* comp = compiler(task->comp_level()); 1436 if (comp->is_jvmci()) { 1437 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1438 } else 1439 #endif 1440 { 1441 MutexLocker waiter(task->lock(), thread); 1442 free_task = true; 1443 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1444 task->lock()->wait(); 1445 } 1446 } 1447 1448 thread->set_blocked_on_compilation(false); 1449 if (free_task) { 1450 if (is_compilation_disabled_forever()) { 1451 CompileTask::free(task); 1452 return; 1453 } 1454 1455 // It is harmless to check this status without the lock, because 1456 // completion is a stable property (until the task object is recycled). 1457 assert(task->is_complete(), "Compilation should have completed"); 1458 assert(task->code_handle() == NULL, "must be reset"); 1459 1460 // By convention, the waiter is responsible for recycling a 1461 // blocking CompileTask. Since there is only one waiter ever 1462 // waiting on a CompileTask, we know that no one else will 1463 // be using this CompileTask; we can free it. 1464 CompileTask::free(task); 1465 } 1466 } 1467 1468 /** 1469 * Initialize compiler thread(s) + compiler object(s). The postcondition 1470 * of this function is that the compiler runtimes are initialized and that 1471 * compiler threads can start compiling. 1472 */ 1473 bool CompileBroker::init_compiler_runtime() { 1474 CompilerThread* thread = CompilerThread::current(); 1475 AbstractCompiler* comp = thread->compiler(); 1476 // Final sanity check - the compiler object must exist 1477 guarantee(comp != NULL, "Compiler object must exist"); 1478 1479 int system_dictionary_modification_counter; 1480 { 1481 MutexLocker locker(Compile_lock, thread); 1482 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1483 } 1484 1485 { 1486 // Must switch to native to allocate ci_env 1487 ThreadToNativeFromVM ttn(thread); 1488 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1489 // Cache Jvmti state 1490 ci_env.cache_jvmti_state(); 1491 // Cache DTrace flags 1492 ci_env.cache_dtrace_flags(); 1493 1494 // Switch back to VM state to do compiler initialization 1495 ThreadInVMfromNative tv(thread); 1496 ResetNoHandleMark rnhm; 1497 1498 if (!comp->is_shark()) { 1499 // Perform per-thread and global initializations 1500 comp->initialize(); 1501 } 1502 } 1503 1504 if (comp->is_failed()) { 1505 disable_compilation_forever(); 1506 // If compiler initialization failed, no compiler thread that is specific to a 1507 // particular compiler runtime will ever start to compile methods. 1508 shutdown_compiler_runtime(comp, thread); 1509 return false; 1510 } 1511 1512 // C1 specific check 1513 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1514 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1515 return false; 1516 } 1517 1518 return true; 1519 } 1520 1521 /** 1522 * If C1 and/or C2 initialization failed, we shut down all compilation. 1523 * We do this to keep things simple. This can be changed if it ever turns 1524 * out to be a problem. 1525 */ 1526 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1527 // Free buffer blob, if allocated 1528 if (thread->get_buffer_blob() != NULL) { 1529 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1530 CodeCache::free(thread->get_buffer_blob()); 1531 } 1532 1533 if (comp->should_perform_shutdown()) { 1534 // There are two reasons for shutting down the compiler 1535 // 1) compiler runtime initialization failed 1536 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1537 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1538 1539 // Only one thread per compiler runtime object enters here 1540 // Set state to shut down 1541 comp->set_shut_down(); 1542 1543 // Delete all queued compilation tasks to make compiler threads exit faster. 1544 if (_c1_compile_queue != NULL) { 1545 _c1_compile_queue->free_all(); 1546 } 1547 1548 if (_c2_compile_queue != NULL) { 1549 _c2_compile_queue->free_all(); 1550 } 1551 1552 // Set flags so that we continue execution with using interpreter only. 1553 UseCompiler = false; 1554 UseInterpreter = true; 1555 1556 // We could delete compiler runtimes also. However, there are references to 1557 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1558 // fail. This can be done later if necessary. 1559 } 1560 } 1561 1562 // ------------------------------------------------------------------ 1563 // CompileBroker::compiler_thread_loop 1564 // 1565 // The main loop run by a CompilerThread. 1566 void CompileBroker::compiler_thread_loop() { 1567 CompilerThread* thread = CompilerThread::current(); 1568 CompileQueue* queue = thread->queue(); 1569 // For the thread that initializes the ciObjectFactory 1570 // this resource mark holds all the shared objects 1571 ResourceMark rm; 1572 1573 // First thread to get here will initialize the compiler interface 1574 1575 if (!ciObjectFactory::is_initialized()) { 1576 ASSERT_IN_VM; 1577 MutexLocker only_one (CompileThread_lock, thread); 1578 if (!ciObjectFactory::is_initialized()) { 1579 ciObjectFactory::initialize(); 1580 } 1581 } 1582 1583 // Open a log. 1584 if (LogCompilation) { 1585 init_compiler_thread_log(); 1586 } 1587 CompileLog* log = thread->log(); 1588 if (log != NULL) { 1589 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1590 thread->name(), 1591 os::current_thread_id(), 1592 os::current_process_id()); 1593 log->stamp(); 1594 log->end_elem(); 1595 } 1596 1597 // If compiler thread/runtime initialization fails, exit the compiler thread 1598 if (!init_compiler_runtime()) { 1599 return; 1600 } 1601 1602 // Poll for new compilation tasks as long as the JVM runs. Compilation 1603 // should only be disabled if something went wrong while initializing the 1604 // compiler runtimes. This, in turn, should not happen. The only known case 1605 // when compiler runtime initialization fails is if there is not enough free 1606 // space in the code cache to generate the necessary stubs, etc. 1607 while (!is_compilation_disabled_forever()) { 1608 // We need this HandleMark to avoid leaking VM handles. 1609 HandleMark hm(thread); 1610 1611 CompileTask* task = queue->get(); 1612 if (task == NULL) { 1613 continue; 1614 } 1615 1616 // Give compiler threads an extra quanta. They tend to be bursty and 1617 // this helps the compiler to finish up the job. 1618 if (CompilerThreadHintNoPreempt) { 1619 os::hint_no_preempt(); 1620 } 1621 1622 // Assign the task to the current thread. Mark this compilation 1623 // thread as active for the profiler. 1624 CompileTaskWrapper ctw(task); 1625 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1626 task->set_code_handle(&result_handle); 1627 methodHandle method(thread, task->method()); 1628 1629 // Never compile a method if breakpoints are present in it 1630 if (method()->number_of_breakpoints() == 0) { 1631 // Compile the method. 1632 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1633 invoke_compiler_on_method(task); 1634 } else { 1635 // After compilation is disabled, remove remaining methods from queue 1636 method->clear_queued_for_compilation(); 1637 task->set_failure_reason("compilation is disabled"); 1638 } 1639 } 1640 } 1641 1642 // Shut down compiler runtime 1643 shutdown_compiler_runtime(thread->compiler(), thread); 1644 } 1645 1646 // ------------------------------------------------------------------ 1647 // CompileBroker::init_compiler_thread_log 1648 // 1649 // Set up state required by +LogCompilation. 1650 void CompileBroker::init_compiler_thread_log() { 1651 CompilerThread* thread = CompilerThread::current(); 1652 char file_name[4*K]; 1653 FILE* fp = NULL; 1654 intx thread_id = os::current_thread_id(); 1655 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1656 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1657 if (dir == NULL) { 1658 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1659 thread_id, os::current_process_id()); 1660 } else { 1661 jio_snprintf(file_name, sizeof(file_name), 1662 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1663 os::file_separator(), thread_id, os::current_process_id()); 1664 } 1665 1666 fp = fopen(file_name, "wt"); 1667 if (fp != NULL) { 1668 if (LogCompilation && Verbose) { 1669 tty->print_cr("Opening compilation log %s", file_name); 1670 } 1671 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1672 if (log == NULL) { 1673 fclose(fp); 1674 return; 1675 } 1676 thread->init_log(log); 1677 1678 if (xtty != NULL) { 1679 ttyLocker ttyl; 1680 // Record any per thread log files 1681 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1682 } 1683 return; 1684 } 1685 } 1686 warning("Cannot open log file: %s", file_name); 1687 } 1688 1689 void CompileBroker::log_metaspace_failure() { 1690 const char* message = "some methods may not be compiled because metaspace " 1691 "is out of memory"; 1692 if (_compilation_log != NULL) { 1693 _compilation_log->log_metaspace_failure(message); 1694 } 1695 if (PrintCompilation) { 1696 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1697 } 1698 } 1699 1700 1701 // ------------------------------------------------------------------ 1702 // CompileBroker::set_should_block 1703 // 1704 // Set _should_block. 1705 // Call this from the VM, with Threads_lock held and a safepoint requested. 1706 void CompileBroker::set_should_block() { 1707 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1708 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1709 #ifndef PRODUCT 1710 if (PrintCompilation && (Verbose || WizardMode)) 1711 tty->print_cr("notifying compiler thread pool to block"); 1712 #endif 1713 _should_block = true; 1714 } 1715 1716 // ------------------------------------------------------------------ 1717 // CompileBroker::maybe_block 1718 // 1719 // Call this from the compiler at convenient points, to poll for _should_block. 1720 void CompileBroker::maybe_block() { 1721 if (_should_block) { 1722 #ifndef PRODUCT 1723 if (PrintCompilation && (Verbose || WizardMode)) 1724 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1725 #endif 1726 ThreadInVMfromNative tivfn(JavaThread::current()); 1727 } 1728 } 1729 1730 // wrapper for CodeCache::print_summary() 1731 static void codecache_print(bool detailed) 1732 { 1733 ResourceMark rm; 1734 stringStream s; 1735 // Dump code cache into a buffer before locking the tty, 1736 { 1737 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1738 CodeCache::print_summary(&s, detailed); 1739 } 1740 ttyLocker ttyl; 1741 tty->print("%s", s.as_string()); 1742 } 1743 1744 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) { 1745 1746 if (success) { 1747 task->mark_success(); 1748 if (ci_env != NULL) { 1749 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1750 } 1751 if (_compilation_log != NULL) { 1752 nmethod* code = task->code(); 1753 if (code != NULL) { 1754 _compilation_log->log_nmethod(thread, code); 1755 } 1756 } 1757 } 1758 1759 // simulate crash during compilation 1760 assert(task->compile_id() != CICrashAt, "just as planned"); 1761 if (event.should_commit()) { 1762 event.set_method(task->method()); 1763 event.set_compileID(task->compile_id()); 1764 event.set_compileLevel(task->comp_level()); 1765 event.set_succeded(task->is_success()); 1766 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1767 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1768 event.set_inlinedBytes(task->num_inlined_bytecodes()); 1769 event.commit(); 1770 } 1771 } 1772 1773 int DirectivesStack::_depth = 0; 1774 CompilerDirectives* DirectivesStack::_top = NULL; 1775 CompilerDirectives* DirectivesStack::_bottom = NULL; 1776 1777 // ------------------------------------------------------------------ 1778 // CompileBroker::invoke_compiler_on_method 1779 // 1780 // Compile a method. 1781 // 1782 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1783 if (PrintCompilation) { 1784 ResourceMark rm; 1785 task->print_tty(); 1786 } 1787 elapsedTimer time; 1788 1789 CompilerThread* thread = CompilerThread::current(); 1790 ResourceMark rm(thread); 1791 1792 if (LogEvents) { 1793 _compilation_log->log_compile(thread, task); 1794 } 1795 1796 // Common flags. 1797 uint compile_id = task->compile_id(); 1798 int osr_bci = task->osr_bci(); 1799 bool is_osr = (osr_bci != standard_entry_bci); 1800 bool should_log = (thread->log() != NULL); 1801 bool should_break = false; 1802 const int task_level = task->comp_level(); 1803 AbstractCompiler* comp = task->compiler(); 1804 1805 DirectiveSet* directive; 1806 { 1807 // create the handle inside it's own block so it can't 1808 // accidentally be referenced once the thread transitions to 1809 // native. The NoHandleMark before the transition should catch 1810 // any cases where this occurs in the future. 1811 methodHandle method(thread, task->method()); 1812 assert(!method->is_native(), "no longer compile natives"); 1813 1814 // Look up matching directives 1815 directive = DirectivesStack::getMatchingDirective(method, comp); 1816 1817 // Save information about this method in case of failure. 1818 set_last_compile(thread, method, is_osr, task_level); 1819 1820 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 1821 } 1822 1823 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 1824 if (should_log && !directive->LogOption) { 1825 should_log = false; 1826 } 1827 1828 // Allocate a new set of JNI handles. 1829 push_jni_handle_block(); 1830 Method* target_handle = task->method(); 1831 int compilable = ciEnv::MethodCompilable; 1832 const char* failure_reason = NULL; 1833 const char* retry_message = NULL; 1834 1835 int system_dictionary_modification_counter; 1836 { 1837 MutexLocker locker(Compile_lock, thread); 1838 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1839 } 1840 1841 #if INCLUDE_JVMCI 1842 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 1843 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 1844 1845 TraceTime t1("compilation", &time); 1846 EventCompilation event; 1847 1848 JVMCIEnv env(task, system_dictionary_modification_counter); 1849 methodHandle method(thread, target_handle); 1850 jvmci->compile_method(method, osr_bci, &env); 1851 1852 post_compile(thread, task, event, task->code() != NULL, NULL); 1853 1854 failure_reason = env.failure_reason(); 1855 if (!env.retryable()) { 1856 retry_message = "not retryable"; 1857 compilable = ciEnv::MethodCompilable_not_at_tier; 1858 } 1859 1860 } else 1861 #endif // INCLUDE_JVMCI 1862 { 1863 NoHandleMark nhm; 1864 ThreadToNativeFromVM ttn(thread); 1865 1866 ciEnv ci_env(task, system_dictionary_modification_counter); 1867 if (should_break) { 1868 ci_env.set_break_at_compile(true); 1869 } 1870 if (should_log) { 1871 ci_env.set_log(thread->log()); 1872 } 1873 assert(thread->env() == &ci_env, "set by ci_env"); 1874 // The thread-env() field is cleared in ~CompileTaskWrapper. 1875 1876 // Cache Jvmti state 1877 ci_env.cache_jvmti_state(); 1878 1879 // Cache DTrace flags 1880 ci_env.cache_dtrace_flags(); 1881 1882 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1883 1884 TraceTime t1("compilation", &time); 1885 EventCompilation event; 1886 1887 if (comp == NULL) { 1888 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 1889 } else { 1890 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 1891 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 1892 while (WhiteBox::compilation_locked) { 1893 locker.wait(Mutex::_no_safepoint_check_flag); 1894 } 1895 } 1896 comp->compile_method(&ci_env, target, osr_bci, directive); 1897 } 1898 1899 if (!ci_env.failing() && task->code() == NULL) { 1900 //assert(false, "compiler should always document failure"); 1901 // The compiler elected, without comment, not to register a result. 1902 // Do not attempt further compilations of this method. 1903 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1904 } 1905 1906 // Copy this bit to the enclosing block: 1907 compilable = ci_env.compilable(); 1908 1909 if (ci_env.failing()) { 1910 failure_reason = ci_env.failure_reason(); 1911 retry_message = ci_env.retry_message(); 1912 ci_env.report_failure(failure_reason); 1913 } 1914 1915 post_compile(thread, task, event, !ci_env.failing(), &ci_env); 1916 } 1917 // Remove the JNI handle block after the ciEnv destructor has run in 1918 // the previous block. 1919 pop_jni_handle_block(); 1920 1921 if (failure_reason != NULL) { 1922 task->set_failure_reason(failure_reason); 1923 if (_compilation_log != NULL) { 1924 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 1925 } 1926 if (PrintCompilation) { 1927 FormatBufferResource msg = retry_message != NULL ? 1928 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 1929 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 1930 task->print(tty, msg); 1931 } 1932 } 1933 1934 methodHandle method(thread, task->method()); 1935 1936 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 1937 1938 collect_statistics(thread, time, task); 1939 1940 nmethod* nm = task->code(); 1941 if (nm != NULL) { 1942 nm->maybe_print_nmethod(directive); 1943 } 1944 DirectivesStack::release(directive); 1945 1946 if (PrintCompilation && PrintCompilation2) { 1947 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 1948 tty->print("%4d ", compile_id); // print compilation number 1949 tty->print("%s ", (is_osr ? "%" : " ")); 1950 if (task->code() != NULL) { 1951 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 1952 } 1953 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 1954 } 1955 1956 if (PrintCodeCacheOnCompilation) 1957 codecache_print(/* detailed= */ false); 1958 1959 // Disable compilation, if required. 1960 switch (compilable) { 1961 case ciEnv::MethodCompilable_never: 1962 if (is_osr) 1963 method->set_not_osr_compilable_quietly(); 1964 else 1965 method->set_not_compilable_quietly(); 1966 break; 1967 case ciEnv::MethodCompilable_not_at_tier: 1968 if (is_osr) 1969 method->set_not_osr_compilable_quietly(task_level); 1970 else 1971 method->set_not_compilable_quietly(task_level); 1972 break; 1973 } 1974 1975 // Note that the queued_for_compilation bits are cleared without 1976 // protection of a mutex. [They were set by the requester thread, 1977 // when adding the task to the compile queue -- at which time the 1978 // compile queue lock was held. Subsequently, we acquired the compile 1979 // queue lock to get this task off the compile queue; thus (to belabour 1980 // the point somewhat) our clearing of the bits must be occurring 1981 // only after the setting of the bits. See also 14012000 above. 1982 method->clear_queued_for_compilation(); 1983 1984 #ifdef ASSERT 1985 if (CollectedHeap::fired_fake_oom()) { 1986 // The current compile received a fake OOM during compilation so 1987 // go ahead and exit the VM since the test apparently succeeded 1988 tty->print_cr("*** Shutting down VM after successful fake OOM"); 1989 vm_exit(0); 1990 } 1991 #endif 1992 } 1993 1994 /** 1995 * The CodeCache is full. Print warning and disable compilation. 1996 * Schedule code cache cleaning so compilation can continue later. 1997 * This function needs to be called only from CodeCache::allocate(), 1998 * since we currently handle a full code cache uniformly. 1999 */ 2000 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2001 UseInterpreter = true; 2002 if (UseCompiler || AlwaysCompileLoopMethods ) { 2003 if (xtty != NULL) { 2004 ResourceMark rm; 2005 stringStream s; 2006 // Dump code cache state into a buffer before locking the tty, 2007 // because log_state() will use locks causing lock conflicts. 2008 CodeCache::log_state(&s); 2009 // Lock to prevent tearing 2010 ttyLocker ttyl; 2011 xtty->begin_elem("code_cache_full"); 2012 xtty->print("%s", s.as_string()); 2013 xtty->stamp(); 2014 xtty->end_elem(); 2015 } 2016 2017 #ifndef PRODUCT 2018 if (CompileTheWorld || ExitOnFullCodeCache) { 2019 codecache_print(/* detailed= */ true); 2020 before_exit(JavaThread::current()); 2021 exit_globals(); // will delete tty 2022 vm_direct_exit(CompileTheWorld ? 0 : 1); 2023 } 2024 #endif 2025 if (UseCodeCacheFlushing) { 2026 // Since code cache is full, immediately stop new compiles 2027 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2028 NMethodSweeper::log_sweep("disable_compiler"); 2029 } 2030 } else { 2031 disable_compilation_forever(); 2032 } 2033 2034 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2035 } 2036 } 2037 2038 // ------------------------------------------------------------------ 2039 // CompileBroker::set_last_compile 2040 // 2041 // Record this compilation for debugging purposes. 2042 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2043 ResourceMark rm; 2044 char* method_name = method->name()->as_C_string(); 2045 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2046 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2047 char current_method[CompilerCounters::cmname_buffer_length]; 2048 size_t maxLen = CompilerCounters::cmname_buffer_length; 2049 2050 if (UsePerfData) { 2051 const char* class_name = method->method_holder()->name()->as_C_string(); 2052 2053 size_t s1len = strlen(class_name); 2054 size_t s2len = strlen(method_name); 2055 2056 // check if we need to truncate the string 2057 if (s1len + s2len + 2 > maxLen) { 2058 2059 // the strategy is to lop off the leading characters of the 2060 // class name and the trailing characters of the method name. 2061 2062 if (s2len + 2 > maxLen) { 2063 // lop of the entire class name string, let snprintf handle 2064 // truncation of the method name. 2065 class_name += s1len; // null string 2066 } 2067 else { 2068 // lop off the extra characters from the front of the class name 2069 class_name += ((s1len + s2len + 2) - maxLen); 2070 } 2071 } 2072 2073 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2074 } 2075 2076 if (CICountOSR && is_osr) { 2077 _last_compile_type = osr_compile; 2078 } else { 2079 _last_compile_type = normal_compile; 2080 } 2081 _last_compile_level = comp_level; 2082 2083 if (UsePerfData) { 2084 CompilerCounters* counters = thread->counters(); 2085 counters->set_current_method(current_method); 2086 counters->set_compile_type((jlong)_last_compile_type); 2087 } 2088 } 2089 2090 2091 // ------------------------------------------------------------------ 2092 // CompileBroker::push_jni_handle_block 2093 // 2094 // Push on a new block of JNI handles. 2095 void CompileBroker::push_jni_handle_block() { 2096 JavaThread* thread = JavaThread::current(); 2097 2098 // Allocate a new block for JNI handles. 2099 // Inlined code from jni_PushLocalFrame() 2100 JNIHandleBlock* java_handles = thread->active_handles(); 2101 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2102 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2103 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2104 thread->set_active_handles(compile_handles); 2105 } 2106 2107 2108 // ------------------------------------------------------------------ 2109 // CompileBroker::pop_jni_handle_block 2110 // 2111 // Pop off the current block of JNI handles. 2112 void CompileBroker::pop_jni_handle_block() { 2113 JavaThread* thread = JavaThread::current(); 2114 2115 // Release our JNI handle block 2116 JNIHandleBlock* compile_handles = thread->active_handles(); 2117 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2118 thread->set_active_handles(java_handles); 2119 compile_handles->set_pop_frame_link(NULL); 2120 JNIHandleBlock::release_block(compile_handles, thread); // may block 2121 } 2122 2123 // ------------------------------------------------------------------ 2124 // CompileBroker::collect_statistics 2125 // 2126 // Collect statistics about the compilation. 2127 2128 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2129 bool success = task->is_success(); 2130 methodHandle method (thread, task->method()); 2131 uint compile_id = task->compile_id(); 2132 bool is_osr = (task->osr_bci() != standard_entry_bci); 2133 nmethod* code = task->code(); 2134 CompilerCounters* counters = thread->counters(); 2135 2136 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2137 MutexLocker locker(CompileStatistics_lock); 2138 2139 // _perf variables are production performance counters which are 2140 // updated regardless of the setting of the CITime and CITimeEach flags 2141 // 2142 2143 // account all time, including bailouts and failures in this counter; 2144 // C1 and C2 counters are counting both successful and unsuccessful compiles 2145 _t_total_compilation.add(time); 2146 2147 if (!success) { 2148 _total_bailout_count++; 2149 if (UsePerfData) { 2150 _perf_last_failed_method->set_value(counters->current_method()); 2151 _perf_last_failed_type->set_value(counters->compile_type()); 2152 _perf_total_bailout_count->inc(); 2153 } 2154 _t_bailedout_compilation.add(time); 2155 } else if (code == NULL) { 2156 if (UsePerfData) { 2157 _perf_last_invalidated_method->set_value(counters->current_method()); 2158 _perf_last_invalidated_type->set_value(counters->compile_type()); 2159 _perf_total_invalidated_count->inc(); 2160 } 2161 _total_invalidated_count++; 2162 _t_invalidated_compilation.add(time); 2163 } else { 2164 // Compilation succeeded 2165 2166 // update compilation ticks - used by the implementation of 2167 // java.lang.management.CompilationMBean 2168 _perf_total_compilation->inc(time.ticks()); 2169 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2170 2171 if (CITime) { 2172 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2173 if (is_osr) { 2174 _t_osr_compilation.add(time); 2175 _sum_osr_bytes_compiled += bytes_compiled; 2176 } else { 2177 _t_standard_compilation.add(time); 2178 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2179 } 2180 2181 #if INCLUDE_JVMCI 2182 AbstractCompiler* comp = compiler(task->comp_level()); 2183 if (comp) { 2184 CompilerStatistics* stats = comp->stats(); 2185 if (stats) { 2186 if (is_osr) { 2187 stats->_osr.update(time, bytes_compiled); 2188 } else { 2189 stats->_standard.update(time, bytes_compiled); 2190 } 2191 stats->_nmethods_size += code->total_size(); 2192 stats->_nmethods_code_size += code->insts_size(); 2193 } else { // if (!stats) 2194 assert(false, "Compiler statistics object must exist"); 2195 } 2196 } else { // if (!comp) 2197 assert(false, "Compiler object must exist"); 2198 } 2199 #endif // INCLUDE_JVMCI 2200 } 2201 2202 if (UsePerfData) { 2203 // save the name of the last method compiled 2204 _perf_last_method->set_value(counters->current_method()); 2205 _perf_last_compile_type->set_value(counters->compile_type()); 2206 _perf_last_compile_size->set_value(method->code_size() + 2207 task->num_inlined_bytecodes()); 2208 if (is_osr) { 2209 _perf_osr_compilation->inc(time.ticks()); 2210 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2211 } else { 2212 _perf_standard_compilation->inc(time.ticks()); 2213 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2214 } 2215 } 2216 2217 if (CITimeEach) { 2218 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2219 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2220 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2221 } 2222 2223 // Collect counts of successful compilations 2224 _sum_nmethod_size += code->total_size(); 2225 _sum_nmethod_code_size += code->insts_size(); 2226 _total_compile_count++; 2227 2228 if (UsePerfData) { 2229 _perf_sum_nmethod_size->inc( code->total_size()); 2230 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2231 _perf_total_compile_count->inc(); 2232 } 2233 2234 if (is_osr) { 2235 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2236 _total_osr_compile_count++; 2237 } else { 2238 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2239 _total_standard_compile_count++; 2240 } 2241 } 2242 // set the current method for the thread to null 2243 if (UsePerfData) counters->set_current_method(""); 2244 } 2245 2246 const char* CompileBroker::compiler_name(int comp_level) { 2247 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2248 if (comp == NULL) { 2249 return "no compiler"; 2250 } else { 2251 return (comp->name()); 2252 } 2253 } 2254 2255 #if INCLUDE_JVMCI 2256 void CompileBroker::print_times(AbstractCompiler* comp) { 2257 CompilerStatistics* stats = comp->stats(); 2258 if (stats) { 2259 tty->print_cr(" %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}", 2260 comp->name(), stats->bytes_per_second(), 2261 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2262 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2263 stats->_nmethods_size, stats->_nmethods_code_size); 2264 } else { // if (!stats) 2265 assert(false, "Compiler statistics object must exist"); 2266 } 2267 comp->print_timers(); 2268 } 2269 #endif // INCLUDE_JVMCI 2270 2271 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2272 #if INCLUDE_JVMCI 2273 elapsedTimer standard_compilation; 2274 elapsedTimer total_compilation; 2275 elapsedTimer osr_compilation; 2276 2277 int standard_bytes_compiled = 0; 2278 int osr_bytes_compiled = 0; 2279 2280 int standard_compile_count = 0; 2281 int osr_compile_count = 0; 2282 int total_compile_count = 0; 2283 2284 int nmethods_size = 0; 2285 int nmethods_code_size = 0; 2286 bool printedHeader = false; 2287 2288 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2289 AbstractCompiler* comp = _compilers[i]; 2290 if (comp != NULL) { 2291 if (per_compiler && aggregate && !printedHeader) { 2292 printedHeader = true; 2293 tty->cr(); 2294 tty->print_cr("Individual compiler times (for compiled methods only)"); 2295 tty->print_cr("------------------------------------------------"); 2296 tty->cr(); 2297 } 2298 CompilerStatistics* stats = comp->stats(); 2299 2300 if (stats) { 2301 standard_compilation.add(stats->_standard._time); 2302 osr_compilation.add(stats->_osr._time); 2303 2304 standard_bytes_compiled += stats->_standard._bytes; 2305 osr_bytes_compiled += stats->_osr._bytes; 2306 2307 standard_compile_count += stats->_standard._count; 2308 osr_compile_count += stats->_osr._count; 2309 2310 nmethods_size += stats->_nmethods_size; 2311 nmethods_code_size += stats->_nmethods_code_size; 2312 } else { // if (!stats) 2313 assert(false, "Compiler statistics object must exist"); 2314 } 2315 2316 if (per_compiler) { 2317 print_times(comp); 2318 } 2319 } 2320 } 2321 total_compile_count = osr_compile_count + standard_compile_count; 2322 total_compilation.add(osr_compilation); 2323 total_compilation.add(standard_compilation); 2324 2325 // In hosted mode, print the JVMCI compiler specific counters manually. 2326 if (!UseJVMCICompiler) { 2327 JVMCICompiler::print_compilation_timers(); 2328 } 2329 #else // INCLUDE_JVMCI 2330 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2331 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2332 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2333 2334 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2335 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2336 2337 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2338 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2339 int total_compile_count = CompileBroker::_total_compile_count; 2340 2341 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2342 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2343 #endif // INCLUDE_JVMCI 2344 2345 if (!aggregate) { 2346 return; 2347 } 2348 tty->cr(); 2349 tty->print_cr("Accumulated compiler times"); 2350 tty->print_cr("----------------------------------------------------------"); 2351 //0000000000111111111122222222223333333333444444444455555555556666666666 2352 //0123456789012345678901234567890123456789012345678901234567890123456789 2353 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2354 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2355 standard_compilation.seconds(), 2356 standard_compilation.seconds() / standard_compile_count); 2357 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2358 CompileBroker::_t_bailedout_compilation.seconds(), 2359 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2360 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2361 osr_compilation.seconds(), 2362 osr_compilation.seconds() / osr_compile_count); 2363 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2364 CompileBroker::_t_invalidated_compilation.seconds(), 2365 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2366 2367 AbstractCompiler *comp = compiler(CompLevel_simple); 2368 if (comp != NULL) { 2369 tty->cr(); 2370 comp->print_timers(); 2371 } 2372 comp = compiler(CompLevel_full_optimization); 2373 if (comp != NULL) { 2374 tty->cr(); 2375 comp->print_timers(); 2376 } 2377 tty->cr(); 2378 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2379 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2380 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2381 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2382 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2383 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2384 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2385 double tcs = total_compilation.seconds(); 2386 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2387 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2388 tty->cr(); 2389 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2390 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2391 } 2392 2393 // Debugging output for failure 2394 void CompileBroker::print_last_compile() { 2395 if (_last_compile_level != CompLevel_none && 2396 compiler(_last_compile_level) != NULL && 2397 _last_compile_type != no_compile) { 2398 if (_last_compile_type == osr_compile) { 2399 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2400 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2401 } else { 2402 tty->print_cr("Last parse: %d+++(%d) %s", 2403 _compilation_id, _last_compile_level, _last_method_compiled); 2404 } 2405 } 2406 } 2407