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