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