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