1 /* 2 * Copyright (c) 1999, 2018, 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 "jvm.h" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "code/codeHeapState.hpp" 32 #include "code/dependencyContext.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "compiler/compileLog.hpp" 35 #include "compiler/compilerOracle.hpp" 36 #include "compiler/directivesParser.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "jfr/jfrEvents.hpp" 39 #include "logging/log.hpp" 40 #include "logging/logStream.hpp" 41 #include "memory/allocation.inline.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "oops/methodData.hpp" 44 #include "oops/method.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "prims/whitebox.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/atomic.hpp" 50 #include "runtime/compilationPolicy.hpp" 51 #include "runtime/init.hpp" 52 #include "runtime/interfaceSupport.inline.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/jniHandles.inline.hpp" 55 #include "runtime/os.hpp" 56 #include "runtime/safepointVerifiers.hpp" 57 #include "runtime/sharedRuntime.hpp" 58 #include "runtime/sweeper.hpp" 59 #include "runtime/timerTrace.hpp" 60 #include "runtime/vframe.inline.hpp" 61 #include "utilities/debug.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/events.hpp" 64 #include "utilities/formatBuffer.hpp" 65 #include "utilities/macros.hpp" 66 #ifdef COMPILER1 67 #include "c1/c1_Compiler.hpp" 68 #endif 69 #if INCLUDE_JVMCI 70 #include "jvmci/jvmciCompiler.hpp" 71 #include "jvmci/jvmciRuntime.hpp" 72 #include "jvmci/jvmciJavaClasses.hpp" 73 #include "runtime/vframe.hpp" 74 #endif 75 #ifdef COMPILER2 76 #include "opto/c2compiler.hpp" 77 #endif 78 79 #ifdef DTRACE_ENABLED 80 81 // Only bother with this argument setup if dtrace is available 82 83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 84 { \ 85 Symbol* klass_name = (method)->klass_name(); \ 86 Symbol* name = (method)->name(); \ 87 Symbol* signature = (method)->signature(); \ 88 HOTSPOT_METHOD_COMPILE_BEGIN( \ 89 (char *) comp_name, strlen(comp_name), \ 90 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 91 (char *) name->bytes(), name->utf8_length(), \ 92 (char *) signature->bytes(), signature->utf8_length()); \ 93 } 94 95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 96 { \ 97 Symbol* klass_name = (method)->klass_name(); \ 98 Symbol* name = (method)->name(); \ 99 Symbol* signature = (method)->signature(); \ 100 HOTSPOT_METHOD_COMPILE_END( \ 101 (char *) comp_name, strlen(comp_name), \ 102 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 103 (char *) name->bytes(), name->utf8_length(), \ 104 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 105 } 106 107 #else // ndef DTRACE_ENABLED 108 109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 111 112 #endif // ndef DTRACE_ENABLED 113 114 bool CompileBroker::_initialized = false; 115 volatile bool CompileBroker::_should_block = false; 116 volatile int CompileBroker::_print_compilation_warning = 0; 117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 118 119 // The installed compiler(s) 120 AbstractCompiler* CompileBroker::_compilers[2]; 121 122 // The maximum numbers of compiler threads to be determined during startup. 123 int CompileBroker::_c1_count = 0; 124 int CompileBroker::_c2_count = 0; 125 126 // An array of compiler names as Java String objects 127 jobject* CompileBroker::_compiler1_objects = NULL; 128 jobject* CompileBroker::_compiler2_objects = NULL; 129 130 CompileLog** CompileBroker::_compiler1_logs = NULL; 131 CompileLog** CompileBroker::_compiler2_logs = NULL; 132 133 // These counters are used to assign an unique ID to each compilation. 134 volatile jint CompileBroker::_compilation_id = 0; 135 volatile jint CompileBroker::_osr_compilation_id = 0; 136 137 // Debugging information 138 int CompileBroker::_last_compile_type = no_compile; 139 int CompileBroker::_last_compile_level = CompLevel_none; 140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 141 142 // Performance counters 143 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 146 147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 152 153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 157 158 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 165 166 // Timers and counters for generating statistics 167 elapsedTimer CompileBroker::_t_total_compilation; 168 elapsedTimer CompileBroker::_t_osr_compilation; 169 elapsedTimer CompileBroker::_t_standard_compilation; 170 elapsedTimer CompileBroker::_t_invalidated_compilation; 171 elapsedTimer CompileBroker::_t_bailedout_compilation; 172 173 int CompileBroker::_total_bailout_count = 0; 174 int CompileBroker::_total_invalidated_count = 0; 175 int CompileBroker::_total_compile_count = 0; 176 int CompileBroker::_total_osr_compile_count = 0; 177 int CompileBroker::_total_standard_compile_count = 0; 178 int CompileBroker::_total_compiler_stopped_count = 0; 179 int CompileBroker::_total_compiler_restarted_count = 0; 180 181 int CompileBroker::_sum_osr_bytes_compiled = 0; 182 int CompileBroker::_sum_standard_bytes_compiled = 0; 183 int CompileBroker::_sum_nmethod_size = 0; 184 int CompileBroker::_sum_nmethod_code_size = 0; 185 186 long CompileBroker::_peak_compilation_time = 0; 187 188 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 189 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 190 191 192 193 class CompilationLog : public StringEventLog { 194 public: 195 CompilationLog() : StringEventLog("Compilation events") { 196 } 197 198 void log_compile(JavaThread* thread, CompileTask* task) { 199 StringLogMessage lm; 200 stringStream sstr = lm.stream(); 201 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 202 task->print(&sstr, NULL, true, false); 203 log(thread, "%s", (const char*)lm); 204 } 205 206 void log_nmethod(JavaThread* thread, nmethod* nm) { 207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 208 nm->compile_id(), nm->is_osr_method() ? "%" : "", 209 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 210 } 211 212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 213 StringLogMessage lm; 214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 215 if (retry_message != NULL) { 216 lm.append(" (%s)", retry_message); 217 } 218 lm.print("\n"); 219 log(thread, "%s", (const char*)lm); 220 } 221 222 void log_metaspace_failure(const char* reason) { 223 ResourceMark rm; 224 StringLogMessage lm; 225 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 226 lm.print("\n"); 227 log(JavaThread::current(), "%s", (const char*)lm); 228 } 229 }; 230 231 static CompilationLog* _compilation_log = NULL; 232 233 bool compileBroker_init() { 234 if (LogEvents) { 235 _compilation_log = new CompilationLog(); 236 } 237 238 // init directives stack, adding default directive 239 DirectivesStack::init(); 240 241 if (DirectivesParser::has_file()) { 242 return DirectivesParser::parse_from_flag(); 243 } else if (CompilerDirectivesPrint) { 244 // Print default directive even when no other was added 245 DirectivesStack::print(tty); 246 } 247 248 return true; 249 } 250 251 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 252 CompilerThread* thread = CompilerThread::current(); 253 thread->set_task(task); 254 #if INCLUDE_JVMCI 255 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 256 task->set_jvmci_compiler_thread(thread); 257 } 258 #endif 259 CompileLog* log = thread->log(); 260 if (log != NULL) task->log_task_start(log); 261 } 262 263 CompileTaskWrapper::~CompileTaskWrapper() { 264 CompilerThread* thread = CompilerThread::current(); 265 CompileTask* task = thread->task(); 266 CompileLog* log = thread->log(); 267 if (log != NULL) task->log_task_done(log); 268 thread->set_task(NULL); 269 task->set_code_handle(NULL); 270 thread->set_env(NULL); 271 if (task->is_blocking()) { 272 bool free_task = false; 273 { 274 MutexLocker notifier(task->lock(), thread); 275 task->mark_complete(); 276 #if INCLUDE_JVMCI 277 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 278 if (!task->has_waiter()) { 279 // The waiting thread timed out and thus did not free the task. 280 free_task = true; 281 } 282 task->set_jvmci_compiler_thread(NULL); 283 } 284 #endif 285 if (!free_task) { 286 // Notify the waiting thread that the compilation has completed 287 // so that it can free the task. 288 task->lock()->notify_all(); 289 } 290 } 291 if (free_task) { 292 // The task can only be freed once the task lock is released. 293 CompileTask::free(task); 294 } 295 } else { 296 task->mark_complete(); 297 298 // By convention, the compiling thread is responsible for 299 // recycling a non-blocking CompileTask. 300 CompileTask::free(task); 301 } 302 } 303 304 /** 305 * Check if a CompilerThread can be removed and update count if requested. 306 */ 307 static bool can_remove(CompilerThread *ct, bool do_it) { 308 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 309 if (!ReduceNumberOfCompilerThreads) return false; 310 311 AbstractCompiler *compiler = ct->compiler(); 312 int compiler_count = compiler->num_compiler_threads(); 313 bool c1 = compiler->is_c1(); 314 315 // Keep at least 1 compiler thread of each type. 316 if (compiler_count < 2) return false; 317 318 // Keep thread alive for at least some time. 319 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 320 321 // We only allow the last compiler thread of each type to get removed. 322 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1) 323 : CompileBroker::compiler2_object(compiler_count - 1); 324 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) { 325 if (do_it) { 326 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 327 compiler->set_num_compiler_threads(compiler_count - 1); 328 } 329 return true; 330 } 331 return false; 332 } 333 334 /** 335 * Add a CompileTask to a CompileQueue. 336 */ 337 void CompileQueue::add(CompileTask* task) { 338 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 339 340 task->set_next(NULL); 341 task->set_prev(NULL); 342 343 if (_last == NULL) { 344 // The compile queue is empty. 345 assert(_first == NULL, "queue is empty"); 346 _first = task; 347 _last = task; 348 } else { 349 // Append the task to the queue. 350 assert(_last->next() == NULL, "not last"); 351 _last->set_next(task); 352 task->set_prev(_last); 353 _last = task; 354 } 355 ++_size; 356 357 // Mark the method as being in the compile queue. 358 task->method()->set_queued_for_compilation(); 359 360 if (CIPrintCompileQueue) { 361 print_tty(); 362 } 363 364 if (LogCompilation && xtty != NULL) { 365 task->log_task_queued(); 366 } 367 368 // Notify CompilerThreads that a task is available. 369 MethodCompileQueue_lock->notify_all(); 370 } 371 372 /** 373 * Empties compilation queue by putting all compilation tasks onto 374 * a freelist. Furthermore, the method wakes up all threads that are 375 * waiting on a compilation task to finish. This can happen if background 376 * compilation is disabled. 377 */ 378 void CompileQueue::free_all() { 379 MutexLocker mu(MethodCompileQueue_lock); 380 CompileTask* next = _first; 381 382 // Iterate over all tasks in the compile queue 383 while (next != NULL) { 384 CompileTask* current = next; 385 next = current->next(); 386 { 387 // Wake up thread that blocks on the compile task. 388 MutexLocker ct_lock(current->lock()); 389 current->lock()->notify(); 390 } 391 // Put the task back on the freelist. 392 CompileTask::free(current); 393 } 394 _first = NULL; 395 396 // Wake up all threads that block on the queue. 397 MethodCompileQueue_lock->notify_all(); 398 } 399 400 /** 401 * Get the next CompileTask from a CompileQueue 402 */ 403 CompileTask* CompileQueue::get() { 404 // save methods from RedefineClasses across safepoint 405 // across MethodCompileQueue_lock below. 406 methodHandle save_method; 407 methodHandle save_hot_method; 408 409 MutexLocker locker(MethodCompileQueue_lock); 410 // If _first is NULL we have no more compile jobs. There are two reasons for 411 // having no compile jobs: First, we compiled everything we wanted. Second, 412 // we ran out of code cache so compilation has been disabled. In the latter 413 // case we perform code cache sweeps to free memory such that we can re-enable 414 // compilation. 415 while (_first == NULL) { 416 // Exit loop if compilation is disabled forever 417 if (CompileBroker::is_compilation_disabled_forever()) { 418 return NULL; 419 } 420 421 // If there are no compilation tasks and we can compile new jobs 422 // (i.e., there is enough free space in the code cache) there is 423 // no need to invoke the sweeper. As a result, the hotness of methods 424 // remains unchanged. This behavior is desired, since we want to keep 425 // the stable state, i.e., we do not want to evict methods from the 426 // code cache if it is unnecessary. 427 // We need a timed wait here, since compiler threads can exit if compilation 428 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 429 // is not critical and we do not want idle compiler threads to wake up too often. 430 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 431 432 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 433 // Still nothing to compile. Give caller a chance to stop this thread. 434 if (can_remove(CompilerThread::current(), false)) return NULL; 435 } 436 } 437 438 if (CompileBroker::is_compilation_disabled_forever()) { 439 return NULL; 440 } 441 442 CompileTask* task; 443 { 444 NoSafepointVerifier nsv; 445 task = CompilationPolicy::policy()->select_task(this); 446 } 447 448 if (task != NULL) { 449 // Save method pointers across unlock safepoint. The task is removed from 450 // the compilation queue, which is walked during RedefineClasses. 451 save_method = methodHandle(task->method()); 452 save_hot_method = methodHandle(task->hot_method()); 453 454 remove(task); 455 purge_stale_tasks(); // may temporarily release MCQ lock 456 } 457 458 return task; 459 } 460 461 // Clean & deallocate stale compile tasks. 462 // Temporarily releases MethodCompileQueue lock. 463 void CompileQueue::purge_stale_tasks() { 464 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 465 if (_first_stale != NULL) { 466 // Stale tasks are purged when MCQ lock is released, 467 // but _first_stale updates are protected by MCQ lock. 468 // Once task processing starts and MCQ lock is released, 469 // other compiler threads can reuse _first_stale. 470 CompileTask* head = _first_stale; 471 _first_stale = NULL; 472 { 473 MutexUnlocker ul(MethodCompileQueue_lock); 474 for (CompileTask* task = head; task != NULL; ) { 475 CompileTask* next_task = task->next(); 476 CompileTaskWrapper ctw(task); // Frees the task 477 task->set_failure_reason("stale task"); 478 task = next_task; 479 } 480 } 481 } 482 } 483 484 void CompileQueue::remove(CompileTask* task) { 485 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 486 if (task->prev() != NULL) { 487 task->prev()->set_next(task->next()); 488 } else { 489 // max is the first element 490 assert(task == _first, "Sanity"); 491 _first = task->next(); 492 } 493 494 if (task->next() != NULL) { 495 task->next()->set_prev(task->prev()); 496 } else { 497 // max is the last element 498 assert(task == _last, "Sanity"); 499 _last = task->prev(); 500 } 501 --_size; 502 } 503 504 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 505 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 506 remove(task); 507 508 // Enqueue the task for reclamation (should be done outside MCQ lock) 509 task->set_next(_first_stale); 510 task->set_prev(NULL); 511 _first_stale = task; 512 } 513 514 // methods in the compile queue need to be marked as used on the stack 515 // so that they don't get reclaimed by Redefine Classes 516 void CompileQueue::mark_on_stack() { 517 CompileTask* task = _first; 518 while (task != NULL) { 519 task->mark_on_stack(); 520 task = task->next(); 521 } 522 } 523 524 525 CompileQueue* CompileBroker::compile_queue(int comp_level) { 526 if (is_c2_compile(comp_level)) return _c2_compile_queue; 527 if (is_c1_compile(comp_level)) return _c1_compile_queue; 528 return NULL; 529 } 530 531 void CompileBroker::print_compile_queues(outputStream* st) { 532 st->print_cr("Current compiles: "); 533 MutexLocker locker(MethodCompileQueue_lock); 534 535 char buf[2000]; 536 int buflen = sizeof(buf); 537 Threads::print_threads_compiling(st, buf, buflen); 538 539 st->cr(); 540 if (_c1_compile_queue != NULL) { 541 _c1_compile_queue->print(st); 542 } 543 if (_c2_compile_queue != NULL) { 544 _c2_compile_queue->print(st); 545 } 546 } 547 548 void CompileQueue::print(outputStream* st) { 549 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 550 st->print_cr("%s:", name()); 551 CompileTask* task = _first; 552 if (task == NULL) { 553 st->print_cr("Empty"); 554 } else { 555 while (task != NULL) { 556 task->print(st, NULL, true, true); 557 task = task->next(); 558 } 559 } 560 st->cr(); 561 } 562 563 void CompileQueue::print_tty() { 564 ttyLocker ttyl; 565 print(tty); 566 } 567 568 CompilerCounters::CompilerCounters() { 569 _current_method[0] = '\0'; 570 _compile_type = CompileBroker::no_compile; 571 } 572 573 // ------------------------------------------------------------------ 574 // CompileBroker::compilation_init 575 // 576 // Initialize the Compilation object 577 void CompileBroker::compilation_init_phase1(TRAPS) { 578 _last_method_compiled[0] = '\0'; 579 580 // No need to initialize compilation system if we do not use it. 581 if (!UseCompiler) { 582 return; 583 } 584 // Set the interface to the current compiler(s). 585 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 586 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 587 588 #if INCLUDE_JVMCI 589 if (EnableJVMCI) { 590 // This is creating a JVMCICompiler singleton. 591 JVMCICompiler* jvmci = new JVMCICompiler(); 592 593 if (UseJVMCICompiler) { 594 _compilers[1] = jvmci; 595 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 596 if (BootstrapJVMCI) { 597 // JVMCI will bootstrap so give it more threads 598 _c2_count = MIN2(32, os::active_processor_count()); 599 } 600 } else { 601 _c2_count = JVMCIThreads; 602 } 603 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 604 } else { 605 _c1_count = JVMCIHostThreads; 606 } 607 } 608 } 609 #endif // INCLUDE_JVMCI 610 611 #ifdef COMPILER1 612 if (_c1_count > 0) { 613 _compilers[0] = new Compiler(); 614 } 615 #endif // COMPILER1 616 617 #ifdef COMPILER2 618 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 619 if (_c2_count > 0) { 620 _compilers[1] = new C2Compiler(); 621 } 622 } 623 #endif // COMPILER2 624 625 // Start the compiler thread(s) and the sweeper thread 626 init_compiler_sweeper_threads(); 627 // totalTime performance counter is always created as it is required 628 // by the implementation of java.lang.management.CompilationMBean. 629 { 630 EXCEPTION_MARK; 631 _perf_total_compilation = 632 PerfDataManager::create_counter(JAVA_CI, "totalTime", 633 PerfData::U_Ticks, CHECK); 634 } 635 636 if (UsePerfData) { 637 638 EXCEPTION_MARK; 639 640 // create the jvmstat performance counters 641 _perf_osr_compilation = 642 PerfDataManager::create_counter(SUN_CI, "osrTime", 643 PerfData::U_Ticks, CHECK); 644 645 _perf_standard_compilation = 646 PerfDataManager::create_counter(SUN_CI, "standardTime", 647 PerfData::U_Ticks, CHECK); 648 649 _perf_total_bailout_count = 650 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 651 PerfData::U_Events, CHECK); 652 653 _perf_total_invalidated_count = 654 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 655 PerfData::U_Events, CHECK); 656 657 _perf_total_compile_count = 658 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 659 PerfData::U_Events, CHECK); 660 _perf_total_osr_compile_count = 661 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 662 PerfData::U_Events, CHECK); 663 664 _perf_total_standard_compile_count = 665 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 666 PerfData::U_Events, CHECK); 667 668 _perf_sum_osr_bytes_compiled = 669 PerfDataManager::create_counter(SUN_CI, "osrBytes", 670 PerfData::U_Bytes, CHECK); 671 672 _perf_sum_standard_bytes_compiled = 673 PerfDataManager::create_counter(SUN_CI, "standardBytes", 674 PerfData::U_Bytes, CHECK); 675 676 _perf_sum_nmethod_size = 677 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 678 PerfData::U_Bytes, CHECK); 679 680 _perf_sum_nmethod_code_size = 681 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 682 PerfData::U_Bytes, CHECK); 683 684 _perf_last_method = 685 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 686 CompilerCounters::cmname_buffer_length, 687 "", CHECK); 688 689 _perf_last_failed_method = 690 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 691 CompilerCounters::cmname_buffer_length, 692 "", CHECK); 693 694 _perf_last_invalidated_method = 695 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 696 CompilerCounters::cmname_buffer_length, 697 "", CHECK); 698 699 _perf_last_compile_type = 700 PerfDataManager::create_variable(SUN_CI, "lastType", 701 PerfData::U_None, 702 (jlong)CompileBroker::no_compile, 703 CHECK); 704 705 _perf_last_compile_size = 706 PerfDataManager::create_variable(SUN_CI, "lastSize", 707 PerfData::U_Bytes, 708 (jlong)CompileBroker::no_compile, 709 CHECK); 710 711 712 _perf_last_failed_type = 713 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 714 PerfData::U_None, 715 (jlong)CompileBroker::no_compile, 716 CHECK); 717 718 _perf_last_invalidated_type = 719 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 720 PerfData::U_None, 721 (jlong)CompileBroker::no_compile, 722 CHECK); 723 } 724 } 725 726 // Completes compiler initialization. Compilation requests submitted 727 // prior to this will be silently ignored. 728 void CompileBroker::compilation_init_phase2() { 729 _initialized = true; 730 } 731 732 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) { 733 Handle string = java_lang_String::create_from_str(name, CHECK_NH); 734 Handle thread_group(THREAD, Universe::system_thread_group()); 735 return JavaCalls::construct_new_instance( 736 SystemDictionary::Thread_klass(), 737 vmSymbols::threadgroup_string_void_signature(), 738 thread_group, 739 string, 740 CHECK_NH); 741 } 742 743 744 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, 745 AbstractCompiler* comp, bool compiler_thread, TRAPS) { 746 JavaThread* thread = NULL; 747 { 748 MutexLocker mu(Threads_lock, THREAD); 749 if (compiler_thread) { 750 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { 751 CompilerCounters* counters = new CompilerCounters(); 752 thread = new CompilerThread(queue, counters); 753 } 754 } else { 755 thread = new CodeCacheSweeperThread(); 756 } 757 // At this point the new CompilerThread data-races with this startup 758 // thread (which I believe is the primoridal thread and NOT the VM 759 // thread). This means Java bytecodes being executed at startup can 760 // queue compile jobs which will run at whatever default priority the 761 // newly created CompilerThread runs at. 762 763 764 // At this point it may be possible that no osthread was created for the 765 // JavaThread due to lack of memory. We would have to throw an exception 766 // in that case. However, since this must work and we do not allow 767 // exceptions anyway, check and abort if this fails. But first release the 768 // lock. 769 770 if (thread != NULL && thread->osthread() != NULL) { 771 772 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread); 773 774 // Note that this only sets the JavaThread _priority field, which by 775 // definition is limited to Java priorities and not OS priorities. 776 // The os-priority is set in the CompilerThread startup code itself 777 778 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority); 779 780 // Note that we cannot call os::set_priority because it expects Java 781 // priorities and we are *explicitly* using OS priorities so that it's 782 // possible to set the compiler thread priority higher than any Java 783 // thread. 784 785 int native_prio = CompilerThreadPriority; 786 if (native_prio == -1) { 787 if (UseCriticalCompilerThreadPriority) { 788 native_prio = os::java_to_os_priority[CriticalPriority]; 789 } else { 790 native_prio = os::java_to_os_priority[NearMaxPriority]; 791 } 792 } 793 os::set_native_priority(thread, native_prio); 794 795 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle)); 796 797 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle)); 798 if (compiler_thread) { 799 thread->as_CompilerThread()->set_compiler(comp); 800 } 801 Threads::add(thread); 802 Thread::start(thread); 803 } 804 } 805 806 // First release lock before aborting VM. 807 if (thread == NULL || thread->osthread() == NULL) { 808 if (UseDynamicNumberOfCompilerThreads && comp->num_compiler_threads() > 0) { 809 if (thread != NULL) { 810 thread->smr_delete(); 811 } 812 return NULL; 813 } 814 vm_exit_during_initialization("java.lang.OutOfMemoryError", 815 os::native_thread_creation_failed_msg()); 816 } 817 818 // Let go of Threads_lock before yielding 819 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 820 821 return thread; 822 } 823 824 825 void CompileBroker::init_compiler_sweeper_threads() { 826 EXCEPTION_MARK; 827 #if !defined(ZERO) 828 assert(_c2_count > 0 || _c1_count > 0, "No compilers?"); 829 #endif // !ZERO 830 // Initialize the compilation queue 831 if (_c2_count > 0) { 832 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 833 _c2_compile_queue = new CompileQueue(name); 834 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler); 835 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler); 836 } 837 if (_c1_count > 0) { 838 _c1_compile_queue = new CompileQueue("C1 compile queue"); 839 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler); 840 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler); 841 } 842 843 char name_buffer[256]; 844 845 for (int i = 0; i < _c2_count; i++) { 846 // Create a name for our thread. 847 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 848 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD)); 849 _compiler2_objects[i] = thread_handle; 850 _compiler2_logs[i] = NULL; 851 852 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 853 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], /* compiler_thread */ true, CHECK); 854 assert(ct != NULL, "should have been handled for initial thread"); 855 _compilers[1]->set_num_compiler_threads(i + 1); 856 if (TraceCompilerThreads) { 857 ResourceMark rm; 858 MutexLocker mu(Threads_lock); 859 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 860 } 861 } 862 } 863 864 for (int i = 0; i < _c1_count; i++) { 865 // Create a name for our thread. 866 sprintf(name_buffer, "C1 CompilerThread%d", i); 867 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD)); 868 _compiler1_objects[i] = thread_handle; 869 _compiler1_logs[i] = NULL; 870 871 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 872 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], /* compiler_thread */ true, CHECK); 873 assert(ct != NULL, "should have been handled for initial thread"); 874 _compilers[0]->set_num_compiler_threads(i + 1); 875 if (TraceCompilerThreads) { 876 ResourceMark rm; 877 MutexLocker mu(Threads_lock); 878 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 879 } 880 } 881 } 882 883 if (UsePerfData) { 884 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 885 } 886 887 if (MethodFlushing) { 888 // Initialize the sweeper thread 889 jobject thread_handle = JNIHandles::make_local(THREAD, create_thread_oop("Sweeper thread", THREAD)()); 890 make_thread(thread_handle, NULL, NULL, /* compiler_thread */ false, CHECK); 891 } 892 } 893 894 void CompileBroker::possibly_add_compiler_threads() { 895 EXCEPTION_MARK; 896 897 julong available_memory = os::available_memory(); 898 // Only do attempt to start additional threads if the lock is free. 899 if (!CompileThread_lock->try_lock()) return; 900 901 if (_c2_compile_queue != NULL) { 902 int old_c2_count = _compilers[1]->num_compiler_threads(); 903 int new_c2_count = MIN3(_c2_count, 904 _c2_compile_queue->size() / 2, 905 (int)(available_memory / 200*M)); 906 907 for (int i = old_c2_count; i < new_c2_count; i++) { 908 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], true, CHECK); 909 if (ct == NULL) break; 910 _compilers[1]->set_num_compiler_threads(i + 1); 911 if (TraceCompilerThreads) { 912 ResourceMark rm; 913 MutexLocker mu(Threads_lock); 914 tty->print_cr("Added compiler thread %s (available memory: %dMB)", 915 ct->get_thread_name(), (int)(available_memory/M)); 916 } 917 } 918 } 919 920 if (_c1_compile_queue != NULL) { 921 int old_c1_count = _compilers[0]->num_compiler_threads(); 922 int new_c1_count = MIN3(_c1_count, 923 _c1_compile_queue->size() / 4, 924 (int)(available_memory / 100*M)); 925 926 for (int i = old_c1_count; i < new_c1_count; i++) { 927 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], true, CHECK); 928 if (ct == NULL) break; 929 _compilers[0]->set_num_compiler_threads(i + 1); 930 if (TraceCompilerThreads) { 931 ResourceMark rm; 932 MutexLocker mu(Threads_lock); 933 tty->print_cr("Added compiler thread %s (available memory: %dMB)", 934 ct->get_thread_name(), (int)(available_memory/M)); 935 } 936 } 937 } 938 939 CompileThread_lock->unlock(); 940 } 941 942 943 /** 944 * Set the methods on the stack as on_stack so that redefine classes doesn't 945 * reclaim them. This method is executed at a safepoint. 946 */ 947 void CompileBroker::mark_on_stack() { 948 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 949 // Since we are at a safepoint, we do not need a lock to access 950 // the compile queues. 951 if (_c2_compile_queue != NULL) { 952 _c2_compile_queue->mark_on_stack(); 953 } 954 if (_c1_compile_queue != NULL) { 955 _c1_compile_queue->mark_on_stack(); 956 } 957 } 958 959 // ------------------------------------------------------------------ 960 // CompileBroker::compile_method 961 // 962 // Request compilation of a method. 963 void CompileBroker::compile_method_base(const methodHandle& method, 964 int osr_bci, 965 int comp_level, 966 const methodHandle& hot_method, 967 int hot_count, 968 CompileTask::CompileReason compile_reason, 969 bool blocking, 970 Thread* thread) { 971 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 972 assert(method->method_holder()->is_instance_klass(), 973 "sanity check"); 974 assert(!method->method_holder()->is_not_initialized(), 975 "method holder must be initialized"); 976 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 977 978 if (CIPrintRequests) { 979 tty->print("request: "); 980 method->print_short_name(tty); 981 if (osr_bci != InvocationEntryBci) { 982 tty->print(" osr_bci: %d", osr_bci); 983 } 984 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 985 if (!hot_method.is_null()) { 986 tty->print(" hot: "); 987 if (hot_method() != method()) { 988 hot_method->print_short_name(tty); 989 } else { 990 tty->print("yes"); 991 } 992 } 993 tty->cr(); 994 } 995 996 // A request has been made for compilation. Before we do any 997 // real work, check to see if the method has been compiled 998 // in the meantime with a definitive result. 999 if (compilation_is_complete(method, osr_bci, comp_level)) { 1000 return; 1001 } 1002 1003 #ifndef PRODUCT 1004 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1005 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1006 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1007 return; 1008 } 1009 } 1010 #endif 1011 1012 // If this method is already in the compile queue, then 1013 // we do not block the current thread. 1014 if (compilation_is_in_queue(method)) { 1015 // We may want to decay our counter a bit here to prevent 1016 // multiple denied requests for compilation. This is an 1017 // open compilation policy issue. Note: The other possibility, 1018 // in the case that this is a blocking compile request, is to have 1019 // all subsequent blocking requesters wait for completion of 1020 // ongoing compiles. Note that in this case we'll need a protocol 1021 // for freeing the associated compile tasks. [Or we could have 1022 // a single static monitor on which all these waiters sleep.] 1023 return; 1024 } 1025 1026 if (TieredCompilation) { 1027 // Tiered policy requires MethodCounters to exist before adding a method to 1028 // the queue. Create if we don't have them yet. 1029 method->get_method_counters(thread); 1030 } 1031 1032 // Outputs from the following MutexLocker block: 1033 CompileTask* task = NULL; 1034 CompileQueue* queue = compile_queue(comp_level); 1035 1036 // Acquire our lock. 1037 { 1038 MutexLocker locker(MethodCompileQueue_lock, thread); 1039 1040 // Make sure the method has not slipped into the queues since 1041 // last we checked; note that those checks were "fast bail-outs". 1042 // Here we need to be more careful, see 14012000 below. 1043 if (compilation_is_in_queue(method)) { 1044 return; 1045 } 1046 1047 // We need to check again to see if the compilation has 1048 // completed. A previous compilation may have registered 1049 // some result. 1050 if (compilation_is_complete(method, osr_bci, comp_level)) { 1051 return; 1052 } 1053 1054 // We now know that this compilation is not pending, complete, 1055 // or prohibited. Assign a compile_id to this compilation 1056 // and check to see if it is in our [Start..Stop) range. 1057 int compile_id = assign_compile_id(method, osr_bci); 1058 if (compile_id == 0) { 1059 // The compilation falls outside the allowed range. 1060 return; 1061 } 1062 1063 #if INCLUDE_JVMCI 1064 if (UseJVMCICompiler) { 1065 if (blocking) { 1066 // Don't allow blocking compiles for requests triggered by JVMCI. 1067 if (thread->is_Compiler_thread()) { 1068 blocking = false; 1069 } 1070 1071 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1072 vframeStream vfst((JavaThread*) thread); 1073 for (; !vfst.at_end(); vfst.next()) { 1074 if (vfst.method()->is_static_initializer() || 1075 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1076 vfst.method()->name() == vmSymbols::loadClass_name())) { 1077 blocking = false; 1078 break; 1079 } 1080 } 1081 1082 // Don't allow blocking compilation requests to JVMCI 1083 // if JVMCI itself is not yet initialized 1084 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 1085 blocking = false; 1086 } 1087 1088 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1089 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1090 // such as the DestroyJavaVM thread. 1091 if (JVMCIRuntime::shutdown_called()) { 1092 blocking = false; 1093 } 1094 } 1095 } 1096 #endif // INCLUDE_JVMCI 1097 1098 // We will enter the compilation in the queue. 1099 // 14012000: Note that this sets the queued_for_compile bits in 1100 // the target method. We can now reason that a method cannot be 1101 // queued for compilation more than once, as follows: 1102 // Before a thread queues a task for compilation, it first acquires 1103 // the compile queue lock, then checks if the method's queued bits 1104 // are set or it has already been compiled. Thus there can not be two 1105 // instances of a compilation task for the same method on the 1106 // compilation queue. Consider now the case where the compilation 1107 // thread has already removed a task for that method from the queue 1108 // and is in the midst of compiling it. In this case, the 1109 // queued_for_compile bits must be set in the method (and these 1110 // will be visible to the current thread, since the bits were set 1111 // under protection of the compile queue lock, which we hold now. 1112 // When the compilation completes, the compiler thread first sets 1113 // the compilation result and then clears the queued_for_compile 1114 // bits. Neither of these actions are protected by a barrier (or done 1115 // under the protection of a lock), so the only guarantee we have 1116 // (on machines with TSO (Total Store Order)) is that these values 1117 // will update in that order. As a result, the only combinations of 1118 // these bits that the current thread will see are, in temporal order: 1119 // <RESULT, QUEUE> : 1120 // <0, 1> : in compile queue, but not yet compiled 1121 // <1, 1> : compiled but queue bit not cleared 1122 // <1, 0> : compiled and queue bit cleared 1123 // Because we first check the queue bits then check the result bits, 1124 // we are assured that we cannot introduce a duplicate task. 1125 // Note that if we did the tests in the reverse order (i.e. check 1126 // result then check queued bit), we could get the result bit before 1127 // the compilation completed, and the queue bit after the compilation 1128 // completed, and end up introducing a "duplicate" (redundant) task. 1129 // In that case, the compiler thread should first check if a method 1130 // has already been compiled before trying to compile it. 1131 // NOTE: in the event that there are multiple compiler threads and 1132 // there is de-optimization/recompilation, things will get hairy, 1133 // and in that case it's best to protect both the testing (here) of 1134 // these bits, and their updating (here and elsewhere) under a 1135 // common lock. 1136 task = create_compile_task(queue, 1137 compile_id, method, 1138 osr_bci, comp_level, 1139 hot_method, hot_count, compile_reason, 1140 blocking); 1141 } 1142 1143 if (blocking) { 1144 wait_for_completion(task); 1145 } 1146 } 1147 1148 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1149 int comp_level, 1150 const methodHandle& hot_method, int hot_count, 1151 CompileTask::CompileReason compile_reason, 1152 Thread* THREAD) { 1153 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1154 if (!_initialized || comp_level == CompLevel_none) { 1155 return NULL; 1156 } 1157 1158 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1159 assert(comp != NULL, "Ensure we have a compiler"); 1160 1161 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1162 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1163 DirectivesStack::release(directive); 1164 return nm; 1165 } 1166 1167 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1168 int comp_level, 1169 const methodHandle& hot_method, int hot_count, 1170 CompileTask::CompileReason compile_reason, 1171 DirectiveSet* directive, 1172 Thread* THREAD) { 1173 1174 // make sure arguments make sense 1175 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1176 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1177 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1178 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1179 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1180 // allow any levels for WhiteBox 1181 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1182 // return quickly if possible 1183 1184 // lock, make sure that the compilation 1185 // isn't prohibited in a straightforward way. 1186 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1187 if (comp == NULL || !comp->can_compile_method(method) || 1188 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1189 return NULL; 1190 } 1191 1192 #if INCLUDE_JVMCI 1193 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { 1194 return NULL; 1195 } 1196 #endif 1197 1198 if (osr_bci == InvocationEntryBci) { 1199 // standard compilation 1200 CompiledMethod* method_code = method->code(); 1201 if (method_code != NULL && method_code->is_nmethod()) { 1202 if (compilation_is_complete(method, osr_bci, comp_level)) { 1203 return (nmethod*) method_code; 1204 } 1205 } 1206 if (method->is_not_compilable(comp_level)) { 1207 return NULL; 1208 } 1209 } else { 1210 // osr compilation 1211 #ifndef TIERED 1212 // seems like an assert of dubious value 1213 assert(comp_level == CompLevel_highest_tier, 1214 "all OSR compiles are assumed to be at a single compilation level"); 1215 #endif // TIERED 1216 // We accept a higher level osr method 1217 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1218 if (nm != NULL) return nm; 1219 if (method->is_not_osr_compilable(comp_level)) return NULL; 1220 } 1221 1222 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1223 // some prerequisites that are compiler specific 1224 if (comp->is_c2()) { 1225 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1226 // Resolve all classes seen in the signature of the method 1227 // we are compiling. 1228 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1229 } 1230 1231 // If the method is native, do the lookup in the thread requesting 1232 // the compilation. Native lookups can load code, which is not 1233 // permitted during compilation. 1234 // 1235 // Note: A native method implies non-osr compilation which is 1236 // checked with an assertion at the entry of this method. 1237 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1238 bool in_base_library; 1239 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1240 if (HAS_PENDING_EXCEPTION) { 1241 // In case of an exception looking up the method, we just forget 1242 // about it. The interpreter will kick-in and throw the exception. 1243 method->set_not_compilable(); // implies is_not_osr_compilable() 1244 CLEAR_PENDING_EXCEPTION; 1245 return NULL; 1246 } 1247 assert(method->has_native_function(), "must have native code by now"); 1248 } 1249 1250 // RedefineClasses() has replaced this method; just return 1251 if (method->is_old()) { 1252 return NULL; 1253 } 1254 1255 // JVMTI -- post_compile_event requires jmethod_id() that may require 1256 // a lock the compiling thread can not acquire. Prefetch it here. 1257 if (JvmtiExport::should_post_compiled_method_load()) { 1258 method->jmethod_id(); 1259 } 1260 1261 // do the compilation 1262 if (method->is_native()) { 1263 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1264 // The following native methods: 1265 // 1266 // java.lang.Float.intBitsToFloat 1267 // java.lang.Float.floatToRawIntBits 1268 // java.lang.Double.longBitsToDouble 1269 // java.lang.Double.doubleToRawLongBits 1270 // 1271 // are called through the interpreter even if interpreter native stubs 1272 // are not preferred (i.e., calling through adapter handlers is preferred). 1273 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1274 // if the version of the methods from the native libraries is called. 1275 // As the interpreter and the C2-intrinsified version of the methods preserves 1276 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1277 if ((UseSSE >= 1 && 1278 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1279 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1280 (UseSSE >= 2 && 1281 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1282 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1283 return NULL; 1284 } 1285 1286 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1287 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1288 // 1289 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1290 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1291 AdapterHandlerLibrary::create_native_wrapper(method); 1292 } else { 1293 return NULL; 1294 } 1295 } else { 1296 // If the compiler is shut off due to code cache getting full 1297 // fail out now so blocking compiles dont hang the java thread 1298 if (!should_compile_new_jobs()) { 1299 CompilationPolicy::policy()->delay_compilation(method()); 1300 return NULL; 1301 } 1302 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; 1303 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1304 } 1305 1306 // return requested nmethod 1307 // We accept a higher level osr method 1308 if (osr_bci == InvocationEntryBci) { 1309 CompiledMethod* code = method->code(); 1310 if (code == NULL) { 1311 return (nmethod*) code; 1312 } else { 1313 return code->as_nmethod_or_null(); 1314 } 1315 } 1316 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1317 } 1318 1319 1320 // ------------------------------------------------------------------ 1321 // CompileBroker::compilation_is_complete 1322 // 1323 // See if compilation of this method is already complete. 1324 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1325 int osr_bci, 1326 int comp_level) { 1327 bool is_osr = (osr_bci != standard_entry_bci); 1328 if (is_osr) { 1329 if (method->is_not_osr_compilable(comp_level)) { 1330 return true; 1331 } else { 1332 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1333 return (result != NULL); 1334 } 1335 } else { 1336 if (method->is_not_compilable(comp_level)) { 1337 return true; 1338 } else { 1339 CompiledMethod* result = method->code(); 1340 if (result == NULL) return false; 1341 return comp_level == result->comp_level(); 1342 } 1343 } 1344 } 1345 1346 1347 /** 1348 * See if this compilation is already requested. 1349 * 1350 * Implementation note: there is only a single "is in queue" bit 1351 * for each method. This means that the check below is overly 1352 * conservative in the sense that an osr compilation in the queue 1353 * will block a normal compilation from entering the queue (and vice 1354 * versa). This can be remedied by a full queue search to disambiguate 1355 * cases. If it is deemed profitable, this may be done. 1356 */ 1357 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1358 return method->queued_for_compilation(); 1359 } 1360 1361 // ------------------------------------------------------------------ 1362 // CompileBroker::compilation_is_prohibited 1363 // 1364 // See if this compilation is not allowed. 1365 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1366 bool is_native = method->is_native(); 1367 // Some compilers may not support the compilation of natives. 1368 AbstractCompiler *comp = compiler(comp_level); 1369 if (is_native && 1370 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1371 method->set_not_compilable_quietly(comp_level); 1372 return true; 1373 } 1374 1375 bool is_osr = (osr_bci != standard_entry_bci); 1376 // Some compilers may not support on stack replacement. 1377 if (is_osr && 1378 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1379 method->set_not_osr_compilable(comp_level); 1380 return true; 1381 } 1382 1383 // The method may be explicitly excluded by the user. 1384 double scale; 1385 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1386 bool quietly = CompilerOracle::should_exclude_quietly(); 1387 if (PrintCompilation && !quietly) { 1388 // This does not happen quietly... 1389 ResourceMark rm; 1390 tty->print("### Excluding %s:%s", 1391 method->is_native() ? "generation of native wrapper" : "compile", 1392 (method->is_static() ? " static" : "")); 1393 method->print_short_name(tty); 1394 tty->cr(); 1395 } 1396 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1397 } 1398 1399 return false; 1400 } 1401 1402 /** 1403 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1404 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1405 * The function also allows to generate separate compilation IDs for OSR compilations. 1406 */ 1407 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1408 #ifdef ASSERT 1409 bool is_osr = (osr_bci != standard_entry_bci); 1410 int id; 1411 if (method->is_native()) { 1412 assert(!is_osr, "can't be osr"); 1413 // Adapters, native wrappers and method handle intrinsics 1414 // should be generated always. 1415 return Atomic::add(1, &_compilation_id); 1416 } else if (CICountOSR && is_osr) { 1417 id = Atomic::add(1, &_osr_compilation_id); 1418 if (CIStartOSR <= id && id < CIStopOSR) { 1419 return id; 1420 } 1421 } else { 1422 id = Atomic::add(1, &_compilation_id); 1423 if (CIStart <= id && id < CIStop) { 1424 return id; 1425 } 1426 } 1427 1428 // Method was not in the appropriate compilation range. 1429 method->set_not_compilable_quietly(); 1430 return 0; 1431 #else 1432 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1433 // only _compilation_id is incremented. 1434 return Atomic::add(1, &_compilation_id); 1435 #endif 1436 } 1437 1438 // ------------------------------------------------------------------ 1439 // CompileBroker::assign_compile_id_unlocked 1440 // 1441 // Public wrapper for assign_compile_id that acquires the needed locks 1442 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1443 MutexLocker locker(MethodCompileQueue_lock, thread); 1444 return assign_compile_id(method, osr_bci); 1445 } 1446 1447 // ------------------------------------------------------------------ 1448 // CompileBroker::preload_classes 1449 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1450 // Move this code over from c1_Compiler.cpp 1451 ShouldNotReachHere(); 1452 } 1453 1454 1455 // ------------------------------------------------------------------ 1456 // CompileBroker::create_compile_task 1457 // 1458 // Create a CompileTask object representing the current request for 1459 // compilation. Add this task to the queue. 1460 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1461 int compile_id, 1462 const methodHandle& method, 1463 int osr_bci, 1464 int comp_level, 1465 const methodHandle& hot_method, 1466 int hot_count, 1467 CompileTask::CompileReason compile_reason, 1468 bool blocking) { 1469 CompileTask* new_task = CompileTask::allocate(); 1470 new_task->initialize(compile_id, method, osr_bci, comp_level, 1471 hot_method, hot_count, compile_reason, 1472 blocking); 1473 queue->add(new_task); 1474 return new_task; 1475 } 1476 1477 #if INCLUDE_JVMCI 1478 // The number of milliseconds to wait before checking if 1479 // JVMCI compilation has made progress. 1480 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1481 1482 // The number of JVMCI compilation progress checks that must fail 1483 // before unblocking a thread waiting for a blocking compilation. 1484 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1485 1486 /** 1487 * Waits for a JVMCI compiler to complete a given task. This thread 1488 * waits until either the task completes or it sees no JVMCI compilation 1489 * progress for N consecutive milliseconds where N is 1490 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1491 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1492 * 1493 * @return true if this thread needs to free/recycle the task 1494 */ 1495 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1496 MutexLocker waiter(task->lock(), thread); 1497 int progress_wait_attempts = 0; 1498 int methods_compiled = jvmci->methods_compiled(); 1499 while (!task->is_complete() && !is_compilation_disabled_forever() && 1500 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1501 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1502 1503 bool progress; 1504 if (jvmci_compiler_thread != NULL) { 1505 // If the JVMCI compiler thread is not blocked, we deem it to be making progress. 1506 progress = jvmci_compiler_thread->thread_state() != _thread_blocked; 1507 } else { 1508 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1509 // that all JVMCI compiler threads are blocked on. We use the counter for 1510 // successful JVMCI compilations to determine whether JVMCI compilation 1511 // is still making progress through the JVMCI compiler queue. 1512 progress = jvmci->methods_compiled() != methods_compiled; 1513 } 1514 1515 if (!progress) { 1516 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1517 if (PrintCompilation) { 1518 task->print(tty, "wait for blocking compilation timed out"); 1519 } 1520 break; 1521 } 1522 } else { 1523 progress_wait_attempts = 0; 1524 if (jvmci_compiler_thread == NULL) { 1525 methods_compiled = jvmci->methods_compiled(); 1526 } 1527 } 1528 } 1529 task->clear_waiter(); 1530 return task->is_complete(); 1531 } 1532 #endif 1533 1534 /** 1535 * Wait for the compilation task to complete. 1536 */ 1537 void CompileBroker::wait_for_completion(CompileTask* task) { 1538 if (CIPrintCompileQueue) { 1539 ttyLocker ttyl; 1540 tty->print_cr("BLOCKING FOR COMPILE"); 1541 } 1542 1543 assert(task->is_blocking(), "can only wait on blocking task"); 1544 1545 JavaThread* thread = JavaThread::current(); 1546 thread->set_blocked_on_compilation(true); 1547 1548 methodHandle method(thread, task->method()); 1549 bool free_task; 1550 #if INCLUDE_JVMCI 1551 AbstractCompiler* comp = compiler(task->comp_level()); 1552 if (comp->is_jvmci()) { 1553 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1554 } else 1555 #endif 1556 { 1557 MutexLocker waiter(task->lock(), thread); 1558 free_task = true; 1559 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1560 task->lock()->wait(); 1561 } 1562 } 1563 1564 thread->set_blocked_on_compilation(false); 1565 if (free_task) { 1566 if (is_compilation_disabled_forever()) { 1567 CompileTask::free(task); 1568 return; 1569 } 1570 1571 // It is harmless to check this status without the lock, because 1572 // completion is a stable property (until the task object is recycled). 1573 assert(task->is_complete(), "Compilation should have completed"); 1574 assert(task->code_handle() == NULL, "must be reset"); 1575 1576 // By convention, the waiter is responsible for recycling a 1577 // blocking CompileTask. Since there is only one waiter ever 1578 // waiting on a CompileTask, we know that no one else will 1579 // be using this CompileTask; we can free it. 1580 CompileTask::free(task); 1581 } 1582 } 1583 1584 /** 1585 * Initialize compiler thread(s) + compiler object(s). The postcondition 1586 * of this function is that the compiler runtimes are initialized and that 1587 * compiler threads can start compiling. 1588 */ 1589 bool CompileBroker::init_compiler_runtime() { 1590 CompilerThread* thread = CompilerThread::current(); 1591 AbstractCompiler* comp = thread->compiler(); 1592 // Final sanity check - the compiler object must exist 1593 guarantee(comp != NULL, "Compiler object must exist"); 1594 1595 int system_dictionary_modification_counter; 1596 { 1597 MutexLocker locker(Compile_lock, thread); 1598 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1599 } 1600 1601 { 1602 // Must switch to native to allocate ci_env 1603 ThreadToNativeFromVM ttn(thread); 1604 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1605 // Cache Jvmti state 1606 ci_env.cache_jvmti_state(); 1607 // Cache DTrace flags 1608 ci_env.cache_dtrace_flags(); 1609 1610 // Switch back to VM state to do compiler initialization 1611 ThreadInVMfromNative tv(thread); 1612 ResetNoHandleMark rnhm; 1613 1614 // Perform per-thread and global initializations 1615 comp->initialize(); 1616 } 1617 1618 if (comp->is_failed()) { 1619 disable_compilation_forever(); 1620 // If compiler initialization failed, no compiler thread that is specific to a 1621 // particular compiler runtime will ever start to compile methods. 1622 shutdown_compiler_runtime(comp, thread); 1623 return false; 1624 } 1625 1626 // C1 specific check 1627 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1628 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1629 return false; 1630 } 1631 1632 return true; 1633 } 1634 1635 /** 1636 * If C1 and/or C2 initialization failed, we shut down all compilation. 1637 * We do this to keep things simple. This can be changed if it ever turns 1638 * out to be a problem. 1639 */ 1640 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1641 // Free buffer blob, if allocated 1642 if (thread->get_buffer_blob() != NULL) { 1643 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1644 CodeCache::free(thread->get_buffer_blob()); 1645 } 1646 1647 if (comp->should_perform_shutdown()) { 1648 // There are two reasons for shutting down the compiler 1649 // 1) compiler runtime initialization failed 1650 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1651 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1652 1653 // Only one thread per compiler runtime object enters here 1654 // Set state to shut down 1655 comp->set_shut_down(); 1656 1657 // Delete all queued compilation tasks to make compiler threads exit faster. 1658 if (_c1_compile_queue != NULL) { 1659 _c1_compile_queue->free_all(); 1660 } 1661 1662 if (_c2_compile_queue != NULL) { 1663 _c2_compile_queue->free_all(); 1664 } 1665 1666 // Set flags so that we continue execution with using interpreter only. 1667 UseCompiler = false; 1668 UseInterpreter = true; 1669 1670 // We could delete compiler runtimes also. However, there are references to 1671 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1672 // fail. This can be done later if necessary. 1673 } 1674 } 1675 1676 /** 1677 * Helper function to create new or reuse old CompileLog. 1678 */ 1679 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1680 if (!LogCompilation) return NULL; 1681 1682 AbstractCompiler *compiler = ct->compiler(); 1683 bool c1 = compiler->is_c1(); 1684 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1685 assert(compiler_objects != NULL, "must be initialized at this point"); 1686 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1687 assert(logs != NULL, "must be initialized at this point"); 1688 int count = c1 ? _c1_count : _c2_count; 1689 1690 // Find Compiler number by its threadObj. 1691 oop compiler_obj = ct->threadObj(); 1692 int compiler_number = 0; 1693 bool found = false; 1694 for (; compiler_number < count; compiler_number++) { 1695 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) { 1696 found = true; 1697 break; 1698 } 1699 } 1700 assert(found, "Compiler must exist at this point"); 1701 1702 // Determine pointer for this thread's log. 1703 CompileLog** log_ptr = &logs[compiler_number]; 1704 1705 // Return old one if it exists. 1706 CompileLog* log = *log_ptr; 1707 if (log != NULL) { 1708 ct->init_log(log); 1709 return log; 1710 } 1711 1712 // Create a new one and remember it. 1713 init_compiler_thread_log(); 1714 log = ct->log(); 1715 *log_ptr = log; 1716 return log; 1717 } 1718 1719 // ------------------------------------------------------------------ 1720 // CompileBroker::compiler_thread_loop 1721 // 1722 // The main loop run by a CompilerThread. 1723 void CompileBroker::compiler_thread_loop() { 1724 CompilerThread* thread = CompilerThread::current(); 1725 CompileQueue* queue = thread->queue(); 1726 // For the thread that initializes the ciObjectFactory 1727 // this resource mark holds all the shared objects 1728 ResourceMark rm; 1729 1730 // First thread to get here will initialize the compiler interface 1731 1732 { 1733 ASSERT_IN_VM; 1734 MutexLocker only_one (CompileThread_lock, thread); 1735 if (!ciObjectFactory::is_initialized()) { 1736 ciObjectFactory::initialize(); 1737 } 1738 } 1739 1740 // Open a log. 1741 CompileLog* log = get_log(thread); 1742 if (log != NULL) { 1743 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1744 thread->name(), 1745 os::current_thread_id(), 1746 os::current_process_id()); 1747 log->stamp(); 1748 log->end_elem(); 1749 } 1750 1751 // If compiler thread/runtime initialization fails, exit the compiler thread 1752 if (!init_compiler_runtime()) { 1753 return; 1754 } 1755 1756 thread->start_idle_timer(); 1757 1758 // Poll for new compilation tasks as long as the JVM runs. Compilation 1759 // should only be disabled if something went wrong while initializing the 1760 // compiler runtimes. This, in turn, should not happen. The only known case 1761 // when compiler runtime initialization fails is if there is not enough free 1762 // space in the code cache to generate the necessary stubs, etc. 1763 while (!is_compilation_disabled_forever()) { 1764 // We need this HandleMark to avoid leaking VM handles. 1765 HandleMark hm(thread); 1766 1767 CompileTask* task = queue->get(); 1768 if (task == NULL) { 1769 if (UseDynamicNumberOfCompilerThreads) { 1770 // Access compiler_count under lock to enforce consistency. 1771 MutexLocker only_one(CompileThread_lock); 1772 if (can_remove(thread, true)) { 1773 if (TraceCompilerThreads) { 1774 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1775 thread->name(), thread->idle_time_millis()); 1776 } 1777 return; // Stop this thread. 1778 } 1779 } 1780 continue; 1781 } 1782 1783 if (UseDynamicNumberOfCompilerThreads) { 1784 possibly_add_compiler_threads(); 1785 } 1786 1787 // Give compiler threads an extra quanta. They tend to be bursty and 1788 // this helps the compiler to finish up the job. 1789 if (CompilerThreadHintNoPreempt) { 1790 os::hint_no_preempt(); 1791 } 1792 1793 // Assign the task to the current thread. Mark this compilation 1794 // thread as active for the profiler. 1795 CompileTaskWrapper ctw(task); 1796 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1797 task->set_code_handle(&result_handle); 1798 methodHandle method(thread, task->method()); 1799 1800 // Never compile a method if breakpoints are present in it 1801 if (method()->number_of_breakpoints() == 0) { 1802 // Compile the method. 1803 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1804 invoke_compiler_on_method(task); 1805 thread->start_idle_timer(); 1806 } else { 1807 // After compilation is disabled, remove remaining methods from queue 1808 method->clear_queued_for_compilation(); 1809 task->set_failure_reason("compilation is disabled"); 1810 } 1811 } 1812 } 1813 1814 // Shut down compiler runtime 1815 shutdown_compiler_runtime(thread->compiler(), thread); 1816 } 1817 1818 // ------------------------------------------------------------------ 1819 // CompileBroker::init_compiler_thread_log 1820 // 1821 // Set up state required by +LogCompilation. 1822 void CompileBroker::init_compiler_thread_log() { 1823 CompilerThread* thread = CompilerThread::current(); 1824 char file_name[4*K]; 1825 FILE* fp = NULL; 1826 intx thread_id = os::current_thread_id(); 1827 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1828 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1829 if (dir == NULL) { 1830 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1831 thread_id, os::current_process_id()); 1832 } else { 1833 jio_snprintf(file_name, sizeof(file_name), 1834 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1835 os::file_separator(), thread_id, os::current_process_id()); 1836 } 1837 1838 fp = fopen(file_name, "wt"); 1839 if (fp != NULL) { 1840 if (LogCompilation && Verbose) { 1841 tty->print_cr("Opening compilation log %s", file_name); 1842 } 1843 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1844 if (log == NULL) { 1845 fclose(fp); 1846 return; 1847 } 1848 thread->init_log(log); 1849 1850 if (xtty != NULL) { 1851 ttyLocker ttyl; 1852 // Record any per thread log files 1853 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1854 } 1855 return; 1856 } 1857 } 1858 warning("Cannot open log file: %s", file_name); 1859 } 1860 1861 void CompileBroker::log_metaspace_failure() { 1862 const char* message = "some methods may not be compiled because metaspace " 1863 "is out of memory"; 1864 if (_compilation_log != NULL) { 1865 _compilation_log->log_metaspace_failure(message); 1866 } 1867 if (PrintCompilation) { 1868 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1869 } 1870 } 1871 1872 1873 // ------------------------------------------------------------------ 1874 // CompileBroker::set_should_block 1875 // 1876 // Set _should_block. 1877 // Call this from the VM, with Threads_lock held and a safepoint requested. 1878 void CompileBroker::set_should_block() { 1879 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1880 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1881 #ifndef PRODUCT 1882 if (PrintCompilation && (Verbose || WizardMode)) 1883 tty->print_cr("notifying compiler thread pool to block"); 1884 #endif 1885 _should_block = true; 1886 } 1887 1888 // ------------------------------------------------------------------ 1889 // CompileBroker::maybe_block 1890 // 1891 // Call this from the compiler at convenient points, to poll for _should_block. 1892 void CompileBroker::maybe_block() { 1893 if (_should_block) { 1894 #ifndef PRODUCT 1895 if (PrintCompilation && (Verbose || WizardMode)) 1896 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1897 #endif 1898 ThreadInVMfromNative tivfn(JavaThread::current()); 1899 } 1900 } 1901 1902 // wrapper for CodeCache::print_summary() 1903 static void codecache_print(bool detailed) 1904 { 1905 ResourceMark rm; 1906 stringStream s; 1907 // Dump code cache into a buffer before locking the tty, 1908 { 1909 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1910 CodeCache::print_summary(&s, detailed); 1911 } 1912 ttyLocker ttyl; 1913 tty->print("%s", s.as_string()); 1914 } 1915 1916 // wrapper for CodeCache::print_summary() using outputStream 1917 static void codecache_print(outputStream* out, bool detailed) { 1918 ResourceMark rm; 1919 stringStream s; 1920 1921 // Dump code cache into a buffer 1922 { 1923 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1924 CodeCache::print_summary(&s, detailed); 1925 } 1926 1927 char* remaining_log = s.as_string(); 1928 while (*remaining_log != '\0') { 1929 char* eol = strchr(remaining_log, '\n'); 1930 if (eol == NULL) { 1931 out->print_cr("%s", remaining_log); 1932 remaining_log = remaining_log + strlen(remaining_log); 1933 } else { 1934 *eol = '\0'; 1935 out->print_cr("%s", remaining_log); 1936 remaining_log = eol + 1; 1937 } 1938 } 1939 } 1940 1941 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env) { 1942 if (success) { 1943 task->mark_success(); 1944 if (ci_env != NULL) { 1945 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1946 } 1947 if (_compilation_log != NULL) { 1948 nmethod* code = task->code(); 1949 if (code != NULL) { 1950 _compilation_log->log_nmethod(thread, code); 1951 } 1952 } 1953 } 1954 // simulate crash during compilation 1955 assert(task->compile_id() != CICrashAt, "just as planned"); 1956 } 1957 1958 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 1959 assert(event != NULL, "invariant"); 1960 assert(event->should_commit(), "invariant"); 1961 event->set_method(task->method()); 1962 event->set_compileId(task->compile_id()); 1963 event->set_compileLevel(task->comp_level()); 1964 event->set_succeded(task->is_success()); 1965 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1966 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1967 event->set_inlinedBytes(task->num_inlined_bytecodes()); 1968 event->commit(); 1969 } 1970 1971 int DirectivesStack::_depth = 0; 1972 CompilerDirectives* DirectivesStack::_top = NULL; 1973 CompilerDirectives* DirectivesStack::_bottom = NULL; 1974 1975 // ------------------------------------------------------------------ 1976 // CompileBroker::invoke_compiler_on_method 1977 // 1978 // Compile a method. 1979 // 1980 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1981 task->print_ul(); 1982 if (PrintCompilation) { 1983 ResourceMark rm; 1984 task->print_tty(); 1985 } 1986 elapsedTimer time; 1987 1988 CompilerThread* thread = CompilerThread::current(); 1989 ResourceMark rm(thread); 1990 1991 if (LogEvents) { 1992 _compilation_log->log_compile(thread, task); 1993 } 1994 1995 // Common flags. 1996 uint compile_id = task->compile_id(); 1997 int osr_bci = task->osr_bci(); 1998 bool is_osr = (osr_bci != standard_entry_bci); 1999 bool should_log = (thread->log() != NULL); 2000 bool should_break = false; 2001 const int task_level = task->comp_level(); 2002 AbstractCompiler* comp = task->compiler(); 2003 2004 DirectiveSet* directive; 2005 { 2006 // create the handle inside it's own block so it can't 2007 // accidentally be referenced once the thread transitions to 2008 // native. The NoHandleMark before the transition should catch 2009 // any cases where this occurs in the future. 2010 methodHandle method(thread, task->method()); 2011 assert(!method->is_native(), "no longer compile natives"); 2012 2013 // Look up matching directives 2014 directive = DirectivesStack::getMatchingDirective(method, comp); 2015 2016 // Save information about this method in case of failure. 2017 set_last_compile(thread, method, is_osr, task_level); 2018 2019 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2020 } 2021 2022 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2023 if (should_log && !directive->LogOption) { 2024 should_log = false; 2025 } 2026 2027 // Allocate a new set of JNI handles. 2028 push_jni_handle_block(); 2029 Method* target_handle = task->method(); 2030 int compilable = ciEnv::MethodCompilable; 2031 const char* failure_reason = NULL; 2032 const char* retry_message = NULL; 2033 2034 int system_dictionary_modification_counter; 2035 { 2036 MutexLocker locker(Compile_lock, thread); 2037 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 2038 } 2039 2040 #if INCLUDE_JVMCI 2041 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2042 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2043 2044 TraceTime t1("compilation", &time); 2045 EventCompilation event; 2046 2047 // Skip redefined methods 2048 if (target_handle->is_old()) { 2049 failure_reason = "redefined method"; 2050 retry_message = "not retryable"; 2051 compilable = ciEnv::MethodCompilable_never; 2052 } else { 2053 JVMCIEnv env(task, system_dictionary_modification_counter); 2054 methodHandle method(thread, target_handle); 2055 jvmci->compile_method(method, osr_bci, &env); 2056 2057 failure_reason = env.failure_reason(); 2058 if (!env.retryable()) { 2059 retry_message = "not retryable"; 2060 compilable = ciEnv::MethodCompilable_not_at_tier; 2061 } 2062 } 2063 post_compile(thread, task, task->code() != NULL, NULL); 2064 if (event.should_commit()) { 2065 post_compilation_event(&event, task); 2066 } 2067 2068 } else 2069 #endif // INCLUDE_JVMCI 2070 { 2071 NoHandleMark nhm; 2072 ThreadToNativeFromVM ttn(thread); 2073 2074 ciEnv ci_env(task, system_dictionary_modification_counter); 2075 if (should_break) { 2076 ci_env.set_break_at_compile(true); 2077 } 2078 if (should_log) { 2079 ci_env.set_log(thread->log()); 2080 } 2081 assert(thread->env() == &ci_env, "set by ci_env"); 2082 // The thread-env() field is cleared in ~CompileTaskWrapper. 2083 2084 // Cache Jvmti state 2085 ci_env.cache_jvmti_state(); 2086 2087 // Cache DTrace flags 2088 ci_env.cache_dtrace_flags(); 2089 2090 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2091 2092 TraceTime t1("compilation", &time); 2093 EventCompilation event; 2094 2095 if (comp == NULL) { 2096 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2097 } else { 2098 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2099 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2100 while (WhiteBox::compilation_locked) { 2101 locker.wait(Mutex::_no_safepoint_check_flag); 2102 } 2103 } 2104 comp->compile_method(&ci_env, target, osr_bci, directive); 2105 } 2106 2107 if (!ci_env.failing() && task->code() == NULL) { 2108 //assert(false, "compiler should always document failure"); 2109 // The compiler elected, without comment, not to register a result. 2110 // Do not attempt further compilations of this method. 2111 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2112 } 2113 2114 // Copy this bit to the enclosing block: 2115 compilable = ci_env.compilable(); 2116 2117 if (ci_env.failing()) { 2118 failure_reason = ci_env.failure_reason(); 2119 retry_message = ci_env.retry_message(); 2120 ci_env.report_failure(failure_reason); 2121 } 2122 2123 post_compile(thread, task, !ci_env.failing(), &ci_env); 2124 if (event.should_commit()) { 2125 post_compilation_event(&event, task); 2126 } 2127 } 2128 // Remove the JNI handle block after the ciEnv destructor has run in 2129 // the previous block. 2130 pop_jni_handle_block(); 2131 2132 if (failure_reason != NULL) { 2133 task->set_failure_reason(failure_reason); 2134 if (_compilation_log != NULL) { 2135 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2136 } 2137 if (PrintCompilation) { 2138 FormatBufferResource msg = retry_message != NULL ? 2139 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2140 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2141 task->print(tty, msg); 2142 } 2143 } 2144 2145 methodHandle method(thread, task->method()); 2146 2147 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2148 2149 collect_statistics(thread, time, task); 2150 2151 nmethod* nm = task->code(); 2152 if (nm != NULL) { 2153 nm->maybe_print_nmethod(directive); 2154 } 2155 DirectivesStack::release(directive); 2156 2157 if (PrintCompilation && PrintCompilation2) { 2158 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2159 tty->print("%4d ", compile_id); // print compilation number 2160 tty->print("%s ", (is_osr ? "%" : " ")); 2161 if (task->code() != NULL) { 2162 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2163 } 2164 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2165 } 2166 2167 Log(compilation, codecache) log; 2168 if (log.is_debug()) { 2169 LogStream ls(log.debug()); 2170 codecache_print(&ls, /* detailed= */ false); 2171 } 2172 if (PrintCodeCacheOnCompilation) { 2173 codecache_print(/* detailed= */ false); 2174 } 2175 // Disable compilation, if required. 2176 switch (compilable) { 2177 case ciEnv::MethodCompilable_never: 2178 if (is_osr) 2179 method->set_not_osr_compilable_quietly(); 2180 else 2181 method->set_not_compilable_quietly(); 2182 break; 2183 case ciEnv::MethodCompilable_not_at_tier: 2184 if (is_osr) 2185 method->set_not_osr_compilable_quietly(task_level); 2186 else 2187 method->set_not_compilable_quietly(task_level); 2188 break; 2189 } 2190 2191 // Note that the queued_for_compilation bits are cleared without 2192 // protection of a mutex. [They were set by the requester thread, 2193 // when adding the task to the compile queue -- at which time the 2194 // compile queue lock was held. Subsequently, we acquired the compile 2195 // queue lock to get this task off the compile queue; thus (to belabour 2196 // the point somewhat) our clearing of the bits must be occurring 2197 // only after the setting of the bits. See also 14012000 above. 2198 method->clear_queued_for_compilation(); 2199 2200 #ifdef ASSERT 2201 if (CollectedHeap::fired_fake_oom()) { 2202 // The current compile received a fake OOM during compilation so 2203 // go ahead and exit the VM since the test apparently succeeded 2204 tty->print_cr("*** Shutting down VM after successful fake OOM"); 2205 vm_exit(0); 2206 } 2207 #endif 2208 } 2209 2210 /** 2211 * The CodeCache is full. Print warning and disable compilation. 2212 * Schedule code cache cleaning so compilation can continue later. 2213 * This function needs to be called only from CodeCache::allocate(), 2214 * since we currently handle a full code cache uniformly. 2215 */ 2216 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2217 UseInterpreter = true; 2218 if (UseCompiler || AlwaysCompileLoopMethods ) { 2219 if (xtty != NULL) { 2220 ResourceMark rm; 2221 stringStream s; 2222 // Dump code cache state into a buffer before locking the tty, 2223 // because log_state() will use locks causing lock conflicts. 2224 CodeCache::log_state(&s); 2225 // Lock to prevent tearing 2226 ttyLocker ttyl; 2227 xtty->begin_elem("code_cache_full"); 2228 xtty->print("%s", s.as_string()); 2229 xtty->stamp(); 2230 xtty->end_elem(); 2231 } 2232 2233 #ifndef PRODUCT 2234 if (CompileTheWorld || ExitOnFullCodeCache) { 2235 codecache_print(/* detailed= */ true); 2236 before_exit(JavaThread::current()); 2237 exit_globals(); // will delete tty 2238 vm_direct_exit(CompileTheWorld ? 0 : 1); 2239 } 2240 #endif 2241 if (UseCodeCacheFlushing) { 2242 // Since code cache is full, immediately stop new compiles 2243 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2244 NMethodSweeper::log_sweep("disable_compiler"); 2245 } 2246 } else { 2247 disable_compilation_forever(); 2248 } 2249 2250 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2251 } 2252 } 2253 2254 // ------------------------------------------------------------------ 2255 // CompileBroker::set_last_compile 2256 // 2257 // Record this compilation for debugging purposes. 2258 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2259 ResourceMark rm; 2260 char* method_name = method->name()->as_C_string(); 2261 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2262 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2263 char current_method[CompilerCounters::cmname_buffer_length]; 2264 size_t maxLen = CompilerCounters::cmname_buffer_length; 2265 2266 if (UsePerfData) { 2267 const char* class_name = method->method_holder()->name()->as_C_string(); 2268 2269 size_t s1len = strlen(class_name); 2270 size_t s2len = strlen(method_name); 2271 2272 // check if we need to truncate the string 2273 if (s1len + s2len + 2 > maxLen) { 2274 2275 // the strategy is to lop off the leading characters of the 2276 // class name and the trailing characters of the method name. 2277 2278 if (s2len + 2 > maxLen) { 2279 // lop of the entire class name string, let snprintf handle 2280 // truncation of the method name. 2281 class_name += s1len; // null string 2282 } 2283 else { 2284 // lop off the extra characters from the front of the class name 2285 class_name += ((s1len + s2len + 2) - maxLen); 2286 } 2287 } 2288 2289 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2290 } 2291 2292 if (CICountOSR && is_osr) { 2293 _last_compile_type = osr_compile; 2294 } else { 2295 _last_compile_type = normal_compile; 2296 } 2297 _last_compile_level = comp_level; 2298 2299 if (UsePerfData) { 2300 CompilerCounters* counters = thread->counters(); 2301 counters->set_current_method(current_method); 2302 counters->set_compile_type((jlong)_last_compile_type); 2303 } 2304 } 2305 2306 2307 // ------------------------------------------------------------------ 2308 // CompileBroker::push_jni_handle_block 2309 // 2310 // Push on a new block of JNI handles. 2311 void CompileBroker::push_jni_handle_block() { 2312 JavaThread* thread = JavaThread::current(); 2313 2314 // Allocate a new block for JNI handles. 2315 // Inlined code from jni_PushLocalFrame() 2316 JNIHandleBlock* java_handles = thread->active_handles(); 2317 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2318 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2319 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2320 thread->set_active_handles(compile_handles); 2321 } 2322 2323 2324 // ------------------------------------------------------------------ 2325 // CompileBroker::pop_jni_handle_block 2326 // 2327 // Pop off the current block of JNI handles. 2328 void CompileBroker::pop_jni_handle_block() { 2329 JavaThread* thread = JavaThread::current(); 2330 2331 // Release our JNI handle block 2332 JNIHandleBlock* compile_handles = thread->active_handles(); 2333 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2334 thread->set_active_handles(java_handles); 2335 compile_handles->set_pop_frame_link(NULL); 2336 JNIHandleBlock::release_block(compile_handles, thread); // may block 2337 } 2338 2339 // ------------------------------------------------------------------ 2340 // CompileBroker::collect_statistics 2341 // 2342 // Collect statistics about the compilation. 2343 2344 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2345 bool success = task->is_success(); 2346 methodHandle method (thread, task->method()); 2347 uint compile_id = task->compile_id(); 2348 bool is_osr = (task->osr_bci() != standard_entry_bci); 2349 nmethod* code = task->code(); 2350 CompilerCounters* counters = thread->counters(); 2351 2352 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2353 MutexLocker locker(CompileStatistics_lock); 2354 2355 // _perf variables are production performance counters which are 2356 // updated regardless of the setting of the CITime and CITimeEach flags 2357 // 2358 2359 // account all time, including bailouts and failures in this counter; 2360 // C1 and C2 counters are counting both successful and unsuccessful compiles 2361 _t_total_compilation.add(time); 2362 2363 if (!success) { 2364 _total_bailout_count++; 2365 if (UsePerfData) { 2366 _perf_last_failed_method->set_value(counters->current_method()); 2367 _perf_last_failed_type->set_value(counters->compile_type()); 2368 _perf_total_bailout_count->inc(); 2369 } 2370 _t_bailedout_compilation.add(time); 2371 } else if (code == NULL) { 2372 if (UsePerfData) { 2373 _perf_last_invalidated_method->set_value(counters->current_method()); 2374 _perf_last_invalidated_type->set_value(counters->compile_type()); 2375 _perf_total_invalidated_count->inc(); 2376 } 2377 _total_invalidated_count++; 2378 _t_invalidated_compilation.add(time); 2379 } else { 2380 // Compilation succeeded 2381 2382 // update compilation ticks - used by the implementation of 2383 // java.lang.management.CompilationMBean 2384 _perf_total_compilation->inc(time.ticks()); 2385 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2386 2387 if (CITime) { 2388 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2389 if (is_osr) { 2390 _t_osr_compilation.add(time); 2391 _sum_osr_bytes_compiled += bytes_compiled; 2392 } else { 2393 _t_standard_compilation.add(time); 2394 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2395 } 2396 2397 #if INCLUDE_JVMCI 2398 AbstractCompiler* comp = compiler(task->comp_level()); 2399 if (comp) { 2400 CompilerStatistics* stats = comp->stats(); 2401 if (stats) { 2402 if (is_osr) { 2403 stats->_osr.update(time, bytes_compiled); 2404 } else { 2405 stats->_standard.update(time, bytes_compiled); 2406 } 2407 stats->_nmethods_size += code->total_size(); 2408 stats->_nmethods_code_size += code->insts_size(); 2409 } else { // if (!stats) 2410 assert(false, "Compiler statistics object must exist"); 2411 } 2412 } else { // if (!comp) 2413 assert(false, "Compiler object must exist"); 2414 } 2415 #endif // INCLUDE_JVMCI 2416 } 2417 2418 if (UsePerfData) { 2419 // save the name of the last method compiled 2420 _perf_last_method->set_value(counters->current_method()); 2421 _perf_last_compile_type->set_value(counters->compile_type()); 2422 _perf_last_compile_size->set_value(method->code_size() + 2423 task->num_inlined_bytecodes()); 2424 if (is_osr) { 2425 _perf_osr_compilation->inc(time.ticks()); 2426 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2427 } else { 2428 _perf_standard_compilation->inc(time.ticks()); 2429 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2430 } 2431 } 2432 2433 if (CITimeEach) { 2434 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2435 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2436 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2437 } 2438 2439 // Collect counts of successful compilations 2440 _sum_nmethod_size += code->total_size(); 2441 _sum_nmethod_code_size += code->insts_size(); 2442 _total_compile_count++; 2443 2444 if (UsePerfData) { 2445 _perf_sum_nmethod_size->inc( code->total_size()); 2446 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2447 _perf_total_compile_count->inc(); 2448 } 2449 2450 if (is_osr) { 2451 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2452 _total_osr_compile_count++; 2453 } else { 2454 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2455 _total_standard_compile_count++; 2456 } 2457 } 2458 // set the current method for the thread to null 2459 if (UsePerfData) counters->set_current_method(""); 2460 } 2461 2462 const char* CompileBroker::compiler_name(int comp_level) { 2463 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2464 if (comp == NULL) { 2465 return "no compiler"; 2466 } else { 2467 return (comp->name()); 2468 } 2469 } 2470 2471 #if INCLUDE_JVMCI 2472 void CompileBroker::print_times(AbstractCompiler* comp) { 2473 CompilerStatistics* stats = comp->stats(); 2474 if (stats) { 2475 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}", 2476 comp->name(), stats->bytes_per_second(), 2477 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2478 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2479 stats->_nmethods_size, stats->_nmethods_code_size); 2480 } else { // if (!stats) 2481 assert(false, "Compiler statistics object must exist"); 2482 } 2483 comp->print_timers(); 2484 } 2485 #endif // INCLUDE_JVMCI 2486 2487 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2488 #if INCLUDE_JVMCI 2489 elapsedTimer standard_compilation; 2490 elapsedTimer total_compilation; 2491 elapsedTimer osr_compilation; 2492 2493 int standard_bytes_compiled = 0; 2494 int osr_bytes_compiled = 0; 2495 2496 int standard_compile_count = 0; 2497 int osr_compile_count = 0; 2498 int total_compile_count = 0; 2499 2500 int nmethods_size = 0; 2501 int nmethods_code_size = 0; 2502 bool printedHeader = false; 2503 2504 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2505 AbstractCompiler* comp = _compilers[i]; 2506 if (comp != NULL) { 2507 if (per_compiler && aggregate && !printedHeader) { 2508 printedHeader = true; 2509 tty->cr(); 2510 tty->print_cr("Individual compiler times (for compiled methods only)"); 2511 tty->print_cr("------------------------------------------------"); 2512 tty->cr(); 2513 } 2514 CompilerStatistics* stats = comp->stats(); 2515 2516 if (stats) { 2517 standard_compilation.add(stats->_standard._time); 2518 osr_compilation.add(stats->_osr._time); 2519 2520 standard_bytes_compiled += stats->_standard._bytes; 2521 osr_bytes_compiled += stats->_osr._bytes; 2522 2523 standard_compile_count += stats->_standard._count; 2524 osr_compile_count += stats->_osr._count; 2525 2526 nmethods_size += stats->_nmethods_size; 2527 nmethods_code_size += stats->_nmethods_code_size; 2528 } else { // if (!stats) 2529 assert(false, "Compiler statistics object must exist"); 2530 } 2531 2532 if (per_compiler) { 2533 print_times(comp); 2534 } 2535 } 2536 } 2537 total_compile_count = osr_compile_count + standard_compile_count; 2538 total_compilation.add(osr_compilation); 2539 total_compilation.add(standard_compilation); 2540 2541 // In hosted mode, print the JVMCI compiler specific counters manually. 2542 if (!UseJVMCICompiler) { 2543 JVMCICompiler::print_compilation_timers(); 2544 } 2545 #else // INCLUDE_JVMCI 2546 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2547 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2548 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2549 2550 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2551 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2552 2553 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2554 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2555 int total_compile_count = CompileBroker::_total_compile_count; 2556 2557 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2558 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2559 #endif // INCLUDE_JVMCI 2560 2561 if (!aggregate) { 2562 return; 2563 } 2564 tty->cr(); 2565 tty->print_cr("Accumulated compiler times"); 2566 tty->print_cr("----------------------------------------------------------"); 2567 //0000000000111111111122222222223333333333444444444455555555556666666666 2568 //0123456789012345678901234567890123456789012345678901234567890123456789 2569 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2570 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2571 standard_compilation.seconds(), 2572 standard_compilation.seconds() / standard_compile_count); 2573 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2574 CompileBroker::_t_bailedout_compilation.seconds(), 2575 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2576 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2577 osr_compilation.seconds(), 2578 osr_compilation.seconds() / osr_compile_count); 2579 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2580 CompileBroker::_t_invalidated_compilation.seconds(), 2581 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2582 2583 AbstractCompiler *comp = compiler(CompLevel_simple); 2584 if (comp != NULL) { 2585 tty->cr(); 2586 comp->print_timers(); 2587 } 2588 comp = compiler(CompLevel_full_optimization); 2589 if (comp != NULL) { 2590 tty->cr(); 2591 comp->print_timers(); 2592 } 2593 tty->cr(); 2594 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2595 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2596 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2597 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2598 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2599 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2600 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2601 double tcs = total_compilation.seconds(); 2602 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2603 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2604 tty->cr(); 2605 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2606 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2607 } 2608 2609 // Debugging output for failure 2610 void CompileBroker::print_last_compile() { 2611 if (_last_compile_level != CompLevel_none && 2612 compiler(_last_compile_level) != NULL && 2613 _last_compile_type != no_compile) { 2614 if (_last_compile_type == osr_compile) { 2615 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2616 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2617 } else { 2618 tty->print_cr("Last parse: %d+++(%d) %s", 2619 _compilation_id, _last_compile_level, _last_method_compiled); 2620 } 2621 } 2622 } 2623 2624 // Print general/accumulated JIT information. 2625 void CompileBroker::print_info(outputStream *out) { 2626 if (out == NULL) out = tty; 2627 out->cr(); 2628 out->print_cr("======================"); 2629 out->print_cr(" General JIT info "); 2630 out->print_cr("======================"); 2631 out->cr(); 2632 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2633 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2634 out->cr(); 2635 out->print_cr("CodeCache overview"); 2636 out->print_cr("--------------------------------------------------------"); 2637 out->cr(); 2638 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2639 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2640 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2641 out->cr(); 2642 2643 out->cr(); 2644 out->print_cr("CodeCache cleaning overview"); 2645 out->print_cr("--------------------------------------------------------"); 2646 out->cr(); 2647 NMethodSweeper::print(out); 2648 out->print_cr("--------------------------------------------------------"); 2649 out->cr(); 2650 } 2651 2652 // Note: tty_lock must not be held upon entry to this function. 2653 // Print functions called from herein do "micro-locking" on tty_lock. 2654 // That's a tradeoff which keeps together important blocks of output. 2655 // At the same time, continuous tty_lock hold time is kept in check, 2656 // preventing concurrently printing threads from stalling a long time. 2657 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) { 2658 TimeStamp ts_total; 2659 TimeStamp ts; 2660 2661 bool allFun = !strcmp(function, "all"); 2662 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2663 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2664 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2665 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2666 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2667 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2668 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2669 bool discard = !strcmp(function, "discard") || allFun; 2670 2671 if (out == NULL) { 2672 out = tty; 2673 } 2674 2675 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2676 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2677 out->cr(); 2678 return; 2679 } 2680 2681 ts_total.update(); // record starting point 2682 2683 if (aggregate) { 2684 print_info(out); 2685 } 2686 2687 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2688 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function. 2689 // When we request individual parts of the analysis via the jcmd interface, it is possible 2690 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2691 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2692 // across user interaction. 2693 ts.update(); // record starting point 2694 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2695 out->cr(); 2696 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds()); 2697 out->cr(); 2698 2699 if (aggregate) { 2700 // It is sufficient to hold the CodeCache_lock only for the aggregate step. 2701 // All other functions operate on aggregated data - except MethodNames, but that should be safe. 2702 // The separate CodeHeapStateAnalytics_lock protects the printing functions against 2703 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock. 2704 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2705 // leading to an unnecessarily long hold time of the CodeCache_lock. 2706 ts.update(); // record starting point 2707 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag); 2708 out->cr(); 2709 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds()); 2710 out->cr(); 2711 2712 ts.update(); // record starting point 2713 CodeCache::aggregate(out, granularity); 2714 out->cr(); 2715 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds()); 2716 out->cr(); 2717 } 2718 2719 if (usedSpace) CodeCache::print_usedSpace(out); 2720 if (freeSpace) CodeCache::print_freeSpace(out); 2721 if (methodCount) CodeCache::print_count(out); 2722 if (methodSpace) CodeCache::print_space(out); 2723 if (methodAge) CodeCache::print_age(out); 2724 if (methodNames) CodeCache::print_names(out); 2725 if (discard) CodeCache::discard(out); 2726 2727 out->cr(); 2728 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds()); 2729 out->cr(); 2730 }