1 /* 2 * Copyright (c) 1999, 2019, 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/handles.inline.hpp" 52 #include "runtime/init.hpp" 53 #include "runtime/interfaceSupport.inline.hpp" 54 #include "runtime/javaCalls.hpp" 55 #include "runtime/jniHandles.inline.hpp" 56 #include "runtime/os.hpp" 57 #include "runtime/safepointVerifiers.hpp" 58 #include "runtime/sharedRuntime.hpp" 59 #include "runtime/sweeper.hpp" 60 #include "runtime/timerTrace.hpp" 61 #include "runtime/vframe.inline.hpp" 62 #include "utilities/debug.hpp" 63 #include "utilities/dtrace.hpp" 64 #include "utilities/events.hpp" 65 #include "utilities/formatBuffer.hpp" 66 #include "utilities/macros.hpp" 67 #ifdef COMPILER1 68 #include "c1/c1_Compiler.hpp" 69 #endif 70 #if INCLUDE_JVMCI 71 #include "jvmci/jvmciCompiler.hpp" 72 #include "jvmci/jvmciRuntime.hpp" 73 #include "jvmci/jvmciJavaClasses.hpp" 74 #include "runtime/vframe.hpp" 75 #endif 76 #ifdef COMPILER2 77 #include "opto/c2compiler.hpp" 78 #endif 79 80 #ifdef DTRACE_ENABLED 81 82 // Only bother with this argument setup if dtrace is available 83 84 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 85 { \ 86 Symbol* klass_name = (method)->klass_name(); \ 87 Symbol* name = (method)->name(); \ 88 Symbol* signature = (method)->signature(); \ 89 HOTSPOT_METHOD_COMPILE_BEGIN( \ 90 (char *) comp_name, strlen(comp_name), \ 91 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 92 (char *) name->bytes(), name->utf8_length(), \ 93 (char *) signature->bytes(), signature->utf8_length()); \ 94 } 95 96 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 97 { \ 98 Symbol* klass_name = (method)->klass_name(); \ 99 Symbol* name = (method)->name(); \ 100 Symbol* signature = (method)->signature(); \ 101 HOTSPOT_METHOD_COMPILE_END( \ 102 (char *) comp_name, strlen(comp_name), \ 103 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 104 (char *) name->bytes(), name->utf8_length(), \ 105 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 106 } 107 108 #else // ndef DTRACE_ENABLED 109 110 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 111 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 112 113 #endif // ndef DTRACE_ENABLED 114 115 bool CompileBroker::_initialized = false; 116 volatile bool CompileBroker::_should_block = false; 117 volatile int CompileBroker::_print_compilation_warning = 0; 118 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 119 120 // The installed compiler(s) 121 AbstractCompiler* CompileBroker::_compilers[2]; 122 123 // The maximum numbers of compiler threads to be determined during startup. 124 int CompileBroker::_c1_count = 0; 125 int CompileBroker::_c2_count = 0; 126 127 // An array of compiler names as Java String objects 128 jobject* CompileBroker::_compiler1_objects = NULL; 129 jobject* CompileBroker::_compiler2_objects = NULL; 130 131 CompileLog** CompileBroker::_compiler1_logs = NULL; 132 CompileLog** CompileBroker::_compiler2_logs = NULL; 133 134 // These counters are used to assign an unique ID to each compilation. 135 volatile jint CompileBroker::_compilation_id = 0; 136 volatile jint CompileBroker::_osr_compilation_id = 0; 137 138 // Debugging information 139 int CompileBroker::_last_compile_type = no_compile; 140 int CompileBroker::_last_compile_level = CompLevel_none; 141 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 142 143 // Performance counters 144 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 145 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 146 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 147 148 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 149 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 150 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 152 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 153 154 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 155 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 156 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 157 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 158 159 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 160 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 161 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 162 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 163 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 164 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 165 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 166 167 // Timers and counters for generating statistics 168 elapsedTimer CompileBroker::_t_total_compilation; 169 elapsedTimer CompileBroker::_t_osr_compilation; 170 elapsedTimer CompileBroker::_t_standard_compilation; 171 elapsedTimer CompileBroker::_t_invalidated_compilation; 172 elapsedTimer CompileBroker::_t_bailedout_compilation; 173 174 int CompileBroker::_total_bailout_count = 0; 175 int CompileBroker::_total_invalidated_count = 0; 176 int CompileBroker::_total_compile_count = 0; 177 int CompileBroker::_total_osr_compile_count = 0; 178 int CompileBroker::_total_standard_compile_count = 0; 179 int CompileBroker::_total_compiler_stopped_count = 0; 180 int CompileBroker::_total_compiler_restarted_count = 0; 181 182 int CompileBroker::_sum_osr_bytes_compiled = 0; 183 int CompileBroker::_sum_standard_bytes_compiled = 0; 184 int CompileBroker::_sum_nmethod_size = 0; 185 int CompileBroker::_sum_nmethod_code_size = 0; 186 187 long CompileBroker::_peak_compilation_time = 0; 188 189 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 190 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 191 192 193 194 class CompilationLog : public StringEventLog { 195 public: 196 CompilationLog() : StringEventLog("Compilation events") { 197 } 198 199 void log_compile(JavaThread* thread, CompileTask* task) { 200 StringLogMessage lm; 201 stringStream sstr = lm.stream(); 202 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 203 task->print(&sstr, NULL, true, false); 204 log(thread, "%s", (const char*)lm); 205 } 206 207 void log_nmethod(JavaThread* thread, nmethod* nm) { 208 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 209 nm->compile_id(), nm->is_osr_method() ? "%" : "", 210 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 211 } 212 213 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 214 StringLogMessage lm; 215 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 216 if (retry_message != NULL) { 217 lm.append(" (%s)", retry_message); 218 } 219 lm.print("\n"); 220 log(thread, "%s", (const char*)lm); 221 } 222 223 void log_metaspace_failure(const char* reason) { 224 ResourceMark rm; 225 StringLogMessage lm; 226 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 227 lm.print("\n"); 228 log(JavaThread::current(), "%s", (const char*)lm); 229 } 230 }; 231 232 static CompilationLog* _compilation_log = NULL; 233 234 bool compileBroker_init() { 235 if (LogEvents) { 236 _compilation_log = new CompilationLog(); 237 } 238 239 // init directives stack, adding default directive 240 DirectivesStack::init(); 241 242 if (DirectivesParser::has_file()) { 243 return DirectivesParser::parse_from_flag(); 244 } else if (CompilerDirectivesPrint) { 245 // Print default directive even when no other was added 246 DirectivesStack::print(tty); 247 } 248 249 return true; 250 } 251 252 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 253 CompilerThread* thread = CompilerThread::current(); 254 thread->set_task(task); 255 #if INCLUDE_JVMCI 256 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 257 task->set_jvmci_compiler_thread(thread); 258 } 259 #endif 260 CompileLog* log = thread->log(); 261 if (log != NULL) task->log_task_start(log); 262 } 263 264 CompileTaskWrapper::~CompileTaskWrapper() { 265 CompilerThread* thread = CompilerThread::current(); 266 CompileTask* task = thread->task(); 267 CompileLog* log = thread->log(); 268 if (log != NULL) task->log_task_done(log); 269 thread->set_task(NULL); 270 task->set_code_handle(NULL); 271 thread->set_env(NULL); 272 if (task->is_blocking()) { 273 bool free_task = false; 274 { 275 MutexLocker notifier(task->lock(), thread); 276 task->mark_complete(); 277 #if INCLUDE_JVMCI 278 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 279 if (!task->has_waiter()) { 280 // The waiting thread timed out and thus did not free the task. 281 free_task = true; 282 } 283 task->set_jvmci_compiler_thread(NULL); 284 } 285 #endif 286 if (!free_task) { 287 // Notify the waiting thread that the compilation has completed 288 // so that it can free the task. 289 task->lock()->notify_all(); 290 } 291 } 292 if (free_task) { 293 // The task can only be freed once the task lock is released. 294 CompileTask::free(task); 295 } 296 } else { 297 task->mark_complete(); 298 299 // By convention, the compiling thread is responsible for 300 // recycling a non-blocking CompileTask. 301 CompileTask::free(task); 302 } 303 } 304 305 /** 306 * Check if a CompilerThread can be removed and update count if requested. 307 */ 308 static bool can_remove(CompilerThread *ct, bool do_it) { 309 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 310 if (!ReduceNumberOfCompilerThreads) return false; 311 312 AbstractCompiler *compiler = ct->compiler(); 313 int compiler_count = compiler->num_compiler_threads(); 314 bool c1 = compiler->is_c1(); 315 316 // Keep at least 1 compiler thread of each type. 317 if (compiler_count < 2) return false; 318 319 // Keep thread alive for at least some time. 320 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 321 322 // We only allow the last compiler thread of each type to get removed. 323 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1) 324 : CompileBroker::compiler2_object(compiler_count - 1); 325 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) { 326 if (do_it) { 327 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 328 compiler->set_num_compiler_threads(compiler_count - 1); 329 } 330 return true; 331 } 332 return false; 333 } 334 335 /** 336 * Add a CompileTask to a CompileQueue. 337 */ 338 void CompileQueue::add(CompileTask* task) { 339 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 340 341 task->set_next(NULL); 342 task->set_prev(NULL); 343 344 if (_last == NULL) { 345 // The compile queue is empty. 346 assert(_first == NULL, "queue is empty"); 347 _first = task; 348 _last = task; 349 } else { 350 // Append the task to the queue. 351 assert(_last->next() == NULL, "not last"); 352 _last->set_next(task); 353 task->set_prev(_last); 354 _last = task; 355 } 356 ++_size; 357 358 // Mark the method as being in the compile queue. 359 task->method()->set_queued_for_compilation(); 360 361 if (CIPrintCompileQueue) { 362 print_tty(); 363 } 364 365 if (LogCompilation && xtty != NULL) { 366 task->log_task_queued(); 367 } 368 369 // Notify CompilerThreads that a task is available. 370 MethodCompileQueue_lock->notify_all(); 371 } 372 373 /** 374 * Empties compilation queue by putting all compilation tasks onto 375 * a freelist. Furthermore, the method wakes up all threads that are 376 * waiting on a compilation task to finish. This can happen if background 377 * compilation is disabled. 378 */ 379 void CompileQueue::free_all() { 380 MutexLocker mu(MethodCompileQueue_lock); 381 CompileTask* next = _first; 382 383 // Iterate over all tasks in the compile queue 384 while (next != NULL) { 385 CompileTask* current = next; 386 next = current->next(); 387 { 388 // Wake up thread that blocks on the compile task. 389 MutexLocker ct_lock(current->lock()); 390 current->lock()->notify(); 391 } 392 // Put the task back on the freelist. 393 CompileTask::free(current); 394 } 395 _first = NULL; 396 397 // Wake up all threads that block on the queue. 398 MethodCompileQueue_lock->notify_all(); 399 } 400 401 /** 402 * Get the next CompileTask from a CompileQueue 403 */ 404 CompileTask* CompileQueue::get() { 405 // save methods from RedefineClasses across safepoint 406 // across MethodCompileQueue_lock below. 407 methodHandle save_method; 408 methodHandle save_hot_method; 409 410 MutexLocker locker(MethodCompileQueue_lock); 411 // If _first is NULL we have no more compile jobs. There are two reasons for 412 // having no compile jobs: First, we compiled everything we wanted. Second, 413 // we ran out of code cache so compilation has been disabled. In the latter 414 // case we perform code cache sweeps to free memory such that we can re-enable 415 // compilation. 416 while (_first == NULL) { 417 // Exit loop if compilation is disabled forever 418 if (CompileBroker::is_compilation_disabled_forever()) { 419 return NULL; 420 } 421 422 // If there are no compilation tasks and we can compile new jobs 423 // (i.e., there is enough free space in the code cache) there is 424 // no need to invoke the sweeper. As a result, the hotness of methods 425 // remains unchanged. This behavior is desired, since we want to keep 426 // the stable state, i.e., we do not want to evict methods from the 427 // code cache if it is unnecessary. 428 // We need a timed wait here, since compiler threads can exit if compilation 429 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 430 // is not critical and we do not want idle compiler threads to wake up too often. 431 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 432 433 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 434 // Still nothing to compile. Give caller a chance to stop this thread. 435 if (can_remove(CompilerThread::current(), false)) return NULL; 436 } 437 } 438 439 if (CompileBroker::is_compilation_disabled_forever()) { 440 return NULL; 441 } 442 443 CompileTask* task; 444 { 445 NoSafepointVerifier nsv; 446 task = CompilationPolicy::policy()->select_task(this); 447 } 448 449 if (task != NULL) { 450 // Save method pointers across unlock safepoint. The task is removed from 451 // the compilation queue, which is walked during RedefineClasses. 452 save_method = methodHandle(task->method()); 453 save_hot_method = methodHandle(task->hot_method()); 454 455 remove(task); 456 purge_stale_tasks(); // may temporarily release MCQ lock 457 } 458 459 return task; 460 } 461 462 // Clean & deallocate stale compile tasks. 463 // Temporarily releases MethodCompileQueue lock. 464 void CompileQueue::purge_stale_tasks() { 465 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 466 if (_first_stale != NULL) { 467 // Stale tasks are purged when MCQ lock is released, 468 // but _first_stale updates are protected by MCQ lock. 469 // Once task processing starts and MCQ lock is released, 470 // other compiler threads can reuse _first_stale. 471 CompileTask* head = _first_stale; 472 _first_stale = NULL; 473 { 474 MutexUnlocker ul(MethodCompileQueue_lock); 475 for (CompileTask* task = head; task != NULL; ) { 476 CompileTask* next_task = task->next(); 477 CompileTaskWrapper ctw(task); // Frees the task 478 task->set_failure_reason("stale task"); 479 task = next_task; 480 } 481 } 482 } 483 } 484 485 void CompileQueue::remove(CompileTask* task) { 486 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 487 if (task->prev() != NULL) { 488 task->prev()->set_next(task->next()); 489 } else { 490 // max is the first element 491 assert(task == _first, "Sanity"); 492 _first = task->next(); 493 } 494 495 if (task->next() != NULL) { 496 task->next()->set_prev(task->prev()); 497 } else { 498 // max is the last element 499 assert(task == _last, "Sanity"); 500 _last = task->prev(); 501 } 502 --_size; 503 } 504 505 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 506 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 507 remove(task); 508 509 // Enqueue the task for reclamation (should be done outside MCQ lock) 510 task->set_next(_first_stale); 511 task->set_prev(NULL); 512 _first_stale = task; 513 } 514 515 // methods in the compile queue need to be marked as used on the stack 516 // so that they don't get reclaimed by Redefine Classes 517 void CompileQueue::mark_on_stack() { 518 CompileTask* task = _first; 519 while (task != NULL) { 520 task->mark_on_stack(); 521 task = task->next(); 522 } 523 } 524 525 526 CompileQueue* CompileBroker::compile_queue(int comp_level) { 527 if (is_c2_compile(comp_level)) return _c2_compile_queue; 528 if (is_c1_compile(comp_level)) return _c1_compile_queue; 529 return NULL; 530 } 531 532 void CompileBroker::print_compile_queues(outputStream* st) { 533 st->print_cr("Current compiles: "); 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_locked_or_safepoint(MethodCompileQueue_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, AbstractCompiler* comp, TRAPS) { 745 JavaThread* thread = NULL; 746 { 747 MutexLocker mu(Threads_lock, THREAD); 748 if (comp != NULL) { 749 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { 750 CompilerCounters* counters = new CompilerCounters(); 751 thread = new CompilerThread(queue, counters); 752 } 753 } else { 754 thread = new CodeCacheSweeperThread(); 755 } 756 // At this point the new CompilerThread data-races with this startup 757 // thread (which I believe is the primoridal thread and NOT the VM 758 // thread). This means Java bytecodes being executed at startup can 759 // queue compile jobs which will run at whatever default priority the 760 // newly created CompilerThread runs at. 761 762 763 // At this point it may be possible that no osthread was created for the 764 // JavaThread due to lack of memory. We would have to throw an exception 765 // in that case. However, since this must work and we do not allow 766 // exceptions anyway, check and abort if this fails. But first release the 767 // lock. 768 769 if (thread != NULL && thread->osthread() != NULL) { 770 771 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread); 772 773 // Note that this only sets the JavaThread _priority field, which by 774 // definition is limited to Java priorities and not OS priorities. 775 // The os-priority is set in the CompilerThread startup code itself 776 777 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority); 778 779 // Note that we cannot call os::set_priority because it expects Java 780 // priorities and we are *explicitly* using OS priorities so that it's 781 // possible to set the compiler thread priority higher than any Java 782 // thread. 783 784 int native_prio = CompilerThreadPriority; 785 if (native_prio == -1) { 786 if (UseCriticalCompilerThreadPriority) { 787 native_prio = os::java_to_os_priority[CriticalPriority]; 788 } else { 789 native_prio = os::java_to_os_priority[NearMaxPriority]; 790 } 791 } 792 os::set_native_priority(thread, native_prio); 793 794 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle)); 795 796 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle)); 797 if (comp != NULL) { 798 thread->as_CompilerThread()->set_compiler(comp); 799 } 800 Threads::add(thread); 801 Thread::start(thread); 802 } 803 } 804 805 // First release lock before aborting VM. 806 if (thread == NULL || thread->osthread() == NULL) { 807 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) { 808 if (thread != NULL) { 809 thread->smr_delete(); 810 } 811 return NULL; 812 } 813 vm_exit_during_initialization("java.lang.OutOfMemoryError", 814 os::native_thread_creation_failed_msg()); 815 } 816 817 // Let go of Threads_lock before yielding 818 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 819 820 return thread; 821 } 822 823 824 void CompileBroker::init_compiler_sweeper_threads() { 825 EXCEPTION_MARK; 826 #if !defined(ZERO) 827 assert(_c2_count > 0 || _c1_count > 0, "No compilers?"); 828 #endif // !ZERO 829 // Initialize the compilation queue 830 if (_c2_count > 0) { 831 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 832 _c2_compile_queue = new CompileQueue(name); 833 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler); 834 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler); 835 } 836 if (_c1_count > 0) { 837 _c1_compile_queue = new CompileQueue("C1 compile queue"); 838 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler); 839 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler); 840 } 841 842 char name_buffer[256]; 843 844 for (int i = 0; i < _c2_count; i++) { 845 // Create a name for our thread. 846 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 847 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 848 jobject thread_handle = JNIHandles::make_global(thread_oop); 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], 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 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 868 jobject thread_handle = JNIHandles::make_global(thread_oop); 869 _compiler1_objects[i] = thread_handle; 870 _compiler1_logs[i] = NULL; 871 872 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 873 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK); 874 assert(ct != NULL, "should have been handled for initial thread"); 875 _compilers[0]->set_num_compiler_threads(i + 1); 876 if (TraceCompilerThreads) { 877 ResourceMark rm; 878 MutexLocker mu(Threads_lock); 879 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 880 } 881 } 882 } 883 884 if (UsePerfData) { 885 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 886 } 887 888 if (MethodFlushing) { 889 // Initialize the sweeper thread 890 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK); 891 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop()); 892 make_thread(thread_handle, NULL, NULL, CHECK); 893 } 894 } 895 896 void CompileBroker::possibly_add_compiler_threads() { 897 EXCEPTION_MARK; 898 899 julong available_memory = os::available_memory(); 900 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All). 901 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled), 902 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled); 903 904 // Only do attempt to start additional threads if the lock is free. 905 if (!CompileThread_lock->try_lock()) return; 906 907 if (_c2_compile_queue != NULL) { 908 int old_c2_count = _compilers[1]->num_compiler_threads(); 909 int new_c2_count = MIN4(_c2_count, 910 _c2_compile_queue->size() / 2, 911 (int)(available_memory / (200*M)), 912 (int)(available_cc_np / (128*K))); 913 914 for (int i = old_c2_count; i < new_c2_count; i++) { 915 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK); 916 if (ct == NULL) break; 917 _compilers[1]->set_num_compiler_threads(i + 1); 918 if (TraceCompilerThreads) { 919 ResourceMark rm; 920 MutexLocker mu(Threads_lock); 921 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)", 922 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M)); 923 } 924 } 925 } 926 927 if (_c1_compile_queue != NULL) { 928 int old_c1_count = _compilers[0]->num_compiler_threads(); 929 int new_c1_count = MIN4(_c1_count, 930 _c1_compile_queue->size() / 4, 931 (int)(available_memory / (100*M)), 932 (int)(available_cc_p / (128*K))); 933 934 for (int i = old_c1_count; i < new_c1_count; i++) { 935 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK); 936 if (ct == NULL) break; 937 _compilers[0]->set_num_compiler_threads(i + 1); 938 if (TraceCompilerThreads) { 939 ResourceMark rm; 940 MutexLocker mu(Threads_lock); 941 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)", 942 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M)); 943 } 944 } 945 } 946 947 CompileThread_lock->unlock(); 948 } 949 950 951 /** 952 * Set the methods on the stack as on_stack so that redefine classes doesn't 953 * reclaim them. This method is executed at a safepoint. 954 */ 955 void CompileBroker::mark_on_stack() { 956 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 957 // Since we are at a safepoint, we do not need a lock to access 958 // the compile queues. 959 if (_c2_compile_queue != NULL) { 960 _c2_compile_queue->mark_on_stack(); 961 } 962 if (_c1_compile_queue != NULL) { 963 _c1_compile_queue->mark_on_stack(); 964 } 965 } 966 967 // ------------------------------------------------------------------ 968 // CompileBroker::compile_method 969 // 970 // Request compilation of a method. 971 void CompileBroker::compile_method_base(const methodHandle& method, 972 int osr_bci, 973 int comp_level, 974 const methodHandle& hot_method, 975 int hot_count, 976 CompileTask::CompileReason compile_reason, 977 bool blocking, 978 Thread* thread) { 979 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 980 assert(method->method_holder()->is_instance_klass(), 981 "sanity check"); 982 assert(!method->method_holder()->is_not_initialized(), 983 "method holder must be initialized"); 984 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 985 986 if (CIPrintRequests) { 987 tty->print("request: "); 988 method->print_short_name(tty); 989 if (osr_bci != InvocationEntryBci) { 990 tty->print(" osr_bci: %d", osr_bci); 991 } 992 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 993 if (!hot_method.is_null()) { 994 tty->print(" hot: "); 995 if (hot_method() != method()) { 996 hot_method->print_short_name(tty); 997 } else { 998 tty->print("yes"); 999 } 1000 } 1001 tty->cr(); 1002 } 1003 1004 // A request has been made for compilation. Before we do any 1005 // real work, check to see if the method has been compiled 1006 // in the meantime with a definitive result. 1007 if (compilation_is_complete(method, osr_bci, comp_level)) { 1008 return; 1009 } 1010 1011 #ifndef PRODUCT 1012 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1013 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1014 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1015 return; 1016 } 1017 } 1018 #endif 1019 1020 // If this method is already in the compile queue, then 1021 // we do not block the current thread. 1022 if (compilation_is_in_queue(method)) { 1023 // We may want to decay our counter a bit here to prevent 1024 // multiple denied requests for compilation. This is an 1025 // open compilation policy issue. Note: The other possibility, 1026 // in the case that this is a blocking compile request, is to have 1027 // all subsequent blocking requesters wait for completion of 1028 // ongoing compiles. Note that in this case we'll need a protocol 1029 // for freeing the associated compile tasks. [Or we could have 1030 // a single static monitor on which all these waiters sleep.] 1031 return; 1032 } 1033 1034 if (TieredCompilation) { 1035 // Tiered policy requires MethodCounters to exist before adding a method to 1036 // the queue. Create if we don't have them yet. 1037 method->get_method_counters(thread); 1038 } 1039 1040 // Outputs from the following MutexLocker block: 1041 CompileTask* task = NULL; 1042 CompileQueue* queue = compile_queue(comp_level); 1043 1044 // Acquire our lock. 1045 { 1046 MutexLocker locker(MethodCompileQueue_lock, thread); 1047 1048 // Make sure the method has not slipped into the queues since 1049 // last we checked; note that those checks were "fast bail-outs". 1050 // Here we need to be more careful, see 14012000 below. 1051 if (compilation_is_in_queue(method)) { 1052 return; 1053 } 1054 1055 // We need to check again to see if the compilation has 1056 // completed. A previous compilation may have registered 1057 // some result. 1058 if (compilation_is_complete(method, osr_bci, comp_level)) { 1059 return; 1060 } 1061 1062 // We now know that this compilation is not pending, complete, 1063 // or prohibited. Assign a compile_id to this compilation 1064 // and check to see if it is in our [Start..Stop) range. 1065 int compile_id = assign_compile_id(method, osr_bci); 1066 if (compile_id == 0) { 1067 // The compilation falls outside the allowed range. 1068 return; 1069 } 1070 1071 #if INCLUDE_JVMCI 1072 if (UseJVMCICompiler) { 1073 if (blocking) { 1074 // Don't allow blocking compiles for requests triggered by JVMCI. 1075 if (thread->is_Compiler_thread()) { 1076 blocking = false; 1077 } 1078 1079 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1080 vframeStream vfst((JavaThread*) thread); 1081 for (; !vfst.at_end(); vfst.next()) { 1082 if (vfst.method()->is_static_initializer() || 1083 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1084 vfst.method()->name() == vmSymbols::loadClass_name())) { 1085 blocking = false; 1086 break; 1087 } 1088 } 1089 1090 // Don't allow blocking compilation requests to JVMCI 1091 // if JVMCI itself is not yet initialized 1092 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 1093 blocking = false; 1094 } 1095 1096 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1097 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1098 // such as the DestroyJavaVM thread. 1099 if (JVMCIRuntime::shutdown_called()) { 1100 blocking = false; 1101 } 1102 } 1103 } 1104 #endif // INCLUDE_JVMCI 1105 1106 // We will enter the compilation in the queue. 1107 // 14012000: Note that this sets the queued_for_compile bits in 1108 // the target method. We can now reason that a method cannot be 1109 // queued for compilation more than once, as follows: 1110 // Before a thread queues a task for compilation, it first acquires 1111 // the compile queue lock, then checks if the method's queued bits 1112 // are set or it has already been compiled. Thus there can not be two 1113 // instances of a compilation task for the same method on the 1114 // compilation queue. Consider now the case where the compilation 1115 // thread has already removed a task for that method from the queue 1116 // and is in the midst of compiling it. In this case, the 1117 // queued_for_compile bits must be set in the method (and these 1118 // will be visible to the current thread, since the bits were set 1119 // under protection of the compile queue lock, which we hold now. 1120 // When the compilation completes, the compiler thread first sets 1121 // the compilation result and then clears the queued_for_compile 1122 // bits. Neither of these actions are protected by a barrier (or done 1123 // under the protection of a lock), so the only guarantee we have 1124 // (on machines with TSO (Total Store Order)) is that these values 1125 // will update in that order. As a result, the only combinations of 1126 // these bits that the current thread will see are, in temporal order: 1127 // <RESULT, QUEUE> : 1128 // <0, 1> : in compile queue, but not yet compiled 1129 // <1, 1> : compiled but queue bit not cleared 1130 // <1, 0> : compiled and queue bit cleared 1131 // Because we first check the queue bits then check the result bits, 1132 // we are assured that we cannot introduce a duplicate task. 1133 // Note that if we did the tests in the reverse order (i.e. check 1134 // result then check queued bit), we could get the result bit before 1135 // the compilation completed, and the queue bit after the compilation 1136 // completed, and end up introducing a "duplicate" (redundant) task. 1137 // In that case, the compiler thread should first check if a method 1138 // has already been compiled before trying to compile it. 1139 // NOTE: in the event that there are multiple compiler threads and 1140 // there is de-optimization/recompilation, things will get hairy, 1141 // and in that case it's best to protect both the testing (here) of 1142 // these bits, and their updating (here and elsewhere) under a 1143 // common lock. 1144 task = create_compile_task(queue, 1145 compile_id, method, 1146 osr_bci, comp_level, 1147 hot_method, hot_count, compile_reason, 1148 blocking); 1149 } 1150 1151 if (blocking) { 1152 wait_for_completion(task); 1153 } 1154 } 1155 1156 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1157 int comp_level, 1158 const methodHandle& hot_method, int hot_count, 1159 CompileTask::CompileReason compile_reason, 1160 Thread* THREAD) { 1161 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1162 if (!_initialized || comp_level == CompLevel_none) { 1163 return NULL; 1164 } 1165 1166 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1167 assert(comp != NULL, "Ensure we have a compiler"); 1168 1169 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1170 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1171 DirectivesStack::release(directive); 1172 return nm; 1173 } 1174 1175 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1176 int comp_level, 1177 const methodHandle& hot_method, int hot_count, 1178 CompileTask::CompileReason compile_reason, 1179 DirectiveSet* directive, 1180 Thread* THREAD) { 1181 1182 // make sure arguments make sense 1183 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1184 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1185 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1186 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1187 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1188 // allow any levels for WhiteBox 1189 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1190 // return quickly if possible 1191 1192 // lock, make sure that the compilation 1193 // isn't prohibited in a straightforward way. 1194 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1195 if (comp == NULL || !comp->can_compile_method(method) || 1196 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1197 return NULL; 1198 } 1199 1200 #if INCLUDE_JVMCI 1201 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { 1202 return NULL; 1203 } 1204 #endif 1205 1206 if (osr_bci == InvocationEntryBci) { 1207 // standard compilation 1208 CompiledMethod* method_code = method->code(); 1209 if (method_code != NULL && method_code->is_nmethod()) { 1210 if (compilation_is_complete(method, osr_bci, comp_level)) { 1211 return (nmethod*) method_code; 1212 } 1213 } 1214 if (method->is_not_compilable(comp_level)) { 1215 return NULL; 1216 } 1217 } else { 1218 // osr compilation 1219 #ifndef TIERED 1220 // seems like an assert of dubious value 1221 assert(comp_level == CompLevel_highest_tier, 1222 "all OSR compiles are assumed to be at a single compilation level"); 1223 #endif // TIERED 1224 // We accept a higher level osr method 1225 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1226 if (nm != NULL) return nm; 1227 if (method->is_not_osr_compilable(comp_level)) return NULL; 1228 } 1229 1230 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1231 // some prerequisites that are compiler specific 1232 if (comp->is_c2()) { 1233 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1234 // Resolve all classes seen in the signature of the method 1235 // we are compiling. 1236 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1237 } 1238 1239 // If the method is native, do the lookup in the thread requesting 1240 // the compilation. Native lookups can load code, which is not 1241 // permitted during compilation. 1242 // 1243 // Note: A native method implies non-osr compilation which is 1244 // checked with an assertion at the entry of this method. 1245 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1246 bool in_base_library; 1247 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1248 if (HAS_PENDING_EXCEPTION) { 1249 // In case of an exception looking up the method, we just forget 1250 // about it. The interpreter will kick-in and throw the exception. 1251 method->set_not_compilable(); // implies is_not_osr_compilable() 1252 CLEAR_PENDING_EXCEPTION; 1253 return NULL; 1254 } 1255 assert(method->has_native_function(), "must have native code by now"); 1256 } 1257 1258 // RedefineClasses() has replaced this method; just return 1259 if (method->is_old()) { 1260 return NULL; 1261 } 1262 1263 // JVMTI -- post_compile_event requires jmethod_id() that may require 1264 // a lock the compiling thread can not acquire. Prefetch it here. 1265 if (JvmtiExport::should_post_compiled_method_load()) { 1266 method->jmethod_id(); 1267 } 1268 1269 // do the compilation 1270 if (method->is_native()) { 1271 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1272 // The following native methods: 1273 // 1274 // java.lang.Float.intBitsToFloat 1275 // java.lang.Float.floatToRawIntBits 1276 // java.lang.Double.longBitsToDouble 1277 // java.lang.Double.doubleToRawLongBits 1278 // 1279 // are called through the interpreter even if interpreter native stubs 1280 // are not preferred (i.e., calling through adapter handlers is preferred). 1281 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1282 // if the version of the methods from the native libraries is called. 1283 // As the interpreter and the C2-intrinsified version of the methods preserves 1284 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1285 if ((UseSSE >= 1 && 1286 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1287 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1288 (UseSSE >= 2 && 1289 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1290 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1291 return NULL; 1292 } 1293 1294 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1295 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1296 // 1297 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1298 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1299 AdapterHandlerLibrary::create_native_wrapper(method); 1300 } else { 1301 return NULL; 1302 } 1303 } else { 1304 // If the compiler is shut off due to code cache getting full 1305 // fail out now so blocking compiles dont hang the java thread 1306 if (!should_compile_new_jobs()) { 1307 CompilationPolicy::policy()->delay_compilation(method()); 1308 return NULL; 1309 } 1310 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles; 1311 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1312 } 1313 1314 // return requested nmethod 1315 // We accept a higher level osr method 1316 if (osr_bci == InvocationEntryBci) { 1317 CompiledMethod* code = method->code(); 1318 if (code == NULL) { 1319 return (nmethod*) code; 1320 } else { 1321 return code->as_nmethod_or_null(); 1322 } 1323 } 1324 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1325 } 1326 1327 1328 // ------------------------------------------------------------------ 1329 // CompileBroker::compilation_is_complete 1330 // 1331 // See if compilation of this method is already complete. 1332 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1333 int osr_bci, 1334 int comp_level) { 1335 bool is_osr = (osr_bci != standard_entry_bci); 1336 if (is_osr) { 1337 if (method->is_not_osr_compilable(comp_level)) { 1338 return true; 1339 } else { 1340 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1341 return (result != NULL); 1342 } 1343 } else { 1344 if (method->is_not_compilable(comp_level)) { 1345 return true; 1346 } else { 1347 CompiledMethod* result = method->code(); 1348 if (result == NULL) return false; 1349 return comp_level == result->comp_level(); 1350 } 1351 } 1352 } 1353 1354 1355 /** 1356 * See if this compilation is already requested. 1357 * 1358 * Implementation note: there is only a single "is in queue" bit 1359 * for each method. This means that the check below is overly 1360 * conservative in the sense that an osr compilation in the queue 1361 * will block a normal compilation from entering the queue (and vice 1362 * versa). This can be remedied by a full queue search to disambiguate 1363 * cases. If it is deemed profitable, this may be done. 1364 */ 1365 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1366 return method->queued_for_compilation(); 1367 } 1368 1369 // ------------------------------------------------------------------ 1370 // CompileBroker::compilation_is_prohibited 1371 // 1372 // See if this compilation is not allowed. 1373 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1374 bool is_native = method->is_native(); 1375 // Some compilers may not support the compilation of natives. 1376 AbstractCompiler *comp = compiler(comp_level); 1377 if (is_native && 1378 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1379 method->set_not_compilable_quietly(comp_level); 1380 return true; 1381 } 1382 1383 bool is_osr = (osr_bci != standard_entry_bci); 1384 // Some compilers may not support on stack replacement. 1385 if (is_osr && 1386 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1387 method->set_not_osr_compilable(comp_level); 1388 return true; 1389 } 1390 1391 // The method may be explicitly excluded by the user. 1392 double scale; 1393 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1394 bool quietly = CompilerOracle::should_exclude_quietly(); 1395 if (PrintCompilation && !quietly) { 1396 // This does not happen quietly... 1397 ResourceMark rm; 1398 tty->print("### Excluding %s:%s", 1399 method->is_native() ? "generation of native wrapper" : "compile", 1400 (method->is_static() ? " static" : "")); 1401 method->print_short_name(tty); 1402 tty->cr(); 1403 } 1404 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1405 } 1406 1407 return false; 1408 } 1409 1410 /** 1411 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1412 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1413 * The function also allows to generate separate compilation IDs for OSR compilations. 1414 */ 1415 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1416 #ifdef ASSERT 1417 bool is_osr = (osr_bci != standard_entry_bci); 1418 int id; 1419 if (method->is_native()) { 1420 assert(!is_osr, "can't be osr"); 1421 // Adapters, native wrappers and method handle intrinsics 1422 // should be generated always. 1423 return Atomic::add(1, &_compilation_id); 1424 } else if (CICountOSR && is_osr) { 1425 id = Atomic::add(1, &_osr_compilation_id); 1426 if (CIStartOSR <= id && id < CIStopOSR) { 1427 return id; 1428 } 1429 } else { 1430 id = Atomic::add(1, &_compilation_id); 1431 if (CIStart <= id && id < CIStop) { 1432 return id; 1433 } 1434 } 1435 1436 // Method was not in the appropriate compilation range. 1437 method->set_not_compilable_quietly(); 1438 return 0; 1439 #else 1440 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1441 // only _compilation_id is incremented. 1442 return Atomic::add(1, &_compilation_id); 1443 #endif 1444 } 1445 1446 // ------------------------------------------------------------------ 1447 // CompileBroker::assign_compile_id_unlocked 1448 // 1449 // Public wrapper for assign_compile_id that acquires the needed locks 1450 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1451 MutexLocker locker(MethodCompileQueue_lock, thread); 1452 return assign_compile_id(method, osr_bci); 1453 } 1454 1455 // ------------------------------------------------------------------ 1456 // CompileBroker::preload_classes 1457 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1458 // Move this code over from c1_Compiler.cpp 1459 ShouldNotReachHere(); 1460 } 1461 1462 1463 // ------------------------------------------------------------------ 1464 // CompileBroker::create_compile_task 1465 // 1466 // Create a CompileTask object representing the current request for 1467 // compilation. Add this task to the queue. 1468 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1469 int compile_id, 1470 const methodHandle& method, 1471 int osr_bci, 1472 int comp_level, 1473 const methodHandle& hot_method, 1474 int hot_count, 1475 CompileTask::CompileReason compile_reason, 1476 bool blocking) { 1477 CompileTask* new_task = CompileTask::allocate(); 1478 new_task->initialize(compile_id, method, osr_bci, comp_level, 1479 hot_method, hot_count, compile_reason, 1480 blocking); 1481 queue->add(new_task); 1482 return new_task; 1483 } 1484 1485 #if INCLUDE_JVMCI 1486 // The number of milliseconds to wait before checking if 1487 // JVMCI compilation has made progress. 1488 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1489 1490 // The number of JVMCI compilation progress checks that must fail 1491 // before unblocking a thread waiting for a blocking compilation. 1492 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1493 1494 /** 1495 * Waits for a JVMCI compiler to complete a given task. This thread 1496 * waits until either the task completes or it sees no JVMCI compilation 1497 * progress for N consecutive milliseconds where N is 1498 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1499 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1500 * 1501 * @return true if this thread needs to free/recycle the task 1502 */ 1503 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1504 MutexLocker waiter(task->lock(), thread); 1505 int progress_wait_attempts = 0; 1506 int methods_compiled = jvmci->methods_compiled(); 1507 while (!task->is_complete() && !is_compilation_disabled_forever() && 1508 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1509 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1510 1511 bool progress; 1512 if (jvmci_compiler_thread != NULL) { 1513 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress. 1514 progress = jvmci_compiler_thread->thread_state() != _thread_blocked && 1515 !jvmci_compiler_thread->is_external_suspend(); 1516 } else { 1517 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1518 // that all JVMCI compiler threads are blocked on. We use the counter for 1519 // successful JVMCI compilations to determine whether JVMCI compilation 1520 // is still making progress through the JVMCI compiler queue. 1521 progress = jvmci->methods_compiled() != methods_compiled; 1522 } 1523 1524 if (!progress) { 1525 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1526 if (PrintCompilation) { 1527 task->print(tty, "wait for blocking compilation timed out"); 1528 } 1529 break; 1530 } 1531 } else { 1532 progress_wait_attempts = 0; 1533 if (jvmci_compiler_thread == NULL) { 1534 methods_compiled = jvmci->methods_compiled(); 1535 } 1536 } 1537 } 1538 task->clear_waiter(); 1539 return task->is_complete(); 1540 } 1541 #endif 1542 1543 /** 1544 * Wait for the compilation task to complete. 1545 */ 1546 void CompileBroker::wait_for_completion(CompileTask* task) { 1547 if (CIPrintCompileQueue) { 1548 ttyLocker ttyl; 1549 tty->print_cr("BLOCKING FOR COMPILE"); 1550 } 1551 1552 assert(task->is_blocking(), "can only wait on blocking task"); 1553 1554 JavaThread* thread = JavaThread::current(); 1555 thread->set_blocked_on_compilation(true); 1556 1557 methodHandle method(thread, task->method()); 1558 bool free_task; 1559 #if INCLUDE_JVMCI 1560 AbstractCompiler* comp = compiler(task->comp_level()); 1561 if (comp->is_jvmci()) { 1562 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1563 } else 1564 #endif 1565 { 1566 MutexLocker waiter(task->lock(), thread); 1567 free_task = true; 1568 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1569 task->lock()->wait(); 1570 } 1571 } 1572 1573 thread->set_blocked_on_compilation(false); 1574 if (free_task) { 1575 if (is_compilation_disabled_forever()) { 1576 CompileTask::free(task); 1577 return; 1578 } 1579 1580 // It is harmless to check this status without the lock, because 1581 // completion is a stable property (until the task object is recycled). 1582 assert(task->is_complete(), "Compilation should have completed"); 1583 assert(task->code_handle() == NULL, "must be reset"); 1584 1585 // By convention, the waiter is responsible for recycling a 1586 // blocking CompileTask. Since there is only one waiter ever 1587 // waiting on a CompileTask, we know that no one else will 1588 // be using this CompileTask; we can free it. 1589 CompileTask::free(task); 1590 } 1591 } 1592 1593 /** 1594 * Initialize compiler thread(s) + compiler object(s). The postcondition 1595 * of this function is that the compiler runtimes are initialized and that 1596 * compiler threads can start compiling. 1597 */ 1598 bool CompileBroker::init_compiler_runtime() { 1599 CompilerThread* thread = CompilerThread::current(); 1600 AbstractCompiler* comp = thread->compiler(); 1601 // Final sanity check - the compiler object must exist 1602 guarantee(comp != NULL, "Compiler object must exist"); 1603 1604 int system_dictionary_modification_counter; 1605 { 1606 MutexLocker locker(Compile_lock, thread); 1607 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1608 } 1609 1610 { 1611 // Must switch to native to allocate ci_env 1612 ThreadToNativeFromVM ttn(thread); 1613 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1614 // Cache Jvmti state 1615 ci_env.cache_jvmti_state(); 1616 // Cache DTrace flags 1617 ci_env.cache_dtrace_flags(); 1618 1619 // Switch back to VM state to do compiler initialization 1620 ThreadInVMfromNative tv(thread); 1621 ResetNoHandleMark rnhm; 1622 1623 // Perform per-thread and global initializations 1624 comp->initialize(); 1625 } 1626 1627 if (comp->is_failed()) { 1628 disable_compilation_forever(); 1629 // If compiler initialization failed, no compiler thread that is specific to a 1630 // particular compiler runtime will ever start to compile methods. 1631 shutdown_compiler_runtime(comp, thread); 1632 return false; 1633 } 1634 1635 // C1 specific check 1636 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1637 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1638 return false; 1639 } 1640 1641 return true; 1642 } 1643 1644 /** 1645 * If C1 and/or C2 initialization failed, we shut down all compilation. 1646 * We do this to keep things simple. This can be changed if it ever turns 1647 * out to be a problem. 1648 */ 1649 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1650 // Free buffer blob, if allocated 1651 if (thread->get_buffer_blob() != NULL) { 1652 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1653 CodeCache::free(thread->get_buffer_blob()); 1654 } 1655 1656 if (comp->should_perform_shutdown()) { 1657 // There are two reasons for shutting down the compiler 1658 // 1) compiler runtime initialization failed 1659 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1660 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1661 1662 // Only one thread per compiler runtime object enters here 1663 // Set state to shut down 1664 comp->set_shut_down(); 1665 1666 // Delete all queued compilation tasks to make compiler threads exit faster. 1667 if (_c1_compile_queue != NULL) { 1668 _c1_compile_queue->free_all(); 1669 } 1670 1671 if (_c2_compile_queue != NULL) { 1672 _c2_compile_queue->free_all(); 1673 } 1674 1675 // Set flags so that we continue execution with using interpreter only. 1676 UseCompiler = false; 1677 UseInterpreter = true; 1678 1679 // We could delete compiler runtimes also. However, there are references to 1680 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1681 // fail. This can be done later if necessary. 1682 } 1683 } 1684 1685 /** 1686 * Helper function to create new or reuse old CompileLog. 1687 */ 1688 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1689 if (!LogCompilation) return NULL; 1690 1691 AbstractCompiler *compiler = ct->compiler(); 1692 bool c1 = compiler->is_c1(); 1693 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1694 assert(compiler_objects != NULL, "must be initialized at this point"); 1695 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1696 assert(logs != NULL, "must be initialized at this point"); 1697 int count = c1 ? _c1_count : _c2_count; 1698 1699 // Find Compiler number by its threadObj. 1700 oop compiler_obj = ct->threadObj(); 1701 int compiler_number = 0; 1702 bool found = false; 1703 for (; compiler_number < count; compiler_number++) { 1704 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) { 1705 found = true; 1706 break; 1707 } 1708 } 1709 assert(found, "Compiler must exist at this point"); 1710 1711 // Determine pointer for this thread's log. 1712 CompileLog** log_ptr = &logs[compiler_number]; 1713 1714 // Return old one if it exists. 1715 CompileLog* log = *log_ptr; 1716 if (log != NULL) { 1717 ct->init_log(log); 1718 return log; 1719 } 1720 1721 // Create a new one and remember it. 1722 init_compiler_thread_log(); 1723 log = ct->log(); 1724 *log_ptr = log; 1725 return log; 1726 } 1727 1728 // ------------------------------------------------------------------ 1729 // CompileBroker::compiler_thread_loop 1730 // 1731 // The main loop run by a CompilerThread. 1732 void CompileBroker::compiler_thread_loop() { 1733 CompilerThread* thread = CompilerThread::current(); 1734 CompileQueue* queue = thread->queue(); 1735 // For the thread that initializes the ciObjectFactory 1736 // this resource mark holds all the shared objects 1737 ResourceMark rm; 1738 1739 // First thread to get here will initialize the compiler interface 1740 1741 { 1742 ASSERT_IN_VM; 1743 MutexLocker only_one (CompileThread_lock, thread); 1744 if (!ciObjectFactory::is_initialized()) { 1745 ciObjectFactory::initialize(); 1746 } 1747 } 1748 1749 // Open a log. 1750 CompileLog* log = get_log(thread); 1751 if (log != NULL) { 1752 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1753 thread->name(), 1754 os::current_thread_id(), 1755 os::current_process_id()); 1756 log->stamp(); 1757 log->end_elem(); 1758 } 1759 1760 // If compiler thread/runtime initialization fails, exit the compiler thread 1761 if (!init_compiler_runtime()) { 1762 return; 1763 } 1764 1765 thread->start_idle_timer(); 1766 1767 // Poll for new compilation tasks as long as the JVM runs. Compilation 1768 // should only be disabled if something went wrong while initializing the 1769 // compiler runtimes. This, in turn, should not happen. The only known case 1770 // when compiler runtime initialization fails is if there is not enough free 1771 // space in the code cache to generate the necessary stubs, etc. 1772 while (!is_compilation_disabled_forever()) { 1773 // We need this HandleMark to avoid leaking VM handles. 1774 HandleMark hm(thread); 1775 1776 CompileTask* task = queue->get(); 1777 if (task == NULL) { 1778 if (UseDynamicNumberOfCompilerThreads) { 1779 // Access compiler_count under lock to enforce consistency. 1780 MutexLocker only_one(CompileThread_lock); 1781 if (can_remove(thread, true)) { 1782 if (TraceCompilerThreads) { 1783 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1784 thread->name(), thread->idle_time_millis()); 1785 } 1786 // Free buffer blob, if allocated 1787 if (thread->get_buffer_blob() != NULL) { 1788 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1789 CodeCache::free(thread->get_buffer_blob()); 1790 } 1791 return; // Stop this thread. 1792 } 1793 } 1794 } else { 1795 // Assign the task to the current thread. Mark this compilation 1796 // thread as active for the profiler. 1797 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition 1798 // occurs after fetching the compile task off the queue. 1799 CompileTaskWrapper ctw(task); 1800 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1801 task->set_code_handle(&result_handle); 1802 methodHandle method(thread, task->method()); 1803 1804 // Never compile a method if breakpoints are present in it 1805 if (method()->number_of_breakpoints() == 0) { 1806 // Compile the method. 1807 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1808 invoke_compiler_on_method(task); 1809 thread->start_idle_timer(); 1810 } else { 1811 // After compilation is disabled, remove remaining methods from queue 1812 method->clear_queued_for_compilation(); 1813 task->set_failure_reason("compilation is disabled"); 1814 } 1815 } 1816 1817 if (UseDynamicNumberOfCompilerThreads) { 1818 possibly_add_compiler_threads(); 1819 } 1820 } 1821 } 1822 1823 // Shut down compiler runtime 1824 shutdown_compiler_runtime(thread->compiler(), thread); 1825 } 1826 1827 // ------------------------------------------------------------------ 1828 // CompileBroker::init_compiler_thread_log 1829 // 1830 // Set up state required by +LogCompilation. 1831 void CompileBroker::init_compiler_thread_log() { 1832 CompilerThread* thread = CompilerThread::current(); 1833 char file_name[4*K]; 1834 FILE* fp = NULL; 1835 intx thread_id = os::current_thread_id(); 1836 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1837 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1838 if (dir == NULL) { 1839 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1840 thread_id, os::current_process_id()); 1841 } else { 1842 jio_snprintf(file_name, sizeof(file_name), 1843 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1844 os::file_separator(), thread_id, os::current_process_id()); 1845 } 1846 1847 fp = fopen(file_name, "wt"); 1848 if (fp != NULL) { 1849 if (LogCompilation && Verbose) { 1850 tty->print_cr("Opening compilation log %s", file_name); 1851 } 1852 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1853 if (log == NULL) { 1854 fclose(fp); 1855 return; 1856 } 1857 thread->init_log(log); 1858 1859 if (xtty != NULL) { 1860 ttyLocker ttyl; 1861 // Record any per thread log files 1862 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1863 } 1864 return; 1865 } 1866 } 1867 warning("Cannot open log file: %s", file_name); 1868 } 1869 1870 void CompileBroker::log_metaspace_failure() { 1871 const char* message = "some methods may not be compiled because metaspace " 1872 "is out of memory"; 1873 if (_compilation_log != NULL) { 1874 _compilation_log->log_metaspace_failure(message); 1875 } 1876 if (PrintCompilation) { 1877 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1878 } 1879 } 1880 1881 1882 // ------------------------------------------------------------------ 1883 // CompileBroker::set_should_block 1884 // 1885 // Set _should_block. 1886 // Call this from the VM, with Threads_lock held and a safepoint requested. 1887 void CompileBroker::set_should_block() { 1888 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1889 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1890 #ifndef PRODUCT 1891 if (PrintCompilation && (Verbose || WizardMode)) 1892 tty->print_cr("notifying compiler thread pool to block"); 1893 #endif 1894 _should_block = true; 1895 } 1896 1897 // ------------------------------------------------------------------ 1898 // CompileBroker::maybe_block 1899 // 1900 // Call this from the compiler at convenient points, to poll for _should_block. 1901 void CompileBroker::maybe_block() { 1902 if (_should_block) { 1903 #ifndef PRODUCT 1904 if (PrintCompilation && (Verbose || WizardMode)) 1905 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1906 #endif 1907 ThreadInVMfromNative tivfn(JavaThread::current()); 1908 } 1909 } 1910 1911 // wrapper for CodeCache::print_summary() 1912 static void codecache_print(bool detailed) 1913 { 1914 ResourceMark rm; 1915 stringStream s; 1916 // Dump code cache into a buffer before locking the tty, 1917 { 1918 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1919 CodeCache::print_summary(&s, detailed); 1920 } 1921 ttyLocker ttyl; 1922 tty->print("%s", s.as_string()); 1923 } 1924 1925 // wrapper for CodeCache::print_summary() using outputStream 1926 static void codecache_print(outputStream* out, bool detailed) { 1927 ResourceMark rm; 1928 stringStream s; 1929 1930 // Dump code cache into a buffer 1931 { 1932 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1933 CodeCache::print_summary(&s, detailed); 1934 } 1935 1936 char* remaining_log = s.as_string(); 1937 while (*remaining_log != '\0') { 1938 char* eol = strchr(remaining_log, '\n'); 1939 if (eol == NULL) { 1940 out->print_cr("%s", remaining_log); 1941 remaining_log = remaining_log + strlen(remaining_log); 1942 } else { 1943 *eol = '\0'; 1944 out->print_cr("%s", remaining_log); 1945 remaining_log = eol + 1; 1946 } 1947 } 1948 } 1949 1950 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env, 1951 int compilable, const char* failure_reason) { 1952 if (success) { 1953 task->mark_success(); 1954 if (ci_env != NULL) { 1955 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1956 } 1957 if (_compilation_log != NULL) { 1958 nmethod* code = task->code(); 1959 if (code != NULL) { 1960 _compilation_log->log_nmethod(thread, code); 1961 } 1962 } 1963 } else if (AbortVMOnCompilationFailure) { 1964 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1965 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason); 1966 } 1967 if (compilable == ciEnv::MethodCompilable_never) { 1968 fatal("Never compilable: %s", failure_reason); 1969 } 1970 } 1971 // simulate crash during compilation 1972 assert(task->compile_id() != CICrashAt, "just as planned"); 1973 } 1974 1975 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 1976 assert(event != NULL, "invariant"); 1977 assert(event->should_commit(), "invariant"); 1978 event->set_method(task->method()); 1979 event->set_compileId(task->compile_id()); 1980 event->set_compileLevel(task->comp_level()); 1981 event->set_succeded(task->is_success()); 1982 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1983 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1984 event->set_inlinedBytes(task->num_inlined_bytecodes()); 1985 event->commit(); 1986 } 1987 1988 int DirectivesStack::_depth = 0; 1989 CompilerDirectives* DirectivesStack::_top = NULL; 1990 CompilerDirectives* DirectivesStack::_bottom = NULL; 1991 1992 // ------------------------------------------------------------------ 1993 // CompileBroker::invoke_compiler_on_method 1994 // 1995 // Compile a method. 1996 // 1997 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1998 task->print_ul(); 1999 if (PrintCompilation) { 2000 ResourceMark rm; 2001 task->print_tty(); 2002 } 2003 elapsedTimer time; 2004 2005 CompilerThread* thread = CompilerThread::current(); 2006 ResourceMark rm(thread); 2007 2008 if (LogEvents) { 2009 _compilation_log->log_compile(thread, task); 2010 } 2011 2012 // Common flags. 2013 uint compile_id = task->compile_id(); 2014 int osr_bci = task->osr_bci(); 2015 bool is_osr = (osr_bci != standard_entry_bci); 2016 bool should_log = (thread->log() != NULL); 2017 bool should_break = false; 2018 const int task_level = task->comp_level(); 2019 AbstractCompiler* comp = task->compiler(); 2020 2021 DirectiveSet* directive; 2022 { 2023 // create the handle inside it's own block so it can't 2024 // accidentally be referenced once the thread transitions to 2025 // native. The NoHandleMark before the transition should catch 2026 // any cases where this occurs in the future. 2027 methodHandle method(thread, task->method()); 2028 assert(!method->is_native(), "no longer compile natives"); 2029 2030 // Look up matching directives 2031 directive = DirectivesStack::getMatchingDirective(method, comp); 2032 2033 // Save information about this method in case of failure. 2034 set_last_compile(thread, method, is_osr, task_level); 2035 2036 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2037 } 2038 2039 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2040 if (should_log && !directive->LogOption) { 2041 should_log = false; 2042 } 2043 2044 // Allocate a new set of JNI handles. 2045 push_jni_handle_block(); 2046 Method* target_handle = task->method(); 2047 int compilable = ciEnv::MethodCompilable; 2048 const char* failure_reason = NULL; 2049 bool failure_reason_on_C_heap = false; 2050 const char* retry_message = NULL; 2051 2052 int system_dictionary_modification_counter; 2053 { 2054 MutexLocker locker(Compile_lock, thread); 2055 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 2056 } 2057 2058 #if INCLUDE_JVMCI 2059 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2060 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2061 2062 TraceTime t1("compilation", &time); 2063 EventCompilation event; 2064 2065 // Skip redefined methods 2066 if (target_handle->is_old()) { 2067 failure_reason = "redefined method"; 2068 retry_message = "not retryable"; 2069 compilable = ciEnv::MethodCompilable_never; 2070 } else { 2071 JVMCIEnv env(task, system_dictionary_modification_counter); 2072 methodHandle method(thread, target_handle); 2073 jvmci->compile_method(method, osr_bci, &env); 2074 2075 failure_reason = env.failure_reason(); 2076 failure_reason_on_C_heap = env.failure_reason_on_C_heap(); 2077 if (!env.retryable()) { 2078 retry_message = "not retryable"; 2079 compilable = ciEnv::MethodCompilable_not_at_tier; 2080 } 2081 } 2082 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason); 2083 if (event.should_commit()) { 2084 post_compilation_event(&event, task); 2085 } 2086 2087 } else 2088 #endif // INCLUDE_JVMCI 2089 { 2090 NoHandleMark nhm; 2091 ThreadToNativeFromVM ttn(thread); 2092 2093 ciEnv ci_env(task, system_dictionary_modification_counter); 2094 if (should_break) { 2095 ci_env.set_break_at_compile(true); 2096 } 2097 if (should_log) { 2098 ci_env.set_log(thread->log()); 2099 } 2100 assert(thread->env() == &ci_env, "set by ci_env"); 2101 // The thread-env() field is cleared in ~CompileTaskWrapper. 2102 2103 // Cache Jvmti state 2104 ci_env.cache_jvmti_state(); 2105 2106 // Cache DTrace flags 2107 ci_env.cache_dtrace_flags(); 2108 2109 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2110 2111 TraceTime t1("compilation", &time); 2112 EventCompilation event; 2113 2114 if (comp == NULL) { 2115 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2116 } else { 2117 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2118 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2119 while (WhiteBox::compilation_locked) { 2120 locker.wait(Mutex::_no_safepoint_check_flag); 2121 } 2122 } 2123 comp->compile_method(&ci_env, target, osr_bci, directive); 2124 } 2125 2126 if (!ci_env.failing() && task->code() == NULL) { 2127 //assert(false, "compiler should always document failure"); 2128 // The compiler elected, without comment, not to register a result. 2129 // Do not attempt further compilations of this method. 2130 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2131 } 2132 2133 // Copy this bit to the enclosing block: 2134 compilable = ci_env.compilable(); 2135 2136 if (ci_env.failing()) { 2137 failure_reason = ci_env.failure_reason(); 2138 retry_message = ci_env.retry_message(); 2139 ci_env.report_failure(failure_reason); 2140 } 2141 2142 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason); 2143 if (event.should_commit()) { 2144 post_compilation_event(&event, task); 2145 } 2146 } 2147 // Remove the JNI handle block after the ciEnv destructor has run in 2148 // the previous block. 2149 pop_jni_handle_block(); 2150 2151 if (failure_reason != NULL) { 2152 task->set_failure_reason(failure_reason, failure_reason_on_C_heap); 2153 if (_compilation_log != NULL) { 2154 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2155 } 2156 if (PrintCompilation) { 2157 FormatBufferResource msg = retry_message != NULL ? 2158 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2159 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2160 task->print(tty, msg); 2161 } 2162 } 2163 2164 methodHandle method(thread, task->method()); 2165 2166 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2167 2168 collect_statistics(thread, time, task); 2169 2170 nmethod* nm = task->code(); 2171 if (nm != NULL) { 2172 nm->maybe_print_nmethod(directive); 2173 } 2174 DirectivesStack::release(directive); 2175 2176 if (PrintCompilation && PrintCompilation2) { 2177 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2178 tty->print("%4d ", compile_id); // print compilation number 2179 tty->print("%s ", (is_osr ? "%" : " ")); 2180 if (task->code() != NULL) { 2181 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2182 } 2183 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2184 } 2185 2186 Log(compilation, codecache) log; 2187 if (log.is_debug()) { 2188 LogStream ls(log.debug()); 2189 codecache_print(&ls, /* detailed= */ false); 2190 } 2191 if (PrintCodeCacheOnCompilation) { 2192 codecache_print(/* detailed= */ false); 2193 } 2194 // Disable compilation, if required. 2195 switch (compilable) { 2196 case ciEnv::MethodCompilable_never: 2197 if (is_osr) 2198 method->set_not_osr_compilable_quietly(); 2199 else 2200 method->set_not_compilable_quietly(); 2201 break; 2202 case ciEnv::MethodCompilable_not_at_tier: 2203 if (is_osr) 2204 method->set_not_osr_compilable_quietly(task_level); 2205 else 2206 method->set_not_compilable_quietly(task_level); 2207 break; 2208 } 2209 2210 // Note that the queued_for_compilation bits are cleared without 2211 // protection of a mutex. [They were set by the requester thread, 2212 // when adding the task to the compile queue -- at which time the 2213 // compile queue lock was held. Subsequently, we acquired the compile 2214 // queue lock to get this task off the compile queue; thus (to belabour 2215 // the point somewhat) our clearing of the bits must be occurring 2216 // only after the setting of the bits. See also 14012000 above. 2217 method->clear_queued_for_compilation(); 2218 } 2219 2220 /** 2221 * The CodeCache is full. Print warning and disable compilation. 2222 * Schedule code cache cleaning so compilation can continue later. 2223 * This function needs to be called only from CodeCache::allocate(), 2224 * since we currently handle a full code cache uniformly. 2225 */ 2226 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2227 UseInterpreter = true; 2228 if (UseCompiler || AlwaysCompileLoopMethods ) { 2229 if (xtty != NULL) { 2230 ResourceMark rm; 2231 stringStream s; 2232 // Dump code cache state into a buffer before locking the tty, 2233 // because log_state() will use locks causing lock conflicts. 2234 CodeCache::log_state(&s); 2235 // Lock to prevent tearing 2236 ttyLocker ttyl; 2237 xtty->begin_elem("code_cache_full"); 2238 xtty->print("%s", s.as_string()); 2239 xtty->stamp(); 2240 xtty->end_elem(); 2241 } 2242 2243 #ifndef PRODUCT 2244 if (ExitOnFullCodeCache) { 2245 codecache_print(/* detailed= */ true); 2246 before_exit(JavaThread::current()); 2247 exit_globals(); // will delete tty 2248 vm_direct_exit(1); 2249 } 2250 #endif 2251 if (UseCodeCacheFlushing) { 2252 // Since code cache is full, immediately stop new compiles 2253 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2254 NMethodSweeper::log_sweep("disable_compiler"); 2255 } 2256 } else { 2257 disable_compilation_forever(); 2258 } 2259 2260 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2261 } 2262 } 2263 2264 // ------------------------------------------------------------------ 2265 // CompileBroker::set_last_compile 2266 // 2267 // Record this compilation for debugging purposes. 2268 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2269 ResourceMark rm; 2270 char* method_name = method->name()->as_C_string(); 2271 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2272 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2273 char current_method[CompilerCounters::cmname_buffer_length]; 2274 size_t maxLen = CompilerCounters::cmname_buffer_length; 2275 2276 if (UsePerfData) { 2277 const char* class_name = method->method_holder()->name()->as_C_string(); 2278 2279 size_t s1len = strlen(class_name); 2280 size_t s2len = strlen(method_name); 2281 2282 // check if we need to truncate the string 2283 if (s1len + s2len + 2 > maxLen) { 2284 2285 // the strategy is to lop off the leading characters of the 2286 // class name and the trailing characters of the method name. 2287 2288 if (s2len + 2 > maxLen) { 2289 // lop of the entire class name string, let snprintf handle 2290 // truncation of the method name. 2291 class_name += s1len; // null string 2292 } 2293 else { 2294 // lop off the extra characters from the front of the class name 2295 class_name += ((s1len + s2len + 2) - maxLen); 2296 } 2297 } 2298 2299 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2300 } 2301 2302 if (CICountOSR && is_osr) { 2303 _last_compile_type = osr_compile; 2304 } else { 2305 _last_compile_type = normal_compile; 2306 } 2307 _last_compile_level = comp_level; 2308 2309 if (UsePerfData) { 2310 CompilerCounters* counters = thread->counters(); 2311 counters->set_current_method(current_method); 2312 counters->set_compile_type((jlong)_last_compile_type); 2313 } 2314 } 2315 2316 2317 // ------------------------------------------------------------------ 2318 // CompileBroker::push_jni_handle_block 2319 // 2320 // Push on a new block of JNI handles. 2321 void CompileBroker::push_jni_handle_block() { 2322 JavaThread* thread = JavaThread::current(); 2323 2324 // Allocate a new block for JNI handles. 2325 // Inlined code from jni_PushLocalFrame() 2326 JNIHandleBlock* java_handles = thread->active_handles(); 2327 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2328 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2329 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2330 thread->set_active_handles(compile_handles); 2331 } 2332 2333 2334 // ------------------------------------------------------------------ 2335 // CompileBroker::pop_jni_handle_block 2336 // 2337 // Pop off the current block of JNI handles. 2338 void CompileBroker::pop_jni_handle_block() { 2339 JavaThread* thread = JavaThread::current(); 2340 2341 // Release our JNI handle block 2342 JNIHandleBlock* compile_handles = thread->active_handles(); 2343 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2344 thread->set_active_handles(java_handles); 2345 compile_handles->set_pop_frame_link(NULL); 2346 JNIHandleBlock::release_block(compile_handles, thread); // may block 2347 } 2348 2349 // ------------------------------------------------------------------ 2350 // CompileBroker::collect_statistics 2351 // 2352 // Collect statistics about the compilation. 2353 2354 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2355 bool success = task->is_success(); 2356 methodHandle method (thread, task->method()); 2357 uint compile_id = task->compile_id(); 2358 bool is_osr = (task->osr_bci() != standard_entry_bci); 2359 nmethod* code = task->code(); 2360 CompilerCounters* counters = thread->counters(); 2361 2362 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2363 MutexLocker locker(CompileStatistics_lock); 2364 2365 // _perf variables are production performance counters which are 2366 // updated regardless of the setting of the CITime and CITimeEach flags 2367 // 2368 2369 // account all time, including bailouts and failures in this counter; 2370 // C1 and C2 counters are counting both successful and unsuccessful compiles 2371 _t_total_compilation.add(time); 2372 2373 if (!success) { 2374 _total_bailout_count++; 2375 if (UsePerfData) { 2376 _perf_last_failed_method->set_value(counters->current_method()); 2377 _perf_last_failed_type->set_value(counters->compile_type()); 2378 _perf_total_bailout_count->inc(); 2379 } 2380 _t_bailedout_compilation.add(time); 2381 } else if (code == NULL) { 2382 if (UsePerfData) { 2383 _perf_last_invalidated_method->set_value(counters->current_method()); 2384 _perf_last_invalidated_type->set_value(counters->compile_type()); 2385 _perf_total_invalidated_count->inc(); 2386 } 2387 _total_invalidated_count++; 2388 _t_invalidated_compilation.add(time); 2389 } else { 2390 // Compilation succeeded 2391 2392 // update compilation ticks - used by the implementation of 2393 // java.lang.management.CompilationMBean 2394 _perf_total_compilation->inc(time.ticks()); 2395 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2396 2397 if (CITime) { 2398 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2399 if (is_osr) { 2400 _t_osr_compilation.add(time); 2401 _sum_osr_bytes_compiled += bytes_compiled; 2402 } else { 2403 _t_standard_compilation.add(time); 2404 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2405 } 2406 2407 #if INCLUDE_JVMCI 2408 AbstractCompiler* comp = compiler(task->comp_level()); 2409 if (comp) { 2410 CompilerStatistics* stats = comp->stats(); 2411 if (stats) { 2412 if (is_osr) { 2413 stats->_osr.update(time, bytes_compiled); 2414 } else { 2415 stats->_standard.update(time, bytes_compiled); 2416 } 2417 stats->_nmethods_size += code->total_size(); 2418 stats->_nmethods_code_size += code->insts_size(); 2419 } else { // if (!stats) 2420 assert(false, "Compiler statistics object must exist"); 2421 } 2422 } else { // if (!comp) 2423 assert(false, "Compiler object must exist"); 2424 } 2425 #endif // INCLUDE_JVMCI 2426 } 2427 2428 if (UsePerfData) { 2429 // save the name of the last method compiled 2430 _perf_last_method->set_value(counters->current_method()); 2431 _perf_last_compile_type->set_value(counters->compile_type()); 2432 _perf_last_compile_size->set_value(method->code_size() + 2433 task->num_inlined_bytecodes()); 2434 if (is_osr) { 2435 _perf_osr_compilation->inc(time.ticks()); 2436 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2437 } else { 2438 _perf_standard_compilation->inc(time.ticks()); 2439 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2440 } 2441 } 2442 2443 if (CITimeEach) { 2444 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2445 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2446 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2447 } 2448 2449 // Collect counts of successful compilations 2450 _sum_nmethod_size += code->total_size(); 2451 _sum_nmethod_code_size += code->insts_size(); 2452 _total_compile_count++; 2453 2454 if (UsePerfData) { 2455 _perf_sum_nmethod_size->inc( code->total_size()); 2456 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2457 _perf_total_compile_count->inc(); 2458 } 2459 2460 if (is_osr) { 2461 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2462 _total_osr_compile_count++; 2463 } else { 2464 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2465 _total_standard_compile_count++; 2466 } 2467 } 2468 // set the current method for the thread to null 2469 if (UsePerfData) counters->set_current_method(""); 2470 } 2471 2472 const char* CompileBroker::compiler_name(int comp_level) { 2473 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2474 if (comp == NULL) { 2475 return "no compiler"; 2476 } else { 2477 return (comp->name()); 2478 } 2479 } 2480 2481 #if INCLUDE_JVMCI 2482 void CompileBroker::print_times(AbstractCompiler* comp) { 2483 CompilerStatistics* stats = comp->stats(); 2484 if (stats) { 2485 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}", 2486 comp->name(), stats->bytes_per_second(), 2487 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2488 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2489 stats->_nmethods_size, stats->_nmethods_code_size); 2490 } else { // if (!stats) 2491 assert(false, "Compiler statistics object must exist"); 2492 } 2493 comp->print_timers(); 2494 } 2495 #endif // INCLUDE_JVMCI 2496 2497 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2498 #if INCLUDE_JVMCI 2499 elapsedTimer standard_compilation; 2500 elapsedTimer total_compilation; 2501 elapsedTimer osr_compilation; 2502 2503 int standard_bytes_compiled = 0; 2504 int osr_bytes_compiled = 0; 2505 2506 int standard_compile_count = 0; 2507 int osr_compile_count = 0; 2508 int total_compile_count = 0; 2509 2510 int nmethods_size = 0; 2511 int nmethods_code_size = 0; 2512 bool printedHeader = false; 2513 2514 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2515 AbstractCompiler* comp = _compilers[i]; 2516 if (comp != NULL) { 2517 if (per_compiler && aggregate && !printedHeader) { 2518 printedHeader = true; 2519 tty->cr(); 2520 tty->print_cr("Individual compiler times (for compiled methods only)"); 2521 tty->print_cr("------------------------------------------------"); 2522 tty->cr(); 2523 } 2524 CompilerStatistics* stats = comp->stats(); 2525 2526 if (stats) { 2527 standard_compilation.add(stats->_standard._time); 2528 osr_compilation.add(stats->_osr._time); 2529 2530 standard_bytes_compiled += stats->_standard._bytes; 2531 osr_bytes_compiled += stats->_osr._bytes; 2532 2533 standard_compile_count += stats->_standard._count; 2534 osr_compile_count += stats->_osr._count; 2535 2536 nmethods_size += stats->_nmethods_size; 2537 nmethods_code_size += stats->_nmethods_code_size; 2538 } else { // if (!stats) 2539 assert(false, "Compiler statistics object must exist"); 2540 } 2541 2542 if (per_compiler) { 2543 print_times(comp); 2544 } 2545 } 2546 } 2547 total_compile_count = osr_compile_count + standard_compile_count; 2548 total_compilation.add(osr_compilation); 2549 total_compilation.add(standard_compilation); 2550 2551 // In hosted mode, print the JVMCI compiler specific counters manually. 2552 if (!UseJVMCICompiler) { 2553 JVMCICompiler::print_compilation_timers(); 2554 } 2555 #else // INCLUDE_JVMCI 2556 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2557 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2558 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2559 2560 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2561 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2562 2563 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2564 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2565 int total_compile_count = CompileBroker::_total_compile_count; 2566 2567 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2568 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2569 #endif // INCLUDE_JVMCI 2570 2571 if (!aggregate) { 2572 return; 2573 } 2574 tty->cr(); 2575 tty->print_cr("Accumulated compiler times"); 2576 tty->print_cr("----------------------------------------------------------"); 2577 //0000000000111111111122222222223333333333444444444455555555556666666666 2578 //0123456789012345678901234567890123456789012345678901234567890123456789 2579 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2580 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2581 standard_compilation.seconds(), 2582 standard_compilation.seconds() / standard_compile_count); 2583 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2584 CompileBroker::_t_bailedout_compilation.seconds(), 2585 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2586 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2587 osr_compilation.seconds(), 2588 osr_compilation.seconds() / osr_compile_count); 2589 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2590 CompileBroker::_t_invalidated_compilation.seconds(), 2591 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2592 2593 AbstractCompiler *comp = compiler(CompLevel_simple); 2594 if (comp != NULL) { 2595 tty->cr(); 2596 comp->print_timers(); 2597 } 2598 comp = compiler(CompLevel_full_optimization); 2599 if (comp != NULL) { 2600 tty->cr(); 2601 comp->print_timers(); 2602 } 2603 tty->cr(); 2604 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2605 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2606 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2607 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2608 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2609 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2610 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2611 double tcs = total_compilation.seconds(); 2612 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2613 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2614 tty->cr(); 2615 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2616 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2617 } 2618 2619 // Debugging output for failure 2620 void CompileBroker::print_last_compile() { 2621 if (_last_compile_level != CompLevel_none && 2622 compiler(_last_compile_level) != NULL && 2623 _last_compile_type != no_compile) { 2624 if (_last_compile_type == osr_compile) { 2625 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2626 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2627 } else { 2628 tty->print_cr("Last parse: %d+++(%d) %s", 2629 _compilation_id, _last_compile_level, _last_method_compiled); 2630 } 2631 } 2632 } 2633 2634 // Print general/accumulated JIT information. 2635 void CompileBroker::print_info(outputStream *out) { 2636 if (out == NULL) out = tty; 2637 out->cr(); 2638 out->print_cr("======================"); 2639 out->print_cr(" General JIT info "); 2640 out->print_cr("======================"); 2641 out->cr(); 2642 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2643 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2644 out->cr(); 2645 out->print_cr("CodeCache overview"); 2646 out->print_cr("--------------------------------------------------------"); 2647 out->cr(); 2648 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2649 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2650 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2651 out->cr(); 2652 2653 out->cr(); 2654 out->print_cr("CodeCache cleaning overview"); 2655 out->print_cr("--------------------------------------------------------"); 2656 out->cr(); 2657 NMethodSweeper::print(out); 2658 out->print_cr("--------------------------------------------------------"); 2659 out->cr(); 2660 } 2661 2662 // Note: tty_lock must not be held upon entry to this function. 2663 // Print functions called from herein do "micro-locking" on tty_lock. 2664 // That's a tradeoff which keeps together important blocks of output. 2665 // At the same time, continuous tty_lock hold time is kept in check, 2666 // preventing concurrently printing threads from stalling a long time. 2667 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) { 2668 TimeStamp ts_total; 2669 TimeStamp ts_global; 2670 TimeStamp ts; 2671 2672 bool allFun = !strcmp(function, "all"); 2673 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2674 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2675 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2676 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2677 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2678 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2679 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2680 bool discard = !strcmp(function, "discard") || allFun; 2681 2682 if (out == NULL) { 2683 out = tty; 2684 } 2685 2686 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2687 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2688 out->cr(); 2689 return; 2690 } 2691 2692 ts_total.update(); // record starting point 2693 2694 if (aggregate) { 2695 print_info(out); 2696 } 2697 2698 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2699 // That prevents another thread from destroying our view on the CodeHeap. 2700 // When we request individual parts of the analysis via the jcmd interface, it is possible 2701 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2702 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2703 // across user interaction. 2704 // Acquire this lock before acquiring the CodeCache_lock. 2705 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2706 // leading to an unnecessarily long hold time of the CodeCache_lock. 2707 ts.update(); // record starting point 2708 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2709 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds()); 2710 2711 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock 2712 // for the entire duration of aggregation and printing. That makes sure 2713 // we see a consistent picture and do not run into issues caused by 2714 // the CodeHeap being altered concurrently. 2715 Monitor* global_lock = allFun ? CodeCache_lock : NULL; 2716 Monitor* function_lock = allFun ? NULL : CodeCache_lock; 2717 ts_global.update(); // record starting point 2718 MutexLockerEx mu2(global_lock, Mutex::_no_safepoint_check_flag); 2719 if (global_lock != NULL) { 2720 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds()); 2721 ts_global.update(); // record starting point 2722 } 2723 2724 if (aggregate) { 2725 ts.update(); // record starting point 2726 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag); 2727 if (function_lock != NULL) { 2728 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds()); 2729 } 2730 2731 ts.update(); // record starting point 2732 CodeCache::aggregate(out, granularity); 2733 if (function_lock != NULL) { 2734 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds()); 2735 } 2736 } 2737 2738 if (usedSpace) CodeCache::print_usedSpace(out); 2739 if (freeSpace) CodeCache::print_freeSpace(out); 2740 if (methodCount) CodeCache::print_count(out); 2741 if (methodSpace) CodeCache::print_space(out); 2742 if (methodAge) CodeCache::print_age(out); 2743 if (methodNames) { 2744 // print_names() has shown to be sensitive to concurrent CodeHeap modifications. 2745 // Therefore, request the CodeCache_lock before calling... 2746 MutexLockerEx mu3(function_lock, Mutex::_no_safepoint_check_flag); 2747 CodeCache::print_names(out); 2748 } 2749 if (discard) CodeCache::discard(out); 2750 2751 if (global_lock != NULL) { 2752 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds()); 2753 } 2754 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds()); 2755 }