1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "code/codeHeapState.hpp" 32 #include "code/dependencyContext.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "compiler/compileLog.hpp" 35 #include "compiler/compilerOracle.hpp" 36 #include "compiler/directivesParser.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "jfr/jfrEvents.hpp" 39 #include "logging/log.hpp" 40 #include "logging/logStream.hpp" 41 #include "memory/allocation.inline.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "oops/methodData.hpp" 44 #include "oops/method.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "prims/whitebox.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/atomic.hpp" 50 #include "runtime/compilationPolicy.hpp" 51 #include "runtime/init.hpp" 52 #include "runtime/interfaceSupport.inline.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/jniHandles.inline.hpp" 55 #include "runtime/os.hpp" 56 #include "runtime/safepointVerifiers.hpp" 57 #include "runtime/sharedRuntime.hpp" 58 #include "runtime/sweeper.hpp" 59 #include "runtime/timerTrace.hpp" 60 #include "runtime/vframe.inline.hpp" 61 #include "utilities/debug.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/events.hpp" 64 #include "utilities/formatBuffer.hpp" 65 #include "utilities/macros.hpp" 66 #ifdef COMPILER1 67 #include "c1/c1_Compiler.hpp" 68 #endif 69 #if INCLUDE_JVMCI 70 #include "jvmci/jvmciCompiler.hpp" 71 #include "jvmci/jvmciRuntime.hpp" 72 #include "jvmci/jvmciJavaClasses.hpp" 73 #include "runtime/vframe.hpp" 74 #endif 75 #ifdef COMPILER2 76 #include "opto/c2compiler.hpp" 77 #endif 78 79 #ifdef DTRACE_ENABLED 80 81 // Only bother with this argument setup if dtrace is available 82 83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 84 { \ 85 Symbol* klass_name = (method)->klass_name(); \ 86 Symbol* name = (method)->name(); \ 87 Symbol* signature = (method)->signature(); \ 88 HOTSPOT_METHOD_COMPILE_BEGIN( \ 89 (char *) comp_name, strlen(comp_name), \ 90 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 91 (char *) name->bytes(), name->utf8_length(), \ 92 (char *) signature->bytes(), signature->utf8_length()); \ 93 } 94 95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 96 { \ 97 Symbol* klass_name = (method)->klass_name(); \ 98 Symbol* name = (method)->name(); \ 99 Symbol* signature = (method)->signature(); \ 100 HOTSPOT_METHOD_COMPILE_END( \ 101 (char *) comp_name, strlen(comp_name), \ 102 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 103 (char *) name->bytes(), name->utf8_length(), \ 104 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 105 } 106 107 #else // ndef DTRACE_ENABLED 108 109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 111 112 #endif // ndef DTRACE_ENABLED 113 114 bool CompileBroker::_initialized = false; 115 volatile bool CompileBroker::_should_block = false; 116 volatile int CompileBroker::_print_compilation_warning = 0; 117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 118 119 // The installed compiler(s) 120 AbstractCompiler* CompileBroker::_compilers[2]; 121 122 // The maximum numbers of compiler threads to be determined during startup. 123 int CompileBroker::_c1_count = 0; 124 int CompileBroker::_c2_count = 0; 125 126 // An array of compiler names as Java String objects 127 jobject* CompileBroker::_compiler1_objects = NULL; 128 jobject* CompileBroker::_compiler2_objects = NULL; 129 130 CompileLog** CompileBroker::_compiler1_logs = NULL; 131 CompileLog** CompileBroker::_compiler2_logs = NULL; 132 133 // These counters are used to assign an unique ID to each compilation. 134 volatile jint CompileBroker::_compilation_id = 0; 135 volatile jint CompileBroker::_osr_compilation_id = 0; 136 137 // Debugging information 138 int CompileBroker::_last_compile_type = no_compile; 139 int CompileBroker::_last_compile_level = CompLevel_none; 140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 141 142 // Performance counters 143 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 146 147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 152 153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 157 158 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 165 166 // Timers and counters for generating statistics 167 elapsedTimer CompileBroker::_t_total_compilation; 168 elapsedTimer CompileBroker::_t_osr_compilation; 169 elapsedTimer CompileBroker::_t_standard_compilation; 170 elapsedTimer CompileBroker::_t_invalidated_compilation; 171 elapsedTimer CompileBroker::_t_bailedout_compilation; 172 173 int CompileBroker::_total_bailout_count = 0; 174 int CompileBroker::_total_invalidated_count = 0; 175 int CompileBroker::_total_compile_count = 0; 176 int CompileBroker::_total_osr_compile_count = 0; 177 int CompileBroker::_total_standard_compile_count = 0; 178 int CompileBroker::_total_compiler_stopped_count = 0; 179 int CompileBroker::_total_compiler_restarted_count = 0; 180 181 int CompileBroker::_sum_osr_bytes_compiled = 0; 182 int CompileBroker::_sum_standard_bytes_compiled = 0; 183 int CompileBroker::_sum_nmethod_size = 0; 184 int CompileBroker::_sum_nmethod_code_size = 0; 185 186 long CompileBroker::_peak_compilation_time = 0; 187 188 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 189 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 190 191 192 193 class CompilationLog : public StringEventLog { 194 public: 195 CompilationLog() : StringEventLog("Compilation events") { 196 } 197 198 void log_compile(JavaThread* thread, CompileTask* task) { 199 StringLogMessage lm; 200 stringStream sstr = lm.stream(); 201 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 202 task->print(&sstr, NULL, true, false); 203 log(thread, "%s", (const char*)lm); 204 } 205 206 void log_nmethod(JavaThread* thread, nmethod* nm) { 207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 208 nm->compile_id(), nm->is_osr_method() ? "%" : "", 209 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 210 } 211 212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 213 StringLogMessage lm; 214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 215 if (retry_message != NULL) { 216 lm.append(" (%s)", retry_message); 217 } 218 lm.print("\n"); 219 log(thread, "%s", (const char*)lm); 220 } 221 222 void log_metaspace_failure(const char* reason) { 223 ResourceMark rm; 224 StringLogMessage lm; 225 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 226 lm.print("\n"); 227 log(JavaThread::current(), "%s", (const char*)lm); 228 } 229 }; 230 231 static CompilationLog* _compilation_log = NULL; 232 233 bool compileBroker_init() { 234 if (LogEvents) { 235 _compilation_log = new CompilationLog(); 236 } 237 238 // init directives stack, adding default directive 239 DirectivesStack::init(); 240 241 if (DirectivesParser::has_file()) { 242 return DirectivesParser::parse_from_flag(); 243 } else if (CompilerDirectivesPrint) { 244 // Print default directive even when no other was added 245 DirectivesStack::print(tty); 246 } 247 248 return true; 249 } 250 251 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 252 CompilerThread* thread = CompilerThread::current(); 253 thread->set_task(task); 254 #if INCLUDE_JVMCI 255 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 256 task->set_jvmci_compiler_thread(thread); 257 } 258 #endif 259 CompileLog* log = thread->log(); 260 if (log != NULL) task->log_task_start(log); 261 } 262 263 CompileTaskWrapper::~CompileTaskWrapper() { 264 CompilerThread* thread = CompilerThread::current(); 265 CompileTask* task = thread->task(); 266 CompileLog* log = thread->log(); 267 if (log != NULL) task->log_task_done(log); 268 thread->set_task(NULL); 269 task->set_code_handle(NULL); 270 thread->set_env(NULL); 271 if (task->is_blocking()) { 272 bool free_task = false; 273 { 274 MutexLocker notifier(task->lock(), thread); 275 task->mark_complete(); 276 #if INCLUDE_JVMCI 277 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 278 if (!task->has_waiter()) { 279 // The waiting thread timed out and thus did not free the task. 280 free_task = true; 281 } 282 task->set_jvmci_compiler_thread(NULL); 283 } 284 #endif 285 if (!free_task) { 286 // Notify the waiting thread that the compilation has completed 287 // so that it can free the task. 288 task->lock()->notify_all(); 289 } 290 } 291 if (free_task) { 292 // The task can only be freed once the task lock is released. 293 CompileTask::free(task); 294 } 295 } else { 296 task->mark_complete(); 297 298 // By convention, the compiling thread is responsible for 299 // recycling a non-blocking CompileTask. 300 CompileTask::free(task); 301 } 302 } 303 304 /** 305 * Check if a CompilerThread can be removed and update count if requested. 306 */ 307 static bool can_remove(CompilerThread *ct, bool do_it) { 308 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 309 if (!ReduceNumberOfCompilerThreads) return false; 310 311 AbstractCompiler *compiler = ct->compiler(); 312 int compiler_count = compiler->num_compiler_threads(); 313 bool c1 = compiler->is_c1(); 314 315 // Keep at least 1 compiler thread of each type. 316 if (compiler_count < 2) return false; 317 318 // Keep thread alive for at least some time. 319 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 320 321 // We only allow the last compiler thread of each type to get removed. 322 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1) 323 : CompileBroker::compiler2_object(compiler_count - 1); 324 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) { 325 if (do_it) { 326 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 327 compiler->set_num_compiler_threads(compiler_count - 1); 328 } 329 return true; 330 } 331 return false; 332 } 333 334 /** 335 * Add a CompileTask to a CompileQueue. 336 */ 337 void CompileQueue::add(CompileTask* task) { 338 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 339 340 task->set_next(NULL); 341 task->set_prev(NULL); 342 343 if (_last == NULL) { 344 // The compile queue is empty. 345 assert(_first == NULL, "queue is empty"); 346 _first = task; 347 _last = task; 348 } else { 349 // Append the task to the queue. 350 assert(_last->next() == NULL, "not last"); 351 _last->set_next(task); 352 task->set_prev(_last); 353 _last = task; 354 } 355 ++_size; 356 357 // Mark the method as being in the compile queue. 358 task->method()->set_queued_for_compilation(); 359 360 if (CIPrintCompileQueue) { 361 print_tty(); 362 } 363 364 if (LogCompilation && xtty != NULL) { 365 task->log_task_queued(); 366 } 367 368 // Notify CompilerThreads that a task is available. 369 MethodCompileQueue_lock->notify_all(); 370 } 371 372 /** 373 * Empties compilation queue by putting all compilation tasks onto 374 * a freelist. Furthermore, the method wakes up all threads that are 375 * waiting on a compilation task to finish. This can happen if background 376 * compilation is disabled. 377 */ 378 void CompileQueue::free_all() { 379 MutexLocker mu(MethodCompileQueue_lock); 380 CompileTask* next = _first; 381 382 // Iterate over all tasks in the compile queue 383 while (next != NULL) { 384 CompileTask* current = next; 385 next = current->next(); 386 { 387 // Wake up thread that blocks on the compile task. 388 MutexLocker ct_lock(current->lock()); 389 current->lock()->notify(); 390 } 391 // Put the task back on the freelist. 392 CompileTask::free(current); 393 } 394 _first = NULL; 395 396 // Wake up all threads that block on the queue. 397 MethodCompileQueue_lock->notify_all(); 398 } 399 400 /** 401 * Get the next CompileTask from a CompileQueue 402 */ 403 CompileTask* CompileQueue::get() { 404 // save methods from RedefineClasses across safepoint 405 // across MethodCompileQueue_lock below. 406 methodHandle save_method; 407 methodHandle save_hot_method; 408 409 MutexLocker locker(MethodCompileQueue_lock); 410 // If _first is NULL we have no more compile jobs. There are two reasons for 411 // having no compile jobs: First, we compiled everything we wanted. Second, 412 // we ran out of code cache so compilation has been disabled. In the latter 413 // case we perform code cache sweeps to free memory such that we can re-enable 414 // compilation. 415 while (_first == NULL) { 416 // Exit loop if compilation is disabled forever 417 if (CompileBroker::is_compilation_disabled_forever()) { 418 return NULL; 419 } 420 421 // If there are no compilation tasks and we can compile new jobs 422 // (i.e., there is enough free space in the code cache) there is 423 // no need to invoke the sweeper. As a result, the hotness of methods 424 // remains unchanged. This behavior is desired, since we want to keep 425 // the stable state, i.e., we do not want to evict methods from the 426 // code cache if it is unnecessary. 427 // We need a timed wait here, since compiler threads can exit if compilation 428 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 429 // is not critical and we do not want idle compiler threads to wake up too often. 430 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 431 432 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 433 // Still nothing to compile. Give caller a chance to stop this thread. 434 if (can_remove(CompilerThread::current(), false)) return NULL; 435 } 436 } 437 438 if (CompileBroker::is_compilation_disabled_forever()) { 439 return NULL; 440 } 441 442 CompileTask* task; 443 { 444 NoSafepointVerifier nsv; 445 task = CompilationPolicy::policy()->select_task(this); 446 } 447 448 if (task != NULL) { 449 // Save method pointers across unlock safepoint. The task is removed from 450 // the compilation queue, which is walked during RedefineClasses. 451 save_method = methodHandle(task->method()); 452 save_hot_method = methodHandle(task->hot_method()); 453 454 remove(task); 455 purge_stale_tasks(); // may temporarily release MCQ lock 456 } 457 458 return task; 459 } 460 461 // Clean & deallocate stale compile tasks. 462 // Temporarily releases MethodCompileQueue lock. 463 void CompileQueue::purge_stale_tasks() { 464 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 465 if (_first_stale != NULL) { 466 // Stale tasks are purged when MCQ lock is released, 467 // but _first_stale updates are protected by MCQ lock. 468 // Once task processing starts and MCQ lock is released, 469 // other compiler threads can reuse _first_stale. 470 CompileTask* head = _first_stale; 471 _first_stale = NULL; 472 { 473 MutexUnlocker ul(MethodCompileQueue_lock); 474 for (CompileTask* task = head; task != NULL; ) { 475 CompileTask* next_task = task->next(); 476 CompileTaskWrapper ctw(task); // Frees the task 477 task->set_failure_reason("stale task"); 478 task = next_task; 479 } 480 } 481 } 482 } 483 484 void CompileQueue::remove(CompileTask* task) { 485 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 486 if (task->prev() != NULL) { 487 task->prev()->set_next(task->next()); 488 } else { 489 // max is the first element 490 assert(task == _first, "Sanity"); 491 _first = task->next(); 492 } 493 494 if (task->next() != NULL) { 495 task->next()->set_prev(task->prev()); 496 } else { 497 // max is the last element 498 assert(task == _last, "Sanity"); 499 _last = task->prev(); 500 } 501 --_size; 502 } 503 504 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 505 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 506 remove(task); 507 508 // Enqueue the task for reclamation (should be done outside MCQ lock) 509 task->set_next(_first_stale); 510 task->set_prev(NULL); 511 _first_stale = task; 512 } 513 514 // methods in the compile queue need to be marked as used on the stack 515 // so that they don't get reclaimed by Redefine Classes 516 void CompileQueue::mark_on_stack() { 517 CompileTask* task = _first; 518 while (task != NULL) { 519 task->mark_on_stack(); 520 task = task->next(); 521 } 522 } 523 524 525 CompileQueue* CompileBroker::compile_queue(int comp_level) { 526 if (is_c2_compile(comp_level)) return _c2_compile_queue; 527 if (is_c1_compile(comp_level)) return _c1_compile_queue; 528 return NULL; 529 } 530 531 void CompileBroker::print_compile_queues(outputStream* st) { 532 st->print_cr("Current compiles: "); 533 534 char buf[2000]; 535 int buflen = sizeof(buf); 536 Threads::print_threads_compiling(st, buf, buflen); 537 538 st->cr(); 539 if (_c1_compile_queue != NULL) { 540 _c1_compile_queue->print(st); 541 } 542 if (_c2_compile_queue != NULL) { 543 _c2_compile_queue->print(st); 544 } 545 } 546 547 void CompileQueue::print(outputStream* st) { 548 assert_locked_or_safepoint(MethodCompileQueue_lock); 549 st->print_cr("%s:", name()); 550 CompileTask* task = _first; 551 if (task == NULL) { 552 st->print_cr("Empty"); 553 } else { 554 while (task != NULL) { 555 task->print(st, NULL, true, true); 556 task = task->next(); 557 } 558 } 559 st->cr(); 560 } 561 562 void CompileQueue::print_tty() { 563 ttyLocker ttyl; 564 print(tty); 565 } 566 567 CompilerCounters::CompilerCounters() { 568 _current_method[0] = '\0'; 569 _compile_type = CompileBroker::no_compile; 570 } 571 572 // ------------------------------------------------------------------ 573 // CompileBroker::compilation_init 574 // 575 // Initialize the Compilation object 576 void CompileBroker::compilation_init_phase1(TRAPS) { 577 _last_method_compiled[0] = '\0'; 578 579 // No need to initialize compilation system if we do not use it. 580 if (!UseCompiler) { 581 return; 582 } 583 // Set the interface to the current compiler(s). 584 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 585 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 586 587 #if INCLUDE_JVMCI 588 if (EnableJVMCI) { 589 // This is creating a JVMCICompiler singleton. 590 JVMCICompiler* jvmci = new JVMCICompiler(); 591 592 if (UseJVMCICompiler) { 593 _compilers[1] = jvmci; 594 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 595 if (BootstrapJVMCI) { 596 // JVMCI will bootstrap so give it more threads 597 _c2_count = MIN2(32, os::active_processor_count()); 598 } 599 } else { 600 _c2_count = JVMCIThreads; 601 } 602 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 603 } else { 604 _c1_count = JVMCIHostThreads; 605 } 606 } 607 } 608 #endif // INCLUDE_JVMCI 609 610 #ifdef COMPILER1 611 if (_c1_count > 0) { 612 _compilers[0] = new Compiler(); 613 } 614 #endif // COMPILER1 615 616 #ifdef COMPILER2 617 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 618 if (_c2_count > 0) { 619 _compilers[1] = new C2Compiler(); 620 } 621 } 622 #endif // COMPILER2 623 624 // Start the compiler thread(s) and the sweeper thread 625 init_compiler_sweeper_threads(); 626 // totalTime performance counter is always created as it is required 627 // by the implementation of java.lang.management.CompilationMBean. 628 { 629 EXCEPTION_MARK; 630 _perf_total_compilation = 631 PerfDataManager::create_counter(JAVA_CI, "totalTime", 632 PerfData::U_Ticks, CHECK); 633 } 634 635 if (UsePerfData) { 636 637 EXCEPTION_MARK; 638 639 // create the jvmstat performance counters 640 _perf_osr_compilation = 641 PerfDataManager::create_counter(SUN_CI, "osrTime", 642 PerfData::U_Ticks, CHECK); 643 644 _perf_standard_compilation = 645 PerfDataManager::create_counter(SUN_CI, "standardTime", 646 PerfData::U_Ticks, CHECK); 647 648 _perf_total_bailout_count = 649 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 650 PerfData::U_Events, CHECK); 651 652 _perf_total_invalidated_count = 653 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 654 PerfData::U_Events, CHECK); 655 656 _perf_total_compile_count = 657 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 658 PerfData::U_Events, CHECK); 659 _perf_total_osr_compile_count = 660 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 661 PerfData::U_Events, CHECK); 662 663 _perf_total_standard_compile_count = 664 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 665 PerfData::U_Events, CHECK); 666 667 _perf_sum_osr_bytes_compiled = 668 PerfDataManager::create_counter(SUN_CI, "osrBytes", 669 PerfData::U_Bytes, CHECK); 670 671 _perf_sum_standard_bytes_compiled = 672 PerfDataManager::create_counter(SUN_CI, "standardBytes", 673 PerfData::U_Bytes, CHECK); 674 675 _perf_sum_nmethod_size = 676 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 677 PerfData::U_Bytes, CHECK); 678 679 _perf_sum_nmethod_code_size = 680 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 681 PerfData::U_Bytes, CHECK); 682 683 _perf_last_method = 684 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 685 CompilerCounters::cmname_buffer_length, 686 "", CHECK); 687 688 _perf_last_failed_method = 689 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 690 CompilerCounters::cmname_buffer_length, 691 "", CHECK); 692 693 _perf_last_invalidated_method = 694 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 695 CompilerCounters::cmname_buffer_length, 696 "", CHECK); 697 698 _perf_last_compile_type = 699 PerfDataManager::create_variable(SUN_CI, "lastType", 700 PerfData::U_None, 701 (jlong)CompileBroker::no_compile, 702 CHECK); 703 704 _perf_last_compile_size = 705 PerfDataManager::create_variable(SUN_CI, "lastSize", 706 PerfData::U_Bytes, 707 (jlong)CompileBroker::no_compile, 708 CHECK); 709 710 711 _perf_last_failed_type = 712 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 713 PerfData::U_None, 714 (jlong)CompileBroker::no_compile, 715 CHECK); 716 717 _perf_last_invalidated_type = 718 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 719 PerfData::U_None, 720 (jlong)CompileBroker::no_compile, 721 CHECK); 722 } 723 } 724 725 // Completes compiler initialization. Compilation requests submitted 726 // prior to this will be silently ignored. 727 void CompileBroker::compilation_init_phase2() { 728 _initialized = true; 729 } 730 731 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) { 732 Handle string = java_lang_String::create_from_str(name, CHECK_NH); 733 Handle thread_group(THREAD, Universe::system_thread_group()); 734 return JavaCalls::construct_new_instance( 735 SystemDictionary::Thread_klass(), 736 vmSymbols::threadgroup_string_void_signature(), 737 thread_group, 738 string, 739 CHECK_NH); 740 } 741 742 743 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, 744 AbstractCompiler* comp, bool compiler_thread, TRAPS) { 745 JavaThread* thread = NULL; 746 { 747 MutexLocker mu(Threads_lock, THREAD); 748 if (compiler_thread) { 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 (compiler_thread) { 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->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 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD)); 848 _compiler2_objects[i] = thread_handle; 849 _compiler2_logs[i] = NULL; 850 851 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 852 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], /* compiler_thread */ true, CHECK); 853 assert(ct != NULL, "should have been handled for initial thread"); 854 _compilers[1]->set_num_compiler_threads(i + 1); 855 if (TraceCompilerThreads) { 856 ResourceMark rm; 857 MutexLocker mu(Threads_lock); 858 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 859 } 860 } 861 } 862 863 for (int i = 0; i < _c1_count; i++) { 864 // Create a name for our thread. 865 sprintf(name_buffer, "C1 CompilerThread%d", i); 866 jobject thread_handle = JNIHandles::make_global(create_thread_oop(name_buffer, THREAD)); 867 _compiler1_objects[i] = thread_handle; 868 _compiler1_logs[i] = NULL; 869 870 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 871 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], /* compiler_thread */ true, CHECK); 872 assert(ct != NULL, "should have been handled for initial thread"); 873 _compilers[0]->set_num_compiler_threads(i + 1); 874 if (TraceCompilerThreads) { 875 ResourceMark rm; 876 MutexLocker mu(Threads_lock); 877 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 878 } 879 } 880 } 881 882 if (UsePerfData) { 883 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 884 } 885 886 if (MethodFlushing) { 887 // Initialize the sweeper thread 888 jobject thread_handle = JNIHandles::make_local(THREAD, create_thread_oop("Sweeper thread", THREAD)()); 889 make_thread(thread_handle, NULL, NULL, /* compiler_thread */ false, CHECK); 890 } 891 } 892 893 void CompileBroker::possibly_add_compiler_threads() { 894 EXCEPTION_MARK; 895 896 julong available_memory = os::available_memory(); 897 // Only do attempt to start additional threads if the lock is free. 898 if (!CompileThread_lock->try_lock()) return; 899 900 if (_c2_compile_queue != NULL) { 901 int old_c2_count = _compilers[1]->num_compiler_threads(); 902 int new_c2_count = MIN3(_c2_count, 903 _c2_compile_queue->size() / 2, 904 (int)(available_memory / 200*M)); 905 906 for (int i = old_c2_count; i < new_c2_count; i++) { 907 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], true, CHECK); 908 if (ct == NULL) break; 909 _compilers[1]->set_num_compiler_threads(i + 1); 910 if (TraceCompilerThreads) { 911 ResourceMark rm; 912 MutexLocker mu(Threads_lock); 913 tty->print_cr("Added compiler thread %s (available memory: %dMB)", 914 ct->get_thread_name(), (int)(available_memory/M)); 915 } 916 } 917 } 918 919 if (_c1_compile_queue != NULL) { 920 int old_c1_count = _compilers[0]->num_compiler_threads(); 921 int new_c1_count = MIN3(_c1_count, 922 _c1_compile_queue->size() / 4, 923 (int)(available_memory / 100*M)); 924 925 for (int i = old_c1_count; i < new_c1_count; i++) { 926 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], true, CHECK); 927 if (ct == NULL) break; 928 _compilers[0]->set_num_compiler_threads(i + 1); 929 if (TraceCompilerThreads) { 930 ResourceMark rm; 931 MutexLocker mu(Threads_lock); 932 tty->print_cr("Added compiler thread %s (available memory: %dMB)", 933 ct->get_thread_name(), (int)(available_memory/M)); 934 } 935 } 936 } 937 938 CompileThread_lock->unlock(); 939 } 940 941 942 /** 943 * Set the methods on the stack as on_stack so that redefine classes doesn't 944 * reclaim them. This method is executed at a safepoint. 945 */ 946 void CompileBroker::mark_on_stack() { 947 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 948 // Since we are at a safepoint, we do not need a lock to access 949 // the compile queues. 950 if (_c2_compile_queue != NULL) { 951 _c2_compile_queue->mark_on_stack(); 952 } 953 if (_c1_compile_queue != NULL) { 954 _c1_compile_queue->mark_on_stack(); 955 } 956 } 957 958 // ------------------------------------------------------------------ 959 // CompileBroker::compile_method 960 // 961 // Request compilation of a method. 962 void CompileBroker::compile_method_base(const methodHandle& method, 963 int osr_bci, 964 int comp_level, 965 const methodHandle& hot_method, 966 int hot_count, 967 CompileTask::CompileReason compile_reason, 968 bool blocking, 969 Thread* thread) { 970 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 971 assert(method->method_holder()->is_instance_klass(), 972 "sanity check"); 973 assert(!method->method_holder()->is_not_initialized(), 974 "method holder must be initialized"); 975 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 976 977 if (CIPrintRequests) { 978 tty->print("request: "); 979 method->print_short_name(tty); 980 if (osr_bci != InvocationEntryBci) { 981 tty->print(" osr_bci: %d", osr_bci); 982 } 983 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 984 if (!hot_method.is_null()) { 985 tty->print(" hot: "); 986 if (hot_method() != method()) { 987 hot_method->print_short_name(tty); 988 } else { 989 tty->print("yes"); 990 } 991 } 992 tty->cr(); 993 } 994 995 // A request has been made for compilation. Before we do any 996 // real work, check to see if the method has been compiled 997 // in the meantime with a definitive result. 998 if (compilation_is_complete(method, osr_bci, comp_level)) { 999 return; 1000 } 1001 1002 #ifndef PRODUCT 1003 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1004 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1005 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1006 return; 1007 } 1008 } 1009 #endif 1010 1011 // If this method is already in the compile queue, then 1012 // we do not block the current thread. 1013 if (compilation_is_in_queue(method)) { 1014 // We may want to decay our counter a bit here to prevent 1015 // multiple denied requests for compilation. This is an 1016 // open compilation policy issue. Note: The other possibility, 1017 // in the case that this is a blocking compile request, is to have 1018 // all subsequent blocking requesters wait for completion of 1019 // ongoing compiles. Note that in this case we'll need a protocol 1020 // for freeing the associated compile tasks. [Or we could have 1021 // a single static monitor on which all these waiters sleep.] 1022 return; 1023 } 1024 1025 if (TieredCompilation) { 1026 // Tiered policy requires MethodCounters to exist before adding a method to 1027 // the queue. Create if we don't have them yet. 1028 method->get_method_counters(thread); 1029 } 1030 1031 // Outputs from the following MutexLocker block: 1032 CompileTask* task = NULL; 1033 CompileQueue* queue = compile_queue(comp_level); 1034 1035 // Acquire our lock. 1036 { 1037 MutexLocker locker(MethodCompileQueue_lock, thread); 1038 1039 // Make sure the method has not slipped into the queues since 1040 // last we checked; note that those checks were "fast bail-outs". 1041 // Here we need to be more careful, see 14012000 below. 1042 if (compilation_is_in_queue(method)) { 1043 return; 1044 } 1045 1046 // We need to check again to see if the compilation has 1047 // completed. A previous compilation may have registered 1048 // some result. 1049 if (compilation_is_complete(method, osr_bci, comp_level)) { 1050 return; 1051 } 1052 1053 // We now know that this compilation is not pending, complete, 1054 // or prohibited. Assign a compile_id to this compilation 1055 // and check to see if it is in our [Start..Stop) range. 1056 int compile_id = assign_compile_id(method, osr_bci); 1057 if (compile_id == 0) { 1058 // The compilation falls outside the allowed range. 1059 return; 1060 } 1061 1062 #if INCLUDE_JVMCI 1063 if (UseJVMCICompiler) { 1064 if (blocking) { 1065 // Don't allow blocking compiles for requests triggered by JVMCI. 1066 if (thread->is_Compiler_thread()) { 1067 blocking = false; 1068 } 1069 1070 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1071 vframeStream vfst((JavaThread*) thread); 1072 for (; !vfst.at_end(); vfst.next()) { 1073 if (vfst.method()->is_static_initializer() || 1074 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1075 vfst.method()->name() == vmSymbols::loadClass_name())) { 1076 blocking = false; 1077 break; 1078 } 1079 } 1080 1081 // Don't allow blocking compilation requests to JVMCI 1082 // if JVMCI itself is not yet initialized 1083 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 1084 blocking = false; 1085 } 1086 1087 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1088 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1089 // such as the DestroyJavaVM thread. 1090 if (JVMCIRuntime::shutdown_called()) { 1091 blocking = false; 1092 } 1093 } 1094 } 1095 #endif // INCLUDE_JVMCI 1096 1097 // We will enter the compilation in the queue. 1098 // 14012000: Note that this sets the queued_for_compile bits in 1099 // the target method. We can now reason that a method cannot be 1100 // queued for compilation more than once, as follows: 1101 // Before a thread queues a task for compilation, it first acquires 1102 // the compile queue lock, then checks if the method's queued bits 1103 // are set or it has already been compiled. Thus there can not be two 1104 // instances of a compilation task for the same method on the 1105 // compilation queue. Consider now the case where the compilation 1106 // thread has already removed a task for that method from the queue 1107 // and is in the midst of compiling it. In this case, the 1108 // queued_for_compile bits must be set in the method (and these 1109 // will be visible to the current thread, since the bits were set 1110 // under protection of the compile queue lock, which we hold now. 1111 // When the compilation completes, the compiler thread first sets 1112 // the compilation result and then clears the queued_for_compile 1113 // bits. Neither of these actions are protected by a barrier (or done 1114 // under the protection of a lock), so the only guarantee we have 1115 // (on machines with TSO (Total Store Order)) is that these values 1116 // will update in that order. As a result, the only combinations of 1117 // these bits that the current thread will see are, in temporal order: 1118 // <RESULT, QUEUE> : 1119 // <0, 1> : in compile queue, but not yet compiled 1120 // <1, 1> : compiled but queue bit not cleared 1121 // <1, 0> : compiled and queue bit cleared 1122 // Because we first check the queue bits then check the result bits, 1123 // we are assured that we cannot introduce a duplicate task. 1124 // Note that if we did the tests in the reverse order (i.e. check 1125 // result then check queued bit), we could get the result bit before 1126 // the compilation completed, and the queue bit after the compilation 1127 // completed, and end up introducing a "duplicate" (redundant) task. 1128 // In that case, the compiler thread should first check if a method 1129 // has already been compiled before trying to compile it. 1130 // NOTE: in the event that there are multiple compiler threads and 1131 // there is de-optimization/recompilation, things will get hairy, 1132 // and in that case it's best to protect both the testing (here) of 1133 // these bits, and their updating (here and elsewhere) under a 1134 // common lock. 1135 task = create_compile_task(queue, 1136 compile_id, method, 1137 osr_bci, comp_level, 1138 hot_method, hot_count, compile_reason, 1139 blocking); 1140 } 1141 1142 if (blocking) { 1143 wait_for_completion(task); 1144 } 1145 } 1146 1147 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1148 int comp_level, 1149 const methodHandle& hot_method, int hot_count, 1150 CompileTask::CompileReason compile_reason, 1151 Thread* THREAD) { 1152 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1153 if (!_initialized || comp_level == CompLevel_none) { 1154 return NULL; 1155 } 1156 1157 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1158 assert(comp != NULL, "Ensure we have a compiler"); 1159 1160 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1161 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1162 DirectivesStack::release(directive); 1163 return nm; 1164 } 1165 1166 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1167 int comp_level, 1168 const methodHandle& hot_method, int hot_count, 1169 CompileTask::CompileReason compile_reason, 1170 DirectiveSet* directive, 1171 Thread* THREAD) { 1172 1173 // make sure arguments make sense 1174 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1175 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1176 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1177 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1178 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1179 // allow any levels for WhiteBox 1180 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1181 // return quickly if possible 1182 1183 // lock, make sure that the compilation 1184 // isn't prohibited in a straightforward way. 1185 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1186 if (comp == NULL || !comp->can_compile_method(method) || 1187 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1188 return NULL; 1189 } 1190 1191 #if INCLUDE_JVMCI 1192 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { 1193 return NULL; 1194 } 1195 #endif 1196 1197 if (osr_bci == InvocationEntryBci) { 1198 // standard compilation 1199 CompiledMethod* method_code = method->code(); 1200 if (method_code != NULL && method_code->is_nmethod()) { 1201 if (compilation_is_complete(method, osr_bci, comp_level)) { 1202 return (nmethod*) method_code; 1203 } 1204 } 1205 if (method->is_not_compilable(comp_level)) { 1206 return NULL; 1207 } 1208 } else { 1209 // osr compilation 1210 #ifndef TIERED 1211 // seems like an assert of dubious value 1212 assert(comp_level == CompLevel_highest_tier, 1213 "all OSR compiles are assumed to be at a single compilation level"); 1214 #endif // TIERED 1215 // We accept a higher level osr method 1216 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1217 if (nm != NULL) return nm; 1218 if (method->is_not_osr_compilable(comp_level)) return NULL; 1219 } 1220 1221 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1222 // some prerequisites that are compiler specific 1223 if (comp->is_c2()) { 1224 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1225 // Resolve all classes seen in the signature of the method 1226 // we are compiling. 1227 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1228 } 1229 1230 // If the method is native, do the lookup in the thread requesting 1231 // the compilation. Native lookups can load code, which is not 1232 // permitted during compilation. 1233 // 1234 // Note: A native method implies non-osr compilation which is 1235 // checked with an assertion at the entry of this method. 1236 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1237 bool in_base_library; 1238 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1239 if (HAS_PENDING_EXCEPTION) { 1240 // In case of an exception looking up the method, we just forget 1241 // about it. The interpreter will kick-in and throw the exception. 1242 method->set_not_compilable(); // implies is_not_osr_compilable() 1243 CLEAR_PENDING_EXCEPTION; 1244 return NULL; 1245 } 1246 assert(method->has_native_function(), "must have native code by now"); 1247 } 1248 1249 // RedefineClasses() has replaced this method; just return 1250 if (method->is_old()) { 1251 return NULL; 1252 } 1253 1254 // JVMTI -- post_compile_event requires jmethod_id() that may require 1255 // a lock the compiling thread can not acquire. Prefetch it here. 1256 if (JvmtiExport::should_post_compiled_method_load()) { 1257 method->jmethod_id(); 1258 } 1259 1260 // do the compilation 1261 if (method->is_native()) { 1262 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1263 // The following native methods: 1264 // 1265 // java.lang.Float.intBitsToFloat 1266 // java.lang.Float.floatToRawIntBits 1267 // java.lang.Double.longBitsToDouble 1268 // java.lang.Double.doubleToRawLongBits 1269 // 1270 // are called through the interpreter even if interpreter native stubs 1271 // are not preferred (i.e., calling through adapter handlers is preferred). 1272 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1273 // if the version of the methods from the native libraries is called. 1274 // As the interpreter and the C2-intrinsified version of the methods preserves 1275 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1276 if ((UseSSE >= 1 && 1277 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1278 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1279 (UseSSE >= 2 && 1280 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1281 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1282 return NULL; 1283 } 1284 1285 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1286 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1287 // 1288 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1289 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1290 AdapterHandlerLibrary::create_native_wrapper(method); 1291 } else { 1292 return NULL; 1293 } 1294 } else { 1295 // If the compiler is shut off due to code cache getting full 1296 // fail out now so blocking compiles dont hang the java thread 1297 if (!should_compile_new_jobs()) { 1298 CompilationPolicy::policy()->delay_compilation(method()); 1299 return NULL; 1300 } 1301 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; 1302 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1303 } 1304 1305 // return requested nmethod 1306 // We accept a higher level osr method 1307 if (osr_bci == InvocationEntryBci) { 1308 CompiledMethod* code = method->code(); 1309 if (code == NULL) { 1310 return (nmethod*) code; 1311 } else { 1312 return code->as_nmethod_or_null(); 1313 } 1314 } 1315 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1316 } 1317 1318 1319 // ------------------------------------------------------------------ 1320 // CompileBroker::compilation_is_complete 1321 // 1322 // See if compilation of this method is already complete. 1323 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1324 int osr_bci, 1325 int comp_level) { 1326 bool is_osr = (osr_bci != standard_entry_bci); 1327 if (is_osr) { 1328 if (method->is_not_osr_compilable(comp_level)) { 1329 return true; 1330 } else { 1331 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1332 return (result != NULL); 1333 } 1334 } else { 1335 if (method->is_not_compilable(comp_level)) { 1336 return true; 1337 } else { 1338 CompiledMethod* result = method->code(); 1339 if (result == NULL) return false; 1340 return comp_level == result->comp_level(); 1341 } 1342 } 1343 } 1344 1345 1346 /** 1347 * See if this compilation is already requested. 1348 * 1349 * Implementation note: there is only a single "is in queue" bit 1350 * for each method. This means that the check below is overly 1351 * conservative in the sense that an osr compilation in the queue 1352 * will block a normal compilation from entering the queue (and vice 1353 * versa). This can be remedied by a full queue search to disambiguate 1354 * cases. If it is deemed profitable, this may be done. 1355 */ 1356 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1357 return method->queued_for_compilation(); 1358 } 1359 1360 // ------------------------------------------------------------------ 1361 // CompileBroker::compilation_is_prohibited 1362 // 1363 // See if this compilation is not allowed. 1364 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1365 bool is_native = method->is_native(); 1366 // Some compilers may not support the compilation of natives. 1367 AbstractCompiler *comp = compiler(comp_level); 1368 if (is_native && 1369 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1370 method->set_not_compilable_quietly(comp_level); 1371 return true; 1372 } 1373 1374 bool is_osr = (osr_bci != standard_entry_bci); 1375 // Some compilers may not support on stack replacement. 1376 if (is_osr && 1377 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1378 method->set_not_osr_compilable(comp_level); 1379 return true; 1380 } 1381 1382 // The method may be explicitly excluded by the user. 1383 double scale; 1384 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1385 bool quietly = CompilerOracle::should_exclude_quietly(); 1386 if (PrintCompilation && !quietly) { 1387 // This does not happen quietly... 1388 ResourceMark rm; 1389 tty->print("### Excluding %s:%s", 1390 method->is_native() ? "generation of native wrapper" : "compile", 1391 (method->is_static() ? " static" : "")); 1392 method->print_short_name(tty); 1393 tty->cr(); 1394 } 1395 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1396 } 1397 1398 return false; 1399 } 1400 1401 /** 1402 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1403 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1404 * The function also allows to generate separate compilation IDs for OSR compilations. 1405 */ 1406 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1407 #ifdef ASSERT 1408 bool is_osr = (osr_bci != standard_entry_bci); 1409 int id; 1410 if (method->is_native()) { 1411 assert(!is_osr, "can't be osr"); 1412 // Adapters, native wrappers and method handle intrinsics 1413 // should be generated always. 1414 return Atomic::add(1, &_compilation_id); 1415 } else if (CICountOSR && is_osr) { 1416 id = Atomic::add(1, &_osr_compilation_id); 1417 if (CIStartOSR <= id && id < CIStopOSR) { 1418 return id; 1419 } 1420 } else { 1421 id = Atomic::add(1, &_compilation_id); 1422 if (CIStart <= id && id < CIStop) { 1423 return id; 1424 } 1425 } 1426 1427 // Method was not in the appropriate compilation range. 1428 method->set_not_compilable_quietly(); 1429 return 0; 1430 #else 1431 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1432 // only _compilation_id is incremented. 1433 return Atomic::add(1, &_compilation_id); 1434 #endif 1435 } 1436 1437 // ------------------------------------------------------------------ 1438 // CompileBroker::assign_compile_id_unlocked 1439 // 1440 // Public wrapper for assign_compile_id that acquires the needed locks 1441 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1442 MutexLocker locker(MethodCompileQueue_lock, thread); 1443 return assign_compile_id(method, osr_bci); 1444 } 1445 1446 // ------------------------------------------------------------------ 1447 // CompileBroker::preload_classes 1448 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1449 // Move this code over from c1_Compiler.cpp 1450 ShouldNotReachHere(); 1451 } 1452 1453 1454 // ------------------------------------------------------------------ 1455 // CompileBroker::create_compile_task 1456 // 1457 // Create a CompileTask object representing the current request for 1458 // compilation. Add this task to the queue. 1459 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1460 int compile_id, 1461 const methodHandle& method, 1462 int osr_bci, 1463 int comp_level, 1464 const methodHandle& hot_method, 1465 int hot_count, 1466 CompileTask::CompileReason compile_reason, 1467 bool blocking) { 1468 CompileTask* new_task = CompileTask::allocate(); 1469 new_task->initialize(compile_id, method, osr_bci, comp_level, 1470 hot_method, hot_count, compile_reason, 1471 blocking); 1472 queue->add(new_task); 1473 return new_task; 1474 } 1475 1476 #if INCLUDE_JVMCI 1477 // The number of milliseconds to wait before checking if 1478 // JVMCI compilation has made progress. 1479 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1480 1481 // The number of JVMCI compilation progress checks that must fail 1482 // before unblocking a thread waiting for a blocking compilation. 1483 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1484 1485 /** 1486 * Waits for a JVMCI compiler to complete a given task. This thread 1487 * waits until either the task completes or it sees no JVMCI compilation 1488 * progress for N consecutive milliseconds where N is 1489 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1490 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1491 * 1492 * @return true if this thread needs to free/recycle the task 1493 */ 1494 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1495 MutexLocker waiter(task->lock(), thread); 1496 int progress_wait_attempts = 0; 1497 int methods_compiled = jvmci->methods_compiled(); 1498 while (!task->is_complete() && !is_compilation_disabled_forever() && 1499 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1500 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1501 1502 bool progress; 1503 if (jvmci_compiler_thread != NULL) { 1504 // If the JVMCI compiler thread is not blocked, we deem it to be making progress. 1505 progress = jvmci_compiler_thread->thread_state() != _thread_blocked; 1506 } else { 1507 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1508 // that all JVMCI compiler threads are blocked on. We use the counter for 1509 // successful JVMCI compilations to determine whether JVMCI compilation 1510 // is still making progress through the JVMCI compiler queue. 1511 progress = jvmci->methods_compiled() != methods_compiled; 1512 } 1513 1514 if (!progress) { 1515 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1516 if (PrintCompilation) { 1517 task->print(tty, "wait for blocking compilation timed out"); 1518 } 1519 break; 1520 } 1521 } else { 1522 progress_wait_attempts = 0; 1523 if (jvmci_compiler_thread == NULL) { 1524 methods_compiled = jvmci->methods_compiled(); 1525 } 1526 } 1527 } 1528 task->clear_waiter(); 1529 return task->is_complete(); 1530 } 1531 #endif 1532 1533 /** 1534 * Wait for the compilation task to complete. 1535 */ 1536 void CompileBroker::wait_for_completion(CompileTask* task) { 1537 if (CIPrintCompileQueue) { 1538 ttyLocker ttyl; 1539 tty->print_cr("BLOCKING FOR COMPILE"); 1540 } 1541 1542 assert(task->is_blocking(), "can only wait on blocking task"); 1543 1544 JavaThread* thread = JavaThread::current(); 1545 thread->set_blocked_on_compilation(true); 1546 1547 methodHandle method(thread, task->method()); 1548 bool free_task; 1549 #if INCLUDE_JVMCI 1550 AbstractCompiler* comp = compiler(task->comp_level()); 1551 if (comp->is_jvmci()) { 1552 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1553 } else 1554 #endif 1555 { 1556 MutexLocker waiter(task->lock(), thread); 1557 free_task = true; 1558 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1559 task->lock()->wait(); 1560 } 1561 } 1562 1563 thread->set_blocked_on_compilation(false); 1564 if (free_task) { 1565 if (is_compilation_disabled_forever()) { 1566 CompileTask::free(task); 1567 return; 1568 } 1569 1570 // It is harmless to check this status without the lock, because 1571 // completion is a stable property (until the task object is recycled). 1572 assert(task->is_complete(), "Compilation should have completed"); 1573 assert(task->code_handle() == NULL, "must be reset"); 1574 1575 // By convention, the waiter is responsible for recycling a 1576 // blocking CompileTask. Since there is only one waiter ever 1577 // waiting on a CompileTask, we know that no one else will 1578 // be using this CompileTask; we can free it. 1579 CompileTask::free(task); 1580 } 1581 } 1582 1583 /** 1584 * Initialize compiler thread(s) + compiler object(s). The postcondition 1585 * of this function is that the compiler runtimes are initialized and that 1586 * compiler threads can start compiling. 1587 */ 1588 bool CompileBroker::init_compiler_runtime() { 1589 CompilerThread* thread = CompilerThread::current(); 1590 AbstractCompiler* comp = thread->compiler(); 1591 // Final sanity check - the compiler object must exist 1592 guarantee(comp != NULL, "Compiler object must exist"); 1593 1594 int system_dictionary_modification_counter; 1595 { 1596 MutexLocker locker(Compile_lock, thread); 1597 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1598 } 1599 1600 { 1601 // Must switch to native to allocate ci_env 1602 ThreadToNativeFromVM ttn(thread); 1603 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1604 // Cache Jvmti state 1605 ci_env.cache_jvmti_state(); 1606 // Cache DTrace flags 1607 ci_env.cache_dtrace_flags(); 1608 1609 // Switch back to VM state to do compiler initialization 1610 ThreadInVMfromNative tv(thread); 1611 ResetNoHandleMark rnhm; 1612 1613 // Perform per-thread and global initializations 1614 comp->initialize(); 1615 } 1616 1617 if (comp->is_failed()) { 1618 disable_compilation_forever(); 1619 // If compiler initialization failed, no compiler thread that is specific to a 1620 // particular compiler runtime will ever start to compile methods. 1621 shutdown_compiler_runtime(comp, thread); 1622 return false; 1623 } 1624 1625 // C1 specific check 1626 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1627 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1628 return false; 1629 } 1630 1631 return true; 1632 } 1633 1634 /** 1635 * If C1 and/or C2 initialization failed, we shut down all compilation. 1636 * We do this to keep things simple. This can be changed if it ever turns 1637 * out to be a problem. 1638 */ 1639 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1640 // Free buffer blob, if allocated 1641 if (thread->get_buffer_blob() != NULL) { 1642 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1643 CodeCache::free(thread->get_buffer_blob()); 1644 } 1645 1646 if (comp->should_perform_shutdown()) { 1647 // There are two reasons for shutting down the compiler 1648 // 1) compiler runtime initialization failed 1649 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1650 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1651 1652 // Only one thread per compiler runtime object enters here 1653 // Set state to shut down 1654 comp->set_shut_down(); 1655 1656 // Delete all queued compilation tasks to make compiler threads exit faster. 1657 if (_c1_compile_queue != NULL) { 1658 _c1_compile_queue->free_all(); 1659 } 1660 1661 if (_c2_compile_queue != NULL) { 1662 _c2_compile_queue->free_all(); 1663 } 1664 1665 // Set flags so that we continue execution with using interpreter only. 1666 UseCompiler = false; 1667 UseInterpreter = true; 1668 1669 // We could delete compiler runtimes also. However, there are references to 1670 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1671 // fail. This can be done later if necessary. 1672 } 1673 } 1674 1675 /** 1676 * Helper function to create new or reuse old CompileLog. 1677 */ 1678 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1679 if (!LogCompilation) return NULL; 1680 1681 AbstractCompiler *compiler = ct->compiler(); 1682 bool c1 = compiler->is_c1(); 1683 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1684 assert(compiler_objects != NULL, "must be initialized at this point"); 1685 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1686 assert(logs != NULL, "must be initialized at this point"); 1687 int count = c1 ? _c1_count : _c2_count; 1688 1689 // Find Compiler number by its threadObj. 1690 oop compiler_obj = ct->threadObj(); 1691 int compiler_number = 0; 1692 bool found = false; 1693 for (; compiler_number < count; compiler_number++) { 1694 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) { 1695 found = true; 1696 break; 1697 } 1698 } 1699 assert(found, "Compiler must exist at this point"); 1700 1701 // Determine pointer for this thread's log. 1702 CompileLog** log_ptr = &logs[compiler_number]; 1703 1704 // Return old one if it exists. 1705 CompileLog* log = *log_ptr; 1706 if (log != NULL) { 1707 ct->init_log(log); 1708 return log; 1709 } 1710 1711 // Create a new one and remember it. 1712 init_compiler_thread_log(); 1713 log = ct->log(); 1714 *log_ptr = log; 1715 return log; 1716 } 1717 1718 // ------------------------------------------------------------------ 1719 // CompileBroker::compiler_thread_loop 1720 // 1721 // The main loop run by a CompilerThread. 1722 void CompileBroker::compiler_thread_loop() { 1723 CompilerThread* thread = CompilerThread::current(); 1724 CompileQueue* queue = thread->queue(); 1725 // For the thread that initializes the ciObjectFactory 1726 // this resource mark holds all the shared objects 1727 ResourceMark rm; 1728 1729 // First thread to get here will initialize the compiler interface 1730 1731 { 1732 ASSERT_IN_VM; 1733 MutexLocker only_one (CompileThread_lock, thread); 1734 if (!ciObjectFactory::is_initialized()) { 1735 ciObjectFactory::initialize(); 1736 } 1737 } 1738 1739 // Open a log. 1740 CompileLog* log = get_log(thread); 1741 if (log != NULL) { 1742 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1743 thread->name(), 1744 os::current_thread_id(), 1745 os::current_process_id()); 1746 log->stamp(); 1747 log->end_elem(); 1748 } 1749 1750 // If compiler thread/runtime initialization fails, exit the compiler thread 1751 if (!init_compiler_runtime()) { 1752 return; 1753 } 1754 1755 thread->start_idle_timer(); 1756 1757 // Poll for new compilation tasks as long as the JVM runs. Compilation 1758 // should only be disabled if something went wrong while initializing the 1759 // compiler runtimes. This, in turn, should not happen. The only known case 1760 // when compiler runtime initialization fails is if there is not enough free 1761 // space in the code cache to generate the necessary stubs, etc. 1762 while (!is_compilation_disabled_forever()) { 1763 // We need this HandleMark to avoid leaking VM handles. 1764 HandleMark hm(thread); 1765 1766 CompileTask* task = queue->get(); 1767 if (task == NULL) { 1768 if (UseDynamicNumberOfCompilerThreads) { 1769 // Access compiler_count under lock to enforce consistency. 1770 MutexLocker only_one(CompileThread_lock); 1771 if (can_remove(thread, true)) { 1772 if (TraceCompilerThreads) { 1773 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1774 thread->name(), thread->idle_time_millis()); 1775 } 1776 // Free buffer blob, if allocated 1777 if (thread->get_buffer_blob() != NULL) { 1778 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1779 CodeCache::free(thread->get_buffer_blob()); 1780 } 1781 return; // Stop this thread. 1782 } 1783 } 1784 } else { 1785 // Assign the task to the current thread. Mark this compilation 1786 // thread as active for the profiler. 1787 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition 1788 // occurs after fetching the compile task off the queue. 1789 CompileTaskWrapper ctw(task); 1790 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1791 task->set_code_handle(&result_handle); 1792 methodHandle method(thread, task->method()); 1793 1794 // Never compile a method if breakpoints are present in it 1795 if (method()->number_of_breakpoints() == 0) { 1796 // Compile the method. 1797 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1798 invoke_compiler_on_method(task); 1799 thread->start_idle_timer(); 1800 } else { 1801 // After compilation is disabled, remove remaining methods from queue 1802 method->clear_queued_for_compilation(); 1803 task->set_failure_reason("compilation is disabled"); 1804 } 1805 } 1806 1807 if (UseDynamicNumberOfCompilerThreads) { 1808 possibly_add_compiler_threads(); 1809 } 1810 } 1811 } 1812 1813 // Shut down compiler runtime 1814 shutdown_compiler_runtime(thread->compiler(), thread); 1815 } 1816 1817 // ------------------------------------------------------------------ 1818 // CompileBroker::init_compiler_thread_log 1819 // 1820 // Set up state required by +LogCompilation. 1821 void CompileBroker::init_compiler_thread_log() { 1822 CompilerThread* thread = CompilerThread::current(); 1823 char file_name[4*K]; 1824 FILE* fp = NULL; 1825 intx thread_id = os::current_thread_id(); 1826 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1827 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1828 if (dir == NULL) { 1829 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1830 thread_id, os::current_process_id()); 1831 } else { 1832 jio_snprintf(file_name, sizeof(file_name), 1833 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1834 os::file_separator(), thread_id, os::current_process_id()); 1835 } 1836 1837 fp = fopen(file_name, "wt"); 1838 if (fp != NULL) { 1839 if (LogCompilation && Verbose) { 1840 tty->print_cr("Opening compilation log %s", file_name); 1841 } 1842 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1843 if (log == NULL) { 1844 fclose(fp); 1845 return; 1846 } 1847 thread->init_log(log); 1848 1849 if (xtty != NULL) { 1850 ttyLocker ttyl; 1851 // Record any per thread log files 1852 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1853 } 1854 return; 1855 } 1856 } 1857 warning("Cannot open log file: %s", file_name); 1858 } 1859 1860 void CompileBroker::log_metaspace_failure() { 1861 const char* message = "some methods may not be compiled because metaspace " 1862 "is out of memory"; 1863 if (_compilation_log != NULL) { 1864 _compilation_log->log_metaspace_failure(message); 1865 } 1866 if (PrintCompilation) { 1867 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1868 } 1869 } 1870 1871 1872 // ------------------------------------------------------------------ 1873 // CompileBroker::set_should_block 1874 // 1875 // Set _should_block. 1876 // Call this from the VM, with Threads_lock held and a safepoint requested. 1877 void CompileBroker::set_should_block() { 1878 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1879 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1880 #ifndef PRODUCT 1881 if (PrintCompilation && (Verbose || WizardMode)) 1882 tty->print_cr("notifying compiler thread pool to block"); 1883 #endif 1884 _should_block = true; 1885 } 1886 1887 // ------------------------------------------------------------------ 1888 // CompileBroker::maybe_block 1889 // 1890 // Call this from the compiler at convenient points, to poll for _should_block. 1891 void CompileBroker::maybe_block() { 1892 if (_should_block) { 1893 #ifndef PRODUCT 1894 if (PrintCompilation && (Verbose || WizardMode)) 1895 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1896 #endif 1897 ThreadInVMfromNative tivfn(JavaThread::current()); 1898 } 1899 } 1900 1901 // wrapper for CodeCache::print_summary() 1902 static void codecache_print(bool detailed) 1903 { 1904 ResourceMark rm; 1905 stringStream s; 1906 // Dump code cache into a buffer before locking the tty, 1907 { 1908 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1909 CodeCache::print_summary(&s, detailed); 1910 } 1911 ttyLocker ttyl; 1912 tty->print("%s", s.as_string()); 1913 } 1914 1915 // wrapper for CodeCache::print_summary() using outputStream 1916 static void codecache_print(outputStream* out, bool detailed) { 1917 ResourceMark rm; 1918 stringStream s; 1919 1920 // Dump code cache into a buffer 1921 { 1922 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1923 CodeCache::print_summary(&s, detailed); 1924 } 1925 1926 char* remaining_log = s.as_string(); 1927 while (*remaining_log != '\0') { 1928 char* eol = strchr(remaining_log, '\n'); 1929 if (eol == NULL) { 1930 out->print_cr("%s", remaining_log); 1931 remaining_log = remaining_log + strlen(remaining_log); 1932 } else { 1933 *eol = '\0'; 1934 out->print_cr("%s", remaining_log); 1935 remaining_log = eol + 1; 1936 } 1937 } 1938 } 1939 1940 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env) { 1941 if (success) { 1942 task->mark_success(); 1943 if (ci_env != NULL) { 1944 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1945 } 1946 if (_compilation_log != NULL) { 1947 nmethod* code = task->code(); 1948 if (code != NULL) { 1949 _compilation_log->log_nmethod(thread, code); 1950 } 1951 } 1952 } 1953 // simulate crash during compilation 1954 assert(task->compile_id() != CICrashAt, "just as planned"); 1955 } 1956 1957 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 1958 assert(event != NULL, "invariant"); 1959 assert(event->should_commit(), "invariant"); 1960 event->set_method(task->method()); 1961 event->set_compileId(task->compile_id()); 1962 event->set_compileLevel(task->comp_level()); 1963 event->set_succeded(task->is_success()); 1964 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1965 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1966 event->set_inlinedBytes(task->num_inlined_bytecodes()); 1967 event->commit(); 1968 } 1969 1970 int DirectivesStack::_depth = 0; 1971 CompilerDirectives* DirectivesStack::_top = NULL; 1972 CompilerDirectives* DirectivesStack::_bottom = NULL; 1973 1974 // ------------------------------------------------------------------ 1975 // CompileBroker::invoke_compiler_on_method 1976 // 1977 // Compile a method. 1978 // 1979 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1980 task->print_ul(); 1981 if (PrintCompilation) { 1982 ResourceMark rm; 1983 task->print_tty(); 1984 } 1985 elapsedTimer time; 1986 1987 CompilerThread* thread = CompilerThread::current(); 1988 ResourceMark rm(thread); 1989 1990 if (LogEvents) { 1991 _compilation_log->log_compile(thread, task); 1992 } 1993 1994 // Common flags. 1995 uint compile_id = task->compile_id(); 1996 int osr_bci = task->osr_bci(); 1997 bool is_osr = (osr_bci != standard_entry_bci); 1998 bool should_log = (thread->log() != NULL); 1999 bool should_break = false; 2000 const int task_level = task->comp_level(); 2001 AbstractCompiler* comp = task->compiler(); 2002 2003 DirectiveSet* directive; 2004 { 2005 // create the handle inside it's own block so it can't 2006 // accidentally be referenced once the thread transitions to 2007 // native. The NoHandleMark before the transition should catch 2008 // any cases where this occurs in the future. 2009 methodHandle method(thread, task->method()); 2010 assert(!method->is_native(), "no longer compile natives"); 2011 2012 // Look up matching directives 2013 directive = DirectivesStack::getMatchingDirective(method, comp); 2014 2015 // Save information about this method in case of failure. 2016 set_last_compile(thread, method, is_osr, task_level); 2017 2018 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2019 } 2020 2021 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2022 if (should_log && !directive->LogOption) { 2023 should_log = false; 2024 } 2025 2026 // Allocate a new set of JNI handles. 2027 push_jni_handle_block(); 2028 Method* target_handle = task->method(); 2029 int compilable = ciEnv::MethodCompilable; 2030 const char* failure_reason = NULL; 2031 const char* retry_message = NULL; 2032 2033 int system_dictionary_modification_counter; 2034 { 2035 MutexLocker locker(Compile_lock, thread); 2036 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 2037 } 2038 2039 #if INCLUDE_JVMCI 2040 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2041 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2042 2043 TraceTime t1("compilation", &time); 2044 EventCompilation event; 2045 2046 // Skip redefined methods 2047 if (target_handle->is_old()) { 2048 failure_reason = "redefined method"; 2049 retry_message = "not retryable"; 2050 compilable = ciEnv::MethodCompilable_never; 2051 } else { 2052 JVMCIEnv env(task, system_dictionary_modification_counter); 2053 methodHandle method(thread, target_handle); 2054 jvmci->compile_method(method, osr_bci, &env); 2055 2056 failure_reason = env.failure_reason(); 2057 if (!env.retryable()) { 2058 retry_message = "not retryable"; 2059 compilable = ciEnv::MethodCompilable_not_at_tier; 2060 } 2061 } 2062 post_compile(thread, task, task->code() != NULL, NULL); 2063 if (event.should_commit()) { 2064 post_compilation_event(&event, task); 2065 } 2066 2067 } else 2068 #endif // INCLUDE_JVMCI 2069 { 2070 NoHandleMark nhm; 2071 ThreadToNativeFromVM ttn(thread); 2072 2073 ciEnv ci_env(task, system_dictionary_modification_counter); 2074 if (should_break) { 2075 ci_env.set_break_at_compile(true); 2076 } 2077 if (should_log) { 2078 ci_env.set_log(thread->log()); 2079 } 2080 assert(thread->env() == &ci_env, "set by ci_env"); 2081 // The thread-env() field is cleared in ~CompileTaskWrapper. 2082 2083 // Cache Jvmti state 2084 ci_env.cache_jvmti_state(); 2085 2086 // Cache DTrace flags 2087 ci_env.cache_dtrace_flags(); 2088 2089 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2090 2091 TraceTime t1("compilation", &time); 2092 EventCompilation event; 2093 2094 if (comp == NULL) { 2095 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2096 } else { 2097 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2098 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2099 while (WhiteBox::compilation_locked) { 2100 locker.wait(Mutex::_no_safepoint_check_flag); 2101 } 2102 } 2103 comp->compile_method(&ci_env, target, osr_bci, directive); 2104 } 2105 2106 if (!ci_env.failing() && task->code() == NULL) { 2107 //assert(false, "compiler should always document failure"); 2108 // The compiler elected, without comment, not to register a result. 2109 // Do not attempt further compilations of this method. 2110 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2111 } 2112 2113 // Copy this bit to the enclosing block: 2114 compilable = ci_env.compilable(); 2115 2116 if (ci_env.failing()) { 2117 failure_reason = ci_env.failure_reason(); 2118 retry_message = ci_env.retry_message(); 2119 ci_env.report_failure(failure_reason); 2120 } 2121 2122 post_compile(thread, task, !ci_env.failing(), &ci_env); 2123 if (event.should_commit()) { 2124 post_compilation_event(&event, task); 2125 } 2126 } 2127 // Remove the JNI handle block after the ciEnv destructor has run in 2128 // the previous block. 2129 pop_jni_handle_block(); 2130 2131 if (failure_reason != NULL) { 2132 task->set_failure_reason(failure_reason); 2133 if (_compilation_log != NULL) { 2134 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2135 } 2136 if (PrintCompilation) { 2137 FormatBufferResource msg = retry_message != NULL ? 2138 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2139 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2140 task->print(tty, msg); 2141 } 2142 } 2143 2144 methodHandle method(thread, task->method()); 2145 2146 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2147 2148 collect_statistics(thread, time, task); 2149 2150 nmethod* nm = task->code(); 2151 if (nm != NULL) { 2152 nm->maybe_print_nmethod(directive); 2153 } 2154 DirectivesStack::release(directive); 2155 2156 if (PrintCompilation && PrintCompilation2) { 2157 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2158 tty->print("%4d ", compile_id); // print compilation number 2159 tty->print("%s ", (is_osr ? "%" : " ")); 2160 if (task->code() != NULL) { 2161 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2162 } 2163 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2164 } 2165 2166 Log(compilation, codecache) log; 2167 if (log.is_debug()) { 2168 LogStream ls(log.debug()); 2169 codecache_print(&ls, /* detailed= */ false); 2170 } 2171 if (PrintCodeCacheOnCompilation) { 2172 codecache_print(/* detailed= */ false); 2173 } 2174 // Disable compilation, if required. 2175 switch (compilable) { 2176 case ciEnv::MethodCompilable_never: 2177 if (is_osr) 2178 method->set_not_osr_compilable_quietly(); 2179 else 2180 method->set_not_compilable_quietly(); 2181 break; 2182 case ciEnv::MethodCompilable_not_at_tier: 2183 if (is_osr) 2184 method->set_not_osr_compilable_quietly(task_level); 2185 else 2186 method->set_not_compilable_quietly(task_level); 2187 break; 2188 } 2189 2190 // Note that the queued_for_compilation bits are cleared without 2191 // protection of a mutex. [They were set by the requester thread, 2192 // when adding the task to the compile queue -- at which time the 2193 // compile queue lock was held. Subsequently, we acquired the compile 2194 // queue lock to get this task off the compile queue; thus (to belabour 2195 // the point somewhat) our clearing of the bits must be occurring 2196 // only after the setting of the bits. See also 14012000 above. 2197 method->clear_queued_for_compilation(); 2198 2199 #ifdef ASSERT 2200 if (CollectedHeap::fired_fake_oom()) { 2201 // The current compile received a fake OOM during compilation so 2202 // go ahead and exit the VM since the test apparently succeeded 2203 tty->print_cr("*** Shutting down VM after successful fake OOM"); 2204 vm_exit(0); 2205 } 2206 #endif 2207 } 2208 2209 /** 2210 * The CodeCache is full. Print warning and disable compilation. 2211 * Schedule code cache cleaning so compilation can continue later. 2212 * This function needs to be called only from CodeCache::allocate(), 2213 * since we currently handle a full code cache uniformly. 2214 */ 2215 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2216 UseInterpreter = true; 2217 if (UseCompiler || AlwaysCompileLoopMethods ) { 2218 if (xtty != NULL) { 2219 ResourceMark rm; 2220 stringStream s; 2221 // Dump code cache state into a buffer before locking the tty, 2222 // because log_state() will use locks causing lock conflicts. 2223 CodeCache::log_state(&s); 2224 // Lock to prevent tearing 2225 ttyLocker ttyl; 2226 xtty->begin_elem("code_cache_full"); 2227 xtty->print("%s", s.as_string()); 2228 xtty->stamp(); 2229 xtty->end_elem(); 2230 } 2231 2232 #ifndef PRODUCT 2233 if (CompileTheWorld || ExitOnFullCodeCache) { 2234 codecache_print(/* detailed= */ true); 2235 before_exit(JavaThread::current()); 2236 exit_globals(); // will delete tty 2237 vm_direct_exit(CompileTheWorld ? 0 : 1); 2238 } 2239 #endif 2240 if (UseCodeCacheFlushing) { 2241 // Since code cache is full, immediately stop new compiles 2242 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2243 NMethodSweeper::log_sweep("disable_compiler"); 2244 } 2245 } else { 2246 disable_compilation_forever(); 2247 } 2248 2249 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2250 } 2251 } 2252 2253 // ------------------------------------------------------------------ 2254 // CompileBroker::set_last_compile 2255 // 2256 // Record this compilation for debugging purposes. 2257 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2258 ResourceMark rm; 2259 char* method_name = method->name()->as_C_string(); 2260 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2261 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2262 char current_method[CompilerCounters::cmname_buffer_length]; 2263 size_t maxLen = CompilerCounters::cmname_buffer_length; 2264 2265 if (UsePerfData) { 2266 const char* class_name = method->method_holder()->name()->as_C_string(); 2267 2268 size_t s1len = strlen(class_name); 2269 size_t s2len = strlen(method_name); 2270 2271 // check if we need to truncate the string 2272 if (s1len + s2len + 2 > maxLen) { 2273 2274 // the strategy is to lop off the leading characters of the 2275 // class name and the trailing characters of the method name. 2276 2277 if (s2len + 2 > maxLen) { 2278 // lop of the entire class name string, let snprintf handle 2279 // truncation of the method name. 2280 class_name += s1len; // null string 2281 } 2282 else { 2283 // lop off the extra characters from the front of the class name 2284 class_name += ((s1len + s2len + 2) - maxLen); 2285 } 2286 } 2287 2288 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2289 } 2290 2291 if (CICountOSR && is_osr) { 2292 _last_compile_type = osr_compile; 2293 } else { 2294 _last_compile_type = normal_compile; 2295 } 2296 _last_compile_level = comp_level; 2297 2298 if (UsePerfData) { 2299 CompilerCounters* counters = thread->counters(); 2300 counters->set_current_method(current_method); 2301 counters->set_compile_type((jlong)_last_compile_type); 2302 } 2303 } 2304 2305 2306 // ------------------------------------------------------------------ 2307 // CompileBroker::push_jni_handle_block 2308 // 2309 // Push on a new block of JNI handles. 2310 void CompileBroker::push_jni_handle_block() { 2311 JavaThread* thread = JavaThread::current(); 2312 2313 // Allocate a new block for JNI handles. 2314 // Inlined code from jni_PushLocalFrame() 2315 JNIHandleBlock* java_handles = thread->active_handles(); 2316 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2317 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2318 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2319 thread->set_active_handles(compile_handles); 2320 } 2321 2322 2323 // ------------------------------------------------------------------ 2324 // CompileBroker::pop_jni_handle_block 2325 // 2326 // Pop off the current block of JNI handles. 2327 void CompileBroker::pop_jni_handle_block() { 2328 JavaThread* thread = JavaThread::current(); 2329 2330 // Release our JNI handle block 2331 JNIHandleBlock* compile_handles = thread->active_handles(); 2332 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2333 thread->set_active_handles(java_handles); 2334 compile_handles->set_pop_frame_link(NULL); 2335 JNIHandleBlock::release_block(compile_handles, thread); // may block 2336 } 2337 2338 // ------------------------------------------------------------------ 2339 // CompileBroker::collect_statistics 2340 // 2341 // Collect statistics about the compilation. 2342 2343 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2344 bool success = task->is_success(); 2345 methodHandle method (thread, task->method()); 2346 uint compile_id = task->compile_id(); 2347 bool is_osr = (task->osr_bci() != standard_entry_bci); 2348 nmethod* code = task->code(); 2349 CompilerCounters* counters = thread->counters(); 2350 2351 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2352 MutexLocker locker(CompileStatistics_lock); 2353 2354 // _perf variables are production performance counters which are 2355 // updated regardless of the setting of the CITime and CITimeEach flags 2356 // 2357 2358 // account all time, including bailouts and failures in this counter; 2359 // C1 and C2 counters are counting both successful and unsuccessful compiles 2360 _t_total_compilation.add(time); 2361 2362 if (!success) { 2363 _total_bailout_count++; 2364 if (UsePerfData) { 2365 _perf_last_failed_method->set_value(counters->current_method()); 2366 _perf_last_failed_type->set_value(counters->compile_type()); 2367 _perf_total_bailout_count->inc(); 2368 } 2369 _t_bailedout_compilation.add(time); 2370 } else if (code == NULL) { 2371 if (UsePerfData) { 2372 _perf_last_invalidated_method->set_value(counters->current_method()); 2373 _perf_last_invalidated_type->set_value(counters->compile_type()); 2374 _perf_total_invalidated_count->inc(); 2375 } 2376 _total_invalidated_count++; 2377 _t_invalidated_compilation.add(time); 2378 } else { 2379 // Compilation succeeded 2380 2381 // update compilation ticks - used by the implementation of 2382 // java.lang.management.CompilationMBean 2383 _perf_total_compilation->inc(time.ticks()); 2384 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2385 2386 if (CITime) { 2387 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2388 if (is_osr) { 2389 _t_osr_compilation.add(time); 2390 _sum_osr_bytes_compiled += bytes_compiled; 2391 } else { 2392 _t_standard_compilation.add(time); 2393 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2394 } 2395 2396 #if INCLUDE_JVMCI 2397 AbstractCompiler* comp = compiler(task->comp_level()); 2398 if (comp) { 2399 CompilerStatistics* stats = comp->stats(); 2400 if (stats) { 2401 if (is_osr) { 2402 stats->_osr.update(time, bytes_compiled); 2403 } else { 2404 stats->_standard.update(time, bytes_compiled); 2405 } 2406 stats->_nmethods_size += code->total_size(); 2407 stats->_nmethods_code_size += code->insts_size(); 2408 } else { // if (!stats) 2409 assert(false, "Compiler statistics object must exist"); 2410 } 2411 } else { // if (!comp) 2412 assert(false, "Compiler object must exist"); 2413 } 2414 #endif // INCLUDE_JVMCI 2415 } 2416 2417 if (UsePerfData) { 2418 // save the name of the last method compiled 2419 _perf_last_method->set_value(counters->current_method()); 2420 _perf_last_compile_type->set_value(counters->compile_type()); 2421 _perf_last_compile_size->set_value(method->code_size() + 2422 task->num_inlined_bytecodes()); 2423 if (is_osr) { 2424 _perf_osr_compilation->inc(time.ticks()); 2425 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2426 } else { 2427 _perf_standard_compilation->inc(time.ticks()); 2428 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2429 } 2430 } 2431 2432 if (CITimeEach) { 2433 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2434 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2435 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2436 } 2437 2438 // Collect counts of successful compilations 2439 _sum_nmethod_size += code->total_size(); 2440 _sum_nmethod_code_size += code->insts_size(); 2441 _total_compile_count++; 2442 2443 if (UsePerfData) { 2444 _perf_sum_nmethod_size->inc( code->total_size()); 2445 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2446 _perf_total_compile_count->inc(); 2447 } 2448 2449 if (is_osr) { 2450 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2451 _total_osr_compile_count++; 2452 } else { 2453 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2454 _total_standard_compile_count++; 2455 } 2456 } 2457 // set the current method for the thread to null 2458 if (UsePerfData) counters->set_current_method(""); 2459 } 2460 2461 const char* CompileBroker::compiler_name(int comp_level) { 2462 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2463 if (comp == NULL) { 2464 return "no compiler"; 2465 } else { 2466 return (comp->name()); 2467 } 2468 } 2469 2470 #if INCLUDE_JVMCI 2471 void CompileBroker::print_times(AbstractCompiler* comp) { 2472 CompilerStatistics* stats = comp->stats(); 2473 if (stats) { 2474 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}", 2475 comp->name(), stats->bytes_per_second(), 2476 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2477 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2478 stats->_nmethods_size, stats->_nmethods_code_size); 2479 } else { // if (!stats) 2480 assert(false, "Compiler statistics object must exist"); 2481 } 2482 comp->print_timers(); 2483 } 2484 #endif // INCLUDE_JVMCI 2485 2486 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2487 #if INCLUDE_JVMCI 2488 elapsedTimer standard_compilation; 2489 elapsedTimer total_compilation; 2490 elapsedTimer osr_compilation; 2491 2492 int standard_bytes_compiled = 0; 2493 int osr_bytes_compiled = 0; 2494 2495 int standard_compile_count = 0; 2496 int osr_compile_count = 0; 2497 int total_compile_count = 0; 2498 2499 int nmethods_size = 0; 2500 int nmethods_code_size = 0; 2501 bool printedHeader = false; 2502 2503 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2504 AbstractCompiler* comp = _compilers[i]; 2505 if (comp != NULL) { 2506 if (per_compiler && aggregate && !printedHeader) { 2507 printedHeader = true; 2508 tty->cr(); 2509 tty->print_cr("Individual compiler times (for compiled methods only)"); 2510 tty->print_cr("------------------------------------------------"); 2511 tty->cr(); 2512 } 2513 CompilerStatistics* stats = comp->stats(); 2514 2515 if (stats) { 2516 standard_compilation.add(stats->_standard._time); 2517 osr_compilation.add(stats->_osr._time); 2518 2519 standard_bytes_compiled += stats->_standard._bytes; 2520 osr_bytes_compiled += stats->_osr._bytes; 2521 2522 standard_compile_count += stats->_standard._count; 2523 osr_compile_count += stats->_osr._count; 2524 2525 nmethods_size += stats->_nmethods_size; 2526 nmethods_code_size += stats->_nmethods_code_size; 2527 } else { // if (!stats) 2528 assert(false, "Compiler statistics object must exist"); 2529 } 2530 2531 if (per_compiler) { 2532 print_times(comp); 2533 } 2534 } 2535 } 2536 total_compile_count = osr_compile_count + standard_compile_count; 2537 total_compilation.add(osr_compilation); 2538 total_compilation.add(standard_compilation); 2539 2540 // In hosted mode, print the JVMCI compiler specific counters manually. 2541 if (!UseJVMCICompiler) { 2542 JVMCICompiler::print_compilation_timers(); 2543 } 2544 #else // INCLUDE_JVMCI 2545 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2546 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2547 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2548 2549 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2550 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2551 2552 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2553 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2554 int total_compile_count = CompileBroker::_total_compile_count; 2555 2556 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2557 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2558 #endif // INCLUDE_JVMCI 2559 2560 if (!aggregate) { 2561 return; 2562 } 2563 tty->cr(); 2564 tty->print_cr("Accumulated compiler times"); 2565 tty->print_cr("----------------------------------------------------------"); 2566 //0000000000111111111122222222223333333333444444444455555555556666666666 2567 //0123456789012345678901234567890123456789012345678901234567890123456789 2568 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2569 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2570 standard_compilation.seconds(), 2571 standard_compilation.seconds() / standard_compile_count); 2572 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2573 CompileBroker::_t_bailedout_compilation.seconds(), 2574 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2575 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2576 osr_compilation.seconds(), 2577 osr_compilation.seconds() / osr_compile_count); 2578 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2579 CompileBroker::_t_invalidated_compilation.seconds(), 2580 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2581 2582 AbstractCompiler *comp = compiler(CompLevel_simple); 2583 if (comp != NULL) { 2584 tty->cr(); 2585 comp->print_timers(); 2586 } 2587 comp = compiler(CompLevel_full_optimization); 2588 if (comp != NULL) { 2589 tty->cr(); 2590 comp->print_timers(); 2591 } 2592 tty->cr(); 2593 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2594 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2595 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2596 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2597 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2598 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2599 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2600 double tcs = total_compilation.seconds(); 2601 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2602 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2603 tty->cr(); 2604 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2605 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2606 } 2607 2608 // Debugging output for failure 2609 void CompileBroker::print_last_compile() { 2610 if (_last_compile_level != CompLevel_none && 2611 compiler(_last_compile_level) != NULL && 2612 _last_compile_type != no_compile) { 2613 if (_last_compile_type == osr_compile) { 2614 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2615 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2616 } else { 2617 tty->print_cr("Last parse: %d+++(%d) %s", 2618 _compilation_id, _last_compile_level, _last_method_compiled); 2619 } 2620 } 2621 } 2622 2623 // Print general/accumulated JIT information. 2624 void CompileBroker::print_info(outputStream *out) { 2625 if (out == NULL) out = tty; 2626 out->cr(); 2627 out->print_cr("======================"); 2628 out->print_cr(" General JIT info "); 2629 out->print_cr("======================"); 2630 out->cr(); 2631 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2632 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2633 out->cr(); 2634 out->print_cr("CodeCache overview"); 2635 out->print_cr("--------------------------------------------------------"); 2636 out->cr(); 2637 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2638 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2639 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2640 out->cr(); 2641 2642 out->cr(); 2643 out->print_cr("CodeCache cleaning overview"); 2644 out->print_cr("--------------------------------------------------------"); 2645 out->cr(); 2646 NMethodSweeper::print(out); 2647 out->print_cr("--------------------------------------------------------"); 2648 out->cr(); 2649 } 2650 2651 // Note: tty_lock must not be held upon entry to this function. 2652 // Print functions called from herein do "micro-locking" on tty_lock. 2653 // That's a tradeoff which keeps together important blocks of output. 2654 // At the same time, continuous tty_lock hold time is kept in check, 2655 // preventing concurrently printing threads from stalling a long time. 2656 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) { 2657 TimeStamp ts_total; 2658 TimeStamp ts; 2659 2660 bool allFun = !strcmp(function, "all"); 2661 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2662 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2663 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2664 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2665 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2666 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2667 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2668 bool discard = !strcmp(function, "discard") || allFun; 2669 2670 if (out == NULL) { 2671 out = tty; 2672 } 2673 2674 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2675 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2676 out->cr(); 2677 return; 2678 } 2679 2680 ts_total.update(); // record starting point 2681 2682 if (aggregate) { 2683 print_info(out); 2684 } 2685 2686 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2687 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function. 2688 // When we request individual parts of the analysis via the jcmd interface, it is possible 2689 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2690 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2691 // across user interaction. 2692 ts.update(); // record starting point 2693 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2694 out->cr(); 2695 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds()); 2696 out->cr(); 2697 2698 if (aggregate) { 2699 // It is sufficient to hold the CodeCache_lock only for the aggregate step. 2700 // All other functions operate on aggregated data - except MethodNames, but that should be safe. 2701 // The separate CodeHeapStateAnalytics_lock protects the printing functions against 2702 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock. 2703 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2704 // leading to an unnecessarily long hold time of the CodeCache_lock. 2705 ts.update(); // record starting point 2706 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag); 2707 out->cr(); 2708 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds()); 2709 out->cr(); 2710 2711 ts.update(); // record starting point 2712 CodeCache::aggregate(out, granularity); 2713 out->cr(); 2714 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds()); 2715 out->cr(); 2716 } 2717 2718 if (usedSpace) CodeCache::print_usedSpace(out); 2719 if (freeSpace) CodeCache::print_freeSpace(out); 2720 if (methodCount) CodeCache::print_count(out); 2721 if (methodSpace) CodeCache::print_space(out); 2722 if (methodAge) CodeCache::print_age(out); 2723 if (methodNames) CodeCache::print_names(out); 2724 if (discard) CodeCache::discard(out); 2725 2726 out->cr(); 2727 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds()); 2728 out->cr(); 2729 }