1 /* 2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "code/codeHeapState.hpp" 32 #include "code/dependencyContext.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "compiler/compileLog.hpp" 35 #include "compiler/compilerOracle.hpp" 36 #include "compiler/directivesParser.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "jfr/jfrEvents.hpp" 39 #include "logging/log.hpp" 40 #include "logging/logStream.hpp" 41 #include "memory/allocation.inline.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "oops/methodData.hpp" 44 #include "oops/method.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "prims/whitebox.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/atomic.hpp" 50 #include "runtime/compilationPolicy.hpp" 51 #include "runtime/handles.inline.hpp" 52 #include "runtime/init.hpp" 53 #include "runtime/interfaceSupport.inline.hpp" 54 #include "runtime/javaCalls.hpp" 55 #include "runtime/jniHandles.inline.hpp" 56 #include "runtime/os.hpp" 57 #include "runtime/safepointVerifiers.hpp" 58 #include "runtime/sharedRuntime.hpp" 59 #include "runtime/sweeper.hpp" 60 #include "runtime/timerTrace.hpp" 61 #include "runtime/vframe.inline.hpp" 62 #include "utilities/debug.hpp" 63 #include "utilities/dtrace.hpp" 64 #include "utilities/events.hpp" 65 #include "utilities/formatBuffer.hpp" 66 #include "utilities/macros.hpp" 67 #ifdef COMPILER1 68 #include "c1/c1_Compiler.hpp" 69 #endif 70 #if INCLUDE_JVMCI 71 #include "jvmci/jvmciEnv.hpp" 72 #include "jvmci/jvmciRuntime.hpp" 73 #endif 74 #ifdef COMPILER2 75 #include "opto/c2compiler.hpp" 76 #endif 77 78 #ifdef DTRACE_ENABLED 79 80 // Only bother with this argument setup if dtrace is available 81 82 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 83 { \ 84 Symbol* klass_name = (method)->klass_name(); \ 85 Symbol* name = (method)->name(); \ 86 Symbol* signature = (method)->signature(); \ 87 HOTSPOT_METHOD_COMPILE_BEGIN( \ 88 (char *) comp_name, strlen(comp_name), \ 89 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 90 (char *) name->bytes(), name->utf8_length(), \ 91 (char *) signature->bytes(), signature->utf8_length()); \ 92 } 93 94 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 95 { \ 96 Symbol* klass_name = (method)->klass_name(); \ 97 Symbol* name = (method)->name(); \ 98 Symbol* signature = (method)->signature(); \ 99 HOTSPOT_METHOD_COMPILE_END( \ 100 (char *) comp_name, strlen(comp_name), \ 101 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 102 (char *) name->bytes(), name->utf8_length(), \ 103 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 104 } 105 106 #else // ndef DTRACE_ENABLED 107 108 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 109 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 110 111 #endif // ndef DTRACE_ENABLED 112 113 bool CompileBroker::_initialized = false; 114 volatile bool CompileBroker::_should_block = false; 115 volatile int CompileBroker::_print_compilation_warning = 0; 116 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 117 118 // The installed compiler(s) 119 AbstractCompiler* CompileBroker::_compilers[2]; 120 121 // The maximum numbers of compiler threads to be determined during startup. 122 int CompileBroker::_c1_count = 0; 123 int CompileBroker::_c2_count = 0; 124 125 // An array of compiler names as Java String objects 126 jobject* CompileBroker::_compiler1_objects = NULL; 127 jobject* CompileBroker::_compiler2_objects = NULL; 128 129 CompileLog** CompileBroker::_compiler1_logs = NULL; 130 CompileLog** CompileBroker::_compiler2_logs = NULL; 131 132 // These counters are used to assign an unique ID to each compilation. 133 volatile jint CompileBroker::_compilation_id = 0; 134 volatile jint CompileBroker::_osr_compilation_id = 0; 135 136 // Performance counters 137 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 138 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 139 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 140 141 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 142 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 143 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 144 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 145 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 146 147 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 148 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 149 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 150 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 151 152 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 153 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 154 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 155 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 156 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 157 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 158 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 159 160 // Timers and counters for generating statistics 161 elapsedTimer CompileBroker::_t_total_compilation; 162 elapsedTimer CompileBroker::_t_osr_compilation; 163 elapsedTimer CompileBroker::_t_standard_compilation; 164 elapsedTimer CompileBroker::_t_invalidated_compilation; 165 elapsedTimer CompileBroker::_t_bailedout_compilation; 166 167 int CompileBroker::_total_bailout_count = 0; 168 int CompileBroker::_total_invalidated_count = 0; 169 int CompileBroker::_total_compile_count = 0; 170 int CompileBroker::_total_osr_compile_count = 0; 171 int CompileBroker::_total_standard_compile_count = 0; 172 int CompileBroker::_total_compiler_stopped_count = 0; 173 int CompileBroker::_total_compiler_restarted_count = 0; 174 175 int CompileBroker::_sum_osr_bytes_compiled = 0; 176 int CompileBroker::_sum_standard_bytes_compiled = 0; 177 int CompileBroker::_sum_nmethod_size = 0; 178 int CompileBroker::_sum_nmethod_code_size = 0; 179 180 long CompileBroker::_peak_compilation_time = 0; 181 182 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 183 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 184 185 186 187 class CompilationLog : public StringEventLog { 188 public: 189 CompilationLog() : StringEventLog("Compilation events") { 190 } 191 192 void log_compile(JavaThread* thread, CompileTask* task) { 193 StringLogMessage lm; 194 stringStream sstr = lm.stream(); 195 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 196 task->print(&sstr, NULL, true, false); 197 log(thread, "%s", (const char*)lm); 198 } 199 200 void log_nmethod(JavaThread* thread, nmethod* nm) { 201 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 202 nm->compile_id(), nm->is_osr_method() ? "%" : "", 203 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 204 } 205 206 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 207 StringLogMessage lm; 208 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 209 if (retry_message != NULL) { 210 lm.append(" (%s)", retry_message); 211 } 212 lm.print("\n"); 213 log(thread, "%s", (const char*)lm); 214 } 215 216 void log_metaspace_failure(const char* reason) { 217 ResourceMark rm; 218 StringLogMessage lm; 219 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 220 lm.print("\n"); 221 log(JavaThread::current(), "%s", (const char*)lm); 222 } 223 }; 224 225 static CompilationLog* _compilation_log = NULL; 226 227 bool compileBroker_init() { 228 if (LogEvents) { 229 _compilation_log = new CompilationLog(); 230 } 231 232 // init directives stack, adding default directive 233 DirectivesStack::init(); 234 235 if (DirectivesParser::has_file()) { 236 return DirectivesParser::parse_from_flag(); 237 } else if (CompilerDirectivesPrint) { 238 // Print default directive even when no other was added 239 DirectivesStack::print(tty); 240 } 241 242 return true; 243 } 244 245 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 246 CompilerThread* thread = CompilerThread::current(); 247 thread->set_task(task); 248 #if INCLUDE_JVMCI 249 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 250 task->set_jvmci_compiler_thread(thread); 251 } 252 #endif 253 CompileLog* log = thread->log(); 254 if (log != NULL && !task->is_unloaded()) task->log_task_start(log); 255 } 256 257 CompileTaskWrapper::~CompileTaskWrapper() { 258 CompilerThread* thread = CompilerThread::current(); 259 CompileTask* task = thread->task(); 260 CompileLog* log = thread->log(); 261 if (log != NULL && !task->is_unloaded()) task->log_task_done(log); 262 thread->set_task(NULL); 263 task->set_code_handle(NULL); 264 thread->set_env(NULL); 265 if (task->is_blocking()) { 266 bool free_task = false; 267 { 268 MutexLocker notifier(task->lock(), thread); 269 task->mark_complete(); 270 #if INCLUDE_JVMCI 271 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 272 if (!task->has_waiter()) { 273 // The waiting thread timed out and thus did not free the task. 274 free_task = true; 275 } 276 task->set_jvmci_compiler_thread(NULL); 277 } 278 #endif 279 if (!free_task) { 280 // Notify the waiting thread that the compilation has completed 281 // so that it can free the task. 282 task->lock()->notify_all(); 283 } 284 } 285 if (free_task) { 286 // The task can only be freed once the task lock is released. 287 CompileTask::free(task); 288 } 289 } else { 290 task->mark_complete(); 291 292 // By convention, the compiling thread is responsible for 293 // recycling a non-blocking CompileTask. 294 CompileTask::free(task); 295 } 296 } 297 298 /** 299 * Check if a CompilerThread can be removed and update count if requested. 300 */ 301 static bool can_remove(CompilerThread *ct, bool do_it) { 302 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 303 if (!ReduceNumberOfCompilerThreads) return false; 304 305 AbstractCompiler *compiler = ct->compiler(); 306 int compiler_count = compiler->num_compiler_threads(); 307 bool c1 = compiler->is_c1(); 308 309 // Keep at least 1 compiler thread of each type. 310 if (compiler_count < 2) return false; 311 312 // Keep thread alive for at least some time. 313 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 314 315 // We only allow the last compiler thread of each type to get removed. 316 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1) 317 : CompileBroker::compiler2_object(compiler_count - 1); 318 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) { 319 if (do_it) { 320 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 321 compiler->set_num_compiler_threads(compiler_count - 1); 322 } 323 return true; 324 } 325 return false; 326 } 327 328 /** 329 * Add a CompileTask to a CompileQueue. 330 */ 331 void CompileQueue::add(CompileTask* task) { 332 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 333 334 task->set_next(NULL); 335 task->set_prev(NULL); 336 337 if (_last == NULL) { 338 // The compile queue is empty. 339 assert(_first == NULL, "queue is empty"); 340 _first = task; 341 _last = task; 342 } else { 343 // Append the task to the queue. 344 assert(_last->next() == NULL, "not last"); 345 _last->set_next(task); 346 task->set_prev(_last); 347 _last = task; 348 } 349 ++_size; 350 351 // Mark the method as being in the compile queue. 352 task->method()->set_queued_for_compilation(); 353 354 if (CIPrintCompileQueue) { 355 print_tty(); 356 } 357 358 if (LogCompilation && xtty != NULL) { 359 task->log_task_queued(); 360 } 361 362 // Notify CompilerThreads that a task is available. 363 MethodCompileQueue_lock->notify_all(); 364 } 365 366 /** 367 * Empties compilation queue by putting all compilation tasks onto 368 * a freelist. Furthermore, the method wakes up all threads that are 369 * waiting on a compilation task to finish. This can happen if background 370 * compilation is disabled. 371 */ 372 void CompileQueue::free_all() { 373 MutexLocker mu(MethodCompileQueue_lock); 374 CompileTask* next = _first; 375 376 // Iterate over all tasks in the compile queue 377 while (next != NULL) { 378 CompileTask* current = next; 379 next = current->next(); 380 { 381 // Wake up thread that blocks on the compile task. 382 MutexLocker ct_lock(current->lock()); 383 current->lock()->notify(); 384 } 385 // Put the task back on the freelist. 386 CompileTask::free(current); 387 } 388 _first = NULL; 389 390 // Wake up all threads that block on the queue. 391 MethodCompileQueue_lock->notify_all(); 392 } 393 394 /** 395 * Get the next CompileTask from a CompileQueue 396 */ 397 CompileTask* CompileQueue::get() { 398 // save methods from RedefineClasses across safepoint 399 // across MethodCompileQueue_lock below. 400 methodHandle save_method; 401 methodHandle save_hot_method; 402 403 MonitorLocker locker(MethodCompileQueue_lock); 404 // If _first is NULL we have no more compile jobs. There are two reasons for 405 // having no compile jobs: First, we compiled everything we wanted. Second, 406 // we ran out of code cache so compilation has been disabled. In the latter 407 // case we perform code cache sweeps to free memory such that we can re-enable 408 // compilation. 409 while (_first == NULL) { 410 // Exit loop if compilation is disabled forever 411 if (CompileBroker::is_compilation_disabled_forever()) { 412 return NULL; 413 } 414 415 // If there are no compilation tasks and we can compile new jobs 416 // (i.e., there is enough free space in the code cache) there is 417 // no need to invoke the sweeper. As a result, the hotness of methods 418 // remains unchanged. This behavior is desired, since we want to keep 419 // the stable state, i.e., we do not want to evict methods from the 420 // code cache if it is unnecessary. 421 // We need a timed wait here, since compiler threads can exit if compilation 422 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 423 // is not critical and we do not want idle compiler threads to wake up too often. 424 locker.wait(5*1000); 425 426 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 427 // Still nothing to compile. Give caller a chance to stop this thread. 428 if (can_remove(CompilerThread::current(), false)) return NULL; 429 } 430 } 431 432 if (CompileBroker::is_compilation_disabled_forever()) { 433 return NULL; 434 } 435 436 CompileTask* task; 437 { 438 NoSafepointVerifier nsv; 439 task = CompilationPolicy::policy()->select_task(this); 440 if (task != NULL) { 441 task = task->select_for_compilation(); 442 } 443 } 444 445 if (task != NULL) { 446 // Save method pointers across unlock safepoint. The task is removed from 447 // the compilation queue, which is walked during RedefineClasses. 448 save_method = methodHandle(task->method()); 449 save_hot_method = methodHandle(task->hot_method()); 450 451 remove(task); 452 } 453 purge_stale_tasks(); // may temporarily release MCQ lock 454 return task; 455 } 456 457 // Clean & deallocate stale compile tasks. 458 // Temporarily releases MethodCompileQueue lock. 459 void CompileQueue::purge_stale_tasks() { 460 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 461 if (_first_stale != NULL) { 462 // Stale tasks are purged when MCQ lock is released, 463 // but _first_stale updates are protected by MCQ lock. 464 // Once task processing starts and MCQ lock is released, 465 // other compiler threads can reuse _first_stale. 466 CompileTask* head = _first_stale; 467 _first_stale = NULL; 468 { 469 MutexUnlocker ul(MethodCompileQueue_lock); 470 for (CompileTask* task = head; task != NULL; ) { 471 CompileTask* next_task = task->next(); 472 CompileTaskWrapper ctw(task); // Frees the task 473 task->set_failure_reason("stale task"); 474 task = next_task; 475 } 476 } 477 } 478 } 479 480 void CompileQueue::remove(CompileTask* task) { 481 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 482 if (task->prev() != NULL) { 483 task->prev()->set_next(task->next()); 484 } else { 485 // max is the first element 486 assert(task == _first, "Sanity"); 487 _first = task->next(); 488 } 489 490 if (task->next() != NULL) { 491 task->next()->set_prev(task->prev()); 492 } else { 493 // max is the last element 494 assert(task == _last, "Sanity"); 495 _last = task->prev(); 496 } 497 --_size; 498 } 499 500 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 501 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 502 remove(task); 503 504 // Enqueue the task for reclamation (should be done outside MCQ lock) 505 task->set_next(_first_stale); 506 task->set_prev(NULL); 507 _first_stale = task; 508 } 509 510 // methods in the compile queue need to be marked as used on the stack 511 // so that they don't get reclaimed by Redefine Classes 512 void CompileQueue::mark_on_stack() { 513 CompileTask* task = _first; 514 while (task != NULL) { 515 task->mark_on_stack(); 516 task = task->next(); 517 } 518 } 519 520 521 CompileQueue* CompileBroker::compile_queue(int comp_level) { 522 if (is_c2_compile(comp_level)) return _c2_compile_queue; 523 if (is_c1_compile(comp_level)) return _c1_compile_queue; 524 return NULL; 525 } 526 527 void CompileBroker::print_compile_queues(outputStream* st) { 528 st->print_cr("Current compiles: "); 529 530 char buf[2000]; 531 int buflen = sizeof(buf); 532 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true); 533 534 st->cr(); 535 if (_c1_compile_queue != NULL) { 536 _c1_compile_queue->print(st); 537 } 538 if (_c2_compile_queue != NULL) { 539 _c2_compile_queue->print(st); 540 } 541 } 542 543 void CompileQueue::print(outputStream* st) { 544 assert_locked_or_safepoint(MethodCompileQueue_lock); 545 st->print_cr("%s:", name()); 546 CompileTask* task = _first; 547 if (task == NULL) { 548 st->print_cr("Empty"); 549 } else { 550 while (task != NULL) { 551 task->print(st, NULL, true, true); 552 task = task->next(); 553 } 554 } 555 st->cr(); 556 } 557 558 void CompileQueue::print_tty() { 559 ttyLocker ttyl; 560 print(tty); 561 } 562 563 CompilerCounters::CompilerCounters() { 564 _current_method[0] = '\0'; 565 _compile_type = CompileBroker::no_compile; 566 } 567 568 // ------------------------------------------------------------------ 569 // CompileBroker::compilation_init 570 // 571 // Initialize the Compilation object 572 void CompileBroker::compilation_init_phase1(TRAPS) { 573 // No need to initialize compilation system if we do not use it. 574 if (!UseCompiler) { 575 return; 576 } 577 // Set the interface to the current compiler(s). 578 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 579 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 580 581 #if INCLUDE_JVMCI 582 if (EnableJVMCI) { 583 // This is creating a JVMCICompiler singleton. 584 JVMCICompiler* jvmci = new JVMCICompiler(); 585 586 if (UseJVMCICompiler) { 587 _compilers[1] = jvmci; 588 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 589 if (BootstrapJVMCI) { 590 // JVMCI will bootstrap so give it more threads 591 _c2_count = MIN2(32, os::active_processor_count()); 592 } 593 } else { 594 _c2_count = JVMCIThreads; 595 } 596 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 597 } else { 598 _c1_count = JVMCIHostThreads; 599 } 600 } 601 } 602 #endif // INCLUDE_JVMCI 603 604 #ifdef COMPILER1 605 if (_c1_count > 0) { 606 _compilers[0] = new Compiler(); 607 } 608 #endif // COMPILER1 609 610 #ifdef COMPILER2 611 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 612 if (_c2_count > 0) { 613 _compilers[1] = new C2Compiler(); 614 } 615 } 616 #endif // COMPILER2 617 618 // Start the compiler thread(s) and the sweeper thread 619 init_compiler_sweeper_threads(); 620 // totalTime performance counter is always created as it is required 621 // by the implementation of java.lang.management.CompilationMBean. 622 { 623 EXCEPTION_MARK; 624 _perf_total_compilation = 625 PerfDataManager::create_counter(JAVA_CI, "totalTime", 626 PerfData::U_Ticks, CHECK); 627 } 628 629 if (UsePerfData) { 630 631 EXCEPTION_MARK; 632 633 // create the jvmstat performance counters 634 _perf_osr_compilation = 635 PerfDataManager::create_counter(SUN_CI, "osrTime", 636 PerfData::U_Ticks, CHECK); 637 638 _perf_standard_compilation = 639 PerfDataManager::create_counter(SUN_CI, "standardTime", 640 PerfData::U_Ticks, CHECK); 641 642 _perf_total_bailout_count = 643 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 644 PerfData::U_Events, CHECK); 645 646 _perf_total_invalidated_count = 647 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 648 PerfData::U_Events, CHECK); 649 650 _perf_total_compile_count = 651 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 652 PerfData::U_Events, CHECK); 653 _perf_total_osr_compile_count = 654 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 655 PerfData::U_Events, CHECK); 656 657 _perf_total_standard_compile_count = 658 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 659 PerfData::U_Events, CHECK); 660 661 _perf_sum_osr_bytes_compiled = 662 PerfDataManager::create_counter(SUN_CI, "osrBytes", 663 PerfData::U_Bytes, CHECK); 664 665 _perf_sum_standard_bytes_compiled = 666 PerfDataManager::create_counter(SUN_CI, "standardBytes", 667 PerfData::U_Bytes, CHECK); 668 669 _perf_sum_nmethod_size = 670 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 671 PerfData::U_Bytes, CHECK); 672 673 _perf_sum_nmethod_code_size = 674 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 675 PerfData::U_Bytes, CHECK); 676 677 _perf_last_method = 678 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 679 CompilerCounters::cmname_buffer_length, 680 "", CHECK); 681 682 _perf_last_failed_method = 683 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 684 CompilerCounters::cmname_buffer_length, 685 "", CHECK); 686 687 _perf_last_invalidated_method = 688 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 689 CompilerCounters::cmname_buffer_length, 690 "", CHECK); 691 692 _perf_last_compile_type = 693 PerfDataManager::create_variable(SUN_CI, "lastType", 694 PerfData::U_None, 695 (jlong)CompileBroker::no_compile, 696 CHECK); 697 698 _perf_last_compile_size = 699 PerfDataManager::create_variable(SUN_CI, "lastSize", 700 PerfData::U_Bytes, 701 (jlong)CompileBroker::no_compile, 702 CHECK); 703 704 705 _perf_last_failed_type = 706 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 707 PerfData::U_None, 708 (jlong)CompileBroker::no_compile, 709 CHECK); 710 711 _perf_last_invalidated_type = 712 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 713 PerfData::U_None, 714 (jlong)CompileBroker::no_compile, 715 CHECK); 716 } 717 } 718 719 // Completes compiler initialization. Compilation requests submitted 720 // prior to this will be silently ignored. 721 void CompileBroker::compilation_init_phase2() { 722 _initialized = true; 723 } 724 725 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) { 726 Handle string = java_lang_String::create_from_str(name, CHECK_NH); 727 Handle thread_group(THREAD, Universe::system_thread_group()); 728 return JavaCalls::construct_new_instance( 729 SystemDictionary::Thread_klass(), 730 vmSymbols::threadgroup_string_void_signature(), 731 thread_group, 732 string, 733 CHECK_NH); 734 } 735 736 737 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) { 738 JavaThread* thread = NULL; 739 { 740 MutexLocker mu(Threads_lock, THREAD); 741 if (comp != NULL) { 742 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { 743 CompilerCounters* counters = new CompilerCounters(); 744 thread = new CompilerThread(queue, counters); 745 } 746 } else { 747 thread = new CodeCacheSweeperThread(); 748 } 749 // At this point the new CompilerThread data-races with this startup 750 // thread (which I believe is the primoridal thread and NOT the VM 751 // thread). This means Java bytecodes being executed at startup can 752 // queue compile jobs which will run at whatever default priority the 753 // newly created CompilerThread runs at. 754 755 756 // At this point it may be possible that no osthread was created for the 757 // JavaThread due to lack of memory. We would have to throw an exception 758 // in that case. However, since this must work and we do not allow 759 // exceptions anyway, check and abort if this fails. But first release the 760 // lock. 761 762 if (thread != NULL && thread->osthread() != NULL) { 763 764 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread); 765 766 // Note that this only sets the JavaThread _priority field, which by 767 // definition is limited to Java priorities and not OS priorities. 768 // The os-priority is set in the CompilerThread startup code itself 769 770 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority); 771 772 // Note that we cannot call os::set_priority because it expects Java 773 // priorities and we are *explicitly* using OS priorities so that it's 774 // possible to set the compiler thread priority higher than any Java 775 // thread. 776 777 int native_prio = CompilerThreadPriority; 778 if (native_prio == -1) { 779 if (UseCriticalCompilerThreadPriority) { 780 native_prio = os::java_to_os_priority[CriticalPriority]; 781 } else { 782 native_prio = os::java_to_os_priority[NearMaxPriority]; 783 } 784 } 785 os::set_native_priority(thread, native_prio); 786 787 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle)); 788 789 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle)); 790 if (comp != NULL) { 791 thread->as_CompilerThread()->set_compiler(comp); 792 } 793 Threads::add(thread); 794 Thread::start(thread); 795 } 796 } 797 798 // First release lock before aborting VM. 799 if (thread == NULL || thread->osthread() == NULL) { 800 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) { 801 if (thread != NULL) { 802 thread->smr_delete(); 803 } 804 return NULL; 805 } 806 vm_exit_during_initialization("java.lang.OutOfMemoryError", 807 os::native_thread_creation_failed_msg()); 808 } 809 810 // Let go of Threads_lock before yielding 811 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 812 813 return thread; 814 } 815 816 817 void CompileBroker::init_compiler_sweeper_threads() { 818 EXCEPTION_MARK; 819 #if !defined(ZERO) 820 assert(_c2_count > 0 || _c1_count > 0, "No compilers?"); 821 #endif // !ZERO 822 // Initialize the compilation queue 823 if (_c2_count > 0) { 824 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 825 _c2_compile_queue = new CompileQueue(name); 826 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler); 827 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler); 828 } 829 if (_c1_count > 0) { 830 _c1_compile_queue = new CompileQueue("C1 compile queue"); 831 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler); 832 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler); 833 } 834 835 char name_buffer[256]; 836 837 for (int i = 0; i < _c2_count; i++) { 838 // Create a name for our thread. 839 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 840 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 841 jobject thread_handle = JNIHandles::make_global(thread_oop); 842 _compiler2_objects[i] = thread_handle; 843 _compiler2_logs[i] = NULL; 844 845 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 846 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK); 847 assert(ct != NULL, "should have been handled for initial thread"); 848 _compilers[1]->set_num_compiler_threads(i + 1); 849 if (TraceCompilerThreads) { 850 ResourceMark rm; 851 MutexLocker mu(Threads_lock); 852 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 853 } 854 } 855 } 856 857 for (int i = 0; i < _c1_count; i++) { 858 // Create a name for our thread. 859 sprintf(name_buffer, "C1 CompilerThread%d", i); 860 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 861 jobject thread_handle = JNIHandles::make_global(thread_oop); 862 _compiler1_objects[i] = thread_handle; 863 _compiler1_logs[i] = NULL; 864 865 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 866 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK); 867 assert(ct != NULL, "should have been handled for initial thread"); 868 _compilers[0]->set_num_compiler_threads(i + 1); 869 if (TraceCompilerThreads) { 870 ResourceMark rm; 871 MutexLocker mu(Threads_lock); 872 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 873 } 874 } 875 } 876 877 if (UsePerfData) { 878 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 879 } 880 881 if (MethodFlushing) { 882 // Initialize the sweeper thread 883 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK); 884 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop()); 885 make_thread(thread_handle, NULL, NULL, CHECK); 886 } 887 } 888 889 void CompileBroker::possibly_add_compiler_threads() { 890 EXCEPTION_MARK; 891 892 julong available_memory = os::available_memory(); 893 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All). 894 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled), 895 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled); 896 897 // 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 = MIN4(_c2_count, 903 _c2_compile_queue->size() / 2, 904 (int)(available_memory / (200*M)), 905 (int)(available_cc_np / (128*K))); 906 907 for (int i = old_c2_count; i < new_c2_count; i++) { 908 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK); 909 if (ct == NULL) break; 910 _compilers[1]->set_num_compiler_threads(i + 1); 911 if (TraceCompilerThreads) { 912 ResourceMark rm; 913 MutexLocker mu(Threads_lock); 914 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)", 915 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M)); 916 } 917 } 918 } 919 920 if (_c1_compile_queue != NULL) { 921 int old_c1_count = _compilers[0]->num_compiler_threads(); 922 int new_c1_count = MIN4(_c1_count, 923 _c1_compile_queue->size() / 4, 924 (int)(available_memory / (100*M)), 925 (int)(available_cc_p / (128*K))); 926 927 for (int i = old_c1_count; i < new_c1_count; i++) { 928 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK); 929 if (ct == NULL) break; 930 _compilers[0]->set_num_compiler_threads(i + 1); 931 if (TraceCompilerThreads) { 932 ResourceMark rm; 933 MutexLocker mu(Threads_lock); 934 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)", 935 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M)); 936 } 937 } 938 } 939 940 CompileThread_lock->unlock(); 941 } 942 943 944 /** 945 * Set the methods on the stack as on_stack so that redefine classes doesn't 946 * reclaim them. This method is executed at a safepoint. 947 */ 948 void CompileBroker::mark_on_stack() { 949 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 950 // Since we are at a safepoint, we do not need a lock to access 951 // the compile queues. 952 if (_c2_compile_queue != NULL) { 953 _c2_compile_queue->mark_on_stack(); 954 } 955 if (_c1_compile_queue != NULL) { 956 _c1_compile_queue->mark_on_stack(); 957 } 958 } 959 960 // ------------------------------------------------------------------ 961 // CompileBroker::compile_method 962 // 963 // Request compilation of a method. 964 void CompileBroker::compile_method_base(const methodHandle& method, 965 int osr_bci, 966 int comp_level, 967 const methodHandle& hot_method, 968 int hot_count, 969 CompileTask::CompileReason compile_reason, 970 bool blocking, 971 Thread* thread) { 972 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 973 assert(method->method_holder()->is_instance_klass(), 974 "sanity check"); 975 assert(!method->method_holder()->is_not_initialized(), 976 "method holder must be initialized"); 977 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 978 979 if (CIPrintRequests) { 980 tty->print("request: "); 981 method->print_short_name(tty); 982 if (osr_bci != InvocationEntryBci) { 983 tty->print(" osr_bci: %d", osr_bci); 984 } 985 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 986 if (!hot_method.is_null()) { 987 tty->print(" hot: "); 988 if (hot_method() != method()) { 989 hot_method->print_short_name(tty); 990 } else { 991 tty->print("yes"); 992 } 993 } 994 tty->cr(); 995 } 996 997 // A request has been made for compilation. Before we do any 998 // real work, check to see if the method has been compiled 999 // in the meantime with a definitive result. 1000 if (compilation_is_complete(method, osr_bci, comp_level)) { 1001 return; 1002 } 1003 1004 #ifndef PRODUCT 1005 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1006 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1007 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1008 return; 1009 } 1010 } 1011 #endif 1012 1013 // If this method is already in the compile queue, then 1014 // we do not block the current thread. 1015 if (compilation_is_in_queue(method)) { 1016 // We may want to decay our counter a bit here to prevent 1017 // multiple denied requests for compilation. This is an 1018 // open compilation policy issue. Note: The other possibility, 1019 // in the case that this is a blocking compile request, is to have 1020 // all subsequent blocking requesters wait for completion of 1021 // ongoing compiles. Note that in this case we'll need a protocol 1022 // for freeing the associated compile tasks. [Or we could have 1023 // a single static monitor on which all these waiters sleep.] 1024 return; 1025 } 1026 1027 if (TieredCompilation) { 1028 // Tiered policy requires MethodCounters to exist before adding a method to 1029 // the queue. Create if we don't have them yet. 1030 method->get_method_counters(thread); 1031 } 1032 1033 // Outputs from the following MutexLocker block: 1034 CompileTask* task = NULL; 1035 CompileQueue* queue = compile_queue(comp_level); 1036 1037 // Acquire our lock. 1038 { 1039 MutexLocker locker(MethodCompileQueue_lock, thread); 1040 1041 // Make sure the method has not slipped into the queues since 1042 // last we checked; note that those checks were "fast bail-outs". 1043 // Here we need to be more careful, see 14012000 below. 1044 if (compilation_is_in_queue(method)) { 1045 return; 1046 } 1047 1048 // We need to check again to see if the compilation has 1049 // completed. A previous compilation may have registered 1050 // some result. 1051 if (compilation_is_complete(method, osr_bci, comp_level)) { 1052 return; 1053 } 1054 1055 // We now know that this compilation is not pending, complete, 1056 // or prohibited. Assign a compile_id to this compilation 1057 // and check to see if it is in our [Start..Stop) range. 1058 int compile_id = assign_compile_id(method, osr_bci); 1059 if (compile_id == 0) { 1060 // The compilation falls outside the allowed range. 1061 return; 1062 } 1063 1064 #if INCLUDE_JVMCI 1065 if (UseJVMCICompiler && blocking) { 1066 // Don't allow blocking compiles for requests triggered by JVMCI. 1067 if (thread->is_Compiler_thread()) { 1068 blocking = false; 1069 } 1070 1071 if (!UseJVMCINativeLibrary) { 1072 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1073 vframeStream vfst((JavaThread*) thread); 1074 for (; !vfst.at_end(); vfst.next()) { 1075 if (vfst.method()->is_static_initializer() || 1076 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1077 vfst.method()->name() == vmSymbols::loadClass_name())) { 1078 blocking = false; 1079 break; 1080 } 1081 } 1082 } 1083 1084 // Don't allow blocking compilation requests to JVMCI 1085 // if JVMCI itself is not yet initialized 1086 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) { 1087 blocking = false; 1088 } 1089 1090 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1091 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1092 // such as the DestroyJavaVM thread. 1093 if (JVMCI::shutdown_called()) { 1094 blocking = false; 1095 } 1096 } 1097 #endif // INCLUDE_JVMCI 1098 1099 // We will enter the compilation in the queue. 1100 // 14012000: Note that this sets the queued_for_compile bits in 1101 // the target method. We can now reason that a method cannot be 1102 // queued for compilation more than once, as follows: 1103 // Before a thread queues a task for compilation, it first acquires 1104 // the compile queue lock, then checks if the method's queued bits 1105 // are set or it has already been compiled. Thus there can not be two 1106 // instances of a compilation task for the same method on the 1107 // compilation queue. Consider now the case where the compilation 1108 // thread has already removed a task for that method from the queue 1109 // and is in the midst of compiling it. In this case, the 1110 // queued_for_compile bits must be set in the method (and these 1111 // will be visible to the current thread, since the bits were set 1112 // under protection of the compile queue lock, which we hold now. 1113 // When the compilation completes, the compiler thread first sets 1114 // the compilation result and then clears the queued_for_compile 1115 // bits. Neither of these actions are protected by a barrier (or done 1116 // under the protection of a lock), so the only guarantee we have 1117 // (on machines with TSO (Total Store Order)) is that these values 1118 // will update in that order. As a result, the only combinations of 1119 // these bits that the current thread will see are, in temporal order: 1120 // <RESULT, QUEUE> : 1121 // <0, 1> : in compile queue, but not yet compiled 1122 // <1, 1> : compiled but queue bit not cleared 1123 // <1, 0> : compiled and queue bit cleared 1124 // Because we first check the queue bits then check the result bits, 1125 // we are assured that we cannot introduce a duplicate task. 1126 // Note that if we did the tests in the reverse order (i.e. check 1127 // result then check queued bit), we could get the result bit before 1128 // the compilation completed, and the queue bit after the compilation 1129 // completed, and end up introducing a "duplicate" (redundant) task. 1130 // In that case, the compiler thread should first check if a method 1131 // has already been compiled before trying to compile it. 1132 // NOTE: in the event that there are multiple compiler threads and 1133 // there is de-optimization/recompilation, things will get hairy, 1134 // and in that case it's best to protect both the testing (here) of 1135 // these bits, and their updating (here and elsewhere) under a 1136 // common lock. 1137 task = create_compile_task(queue, 1138 compile_id, method, 1139 osr_bci, comp_level, 1140 hot_method, hot_count, compile_reason, 1141 blocking); 1142 } 1143 1144 if (blocking) { 1145 wait_for_completion(task); 1146 } 1147 } 1148 1149 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1150 int comp_level, 1151 const methodHandle& hot_method, int hot_count, 1152 CompileTask::CompileReason compile_reason, 1153 Thread* THREAD) { 1154 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1155 if (!_initialized || comp_level == CompLevel_none) { 1156 return NULL; 1157 } 1158 1159 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1160 assert(comp != NULL, "Ensure we have a compiler"); 1161 1162 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1163 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1164 DirectivesStack::release(directive); 1165 return nm; 1166 } 1167 1168 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1169 int comp_level, 1170 const methodHandle& hot_method, int hot_count, 1171 CompileTask::CompileReason compile_reason, 1172 DirectiveSet* directive, 1173 Thread* THREAD) { 1174 1175 // make sure arguments make sense 1176 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1177 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1178 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1179 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1180 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1181 // allow any levels for WhiteBox 1182 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1183 // return quickly if possible 1184 1185 // lock, make sure that the compilation 1186 // isn't prohibited in a straightforward way. 1187 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1188 if (comp == NULL || !comp->can_compile_method(method) || 1189 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1190 return NULL; 1191 } 1192 1193 #if INCLUDE_JVMCI 1194 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) { 1195 return NULL; 1196 } 1197 #endif 1198 1199 if (osr_bci == InvocationEntryBci) { 1200 // standard compilation 1201 CompiledMethod* method_code = method->code(); 1202 if (method_code != NULL && method_code->is_nmethod()) { 1203 if (compilation_is_complete(method, osr_bci, comp_level)) { 1204 return (nmethod*) method_code; 1205 } 1206 } 1207 if (method->is_not_compilable(comp_level)) { 1208 return NULL; 1209 } 1210 } else { 1211 // osr compilation 1212 #ifndef TIERED 1213 // seems like an assert of dubious value 1214 assert(comp_level == CompLevel_highest_tier, 1215 "all OSR compiles are assumed to be at a single compilation level"); 1216 #endif // TIERED 1217 // We accept a higher level osr method 1218 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1219 if (nm != NULL) return nm; 1220 if (method->is_not_osr_compilable(comp_level)) return NULL; 1221 } 1222 1223 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1224 // some prerequisites that are compiler specific 1225 if (comp->is_c2()) { 1226 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1227 // Resolve all classes seen in the signature of the method 1228 // we are compiling. 1229 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1230 } 1231 1232 // If the method is native, do the lookup in the thread requesting 1233 // the compilation. Native lookups can load code, which is not 1234 // permitted during compilation. 1235 // 1236 // Note: A native method implies non-osr compilation which is 1237 // checked with an assertion at the entry of this method. 1238 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1239 bool in_base_library; 1240 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1241 if (HAS_PENDING_EXCEPTION) { 1242 // In case of an exception looking up the method, we just forget 1243 // about it. The interpreter will kick-in and throw the exception. 1244 method->set_not_compilable(); // implies is_not_osr_compilable() 1245 CLEAR_PENDING_EXCEPTION; 1246 return NULL; 1247 } 1248 assert(method->has_native_function(), "must have native code by now"); 1249 } 1250 1251 // RedefineClasses() has replaced this method; just return 1252 if (method->is_old()) { 1253 return NULL; 1254 } 1255 1256 // JVMTI -- post_compile_event requires jmethod_id() that may require 1257 // a lock the compiling thread can not acquire. Prefetch it here. 1258 if (JvmtiExport::should_post_compiled_method_load()) { 1259 method->jmethod_id(); 1260 } 1261 1262 // do the compilation 1263 if (method->is_native()) { 1264 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1265 // The following native methods: 1266 // 1267 // java.lang.Float.intBitsToFloat 1268 // java.lang.Float.floatToRawIntBits 1269 // java.lang.Double.longBitsToDouble 1270 // java.lang.Double.doubleToRawLongBits 1271 // 1272 // are called through the interpreter even if interpreter native stubs 1273 // are not preferred (i.e., calling through adapter handlers is preferred). 1274 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1275 // if the version of the methods from the native libraries is called. 1276 // As the interpreter and the C2-intrinsified version of the methods preserves 1277 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1278 if ((UseSSE >= 1 && 1279 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1280 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1281 (UseSSE >= 2 && 1282 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1283 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1284 return NULL; 1285 } 1286 1287 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1288 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1289 // 1290 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1291 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1292 AdapterHandlerLibrary::create_native_wrapper(method); 1293 } else { 1294 return NULL; 1295 } 1296 } else { 1297 // If the compiler is shut off due to code cache getting full 1298 // fail out now so blocking compiles dont hang the java thread 1299 if (!should_compile_new_jobs()) { 1300 CompilationPolicy::policy()->delay_compilation(method()); 1301 return NULL; 1302 } 1303 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles; 1304 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1305 } 1306 1307 // return requested nmethod 1308 // We accept a higher level osr method 1309 if (osr_bci == InvocationEntryBci) { 1310 CompiledMethod* code = method->code(); 1311 if (code == NULL) { 1312 return (nmethod*) code; 1313 } else { 1314 return code->as_nmethod_or_null(); 1315 } 1316 } 1317 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1318 } 1319 1320 1321 // ------------------------------------------------------------------ 1322 // CompileBroker::compilation_is_complete 1323 // 1324 // See if compilation of this method is already complete. 1325 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1326 int osr_bci, 1327 int comp_level) { 1328 bool is_osr = (osr_bci != standard_entry_bci); 1329 if (is_osr) { 1330 if (method->is_not_osr_compilable(comp_level)) { 1331 return true; 1332 } else { 1333 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1334 return (result != NULL); 1335 } 1336 } else { 1337 if (method->is_not_compilable(comp_level)) { 1338 return true; 1339 } else { 1340 CompiledMethod* result = method->code(); 1341 if (result == NULL) return false; 1342 return comp_level == result->comp_level(); 1343 } 1344 } 1345 } 1346 1347 1348 /** 1349 * See if this compilation is already requested. 1350 * 1351 * Implementation note: there is only a single "is in queue" bit 1352 * for each method. This means that the check below is overly 1353 * conservative in the sense that an osr compilation in the queue 1354 * will block a normal compilation from entering the queue (and vice 1355 * versa). This can be remedied by a full queue search to disambiguate 1356 * cases. If it is deemed profitable, this may be done. 1357 */ 1358 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1359 return method->queued_for_compilation(); 1360 } 1361 1362 // ------------------------------------------------------------------ 1363 // CompileBroker::compilation_is_prohibited 1364 // 1365 // See if this compilation is not allowed. 1366 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1367 bool is_native = method->is_native(); 1368 // Some compilers may not support the compilation of natives. 1369 AbstractCompiler *comp = compiler(comp_level); 1370 if (is_native && 1371 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1372 method->set_not_compilable_quietly(comp_level); 1373 return true; 1374 } 1375 1376 bool is_osr = (osr_bci != standard_entry_bci); 1377 // Some compilers may not support on stack replacement. 1378 if (is_osr && 1379 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1380 method->set_not_osr_compilable(comp_level); 1381 return true; 1382 } 1383 1384 // The method may be explicitly excluded by the user. 1385 double scale; 1386 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1387 bool quietly = CompilerOracle::should_exclude_quietly(); 1388 if (PrintCompilation && !quietly) { 1389 // This does not happen quietly... 1390 ResourceMark rm; 1391 tty->print("### Excluding %s:%s", 1392 method->is_native() ? "generation of native wrapper" : "compile", 1393 (method->is_static() ? " static" : "")); 1394 method->print_short_name(tty); 1395 tty->cr(); 1396 } 1397 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1398 } 1399 1400 return false; 1401 } 1402 1403 /** 1404 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1405 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1406 * The function also allows to generate separate compilation IDs for OSR compilations. 1407 */ 1408 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1409 #ifdef ASSERT 1410 bool is_osr = (osr_bci != standard_entry_bci); 1411 int id; 1412 if (method->is_native()) { 1413 assert(!is_osr, "can't be osr"); 1414 // Adapters, native wrappers and method handle intrinsics 1415 // should be generated always. 1416 return Atomic::add(1, &_compilation_id); 1417 } else if (CICountOSR && is_osr) { 1418 id = Atomic::add(1, &_osr_compilation_id); 1419 if (CIStartOSR <= id && id < CIStopOSR) { 1420 return id; 1421 } 1422 } else { 1423 id = Atomic::add(1, &_compilation_id); 1424 if (CIStart <= id && id < CIStop) { 1425 return id; 1426 } 1427 } 1428 1429 // Method was not in the appropriate compilation range. 1430 method->set_not_compilable_quietly(); 1431 return 0; 1432 #else 1433 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1434 // only _compilation_id is incremented. 1435 return Atomic::add(1, &_compilation_id); 1436 #endif 1437 } 1438 1439 // ------------------------------------------------------------------ 1440 // CompileBroker::assign_compile_id_unlocked 1441 // 1442 // Public wrapper for assign_compile_id that acquires the needed locks 1443 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1444 MutexLocker locker(MethodCompileQueue_lock, thread); 1445 return assign_compile_id(method, osr_bci); 1446 } 1447 1448 // ------------------------------------------------------------------ 1449 // CompileBroker::preload_classes 1450 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1451 // Move this code over from c1_Compiler.cpp 1452 ShouldNotReachHere(); 1453 } 1454 1455 1456 // ------------------------------------------------------------------ 1457 // CompileBroker::create_compile_task 1458 // 1459 // Create a CompileTask object representing the current request for 1460 // compilation. Add this task to the queue. 1461 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1462 int compile_id, 1463 const methodHandle& method, 1464 int osr_bci, 1465 int comp_level, 1466 const methodHandle& hot_method, 1467 int hot_count, 1468 CompileTask::CompileReason compile_reason, 1469 bool blocking) { 1470 CompileTask* new_task = CompileTask::allocate(); 1471 new_task->initialize(compile_id, method, osr_bci, comp_level, 1472 hot_method, hot_count, compile_reason, 1473 blocking); 1474 queue->add(new_task); 1475 return new_task; 1476 } 1477 1478 #if INCLUDE_JVMCI 1479 // The number of milliseconds to wait before checking if 1480 // JVMCI compilation has made progress. 1481 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1482 1483 // The number of JVMCI compilation progress checks that must fail 1484 // before unblocking a thread waiting for a blocking compilation. 1485 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1486 1487 /** 1488 * Waits for a JVMCI compiler to complete a given task. This thread 1489 * waits until either the task completes or it sees no JVMCI compilation 1490 * progress for N consecutive milliseconds where N is 1491 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1492 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1493 * 1494 * @return true if this thread needs to free/recycle the task 1495 */ 1496 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1497 MonitorLocker ml(task->lock(), thread); 1498 int progress_wait_attempts = 0; 1499 int methods_compiled = jvmci->methods_compiled(); 1500 while (!task->is_complete() && !is_compilation_disabled_forever() && 1501 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1502 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1503 1504 bool progress; 1505 if (jvmci_compiler_thread != NULL) { 1506 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress. 1507 progress = jvmci_compiler_thread->thread_state() != _thread_blocked && 1508 !jvmci_compiler_thread->is_external_suspend(); 1509 } else { 1510 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1511 // that all JVMCI compiler threads are blocked on. We use the counter for 1512 // successful JVMCI compilations to determine whether JVMCI compilation 1513 // is still making progress through the JVMCI compiler queue. 1514 progress = jvmci->methods_compiled() != methods_compiled; 1515 } 1516 1517 if (!progress) { 1518 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1519 if (PrintCompilation) { 1520 task->print(tty, "wait for blocking compilation timed out"); 1521 } 1522 break; 1523 } 1524 } else { 1525 progress_wait_attempts = 0; 1526 if (jvmci_compiler_thread == NULL) { 1527 methods_compiled = jvmci->methods_compiled(); 1528 } 1529 } 1530 } 1531 task->clear_waiter(); 1532 return task->is_complete(); 1533 } 1534 #endif 1535 1536 /** 1537 * Wait for the compilation task to complete. 1538 */ 1539 void CompileBroker::wait_for_completion(CompileTask* task) { 1540 if (CIPrintCompileQueue) { 1541 ttyLocker ttyl; 1542 tty->print_cr("BLOCKING FOR COMPILE"); 1543 } 1544 1545 assert(task->is_blocking(), "can only wait on blocking task"); 1546 1547 JavaThread* thread = JavaThread::current(); 1548 thread->set_blocked_on_compilation(true); 1549 1550 methodHandle method(thread, task->method()); 1551 bool free_task; 1552 #if INCLUDE_JVMCI 1553 AbstractCompiler* comp = compiler(task->comp_level()); 1554 if (comp->is_jvmci()) { 1555 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1556 } else 1557 #endif 1558 { 1559 MonitorLocker ml(task->lock(), thread); 1560 free_task = true; 1561 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1562 ml.wait(); 1563 } 1564 } 1565 1566 thread->set_blocked_on_compilation(false); 1567 if (free_task) { 1568 if (is_compilation_disabled_forever()) { 1569 CompileTask::free(task); 1570 return; 1571 } 1572 1573 // It is harmless to check this status without the lock, because 1574 // completion is a stable property (until the task object is recycled). 1575 assert(task->is_complete(), "Compilation should have completed"); 1576 assert(task->code_handle() == NULL, "must be reset"); 1577 1578 // By convention, the waiter is responsible for recycling a 1579 // blocking CompileTask. Since there is only one waiter ever 1580 // waiting on a CompileTask, we know that no one else will 1581 // be using this CompileTask; we can free it. 1582 CompileTask::free(task); 1583 } 1584 } 1585 1586 /** 1587 * Initialize compiler thread(s) + compiler object(s). The postcondition 1588 * of this function is that the compiler runtimes are initialized and that 1589 * compiler threads can start compiling. 1590 */ 1591 bool CompileBroker::init_compiler_runtime() { 1592 CompilerThread* thread = CompilerThread::current(); 1593 AbstractCompiler* comp = thread->compiler(); 1594 // Final sanity check - the compiler object must exist 1595 guarantee(comp != NULL, "Compiler object must exist"); 1596 1597 int system_dictionary_modification_counter; 1598 { 1599 MutexLocker locker(Compile_lock, thread); 1600 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1601 } 1602 1603 { 1604 // Must switch to native to allocate ci_env 1605 ThreadToNativeFromVM ttn(thread); 1606 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1607 // Cache Jvmti state 1608 ci_env.cache_jvmti_state(); 1609 // Cache DTrace flags 1610 ci_env.cache_dtrace_flags(); 1611 1612 // Switch back to VM state to do compiler initialization 1613 ThreadInVMfromNative tv(thread); 1614 ResetNoHandleMark rnhm; 1615 1616 // Perform per-thread and global initializations 1617 comp->initialize(); 1618 } 1619 1620 if (comp->is_failed()) { 1621 disable_compilation_forever(); 1622 // If compiler initialization failed, no compiler thread that is specific to a 1623 // particular compiler runtime will ever start to compile methods. 1624 shutdown_compiler_runtime(comp, thread); 1625 return false; 1626 } 1627 1628 // C1 specific check 1629 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1630 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1631 return false; 1632 } 1633 1634 return true; 1635 } 1636 1637 /** 1638 * If C1 and/or C2 initialization failed, we shut down all compilation. 1639 * We do this to keep things simple. This can be changed if it ever turns 1640 * out to be a problem. 1641 */ 1642 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1643 // Free buffer blob, if allocated 1644 if (thread->get_buffer_blob() != NULL) { 1645 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1646 CodeCache::free(thread->get_buffer_blob()); 1647 } 1648 1649 if (comp->should_perform_shutdown()) { 1650 // There are two reasons for shutting down the compiler 1651 // 1) compiler runtime initialization failed 1652 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1653 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1654 1655 // Only one thread per compiler runtime object enters here 1656 // Set state to shut down 1657 comp->set_shut_down(); 1658 1659 // Delete all queued compilation tasks to make compiler threads exit faster. 1660 if (_c1_compile_queue != NULL) { 1661 _c1_compile_queue->free_all(); 1662 } 1663 1664 if (_c2_compile_queue != NULL) { 1665 _c2_compile_queue->free_all(); 1666 } 1667 1668 // Set flags so that we continue execution with using interpreter only. 1669 UseCompiler = false; 1670 UseInterpreter = true; 1671 1672 // We could delete compiler runtimes also. However, there are references to 1673 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1674 // fail. This can be done later if necessary. 1675 } 1676 } 1677 1678 /** 1679 * Helper function to create new or reuse old CompileLog. 1680 */ 1681 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1682 if (!LogCompilation) return NULL; 1683 1684 AbstractCompiler *compiler = ct->compiler(); 1685 bool c1 = compiler->is_c1(); 1686 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1687 assert(compiler_objects != NULL, "must be initialized at this point"); 1688 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1689 assert(logs != NULL, "must be initialized at this point"); 1690 int count = c1 ? _c1_count : _c2_count; 1691 1692 // Find Compiler number by its threadObj. 1693 oop compiler_obj = ct->threadObj(); 1694 int compiler_number = 0; 1695 bool found = false; 1696 for (; compiler_number < count; compiler_number++) { 1697 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) { 1698 found = true; 1699 break; 1700 } 1701 } 1702 assert(found, "Compiler must exist at this point"); 1703 1704 // Determine pointer for this thread's log. 1705 CompileLog** log_ptr = &logs[compiler_number]; 1706 1707 // Return old one if it exists. 1708 CompileLog* log = *log_ptr; 1709 if (log != NULL) { 1710 ct->init_log(log); 1711 return log; 1712 } 1713 1714 // Create a new one and remember it. 1715 init_compiler_thread_log(); 1716 log = ct->log(); 1717 *log_ptr = log; 1718 return log; 1719 } 1720 1721 // ------------------------------------------------------------------ 1722 // CompileBroker::compiler_thread_loop 1723 // 1724 // The main loop run by a CompilerThread. 1725 void CompileBroker::compiler_thread_loop() { 1726 CompilerThread* thread = CompilerThread::current(); 1727 CompileQueue* queue = thread->queue(); 1728 // For the thread that initializes the ciObjectFactory 1729 // this resource mark holds all the shared objects 1730 ResourceMark rm; 1731 1732 // First thread to get here will initialize the compiler interface 1733 1734 { 1735 ASSERT_IN_VM; 1736 MutexLocker only_one (CompileThread_lock, thread); 1737 if (!ciObjectFactory::is_initialized()) { 1738 ciObjectFactory::initialize(); 1739 } 1740 } 1741 1742 // Open a log. 1743 CompileLog* log = get_log(thread); 1744 if (log != NULL) { 1745 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1746 thread->name(), 1747 os::current_thread_id(), 1748 os::current_process_id()); 1749 log->stamp(); 1750 log->end_elem(); 1751 } 1752 1753 // If compiler thread/runtime initialization fails, exit the compiler thread 1754 if (!init_compiler_runtime()) { 1755 return; 1756 } 1757 1758 thread->start_idle_timer(); 1759 1760 // Poll for new compilation tasks as long as the JVM runs. Compilation 1761 // should only be disabled if something went wrong while initializing the 1762 // compiler runtimes. This, in turn, should not happen. The only known case 1763 // when compiler runtime initialization fails is if there is not enough free 1764 // space in the code cache to generate the necessary stubs, etc. 1765 while (!is_compilation_disabled_forever()) { 1766 // We need this HandleMark to avoid leaking VM handles. 1767 HandleMark hm(thread); 1768 1769 CompileTask* task = queue->get(); 1770 if (task == NULL) { 1771 if (UseDynamicNumberOfCompilerThreads) { 1772 // Access compiler_count under lock to enforce consistency. 1773 MutexLocker only_one(CompileThread_lock); 1774 if (can_remove(thread, true)) { 1775 if (TraceCompilerThreads) { 1776 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1777 thread->name(), thread->idle_time_millis()); 1778 } 1779 // Free buffer blob, if allocated 1780 if (thread->get_buffer_blob() != NULL) { 1781 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1782 CodeCache::free(thread->get_buffer_blob()); 1783 } 1784 return; // Stop this thread. 1785 } 1786 } 1787 } else { 1788 // Assign the task to the current thread. Mark this compilation 1789 // thread as active for the profiler. 1790 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition 1791 // occurs after fetching the compile task off the queue. 1792 CompileTaskWrapper ctw(task); 1793 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1794 task->set_code_handle(&result_handle); 1795 methodHandle method(thread, task->method()); 1796 1797 // Never compile a method if breakpoints are present in it 1798 if (method()->number_of_breakpoints() == 0) { 1799 // Compile the method. 1800 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1801 invoke_compiler_on_method(task); 1802 thread->start_idle_timer(); 1803 } else { 1804 // After compilation is disabled, remove remaining methods from queue 1805 method->clear_queued_for_compilation(); 1806 task->set_failure_reason("compilation is disabled"); 1807 } 1808 } 1809 1810 if (UseDynamicNumberOfCompilerThreads) { 1811 possibly_add_compiler_threads(); 1812 } 1813 } 1814 } 1815 1816 // Shut down compiler runtime 1817 shutdown_compiler_runtime(thread->compiler(), thread); 1818 } 1819 1820 // ------------------------------------------------------------------ 1821 // CompileBroker::init_compiler_thread_log 1822 // 1823 // Set up state required by +LogCompilation. 1824 void CompileBroker::init_compiler_thread_log() { 1825 CompilerThread* thread = CompilerThread::current(); 1826 char file_name[4*K]; 1827 FILE* fp = NULL; 1828 intx thread_id = os::current_thread_id(); 1829 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1830 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1831 if (dir == NULL) { 1832 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1833 thread_id, os::current_process_id()); 1834 } else { 1835 jio_snprintf(file_name, sizeof(file_name), 1836 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1837 os::file_separator(), thread_id, os::current_process_id()); 1838 } 1839 1840 fp = fopen(file_name, "wt"); 1841 if (fp != NULL) { 1842 if (LogCompilation && Verbose) { 1843 tty->print_cr("Opening compilation log %s", file_name); 1844 } 1845 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1846 if (log == NULL) { 1847 fclose(fp); 1848 return; 1849 } 1850 thread->init_log(log); 1851 1852 if (xtty != NULL) { 1853 ttyLocker ttyl; 1854 // Record any per thread log files 1855 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1856 } 1857 return; 1858 } 1859 } 1860 warning("Cannot open log file: %s", file_name); 1861 } 1862 1863 void CompileBroker::log_metaspace_failure() { 1864 const char* message = "some methods may not be compiled because metaspace " 1865 "is out of memory"; 1866 if (_compilation_log != NULL) { 1867 _compilation_log->log_metaspace_failure(message); 1868 } 1869 if (PrintCompilation) { 1870 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1871 } 1872 } 1873 1874 1875 // ------------------------------------------------------------------ 1876 // CompileBroker::set_should_block 1877 // 1878 // Set _should_block. 1879 // Call this from the VM, with Threads_lock held and a safepoint requested. 1880 void CompileBroker::set_should_block() { 1881 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1882 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1883 #ifndef PRODUCT 1884 if (PrintCompilation && (Verbose || WizardMode)) 1885 tty->print_cr("notifying compiler thread pool to block"); 1886 #endif 1887 _should_block = true; 1888 } 1889 1890 // ------------------------------------------------------------------ 1891 // CompileBroker::maybe_block 1892 // 1893 // Call this from the compiler at convenient points, to poll for _should_block. 1894 void CompileBroker::maybe_block() { 1895 if (_should_block) { 1896 #ifndef PRODUCT 1897 if (PrintCompilation && (Verbose || WizardMode)) 1898 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1899 #endif 1900 ThreadInVMfromNative tivfn(JavaThread::current()); 1901 } 1902 } 1903 1904 // wrapper for CodeCache::print_summary() 1905 static void codecache_print(bool detailed) 1906 { 1907 ResourceMark rm; 1908 stringStream s; 1909 // Dump code cache into a buffer before locking the tty, 1910 { 1911 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1912 CodeCache::print_summary(&s, detailed); 1913 } 1914 ttyLocker ttyl; 1915 tty->print("%s", s.as_string()); 1916 } 1917 1918 // wrapper for CodeCache::print_summary() using outputStream 1919 static void codecache_print(outputStream* out, bool detailed) { 1920 ResourceMark rm; 1921 stringStream s; 1922 1923 // Dump code cache into a buffer 1924 { 1925 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1926 CodeCache::print_summary(&s, detailed); 1927 } 1928 1929 char* remaining_log = s.as_string(); 1930 while (*remaining_log != '\0') { 1931 char* eol = strchr(remaining_log, '\n'); 1932 if (eol == NULL) { 1933 out->print_cr("%s", remaining_log); 1934 remaining_log = remaining_log + strlen(remaining_log); 1935 } else { 1936 *eol = '\0'; 1937 out->print_cr("%s", remaining_log); 1938 remaining_log = eol + 1; 1939 } 1940 } 1941 } 1942 1943 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env, 1944 int compilable, const char* failure_reason) { 1945 if (success) { 1946 task->mark_success(); 1947 if (ci_env != NULL) { 1948 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1949 } 1950 if (_compilation_log != NULL) { 1951 nmethod* code = task->code(); 1952 if (code != NULL) { 1953 _compilation_log->log_nmethod(thread, code); 1954 } 1955 } 1956 } else if (AbortVMOnCompilationFailure) { 1957 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1958 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason); 1959 } 1960 if (compilable == ciEnv::MethodCompilable_never) { 1961 fatal("Never compilable: %s", failure_reason); 1962 } 1963 } 1964 // simulate crash during compilation 1965 assert(task->compile_id() != CICrashAt, "just as planned"); 1966 } 1967 1968 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 1969 assert(event != NULL, "invariant"); 1970 assert(event->should_commit(), "invariant"); 1971 event->set_method(task->method()); 1972 event->set_compileId(task->compile_id()); 1973 event->set_compileLevel(task->comp_level()); 1974 event->set_succeded(task->is_success()); 1975 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1976 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1977 event->set_inlinedBytes(task->num_inlined_bytecodes()); 1978 event->commit(); 1979 } 1980 1981 int DirectivesStack::_depth = 0; 1982 CompilerDirectives* DirectivesStack::_top = NULL; 1983 CompilerDirectives* DirectivesStack::_bottom = NULL; 1984 1985 // ------------------------------------------------------------------ 1986 // CompileBroker::invoke_compiler_on_method 1987 // 1988 // Compile a method. 1989 // 1990 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1991 task->print_ul(); 1992 if (PrintCompilation) { 1993 ResourceMark rm; 1994 task->print_tty(); 1995 } 1996 elapsedTimer time; 1997 1998 CompilerThread* thread = CompilerThread::current(); 1999 ResourceMark rm(thread); 2000 2001 if (LogEvents) { 2002 _compilation_log->log_compile(thread, task); 2003 } 2004 2005 // Common flags. 2006 uint compile_id = task->compile_id(); 2007 int osr_bci = task->osr_bci(); 2008 bool is_osr = (osr_bci != standard_entry_bci); 2009 bool should_log = (thread->log() != NULL); 2010 bool should_break = false; 2011 const int task_level = task->comp_level(); 2012 AbstractCompiler* comp = task->compiler(); 2013 2014 DirectiveSet* directive; 2015 { 2016 // create the handle inside it's own block so it can't 2017 // accidentally be referenced once the thread transitions to 2018 // native. The NoHandleMark before the transition should catch 2019 // any cases where this occurs in the future. 2020 methodHandle method(thread, task->method()); 2021 assert(!method->is_native(), "no longer compile natives"); 2022 2023 // Look up matching directives 2024 directive = DirectivesStack::getMatchingDirective(method, comp); 2025 2026 // Update compile information when using perfdata. 2027 if (UsePerfData) { 2028 update_compile_perf_data(thread, method, is_osr); 2029 } 2030 2031 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2032 } 2033 2034 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2035 if (should_log && !directive->LogOption) { 2036 should_log = false; 2037 } 2038 2039 // Allocate a new set of JNI handles. 2040 push_jni_handle_block(); 2041 Method* target_handle = task->method(); 2042 int compilable = ciEnv::MethodCompilable; 2043 const char* failure_reason = NULL; 2044 bool failure_reason_on_C_heap = false; 2045 const char* retry_message = NULL; 2046 2047 int system_dictionary_modification_counter; 2048 { 2049 MutexLocker locker(Compile_lock, thread); 2050 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 2051 } 2052 2053 #if INCLUDE_JVMCI 2054 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2055 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2056 2057 TraceTime t1("compilation", &time); 2058 EventCompilation event; 2059 2060 // Skip redefined methods 2061 if (target_handle->is_old()) { 2062 failure_reason = "redefined method"; 2063 retry_message = "not retryable"; 2064 compilable = ciEnv::MethodCompilable_never; 2065 } else { 2066 JVMCICompileState compile_state(task, system_dictionary_modification_counter); 2067 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__); 2068 methodHandle method(thread, target_handle); 2069 env.runtime()->compile_method(&env, jvmci, method, osr_bci); 2070 2071 failure_reason = compile_state.failure_reason(); 2072 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap(); 2073 if (!compile_state.retryable()) { 2074 retry_message = "not retryable"; 2075 compilable = ciEnv::MethodCompilable_not_at_tier; 2076 } 2077 if (task->code() == NULL) { 2078 assert(failure_reason != NULL, "must specify failure_reason"); 2079 } 2080 } 2081 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason); 2082 if (event.should_commit()) { 2083 post_compilation_event(&event, task); 2084 } 2085 2086 } else 2087 #endif // INCLUDE_JVMCI 2088 { 2089 NoHandleMark nhm; 2090 ThreadToNativeFromVM ttn(thread); 2091 2092 ciEnv ci_env(task, system_dictionary_modification_counter); 2093 if (should_break) { 2094 ci_env.set_break_at_compile(true); 2095 } 2096 if (should_log) { 2097 ci_env.set_log(thread->log()); 2098 } 2099 assert(thread->env() == &ci_env, "set by ci_env"); 2100 // The thread-env() field is cleared in ~CompileTaskWrapper. 2101 2102 // Cache Jvmti state 2103 ci_env.cache_jvmti_state(); 2104 2105 // Cache DTrace flags 2106 ci_env.cache_dtrace_flags(); 2107 2108 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2109 2110 TraceTime t1("compilation", &time); 2111 EventCompilation event; 2112 2113 if (comp == NULL) { 2114 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2115 } else { 2116 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2117 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2118 while (WhiteBox::compilation_locked) { 2119 locker.wait(); 2120 } 2121 } 2122 comp->compile_method(&ci_env, target, osr_bci, directive); 2123 } 2124 2125 if (!ci_env.failing() && task->code() == NULL) { 2126 //assert(false, "compiler should always document failure"); 2127 // The compiler elected, without comment, not to register a result. 2128 // Do not attempt further compilations of this method. 2129 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2130 } 2131 2132 // Copy this bit to the enclosing block: 2133 compilable = ci_env.compilable(); 2134 2135 if (ci_env.failing()) { 2136 failure_reason = ci_env.failure_reason(); 2137 retry_message = ci_env.retry_message(); 2138 ci_env.report_failure(failure_reason); 2139 } 2140 2141 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason); 2142 if (event.should_commit()) { 2143 post_compilation_event(&event, task); 2144 } 2145 } 2146 // Remove the JNI handle block after the ciEnv destructor has run in 2147 // the previous block. 2148 pop_jni_handle_block(); 2149 2150 if (failure_reason != NULL) { 2151 task->set_failure_reason(failure_reason, failure_reason_on_C_heap); 2152 if (_compilation_log != NULL) { 2153 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2154 } 2155 if (PrintCompilation) { 2156 FormatBufferResource msg = retry_message != NULL ? 2157 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2158 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2159 task->print(tty, msg); 2160 } 2161 } 2162 2163 methodHandle method(thread, task->method()); 2164 2165 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2166 2167 collect_statistics(thread, time, task); 2168 2169 nmethod* nm = task->code(); 2170 if (nm != NULL) { 2171 nm->maybe_print_nmethod(directive); 2172 } 2173 DirectivesStack::release(directive); 2174 2175 if (PrintCompilation && PrintCompilation2) { 2176 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2177 tty->print("%4d ", compile_id); // print compilation number 2178 tty->print("%s ", (is_osr ? "%" : " ")); 2179 if (task->code() != NULL) { 2180 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2181 } 2182 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2183 } 2184 2185 Log(compilation, codecache) log; 2186 if (log.is_debug()) { 2187 LogStream ls(log.debug()); 2188 codecache_print(&ls, /* detailed= */ false); 2189 } 2190 if (PrintCodeCacheOnCompilation) { 2191 codecache_print(/* detailed= */ false); 2192 } 2193 // Disable compilation, if required. 2194 switch (compilable) { 2195 case ciEnv::MethodCompilable_never: 2196 if (is_osr) 2197 method->set_not_osr_compilable_quietly(); 2198 else 2199 method->set_not_compilable_quietly(); 2200 break; 2201 case ciEnv::MethodCompilable_not_at_tier: 2202 if (is_osr) 2203 method->set_not_osr_compilable_quietly(task_level); 2204 else 2205 method->set_not_compilable_quietly(task_level); 2206 break; 2207 } 2208 2209 // Note that the queued_for_compilation bits are cleared without 2210 // protection of a mutex. [They were set by the requester thread, 2211 // when adding the task to the compile queue -- at which time the 2212 // compile queue lock was held. Subsequently, we acquired the compile 2213 // queue lock to get this task off the compile queue; thus (to belabour 2214 // the point somewhat) our clearing of the bits must be occurring 2215 // only after the setting of the bits. See also 14012000 above. 2216 method->clear_queued_for_compilation(); 2217 } 2218 2219 /** 2220 * The CodeCache is full. Print warning and disable compilation. 2221 * Schedule code cache cleaning so compilation can continue later. 2222 * This function needs to be called only from CodeCache::allocate(), 2223 * since we currently handle a full code cache uniformly. 2224 */ 2225 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2226 UseInterpreter = true; 2227 if (UseCompiler || AlwaysCompileLoopMethods ) { 2228 if (xtty != NULL) { 2229 ResourceMark rm; 2230 stringStream s; 2231 // Dump code cache state into a buffer before locking the tty, 2232 // because log_state() will use locks causing lock conflicts. 2233 CodeCache::log_state(&s); 2234 // Lock to prevent tearing 2235 ttyLocker ttyl; 2236 xtty->begin_elem("code_cache_full"); 2237 xtty->print("%s", s.as_string()); 2238 xtty->stamp(); 2239 xtty->end_elem(); 2240 } 2241 2242 #ifndef PRODUCT 2243 if (ExitOnFullCodeCache) { 2244 codecache_print(/* detailed= */ true); 2245 before_exit(JavaThread::current()); 2246 exit_globals(); // will delete tty 2247 vm_direct_exit(1); 2248 } 2249 #endif 2250 if (UseCodeCacheFlushing) { 2251 // Since code cache is full, immediately stop new compiles 2252 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2253 NMethodSweeper::log_sweep("disable_compiler"); 2254 } 2255 } else { 2256 disable_compilation_forever(); 2257 } 2258 2259 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2260 } 2261 } 2262 2263 // ------------------------------------------------------------------ 2264 // CompileBroker::update_compile_perf_data 2265 // 2266 // Record this compilation for debugging purposes. 2267 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) { 2268 ResourceMark rm; 2269 char* method_name = method->name()->as_C_string(); 2270 char current_method[CompilerCounters::cmname_buffer_length]; 2271 size_t maxLen = CompilerCounters::cmname_buffer_length; 2272 2273 const char* class_name = method->method_holder()->name()->as_C_string(); 2274 2275 size_t s1len = strlen(class_name); 2276 size_t s2len = strlen(method_name); 2277 2278 // check if we need to truncate the string 2279 if (s1len + s2len + 2 > maxLen) { 2280 2281 // the strategy is to lop off the leading characters of the 2282 // class name and the trailing characters of the method name. 2283 2284 if (s2len + 2 > maxLen) { 2285 // lop of the entire class name string, let snprintf handle 2286 // truncation of the method name. 2287 class_name += s1len; // null string 2288 } 2289 else { 2290 // lop off the extra characters from the front of the class name 2291 class_name += ((s1len + s2len + 2) - maxLen); 2292 } 2293 } 2294 2295 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2296 2297 int last_compile_type = normal_compile; 2298 if (CICountOSR && is_osr) { 2299 last_compile_type = osr_compile; 2300 } 2301 2302 CompilerCounters* counters = thread->counters(); 2303 counters->set_current_method(current_method); 2304 counters->set_compile_type((jlong) last_compile_type); 2305 } 2306 2307 // ------------------------------------------------------------------ 2308 // CompileBroker::push_jni_handle_block 2309 // 2310 // Push on a new block of JNI handles. 2311 void CompileBroker::push_jni_handle_block() { 2312 JavaThread* thread = JavaThread::current(); 2313 2314 // Allocate a new block for JNI handles. 2315 // Inlined code from jni_PushLocalFrame() 2316 JNIHandleBlock* java_handles = thread->active_handles(); 2317 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2318 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2319 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2320 thread->set_active_handles(compile_handles); 2321 } 2322 2323 2324 // ------------------------------------------------------------------ 2325 // CompileBroker::pop_jni_handle_block 2326 // 2327 // Pop off the current block of JNI handles. 2328 void CompileBroker::pop_jni_handle_block() { 2329 JavaThread* thread = JavaThread::current(); 2330 2331 // Release our JNI handle block 2332 JNIHandleBlock* compile_handles = thread->active_handles(); 2333 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2334 thread->set_active_handles(java_handles); 2335 compile_handles->set_pop_frame_link(NULL); 2336 JNIHandleBlock::release_block(compile_handles, thread); // may block 2337 } 2338 2339 // ------------------------------------------------------------------ 2340 // CompileBroker::collect_statistics 2341 // 2342 // Collect statistics about the compilation. 2343 2344 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2345 bool success = task->is_success(); 2346 methodHandle method (thread, task->method()); 2347 uint compile_id = task->compile_id(); 2348 bool is_osr = (task->osr_bci() != standard_entry_bci); 2349 nmethod* code = task->code(); 2350 CompilerCounters* counters = thread->counters(); 2351 2352 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2353 MutexLocker locker(CompileStatistics_lock); 2354 2355 // _perf variables are production performance counters which are 2356 // updated regardless of the setting of the CITime and CITimeEach flags 2357 // 2358 2359 // account all time, including bailouts and failures in this counter; 2360 // C1 and C2 counters are counting both successful and unsuccessful compiles 2361 _t_total_compilation.add(time); 2362 2363 if (!success) { 2364 _total_bailout_count++; 2365 if (UsePerfData) { 2366 _perf_last_failed_method->set_value(counters->current_method()); 2367 _perf_last_failed_type->set_value(counters->compile_type()); 2368 _perf_total_bailout_count->inc(); 2369 } 2370 _t_bailedout_compilation.add(time); 2371 } else if (code == NULL) { 2372 if (UsePerfData) { 2373 _perf_last_invalidated_method->set_value(counters->current_method()); 2374 _perf_last_invalidated_type->set_value(counters->compile_type()); 2375 _perf_total_invalidated_count->inc(); 2376 } 2377 _total_invalidated_count++; 2378 _t_invalidated_compilation.add(time); 2379 } else { 2380 // Compilation succeeded 2381 2382 // update compilation ticks - used by the implementation of 2383 // java.lang.management.CompilationMBean 2384 _perf_total_compilation->inc(time.ticks()); 2385 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2386 2387 if (CITime) { 2388 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2389 if (is_osr) { 2390 _t_osr_compilation.add(time); 2391 _sum_osr_bytes_compiled += bytes_compiled; 2392 } else { 2393 _t_standard_compilation.add(time); 2394 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2395 } 2396 2397 #if INCLUDE_JVMCI 2398 AbstractCompiler* comp = compiler(task->comp_level()); 2399 if (comp) { 2400 CompilerStatistics* stats = comp->stats(); 2401 if (stats) { 2402 if (is_osr) { 2403 stats->_osr.update(time, bytes_compiled); 2404 } else { 2405 stats->_standard.update(time, bytes_compiled); 2406 } 2407 stats->_nmethods_size += code->total_size(); 2408 stats->_nmethods_code_size += code->insts_size(); 2409 } else { // if (!stats) 2410 assert(false, "Compiler statistics object must exist"); 2411 } 2412 } else { // if (!comp) 2413 assert(false, "Compiler object must exist"); 2414 } 2415 #endif // INCLUDE_JVMCI 2416 } 2417 2418 if (UsePerfData) { 2419 // save the name of the last method compiled 2420 _perf_last_method->set_value(counters->current_method()); 2421 _perf_last_compile_type->set_value(counters->compile_type()); 2422 _perf_last_compile_size->set_value(method->code_size() + 2423 task->num_inlined_bytecodes()); 2424 if (is_osr) { 2425 _perf_osr_compilation->inc(time.ticks()); 2426 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2427 } else { 2428 _perf_standard_compilation->inc(time.ticks()); 2429 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2430 } 2431 } 2432 2433 if (CITimeEach) { 2434 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2435 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2436 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2437 } 2438 2439 // Collect counts of successful compilations 2440 _sum_nmethod_size += code->total_size(); 2441 _sum_nmethod_code_size += code->insts_size(); 2442 _total_compile_count++; 2443 2444 if (UsePerfData) { 2445 _perf_sum_nmethod_size->inc( code->total_size()); 2446 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2447 _perf_total_compile_count->inc(); 2448 } 2449 2450 if (is_osr) { 2451 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2452 _total_osr_compile_count++; 2453 } else { 2454 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2455 _total_standard_compile_count++; 2456 } 2457 } 2458 // set the current method for the thread to null 2459 if (UsePerfData) counters->set_current_method(""); 2460 } 2461 2462 const char* CompileBroker::compiler_name(int comp_level) { 2463 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2464 if (comp == NULL) { 2465 return "no compiler"; 2466 } else { 2467 return (comp->name()); 2468 } 2469 } 2470 2471 #if INCLUDE_JVMCI 2472 void CompileBroker::print_times(AbstractCompiler* comp) { 2473 CompilerStatistics* stats = comp->stats(); 2474 if (stats) { 2475 tty->print_cr(" %s {speed: %d bytes/s; standard: %6.3f s, %d bytes, %d methods; osr: %6.3f s, %d bytes, %d methods; nmethods_size: %d bytes; nmethods_code_size: %d bytes}", 2476 comp->name(), stats->bytes_per_second(), 2477 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2478 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2479 stats->_nmethods_size, stats->_nmethods_code_size); 2480 } else { // if (!stats) 2481 assert(false, "Compiler statistics object must exist"); 2482 } 2483 comp->print_timers(); 2484 } 2485 #endif // INCLUDE_JVMCI 2486 2487 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2488 #if INCLUDE_JVMCI 2489 elapsedTimer standard_compilation; 2490 elapsedTimer total_compilation; 2491 elapsedTimer osr_compilation; 2492 2493 int standard_bytes_compiled = 0; 2494 int osr_bytes_compiled = 0; 2495 2496 int standard_compile_count = 0; 2497 int osr_compile_count = 0; 2498 int total_compile_count = 0; 2499 2500 int nmethods_size = 0; 2501 int nmethods_code_size = 0; 2502 bool printedHeader = false; 2503 2504 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2505 AbstractCompiler* comp = _compilers[i]; 2506 if (comp != NULL) { 2507 if (per_compiler && aggregate && !printedHeader) { 2508 printedHeader = true; 2509 tty->cr(); 2510 tty->print_cr("Individual compiler times (for compiled methods only)"); 2511 tty->print_cr("------------------------------------------------"); 2512 tty->cr(); 2513 } 2514 CompilerStatistics* stats = comp->stats(); 2515 2516 if (stats) { 2517 standard_compilation.add(stats->_standard._time); 2518 osr_compilation.add(stats->_osr._time); 2519 2520 standard_bytes_compiled += stats->_standard._bytes; 2521 osr_bytes_compiled += stats->_osr._bytes; 2522 2523 standard_compile_count += stats->_standard._count; 2524 osr_compile_count += stats->_osr._count; 2525 2526 nmethods_size += stats->_nmethods_size; 2527 nmethods_code_size += stats->_nmethods_code_size; 2528 } else { // if (!stats) 2529 assert(false, "Compiler statistics object must exist"); 2530 } 2531 2532 if (per_compiler) { 2533 print_times(comp); 2534 } 2535 } 2536 } 2537 total_compile_count = osr_compile_count + standard_compile_count; 2538 total_compilation.add(osr_compilation); 2539 total_compilation.add(standard_compilation); 2540 2541 // In hosted mode, print the JVMCI compiler specific counters manually. 2542 if (!UseJVMCICompiler) { 2543 JVMCICompiler::print_compilation_timers(); 2544 } 2545 #else // INCLUDE_JVMCI 2546 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2547 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2548 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2549 2550 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2551 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2552 2553 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2554 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2555 int total_compile_count = CompileBroker::_total_compile_count; 2556 2557 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2558 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2559 #endif // INCLUDE_JVMCI 2560 2561 if (!aggregate) { 2562 return; 2563 } 2564 tty->cr(); 2565 tty->print_cr("Accumulated compiler times"); 2566 tty->print_cr("----------------------------------------------------------"); 2567 //0000000000111111111122222222223333333333444444444455555555556666666666 2568 //0123456789012345678901234567890123456789012345678901234567890123456789 2569 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2570 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2571 standard_compilation.seconds(), 2572 standard_compilation.seconds() / standard_compile_count); 2573 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2574 CompileBroker::_t_bailedout_compilation.seconds(), 2575 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2576 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2577 osr_compilation.seconds(), 2578 osr_compilation.seconds() / osr_compile_count); 2579 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2580 CompileBroker::_t_invalidated_compilation.seconds(), 2581 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2582 2583 AbstractCompiler *comp = compiler(CompLevel_simple); 2584 if (comp != NULL) { 2585 tty->cr(); 2586 comp->print_timers(); 2587 } 2588 comp = compiler(CompLevel_full_optimization); 2589 if (comp != NULL) { 2590 tty->cr(); 2591 comp->print_timers(); 2592 } 2593 tty->cr(); 2594 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2595 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2596 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2597 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2598 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2599 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2600 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2601 double tcs = total_compilation.seconds(); 2602 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2603 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2604 tty->cr(); 2605 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2606 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2607 } 2608 2609 // Print general/accumulated JIT information. 2610 void CompileBroker::print_info(outputStream *out) { 2611 if (out == NULL) out = tty; 2612 out->cr(); 2613 out->print_cr("======================"); 2614 out->print_cr(" General JIT info "); 2615 out->print_cr("======================"); 2616 out->cr(); 2617 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2618 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2619 out->cr(); 2620 out->print_cr("CodeCache overview"); 2621 out->print_cr("--------------------------------------------------------"); 2622 out->cr(); 2623 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2624 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2625 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2626 out->cr(); 2627 2628 out->cr(); 2629 out->print_cr("CodeCache cleaning overview"); 2630 out->print_cr("--------------------------------------------------------"); 2631 out->cr(); 2632 NMethodSweeper::print(out); 2633 out->print_cr("--------------------------------------------------------"); 2634 out->cr(); 2635 } 2636 2637 // Note: tty_lock must not be held upon entry to this function. 2638 // Print functions called from herein do "micro-locking" on tty_lock. 2639 // That's a tradeoff which keeps together important blocks of output. 2640 // At the same time, continuous tty_lock hold time is kept in check, 2641 // preventing concurrently printing threads from stalling a long time. 2642 void CompileBroker::print_heapinfo(outputStream* out, const char* function, const char* granularity) { 2643 TimeStamp ts_total; 2644 TimeStamp ts_global; 2645 TimeStamp ts; 2646 2647 bool allFun = !strcmp(function, "all"); 2648 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2649 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2650 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2651 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2652 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2653 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2654 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2655 bool discard = !strcmp(function, "discard") || allFun; 2656 2657 if (out == NULL) { 2658 out = tty; 2659 } 2660 2661 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2662 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2663 out->cr(); 2664 return; 2665 } 2666 2667 ts_total.update(); // record starting point 2668 2669 if (aggregate) { 2670 print_info(out); 2671 } 2672 2673 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2674 // That prevents another thread from destroying our view on the CodeHeap. 2675 // When we request individual parts of the analysis via the jcmd interface, it is possible 2676 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2677 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2678 // across user interaction. 2679 // Acquire this lock before acquiring the CodeCache_lock. 2680 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2681 // leading to an unnecessarily long hold time of the CodeCache_lock. 2682 ts.update(); // record starting point 2683 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2684 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds()); 2685 2686 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock 2687 // for the entire duration of aggregation and printing. That makes sure 2688 // we see a consistent picture and do not run into issues caused by 2689 // the CodeHeap being altered concurrently. 2690 Monitor* global_lock = allFun ? CodeCache_lock : NULL; 2691 Monitor* function_lock = allFun ? NULL : CodeCache_lock; 2692 ts_global.update(); // record starting point 2693 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag); 2694 if (global_lock != NULL) { 2695 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds()); 2696 ts_global.update(); // record starting point 2697 } 2698 2699 if (aggregate) { 2700 ts.update(); // record starting point 2701 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag); 2702 if (function_lock != NULL) { 2703 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds()); 2704 } 2705 2706 ts.update(); // record starting point 2707 CodeCache::aggregate(out, granularity); 2708 if (function_lock != NULL) { 2709 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds()); 2710 } 2711 } 2712 2713 if (usedSpace) CodeCache::print_usedSpace(out); 2714 if (freeSpace) CodeCache::print_freeSpace(out); 2715 if (methodCount) CodeCache::print_count(out); 2716 if (methodSpace) CodeCache::print_space(out); 2717 if (methodAge) CodeCache::print_age(out); 2718 if (methodNames) { 2719 // print_names() has shown to be sensitive to concurrent CodeHeap modifications. 2720 // Therefore, request the CodeCache_lock before calling... 2721 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag); 2722 CodeCache::print_names(out); 2723 } 2724 if (discard) CodeCache::discard(out); 2725 2726 if (global_lock != NULL) { 2727 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds()); 2728 } 2729 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds()); 2730 }