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 "memory/universe.hpp" 44 #include "oops/methodData.hpp" 45 #include "oops/method.inline.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "prims/whitebox.hpp" 49 #include "runtime/arguments.hpp" 50 #include "runtime/atomic.hpp" 51 #include "compiler/compilationPolicy.hpp" 52 #include "runtime/handles.inline.hpp" 53 #include "runtime/init.hpp" 54 #include "runtime/interfaceSupport.inline.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/jniHandles.inline.hpp" 57 #include "runtime/os.hpp" 58 #include "runtime/safepointVerifiers.hpp" 59 #include "runtime/sharedRuntime.hpp" 60 #include "runtime/sweeper.hpp" 61 #include "runtime/timerTrace.hpp" 62 #include "runtime/vframe.inline.hpp" 63 #include "utilities/debug.hpp" 64 #include "utilities/dtrace.hpp" 65 #include "utilities/events.hpp" 66 #include "utilities/formatBuffer.hpp" 67 #include "utilities/macros.hpp" 68 #ifdef COMPILER1 69 #include "c1/c1_Compiler.hpp" 70 #endif 71 #if INCLUDE_JVMCI 72 #include "jvmci/jvmciEnv.hpp" 73 #include "jvmci/jvmciRuntime.hpp" 74 #endif 75 #ifdef COMPILER2 76 #include "opto/c2compiler.hpp" 77 #endif 78 79 #ifdef DTRACE_ENABLED 80 81 // Only bother with this argument setup if dtrace is available 82 83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 84 { \ 85 Symbol* klass_name = (method)->klass_name(); \ 86 Symbol* name = (method)->name(); \ 87 Symbol* signature = (method)->signature(); \ 88 HOTSPOT_METHOD_COMPILE_BEGIN( \ 89 (char *) comp_name, strlen(comp_name), \ 90 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 91 (char *) name->bytes(), name->utf8_length(), \ 92 (char *) signature->bytes(), signature->utf8_length()); \ 93 } 94 95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 96 { \ 97 Symbol* klass_name = (method)->klass_name(); \ 98 Symbol* name = (method)->name(); \ 99 Symbol* signature = (method)->signature(); \ 100 HOTSPOT_METHOD_COMPILE_END( \ 101 (char *) comp_name, strlen(comp_name), \ 102 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 103 (char *) name->bytes(), name->utf8_length(), \ 104 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 105 } 106 107 #else // ndef DTRACE_ENABLED 108 109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 111 112 #endif // ndef DTRACE_ENABLED 113 114 bool CompileBroker::_initialized = false; 115 volatile bool CompileBroker::_should_block = false; 116 volatile int CompileBroker::_print_compilation_warning = 0; 117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 118 119 // The installed compiler(s) 120 AbstractCompiler* CompileBroker::_compilers[2]; 121 122 // The maximum numbers of compiler threads to be determined during startup. 123 int CompileBroker::_c1_count = 0; 124 int CompileBroker::_c2_count = 0; 125 126 // An array of compiler names as Java String objects 127 jobject* CompileBroker::_compiler1_objects = NULL; 128 jobject* CompileBroker::_compiler2_objects = NULL; 129 130 CompileLog** CompileBroker::_compiler1_logs = NULL; 131 CompileLog** CompileBroker::_compiler2_logs = NULL; 132 133 // These counters are used to assign an unique ID to each compilation. 134 volatile jint CompileBroker::_compilation_id = 0; 135 volatile jint CompileBroker::_osr_compilation_id = 0; 136 137 // Performance counters 138 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 139 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 140 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 141 142 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 143 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 144 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 145 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 146 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 147 148 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 149 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 150 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 151 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 152 153 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 154 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 155 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 156 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 157 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 158 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 159 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 160 161 // Timers and counters for generating statistics 162 elapsedTimer CompileBroker::_t_total_compilation; 163 elapsedTimer CompileBroker::_t_osr_compilation; 164 elapsedTimer CompileBroker::_t_standard_compilation; 165 elapsedTimer CompileBroker::_t_invalidated_compilation; 166 elapsedTimer CompileBroker::_t_bailedout_compilation; 167 168 int CompileBroker::_total_bailout_count = 0; 169 int CompileBroker::_total_invalidated_count = 0; 170 int CompileBroker::_total_compile_count = 0; 171 int CompileBroker::_total_osr_compile_count = 0; 172 int CompileBroker::_total_standard_compile_count = 0; 173 int CompileBroker::_total_compiler_stopped_count = 0; 174 int CompileBroker::_total_compiler_restarted_count = 0; 175 176 int CompileBroker::_sum_osr_bytes_compiled = 0; 177 int CompileBroker::_sum_standard_bytes_compiled = 0; 178 int CompileBroker::_sum_nmethod_size = 0; 179 int CompileBroker::_sum_nmethod_code_size = 0; 180 181 long CompileBroker::_peak_compilation_time = 0; 182 183 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 184 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 185 186 187 188 class CompilationLog : public StringEventLog { 189 public: 190 CompilationLog() : StringEventLog("Compilation events", "jit") { 191 } 192 193 void log_compile(JavaThread* thread, CompileTask* task) { 194 StringLogMessage lm; 195 stringStream sstr(lm.buffer(), lm.size()); 196 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 197 task->print(&sstr, NULL, true, false); 198 log(thread, "%s", (const char*)lm); 199 } 200 201 void log_nmethod(JavaThread* thread, nmethod* nm) { 202 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 203 nm->compile_id(), nm->is_osr_method() ? "%" : "", 204 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 205 } 206 207 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 208 StringLogMessage lm; 209 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 210 if (retry_message != NULL) { 211 lm.append(" (%s)", retry_message); 212 } 213 lm.print("\n"); 214 log(thread, "%s", (const char*)lm); 215 } 216 217 void log_metaspace_failure(const char* reason) { 218 ResourceMark rm; 219 StringLogMessage lm; 220 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 221 lm.print("\n"); 222 log(JavaThread::current(), "%s", (const char*)lm); 223 } 224 }; 225 226 static CompilationLog* _compilation_log = NULL; 227 228 bool compileBroker_init() { 229 if (LogEvents) { 230 _compilation_log = new CompilationLog(); 231 } 232 233 // init directives stack, adding default directive 234 DirectivesStack::init(); 235 236 if (DirectivesParser::has_file()) { 237 return DirectivesParser::parse_from_flag(); 238 } else if (CompilerDirectivesPrint) { 239 // Print default directive even when no other was added 240 DirectivesStack::print(tty); 241 } 242 243 return true; 244 } 245 246 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 247 CompilerThread* thread = CompilerThread::current(); 248 thread->set_task(task); 249 #if INCLUDE_JVMCI 250 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 251 task->set_jvmci_compiler_thread(thread); 252 } 253 #endif 254 CompileLog* log = thread->log(); 255 if (log != NULL && !task->is_unloaded()) task->log_task_start(log); 256 } 257 258 CompileTaskWrapper::~CompileTaskWrapper() { 259 CompilerThread* thread = CompilerThread::current(); 260 CompileTask* task = thread->task(); 261 CompileLog* log = thread->log(); 262 if (log != NULL && !task->is_unloaded()) task->log_task_done(log); 263 thread->set_task(NULL); 264 task->set_code_handle(NULL); 265 thread->set_env(NULL); 266 if (task->is_blocking()) { 267 bool free_task = false; 268 { 269 MutexLocker notifier(task->lock(), thread); 270 task->mark_complete(); 271 #if INCLUDE_JVMCI 272 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 273 if (!task->has_waiter()) { 274 // The waiting thread timed out and thus did not free the task. 275 free_task = true; 276 } 277 task->set_jvmci_compiler_thread(NULL); 278 } 279 #endif 280 if (!free_task) { 281 // Notify the waiting thread that the compilation has completed 282 // so that it can free the task. 283 task->lock()->notify_all(); 284 } 285 } 286 if (free_task) { 287 // The task can only be freed once the task lock is released. 288 CompileTask::free(task); 289 } 290 } else { 291 task->mark_complete(); 292 293 // By convention, the compiling thread is responsible for 294 // recycling a non-blocking CompileTask. 295 CompileTask::free(task); 296 } 297 } 298 299 /** 300 * Check if a CompilerThread can be removed and update count if requested. 301 */ 302 static bool can_remove(CompilerThread *ct, bool do_it) { 303 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 304 if (!ReduceNumberOfCompilerThreads) return false; 305 306 AbstractCompiler *compiler = ct->compiler(); 307 int compiler_count = compiler->num_compiler_threads(); 308 bool c1 = compiler->is_c1(); 309 310 // Keep at least 1 compiler thread of each type. 311 if (compiler_count < 2) return false; 312 313 // Keep thread alive for at least some time. 314 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 315 316 // We only allow the last compiler thread of each type to get removed. 317 jobject last_compiler = c1 ? CompileBroker::compiler1_object(compiler_count - 1) 318 : CompileBroker::compiler2_object(compiler_count - 1); 319 if (ct->threadObj() == JNIHandles::resolve_non_null(last_compiler)) { 320 if (do_it) { 321 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 322 compiler->set_num_compiler_threads(compiler_count - 1); 323 } 324 return true; 325 } 326 return false; 327 } 328 329 /** 330 * Add a CompileTask to a CompileQueue. 331 */ 332 void CompileQueue::add(CompileTask* task) { 333 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 334 335 task->set_next(NULL); 336 task->set_prev(NULL); 337 338 if (_last == NULL) { 339 // The compile queue is empty. 340 assert(_first == NULL, "queue is empty"); 341 _first = task; 342 _last = task; 343 } else { 344 // Append the task to the queue. 345 assert(_last->next() == NULL, "not last"); 346 _last->set_next(task); 347 task->set_prev(_last); 348 _last = task; 349 } 350 ++_size; 351 352 // Mark the method as being in the compile queue. 353 task->method()->set_queued_for_compilation(); 354 355 if (CIPrintCompileQueue) { 356 print_tty(); 357 } 358 359 if (LogCompilation && xtty != NULL) { 360 task->log_task_queued(); 361 } 362 363 // Notify CompilerThreads that a task is available. 364 MethodCompileQueue_lock->notify_all(); 365 } 366 367 /** 368 * Empties compilation queue by putting all compilation tasks onto 369 * a freelist. Furthermore, the method wakes up all threads that are 370 * waiting on a compilation task to finish. This can happen if background 371 * compilation is disabled. 372 */ 373 void CompileQueue::free_all() { 374 MutexLocker mu(MethodCompileQueue_lock); 375 CompileTask* next = _first; 376 377 // Iterate over all tasks in the compile queue 378 while (next != NULL) { 379 CompileTask* current = next; 380 next = current->next(); 381 { 382 // Wake up thread that blocks on the compile task. 383 MutexLocker ct_lock(current->lock()); 384 current->lock()->notify(); 385 } 386 // Put the task back on the freelist. 387 CompileTask::free(current); 388 } 389 _first = NULL; 390 391 // Wake up all threads that block on the queue. 392 MethodCompileQueue_lock->notify_all(); 393 } 394 395 /** 396 * Get the next CompileTask from a CompileQueue 397 */ 398 CompileTask* CompileQueue::get() { 399 // save methods from RedefineClasses across safepoint 400 // across MethodCompileQueue_lock below. 401 methodHandle save_method; 402 methodHandle save_hot_method; 403 404 MonitorLocker locker(MethodCompileQueue_lock); 405 // If _first is NULL we have no more compile jobs. There are two reasons for 406 // having no compile jobs: First, we compiled everything we wanted. Second, 407 // we ran out of code cache so compilation has been disabled. In the latter 408 // case we perform code cache sweeps to free memory such that we can re-enable 409 // compilation. 410 while (_first == NULL) { 411 // Exit loop if compilation is disabled forever 412 if (CompileBroker::is_compilation_disabled_forever()) { 413 return NULL; 414 } 415 416 // If there are no compilation tasks and we can compile new jobs 417 // (i.e., there is enough free space in the code cache) there is 418 // no need to invoke the sweeper. As a result, the hotness of methods 419 // remains unchanged. This behavior is desired, since we want to keep 420 // the stable state, i.e., we do not want to evict methods from the 421 // code cache if it is unnecessary. 422 // We need a timed wait here, since compiler threads can exit if compilation 423 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 424 // is not critical and we do not want idle compiler threads to wake up too often. 425 locker.wait(5*1000); 426 427 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 428 // Still nothing to compile. Give caller a chance to stop this thread. 429 if (can_remove(CompilerThread::current(), false)) return NULL; 430 } 431 } 432 433 if (CompileBroker::is_compilation_disabled_forever()) { 434 return NULL; 435 } 436 437 CompileTask* task; 438 { 439 NoSafepointVerifier nsv; 440 task = CompilationPolicy::policy()->select_task(this); 441 if (task != NULL) { 442 task = task->select_for_compilation(); 443 } 444 } 445 446 if (task != NULL) { 447 // Save method pointers across unlock safepoint. The task is removed from 448 // the compilation queue, which is walked during RedefineClasses. 449 save_method = methodHandle(task->method()); 450 save_hot_method = methodHandle(task->hot_method()); 451 452 remove(task); 453 } 454 purge_stale_tasks(); // may temporarily release MCQ lock 455 return task; 456 } 457 458 // Clean & deallocate stale compile tasks. 459 // Temporarily releases MethodCompileQueue lock. 460 void CompileQueue::purge_stale_tasks() { 461 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 462 if (_first_stale != NULL) { 463 // Stale tasks are purged when MCQ lock is released, 464 // but _first_stale updates are protected by MCQ lock. 465 // Once task processing starts and MCQ lock is released, 466 // other compiler threads can reuse _first_stale. 467 CompileTask* head = _first_stale; 468 _first_stale = NULL; 469 { 470 MutexUnlocker ul(MethodCompileQueue_lock); 471 for (CompileTask* task = head; task != NULL; ) { 472 CompileTask* next_task = task->next(); 473 CompileTaskWrapper ctw(task); // Frees the task 474 task->set_failure_reason("stale task"); 475 task = next_task; 476 } 477 } 478 } 479 } 480 481 void CompileQueue::remove(CompileTask* task) { 482 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 483 if (task->prev() != NULL) { 484 task->prev()->set_next(task->next()); 485 } else { 486 // max is the first element 487 assert(task == _first, "Sanity"); 488 _first = task->next(); 489 } 490 491 if (task->next() != NULL) { 492 task->next()->set_prev(task->prev()); 493 } else { 494 // max is the last element 495 assert(task == _last, "Sanity"); 496 _last = task->prev(); 497 } 498 --_size; 499 } 500 501 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 502 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 503 remove(task); 504 505 // Enqueue the task for reclamation (should be done outside MCQ lock) 506 task->set_next(_first_stale); 507 task->set_prev(NULL); 508 _first_stale = task; 509 } 510 511 // methods in the compile queue need to be marked as used on the stack 512 // so that they don't get reclaimed by Redefine Classes 513 void CompileQueue::mark_on_stack() { 514 CompileTask* task = _first; 515 while (task != NULL) { 516 task->mark_on_stack(); 517 task = task->next(); 518 } 519 } 520 521 522 CompileQueue* CompileBroker::compile_queue(int comp_level) { 523 if (is_c2_compile(comp_level)) return _c2_compile_queue; 524 if (is_c1_compile(comp_level)) return _c1_compile_queue; 525 return NULL; 526 } 527 528 void CompileBroker::print_compile_queues(outputStream* st) { 529 st->print_cr("Current compiles: "); 530 531 char buf[2000]; 532 int buflen = sizeof(buf); 533 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true); 534 535 st->cr(); 536 if (_c1_compile_queue != NULL) { 537 _c1_compile_queue->print(st); 538 } 539 if (_c2_compile_queue != NULL) { 540 _c2_compile_queue->print(st); 541 } 542 } 543 544 void CompileQueue::print(outputStream* st) { 545 assert_locked_or_safepoint(MethodCompileQueue_lock); 546 st->print_cr("%s:", name()); 547 CompileTask* task = _first; 548 if (task == NULL) { 549 st->print_cr("Empty"); 550 } else { 551 while (task != NULL) { 552 task->print(st, NULL, true, true); 553 task = task->next(); 554 } 555 } 556 st->cr(); 557 } 558 559 void CompileQueue::print_tty() { 560 ResourceMark rm; 561 stringStream ss; 562 // Dump the compile queue into a buffer before locking the tty 563 print(&ss); 564 { 565 ttyLocker ttyl; 566 tty->print("%s", ss.as_string()); 567 } 568 } 569 570 CompilerCounters::CompilerCounters() { 571 _current_method[0] = '\0'; 572 _compile_type = CompileBroker::no_compile; 573 } 574 575 // ------------------------------------------------------------------ 576 // CompileBroker::compilation_init 577 // 578 // Initialize the Compilation object 579 void CompileBroker::compilation_init_phase1(TRAPS) { 580 // No need to initialize compilation system if we do not use it. 581 if (!UseCompiler) { 582 return; 583 } 584 // Set the interface to the current compiler(s). 585 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 586 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 587 588 #if INCLUDE_JVMCI 589 if (EnableJVMCI) { 590 // This is creating a JVMCICompiler singleton. 591 JVMCICompiler* jvmci = new JVMCICompiler(); 592 593 if (UseJVMCICompiler) { 594 _compilers[1] = jvmci; 595 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 596 if (BootstrapJVMCI) { 597 // JVMCI will bootstrap so give it more threads 598 _c2_count = MIN2(32, os::active_processor_count()); 599 } 600 } else { 601 _c2_count = JVMCIThreads; 602 } 603 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 604 } else { 605 _c1_count = JVMCIHostThreads; 606 } 607 } 608 } 609 #endif // INCLUDE_JVMCI 610 611 #ifdef COMPILER1 612 if (_c1_count > 0) { 613 _compilers[0] = new Compiler(); 614 } 615 #endif // COMPILER1 616 617 #ifdef COMPILER2 618 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 619 if (_c2_count > 0) { 620 _compilers[1] = new C2Compiler(); 621 } 622 } 623 #endif // COMPILER2 624 625 // Start the compiler thread(s) and the sweeper thread 626 init_compiler_sweeper_threads(); 627 // totalTime performance counter is always created as it is required 628 // by the implementation of java.lang.management.CompilationMBean. 629 { 630 EXCEPTION_MARK; 631 _perf_total_compilation = 632 PerfDataManager::create_counter(JAVA_CI, "totalTime", 633 PerfData::U_Ticks, CHECK); 634 } 635 636 if (UsePerfData) { 637 638 EXCEPTION_MARK; 639 640 // create the jvmstat performance counters 641 _perf_osr_compilation = 642 PerfDataManager::create_counter(SUN_CI, "osrTime", 643 PerfData::U_Ticks, CHECK); 644 645 _perf_standard_compilation = 646 PerfDataManager::create_counter(SUN_CI, "standardTime", 647 PerfData::U_Ticks, CHECK); 648 649 _perf_total_bailout_count = 650 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 651 PerfData::U_Events, CHECK); 652 653 _perf_total_invalidated_count = 654 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 655 PerfData::U_Events, CHECK); 656 657 _perf_total_compile_count = 658 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 659 PerfData::U_Events, CHECK); 660 _perf_total_osr_compile_count = 661 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 662 PerfData::U_Events, CHECK); 663 664 _perf_total_standard_compile_count = 665 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 666 PerfData::U_Events, CHECK); 667 668 _perf_sum_osr_bytes_compiled = 669 PerfDataManager::create_counter(SUN_CI, "osrBytes", 670 PerfData::U_Bytes, CHECK); 671 672 _perf_sum_standard_bytes_compiled = 673 PerfDataManager::create_counter(SUN_CI, "standardBytes", 674 PerfData::U_Bytes, CHECK); 675 676 _perf_sum_nmethod_size = 677 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 678 PerfData::U_Bytes, CHECK); 679 680 _perf_sum_nmethod_code_size = 681 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 682 PerfData::U_Bytes, CHECK); 683 684 _perf_last_method = 685 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 686 CompilerCounters::cmname_buffer_length, 687 "", CHECK); 688 689 _perf_last_failed_method = 690 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 691 CompilerCounters::cmname_buffer_length, 692 "", CHECK); 693 694 _perf_last_invalidated_method = 695 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 696 CompilerCounters::cmname_buffer_length, 697 "", CHECK); 698 699 _perf_last_compile_type = 700 PerfDataManager::create_variable(SUN_CI, "lastType", 701 PerfData::U_None, 702 (jlong)CompileBroker::no_compile, 703 CHECK); 704 705 _perf_last_compile_size = 706 PerfDataManager::create_variable(SUN_CI, "lastSize", 707 PerfData::U_Bytes, 708 (jlong)CompileBroker::no_compile, 709 CHECK); 710 711 712 _perf_last_failed_type = 713 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 714 PerfData::U_None, 715 (jlong)CompileBroker::no_compile, 716 CHECK); 717 718 _perf_last_invalidated_type = 719 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 720 PerfData::U_None, 721 (jlong)CompileBroker::no_compile, 722 CHECK); 723 } 724 } 725 726 // Completes compiler initialization. Compilation requests submitted 727 // prior to this will be silently ignored. 728 void CompileBroker::compilation_init_phase2() { 729 _initialized = true; 730 } 731 732 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) { 733 Handle string = java_lang_String::create_from_str(name, CHECK_NH); 734 Handle thread_group(THREAD, Universe::system_thread_group()); 735 return JavaCalls::construct_new_instance( 736 SystemDictionary::Thread_klass(), 737 vmSymbols::threadgroup_string_void_signature(), 738 thread_group, 739 string, 740 CHECK_NH); 741 } 742 743 744 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) { 745 JavaThread* thread = NULL; 746 { 747 MutexLocker mu(Threads_lock, THREAD); 748 if (comp != NULL) { 749 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { 750 CompilerCounters* counters = new CompilerCounters(); 751 thread = new CompilerThread(queue, counters); 752 } 753 } else { 754 thread = new CodeCacheSweeperThread(); 755 } 756 // At this point the new CompilerThread data-races with this startup 757 // thread (which I believe is the primoridal thread and NOT the VM 758 // thread). This means Java bytecodes being executed at startup can 759 // queue compile jobs which will run at whatever default priority the 760 // newly created CompilerThread runs at. 761 762 763 // At this point it may be possible that no osthread was created for the 764 // JavaThread due to lack of memory. We would have to throw an exception 765 // in that case. However, since this must work and we do not allow 766 // exceptions anyway, check and abort if this fails. But first release the 767 // lock. 768 769 if (thread != NULL && thread->osthread() != NULL) { 770 771 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread); 772 773 // Note that this only sets the JavaThread _priority field, which by 774 // definition is limited to Java priorities and not OS priorities. 775 // The os-priority is set in the CompilerThread startup code itself 776 777 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority); 778 779 // Note that we cannot call os::set_priority because it expects Java 780 // priorities and we are *explicitly* using OS priorities so that it's 781 // possible to set the compiler thread priority higher than any Java 782 // thread. 783 784 int native_prio = CompilerThreadPriority; 785 if (native_prio == -1) { 786 if (UseCriticalCompilerThreadPriority) { 787 native_prio = os::java_to_os_priority[CriticalPriority]; 788 } else { 789 native_prio = os::java_to_os_priority[NearMaxPriority]; 790 } 791 } 792 os::set_native_priority(thread, native_prio); 793 794 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle)); 795 796 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle)); 797 if (comp != NULL) { 798 thread->as_CompilerThread()->set_compiler(comp); 799 } 800 Threads::add(thread); 801 Thread::start(thread); 802 } 803 } 804 805 // First release lock before aborting VM. 806 if (thread == NULL || thread->osthread() == NULL) { 807 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) { 808 if (thread != NULL) { 809 thread->smr_delete(); 810 } 811 return NULL; 812 } 813 vm_exit_during_initialization("java.lang.OutOfMemoryError", 814 os::native_thread_creation_failed_msg()); 815 } 816 817 // Let go of Threads_lock before yielding 818 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 819 820 return thread; 821 } 822 823 824 void CompileBroker::init_compiler_sweeper_threads() { 825 EXCEPTION_MARK; 826 #if !defined(ZERO) 827 assert(_c2_count > 0 || _c1_count > 0, "No compilers?"); 828 #endif // !ZERO 829 // Initialize the compilation queue 830 if (_c2_count > 0) { 831 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 832 _c2_compile_queue = new CompileQueue(name); 833 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler); 834 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler); 835 } 836 if (_c1_count > 0) { 837 _c1_compile_queue = new CompileQueue("C1 compile queue"); 838 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler); 839 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler); 840 } 841 842 char name_buffer[256]; 843 844 for (int i = 0; i < _c2_count; i++) { 845 // Create a name for our thread. 846 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 847 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 848 jobject thread_handle = JNIHandles::make_global(thread_oop); 849 _compiler2_objects[i] = thread_handle; 850 _compiler2_logs[i] = NULL; 851 852 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 853 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK); 854 assert(ct != NULL, "should have been handled for initial thread"); 855 _compilers[1]->set_num_compiler_threads(i + 1); 856 if (TraceCompilerThreads) { 857 ResourceMark rm; 858 MutexLocker mu(Threads_lock); 859 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 860 } 861 } 862 } 863 864 for (int i = 0; i < _c1_count; i++) { 865 // Create a name for our thread. 866 sprintf(name_buffer, "C1 CompilerThread%d", i); 867 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 868 jobject thread_handle = JNIHandles::make_global(thread_oop); 869 _compiler1_objects[i] = thread_handle; 870 _compiler1_logs[i] = NULL; 871 872 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 873 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK); 874 assert(ct != NULL, "should have been handled for initial thread"); 875 _compilers[0]->set_num_compiler_threads(i + 1); 876 if (TraceCompilerThreads) { 877 ResourceMark rm; 878 MutexLocker mu(Threads_lock); 879 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 880 } 881 } 882 } 883 884 if (UsePerfData) { 885 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 886 } 887 888 if (MethodFlushing) { 889 // Initialize the sweeper thread 890 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK); 891 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop()); 892 make_thread(thread_handle, NULL, NULL, CHECK); 893 } 894 } 895 896 void CompileBroker::possibly_add_compiler_threads() { 897 EXCEPTION_MARK; 898 899 julong available_memory = os::available_memory(); 900 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All). 901 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled), 902 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled); 903 904 // Only do attempt to start additional threads if the lock is free. 905 if (!CompileThread_lock->try_lock()) return; 906 907 if (_c2_compile_queue != NULL) { 908 int old_c2_count = _compilers[1]->num_compiler_threads(); 909 int new_c2_count = MIN4(_c2_count, 910 _c2_compile_queue->size() / 2, 911 (int)(available_memory / (200*M)), 912 (int)(available_cc_np / (128*K))); 913 914 for (int i = old_c2_count; i < new_c2_count; i++) { 915 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK); 916 if (ct == NULL) break; 917 _compilers[1]->set_num_compiler_threads(i + 1); 918 if (TraceCompilerThreads) { 919 ResourceMark rm; 920 MutexLocker mu(Threads_lock); 921 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)", 922 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M)); 923 } 924 } 925 } 926 927 if (_c1_compile_queue != NULL) { 928 int old_c1_count = _compilers[0]->num_compiler_threads(); 929 int new_c1_count = MIN4(_c1_count, 930 _c1_compile_queue->size() / 4, 931 (int)(available_memory / (100*M)), 932 (int)(available_cc_p / (128*K))); 933 934 for (int i = old_c1_count; i < new_c1_count; i++) { 935 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK); 936 if (ct == NULL) break; 937 _compilers[0]->set_num_compiler_threads(i + 1); 938 if (TraceCompilerThreads) { 939 ResourceMark rm; 940 MutexLocker mu(Threads_lock); 941 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)", 942 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M)); 943 } 944 } 945 } 946 947 CompileThread_lock->unlock(); 948 } 949 950 951 /** 952 * Set the methods on the stack as on_stack so that redefine classes doesn't 953 * reclaim them. This method is executed at a safepoint. 954 */ 955 void CompileBroker::mark_on_stack() { 956 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 957 // Since we are at a safepoint, we do not need a lock to access 958 // the compile queues. 959 if (_c2_compile_queue != NULL) { 960 _c2_compile_queue->mark_on_stack(); 961 } 962 if (_c1_compile_queue != NULL) { 963 _c1_compile_queue->mark_on_stack(); 964 } 965 } 966 967 // ------------------------------------------------------------------ 968 // CompileBroker::compile_method 969 // 970 // Request compilation of a method. 971 void CompileBroker::compile_method_base(const methodHandle& method, 972 int osr_bci, 973 int comp_level, 974 const methodHandle& hot_method, 975 int hot_count, 976 CompileTask::CompileReason compile_reason, 977 bool blocking, 978 Thread* thread) { 979 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 980 assert(method->method_holder()->is_instance_klass(), 981 "sanity check"); 982 assert(!method->method_holder()->is_not_initialized(), 983 "method holder must be initialized"); 984 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 985 986 if (CIPrintRequests) { 987 tty->print("request: "); 988 method->print_short_name(tty); 989 if (osr_bci != InvocationEntryBci) { 990 tty->print(" osr_bci: %d", osr_bci); 991 } 992 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 993 if (!hot_method.is_null()) { 994 tty->print(" hot: "); 995 if (hot_method() != method()) { 996 hot_method->print_short_name(tty); 997 } else { 998 tty->print("yes"); 999 } 1000 } 1001 tty->cr(); 1002 } 1003 1004 // A request has been made for compilation. Before we do any 1005 // real work, check to see if the method has been compiled 1006 // in the meantime with a definitive result. 1007 if (compilation_is_complete(method, osr_bci, comp_level)) { 1008 return; 1009 } 1010 1011 #ifndef PRODUCT 1012 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1013 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1014 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1015 return; 1016 } 1017 } 1018 #endif 1019 1020 // If this method is already in the compile queue, then 1021 // we do not block the current thread. 1022 if (compilation_is_in_queue(method)) { 1023 // We may want to decay our counter a bit here to prevent 1024 // multiple denied requests for compilation. This is an 1025 // open compilation policy issue. Note: The other possibility, 1026 // in the case that this is a blocking compile request, is to have 1027 // all subsequent blocking requesters wait for completion of 1028 // ongoing compiles. Note that in this case we'll need a protocol 1029 // for freeing the associated compile tasks. [Or we could have 1030 // a single static monitor on which all these waiters sleep.] 1031 return; 1032 } 1033 1034 if (TieredCompilation) { 1035 // Tiered policy requires MethodCounters to exist before adding a method to 1036 // the queue. Create if we don't have them yet. 1037 method->get_method_counters(thread); 1038 } 1039 1040 // Outputs from the following MutexLocker block: 1041 CompileTask* task = NULL; 1042 CompileQueue* queue = compile_queue(comp_level); 1043 1044 // Acquire our lock. 1045 { 1046 MutexLocker locker(MethodCompileQueue_lock, thread); 1047 1048 // Make sure the method has not slipped into the queues since 1049 // last we checked; note that those checks were "fast bail-outs". 1050 // Here we need to be more careful, see 14012000 below. 1051 if (compilation_is_in_queue(method)) { 1052 return; 1053 } 1054 1055 // We need to check again to see if the compilation has 1056 // completed. A previous compilation may have registered 1057 // some result. 1058 if (compilation_is_complete(method, osr_bci, comp_level)) { 1059 return; 1060 } 1061 1062 // We now know that this compilation is not pending, complete, 1063 // or prohibited. Assign a compile_id to this compilation 1064 // and check to see if it is in our [Start..Stop) range. 1065 int compile_id = assign_compile_id(method, osr_bci); 1066 if (compile_id == 0) { 1067 // The compilation falls outside the allowed range. 1068 return; 1069 } 1070 1071 #if INCLUDE_JVMCI 1072 if (UseJVMCICompiler && blocking) { 1073 // Don't allow blocking compiles for requests triggered by JVMCI. 1074 if (thread->is_Compiler_thread()) { 1075 blocking = false; 1076 } 1077 1078 if (!UseJVMCINativeLibrary) { 1079 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1080 vframeStream vfst((JavaThread*) thread); 1081 for (; !vfst.at_end(); vfst.next()) { 1082 if (vfst.method()->is_static_initializer() || 1083 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1084 vfst.method()->name() == vmSymbols::loadClass_name())) { 1085 blocking = false; 1086 break; 1087 } 1088 } 1089 } 1090 1091 // Don't allow blocking compilation requests to JVMCI 1092 // if JVMCI itself is not yet initialized 1093 if (!JVMCI::is_compiler_initialized() && compiler(comp_level)->is_jvmci()) { 1094 blocking = false; 1095 } 1096 1097 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1098 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1099 // such as the DestroyJavaVM thread. 1100 if (JVMCI::shutdown_called()) { 1101 blocking = false; 1102 } 1103 } 1104 #endif // INCLUDE_JVMCI 1105 1106 // We will enter the compilation in the queue. 1107 // 14012000: Note that this sets the queued_for_compile bits in 1108 // the target method. We can now reason that a method cannot be 1109 // queued for compilation more than once, as follows: 1110 // Before a thread queues a task for compilation, it first acquires 1111 // the compile queue lock, then checks if the method's queued bits 1112 // are set or it has already been compiled. Thus there can not be two 1113 // instances of a compilation task for the same method on the 1114 // compilation queue. Consider now the case where the compilation 1115 // thread has already removed a task for that method from the queue 1116 // and is in the midst of compiling it. In this case, the 1117 // queued_for_compile bits must be set in the method (and these 1118 // will be visible to the current thread, since the bits were set 1119 // under protection of the compile queue lock, which we hold now. 1120 // When the compilation completes, the compiler thread first sets 1121 // the compilation result and then clears the queued_for_compile 1122 // bits. Neither of these actions are protected by a barrier (or done 1123 // under the protection of a lock), so the only guarantee we have 1124 // (on machines with TSO (Total Store Order)) is that these values 1125 // will update in that order. As a result, the only combinations of 1126 // these bits that the current thread will see are, in temporal order: 1127 // <RESULT, QUEUE> : 1128 // <0, 1> : in compile queue, but not yet compiled 1129 // <1, 1> : compiled but queue bit not cleared 1130 // <1, 0> : compiled and queue bit cleared 1131 // Because we first check the queue bits then check the result bits, 1132 // we are assured that we cannot introduce a duplicate task. 1133 // Note that if we did the tests in the reverse order (i.e. check 1134 // result then check queued bit), we could get the result bit before 1135 // the compilation completed, and the queue bit after the compilation 1136 // completed, and end up introducing a "duplicate" (redundant) task. 1137 // In that case, the compiler thread should first check if a method 1138 // has already been compiled before trying to compile it. 1139 // NOTE: in the event that there are multiple compiler threads and 1140 // there is de-optimization/recompilation, things will get hairy, 1141 // and in that case it's best to protect both the testing (here) of 1142 // these bits, and their updating (here and elsewhere) under a 1143 // common lock. 1144 task = create_compile_task(queue, 1145 compile_id, method, 1146 osr_bci, comp_level, 1147 hot_method, hot_count, compile_reason, 1148 blocking); 1149 } 1150 1151 if (blocking) { 1152 wait_for_completion(task); 1153 } 1154 } 1155 1156 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1157 int comp_level, 1158 const methodHandle& hot_method, int hot_count, 1159 CompileTask::CompileReason compile_reason, 1160 Thread* THREAD) { 1161 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1162 if (!_initialized || comp_level == CompLevel_none) { 1163 return NULL; 1164 } 1165 1166 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1167 assert(comp != NULL, "Ensure we have a compiler"); 1168 1169 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1170 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1171 DirectivesStack::release(directive); 1172 return nm; 1173 } 1174 1175 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1176 int comp_level, 1177 const methodHandle& hot_method, int hot_count, 1178 CompileTask::CompileReason compile_reason, 1179 DirectiveSet* directive, 1180 Thread* THREAD) { 1181 1182 // make sure arguments make sense 1183 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1184 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1185 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1186 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1187 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1188 // allow any levels for WhiteBox 1189 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1190 // return quickly if possible 1191 1192 // lock, make sure that the compilation 1193 // isn't prohibited in a straightforward way. 1194 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1195 if (comp == NULL || !comp->can_compile_method(method) || 1196 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1197 return NULL; 1198 } 1199 1200 #if INCLUDE_JVMCI 1201 if (comp->is_jvmci() && !JVMCI::can_initialize_JVMCI()) { 1202 return NULL; 1203 } 1204 #endif 1205 1206 if (osr_bci == InvocationEntryBci) { 1207 // standard compilation 1208 CompiledMethod* method_code = method->code(); 1209 if (method_code != NULL && method_code->is_nmethod()) { 1210 if (compilation_is_complete(method, osr_bci, comp_level)) { 1211 return (nmethod*) method_code; 1212 } 1213 } 1214 if (method->is_not_compilable(comp_level)) { 1215 return NULL; 1216 } 1217 } else { 1218 // osr compilation 1219 #ifndef TIERED 1220 // seems like an assert of dubious value 1221 assert(comp_level == CompLevel_highest_tier, 1222 "all OSR compiles are assumed to be at a single compilation level"); 1223 #endif // TIERED 1224 // We accept a higher level osr method 1225 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1226 if (nm != NULL) return nm; 1227 if (method->is_not_osr_compilable(comp_level)) return NULL; 1228 } 1229 1230 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1231 // some prerequisites that are compiler specific 1232 if (comp->is_c2()) { 1233 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1234 // Resolve all classes seen in the signature of the method 1235 // we are compiling. 1236 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1237 } 1238 1239 // If the method is native, do the lookup in the thread requesting 1240 // the compilation. Native lookups can load code, which is not 1241 // permitted during compilation. 1242 // 1243 // Note: A native method implies non-osr compilation which is 1244 // checked with an assertion at the entry of this method. 1245 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1246 bool in_base_library; 1247 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1248 if (HAS_PENDING_EXCEPTION) { 1249 // In case of an exception looking up the method, we just forget 1250 // about it. The interpreter will kick-in and throw the exception. 1251 method->set_not_compilable("NativeLookup::lookup failed"); // implies is_not_osr_compilable() 1252 CLEAR_PENDING_EXCEPTION; 1253 return NULL; 1254 } 1255 assert(method->has_native_function(), "must have native code by now"); 1256 } 1257 1258 // RedefineClasses() has replaced this method; just return 1259 if (method->is_old()) { 1260 return NULL; 1261 } 1262 1263 // JVMTI -- post_compile_event requires jmethod_id() that may require 1264 // a lock the compiling thread can not acquire. Prefetch it here. 1265 if (JvmtiExport::should_post_compiled_method_load()) { 1266 method->jmethod_id(); 1267 } 1268 1269 // do the compilation 1270 if (method->is_native()) { 1271 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1272 // The following native methods: 1273 // 1274 // java.lang.Float.intBitsToFloat 1275 // java.lang.Float.floatToRawIntBits 1276 // java.lang.Double.longBitsToDouble 1277 // java.lang.Double.doubleToRawLongBits 1278 // 1279 // are called through the interpreter even if interpreter native stubs 1280 // are not preferred (i.e., calling through adapter handlers is preferred). 1281 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1282 // if the version of the methods from the native libraries is called. 1283 // As the interpreter and the C2-intrinsified version of the methods preserves 1284 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1285 if ((UseSSE >= 1 && 1286 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1287 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1288 (UseSSE >= 2 && 1289 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1290 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1291 return NULL; 1292 } 1293 1294 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1295 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1296 // 1297 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1298 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1299 AdapterHandlerLibrary::create_native_wrapper(method); 1300 } else { 1301 return NULL; 1302 } 1303 } else { 1304 // If the compiler is shut off due to code cache getting full 1305 // fail out now so blocking compiles dont hang the java thread 1306 if (!should_compile_new_jobs()) { 1307 CompilationPolicy::policy()->delay_compilation(method()); 1308 return NULL; 1309 } 1310 bool is_blocking = !directive->BackgroundCompilationOption || ReplayCompiles; 1311 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1312 } 1313 1314 // return requested nmethod 1315 // We accept a higher level osr method 1316 if (osr_bci == InvocationEntryBci) { 1317 CompiledMethod* code = method->code(); 1318 if (code == NULL) { 1319 return (nmethod*) code; 1320 } else { 1321 return code->as_nmethod_or_null(); 1322 } 1323 } 1324 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1325 } 1326 1327 1328 // ------------------------------------------------------------------ 1329 // CompileBroker::compilation_is_complete 1330 // 1331 // See if compilation of this method is already complete. 1332 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1333 int osr_bci, 1334 int comp_level) { 1335 bool is_osr = (osr_bci != standard_entry_bci); 1336 if (is_osr) { 1337 if (method->is_not_osr_compilable(comp_level)) { 1338 return true; 1339 } else { 1340 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1341 return (result != NULL); 1342 } 1343 } else { 1344 if (method->is_not_compilable(comp_level)) { 1345 return true; 1346 } else { 1347 CompiledMethod* result = method->code(); 1348 if (result == NULL) return false; 1349 return comp_level == result->comp_level(); 1350 } 1351 } 1352 } 1353 1354 1355 /** 1356 * See if this compilation is already requested. 1357 * 1358 * Implementation note: there is only a single "is in queue" bit 1359 * for each method. This means that the check below is overly 1360 * conservative in the sense that an osr compilation in the queue 1361 * will block a normal compilation from entering the queue (and vice 1362 * versa). This can be remedied by a full queue search to disambiguate 1363 * cases. If it is deemed profitable, this may be done. 1364 */ 1365 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1366 return method->queued_for_compilation(); 1367 } 1368 1369 // ------------------------------------------------------------------ 1370 // CompileBroker::compilation_is_prohibited 1371 // 1372 // See if this compilation is not allowed. 1373 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1374 bool is_native = method->is_native(); 1375 // Some compilers may not support the compilation of natives. 1376 AbstractCompiler *comp = compiler(comp_level); 1377 if (is_native && 1378 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1379 method->set_not_compilable_quietly("native methods not supported", comp_level); 1380 return true; 1381 } 1382 1383 bool is_osr = (osr_bci != standard_entry_bci); 1384 // Some compilers may not support on stack replacement. 1385 if (is_osr && 1386 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1387 method->set_not_osr_compilable("OSR not supported", comp_level); 1388 return true; 1389 } 1390 1391 // The method may be explicitly excluded by the user. 1392 double scale; 1393 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1394 bool quietly = CompilerOracle::should_exclude_quietly(); 1395 if (PrintCompilation && !quietly) { 1396 // This does not happen quietly... 1397 ResourceMark rm; 1398 tty->print("### Excluding %s:%s", 1399 method->is_native() ? "generation of native wrapper" : "compile", 1400 (method->is_static() ? " static" : "")); 1401 method->print_short_name(tty); 1402 tty->cr(); 1403 } 1404 method->set_not_compilable("excluded by CompileCommand", comp_level, !quietly); 1405 } 1406 1407 return false; 1408 } 1409 1410 /** 1411 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1412 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1413 * The function also allows to generate separate compilation IDs for OSR compilations. 1414 */ 1415 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1416 #ifdef ASSERT 1417 bool is_osr = (osr_bci != standard_entry_bci); 1418 int id; 1419 if (method->is_native()) { 1420 assert(!is_osr, "can't be osr"); 1421 // Adapters, native wrappers and method handle intrinsics 1422 // should be generated always. 1423 return Atomic::add(1, &_compilation_id); 1424 } else if (CICountOSR && is_osr) { 1425 id = Atomic::add(1, &_osr_compilation_id); 1426 if (CIStartOSR <= id && id < CIStopOSR) { 1427 return id; 1428 } 1429 } else { 1430 id = Atomic::add(1, &_compilation_id); 1431 if (CIStart <= id && id < CIStop) { 1432 return id; 1433 } 1434 } 1435 1436 // Method was not in the appropriate compilation range. 1437 method->set_not_compilable_quietly("Not in requested compile id range"); 1438 return 0; 1439 #else 1440 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1441 // only _compilation_id is incremented. 1442 return Atomic::add(1, &_compilation_id); 1443 #endif 1444 } 1445 1446 // ------------------------------------------------------------------ 1447 // CompileBroker::assign_compile_id_unlocked 1448 // 1449 // Public wrapper for assign_compile_id that acquires the needed locks 1450 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1451 MutexLocker locker(MethodCompileQueue_lock, thread); 1452 return assign_compile_id(method, osr_bci); 1453 } 1454 1455 // ------------------------------------------------------------------ 1456 // CompileBroker::preload_classes 1457 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1458 // Move this code over from c1_Compiler.cpp 1459 ShouldNotReachHere(); 1460 } 1461 1462 1463 // ------------------------------------------------------------------ 1464 // CompileBroker::create_compile_task 1465 // 1466 // Create a CompileTask object representing the current request for 1467 // compilation. Add this task to the queue. 1468 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1469 int compile_id, 1470 const methodHandle& method, 1471 int osr_bci, 1472 int comp_level, 1473 const methodHandle& hot_method, 1474 int hot_count, 1475 CompileTask::CompileReason compile_reason, 1476 bool blocking) { 1477 CompileTask* new_task = CompileTask::allocate(); 1478 new_task->initialize(compile_id, method, osr_bci, comp_level, 1479 hot_method, hot_count, compile_reason, 1480 blocking); 1481 queue->add(new_task); 1482 return new_task; 1483 } 1484 1485 #if INCLUDE_JVMCI 1486 // The number of milliseconds to wait before checking if 1487 // JVMCI compilation has made progress. 1488 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1489 1490 // The number of JVMCI compilation progress checks that must fail 1491 // before unblocking a thread waiting for a blocking compilation. 1492 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1493 1494 /** 1495 * Waits for a JVMCI compiler to complete a given task. This thread 1496 * waits until either the task completes or it sees no JVMCI compilation 1497 * progress for N consecutive milliseconds where N is 1498 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1499 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1500 * 1501 * @return true if this thread needs to free/recycle the task 1502 */ 1503 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1504 MonitorLocker ml(task->lock(), thread); 1505 int progress_wait_attempts = 0; 1506 int methods_compiled = jvmci->methods_compiled(); 1507 while (!task->is_complete() && !is_compilation_disabled_forever() && 1508 ml.wait(JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1509 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1510 1511 bool progress; 1512 if (jvmci_compiler_thread != NULL) { 1513 // If the JVMCI compiler thread is not blocked or suspended, we deem it to be making progress. 1514 progress = jvmci_compiler_thread->thread_state() != _thread_blocked && 1515 !jvmci_compiler_thread->is_external_suspend(); 1516 } else { 1517 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1518 // that all JVMCI compiler threads are blocked on. We use the counter for 1519 // successful JVMCI compilations to determine whether JVMCI compilation 1520 // is still making progress through the JVMCI compiler queue. 1521 progress = jvmci->methods_compiled() != methods_compiled; 1522 } 1523 1524 if (!progress) { 1525 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1526 if (PrintCompilation) { 1527 task->print(tty, "wait for blocking compilation timed out"); 1528 } 1529 break; 1530 } 1531 } else { 1532 progress_wait_attempts = 0; 1533 if (jvmci_compiler_thread == NULL) { 1534 methods_compiled = jvmci->methods_compiled(); 1535 } 1536 } 1537 } 1538 task->clear_waiter(); 1539 return task->is_complete(); 1540 } 1541 #endif 1542 1543 /** 1544 * Wait for the compilation task to complete. 1545 */ 1546 void CompileBroker::wait_for_completion(CompileTask* task) { 1547 if (CIPrintCompileQueue) { 1548 ttyLocker ttyl; 1549 tty->print_cr("BLOCKING FOR COMPILE"); 1550 } 1551 1552 assert(task->is_blocking(), "can only wait on blocking task"); 1553 1554 JavaThread* thread = JavaThread::current(); 1555 1556 methodHandle method(thread, task->method()); 1557 bool free_task; 1558 #if INCLUDE_JVMCI 1559 AbstractCompiler* comp = compiler(task->comp_level()); 1560 if (comp->is_jvmci()) { 1561 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1562 } else 1563 #endif 1564 { 1565 MonitorLocker ml(task->lock(), thread); 1566 free_task = true; 1567 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1568 ml.wait(); 1569 } 1570 } 1571 1572 if (free_task) { 1573 if (is_compilation_disabled_forever()) { 1574 CompileTask::free(task); 1575 return; 1576 } 1577 1578 // It is harmless to check this status without the lock, because 1579 // completion is a stable property (until the task object is recycled). 1580 assert(task->is_complete(), "Compilation should have completed"); 1581 assert(task->code_handle() == NULL, "must be reset"); 1582 1583 // By convention, the waiter is responsible for recycling a 1584 // blocking CompileTask. Since there is only one waiter ever 1585 // waiting on a CompileTask, we know that no one else will 1586 // be using this CompileTask; we can free it. 1587 CompileTask::free(task); 1588 } 1589 } 1590 1591 /** 1592 * Initialize compiler thread(s) + compiler object(s). The postcondition 1593 * of this function is that the compiler runtimes are initialized and that 1594 * compiler threads can start compiling. 1595 */ 1596 bool CompileBroker::init_compiler_runtime() { 1597 CompilerThread* thread = CompilerThread::current(); 1598 AbstractCompiler* comp = thread->compiler(); 1599 // Final sanity check - the compiler object must exist 1600 guarantee(comp != NULL, "Compiler object must exist"); 1601 1602 { 1603 // Must switch to native to allocate ci_env 1604 ThreadToNativeFromVM ttn(thread); 1605 ciEnv ci_env((CompileTask*)NULL); 1606 // Cache Jvmti state 1607 ci_env.cache_jvmti_state(); 1608 // Cache DTrace flags 1609 ci_env.cache_dtrace_flags(); 1610 1611 // Switch back to VM state to do compiler initialization 1612 ThreadInVMfromNative tv(thread); 1613 ResetNoHandleMark rnhm; 1614 1615 // Perform per-thread and global initializations 1616 comp->initialize(); 1617 } 1618 1619 if (comp->is_failed()) { 1620 disable_compilation_forever(); 1621 // If compiler initialization failed, no compiler thread that is specific to a 1622 // particular compiler runtime will ever start to compile methods. 1623 shutdown_compiler_runtime(comp, thread); 1624 return false; 1625 } 1626 1627 // C1 specific check 1628 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1629 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1630 return false; 1631 } 1632 1633 return true; 1634 } 1635 1636 /** 1637 * If C1 and/or C2 initialization failed, we shut down all compilation. 1638 * We do this to keep things simple. This can be changed if it ever turns 1639 * out to be a problem. 1640 */ 1641 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1642 // Free buffer blob, if allocated 1643 if (thread->get_buffer_blob() != NULL) { 1644 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1645 CodeCache::free(thread->get_buffer_blob()); 1646 } 1647 1648 if (comp->should_perform_shutdown()) { 1649 // There are two reasons for shutting down the compiler 1650 // 1) compiler runtime initialization failed 1651 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1652 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1653 1654 // Only one thread per compiler runtime object enters here 1655 // Set state to shut down 1656 comp->set_shut_down(); 1657 1658 // Delete all queued compilation tasks to make compiler threads exit faster. 1659 if (_c1_compile_queue != NULL) { 1660 _c1_compile_queue->free_all(); 1661 } 1662 1663 if (_c2_compile_queue != NULL) { 1664 _c2_compile_queue->free_all(); 1665 } 1666 1667 // Set flags so that we continue execution with using interpreter only. 1668 UseCompiler = false; 1669 UseInterpreter = true; 1670 1671 // We could delete compiler runtimes also. However, there are references to 1672 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1673 // fail. This can be done later if necessary. 1674 } 1675 } 1676 1677 /** 1678 * Helper function to create new or reuse old CompileLog. 1679 */ 1680 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1681 if (!LogCompilation) return NULL; 1682 1683 AbstractCompiler *compiler = ct->compiler(); 1684 bool c1 = compiler->is_c1(); 1685 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1686 assert(compiler_objects != NULL, "must be initialized at this point"); 1687 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1688 assert(logs != NULL, "must be initialized at this point"); 1689 int count = c1 ? _c1_count : _c2_count; 1690 1691 // Find Compiler number by its threadObj. 1692 oop compiler_obj = ct->threadObj(); 1693 int compiler_number = 0; 1694 bool found = false; 1695 for (; compiler_number < count; compiler_number++) { 1696 if (JNIHandles::resolve_non_null(compiler_objects[compiler_number]) == compiler_obj) { 1697 found = true; 1698 break; 1699 } 1700 } 1701 assert(found, "Compiler must exist at this point"); 1702 1703 // Determine pointer for this thread's log. 1704 CompileLog** log_ptr = &logs[compiler_number]; 1705 1706 // Return old one if it exists. 1707 CompileLog* log = *log_ptr; 1708 if (log != NULL) { 1709 ct->init_log(log); 1710 return log; 1711 } 1712 1713 // Create a new one and remember it. 1714 init_compiler_thread_log(); 1715 log = ct->log(); 1716 *log_ptr = log; 1717 return log; 1718 } 1719 1720 // ------------------------------------------------------------------ 1721 // CompileBroker::compiler_thread_loop 1722 // 1723 // The main loop run by a CompilerThread. 1724 void CompileBroker::compiler_thread_loop() { 1725 CompilerThread* thread = CompilerThread::current(); 1726 CompileQueue* queue = thread->queue(); 1727 // For the thread that initializes the ciObjectFactory 1728 // this resource mark holds all the shared objects 1729 ResourceMark rm; 1730 1731 // First thread to get here will initialize the compiler interface 1732 1733 { 1734 ASSERT_IN_VM; 1735 MutexLocker only_one (CompileThread_lock, thread); 1736 if (!ciObjectFactory::is_initialized()) { 1737 ciObjectFactory::initialize(); 1738 } 1739 } 1740 1741 // Open a log. 1742 CompileLog* log = get_log(thread); 1743 if (log != NULL) { 1744 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1745 thread->name(), 1746 os::current_thread_id(), 1747 os::current_process_id()); 1748 log->stamp(); 1749 log->end_elem(); 1750 } 1751 1752 // If compiler thread/runtime initialization fails, exit the compiler thread 1753 if (!init_compiler_runtime()) { 1754 return; 1755 } 1756 1757 thread->start_idle_timer(); 1758 1759 // Poll for new compilation tasks as long as the JVM runs. Compilation 1760 // should only be disabled if something went wrong while initializing the 1761 // compiler runtimes. This, in turn, should not happen. The only known case 1762 // when compiler runtime initialization fails is if there is not enough free 1763 // space in the code cache to generate the necessary stubs, etc. 1764 while (!is_compilation_disabled_forever()) { 1765 // We need this HandleMark to avoid leaking VM handles. 1766 HandleMark hm(thread); 1767 1768 CompileTask* task = queue->get(); 1769 if (task == NULL) { 1770 if (UseDynamicNumberOfCompilerThreads) { 1771 // Access compiler_count under lock to enforce consistency. 1772 MutexLocker only_one(CompileThread_lock); 1773 if (can_remove(thread, true)) { 1774 if (TraceCompilerThreads) { 1775 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1776 thread->name(), thread->idle_time_millis()); 1777 } 1778 // Free buffer blob, if allocated 1779 if (thread->get_buffer_blob() != NULL) { 1780 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1781 CodeCache::free(thread->get_buffer_blob()); 1782 } 1783 return; // Stop this thread. 1784 } 1785 } 1786 } else { 1787 // Assign the task to the current thread. Mark this compilation 1788 // thread as active for the profiler. 1789 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition 1790 // occurs after fetching the compile task off the queue. 1791 CompileTaskWrapper ctw(task); 1792 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1793 task->set_code_handle(&result_handle); 1794 methodHandle method(thread, task->method()); 1795 1796 // Never compile a method if breakpoints are present in it 1797 if (method()->number_of_breakpoints() == 0) { 1798 // Compile the method. 1799 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1800 invoke_compiler_on_method(task); 1801 thread->start_idle_timer(); 1802 } else { 1803 // After compilation is disabled, remove remaining methods from queue 1804 method->clear_queued_for_compilation(); 1805 task->set_failure_reason("compilation is disabled"); 1806 } 1807 } 1808 1809 if (UseDynamicNumberOfCompilerThreads) { 1810 possibly_add_compiler_threads(); 1811 } 1812 } 1813 } 1814 1815 // Shut down compiler runtime 1816 shutdown_compiler_runtime(thread->compiler(), thread); 1817 } 1818 1819 // ------------------------------------------------------------------ 1820 // CompileBroker::init_compiler_thread_log 1821 // 1822 // Set up state required by +LogCompilation. 1823 void CompileBroker::init_compiler_thread_log() { 1824 CompilerThread* thread = CompilerThread::current(); 1825 char file_name[4*K]; 1826 FILE* fp = NULL; 1827 intx thread_id = os::current_thread_id(); 1828 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1829 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1830 if (dir == NULL) { 1831 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1832 thread_id, os::current_process_id()); 1833 } else { 1834 jio_snprintf(file_name, sizeof(file_name), 1835 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1836 os::file_separator(), thread_id, os::current_process_id()); 1837 } 1838 1839 fp = fopen(file_name, "wt"); 1840 if (fp != NULL) { 1841 if (LogCompilation && Verbose) { 1842 tty->print_cr("Opening compilation log %s", file_name); 1843 } 1844 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1845 if (log == NULL) { 1846 fclose(fp); 1847 return; 1848 } 1849 thread->init_log(log); 1850 1851 if (xtty != NULL) { 1852 ttyLocker ttyl; 1853 // Record any per thread log files 1854 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1855 } 1856 return; 1857 } 1858 } 1859 warning("Cannot open log file: %s", file_name); 1860 } 1861 1862 void CompileBroker::log_metaspace_failure() { 1863 const char* message = "some methods may not be compiled because metaspace " 1864 "is out of memory"; 1865 if (_compilation_log != NULL) { 1866 _compilation_log->log_metaspace_failure(message); 1867 } 1868 if (PrintCompilation) { 1869 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1870 } 1871 } 1872 1873 1874 // ------------------------------------------------------------------ 1875 // CompileBroker::set_should_block 1876 // 1877 // Set _should_block. 1878 // Call this from the VM, with Threads_lock held and a safepoint requested. 1879 void CompileBroker::set_should_block() { 1880 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1881 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1882 #ifndef PRODUCT 1883 if (PrintCompilation && (Verbose || WizardMode)) 1884 tty->print_cr("notifying compiler thread pool to block"); 1885 #endif 1886 _should_block = true; 1887 } 1888 1889 // ------------------------------------------------------------------ 1890 // CompileBroker::maybe_block 1891 // 1892 // Call this from the compiler at convenient points, to poll for _should_block. 1893 void CompileBroker::maybe_block() { 1894 if (_should_block) { 1895 #ifndef PRODUCT 1896 if (PrintCompilation && (Verbose || WizardMode)) 1897 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1898 #endif 1899 ThreadInVMfromNative tivfn(JavaThread::current()); 1900 } 1901 } 1902 1903 // wrapper for CodeCache::print_summary() 1904 static void codecache_print(bool detailed) 1905 { 1906 ResourceMark rm; 1907 stringStream s; 1908 // Dump code cache into a buffer before locking the tty, 1909 { 1910 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1911 CodeCache::print_summary(&s, detailed); 1912 } 1913 ttyLocker ttyl; 1914 tty->print("%s", s.as_string()); 1915 } 1916 1917 // wrapper for CodeCache::print_summary() using outputStream 1918 static void codecache_print(outputStream* out, bool detailed) { 1919 ResourceMark rm; 1920 stringStream s; 1921 1922 // Dump code cache into a buffer 1923 { 1924 MutexLocker mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1925 CodeCache::print_summary(&s, detailed); 1926 } 1927 1928 char* remaining_log = s.as_string(); 1929 while (*remaining_log != '\0') { 1930 char* eol = strchr(remaining_log, '\n'); 1931 if (eol == NULL) { 1932 out->print_cr("%s", remaining_log); 1933 remaining_log = remaining_log + strlen(remaining_log); 1934 } else { 1935 *eol = '\0'; 1936 out->print_cr("%s", remaining_log); 1937 remaining_log = eol + 1; 1938 } 1939 } 1940 } 1941 1942 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env, 1943 int compilable, const char* failure_reason) { 1944 if (success) { 1945 task->mark_success(); 1946 if (ci_env != NULL) { 1947 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1948 } 1949 if (_compilation_log != NULL) { 1950 nmethod* code = task->code(); 1951 if (code != NULL) { 1952 _compilation_log->log_nmethod(thread, code); 1953 } 1954 } 1955 } else if (AbortVMOnCompilationFailure) { 1956 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1957 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason); 1958 } 1959 if (compilable == ciEnv::MethodCompilable_never) { 1960 fatal("Never compilable: %s", failure_reason); 1961 } 1962 } 1963 // simulate crash during compilation 1964 assert(task->compile_id() != CICrashAt, "just as planned"); 1965 } 1966 1967 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 1968 assert(event != NULL, "invariant"); 1969 assert(event->should_commit(), "invariant"); 1970 event->set_method(task->method()); 1971 event->set_compileId(task->compile_id()); 1972 event->set_compileLevel(task->comp_level()); 1973 event->set_succeded(task->is_success()); 1974 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1975 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1976 event->set_inlinedBytes(task->num_inlined_bytecodes()); 1977 event->commit(); 1978 } 1979 1980 int DirectivesStack::_depth = 0; 1981 CompilerDirectives* DirectivesStack::_top = NULL; 1982 CompilerDirectives* DirectivesStack::_bottom = NULL; 1983 1984 // ------------------------------------------------------------------ 1985 // CompileBroker::invoke_compiler_on_method 1986 // 1987 // Compile a method. 1988 // 1989 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1990 task->print_ul(); 1991 if (PrintCompilation) { 1992 ResourceMark rm; 1993 task->print_tty(); 1994 } 1995 elapsedTimer time; 1996 1997 CompilerThread* thread = CompilerThread::current(); 1998 ResourceMark rm(thread); 1999 2000 if (LogEvents) { 2001 _compilation_log->log_compile(thread, task); 2002 } 2003 2004 // Common flags. 2005 uint compile_id = task->compile_id(); 2006 int osr_bci = task->osr_bci(); 2007 bool is_osr = (osr_bci != standard_entry_bci); 2008 bool should_log = (thread->log() != NULL); 2009 bool should_break = false; 2010 const int task_level = task->comp_level(); 2011 AbstractCompiler* comp = task->compiler(); 2012 2013 DirectiveSet* directive; 2014 { 2015 // create the handle inside it's own block so it can't 2016 // accidentally be referenced once the thread transitions to 2017 // native. The NoHandleMark before the transition should catch 2018 // any cases where this occurs in the future. 2019 methodHandle method(thread, task->method()); 2020 assert(!method->is_native(), "no longer compile natives"); 2021 2022 // Look up matching directives 2023 directive = DirectivesStack::getMatchingDirective(method, comp); 2024 2025 // Update compile information when using perfdata. 2026 if (UsePerfData) { 2027 update_compile_perf_data(thread, method, is_osr); 2028 } 2029 2030 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2031 } 2032 2033 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2034 if (should_log && !directive->LogOption) { 2035 should_log = false; 2036 } 2037 2038 // Allocate a new set of JNI handles. 2039 push_jni_handle_block(); 2040 Method* target_handle = task->method(); 2041 int compilable = ciEnv::MethodCompilable; 2042 const char* failure_reason = NULL; 2043 bool failure_reason_on_C_heap = false; 2044 const char* retry_message = NULL; 2045 2046 #if INCLUDE_JVMCI 2047 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2048 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2049 2050 TraceTime t1("compilation", &time); 2051 EventCompilation event; 2052 2053 // Skip redefined methods 2054 if (target_handle->is_old()) { 2055 failure_reason = "redefined method"; 2056 retry_message = "not retryable"; 2057 compilable = ciEnv::MethodCompilable_never; 2058 } else { 2059 JVMCICompileState compile_state(task); 2060 JVMCIEnv env(thread, &compile_state, __FILE__, __LINE__); 2061 methodHandle method(thread, target_handle); 2062 env.runtime()->compile_method(&env, jvmci, method, osr_bci); 2063 2064 failure_reason = compile_state.failure_reason(); 2065 failure_reason_on_C_heap = compile_state.failure_reason_on_C_heap(); 2066 if (!compile_state.retryable()) { 2067 retry_message = "not retryable"; 2068 compilable = ciEnv::MethodCompilable_not_at_tier; 2069 } 2070 if (task->code() == NULL) { 2071 assert(failure_reason != NULL, "must specify failure_reason"); 2072 } 2073 } 2074 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason); 2075 if (event.should_commit()) { 2076 post_compilation_event(&event, task); 2077 } 2078 2079 } else 2080 #endif // INCLUDE_JVMCI 2081 { 2082 NoHandleMark nhm; 2083 ThreadToNativeFromVM ttn(thread); 2084 2085 ciEnv ci_env(task); 2086 if (should_break) { 2087 ci_env.set_break_at_compile(true); 2088 } 2089 if (should_log) { 2090 ci_env.set_log(thread->log()); 2091 } 2092 assert(thread->env() == &ci_env, "set by ci_env"); 2093 // The thread-env() field is cleared in ~CompileTaskWrapper. 2094 2095 // Cache Jvmti state 2096 ci_env.cache_jvmti_state(); 2097 2098 // Cache DTrace flags 2099 ci_env.cache_dtrace_flags(); 2100 2101 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2102 2103 TraceTime t1("compilation", &time); 2104 EventCompilation event; 2105 2106 if (comp == NULL) { 2107 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2108 } else { 2109 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2110 MonitorLocker locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2111 while (WhiteBox::compilation_locked) { 2112 locker.wait(); 2113 } 2114 } 2115 comp->compile_method(&ci_env, target, osr_bci, directive); 2116 } 2117 2118 if (!ci_env.failing() && task->code() == NULL) { 2119 //assert(false, "compiler should always document failure"); 2120 // The compiler elected, without comment, not to register a result. 2121 // Do not attempt further compilations of this method. 2122 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2123 } 2124 2125 // Copy this bit to the enclosing block: 2126 compilable = ci_env.compilable(); 2127 2128 if (ci_env.failing()) { 2129 failure_reason = ci_env.failure_reason(); 2130 retry_message = ci_env.retry_message(); 2131 ci_env.report_failure(failure_reason); 2132 } 2133 2134 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason); 2135 if (event.should_commit()) { 2136 post_compilation_event(&event, task); 2137 } 2138 } 2139 // Remove the JNI handle block after the ciEnv destructor has run in 2140 // the previous block. 2141 pop_jni_handle_block(); 2142 2143 if (failure_reason != NULL) { 2144 task->set_failure_reason(failure_reason, failure_reason_on_C_heap); 2145 if (_compilation_log != NULL) { 2146 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2147 } 2148 if (PrintCompilation) { 2149 FormatBufferResource msg = retry_message != NULL ? 2150 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2151 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2152 task->print(tty, msg); 2153 } 2154 } 2155 2156 methodHandle method(thread, task->method()); 2157 2158 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2159 2160 collect_statistics(thread, time, task); 2161 2162 nmethod* nm = task->code(); 2163 if (nm != NULL) { 2164 nm->maybe_print_nmethod(directive); 2165 } 2166 DirectivesStack::release(directive); 2167 2168 if (PrintCompilation && PrintCompilation2) { 2169 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2170 tty->print("%4d ", compile_id); // print compilation number 2171 tty->print("%s ", (is_osr ? "%" : " ")); 2172 if (task->code() != NULL) { 2173 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2174 } 2175 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2176 } 2177 2178 Log(compilation, codecache) log; 2179 if (log.is_debug()) { 2180 LogStream ls(log.debug()); 2181 codecache_print(&ls, /* detailed= */ false); 2182 } 2183 if (PrintCodeCacheOnCompilation) { 2184 codecache_print(/* detailed= */ false); 2185 } 2186 // Disable compilation, if required. 2187 switch (compilable) { 2188 case ciEnv::MethodCompilable_never: 2189 if (is_osr) 2190 method->set_not_osr_compilable_quietly("MethodCompilable_never"); 2191 else 2192 method->set_not_compilable_quietly("MethodCompilable_never"); 2193 break; 2194 case ciEnv::MethodCompilable_not_at_tier: 2195 if (is_osr) 2196 method->set_not_osr_compilable_quietly("MethodCompilable_not_at_tier", task_level); 2197 else 2198 method->set_not_compilable_quietly("MethodCompilable_not_at_tier", task_level); 2199 break; 2200 } 2201 2202 // Note that the queued_for_compilation bits are cleared without 2203 // protection of a mutex. [They were set by the requester thread, 2204 // when adding the task to the compile queue -- at which time the 2205 // compile queue lock was held. Subsequently, we acquired the compile 2206 // queue lock to get this task off the compile queue; thus (to belabour 2207 // the point somewhat) our clearing of the bits must be occurring 2208 // only after the setting of the bits. See also 14012000 above. 2209 method->clear_queued_for_compilation(); 2210 } 2211 2212 /** 2213 * The CodeCache is full. Print warning and disable compilation. 2214 * Schedule code cache cleaning so compilation can continue later. 2215 * This function needs to be called only from CodeCache::allocate(), 2216 * since we currently handle a full code cache uniformly. 2217 */ 2218 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2219 UseInterpreter = true; 2220 if (UseCompiler || AlwaysCompileLoopMethods ) { 2221 if (xtty != NULL) { 2222 ResourceMark rm; 2223 stringStream s; 2224 // Dump code cache state into a buffer before locking the tty, 2225 // because log_state() will use locks causing lock conflicts. 2226 CodeCache::log_state(&s); 2227 // Lock to prevent tearing 2228 ttyLocker ttyl; 2229 xtty->begin_elem("code_cache_full"); 2230 xtty->print("%s", s.as_string()); 2231 xtty->stamp(); 2232 xtty->end_elem(); 2233 } 2234 2235 #ifndef PRODUCT 2236 if (ExitOnFullCodeCache) { 2237 codecache_print(/* detailed= */ true); 2238 before_exit(JavaThread::current()); 2239 exit_globals(); // will delete tty 2240 vm_direct_exit(1); 2241 } 2242 #endif 2243 if (UseCodeCacheFlushing) { 2244 // Since code cache is full, immediately stop new compiles 2245 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2246 NMethodSweeper::log_sweep("disable_compiler"); 2247 } 2248 } else { 2249 disable_compilation_forever(); 2250 } 2251 2252 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2253 } 2254 } 2255 2256 // ------------------------------------------------------------------ 2257 // CompileBroker::update_compile_perf_data 2258 // 2259 // Record this compilation for debugging purposes. 2260 void CompileBroker::update_compile_perf_data(CompilerThread* thread, const methodHandle& method, bool is_osr) { 2261 ResourceMark rm; 2262 char* method_name = method->name()->as_C_string(); 2263 char current_method[CompilerCounters::cmname_buffer_length]; 2264 size_t maxLen = CompilerCounters::cmname_buffer_length; 2265 2266 const char* class_name = method->method_holder()->name()->as_C_string(); 2267 2268 size_t s1len = strlen(class_name); 2269 size_t s2len = strlen(method_name); 2270 2271 // check if we need to truncate the string 2272 if (s1len + s2len + 2 > maxLen) { 2273 2274 // the strategy is to lop off the leading characters of the 2275 // class name and the trailing characters of the method name. 2276 2277 if (s2len + 2 > maxLen) { 2278 // lop of the entire class name string, let snprintf handle 2279 // truncation of the method name. 2280 class_name += s1len; // null string 2281 } 2282 else { 2283 // lop off the extra characters from the front of the class name 2284 class_name += ((s1len + s2len + 2) - maxLen); 2285 } 2286 } 2287 2288 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2289 2290 int last_compile_type = normal_compile; 2291 if (CICountOSR && is_osr) { 2292 last_compile_type = osr_compile; 2293 } 2294 2295 CompilerCounters* counters = thread->counters(); 2296 counters->set_current_method(current_method); 2297 counters->set_compile_type((jlong) last_compile_type); 2298 } 2299 2300 // ------------------------------------------------------------------ 2301 // CompileBroker::push_jni_handle_block 2302 // 2303 // Push on a new block of JNI handles. 2304 void CompileBroker::push_jni_handle_block() { 2305 JavaThread* thread = JavaThread::current(); 2306 2307 // Allocate a new block for JNI handles. 2308 // Inlined code from jni_PushLocalFrame() 2309 JNIHandleBlock* java_handles = thread->active_handles(); 2310 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2311 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2312 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2313 thread->set_active_handles(compile_handles); 2314 } 2315 2316 2317 // ------------------------------------------------------------------ 2318 // CompileBroker::pop_jni_handle_block 2319 // 2320 // Pop off the current block of JNI handles. 2321 void CompileBroker::pop_jni_handle_block() { 2322 JavaThread* thread = JavaThread::current(); 2323 2324 // Release our JNI handle block 2325 JNIHandleBlock* compile_handles = thread->active_handles(); 2326 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2327 thread->set_active_handles(java_handles); 2328 compile_handles->set_pop_frame_link(NULL); 2329 JNIHandleBlock::release_block(compile_handles, thread); // may block 2330 } 2331 2332 // ------------------------------------------------------------------ 2333 // CompileBroker::collect_statistics 2334 // 2335 // Collect statistics about the compilation. 2336 2337 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2338 bool success = task->is_success(); 2339 methodHandle method (thread, task->method()); 2340 uint compile_id = task->compile_id(); 2341 bool is_osr = (task->osr_bci() != standard_entry_bci); 2342 nmethod* code = task->code(); 2343 CompilerCounters* counters = thread->counters(); 2344 2345 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2346 MutexLocker locker(CompileStatistics_lock); 2347 2348 // _perf variables are production performance counters which are 2349 // updated regardless of the setting of the CITime and CITimeEach flags 2350 // 2351 2352 // account all time, including bailouts and failures in this counter; 2353 // C1 and C2 counters are counting both successful and unsuccessful compiles 2354 _t_total_compilation.add(time); 2355 2356 if (!success) { 2357 _total_bailout_count++; 2358 if (UsePerfData) { 2359 _perf_last_failed_method->set_value(counters->current_method()); 2360 _perf_last_failed_type->set_value(counters->compile_type()); 2361 _perf_total_bailout_count->inc(); 2362 } 2363 _t_bailedout_compilation.add(time); 2364 } else if (code == NULL) { 2365 if (UsePerfData) { 2366 _perf_last_invalidated_method->set_value(counters->current_method()); 2367 _perf_last_invalidated_type->set_value(counters->compile_type()); 2368 _perf_total_invalidated_count->inc(); 2369 } 2370 _total_invalidated_count++; 2371 _t_invalidated_compilation.add(time); 2372 } else { 2373 // Compilation succeeded 2374 2375 // update compilation ticks - used by the implementation of 2376 // java.lang.management.CompilationMBean 2377 _perf_total_compilation->inc(time.ticks()); 2378 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2379 2380 if (CITime) { 2381 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2382 if (is_osr) { 2383 _t_osr_compilation.add(time); 2384 _sum_osr_bytes_compiled += bytes_compiled; 2385 } else { 2386 _t_standard_compilation.add(time); 2387 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2388 } 2389 2390 #if INCLUDE_JVMCI 2391 AbstractCompiler* comp = compiler(task->comp_level()); 2392 if (comp) { 2393 CompilerStatistics* stats = comp->stats(); 2394 if (stats) { 2395 if (is_osr) { 2396 stats->_osr.update(time, bytes_compiled); 2397 } else { 2398 stats->_standard.update(time, bytes_compiled); 2399 } 2400 stats->_nmethods_size += code->total_size(); 2401 stats->_nmethods_code_size += code->insts_size(); 2402 } else { // if (!stats) 2403 assert(false, "Compiler statistics object must exist"); 2404 } 2405 } else { // if (!comp) 2406 assert(false, "Compiler object must exist"); 2407 } 2408 #endif // INCLUDE_JVMCI 2409 } 2410 2411 if (UsePerfData) { 2412 // save the name of the last method compiled 2413 _perf_last_method->set_value(counters->current_method()); 2414 _perf_last_compile_type->set_value(counters->compile_type()); 2415 _perf_last_compile_size->set_value(method->code_size() + 2416 task->num_inlined_bytecodes()); 2417 if (is_osr) { 2418 _perf_osr_compilation->inc(time.ticks()); 2419 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2420 } else { 2421 _perf_standard_compilation->inc(time.ticks()); 2422 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2423 } 2424 } 2425 2426 if (CITimeEach) { 2427 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2428 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2429 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2430 } 2431 2432 // Collect counts of successful compilations 2433 _sum_nmethod_size += code->total_size(); 2434 _sum_nmethod_code_size += code->insts_size(); 2435 _total_compile_count++; 2436 2437 if (UsePerfData) { 2438 _perf_sum_nmethod_size->inc( code->total_size()); 2439 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2440 _perf_total_compile_count->inc(); 2441 } 2442 2443 if (is_osr) { 2444 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2445 _total_osr_compile_count++; 2446 } else { 2447 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2448 _total_standard_compile_count++; 2449 } 2450 } 2451 // set the current method for the thread to null 2452 if (UsePerfData) counters->set_current_method(""); 2453 } 2454 2455 const char* CompileBroker::compiler_name(int comp_level) { 2456 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2457 if (comp == NULL) { 2458 return "no compiler"; 2459 } else { 2460 return (comp->name()); 2461 } 2462 } 2463 2464 #if INCLUDE_JVMCI 2465 void CompileBroker::print_times(AbstractCompiler* comp) { 2466 CompilerStatistics* stats = comp->stats(); 2467 if (stats) { 2468 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}", 2469 comp->name(), stats->bytes_per_second(), 2470 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2471 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2472 stats->_nmethods_size, stats->_nmethods_code_size); 2473 } else { // if (!stats) 2474 assert(false, "Compiler statistics object must exist"); 2475 } 2476 comp->print_timers(); 2477 } 2478 #endif // INCLUDE_JVMCI 2479 2480 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2481 #if INCLUDE_JVMCI 2482 elapsedTimer standard_compilation; 2483 elapsedTimer total_compilation; 2484 elapsedTimer osr_compilation; 2485 2486 int standard_bytes_compiled = 0; 2487 int osr_bytes_compiled = 0; 2488 2489 int standard_compile_count = 0; 2490 int osr_compile_count = 0; 2491 int total_compile_count = 0; 2492 2493 int nmethods_size = 0; 2494 int nmethods_code_size = 0; 2495 bool printedHeader = false; 2496 2497 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2498 AbstractCompiler* comp = _compilers[i]; 2499 if (comp != NULL) { 2500 if (per_compiler && aggregate && !printedHeader) { 2501 printedHeader = true; 2502 tty->cr(); 2503 tty->print_cr("Individual compiler times (for compiled methods only)"); 2504 tty->print_cr("------------------------------------------------"); 2505 tty->cr(); 2506 } 2507 CompilerStatistics* stats = comp->stats(); 2508 2509 if (stats) { 2510 standard_compilation.add(stats->_standard._time); 2511 osr_compilation.add(stats->_osr._time); 2512 2513 standard_bytes_compiled += stats->_standard._bytes; 2514 osr_bytes_compiled += stats->_osr._bytes; 2515 2516 standard_compile_count += stats->_standard._count; 2517 osr_compile_count += stats->_osr._count; 2518 2519 nmethods_size += stats->_nmethods_size; 2520 nmethods_code_size += stats->_nmethods_code_size; 2521 } else { // if (!stats) 2522 assert(false, "Compiler statistics object must exist"); 2523 } 2524 2525 if (per_compiler) { 2526 print_times(comp); 2527 } 2528 } 2529 } 2530 total_compile_count = osr_compile_count + standard_compile_count; 2531 total_compilation.add(osr_compilation); 2532 total_compilation.add(standard_compilation); 2533 2534 // In hosted mode, print the JVMCI compiler specific counters manually. 2535 if (!UseJVMCICompiler) { 2536 JVMCICompiler::print_compilation_timers(); 2537 } 2538 #else // INCLUDE_JVMCI 2539 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2540 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2541 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2542 2543 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2544 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2545 2546 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2547 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2548 int total_compile_count = CompileBroker::_total_compile_count; 2549 2550 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2551 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2552 #endif // INCLUDE_JVMCI 2553 2554 if (!aggregate) { 2555 return; 2556 } 2557 tty->cr(); 2558 tty->print_cr("Accumulated compiler times"); 2559 tty->print_cr("----------------------------------------------------------"); 2560 //0000000000111111111122222222223333333333444444444455555555556666666666 2561 //0123456789012345678901234567890123456789012345678901234567890123456789 2562 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2563 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2564 standard_compilation.seconds(), 2565 standard_compilation.seconds() / standard_compile_count); 2566 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2567 CompileBroker::_t_bailedout_compilation.seconds(), 2568 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2569 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2570 osr_compilation.seconds(), 2571 osr_compilation.seconds() / osr_compile_count); 2572 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2573 CompileBroker::_t_invalidated_compilation.seconds(), 2574 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2575 2576 AbstractCompiler *comp = compiler(CompLevel_simple); 2577 if (comp != NULL) { 2578 tty->cr(); 2579 comp->print_timers(); 2580 } 2581 comp = compiler(CompLevel_full_optimization); 2582 if (comp != NULL) { 2583 tty->cr(); 2584 comp->print_timers(); 2585 } 2586 tty->cr(); 2587 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2588 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2589 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2590 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2591 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2592 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2593 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2594 double tcs = total_compilation.seconds(); 2595 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2596 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2597 tty->cr(); 2598 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2599 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2600 } 2601 2602 // Print general/accumulated JIT information. 2603 void CompileBroker::print_info(outputStream *out) { 2604 if (out == NULL) out = tty; 2605 out->cr(); 2606 out->print_cr("======================"); 2607 out->print_cr(" General JIT info "); 2608 out->print_cr("======================"); 2609 out->cr(); 2610 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2611 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2612 out->cr(); 2613 out->print_cr("CodeCache overview"); 2614 out->print_cr("--------------------------------------------------------"); 2615 out->cr(); 2616 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2617 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2618 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2619 out->cr(); 2620 2621 out->cr(); 2622 out->print_cr("CodeCache cleaning overview"); 2623 out->print_cr("--------------------------------------------------------"); 2624 out->cr(); 2625 NMethodSweeper::print(out); 2626 out->print_cr("--------------------------------------------------------"); 2627 out->cr(); 2628 } 2629 2630 // Note: tty_lock must not be held upon entry to this function. 2631 // Print functions called from herein do "micro-locking" on tty_lock. 2632 // That's a tradeoff which keeps together important blocks of output. 2633 // At the same time, continuous tty_lock hold time is kept in check, 2634 // preventing concurrently printing threads from stalling a long time. 2635 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) { 2636 TimeStamp ts_total; 2637 TimeStamp ts_global; 2638 TimeStamp ts; 2639 2640 bool allFun = !strcmp(function, "all"); 2641 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2642 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2643 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2644 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2645 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2646 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2647 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2648 bool discard = !strcmp(function, "discard") || allFun; 2649 2650 if (out == NULL) { 2651 out = tty; 2652 } 2653 2654 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2655 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2656 out->cr(); 2657 return; 2658 } 2659 2660 ts_total.update(); // record starting point 2661 2662 if (aggregate) { 2663 print_info(out); 2664 } 2665 2666 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2667 // That prevents another thread from destroying our view on the CodeHeap. 2668 // When we request individual parts of the analysis via the jcmd interface, it is possible 2669 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2670 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2671 // across user interaction. 2672 // Acquire this lock before acquiring the CodeCache_lock. 2673 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2674 // leading to an unnecessarily long hold time of the CodeCache_lock. 2675 ts.update(); // record starting point 2676 MutexLocker mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2677 out->print_cr("\n__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________\n", ts.seconds()); 2678 2679 // If we serve an "allFun" call, it is beneficial to hold the CodeCache_lock 2680 // for the entire duration of aggregation and printing. That makes sure 2681 // we see a consistent picture and do not run into issues caused by 2682 // the CodeHeap being altered concurrently. 2683 Mutex* global_lock = allFun ? CodeCache_lock : NULL; 2684 Mutex* function_lock = allFun ? NULL : CodeCache_lock; 2685 ts_global.update(); // record starting point 2686 MutexLocker mu2(global_lock, Mutex::_no_safepoint_check_flag); 2687 if (global_lock != NULL) { 2688 out->print_cr("\n__ CodeCache (global) lock wait took %10.3f seconds _________\n", ts_global.seconds()); 2689 ts_global.update(); // record starting point 2690 } 2691 2692 if (aggregate) { 2693 ts.update(); // record starting point 2694 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag); 2695 if (function_lock != NULL) { 2696 out->print_cr("\n__ CodeCache (function) lock wait took %10.3f seconds _________\n", ts.seconds()); 2697 } 2698 2699 ts.update(); // record starting point 2700 CodeCache::aggregate(out, granularity); 2701 if (function_lock != NULL) { 2702 out->print_cr("\n__ CodeCache (function) lock hold took %10.3f seconds _________\n", ts.seconds()); 2703 } 2704 } 2705 2706 if (usedSpace) CodeCache::print_usedSpace(out); 2707 if (freeSpace) CodeCache::print_freeSpace(out); 2708 if (methodCount) CodeCache::print_count(out); 2709 if (methodSpace) CodeCache::print_space(out); 2710 if (methodAge) CodeCache::print_age(out); 2711 if (methodNames) { 2712 // print_names() has shown to be sensitive to concurrent CodeHeap modifications. 2713 // Therefore, request the CodeCache_lock before calling... 2714 MutexLocker mu3(function_lock, Mutex::_no_safepoint_check_flag); 2715 CodeCache::print_names(out); 2716 } 2717 if (discard) CodeCache::discard(out); 2718 2719 if (global_lock != NULL) { 2720 out->print_cr("\n__ CodeCache (global) lock hold took %10.3f seconds _________\n", ts_global.seconds()); 2721 } 2722 out->print_cr("\n__ CodeHeapStateAnalytics total duration %10.3f seconds _________\n", ts_total.seconds()); 2723 }