1 /* 2 * Copyright (c) 1999, 2017, 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 "classfile/symbolTable.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/codeCache.hpp" 30 #include "code/dependencyContext.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/compileLog.hpp" 33 #include "compiler/compilerOracle.hpp" 34 #include "compiler/directivesParser.hpp" 35 #include "interpreter/linkResolver.hpp" 36 #include "logging/log.hpp" 37 #include "logging/logStream.hpp" 38 #include "memory/allocation.inline.hpp" 39 #include "memory/resourceArea.hpp" 40 #include "oops/methodData.hpp" 41 #include "oops/method.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "prims/jvm.h" 44 #include "prims/nativeLookup.hpp" 45 #include "prims/whitebox.hpp" 46 #include "runtime/arguments.hpp" 47 #include "runtime/atomic.hpp" 48 #include "runtime/compilationPolicy.hpp" 49 #include "runtime/init.hpp" 50 #include "runtime/interfaceSupport.hpp" 51 #include "runtime/javaCalls.hpp" 52 #include "runtime/os.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/sweeper.hpp" 55 #include "runtime/timerTrace.hpp" 56 #include "trace/tracing.hpp" 57 #include "utilities/debug.hpp" 58 #include "utilities/dtrace.hpp" 59 #include "utilities/events.hpp" 60 #include "utilities/formatBuffer.hpp" 61 #ifdef COMPILER1 62 #include "c1/c1_Compiler.hpp" 63 #endif 64 #if INCLUDE_JVMCI 65 #include "jvmci/jvmciCompiler.hpp" 66 #include "jvmci/jvmciRuntime.hpp" 67 #include "jvmci/jvmciJavaClasses.hpp" 68 #include "runtime/vframe.hpp" 69 #endif 70 #ifdef COMPILER2 71 #include "opto/c2compiler.hpp" 72 #endif 73 #ifdef SHARK 74 #include "shark/sharkCompiler.hpp" 75 #endif 76 77 #ifdef DTRACE_ENABLED 78 79 // Only bother with this argument setup if dtrace is available 80 81 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 82 { \ 83 Symbol* klass_name = (method)->klass_name(); \ 84 Symbol* name = (method)->name(); \ 85 Symbol* signature = (method)->signature(); \ 86 HOTSPOT_METHOD_COMPILE_BEGIN( \ 87 (char *) comp_name, strlen(comp_name), \ 88 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 89 (char *) name->bytes(), name->utf8_length(), \ 90 (char *) signature->bytes(), signature->utf8_length()); \ 91 } 92 93 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 94 { \ 95 Symbol* klass_name = (method)->klass_name(); \ 96 Symbol* name = (method)->name(); \ 97 Symbol* signature = (method)->signature(); \ 98 HOTSPOT_METHOD_COMPILE_END( \ 99 (char *) comp_name, strlen(comp_name), \ 100 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 101 (char *) name->bytes(), name->utf8_length(), \ 102 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 103 } 104 105 #else // ndef DTRACE_ENABLED 106 107 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 108 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 109 110 #endif // ndef DTRACE_ENABLED 111 112 bool CompileBroker::_initialized = false; 113 volatile bool CompileBroker::_should_block = false; 114 volatile jint CompileBroker::_print_compilation_warning = 0; 115 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 116 117 // The installed compiler(s) 118 AbstractCompiler* CompileBroker::_compilers[2]; 119 120 // These counters are used to assign an unique ID to each compilation. 121 volatile jint CompileBroker::_compilation_id = 0; 122 volatile jint CompileBroker::_osr_compilation_id = 0; 123 124 // Debugging information 125 int CompileBroker::_last_compile_type = no_compile; 126 int CompileBroker::_last_compile_level = CompLevel_none; 127 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 128 129 // Performance counters 130 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 131 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 132 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 133 134 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 135 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 136 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 137 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 138 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 139 140 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 141 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 142 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 143 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 144 145 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 146 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 147 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 148 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 149 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 150 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 151 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 152 153 // Timers and counters for generating statistics 154 elapsedTimer CompileBroker::_t_total_compilation; 155 elapsedTimer CompileBroker::_t_osr_compilation; 156 elapsedTimer CompileBroker::_t_standard_compilation; 157 elapsedTimer CompileBroker::_t_invalidated_compilation; 158 elapsedTimer CompileBroker::_t_bailedout_compilation; 159 160 int CompileBroker::_total_bailout_count = 0; 161 int CompileBroker::_total_invalidated_count = 0; 162 int CompileBroker::_total_compile_count = 0; 163 int CompileBroker::_total_osr_compile_count = 0; 164 int CompileBroker::_total_standard_compile_count = 0; 165 166 int CompileBroker::_sum_osr_bytes_compiled = 0; 167 int CompileBroker::_sum_standard_bytes_compiled = 0; 168 int CompileBroker::_sum_nmethod_size = 0; 169 int CompileBroker::_sum_nmethod_code_size = 0; 170 171 long CompileBroker::_peak_compilation_time = 0; 172 173 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 174 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 175 176 177 178 class CompilationLog : public StringEventLog { 179 public: 180 CompilationLog() : StringEventLog("Compilation events") { 181 } 182 183 void log_compile(JavaThread* thread, CompileTask* task) { 184 StringLogMessage lm; 185 stringStream sstr = lm.stream(); 186 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 187 task->print(&sstr, NULL, true, false); 188 log(thread, "%s", (const char*)lm); 189 } 190 191 void log_nmethod(JavaThread* thread, nmethod* nm) { 192 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 193 nm->compile_id(), nm->is_osr_method() ? "%" : "", 194 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 195 } 196 197 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 198 StringLogMessage lm; 199 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 200 if (retry_message != NULL) { 201 lm.append(" (%s)", retry_message); 202 } 203 lm.print("\n"); 204 log(thread, "%s", (const char*)lm); 205 } 206 207 void log_metaspace_failure(const char* reason) { 208 ResourceMark rm; 209 StringLogMessage lm; 210 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 211 lm.print("\n"); 212 log(JavaThread::current(), "%s", (const char*)lm); 213 } 214 }; 215 216 static CompilationLog* _compilation_log = NULL; 217 218 bool compileBroker_init() { 219 if (LogEvents) { 220 _compilation_log = new CompilationLog(); 221 } 222 223 // init directives stack, adding default directive 224 DirectivesStack::init(); 225 226 if (DirectivesParser::has_file()) { 227 return DirectivesParser::parse_from_flag(); 228 } else if (CompilerDirectivesPrint) { 229 // Print default directive even when no other was added 230 DirectivesStack::print(tty); 231 } 232 233 return true; 234 } 235 236 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 237 CompilerThread* thread = CompilerThread::current(); 238 thread->set_task(task); 239 #if INCLUDE_JVMCI 240 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 241 task->set_jvmci_compiler_thread(thread); 242 } 243 #endif 244 CompileLog* log = thread->log(); 245 if (log != NULL) task->log_task_start(log); 246 } 247 248 CompileTaskWrapper::~CompileTaskWrapper() { 249 CompilerThread* thread = CompilerThread::current(); 250 CompileTask* task = thread->task(); 251 CompileLog* log = thread->log(); 252 if (log != NULL) task->log_task_done(log); 253 thread->set_task(NULL); 254 task->set_code_handle(NULL); 255 thread->set_env(NULL); 256 if (task->is_blocking()) { 257 bool free_task = false; 258 { 259 MutexLocker notifier(task->lock(), thread); 260 task->mark_complete(); 261 #if INCLUDE_JVMCI 262 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 263 if (!task->has_waiter()) { 264 // The waiting thread timed out and thus did not free the task. 265 free_task = true; 266 } 267 task->set_jvmci_compiler_thread(NULL); 268 } 269 #endif 270 if (!free_task) { 271 // Notify the waiting thread that the compilation has completed 272 // so that it can free the task. 273 task->lock()->notify_all(); 274 } 275 } 276 if (free_task) { 277 // The task can only be freed once the task lock is released. 278 CompileTask::free(task); 279 } 280 } else { 281 task->mark_complete(); 282 283 // By convention, the compiling thread is responsible for 284 // recycling a non-blocking CompileTask. 285 CompileTask::free(task); 286 } 287 } 288 289 /** 290 * Add a CompileTask to a CompileQueue. 291 */ 292 void CompileQueue::add(CompileTask* task) { 293 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 294 295 task->set_next(NULL); 296 task->set_prev(NULL); 297 298 if (_last == NULL) { 299 // The compile queue is empty. 300 assert(_first == NULL, "queue is empty"); 301 _first = task; 302 _last = task; 303 } else { 304 // Append the task to the queue. 305 assert(_last->next() == NULL, "not last"); 306 _last->set_next(task); 307 task->set_prev(_last); 308 _last = task; 309 } 310 ++_size; 311 312 // Mark the method as being in the compile queue. 313 task->method()->set_queued_for_compilation(); 314 315 if (CIPrintCompileQueue) { 316 print_tty(); 317 } 318 319 if (LogCompilation && xtty != NULL) { 320 task->log_task_queued(); 321 } 322 323 // Notify CompilerThreads that a task is available. 324 MethodCompileQueue_lock->notify_all(); 325 } 326 327 /** 328 * Empties compilation queue by putting all compilation tasks onto 329 * a freelist. Furthermore, the method wakes up all threads that are 330 * waiting on a compilation task to finish. This can happen if background 331 * compilation is disabled. 332 */ 333 void CompileQueue::free_all() { 334 MutexLocker mu(MethodCompileQueue_lock); 335 CompileTask* next = _first; 336 337 // Iterate over all tasks in the compile queue 338 while (next != NULL) { 339 CompileTask* current = next; 340 next = current->next(); 341 { 342 // Wake up thread that blocks on the compile task. 343 MutexLocker ct_lock(current->lock()); 344 current->lock()->notify(); 345 } 346 // Put the task back on the freelist. 347 CompileTask::free(current); 348 } 349 _first = NULL; 350 351 // Wake up all threads that block on the queue. 352 MethodCompileQueue_lock->notify_all(); 353 } 354 355 /** 356 * Get the next CompileTask from a CompileQueue 357 */ 358 CompileTask* CompileQueue::get() { 359 // save methods from RedefineClasses across safepoint 360 // across MethodCompileQueue_lock below. 361 methodHandle save_method; 362 methodHandle save_hot_method; 363 364 MutexLocker locker(MethodCompileQueue_lock); 365 // If _first is NULL we have no more compile jobs. There are two reasons for 366 // having no compile jobs: First, we compiled everything we wanted. Second, 367 // we ran out of code cache so compilation has been disabled. In the latter 368 // case we perform code cache sweeps to free memory such that we can re-enable 369 // compilation. 370 while (_first == NULL) { 371 // Exit loop if compilation is disabled forever 372 if (CompileBroker::is_compilation_disabled_forever()) { 373 return NULL; 374 } 375 376 // If there are no compilation tasks and we can compile new jobs 377 // (i.e., there is enough free space in the code cache) there is 378 // no need to invoke the sweeper. As a result, the hotness of methods 379 // remains unchanged. This behavior is desired, since we want to keep 380 // the stable state, i.e., we do not want to evict methods from the 381 // code cache if it is unnecessary. 382 // We need a timed wait here, since compiler threads can exit if compilation 383 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 384 // is not critical and we do not want idle compiler threads to wake up too often. 385 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 386 } 387 388 if (CompileBroker::is_compilation_disabled_forever()) { 389 return NULL; 390 } 391 392 CompileTask* task; 393 { 394 NoSafepointVerifier nsv; 395 task = CompilationPolicy::policy()->select_task(this); 396 } 397 398 if (task != NULL) { 399 // Save method pointers across unlock safepoint. The task is removed from 400 // the compilation queue, which is walked during RedefineClasses. 401 save_method = methodHandle(task->method()); 402 save_hot_method = methodHandle(task->hot_method()); 403 404 remove(task); 405 purge_stale_tasks(); // may temporarily release MCQ lock 406 } 407 408 return task; 409 } 410 411 // Clean & deallocate stale compile tasks. 412 // Temporarily releases MethodCompileQueue lock. 413 void CompileQueue::purge_stale_tasks() { 414 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 415 if (_first_stale != NULL) { 416 // Stale tasks are purged when MCQ lock is released, 417 // but _first_stale updates are protected by MCQ lock. 418 // Once task processing starts and MCQ lock is released, 419 // other compiler threads can reuse _first_stale. 420 CompileTask* head = _first_stale; 421 _first_stale = NULL; 422 { 423 MutexUnlocker ul(MethodCompileQueue_lock); 424 for (CompileTask* task = head; task != NULL; ) { 425 CompileTask* next_task = task->next(); 426 CompileTaskWrapper ctw(task); // Frees the task 427 task->set_failure_reason("stale task"); 428 task = next_task; 429 } 430 } 431 } 432 } 433 434 void CompileQueue::remove(CompileTask* task) { 435 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 436 if (task->prev() != NULL) { 437 task->prev()->set_next(task->next()); 438 } else { 439 // max is the first element 440 assert(task == _first, "Sanity"); 441 _first = task->next(); 442 } 443 444 if (task->next() != NULL) { 445 task->next()->set_prev(task->prev()); 446 } else { 447 // max is the last element 448 assert(task == _last, "Sanity"); 449 _last = task->prev(); 450 } 451 --_size; 452 } 453 454 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 455 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 456 remove(task); 457 458 // Enqueue the task for reclamation (should be done outside MCQ lock) 459 task->set_next(_first_stale); 460 task->set_prev(NULL); 461 _first_stale = task; 462 } 463 464 // methods in the compile queue need to be marked as used on the stack 465 // so that they don't get reclaimed by Redefine Classes 466 void CompileQueue::mark_on_stack() { 467 CompileTask* task = _first; 468 while (task != NULL) { 469 task->mark_on_stack(); 470 task = task->next(); 471 } 472 } 473 474 475 CompileQueue* CompileBroker::compile_queue(int comp_level) { 476 if (is_c2_compile(comp_level)) return _c2_compile_queue; 477 if (is_c1_compile(comp_level)) return _c1_compile_queue; 478 return NULL; 479 } 480 481 void CompileBroker::print_compile_queues(outputStream* st) { 482 st->print_cr("Current compiles: "); 483 MutexLocker locker(MethodCompileQueue_lock); 484 485 char buf[2000]; 486 int buflen = sizeof(buf); 487 Threads::print_threads_compiling(st, buf, buflen); 488 489 st->cr(); 490 if (_c1_compile_queue != NULL) { 491 _c1_compile_queue->print(st); 492 } 493 if (_c2_compile_queue != NULL) { 494 _c2_compile_queue->print(st); 495 } 496 } 497 498 void CompileQueue::print(outputStream* st) { 499 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 500 st->print_cr("%s:", name()); 501 CompileTask* task = _first; 502 if (task == NULL) { 503 st->print_cr("Empty"); 504 } else { 505 while (task != NULL) { 506 task->print(st, NULL, true, true); 507 task = task->next(); 508 } 509 } 510 st->cr(); 511 } 512 513 void CompileQueue::print_tty() { 514 ttyLocker ttyl; 515 print(tty); 516 } 517 518 CompilerCounters::CompilerCounters() { 519 _current_method[0] = '\0'; 520 _compile_type = CompileBroker::no_compile; 521 } 522 523 // ------------------------------------------------------------------ 524 // CompileBroker::compilation_init 525 // 526 // Initialize the Compilation object 527 void CompileBroker::compilation_init(TRAPS) { 528 _last_method_compiled[0] = '\0'; 529 530 // No need to initialize compilation system if we do not use it. 531 if (!UseCompiler) { 532 return; 533 } 534 #ifndef SHARK 535 // Set the interface to the current compiler(s). 536 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 537 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 538 539 #if INCLUDE_JVMCI 540 if (EnableJVMCI) { 541 // This is creating a JVMCICompiler singleton. 542 JVMCICompiler* jvmci = new JVMCICompiler(); 543 544 if (UseJVMCICompiler) { 545 _compilers[1] = jvmci; 546 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 547 if (BootstrapJVMCI) { 548 // JVMCI will bootstrap so give it more threads 549 c2_count = MIN2(32, os::active_processor_count()); 550 } 551 } else { 552 c2_count = JVMCIThreads; 553 } 554 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 555 } else { 556 c1_count = JVMCIHostThreads; 557 } 558 } 559 } 560 #endif // INCLUDE_JVMCI 561 562 #ifdef COMPILER1 563 if (c1_count > 0) { 564 _compilers[0] = new Compiler(); 565 } 566 #endif // COMPILER1 567 568 #ifdef COMPILER2 569 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 570 if (c2_count > 0) { 571 _compilers[1] = new C2Compiler(); 572 } 573 } 574 #endif // COMPILER2 575 576 #else // SHARK 577 int c1_count = 0; 578 int c2_count = 1; 579 580 _compilers[1] = new SharkCompiler(); 581 #endif // SHARK 582 583 // Start the compiler thread(s) and the sweeper thread 584 init_compiler_sweeper_threads(c1_count, c2_count); 585 // totalTime performance counter is always created as it is required 586 // by the implementation of java.lang.management.CompilationMBean. 587 { 588 EXCEPTION_MARK; 589 _perf_total_compilation = 590 PerfDataManager::create_counter(JAVA_CI, "totalTime", 591 PerfData::U_Ticks, CHECK); 592 } 593 594 if (UsePerfData) { 595 596 EXCEPTION_MARK; 597 598 // create the jvmstat performance counters 599 _perf_osr_compilation = 600 PerfDataManager::create_counter(SUN_CI, "osrTime", 601 PerfData::U_Ticks, CHECK); 602 603 _perf_standard_compilation = 604 PerfDataManager::create_counter(SUN_CI, "standardTime", 605 PerfData::U_Ticks, CHECK); 606 607 _perf_total_bailout_count = 608 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 609 PerfData::U_Events, CHECK); 610 611 _perf_total_invalidated_count = 612 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 613 PerfData::U_Events, CHECK); 614 615 _perf_total_compile_count = 616 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 617 PerfData::U_Events, CHECK); 618 _perf_total_osr_compile_count = 619 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 620 PerfData::U_Events, CHECK); 621 622 _perf_total_standard_compile_count = 623 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 624 PerfData::U_Events, CHECK); 625 626 _perf_sum_osr_bytes_compiled = 627 PerfDataManager::create_counter(SUN_CI, "osrBytes", 628 PerfData::U_Bytes, CHECK); 629 630 _perf_sum_standard_bytes_compiled = 631 PerfDataManager::create_counter(SUN_CI, "standardBytes", 632 PerfData::U_Bytes, CHECK); 633 634 _perf_sum_nmethod_size = 635 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 636 PerfData::U_Bytes, CHECK); 637 638 _perf_sum_nmethod_code_size = 639 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 640 PerfData::U_Bytes, CHECK); 641 642 _perf_last_method = 643 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 644 CompilerCounters::cmname_buffer_length, 645 "", CHECK); 646 647 _perf_last_failed_method = 648 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 649 CompilerCounters::cmname_buffer_length, 650 "", CHECK); 651 652 _perf_last_invalidated_method = 653 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 654 CompilerCounters::cmname_buffer_length, 655 "", CHECK); 656 657 _perf_last_compile_type = 658 PerfDataManager::create_variable(SUN_CI, "lastType", 659 PerfData::U_None, 660 (jlong)CompileBroker::no_compile, 661 CHECK); 662 663 _perf_last_compile_size = 664 PerfDataManager::create_variable(SUN_CI, "lastSize", 665 PerfData::U_Bytes, 666 (jlong)CompileBroker::no_compile, 667 CHECK); 668 669 670 _perf_last_failed_type = 671 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 672 PerfData::U_None, 673 (jlong)CompileBroker::no_compile, 674 CHECK); 675 676 _perf_last_invalidated_type = 677 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 678 PerfData::U_None, 679 (jlong)CompileBroker::no_compile, 680 CHECK); 681 } 682 683 _initialized = true; 684 } 685 686 687 JavaThread* CompileBroker::make_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, 688 AbstractCompiler* comp, bool compiler_thread, TRAPS) { 689 JavaThread* thread = NULL; 690 Klass* k = SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), true, CHECK_0); 691 InstanceKlass* klass = InstanceKlass::cast(k); 692 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 693 Handle string = java_lang_String::create_from_str(name, CHECK_0); 694 695 // Initialize thread_oop to put it into the system threadGroup 696 Handle thread_group (THREAD, Universe::system_thread_group()); 697 JavaValue result(T_VOID); 698 JavaCalls::call_special(&result, thread_oop, 699 klass, 700 vmSymbols::object_initializer_name(), 701 vmSymbols::threadgroup_string_void_signature(), 702 thread_group, 703 string, 704 CHECK_0); 705 706 { 707 MutexLocker mu(Threads_lock, THREAD); 708 if (compiler_thread) { 709 thread = new CompilerThread(queue, counters); 710 } else { 711 thread = new CodeCacheSweeperThread(); 712 } 713 // At this point the new CompilerThread data-races with this startup 714 // thread (which I believe is the primoridal thread and NOT the VM 715 // thread). This means Java bytecodes being executed at startup can 716 // queue compile jobs which will run at whatever default priority the 717 // newly created CompilerThread runs at. 718 719 720 // At this point it may be possible that no osthread was created for the 721 // JavaThread due to lack of memory. We would have to throw an exception 722 // in that case. However, since this must work and we do not allow 723 // exceptions anyway, check and abort if this fails. But first release the 724 // lock. 725 726 if (thread != NULL && thread->osthread() != NULL) { 727 728 java_lang_Thread::set_thread(thread_oop(), thread); 729 730 // Note that this only sets the JavaThread _priority field, which by 731 // definition is limited to Java priorities and not OS priorities. 732 // The os-priority is set in the CompilerThread startup code itself 733 734 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 735 736 // Note that we cannot call os::set_priority because it expects Java 737 // priorities and we are *explicitly* using OS priorities so that it's 738 // possible to set the compiler thread priority higher than any Java 739 // thread. 740 741 int native_prio = CompilerThreadPriority; 742 if (native_prio == -1) { 743 if (UseCriticalCompilerThreadPriority) { 744 native_prio = os::java_to_os_priority[CriticalPriority]; 745 } else { 746 native_prio = os::java_to_os_priority[NearMaxPriority]; 747 } 748 } 749 os::set_native_priority(thread, native_prio); 750 751 java_lang_Thread::set_daemon(thread_oop()); 752 753 thread->set_threadObj(thread_oop()); 754 if (compiler_thread) { 755 thread->as_CompilerThread()->set_compiler(comp); 756 } 757 Threads::add(thread); 758 Thread::start(thread); 759 } 760 } 761 762 // First release lock before aborting VM. 763 if (thread == NULL || thread->osthread() == NULL) { 764 vm_exit_during_initialization("java.lang.OutOfMemoryError", 765 os::native_thread_creation_failed_msg()); 766 } 767 768 // Let go of Threads_lock before yielding 769 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 770 771 return thread; 772 } 773 774 775 void CompileBroker::init_compiler_sweeper_threads(int c1_compiler_count, int c2_compiler_count) { 776 EXCEPTION_MARK; 777 #if !defined(ZERO) && !defined(SHARK) 778 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 779 #endif // !ZERO && !SHARK 780 // Initialize the compilation queue 781 if (c2_compiler_count > 0) { 782 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 783 _c2_compile_queue = new CompileQueue(name); 784 _compilers[1]->set_num_compiler_threads(c2_compiler_count); 785 } 786 if (c1_compiler_count > 0) { 787 _c1_compile_queue = new CompileQueue("C1 compile queue"); 788 _compilers[0]->set_num_compiler_threads(c1_compiler_count); 789 } 790 791 int compiler_count = c1_compiler_count + c2_compiler_count; 792 793 char name_buffer[256]; 794 const bool compiler_thread = true; 795 for (int i = 0; i < c2_compiler_count; i++) { 796 // Create a name for our thread. 797 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 798 CompilerCounters* counters = new CompilerCounters(); 799 // Shark and C2 800 make_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], compiler_thread, CHECK); 801 } 802 803 for (int i = c2_compiler_count; i < compiler_count; i++) { 804 // Create a name for our thread. 805 sprintf(name_buffer, "C1 CompilerThread%d", i); 806 CompilerCounters* counters = new CompilerCounters(); 807 // C1 808 make_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], compiler_thread, CHECK); 809 } 810 811 if (UsePerfData) { 812 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK); 813 } 814 815 if (MethodFlushing) { 816 // Initialize the sweeper thread 817 make_thread("Sweeper thread", NULL, NULL, NULL, false, CHECK); 818 } 819 } 820 821 822 /** 823 * Set the methods on the stack as on_stack so that redefine classes doesn't 824 * reclaim them. This method is executed at a safepoint. 825 */ 826 void CompileBroker::mark_on_stack() { 827 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 828 // Since we are at a safepoint, we do not need a lock to access 829 // the compile queues. 830 if (_c2_compile_queue != NULL) { 831 _c2_compile_queue->mark_on_stack(); 832 } 833 if (_c1_compile_queue != NULL) { 834 _c1_compile_queue->mark_on_stack(); 835 } 836 } 837 838 // ------------------------------------------------------------------ 839 // CompileBroker::compile_method 840 // 841 // Request compilation of a method. 842 void CompileBroker::compile_method_base(const methodHandle& method, 843 int osr_bci, 844 int comp_level, 845 const methodHandle& hot_method, 846 int hot_count, 847 CompileTask::CompileReason compile_reason, 848 bool blocking, 849 Thread* thread) { 850 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 851 assert(method->method_holder()->is_instance_klass(), 852 "sanity check"); 853 assert(!method->method_holder()->is_not_initialized(), 854 "method holder must be initialized"); 855 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 856 857 if (CIPrintRequests) { 858 tty->print("request: "); 859 method->print_short_name(tty); 860 if (osr_bci != InvocationEntryBci) { 861 tty->print(" osr_bci: %d", osr_bci); 862 } 863 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 864 if (!hot_method.is_null()) { 865 tty->print(" hot: "); 866 if (hot_method() != method()) { 867 hot_method->print_short_name(tty); 868 } else { 869 tty->print("yes"); 870 } 871 } 872 tty->cr(); 873 } 874 875 // A request has been made for compilation. Before we do any 876 // real work, check to see if the method has been compiled 877 // in the meantime with a definitive result. 878 if (compilation_is_complete(method, osr_bci, comp_level)) { 879 return; 880 } 881 882 #ifndef PRODUCT 883 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 884 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 885 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 886 return; 887 } 888 } 889 #endif 890 891 // If this method is already in the compile queue, then 892 // we do not block the current thread. 893 if (compilation_is_in_queue(method)) { 894 // We may want to decay our counter a bit here to prevent 895 // multiple denied requests for compilation. This is an 896 // open compilation policy issue. Note: The other possibility, 897 // in the case that this is a blocking compile request, is to have 898 // all subsequent blocking requesters wait for completion of 899 // ongoing compiles. Note that in this case we'll need a protocol 900 // for freeing the associated compile tasks. [Or we could have 901 // a single static monitor on which all these waiters sleep.] 902 return; 903 } 904 905 if (TieredCompilation) { 906 // Tiered policy requires MethodCounters to exist before adding a method to 907 // the queue. Create if we don't have them yet. 908 method->get_method_counters(thread); 909 } 910 911 // Outputs from the following MutexLocker block: 912 CompileTask* task = NULL; 913 CompileQueue* queue = compile_queue(comp_level); 914 915 // Acquire our lock. 916 { 917 MutexLocker locker(MethodCompileQueue_lock, thread); 918 919 // Make sure the method has not slipped into the queues since 920 // last we checked; note that those checks were "fast bail-outs". 921 // Here we need to be more careful, see 14012000 below. 922 if (compilation_is_in_queue(method)) { 923 return; 924 } 925 926 // We need to check again to see if the compilation has 927 // completed. A previous compilation may have registered 928 // some result. 929 if (compilation_is_complete(method, osr_bci, comp_level)) { 930 return; 931 } 932 933 // We now know that this compilation is not pending, complete, 934 // or prohibited. Assign a compile_id to this compilation 935 // and check to see if it is in our [Start..Stop) range. 936 int compile_id = assign_compile_id(method, osr_bci); 937 if (compile_id == 0) { 938 // The compilation falls outside the allowed range. 939 return; 940 } 941 942 #if INCLUDE_JVMCI 943 if (UseJVMCICompiler) { 944 if (blocking) { 945 // Don't allow blocking compiles for requests triggered by JVMCI. 946 if (thread->is_Compiler_thread()) { 947 blocking = false; 948 } 949 950 // Don't allow blocking compiles if inside a class initializer or while performing class loading 951 vframeStream vfst((JavaThread*) thread); 952 for (; !vfst.at_end(); vfst.next()) { 953 if (vfst.method()->is_static_initializer() || 954 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 955 vfst.method()->name() == vmSymbols::loadClass_name())) { 956 blocking = false; 957 break; 958 } 959 } 960 961 // Don't allow blocking compilation requests to JVMCI 962 // if JVMCI itself is not yet initialized 963 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 964 blocking = false; 965 } 966 967 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 968 // to avoid deadlock between compiler thread(s) and threads run at shutdown 969 // such as the DestroyJavaVM thread. 970 if (JVMCIRuntime::shutdown_called()) { 971 blocking = false; 972 } 973 } 974 } 975 #endif // INCLUDE_JVMCI 976 977 // We will enter the compilation in the queue. 978 // 14012000: Note that this sets the queued_for_compile bits in 979 // the target method. We can now reason that a method cannot be 980 // queued for compilation more than once, as follows: 981 // Before a thread queues a task for compilation, it first acquires 982 // the compile queue lock, then checks if the method's queued bits 983 // are set or it has already been compiled. Thus there can not be two 984 // instances of a compilation task for the same method on the 985 // compilation queue. Consider now the case where the compilation 986 // thread has already removed a task for that method from the queue 987 // and is in the midst of compiling it. In this case, the 988 // queued_for_compile bits must be set in the method (and these 989 // will be visible to the current thread, since the bits were set 990 // under protection of the compile queue lock, which we hold now. 991 // When the compilation completes, the compiler thread first sets 992 // the compilation result and then clears the queued_for_compile 993 // bits. Neither of these actions are protected by a barrier (or done 994 // under the protection of a lock), so the only guarantee we have 995 // (on machines with TSO (Total Store Order)) is that these values 996 // will update in that order. As a result, the only combinations of 997 // these bits that the current thread will see are, in temporal order: 998 // <RESULT, QUEUE> : 999 // <0, 1> : in compile queue, but not yet compiled 1000 // <1, 1> : compiled but queue bit not cleared 1001 // <1, 0> : compiled and queue bit cleared 1002 // Because we first check the queue bits then check the result bits, 1003 // we are assured that we cannot introduce a duplicate task. 1004 // Note that if we did the tests in the reverse order (i.e. check 1005 // result then check queued bit), we could get the result bit before 1006 // the compilation completed, and the queue bit after the compilation 1007 // completed, and end up introducing a "duplicate" (redundant) task. 1008 // In that case, the compiler thread should first check if a method 1009 // has already been compiled before trying to compile it. 1010 // NOTE: in the event that there are multiple compiler threads and 1011 // there is de-optimization/recompilation, things will get hairy, 1012 // and in that case it's best to protect both the testing (here) of 1013 // these bits, and their updating (here and elsewhere) under a 1014 // common lock. 1015 task = create_compile_task(queue, 1016 compile_id, method, 1017 osr_bci, comp_level, 1018 hot_method, hot_count, compile_reason, 1019 blocking); 1020 } 1021 1022 if (blocking) { 1023 wait_for_completion(task); 1024 } 1025 } 1026 1027 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1028 int comp_level, 1029 const methodHandle& hot_method, int hot_count, 1030 CompileTask::CompileReason compile_reason, 1031 Thread* THREAD) { 1032 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1033 if (!_initialized || comp_level == CompLevel_none) { 1034 return NULL; 1035 } 1036 1037 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1038 assert(comp != NULL, "Ensure we have a compiler"); 1039 1040 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1041 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1042 DirectivesStack::release(directive); 1043 return nm; 1044 } 1045 1046 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1047 int comp_level, 1048 const methodHandle& hot_method, int hot_count, 1049 CompileTask::CompileReason compile_reason, 1050 DirectiveSet* directive, 1051 Thread* THREAD) { 1052 1053 // make sure arguments make sense 1054 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1055 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1056 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1057 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1058 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1059 // allow any levels for WhiteBox 1060 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1061 // return quickly if possible 1062 1063 // lock, make sure that the compilation 1064 // isn't prohibited in a straightforward way. 1065 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1066 if (comp == NULL || !comp->can_compile_method(method) || 1067 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1068 return NULL; 1069 } 1070 1071 #if INCLUDE_JVMCI 1072 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { 1073 return NULL; 1074 } 1075 #endif 1076 1077 if (osr_bci == InvocationEntryBci) { 1078 // standard compilation 1079 CompiledMethod* method_code = method->code(); 1080 if (method_code != NULL && method_code->is_nmethod()) { 1081 if (compilation_is_complete(method, osr_bci, comp_level)) { 1082 return (nmethod*) method_code; 1083 } 1084 } 1085 if (method->is_not_compilable(comp_level)) { 1086 return NULL; 1087 } 1088 } else { 1089 // osr compilation 1090 #ifndef TIERED 1091 // seems like an assert of dubious value 1092 assert(comp_level == CompLevel_highest_tier, 1093 "all OSR compiles are assumed to be at a single compilation level"); 1094 #endif // TIERED 1095 // We accept a higher level osr method 1096 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1097 if (nm != NULL) return nm; 1098 if (method->is_not_osr_compilable(comp_level)) return NULL; 1099 } 1100 1101 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1102 // some prerequisites that are compiler specific 1103 if (comp->is_c2() || comp->is_shark()) { 1104 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1105 // Resolve all classes seen in the signature of the method 1106 // we are compiling. 1107 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1108 } 1109 1110 // If the method is native, do the lookup in the thread requesting 1111 // the compilation. Native lookups can load code, which is not 1112 // permitted during compilation. 1113 // 1114 // Note: A native method implies non-osr compilation which is 1115 // checked with an assertion at the entry of this method. 1116 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1117 bool in_base_library; 1118 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1119 if (HAS_PENDING_EXCEPTION) { 1120 // In case of an exception looking up the method, we just forget 1121 // about it. The interpreter will kick-in and throw the exception. 1122 method->set_not_compilable(); // implies is_not_osr_compilable() 1123 CLEAR_PENDING_EXCEPTION; 1124 return NULL; 1125 } 1126 assert(method->has_native_function(), "must have native code by now"); 1127 } 1128 1129 // RedefineClasses() has replaced this method; just return 1130 if (method->is_old()) { 1131 return NULL; 1132 } 1133 1134 // JVMTI -- post_compile_event requires jmethod_id() that may require 1135 // a lock the compiling thread can not acquire. Prefetch it here. 1136 if (JvmtiExport::should_post_compiled_method_load()) { 1137 method->jmethod_id(); 1138 } 1139 1140 // do the compilation 1141 if (method->is_native()) { 1142 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1143 // The following native methods: 1144 // 1145 // java.lang.Float.intBitsToFloat 1146 // java.lang.Float.floatToRawIntBits 1147 // java.lang.Double.longBitsToDouble 1148 // java.lang.Double.doubleToRawLongBits 1149 // 1150 // are called through the interpreter even if interpreter native stubs 1151 // are not preferred (i.e., calling through adapter handlers is preferred). 1152 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1153 // if the version of the methods from the native libraries is called. 1154 // As the interpreter and the C2-intrinsified version of the methods preserves 1155 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1156 if ((UseSSE >= 1 && 1157 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1158 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1159 (UseSSE >= 2 && 1160 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1161 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1162 return NULL; 1163 } 1164 1165 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1166 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1167 // 1168 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1169 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1170 AdapterHandlerLibrary::create_native_wrapper(method); 1171 } else { 1172 return NULL; 1173 } 1174 } else { 1175 // If the compiler is shut off due to code cache getting full 1176 // fail out now so blocking compiles dont hang the java thread 1177 if (!should_compile_new_jobs()) { 1178 CompilationPolicy::policy()->delay_compilation(method()); 1179 return NULL; 1180 } 1181 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; 1182 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1183 } 1184 1185 // return requested nmethod 1186 // We accept a higher level osr method 1187 if (osr_bci == InvocationEntryBci) { 1188 CompiledMethod* code = method->code(); 1189 if (code == NULL) { 1190 return (nmethod*) code; 1191 } else { 1192 return code->as_nmethod_or_null(); 1193 } 1194 } 1195 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1196 } 1197 1198 1199 // ------------------------------------------------------------------ 1200 // CompileBroker::compilation_is_complete 1201 // 1202 // See if compilation of this method is already complete. 1203 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1204 int osr_bci, 1205 int comp_level) { 1206 bool is_osr = (osr_bci != standard_entry_bci); 1207 if (is_osr) { 1208 if (method->is_not_osr_compilable(comp_level)) { 1209 return true; 1210 } else { 1211 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1212 return (result != NULL); 1213 } 1214 } else { 1215 if (method->is_not_compilable(comp_level)) { 1216 return true; 1217 } else { 1218 CompiledMethod* result = method->code(); 1219 if (result == NULL) return false; 1220 return comp_level == result->comp_level(); 1221 } 1222 } 1223 } 1224 1225 1226 /** 1227 * See if this compilation is already requested. 1228 * 1229 * Implementation note: there is only a single "is in queue" bit 1230 * for each method. This means that the check below is overly 1231 * conservative in the sense that an osr compilation in the queue 1232 * will block a normal compilation from entering the queue (and vice 1233 * versa). This can be remedied by a full queue search to disambiguate 1234 * cases. If it is deemed profitable, this may be done. 1235 */ 1236 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1237 return method->queued_for_compilation(); 1238 } 1239 1240 // ------------------------------------------------------------------ 1241 // CompileBroker::compilation_is_prohibited 1242 // 1243 // See if this compilation is not allowed. 1244 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1245 bool is_native = method->is_native(); 1246 // Some compilers may not support the compilation of natives. 1247 AbstractCompiler *comp = compiler(comp_level); 1248 if (is_native && 1249 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1250 method->set_not_compilable_quietly(comp_level); 1251 return true; 1252 } 1253 1254 bool is_osr = (osr_bci != standard_entry_bci); 1255 // Some compilers may not support on stack replacement. 1256 if (is_osr && 1257 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1258 method->set_not_osr_compilable(comp_level); 1259 return true; 1260 } 1261 1262 // The method may be explicitly excluded by the user. 1263 double scale; 1264 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1265 bool quietly = CompilerOracle::should_exclude_quietly(); 1266 if (PrintCompilation && !quietly) { 1267 // This does not happen quietly... 1268 ResourceMark rm; 1269 tty->print("### Excluding %s:%s", 1270 method->is_native() ? "generation of native wrapper" : "compile", 1271 (method->is_static() ? " static" : "")); 1272 method->print_short_name(tty); 1273 tty->cr(); 1274 } 1275 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1276 } 1277 1278 return false; 1279 } 1280 1281 /** 1282 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1283 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1284 * The function also allows to generate separate compilation IDs for OSR compilations. 1285 */ 1286 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1287 #ifdef ASSERT 1288 bool is_osr = (osr_bci != standard_entry_bci); 1289 int id; 1290 if (method->is_native()) { 1291 assert(!is_osr, "can't be osr"); 1292 // Adapters, native wrappers and method handle intrinsics 1293 // should be generated always. 1294 return Atomic::add(1, &_compilation_id); 1295 } else if (CICountOSR && is_osr) { 1296 id = Atomic::add(1, &_osr_compilation_id); 1297 if (CIStartOSR <= id && id < CIStopOSR) { 1298 return id; 1299 } 1300 } else { 1301 id = Atomic::add(1, &_compilation_id); 1302 if (CIStart <= id && id < CIStop) { 1303 return id; 1304 } 1305 } 1306 1307 // Method was not in the appropriate compilation range. 1308 method->set_not_compilable_quietly(); 1309 return 0; 1310 #else 1311 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1312 // only _compilation_id is incremented. 1313 return Atomic::add(1, &_compilation_id); 1314 #endif 1315 } 1316 1317 // ------------------------------------------------------------------ 1318 // CompileBroker::assign_compile_id_unlocked 1319 // 1320 // Public wrapper for assign_compile_id that acquires the needed locks 1321 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1322 MutexLocker locker(MethodCompileQueue_lock, thread); 1323 return assign_compile_id(method, osr_bci); 1324 } 1325 1326 // ------------------------------------------------------------------ 1327 // CompileBroker::preload_classes 1328 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1329 // Move this code over from c1_Compiler.cpp 1330 ShouldNotReachHere(); 1331 } 1332 1333 1334 // ------------------------------------------------------------------ 1335 // CompileBroker::create_compile_task 1336 // 1337 // Create a CompileTask object representing the current request for 1338 // compilation. Add this task to the queue. 1339 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1340 int compile_id, 1341 const methodHandle& method, 1342 int osr_bci, 1343 int comp_level, 1344 const methodHandle& hot_method, 1345 int hot_count, 1346 CompileTask::CompileReason compile_reason, 1347 bool blocking) { 1348 CompileTask* new_task = CompileTask::allocate(); 1349 new_task->initialize(compile_id, method, osr_bci, comp_level, 1350 hot_method, hot_count, compile_reason, 1351 blocking); 1352 queue->add(new_task); 1353 return new_task; 1354 } 1355 1356 #if INCLUDE_JVMCI 1357 // The number of milliseconds to wait before checking if 1358 // JVMCI compilation has made progress. 1359 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 500; 1360 1361 // The number of JVMCI compilation progress checks that must fail 1362 // before unblocking a thread waiting for a blocking compilation. 1363 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 5; 1364 1365 /** 1366 * Waits for a JVMCI compiler to complete a given task. This thread 1367 * waits until either the task completes or it sees no JVMCI compilation 1368 * progress for N consecutive milliseconds where N is 1369 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1370 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1371 * 1372 * @return true if this thread needs to free/recycle the task 1373 */ 1374 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1375 MutexLocker waiter(task->lock(), thread); 1376 int progress_wait_attempts = 0; 1377 int methods_compiled = jvmci->methods_compiled(); 1378 while (!task->is_complete() && !is_compilation_disabled_forever() && 1379 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1380 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1381 1382 bool progress; 1383 if (jvmci_compiler_thread != NULL) { 1384 // If the JVMCI compiler thread is not blocked, we deem it to be making progress. 1385 progress = jvmci_compiler_thread->thread_state() != _thread_blocked; 1386 } else { 1387 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1388 // that all JVMCI compiler threads are blocked on. We use the counter for 1389 // successful JVMCI compilations to determine whether JVMCI compilation 1390 // is still making progress through the JVMCI compiler queue. 1391 progress = jvmci->methods_compiled() != methods_compiled; 1392 } 1393 1394 if (!progress) { 1395 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1396 if (PrintCompilation) { 1397 task->print(tty, "wait for blocking compilation timed out"); 1398 } 1399 break; 1400 } 1401 } else { 1402 progress_wait_attempts = 0; 1403 if (jvmci_compiler_thread == NULL) { 1404 methods_compiled = jvmci->methods_compiled(); 1405 } 1406 } 1407 } 1408 task->clear_waiter(); 1409 return task->is_complete(); 1410 } 1411 #endif 1412 1413 /** 1414 * Wait for the compilation task to complete. 1415 */ 1416 void CompileBroker::wait_for_completion(CompileTask* task) { 1417 if (CIPrintCompileQueue) { 1418 ttyLocker ttyl; 1419 tty->print_cr("BLOCKING FOR COMPILE"); 1420 } 1421 1422 assert(task->is_blocking(), "can only wait on blocking task"); 1423 1424 JavaThread* thread = JavaThread::current(); 1425 thread->set_blocked_on_compilation(true); 1426 1427 methodHandle method(thread, task->method()); 1428 bool free_task; 1429 #if INCLUDE_JVMCI 1430 AbstractCompiler* comp = compiler(task->comp_level()); 1431 if (comp->is_jvmci()) { 1432 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1433 } else 1434 #endif 1435 { 1436 MutexLocker waiter(task->lock(), thread); 1437 free_task = true; 1438 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1439 task->lock()->wait(); 1440 } 1441 } 1442 1443 thread->set_blocked_on_compilation(false); 1444 if (free_task) { 1445 if (is_compilation_disabled_forever()) { 1446 CompileTask::free(task); 1447 return; 1448 } 1449 1450 // It is harmless to check this status without the lock, because 1451 // completion is a stable property (until the task object is recycled). 1452 assert(task->is_complete(), "Compilation should have completed"); 1453 assert(task->code_handle() == NULL, "must be reset"); 1454 1455 // By convention, the waiter is responsible for recycling a 1456 // blocking CompileTask. Since there is only one waiter ever 1457 // waiting on a CompileTask, we know that no one else will 1458 // be using this CompileTask; we can free it. 1459 CompileTask::free(task); 1460 } 1461 } 1462 1463 /** 1464 * Initialize compiler thread(s) + compiler object(s). The postcondition 1465 * of this function is that the compiler runtimes are initialized and that 1466 * compiler threads can start compiling. 1467 */ 1468 bool CompileBroker::init_compiler_runtime() { 1469 CompilerThread* thread = CompilerThread::current(); 1470 AbstractCompiler* comp = thread->compiler(); 1471 // Final sanity check - the compiler object must exist 1472 guarantee(comp != NULL, "Compiler object must exist"); 1473 1474 int system_dictionary_modification_counter; 1475 { 1476 MutexLocker locker(Compile_lock, thread); 1477 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1478 } 1479 1480 { 1481 // Must switch to native to allocate ci_env 1482 ThreadToNativeFromVM ttn(thread); 1483 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1484 // Cache Jvmti state 1485 ci_env.cache_jvmti_state(); 1486 // Cache DTrace flags 1487 ci_env.cache_dtrace_flags(); 1488 1489 // Switch back to VM state to do compiler initialization 1490 ThreadInVMfromNative tv(thread); 1491 ResetNoHandleMark rnhm; 1492 1493 if (!comp->is_shark()) { 1494 // Perform per-thread and global initializations 1495 comp->initialize(); 1496 } 1497 } 1498 1499 if (comp->is_failed()) { 1500 disable_compilation_forever(); 1501 // If compiler initialization failed, no compiler thread that is specific to a 1502 // particular compiler runtime will ever start to compile methods. 1503 shutdown_compiler_runtime(comp, thread); 1504 return false; 1505 } 1506 1507 // C1 specific check 1508 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1509 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1510 return false; 1511 } 1512 1513 return true; 1514 } 1515 1516 /** 1517 * If C1 and/or C2 initialization failed, we shut down all compilation. 1518 * We do this to keep things simple. This can be changed if it ever turns 1519 * out to be a problem. 1520 */ 1521 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1522 // Free buffer blob, if allocated 1523 if (thread->get_buffer_blob() != NULL) { 1524 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1525 CodeCache::free(thread->get_buffer_blob()); 1526 } 1527 1528 if (comp->should_perform_shutdown()) { 1529 // There are two reasons for shutting down the compiler 1530 // 1) compiler runtime initialization failed 1531 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1532 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1533 1534 // Only one thread per compiler runtime object enters here 1535 // Set state to shut down 1536 comp->set_shut_down(); 1537 1538 // Delete all queued compilation tasks to make compiler threads exit faster. 1539 if (_c1_compile_queue != NULL) { 1540 _c1_compile_queue->free_all(); 1541 } 1542 1543 if (_c2_compile_queue != NULL) { 1544 _c2_compile_queue->free_all(); 1545 } 1546 1547 // Set flags so that we continue execution with using interpreter only. 1548 UseCompiler = false; 1549 UseInterpreter = true; 1550 1551 // We could delete compiler runtimes also. However, there are references to 1552 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1553 // fail. This can be done later if necessary. 1554 } 1555 } 1556 1557 // ------------------------------------------------------------------ 1558 // CompileBroker::compiler_thread_loop 1559 // 1560 // The main loop run by a CompilerThread. 1561 void CompileBroker::compiler_thread_loop() { 1562 CompilerThread* thread = CompilerThread::current(); 1563 CompileQueue* queue = thread->queue(); 1564 // For the thread that initializes the ciObjectFactory 1565 // this resource mark holds all the shared objects 1566 ResourceMark rm; 1567 1568 // First thread to get here will initialize the compiler interface 1569 1570 { 1571 ASSERT_IN_VM; 1572 MutexLocker only_one (CompileThread_lock, thread); 1573 if (!ciObjectFactory::is_initialized()) { 1574 ciObjectFactory::initialize(); 1575 } 1576 } 1577 1578 // Open a log. 1579 if (LogCompilation) { 1580 init_compiler_thread_log(); 1581 } 1582 CompileLog* log = thread->log(); 1583 if (log != NULL) { 1584 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1585 thread->name(), 1586 os::current_thread_id(), 1587 os::current_process_id()); 1588 log->stamp(); 1589 log->end_elem(); 1590 } 1591 1592 // If compiler thread/runtime initialization fails, exit the compiler thread 1593 if (!init_compiler_runtime()) { 1594 return; 1595 } 1596 1597 // Poll for new compilation tasks as long as the JVM runs. Compilation 1598 // should only be disabled if something went wrong while initializing the 1599 // compiler runtimes. This, in turn, should not happen. The only known case 1600 // when compiler runtime initialization fails is if there is not enough free 1601 // space in the code cache to generate the necessary stubs, etc. 1602 while (!is_compilation_disabled_forever()) { 1603 // We need this HandleMark to avoid leaking VM handles. 1604 HandleMark hm(thread); 1605 1606 CompileTask* task = queue->get(); 1607 if (task == NULL) { 1608 continue; 1609 } 1610 1611 // Give compiler threads an extra quanta. They tend to be bursty and 1612 // this helps the compiler to finish up the job. 1613 if (CompilerThreadHintNoPreempt) { 1614 os::hint_no_preempt(); 1615 } 1616 1617 // Assign the task to the current thread. Mark this compilation 1618 // thread as active for the profiler. 1619 CompileTaskWrapper ctw(task); 1620 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1621 task->set_code_handle(&result_handle); 1622 methodHandle method(thread, task->method()); 1623 1624 // Never compile a method if breakpoints are present in it 1625 if (method()->number_of_breakpoints() == 0) { 1626 // Compile the method. 1627 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1628 invoke_compiler_on_method(task); 1629 } else { 1630 // After compilation is disabled, remove remaining methods from queue 1631 method->clear_queued_for_compilation(); 1632 task->set_failure_reason("compilation is disabled"); 1633 } 1634 } 1635 } 1636 1637 // Shut down compiler runtime 1638 shutdown_compiler_runtime(thread->compiler(), thread); 1639 } 1640 1641 // ------------------------------------------------------------------ 1642 // CompileBroker::init_compiler_thread_log 1643 // 1644 // Set up state required by +LogCompilation. 1645 void CompileBroker::init_compiler_thread_log() { 1646 CompilerThread* thread = CompilerThread::current(); 1647 char file_name[4*K]; 1648 FILE* fp = NULL; 1649 intx thread_id = os::current_thread_id(); 1650 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1651 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1652 if (dir == NULL) { 1653 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1654 thread_id, os::current_process_id()); 1655 } else { 1656 jio_snprintf(file_name, sizeof(file_name), 1657 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1658 os::file_separator(), thread_id, os::current_process_id()); 1659 } 1660 1661 fp = fopen(file_name, "wt"); 1662 if (fp != NULL) { 1663 if (LogCompilation && Verbose) { 1664 tty->print_cr("Opening compilation log %s", file_name); 1665 } 1666 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1667 if (log == NULL) { 1668 fclose(fp); 1669 return; 1670 } 1671 thread->init_log(log); 1672 1673 if (xtty != NULL) { 1674 ttyLocker ttyl; 1675 // Record any per thread log files 1676 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1677 } 1678 return; 1679 } 1680 } 1681 warning("Cannot open log file: %s", file_name); 1682 } 1683 1684 void CompileBroker::log_metaspace_failure() { 1685 const char* message = "some methods may not be compiled because metaspace " 1686 "is out of memory"; 1687 if (_compilation_log != NULL) { 1688 _compilation_log->log_metaspace_failure(message); 1689 } 1690 if (PrintCompilation) { 1691 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1692 } 1693 } 1694 1695 1696 // ------------------------------------------------------------------ 1697 // CompileBroker::set_should_block 1698 // 1699 // Set _should_block. 1700 // Call this from the VM, with Threads_lock held and a safepoint requested. 1701 void CompileBroker::set_should_block() { 1702 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1703 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1704 #ifndef PRODUCT 1705 if (PrintCompilation && (Verbose || WizardMode)) 1706 tty->print_cr("notifying compiler thread pool to block"); 1707 #endif 1708 _should_block = true; 1709 } 1710 1711 // ------------------------------------------------------------------ 1712 // CompileBroker::maybe_block 1713 // 1714 // Call this from the compiler at convenient points, to poll for _should_block. 1715 void CompileBroker::maybe_block() { 1716 if (_should_block) { 1717 #ifndef PRODUCT 1718 if (PrintCompilation && (Verbose || WizardMode)) 1719 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1720 #endif 1721 ThreadInVMfromNative tivfn(JavaThread::current()); 1722 } 1723 } 1724 1725 // wrapper for CodeCache::print_summary() 1726 static void codecache_print(bool detailed) 1727 { 1728 ResourceMark rm; 1729 stringStream s; 1730 // Dump code cache into a buffer before locking the tty, 1731 { 1732 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1733 CodeCache::print_summary(&s, detailed); 1734 } 1735 ttyLocker ttyl; 1736 tty->print("%s", s.as_string()); 1737 } 1738 1739 // wrapper for CodeCache::print_summary() using outputStream 1740 static void codecache_print(outputStream* out, bool detailed) { 1741 ResourceMark rm; 1742 stringStream s; 1743 1744 // Dump code cache into a buffer 1745 { 1746 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1747 CodeCache::print_summary(&s, detailed); 1748 } 1749 1750 char* remaining_log = s.as_string(); 1751 while (*remaining_log != '\0') { 1752 char* eol = strchr(remaining_log, '\n'); 1753 if (eol == NULL) { 1754 out->print_cr("%s", remaining_log); 1755 remaining_log = remaining_log + strlen(remaining_log); 1756 } else { 1757 *eol = '\0'; 1758 out->print_cr("%s", remaining_log); 1759 remaining_log = eol + 1; 1760 } 1761 } 1762 } 1763 1764 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, EventCompilation& event, bool success, ciEnv* ci_env) { 1765 1766 if (success) { 1767 task->mark_success(); 1768 if (ci_env != NULL) { 1769 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 1770 } 1771 if (_compilation_log != NULL) { 1772 nmethod* code = task->code(); 1773 if (code != NULL) { 1774 _compilation_log->log_nmethod(thread, code); 1775 } 1776 } 1777 } 1778 1779 // simulate crash during compilation 1780 assert(task->compile_id() != CICrashAt, "just as planned"); 1781 if (event.should_commit()) { 1782 event.set_method(task->method()); 1783 event.set_compileId(task->compile_id()); 1784 event.set_compileLevel(task->comp_level()); 1785 event.set_succeded(task->is_success()); 1786 event.set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 1787 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1788 event.set_inlinedBytes(task->num_inlined_bytecodes()); 1789 event.commit(); 1790 } 1791 } 1792 1793 int DirectivesStack::_depth = 0; 1794 CompilerDirectives* DirectivesStack::_top = NULL; 1795 CompilerDirectives* DirectivesStack::_bottom = NULL; 1796 1797 // ------------------------------------------------------------------ 1798 // CompileBroker::invoke_compiler_on_method 1799 // 1800 // Compile a method. 1801 // 1802 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1803 task->print_ul(); 1804 if (PrintCompilation) { 1805 ResourceMark rm; 1806 task->print_tty(); 1807 } 1808 elapsedTimer time; 1809 1810 CompilerThread* thread = CompilerThread::current(); 1811 ResourceMark rm(thread); 1812 1813 if (LogEvents) { 1814 _compilation_log->log_compile(thread, task); 1815 } 1816 1817 // Common flags. 1818 uint compile_id = task->compile_id(); 1819 int osr_bci = task->osr_bci(); 1820 bool is_osr = (osr_bci != standard_entry_bci); 1821 bool should_log = (thread->log() != NULL); 1822 bool should_break = false; 1823 const int task_level = task->comp_level(); 1824 AbstractCompiler* comp = task->compiler(); 1825 1826 DirectiveSet* directive; 1827 { 1828 // create the handle inside it's own block so it can't 1829 // accidentally be referenced once the thread transitions to 1830 // native. The NoHandleMark before the transition should catch 1831 // any cases where this occurs in the future. 1832 methodHandle method(thread, task->method()); 1833 assert(!method->is_native(), "no longer compile natives"); 1834 1835 // Look up matching directives 1836 directive = DirectivesStack::getMatchingDirective(method, comp); 1837 1838 // Save information about this method in case of failure. 1839 set_last_compile(thread, method, is_osr, task_level); 1840 1841 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 1842 } 1843 1844 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 1845 if (should_log && !directive->LogOption) { 1846 should_log = false; 1847 } 1848 1849 // Allocate a new set of JNI handles. 1850 push_jni_handle_block(); 1851 Method* target_handle = task->method(); 1852 int compilable = ciEnv::MethodCompilable; 1853 const char* failure_reason = NULL; 1854 const char* retry_message = NULL; 1855 1856 int system_dictionary_modification_counter; 1857 { 1858 MutexLocker locker(Compile_lock, thread); 1859 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1860 } 1861 1862 #if INCLUDE_JVMCI 1863 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 1864 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 1865 1866 TraceTime t1("compilation", &time); 1867 EventCompilation event; 1868 1869 JVMCIEnv env(task, system_dictionary_modification_counter); 1870 methodHandle method(thread, target_handle); 1871 jvmci->compile_method(method, osr_bci, &env); 1872 1873 post_compile(thread, task, event, task->code() != NULL, NULL); 1874 1875 failure_reason = env.failure_reason(); 1876 if (!env.retryable()) { 1877 retry_message = "not retryable"; 1878 compilable = ciEnv::MethodCompilable_not_at_tier; 1879 } 1880 1881 } else 1882 #endif // INCLUDE_JVMCI 1883 { 1884 NoHandleMark nhm; 1885 ThreadToNativeFromVM ttn(thread); 1886 1887 ciEnv ci_env(task, system_dictionary_modification_counter); 1888 if (should_break) { 1889 ci_env.set_break_at_compile(true); 1890 } 1891 if (should_log) { 1892 ci_env.set_log(thread->log()); 1893 } 1894 assert(thread->env() == &ci_env, "set by ci_env"); 1895 // The thread-env() field is cleared in ~CompileTaskWrapper. 1896 1897 // Cache Jvmti state 1898 ci_env.cache_jvmti_state(); 1899 1900 // Cache DTrace flags 1901 ci_env.cache_dtrace_flags(); 1902 1903 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1904 1905 TraceTime t1("compilation", &time); 1906 EventCompilation event; 1907 1908 if (comp == NULL) { 1909 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 1910 } else { 1911 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 1912 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 1913 while (WhiteBox::compilation_locked) { 1914 locker.wait(Mutex::_no_safepoint_check_flag); 1915 } 1916 } 1917 comp->compile_method(&ci_env, target, osr_bci, directive); 1918 } 1919 1920 if (!ci_env.failing() && task->code() == NULL) { 1921 //assert(false, "compiler should always document failure"); 1922 // The compiler elected, without comment, not to register a result. 1923 // Do not attempt further compilations of this method. 1924 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1925 } 1926 1927 // Copy this bit to the enclosing block: 1928 compilable = ci_env.compilable(); 1929 1930 if (ci_env.failing()) { 1931 failure_reason = ci_env.failure_reason(); 1932 retry_message = ci_env.retry_message(); 1933 ci_env.report_failure(failure_reason); 1934 } 1935 1936 post_compile(thread, task, event, !ci_env.failing(), &ci_env); 1937 } 1938 // Remove the JNI handle block after the ciEnv destructor has run in 1939 // the previous block. 1940 pop_jni_handle_block(); 1941 1942 if (failure_reason != NULL) { 1943 task->set_failure_reason(failure_reason); 1944 if (_compilation_log != NULL) { 1945 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 1946 } 1947 if (PrintCompilation) { 1948 FormatBufferResource msg = retry_message != NULL ? 1949 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 1950 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 1951 task->print(tty, msg); 1952 } 1953 } 1954 1955 methodHandle method(thread, task->method()); 1956 1957 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 1958 1959 collect_statistics(thread, time, task); 1960 1961 nmethod* nm = task->code(); 1962 if (nm != NULL) { 1963 nm->maybe_print_nmethod(directive); 1964 } 1965 DirectivesStack::release(directive); 1966 1967 if (PrintCompilation && PrintCompilation2) { 1968 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 1969 tty->print("%4d ", compile_id); // print compilation number 1970 tty->print("%s ", (is_osr ? "%" : " ")); 1971 if (task->code() != NULL) { 1972 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 1973 } 1974 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 1975 } 1976 1977 Log(compilation, codecache) log; 1978 if (log.is_debug()) { 1979 LogStream ls(log.debug()); 1980 codecache_print(&ls, /* detailed= */ false); 1981 } 1982 if (PrintCodeCacheOnCompilation) { 1983 codecache_print(/* detailed= */ false); 1984 } 1985 // Disable compilation, if required. 1986 switch (compilable) { 1987 case ciEnv::MethodCompilable_never: 1988 if (is_osr) 1989 method->set_not_osr_compilable_quietly(); 1990 else 1991 method->set_not_compilable_quietly(); 1992 break; 1993 case ciEnv::MethodCompilable_not_at_tier: 1994 if (is_osr) 1995 method->set_not_osr_compilable_quietly(task_level); 1996 else 1997 method->set_not_compilable_quietly(task_level); 1998 break; 1999 } 2000 2001 // Note that the queued_for_compilation bits are cleared without 2002 // protection of a mutex. [They were set by the requester thread, 2003 // when adding the task to the compile queue -- at which time the 2004 // compile queue lock was held. Subsequently, we acquired the compile 2005 // queue lock to get this task off the compile queue; thus (to belabour 2006 // the point somewhat) our clearing of the bits must be occurring 2007 // only after the setting of the bits. See also 14012000 above. 2008 method->clear_queued_for_compilation(); 2009 2010 #ifdef ASSERT 2011 if (CollectedHeap::fired_fake_oom()) { 2012 // The current compile received a fake OOM during compilation so 2013 // go ahead and exit the VM since the test apparently succeeded 2014 tty->print_cr("*** Shutting down VM after successful fake OOM"); 2015 vm_exit(0); 2016 } 2017 #endif 2018 } 2019 2020 /** 2021 * The CodeCache is full. Print warning and disable compilation. 2022 * Schedule code cache cleaning so compilation can continue later. 2023 * This function needs to be called only from CodeCache::allocate(), 2024 * since we currently handle a full code cache uniformly. 2025 */ 2026 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2027 UseInterpreter = true; 2028 if (UseCompiler || AlwaysCompileLoopMethods ) { 2029 if (xtty != NULL) { 2030 ResourceMark rm; 2031 stringStream s; 2032 // Dump code cache state into a buffer before locking the tty, 2033 // because log_state() will use locks causing lock conflicts. 2034 CodeCache::log_state(&s); 2035 // Lock to prevent tearing 2036 ttyLocker ttyl; 2037 xtty->begin_elem("code_cache_full"); 2038 xtty->print("%s", s.as_string()); 2039 xtty->stamp(); 2040 xtty->end_elem(); 2041 } 2042 2043 #ifndef PRODUCT 2044 if (CompileTheWorld || ExitOnFullCodeCache) { 2045 codecache_print(/* detailed= */ true); 2046 before_exit(JavaThread::current()); 2047 exit_globals(); // will delete tty 2048 vm_direct_exit(CompileTheWorld ? 0 : 1); 2049 } 2050 #endif 2051 if (UseCodeCacheFlushing) { 2052 // Since code cache is full, immediately stop new compiles 2053 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2054 NMethodSweeper::log_sweep("disable_compiler"); 2055 } 2056 } else { 2057 disable_compilation_forever(); 2058 } 2059 2060 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2061 } 2062 } 2063 2064 // ------------------------------------------------------------------ 2065 // CompileBroker::set_last_compile 2066 // 2067 // Record this compilation for debugging purposes. 2068 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2069 ResourceMark rm; 2070 char* method_name = method->name()->as_C_string(); 2071 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2072 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2073 char current_method[CompilerCounters::cmname_buffer_length]; 2074 size_t maxLen = CompilerCounters::cmname_buffer_length; 2075 2076 if (UsePerfData) { 2077 const char* class_name = method->method_holder()->name()->as_C_string(); 2078 2079 size_t s1len = strlen(class_name); 2080 size_t s2len = strlen(method_name); 2081 2082 // check if we need to truncate the string 2083 if (s1len + s2len + 2 > maxLen) { 2084 2085 // the strategy is to lop off the leading characters of the 2086 // class name and the trailing characters of the method name. 2087 2088 if (s2len + 2 > maxLen) { 2089 // lop of the entire class name string, let snprintf handle 2090 // truncation of the method name. 2091 class_name += s1len; // null string 2092 } 2093 else { 2094 // lop off the extra characters from the front of the class name 2095 class_name += ((s1len + s2len + 2) - maxLen); 2096 } 2097 } 2098 2099 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2100 } 2101 2102 if (CICountOSR && is_osr) { 2103 _last_compile_type = osr_compile; 2104 } else { 2105 _last_compile_type = normal_compile; 2106 } 2107 _last_compile_level = comp_level; 2108 2109 if (UsePerfData) { 2110 CompilerCounters* counters = thread->counters(); 2111 counters->set_current_method(current_method); 2112 counters->set_compile_type((jlong)_last_compile_type); 2113 } 2114 } 2115 2116 2117 // ------------------------------------------------------------------ 2118 // CompileBroker::push_jni_handle_block 2119 // 2120 // Push on a new block of JNI handles. 2121 void CompileBroker::push_jni_handle_block() { 2122 JavaThread* thread = JavaThread::current(); 2123 2124 // Allocate a new block for JNI handles. 2125 // Inlined code from jni_PushLocalFrame() 2126 JNIHandleBlock* java_handles = thread->active_handles(); 2127 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2128 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2129 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2130 thread->set_active_handles(compile_handles); 2131 } 2132 2133 2134 // ------------------------------------------------------------------ 2135 // CompileBroker::pop_jni_handle_block 2136 // 2137 // Pop off the current block of JNI handles. 2138 void CompileBroker::pop_jni_handle_block() { 2139 JavaThread* thread = JavaThread::current(); 2140 2141 // Release our JNI handle block 2142 JNIHandleBlock* compile_handles = thread->active_handles(); 2143 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2144 thread->set_active_handles(java_handles); 2145 compile_handles->set_pop_frame_link(NULL); 2146 JNIHandleBlock::release_block(compile_handles, thread); // may block 2147 } 2148 2149 // ------------------------------------------------------------------ 2150 // CompileBroker::collect_statistics 2151 // 2152 // Collect statistics about the compilation. 2153 2154 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2155 bool success = task->is_success(); 2156 methodHandle method (thread, task->method()); 2157 uint compile_id = task->compile_id(); 2158 bool is_osr = (task->osr_bci() != standard_entry_bci); 2159 nmethod* code = task->code(); 2160 CompilerCounters* counters = thread->counters(); 2161 2162 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2163 MutexLocker locker(CompileStatistics_lock); 2164 2165 // _perf variables are production performance counters which are 2166 // updated regardless of the setting of the CITime and CITimeEach flags 2167 // 2168 2169 // account all time, including bailouts and failures in this counter; 2170 // C1 and C2 counters are counting both successful and unsuccessful compiles 2171 _t_total_compilation.add(time); 2172 2173 if (!success) { 2174 _total_bailout_count++; 2175 if (UsePerfData) { 2176 _perf_last_failed_method->set_value(counters->current_method()); 2177 _perf_last_failed_type->set_value(counters->compile_type()); 2178 _perf_total_bailout_count->inc(); 2179 } 2180 _t_bailedout_compilation.add(time); 2181 } else if (code == NULL) { 2182 if (UsePerfData) { 2183 _perf_last_invalidated_method->set_value(counters->current_method()); 2184 _perf_last_invalidated_type->set_value(counters->compile_type()); 2185 _perf_total_invalidated_count->inc(); 2186 } 2187 _total_invalidated_count++; 2188 _t_invalidated_compilation.add(time); 2189 } else { 2190 // Compilation succeeded 2191 2192 // update compilation ticks - used by the implementation of 2193 // java.lang.management.CompilationMBean 2194 _perf_total_compilation->inc(time.ticks()); 2195 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2196 2197 if (CITime) { 2198 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2199 if (is_osr) { 2200 _t_osr_compilation.add(time); 2201 _sum_osr_bytes_compiled += bytes_compiled; 2202 } else { 2203 _t_standard_compilation.add(time); 2204 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2205 } 2206 2207 #if INCLUDE_JVMCI 2208 AbstractCompiler* comp = compiler(task->comp_level()); 2209 if (comp) { 2210 CompilerStatistics* stats = comp->stats(); 2211 if (stats) { 2212 if (is_osr) { 2213 stats->_osr.update(time, bytes_compiled); 2214 } else { 2215 stats->_standard.update(time, bytes_compiled); 2216 } 2217 stats->_nmethods_size += code->total_size(); 2218 stats->_nmethods_code_size += code->insts_size(); 2219 } else { // if (!stats) 2220 assert(false, "Compiler statistics object must exist"); 2221 } 2222 } else { // if (!comp) 2223 assert(false, "Compiler object must exist"); 2224 } 2225 #endif // INCLUDE_JVMCI 2226 } 2227 2228 if (UsePerfData) { 2229 // save the name of the last method compiled 2230 _perf_last_method->set_value(counters->current_method()); 2231 _perf_last_compile_type->set_value(counters->compile_type()); 2232 _perf_last_compile_size->set_value(method->code_size() + 2233 task->num_inlined_bytecodes()); 2234 if (is_osr) { 2235 _perf_osr_compilation->inc(time.ticks()); 2236 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2237 } else { 2238 _perf_standard_compilation->inc(time.ticks()); 2239 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2240 } 2241 } 2242 2243 if (CITimeEach) { 2244 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2245 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2246 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2247 } 2248 2249 // Collect counts of successful compilations 2250 _sum_nmethod_size += code->total_size(); 2251 _sum_nmethod_code_size += code->insts_size(); 2252 _total_compile_count++; 2253 2254 if (UsePerfData) { 2255 _perf_sum_nmethod_size->inc( code->total_size()); 2256 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2257 _perf_total_compile_count->inc(); 2258 } 2259 2260 if (is_osr) { 2261 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2262 _total_osr_compile_count++; 2263 } else { 2264 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2265 _total_standard_compile_count++; 2266 } 2267 } 2268 // set the current method for the thread to null 2269 if (UsePerfData) counters->set_current_method(""); 2270 } 2271 2272 const char* CompileBroker::compiler_name(int comp_level) { 2273 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2274 if (comp == NULL) { 2275 return "no compiler"; 2276 } else { 2277 return (comp->name()); 2278 } 2279 } 2280 2281 #if INCLUDE_JVMCI 2282 void CompileBroker::print_times(AbstractCompiler* comp) { 2283 CompilerStatistics* stats = comp->stats(); 2284 if (stats) { 2285 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}", 2286 comp->name(), stats->bytes_per_second(), 2287 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2288 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2289 stats->_nmethods_size, stats->_nmethods_code_size); 2290 } else { // if (!stats) 2291 assert(false, "Compiler statistics object must exist"); 2292 } 2293 comp->print_timers(); 2294 } 2295 #endif // INCLUDE_JVMCI 2296 2297 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2298 #if INCLUDE_JVMCI 2299 elapsedTimer standard_compilation; 2300 elapsedTimer total_compilation; 2301 elapsedTimer osr_compilation; 2302 2303 int standard_bytes_compiled = 0; 2304 int osr_bytes_compiled = 0; 2305 2306 int standard_compile_count = 0; 2307 int osr_compile_count = 0; 2308 int total_compile_count = 0; 2309 2310 int nmethods_size = 0; 2311 int nmethods_code_size = 0; 2312 bool printedHeader = false; 2313 2314 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2315 AbstractCompiler* comp = _compilers[i]; 2316 if (comp != NULL) { 2317 if (per_compiler && aggregate && !printedHeader) { 2318 printedHeader = true; 2319 tty->cr(); 2320 tty->print_cr("Individual compiler times (for compiled methods only)"); 2321 tty->print_cr("------------------------------------------------"); 2322 tty->cr(); 2323 } 2324 CompilerStatistics* stats = comp->stats(); 2325 2326 if (stats) { 2327 standard_compilation.add(stats->_standard._time); 2328 osr_compilation.add(stats->_osr._time); 2329 2330 standard_bytes_compiled += stats->_standard._bytes; 2331 osr_bytes_compiled += stats->_osr._bytes; 2332 2333 standard_compile_count += stats->_standard._count; 2334 osr_compile_count += stats->_osr._count; 2335 2336 nmethods_size += stats->_nmethods_size; 2337 nmethods_code_size += stats->_nmethods_code_size; 2338 } else { // if (!stats) 2339 assert(false, "Compiler statistics object must exist"); 2340 } 2341 2342 if (per_compiler) { 2343 print_times(comp); 2344 } 2345 } 2346 } 2347 total_compile_count = osr_compile_count + standard_compile_count; 2348 total_compilation.add(osr_compilation); 2349 total_compilation.add(standard_compilation); 2350 2351 // In hosted mode, print the JVMCI compiler specific counters manually. 2352 if (!UseJVMCICompiler) { 2353 JVMCICompiler::print_compilation_timers(); 2354 } 2355 #else // INCLUDE_JVMCI 2356 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2357 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2358 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2359 2360 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2361 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2362 2363 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2364 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2365 int total_compile_count = CompileBroker::_total_compile_count; 2366 2367 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2368 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2369 #endif // INCLUDE_JVMCI 2370 2371 if (!aggregate) { 2372 return; 2373 } 2374 tty->cr(); 2375 tty->print_cr("Accumulated compiler times"); 2376 tty->print_cr("----------------------------------------------------------"); 2377 //0000000000111111111122222222223333333333444444444455555555556666666666 2378 //0123456789012345678901234567890123456789012345678901234567890123456789 2379 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2380 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2381 standard_compilation.seconds(), 2382 standard_compilation.seconds() / standard_compile_count); 2383 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2384 CompileBroker::_t_bailedout_compilation.seconds(), 2385 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2386 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2387 osr_compilation.seconds(), 2388 osr_compilation.seconds() / osr_compile_count); 2389 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2390 CompileBroker::_t_invalidated_compilation.seconds(), 2391 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2392 2393 AbstractCompiler *comp = compiler(CompLevel_simple); 2394 if (comp != NULL) { 2395 tty->cr(); 2396 comp->print_timers(); 2397 } 2398 comp = compiler(CompLevel_full_optimization); 2399 if (comp != NULL) { 2400 tty->cr(); 2401 comp->print_timers(); 2402 } 2403 tty->cr(); 2404 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2405 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2406 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2407 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2408 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2409 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2410 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2411 double tcs = total_compilation.seconds(); 2412 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2413 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2414 tty->cr(); 2415 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2416 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2417 } 2418 2419 // Debugging output for failure 2420 void CompileBroker::print_last_compile() { 2421 if (_last_compile_level != CompLevel_none && 2422 compiler(_last_compile_level) != NULL && 2423 _last_compile_type != no_compile) { 2424 if (_last_compile_type == osr_compile) { 2425 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2426 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2427 } else { 2428 tty->print_cr("Last parse: %d+++(%d) %s", 2429 _compilation_id, _last_compile_level, _last_method_compiled); 2430 } 2431 } 2432 }