1 /* 2 * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "jvm.h" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/codeCache.hpp" 31 #include "code/codeHeapState.hpp" 32 #include "code/dependencyContext.hpp" 33 #include "compiler/compileBroker.hpp" 34 #include "compiler/compileLog.hpp" 35 #include "compiler/compilerOracle.hpp" 36 #include "compiler/directivesParser.hpp" 37 #include "interpreter/linkResolver.hpp" 38 #include "jfr/jfrEvents.hpp" 39 #include "logging/log.hpp" 40 #include "logging/logStream.hpp" 41 #include "memory/allocation.inline.hpp" 42 #include "memory/resourceArea.hpp" 43 #include "oops/methodData.hpp" 44 #include "oops/method.inline.hpp" 45 #include "oops/oop.inline.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "prims/whitebox.hpp" 48 #include "runtime/arguments.hpp" 49 #include "runtime/atomic.hpp" 50 #include "runtime/compilationPolicy.hpp" 51 #include "runtime/init.hpp" 52 #include "runtime/interfaceSupport.inline.hpp" 53 #include "runtime/javaCalls.hpp" 54 #include "runtime/jniHandles.inline.hpp" 55 #include "runtime/os.hpp" 56 #include "runtime/safepointVerifiers.hpp" 57 #include "runtime/sharedRuntime.hpp" 58 #include "runtime/sweeper.hpp" 59 #include "runtime/timerTrace.hpp" 60 #include "runtime/vframe.inline.hpp" 61 #include "utilities/debug.hpp" 62 #include "utilities/dtrace.hpp" 63 #include "utilities/events.hpp" 64 #include "utilities/formatBuffer.hpp" 65 #include "utilities/macros.hpp" 66 #ifdef COMPILER1 67 #include "c1/c1_Compiler.hpp" 68 #endif 69 #if INCLUDE_JVMCI 70 #include "jvmci/jvmciCompiler.hpp" 71 #include "jvmci/jvmciRuntime.hpp" 72 #include "jvmci/jvmciJavaClasses.hpp" 73 #include "runtime/vframe.hpp" 74 #endif 75 #ifdef COMPILER2 76 #include "opto/c2compiler.hpp" 77 #endif 78 79 #ifdef DTRACE_ENABLED 80 81 // Only bother with this argument setup if dtrace is available 82 83 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 84 { \ 85 Symbol* klass_name = (method)->klass_name(); \ 86 Symbol* name = (method)->name(); \ 87 Symbol* signature = (method)->signature(); \ 88 HOTSPOT_METHOD_COMPILE_BEGIN( \ 89 (char *) comp_name, strlen(comp_name), \ 90 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 91 (char *) name->bytes(), name->utf8_length(), \ 92 (char *) signature->bytes(), signature->utf8_length()); \ 93 } 94 95 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 96 { \ 97 Symbol* klass_name = (method)->klass_name(); \ 98 Symbol* name = (method)->name(); \ 99 Symbol* signature = (method)->signature(); \ 100 HOTSPOT_METHOD_COMPILE_END( \ 101 (char *) comp_name, strlen(comp_name), \ 102 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 103 (char *) name->bytes(), name->utf8_length(), \ 104 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 105 } 106 107 #else // ndef DTRACE_ENABLED 108 109 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 110 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 111 112 #endif // ndef DTRACE_ENABLED 113 114 bool CompileBroker::_initialized = false; 115 volatile bool CompileBroker::_should_block = false; 116 volatile int CompileBroker::_print_compilation_warning = 0; 117 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 118 119 // The installed compiler(s) 120 AbstractCompiler* CompileBroker::_compilers[2]; 121 122 // The maximum numbers of compiler threads to be determined during startup. 123 int CompileBroker::_c1_count = 0; 124 int CompileBroker::_c2_count = 0; 125 126 // An array of compiler names as Java String objects 127 jobject* CompileBroker::_compiler1_objects = NULL; 128 jobject* CompileBroker::_compiler2_objects = NULL; 129 130 CompileLog** CompileBroker::_compiler1_logs = NULL; 131 CompileLog** CompileBroker::_compiler2_logs = NULL; 132 133 // These counters are used to assign an unique ID to each compilation. 134 volatile jint CompileBroker::_compilation_id = 0; 135 volatile jint CompileBroker::_osr_compilation_id = 0; 136 137 // Debugging information 138 int CompileBroker::_last_compile_type = no_compile; 139 int CompileBroker::_last_compile_level = CompLevel_none; 140 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 141 142 // Performance counters 143 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 144 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 145 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 146 147 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 148 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 149 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 150 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 152 153 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 154 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 155 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 156 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 157 158 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 159 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 160 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 161 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 162 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 163 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 164 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 165 166 // Timers and counters for generating statistics 167 elapsedTimer CompileBroker::_t_total_compilation; 168 elapsedTimer CompileBroker::_t_osr_compilation; 169 elapsedTimer CompileBroker::_t_standard_compilation; 170 elapsedTimer CompileBroker::_t_invalidated_compilation; 171 elapsedTimer CompileBroker::_t_bailedout_compilation; 172 173 int CompileBroker::_total_bailout_count = 0; 174 int CompileBroker::_total_invalidated_count = 0; 175 int CompileBroker::_total_compile_count = 0; 176 int CompileBroker::_total_osr_compile_count = 0; 177 int CompileBroker::_total_standard_compile_count = 0; 178 int CompileBroker::_total_compiler_stopped_count = 0; 179 int CompileBroker::_total_compiler_restarted_count = 0; 180 181 int CompileBroker::_sum_osr_bytes_compiled = 0; 182 int CompileBroker::_sum_standard_bytes_compiled = 0; 183 int CompileBroker::_sum_nmethod_size = 0; 184 int CompileBroker::_sum_nmethod_code_size = 0; 185 186 long CompileBroker::_peak_compilation_time = 0; 187 188 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 189 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 190 191 192 193 class CompilationLog : public StringEventLog { 194 public: 195 CompilationLog() : StringEventLog("Compilation events") { 196 } 197 198 void log_compile(JavaThread* thread, CompileTask* task) { 199 StringLogMessage lm; 200 stringStream sstr(lm.buffer(), lm.size()); 201 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 202 task->print(&sstr, NULL, true, false); 203 log(thread, "%s", (const char*)lm); 204 } 205 206 void log_nmethod(JavaThread* thread, nmethod* nm) { 207 log(thread, "nmethod %d%s " INTPTR_FORMAT " code [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", 208 nm->compile_id(), nm->is_osr_method() ? "%" : "", 209 p2i(nm), p2i(nm->code_begin()), p2i(nm->code_end())); 210 } 211 212 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 213 StringLogMessage lm; 214 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 215 if (retry_message != NULL) { 216 lm.append(" (%s)", retry_message); 217 } 218 lm.print("\n"); 219 log(thread, "%s", (const char*)lm); 220 } 221 222 void log_metaspace_failure(const char* reason) { 223 ResourceMark rm; 224 StringLogMessage lm; 225 lm.print("%4d COMPILE PROFILING SKIPPED: %s", -1, reason); 226 lm.print("\n"); 227 log(JavaThread::current(), "%s", (const char*)lm); 228 } 229 }; 230 231 static CompilationLog* _compilation_log = NULL; 232 233 bool compileBroker_init() { 234 if (LogEvents) { 235 _compilation_log = new CompilationLog(); 236 } 237 238 // init directives stack, adding default directive 239 DirectivesStack::init(); 240 241 if (DirectivesParser::has_file()) { 242 return DirectivesParser::parse_from_flag(); 243 } else if (CompilerDirectivesPrint) { 244 // Print default directive even when no other was added 245 DirectivesStack::print(tty); 246 } 247 248 return true; 249 } 250 251 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 252 CompilerThread* thread = CompilerThread::current(); 253 thread->set_task(task); 254 #if INCLUDE_JVMCI 255 if (task->is_blocking() && CompileBroker::compiler(task->comp_level())->is_jvmci()) { 256 task->set_jvmci_compiler_thread(thread); 257 } 258 #endif 259 CompileLog* log = thread->log(); 260 if (log != NULL && !task->is_unloaded()) task->log_task_start(log); 261 } 262 263 CompileTaskWrapper::~CompileTaskWrapper() { 264 CompilerThread* thread = CompilerThread::current(); 265 CompileTask* task = thread->task(); 266 CompileLog* log = thread->log(); 267 if (log != NULL && !task->is_unloaded()) task->log_task_done(log); 268 thread->set_task(NULL); 269 task->set_code_handle(NULL); 270 thread->set_env(NULL); 271 if (task->is_blocking()) { 272 bool free_task = false; 273 { 274 MutexLocker notifier(task->lock(), thread); 275 task->mark_complete(); 276 #if INCLUDE_JVMCI 277 if (CompileBroker::compiler(task->comp_level())->is_jvmci()) { 278 if (!task->has_waiter()) { 279 // The waiting thread timed out and thus did not free the task. 280 free_task = true; 281 } 282 task->set_jvmci_compiler_thread(NULL); 283 } 284 #endif 285 if (!free_task) { 286 // Notify the waiting thread that the compilation has completed 287 // so that it can free the task. 288 task->lock()->notify_all(); 289 } 290 } 291 if (free_task) { 292 // The task can only be freed once the task lock is released. 293 CompileTask::free(task); 294 } 295 } else { 296 task->mark_complete(); 297 298 // By convention, the compiling thread is responsible for 299 // recycling a non-blocking CompileTask. 300 CompileTask::free(task); 301 } 302 } 303 304 /** 305 * Check if a CompilerThread can be removed and update count if requested. 306 */ 307 bool CompileBroker::can_remove(CompilerThread *ct, bool do_it) { 308 assert(UseDynamicNumberOfCompilerThreads, "or shouldn't be here"); 309 if (!ReduceNumberOfCompilerThreads) return false; 310 311 AbstractCompiler *compiler = ct->compiler(); 312 int compiler_count = compiler->num_compiler_threads(); 313 bool c1 = compiler->is_c1(); 314 315 // Keep at least 1 compiler thread of each type. 316 if (compiler_count < 2) return false; 317 318 // Keep thread alive for at least some time. 319 if (ct->idle_time_millis() < (c1 ? 500 : 100)) return false; 320 321 #if INCLUDE_JVMCI 322 if (compiler->is_jvmci()) { 323 // Handles for JVMCI thread objects may get released concurrently. 324 if (do_it) { 325 assert(CompileThread_lock->owner() == ct, "must be holding lock"); 326 } else { 327 // Skip check if it's the last thread and let caller check again. 328 return true; 329 } 330 } 331 #endif 332 333 // We only allow the last compiler thread of each type to get removed. 334 jobject last_compiler = c1 ? compiler1_object(compiler_count - 1) 335 : compiler2_object(compiler_count - 1); 336 if (oopDesc::equals(ct->threadObj(), JNIHandles::resolve_non_null(last_compiler))) { 337 if (do_it) { 338 assert_locked_or_safepoint(CompileThread_lock); // Update must be consistent. 339 compiler->set_num_compiler_threads(compiler_count - 1); 340 #if INCLUDE_JVMCI 341 if (compiler->is_jvmci()) { 342 // Old j.l.Thread object can die when no longer referenced elsewhere. 343 JNIHandles::destroy_global(compiler2_object(compiler_count - 1)); 344 _compiler2_objects[compiler_count - 1] = NULL; 345 } 346 #endif 347 } 348 return true; 349 } 350 return false; 351 } 352 353 /** 354 * Add a CompileTask to a CompileQueue. 355 */ 356 void CompileQueue::add(CompileTask* task) { 357 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 358 359 task->set_next(NULL); 360 task->set_prev(NULL); 361 362 if (_last == NULL) { 363 // The compile queue is empty. 364 assert(_first == NULL, "queue is empty"); 365 _first = task; 366 _last = task; 367 } else { 368 // Append the task to the queue. 369 assert(_last->next() == NULL, "not last"); 370 _last->set_next(task); 371 task->set_prev(_last); 372 _last = task; 373 } 374 ++_size; 375 376 // Mark the method as being in the compile queue. 377 task->method()->set_queued_for_compilation(); 378 379 if (CIPrintCompileQueue) { 380 print_tty(); 381 } 382 383 if (LogCompilation && xtty != NULL) { 384 task->log_task_queued(); 385 } 386 387 // Notify CompilerThreads that a task is available. 388 MethodCompileQueue_lock->notify_all(); 389 } 390 391 /** 392 * Empties compilation queue by putting all compilation tasks onto 393 * a freelist. Furthermore, the method wakes up all threads that are 394 * waiting on a compilation task to finish. This can happen if background 395 * compilation is disabled. 396 */ 397 void CompileQueue::free_all() { 398 MutexLocker mu(MethodCompileQueue_lock); 399 CompileTask* next = _first; 400 401 // Iterate over all tasks in the compile queue 402 while (next != NULL) { 403 CompileTask* current = next; 404 next = current->next(); 405 { 406 // Wake up thread that blocks on the compile task. 407 MutexLocker ct_lock(current->lock()); 408 current->lock()->notify(); 409 } 410 // Put the task back on the freelist. 411 CompileTask::free(current); 412 } 413 _first = NULL; 414 415 // Wake up all threads that block on the queue. 416 MethodCompileQueue_lock->notify_all(); 417 } 418 419 /** 420 * Get the next CompileTask from a CompileQueue 421 */ 422 CompileTask* CompileQueue::get() { 423 // save methods from RedefineClasses across safepoint 424 // across MethodCompileQueue_lock below. 425 methodHandle save_method; 426 methodHandle save_hot_method; 427 428 MutexLocker locker(MethodCompileQueue_lock); 429 // If _first is NULL we have no more compile jobs. There are two reasons for 430 // having no compile jobs: First, we compiled everything we wanted. Second, 431 // we ran out of code cache so compilation has been disabled. In the latter 432 // case we perform code cache sweeps to free memory such that we can re-enable 433 // compilation. 434 while (_first == NULL) { 435 // Exit loop if compilation is disabled forever 436 if (CompileBroker::is_compilation_disabled_forever()) { 437 return NULL; 438 } 439 440 // If there are no compilation tasks and we can compile new jobs 441 // (i.e., there is enough free space in the code cache) there is 442 // no need to invoke the sweeper. As a result, the hotness of methods 443 // remains unchanged. This behavior is desired, since we want to keep 444 // the stable state, i.e., we do not want to evict methods from the 445 // code cache if it is unnecessary. 446 // We need a timed wait here, since compiler threads can exit if compilation 447 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 448 // is not critical and we do not want idle compiler threads to wake up too often. 449 MethodCompileQueue_lock->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 450 451 if (UseDynamicNumberOfCompilerThreads && _first == NULL) { 452 // Still nothing to compile. Give caller a chance to stop this thread. 453 if (CompileBroker::can_remove(CompilerThread::current(), false)) return NULL; 454 } 455 } 456 457 if (CompileBroker::is_compilation_disabled_forever()) { 458 return NULL; 459 } 460 461 CompileTask* task; 462 { 463 NoSafepointVerifier nsv; 464 task = CompilationPolicy::policy()->select_task(this); 465 if (task != NULL) { 466 task = task->select_for_compilation(); 467 } 468 } 469 470 if (task != NULL) { 471 // Save method pointers across unlock safepoint. The task is removed from 472 // the compilation queue, which is walked during RedefineClasses. 473 save_method = methodHandle(task->method()); 474 save_hot_method = methodHandle(task->hot_method()); 475 476 remove(task); 477 } 478 purge_stale_tasks(); // may temporarily release MCQ lock 479 return task; 480 } 481 482 // Clean & deallocate stale compile tasks. 483 // Temporarily releases MethodCompileQueue lock. 484 void CompileQueue::purge_stale_tasks() { 485 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 486 if (_first_stale != NULL) { 487 // Stale tasks are purged when MCQ lock is released, 488 // but _first_stale updates are protected by MCQ lock. 489 // Once task processing starts and MCQ lock is released, 490 // other compiler threads can reuse _first_stale. 491 CompileTask* head = _first_stale; 492 _first_stale = NULL; 493 { 494 MutexUnlocker ul(MethodCompileQueue_lock); 495 for (CompileTask* task = head; task != NULL; ) { 496 CompileTask* next_task = task->next(); 497 CompileTaskWrapper ctw(task); // Frees the task 498 task->set_failure_reason("stale task"); 499 task = next_task; 500 } 501 } 502 } 503 } 504 505 void CompileQueue::remove(CompileTask* task) { 506 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 507 if (task->prev() != NULL) { 508 task->prev()->set_next(task->next()); 509 } else { 510 // max is the first element 511 assert(task == _first, "Sanity"); 512 _first = task->next(); 513 } 514 515 if (task->next() != NULL) { 516 task->next()->set_prev(task->prev()); 517 } else { 518 // max is the last element 519 assert(task == _last, "Sanity"); 520 _last = task->prev(); 521 } 522 --_size; 523 } 524 525 void CompileQueue::remove_and_mark_stale(CompileTask* task) { 526 assert(MethodCompileQueue_lock->owned_by_self(), "must own lock"); 527 remove(task); 528 529 // Enqueue the task for reclamation (should be done outside MCQ lock) 530 task->set_next(_first_stale); 531 task->set_prev(NULL); 532 _first_stale = task; 533 } 534 535 // methods in the compile queue need to be marked as used on the stack 536 // so that they don't get reclaimed by Redefine Classes 537 void CompileQueue::mark_on_stack() { 538 CompileTask* task = _first; 539 while (task != NULL) { 540 task->mark_on_stack(); 541 task = task->next(); 542 } 543 } 544 545 546 CompileQueue* CompileBroker::compile_queue(int comp_level) { 547 if (is_c2_compile(comp_level)) return _c2_compile_queue; 548 if (is_c1_compile(comp_level)) return _c1_compile_queue; 549 return NULL; 550 } 551 552 void CompileBroker::print_compile_queues(outputStream* st) { 553 st->print_cr("Current compiles: "); 554 555 char buf[2000]; 556 int buflen = sizeof(buf); 557 Threads::print_threads_compiling(st, buf, buflen, /* short_form = */ true); 558 559 st->cr(); 560 if (_c1_compile_queue != NULL) { 561 _c1_compile_queue->print(st); 562 } 563 if (_c2_compile_queue != NULL) { 564 _c2_compile_queue->print(st); 565 } 566 } 567 568 void CompileQueue::print(outputStream* st) { 569 assert_locked_or_safepoint(MethodCompileQueue_lock); 570 st->print_cr("%s:", name()); 571 CompileTask* task = _first; 572 if (task == NULL) { 573 st->print_cr("Empty"); 574 } else { 575 while (task != NULL) { 576 task->print(st, NULL, true, true); 577 task = task->next(); 578 } 579 } 580 st->cr(); 581 } 582 583 void CompileQueue::print_tty() { 584 ResourceMark rm; 585 stringStream ss; 586 // Dump the compile queue into a buffer before locking the tty 587 print(&ss); 588 { 589 ttyLocker ttyl; 590 tty->print("%s", ss.as_string()); 591 } 592 } 593 594 CompilerCounters::CompilerCounters() { 595 _current_method[0] = '\0'; 596 _compile_type = CompileBroker::no_compile; 597 } 598 599 // ------------------------------------------------------------------ 600 // CompileBroker::compilation_init 601 // 602 // Initialize the Compilation object 603 void CompileBroker::compilation_init_phase1(TRAPS) { 604 _last_method_compiled[0] = '\0'; 605 606 // No need to initialize compilation system if we do not use it. 607 if (!UseCompiler) { 608 return; 609 } 610 // Set the interface to the current compiler(s). 611 _c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 612 _c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 613 614 #if INCLUDE_JVMCI 615 if (EnableJVMCI) { 616 // This is creating a JVMCICompiler singleton. 617 JVMCICompiler* jvmci = new JVMCICompiler(); 618 619 if (UseJVMCICompiler) { 620 _compilers[1] = jvmci; 621 if (FLAG_IS_DEFAULT(JVMCIThreads)) { 622 if (BootstrapJVMCI) { 623 // JVMCI will bootstrap so give it more threads 624 _c2_count = MIN2(32, os::active_processor_count()); 625 } 626 } else { 627 _c2_count = JVMCIThreads; 628 } 629 if (FLAG_IS_DEFAULT(JVMCIHostThreads)) { 630 } else { 631 _c1_count = JVMCIHostThreads; 632 } 633 } 634 } 635 #endif // INCLUDE_JVMCI 636 637 #ifdef COMPILER1 638 if (_c1_count > 0) { 639 _compilers[0] = new Compiler(); 640 } 641 #endif // COMPILER1 642 643 #ifdef COMPILER2 644 if (true JVMCI_ONLY( && !UseJVMCICompiler)) { 645 if (_c2_count > 0) { 646 _compilers[1] = new C2Compiler(); 647 } 648 } 649 #endif // COMPILER2 650 651 // Start the compiler thread(s) and the sweeper thread 652 init_compiler_sweeper_threads(); 653 // totalTime performance counter is always created as it is required 654 // by the implementation of java.lang.management.CompilationMBean. 655 { 656 EXCEPTION_MARK; 657 _perf_total_compilation = 658 PerfDataManager::create_counter(JAVA_CI, "totalTime", 659 PerfData::U_Ticks, CHECK); 660 } 661 662 if (UsePerfData) { 663 664 EXCEPTION_MARK; 665 666 // create the jvmstat performance counters 667 _perf_osr_compilation = 668 PerfDataManager::create_counter(SUN_CI, "osrTime", 669 PerfData::U_Ticks, CHECK); 670 671 _perf_standard_compilation = 672 PerfDataManager::create_counter(SUN_CI, "standardTime", 673 PerfData::U_Ticks, CHECK); 674 675 _perf_total_bailout_count = 676 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 677 PerfData::U_Events, CHECK); 678 679 _perf_total_invalidated_count = 680 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 681 PerfData::U_Events, CHECK); 682 683 _perf_total_compile_count = 684 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 685 PerfData::U_Events, CHECK); 686 _perf_total_osr_compile_count = 687 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 688 PerfData::U_Events, CHECK); 689 690 _perf_total_standard_compile_count = 691 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 692 PerfData::U_Events, CHECK); 693 694 _perf_sum_osr_bytes_compiled = 695 PerfDataManager::create_counter(SUN_CI, "osrBytes", 696 PerfData::U_Bytes, CHECK); 697 698 _perf_sum_standard_bytes_compiled = 699 PerfDataManager::create_counter(SUN_CI, "standardBytes", 700 PerfData::U_Bytes, CHECK); 701 702 _perf_sum_nmethod_size = 703 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 704 PerfData::U_Bytes, CHECK); 705 706 _perf_sum_nmethod_code_size = 707 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 708 PerfData::U_Bytes, CHECK); 709 710 _perf_last_method = 711 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 712 CompilerCounters::cmname_buffer_length, 713 "", CHECK); 714 715 _perf_last_failed_method = 716 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 717 CompilerCounters::cmname_buffer_length, 718 "", CHECK); 719 720 _perf_last_invalidated_method = 721 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 722 CompilerCounters::cmname_buffer_length, 723 "", CHECK); 724 725 _perf_last_compile_type = 726 PerfDataManager::create_variable(SUN_CI, "lastType", 727 PerfData::U_None, 728 (jlong)CompileBroker::no_compile, 729 CHECK); 730 731 _perf_last_compile_size = 732 PerfDataManager::create_variable(SUN_CI, "lastSize", 733 PerfData::U_Bytes, 734 (jlong)CompileBroker::no_compile, 735 CHECK); 736 737 738 _perf_last_failed_type = 739 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 740 PerfData::U_None, 741 (jlong)CompileBroker::no_compile, 742 CHECK); 743 744 _perf_last_invalidated_type = 745 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 746 PerfData::U_None, 747 (jlong)CompileBroker::no_compile, 748 CHECK); 749 } 750 } 751 752 // Completes compiler initialization. Compilation requests submitted 753 // prior to this will be silently ignored. 754 void CompileBroker::compilation_init_phase2() { 755 _initialized = true; 756 } 757 758 Handle CompileBroker::create_thread_oop(const char* name, TRAPS) { 759 Handle string = java_lang_String::create_from_str(name, CHECK_NH); 760 Handle thread_group(THREAD, Universe::system_thread_group()); 761 return JavaCalls::construct_new_instance( 762 SystemDictionary::Thread_klass(), 763 vmSymbols::threadgroup_string_void_signature(), 764 thread_group, 765 string, 766 CHECK_NH); 767 } 768 769 770 JavaThread* CompileBroker::make_thread(jobject thread_handle, CompileQueue* queue, AbstractCompiler* comp, TRAPS) { 771 JavaThread* thread = NULL; 772 { 773 MutexLocker mu(Threads_lock, THREAD); 774 if (comp != NULL) { 775 if (!InjectCompilerCreationFailure || comp->num_compiler_threads() == 0) { 776 CompilerCounters* counters = new CompilerCounters(); 777 thread = new CompilerThread(queue, counters); 778 } 779 } else { 780 thread = new CodeCacheSweeperThread(); 781 } 782 // At this point the new CompilerThread data-races with this startup 783 // thread (which I believe is the primoridal thread and NOT the VM 784 // thread). This means Java bytecodes being executed at startup can 785 // queue compile jobs which will run at whatever default priority the 786 // newly created CompilerThread runs at. 787 788 789 // At this point it may be possible that no osthread was created for the 790 // JavaThread due to lack of memory. We would have to throw an exception 791 // in that case. However, since this must work and we do not allow 792 // exceptions anyway, check and abort if this fails. But first release the 793 // lock. 794 795 if (thread != NULL && thread->osthread() != NULL) { 796 797 java_lang_Thread::set_thread(JNIHandles::resolve_non_null(thread_handle), thread); 798 799 // Note that this only sets the JavaThread _priority field, which by 800 // definition is limited to Java priorities and not OS priorities. 801 // The os-priority is set in the CompilerThread startup code itself 802 803 java_lang_Thread::set_priority(JNIHandles::resolve_non_null(thread_handle), NearMaxPriority); 804 805 // Note that we cannot call os::set_priority because it expects Java 806 // priorities and we are *explicitly* using OS priorities so that it's 807 // possible to set the compiler thread priority higher than any Java 808 // thread. 809 810 int native_prio = CompilerThreadPriority; 811 if (native_prio == -1) { 812 if (UseCriticalCompilerThreadPriority) { 813 native_prio = os::java_to_os_priority[CriticalPriority]; 814 } else { 815 native_prio = os::java_to_os_priority[NearMaxPriority]; 816 } 817 } 818 os::set_native_priority(thread, native_prio); 819 820 java_lang_Thread::set_daemon(JNIHandles::resolve_non_null(thread_handle)); 821 822 thread->set_threadObj(JNIHandles::resolve_non_null(thread_handle)); 823 if (comp != NULL) { 824 thread->as_CompilerThread()->set_compiler(comp); 825 } 826 Threads::add(thread); 827 Thread::start(thread); 828 } 829 } 830 831 // First release lock before aborting VM. 832 if (thread == NULL || thread->osthread() == NULL) { 833 if (UseDynamicNumberOfCompilerThreads && comp != NULL && comp->num_compiler_threads() > 0) { 834 if (thread != NULL) { 835 thread->smr_delete(); 836 } 837 return NULL; 838 } 839 vm_exit_during_initialization("java.lang.OutOfMemoryError", 840 os::native_thread_creation_failed_msg()); 841 } 842 843 // Let go of Threads_lock before yielding 844 os::naked_yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 845 846 return thread; 847 } 848 849 850 void CompileBroker::init_compiler_sweeper_threads() { 851 EXCEPTION_MARK; 852 #if !defined(ZERO) 853 assert(_c2_count > 0 || _c1_count > 0, "No compilers?"); 854 #endif // !ZERO 855 // Initialize the compilation queue 856 if (_c2_count > 0) { 857 const char* name = JVMCI_ONLY(UseJVMCICompiler ? "JVMCI compile queue" :) "C2 compile queue"; 858 _c2_compile_queue = new CompileQueue(name); 859 _compiler2_objects = NEW_C_HEAP_ARRAY(jobject, _c2_count, mtCompiler); 860 _compiler2_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c2_count, mtCompiler); 861 } 862 if (_c1_count > 0) { 863 _c1_compile_queue = new CompileQueue("C1 compile queue"); 864 _compiler1_objects = NEW_C_HEAP_ARRAY(jobject, _c1_count, mtCompiler); 865 _compiler1_logs = NEW_C_HEAP_ARRAY(CompileLog*, _c1_count, mtCompiler); 866 } 867 868 char name_buffer[256]; 869 870 for (int i = 0; i < _c2_count; i++) { 871 jobject thread_handle = NULL; 872 // Create all j.l.Thread objects for C1 and C2 threads here, but only one 873 // for JVMCI compiler which can create further ones on demand. 874 JVMCI_ONLY(if (!UseJVMCICompiler || !UseDynamicNumberOfCompilerThreads || i == 0) {) 875 // Create a name for our thread. 876 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 877 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 878 thread_handle = JNIHandles::make_global(thread_oop); 879 JVMCI_ONLY(}) 880 _compiler2_objects[i] = thread_handle; 881 _compiler2_logs[i] = NULL; 882 883 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 884 JavaThread *ct = make_thread(thread_handle, _c2_compile_queue, _compilers[1], CHECK); 885 assert(ct != NULL, "should have been handled for initial thread"); 886 _compilers[1]->set_num_compiler_threads(i + 1); 887 if (TraceCompilerThreads) { 888 ResourceMark rm; 889 MutexLocker mu(Threads_lock); 890 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 891 } 892 } 893 } 894 895 for (int i = 0; i < _c1_count; i++) { 896 // Create a name for our thread. 897 sprintf(name_buffer, "C1 CompilerThread%d", i); 898 Handle thread_oop = create_thread_oop(name_buffer, CHECK); 899 jobject thread_handle = JNIHandles::make_global(thread_oop); 900 _compiler1_objects[i] = thread_handle; 901 _compiler1_logs[i] = NULL; 902 903 if (!UseDynamicNumberOfCompilerThreads || i == 0) { 904 JavaThread *ct = make_thread(thread_handle, _c1_compile_queue, _compilers[0], CHECK); 905 assert(ct != NULL, "should have been handled for initial thread"); 906 _compilers[0]->set_num_compiler_threads(i + 1); 907 if (TraceCompilerThreads) { 908 ResourceMark rm; 909 MutexLocker mu(Threads_lock); 910 tty->print_cr("Added initial compiler thread %s", ct->get_thread_name()); 911 } 912 } 913 } 914 915 if (UsePerfData) { 916 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, _c1_count + _c2_count, CHECK); 917 } 918 919 if (MethodFlushing) { 920 // Initialize the sweeper thread 921 Handle thread_oop = create_thread_oop("Sweeper thread", CHECK); 922 jobject thread_handle = JNIHandles::make_local(THREAD, thread_oop()); 923 make_thread(thread_handle, NULL, NULL, CHECK); 924 } 925 } 926 927 void CompileBroker::possibly_add_compiler_threads() { 928 EXCEPTION_MARK; 929 930 julong available_memory = os::available_memory(); 931 // If SegmentedCodeCache is off, both values refer to the single heap (with type CodeBlobType::All). 932 size_t available_cc_np = CodeCache::unallocated_capacity(CodeBlobType::MethodNonProfiled), 933 available_cc_p = CodeCache::unallocated_capacity(CodeBlobType::MethodProfiled); 934 935 // Only do attempt to start additional threads if the lock is free. 936 if (!CompileThread_lock->try_lock()) return; 937 938 if (_c2_compile_queue != NULL) { 939 int old_c2_count = _compilers[1]->num_compiler_threads(); 940 int new_c2_count = MIN4(_c2_count, 941 _c2_compile_queue->size() / 2, 942 (int)(available_memory / (200*M)), 943 (int)(available_cc_np / (128*K))); 944 945 for (int i = old_c2_count; i < new_c2_count; i++) { 946 #if INCLUDE_JVMCI 947 if (UseJVMCICompiler) { 948 // Native compiler threads as used in C1/C2 can reuse the j.l.Thread 949 // objects as their existence is completely hidden from the rest of 950 // the VM (and those compiler threads can't call Java code to do the 951 // creation anyway). For JVMCI we have to create new j.l.Thread objects 952 // as they are visible and we can see unexpected thread lifecycle 953 // transitions if we bind them to new JavaThreads. 954 if (!THREAD->can_call_java()) break; 955 char name_buffer[256]; 956 sprintf(name_buffer, "%s CompilerThread%d", _compilers[1]->name(), i); 957 Handle thread_oop; 958 { 959 // We have to give up the lock temporarily for the Java calls. 960 MutexUnlocker mu(CompileThread_lock); 961 thread_oop = create_thread_oop(name_buffer, THREAD); 962 } 963 if (HAS_PENDING_EXCEPTION) { 964 if (TraceCompilerThreads) { 965 ResourceMark rm; 966 tty->print_cr("JVMCI compiler thread creation failed:"); 967 PENDING_EXCEPTION->print(); 968 } 969 CLEAR_PENDING_EXCEPTION; 970 break; 971 } 972 // Check if another thread has beaten us during the Java calls. 973 if (_compilers[1]->num_compiler_threads() != i) break; 974 jobject thread_handle = JNIHandles::make_global(thread_oop); 975 assert(compiler2_object(i) == NULL, "Old one must be released!"); 976 _compiler2_objects[i] = thread_handle; 977 } 978 #endif 979 JavaThread *ct = make_thread(compiler2_object(i), _c2_compile_queue, _compilers[1], CHECK); 980 if (ct == NULL) break; 981 _compilers[1]->set_num_compiler_threads(i + 1); 982 if (TraceCompilerThreads) { 983 ResourceMark rm; 984 MutexLocker mu(Threads_lock); 985 tty->print_cr("Added compiler thread %s (available memory: %dMB, available non-profiled code cache: %dMB)", 986 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_np/M)); 987 } 988 } 989 } 990 991 if (_c1_compile_queue != NULL) { 992 int old_c1_count = _compilers[0]->num_compiler_threads(); 993 int new_c1_count = MIN4(_c1_count, 994 _c1_compile_queue->size() / 4, 995 (int)(available_memory / (100*M)), 996 (int)(available_cc_p / (128*K))); 997 998 for (int i = old_c1_count; i < new_c1_count; i++) { 999 JavaThread *ct = make_thread(compiler1_object(i), _c1_compile_queue, _compilers[0], CHECK); 1000 if (ct == NULL) break; 1001 _compilers[0]->set_num_compiler_threads(i + 1); 1002 if (TraceCompilerThreads) { 1003 ResourceMark rm; 1004 MutexLocker mu(Threads_lock); 1005 tty->print_cr("Added compiler thread %s (available memory: %dMB, available profiled code cache: %dMB)", 1006 ct->get_thread_name(), (int)(available_memory/M), (int)(available_cc_p/M)); 1007 } 1008 } 1009 } 1010 1011 CompileThread_lock->unlock(); 1012 } 1013 1014 1015 /** 1016 * Set the methods on the stack as on_stack so that redefine classes doesn't 1017 * reclaim them. This method is executed at a safepoint. 1018 */ 1019 void CompileBroker::mark_on_stack() { 1020 assert(SafepointSynchronize::is_at_safepoint(), "sanity check"); 1021 // Since we are at a safepoint, we do not need a lock to access 1022 // the compile queues. 1023 if (_c2_compile_queue != NULL) { 1024 _c2_compile_queue->mark_on_stack(); 1025 } 1026 if (_c1_compile_queue != NULL) { 1027 _c1_compile_queue->mark_on_stack(); 1028 } 1029 } 1030 1031 // ------------------------------------------------------------------ 1032 // CompileBroker::compile_method 1033 // 1034 // Request compilation of a method. 1035 void CompileBroker::compile_method_base(const methodHandle& method, 1036 int osr_bci, 1037 int comp_level, 1038 const methodHandle& hot_method, 1039 int hot_count, 1040 CompileTask::CompileReason compile_reason, 1041 bool blocking, 1042 Thread* thread) { 1043 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 1044 assert(method->method_holder()->is_instance_klass(), 1045 "sanity check"); 1046 assert(!method->method_holder()->is_not_initialized(), 1047 "method holder must be initialized"); 1048 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 1049 1050 if (CIPrintRequests) { 1051 tty->print("request: "); 1052 method->print_short_name(tty); 1053 if (osr_bci != InvocationEntryBci) { 1054 tty->print(" osr_bci: %d", osr_bci); 1055 } 1056 tty->print(" level: %d comment: %s count: %d", comp_level, CompileTask::reason_name(compile_reason), hot_count); 1057 if (!hot_method.is_null()) { 1058 tty->print(" hot: "); 1059 if (hot_method() != method()) { 1060 hot_method->print_short_name(tty); 1061 } else { 1062 tty->print("yes"); 1063 } 1064 } 1065 tty->cr(); 1066 } 1067 1068 // A request has been made for compilation. Before we do any 1069 // real work, check to see if the method has been compiled 1070 // in the meantime with a definitive result. 1071 if (compilation_is_complete(method, osr_bci, comp_level)) { 1072 return; 1073 } 1074 1075 #ifndef PRODUCT 1076 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1077 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1078 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1079 return; 1080 } 1081 } 1082 #endif 1083 1084 // If this method is already in the compile queue, then 1085 // we do not block the current thread. 1086 if (compilation_is_in_queue(method)) { 1087 // We may want to decay our counter a bit here to prevent 1088 // multiple denied requests for compilation. This is an 1089 // open compilation policy issue. Note: The other possibility, 1090 // in the case that this is a blocking compile request, is to have 1091 // all subsequent blocking requesters wait for completion of 1092 // ongoing compiles. Note that in this case we'll need a protocol 1093 // for freeing the associated compile tasks. [Or we could have 1094 // a single static monitor on which all these waiters sleep.] 1095 return; 1096 } 1097 1098 if (TieredCompilation) { 1099 // Tiered policy requires MethodCounters to exist before adding a method to 1100 // the queue. Create if we don't have them yet. 1101 method->get_method_counters(thread); 1102 } 1103 1104 // Outputs from the following MutexLocker block: 1105 CompileTask* task = NULL; 1106 CompileQueue* queue = compile_queue(comp_level); 1107 1108 // Acquire our lock. 1109 { 1110 MutexLocker locker(MethodCompileQueue_lock, thread); 1111 1112 // Make sure the method has not slipped into the queues since 1113 // last we checked; note that those checks were "fast bail-outs". 1114 // Here we need to be more careful, see 14012000 below. 1115 if (compilation_is_in_queue(method)) { 1116 return; 1117 } 1118 1119 // We need to check again to see if the compilation has 1120 // completed. A previous compilation may have registered 1121 // some result. 1122 if (compilation_is_complete(method, osr_bci, comp_level)) { 1123 return; 1124 } 1125 1126 // We now know that this compilation is not pending, complete, 1127 // or prohibited. Assign a compile_id to this compilation 1128 // and check to see if it is in our [Start..Stop) range. 1129 int compile_id = assign_compile_id(method, osr_bci); 1130 if (compile_id == 0) { 1131 // The compilation falls outside the allowed range. 1132 return; 1133 } 1134 1135 #if INCLUDE_JVMCI 1136 if (UseJVMCICompiler) { 1137 if (blocking) { 1138 // Don't allow blocking compiles for requests triggered by JVMCI. 1139 if (thread->is_Compiler_thread()) { 1140 blocking = false; 1141 } 1142 1143 // Don't allow blocking compiles if inside a class initializer or while performing class loading 1144 vframeStream vfst((JavaThread*) thread); 1145 for (; !vfst.at_end(); vfst.next()) { 1146 if (vfst.method()->is_static_initializer() || 1147 (vfst.method()->method_holder()->is_subclass_of(SystemDictionary::ClassLoader_klass()) && 1148 vfst.method()->name() == vmSymbols::loadClass_name())) { 1149 blocking = false; 1150 break; 1151 } 1152 } 1153 1154 // Don't allow blocking compilation requests to JVMCI 1155 // if JVMCI itself is not yet initialized 1156 if (!JVMCIRuntime::is_HotSpotJVMCIRuntime_initialized() && compiler(comp_level)->is_jvmci()) { 1157 blocking = false; 1158 } 1159 1160 // Don't allow blocking compilation requests if we are in JVMCIRuntime::shutdown 1161 // to avoid deadlock between compiler thread(s) and threads run at shutdown 1162 // such as the DestroyJavaVM thread. 1163 if (JVMCIRuntime::shutdown_called()) { 1164 blocking = false; 1165 } 1166 } 1167 } 1168 #endif // INCLUDE_JVMCI 1169 1170 // We will enter the compilation in the queue. 1171 // 14012000: Note that this sets the queued_for_compile bits in 1172 // the target method. We can now reason that a method cannot be 1173 // queued for compilation more than once, as follows: 1174 // Before a thread queues a task for compilation, it first acquires 1175 // the compile queue lock, then checks if the method's queued bits 1176 // are set or it has already been compiled. Thus there can not be two 1177 // instances of a compilation task for the same method on the 1178 // compilation queue. Consider now the case where the compilation 1179 // thread has already removed a task for that method from the queue 1180 // and is in the midst of compiling it. In this case, the 1181 // queued_for_compile bits must be set in the method (and these 1182 // will be visible to the current thread, since the bits were set 1183 // under protection of the compile queue lock, which we hold now. 1184 // When the compilation completes, the compiler thread first sets 1185 // the compilation result and then clears the queued_for_compile 1186 // bits. Neither of these actions are protected by a barrier (or done 1187 // under the protection of a lock), so the only guarantee we have 1188 // (on machines with TSO (Total Store Order)) is that these values 1189 // will update in that order. As a result, the only combinations of 1190 // these bits that the current thread will see are, in temporal order: 1191 // <RESULT, QUEUE> : 1192 // <0, 1> : in compile queue, but not yet compiled 1193 // <1, 1> : compiled but queue bit not cleared 1194 // <1, 0> : compiled and queue bit cleared 1195 // Because we first check the queue bits then check the result bits, 1196 // we are assured that we cannot introduce a duplicate task. 1197 // Note that if we did the tests in the reverse order (i.e. check 1198 // result then check queued bit), we could get the result bit before 1199 // the compilation completed, and the queue bit after the compilation 1200 // completed, and end up introducing a "duplicate" (redundant) task. 1201 // In that case, the compiler thread should first check if a method 1202 // has already been compiled before trying to compile it. 1203 // NOTE: in the event that there are multiple compiler threads and 1204 // there is de-optimization/recompilation, things will get hairy, 1205 // and in that case it's best to protect both the testing (here) of 1206 // these bits, and their updating (here and elsewhere) under a 1207 // common lock. 1208 task = create_compile_task(queue, 1209 compile_id, method, 1210 osr_bci, comp_level, 1211 hot_method, hot_count, compile_reason, 1212 blocking); 1213 } 1214 1215 if (blocking) { 1216 wait_for_completion(task); 1217 } 1218 } 1219 1220 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1221 int comp_level, 1222 const methodHandle& hot_method, int hot_count, 1223 CompileTask::CompileReason compile_reason, 1224 Thread* THREAD) { 1225 // Do nothing if compilebroker is not initalized or compiles are submitted on level none 1226 if (!_initialized || comp_level == CompLevel_none) { 1227 return NULL; 1228 } 1229 1230 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1231 assert(comp != NULL, "Ensure we have a compiler"); 1232 1233 DirectiveSet* directive = DirectivesStack::getMatchingDirective(method, comp); 1234 nmethod* nm = CompileBroker::compile_method(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, directive, THREAD); 1235 DirectivesStack::release(directive); 1236 return nm; 1237 } 1238 1239 nmethod* CompileBroker::compile_method(const methodHandle& method, int osr_bci, 1240 int comp_level, 1241 const methodHandle& hot_method, int hot_count, 1242 CompileTask::CompileReason compile_reason, 1243 DirectiveSet* directive, 1244 Thread* THREAD) { 1245 1246 // make sure arguments make sense 1247 assert(method->method_holder()->is_instance_klass(), "not an instance method"); 1248 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1249 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1250 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1251 assert(!TieredCompilation || comp_level <= TieredStopAtLevel, "Invalid compilation level"); 1252 // allow any levels for WhiteBox 1253 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1254 // return quickly if possible 1255 1256 // lock, make sure that the compilation 1257 // isn't prohibited in a straightforward way. 1258 AbstractCompiler* comp = CompileBroker::compiler(comp_level); 1259 if (comp == NULL || !comp->can_compile_method(method) || 1260 compilation_is_prohibited(method, osr_bci, comp_level, directive->ExcludeOption)) { 1261 return NULL; 1262 } 1263 1264 #if INCLUDE_JVMCI 1265 if (comp->is_jvmci() && !JVMCIRuntime::can_initialize_JVMCI()) { 1266 return NULL; 1267 } 1268 #endif 1269 1270 if (osr_bci == InvocationEntryBci) { 1271 // standard compilation 1272 CompiledMethod* method_code = method->code(); 1273 if (method_code != NULL && method_code->is_nmethod()) { 1274 if (compilation_is_complete(method, osr_bci, comp_level)) { 1275 return (nmethod*) method_code; 1276 } 1277 } 1278 if (method->is_not_compilable(comp_level)) { 1279 return NULL; 1280 } 1281 } else { 1282 // osr compilation 1283 #ifndef TIERED 1284 // seems like an assert of dubious value 1285 assert(comp_level == CompLevel_highest_tier, 1286 "all OSR compiles are assumed to be at a single compilation level"); 1287 #endif // TIERED 1288 // We accept a higher level osr method 1289 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1290 if (nm != NULL) return nm; 1291 if (method->is_not_osr_compilable(comp_level)) return NULL; 1292 } 1293 1294 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1295 // some prerequisites that are compiler specific 1296 if (comp->is_c2()) { 1297 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1298 // Resolve all classes seen in the signature of the method 1299 // we are compiling. 1300 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1301 } 1302 1303 // If the method is native, do the lookup in the thread requesting 1304 // the compilation. Native lookups can load code, which is not 1305 // permitted during compilation. 1306 // 1307 // Note: A native method implies non-osr compilation which is 1308 // checked with an assertion at the entry of this method. 1309 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1310 bool in_base_library; 1311 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1312 if (HAS_PENDING_EXCEPTION) { 1313 // In case of an exception looking up the method, we just forget 1314 // about it. The interpreter will kick-in and throw the exception. 1315 method->set_not_compilable(); // implies is_not_osr_compilable() 1316 CLEAR_PENDING_EXCEPTION; 1317 return NULL; 1318 } 1319 assert(method->has_native_function(), "must have native code by now"); 1320 } 1321 1322 // RedefineClasses() has replaced this method; just return 1323 if (method->is_old()) { 1324 return NULL; 1325 } 1326 1327 // JVMTI -- post_compile_event requires jmethod_id() that may require 1328 // a lock the compiling thread can not acquire. Prefetch it here. 1329 if (JvmtiExport::should_post_compiled_method_load()) { 1330 method->jmethod_id(); 1331 } 1332 1333 // do the compilation 1334 if (method->is_native()) { 1335 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1336 // The following native methods: 1337 // 1338 // java.lang.Float.intBitsToFloat 1339 // java.lang.Float.floatToRawIntBits 1340 // java.lang.Double.longBitsToDouble 1341 // java.lang.Double.doubleToRawLongBits 1342 // 1343 // are called through the interpreter even if interpreter native stubs 1344 // are not preferred (i.e., calling through adapter handlers is preferred). 1345 // The reason is that on x86_32 signaling NaNs (sNaNs) are not preserved 1346 // if the version of the methods from the native libraries is called. 1347 // As the interpreter and the C2-intrinsified version of the methods preserves 1348 // sNaNs, that would result in an inconsistent way of handling of sNaNs. 1349 if ((UseSSE >= 1 && 1350 (method->intrinsic_id() == vmIntrinsics::_intBitsToFloat || 1351 method->intrinsic_id() == vmIntrinsics::_floatToRawIntBits)) || 1352 (UseSSE >= 2 && 1353 (method->intrinsic_id() == vmIntrinsics::_longBitsToDouble || 1354 method->intrinsic_id() == vmIntrinsics::_doubleToRawLongBits))) { 1355 return NULL; 1356 } 1357 1358 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1359 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1360 // 1361 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1362 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1363 AdapterHandlerLibrary::create_native_wrapper(method); 1364 } else { 1365 return NULL; 1366 } 1367 } else { 1368 // If the compiler is shut off due to code cache getting full 1369 // fail out now so blocking compiles dont hang the java thread 1370 if (!should_compile_new_jobs()) { 1371 CompilationPolicy::policy()->delay_compilation(method()); 1372 return NULL; 1373 } 1374 bool is_blocking = !directive->BackgroundCompilationOption || CompileTheWorld || ReplayCompiles; 1375 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, compile_reason, is_blocking, THREAD); 1376 } 1377 1378 // return requested nmethod 1379 // We accept a higher level osr method 1380 if (osr_bci == InvocationEntryBci) { 1381 CompiledMethod* code = method->code(); 1382 if (code == NULL) { 1383 return (nmethod*) code; 1384 } else { 1385 return code->as_nmethod_or_null(); 1386 } 1387 } 1388 return method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1389 } 1390 1391 1392 // ------------------------------------------------------------------ 1393 // CompileBroker::compilation_is_complete 1394 // 1395 // See if compilation of this method is already complete. 1396 bool CompileBroker::compilation_is_complete(const methodHandle& method, 1397 int osr_bci, 1398 int comp_level) { 1399 bool is_osr = (osr_bci != standard_entry_bci); 1400 if (is_osr) { 1401 if (method->is_not_osr_compilable(comp_level)) { 1402 return true; 1403 } else { 1404 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1405 return (result != NULL); 1406 } 1407 } else { 1408 if (method->is_not_compilable(comp_level)) { 1409 return true; 1410 } else { 1411 CompiledMethod* result = method->code(); 1412 if (result == NULL) return false; 1413 return comp_level == result->comp_level(); 1414 } 1415 } 1416 } 1417 1418 1419 /** 1420 * See if this compilation is already requested. 1421 * 1422 * Implementation note: there is only a single "is in queue" bit 1423 * for each method. This means that the check below is overly 1424 * conservative in the sense that an osr compilation in the queue 1425 * will block a normal compilation from entering the queue (and vice 1426 * versa). This can be remedied by a full queue search to disambiguate 1427 * cases. If it is deemed profitable, this may be done. 1428 */ 1429 bool CompileBroker::compilation_is_in_queue(const methodHandle& method) { 1430 return method->queued_for_compilation(); 1431 } 1432 1433 // ------------------------------------------------------------------ 1434 // CompileBroker::compilation_is_prohibited 1435 // 1436 // See if this compilation is not allowed. 1437 bool CompileBroker::compilation_is_prohibited(const methodHandle& method, int osr_bci, int comp_level, bool excluded) { 1438 bool is_native = method->is_native(); 1439 // Some compilers may not support the compilation of natives. 1440 AbstractCompiler *comp = compiler(comp_level); 1441 if (is_native && 1442 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1443 method->set_not_compilable_quietly(comp_level); 1444 return true; 1445 } 1446 1447 bool is_osr = (osr_bci != standard_entry_bci); 1448 // Some compilers may not support on stack replacement. 1449 if (is_osr && 1450 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1451 method->set_not_osr_compilable(comp_level); 1452 return true; 1453 } 1454 1455 // The method may be explicitly excluded by the user. 1456 double scale; 1457 if (excluded || (CompilerOracle::has_option_value(method, "CompileThresholdScaling", scale) && scale == 0)) { 1458 bool quietly = CompilerOracle::should_exclude_quietly(); 1459 if (PrintCompilation && !quietly) { 1460 // This does not happen quietly... 1461 ResourceMark rm; 1462 tty->print("### Excluding %s:%s", 1463 method->is_native() ? "generation of native wrapper" : "compile", 1464 (method->is_static() ? " static" : "")); 1465 method->print_short_name(tty); 1466 tty->cr(); 1467 } 1468 method->set_not_compilable(comp_level, !quietly, "excluded by CompileCommand"); 1469 } 1470 1471 return false; 1472 } 1473 1474 /** 1475 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1476 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1477 * The function also allows to generate separate compilation IDs for OSR compilations. 1478 */ 1479 int CompileBroker::assign_compile_id(const methodHandle& method, int osr_bci) { 1480 #ifdef ASSERT 1481 bool is_osr = (osr_bci != standard_entry_bci); 1482 int id; 1483 if (method->is_native()) { 1484 assert(!is_osr, "can't be osr"); 1485 // Adapters, native wrappers and method handle intrinsics 1486 // should be generated always. 1487 return Atomic::add(1, &_compilation_id); 1488 } else if (CICountOSR && is_osr) { 1489 id = Atomic::add(1, &_osr_compilation_id); 1490 if (CIStartOSR <= id && id < CIStopOSR) { 1491 return id; 1492 } 1493 } else { 1494 id = Atomic::add(1, &_compilation_id); 1495 if (CIStart <= id && id < CIStop) { 1496 return id; 1497 } 1498 } 1499 1500 // Method was not in the appropriate compilation range. 1501 method->set_not_compilable_quietly(); 1502 return 0; 1503 #else 1504 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1505 // only _compilation_id is incremented. 1506 return Atomic::add(1, &_compilation_id); 1507 #endif 1508 } 1509 1510 // ------------------------------------------------------------------ 1511 // CompileBroker::assign_compile_id_unlocked 1512 // 1513 // Public wrapper for assign_compile_id that acquires the needed locks 1514 uint CompileBroker::assign_compile_id_unlocked(Thread* thread, const methodHandle& method, int osr_bci) { 1515 MutexLocker locker(MethodCompileQueue_lock, thread); 1516 return assign_compile_id(method, osr_bci); 1517 } 1518 1519 // ------------------------------------------------------------------ 1520 // CompileBroker::preload_classes 1521 void CompileBroker::preload_classes(const methodHandle& method, TRAPS) { 1522 // Move this code over from c1_Compiler.cpp 1523 ShouldNotReachHere(); 1524 } 1525 1526 1527 // ------------------------------------------------------------------ 1528 // CompileBroker::create_compile_task 1529 // 1530 // Create a CompileTask object representing the current request for 1531 // compilation. Add this task to the queue. 1532 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1533 int compile_id, 1534 const methodHandle& method, 1535 int osr_bci, 1536 int comp_level, 1537 const methodHandle& hot_method, 1538 int hot_count, 1539 CompileTask::CompileReason compile_reason, 1540 bool blocking) { 1541 CompileTask* new_task = CompileTask::allocate(); 1542 new_task->initialize(compile_id, method, osr_bci, comp_level, 1543 hot_method, hot_count, compile_reason, 1544 blocking); 1545 queue->add(new_task); 1546 return new_task; 1547 } 1548 1549 #if INCLUDE_JVMCI 1550 // The number of milliseconds to wait before checking if 1551 // JVMCI compilation has made progress. 1552 static const long JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE = 1000; 1553 1554 // The number of JVMCI compilation progress checks that must fail 1555 // before unblocking a thread waiting for a blocking compilation. 1556 static const int JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS = 10; 1557 1558 /** 1559 * Waits for a JVMCI compiler to complete a given task. This thread 1560 * waits until either the task completes or it sees no JVMCI compilation 1561 * progress for N consecutive milliseconds where N is 1562 * JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE * 1563 * JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS. 1564 * 1565 * @return true if this thread needs to free/recycle the task 1566 */ 1567 bool CompileBroker::wait_for_jvmci_completion(JVMCICompiler* jvmci, CompileTask* task, JavaThread* thread) { 1568 MutexLocker waiter(task->lock(), thread); 1569 int progress_wait_attempts = 0; 1570 int methods_compiled = jvmci->methods_compiled(); 1571 while (!task->is_complete() && !is_compilation_disabled_forever() && 1572 task->lock()->wait(!Mutex::_no_safepoint_check_flag, JVMCI_COMPILATION_PROGRESS_WAIT_TIMESLICE)) { 1573 CompilerThread* jvmci_compiler_thread = task->jvmci_compiler_thread(); 1574 1575 bool progress; 1576 if (jvmci_compiler_thread != NULL) { 1577 // If the JVMCI compiler thread is not blocked, we deem it to be making progress. 1578 progress = jvmci_compiler_thread->thread_state() != _thread_blocked; 1579 } else { 1580 // Still waiting on JVMCI compiler queue. This thread may be holding a lock 1581 // that all JVMCI compiler threads are blocked on. We use the counter for 1582 // successful JVMCI compilations to determine whether JVMCI compilation 1583 // is still making progress through the JVMCI compiler queue. 1584 progress = jvmci->methods_compiled() != methods_compiled; 1585 } 1586 1587 if (!progress) { 1588 if (++progress_wait_attempts == JVMCI_COMPILATION_PROGRESS_WAIT_ATTEMPTS) { 1589 if (PrintCompilation) { 1590 task->print(tty, "wait for blocking compilation timed out"); 1591 } 1592 break; 1593 } 1594 } else { 1595 progress_wait_attempts = 0; 1596 if (jvmci_compiler_thread == NULL) { 1597 methods_compiled = jvmci->methods_compiled(); 1598 } 1599 } 1600 } 1601 task->clear_waiter(); 1602 return task->is_complete(); 1603 } 1604 #endif 1605 1606 /** 1607 * Wait for the compilation task to complete. 1608 */ 1609 void CompileBroker::wait_for_completion(CompileTask* task) { 1610 if (CIPrintCompileQueue) { 1611 ttyLocker ttyl; 1612 tty->print_cr("BLOCKING FOR COMPILE"); 1613 } 1614 1615 assert(task->is_blocking(), "can only wait on blocking task"); 1616 1617 JavaThread* thread = JavaThread::current(); 1618 thread->set_blocked_on_compilation(true); 1619 1620 methodHandle method(thread, task->method()); 1621 bool free_task; 1622 #if INCLUDE_JVMCI 1623 AbstractCompiler* comp = compiler(task->comp_level()); 1624 if (comp->is_jvmci() && !task->should_wait_for_compilation()) { 1625 // It may return before compilation is completed. 1626 free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread); 1627 } else 1628 #endif 1629 { 1630 MutexLocker waiter(task->lock(), thread); 1631 free_task = true; 1632 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1633 task->lock()->wait(); 1634 } 1635 } 1636 1637 thread->set_blocked_on_compilation(false); 1638 if (free_task) { 1639 if (is_compilation_disabled_forever()) { 1640 CompileTask::free(task); 1641 return; 1642 } 1643 1644 // It is harmless to check this status without the lock, because 1645 // completion is a stable property (until the task object is recycled). 1646 assert(task->is_complete(), "Compilation should have completed"); 1647 assert(task->code_handle() == NULL, "must be reset"); 1648 1649 // By convention, the waiter is responsible for recycling a 1650 // blocking CompileTask. Since there is only one waiter ever 1651 // waiting on a CompileTask, we know that no one else will 1652 // be using this CompileTask; we can free it. 1653 CompileTask::free(task); 1654 } 1655 } 1656 1657 /** 1658 * Initialize compiler thread(s) + compiler object(s). The postcondition 1659 * of this function is that the compiler runtimes are initialized and that 1660 * compiler threads can start compiling. 1661 */ 1662 bool CompileBroker::init_compiler_runtime() { 1663 CompilerThread* thread = CompilerThread::current(); 1664 AbstractCompiler* comp = thread->compiler(); 1665 // Final sanity check - the compiler object must exist 1666 guarantee(comp != NULL, "Compiler object must exist"); 1667 1668 int system_dictionary_modification_counter; 1669 { 1670 MutexLocker locker(Compile_lock, thread); 1671 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1672 } 1673 1674 { 1675 // Must switch to native to allocate ci_env 1676 ThreadToNativeFromVM ttn(thread); 1677 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1678 // Cache Jvmti state 1679 ci_env.cache_jvmti_state(); 1680 // Cache DTrace flags 1681 ci_env.cache_dtrace_flags(); 1682 1683 // Switch back to VM state to do compiler initialization 1684 ThreadInVMfromNative tv(thread); 1685 ResetNoHandleMark rnhm; 1686 1687 // Perform per-thread and global initializations 1688 comp->initialize(); 1689 } 1690 1691 if (comp->is_failed()) { 1692 disable_compilation_forever(); 1693 // If compiler initialization failed, no compiler thread that is specific to a 1694 // particular compiler runtime will ever start to compile methods. 1695 shutdown_compiler_runtime(comp, thread); 1696 return false; 1697 } 1698 1699 // C1 specific check 1700 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1701 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1702 return false; 1703 } 1704 1705 return true; 1706 } 1707 1708 /** 1709 * If C1 and/or C2 initialization failed, we shut down all compilation. 1710 * We do this to keep things simple. This can be changed if it ever turns 1711 * out to be a problem. 1712 */ 1713 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1714 // Free buffer blob, if allocated 1715 if (thread->get_buffer_blob() != NULL) { 1716 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1717 CodeCache::free(thread->get_buffer_blob()); 1718 } 1719 1720 if (comp->should_perform_shutdown()) { 1721 // There are two reasons for shutting down the compiler 1722 // 1) compiler runtime initialization failed 1723 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1724 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1725 1726 // Only one thread per compiler runtime object enters here 1727 // Set state to shut down 1728 comp->set_shut_down(); 1729 1730 // Delete all queued compilation tasks to make compiler threads exit faster. 1731 if (_c1_compile_queue != NULL) { 1732 _c1_compile_queue->free_all(); 1733 } 1734 1735 if (_c2_compile_queue != NULL) { 1736 _c2_compile_queue->free_all(); 1737 } 1738 1739 // Set flags so that we continue execution with using interpreter only. 1740 UseCompiler = false; 1741 UseInterpreter = true; 1742 1743 // We could delete compiler runtimes also. However, there are references to 1744 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1745 // fail. This can be done later if necessary. 1746 } 1747 } 1748 1749 /** 1750 * Helper function to create new or reuse old CompileLog. 1751 */ 1752 CompileLog* CompileBroker::get_log(CompilerThread* ct) { 1753 if (!LogCompilation) return NULL; 1754 1755 AbstractCompiler *compiler = ct->compiler(); 1756 bool c1 = compiler->is_c1(); 1757 jobject* compiler_objects = c1 ? _compiler1_objects : _compiler2_objects; 1758 assert(compiler_objects != NULL, "must be initialized at this point"); 1759 CompileLog** logs = c1 ? _compiler1_logs : _compiler2_logs; 1760 assert(logs != NULL, "must be initialized at this point"); 1761 int count = c1 ? _c1_count : _c2_count; 1762 1763 // Find Compiler number by its threadObj. 1764 oop compiler_obj = ct->threadObj(); 1765 int compiler_number = 0; 1766 bool found = false; 1767 for (; compiler_number < count; compiler_number++) { 1768 if (oopDesc::equals(JNIHandles::resolve_non_null(compiler_objects[compiler_number]), compiler_obj)) { 1769 found = true; 1770 break; 1771 } 1772 } 1773 assert(found, "Compiler must exist at this point"); 1774 1775 // Determine pointer for this thread's log. 1776 CompileLog** log_ptr = &logs[compiler_number]; 1777 1778 // Return old one if it exists. 1779 CompileLog* log = *log_ptr; 1780 if (log != NULL) { 1781 ct->init_log(log); 1782 return log; 1783 } 1784 1785 // Create a new one and remember it. 1786 init_compiler_thread_log(); 1787 log = ct->log(); 1788 *log_ptr = log; 1789 return log; 1790 } 1791 1792 // ------------------------------------------------------------------ 1793 // CompileBroker::compiler_thread_loop 1794 // 1795 // The main loop run by a CompilerThread. 1796 void CompileBroker::compiler_thread_loop() { 1797 CompilerThread* thread = CompilerThread::current(); 1798 CompileQueue* queue = thread->queue(); 1799 // For the thread that initializes the ciObjectFactory 1800 // this resource mark holds all the shared objects 1801 ResourceMark rm; 1802 1803 // First thread to get here will initialize the compiler interface 1804 1805 { 1806 ASSERT_IN_VM; 1807 MutexLocker only_one (CompileThread_lock, thread); 1808 if (!ciObjectFactory::is_initialized()) { 1809 ciObjectFactory::initialize(); 1810 } 1811 } 1812 1813 // Open a log. 1814 CompileLog* log = get_log(thread); 1815 if (log != NULL) { 1816 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1817 thread->name(), 1818 os::current_thread_id(), 1819 os::current_process_id()); 1820 log->stamp(); 1821 log->end_elem(); 1822 } 1823 1824 // If compiler thread/runtime initialization fails, exit the compiler thread 1825 if (!init_compiler_runtime()) { 1826 return; 1827 } 1828 1829 thread->start_idle_timer(); 1830 1831 // Poll for new compilation tasks as long as the JVM runs. Compilation 1832 // should only be disabled if something went wrong while initializing the 1833 // compiler runtimes. This, in turn, should not happen. The only known case 1834 // when compiler runtime initialization fails is if there is not enough free 1835 // space in the code cache to generate the necessary stubs, etc. 1836 while (!is_compilation_disabled_forever()) { 1837 // We need this HandleMark to avoid leaking VM handles. 1838 HandleMark hm(thread); 1839 1840 CompileTask* task = queue->get(); 1841 if (task == NULL) { 1842 if (UseDynamicNumberOfCompilerThreads) { 1843 // Access compiler_count under lock to enforce consistency. 1844 MutexLocker only_one(CompileThread_lock); 1845 if (can_remove(thread, true)) { 1846 if (TraceCompilerThreads) { 1847 tty->print_cr("Removing compiler thread %s after " JLONG_FORMAT " ms idle time", 1848 thread->name(), thread->idle_time_millis()); 1849 } 1850 // Free buffer blob, if allocated 1851 if (thread->get_buffer_blob() != NULL) { 1852 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1853 CodeCache::free(thread->get_buffer_blob()); 1854 } 1855 return; // Stop this thread. 1856 } 1857 } 1858 } else { 1859 1860 // Give compiler threads an extra quanta. They tend to be bursty and 1861 // this helps the compiler to finish up the job. 1862 if (CompilerThreadHintNoPreempt) { 1863 os::hint_no_preempt(); 1864 } 1865 1866 // Assign the task to the current thread. Mark this compilation 1867 // thread as active for the profiler. 1868 // CompileTaskWrapper also keeps the Method* from being deallocated if redefinition 1869 // occurs after fetching the compile task off the queue. 1870 CompileTaskWrapper ctw(task); 1871 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1872 task->set_code_handle(&result_handle); 1873 methodHandle method(thread, task->method()); 1874 1875 // Never compile a method if breakpoints are present in it 1876 if (method()->number_of_breakpoints() == 0) { 1877 // Compile the method. 1878 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1879 invoke_compiler_on_method(task); 1880 thread->start_idle_timer(); 1881 } else { 1882 // After compilation is disabled, remove remaining methods from queue 1883 method->clear_queued_for_compilation(); 1884 task->set_failure_reason("compilation is disabled"); 1885 } 1886 } 1887 1888 if (UseDynamicNumberOfCompilerThreads) { 1889 possibly_add_compiler_threads(); 1890 } 1891 } 1892 } 1893 1894 // Shut down compiler runtime 1895 shutdown_compiler_runtime(thread->compiler(), thread); 1896 } 1897 1898 // ------------------------------------------------------------------ 1899 // CompileBroker::init_compiler_thread_log 1900 // 1901 // Set up state required by +LogCompilation. 1902 void CompileBroker::init_compiler_thread_log() { 1903 CompilerThread* thread = CompilerThread::current(); 1904 char file_name[4*K]; 1905 FILE* fp = NULL; 1906 intx thread_id = os::current_thread_id(); 1907 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1908 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1909 if (dir == NULL) { 1910 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1911 thread_id, os::current_process_id()); 1912 } else { 1913 jio_snprintf(file_name, sizeof(file_name), 1914 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1915 os::file_separator(), thread_id, os::current_process_id()); 1916 } 1917 1918 fp = fopen(file_name, "wt"); 1919 if (fp != NULL) { 1920 if (LogCompilation && Verbose) { 1921 tty->print_cr("Opening compilation log %s", file_name); 1922 } 1923 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1924 if (log == NULL) { 1925 fclose(fp); 1926 return; 1927 } 1928 thread->init_log(log); 1929 1930 if (xtty != NULL) { 1931 ttyLocker ttyl; 1932 // Record any per thread log files 1933 xtty->elem("thread_logfile thread='" INTX_FORMAT "' filename='%s'", thread_id, file_name); 1934 } 1935 return; 1936 } 1937 } 1938 warning("Cannot open log file: %s", file_name); 1939 } 1940 1941 void CompileBroker::log_metaspace_failure() { 1942 const char* message = "some methods may not be compiled because metaspace " 1943 "is out of memory"; 1944 if (_compilation_log != NULL) { 1945 _compilation_log->log_metaspace_failure(message); 1946 } 1947 if (PrintCompilation) { 1948 tty->print_cr("COMPILE PROFILING SKIPPED: %s", message); 1949 } 1950 } 1951 1952 1953 // ------------------------------------------------------------------ 1954 // CompileBroker::set_should_block 1955 // 1956 // Set _should_block. 1957 // Call this from the VM, with Threads_lock held and a safepoint requested. 1958 void CompileBroker::set_should_block() { 1959 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1960 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1961 #ifndef PRODUCT 1962 if (PrintCompilation && (Verbose || WizardMode)) 1963 tty->print_cr("notifying compiler thread pool to block"); 1964 #endif 1965 _should_block = true; 1966 } 1967 1968 // ------------------------------------------------------------------ 1969 // CompileBroker::maybe_block 1970 // 1971 // Call this from the compiler at convenient points, to poll for _should_block. 1972 void CompileBroker::maybe_block() { 1973 if (_should_block) { 1974 #ifndef PRODUCT 1975 if (PrintCompilation && (Verbose || WizardMode)) 1976 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", p2i(Thread::current())); 1977 #endif 1978 ThreadInVMfromNative tivfn(JavaThread::current()); 1979 } 1980 } 1981 1982 // wrapper for CodeCache::print_summary() 1983 static void codecache_print(bool detailed) 1984 { 1985 ResourceMark rm; 1986 stringStream s; 1987 // Dump code cache into a buffer before locking the tty, 1988 { 1989 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1990 CodeCache::print_summary(&s, detailed); 1991 } 1992 ttyLocker ttyl; 1993 tty->print("%s", s.as_string()); 1994 } 1995 1996 // wrapper for CodeCache::print_summary() using outputStream 1997 static void codecache_print(outputStream* out, bool detailed) { 1998 ResourceMark rm; 1999 stringStream s; 2000 2001 // Dump code cache into a buffer 2002 { 2003 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 2004 CodeCache::print_summary(&s, detailed); 2005 } 2006 2007 char* remaining_log = s.as_string(); 2008 while (*remaining_log != '\0') { 2009 char* eol = strchr(remaining_log, '\n'); 2010 if (eol == NULL) { 2011 out->print_cr("%s", remaining_log); 2012 remaining_log = remaining_log + strlen(remaining_log); 2013 } else { 2014 *eol = '\0'; 2015 out->print_cr("%s", remaining_log); 2016 remaining_log = eol + 1; 2017 } 2018 } 2019 } 2020 2021 void CompileBroker::post_compile(CompilerThread* thread, CompileTask* task, bool success, ciEnv* ci_env, 2022 int compilable, const char* failure_reason) { 2023 if (success) { 2024 task->mark_success(); 2025 if (ci_env != NULL) { 2026 task->set_num_inlined_bytecodes(ci_env->num_inlined_bytecodes()); 2027 } 2028 if (_compilation_log != NULL) { 2029 nmethod* code = task->code(); 2030 if (code != NULL) { 2031 _compilation_log->log_nmethod(thread, code); 2032 } 2033 } 2034 } else if (AbortVMOnCompilationFailure) { 2035 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 2036 fatal("Not compilable at tier %d: %s", task->comp_level(), failure_reason); 2037 } 2038 if (compilable == ciEnv::MethodCompilable_never) { 2039 fatal("Never compilable: %s", failure_reason); 2040 } 2041 } 2042 // simulate crash during compilation 2043 assert(task->compile_id() != CICrashAt, "just as planned"); 2044 } 2045 2046 static void post_compilation_event(EventCompilation* event, CompileTask* task) { 2047 assert(event != NULL, "invariant"); 2048 assert(event->should_commit(), "invariant"); 2049 event->set_method(task->method()); 2050 event->set_compileId(task->compile_id()); 2051 event->set_compileLevel(task->comp_level()); 2052 event->set_succeded(task->is_success()); 2053 event->set_isOsr(task->osr_bci() != CompileBroker::standard_entry_bci); 2054 event->set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 2055 event->set_inlinedBytes(task->num_inlined_bytecodes()); 2056 event->commit(); 2057 } 2058 2059 int DirectivesStack::_depth = 0; 2060 CompilerDirectives* DirectivesStack::_top = NULL; 2061 CompilerDirectives* DirectivesStack::_bottom = NULL; 2062 2063 // ------------------------------------------------------------------ 2064 // CompileBroker::invoke_compiler_on_method 2065 // 2066 // Compile a method. 2067 // 2068 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 2069 task->print_ul(); 2070 if (PrintCompilation) { 2071 ResourceMark rm; 2072 task->print_tty(); 2073 } 2074 elapsedTimer time; 2075 2076 CompilerThread* thread = CompilerThread::current(); 2077 ResourceMark rm(thread); 2078 2079 if (LogEvents) { 2080 _compilation_log->log_compile(thread, task); 2081 } 2082 2083 // Common flags. 2084 uint compile_id = task->compile_id(); 2085 int osr_bci = task->osr_bci(); 2086 bool is_osr = (osr_bci != standard_entry_bci); 2087 bool should_log = (thread->log() != NULL); 2088 bool should_break = false; 2089 const int task_level = task->comp_level(); 2090 AbstractCompiler* comp = task->compiler(); 2091 2092 DirectiveSet* directive; 2093 { 2094 // create the handle inside it's own block so it can't 2095 // accidentally be referenced once the thread transitions to 2096 // native. The NoHandleMark before the transition should catch 2097 // any cases where this occurs in the future. 2098 methodHandle method(thread, task->method()); 2099 assert(!method->is_native(), "no longer compile natives"); 2100 2101 // Look up matching directives 2102 directive = DirectivesStack::getMatchingDirective(method, comp); 2103 2104 // Save information about this method in case of failure. 2105 set_last_compile(thread, method, is_osr, task_level); 2106 2107 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 2108 } 2109 2110 should_break = directive->BreakAtExecuteOption || task->check_break_at_flags(); 2111 if (should_log && !directive->LogOption) { 2112 should_log = false; 2113 } 2114 2115 // Allocate a new set of JNI handles. 2116 push_jni_handle_block(); 2117 Method* target_handle = task->method(); 2118 int compilable = ciEnv::MethodCompilable; 2119 const char* failure_reason = NULL; 2120 const char* retry_message = NULL; 2121 2122 int system_dictionary_modification_counter; 2123 { 2124 MutexLocker locker(Compile_lock, thread); 2125 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 2126 } 2127 2128 #if INCLUDE_JVMCI 2129 if (UseJVMCICompiler && comp != NULL && comp->is_jvmci()) { 2130 JVMCICompiler* jvmci = (JVMCICompiler*) comp; 2131 2132 TraceTime t1("compilation", &time); 2133 EventCompilation event; 2134 2135 // Skip redefined methods 2136 if (target_handle->is_old()) { 2137 failure_reason = "redefined method"; 2138 retry_message = "not retryable"; 2139 compilable = ciEnv::MethodCompilable_never; 2140 } else { 2141 JVMCIEnv env(task, system_dictionary_modification_counter); 2142 methodHandle method(thread, target_handle); 2143 jvmci->compile_method(method, osr_bci, &env); 2144 2145 failure_reason = env.failure_reason(); 2146 if (!env.retryable()) { 2147 retry_message = "not retryable"; 2148 compilable = ciEnv::MethodCompilable_not_at_tier; 2149 } 2150 } 2151 post_compile(thread, task, task->code() != NULL, NULL, compilable, failure_reason); 2152 if (event.should_commit()) { 2153 post_compilation_event(&event, task); 2154 } 2155 2156 } else 2157 #endif // INCLUDE_JVMCI 2158 { 2159 NoHandleMark nhm; 2160 ThreadToNativeFromVM ttn(thread); 2161 2162 ciEnv ci_env(task, system_dictionary_modification_counter); 2163 if (should_break) { 2164 ci_env.set_break_at_compile(true); 2165 } 2166 if (should_log) { 2167 ci_env.set_log(thread->log()); 2168 } 2169 assert(thread->env() == &ci_env, "set by ci_env"); 2170 // The thread-env() field is cleared in ~CompileTaskWrapper. 2171 2172 // Cache Jvmti state 2173 ci_env.cache_jvmti_state(); 2174 2175 // Cache DTrace flags 2176 ci_env.cache_dtrace_flags(); 2177 2178 ciMethod* target = ci_env.get_method_from_handle(target_handle); 2179 2180 TraceTime t1("compilation", &time); 2181 EventCompilation event; 2182 2183 if (comp == NULL) { 2184 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 2185 } else { 2186 if (WhiteBoxAPI && WhiteBox::compilation_locked) { 2187 MonitorLockerEx locker(Compilation_lock, Mutex::_no_safepoint_check_flag); 2188 while (WhiteBox::compilation_locked) { 2189 locker.wait(Mutex::_no_safepoint_check_flag); 2190 } 2191 } 2192 comp->compile_method(&ci_env, target, osr_bci, directive); 2193 } 2194 2195 if (!ci_env.failing() && task->code() == NULL) { 2196 //assert(false, "compiler should always document failure"); 2197 // The compiler elected, without comment, not to register a result. 2198 // Do not attempt further compilations of this method. 2199 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 2200 } 2201 2202 // Copy this bit to the enclosing block: 2203 compilable = ci_env.compilable(); 2204 2205 if (ci_env.failing()) { 2206 failure_reason = ci_env.failure_reason(); 2207 retry_message = ci_env.retry_message(); 2208 ci_env.report_failure(failure_reason); 2209 } 2210 2211 post_compile(thread, task, !ci_env.failing(), &ci_env, compilable, failure_reason); 2212 if (event.should_commit()) { 2213 post_compilation_event(&event, task); 2214 } 2215 } 2216 // Remove the JNI handle block after the ciEnv destructor has run in 2217 // the previous block. 2218 pop_jni_handle_block(); 2219 2220 if (failure_reason != NULL) { 2221 task->set_failure_reason(failure_reason); 2222 if (_compilation_log != NULL) { 2223 _compilation_log->log_failure(thread, task, failure_reason, retry_message); 2224 } 2225 if (PrintCompilation) { 2226 FormatBufferResource msg = retry_message != NULL ? 2227 FormatBufferResource("COMPILE SKIPPED: %s (%s)", failure_reason, retry_message) : 2228 FormatBufferResource("COMPILE SKIPPED: %s", failure_reason); 2229 task->print(tty, msg); 2230 } 2231 } 2232 2233 methodHandle method(thread, task->method()); 2234 2235 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 2236 2237 collect_statistics(thread, time, task); 2238 2239 nmethod* nm = task->code(); 2240 if (nm != NULL) { 2241 nm->maybe_print_nmethod(directive); 2242 } 2243 DirectivesStack::release(directive); 2244 2245 if (PrintCompilation && PrintCompilation2) { 2246 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 2247 tty->print("%4d ", compile_id); // print compilation number 2248 tty->print("%s ", (is_osr ? "%" : " ")); 2249 if (task->code() != NULL) { 2250 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 2251 } 2252 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 2253 } 2254 2255 Log(compilation, codecache) log; 2256 if (log.is_debug()) { 2257 LogStream ls(log.debug()); 2258 codecache_print(&ls, /* detailed= */ false); 2259 } 2260 if (PrintCodeCacheOnCompilation) { 2261 codecache_print(/* detailed= */ false); 2262 } 2263 // Disable compilation, if required. 2264 switch (compilable) { 2265 case ciEnv::MethodCompilable_never: 2266 if (is_osr) 2267 method->set_not_osr_compilable_quietly(); 2268 else 2269 method->set_not_compilable_quietly(); 2270 break; 2271 case ciEnv::MethodCompilable_not_at_tier: 2272 if (is_osr) 2273 method->set_not_osr_compilable_quietly(task_level); 2274 else 2275 method->set_not_compilable_quietly(task_level); 2276 break; 2277 } 2278 2279 // Note that the queued_for_compilation bits are cleared without 2280 // protection of a mutex. [They were set by the requester thread, 2281 // when adding the task to the compile queue -- at which time the 2282 // compile queue lock was held. Subsequently, we acquired the compile 2283 // queue lock to get this task off the compile queue; thus (to belabour 2284 // the point somewhat) our clearing of the bits must be occurring 2285 // only after the setting of the bits. See also 14012000 above. 2286 method->clear_queued_for_compilation(); 2287 2288 #ifdef ASSERT 2289 if (CollectedHeap::fired_fake_oom()) { 2290 // The current compile received a fake OOM during compilation so 2291 // go ahead and exit the VM since the test apparently succeeded 2292 tty->print_cr("*** Shutting down VM after successful fake OOM"); 2293 vm_exit(0); 2294 } 2295 #endif 2296 } 2297 2298 /** 2299 * The CodeCache is full. Print warning and disable compilation. 2300 * Schedule code cache cleaning so compilation can continue later. 2301 * This function needs to be called only from CodeCache::allocate(), 2302 * since we currently handle a full code cache uniformly. 2303 */ 2304 void CompileBroker::handle_full_code_cache(int code_blob_type) { 2305 UseInterpreter = true; 2306 if (UseCompiler || AlwaysCompileLoopMethods ) { 2307 if (xtty != NULL) { 2308 ResourceMark rm; 2309 stringStream s; 2310 // Dump code cache state into a buffer before locking the tty, 2311 // because log_state() will use locks causing lock conflicts. 2312 CodeCache::log_state(&s); 2313 // Lock to prevent tearing 2314 ttyLocker ttyl; 2315 xtty->begin_elem("code_cache_full"); 2316 xtty->print("%s", s.as_string()); 2317 xtty->stamp(); 2318 xtty->end_elem(); 2319 } 2320 2321 #ifndef PRODUCT 2322 if (CompileTheWorld || ExitOnFullCodeCache) { 2323 codecache_print(/* detailed= */ true); 2324 before_exit(JavaThread::current()); 2325 exit_globals(); // will delete tty 2326 vm_direct_exit(CompileTheWorld ? 0 : 1); 2327 } 2328 #endif 2329 if (UseCodeCacheFlushing) { 2330 // Since code cache is full, immediately stop new compiles 2331 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2332 NMethodSweeper::log_sweep("disable_compiler"); 2333 } 2334 } else { 2335 disable_compilation_forever(); 2336 } 2337 2338 CodeCache::report_codemem_full(code_blob_type, should_print_compiler_warning()); 2339 } 2340 } 2341 2342 // ------------------------------------------------------------------ 2343 // CompileBroker::set_last_compile 2344 // 2345 // Record this compilation for debugging purposes. 2346 void CompileBroker::set_last_compile(CompilerThread* thread, const methodHandle& method, bool is_osr, int comp_level) { 2347 ResourceMark rm; 2348 char* method_name = method->name()->as_C_string(); 2349 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2350 _last_method_compiled[CompileBroker::name_buffer_length - 1] = '\0'; // ensure null terminated 2351 char current_method[CompilerCounters::cmname_buffer_length]; 2352 size_t maxLen = CompilerCounters::cmname_buffer_length; 2353 2354 if (UsePerfData) { 2355 const char* class_name = method->method_holder()->name()->as_C_string(); 2356 2357 size_t s1len = strlen(class_name); 2358 size_t s2len = strlen(method_name); 2359 2360 // check if we need to truncate the string 2361 if (s1len + s2len + 2 > maxLen) { 2362 2363 // the strategy is to lop off the leading characters of the 2364 // class name and the trailing characters of the method name. 2365 2366 if (s2len + 2 > maxLen) { 2367 // lop of the entire class name string, let snprintf handle 2368 // truncation of the method name. 2369 class_name += s1len; // null string 2370 } 2371 else { 2372 // lop off the extra characters from the front of the class name 2373 class_name += ((s1len + s2len + 2) - maxLen); 2374 } 2375 } 2376 2377 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2378 } 2379 2380 if (CICountOSR && is_osr) { 2381 _last_compile_type = osr_compile; 2382 } else { 2383 _last_compile_type = normal_compile; 2384 } 2385 _last_compile_level = comp_level; 2386 2387 if (UsePerfData) { 2388 CompilerCounters* counters = thread->counters(); 2389 counters->set_current_method(current_method); 2390 counters->set_compile_type((jlong)_last_compile_type); 2391 } 2392 } 2393 2394 2395 // ------------------------------------------------------------------ 2396 // CompileBroker::push_jni_handle_block 2397 // 2398 // Push on a new block of JNI handles. 2399 void CompileBroker::push_jni_handle_block() { 2400 JavaThread* thread = JavaThread::current(); 2401 2402 // Allocate a new block for JNI handles. 2403 // Inlined code from jni_PushLocalFrame() 2404 JNIHandleBlock* java_handles = thread->active_handles(); 2405 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2406 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2407 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2408 thread->set_active_handles(compile_handles); 2409 } 2410 2411 2412 // ------------------------------------------------------------------ 2413 // CompileBroker::pop_jni_handle_block 2414 // 2415 // Pop off the current block of JNI handles. 2416 void CompileBroker::pop_jni_handle_block() { 2417 JavaThread* thread = JavaThread::current(); 2418 2419 // Release our JNI handle block 2420 JNIHandleBlock* compile_handles = thread->active_handles(); 2421 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2422 thread->set_active_handles(java_handles); 2423 compile_handles->set_pop_frame_link(NULL); 2424 JNIHandleBlock::release_block(compile_handles, thread); // may block 2425 } 2426 2427 // ------------------------------------------------------------------ 2428 // CompileBroker::collect_statistics 2429 // 2430 // Collect statistics about the compilation. 2431 2432 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2433 bool success = task->is_success(); 2434 methodHandle method (thread, task->method()); 2435 uint compile_id = task->compile_id(); 2436 bool is_osr = (task->osr_bci() != standard_entry_bci); 2437 nmethod* code = task->code(); 2438 CompilerCounters* counters = thread->counters(); 2439 2440 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2441 MutexLocker locker(CompileStatistics_lock); 2442 2443 // _perf variables are production performance counters which are 2444 // updated regardless of the setting of the CITime and CITimeEach flags 2445 // 2446 2447 // account all time, including bailouts and failures in this counter; 2448 // C1 and C2 counters are counting both successful and unsuccessful compiles 2449 _t_total_compilation.add(time); 2450 2451 if (!success) { 2452 _total_bailout_count++; 2453 if (UsePerfData) { 2454 _perf_last_failed_method->set_value(counters->current_method()); 2455 _perf_last_failed_type->set_value(counters->compile_type()); 2456 _perf_total_bailout_count->inc(); 2457 } 2458 _t_bailedout_compilation.add(time); 2459 } else if (code == NULL) { 2460 if (UsePerfData) { 2461 _perf_last_invalidated_method->set_value(counters->current_method()); 2462 _perf_last_invalidated_type->set_value(counters->compile_type()); 2463 _perf_total_invalidated_count->inc(); 2464 } 2465 _total_invalidated_count++; 2466 _t_invalidated_compilation.add(time); 2467 } else { 2468 // Compilation succeeded 2469 2470 // update compilation ticks - used by the implementation of 2471 // java.lang.management.CompilationMBean 2472 _perf_total_compilation->inc(time.ticks()); 2473 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2474 2475 if (CITime) { 2476 int bytes_compiled = method->code_size() + task->num_inlined_bytecodes(); 2477 if (is_osr) { 2478 _t_osr_compilation.add(time); 2479 _sum_osr_bytes_compiled += bytes_compiled; 2480 } else { 2481 _t_standard_compilation.add(time); 2482 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2483 } 2484 2485 #if INCLUDE_JVMCI 2486 AbstractCompiler* comp = compiler(task->comp_level()); 2487 if (comp) { 2488 CompilerStatistics* stats = comp->stats(); 2489 if (stats) { 2490 if (is_osr) { 2491 stats->_osr.update(time, bytes_compiled); 2492 } else { 2493 stats->_standard.update(time, bytes_compiled); 2494 } 2495 stats->_nmethods_size += code->total_size(); 2496 stats->_nmethods_code_size += code->insts_size(); 2497 } else { // if (!stats) 2498 assert(false, "Compiler statistics object must exist"); 2499 } 2500 } else { // if (!comp) 2501 assert(false, "Compiler object must exist"); 2502 } 2503 #endif // INCLUDE_JVMCI 2504 } 2505 2506 if (UsePerfData) { 2507 // save the name of the last method compiled 2508 _perf_last_method->set_value(counters->current_method()); 2509 _perf_last_compile_type->set_value(counters->compile_type()); 2510 _perf_last_compile_size->set_value(method->code_size() + 2511 task->num_inlined_bytecodes()); 2512 if (is_osr) { 2513 _perf_osr_compilation->inc(time.ticks()); 2514 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2515 } else { 2516 _perf_standard_compilation->inc(time.ticks()); 2517 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2518 } 2519 } 2520 2521 if (CITimeEach) { 2522 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2523 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2524 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2525 } 2526 2527 // Collect counts of successful compilations 2528 _sum_nmethod_size += code->total_size(); 2529 _sum_nmethod_code_size += code->insts_size(); 2530 _total_compile_count++; 2531 2532 if (UsePerfData) { 2533 _perf_sum_nmethod_size->inc( code->total_size()); 2534 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2535 _perf_total_compile_count->inc(); 2536 } 2537 2538 if (is_osr) { 2539 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2540 _total_osr_compile_count++; 2541 } else { 2542 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2543 _total_standard_compile_count++; 2544 } 2545 } 2546 // set the current method for the thread to null 2547 if (UsePerfData) counters->set_current_method(""); 2548 } 2549 2550 const char* CompileBroker::compiler_name(int comp_level) { 2551 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2552 if (comp == NULL) { 2553 return "no compiler"; 2554 } else { 2555 return (comp->name()); 2556 } 2557 } 2558 2559 #if INCLUDE_JVMCI 2560 void CompileBroker::print_times(AbstractCompiler* comp) { 2561 CompilerStatistics* stats = comp->stats(); 2562 if (stats) { 2563 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}", 2564 comp->name(), stats->bytes_per_second(), 2565 stats->_standard._time.seconds(), stats->_standard._bytes, stats->_standard._count, 2566 stats->_osr._time.seconds(), stats->_osr._bytes, stats->_osr._count, 2567 stats->_nmethods_size, stats->_nmethods_code_size); 2568 } else { // if (!stats) 2569 assert(false, "Compiler statistics object must exist"); 2570 } 2571 comp->print_timers(); 2572 } 2573 #endif // INCLUDE_JVMCI 2574 2575 void CompileBroker::print_times(bool per_compiler, bool aggregate) { 2576 #if INCLUDE_JVMCI 2577 elapsedTimer standard_compilation; 2578 elapsedTimer total_compilation; 2579 elapsedTimer osr_compilation; 2580 2581 int standard_bytes_compiled = 0; 2582 int osr_bytes_compiled = 0; 2583 2584 int standard_compile_count = 0; 2585 int osr_compile_count = 0; 2586 int total_compile_count = 0; 2587 2588 int nmethods_size = 0; 2589 int nmethods_code_size = 0; 2590 bool printedHeader = false; 2591 2592 for (unsigned int i = 0; i < sizeof(_compilers) / sizeof(AbstractCompiler*); i++) { 2593 AbstractCompiler* comp = _compilers[i]; 2594 if (comp != NULL) { 2595 if (per_compiler && aggregate && !printedHeader) { 2596 printedHeader = true; 2597 tty->cr(); 2598 tty->print_cr("Individual compiler times (for compiled methods only)"); 2599 tty->print_cr("------------------------------------------------"); 2600 tty->cr(); 2601 } 2602 CompilerStatistics* stats = comp->stats(); 2603 2604 if (stats) { 2605 standard_compilation.add(stats->_standard._time); 2606 osr_compilation.add(stats->_osr._time); 2607 2608 standard_bytes_compiled += stats->_standard._bytes; 2609 osr_bytes_compiled += stats->_osr._bytes; 2610 2611 standard_compile_count += stats->_standard._count; 2612 osr_compile_count += stats->_osr._count; 2613 2614 nmethods_size += stats->_nmethods_size; 2615 nmethods_code_size += stats->_nmethods_code_size; 2616 } else { // if (!stats) 2617 assert(false, "Compiler statistics object must exist"); 2618 } 2619 2620 if (per_compiler) { 2621 print_times(comp); 2622 } 2623 } 2624 } 2625 total_compile_count = osr_compile_count + standard_compile_count; 2626 total_compilation.add(osr_compilation); 2627 total_compilation.add(standard_compilation); 2628 2629 // In hosted mode, print the JVMCI compiler specific counters manually. 2630 if (!UseJVMCICompiler) { 2631 JVMCICompiler::print_compilation_timers(); 2632 } 2633 #else // INCLUDE_JVMCI 2634 elapsedTimer standard_compilation = CompileBroker::_t_standard_compilation; 2635 elapsedTimer osr_compilation = CompileBroker::_t_osr_compilation; 2636 elapsedTimer total_compilation = CompileBroker::_t_total_compilation; 2637 2638 int standard_bytes_compiled = CompileBroker::_sum_standard_bytes_compiled; 2639 int osr_bytes_compiled = CompileBroker::_sum_osr_bytes_compiled; 2640 2641 int standard_compile_count = CompileBroker::_total_standard_compile_count; 2642 int osr_compile_count = CompileBroker::_total_osr_compile_count; 2643 int total_compile_count = CompileBroker::_total_compile_count; 2644 2645 int nmethods_size = CompileBroker::_sum_nmethod_code_size; 2646 int nmethods_code_size = CompileBroker::_sum_nmethod_size; 2647 #endif // INCLUDE_JVMCI 2648 2649 if (!aggregate) { 2650 return; 2651 } 2652 tty->cr(); 2653 tty->print_cr("Accumulated compiler times"); 2654 tty->print_cr("----------------------------------------------------------"); 2655 //0000000000111111111122222222223333333333444444444455555555556666666666 2656 //0123456789012345678901234567890123456789012345678901234567890123456789 2657 tty->print_cr(" Total compilation time : %7.3f s", total_compilation.seconds()); 2658 tty->print_cr(" Standard compilation : %7.3f s, Average : %2.3f s", 2659 standard_compilation.seconds(), 2660 standard_compilation.seconds() / standard_compile_count); 2661 tty->print_cr(" Bailed out compilation : %7.3f s, Average : %2.3f s", 2662 CompileBroker::_t_bailedout_compilation.seconds(), 2663 CompileBroker::_t_bailedout_compilation.seconds() / CompileBroker::_total_bailout_count); 2664 tty->print_cr(" On stack replacement : %7.3f s, Average : %2.3f s", 2665 osr_compilation.seconds(), 2666 osr_compilation.seconds() / osr_compile_count); 2667 tty->print_cr(" Invalidated : %7.3f s, Average : %2.3f s", 2668 CompileBroker::_t_invalidated_compilation.seconds(), 2669 CompileBroker::_t_invalidated_compilation.seconds() / CompileBroker::_total_invalidated_count); 2670 2671 AbstractCompiler *comp = compiler(CompLevel_simple); 2672 if (comp != NULL) { 2673 tty->cr(); 2674 comp->print_timers(); 2675 } 2676 comp = compiler(CompLevel_full_optimization); 2677 if (comp != NULL) { 2678 tty->cr(); 2679 comp->print_timers(); 2680 } 2681 tty->cr(); 2682 tty->print_cr(" Total compiled methods : %8d methods", total_compile_count); 2683 tty->print_cr(" Standard compilation : %8d methods", standard_compile_count); 2684 tty->print_cr(" On stack replacement : %8d methods", osr_compile_count); 2685 int tcb = osr_bytes_compiled + standard_bytes_compiled; 2686 tty->print_cr(" Total compiled bytecodes : %8d bytes", tcb); 2687 tty->print_cr(" Standard compilation : %8d bytes", standard_bytes_compiled); 2688 tty->print_cr(" On stack replacement : %8d bytes", osr_bytes_compiled); 2689 double tcs = total_compilation.seconds(); 2690 int bps = tcs == 0.0 ? 0 : (int)(tcb / tcs); 2691 tty->print_cr(" Average compilation speed : %8d bytes/s", bps); 2692 tty->cr(); 2693 tty->print_cr(" nmethod code size : %8d bytes", nmethods_code_size); 2694 tty->print_cr(" nmethod total size : %8d bytes", nmethods_size); 2695 } 2696 2697 // Debugging output for failure 2698 void CompileBroker::print_last_compile() { 2699 if (_last_compile_level != CompLevel_none && 2700 compiler(_last_compile_level) != NULL && 2701 _last_compile_type != no_compile) { 2702 if (_last_compile_type == osr_compile) { 2703 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2704 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2705 } else { 2706 tty->print_cr("Last parse: %d+++(%d) %s", 2707 _compilation_id, _last_compile_level, _last_method_compiled); 2708 } 2709 } 2710 } 2711 2712 // Print general/accumulated JIT information. 2713 void CompileBroker::print_info(outputStream *out) { 2714 if (out == NULL) out = tty; 2715 out->cr(); 2716 out->print_cr("======================"); 2717 out->print_cr(" General JIT info "); 2718 out->print_cr("======================"); 2719 out->cr(); 2720 out->print_cr(" JIT is : %7s", should_compile_new_jobs() ? "on" : "off"); 2721 out->print_cr(" Compiler threads : %7d", (int)CICompilerCount); 2722 out->cr(); 2723 out->print_cr("CodeCache overview"); 2724 out->print_cr("--------------------------------------------------------"); 2725 out->cr(); 2726 out->print_cr(" Reserved size : " SIZE_FORMAT_W(7) " KB", CodeCache::max_capacity() / K); 2727 out->print_cr(" Committed size : " SIZE_FORMAT_W(7) " KB", CodeCache::capacity() / K); 2728 out->print_cr(" Unallocated capacity : " SIZE_FORMAT_W(7) " KB", CodeCache::unallocated_capacity() / K); 2729 out->cr(); 2730 2731 out->cr(); 2732 out->print_cr("CodeCache cleaning overview"); 2733 out->print_cr("--------------------------------------------------------"); 2734 out->cr(); 2735 NMethodSweeper::print(out); 2736 out->print_cr("--------------------------------------------------------"); 2737 out->cr(); 2738 } 2739 2740 // Note: tty_lock must not be held upon entry to this function. 2741 // Print functions called from herein do "micro-locking" on tty_lock. 2742 // That's a tradeoff which keeps together important blocks of output. 2743 // At the same time, continuous tty_lock hold time is kept in check, 2744 // preventing concurrently printing threads from stalling a long time. 2745 void CompileBroker::print_heapinfo(outputStream* out, const char* function, size_t granularity) { 2746 TimeStamp ts_total; 2747 TimeStamp ts; 2748 2749 bool allFun = !strcmp(function, "all"); 2750 bool aggregate = !strcmp(function, "aggregate") || !strcmp(function, "analyze") || allFun; 2751 bool usedSpace = !strcmp(function, "UsedSpace") || allFun; 2752 bool freeSpace = !strcmp(function, "FreeSpace") || allFun; 2753 bool methodCount = !strcmp(function, "MethodCount") || allFun; 2754 bool methodSpace = !strcmp(function, "MethodSpace") || allFun; 2755 bool methodAge = !strcmp(function, "MethodAge") || allFun; 2756 bool methodNames = !strcmp(function, "MethodNames") || allFun; 2757 bool discard = !strcmp(function, "discard") || allFun; 2758 2759 if (out == NULL) { 2760 out = tty; 2761 } 2762 2763 if (!(aggregate || usedSpace || freeSpace || methodCount || methodSpace || methodAge || methodNames || discard)) { 2764 out->print_cr("\n__ CodeHeapStateAnalytics: Function %s is not supported", function); 2765 out->cr(); 2766 return; 2767 } 2768 2769 ts_total.update(); // record starting point 2770 2771 if (aggregate) { 2772 print_info(out); 2773 } 2774 2775 // We hold the CodeHeapStateAnalytics_lock all the time, from here until we leave this function. 2776 // That helps us getting a consistent view on the CodeHeap, at least for the "all" function. 2777 // When we request individual parts of the analysis via the jcmd interface, it is possible 2778 // that in between another thread (another jcmd user or the vm running into CodeCache OOM) 2779 // updated the aggregated data. That's a tolerable tradeoff because we can't hold a lock 2780 // across user interaction. 2781 ts.update(); // record starting point 2782 MutexLockerEx mu1(CodeHeapStateAnalytics_lock, Mutex::_no_safepoint_check_flag); 2783 out->cr(); 2784 out->print_cr("__ CodeHeapStateAnalytics lock wait took %10.3f seconds _________", ts.seconds()); 2785 out->cr(); 2786 2787 if (aggregate) { 2788 // It is sufficient to hold the CodeCache_lock only for the aggregate step. 2789 // All other functions operate on aggregated data - except MethodNames, but that should be safe. 2790 // The separate CodeHeapStateAnalytics_lock protects the printing functions against 2791 // concurrent aggregate steps. Acquire this lock before acquiring the CodeCache_lock. 2792 // CodeHeapStateAnalytics_lock could be held by a concurrent thread for a long time, 2793 // leading to an unnecessarily long hold time of the CodeCache_lock. 2794 ts.update(); // record starting point 2795 MutexLockerEx mu2(CodeCache_lock, Mutex::_no_safepoint_check_flag); 2796 out->cr(); 2797 out->print_cr("__ CodeCache lock wait took %10.3f seconds _________", ts.seconds()); 2798 out->cr(); 2799 2800 ts.update(); // record starting point 2801 CodeCache::aggregate(out, granularity); 2802 out->cr(); 2803 out->print_cr("__ CodeCache lock hold took %10.3f seconds _________", ts.seconds()); 2804 out->cr(); 2805 } 2806 2807 if (usedSpace) CodeCache::print_usedSpace(out); 2808 if (freeSpace) CodeCache::print_freeSpace(out); 2809 if (methodCount) CodeCache::print_count(out); 2810 if (methodSpace) CodeCache::print_space(out); 2811 if (methodAge) CodeCache::print_age(out); 2812 if (methodNames) CodeCache::print_names(out); 2813 if (discard) CodeCache::discard(out); 2814 2815 out->cr(); 2816 out->print_cr("__ CodeHeapStateAnalytics total duration %10.3f seconds _________", ts_total.seconds()); 2817 out->cr(); 2818 }