1 /* 2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/systemDictionary.hpp" 27 #include "classfile/vmSymbols.hpp" 28 #include "code/codeCache.hpp" 29 #include "compiler/compileBroker.hpp" 30 #include "compiler/compileLog.hpp" 31 #include "compiler/compilerOracle.hpp" 32 #include "interpreter/linkResolver.hpp" 33 #include "memory/allocation.inline.hpp" 34 #include "oops/methodDataOop.hpp" 35 #include "oops/methodOop.hpp" 36 #include "oops/oop.inline.hpp" 37 #include "prims/nativeLookup.hpp" 38 #include "runtime/arguments.hpp" 39 #include "runtime/compilationPolicy.hpp" 40 #include "runtime/init.hpp" 41 #include "runtime/interfaceSupport.hpp" 42 #include "runtime/javaCalls.hpp" 43 #include "runtime/os.hpp" 44 #include "runtime/sharedRuntime.hpp" 45 #include "runtime/sweeper.hpp" 46 #include "utilities/dtrace.hpp" 47 #ifdef COMPILER1 48 #include "c1/c1_Compiler.hpp" 49 #endif 50 #ifdef COMPILER2 51 #include "opto/c2compiler.hpp" 52 #endif 53 #ifdef SHARK 54 #include "shark/sharkCompiler.hpp" 55 #endif 56 57 #ifdef DTRACE_ENABLED 58 59 // Only bother with this argument setup if dtrace is available 60 61 #ifndef USDT2 62 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, 63 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); 64 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, 65 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); 66 67 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ 68 { \ 69 char* comp_name = (char*)(compiler)->name(); \ 70 Symbol* klass_name = (method)->klass_name(); \ 71 Symbol* name = (method)->name(); \ 72 Symbol* signature = (method)->signature(); \ 73 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ 74 comp_name, strlen(comp_name), \ 75 klass_name->bytes(), klass_name->utf8_length(), \ 76 name->bytes(), name->utf8_length(), \ 77 signature->bytes(), signature->utf8_length()); \ 78 } 79 80 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ 81 { \ 82 char* comp_name = (char*)(compiler)->name(); \ 83 Symbol* klass_name = (method)->klass_name(); \ 84 Symbol* name = (method)->name(); \ 85 Symbol* signature = (method)->signature(); \ 86 HS_DTRACE_PROBE9(hotspot, method__compile__end, \ 87 comp_name, strlen(comp_name), \ 88 klass_name->bytes(), klass_name->utf8_length(), \ 89 name->bytes(), name->utf8_length(), \ 90 signature->bytes(), signature->utf8_length(), (success)); \ 91 } 92 93 #else /* USDT2 */ 94 95 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) \ 96 { \ 97 char* comp_name = (char*)(compiler)->name(); \ 98 Symbol* klass_name = (method)->klass_name(); \ 99 Symbol* name = (method)->name(); \ 100 Symbol* signature = (method)->signature(); \ 101 HOTSPOT_METHOD_COMPILE_BEGIN( \ 102 comp_name, strlen(comp_name), \ 103 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 104 (char *) name->bytes(), name->utf8_length(), \ 105 (char *) signature->bytes(), signature->utf8_length()); \ 106 } 107 108 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) \ 109 { \ 110 char* comp_name = (char*)(compiler)->name(); \ 111 Symbol* klass_name = (method)->klass_name(); \ 112 Symbol* name = (method)->name(); \ 113 Symbol* signature = (method)->signature(); \ 114 HOTSPOT_METHOD_COMPILE_END( \ 115 comp_name, strlen(comp_name), \ 116 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 117 (char *) name->bytes(), name->utf8_length(), \ 118 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 119 } 120 #endif /* USDT2 */ 121 122 #else // ndef DTRACE_ENABLED 123 124 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler, method) 125 #define DTRACE_METHOD_COMPILE_END_PROBE(compiler, method, success) 126 127 #endif // ndef DTRACE_ENABLED 128 129 bool CompileBroker::_initialized = false; 130 volatile bool CompileBroker::_should_block = false; 131 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 132 133 // The installed compiler(s) 134 AbstractCompiler* CompileBroker::_compilers[2]; 135 136 // These counters are used for assigning id's to each compilation 137 uint CompileBroker::_compilation_id = 0; 138 uint CompileBroker::_osr_compilation_id = 0; 139 140 // Debugging information 141 int CompileBroker::_last_compile_type = no_compile; 142 int CompileBroker::_last_compile_level = CompLevel_none; 143 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 144 145 // Performance counters 146 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 147 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 148 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 149 150 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 152 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 153 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 154 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 155 156 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 157 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 158 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 159 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 160 161 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 162 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 163 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 164 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 165 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 166 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 167 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 168 169 // Timers and counters for generating statistics 170 elapsedTimer CompileBroker::_t_total_compilation; 171 elapsedTimer CompileBroker::_t_osr_compilation; 172 elapsedTimer CompileBroker::_t_standard_compilation; 173 174 int CompileBroker::_total_bailout_count = 0; 175 int CompileBroker::_total_invalidated_count = 0; 176 int CompileBroker::_total_compile_count = 0; 177 int CompileBroker::_total_osr_compile_count = 0; 178 int CompileBroker::_total_standard_compile_count = 0; 179 180 int CompileBroker::_sum_osr_bytes_compiled = 0; 181 int CompileBroker::_sum_standard_bytes_compiled = 0; 182 int CompileBroker::_sum_nmethod_size = 0; 183 int CompileBroker::_sum_nmethod_code_size = 0; 184 185 CompileQueue* CompileBroker::_c2_method_queue = NULL; 186 CompileQueue* CompileBroker::_c1_method_queue = NULL; 187 CompileTask* CompileBroker::_task_free_list = NULL; 188 189 GrowableArray<CompilerThread*>* CompileBroker::_method_threads = NULL; 190 191 192 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 193 CompilerThread* thread = CompilerThread::current(); 194 thread->set_task(task); 195 CompileLog* log = thread->log(); 196 if (log != NULL) task->log_task_start(log); 197 } 198 199 CompileTaskWrapper::~CompileTaskWrapper() { 200 CompilerThread* thread = CompilerThread::current(); 201 CompileTask* task = thread->task(); 202 CompileLog* log = thread->log(); 203 if (log != NULL) task->log_task_done(log); 204 thread->set_task(NULL); 205 task->set_code_handle(NULL); 206 DEBUG_ONLY(thread->set_env((ciEnv*)badAddress)); 207 if (task->is_blocking()) { 208 MutexLocker notifier(task->lock(), thread); 209 task->mark_complete(); 210 // Notify the waiting thread that the compilation has completed. 211 task->lock()->notify_all(); 212 } else { 213 task->mark_complete(); 214 215 // By convention, the compiling thread is responsible for 216 // recycling a non-blocking CompileTask. 217 CompileBroker::free_task(task); 218 } 219 } 220 221 222 // ------------------------------------------------------------------ 223 // CompileTask::initialize 224 void CompileTask::initialize(int compile_id, 225 methodHandle method, 226 int osr_bci, 227 int comp_level, 228 methodHandle hot_method, 229 int hot_count, 230 const char* comment, 231 bool is_blocking) { 232 assert(!_lock->is_locked(), "bad locking"); 233 234 _compile_id = compile_id; 235 _method = JNIHandles::make_global(method); 236 _osr_bci = osr_bci; 237 _is_blocking = is_blocking; 238 _comp_level = comp_level; 239 _num_inlined_bytecodes = 0; 240 241 _is_complete = false; 242 _is_success = false; 243 _code_handle = NULL; 244 245 _hot_method = NULL; 246 _hot_count = hot_count; 247 _time_queued = 0; // tidy 248 _comment = comment; 249 250 if (LogCompilation) { 251 _time_queued = os::elapsed_counter(); 252 if (hot_method.not_null()) { 253 if (hot_method == method) { 254 _hot_method = _method; 255 } else { 256 _hot_method = JNIHandles::make_global(hot_method); 257 } 258 } 259 } 260 261 _next = NULL; 262 } 263 264 // ------------------------------------------------------------------ 265 // CompileTask::code/set_code 266 nmethod* CompileTask::code() const { 267 if (_code_handle == NULL) return NULL; 268 return _code_handle->code(); 269 } 270 void CompileTask::set_code(nmethod* nm) { 271 if (_code_handle == NULL && nm == NULL) return; 272 guarantee(_code_handle != NULL, ""); 273 _code_handle->set_code(nm); 274 if (nm == NULL) _code_handle = NULL; // drop the handle also 275 } 276 277 // ------------------------------------------------------------------ 278 // CompileTask::free 279 void CompileTask::free() { 280 set_code(NULL); 281 assert(!_lock->is_locked(), "Should not be locked when freed"); 282 if (_hot_method != NULL && _hot_method != _method) { 283 JNIHandles::destroy_global(_hot_method); 284 } 285 JNIHandles::destroy_global(_method); 286 } 287 288 289 // ------------------------------------------------------------------ 290 // CompileTask::print 291 void CompileTask::print() { 292 tty->print("<CompileTask compile_id=%d ", _compile_id); 293 tty->print("method="); 294 ((methodOop)JNIHandles::resolve(_method))->print_name(tty); 295 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", 296 _osr_bci, bool_to_str(_is_blocking), 297 bool_to_str(_is_complete), bool_to_str(_is_success)); 298 } 299 300 301 // ------------------------------------------------------------------ 302 // CompileTask::print_line_on_error 303 // 304 // This function is called by fatal error handler when the thread 305 // causing troubles is a compiler thread. 306 // 307 // Do not grab any lock, do not allocate memory. 308 // 309 // Otherwise it's the same as CompileTask::print_line() 310 // 311 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { 312 // print compiler name 313 st->print("%s:", CompileBroker::compiler(comp_level())->name()); 314 print_compilation(st); 315 } 316 317 // ------------------------------------------------------------------ 318 // CompileTask::print_line 319 void CompileTask::print_line() { 320 ttyLocker ttyl; // keep the following output all in one block 321 // print compiler name if requested 322 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler(comp_level())->name()); 323 print_compilation(); 324 } 325 326 327 // ------------------------------------------------------------------ 328 // CompileTask::print_compilation_impl 329 void CompileTask::print_compilation_impl(outputStream* st, methodOop method, int compile_id, int comp_level, bool is_osr_method, int osr_bci, bool is_blocking, const char* msg) { 330 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp 331 st->print("%4d ", compile_id); // print compilation number 332 333 // For unloaded methods the transition to zombie occurs after the 334 // method is cleared so it's impossible to report accurate 335 // information for that case. 336 bool is_synchronized = false; 337 bool has_exception_handler = false; 338 bool is_native = false; 339 if (method != NULL) { 340 is_synchronized = method->is_synchronized(); 341 has_exception_handler = method->has_exception_handler(); 342 is_native = method->is_native(); 343 } 344 // method attributes 345 const char compile_type = is_osr_method ? '%' : ' '; 346 const char sync_char = is_synchronized ? 's' : ' '; 347 const char exception_char = has_exception_handler ? '!' : ' '; 348 const char blocking_char = is_blocking ? 'b' : ' '; 349 const char native_char = is_native ? 'n' : ' '; 350 351 // print method attributes 352 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); 353 354 if (TieredCompilation) { 355 if (comp_level != -1) st->print("%d ", comp_level); 356 else st->print("- "); 357 } 358 st->print(" "); // more indent 359 360 if (method == NULL) { 361 st->print("(method)"); 362 } else { 363 method->print_short_name(st); 364 if (is_osr_method) { 365 st->print(" @ %d", osr_bci); 366 } 367 st->print(" (%d bytes)", method->code_size()); 368 } 369 370 if (msg != NULL) { 371 st->print(" %s", msg); 372 } 373 st->cr(); 374 } 375 376 // ------------------------------------------------------------------ 377 // CompileTask::print_inlining 378 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { 379 // 1234567 380 st->print(" "); // print timestamp 381 // 1234 382 st->print(" "); // print compilation number 383 384 // method attributes 385 const char sync_char = method->is_synchronized() ? 's' : ' '; 386 const char exception_char = method->has_exception_handlers() ? '!' : ' '; 387 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; 388 389 // print method attributes 390 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); 391 392 if (TieredCompilation) { 393 st->print(" "); 394 } 395 st->print(" "); // more indent 396 st->print(" "); // initial inlining indent 397 398 for (int i = 0; i < inline_level; i++) st->print(" "); 399 400 st->print("@ %d ", bci); // print bci 401 method->print_short_name(st); 402 st->print(" (%d bytes)", method->code_size()); 403 404 if (msg != NULL) { 405 st->print(" %s", msg); 406 } 407 st->cr(); 408 } 409 410 // ------------------------------------------------------------------ 411 // CompileTask::print_inline_indent 412 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { 413 // 1234567 414 st->print(" "); // print timestamp 415 // 1234 416 st->print(" "); // print compilation number 417 // %s!bn 418 st->print(" "); // print method attributes 419 if (TieredCompilation) { 420 st->print(" "); 421 } 422 st->print(" "); // more indent 423 st->print(" "); // initial inlining indent 424 for (int i = 0; i < inline_level; i++) st->print(" "); 425 } 426 427 // ------------------------------------------------------------------ 428 // CompileTask::print_compilation 429 void CompileTask::print_compilation(outputStream* st) { 430 oop rem = JNIHandles::resolve(method_handle()); 431 assert(rem != NULL && rem->is_method(), "must be"); 432 methodOop method = (methodOop) rem; 433 bool is_osr_method = osr_bci() != InvocationEntryBci; 434 print_compilation_impl(st, method, compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking()); 435 } 436 437 // ------------------------------------------------------------------ 438 // CompileTask::log_task 439 void CompileTask::log_task(xmlStream* log) { 440 Thread* thread = Thread::current(); 441 methodHandle method(thread, 442 (methodOop)JNIHandles::resolve(method_handle())); 443 ResourceMark rm(thread); 444 445 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> 446 if (_compile_id != 0) log->print(" compile_id='%d'", _compile_id); 447 if (_osr_bci != CompileBroker::standard_entry_bci) { 448 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind 449 } // else compile_kind='c2c' 450 if (!method.is_null()) log->method(method); 451 if (_osr_bci != CompileBroker::standard_entry_bci) { 452 log->print(" osr_bci='%d'", _osr_bci); 453 } 454 if (_comp_level != CompLevel_highest_tier) { 455 log->print(" level='%d'", _comp_level); 456 } 457 if (_is_blocking) { 458 log->print(" blocking='1'"); 459 } 460 log->stamp(); 461 } 462 463 464 // ------------------------------------------------------------------ 465 // CompileTask::log_task_queued 466 void CompileTask::log_task_queued() { 467 Thread* thread = Thread::current(); 468 ttyLocker ttyl; 469 ResourceMark rm(thread); 470 471 xtty->begin_elem("task_queued"); 472 log_task(xtty); 473 if (_comment != NULL) { 474 xtty->print(" comment='%s'", _comment); 475 } 476 if (_hot_method != NULL) { 477 methodHandle hot(thread, 478 (methodOop)JNIHandles::resolve(_hot_method)); 479 methodHandle method(thread, 480 (methodOop)JNIHandles::resolve(_method)); 481 if (hot() != method()) { 482 xtty->method(hot); 483 } 484 } 485 if (_hot_count != 0) { 486 xtty->print(" hot_count='%d'", _hot_count); 487 } 488 xtty->end_elem(); 489 } 490 491 492 // ------------------------------------------------------------------ 493 // CompileTask::log_task_start 494 void CompileTask::log_task_start(CompileLog* log) { 495 log->begin_head("task"); 496 log_task(log); 497 log->end_head(); 498 } 499 500 501 // ------------------------------------------------------------------ 502 // CompileTask::log_task_done 503 void CompileTask::log_task_done(CompileLog* log) { 504 Thread* thread = Thread::current(); 505 methodHandle method(thread, 506 (methodOop)JNIHandles::resolve(method_handle())); 507 ResourceMark rm(thread); 508 509 // <task_done ... stamp='1.234'> </task> 510 nmethod* nm = code(); 511 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", 512 _is_success, nm == NULL ? 0 : nm->content_size(), 513 method->invocation_count()); 514 int bec = method->backedge_count(); 515 if (bec != 0) log->print(" backedge_count='%d'", bec); 516 // Note: "_is_complete" is about to be set, but is not. 517 if (_num_inlined_bytecodes != 0) { 518 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); 519 } 520 log->stamp(); 521 log->end_elem(); 522 log->tail("task"); 523 log->clear_identities(); // next task will have different CI 524 if (log->unflushed_count() > 2000) { 525 log->flush(); 526 } 527 log->mark_file_end(); 528 } 529 530 531 532 // ------------------------------------------------------------------ 533 // CompileQueue::add 534 // 535 // Add a CompileTask to a CompileQueue 536 void CompileQueue::add(CompileTask* task) { 537 assert(lock()->owned_by_self(), "must own lock"); 538 539 task->set_next(NULL); 540 task->set_prev(NULL); 541 542 if (_last == NULL) { 543 // The compile queue is empty. 544 assert(_first == NULL, "queue is empty"); 545 _first = task; 546 _last = task; 547 } else { 548 // Append the task to the queue. 549 assert(_last->next() == NULL, "not last"); 550 _last->set_next(task); 551 task->set_prev(_last); 552 _last = task; 553 } 554 ++_size; 555 556 // Mark the method as being in the compile queue. 557 ((methodOop)JNIHandles::resolve(task->method_handle()))->set_queued_for_compilation(); 558 559 if (CIPrintCompileQueue) { 560 print(); 561 } 562 563 if (LogCompilation && xtty != NULL) { 564 task->log_task_queued(); 565 } 566 567 // Notify CompilerThreads that a task is available. 568 lock()->notify_all(); 569 } 570 571 // ------------------------------------------------------------------ 572 // CompileQueue::get 573 // 574 // Get the next CompileTask from a CompileQueue 575 CompileTask* CompileQueue::get() { 576 NMethodSweeper::possibly_sweep(); 577 578 MutexLocker locker(lock()); 579 // Wait for an available CompileTask. 580 while (_first == NULL) { 581 // There is no work to be done right now. Wait. 582 if (UseCodeCacheFlushing && (!CompileBroker::should_compile_new_jobs() || CodeCache::needs_flushing())) { 583 // During the emergency sweeping periods, wake up and sweep occasionally 584 bool timedout = lock()->wait(!Mutex::_no_safepoint_check_flag, NmethodSweepCheckInterval*1000); 585 if (timedout) { 586 MutexUnlocker ul(lock()); 587 // When otherwise not busy, run nmethod sweeping 588 NMethodSweeper::possibly_sweep(); 589 } 590 } else { 591 // During normal operation no need to wake up on timer 592 lock()->wait(); 593 } 594 } 595 CompileTask* task = CompilationPolicy::policy()->select_task(this); 596 remove(task); 597 return task; 598 } 599 600 void CompileQueue::remove(CompileTask* task) 601 { 602 assert(lock()->owned_by_self(), "must own lock"); 603 if (task->prev() != NULL) { 604 task->prev()->set_next(task->next()); 605 } else { 606 // max is the first element 607 assert(task == _first, "Sanity"); 608 _first = task->next(); 609 } 610 611 if (task->next() != NULL) { 612 task->next()->set_prev(task->prev()); 613 } else { 614 // max is the last element 615 assert(task == _last, "Sanity"); 616 _last = task->prev(); 617 } 618 --_size; 619 } 620 621 // ------------------------------------------------------------------ 622 // CompileQueue::print 623 void CompileQueue::print() { 624 tty->print_cr("Contents of %s", name()); 625 tty->print_cr("----------------------"); 626 CompileTask* task = _first; 627 while (task != NULL) { 628 task->print_line(); 629 task = task->next(); 630 } 631 tty->print_cr("----------------------"); 632 } 633 634 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { 635 636 _current_method[0] = '\0'; 637 _compile_type = CompileBroker::no_compile; 638 639 if (UsePerfData) { 640 ResourceMark rm; 641 642 // create the thread instance name space string - don't create an 643 // instance subspace if instance is -1 - keeps the adapterThread 644 // counters from having a ".0" namespace. 645 const char* thread_i = (instance == -1) ? thread_name : 646 PerfDataManager::name_space(thread_name, instance); 647 648 649 char* name = PerfDataManager::counter_name(thread_i, "method"); 650 _perf_current_method = 651 PerfDataManager::create_string_variable(SUN_CI, name, 652 cmname_buffer_length, 653 _current_method, CHECK); 654 655 name = PerfDataManager::counter_name(thread_i, "type"); 656 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, 657 PerfData::U_None, 658 (jlong)_compile_type, 659 CHECK); 660 661 name = PerfDataManager::counter_name(thread_i, "time"); 662 _perf_time = PerfDataManager::create_counter(SUN_CI, name, 663 PerfData::U_Ticks, CHECK); 664 665 name = PerfDataManager::counter_name(thread_i, "compiles"); 666 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, 667 PerfData::U_Events, CHECK); 668 } 669 } 670 671 // ------------------------------------------------------------------ 672 // CompileBroker::compilation_init 673 // 674 // Initialize the Compilation object 675 void CompileBroker::compilation_init() { 676 _last_method_compiled[0] = '\0'; 677 678 #ifndef SHARK 679 // Set the interface to the current compiler(s). 680 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 681 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 682 #ifdef COMPILER1 683 if (c1_count > 0) { 684 _compilers[0] = new Compiler(); 685 } 686 #endif // COMPILER1 687 688 #ifdef COMPILER2 689 if (c2_count > 0) { 690 _compilers[1] = new C2Compiler(); 691 } 692 #endif // COMPILER2 693 694 #else // SHARK 695 int c1_count = 0; 696 int c2_count = 1; 697 698 _compilers[1] = new SharkCompiler(); 699 #endif // SHARK 700 701 // Initialize the CompileTask free list 702 _task_free_list = NULL; 703 704 // Start the CompilerThreads 705 init_compiler_threads(c1_count, c2_count); 706 // totalTime performance counter is always created as it is required 707 // by the implementation of java.lang.management.CompilationMBean. 708 { 709 EXCEPTION_MARK; 710 _perf_total_compilation = 711 PerfDataManager::create_counter(JAVA_CI, "totalTime", 712 PerfData::U_Ticks, CHECK); 713 } 714 715 716 if (UsePerfData) { 717 718 EXCEPTION_MARK; 719 720 // create the jvmstat performance counters 721 _perf_osr_compilation = 722 PerfDataManager::create_counter(SUN_CI, "osrTime", 723 PerfData::U_Ticks, CHECK); 724 725 _perf_standard_compilation = 726 PerfDataManager::create_counter(SUN_CI, "standardTime", 727 PerfData::U_Ticks, CHECK); 728 729 _perf_total_bailout_count = 730 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 731 PerfData::U_Events, CHECK); 732 733 _perf_total_invalidated_count = 734 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 735 PerfData::U_Events, CHECK); 736 737 _perf_total_compile_count = 738 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 739 PerfData::U_Events, CHECK); 740 _perf_total_osr_compile_count = 741 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 742 PerfData::U_Events, CHECK); 743 744 _perf_total_standard_compile_count = 745 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 746 PerfData::U_Events, CHECK); 747 748 _perf_sum_osr_bytes_compiled = 749 PerfDataManager::create_counter(SUN_CI, "osrBytes", 750 PerfData::U_Bytes, CHECK); 751 752 _perf_sum_standard_bytes_compiled = 753 PerfDataManager::create_counter(SUN_CI, "standardBytes", 754 PerfData::U_Bytes, CHECK); 755 756 _perf_sum_nmethod_size = 757 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 758 PerfData::U_Bytes, CHECK); 759 760 _perf_sum_nmethod_code_size = 761 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 762 PerfData::U_Bytes, CHECK); 763 764 _perf_last_method = 765 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 766 CompilerCounters::cmname_buffer_length, 767 "", CHECK); 768 769 _perf_last_failed_method = 770 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 771 CompilerCounters::cmname_buffer_length, 772 "", CHECK); 773 774 _perf_last_invalidated_method = 775 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 776 CompilerCounters::cmname_buffer_length, 777 "", CHECK); 778 779 _perf_last_compile_type = 780 PerfDataManager::create_variable(SUN_CI, "lastType", 781 PerfData::U_None, 782 (jlong)CompileBroker::no_compile, 783 CHECK); 784 785 _perf_last_compile_size = 786 PerfDataManager::create_variable(SUN_CI, "lastSize", 787 PerfData::U_Bytes, 788 (jlong)CompileBroker::no_compile, 789 CHECK); 790 791 792 _perf_last_failed_type = 793 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 794 PerfData::U_None, 795 (jlong)CompileBroker::no_compile, 796 CHECK); 797 798 _perf_last_invalidated_type = 799 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 800 PerfData::U_None, 801 (jlong)CompileBroker::no_compile, 802 CHECK); 803 } 804 805 _initialized = true; 806 } 807 808 809 810 // ------------------------------------------------------------------ 811 // CompileBroker::make_compiler_thread 812 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { 813 CompilerThread* compiler_thread = NULL; 814 815 klassOop k = 816 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), 817 true, CHECK_0); 818 instanceKlassHandle klass (THREAD, k); 819 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 820 Handle string = java_lang_String::create_from_str(name, CHECK_0); 821 822 // Initialize thread_oop to put it into the system threadGroup 823 Handle thread_group (THREAD, Universe::system_thread_group()); 824 JavaValue result(T_VOID); 825 JavaCalls::call_special(&result, thread_oop, 826 klass, 827 vmSymbols::object_initializer_name(), 828 vmSymbols::threadgroup_string_void_signature(), 829 thread_group, 830 string, 831 CHECK_0); 832 833 { 834 MutexLocker mu(Threads_lock, THREAD); 835 compiler_thread = new CompilerThread(queue, counters); 836 // At this point the new CompilerThread data-races with this startup 837 // thread (which I believe is the primoridal thread and NOT the VM 838 // thread). This means Java bytecodes being executed at startup can 839 // queue compile jobs which will run at whatever default priority the 840 // newly created CompilerThread runs at. 841 842 843 // At this point it may be possible that no osthread was created for the 844 // JavaThread due to lack of memory. We would have to throw an exception 845 // in that case. However, since this must work and we do not allow 846 // exceptions anyway, check and abort if this fails. 847 848 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ 849 vm_exit_during_initialization("java.lang.OutOfMemoryError", 850 "unable to create new native thread"); 851 } 852 853 java_lang_Thread::set_thread(thread_oop(), compiler_thread); 854 855 // Note that this only sets the JavaThread _priority field, which by 856 // definition is limited to Java priorities and not OS priorities. 857 // The os-priority is set in the CompilerThread startup code itself 858 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 859 // CLEANUP PRIORITIES: This -if- statement hids a bug whereby the compiler 860 // threads never have their OS priority set. The assumption here is to 861 // enable the Performance group to do flag tuning, figure out a suitable 862 // CompilerThreadPriority, and then remove this 'if' statement (and 863 // comment) and unconditionally set the priority. 864 865 // Compiler Threads should be at the highest Priority 866 if ( CompilerThreadPriority != -1 ) 867 os::set_native_priority( compiler_thread, CompilerThreadPriority ); 868 else 869 os::set_native_priority( compiler_thread, os::java_to_os_priority[NearMaxPriority]); 870 871 // Note that I cannot call os::set_priority because it expects Java 872 // priorities and I am *explicitly* using OS priorities so that it's 873 // possible to set the compiler thread priority higher than any Java 874 // thread. 875 876 java_lang_Thread::set_daemon(thread_oop()); 877 878 compiler_thread->set_threadObj(thread_oop()); 879 Threads::add(compiler_thread); 880 Thread::start(compiler_thread); 881 } 882 // Let go of Threads_lock before yielding 883 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 884 885 return compiler_thread; 886 } 887 888 889 // ------------------------------------------------------------------ 890 // CompileBroker::init_compiler_threads 891 // 892 // Initialize the compilation queue 893 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { 894 EXCEPTION_MARK; 895 #if !defined(ZERO) && !defined(SHARK) 896 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 897 #endif // !ZERO && !SHARK 898 if (c2_compiler_count > 0) { 899 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); 900 } 901 if (c1_compiler_count > 0) { 902 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); 903 } 904 905 int compiler_count = c1_compiler_count + c2_compiler_count; 906 907 _method_threads = 908 new (ResourceObj::C_HEAP) GrowableArray<CompilerThread*>(compiler_count, true); 909 910 char name_buffer[256]; 911 for (int i = 0; i < c2_compiler_count; i++) { 912 // Create a name for our thread. 913 sprintf(name_buffer, "C2 CompilerThread%d", i); 914 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 915 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); 916 _method_threads->append(new_thread); 917 } 918 919 for (int i = c2_compiler_count; i < compiler_count; i++) { 920 // Create a name for our thread. 921 sprintf(name_buffer, "C1 CompilerThread%d", i); 922 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 923 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); 924 _method_threads->append(new_thread); 925 } 926 927 if (UsePerfData) { 928 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, 929 compiler_count, CHECK); 930 } 931 } 932 933 // ------------------------------------------------------------------ 934 // CompileBroker::is_idle 935 bool CompileBroker::is_idle() { 936 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { 937 return false; 938 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { 939 return false; 940 } else { 941 int num_threads = _method_threads->length(); 942 for (int i=0; i<num_threads; i++) { 943 if (_method_threads->at(i)->task() != NULL) { 944 return false; 945 } 946 } 947 948 // No pending or active compilations. 949 return true; 950 } 951 } 952 953 954 // ------------------------------------------------------------------ 955 // CompileBroker::compile_method 956 // 957 // Request compilation of a method. 958 void CompileBroker::compile_method_base(methodHandle method, 959 int osr_bci, 960 int comp_level, 961 methodHandle hot_method, 962 int hot_count, 963 const char* comment, 964 TRAPS) { 965 // do nothing if compiler thread(s) is not available 966 if (!_initialized ) { 967 return; 968 } 969 970 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 971 assert(method->method_holder()->klass_part()->oop_is_instance(), 972 "sanity check"); 973 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), 974 "method holder must be initialized"); 975 976 if (CIPrintRequests) { 977 tty->print("request: "); 978 method->print_short_name(tty); 979 if (osr_bci != InvocationEntryBci) { 980 tty->print(" osr_bci: %d", osr_bci); 981 } 982 tty->print(" comment: %s count: %d", comment, hot_count); 983 if (!hot_method.is_null()) { 984 tty->print(" hot: "); 985 if (hot_method() != method()) { 986 hot_method->print_short_name(tty); 987 } else { 988 tty->print("yes"); 989 } 990 } 991 tty->cr(); 992 } 993 994 // A request has been made for compilation. Before we do any 995 // real work, check to see if the method has been compiled 996 // in the meantime with a definitive result. 997 if (compilation_is_complete(method, osr_bci, comp_level)) { 998 return; 999 } 1000 1001 #ifndef PRODUCT 1002 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1003 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1004 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1005 return; 1006 } 1007 } 1008 #endif 1009 1010 // If this method is already in the compile queue, then 1011 // we do not block the current thread. 1012 if (compilation_is_in_queue(method, osr_bci)) { 1013 // We may want to decay our counter a bit here to prevent 1014 // multiple denied requests for compilation. This is an 1015 // open compilation policy issue. Note: The other possibility, 1016 // in the case that this is a blocking compile request, is to have 1017 // all subsequent blocking requesters wait for completion of 1018 // ongoing compiles. Note that in this case we'll need a protocol 1019 // for freeing the associated compile tasks. [Or we could have 1020 // a single static monitor on which all these waiters sleep.] 1021 return; 1022 } 1023 1024 // If the requesting thread is holding the pending list lock 1025 // then we just return. We can't risk blocking while holding 1026 // the pending list lock or a 3-way deadlock may occur 1027 // between the reference handler thread, a GC (instigated 1028 // by a compiler thread), and compiled method registration. 1029 if (instanceRefKlass::owns_pending_list_lock(JavaThread::current())) { 1030 return; 1031 } 1032 1033 // Outputs from the following MutexLocker block: 1034 CompileTask* task = NULL; 1035 bool blocking = false; 1036 CompileQueue* queue = compile_queue(comp_level); 1037 1038 // Acquire our lock. 1039 { 1040 MutexLocker locker(queue->lock(), THREAD); 1041 1042 // Make sure the method has not slipped into the queues since 1043 // last we checked; note that those checks were "fast bail-outs". 1044 // Here we need to be more careful, see 14012000 below. 1045 if (compilation_is_in_queue(method, osr_bci)) { 1046 return; 1047 } 1048 1049 // We need to check again to see if the compilation has 1050 // completed. A previous compilation may have registered 1051 // some result. 1052 if (compilation_is_complete(method, osr_bci, comp_level)) { 1053 return; 1054 } 1055 1056 // We now know that this compilation is not pending, complete, 1057 // or prohibited. Assign a compile_id to this compilation 1058 // and check to see if it is in our [Start..Stop) range. 1059 uint compile_id = assign_compile_id(method, osr_bci); 1060 if (compile_id == 0) { 1061 // The compilation falls outside the allowed range. 1062 return; 1063 } 1064 1065 // Should this thread wait for completion of the compile? 1066 blocking = is_compile_blocking(method, osr_bci); 1067 1068 // We will enter the compilation in the queue. 1069 // 14012000: Note that this sets the queued_for_compile bits in 1070 // the target method. We can now reason that a method cannot be 1071 // queued for compilation more than once, as follows: 1072 // Before a thread queues a task for compilation, it first acquires 1073 // the compile queue lock, then checks if the method's queued bits 1074 // are set or it has already been compiled. Thus there can not be two 1075 // instances of a compilation task for the same method on the 1076 // compilation queue. Consider now the case where the compilation 1077 // thread has already removed a task for that method from the queue 1078 // and is in the midst of compiling it. In this case, the 1079 // queued_for_compile bits must be set in the method (and these 1080 // will be visible to the current thread, since the bits were set 1081 // under protection of the compile queue lock, which we hold now. 1082 // When the compilation completes, the compiler thread first sets 1083 // the compilation result and then clears the queued_for_compile 1084 // bits. Neither of these actions are protected by a barrier (or done 1085 // under the protection of a lock), so the only guarantee we have 1086 // (on machines with TSO (Total Store Order)) is that these values 1087 // will update in that order. As a result, the only combinations of 1088 // these bits that the current thread will see are, in temporal order: 1089 // <RESULT, QUEUE> : 1090 // <0, 1> : in compile queue, but not yet compiled 1091 // <1, 1> : compiled but queue bit not cleared 1092 // <1, 0> : compiled and queue bit cleared 1093 // Because we first check the queue bits then check the result bits, 1094 // we are assured that we cannot introduce a duplicate task. 1095 // Note that if we did the tests in the reverse order (i.e. check 1096 // result then check queued bit), we could get the result bit before 1097 // the compilation completed, and the queue bit after the compilation 1098 // completed, and end up introducing a "duplicate" (redundant) task. 1099 // In that case, the compiler thread should first check if a method 1100 // has already been compiled before trying to compile it. 1101 // NOTE: in the event that there are multiple compiler threads and 1102 // there is de-optimization/recompilation, things will get hairy, 1103 // and in that case it's best to protect both the testing (here) of 1104 // these bits, and their updating (here and elsewhere) under a 1105 // common lock. 1106 task = create_compile_task(queue, 1107 compile_id, method, 1108 osr_bci, comp_level, 1109 hot_method, hot_count, comment, 1110 blocking); 1111 } 1112 1113 if (blocking) { 1114 wait_for_completion(task); 1115 } 1116 } 1117 1118 1119 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, 1120 int comp_level, 1121 methodHandle hot_method, int hot_count, 1122 const char* comment, TRAPS) { 1123 // make sure arguments make sense 1124 assert(method->method_holder()->klass_part()->oop_is_instance(), "not an instance method"); 1125 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1126 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1127 assert(!instanceKlass::cast(method->method_holder())->is_not_initialized(), "method holder must be initialized"); 1128 1129 if (!TieredCompilation) { 1130 comp_level = CompLevel_highest_tier; 1131 } 1132 1133 // return quickly if possible 1134 1135 // lock, make sure that the compilation 1136 // isn't prohibited in a straightforward way. 1137 1138 if (compiler(comp_level) == NULL || compilation_is_prohibited(method, osr_bci, comp_level)) { 1139 return NULL; 1140 } 1141 1142 if (osr_bci == InvocationEntryBci) { 1143 // standard compilation 1144 nmethod* method_code = method->code(); 1145 if (method_code != NULL) { 1146 if (compilation_is_complete(method, osr_bci, comp_level)) { 1147 return method_code; 1148 } 1149 } 1150 if (method->is_not_compilable(comp_level)) return NULL; 1151 1152 if (UseCodeCacheFlushing) { 1153 nmethod* saved = CodeCache::find_and_remove_saved_code(method()); 1154 if (saved != NULL) { 1155 method->set_code(method, saved); 1156 return saved; 1157 } 1158 } 1159 1160 } else { 1161 // osr compilation 1162 #ifndef TIERED 1163 // seems like an assert of dubious value 1164 assert(comp_level == CompLevel_highest_tier, 1165 "all OSR compiles are assumed to be at a single compilation level"); 1166 #endif // TIERED 1167 // We accept a higher level osr method 1168 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1169 if (nm != NULL) return nm; 1170 if (method->is_not_osr_compilable()) return NULL; 1171 } 1172 1173 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1174 // some prerequisites that are compiler specific 1175 if (compiler(comp_level)->is_c2() || compiler(comp_level)->is_shark()) { 1176 method->constants()->resolve_string_constants(CHECK_0); 1177 // Resolve all classes seen in the signature of the method 1178 // we are compiling. 1179 methodOopDesc::load_signature_classes(method, CHECK_0); 1180 } 1181 1182 // If the method is native, do the lookup in the thread requesting 1183 // the compilation. Native lookups can load code, which is not 1184 // permitted during compilation. 1185 // 1186 // Note: A native method implies non-osr compilation which is 1187 // checked with an assertion at the entry of this method. 1188 if (method->is_native()) { 1189 bool in_base_library; 1190 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1191 if (HAS_PENDING_EXCEPTION) { 1192 // In case of an exception looking up the method, we just forget 1193 // about it. The interpreter will kick-in and throw the exception. 1194 method->set_not_compilable(); // implies is_not_osr_compilable() 1195 CLEAR_PENDING_EXCEPTION; 1196 return NULL; 1197 } 1198 assert(method->has_native_function(), "must have native code by now"); 1199 } 1200 1201 // RedefineClasses() has replaced this method; just return 1202 if (method->is_old()) { 1203 return NULL; 1204 } 1205 1206 // JVMTI -- post_compile_event requires jmethod_id() that may require 1207 // a lock the compiling thread can not acquire. Prefetch it here. 1208 if (JvmtiExport::should_post_compiled_method_load()) { 1209 method->jmethod_id(); 1210 } 1211 1212 // If the compiler is shut off due to code cache flushing or otherwise, 1213 // fail out now so blocking compiles dont hang the java thread 1214 if (!should_compile_new_jobs() || (UseCodeCacheFlushing && CodeCache::needs_flushing())) { 1215 CompilationPolicy::policy()->delay_compilation(method()); 1216 return NULL; 1217 } 1218 1219 // do the compilation 1220 if (method->is_native()) { 1221 if (!PreferInterpreterNativeStubs) { 1222 // Acquire our lock. 1223 int compile_id; 1224 { 1225 MutexLocker locker(MethodCompileQueue_lock, THREAD); 1226 compile_id = assign_compile_id(method, standard_entry_bci); 1227 } 1228 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); 1229 } else { 1230 return NULL; 1231 } 1232 } else { 1233 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, CHECK_0); 1234 } 1235 1236 // return requested nmethod 1237 // We accept a higher level osr method 1238 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1239 } 1240 1241 1242 // ------------------------------------------------------------------ 1243 // CompileBroker::compilation_is_complete 1244 // 1245 // See if compilation of this method is already complete. 1246 bool CompileBroker::compilation_is_complete(methodHandle method, 1247 int osr_bci, 1248 int comp_level) { 1249 bool is_osr = (osr_bci != standard_entry_bci); 1250 if (is_osr) { 1251 if (method->is_not_osr_compilable()) { 1252 return true; 1253 } else { 1254 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1255 return (result != NULL); 1256 } 1257 } else { 1258 if (method->is_not_compilable(comp_level)) { 1259 return true; 1260 } else { 1261 nmethod* result = method->code(); 1262 if (result == NULL) return false; 1263 #ifdef COMPILER1 1264 if (C1ProfileInlining && result->needs_recomp()) { 1265 return false; 1266 } 1267 #endif 1268 return comp_level == result->comp_level(); 1269 } 1270 } 1271 } 1272 1273 1274 // ------------------------------------------------------------------ 1275 // CompileBroker::compilation_is_in_queue 1276 // 1277 // See if this compilation is already requested. 1278 // 1279 // Implementation note: there is only a single "is in queue" bit 1280 // for each method. This means that the check below is overly 1281 // conservative in the sense that an osr compilation in the queue 1282 // will block a normal compilation from entering the queue (and vice 1283 // versa). This can be remedied by a full queue search to disambiguate 1284 // cases. If it is deemed profitible, this may be done. 1285 bool CompileBroker::compilation_is_in_queue(methodHandle method, 1286 int osr_bci) { 1287 return method->queued_for_compilation(); 1288 } 1289 1290 // ------------------------------------------------------------------ 1291 // CompileBroker::compilation_is_prohibited 1292 // 1293 // See if this compilation is not allowed. 1294 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { 1295 bool is_native = method->is_native(); 1296 // Some compilers may not support the compilation of natives. 1297 if (is_native && 1298 (!CICompileNatives || !compiler(comp_level)->supports_native())) { 1299 method->set_not_compilable_quietly(comp_level); 1300 return true; 1301 } 1302 1303 bool is_osr = (osr_bci != standard_entry_bci); 1304 // Some compilers may not support on stack replacement. 1305 if (is_osr && 1306 (!CICompileOSR || !compiler(comp_level)->supports_osr())) { 1307 method->set_not_osr_compilable(); 1308 return true; 1309 } 1310 1311 // The method may be explicitly excluded by the user. 1312 bool quietly; 1313 if (CompilerOracle::should_exclude(method, quietly)) { 1314 if (!quietly) { 1315 // This does not happen quietly... 1316 ResourceMark rm; 1317 tty->print("### Excluding %s:%s", 1318 method->is_native() ? "generation of native wrapper" : "compile", 1319 (method->is_static() ? " static" : "")); 1320 method->print_short_name(tty); 1321 tty->cr(); 1322 } 1323 method->set_not_compilable_quietly(); 1324 } 1325 1326 return false; 1327 } 1328 1329 1330 // ------------------------------------------------------------------ 1331 // CompileBroker::assign_compile_id 1332 // 1333 // Assign a serialized id number to this compilation request. If the 1334 // number falls out of the allowed range, return a 0. OSR 1335 // compilations may be numbered separately from regular compilations 1336 // if certain debugging flags are used. 1337 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { 1338 assert(MethodCompileQueue_lock->owner() == Thread::current(), 1339 "must hold the compilation queue lock"); 1340 bool is_osr = (osr_bci != standard_entry_bci); 1341 uint id; 1342 if (CICountOSR && is_osr) { 1343 id = ++_osr_compilation_id; 1344 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { 1345 return id; 1346 } 1347 } else { 1348 id = ++_compilation_id; 1349 if ((uint)CIStart <= id && id < (uint)CIStop) { 1350 return id; 1351 } 1352 } 1353 1354 // Method was not in the appropriate compilation range. 1355 method->set_not_compilable_quietly(); 1356 return 0; 1357 } 1358 1359 1360 // ------------------------------------------------------------------ 1361 // CompileBroker::is_compile_blocking 1362 // 1363 // Should the current thread be blocked until this compilation request 1364 // has been fulfilled? 1365 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { 1366 assert(!instanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); 1367 return !BackgroundCompilation; 1368 } 1369 1370 1371 // ------------------------------------------------------------------ 1372 // CompileBroker::preload_classes 1373 void CompileBroker::preload_classes(methodHandle method, TRAPS) { 1374 // Move this code over from c1_Compiler.cpp 1375 ShouldNotReachHere(); 1376 } 1377 1378 1379 // ------------------------------------------------------------------ 1380 // CompileBroker::create_compile_task 1381 // 1382 // Create a CompileTask object representing the current request for 1383 // compilation. Add this task to the queue. 1384 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1385 int compile_id, 1386 methodHandle method, 1387 int osr_bci, 1388 int comp_level, 1389 methodHandle hot_method, 1390 int hot_count, 1391 const char* comment, 1392 bool blocking) { 1393 CompileTask* new_task = allocate_task(); 1394 new_task->initialize(compile_id, method, osr_bci, comp_level, 1395 hot_method, hot_count, comment, 1396 blocking); 1397 queue->add(new_task); 1398 return new_task; 1399 } 1400 1401 1402 // ------------------------------------------------------------------ 1403 // CompileBroker::allocate_task 1404 // 1405 // Allocate a CompileTask, from the free list if possible. 1406 CompileTask* CompileBroker::allocate_task() { 1407 MutexLocker locker(CompileTaskAlloc_lock); 1408 CompileTask* task = NULL; 1409 if (_task_free_list != NULL) { 1410 task = _task_free_list; 1411 _task_free_list = task->next(); 1412 task->set_next(NULL); 1413 } else { 1414 task = new CompileTask(); 1415 task->set_next(NULL); 1416 } 1417 return task; 1418 } 1419 1420 1421 // ------------------------------------------------------------------ 1422 // CompileBroker::free_task 1423 // 1424 // Add a task to the free list. 1425 void CompileBroker::free_task(CompileTask* task) { 1426 MutexLocker locker(CompileTaskAlloc_lock); 1427 task->free(); 1428 task->set_next(_task_free_list); 1429 _task_free_list = task; 1430 } 1431 1432 1433 // ------------------------------------------------------------------ 1434 // CompileBroker::wait_for_completion 1435 // 1436 // Wait for the given method CompileTask to complete. 1437 void CompileBroker::wait_for_completion(CompileTask* task) { 1438 if (CIPrintCompileQueue) { 1439 tty->print_cr("BLOCKING FOR COMPILE"); 1440 } 1441 1442 assert(task->is_blocking(), "can only wait on blocking task"); 1443 1444 JavaThread *thread = JavaThread::current(); 1445 thread->set_blocked_on_compilation(true); 1446 1447 methodHandle method(thread, 1448 (methodOop)JNIHandles::resolve(task->method_handle())); 1449 { 1450 MutexLocker waiter(task->lock(), thread); 1451 1452 while (!task->is_complete()) 1453 task->lock()->wait(); 1454 } 1455 // It is harmless to check this status without the lock, because 1456 // completion is a stable property (until the task object is recycled). 1457 assert(task->is_complete(), "Compilation should have completed"); 1458 assert(task->code_handle() == NULL, "must be reset"); 1459 1460 thread->set_blocked_on_compilation(false); 1461 1462 // By convention, the waiter is responsible for recycling a 1463 // blocking CompileTask. Since there is only one waiter ever 1464 // waiting on a CompileTask, we know that no one else will 1465 // be using this CompileTask; we can free it. 1466 free_task(task); 1467 } 1468 1469 // ------------------------------------------------------------------ 1470 // CompileBroker::compiler_thread_loop 1471 // 1472 // The main loop run by a CompilerThread. 1473 void CompileBroker::compiler_thread_loop() { 1474 CompilerThread* thread = CompilerThread::current(); 1475 CompileQueue* queue = thread->queue(); 1476 1477 // For the thread that initializes the ciObjectFactory 1478 // this resource mark holds all the shared objects 1479 ResourceMark rm; 1480 1481 // First thread to get here will initialize the compiler interface 1482 1483 if (!ciObjectFactory::is_initialized()) { 1484 ASSERT_IN_VM; 1485 MutexLocker only_one (CompileThread_lock, thread); 1486 if (!ciObjectFactory::is_initialized()) { 1487 ciObjectFactory::initialize(); 1488 } 1489 } 1490 1491 // Open a log. 1492 if (LogCompilation) { 1493 init_compiler_thread_log(); 1494 } 1495 CompileLog* log = thread->log(); 1496 if (log != NULL) { 1497 log->begin_elem("start_compile_thread thread='" UINTX_FORMAT "' process='%d'", 1498 os::current_thread_id(), 1499 os::current_process_id()); 1500 log->stamp(); 1501 log->end_elem(); 1502 } 1503 1504 while (true) { 1505 { 1506 // We need this HandleMark to avoid leaking VM handles. 1507 HandleMark hm(thread); 1508 1509 if (CodeCache::largest_free_block() < CodeCacheMinimumFreeSpace) { 1510 // the code cache is really full 1511 handle_full_code_cache(); 1512 } else if (UseCodeCacheFlushing && CodeCache::needs_flushing()) { 1513 // Attempt to start cleaning the code cache while there is still a little headroom 1514 NMethodSweeper::handle_full_code_cache(false); 1515 } 1516 1517 CompileTask* task = queue->get(); 1518 1519 // Give compiler threads an extra quanta. They tend to be bursty and 1520 // this helps the compiler to finish up the job. 1521 if( CompilerThreadHintNoPreempt ) 1522 os::hint_no_preempt(); 1523 1524 // trace per thread time and compile statistics 1525 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); 1526 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); 1527 1528 // Assign the task to the current thread. Mark this compilation 1529 // thread as active for the profiler. 1530 CompileTaskWrapper ctw(task); 1531 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1532 task->set_code_handle(&result_handle); 1533 methodHandle method(thread, 1534 (methodOop)JNIHandles::resolve(task->method_handle())); 1535 1536 // Never compile a method if breakpoints are present in it 1537 if (method()->number_of_breakpoints() == 0) { 1538 // Compile the method. 1539 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1540 #ifdef COMPILER1 1541 // Allow repeating compilations for the purpose of benchmarking 1542 // compile speed. This is not useful for customers. 1543 if (CompilationRepeat != 0) { 1544 int compile_count = CompilationRepeat; 1545 while (compile_count > 0) { 1546 invoke_compiler_on_method(task); 1547 nmethod* nm = method->code(); 1548 if (nm != NULL) { 1549 nm->make_zombie(); 1550 method->clear_code(); 1551 } 1552 compile_count--; 1553 } 1554 } 1555 #endif /* COMPILER1 */ 1556 invoke_compiler_on_method(task); 1557 } else { 1558 // After compilation is disabled, remove remaining methods from queue 1559 method->clear_queued_for_compilation(); 1560 } 1561 } 1562 } 1563 } 1564 } 1565 1566 1567 // ------------------------------------------------------------------ 1568 // CompileBroker::init_compiler_thread_log 1569 // 1570 // Set up state required by +LogCompilation. 1571 void CompileBroker::init_compiler_thread_log() { 1572 CompilerThread* thread = CompilerThread::current(); 1573 char fileBuf[4*K]; 1574 FILE* fp = NULL; 1575 char* file = NULL; 1576 intx thread_id = os::current_thread_id(); 1577 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1578 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1579 if (dir == NULL) { 1580 jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log", 1581 thread_id, os::current_process_id()); 1582 } else { 1583 jio_snprintf(fileBuf, sizeof(fileBuf), 1584 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1585 os::file_separator(), thread_id, os::current_process_id()); 1586 } 1587 fp = fopen(fileBuf, "at"); 1588 if (fp != NULL) { 1589 file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1); 1590 strcpy(file, fileBuf); 1591 break; 1592 } 1593 } 1594 if (fp == NULL) { 1595 warning("Cannot open log file: %s", fileBuf); 1596 } else { 1597 if (LogCompilation && Verbose) 1598 tty->print_cr("Opening compilation log %s", file); 1599 CompileLog* log = new(ResourceObj::C_HEAP) CompileLog(file, fp, thread_id); 1600 thread->init_log(log); 1601 1602 if (xtty != NULL) { 1603 ttyLocker ttyl; 1604 1605 // Record any per thread log files 1606 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file); 1607 } 1608 } 1609 } 1610 1611 // ------------------------------------------------------------------ 1612 // CompileBroker::set_should_block 1613 // 1614 // Set _should_block. 1615 // Call this from the VM, with Threads_lock held and a safepoint requested. 1616 void CompileBroker::set_should_block() { 1617 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1618 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1619 #ifndef PRODUCT 1620 if (PrintCompilation && (Verbose || WizardMode)) 1621 tty->print_cr("notifying compiler thread pool to block"); 1622 #endif 1623 _should_block = true; 1624 } 1625 1626 // ------------------------------------------------------------------ 1627 // CompileBroker::maybe_block 1628 // 1629 // Call this from the compiler at convenient points, to poll for _should_block. 1630 void CompileBroker::maybe_block() { 1631 if (_should_block) { 1632 #ifndef PRODUCT 1633 if (PrintCompilation && (Verbose || WizardMode)) 1634 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); 1635 #endif 1636 ThreadInVMfromNative tivfn(JavaThread::current()); 1637 } 1638 } 1639 1640 1641 // ------------------------------------------------------------------ 1642 // CompileBroker::invoke_compiler_on_method 1643 // 1644 // Compile a method. 1645 // 1646 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1647 if (PrintCompilation) { 1648 ResourceMark rm; 1649 task->print_line(); 1650 } 1651 elapsedTimer time; 1652 1653 CompilerThread* thread = CompilerThread::current(); 1654 ResourceMark rm(thread); 1655 1656 // Common flags. 1657 uint compile_id = task->compile_id(); 1658 int osr_bci = task->osr_bci(); 1659 bool is_osr = (osr_bci != standard_entry_bci); 1660 bool should_log = (thread->log() != NULL); 1661 bool should_break = false; 1662 { 1663 // create the handle inside it's own block so it can't 1664 // accidentally be referenced once the thread transitions to 1665 // native. The NoHandleMark before the transition should catch 1666 // any cases where this occurs in the future. 1667 methodHandle method(thread, 1668 (methodOop)JNIHandles::resolve(task->method_handle())); 1669 should_break = check_break_at(method, compile_id, is_osr); 1670 if (should_log && !CompilerOracle::should_log(method)) { 1671 should_log = false; 1672 } 1673 assert(!method->is_native(), "no longer compile natives"); 1674 1675 // Save information about this method in case of failure. 1676 set_last_compile(thread, method, is_osr, task->comp_level()); 1677 1678 DTRACE_METHOD_COMPILE_BEGIN_PROBE(compiler(task->comp_level()), method); 1679 } 1680 1681 // Allocate a new set of JNI handles. 1682 push_jni_handle_block(); 1683 jobject target_handle = JNIHandles::make_local(thread, JNIHandles::resolve(task->method_handle())); 1684 int compilable = ciEnv::MethodCompilable; 1685 { 1686 int system_dictionary_modification_counter; 1687 { 1688 MutexLocker locker(Compile_lock, thread); 1689 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1690 } 1691 1692 NoHandleMark nhm; 1693 ThreadToNativeFromVM ttn(thread); 1694 1695 ciEnv ci_env(task, system_dictionary_modification_counter); 1696 if (should_break) { 1697 ci_env.set_break_at_compile(true); 1698 } 1699 if (should_log) { 1700 ci_env.set_log(thread->log()); 1701 } 1702 assert(thread->env() == &ci_env, "set by ci_env"); 1703 // The thread-env() field is cleared in ~CompileTaskWrapper. 1704 1705 // Cache Jvmti state 1706 ci_env.cache_jvmti_state(); 1707 1708 // Cache DTrace flags 1709 ci_env.cache_dtrace_flags(); 1710 1711 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1712 1713 TraceTime t1("compilation", &time); 1714 1715 compiler(task->comp_level())->compile_method(&ci_env, target, osr_bci); 1716 1717 if (!ci_env.failing() && task->code() == NULL) { 1718 //assert(false, "compiler should always document failure"); 1719 // The compiler elected, without comment, not to register a result. 1720 // Do not attempt further compilations of this method. 1721 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1722 } 1723 1724 if (ci_env.failing()) { 1725 // Copy this bit to the enclosing block: 1726 compilable = ci_env.compilable(); 1727 if (PrintCompilation) { 1728 const char* reason = ci_env.failure_reason(); 1729 if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1730 tty->print_cr("%4d COMPILE SKIPPED: %s (retry at different tier)", compile_id, reason); 1731 } else if (compilable == ciEnv::MethodCompilable_never) { 1732 tty->print_cr("%4d COMPILE SKIPPED: %s (not retryable)", compile_id, reason); 1733 } else if (compilable == ciEnv::MethodCompilable) { 1734 tty->print_cr("%4d COMPILE SKIPPED: %s", compile_id, reason); 1735 } 1736 } 1737 } else { 1738 task->mark_success(); 1739 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); 1740 } 1741 } 1742 pop_jni_handle_block(); 1743 1744 methodHandle method(thread, 1745 (methodOop)JNIHandles::resolve(task->method_handle())); 1746 1747 DTRACE_METHOD_COMPILE_END_PROBE(compiler(task->comp_level()), method, task->is_success()); 1748 1749 collect_statistics(thread, time, task); 1750 1751 if (PrintCompilation && PrintCompilation2) { 1752 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 1753 tty->print("%4d ", compile_id); // print compilation number 1754 tty->print("%s ", (is_osr ? "%" : " ")); 1755 int code_size = (task->code() == NULL) ? 0 : task->code()->total_size(); 1756 tty->print_cr("size: %d time: %d inlined: %d bytes", code_size, (int)time.milliseconds(), task->num_inlined_bytecodes()); 1757 } 1758 1759 if (compilable == ciEnv::MethodCompilable_never) { 1760 if (is_osr) { 1761 method->set_not_osr_compilable(); 1762 } else { 1763 method->set_not_compilable_quietly(); 1764 } 1765 } else if (compilable == ciEnv::MethodCompilable_not_at_tier) { 1766 method->set_not_compilable_quietly(task->comp_level()); 1767 } 1768 1769 // Note that the queued_for_compilation bits are cleared without 1770 // protection of a mutex. [They were set by the requester thread, 1771 // when adding the task to the complie queue -- at which time the 1772 // compile queue lock was held. Subsequently, we acquired the compile 1773 // queue lock to get this task off the compile queue; thus (to belabour 1774 // the point somewhat) our clearing of the bits must be occurring 1775 // only after the setting of the bits. See also 14012000 above. 1776 method->clear_queued_for_compilation(); 1777 1778 #ifdef ASSERT 1779 if (CollectedHeap::fired_fake_oom()) { 1780 // The current compile received a fake OOM during compilation so 1781 // go ahead and exit the VM since the test apparently succeeded 1782 tty->print_cr("*** Shutting down VM after successful fake OOM"); 1783 vm_exit(0); 1784 } 1785 #endif 1786 } 1787 1788 // ------------------------------------------------------------------ 1789 // CompileBroker::handle_full_code_cache 1790 // 1791 // The CodeCache is full. Print out warning and disable compilation or 1792 // try code cache cleaning so compilation can continue later. 1793 void CompileBroker::handle_full_code_cache() { 1794 UseInterpreter = true; 1795 if (UseCompiler || AlwaysCompileLoopMethods ) { 1796 if (xtty != NULL) { 1797 stringStream s; 1798 // Dump code cache state into a buffer before locking the tty, 1799 // because log_state() will use locks causing lock conflicts. 1800 CodeCache::log_state(&s); 1801 // Lock to prevent tearing 1802 ttyLocker ttyl; 1803 xtty->begin_elem("code_cache_full"); 1804 xtty->print(s.as_string()); 1805 xtty->stamp(); 1806 xtty->end_elem(); 1807 } 1808 warning("CodeCache is full. Compiler has been disabled."); 1809 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); 1810 CodeCache::print_bounds(tty); 1811 #ifndef PRODUCT 1812 if (CompileTheWorld || ExitOnFullCodeCache) { 1813 before_exit(JavaThread::current()); 1814 exit_globals(); // will delete tty 1815 vm_direct_exit(CompileTheWorld ? 0 : 1); 1816 } 1817 #endif 1818 if (UseCodeCacheFlushing) { 1819 NMethodSweeper::handle_full_code_cache(true); 1820 } else { 1821 UseCompiler = false; 1822 AlwaysCompileLoopMethods = false; 1823 } 1824 } 1825 } 1826 1827 // ------------------------------------------------------------------ 1828 // CompileBroker::set_last_compile 1829 // 1830 // Record this compilation for debugging purposes. 1831 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { 1832 ResourceMark rm; 1833 char* method_name = method->name()->as_C_string(); 1834 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 1835 char current_method[CompilerCounters::cmname_buffer_length]; 1836 size_t maxLen = CompilerCounters::cmname_buffer_length; 1837 1838 if (UsePerfData) { 1839 const char* class_name = method->method_holder()->klass_part()->name()->as_C_string(); 1840 1841 size_t s1len = strlen(class_name); 1842 size_t s2len = strlen(method_name); 1843 1844 // check if we need to truncate the string 1845 if (s1len + s2len + 2 > maxLen) { 1846 1847 // the strategy is to lop off the leading characters of the 1848 // class name and the trailing characters of the method name. 1849 1850 if (s2len + 2 > maxLen) { 1851 // lop of the entire class name string, let snprintf handle 1852 // truncation of the method name. 1853 class_name += s1len; // null string 1854 } 1855 else { 1856 // lop off the extra characters from the front of the class name 1857 class_name += ((s1len + s2len + 2) - maxLen); 1858 } 1859 } 1860 1861 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 1862 } 1863 1864 if (CICountOSR && is_osr) { 1865 _last_compile_type = osr_compile; 1866 } else { 1867 _last_compile_type = normal_compile; 1868 } 1869 _last_compile_level = comp_level; 1870 1871 if (UsePerfData) { 1872 CompilerCounters* counters = thread->counters(); 1873 counters->set_current_method(current_method); 1874 counters->set_compile_type((jlong)_last_compile_type); 1875 } 1876 } 1877 1878 1879 // ------------------------------------------------------------------ 1880 // CompileBroker::push_jni_handle_block 1881 // 1882 // Push on a new block of JNI handles. 1883 void CompileBroker::push_jni_handle_block() { 1884 JavaThread* thread = JavaThread::current(); 1885 1886 // Allocate a new block for JNI handles. 1887 // Inlined code from jni_PushLocalFrame() 1888 JNIHandleBlock* java_handles = thread->active_handles(); 1889 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 1890 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 1891 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 1892 thread->set_active_handles(compile_handles); 1893 } 1894 1895 1896 // ------------------------------------------------------------------ 1897 // CompileBroker::pop_jni_handle_block 1898 // 1899 // Pop off the current block of JNI handles. 1900 void CompileBroker::pop_jni_handle_block() { 1901 JavaThread* thread = JavaThread::current(); 1902 1903 // Release our JNI handle block 1904 JNIHandleBlock* compile_handles = thread->active_handles(); 1905 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 1906 thread->set_active_handles(java_handles); 1907 compile_handles->set_pop_frame_link(NULL); 1908 JNIHandleBlock::release_block(compile_handles, thread); // may block 1909 } 1910 1911 1912 // ------------------------------------------------------------------ 1913 // CompileBroker::check_break_at 1914 // 1915 // Should the compilation break at the current compilation. 1916 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { 1917 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { 1918 return true; 1919 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling 1920 return true; 1921 } else { 1922 return (compile_id == CIBreakAt); 1923 } 1924 } 1925 1926 // ------------------------------------------------------------------ 1927 // CompileBroker::collect_statistics 1928 // 1929 // Collect statistics about the compilation. 1930 1931 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 1932 bool success = task->is_success(); 1933 methodHandle method (thread, (methodOop)JNIHandles::resolve(task->method_handle())); 1934 uint compile_id = task->compile_id(); 1935 bool is_osr = (task->osr_bci() != standard_entry_bci); 1936 nmethod* code = task->code(); 1937 CompilerCounters* counters = thread->counters(); 1938 1939 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 1940 MutexLocker locker(CompileStatistics_lock); 1941 1942 // _perf variables are production performance counters which are 1943 // updated regardless of the setting of the CITime and CITimeEach flags 1944 // 1945 if (!success) { 1946 _total_bailout_count++; 1947 if (UsePerfData) { 1948 _perf_last_failed_method->set_value(counters->current_method()); 1949 _perf_last_failed_type->set_value(counters->compile_type()); 1950 _perf_total_bailout_count->inc(); 1951 } 1952 } else if (code == NULL) { 1953 if (UsePerfData) { 1954 _perf_last_invalidated_method->set_value(counters->current_method()); 1955 _perf_last_invalidated_type->set_value(counters->compile_type()); 1956 _perf_total_invalidated_count->inc(); 1957 } 1958 _total_invalidated_count++; 1959 } else { 1960 // Compilation succeeded 1961 1962 // update compilation ticks - used by the implementation of 1963 // java.lang.management.CompilationMBean 1964 _perf_total_compilation->inc(time.ticks()); 1965 1966 if (CITime) { 1967 _t_total_compilation.add(time); 1968 if (is_osr) { 1969 _t_osr_compilation.add(time); 1970 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1971 } else { 1972 _t_standard_compilation.add(time); 1973 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 1974 } 1975 } 1976 1977 if (UsePerfData) { 1978 // save the name of the last method compiled 1979 _perf_last_method->set_value(counters->current_method()); 1980 _perf_last_compile_type->set_value(counters->compile_type()); 1981 _perf_last_compile_size->set_value(method->code_size() + 1982 task->num_inlined_bytecodes()); 1983 if (is_osr) { 1984 _perf_osr_compilation->inc(time.ticks()); 1985 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1986 } else { 1987 _perf_standard_compilation->inc(time.ticks()); 1988 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 1989 } 1990 } 1991 1992 if (CITimeEach) { 1993 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 1994 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 1995 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 1996 } 1997 1998 // Collect counts of successful compilations 1999 _sum_nmethod_size += code->total_size(); 2000 _sum_nmethod_code_size += code->insts_size(); 2001 _total_compile_count++; 2002 2003 if (UsePerfData) { 2004 _perf_sum_nmethod_size->inc( code->total_size()); 2005 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2006 _perf_total_compile_count->inc(); 2007 } 2008 2009 if (is_osr) { 2010 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2011 _total_osr_compile_count++; 2012 } else { 2013 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2014 _total_standard_compile_count++; 2015 } 2016 } 2017 // set the current method for the thread to null 2018 if (UsePerfData) counters->set_current_method(""); 2019 } 2020 2021 2022 2023 void CompileBroker::print_times() { 2024 tty->cr(); 2025 tty->print_cr("Accumulated compiler times (for compiled methods only)"); 2026 tty->print_cr("------------------------------------------------"); 2027 //0000000000111111111122222222223333333333444444444455555555556666666666 2028 //0123456789012345678901234567890123456789012345678901234567890123456789 2029 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); 2030 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", 2031 CompileBroker::_t_standard_compilation.seconds(), 2032 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); 2033 tty->print_cr(" On stack replacement : %6.3f s, Average : %2.3f", CompileBroker::_t_osr_compilation.seconds(), CompileBroker::_t_osr_compilation.seconds() / CompileBroker::_total_osr_compile_count); 2034 2035 if (compiler(CompLevel_simple) != NULL) { 2036 compiler(CompLevel_simple)->print_timers(); 2037 } 2038 if (compiler(CompLevel_full_optimization) != NULL) { 2039 compiler(CompLevel_full_optimization)->print_timers(); 2040 } 2041 tty->cr(); 2042 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; 2043 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); 2044 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); 2045 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); 2046 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); 2047 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); 2048 tty->cr(); 2049 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); 2050 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); 2051 } 2052 2053 2054 // Debugging output for failure 2055 void CompileBroker::print_last_compile() { 2056 if ( _last_compile_level != CompLevel_none && 2057 compiler(_last_compile_level) != NULL && 2058 _last_method_compiled != NULL && 2059 _last_compile_type != no_compile) { 2060 if (_last_compile_type == osr_compile) { 2061 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2062 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2063 } else { 2064 tty->print_cr("Last parse: %d+++(%d) %s", 2065 _compilation_id, _last_compile_level, _last_method_compiled); 2066 } 2067 } 2068 } 2069 2070 2071 void CompileBroker::print_compiler_threads_on(outputStream* st) { 2072 #ifndef PRODUCT 2073 st->print_cr("Compiler thread printing unimplemented."); 2074 st->cr(); 2075 #endif 2076 }