1 /* 2 * Copyright (c) 1999, 2013, 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/methodData.hpp" 35 #include "oops/method.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 "trace/tracing.hpp" 47 #include "utilities/dtrace.hpp" 48 #include "utilities/events.hpp" 49 #ifdef COMPILER1 50 #include "c1/c1_Compiler.hpp" 51 #endif 52 #ifdef COMPILER2 53 #include "opto/c2compiler.hpp" 54 #endif 55 #ifdef SHARK 56 #include "shark/sharkCompiler.hpp" 57 #endif 58 59 #ifdef DTRACE_ENABLED 60 61 // Only bother with this argument setup if dtrace is available 62 63 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 64 { \ 65 Symbol* klass_name = (method)->klass_name(); \ 66 Symbol* name = (method)->name(); \ 67 Symbol* signature = (method)->signature(); \ 68 HOTSPOT_METHOD_COMPILE_BEGIN( \ 69 (char *) comp_name, strlen(comp_name), \ 70 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 71 (char *) name->bytes(), name->utf8_length(), \ 72 (char *) signature->bytes(), signature->utf8_length()); \ 73 } 74 75 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 76 { \ 77 Symbol* klass_name = (method)->klass_name(); \ 78 Symbol* name = (method)->name(); \ 79 Symbol* signature = (method)->signature(); \ 80 HOTSPOT_METHOD_COMPILE_END( \ 81 (char *) comp_name, strlen(comp_name), \ 82 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 83 (char *) name->bytes(), name->utf8_length(), \ 84 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 85 } 86 87 #else // ndef DTRACE_ENABLED 88 89 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 90 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 91 92 #endif // ndef DTRACE_ENABLED 93 94 bool CompileBroker::_initialized = false; 95 volatile bool CompileBroker::_should_block = false; 96 volatile jint CompileBroker::_print_compilation_warning = 0; 97 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 98 99 // The installed compiler(s) 100 AbstractCompiler* CompileBroker::_compilers[2]; 101 102 // These counters are used to assign an unique ID to each compilation. 103 volatile jint CompileBroker::_compilation_id = 0; 104 volatile jint CompileBroker::_osr_compilation_id = 0; 105 106 // Debugging information 107 int CompileBroker::_last_compile_type = no_compile; 108 int CompileBroker::_last_compile_level = CompLevel_none; 109 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 110 111 // Performance counters 112 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 113 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 114 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 115 116 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 117 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 118 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 119 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 120 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 121 122 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 123 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 124 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 125 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 126 127 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 128 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 129 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 130 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 131 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 132 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 133 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 134 135 // Timers and counters for generating statistics 136 elapsedTimer CompileBroker::_t_total_compilation; 137 elapsedTimer CompileBroker::_t_osr_compilation; 138 elapsedTimer CompileBroker::_t_standard_compilation; 139 140 int CompileBroker::_total_bailout_count = 0; 141 int CompileBroker::_total_invalidated_count = 0; 142 int CompileBroker::_total_compile_count = 0; 143 int CompileBroker::_total_osr_compile_count = 0; 144 int CompileBroker::_total_standard_compile_count = 0; 145 146 int CompileBroker::_sum_osr_bytes_compiled = 0; 147 int CompileBroker::_sum_standard_bytes_compiled = 0; 148 int CompileBroker::_sum_nmethod_size = 0; 149 int CompileBroker::_sum_nmethod_code_size = 0; 150 151 long CompileBroker::_peak_compilation_time = 0; 152 153 CompileQueue* CompileBroker::_c2_compile_queue = NULL; 154 CompileQueue* CompileBroker::_c1_compile_queue = NULL; 155 156 GrowableArray<CompilerThread*>* CompileBroker::_compiler_threads = NULL; 157 158 159 class CompilationLog : public StringEventLog { 160 public: 161 CompilationLog() : StringEventLog("Compilation events") { 162 } 163 164 void log_compile(JavaThread* thread, CompileTask* task) { 165 StringLogMessage lm; 166 stringStream sstr = lm.stream(); 167 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 168 task->print_compilation(&sstr, NULL, true); 169 log(thread, "%s", (const char*)lm); 170 } 171 172 void log_nmethod(JavaThread* thread, nmethod* nm) { 173 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]", 174 nm->compile_id(), nm->is_osr_method() ? "%" : "", 175 nm, nm->code_begin(), nm->code_end()); 176 } 177 178 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 179 StringLogMessage lm; 180 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 181 if (retry_message != NULL) { 182 lm.append(" (%s)", retry_message); 183 } 184 lm.print("\n"); 185 log(thread, "%s", (const char*)lm); 186 } 187 }; 188 189 static CompilationLog* _compilation_log = NULL; 190 191 void compileBroker_init() { 192 if (LogEvents) { 193 _compilation_log = new CompilationLog(); 194 } 195 } 196 197 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 198 CompilerThread* thread = CompilerThread::current(); 199 thread->set_task(task); 200 CompileLog* log = thread->log(); 201 if (log != NULL) task->log_task_start(log); 202 } 203 204 CompileTaskWrapper::~CompileTaskWrapper() { 205 CompilerThread* thread = CompilerThread::current(); 206 CompileTask* task = thread->task(); 207 CompileLog* log = thread->log(); 208 if (log != NULL) task->log_task_done(log); 209 thread->set_task(NULL); 210 task->set_code_handle(NULL); 211 thread->set_env(NULL); 212 if (task->is_blocking()) { 213 MutexLocker notifier(task->lock(), thread); 214 task->mark_complete(); 215 // Notify the waiting thread that the compilation has completed. 216 task->lock()->notify_all(); 217 } else { 218 task->mark_complete(); 219 220 // By convention, the compiling thread is responsible for 221 // recycling a non-blocking CompileTask. 222 CompileTask::free(task); 223 } 224 } 225 226 227 CompileTask* CompileTask::_task_free_list = NULL; 228 #ifdef ASSERT 229 int CompileTask::_num_allocated_tasks = 0; 230 #endif 231 /** 232 * Allocate a CompileTask, from the free list if possible. 233 */ 234 CompileTask* CompileTask::allocate() { 235 MutexLocker locker(CompileTaskAlloc_lock); 236 CompileTask* task = NULL; 237 238 if (_task_free_list != NULL) { 239 task = _task_free_list; 240 _task_free_list = task->next(); 241 task->set_next(NULL); 242 } else { 243 task = new CompileTask(); 244 DEBUG_ONLY(_num_allocated_tasks++;) 245 assert (_num_allocated_tasks < 10000, "Leaking compilation tasks?"); 246 task->set_next(NULL); 247 task->set_is_free(true); 248 } 249 assert(task->is_free(), "Task must be free."); 250 task->set_is_free(false); 251 return task; 252 } 253 254 255 /** 256 * Add a task to the free list. 257 */ 258 void CompileTask::free(CompileTask* task) { 259 MutexLocker locker(CompileTaskAlloc_lock); 260 if (!task->is_free()) { 261 task->set_code(NULL); 262 assert(!task->lock()->is_locked(), "Should not be locked when freed"); 263 JNIHandles::destroy_global(task->_method_holder); 264 JNIHandles::destroy_global(task->_hot_method_holder); 265 266 task->set_is_free(true); 267 task->set_next(_task_free_list); 268 _task_free_list = task; 269 } 270 } 271 272 void CompileTask::initialize(int compile_id, 273 methodHandle method, 274 int osr_bci, 275 int comp_level, 276 methodHandle hot_method, 277 int hot_count, 278 const char* comment, 279 bool is_blocking) { 280 assert(!_lock->is_locked(), "bad locking"); 281 282 _compile_id = compile_id; 283 _method = method(); 284 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder()); 285 _osr_bci = osr_bci; 286 _is_blocking = is_blocking; 287 _comp_level = comp_level; 288 _num_inlined_bytecodes = 0; 289 290 _is_complete = false; 291 _is_success = false; 292 _code_handle = NULL; 293 294 _hot_method = NULL; 295 _hot_method_holder = NULL; 296 _hot_count = hot_count; 297 _time_queued = 0; // tidy 298 _comment = comment; 299 300 if (LogCompilation) { 301 _time_queued = os::elapsed_counter(); 302 if (hot_method.not_null()) { 303 if (hot_method == method) { 304 _hot_method = _method; 305 } else { 306 _hot_method = hot_method(); 307 // only add loader or mirror if different from _method_holder 308 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder()); 309 } 310 } 311 } 312 313 _next = NULL; 314 } 315 316 // ------------------------------------------------------------------ 317 // CompileTask::code/set_code 318 nmethod* CompileTask::code() const { 319 if (_code_handle == NULL) return NULL; 320 return _code_handle->code(); 321 } 322 void CompileTask::set_code(nmethod* nm) { 323 if (_code_handle == NULL && nm == NULL) return; 324 guarantee(_code_handle != NULL, ""); 325 _code_handle->set_code(nm); 326 if (nm == NULL) _code_handle = NULL; // drop the handle also 327 } 328 329 330 void CompileTask::mark_on_stack() { 331 // Mark these methods as something redefine classes cannot remove. 332 _method->set_on_stack(true); 333 if (_hot_method != NULL) { 334 _hot_method->set_on_stack(true); 335 } 336 } 337 338 // ------------------------------------------------------------------ 339 // CompileTask::print 340 void CompileTask::print() { 341 tty->print("<CompileTask compile_id=%d ", _compile_id); 342 tty->print("method="); 343 _method->print_name(tty); 344 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", 345 _osr_bci, bool_to_str(_is_blocking), 346 bool_to_str(_is_complete), bool_to_str(_is_success)); 347 } 348 349 350 // ------------------------------------------------------------------ 351 // CompileTask::print_line_on_error 352 // 353 // This function is called by fatal error handler when the thread 354 // causing troubles is a compiler thread. 355 // 356 // Do not grab any lock, do not allocate memory. 357 // 358 // Otherwise it's the same as CompileTask::print_line() 359 // 360 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { 361 // print compiler name 362 st->print("%s:", CompileBroker::compiler_name(comp_level())); 363 print_compilation(st); 364 } 365 366 // ------------------------------------------------------------------ 367 // CompileTask::print_line 368 void CompileTask::print_line() { 369 ttyLocker ttyl; // keep the following output all in one block 370 // print compiler name if requested 371 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level())); 372 print_compilation(); 373 } 374 375 376 // ------------------------------------------------------------------ 377 // CompileTask::print_compilation_impl 378 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level, 379 bool is_osr_method, int osr_bci, bool is_blocking, 380 const char* msg, bool short_form) { 381 if (!short_form) { 382 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp 383 } 384 st->print("%4d ", compile_id); // print compilation number 385 386 // For unloaded methods the transition to zombie occurs after the 387 // method is cleared so it's impossible to report accurate 388 // information for that case. 389 bool is_synchronized = false; 390 bool has_exception_handler = false; 391 bool is_native = false; 392 if (method != NULL) { 393 is_synchronized = method->is_synchronized(); 394 has_exception_handler = method->has_exception_handler(); 395 is_native = method->is_native(); 396 } 397 // method attributes 398 const char compile_type = is_osr_method ? '%' : ' '; 399 const char sync_char = is_synchronized ? 's' : ' '; 400 const char exception_char = has_exception_handler ? '!' : ' '; 401 const char blocking_char = is_blocking ? 'b' : ' '; 402 const char native_char = is_native ? 'n' : ' '; 403 404 // print method attributes 405 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); 406 407 if (TieredCompilation) { 408 if (comp_level != -1) st->print("%d ", comp_level); 409 else st->print("- "); 410 } 411 st->print(" "); // more indent 412 413 if (method == NULL) { 414 st->print("(method)"); 415 } else { 416 method->print_short_name(st); 417 if (is_osr_method) { 418 st->print(" @ %d", osr_bci); 419 } 420 if (method->is_native()) 421 st->print(" (native)"); 422 else 423 st->print(" (%d bytes)", method->code_size()); 424 } 425 426 if (msg != NULL) { 427 st->print(" %s", msg); 428 } 429 if (!short_form) { 430 st->cr(); 431 } 432 } 433 434 // ------------------------------------------------------------------ 435 // CompileTask::print_inlining 436 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { 437 // 1234567 438 st->print(" "); // print timestamp 439 // 1234 440 st->print(" "); // print compilation number 441 442 // method attributes 443 if (method->is_loaded()) { 444 const char sync_char = method->is_synchronized() ? 's' : ' '; 445 const char exception_char = method->has_exception_handlers() ? '!' : ' '; 446 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; 447 448 // print method attributes 449 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); 450 } else { 451 // %s!bn 452 st->print(" "); // print method attributes 453 } 454 455 if (TieredCompilation) { 456 st->print(" "); 457 } 458 st->print(" "); // more indent 459 st->print(" "); // initial inlining indent 460 461 for (int i = 0; i < inline_level; i++) st->print(" "); 462 463 st->print("@ %d ", bci); // print bci 464 method->print_short_name(st); 465 if (method->is_loaded()) 466 st->print(" (%d bytes)", method->code_size()); 467 else 468 st->print(" (not loaded)"); 469 470 if (msg != NULL) { 471 st->print(" %s", msg); 472 } 473 st->cr(); 474 } 475 476 // ------------------------------------------------------------------ 477 // CompileTask::print_inline_indent 478 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { 479 // 1234567 480 st->print(" "); // print timestamp 481 // 1234 482 st->print(" "); // print compilation number 483 // %s!bn 484 st->print(" "); // print method attributes 485 if (TieredCompilation) { 486 st->print(" "); 487 } 488 st->print(" "); // more indent 489 st->print(" "); // initial inlining indent 490 for (int i = 0; i < inline_level; i++) st->print(" "); 491 } 492 493 // ------------------------------------------------------------------ 494 // CompileTask::print_compilation 495 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) { 496 bool is_osr_method = osr_bci() != InvocationEntryBci; 497 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form); 498 } 499 500 // ------------------------------------------------------------------ 501 // CompileTask::log_task 502 void CompileTask::log_task(xmlStream* log) { 503 Thread* thread = Thread::current(); 504 methodHandle method(thread, this->method()); 505 ResourceMark rm(thread); 506 507 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> 508 log->print(" compile_id='%d'", _compile_id); 509 if (_osr_bci != CompileBroker::standard_entry_bci) { 510 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind 511 } // else compile_kind='c2c' 512 if (!method.is_null()) log->method(method); 513 if (_osr_bci != CompileBroker::standard_entry_bci) { 514 log->print(" osr_bci='%d'", _osr_bci); 515 } 516 if (_comp_level != CompLevel_highest_tier) { 517 log->print(" level='%d'", _comp_level); 518 } 519 if (_is_blocking) { 520 log->print(" blocking='1'"); 521 } 522 log->stamp(); 523 } 524 525 526 // ------------------------------------------------------------------ 527 // CompileTask::log_task_queued 528 void CompileTask::log_task_queued() { 529 Thread* thread = Thread::current(); 530 ttyLocker ttyl; 531 ResourceMark rm(thread); 532 533 xtty->begin_elem("task_queued"); 534 log_task(xtty); 535 if (_comment != NULL) { 536 xtty->print(" comment='%s'", _comment); 537 } 538 if (_hot_method != NULL) { 539 methodHandle hot(thread, _hot_method); 540 methodHandle method(thread, _method); 541 if (hot() != method()) { 542 xtty->method(hot); 543 } 544 } 545 if (_hot_count != 0) { 546 xtty->print(" hot_count='%d'", _hot_count); 547 } 548 xtty->end_elem(); 549 } 550 551 552 // ------------------------------------------------------------------ 553 // CompileTask::log_task_start 554 void CompileTask::log_task_start(CompileLog* log) { 555 log->begin_head("task"); 556 log_task(log); 557 log->end_head(); 558 } 559 560 561 // ------------------------------------------------------------------ 562 // CompileTask::log_task_done 563 void CompileTask::log_task_done(CompileLog* log) { 564 Thread* thread = Thread::current(); 565 methodHandle method(thread, this->method()); 566 ResourceMark rm(thread); 567 568 // <task_done ... stamp='1.234'> </task> 569 nmethod* nm = code(); 570 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", 571 _is_success, nm == NULL ? 0 : nm->content_size(), 572 method->invocation_count()); 573 int bec = method->backedge_count(); 574 if (bec != 0) log->print(" backedge_count='%d'", bec); 575 // Note: "_is_complete" is about to be set, but is not. 576 if (_num_inlined_bytecodes != 0) { 577 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); 578 } 579 log->stamp(); 580 log->end_elem(); 581 log->tail("task"); 582 log->clear_identities(); // next task will have different CI 583 if (log->unflushed_count() > 2000) { 584 log->flush(); 585 } 586 log->mark_file_end(); 587 } 588 589 590 591 /** 592 * Add a CompileTask to a CompileQueue 593 */ 594 void CompileQueue::add(CompileTask* task) { 595 assert(lock()->owned_by_self(), "must own lock"); 596 assert(!CompileBroker::is_compilation_disabled_forever(), "Do not add task if compilation is turned off forever"); 597 598 task->set_next(NULL); 599 task->set_prev(NULL); 600 601 if (_last == NULL) { 602 // The compile queue is empty. 603 assert(_first == NULL, "queue is empty"); 604 _first = task; 605 _last = task; 606 } else { 607 // Append the task to the queue. 608 assert(_last->next() == NULL, "not last"); 609 _last->set_next(task); 610 task->set_prev(_last); 611 _last = task; 612 } 613 ++_size; 614 615 // Mark the method as being in the compile queue. 616 task->method()->set_queued_for_compilation(); 617 618 NOT_PRODUCT(print();) 619 620 if (LogCompilation && xtty != NULL) { 621 task->log_task_queued(); 622 } 623 624 // Notify CompilerThreads that a task is available. 625 lock()->notify_all(); 626 } 627 628 void CompileQueue::free_all() { 629 MutexLocker mu(lock()); 630 if (_first != NULL) { 631 for (CompileTask* task = _first; task != NULL; task = task->next()) { 632 // Wake up thread that blocks on the compile task. 633 task->lock()->notify(); 634 // Puts task back on the freelist. 635 CompileTask::free(task); 636 } 637 _first = NULL; 638 } 639 // Wake up all threads that block on the queue. 640 lock()->notify_all(); 641 } 642 643 // ------------------------------------------------------------------ 644 // CompileQueue::get 645 // 646 // Get the next CompileTask from a CompileQueue 647 CompileTask* CompileQueue::get() { 648 NMethodSweeper::possibly_sweep(); 649 650 MutexLocker locker(lock()); 651 // If _first is NULL we have no more compile jobs. There are two reasons for 652 // having no compile jobs: First, we compiled everything we wanted. Second, 653 // we ran out of code cache so compilation has been disabled. In the latter 654 // case we perform code cache sweeps to free memory such that we can re-enable 655 // compilation. 656 while (_first == NULL) { 657 // Exit loop if compilation is disabled forever 658 if (CompileBroker::is_compilation_disabled_forever()) { 659 return NULL; 660 } 661 662 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) { 663 // Wait a certain amount of time to possibly do another sweep. 664 // We must wait until stack scanning has happened so that we can 665 // transition a method's state from 'not_entrant' to 'zombie'. 666 long wait_time = NmethodSweepCheckInterval * 1000; 667 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) { 668 // Only one thread at a time can do sweeping. Scale the 669 // wait time according to the number of compiler threads. 670 // As a result, the next sweep is likely to happen every 100ms 671 // with an arbitrary number of threads that do sweeping. 672 wait_time = 100 * CICompilerCount; 673 } 674 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time); 675 if (timeout) { 676 MutexUnlocker ul(lock()); 677 NMethodSweeper::possibly_sweep(); 678 } 679 } else { 680 // If there are no compilation tasks and we can compile new jobs 681 // (i.e., there is enough free space in the code cache) there is 682 // no need to invoke the sweeper. As a result, the hotness of methods 683 // remains unchanged. This behavior is desired, since we want to keep 684 // the stable state, i.e., we do not want to evict methods from the 685 // code cache if it is unnecessary. 686 // We need a timed wait here, since compiler threads can exit if compilation 687 // is disabled forever. We use 5 seconds wait time; the exiting of compiler threads 688 // is not critical and we do not want idle compiler threads to wake up too often. 689 lock()->wait(!Mutex::_no_safepoint_check_flag, 5*1000); 690 } 691 } 692 693 if (CompileBroker::is_compilation_disabled_forever()) { 694 return NULL; 695 } 696 697 CompileTask* task = CompilationPolicy::policy()->select_task(this); 698 remove(task); 699 return task; 700 } 701 702 void CompileQueue::remove(CompileTask* task) 703 { 704 assert(lock()->owned_by_self(), "must own lock"); 705 if (task->prev() != NULL) { 706 task->prev()->set_next(task->next()); 707 } else { 708 // max is the first element 709 assert(task == _first, "Sanity"); 710 _first = task->next(); 711 } 712 713 if (task->next() != NULL) { 714 task->next()->set_prev(task->prev()); 715 } else { 716 // max is the last element 717 assert(task == _last, "Sanity"); 718 _last = task->prev(); 719 } 720 --_size; 721 } 722 723 // methods in the compile queue need to be marked as used on the stack 724 // so that they don't get reclaimed by Redefine Classes 725 void CompileQueue::mark_on_stack() { 726 CompileTask* task = _first; 727 while (task != NULL) { 728 task->mark_on_stack(); 729 task = task->next(); 730 } 731 } 732 733 #ifndef PRODUCT 734 /** 735 * Print entire compilation queue. 736 */ 737 void CompileQueue::print() { 738 if (CIPrintCompileQueue) { 739 ttyLocker ttyl; 740 tty->print_cr("Contents of %s", name()); 741 tty->print_cr("----------------------"); 742 CompileTask* task = _first; 743 while (task != NULL) { 744 task->print_line(); 745 task = task->next(); 746 } 747 tty->print_cr("----------------------"); 748 } 749 } 750 #endif // PRODUCT 751 752 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { 753 754 _current_method[0] = '\0'; 755 _compile_type = CompileBroker::no_compile; 756 757 if (UsePerfData) { 758 ResourceMark rm; 759 760 // create the thread instance name space string - don't create an 761 // instance subspace if instance is -1 - keeps the adapterThread 762 // counters from having a ".0" namespace. 763 const char* thread_i = (instance == -1) ? thread_name : 764 PerfDataManager::name_space(thread_name, instance); 765 766 767 char* name = PerfDataManager::counter_name(thread_i, "method"); 768 _perf_current_method = 769 PerfDataManager::create_string_variable(SUN_CI, name, 770 cmname_buffer_length, 771 _current_method, CHECK); 772 773 name = PerfDataManager::counter_name(thread_i, "type"); 774 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, 775 PerfData::U_None, 776 (jlong)_compile_type, 777 CHECK); 778 779 name = PerfDataManager::counter_name(thread_i, "time"); 780 _perf_time = PerfDataManager::create_counter(SUN_CI, name, 781 PerfData::U_Ticks, CHECK); 782 783 name = PerfDataManager::counter_name(thread_i, "compiles"); 784 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, 785 PerfData::U_Events, CHECK); 786 } 787 } 788 789 // ------------------------------------------------------------------ 790 // CompileBroker::compilation_init 791 // 792 // Initialize the Compilation object 793 void CompileBroker::compilation_init() { 794 _last_method_compiled[0] = '\0'; 795 796 // No need to initialize compilation system if we do not use it. 797 if (!UseCompiler) { 798 return; 799 } 800 #ifndef SHARK 801 // Set the interface to the current compiler(s). 802 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 803 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 804 #ifdef COMPILER1 805 if (c1_count > 0) { 806 _compilers[0] = new Compiler(); 807 } 808 #endif // COMPILER1 809 810 #ifdef COMPILER2 811 if (c2_count > 0) { 812 _compilers[1] = new C2Compiler(); 813 } 814 #endif // COMPILER2 815 816 #else // SHARK 817 int c1_count = 0; 818 int c2_count = 1; 819 820 _compilers[1] = new SharkCompiler(); 821 #endif // SHARK 822 823 // Start the CompilerThreads 824 init_compiler_threads(c1_count, c2_count); 825 // totalTime performance counter is always created as it is required 826 // by the implementation of java.lang.management.CompilationMBean. 827 { 828 EXCEPTION_MARK; 829 _perf_total_compilation = 830 PerfDataManager::create_counter(JAVA_CI, "totalTime", 831 PerfData::U_Ticks, CHECK); 832 } 833 834 835 if (UsePerfData) { 836 837 EXCEPTION_MARK; 838 839 // create the jvmstat performance counters 840 _perf_osr_compilation = 841 PerfDataManager::create_counter(SUN_CI, "osrTime", 842 PerfData::U_Ticks, CHECK); 843 844 _perf_standard_compilation = 845 PerfDataManager::create_counter(SUN_CI, "standardTime", 846 PerfData::U_Ticks, CHECK); 847 848 _perf_total_bailout_count = 849 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 850 PerfData::U_Events, CHECK); 851 852 _perf_total_invalidated_count = 853 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 854 PerfData::U_Events, CHECK); 855 856 _perf_total_compile_count = 857 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 858 PerfData::U_Events, CHECK); 859 _perf_total_osr_compile_count = 860 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 861 PerfData::U_Events, CHECK); 862 863 _perf_total_standard_compile_count = 864 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 865 PerfData::U_Events, CHECK); 866 867 _perf_sum_osr_bytes_compiled = 868 PerfDataManager::create_counter(SUN_CI, "osrBytes", 869 PerfData::U_Bytes, CHECK); 870 871 _perf_sum_standard_bytes_compiled = 872 PerfDataManager::create_counter(SUN_CI, "standardBytes", 873 PerfData::U_Bytes, CHECK); 874 875 _perf_sum_nmethod_size = 876 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 877 PerfData::U_Bytes, CHECK); 878 879 _perf_sum_nmethod_code_size = 880 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 881 PerfData::U_Bytes, CHECK); 882 883 _perf_last_method = 884 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 885 CompilerCounters::cmname_buffer_length, 886 "", CHECK); 887 888 _perf_last_failed_method = 889 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 890 CompilerCounters::cmname_buffer_length, 891 "", CHECK); 892 893 _perf_last_invalidated_method = 894 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 895 CompilerCounters::cmname_buffer_length, 896 "", CHECK); 897 898 _perf_last_compile_type = 899 PerfDataManager::create_variable(SUN_CI, "lastType", 900 PerfData::U_None, 901 (jlong)CompileBroker::no_compile, 902 CHECK); 903 904 _perf_last_compile_size = 905 PerfDataManager::create_variable(SUN_CI, "lastSize", 906 PerfData::U_Bytes, 907 (jlong)CompileBroker::no_compile, 908 CHECK); 909 910 911 _perf_last_failed_type = 912 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 913 PerfData::U_None, 914 (jlong)CompileBroker::no_compile, 915 CHECK); 916 917 _perf_last_invalidated_type = 918 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 919 PerfData::U_None, 920 (jlong)CompileBroker::no_compile, 921 CHECK); 922 } 923 924 _initialized = true; 925 } 926 927 928 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, 929 AbstractCompiler* comp, TRAPS) { 930 CompilerThread* compiler_thread = NULL; 931 932 Klass* k = 933 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), 934 true, CHECK_0); 935 instanceKlassHandle klass (THREAD, k); 936 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 937 Handle string = java_lang_String::create_from_str(name, CHECK_0); 938 939 // Initialize thread_oop to put it into the system threadGroup 940 Handle thread_group (THREAD, Universe::system_thread_group()); 941 JavaValue result(T_VOID); 942 JavaCalls::call_special(&result, thread_oop, 943 klass, 944 vmSymbols::object_initializer_name(), 945 vmSymbols::threadgroup_string_void_signature(), 946 thread_group, 947 string, 948 CHECK_0); 949 950 { 951 MutexLocker mu(Threads_lock, THREAD); 952 compiler_thread = new CompilerThread(queue, counters); 953 // At this point the new CompilerThread data-races with this startup 954 // thread (which I believe is the primoridal thread and NOT the VM 955 // thread). This means Java bytecodes being executed at startup can 956 // queue compile jobs which will run at whatever default priority the 957 // newly created CompilerThread runs at. 958 959 960 // At this point it may be possible that no osthread was created for the 961 // JavaThread due to lack of memory. We would have to throw an exception 962 // in that case. However, since this must work and we do not allow 963 // exceptions anyway, check and abort if this fails. 964 965 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ 966 vm_exit_during_initialization("java.lang.OutOfMemoryError", 967 os::native_thread_creation_failed_msg()); 968 } 969 970 java_lang_Thread::set_thread(thread_oop(), compiler_thread); 971 972 // Note that this only sets the JavaThread _priority field, which by 973 // definition is limited to Java priorities and not OS priorities. 974 // The os-priority is set in the CompilerThread startup code itself 975 976 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 977 978 // Note that we cannot call os::set_priority because it expects Java 979 // priorities and we are *explicitly* using OS priorities so that it's 980 // possible to set the compiler thread priority higher than any Java 981 // thread. 982 983 int native_prio = CompilerThreadPriority; 984 if (native_prio == -1) { 985 if (UseCriticalCompilerThreadPriority) { 986 native_prio = os::java_to_os_priority[CriticalPriority]; 987 } else { 988 native_prio = os::java_to_os_priority[NearMaxPriority]; 989 } 990 } 991 os::set_native_priority(compiler_thread, native_prio); 992 993 java_lang_Thread::set_daemon(thread_oop()); 994 995 compiler_thread->set_threadObj(thread_oop()); 996 compiler_thread->set_compiler(comp); 997 Threads::add(compiler_thread); 998 Thread::start(compiler_thread); 999 } 1000 1001 // Let go of Threads_lock before yielding 1002 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 1003 1004 return compiler_thread; 1005 } 1006 1007 1008 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { 1009 EXCEPTION_MARK; 1010 #if !defined(ZERO) && !defined(SHARK) 1011 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 1012 #endif // !ZERO && !SHARK 1013 // Initialize the compilation queue 1014 if (c2_compiler_count > 0) { 1015 _c2_compile_queue = new CompileQueue("C2 CompileQueue", MethodCompileQueue_lock); 1016 _compilers[1]->set_num_compiler_threads(c2_compiler_count); 1017 } 1018 if (c1_compiler_count > 0) { 1019 _c1_compile_queue = new CompileQueue("C1 CompileQueue", MethodCompileQueue_lock); 1020 _compilers[0]->set_num_compiler_threads(c1_compiler_count); 1021 } 1022 1023 int compiler_count = c1_compiler_count + c2_compiler_count; 1024 1025 _compiler_threads = 1026 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true); 1027 1028 char name_buffer[256]; 1029 for (int i = 0; i < c2_compiler_count; i++) { 1030 // Create a name for our thread. 1031 sprintf(name_buffer, "C2 CompilerThread%d", i); 1032 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 1033 // Shark and C2 1034 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_compile_queue, counters, _compilers[1], CHECK); 1035 _compiler_threads->append(new_thread); 1036 } 1037 1038 for (int i = c2_compiler_count; i < compiler_count; i++) { 1039 // Create a name for our thread. 1040 sprintf(name_buffer, "C1 CompilerThread%d", i); 1041 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 1042 // C1 1043 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_compile_queue, counters, _compilers[0], CHECK); 1044 _compiler_threads->append(new_thread); 1045 } 1046 1047 if (UsePerfData) { 1048 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, compiler_count, CHECK); 1049 } 1050 } 1051 1052 1053 /** 1054 * Set the methods on the stack as on_stack so that redefine classes doesn't 1055 * reclaim them 1056 */ 1057 void CompileBroker::mark_on_stack() { 1058 if (_c2_compile_queue != NULL) { 1059 MutexLocker locker(_c2_compile_queue->lock()); 1060 _c2_compile_queue->mark_on_stack(); 1061 } 1062 if (_c1_compile_queue != NULL) { 1063 MutexLocker locker(_c1_compile_queue->lock()); 1064 _c1_compile_queue->mark_on_stack(); 1065 } 1066 } 1067 1068 // ------------------------------------------------------------------ 1069 // CompileBroker::compile_method 1070 // 1071 // Request compilation of a method. 1072 void CompileBroker::compile_method_base(methodHandle method, 1073 int osr_bci, 1074 int comp_level, 1075 methodHandle hot_method, 1076 int hot_count, 1077 const char* comment, 1078 Thread* thread) { 1079 // do nothing if compiler thread(s) is not available 1080 if (!_initialized) { 1081 return; 1082 } 1083 1084 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 1085 assert(method->method_holder()->oop_is_instance(), 1086 "sanity check"); 1087 assert(!method->method_holder()->is_not_initialized(), 1088 "method holder must be initialized"); 1089 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 1090 1091 if (CIPrintRequests) { 1092 tty->print("request: "); 1093 method->print_short_name(tty); 1094 if (osr_bci != InvocationEntryBci) { 1095 tty->print(" osr_bci: %d", osr_bci); 1096 } 1097 tty->print(" comment: %s count: %d", comment, hot_count); 1098 if (!hot_method.is_null()) { 1099 tty->print(" hot: "); 1100 if (hot_method() != method()) { 1101 hot_method->print_short_name(tty); 1102 } else { 1103 tty->print("yes"); 1104 } 1105 } 1106 tty->cr(); 1107 } 1108 1109 // A request has been made for compilation. Before we do any 1110 // real work, check to see if the method has been compiled 1111 // in the meantime with a definitive result. 1112 if (compilation_is_complete(method, osr_bci, comp_level)) { 1113 return; 1114 } 1115 1116 #ifndef PRODUCT 1117 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1118 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1119 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1120 return; 1121 } 1122 } 1123 #endif 1124 1125 // If this method is already in the compile queue, then 1126 // we do not block the current thread. 1127 if (compilation_is_in_queue(method)) { 1128 // We may want to decay our counter a bit here to prevent 1129 // multiple denied requests for compilation. This is an 1130 // open compilation policy issue. Note: The other possibility, 1131 // in the case that this is a blocking compile request, is to have 1132 // all subsequent blocking requesters wait for completion of 1133 // ongoing compiles. Note that in this case we'll need a protocol 1134 // for freeing the associated compile tasks. [Or we could have 1135 // a single static monitor on which all these waiters sleep.] 1136 return; 1137 } 1138 1139 // If the requesting thread is holding the pending list lock 1140 // then we just return. We can't risk blocking while holding 1141 // the pending list lock or a 3-way deadlock may occur 1142 // between the reference handler thread, a GC (instigated 1143 // by a compiler thread), and compiled method registration. 1144 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) { 1145 return; 1146 } 1147 1148 // Outputs from the following MutexLocker block: 1149 CompileTask* task = NULL; 1150 bool blocking = false; 1151 CompileQueue* queue = compile_queue(comp_level); 1152 1153 // Acquire our lock. 1154 { 1155 MutexLocker locker(queue->lock(), thread); 1156 1157 // Make sure the method has not slipped into the queues since 1158 // last we checked; note that those checks were "fast bail-outs". 1159 // Here we need to be more careful, see 14012000 below. 1160 if (compilation_is_in_queue(method)) { 1161 return; 1162 } 1163 1164 // We need to check again to see if the compilation has 1165 // completed. A previous compilation may have registered 1166 // some result. 1167 if (compilation_is_complete(method, osr_bci, comp_level)) { 1168 return; 1169 } 1170 1171 // We now know that this compilation is not pending, complete, 1172 // or prohibited. Assign a compile_id to this compilation 1173 // and check to see if it is in our [Start..Stop) range. 1174 int compile_id = assign_compile_id(method, osr_bci); 1175 if (compile_id == 0) { 1176 // The compilation falls outside the allowed range. 1177 return; 1178 } 1179 1180 // Should this thread wait for completion of the compile? 1181 blocking = is_compile_blocking(); 1182 1183 // We will enter the compilation in the queue. 1184 // 14012000: Note that this sets the queued_for_compile bits in 1185 // the target method. We can now reason that a method cannot be 1186 // queued for compilation more than once, as follows: 1187 // Before a thread queues a task for compilation, it first acquires 1188 // the compile queue lock, then checks if the method's queued bits 1189 // are set or it has already been compiled. Thus there can not be two 1190 // instances of a compilation task for the same method on the 1191 // compilation queue. Consider now the case where the compilation 1192 // thread has already removed a task for that method from the queue 1193 // and is in the midst of compiling it. In this case, the 1194 // queued_for_compile bits must be set in the method (and these 1195 // will be visible to the current thread, since the bits were set 1196 // under protection of the compile queue lock, which we hold now. 1197 // When the compilation completes, the compiler thread first sets 1198 // the compilation result and then clears the queued_for_compile 1199 // bits. Neither of these actions are protected by a barrier (or done 1200 // under the protection of a lock), so the only guarantee we have 1201 // (on machines with TSO (Total Store Order)) is that these values 1202 // will update in that order. As a result, the only combinations of 1203 // these bits that the current thread will see are, in temporal order: 1204 // <RESULT, QUEUE> : 1205 // <0, 1> : in compile queue, but not yet compiled 1206 // <1, 1> : compiled but queue bit not cleared 1207 // <1, 0> : compiled and queue bit cleared 1208 // Because we first check the queue bits then check the result bits, 1209 // we are assured that we cannot introduce a duplicate task. 1210 // Note that if we did the tests in the reverse order (i.e. check 1211 // result then check queued bit), we could get the result bit before 1212 // the compilation completed, and the queue bit after the compilation 1213 // completed, and end up introducing a "duplicate" (redundant) task. 1214 // In that case, the compiler thread should first check if a method 1215 // has already been compiled before trying to compile it. 1216 // NOTE: in the event that there are multiple compiler threads and 1217 // there is de-optimization/recompilation, things will get hairy, 1218 // and in that case it's best to protect both the testing (here) of 1219 // these bits, and their updating (here and elsewhere) under a 1220 // common lock. 1221 task = create_compile_task(queue, 1222 compile_id, method, 1223 osr_bci, comp_level, 1224 hot_method, hot_count, comment, 1225 blocking); 1226 } 1227 1228 if (blocking) { 1229 wait_for_completion(task); 1230 } 1231 } 1232 1233 1234 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, 1235 int comp_level, 1236 methodHandle hot_method, int hot_count, 1237 const char* comment, Thread* THREAD) { 1238 // make sure arguments make sense 1239 assert(method->method_holder()->oop_is_instance(), "not an instance method"); 1240 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1241 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1242 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1243 // allow any levels for WhiteBox 1244 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1245 // return quickly if possible 1246 1247 // lock, make sure that the compilation 1248 // isn't prohibited in a straightforward way. 1249 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1250 if (comp == NULL || !comp->can_compile_method(method) || 1251 compilation_is_prohibited(method, osr_bci, comp_level)) { 1252 return NULL; 1253 } 1254 1255 if (osr_bci == InvocationEntryBci) { 1256 // standard compilation 1257 nmethod* method_code = method->code(); 1258 if (method_code != NULL) { 1259 if (compilation_is_complete(method, osr_bci, comp_level)) { 1260 return method_code; 1261 } 1262 } 1263 if (method->is_not_compilable(comp_level)) { 1264 return NULL; 1265 } 1266 } else { 1267 // osr compilation 1268 #ifndef TIERED 1269 // seems like an assert of dubious value 1270 assert(comp_level == CompLevel_highest_tier, 1271 "all OSR compiles are assumed to be at a single compilation lavel"); 1272 #endif // TIERED 1273 // We accept a higher level osr method 1274 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1275 if (nm != NULL) return nm; 1276 if (method->is_not_osr_compilable(comp_level)) return NULL; 1277 } 1278 1279 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1280 // some prerequisites that are compiler specific 1281 if (comp->is_c2() || comp->is_shark()) { 1282 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1283 // Resolve all classes seen in the signature of the method 1284 // we are compiling. 1285 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1286 } 1287 1288 // If the method is native, do the lookup in the thread requesting 1289 // the compilation. Native lookups can load code, which is not 1290 // permitted during compilation. 1291 // 1292 // Note: A native method implies non-osr compilation which is 1293 // checked with an assertion at the entry of this method. 1294 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1295 bool in_base_library; 1296 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1297 if (HAS_PENDING_EXCEPTION) { 1298 // In case of an exception looking up the method, we just forget 1299 // about it. The interpreter will kick-in and throw the exception. 1300 method->set_not_compilable(); // implies is_not_osr_compilable() 1301 CLEAR_PENDING_EXCEPTION; 1302 return NULL; 1303 } 1304 assert(method->has_native_function(), "must have native code by now"); 1305 } 1306 1307 // RedefineClasses() has replaced this method; just return 1308 if (method->is_old()) { 1309 return NULL; 1310 } 1311 1312 // JVMTI -- post_compile_event requires jmethod_id() that may require 1313 // a lock the compiling thread can not acquire. Prefetch it here. 1314 if (JvmtiExport::should_post_compiled_method_load()) { 1315 method->jmethod_id(); 1316 } 1317 1318 // do the compilation 1319 if (method->is_native()) { 1320 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1321 // To properly handle the appendix argument for out-of-line calls we are using a small trampoline that 1322 // pops off the appendix argument and jumps to the target (see gen_special_dispatch in SharedRuntime). 1323 // 1324 // Since normal compiled-to-compiled calls are not able to handle such a thing we MUST generate an adapter 1325 // in this case. If we can't generate one and use it we can not execute the out-of-line method handle calls. 1326 AdapterHandlerLibrary::create_native_wrapper(method); 1327 } else { 1328 return NULL; 1329 } 1330 } else { 1331 // If the compiler is shut off due to code cache getting full 1332 // fail out now so blocking compiles dont hang the java thread 1333 if (!should_compile_new_jobs()) { 1334 CompilationPolicy::policy()->delay_compilation(method()); 1335 return NULL; 1336 } 1337 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD); 1338 } 1339 1340 // return requested nmethod 1341 // We accept a higher level osr method 1342 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1343 } 1344 1345 1346 // ------------------------------------------------------------------ 1347 // CompileBroker::compilation_is_complete 1348 // 1349 // See if compilation of this method is already complete. 1350 bool CompileBroker::compilation_is_complete(methodHandle method, 1351 int osr_bci, 1352 int comp_level) { 1353 bool is_osr = (osr_bci != standard_entry_bci); 1354 if (is_osr) { 1355 if (method->is_not_osr_compilable(comp_level)) { 1356 return true; 1357 } else { 1358 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1359 return (result != NULL); 1360 } 1361 } else { 1362 if (method->is_not_compilable(comp_level)) { 1363 return true; 1364 } else { 1365 nmethod* result = method->code(); 1366 if (result == NULL) return false; 1367 return comp_level == result->comp_level(); 1368 } 1369 } 1370 } 1371 1372 1373 /** 1374 * See if this compilation is already requested. 1375 * 1376 * Implementation note: there is only a single "is in queue" bit 1377 * for each method. This means that the check below is overly 1378 * conservative in the sense that an osr compilation in the queue 1379 * will block a normal compilation from entering the queue (and vice 1380 * versa). This can be remedied by a full queue search to disambiguate 1381 * cases. If it is deemed profitable, this may be done. 1382 */ 1383 bool CompileBroker::compilation_is_in_queue(methodHandle method) { 1384 return method->queued_for_compilation(); 1385 } 1386 1387 // ------------------------------------------------------------------ 1388 // CompileBroker::compilation_is_prohibited 1389 // 1390 // See if this compilation is not allowed. 1391 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { 1392 bool is_native = method->is_native(); 1393 // Some compilers may not support the compilation of natives. 1394 AbstractCompiler *comp = compiler(comp_level); 1395 if (is_native && 1396 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1397 method->set_not_compilable_quietly(comp_level); 1398 return true; 1399 } 1400 1401 bool is_osr = (osr_bci != standard_entry_bci); 1402 // Some compilers may not support on stack replacement. 1403 if (is_osr && 1404 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1405 method->set_not_osr_compilable(comp_level); 1406 return true; 1407 } 1408 1409 // The method may be explicitly excluded by the user. 1410 bool quietly; 1411 if (CompilerOracle::should_exclude(method, quietly)) { 1412 if (!quietly) { 1413 // This does not happen quietly... 1414 ResourceMark rm; 1415 tty->print("### Excluding %s:%s", 1416 method->is_native() ? "generation of native wrapper" : "compile", 1417 (method->is_static() ? " static" : "")); 1418 method->print_short_name(tty); 1419 tty->cr(); 1420 } 1421 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle"); 1422 } 1423 1424 return false; 1425 } 1426 1427 /** 1428 * Generate serialized IDs for compilation requests. If certain debugging flags are used 1429 * and the ID is not within the specified range, the method is not compiled and 0 is returned. 1430 * The function also allows to generate separate compilation IDs for OSR compilations. 1431 */ 1432 int CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { 1433 #ifdef ASSERT 1434 bool is_osr = (osr_bci != standard_entry_bci); 1435 int id; 1436 if (method->is_native()) { 1437 assert(!is_osr, "can't be osr"); 1438 // Adapters, native wrappers and method handle intrinsics 1439 // should be generated always. 1440 return Atomic::add(1, &_compilation_id); 1441 } else if (CICountOSR && is_osr) { 1442 id = Atomic::add(1, &_osr_compilation_id); 1443 if (CIStartOSR <= id && id < CIStopOSR) { 1444 return id; 1445 } 1446 } else { 1447 id = Atomic::add(1, &_compilation_id); 1448 if (CIStart <= id && id < CIStop) { 1449 return id; 1450 } 1451 } 1452 1453 // Method was not in the appropriate compilation range. 1454 method->set_not_compilable_quietly(); 1455 return 0; 1456 #else 1457 // CICountOSR is a develop flag and set to 'false' by default. In a product built, 1458 // only _compilation_id is incremented. 1459 return Atomic::add(1, &_compilation_id); 1460 #endif 1461 } 1462 1463 /** 1464 * Should the current thread block until this compilation request 1465 * has been fulfilled? 1466 */ 1467 bool CompileBroker::is_compile_blocking() { 1468 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); 1469 return !BackgroundCompilation; 1470 } 1471 1472 1473 // ------------------------------------------------------------------ 1474 // CompileBroker::preload_classes 1475 void CompileBroker::preload_classes(methodHandle method, TRAPS) { 1476 // Move this code over from c1_Compiler.cpp 1477 ShouldNotReachHere(); 1478 } 1479 1480 1481 // ------------------------------------------------------------------ 1482 // CompileBroker::create_compile_task 1483 // 1484 // Create a CompileTask object representing the current request for 1485 // compilation. Add this task to the queue. 1486 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1487 int compile_id, 1488 methodHandle method, 1489 int osr_bci, 1490 int comp_level, 1491 methodHandle hot_method, 1492 int hot_count, 1493 const char* comment, 1494 bool blocking) { 1495 CompileTask* new_task = CompileTask::allocate(); 1496 new_task->initialize(compile_id, method, osr_bci, comp_level, 1497 hot_method, hot_count, comment, 1498 blocking); 1499 queue->add(new_task); 1500 return new_task; 1501 } 1502 1503 1504 /** 1505 * Wait for the compilation task to complete. 1506 */ 1507 void CompileBroker::wait_for_completion(CompileTask* task) { 1508 if (CIPrintCompileQueue) { 1509 ttyLocker ttyl; 1510 tty->print_cr("BLOCKING FOR COMPILE"); 1511 } 1512 1513 assert(task->is_blocking(), "can only wait on blocking task"); 1514 1515 JavaThread* thread = JavaThread::current(); 1516 thread->set_blocked_on_compilation(true); 1517 1518 methodHandle method(thread, task->method()); 1519 { 1520 MutexLocker waiter(task->lock(), thread); 1521 1522 while (!task->is_complete() && !is_compilation_disabled_forever()) { 1523 task->lock()->wait(); 1524 } 1525 } 1526 1527 thread->set_blocked_on_compilation(false); 1528 if (is_compilation_disabled_forever()) { 1529 CompileTask::free(task); 1530 return; 1531 } 1532 1533 // It is harmless to check this status without the lock, because 1534 // completion is a stable property (until the task object is recycled). 1535 assert(task->is_complete(), "Compilation should have completed"); 1536 assert(task->code_handle() == NULL, "must be reset"); 1537 1538 // By convention, the waiter is responsible for recycling a 1539 // blocking CompileTask. Since there is only one waiter ever 1540 // waiting on a CompileTask, we know that no one else will 1541 // be using this CompileTask; we can free it. 1542 CompileTask::free(task); 1543 } 1544 1545 /** 1546 * Initialize compiler thread(s) + compiler object(s). The postcondition 1547 * of this function is that the compiler runtimes are initialized and that 1548 * compiler threads can start compiling. 1549 */ 1550 bool CompileBroker::init_compiler_runtime() { 1551 CompilerThread* thread = CompilerThread::current(); 1552 AbstractCompiler* comp = thread->compiler(); 1553 // Final sanity check - the compiler object must exist 1554 guarantee(comp != NULL, "Compiler object must exist"); 1555 1556 int system_dictionary_modification_counter; 1557 { 1558 MutexLocker locker(Compile_lock, thread); 1559 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1560 } 1561 1562 { 1563 // Must switch to native to allocate ci_env 1564 ThreadToNativeFromVM ttn(thread); 1565 ciEnv ci_env(NULL, system_dictionary_modification_counter); 1566 // Cache Jvmti state 1567 ci_env.cache_jvmti_state(); 1568 // Cache DTrace flags 1569 ci_env.cache_dtrace_flags(); 1570 1571 // Switch back to VM state to do compiler initialization 1572 ThreadInVMfromNative tv(thread); 1573 ResetNoHandleMark rnhm; 1574 1575 1576 if (!comp->is_shark()) { 1577 // Perform per-thread and global initializations 1578 comp->initialize(); 1579 } 1580 } 1581 1582 if (comp->is_failed()) { 1583 disable_compilation_forever(); 1584 // If compiler initialization failed, no compiler thread that is specific to a 1585 // particular compiler runtime will ever start to compile methods. 1586 shutdown_compiler_runtime(comp, thread); 1587 return false; 1588 } 1589 1590 // C1 specific check 1591 if (comp->is_c1() && (thread->get_buffer_blob() == NULL)) { 1592 warning("Initialization of %s thread failed (no space to run compilers)", thread->name()); 1593 return false; 1594 } 1595 1596 return true; 1597 } 1598 1599 /** 1600 * If C1 and/or C2 initialization failed, we shut down all compilation. 1601 * We do this to keep things simple. This can be changed if it ever turns 1602 * out to be a problem. 1603 */ 1604 void CompileBroker::shutdown_compiler_runtime(AbstractCompiler* comp, CompilerThread* thread) { 1605 // Free buffer blob, if allocated 1606 if (thread->get_buffer_blob() != NULL) { 1607 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1608 CodeCache::free(thread->get_buffer_blob()); 1609 } 1610 1611 if (comp->should_perform_shutdown()) { 1612 // There are two reasons for shutting down the compiler 1613 // 1) compiler runtime initialization failed 1614 // 2) The code cache is full and the following flag is set: -XX:-UseCodeCacheFlushing 1615 warning("%s initialization failed. Shutting down all compilers", comp->name()); 1616 1617 // Only one thread per compiler runtime object enters here 1618 // Set state to shut down 1619 comp->set_shut_down(); 1620 1621 // Delete all queued compilation tasks to make compiler threads exit faster. 1622 if (_c1_compile_queue != NULL) { 1623 _c1_compile_queue->free_all(); 1624 } 1625 1626 if (_c2_compile_queue != NULL) { 1627 _c2_compile_queue->free_all(); 1628 } 1629 1630 // Set flags so that we continue execution with using interpreter only. 1631 UseCompiler = false; 1632 UseInterpreter = true; 1633 1634 // We could delete compiler runtimes also. However, there are references to 1635 // the compiler runtime(s) (e.g., nmethod::is_compiled_by_c1()) which then 1636 // fail. This can be done later if necessary. 1637 } 1638 } 1639 1640 // ------------------------------------------------------------------ 1641 // CompileBroker::compiler_thread_loop 1642 // 1643 // The main loop run by a CompilerThread. 1644 void CompileBroker::compiler_thread_loop() { 1645 CompilerThread* thread = CompilerThread::current(); 1646 CompileQueue* queue = thread->queue(); 1647 // For the thread that initializes the ciObjectFactory 1648 // this resource mark holds all the shared objects 1649 ResourceMark rm; 1650 1651 // First thread to get here will initialize the compiler interface 1652 1653 if (!ciObjectFactory::is_initialized()) { 1654 ASSERT_IN_VM; 1655 MutexLocker only_one (CompileThread_lock, thread); 1656 if (!ciObjectFactory::is_initialized()) { 1657 ciObjectFactory::initialize(); 1658 } 1659 } 1660 1661 // Open a log. 1662 if (LogCompilation) { 1663 init_compiler_thread_log(); 1664 } 1665 CompileLog* log = thread->log(); 1666 if (log != NULL) { 1667 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1668 thread->name(), 1669 os::current_thread_id(), 1670 os::current_process_id()); 1671 log->stamp(); 1672 log->end_elem(); 1673 } 1674 1675 // If compiler thread/runtime initialization fails, exit the compiler thread 1676 if (!init_compiler_runtime()) { 1677 return; 1678 } 1679 1680 // Poll for new compilation tasks as long as the JVM runs. Compilation 1681 // should only be disabled if something went wrong while initializing the 1682 // compiler runtimes. This, in turn, should not happen. The only known case 1683 // when compiler runtime initialization fails is if there is not enough free 1684 // space in the code cache to generate the necessary stubs, etc. 1685 while (!is_compilation_disabled_forever()) { 1686 // We need this HandleMark to avoid leaking VM handles. 1687 HandleMark hm(thread); 1688 1689 if (CodeCache::unallocated_capacity() < CodeCacheMinimumFreeSpace) { 1690 // the code cache is really full 1691 handle_full_code_cache(); 1692 } 1693 1694 CompileTask* task = queue->get(); 1695 if (task == NULL) { 1696 continue; 1697 } 1698 1699 // Give compiler threads an extra quanta. They tend to be bursty and 1700 // this helps the compiler to finish up the job. 1701 if( CompilerThreadHintNoPreempt ) 1702 os::hint_no_preempt(); 1703 1704 // trace per thread time and compile statistics 1705 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); 1706 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); 1707 1708 // Assign the task to the current thread. Mark this compilation 1709 // thread as active for the profiler. 1710 CompileTaskWrapper ctw(task); 1711 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1712 task->set_code_handle(&result_handle); 1713 methodHandle method(thread, task->method()); 1714 1715 // Never compile a method if breakpoints are present in it 1716 if (method()->number_of_breakpoints() == 0) { 1717 // Compile the method. 1718 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1719 #ifdef COMPILER1 1720 // Allow repeating compilations for the purpose of benchmarking 1721 // compile speed. This is not useful for customers. 1722 if (CompilationRepeat != 0) { 1723 int compile_count = CompilationRepeat; 1724 while (compile_count > 0) { 1725 invoke_compiler_on_method(task); 1726 nmethod* nm = method->code(); 1727 if (nm != NULL) { 1728 nm->make_zombie(); 1729 method->clear_code(); 1730 } 1731 compile_count--; 1732 } 1733 } 1734 #endif /* COMPILER1 */ 1735 invoke_compiler_on_method(task); 1736 } else { 1737 // After compilation is disabled, remove remaining methods from queue 1738 method->clear_queued_for_compilation(); 1739 } 1740 } 1741 } 1742 1743 // Shut down compiler runtime 1744 shutdown_compiler_runtime(thread->compiler(), thread); 1745 } 1746 1747 // ------------------------------------------------------------------ 1748 // CompileBroker::init_compiler_thread_log 1749 // 1750 // Set up state required by +LogCompilation. 1751 void CompileBroker::init_compiler_thread_log() { 1752 CompilerThread* thread = CompilerThread::current(); 1753 char file_name[4*K]; 1754 FILE* fp = NULL; 1755 intx thread_id = os::current_thread_id(); 1756 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1757 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1758 if (dir == NULL) { 1759 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1760 thread_id, os::current_process_id()); 1761 } else { 1762 jio_snprintf(file_name, sizeof(file_name), 1763 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1764 os::file_separator(), thread_id, os::current_process_id()); 1765 } 1766 1767 fp = fopen(file_name, "at"); 1768 if (fp != NULL) { 1769 if (LogCompilation && Verbose) { 1770 tty->print_cr("Opening compilation log %s", file_name); 1771 } 1772 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1773 thread->init_log(log); 1774 1775 if (xtty != NULL) { 1776 ttyLocker ttyl; 1777 // Record any per thread log files 1778 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name); 1779 } 1780 return; 1781 } 1782 } 1783 warning("Cannot open log file: %s", file_name); 1784 } 1785 1786 // ------------------------------------------------------------------ 1787 // CompileBroker::set_should_block 1788 // 1789 // Set _should_block. 1790 // Call this from the VM, with Threads_lock held and a safepoint requested. 1791 void CompileBroker::set_should_block() { 1792 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1793 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1794 #ifndef PRODUCT 1795 if (PrintCompilation && (Verbose || WizardMode)) 1796 tty->print_cr("notifying compiler thread pool to block"); 1797 #endif 1798 _should_block = true; 1799 } 1800 1801 // ------------------------------------------------------------------ 1802 // CompileBroker::maybe_block 1803 // 1804 // Call this from the compiler at convenient points, to poll for _should_block. 1805 void CompileBroker::maybe_block() { 1806 if (_should_block) { 1807 #ifndef PRODUCT 1808 if (PrintCompilation && (Verbose || WizardMode)) 1809 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); 1810 #endif 1811 ThreadInVMfromNative tivfn(JavaThread::current()); 1812 } 1813 } 1814 1815 // wrapper for CodeCache::print_summary() 1816 static void codecache_print(bool detailed) 1817 { 1818 ResourceMark rm; 1819 stringStream s; 1820 // Dump code cache into a buffer before locking the tty, 1821 { 1822 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1823 CodeCache::print_summary(&s, detailed); 1824 } 1825 ttyLocker ttyl; 1826 tty->print(s.as_string()); 1827 } 1828 1829 // ------------------------------------------------------------------ 1830 // CompileBroker::invoke_compiler_on_method 1831 // 1832 // Compile a method. 1833 // 1834 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1835 if (PrintCompilation) { 1836 ResourceMark rm; 1837 task->print_line(); 1838 } 1839 elapsedTimer time; 1840 1841 CompilerThread* thread = CompilerThread::current(); 1842 ResourceMark rm(thread); 1843 1844 if (LogEvents) { 1845 _compilation_log->log_compile(thread, task); 1846 } 1847 1848 // Common flags. 1849 uint compile_id = task->compile_id(); 1850 int osr_bci = task->osr_bci(); 1851 bool is_osr = (osr_bci != standard_entry_bci); 1852 bool should_log = (thread->log() != NULL); 1853 bool should_break = false; 1854 int task_level = task->comp_level(); 1855 { 1856 // create the handle inside it's own block so it can't 1857 // accidentally be referenced once the thread transitions to 1858 // native. The NoHandleMark before the transition should catch 1859 // any cases where this occurs in the future. 1860 methodHandle method(thread, task->method()); 1861 should_break = check_break_at(method, compile_id, is_osr); 1862 if (should_log && !CompilerOracle::should_log(method)) { 1863 should_log = false; 1864 } 1865 assert(!method->is_native(), "no longer compile natives"); 1866 1867 // Save information about this method in case of failure. 1868 set_last_compile(thread, method, is_osr, task_level); 1869 1870 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 1871 } 1872 1873 // Allocate a new set of JNI handles. 1874 push_jni_handle_block(); 1875 Method* target_handle = task->method(); 1876 int compilable = ciEnv::MethodCompilable; 1877 { 1878 int system_dictionary_modification_counter; 1879 { 1880 MutexLocker locker(Compile_lock, thread); 1881 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1882 } 1883 1884 NoHandleMark nhm; 1885 ThreadToNativeFromVM ttn(thread); 1886 1887 ciEnv ci_env(task, system_dictionary_modification_counter); 1888 if (should_break) { 1889 ci_env.set_break_at_compile(true); 1890 } 1891 if (should_log) { 1892 ci_env.set_log(thread->log()); 1893 } 1894 assert(thread->env() == &ci_env, "set by ci_env"); 1895 // The thread-env() field is cleared in ~CompileTaskWrapper. 1896 1897 // Cache Jvmti state 1898 ci_env.cache_jvmti_state(); 1899 1900 // Cache DTrace flags 1901 ci_env.cache_dtrace_flags(); 1902 1903 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1904 1905 TraceTime t1("compilation", &time); 1906 EventCompilation event; 1907 1908 AbstractCompiler *comp = compiler(task_level); 1909 if (comp == NULL) { 1910 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 1911 } else { 1912 comp->compile_method(&ci_env, target, osr_bci); 1913 } 1914 1915 if (!ci_env.failing() && task->code() == NULL) { 1916 //assert(false, "compiler should always document failure"); 1917 // The compiler elected, without comment, not to register a result. 1918 // Do not attempt further compilations of this method. 1919 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1920 } 1921 1922 // Copy this bit to the enclosing block: 1923 compilable = ci_env.compilable(); 1924 1925 if (ci_env.failing()) { 1926 const char* retry_message = ci_env.retry_message(); 1927 if (_compilation_log != NULL) { 1928 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message); 1929 } 1930 if (PrintCompilation) { 1931 FormatBufferResource msg = retry_message != NULL ? 1932 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) : 1933 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason()); 1934 task->print_compilation(tty, msg); 1935 } 1936 } else { 1937 task->mark_success(); 1938 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); 1939 if (_compilation_log != NULL) { 1940 nmethod* code = task->code(); 1941 if (code != NULL) { 1942 _compilation_log->log_nmethod(thread, code); 1943 } 1944 } 1945 } 1946 // simulate crash during compilation 1947 assert(task->compile_id() != CICrashAt, "just as planned"); 1948 if (event.should_commit()) { 1949 event.set_method(target->get_Method()); 1950 event.set_compileID(compile_id); 1951 event.set_compileLevel(task->comp_level()); 1952 event.set_succeded(task->is_success()); 1953 event.set_isOsr(is_osr); 1954 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1955 event.set_inlinedBytes(task->num_inlined_bytecodes()); 1956 event.commit(); 1957 } 1958 } 1959 pop_jni_handle_block(); 1960 1961 methodHandle method(thread, task->method()); 1962 1963 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 1964 1965 collect_statistics(thread, time, task); 1966 1967 if (PrintCompilation && PrintCompilation2) { 1968 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 1969 tty->print("%4d ", compile_id); // print compilation number 1970 tty->print("%s ", (is_osr ? "%" : " ")); 1971 if (task->code() != NULL) { 1972 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 1973 } 1974 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 1975 } 1976 1977 if (PrintCodeCacheOnCompilation) 1978 codecache_print(/* detailed= */ false); 1979 1980 // Disable compilation, if required. 1981 switch (compilable) { 1982 case ciEnv::MethodCompilable_never: 1983 if (is_osr) 1984 method->set_not_osr_compilable_quietly(); 1985 else 1986 method->set_not_compilable_quietly(); 1987 break; 1988 case ciEnv::MethodCompilable_not_at_tier: 1989 if (is_osr) 1990 method->set_not_osr_compilable_quietly(task_level); 1991 else 1992 method->set_not_compilable_quietly(task_level); 1993 break; 1994 } 1995 1996 // Note that the queued_for_compilation bits are cleared without 1997 // protection of a mutex. [They were set by the requester thread, 1998 // when adding the task to the complie queue -- at which time the 1999 // compile queue lock was held. Subsequently, we acquired the compile 2000 // queue lock to get this task off the compile queue; thus (to belabour 2001 // the point somewhat) our clearing of the bits must be occurring 2002 // only after the setting of the bits. See also 14012000 above. 2003 method->clear_queued_for_compilation(); 2004 2005 #ifdef ASSERT 2006 if (CollectedHeap::fired_fake_oom()) { 2007 // The current compile received a fake OOM during compilation so 2008 // go ahead and exit the VM since the test apparently succeeded 2009 tty->print_cr("*** Shutting down VM after successful fake OOM"); 2010 vm_exit(0); 2011 } 2012 #endif 2013 } 2014 2015 /** 2016 * The CodeCache is full. Print out warning and disable compilation 2017 * or try code cache cleaning so compilation can continue later. 2018 */ 2019 void CompileBroker::handle_full_code_cache() { 2020 UseInterpreter = true; 2021 if (UseCompiler || AlwaysCompileLoopMethods ) { 2022 if (xtty != NULL) { 2023 ResourceMark rm; 2024 stringStream s; 2025 // Dump code cache state into a buffer before locking the tty, 2026 // because log_state() will use locks causing lock conflicts. 2027 CodeCache::log_state(&s); 2028 // Lock to prevent tearing 2029 ttyLocker ttyl; 2030 xtty->begin_elem("code_cache_full"); 2031 xtty->print(s.as_string()); 2032 xtty->stamp(); 2033 xtty->end_elem(); 2034 } 2035 2036 CodeCache::report_codemem_full(); 2037 2038 #ifndef PRODUCT 2039 if (CompileTheWorld || ExitOnFullCodeCache) { 2040 codecache_print(/* detailed= */ true); 2041 before_exit(JavaThread::current()); 2042 exit_globals(); // will delete tty 2043 vm_direct_exit(CompileTheWorld ? 0 : 1); 2044 } 2045 #endif 2046 if (UseCodeCacheFlushing) { 2047 // Since code cache is full, immediately stop new compiles 2048 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 2049 NMethodSweeper::log_sweep("disable_compiler"); 2050 } 2051 // Switch to 'vm_state'. This ensures that possibly_sweep() can be called 2052 // without having to consider the state in which the current thread is. 2053 ThreadInVMfromUnknown in_vm; 2054 NMethodSweeper::possibly_sweep(); 2055 } else { 2056 disable_compilation_forever(); 2057 } 2058 2059 // Print warning only once 2060 if (should_print_compiler_warning()) { 2061 warning("CodeCache is full. Compiler has been disabled."); 2062 warning("Try increasing the code cache size using -XX:ReservedCodeCacheSize="); 2063 codecache_print(/* detailed= */ true); 2064 } 2065 } 2066 } 2067 2068 // ------------------------------------------------------------------ 2069 // CompileBroker::set_last_compile 2070 // 2071 // Record this compilation for debugging purposes. 2072 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { 2073 ResourceMark rm; 2074 char* method_name = method->name()->as_C_string(); 2075 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 2076 char current_method[CompilerCounters::cmname_buffer_length]; 2077 size_t maxLen = CompilerCounters::cmname_buffer_length; 2078 2079 if (UsePerfData) { 2080 const char* class_name = method->method_holder()->name()->as_C_string(); 2081 2082 size_t s1len = strlen(class_name); 2083 size_t s2len = strlen(method_name); 2084 2085 // check if we need to truncate the string 2086 if (s1len + s2len + 2 > maxLen) { 2087 2088 // the strategy is to lop off the leading characters of the 2089 // class name and the trailing characters of the method name. 2090 2091 if (s2len + 2 > maxLen) { 2092 // lop of the entire class name string, let snprintf handle 2093 // truncation of the method name. 2094 class_name += s1len; // null string 2095 } 2096 else { 2097 // lop off the extra characters from the front of the class name 2098 class_name += ((s1len + s2len + 2) - maxLen); 2099 } 2100 } 2101 2102 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 2103 } 2104 2105 if (CICountOSR && is_osr) { 2106 _last_compile_type = osr_compile; 2107 } else { 2108 _last_compile_type = normal_compile; 2109 } 2110 _last_compile_level = comp_level; 2111 2112 if (UsePerfData) { 2113 CompilerCounters* counters = thread->counters(); 2114 counters->set_current_method(current_method); 2115 counters->set_compile_type((jlong)_last_compile_type); 2116 } 2117 } 2118 2119 2120 // ------------------------------------------------------------------ 2121 // CompileBroker::push_jni_handle_block 2122 // 2123 // Push on a new block of JNI handles. 2124 void CompileBroker::push_jni_handle_block() { 2125 JavaThread* thread = JavaThread::current(); 2126 2127 // Allocate a new block for JNI handles. 2128 // Inlined code from jni_PushLocalFrame() 2129 JNIHandleBlock* java_handles = thread->active_handles(); 2130 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2131 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2132 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2133 thread->set_active_handles(compile_handles); 2134 } 2135 2136 2137 // ------------------------------------------------------------------ 2138 // CompileBroker::pop_jni_handle_block 2139 // 2140 // Pop off the current block of JNI handles. 2141 void CompileBroker::pop_jni_handle_block() { 2142 JavaThread* thread = JavaThread::current(); 2143 2144 // Release our JNI handle block 2145 JNIHandleBlock* compile_handles = thread->active_handles(); 2146 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2147 thread->set_active_handles(java_handles); 2148 compile_handles->set_pop_frame_link(NULL); 2149 JNIHandleBlock::release_block(compile_handles, thread); // may block 2150 } 2151 2152 2153 // ------------------------------------------------------------------ 2154 // CompileBroker::check_break_at 2155 // 2156 // Should the compilation break at the current compilation. 2157 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { 2158 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { 2159 return true; 2160 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling 2161 return true; 2162 } else { 2163 return (compile_id == CIBreakAt); 2164 } 2165 } 2166 2167 // ------------------------------------------------------------------ 2168 // CompileBroker::collect_statistics 2169 // 2170 // Collect statistics about the compilation. 2171 2172 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2173 bool success = task->is_success(); 2174 methodHandle method (thread, task->method()); 2175 uint compile_id = task->compile_id(); 2176 bool is_osr = (task->osr_bci() != standard_entry_bci); 2177 nmethod* code = task->code(); 2178 CompilerCounters* counters = thread->counters(); 2179 2180 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2181 MutexLocker locker(CompileStatistics_lock); 2182 2183 // _perf variables are production performance counters which are 2184 // updated regardless of the setting of the CITime and CITimeEach flags 2185 // 2186 if (!success) { 2187 _total_bailout_count++; 2188 if (UsePerfData) { 2189 _perf_last_failed_method->set_value(counters->current_method()); 2190 _perf_last_failed_type->set_value(counters->compile_type()); 2191 _perf_total_bailout_count->inc(); 2192 } 2193 } else if (code == NULL) { 2194 if (UsePerfData) { 2195 _perf_last_invalidated_method->set_value(counters->current_method()); 2196 _perf_last_invalidated_type->set_value(counters->compile_type()); 2197 _perf_total_invalidated_count->inc(); 2198 } 2199 _total_invalidated_count++; 2200 } else { 2201 // Compilation succeeded 2202 2203 // update compilation ticks - used by the implementation of 2204 // java.lang.management.CompilationMBean 2205 _perf_total_compilation->inc(time.ticks()); 2206 2207 _t_total_compilation.add(time); 2208 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2209 2210 if (CITime) { 2211 if (is_osr) { 2212 _t_osr_compilation.add(time); 2213 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2214 } else { 2215 _t_standard_compilation.add(time); 2216 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2217 } 2218 } 2219 2220 if (UsePerfData) { 2221 // save the name of the last method compiled 2222 _perf_last_method->set_value(counters->current_method()); 2223 _perf_last_compile_type->set_value(counters->compile_type()); 2224 _perf_last_compile_size->set_value(method->code_size() + 2225 task->num_inlined_bytecodes()); 2226 if (is_osr) { 2227 _perf_osr_compilation->inc(time.ticks()); 2228 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2229 } else { 2230 _perf_standard_compilation->inc(time.ticks()); 2231 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2232 } 2233 } 2234 2235 if (CITimeEach) { 2236 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2237 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2238 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2239 } 2240 2241 // Collect counts of successful compilations 2242 _sum_nmethod_size += code->total_size(); 2243 _sum_nmethod_code_size += code->insts_size(); 2244 _total_compile_count++; 2245 2246 if (UsePerfData) { 2247 _perf_sum_nmethod_size->inc( code->total_size()); 2248 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2249 _perf_total_compile_count->inc(); 2250 } 2251 2252 if (is_osr) { 2253 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2254 _total_osr_compile_count++; 2255 } else { 2256 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2257 _total_standard_compile_count++; 2258 } 2259 } 2260 // set the current method for the thread to null 2261 if (UsePerfData) counters->set_current_method(""); 2262 } 2263 2264 const char* CompileBroker::compiler_name(int comp_level) { 2265 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2266 if (comp == NULL) { 2267 return "no compiler"; 2268 } else { 2269 return (comp->name()); 2270 } 2271 } 2272 2273 void CompileBroker::print_times() { 2274 tty->cr(); 2275 tty->print_cr("Accumulated compiler times (for compiled methods only)"); 2276 tty->print_cr("------------------------------------------------"); 2277 //0000000000111111111122222222223333333333444444444455555555556666666666 2278 //0123456789012345678901234567890123456789012345678901234567890123456789 2279 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); 2280 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", 2281 CompileBroker::_t_standard_compilation.seconds(), 2282 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); 2283 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); 2284 2285 AbstractCompiler *comp = compiler(CompLevel_simple); 2286 if (comp != NULL) { 2287 comp->print_timers(); 2288 } 2289 comp = compiler(CompLevel_full_optimization); 2290 if (comp != NULL) { 2291 comp->print_timers(); 2292 } 2293 tty->cr(); 2294 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count); 2295 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count); 2296 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count); 2297 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; 2298 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); 2299 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); 2300 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); 2301 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); 2302 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); 2303 tty->cr(); 2304 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); 2305 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); 2306 } 2307 2308 // Debugging output for failure 2309 void CompileBroker::print_last_compile() { 2310 if ( _last_compile_level != CompLevel_none && 2311 compiler(_last_compile_level) != NULL && 2312 _last_method_compiled != NULL && 2313 _last_compile_type != no_compile) { 2314 if (_last_compile_type == osr_compile) { 2315 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2316 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2317 } else { 2318 tty->print_cr("Last parse: %d+++(%d) %s", 2319 _compilation_id, _last_compile_level, _last_method_compiled); 2320 } 2321 } 2322 } 2323 2324 2325 void CompileBroker::print_compiler_threads_on(outputStream* st) { 2326 #ifndef PRODUCT 2327 st->print_cr("Compiler thread printing unimplemented."); 2328 st->cr(); 2329 #endif 2330 }