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 #ifndef USDT2 64 HS_DTRACE_PROBE_DECL8(hotspot, method__compile__begin, 65 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t); 66 HS_DTRACE_PROBE_DECL9(hotspot, method__compile__end, 67 char*, intptr_t, char*, intptr_t, char*, intptr_t, char*, intptr_t, bool); 68 69 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) \ 70 { \ 71 Symbol* klass_name = (method)->klass_name(); \ 72 Symbol* name = (method)->name(); \ 73 Symbol* signature = (method)->signature(); \ 74 HS_DTRACE_PROBE8(hotspot, method__compile__begin, \ 75 comp_name, strlen(comp_name), \ 76 klass_name->bytes(), klass_name->utf8_length(), \ 77 name->bytes(), name->utf8_length(), \ 78 signature->bytes(), signature->utf8_length()); \ 79 } 80 81 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 82 { \ 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(method, comp_name) \ 96 { \ 97 Symbol* klass_name = (method)->klass_name(); \ 98 Symbol* name = (method)->name(); \ 99 Symbol* signature = (method)->signature(); \ 100 HOTSPOT_METHOD_COMPILE_BEGIN( \ 101 comp_name, strlen(comp_name), \ 102 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 103 (char *) name->bytes(), name->utf8_length(), \ 104 (char *) signature->bytes(), signature->utf8_length()); \ 105 } 106 107 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) \ 108 { \ 109 Symbol* klass_name = (method)->klass_name(); \ 110 Symbol* name = (method)->name(); \ 111 Symbol* signature = (method)->signature(); \ 112 HOTSPOT_METHOD_COMPILE_END( \ 113 comp_name, strlen(comp_name), \ 114 (char *) klass_name->bytes(), klass_name->utf8_length(), \ 115 (char *) name->bytes(), name->utf8_length(), \ 116 (char *) signature->bytes(), signature->utf8_length(), (success)); \ 117 } 118 #endif /* USDT2 */ 119 120 #else // ndef DTRACE_ENABLED 121 122 #define DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, comp_name) 123 #define DTRACE_METHOD_COMPILE_END_PROBE(method, comp_name, success) 124 125 #endif // ndef DTRACE_ENABLED 126 127 bool CompileBroker::_initialized = false; 128 volatile bool CompileBroker::_should_block = false; 129 volatile jint CompileBroker::_should_compile_new_jobs = run_compilation; 130 131 // The installed compiler(s) 132 AbstractCompiler* CompileBroker::_compilers[2]; 133 134 // These counters are used for assigning id's to each compilation 135 uint CompileBroker::_compilation_id = 0; 136 uint CompileBroker::_osr_compilation_id = 0; 137 138 // Debugging information 139 int CompileBroker::_last_compile_type = no_compile; 140 int CompileBroker::_last_compile_level = CompLevel_none; 141 char CompileBroker::_last_method_compiled[CompileBroker::name_buffer_length]; 142 143 // Performance counters 144 PerfCounter* CompileBroker::_perf_total_compilation = NULL; 145 PerfCounter* CompileBroker::_perf_osr_compilation = NULL; 146 PerfCounter* CompileBroker::_perf_standard_compilation = NULL; 147 148 PerfCounter* CompileBroker::_perf_total_bailout_count = NULL; 149 PerfCounter* CompileBroker::_perf_total_invalidated_count = NULL; 150 PerfCounter* CompileBroker::_perf_total_compile_count = NULL; 151 PerfCounter* CompileBroker::_perf_total_osr_compile_count = NULL; 152 PerfCounter* CompileBroker::_perf_total_standard_compile_count = NULL; 153 154 PerfCounter* CompileBroker::_perf_sum_osr_bytes_compiled = NULL; 155 PerfCounter* CompileBroker::_perf_sum_standard_bytes_compiled = NULL; 156 PerfCounter* CompileBroker::_perf_sum_nmethod_size = NULL; 157 PerfCounter* CompileBroker::_perf_sum_nmethod_code_size = NULL; 158 159 PerfStringVariable* CompileBroker::_perf_last_method = NULL; 160 PerfStringVariable* CompileBroker::_perf_last_failed_method = NULL; 161 PerfStringVariable* CompileBroker::_perf_last_invalidated_method = NULL; 162 PerfVariable* CompileBroker::_perf_last_compile_type = NULL; 163 PerfVariable* CompileBroker::_perf_last_compile_size = NULL; 164 PerfVariable* CompileBroker::_perf_last_failed_type = NULL; 165 PerfVariable* CompileBroker::_perf_last_invalidated_type = NULL; 166 167 // Timers and counters for generating statistics 168 elapsedTimer CompileBroker::_t_total_compilation; 169 elapsedTimer CompileBroker::_t_osr_compilation; 170 elapsedTimer CompileBroker::_t_standard_compilation; 171 172 int CompileBroker::_total_bailout_count = 0; 173 int CompileBroker::_total_invalidated_count = 0; 174 int CompileBroker::_total_compile_count = 0; 175 int CompileBroker::_total_osr_compile_count = 0; 176 int CompileBroker::_total_standard_compile_count = 0; 177 178 int CompileBroker::_sum_osr_bytes_compiled = 0; 179 int CompileBroker::_sum_standard_bytes_compiled = 0; 180 int CompileBroker::_sum_nmethod_size = 0; 181 int CompileBroker::_sum_nmethod_code_size = 0; 182 183 long CompileBroker::_peak_compilation_time = 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 class CompilationLog : public StringEventLog { 193 public: 194 CompilationLog() : StringEventLog("Compilation events") { 195 } 196 197 void log_compile(JavaThread* thread, CompileTask* task) { 198 StringLogMessage lm; 199 stringStream sstr = lm.stream(); 200 // msg.time_stamp().update_to(tty->time_stamp().ticks()); 201 task->print_compilation(&sstr, NULL, true); 202 log(thread, "%s", (const char*)lm); 203 } 204 205 void log_nmethod(JavaThread* thread, nmethod* nm) { 206 log(thread, "nmethod %d%s " INTPTR_FORMAT " code ["INTPTR_FORMAT ", " INTPTR_FORMAT "]", 207 nm->compile_id(), nm->is_osr_method() ? "%" : "", 208 nm, nm->code_begin(), nm->code_end()); 209 } 210 211 void log_failure(JavaThread* thread, CompileTask* task, const char* reason, const char* retry_message) { 212 StringLogMessage lm; 213 lm.print("%4d COMPILE SKIPPED: %s", task->compile_id(), reason); 214 if (retry_message != NULL) { 215 lm.append(" (%s)", retry_message); 216 } 217 lm.print("\n"); 218 log(thread, "%s", (const char*)lm); 219 } 220 }; 221 222 static CompilationLog* _compilation_log = NULL; 223 224 void compileBroker_init() { 225 if (LogEvents) { 226 _compilation_log = new CompilationLog(); 227 } 228 } 229 230 CompileTaskWrapper::CompileTaskWrapper(CompileTask* task) { 231 CompilerThread* thread = CompilerThread::current(); 232 thread->set_task(task); 233 CompileLog* log = thread->log(); 234 if (log != NULL) task->log_task_start(log); 235 } 236 237 CompileTaskWrapper::~CompileTaskWrapper() { 238 CompilerThread* thread = CompilerThread::current(); 239 CompileTask* task = thread->task(); 240 CompileLog* log = thread->log(); 241 if (log != NULL) task->log_task_done(log); 242 thread->set_task(NULL); 243 task->set_code_handle(NULL); 244 thread->set_env(NULL); 245 if (task->is_blocking()) { 246 MutexLocker notifier(task->lock(), thread); 247 task->mark_complete(); 248 // Notify the waiting thread that the compilation has completed. 249 task->lock()->notify_all(); 250 } else { 251 task->mark_complete(); 252 253 // By convention, the compiling thread is responsible for 254 // recycling a non-blocking CompileTask. 255 CompileBroker::free_task(task); 256 } 257 } 258 259 260 // ------------------------------------------------------------------ 261 // CompileTask::initialize 262 void CompileTask::initialize(int compile_id, 263 methodHandle method, 264 int osr_bci, 265 int comp_level, 266 methodHandle hot_method, 267 int hot_count, 268 const char* comment, 269 bool is_blocking) { 270 assert(!_lock->is_locked(), "bad locking"); 271 272 _compile_id = compile_id; 273 _method = method(); 274 _method_holder = JNIHandles::make_global(method->method_holder()->klass_holder()); 275 _osr_bci = osr_bci; 276 _is_blocking = is_blocking; 277 _comp_level = comp_level; 278 _num_inlined_bytecodes = 0; 279 280 _is_complete = false; 281 _is_success = false; 282 _code_handle = NULL; 283 284 _hot_method = NULL; 285 _hot_method_holder = NULL; 286 _hot_count = hot_count; 287 _time_queued = 0; // tidy 288 _comment = comment; 289 290 if (LogCompilation) { 291 _time_queued = os::elapsed_counter(); 292 if (hot_method.not_null()) { 293 if (hot_method == method) { 294 _hot_method = _method; 295 } else { 296 _hot_method = hot_method(); 297 // only add loader or mirror if different from _method_holder 298 _hot_method_holder = JNIHandles::make_global(hot_method->method_holder()->klass_holder()); 299 } 300 } 301 } 302 303 _next = NULL; 304 } 305 306 // ------------------------------------------------------------------ 307 // CompileTask::code/set_code 308 nmethod* CompileTask::code() const { 309 if (_code_handle == NULL) return NULL; 310 return _code_handle->code(); 311 } 312 void CompileTask::set_code(nmethod* nm) { 313 if (_code_handle == NULL && nm == NULL) return; 314 guarantee(_code_handle != NULL, ""); 315 _code_handle->set_code(nm); 316 if (nm == NULL) _code_handle = NULL; // drop the handle also 317 } 318 319 // ------------------------------------------------------------------ 320 // CompileTask::free 321 void CompileTask::free() { 322 set_code(NULL); 323 assert(!_lock->is_locked(), "Should not be locked when freed"); 324 JNIHandles::destroy_global(_method_holder); 325 JNIHandles::destroy_global(_hot_method_holder); 326 } 327 328 329 void CompileTask::mark_on_stack() { 330 // Mark these methods as something redefine classes cannot remove. 331 _method->set_on_stack(true); 332 if (_hot_method != NULL) { 333 _hot_method->set_on_stack(true); 334 } 335 } 336 337 // ------------------------------------------------------------------ 338 // CompileTask::print 339 void CompileTask::print() { 340 tty->print("<CompileTask compile_id=%d ", _compile_id); 341 tty->print("method="); 342 _method->print_name(tty); 343 tty->print_cr(" osr_bci=%d is_blocking=%s is_complete=%s is_success=%s>", 344 _osr_bci, bool_to_str(_is_blocking), 345 bool_to_str(_is_complete), bool_to_str(_is_success)); 346 } 347 348 349 // ------------------------------------------------------------------ 350 // CompileTask::print_line_on_error 351 // 352 // This function is called by fatal error handler when the thread 353 // causing troubles is a compiler thread. 354 // 355 // Do not grab any lock, do not allocate memory. 356 // 357 // Otherwise it's the same as CompileTask::print_line() 358 // 359 void CompileTask::print_line_on_error(outputStream* st, char* buf, int buflen) { 360 // print compiler name 361 st->print("%s:", CompileBroker::compiler_name(comp_level())); 362 print_compilation(st); 363 } 364 365 // ------------------------------------------------------------------ 366 // CompileTask::print_line 367 void CompileTask::print_line() { 368 ttyLocker ttyl; // keep the following output all in one block 369 // print compiler name if requested 370 if (CIPrintCompilerName) tty->print("%s:", CompileBroker::compiler_name(comp_level())); 371 print_compilation(); 372 } 373 374 375 // ------------------------------------------------------------------ 376 // CompileTask::print_compilation_impl 377 void CompileTask::print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level, 378 bool is_osr_method, int osr_bci, bool is_blocking, 379 const char* msg, bool short_form) { 380 if (!short_form) { 381 st->print("%7d ", (int) st->time_stamp().milliseconds()); // print timestamp 382 } 383 st->print("%4d ", compile_id); // print compilation number 384 385 // For unloaded methods the transition to zombie occurs after the 386 // method is cleared so it's impossible to report accurate 387 // information for that case. 388 bool is_synchronized = false; 389 bool has_exception_handler = false; 390 bool is_native = false; 391 if (method != NULL) { 392 is_synchronized = method->is_synchronized(); 393 has_exception_handler = method->has_exception_handler(); 394 is_native = method->is_native(); 395 } 396 // method attributes 397 const char compile_type = is_osr_method ? '%' : ' '; 398 const char sync_char = is_synchronized ? 's' : ' '; 399 const char exception_char = has_exception_handler ? '!' : ' '; 400 const char blocking_char = is_blocking ? 'b' : ' '; 401 const char native_char = is_native ? 'n' : ' '; 402 403 // print method attributes 404 st->print("%c%c%c%c%c ", compile_type, sync_char, exception_char, blocking_char, native_char); 405 406 if (TieredCompilation) { 407 if (comp_level != -1) st->print("%d ", comp_level); 408 else st->print("- "); 409 } 410 st->print(" "); // more indent 411 412 if (method == NULL) { 413 st->print("(method)"); 414 } else { 415 method->print_short_name(st); 416 if (is_osr_method) { 417 st->print(" @ %d", osr_bci); 418 } 419 if (method->is_native()) 420 st->print(" (native)"); 421 else 422 st->print(" (%d bytes)", method->code_size()); 423 } 424 425 if (msg != NULL) { 426 st->print(" %s", msg); 427 } 428 if (!short_form) { 429 st->cr(); 430 } 431 } 432 433 // ------------------------------------------------------------------ 434 // CompileTask::print_inlining 435 void CompileTask::print_inlining(outputStream* st, ciMethod* method, int inline_level, int bci, const char* msg) { 436 // 1234567 437 st->print(" "); // print timestamp 438 // 1234 439 st->print(" "); // print compilation number 440 441 // method attributes 442 if (method->is_loaded()) { 443 const char sync_char = method->is_synchronized() ? 's' : ' '; 444 const char exception_char = method->has_exception_handlers() ? '!' : ' '; 445 const char monitors_char = method->has_monitor_bytecodes() ? 'm' : ' '; 446 447 // print method attributes 448 st->print(" %c%c%c ", sync_char, exception_char, monitors_char); 449 } else { 450 // %s!bn 451 st->print(" "); // print method attributes 452 } 453 454 if (TieredCompilation) { 455 st->print(" "); 456 } 457 st->print(" "); // more indent 458 st->print(" "); // initial inlining indent 459 460 for (int i = 0; i < inline_level; i++) st->print(" "); 461 462 st->print("@ %d ", bci); // print bci 463 method->print_short_name(st); 464 if (method->is_loaded()) 465 st->print(" (%d bytes)", method->code_size()); 466 else 467 st->print(" (not loaded)"); 468 469 if (msg != NULL) { 470 st->print(" %s", msg); 471 } 472 st->cr(); 473 } 474 475 // ------------------------------------------------------------------ 476 // CompileTask::print_inline_indent 477 void CompileTask::print_inline_indent(int inline_level, outputStream* st) { 478 // 1234567 479 st->print(" "); // print timestamp 480 // 1234 481 st->print(" "); // print compilation number 482 // %s!bn 483 st->print(" "); // print method attributes 484 if (TieredCompilation) { 485 st->print(" "); 486 } 487 st->print(" "); // more indent 488 st->print(" "); // initial inlining indent 489 for (int i = 0; i < inline_level; i++) st->print(" "); 490 } 491 492 // ------------------------------------------------------------------ 493 // CompileTask::print_compilation 494 void CompileTask::print_compilation(outputStream* st, const char* msg, bool short_form) { 495 bool is_osr_method = osr_bci() != InvocationEntryBci; 496 print_compilation_impl(st, method(), compile_id(), comp_level(), is_osr_method, osr_bci(), is_blocking(), msg, short_form); 497 } 498 499 // ------------------------------------------------------------------ 500 // CompileTask::log_task 501 void CompileTask::log_task(xmlStream* log) { 502 Thread* thread = Thread::current(); 503 methodHandle method(thread, this->method()); 504 ResourceMark rm(thread); 505 506 // <task id='9' method='M' osr_bci='X' level='1' blocking='1' stamp='1.234'> 507 log->print(" compile_id='%d'", _compile_id); 508 if (_osr_bci != CompileBroker::standard_entry_bci) { 509 log->print(" compile_kind='osr'"); // same as nmethod::compile_kind 510 } // else compile_kind='c2c' 511 if (!method.is_null()) log->method(method); 512 if (_osr_bci != CompileBroker::standard_entry_bci) { 513 log->print(" osr_bci='%d'", _osr_bci); 514 } 515 if (_comp_level != CompLevel_highest_tier) { 516 log->print(" level='%d'", _comp_level); 517 } 518 if (_is_blocking) { 519 log->print(" blocking='1'"); 520 } 521 log->stamp(); 522 } 523 524 525 // ------------------------------------------------------------------ 526 // CompileTask::log_task_queued 527 void CompileTask::log_task_queued() { 528 Thread* thread = Thread::current(); 529 ttyLocker ttyl; 530 ResourceMark rm(thread); 531 532 xtty->begin_elem("task_queued"); 533 log_task(xtty); 534 if (_comment != NULL) { 535 xtty->print(" comment='%s'", _comment); 536 } 537 if (_hot_method != NULL) { 538 methodHandle hot(thread, _hot_method); 539 methodHandle method(thread, _method); 540 if (hot() != method()) { 541 xtty->method(hot); 542 } 543 } 544 if (_hot_count != 0) { 545 xtty->print(" hot_count='%d'", _hot_count); 546 } 547 xtty->end_elem(); 548 } 549 550 551 // ------------------------------------------------------------------ 552 // CompileTask::log_task_start 553 void CompileTask::log_task_start(CompileLog* log) { 554 log->begin_head("task"); 555 log_task(log); 556 log->end_head(); 557 } 558 559 560 // ------------------------------------------------------------------ 561 // CompileTask::log_task_done 562 void CompileTask::log_task_done(CompileLog* log) { 563 Thread* thread = Thread::current(); 564 methodHandle method(thread, this->method()); 565 ResourceMark rm(thread); 566 567 // <task_done ... stamp='1.234'> </task> 568 nmethod* nm = code(); 569 log->begin_elem("task_done success='%d' nmsize='%d' count='%d'", 570 _is_success, nm == NULL ? 0 : nm->content_size(), 571 method->invocation_count()); 572 int bec = method->backedge_count(); 573 if (bec != 0) log->print(" backedge_count='%d'", bec); 574 // Note: "_is_complete" is about to be set, but is not. 575 if (_num_inlined_bytecodes != 0) { 576 log->print(" inlined_bytes='%d'", _num_inlined_bytecodes); 577 } 578 log->stamp(); 579 log->end_elem(); 580 log->tail("task"); 581 log->clear_identities(); // next task will have different CI 582 if (log->unflushed_count() > 2000) { 583 log->flush(); 584 } 585 log->mark_file_end(); 586 } 587 588 589 590 // ------------------------------------------------------------------ 591 // CompileQueue::add 592 // 593 // Add a CompileTask to a CompileQueue 594 void CompileQueue::add(CompileTask* task) { 595 assert(lock()->owned_by_self(), "must own lock"); 596 597 task->set_next(NULL); 598 task->set_prev(NULL); 599 600 if (_last == NULL) { 601 // The compile queue is empty. 602 assert(_first == NULL, "queue is empty"); 603 _first = task; 604 _last = task; 605 } else { 606 // Append the task to the queue. 607 assert(_last->next() == NULL, "not last"); 608 _last->set_next(task); 609 task->set_prev(_last); 610 _last = task; 611 } 612 ++_size; 613 614 // Mark the method as being in the compile queue. 615 task->method()->set_queued_for_compilation(); 616 617 if (CIPrintCompileQueue) { 618 print(); 619 } 620 621 if (LogCompilation && xtty != NULL) { 622 task->log_task_queued(); 623 } 624 625 // Notify CompilerThreads that a task is available. 626 lock()->notify_all(); 627 } 628 629 // ------------------------------------------------------------------ 630 // CompileQueue::get 631 // 632 // Get the next CompileTask from a CompileQueue 633 CompileTask* CompileQueue::get() { 634 NMethodSweeper::possibly_sweep(); 635 636 MutexLocker locker(lock()); 637 // If _first is NULL we have no more compile jobs. There are two reasons for 638 // having no compile jobs: First, we compiled everything we wanted. Second, 639 // we ran out of code cache so compilation has been disabled. In the latter 640 // case we perform code cache sweeps to free memory such that we can re-enable 641 // compilation. 642 while (_first == NULL) { 643 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs()) { 644 // Wait a certain amount of time to possibly do another sweep. 645 // We must wait until stack scanning has happened so that we can 646 // transition a method's state from 'not_entrant' to 'zombie'. 647 long wait_time = NmethodSweepCheckInterval * 1000; 648 if (FLAG_IS_DEFAULT(NmethodSweepCheckInterval)) { 649 // Only one thread at a time can do sweeping. Scale the 650 // wait time according to the number of compiler threads. 651 // As a result, the next sweep is likely to happen every 100ms 652 // with an arbitrary number of threads that do sweeping. 653 wait_time = 100 * CICompilerCount; 654 } 655 bool timeout = lock()->wait(!Mutex::_no_safepoint_check_flag, wait_time); 656 if (timeout) { 657 MutexUnlocker ul(lock()); 658 NMethodSweeper::possibly_sweep(); 659 } 660 } else { 661 // If there are no compilation tasks and we can compile new jobs 662 // (i.e., there is enough free space in the code cache) there is 663 // no need to invoke the sweeper. As a result, the hotness of methods 664 // remains unchanged. This behavior is desired, since we want to keep 665 // the stable state, i.e., we do not want to evict methods from the 666 // code cache if it is unnecessary. 667 lock()->wait(); 668 } 669 } 670 CompileTask* task = CompilationPolicy::policy()->select_task(this); 671 remove(task); 672 return task; 673 } 674 675 void CompileQueue::remove(CompileTask* task) 676 { 677 assert(lock()->owned_by_self(), "must own lock"); 678 if (task->prev() != NULL) { 679 task->prev()->set_next(task->next()); 680 } else { 681 // max is the first element 682 assert(task == _first, "Sanity"); 683 _first = task->next(); 684 } 685 686 if (task->next() != NULL) { 687 task->next()->set_prev(task->prev()); 688 } else { 689 // max is the last element 690 assert(task == _last, "Sanity"); 691 _last = task->prev(); 692 } 693 --_size; 694 } 695 696 // methods in the compile queue need to be marked as used on the stack 697 // so that they don't get reclaimed by Redefine Classes 698 void CompileQueue::mark_on_stack() { 699 CompileTask* task = _first; 700 while (task != NULL) { 701 task->mark_on_stack(); 702 task = task->next(); 703 } 704 } 705 706 // ------------------------------------------------------------------ 707 // CompileQueue::print 708 void CompileQueue::print() { 709 tty->print_cr("Contents of %s", name()); 710 tty->print_cr("----------------------"); 711 CompileTask* task = _first; 712 while (task != NULL) { 713 task->print_line(); 714 task = task->next(); 715 } 716 tty->print_cr("----------------------"); 717 } 718 719 CompilerCounters::CompilerCounters(const char* thread_name, int instance, TRAPS) { 720 721 _current_method[0] = '\0'; 722 _compile_type = CompileBroker::no_compile; 723 724 if (UsePerfData) { 725 ResourceMark rm; 726 727 // create the thread instance name space string - don't create an 728 // instance subspace if instance is -1 - keeps the adapterThread 729 // counters from having a ".0" namespace. 730 const char* thread_i = (instance == -1) ? thread_name : 731 PerfDataManager::name_space(thread_name, instance); 732 733 734 char* name = PerfDataManager::counter_name(thread_i, "method"); 735 _perf_current_method = 736 PerfDataManager::create_string_variable(SUN_CI, name, 737 cmname_buffer_length, 738 _current_method, CHECK); 739 740 name = PerfDataManager::counter_name(thread_i, "type"); 741 _perf_compile_type = PerfDataManager::create_variable(SUN_CI, name, 742 PerfData::U_None, 743 (jlong)_compile_type, 744 CHECK); 745 746 name = PerfDataManager::counter_name(thread_i, "time"); 747 _perf_time = PerfDataManager::create_counter(SUN_CI, name, 748 PerfData::U_Ticks, CHECK); 749 750 name = PerfDataManager::counter_name(thread_i, "compiles"); 751 _perf_compiles = PerfDataManager::create_counter(SUN_CI, name, 752 PerfData::U_Events, CHECK); 753 } 754 } 755 756 // ------------------------------------------------------------------ 757 // CompileBroker::compilation_init 758 // 759 // Initialize the Compilation object 760 void CompileBroker::compilation_init() { 761 _last_method_compiled[0] = '\0'; 762 763 #ifndef SHARK 764 // Set the interface to the current compiler(s). 765 int c1_count = CompilationPolicy::policy()->compiler_count(CompLevel_simple); 766 int c2_count = CompilationPolicy::policy()->compiler_count(CompLevel_full_optimization); 767 #ifdef COMPILER1 768 if (c1_count > 0) { 769 _compilers[0] = new Compiler(); 770 } 771 #endif // COMPILER1 772 773 #ifdef COMPILER2 774 if (c2_count > 0) { 775 _compilers[1] = new C2Compiler(); 776 } 777 #endif // COMPILER2 778 779 #else // SHARK 780 int c1_count = 0; 781 int c2_count = 1; 782 783 _compilers[1] = new SharkCompiler(); 784 #endif // SHARK 785 786 // Initialize the CompileTask free list 787 _task_free_list = NULL; 788 789 // Start the CompilerThreads 790 init_compiler_threads(c1_count, c2_count); 791 // totalTime performance counter is always created as it is required 792 // by the implementation of java.lang.management.CompilationMBean. 793 { 794 EXCEPTION_MARK; 795 _perf_total_compilation = 796 PerfDataManager::create_counter(JAVA_CI, "totalTime", 797 PerfData::U_Ticks, CHECK); 798 } 799 800 801 if (UsePerfData) { 802 803 EXCEPTION_MARK; 804 805 // create the jvmstat performance counters 806 _perf_osr_compilation = 807 PerfDataManager::create_counter(SUN_CI, "osrTime", 808 PerfData::U_Ticks, CHECK); 809 810 _perf_standard_compilation = 811 PerfDataManager::create_counter(SUN_CI, "standardTime", 812 PerfData::U_Ticks, CHECK); 813 814 _perf_total_bailout_count = 815 PerfDataManager::create_counter(SUN_CI, "totalBailouts", 816 PerfData::U_Events, CHECK); 817 818 _perf_total_invalidated_count = 819 PerfDataManager::create_counter(SUN_CI, "totalInvalidates", 820 PerfData::U_Events, CHECK); 821 822 _perf_total_compile_count = 823 PerfDataManager::create_counter(SUN_CI, "totalCompiles", 824 PerfData::U_Events, CHECK); 825 _perf_total_osr_compile_count = 826 PerfDataManager::create_counter(SUN_CI, "osrCompiles", 827 PerfData::U_Events, CHECK); 828 829 _perf_total_standard_compile_count = 830 PerfDataManager::create_counter(SUN_CI, "standardCompiles", 831 PerfData::U_Events, CHECK); 832 833 _perf_sum_osr_bytes_compiled = 834 PerfDataManager::create_counter(SUN_CI, "osrBytes", 835 PerfData::U_Bytes, CHECK); 836 837 _perf_sum_standard_bytes_compiled = 838 PerfDataManager::create_counter(SUN_CI, "standardBytes", 839 PerfData::U_Bytes, CHECK); 840 841 _perf_sum_nmethod_size = 842 PerfDataManager::create_counter(SUN_CI, "nmethodSize", 843 PerfData::U_Bytes, CHECK); 844 845 _perf_sum_nmethod_code_size = 846 PerfDataManager::create_counter(SUN_CI, "nmethodCodeSize", 847 PerfData::U_Bytes, CHECK); 848 849 _perf_last_method = 850 PerfDataManager::create_string_variable(SUN_CI, "lastMethod", 851 CompilerCounters::cmname_buffer_length, 852 "", CHECK); 853 854 _perf_last_failed_method = 855 PerfDataManager::create_string_variable(SUN_CI, "lastFailedMethod", 856 CompilerCounters::cmname_buffer_length, 857 "", CHECK); 858 859 _perf_last_invalidated_method = 860 PerfDataManager::create_string_variable(SUN_CI, "lastInvalidatedMethod", 861 CompilerCounters::cmname_buffer_length, 862 "", CHECK); 863 864 _perf_last_compile_type = 865 PerfDataManager::create_variable(SUN_CI, "lastType", 866 PerfData::U_None, 867 (jlong)CompileBroker::no_compile, 868 CHECK); 869 870 _perf_last_compile_size = 871 PerfDataManager::create_variable(SUN_CI, "lastSize", 872 PerfData::U_Bytes, 873 (jlong)CompileBroker::no_compile, 874 CHECK); 875 876 877 _perf_last_failed_type = 878 PerfDataManager::create_variable(SUN_CI, "lastFailedType", 879 PerfData::U_None, 880 (jlong)CompileBroker::no_compile, 881 CHECK); 882 883 _perf_last_invalidated_type = 884 PerfDataManager::create_variable(SUN_CI, "lastInvalidatedType", 885 PerfData::U_None, 886 (jlong)CompileBroker::no_compile, 887 CHECK); 888 } 889 890 _initialized = true; 891 } 892 893 894 895 // ------------------------------------------------------------------ 896 // CompileBroker::make_compiler_thread 897 CompilerThread* CompileBroker::make_compiler_thread(const char* name, CompileQueue* queue, CompilerCounters* counters, TRAPS) { 898 CompilerThread* compiler_thread = NULL; 899 900 Klass* k = 901 SystemDictionary::resolve_or_fail(vmSymbols::java_lang_Thread(), 902 true, CHECK_0); 903 instanceKlassHandle klass (THREAD, k); 904 instanceHandle thread_oop = klass->allocate_instance_handle(CHECK_0); 905 Handle string = java_lang_String::create_from_str(name, CHECK_0); 906 907 // Initialize thread_oop to put it into the system threadGroup 908 Handle thread_group (THREAD, Universe::system_thread_group()); 909 JavaValue result(T_VOID); 910 JavaCalls::call_special(&result, thread_oop, 911 klass, 912 vmSymbols::object_initializer_name(), 913 vmSymbols::threadgroup_string_void_signature(), 914 thread_group, 915 string, 916 CHECK_0); 917 918 { 919 MutexLocker mu(Threads_lock, THREAD); 920 compiler_thread = new CompilerThread(queue, counters); 921 // At this point the new CompilerThread data-races with this startup 922 // thread (which I believe is the primoridal thread and NOT the VM 923 // thread). This means Java bytecodes being executed at startup can 924 // queue compile jobs which will run at whatever default priority the 925 // newly created CompilerThread runs at. 926 927 928 // At this point it may be possible that no osthread was created for the 929 // JavaThread due to lack of memory. We would have to throw an exception 930 // in that case. However, since this must work and we do not allow 931 // exceptions anyway, check and abort if this fails. 932 933 if (compiler_thread == NULL || compiler_thread->osthread() == NULL){ 934 vm_exit_during_initialization("java.lang.OutOfMemoryError", 935 "unable to create new native thread"); 936 } 937 938 java_lang_Thread::set_thread(thread_oop(), compiler_thread); 939 940 // Note that this only sets the JavaThread _priority field, which by 941 // definition is limited to Java priorities and not OS priorities. 942 // The os-priority is set in the CompilerThread startup code itself 943 944 java_lang_Thread::set_priority(thread_oop(), NearMaxPriority); 945 946 // Note that we cannot call os::set_priority because it expects Java 947 // priorities and we are *explicitly* using OS priorities so that it's 948 // possible to set the compiler thread priority higher than any Java 949 // thread. 950 951 int native_prio = CompilerThreadPriority; 952 if (native_prio == -1) { 953 if (UseCriticalCompilerThreadPriority) { 954 native_prio = os::java_to_os_priority[CriticalPriority]; 955 } else { 956 native_prio = os::java_to_os_priority[NearMaxPriority]; 957 } 958 } 959 os::set_native_priority(compiler_thread, native_prio); 960 961 java_lang_Thread::set_daemon(thread_oop()); 962 963 compiler_thread->set_threadObj(thread_oop()); 964 Threads::add(compiler_thread); 965 Thread::start(compiler_thread); 966 } 967 968 // Let go of Threads_lock before yielding 969 os::yield(); // make sure that the compiler thread is started early (especially helpful on SOLARIS) 970 971 return compiler_thread; 972 } 973 974 975 // ------------------------------------------------------------------ 976 // CompileBroker::init_compiler_threads 977 // 978 // Initialize the compilation queue 979 void CompileBroker::init_compiler_threads(int c1_compiler_count, int c2_compiler_count) { 980 EXCEPTION_MARK; 981 #if !defined(ZERO) && !defined(SHARK) 982 assert(c2_compiler_count > 0 || c1_compiler_count > 0, "No compilers?"); 983 #endif // !ZERO && !SHARK 984 if (c2_compiler_count > 0) { 985 _c2_method_queue = new CompileQueue("C2MethodQueue", MethodCompileQueue_lock); 986 } 987 if (c1_compiler_count > 0) { 988 _c1_method_queue = new CompileQueue("C1MethodQueue", MethodCompileQueue_lock); 989 } 990 991 int compiler_count = c1_compiler_count + c2_compiler_count; 992 993 _method_threads = 994 new (ResourceObj::C_HEAP, mtCompiler) GrowableArray<CompilerThread*>(compiler_count, true); 995 996 char name_buffer[256]; 997 for (int i = 0; i < c2_compiler_count; i++) { 998 // Create a name for our thread. 999 sprintf(name_buffer, "C2 CompilerThread%d", i); 1000 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 1001 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c2_method_queue, counters, CHECK); 1002 _method_threads->append(new_thread); 1003 } 1004 1005 for (int i = c2_compiler_count; i < compiler_count; i++) { 1006 // Create a name for our thread. 1007 sprintf(name_buffer, "C1 CompilerThread%d", i); 1008 CompilerCounters* counters = new CompilerCounters("compilerThread", i, CHECK); 1009 CompilerThread* new_thread = make_compiler_thread(name_buffer, _c1_method_queue, counters, CHECK); 1010 _method_threads->append(new_thread); 1011 } 1012 1013 if (UsePerfData) { 1014 PerfDataManager::create_constant(SUN_CI, "threads", PerfData::U_Bytes, 1015 compiler_count, CHECK); 1016 } 1017 } 1018 1019 1020 // Set the methods on the stack as on_stack so that redefine classes doesn't 1021 // reclaim them 1022 void CompileBroker::mark_on_stack() { 1023 if (_c2_method_queue != NULL) { 1024 _c2_method_queue->mark_on_stack(); 1025 } 1026 if (_c1_method_queue != NULL) { 1027 _c1_method_queue->mark_on_stack(); 1028 } 1029 } 1030 1031 // ------------------------------------------------------------------ 1032 // CompileBroker::is_idle 1033 bool CompileBroker::is_idle() { 1034 if (_c2_method_queue != NULL && !_c2_method_queue->is_empty()) { 1035 return false; 1036 } else if (_c1_method_queue != NULL && !_c1_method_queue->is_empty()) { 1037 return false; 1038 } else { 1039 int num_threads = _method_threads->length(); 1040 for (int i=0; i<num_threads; i++) { 1041 if (_method_threads->at(i)->task() != NULL) { 1042 return false; 1043 } 1044 } 1045 1046 // No pending or active compilations. 1047 return true; 1048 } 1049 } 1050 1051 1052 // ------------------------------------------------------------------ 1053 // CompileBroker::compile_method 1054 // 1055 // Request compilation of a method. 1056 void CompileBroker::compile_method_base(methodHandle method, 1057 int osr_bci, 1058 int comp_level, 1059 methodHandle hot_method, 1060 int hot_count, 1061 const char* comment, 1062 Thread* thread) { 1063 // do nothing if compiler thread(s) is not available 1064 if (!_initialized ) { 1065 return; 1066 } 1067 1068 guarantee(!method->is_abstract(), "cannot compile abstract methods"); 1069 assert(method->method_holder()->oop_is_instance(), 1070 "sanity check"); 1071 assert(!method->method_holder()->is_not_initialized(), 1072 "method holder must be initialized"); 1073 assert(!method->is_method_handle_intrinsic(), "do not enqueue these guys"); 1074 1075 if (CIPrintRequests) { 1076 tty->print("request: "); 1077 method->print_short_name(tty); 1078 if (osr_bci != InvocationEntryBci) { 1079 tty->print(" osr_bci: %d", osr_bci); 1080 } 1081 tty->print(" comment: %s count: %d", comment, hot_count); 1082 if (!hot_method.is_null()) { 1083 tty->print(" hot: "); 1084 if (hot_method() != method()) { 1085 hot_method->print_short_name(tty); 1086 } else { 1087 tty->print("yes"); 1088 } 1089 } 1090 tty->cr(); 1091 } 1092 1093 // A request has been made for compilation. Before we do any 1094 // real work, check to see if the method has been compiled 1095 // in the meantime with a definitive result. 1096 if (compilation_is_complete(method, osr_bci, comp_level)) { 1097 return; 1098 } 1099 1100 #ifndef PRODUCT 1101 if (osr_bci != -1 && !FLAG_IS_DEFAULT(OSROnlyBCI)) { 1102 if ((OSROnlyBCI > 0) ? (OSROnlyBCI != osr_bci) : (-OSROnlyBCI == osr_bci)) { 1103 // Positive OSROnlyBCI means only compile that bci. Negative means don't compile that BCI. 1104 return; 1105 } 1106 } 1107 #endif 1108 1109 // If this method is already in the compile queue, then 1110 // we do not block the current thread. 1111 if (compilation_is_in_queue(method, osr_bci)) { 1112 // We may want to decay our counter a bit here to prevent 1113 // multiple denied requests for compilation. This is an 1114 // open compilation policy issue. Note: The other possibility, 1115 // in the case that this is a blocking compile request, is to have 1116 // all subsequent blocking requesters wait for completion of 1117 // ongoing compiles. Note that in this case we'll need a protocol 1118 // for freeing the associated compile tasks. [Or we could have 1119 // a single static monitor on which all these waiters sleep.] 1120 return; 1121 } 1122 1123 // If the requesting thread is holding the pending list lock 1124 // then we just return. We can't risk blocking while holding 1125 // the pending list lock or a 3-way deadlock may occur 1126 // between the reference handler thread, a GC (instigated 1127 // by a compiler thread), and compiled method registration. 1128 if (InstanceRefKlass::owns_pending_list_lock(JavaThread::current())) { 1129 return; 1130 } 1131 1132 // Outputs from the following MutexLocker block: 1133 CompileTask* task = NULL; 1134 bool blocking = false; 1135 CompileQueue* queue = compile_queue(comp_level); 1136 1137 // Acquire our lock. 1138 { 1139 MutexLocker locker(queue->lock(), thread); 1140 1141 // Make sure the method has not slipped into the queues since 1142 // last we checked; note that those checks were "fast bail-outs". 1143 // Here we need to be more careful, see 14012000 below. 1144 if (compilation_is_in_queue(method, osr_bci)) { 1145 return; 1146 } 1147 1148 // We need to check again to see if the compilation has 1149 // completed. A previous compilation may have registered 1150 // some result. 1151 if (compilation_is_complete(method, osr_bci, comp_level)) { 1152 return; 1153 } 1154 1155 // We now know that this compilation is not pending, complete, 1156 // or prohibited. Assign a compile_id to this compilation 1157 // and check to see if it is in our [Start..Stop) range. 1158 uint compile_id = assign_compile_id(method, osr_bci); 1159 if (compile_id == 0) { 1160 // The compilation falls outside the allowed range. 1161 return; 1162 } 1163 1164 // Should this thread wait for completion of the compile? 1165 blocking = is_compile_blocking(method, osr_bci); 1166 1167 // We will enter the compilation in the queue. 1168 // 14012000: Note that this sets the queued_for_compile bits in 1169 // the target method. We can now reason that a method cannot be 1170 // queued for compilation more than once, as follows: 1171 // Before a thread queues a task for compilation, it first acquires 1172 // the compile queue lock, then checks if the method's queued bits 1173 // are set or it has already been compiled. Thus there can not be two 1174 // instances of a compilation task for the same method on the 1175 // compilation queue. Consider now the case where the compilation 1176 // thread has already removed a task for that method from the queue 1177 // and is in the midst of compiling it. In this case, the 1178 // queued_for_compile bits must be set in the method (and these 1179 // will be visible to the current thread, since the bits were set 1180 // under protection of the compile queue lock, which we hold now. 1181 // When the compilation completes, the compiler thread first sets 1182 // the compilation result and then clears the queued_for_compile 1183 // bits. Neither of these actions are protected by a barrier (or done 1184 // under the protection of a lock), so the only guarantee we have 1185 // (on machines with TSO (Total Store Order)) is that these values 1186 // will update in that order. As a result, the only combinations of 1187 // these bits that the current thread will see are, in temporal order: 1188 // <RESULT, QUEUE> : 1189 // <0, 1> : in compile queue, but not yet compiled 1190 // <1, 1> : compiled but queue bit not cleared 1191 // <1, 0> : compiled and queue bit cleared 1192 // Because we first check the queue bits then check the result bits, 1193 // we are assured that we cannot introduce a duplicate task. 1194 // Note that if we did the tests in the reverse order (i.e. check 1195 // result then check queued bit), we could get the result bit before 1196 // the compilation completed, and the queue bit after the compilation 1197 // completed, and end up introducing a "duplicate" (redundant) task. 1198 // In that case, the compiler thread should first check if a method 1199 // has already been compiled before trying to compile it. 1200 // NOTE: in the event that there are multiple compiler threads and 1201 // there is de-optimization/recompilation, things will get hairy, 1202 // and in that case it's best to protect both the testing (here) of 1203 // these bits, and their updating (here and elsewhere) under a 1204 // common lock. 1205 task = create_compile_task(queue, 1206 compile_id, method, 1207 osr_bci, comp_level, 1208 hot_method, hot_count, comment, 1209 blocking); 1210 } 1211 1212 if (blocking) { 1213 wait_for_completion(task); 1214 } 1215 } 1216 1217 1218 nmethod* CompileBroker::compile_method(methodHandle method, int osr_bci, 1219 int comp_level, 1220 methodHandle hot_method, int hot_count, 1221 const char* comment, Thread* THREAD) { 1222 // make sure arguments make sense 1223 assert(method->method_holder()->oop_is_instance(), "not an instance method"); 1224 assert(osr_bci == InvocationEntryBci || (0 <= osr_bci && osr_bci < method->code_size()), "bci out of range"); 1225 assert(!method->is_abstract() && (osr_bci == InvocationEntryBci || !method->is_native()), "cannot compile abstract/native methods"); 1226 assert(!method->method_holder()->is_not_initialized(), "method holder must be initialized"); 1227 // allow any levels for WhiteBox 1228 assert(WhiteBoxAPI || TieredCompilation || comp_level == CompLevel_highest_tier, "only CompLevel_highest_tier must be used in non-tiered"); 1229 // return quickly if possible 1230 1231 // lock, make sure that the compilation 1232 // isn't prohibited in a straightforward way. 1233 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 1234 if (comp == NULL || !comp->can_compile_method(method) || 1235 compilation_is_prohibited(method, osr_bci, comp_level)) { 1236 return NULL; 1237 } 1238 1239 if (osr_bci == InvocationEntryBci) { 1240 // standard compilation 1241 nmethod* method_code = method->code(); 1242 if (method_code != NULL) { 1243 if (compilation_is_complete(method, osr_bci, comp_level)) { 1244 return method_code; 1245 } 1246 } 1247 if (method->is_not_compilable(comp_level)) { 1248 return NULL; 1249 } 1250 } else { 1251 // osr compilation 1252 #ifndef TIERED 1253 // seems like an assert of dubious value 1254 assert(comp_level == CompLevel_highest_tier, 1255 "all OSR compiles are assumed to be at a single compilation lavel"); 1256 #endif // TIERED 1257 // We accept a higher level osr method 1258 nmethod* nm = method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1259 if (nm != NULL) return nm; 1260 if (method->is_not_osr_compilable(comp_level)) return NULL; 1261 } 1262 1263 assert(!HAS_PENDING_EXCEPTION, "No exception should be present"); 1264 // some prerequisites that are compiler specific 1265 if (comp->is_c2() || comp->is_shark()) { 1266 method->constants()->resolve_string_constants(CHECK_AND_CLEAR_NULL); 1267 // Resolve all classes seen in the signature of the method 1268 // we are compiling. 1269 Method::load_signature_classes(method, CHECK_AND_CLEAR_NULL); 1270 } 1271 1272 // If the method is native, do the lookup in the thread requesting 1273 // the compilation. Native lookups can load code, which is not 1274 // permitted during compilation. 1275 // 1276 // Note: A native method implies non-osr compilation which is 1277 // checked with an assertion at the entry of this method. 1278 if (method->is_native() && !method->is_method_handle_intrinsic()) { 1279 bool in_base_library; 1280 address adr = NativeLookup::lookup(method, in_base_library, THREAD); 1281 if (HAS_PENDING_EXCEPTION) { 1282 // In case of an exception looking up the method, we just forget 1283 // about it. The interpreter will kick-in and throw the exception. 1284 method->set_not_compilable(); // implies is_not_osr_compilable() 1285 CLEAR_PENDING_EXCEPTION; 1286 return NULL; 1287 } 1288 assert(method->has_native_function(), "must have native code by now"); 1289 } 1290 1291 // RedefineClasses() has replaced this method; just return 1292 if (method->is_old()) { 1293 return NULL; 1294 } 1295 1296 // JVMTI -- post_compile_event requires jmethod_id() that may require 1297 // a lock the compiling thread can not acquire. Prefetch it here. 1298 if (JvmtiExport::should_post_compiled_method_load()) { 1299 method->jmethod_id(); 1300 } 1301 1302 // If the compiler is shut off due to code cache getting full 1303 // fail out now so blocking compiles dont hang the java thread 1304 if (!should_compile_new_jobs()) { 1305 CompilationPolicy::policy()->delay_compilation(method()); 1306 return NULL; 1307 } 1308 1309 // do the compilation 1310 if (method->is_native()) { 1311 if (!PreferInterpreterNativeStubs || method->is_method_handle_intrinsic()) { 1312 // Acquire our lock. 1313 int compile_id; 1314 { 1315 MutexLocker locker(MethodCompileQueue_lock, THREAD); 1316 compile_id = assign_compile_id(method, standard_entry_bci); 1317 } 1318 (void) AdapterHandlerLibrary::create_native_wrapper(method, compile_id); 1319 } else { 1320 return NULL; 1321 } 1322 } else { 1323 compile_method_base(method, osr_bci, comp_level, hot_method, hot_count, comment, THREAD); 1324 } 1325 1326 // return requested nmethod 1327 // We accept a higher level osr method 1328 return osr_bci == InvocationEntryBci ? method->code() : method->lookup_osr_nmethod_for(osr_bci, comp_level, false); 1329 } 1330 1331 1332 // ------------------------------------------------------------------ 1333 // CompileBroker::compilation_is_complete 1334 // 1335 // See if compilation of this method is already complete. 1336 bool CompileBroker::compilation_is_complete(methodHandle method, 1337 int osr_bci, 1338 int comp_level) { 1339 bool is_osr = (osr_bci != standard_entry_bci); 1340 if (is_osr) { 1341 if (method->is_not_osr_compilable(comp_level)) { 1342 return true; 1343 } else { 1344 nmethod* result = method->lookup_osr_nmethod_for(osr_bci, comp_level, true); 1345 return (result != NULL); 1346 } 1347 } else { 1348 if (method->is_not_compilable(comp_level)) { 1349 return true; 1350 } else { 1351 nmethod* result = method->code(); 1352 if (result == NULL) return false; 1353 return comp_level == result->comp_level(); 1354 } 1355 } 1356 } 1357 1358 1359 // ------------------------------------------------------------------ 1360 // CompileBroker::compilation_is_in_queue 1361 // 1362 // See if this compilation is already requested. 1363 // 1364 // Implementation note: there is only a single "is in queue" bit 1365 // for each method. This means that the check below is overly 1366 // conservative in the sense that an osr compilation in the queue 1367 // will block a normal compilation from entering the queue (and vice 1368 // versa). This can be remedied by a full queue search to disambiguate 1369 // cases. If it is deemed profitible, this may be done. 1370 bool CompileBroker::compilation_is_in_queue(methodHandle method, 1371 int osr_bci) { 1372 return method->queued_for_compilation(); 1373 } 1374 1375 // ------------------------------------------------------------------ 1376 // CompileBroker::compilation_is_prohibited 1377 // 1378 // See if this compilation is not allowed. 1379 bool CompileBroker::compilation_is_prohibited(methodHandle method, int osr_bci, int comp_level) { 1380 bool is_native = method->is_native(); 1381 // Some compilers may not support the compilation of natives. 1382 AbstractCompiler *comp = compiler(comp_level); 1383 if (is_native && 1384 (!CICompileNatives || comp == NULL || !comp->supports_native())) { 1385 method->set_not_compilable_quietly(comp_level); 1386 return true; 1387 } 1388 1389 bool is_osr = (osr_bci != standard_entry_bci); 1390 // Some compilers may not support on stack replacement. 1391 if (is_osr && 1392 (!CICompileOSR || comp == NULL || !comp->supports_osr())) { 1393 method->set_not_osr_compilable(comp_level); 1394 return true; 1395 } 1396 1397 // The method may be explicitly excluded by the user. 1398 bool quietly; 1399 if (CompilerOracle::should_exclude(method, quietly)) { 1400 if (!quietly) { 1401 // This does not happen quietly... 1402 ResourceMark rm; 1403 tty->print("### Excluding %s:%s", 1404 method->is_native() ? "generation of native wrapper" : "compile", 1405 (method->is_static() ? " static" : "")); 1406 method->print_short_name(tty); 1407 tty->cr(); 1408 } 1409 method->set_not_compilable(CompLevel_all, !quietly, "excluded by CompilerOracle"); 1410 } 1411 1412 return false; 1413 } 1414 1415 1416 // ------------------------------------------------------------------ 1417 // CompileBroker::assign_compile_id 1418 // 1419 // Assign a serialized id number to this compilation request. If the 1420 // number falls out of the allowed range, return a 0. OSR 1421 // compilations may be numbered separately from regular compilations 1422 // if certain debugging flags are used. 1423 uint CompileBroker::assign_compile_id(methodHandle method, int osr_bci) { 1424 assert(MethodCompileQueue_lock->owner() == Thread::current(), 1425 "must hold the compilation queue lock"); 1426 bool is_osr = (osr_bci != standard_entry_bci); 1427 uint id; 1428 if (CICountOSR && is_osr) { 1429 id = ++_osr_compilation_id; 1430 if ((uint)CIStartOSR <= id && id < (uint)CIStopOSR) { 1431 return id; 1432 } 1433 } else { 1434 id = ++_compilation_id; 1435 if ((uint)CIStart <= id && id < (uint)CIStop) { 1436 return id; 1437 } 1438 } 1439 1440 // Method was not in the appropriate compilation range. 1441 method->set_not_compilable_quietly(); 1442 return 0; 1443 } 1444 1445 1446 // ------------------------------------------------------------------ 1447 // CompileBroker::is_compile_blocking 1448 // 1449 // Should the current thread be blocked until this compilation request 1450 // has been fulfilled? 1451 bool CompileBroker::is_compile_blocking(methodHandle method, int osr_bci) { 1452 assert(!InstanceRefKlass::owns_pending_list_lock(JavaThread::current()), "possible deadlock"); 1453 return !BackgroundCompilation; 1454 } 1455 1456 1457 // ------------------------------------------------------------------ 1458 // CompileBroker::preload_classes 1459 void CompileBroker::preload_classes(methodHandle method, TRAPS) { 1460 // Move this code over from c1_Compiler.cpp 1461 ShouldNotReachHere(); 1462 } 1463 1464 1465 // ------------------------------------------------------------------ 1466 // CompileBroker::create_compile_task 1467 // 1468 // Create a CompileTask object representing the current request for 1469 // compilation. Add this task to the queue. 1470 CompileTask* CompileBroker::create_compile_task(CompileQueue* queue, 1471 int compile_id, 1472 methodHandle method, 1473 int osr_bci, 1474 int comp_level, 1475 methodHandle hot_method, 1476 int hot_count, 1477 const char* comment, 1478 bool blocking) { 1479 CompileTask* new_task = allocate_task(); 1480 new_task->initialize(compile_id, method, osr_bci, comp_level, 1481 hot_method, hot_count, comment, 1482 blocking); 1483 queue->add(new_task); 1484 return new_task; 1485 } 1486 1487 1488 // ------------------------------------------------------------------ 1489 // CompileBroker::allocate_task 1490 // 1491 // Allocate a CompileTask, from the free list if possible. 1492 CompileTask* CompileBroker::allocate_task() { 1493 MutexLocker locker(CompileTaskAlloc_lock); 1494 CompileTask* task = NULL; 1495 if (_task_free_list != NULL) { 1496 task = _task_free_list; 1497 _task_free_list = task->next(); 1498 task->set_next(NULL); 1499 } else { 1500 task = new CompileTask(); 1501 task->set_next(NULL); 1502 } 1503 return task; 1504 } 1505 1506 1507 // ------------------------------------------------------------------ 1508 // CompileBroker::free_task 1509 // 1510 // Add a task to the free list. 1511 void CompileBroker::free_task(CompileTask* task) { 1512 MutexLocker locker(CompileTaskAlloc_lock); 1513 task->free(); 1514 task->set_next(_task_free_list); 1515 _task_free_list = task; 1516 } 1517 1518 1519 // ------------------------------------------------------------------ 1520 // CompileBroker::wait_for_completion 1521 // 1522 // Wait for the given method CompileTask to complete. 1523 void CompileBroker::wait_for_completion(CompileTask* task) { 1524 if (CIPrintCompileQueue) { 1525 tty->print_cr("BLOCKING FOR COMPILE"); 1526 } 1527 1528 assert(task->is_blocking(), "can only wait on blocking task"); 1529 1530 JavaThread *thread = JavaThread::current(); 1531 thread->set_blocked_on_compilation(true); 1532 1533 methodHandle method(thread, task->method()); 1534 { 1535 MutexLocker waiter(task->lock(), thread); 1536 1537 while (!task->is_complete()) 1538 task->lock()->wait(); 1539 } 1540 // It is harmless to check this status without the lock, because 1541 // completion is a stable property (until the task object is recycled). 1542 assert(task->is_complete(), "Compilation should have completed"); 1543 assert(task->code_handle() == NULL, "must be reset"); 1544 1545 thread->set_blocked_on_compilation(false); 1546 1547 // By convention, the waiter is responsible for recycling a 1548 // blocking CompileTask. Since there is only one waiter ever 1549 // waiting on a CompileTask, we know that no one else will 1550 // be using this CompileTask; we can free it. 1551 free_task(task); 1552 } 1553 1554 // ------------------------------------------------------------------ 1555 // CompileBroker::compiler_thread_loop 1556 // 1557 // The main loop run by a CompilerThread. 1558 void CompileBroker::compiler_thread_loop() { 1559 CompilerThread* thread = CompilerThread::current(); 1560 CompileQueue* queue = thread->queue(); 1561 1562 // For the thread that initializes the ciObjectFactory 1563 // this resource mark holds all the shared objects 1564 ResourceMark rm; 1565 1566 // First thread to get here will initialize the compiler interface 1567 1568 if (!ciObjectFactory::is_initialized()) { 1569 ASSERT_IN_VM; 1570 MutexLocker only_one (CompileThread_lock, thread); 1571 if (!ciObjectFactory::is_initialized()) { 1572 ciObjectFactory::initialize(); 1573 } 1574 } 1575 1576 // Open a log. 1577 if (LogCompilation) { 1578 init_compiler_thread_log(); 1579 } 1580 CompileLog* log = thread->log(); 1581 if (log != NULL) { 1582 log->begin_elem("start_compile_thread name='%s' thread='" UINTX_FORMAT "' process='%d'", 1583 thread->name(), 1584 os::current_thread_id(), 1585 os::current_process_id()); 1586 log->stamp(); 1587 log->end_elem(); 1588 } 1589 1590 while (true) { 1591 { 1592 // We need this HandleMark to avoid leaking VM handles. 1593 HandleMark hm(thread); 1594 1595 // Iterate over non-profiled and profiled nmethods 1596 for (int code_blob_type = CodeBlobType::MethodNoProfile; code_blob_type <= CodeBlobType::MethodProfile; ++code_blob_type) { 1597 if (CodeCache::is_full(code_blob_type)) { 1598 // The CodeHeap for this compilation level is really full 1599 handle_full_code_cache(code_blob_type); 1600 } 1601 } 1602 1603 CompileTask* task = queue->get(); 1604 1605 // Give compiler threads an extra quanta. They tend to be bursty and 1606 // this helps the compiler to finish up the job. 1607 if( CompilerThreadHintNoPreempt ) 1608 os::hint_no_preempt(); 1609 1610 // trace per thread time and compile statistics 1611 CompilerCounters* counters = ((CompilerThread*)thread)->counters(); 1612 PerfTraceTimedEvent(counters->time_counter(), counters->compile_counter()); 1613 1614 // Assign the task to the current thread. Mark this compilation 1615 // thread as active for the profiler. 1616 CompileTaskWrapper ctw(task); 1617 nmethodLocker result_handle; // (handle for the nmethod produced by this task) 1618 task->set_code_handle(&result_handle); 1619 methodHandle method(thread, task->method()); 1620 1621 // Never compile a method if breakpoints are present in it 1622 if (method()->number_of_breakpoints() == 0) { 1623 // Compile the method. 1624 if ((UseCompiler || AlwaysCompileLoopMethods) && CompileBroker::should_compile_new_jobs()) { 1625 #ifdef COMPILER1 1626 // Allow repeating compilations for the purpose of benchmarking 1627 // compile speed. This is not useful for customers. 1628 if (CompilationRepeat != 0) { 1629 int compile_count = CompilationRepeat; 1630 while (compile_count > 0) { 1631 invoke_compiler_on_method(task); 1632 nmethod* nm = method->code(); 1633 if (nm != NULL) { 1634 nm->make_zombie(); 1635 method->clear_code(); 1636 } 1637 compile_count--; 1638 } 1639 } 1640 #endif /* COMPILER1 */ 1641 invoke_compiler_on_method(task); 1642 } else { 1643 // After compilation is disabled, remove remaining methods from queue 1644 method->clear_queued_for_compilation(); 1645 } 1646 } 1647 } 1648 } 1649 } 1650 1651 1652 // ------------------------------------------------------------------ 1653 // CompileBroker::init_compiler_thread_log 1654 // 1655 // Set up state required by +LogCompilation. 1656 void CompileBroker::init_compiler_thread_log() { 1657 CompilerThread* thread = CompilerThread::current(); 1658 char file_name[4*K]; 1659 FILE* fp = NULL; 1660 intx thread_id = os::current_thread_id(); 1661 for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) { 1662 const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL); 1663 if (dir == NULL) { 1664 jio_snprintf(file_name, sizeof(file_name), "hs_c" UINTX_FORMAT "_pid%u.log", 1665 thread_id, os::current_process_id()); 1666 } else { 1667 jio_snprintf(file_name, sizeof(file_name), 1668 "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir, 1669 os::file_separator(), thread_id, os::current_process_id()); 1670 } 1671 1672 fp = fopen(file_name, "at"); 1673 if (fp != NULL) { 1674 if (LogCompilation && Verbose) { 1675 tty->print_cr("Opening compilation log %s", file_name); 1676 } 1677 CompileLog* log = new(ResourceObj::C_HEAP, mtCompiler) CompileLog(file_name, fp, thread_id); 1678 thread->init_log(log); 1679 1680 if (xtty != NULL) { 1681 ttyLocker ttyl; 1682 // Record any per thread log files 1683 xtty->elem("thread_logfile thread='%d' filename='%s'", thread_id, file_name); 1684 } 1685 return; 1686 } 1687 } 1688 warning("Cannot open log file: %s", file_name); 1689 } 1690 1691 // ------------------------------------------------------------------ 1692 // CompileBroker::set_should_block 1693 // 1694 // Set _should_block. 1695 // Call this from the VM, with Threads_lock held and a safepoint requested. 1696 void CompileBroker::set_should_block() { 1697 assert(Threads_lock->owner() == Thread::current(), "must have threads lock"); 1698 assert(SafepointSynchronize::is_at_safepoint(), "must be at a safepoint already"); 1699 #ifndef PRODUCT 1700 if (PrintCompilation && (Verbose || WizardMode)) 1701 tty->print_cr("notifying compiler thread pool to block"); 1702 #endif 1703 _should_block = true; 1704 } 1705 1706 // ------------------------------------------------------------------ 1707 // CompileBroker::maybe_block 1708 // 1709 // Call this from the compiler at convenient points, to poll for _should_block. 1710 void CompileBroker::maybe_block() { 1711 if (_should_block) { 1712 #ifndef PRODUCT 1713 if (PrintCompilation && (Verbose || WizardMode)) 1714 tty->print_cr("compiler thread " INTPTR_FORMAT " poll detects block request", Thread::current()); 1715 #endif 1716 ThreadInVMfromNative tivfn(JavaThread::current()); 1717 } 1718 } 1719 1720 // wrapper for CodeCache::print_summary() 1721 static void codecache_print(bool detailed) 1722 { 1723 ResourceMark rm; 1724 stringStream s; 1725 // Dump code cache into a buffer before locking the tty, 1726 { 1727 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); 1728 CodeCache::print_summary(&s, detailed); 1729 } 1730 ttyLocker ttyl; 1731 tty->print(s.as_string()); 1732 } 1733 1734 // ------------------------------------------------------------------ 1735 // CompileBroker::invoke_compiler_on_method 1736 // 1737 // Compile a method. 1738 // 1739 void CompileBroker::invoke_compiler_on_method(CompileTask* task) { 1740 if (PrintCompilation) { 1741 ResourceMark rm; 1742 task->print_line(); 1743 } 1744 elapsedTimer time; 1745 1746 CompilerThread* thread = CompilerThread::current(); 1747 ResourceMark rm(thread); 1748 1749 if (LogEvents) { 1750 _compilation_log->log_compile(thread, task); 1751 } 1752 1753 // Common flags. 1754 uint compile_id = task->compile_id(); 1755 int osr_bci = task->osr_bci(); 1756 bool is_osr = (osr_bci != standard_entry_bci); 1757 bool should_log = (thread->log() != NULL); 1758 bool should_break = false; 1759 int task_level = task->comp_level(); 1760 { 1761 // create the handle inside it's own block so it can't 1762 // accidentally be referenced once the thread transitions to 1763 // native. The NoHandleMark before the transition should catch 1764 // any cases where this occurs in the future. 1765 methodHandle method(thread, task->method()); 1766 should_break = check_break_at(method, compile_id, is_osr); 1767 if (should_log && !CompilerOracle::should_log(method)) { 1768 should_log = false; 1769 } 1770 assert(!method->is_native(), "no longer compile natives"); 1771 1772 // Save information about this method in case of failure. 1773 set_last_compile(thread, method, is_osr, task_level); 1774 1775 DTRACE_METHOD_COMPILE_BEGIN_PROBE(method, compiler_name(task_level)); 1776 } 1777 1778 // Allocate a new set of JNI handles. 1779 push_jni_handle_block(); 1780 Method* target_handle = task->method(); 1781 int compilable = ciEnv::MethodCompilable; 1782 { 1783 int system_dictionary_modification_counter; 1784 { 1785 MutexLocker locker(Compile_lock, thread); 1786 system_dictionary_modification_counter = SystemDictionary::number_of_modifications(); 1787 } 1788 1789 NoHandleMark nhm; 1790 ThreadToNativeFromVM ttn(thread); 1791 1792 ciEnv ci_env(task, system_dictionary_modification_counter); 1793 if (should_break) { 1794 ci_env.set_break_at_compile(true); 1795 } 1796 if (should_log) { 1797 ci_env.set_log(thread->log()); 1798 } 1799 assert(thread->env() == &ci_env, "set by ci_env"); 1800 // The thread-env() field is cleared in ~CompileTaskWrapper. 1801 1802 // Cache Jvmti state 1803 ci_env.cache_jvmti_state(); 1804 1805 // Cache DTrace flags 1806 ci_env.cache_dtrace_flags(); 1807 1808 ciMethod* target = ci_env.get_method_from_handle(target_handle); 1809 1810 TraceTime t1("compilation", &time); 1811 EventCompilation event; 1812 1813 AbstractCompiler *comp = compiler(task_level); 1814 if (comp == NULL) { 1815 ci_env.record_method_not_compilable("no compiler", !TieredCompilation); 1816 } else { 1817 comp->compile_method(&ci_env, target, osr_bci); 1818 } 1819 1820 if (!ci_env.failing() && task->code() == NULL) { 1821 //assert(false, "compiler should always document failure"); 1822 // The compiler elected, without comment, not to register a result. 1823 // Do not attempt further compilations of this method. 1824 ci_env.record_method_not_compilable("compile failed", !TieredCompilation); 1825 } 1826 1827 // Copy this bit to the enclosing block: 1828 compilable = ci_env.compilable(); 1829 1830 if (ci_env.failing()) { 1831 const char* retry_message = ci_env.retry_message(); 1832 if (_compilation_log != NULL) { 1833 _compilation_log->log_failure(thread, task, ci_env.failure_reason(), retry_message); 1834 } 1835 if (PrintCompilation) { 1836 FormatBufferResource msg = retry_message != NULL ? 1837 err_msg_res("COMPILE SKIPPED: %s (%s)", ci_env.failure_reason(), retry_message) : 1838 err_msg_res("COMPILE SKIPPED: %s", ci_env.failure_reason()); 1839 task->print_compilation(tty, msg); 1840 } 1841 } else { 1842 task->mark_success(); 1843 task->set_num_inlined_bytecodes(ci_env.num_inlined_bytecodes()); 1844 if (_compilation_log != NULL) { 1845 nmethod* code = task->code(); 1846 if (code != NULL) { 1847 _compilation_log->log_nmethod(thread, code); 1848 } 1849 } 1850 } 1851 // simulate crash during compilation 1852 assert(task->compile_id() != CICrashAt, "just as planned"); 1853 if (event.should_commit()) { 1854 event.set_method(target->get_Method()); 1855 event.set_compileID(compile_id); 1856 event.set_compileLevel(task->comp_level()); 1857 event.set_succeded(task->is_success()); 1858 event.set_isOsr(is_osr); 1859 event.set_codeSize((task->code() == NULL) ? 0 : task->code()->total_size()); 1860 event.set_inlinedBytes(task->num_inlined_bytecodes()); 1861 event.commit(); 1862 } 1863 } 1864 pop_jni_handle_block(); 1865 1866 methodHandle method(thread, task->method()); 1867 1868 DTRACE_METHOD_COMPILE_END_PROBE(method, compiler_name(task_level), task->is_success()); 1869 1870 collect_statistics(thread, time, task); 1871 1872 if (PrintCompilation && PrintCompilation2) { 1873 tty->print("%7d ", (int) tty->time_stamp().milliseconds()); // print timestamp 1874 tty->print("%4d ", compile_id); // print compilation number 1875 tty->print("%s ", (is_osr ? "%" : " ")); 1876 if (task->code() != NULL) { 1877 tty->print("size: %d(%d) ", task->code()->total_size(), task->code()->insts_size()); 1878 } 1879 tty->print_cr("time: %d inlined: %d bytes", (int)time.milliseconds(), task->num_inlined_bytecodes()); 1880 } 1881 1882 if (PrintCodeCacheOnCompilation) 1883 codecache_print(/* detailed= */ false); 1884 1885 // Disable compilation, if required. 1886 switch (compilable) { 1887 case ciEnv::MethodCompilable_never: 1888 if (is_osr) 1889 method->set_not_osr_compilable_quietly(); 1890 else 1891 method->set_not_compilable_quietly(); 1892 break; 1893 case ciEnv::MethodCompilable_not_at_tier: 1894 if (is_osr) 1895 method->set_not_osr_compilable_quietly(task_level); 1896 else 1897 method->set_not_compilable_quietly(task_level); 1898 break; 1899 } 1900 1901 // Note that the queued_for_compilation bits are cleared without 1902 // protection of a mutex. [They were set by the requester thread, 1903 // when adding the task to the complie queue -- at which time the 1904 // compile queue lock was held. Subsequently, we acquired the compile 1905 // queue lock to get this task off the compile queue; thus (to belabour 1906 // the point somewhat) our clearing of the bits must be occurring 1907 // only after the setting of the bits. See also 14012000 above. 1908 method->clear_queued_for_compilation(); 1909 1910 #ifdef ASSERT 1911 if (CollectedHeap::fired_fake_oom()) { 1912 // The current compile received a fake OOM during compilation so 1913 // go ahead and exit the VM since the test apparently succeeded 1914 tty->print_cr("*** Shutting down VM after successful fake OOM"); 1915 vm_exit(0); 1916 } 1917 #endif 1918 } 1919 1920 // ------------------------------------------------------------------ 1921 // CompileBroker::handle_full_code_cache 1922 // 1923 // The CodeCache is full. Disable compilation or try code cache 1924 // cleaning so compilation can continue later. 1925 void CompileBroker::handle_full_code_cache(int code_blob_type) { 1926 UseInterpreter = true; 1927 if (UseCompiler || AlwaysCompileLoopMethods ) { 1928 if (xtty != NULL) { 1929 ResourceMark rm; 1930 stringStream s; 1931 // Dump code cache state into a buffer before locking the tty, 1932 // because log_state() will use locks causing lock conflicts. 1933 CodeCache::log_state(&s); 1934 // Lock to prevent tearing 1935 ttyLocker ttyl; 1936 xtty->begin_elem("code_cache_full"); 1937 xtty->print(s.as_string()); 1938 xtty->stamp(); 1939 xtty->end_elem(); 1940 } 1941 1942 #ifndef PRODUCT 1943 if (CompileTheWorld || ExitOnFullCodeCache) { 1944 codecache_print(/* detailed= */ true); 1945 before_exit(JavaThread::current()); 1946 exit_globals(); // will delete tty 1947 vm_direct_exit(CompileTheWorld ? 0 : 1); 1948 } 1949 #endif 1950 if (UseCodeCacheFlushing) { 1951 // Since code cache is full, immediately stop new compiles 1952 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) { 1953 NMethodSweeper::log_sweep("disable_compiler"); 1954 NMethodSweeper::possibly_sweep(); 1955 } 1956 } else { 1957 UseCompiler = false; 1958 AlwaysCompileLoopMethods = false; 1959 } 1960 } 1961 CodeCache::report_codemem_full(code_blob_type); 1962 } 1963 1964 // ------------------------------------------------------------------ 1965 // CompileBroker::set_last_compile 1966 // 1967 // Record this compilation for debugging purposes. 1968 void CompileBroker::set_last_compile(CompilerThread* thread, methodHandle method, bool is_osr, int comp_level) { 1969 ResourceMark rm; 1970 char* method_name = method->name()->as_C_string(); 1971 strncpy(_last_method_compiled, method_name, CompileBroker::name_buffer_length); 1972 char current_method[CompilerCounters::cmname_buffer_length]; 1973 size_t maxLen = CompilerCounters::cmname_buffer_length; 1974 1975 if (UsePerfData) { 1976 const char* class_name = method->method_holder()->name()->as_C_string(); 1977 1978 size_t s1len = strlen(class_name); 1979 size_t s2len = strlen(method_name); 1980 1981 // check if we need to truncate the string 1982 if (s1len + s2len + 2 > maxLen) { 1983 1984 // the strategy is to lop off the leading characters of the 1985 // class name and the trailing characters of the method name. 1986 1987 if (s2len + 2 > maxLen) { 1988 // lop of the entire class name string, let snprintf handle 1989 // truncation of the method name. 1990 class_name += s1len; // null string 1991 } 1992 else { 1993 // lop off the extra characters from the front of the class name 1994 class_name += ((s1len + s2len + 2) - maxLen); 1995 } 1996 } 1997 1998 jio_snprintf(current_method, maxLen, "%s %s", class_name, method_name); 1999 } 2000 2001 if (CICountOSR && is_osr) { 2002 _last_compile_type = osr_compile; 2003 } else { 2004 _last_compile_type = normal_compile; 2005 } 2006 _last_compile_level = comp_level; 2007 2008 if (UsePerfData) { 2009 CompilerCounters* counters = thread->counters(); 2010 counters->set_current_method(current_method); 2011 counters->set_compile_type((jlong)_last_compile_type); 2012 } 2013 } 2014 2015 2016 // ------------------------------------------------------------------ 2017 // CompileBroker::push_jni_handle_block 2018 // 2019 // Push on a new block of JNI handles. 2020 void CompileBroker::push_jni_handle_block() { 2021 JavaThread* thread = JavaThread::current(); 2022 2023 // Allocate a new block for JNI handles. 2024 // Inlined code from jni_PushLocalFrame() 2025 JNIHandleBlock* java_handles = thread->active_handles(); 2026 JNIHandleBlock* compile_handles = JNIHandleBlock::allocate_block(thread); 2027 assert(compile_handles != NULL && java_handles != NULL, "should not be NULL"); 2028 compile_handles->set_pop_frame_link(java_handles); // make sure java handles get gc'd. 2029 thread->set_active_handles(compile_handles); 2030 } 2031 2032 2033 // ------------------------------------------------------------------ 2034 // CompileBroker::pop_jni_handle_block 2035 // 2036 // Pop off the current block of JNI handles. 2037 void CompileBroker::pop_jni_handle_block() { 2038 JavaThread* thread = JavaThread::current(); 2039 2040 // Release our JNI handle block 2041 JNIHandleBlock* compile_handles = thread->active_handles(); 2042 JNIHandleBlock* java_handles = compile_handles->pop_frame_link(); 2043 thread->set_active_handles(java_handles); 2044 compile_handles->set_pop_frame_link(NULL); 2045 JNIHandleBlock::release_block(compile_handles, thread); // may block 2046 } 2047 2048 2049 // ------------------------------------------------------------------ 2050 // CompileBroker::check_break_at 2051 // 2052 // Should the compilation break at the current compilation. 2053 bool CompileBroker::check_break_at(methodHandle method, int compile_id, bool is_osr) { 2054 if (CICountOSR && is_osr && (compile_id == CIBreakAtOSR)) { 2055 return true; 2056 } else if( CompilerOracle::should_break_at(method) ) { // break when compiling 2057 return true; 2058 } else { 2059 return (compile_id == CIBreakAt); 2060 } 2061 } 2062 2063 // ------------------------------------------------------------------ 2064 // CompileBroker::collect_statistics 2065 // 2066 // Collect statistics about the compilation. 2067 2068 void CompileBroker::collect_statistics(CompilerThread* thread, elapsedTimer time, CompileTask* task) { 2069 bool success = task->is_success(); 2070 methodHandle method (thread, task->method()); 2071 uint compile_id = task->compile_id(); 2072 bool is_osr = (task->osr_bci() != standard_entry_bci); 2073 nmethod* code = task->code(); 2074 CompilerCounters* counters = thread->counters(); 2075 2076 assert(code == NULL || code->is_locked_by_vm(), "will survive the MutexLocker"); 2077 MutexLocker locker(CompileStatistics_lock); 2078 2079 // _perf variables are production performance counters which are 2080 // updated regardless of the setting of the CITime and CITimeEach flags 2081 // 2082 if (!success) { 2083 _total_bailout_count++; 2084 if (UsePerfData) { 2085 _perf_last_failed_method->set_value(counters->current_method()); 2086 _perf_last_failed_type->set_value(counters->compile_type()); 2087 _perf_total_bailout_count->inc(); 2088 } 2089 } else if (code == NULL) { 2090 if (UsePerfData) { 2091 _perf_last_invalidated_method->set_value(counters->current_method()); 2092 _perf_last_invalidated_type->set_value(counters->compile_type()); 2093 _perf_total_invalidated_count->inc(); 2094 } 2095 _total_invalidated_count++; 2096 } else { 2097 // Compilation succeeded 2098 2099 // update compilation ticks - used by the implementation of 2100 // java.lang.management.CompilationMBean 2101 _perf_total_compilation->inc(time.ticks()); 2102 2103 _t_total_compilation.add(time); 2104 _peak_compilation_time = time.milliseconds() > _peak_compilation_time ? time.milliseconds() : _peak_compilation_time; 2105 2106 if (CITime) { 2107 if (is_osr) { 2108 _t_osr_compilation.add(time); 2109 _sum_osr_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2110 } else { 2111 _t_standard_compilation.add(time); 2112 _sum_standard_bytes_compiled += method->code_size() + task->num_inlined_bytecodes(); 2113 } 2114 } 2115 2116 if (UsePerfData) { 2117 // save the name of the last method compiled 2118 _perf_last_method->set_value(counters->current_method()); 2119 _perf_last_compile_type->set_value(counters->compile_type()); 2120 _perf_last_compile_size->set_value(method->code_size() + 2121 task->num_inlined_bytecodes()); 2122 if (is_osr) { 2123 _perf_osr_compilation->inc(time.ticks()); 2124 _perf_sum_osr_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2125 } else { 2126 _perf_standard_compilation->inc(time.ticks()); 2127 _perf_sum_standard_bytes_compiled->inc(method->code_size() + task->num_inlined_bytecodes()); 2128 } 2129 } 2130 2131 if (CITimeEach) { 2132 float bytes_per_sec = 1.0 * (method->code_size() + task->num_inlined_bytecodes()) / time.seconds(); 2133 tty->print_cr("%3d seconds: %f bytes/sec : %f (bytes %d + %d inlined)", 2134 compile_id, time.seconds(), bytes_per_sec, method->code_size(), task->num_inlined_bytecodes()); 2135 } 2136 2137 // Collect counts of successful compilations 2138 _sum_nmethod_size += code->total_size(); 2139 _sum_nmethod_code_size += code->insts_size(); 2140 _total_compile_count++; 2141 2142 if (UsePerfData) { 2143 _perf_sum_nmethod_size->inc( code->total_size()); 2144 _perf_sum_nmethod_code_size->inc(code->insts_size()); 2145 _perf_total_compile_count->inc(); 2146 } 2147 2148 if (is_osr) { 2149 if (UsePerfData) _perf_total_osr_compile_count->inc(); 2150 _total_osr_compile_count++; 2151 } else { 2152 if (UsePerfData) _perf_total_standard_compile_count->inc(); 2153 _total_standard_compile_count++; 2154 } 2155 } 2156 // set the current method for the thread to null 2157 if (UsePerfData) counters->set_current_method(""); 2158 } 2159 2160 const char* CompileBroker::compiler_name(int comp_level) { 2161 AbstractCompiler *comp = CompileBroker::compiler(comp_level); 2162 if (comp == NULL) { 2163 return "no compiler"; 2164 } else { 2165 return (comp->name()); 2166 } 2167 } 2168 2169 void CompileBroker::print_times() { 2170 tty->cr(); 2171 tty->print_cr("Accumulated compiler times (for compiled methods only)"); 2172 tty->print_cr("------------------------------------------------"); 2173 //0000000000111111111122222222223333333333444444444455555555556666666666 2174 //0123456789012345678901234567890123456789012345678901234567890123456789 2175 tty->print_cr(" Total compilation time : %6.3f s", CompileBroker::_t_total_compilation.seconds()); 2176 tty->print_cr(" Standard compilation : %6.3f s, Average : %2.3f", 2177 CompileBroker::_t_standard_compilation.seconds(), 2178 CompileBroker::_t_standard_compilation.seconds() / CompileBroker::_total_standard_compile_count); 2179 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); 2180 2181 AbstractCompiler *comp = compiler(CompLevel_simple); 2182 if (comp != NULL) { 2183 comp->print_timers(); 2184 } 2185 comp = compiler(CompLevel_full_optimization); 2186 if (comp != NULL) { 2187 comp->print_timers(); 2188 } 2189 tty->cr(); 2190 tty->print_cr(" Total compiled methods : %6d methods", CompileBroker::_total_compile_count); 2191 tty->print_cr(" Standard compilation : %6d methods", CompileBroker::_total_standard_compile_count); 2192 tty->print_cr(" On stack replacement : %6d methods", CompileBroker::_total_osr_compile_count); 2193 int tcb = CompileBroker::_sum_osr_bytes_compiled + CompileBroker::_sum_standard_bytes_compiled; 2194 tty->print_cr(" Total compiled bytecodes : %6d bytes", tcb); 2195 tty->print_cr(" Standard compilation : %6d bytes", CompileBroker::_sum_standard_bytes_compiled); 2196 tty->print_cr(" On stack replacement : %6d bytes", CompileBroker::_sum_osr_bytes_compiled); 2197 int bps = (int)(tcb / CompileBroker::_t_total_compilation.seconds()); 2198 tty->print_cr(" Average compilation speed: %6d bytes/s", bps); 2199 tty->cr(); 2200 tty->print_cr(" nmethod code size : %6d bytes", CompileBroker::_sum_nmethod_code_size); 2201 tty->print_cr(" nmethod total size : %6d bytes", CompileBroker::_sum_nmethod_size); 2202 } 2203 2204 // Debugging output for failure 2205 void CompileBroker::print_last_compile() { 2206 if ( _last_compile_level != CompLevel_none && 2207 compiler(_last_compile_level) != NULL && 2208 _last_method_compiled != NULL && 2209 _last_compile_type != no_compile) { 2210 if (_last_compile_type == osr_compile) { 2211 tty->print_cr("Last parse: [osr]%d+++(%d) %s", 2212 _osr_compilation_id, _last_compile_level, _last_method_compiled); 2213 } else { 2214 tty->print_cr("Last parse: %d+++(%d) %s", 2215 _compilation_id, _last_compile_level, _last_method_compiled); 2216 } 2217 } 2218 } 2219 2220 2221 void CompileBroker::print_compiler_threads_on(outputStream* st) { 2222 #ifndef PRODUCT 2223 st->print_cr("Compiler thread printing unimplemented."); 2224 st->cr(); 2225 #endif 2226 }