1 /* 2 * Copyright (c) 1999, 2015, 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 "ci/ciCallProfile.hpp" 27 #include "ci/ciExceptionHandler.hpp" 28 #include "ci/ciInstanceKlass.hpp" 29 #include "ci/ciMethod.hpp" 30 #include "ci/ciMethodBlocks.hpp" 31 #include "ci/ciMethodData.hpp" 32 #include "ci/ciStreams.hpp" 33 #include "ci/ciSymbol.hpp" 34 #include "ci/ciReplay.hpp" 35 #include "ci/ciUtilities.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/compilerOracle.hpp" 39 #include "compiler/methodLiveness.hpp" 40 #include "interpreter/interpreter.hpp" 41 #include "interpreter/linkResolver.hpp" 42 #include "interpreter/oopMapCache.hpp" 43 #include "memory/allocation.inline.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "oops/generateOopMap.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "runtime/deoptimization.hpp" 49 #include "utilities/bitMap.inline.hpp" 50 #include "utilities/xmlstream.hpp" 51 #include "trace/tracing.hpp" 52 #ifdef COMPILER2 53 #include "ci/bcEscapeAnalyzer.hpp" 54 #include "ci/ciTypeFlow.hpp" 55 #include "oops/method.hpp" 56 #endif 57 #ifdef SHARK 58 #include "ci/ciTypeFlow.hpp" 59 #include "oops/method.hpp" 60 #endif 61 62 // ciMethod 63 // 64 // This class represents a Method* in the HotSpot virtual 65 // machine. 66 67 68 // ------------------------------------------------------------------ 69 // ciMethod::ciMethod 70 // 71 // Loaded method. 72 ciMethod::ciMethod(methodHandle h_m, ciInstanceKlass* holder) : 73 ciMetadata(h_m()), 74 _holder(holder) 75 { 76 assert(h_m() != NULL, "no null method"); 77 78 if (LogTouchedMethods) { 79 h_m()->log_touched(Thread::current()); 80 } 81 // These fields are always filled in in loaded methods. 82 _flags = ciFlags(h_m()->access_flags()); 83 84 // Easy to compute, so fill them in now. 85 _max_stack = h_m()->max_stack(); 86 _max_locals = h_m()->max_locals(); 87 _code_size = h_m()->code_size(); 88 _intrinsic_id = h_m()->intrinsic_id(); 89 _handler_count = h_m()->exception_table_length(); 90 _size_of_parameters = h_m()->size_of_parameters(); 91 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 92 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 93 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 94 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 95 _has_reserved_stack_access = h_m()->has_reserved_stack_access(); 96 // Lazy fields, filled in on demand. Require allocation. 97 _code = NULL; 98 _exception_handlers = NULL; 99 _liveness = NULL; 100 _method_blocks = NULL; 101 #if defined(COMPILER2) || defined(SHARK) 102 _flow = NULL; 103 _bcea = NULL; 104 #endif // COMPILER2 || SHARK 105 106 ciEnv *env = CURRENT_ENV; 107 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 108 // 6328518 check hotswap conditions under the right lock. 109 MutexLocker locker(Compile_lock); 110 if (Dependencies::check_evol_method(h_m()) != NULL) { 111 _is_c1_compilable = false; 112 _is_c2_compilable = false; 113 } 114 } else { 115 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 116 } 117 118 if (h_m()->method_holder()->is_linked()) { 119 _can_be_statically_bound = h_m()->can_be_statically_bound(); 120 } else { 121 // Have to use a conservative value in this case. 122 _can_be_statically_bound = false; 123 } 124 125 // Adjust the definition of this condition to be more useful: 126 // %%% take these conditions into account in vtable generation 127 if (!_can_be_statically_bound && h_m()->is_private()) 128 _can_be_statically_bound = true; 129 if (_can_be_statically_bound && h_m()->is_abstract()) 130 _can_be_statically_bound = false; 131 132 // generating _signature may allow GC and therefore move m. 133 // These fields are always filled in. 134 _name = env->get_symbol(h_m()->name()); 135 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 136 constantPoolHandle cpool = h_m()->constants(); 137 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 138 _method_data = NULL; 139 _nmethod_age = h_m()->nmethod_age(); 140 // Take a snapshot of these values, so they will be commensurate with the MDO. 141 if (ProfileInterpreter || TieredCompilation) { 142 int invcnt = h_m()->interpreter_invocation_count(); 143 // if the value overflowed report it as max int 144 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 145 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 146 } else { 147 _interpreter_invocation_count = 0; 148 _interpreter_throwout_count = 0; 149 } 150 if (_interpreter_invocation_count == 0) 151 _interpreter_invocation_count = 1; 152 _instructions_size = -1; 153 #ifdef ASSERT 154 if (ReplayCompiles) { 155 ciReplay::initialize(this); 156 } 157 #endif 158 } 159 160 161 // ------------------------------------------------------------------ 162 // ciMethod::ciMethod 163 // 164 // Unloaded method. 165 ciMethod::ciMethod(ciInstanceKlass* holder, 166 ciSymbol* name, 167 ciSymbol* signature, 168 ciInstanceKlass* accessor) : 169 ciMetadata((Metadata*)NULL), 170 _name( name), 171 _holder( holder), 172 _intrinsic_id( vmIntrinsics::_none), 173 _liveness( NULL), 174 _can_be_statically_bound(false), 175 _method_blocks( NULL), 176 _method_data( NULL) 177 #if defined(COMPILER2) || defined(SHARK) 178 , 179 _flow( NULL), 180 _bcea( NULL), 181 _instructions_size(-1) 182 #endif // COMPILER2 || SHARK 183 { 184 // Usually holder and accessor are the same type but in some cases 185 // the holder has the wrong class loader (e.g. invokedynamic call 186 // sites) so we pass the accessor. 187 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 188 } 189 190 191 // ------------------------------------------------------------------ 192 // ciMethod::load_code 193 // 194 // Load the bytecodes and exception handler table for this method. 195 void ciMethod::load_code() { 196 VM_ENTRY_MARK; 197 assert(is_loaded(), "only loaded methods have code"); 198 199 Method* me = get_Method(); 200 Arena* arena = CURRENT_THREAD_ENV->arena(); 201 202 // Load the bytecodes. 203 _code = (address)arena->Amalloc(code_size()); 204 memcpy(_code, me->code_base(), code_size()); 205 206 // Revert any breakpoint bytecodes in ci's copy 207 if (me->number_of_breakpoints() > 0) { 208 BreakpointInfo* bp = me->method_holder()->breakpoints(); 209 for (; bp != NULL; bp = bp->next()) { 210 if (bp->match(me)) { 211 code_at_put(bp->bci(), bp->orig_bytecode()); 212 } 213 } 214 } 215 216 // And load the exception table. 217 ExceptionTable exc_table(me); 218 219 // Allocate one extra spot in our list of exceptions. This 220 // last entry will be used to represent the possibility that 221 // an exception escapes the method. See ciExceptionHandlerStream 222 // for details. 223 _exception_handlers = 224 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 225 * (_handler_count + 1)); 226 if (_handler_count > 0) { 227 for (int i=0; i<_handler_count; i++) { 228 _exception_handlers[i] = new (arena) ciExceptionHandler( 229 holder(), 230 /* start */ exc_table.start_pc(i), 231 /* limit */ exc_table.end_pc(i), 232 /* goto pc */ exc_table.handler_pc(i), 233 /* cp index */ exc_table.catch_type_index(i)); 234 } 235 } 236 237 // Put an entry at the end of our list to represent the possibility 238 // of exceptional exit. 239 _exception_handlers[_handler_count] = 240 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 241 242 if (CIPrintMethodCodes) { 243 print_codes(); 244 } 245 } 246 247 248 // ------------------------------------------------------------------ 249 // ciMethod::has_linenumber_table 250 // 251 // length unknown until decompression 252 bool ciMethod::has_linenumber_table() const { 253 check_is_loaded(); 254 VM_ENTRY_MARK; 255 return get_Method()->has_linenumber_table(); 256 } 257 258 259 // ------------------------------------------------------------------ 260 // ciMethod::compressed_linenumber_table 261 u_char* ciMethod::compressed_linenumber_table() const { 262 check_is_loaded(); 263 VM_ENTRY_MARK; 264 return get_Method()->compressed_linenumber_table(); 265 } 266 267 268 // ------------------------------------------------------------------ 269 // ciMethod::line_number_from_bci 270 int ciMethod::line_number_from_bci(int bci) const { 271 check_is_loaded(); 272 VM_ENTRY_MARK; 273 return get_Method()->line_number_from_bci(bci); 274 } 275 276 277 // ------------------------------------------------------------------ 278 // ciMethod::vtable_index 279 // 280 // Get the position of this method's entry in the vtable, if any. 281 int ciMethod::vtable_index() { 282 check_is_loaded(); 283 assert(holder()->is_linked(), "must be linked"); 284 VM_ENTRY_MARK; 285 return get_Method()->vtable_index(); 286 } 287 288 289 #ifdef SHARK 290 // ------------------------------------------------------------------ 291 // ciMethod::itable_index 292 // 293 // Get the position of this method's entry in the itable, if any. 294 int ciMethod::itable_index() { 295 check_is_loaded(); 296 assert(holder()->is_linked(), "must be linked"); 297 VM_ENTRY_MARK; 298 Method* m = get_Method(); 299 if (!m->has_itable_index()) 300 return Method::nonvirtual_vtable_index; 301 return m->itable_index(); 302 } 303 #endif // SHARK 304 305 306 // ------------------------------------------------------------------ 307 // ciMethod::native_entry 308 // 309 // Get the address of this method's native code, if any. 310 address ciMethod::native_entry() { 311 check_is_loaded(); 312 assert(flags().is_native(), "must be native method"); 313 VM_ENTRY_MARK; 314 Method* method = get_Method(); 315 address entry = method->native_function(); 316 assert(entry != NULL, "must be valid entry point"); 317 return entry; 318 } 319 320 321 // ------------------------------------------------------------------ 322 // ciMethod::interpreter_entry 323 // 324 // Get the entry point for running this method in the interpreter. 325 address ciMethod::interpreter_entry() { 326 check_is_loaded(); 327 VM_ENTRY_MARK; 328 methodHandle mh(THREAD, get_Method()); 329 return Interpreter::entry_for_method(mh); 330 } 331 332 333 // ------------------------------------------------------------------ 334 // ciMethod::uses_balanced_monitors 335 // 336 // Does this method use monitors in a strict stack-disciplined manner? 337 bool ciMethod::has_balanced_monitors() { 338 check_is_loaded(); 339 if (_balanced_monitors) return true; 340 341 // Analyze the method to see if monitors are used properly. 342 VM_ENTRY_MARK; 343 methodHandle method(THREAD, get_Method()); 344 assert(method->has_monitor_bytecodes(), "should have checked this"); 345 346 // Check to see if a previous compilation computed the 347 // monitor-matching analysis. 348 if (method->guaranteed_monitor_matching()) { 349 _balanced_monitors = true; 350 return true; 351 } 352 353 { 354 EXCEPTION_MARK; 355 ResourceMark rm(THREAD); 356 GeneratePairingInfo gpi(method); 357 gpi.compute_map(CATCH); 358 if (!gpi.monitor_safe()) { 359 return false; 360 } 361 method->set_guaranteed_monitor_matching(); 362 _balanced_monitors = true; 363 } 364 return true; 365 } 366 367 368 // ------------------------------------------------------------------ 369 // ciMethod::get_flow_analysis 370 ciTypeFlow* ciMethod::get_flow_analysis() { 371 #if defined(COMPILER2) || defined(SHARK) 372 if (_flow == NULL) { 373 ciEnv* env = CURRENT_ENV; 374 _flow = new (env->arena()) ciTypeFlow(env, this); 375 _flow->do_flow(); 376 } 377 return _flow; 378 #else // COMPILER2 || SHARK 379 ShouldNotReachHere(); 380 return NULL; 381 #endif // COMPILER2 || SHARK 382 } 383 384 385 // ------------------------------------------------------------------ 386 // ciMethod::get_osr_flow_analysis 387 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 388 #if defined(COMPILER2) || defined(SHARK) 389 // OSR entry points are always place after a call bytecode of some sort 390 assert(osr_bci >= 0, "must supply valid OSR entry point"); 391 ciEnv* env = CURRENT_ENV; 392 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 393 flow->do_flow(); 394 return flow; 395 #else // COMPILER2 || SHARK 396 ShouldNotReachHere(); 397 return NULL; 398 #endif // COMPILER2 || SHARK 399 } 400 401 // ------------------------------------------------------------------ 402 // ciMethod::raw_liveness_at_bci 403 // 404 // Which local variables are live at a specific bci? 405 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 406 check_is_loaded(); 407 if (_liveness == NULL) { 408 // Create the liveness analyzer. 409 Arena* arena = CURRENT_ENV->arena(); 410 _liveness = new (arena) MethodLiveness(arena, this); 411 _liveness->compute_liveness(); 412 } 413 return _liveness->get_liveness_at(bci); 414 } 415 416 // ------------------------------------------------------------------ 417 // ciMethod::liveness_at_bci 418 // 419 // Which local variables are live at a specific bci? When debugging 420 // will return true for all locals in some cases to improve debug 421 // information. 422 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 423 MethodLivenessResult result = raw_liveness_at_bci(bci); 424 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { 425 // Keep all locals live for the user's edification and amusement. 426 result.at_put_range(0, result.size(), true); 427 } 428 return result; 429 } 430 431 // ciMethod::live_local_oops_at_bci 432 // 433 // find all the live oops in the locals array for a particular bci 434 // Compute what the interpreter believes by using the interpreter 435 // oopmap generator. This is used as a double check during osr to 436 // guard against conservative result from MethodLiveness making us 437 // think a dead oop is live. MethodLiveness is conservative in the 438 // sense that it may consider locals to be live which cannot be live, 439 // like in the case where a local could contain an oop or a primitive 440 // along different paths. In that case the local must be dead when 441 // those paths merge. Since the interpreter's viewpoint is used when 442 // gc'ing an interpreter frame we need to use its viewpoint during 443 // OSR when loading the locals. 444 445 BitMap ciMethod::live_local_oops_at_bci(int bci) { 446 VM_ENTRY_MARK; 447 InterpreterOopMap mask; 448 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 449 int mask_size = max_locals(); 450 BitMap result(mask_size); 451 result.clear(); 452 int i; 453 for (i = 0; i < mask_size ; i++ ) { 454 if (mask.is_oop(i)) result.set_bit(i); 455 } 456 return result; 457 } 458 459 460 #ifdef COMPILER1 461 // ------------------------------------------------------------------ 462 // ciMethod::bci_block_start 463 // 464 // Marks all bcis where a new basic block starts 465 const BitMap ciMethod::bci_block_start() { 466 check_is_loaded(); 467 if (_liveness == NULL) { 468 // Create the liveness analyzer. 469 Arena* arena = CURRENT_ENV->arena(); 470 _liveness = new (arena) MethodLiveness(arena, this); 471 _liveness->compute_liveness(); 472 } 473 474 return _liveness->get_bci_block_start(); 475 } 476 #endif // COMPILER1 477 478 479 // ------------------------------------------------------------------ 480 // ciMethod::call_profile_at_bci 481 // 482 // Get the ciCallProfile for the invocation of this method. 483 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 484 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 485 ResourceMark rm; 486 ciCallProfile result; 487 if (method_data() != NULL && method_data()->is_mature()) { 488 ciProfileData* data = method_data()->bci_to_data(bci); 489 if (data != NULL && data->is_CounterData()) { 490 // Every profiled call site has a counter. 491 int count = data->as_CounterData()->count(); 492 493 if (!data->is_ReceiverTypeData()) { 494 result._receiver_count[0] = 0; // that's a definite zero 495 } else { // ReceiverTypeData is a subclass of CounterData 496 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 497 // In addition, virtual call sites have receiver type information 498 int receivers_count_total = 0; 499 int morphism = 0; 500 // Precompute morphism for the possible fixup 501 for (uint i = 0; i < call->row_limit(); i++) { 502 ciKlass* receiver = call->receiver(i); 503 if (receiver == NULL) continue; 504 morphism++; 505 } 506 int epsilon = 0; 507 if (TieredCompilation && ProfileInterpreter) { 508 // Interpreter and C1 treat final and special invokes differently. 509 // C1 will record a type, whereas the interpreter will just 510 // increment the count. Detect this case. 511 if (morphism == 1 && count > 0) { 512 epsilon = count; 513 count = 0; 514 } 515 } 516 for (uint i = 0; i < call->row_limit(); i++) { 517 ciKlass* receiver = call->receiver(i); 518 if (receiver == NULL) continue; 519 int rcount = call->receiver_count(i) + epsilon; 520 if (rcount == 0) rcount = 1; // Should be valid value 521 receivers_count_total += rcount; 522 // Add the receiver to result data. 523 result.add_receiver(receiver, rcount); 524 // If we extend profiling to record methods, 525 // we will set result._method also. 526 } 527 // Determine call site's morphism. 528 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 529 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 530 // The call site count is > 0 in the case of a polymorphic virtual call. 531 if (morphism > 0 && morphism == result._limit) { 532 // The morphism <= MorphismLimit. 533 if ((morphism < ciCallProfile::MorphismLimit) || 534 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 535 #ifdef ASSERT 536 if (count > 0) { 537 this->print_short_name(tty); 538 tty->print_cr(" @ bci:%d", bci); 539 this->print_codes(); 540 assert(false, "this call site should not be polymorphic"); 541 } 542 #endif 543 result._morphism = morphism; 544 } 545 } 546 // Make the count consistent if this is a call profile. If count is 547 // zero or less, presume that this is a typecheck profile and 548 // do nothing. Otherwise, increase count to be the sum of all 549 // receiver's counts. 550 if (count >= 0) { 551 count += receivers_count_total; 552 } 553 } 554 result._count = count; 555 } 556 } 557 return result; 558 } 559 560 // ------------------------------------------------------------------ 561 // Add new receiver and sort data by receiver's profile count. 562 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 563 // Add new receiver and sort data by receiver's counts when we have space 564 // for it otherwise replace the less called receiver (less called receiver 565 // is placed to the last array element which is not used). 566 // First array's element contains most called receiver. 567 int i = _limit; 568 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 569 _receiver[i] = _receiver[i-1]; 570 _receiver_count[i] = _receiver_count[i-1]; 571 } 572 _receiver[i] = receiver; 573 _receiver_count[i] = receiver_count; 574 if (_limit < MorphismLimit) _limit++; 575 } 576 577 578 void ciMethod::assert_virtual_call_type_ok(int bci) { 579 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 580 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 581 } 582 583 void ciMethod::assert_call_type_ok(int bci) { 584 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 585 java_code_at_bci(bci) == Bytecodes::_invokespecial || 586 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 587 } 588 589 /** 590 * Check whether profiling provides a type for the argument i to the 591 * call at bci bci 592 * 593 * @param [in]bci bci of the call 594 * @param [in]i argument number 595 * @param [out]type profiled type of argument, NULL if none 596 * @param [out]maybe_null true if null was seen for argument 597 * @return true if profiling exists 598 * 599 */ 600 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) { 601 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 602 ciProfileData* data = method_data()->bci_to_data(bci); 603 if (data != NULL) { 604 if (data->is_VirtualCallTypeData()) { 605 assert_virtual_call_type_ok(bci); 606 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 607 if (i >= call->number_of_arguments()) { 608 return false; 609 } 610 type = call->valid_argument_type(i); 611 maybe_null = call->argument_maybe_null(i); 612 return true; 613 } else if (data->is_CallTypeData()) { 614 assert_call_type_ok(bci); 615 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 616 if (i >= call->number_of_arguments()) { 617 return false; 618 } 619 type = call->valid_argument_type(i); 620 maybe_null = call->argument_maybe_null(i); 621 return true; 622 } 623 } 624 } 625 return false; 626 } 627 628 /** 629 * Check whether profiling provides a type for the return value from 630 * the call at bci bci 631 * 632 * @param [in]bci bci of the call 633 * @param [out]type profiled type of argument, NULL if none 634 * @param [out]maybe_null true if null was seen for argument 635 * @return true if profiling exists 636 * 637 */ 638 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) { 639 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 640 ciProfileData* data = method_data()->bci_to_data(bci); 641 if (data != NULL) { 642 if (data->is_VirtualCallTypeData()) { 643 assert_virtual_call_type_ok(bci); 644 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 645 type = call->valid_return_type(); 646 maybe_null = call->return_maybe_null(); 647 return true; 648 } else if (data->is_CallTypeData()) { 649 assert_call_type_ok(bci); 650 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 651 type = call->valid_return_type(); 652 maybe_null = call->return_maybe_null(); 653 return true; 654 } 655 } 656 } 657 return false; 658 } 659 660 /** 661 * Check whether profiling provides a type for the parameter i 662 * 663 * @param [in]i parameter number 664 * @param [out]type profiled type of parameter, NULL if none 665 * @param [out]maybe_null true if null was seen for parameter 666 * @return true if profiling exists 667 * 668 */ 669 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) { 670 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 671 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 672 if (parameters != NULL && i < parameters->number_of_parameters()) { 673 type = parameters->valid_parameter_type(i); 674 maybe_null = parameters->parameter_maybe_null(i); 675 return true; 676 } 677 } 678 return false; 679 } 680 681 682 // ------------------------------------------------------------------ 683 // ciMethod::find_monomorphic_target 684 // 685 // Given a certain calling environment, find the monomorphic target 686 // for the call. Return NULL if the call is not monomorphic in 687 // its calling environment, or if there are only abstract methods. 688 // The returned method is never abstract. 689 // Note: If caller uses a non-null result, it must inform dependencies 690 // via assert_unique_concrete_method or assert_leaf_type. 691 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 692 ciInstanceKlass* callee_holder, 693 ciInstanceKlass* actual_recv, 694 bool check_access) { 695 check_is_loaded(); 696 697 if (actual_recv->is_interface()) { 698 // %%% We cannot trust interface types, yet. See bug 6312651. 699 return NULL; 700 } 701 702 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 703 if (root_m == NULL) { 704 // Something went wrong looking up the actual receiver method. 705 return NULL; 706 } 707 assert(!root_m->is_abstract(), "resolve_invoke promise"); 708 709 // Make certain quick checks even if UseCHA is false. 710 711 // Is it private or final? 712 if (root_m->can_be_statically_bound()) { 713 return root_m; 714 } 715 716 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 717 // Easy case. There is no other place to put a method, so don't bother 718 // to go through the VM_ENTRY_MARK and all the rest. 719 return root_m; 720 } 721 722 // Array methods (clone, hashCode, etc.) are always statically bound. 723 // If we were to see an array type here, we'd return root_m. 724 // However, this method processes only ciInstanceKlasses. (See 4962591.) 725 // The inline_native_clone intrinsic narrows Object to T[] properly, 726 // so there is no need to do the same job here. 727 728 if (!UseCHA) return NULL; 729 730 VM_ENTRY_MARK; 731 732 // Disable CHA for default methods for now 733 if (root_m->get_Method()->is_default_method()) { 734 return NULL; 735 } 736 737 methodHandle target; 738 { 739 MutexLocker locker(Compile_lock); 740 Klass* context = actual_recv->get_Klass(); 741 target = Dependencies::find_unique_concrete_method(context, 742 root_m->get_Method()); 743 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 744 } 745 746 #ifndef PRODUCT 747 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 748 tty->print("found a non-root unique target method"); 749 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); 750 tty->print(" method = "); 751 target->print_short_name(tty); 752 tty->cr(); 753 } 754 #endif //PRODUCT 755 756 if (target() == NULL) { 757 return NULL; 758 } 759 if (target() == root_m->get_Method()) { 760 return root_m; 761 } 762 if (!root_m->is_public() && 763 !root_m->is_protected()) { 764 // If we are going to reason about inheritance, it's easiest 765 // if the method in question is public, protected, or private. 766 // If the answer is not root_m, it is conservatively correct 767 // to return NULL, even if the CHA encountered irrelevant 768 // methods in other packages. 769 // %%% TO DO: Work out logic for package-private methods 770 // with the same name but different vtable indexes. 771 return NULL; 772 } 773 return CURRENT_THREAD_ENV->get_method(target()); 774 } 775 776 // ------------------------------------------------------------------ 777 // ciMethod::resolve_invoke 778 // 779 // Given a known receiver klass, find the target for the call. 780 // Return NULL if the call has no target or the target is abstract. 781 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 782 check_is_loaded(); 783 VM_ENTRY_MARK; 784 785 KlassHandle caller_klass (THREAD, caller->get_Klass()); 786 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 787 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 788 Symbol* h_name = name()->get_symbol(); 789 Symbol* h_signature = signature()->get_symbol(); 790 791 LinkInfo link_info(h_resolved, h_name, h_signature, caller_klass, check_access); 792 methodHandle m; 793 // Only do exact lookup if receiver klass has been linked. Otherwise, 794 // the vtable has not been setup, and the LinkResolver will fail. 795 if (h_recv->oop_is_array() 796 || 797 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 798 if (holder()->is_interface()) { 799 m = LinkResolver::resolve_interface_call_or_null(h_recv, link_info); 800 } else { 801 m = LinkResolver::resolve_virtual_call_or_null(h_recv, link_info); 802 } 803 } 804 805 if (m.is_null()) { 806 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 807 return NULL; 808 } 809 810 ciMethod* result = this; 811 if (m() != get_Method()) { 812 result = CURRENT_THREAD_ENV->get_method(m()); 813 } 814 815 // Don't return abstract methods because they aren't 816 // optimizable or interesting. 817 if (result->is_abstract()) { 818 return NULL; 819 } else { 820 return result; 821 } 822 } 823 824 // ------------------------------------------------------------------ 825 // ciMethod::resolve_vtable_index 826 // 827 // Given a known receiver klass, find the vtable index for the call. 828 // Return Method::invalid_vtable_index if the vtable_index is unknown. 829 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 830 check_is_loaded(); 831 832 int vtable_index = Method::invalid_vtable_index; 833 // Only do lookup if receiver klass has been linked. Otherwise, 834 // the vtable has not been setup, and the LinkResolver will fail. 835 if (!receiver->is_interface() 836 && (!receiver->is_instance_klass() || 837 receiver->as_instance_klass()->is_linked())) { 838 VM_ENTRY_MARK; 839 840 KlassHandle caller_klass (THREAD, caller->get_Klass()); 841 KlassHandle h_recv (THREAD, receiver->get_Klass()); 842 Symbol* h_name = name()->get_symbol(); 843 Symbol* h_signature = signature()->get_symbol(); 844 845 LinkInfo link_info(h_recv, h_name, h_signature, caller_klass); 846 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, link_info); 847 if (vtable_index == Method::nonvirtual_vtable_index) { 848 // A statically bound method. Return "no such index". 849 vtable_index = Method::invalid_vtable_index; 850 } 851 } 852 853 return vtable_index; 854 } 855 856 // ------------------------------------------------------------------ 857 // ciMethod::interpreter_call_site_count 858 int ciMethod::interpreter_call_site_count(int bci) { 859 if (method_data() != NULL) { 860 ResourceMark rm; 861 ciProfileData* data = method_data()->bci_to_data(bci); 862 if (data != NULL && data->is_CounterData()) { 863 return scale_count(data->as_CounterData()->count()); 864 } 865 } 866 return -1; // unknown 867 } 868 869 // ------------------------------------------------------------------ 870 // ciMethod::get_field_at_bci 871 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 872 ciBytecodeStream iter(this); 873 iter.reset_to_bci(bci); 874 iter.next(); 875 return iter.get_field(will_link); 876 } 877 878 // ------------------------------------------------------------------ 879 // ciMethod::get_method_at_bci 880 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 881 ciBytecodeStream iter(this); 882 iter.reset_to_bci(bci); 883 iter.next(); 884 return iter.get_method(will_link, declared_signature); 885 } 886 887 // ------------------------------------------------------------------ 888 // Adjust a CounterData count to be commensurate with 889 // interpreter_invocation_count. If the MDO exists for 890 // only 25% of the time the method exists, then the 891 // counts in the MDO should be scaled by 4X, so that 892 // they can be usefully and stably compared against the 893 // invocation counts in methods. 894 int ciMethod::scale_count(int count, float prof_factor) { 895 if (count > 0 && method_data() != NULL) { 896 int counter_life; 897 int method_life = interpreter_invocation_count(); 898 if (TieredCompilation) { 899 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 900 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 901 } else { 902 int current_mileage = method_data()->current_mileage(); 903 int creation_mileage = method_data()->creation_mileage(); 904 counter_life = current_mileage - creation_mileage; 905 } 906 907 // counter_life due to backedge_counter could be > method_life 908 if (counter_life > method_life) 909 counter_life = method_life; 910 if (0 < counter_life && counter_life <= method_life) { 911 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 912 count = (count > 0) ? count : 1; 913 } 914 } 915 return count; 916 } 917 918 919 // ------------------------------------------------------------------ 920 // ciMethod::is_special_get_caller_class_method 921 // 922 bool ciMethod::is_ignored_by_security_stack_walk() const { 923 check_is_loaded(); 924 VM_ENTRY_MARK; 925 return get_Method()->is_ignored_by_security_stack_walk(); 926 } 927 928 929 // ------------------------------------------------------------------ 930 // invokedynamic support 931 932 // ------------------------------------------------------------------ 933 // ciMethod::is_method_handle_intrinsic 934 // 935 // Return true if the method is an instance of the JVM-generated 936 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 937 bool ciMethod::is_method_handle_intrinsic() const { 938 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 939 return (MethodHandles::is_signature_polymorphic(iid) && 940 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 941 } 942 943 // ------------------------------------------------------------------ 944 // ciMethod::is_compiled_lambda_form 945 // 946 // Return true if the method is a generated MethodHandle adapter. 947 // These are built by Java code. 948 bool ciMethod::is_compiled_lambda_form() const { 949 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 950 return iid == vmIntrinsics::_compiledLambdaForm; 951 } 952 953 // ------------------------------------------------------------------ 954 // ciMethod::has_member_arg 955 // 956 // Return true if the method is a linker intrinsic like _linkToVirtual. 957 // These are built by the JVM. 958 bool ciMethod::has_member_arg() const { 959 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 960 return (MethodHandles::is_signature_polymorphic(iid) && 961 MethodHandles::has_member_arg(iid)); 962 } 963 964 // ------------------------------------------------------------------ 965 // ciMethod::ensure_method_data 966 // 967 // Generate new MethodData* objects at compile time. 968 // Return true if allocation was successful or no MDO is required. 969 bool ciMethod::ensure_method_data(methodHandle h_m) { 970 EXCEPTION_CONTEXT; 971 if (is_native() || is_abstract() || h_m()->is_accessor()) { 972 return true; 973 } 974 if (h_m()->method_data() == NULL) { 975 Method::build_interpreter_method_data(h_m, THREAD); 976 if (HAS_PENDING_EXCEPTION) { 977 CLEAR_PENDING_EXCEPTION; 978 } 979 } 980 if (h_m()->method_data() != NULL) { 981 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 982 _method_data->load_data(); 983 return true; 984 } else { 985 _method_data = CURRENT_ENV->get_empty_methodData(); 986 return false; 987 } 988 } 989 990 // public, retroactive version 991 bool ciMethod::ensure_method_data() { 992 bool result = true; 993 if (_method_data == NULL || _method_data->is_empty()) { 994 GUARDED_VM_ENTRY({ 995 result = ensure_method_data(get_Method()); 996 }); 997 } 998 return result; 999 } 1000 1001 1002 // ------------------------------------------------------------------ 1003 // ciMethod::method_data 1004 // 1005 ciMethodData* ciMethod::method_data() { 1006 if (_method_data != NULL) { 1007 return _method_data; 1008 } 1009 VM_ENTRY_MARK; 1010 ciEnv* env = CURRENT_ENV; 1011 Thread* my_thread = JavaThread::current(); 1012 methodHandle h_m(my_thread, get_Method()); 1013 1014 if (h_m()->method_data() != NULL) { 1015 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1016 _method_data->load_data(); 1017 } else { 1018 _method_data = CURRENT_ENV->get_empty_methodData(); 1019 } 1020 return _method_data; 1021 1022 } 1023 1024 // ------------------------------------------------------------------ 1025 // ciMethod::method_data_or_null 1026 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1027 // NULL otherwise. 1028 ciMethodData* ciMethod::method_data_or_null() { 1029 ciMethodData *md = method_data(); 1030 if (md->is_empty()) { 1031 return NULL; 1032 } 1033 return md; 1034 } 1035 1036 // ------------------------------------------------------------------ 1037 // ciMethod::ensure_method_counters 1038 // 1039 MethodCounters* ciMethod::ensure_method_counters() { 1040 check_is_loaded(); 1041 VM_ENTRY_MARK; 1042 methodHandle mh(THREAD, get_Method()); 1043 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1044 return method_counters; 1045 } 1046 1047 // ------------------------------------------------------------------ 1048 // ciMethod::should_inline 1049 // 1050 // Should this method be inlined during compilation? 1051 bool ciMethod::should_inline() { 1052 check_is_loaded(); 1053 VM_ENTRY_MARK; 1054 methodHandle mh(THREAD, get_Method()); 1055 return CompilerOracle::should_inline(mh); 1056 } 1057 1058 // ------------------------------------------------------------------ 1059 // ciMethod::should_not_inline 1060 // 1061 // Should this method be disallowed from inlining during compilation? 1062 bool ciMethod::should_not_inline() { 1063 check_is_loaded(); 1064 VM_ENTRY_MARK; 1065 methodHandle mh(THREAD, get_Method()); 1066 return CompilerOracle::should_not_inline(mh); 1067 } 1068 1069 // ------------------------------------------------------------------ 1070 // ciMethod::should_print_assembly 1071 // 1072 // Should the compiler print the generated code for this method? 1073 bool ciMethod::should_print_assembly() { 1074 check_is_loaded(); 1075 VM_ENTRY_MARK; 1076 methodHandle mh(THREAD, get_Method()); 1077 return CompilerOracle::should_print(mh); 1078 } 1079 1080 // ------------------------------------------------------------------ 1081 // ciMethod::break_at_execute 1082 // 1083 // Should the compiler insert a breakpoint into the generated code 1084 // method? 1085 bool ciMethod::break_at_execute() { 1086 check_is_loaded(); 1087 VM_ENTRY_MARK; 1088 methodHandle mh(THREAD, get_Method()); 1089 return CompilerOracle::should_break_at(mh); 1090 } 1091 1092 // ------------------------------------------------------------------ 1093 // ciMethod::has_option 1094 // 1095 bool ciMethod::has_option(const char* option) { 1096 check_is_loaded(); 1097 VM_ENTRY_MARK; 1098 methodHandle mh(THREAD, get_Method()); 1099 return CompilerOracle::has_option_string(mh, option); 1100 } 1101 1102 // ------------------------------------------------------------------ 1103 // ciMethod::has_option_value 1104 // 1105 template<typename T> 1106 bool ciMethod::has_option_value(const char* option, T& value) { 1107 check_is_loaded(); 1108 VM_ENTRY_MARK; 1109 methodHandle mh(THREAD, get_Method()); 1110 return CompilerOracle::has_option_value(mh, option, value); 1111 } 1112 // Explicit instantiation for all OptionTypes supported. 1113 template bool ciMethod::has_option_value<intx>(const char* option, intx& value); 1114 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value); 1115 template bool ciMethod::has_option_value<bool>(const char* option, bool& value); 1116 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value); 1117 template bool ciMethod::has_option_value<double>(const char* option, double& value); 1118 1119 // ------------------------------------------------------------------ 1120 // ciMethod::can_be_compiled 1121 // 1122 // Have previous compilations of this method succeeded? 1123 bool ciMethod::can_be_compiled() { 1124 check_is_loaded(); 1125 ciEnv* env = CURRENT_ENV; 1126 if (is_c1_compile(env->comp_level())) { 1127 return _is_c1_compilable; 1128 } 1129 return _is_c2_compilable; 1130 } 1131 1132 // ------------------------------------------------------------------ 1133 // ciMethod::set_not_compilable 1134 // 1135 // Tell the VM that this method cannot be compiled at all. 1136 void ciMethod::set_not_compilable(const char* reason) { 1137 check_is_loaded(); 1138 VM_ENTRY_MARK; 1139 ciEnv* env = CURRENT_ENV; 1140 if (is_c1_compile(env->comp_level())) { 1141 _is_c1_compilable = false; 1142 } else { 1143 _is_c2_compilable = false; 1144 } 1145 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1146 } 1147 1148 // ------------------------------------------------------------------ 1149 // ciMethod::can_be_osr_compiled 1150 // 1151 // Have previous compilations of this method succeeded? 1152 // 1153 // Implementation note: the VM does not currently keep track 1154 // of failed OSR compilations per bci. The entry_bci parameter 1155 // is currently unused. 1156 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1157 check_is_loaded(); 1158 VM_ENTRY_MARK; 1159 ciEnv* env = CURRENT_ENV; 1160 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1161 } 1162 1163 // ------------------------------------------------------------------ 1164 // ciMethod::has_compiled_code 1165 bool ciMethod::has_compiled_code() { 1166 return instructions_size() > 0; 1167 } 1168 1169 int ciMethod::comp_level() { 1170 check_is_loaded(); 1171 VM_ENTRY_MARK; 1172 nmethod* nm = get_Method()->code(); 1173 if (nm != NULL) return nm->comp_level(); 1174 return 0; 1175 } 1176 1177 int ciMethod::highest_osr_comp_level() { 1178 check_is_loaded(); 1179 VM_ENTRY_MARK; 1180 return get_Method()->highest_osr_comp_level(); 1181 } 1182 1183 // ------------------------------------------------------------------ 1184 // ciMethod::code_size_for_inlining 1185 // 1186 // Code size for inlining decisions. This method returns a code 1187 // size of 1 for methods which has the ForceInline annotation. 1188 int ciMethod::code_size_for_inlining() { 1189 check_is_loaded(); 1190 if (get_Method()->force_inline()) { 1191 return 1; 1192 } 1193 return code_size(); 1194 } 1195 1196 // ------------------------------------------------------------------ 1197 // ciMethod::instructions_size 1198 // 1199 // This is a rough metric for "fat" methods, compared before inlining 1200 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1201 // junk like exception handler, stubs, and constant table, which are 1202 // not highly relevant to an inlined method. So we use the more 1203 // specific accessor nmethod::insts_size. 1204 int ciMethod::instructions_size() { 1205 if (_instructions_size == -1) { 1206 GUARDED_VM_ENTRY( 1207 nmethod* code = get_Method()->code(); 1208 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1209 _instructions_size = code->insts_end() - code->verified_entry_point(); 1210 } else { 1211 _instructions_size = 0; 1212 } 1213 ); 1214 } 1215 return _instructions_size; 1216 } 1217 1218 // ------------------------------------------------------------------ 1219 // ciMethod::log_nmethod_identity 1220 void ciMethod::log_nmethod_identity(xmlStream* log) { 1221 GUARDED_VM_ENTRY( 1222 nmethod* code = get_Method()->code(); 1223 if (code != NULL) { 1224 code->log_identity(log); 1225 } 1226 ) 1227 } 1228 1229 // ------------------------------------------------------------------ 1230 // ciMethod::is_not_reached 1231 bool ciMethod::is_not_reached(int bci) { 1232 check_is_loaded(); 1233 VM_ENTRY_MARK; 1234 return Interpreter::is_not_reached( 1235 methodHandle(THREAD, get_Method()), bci); 1236 } 1237 1238 // ------------------------------------------------------------------ 1239 // ciMethod::was_never_executed 1240 bool ciMethod::was_executed_more_than(int times) { 1241 VM_ENTRY_MARK; 1242 return get_Method()->was_executed_more_than(times); 1243 } 1244 1245 // ------------------------------------------------------------------ 1246 // ciMethod::has_unloaded_classes_in_signature 1247 bool ciMethod::has_unloaded_classes_in_signature() { 1248 VM_ENTRY_MARK; 1249 { 1250 EXCEPTION_MARK; 1251 methodHandle m(THREAD, get_Method()); 1252 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1253 if( HAS_PENDING_EXCEPTION ) { 1254 CLEAR_PENDING_EXCEPTION; 1255 return true; // Declare that we may have unloaded classes 1256 } 1257 return has_unloaded; 1258 } 1259 } 1260 1261 // ------------------------------------------------------------------ 1262 // ciMethod::is_klass_loaded 1263 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1264 VM_ENTRY_MARK; 1265 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1266 } 1267 1268 // ------------------------------------------------------------------ 1269 // ciMethod::check_call 1270 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1271 // This method is used only in C2 from InlineTree::ok_to_inline, 1272 // and is only used under -Xcomp or -XX:CompileTheWorld. 1273 // It appears to fail when applied to an invokeinterface call site. 1274 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1275 VM_ENTRY_MARK; 1276 { 1277 EXCEPTION_MARK; 1278 HandleMark hm(THREAD); 1279 constantPoolHandle pool (THREAD, get_Method()->constants()); 1280 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1281 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1282 if (HAS_PENDING_EXCEPTION) { 1283 CLEAR_PENDING_EXCEPTION; 1284 return false; 1285 } else { 1286 return (spec_method->is_static() == is_static); 1287 } 1288 } 1289 return false; 1290 } 1291 1292 // ------------------------------------------------------------------ 1293 // ciMethod::profile_aging 1294 // 1295 // Should the method be compiled with an age counter? 1296 bool ciMethod::profile_aging() const { 1297 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1298 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1299 } 1300 // ------------------------------------------------------------------ 1301 // ciMethod::print_codes 1302 // 1303 // Print the bytecodes for this method. 1304 void ciMethod::print_codes_on(outputStream* st) { 1305 check_is_loaded(); 1306 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1307 } 1308 1309 1310 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1311 check_is_loaded(); \ 1312 VM_ENTRY_MARK; \ 1313 return get_Method()->flag_accessor(); \ 1314 } 1315 1316 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1317 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1318 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1319 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1320 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1321 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1322 1323 bool ciMethod::is_boxing_method() const { 1324 if (holder()->is_box_klass()) { 1325 switch (intrinsic_id()) { 1326 case vmIntrinsics::_Boolean_valueOf: 1327 case vmIntrinsics::_Byte_valueOf: 1328 case vmIntrinsics::_Character_valueOf: 1329 case vmIntrinsics::_Short_valueOf: 1330 case vmIntrinsics::_Integer_valueOf: 1331 case vmIntrinsics::_Long_valueOf: 1332 case vmIntrinsics::_Float_valueOf: 1333 case vmIntrinsics::_Double_valueOf: 1334 return true; 1335 default: 1336 return false; 1337 } 1338 } 1339 return false; 1340 } 1341 1342 bool ciMethod::is_unboxing_method() const { 1343 if (holder()->is_box_klass()) { 1344 switch (intrinsic_id()) { 1345 case vmIntrinsics::_booleanValue: 1346 case vmIntrinsics::_byteValue: 1347 case vmIntrinsics::_charValue: 1348 case vmIntrinsics::_shortValue: 1349 case vmIntrinsics::_intValue: 1350 case vmIntrinsics::_longValue: 1351 case vmIntrinsics::_floatValue: 1352 case vmIntrinsics::_doubleValue: 1353 return true; 1354 default: 1355 return false; 1356 } 1357 } 1358 return false; 1359 } 1360 1361 BCEscapeAnalyzer *ciMethod::get_bcea() { 1362 #ifdef COMPILER2 1363 if (_bcea == NULL) { 1364 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1365 } 1366 return _bcea; 1367 #else // COMPILER2 1368 ShouldNotReachHere(); 1369 return NULL; 1370 #endif // COMPILER2 1371 } 1372 1373 ciMethodBlocks *ciMethod::get_method_blocks() { 1374 Arena *arena = CURRENT_ENV->arena(); 1375 if (_method_blocks == NULL) { 1376 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1377 } 1378 return _method_blocks; 1379 } 1380 1381 #undef FETCH_FLAG_FROM_VM 1382 1383 void ciMethod::dump_name_as_ascii(outputStream* st) { 1384 Method* method = get_Method(); 1385 st->print("%s %s %s", 1386 method->klass_name()->as_quoted_ascii(), 1387 method->name()->as_quoted_ascii(), 1388 method->signature()->as_quoted_ascii()); 1389 } 1390 1391 void ciMethod::dump_replay_data(outputStream* st) { 1392 ResourceMark rm; 1393 Method* method = get_Method(); 1394 MethodCounters* mcs = method->method_counters(); 1395 st->print("ciMethod "); 1396 dump_name_as_ascii(st); 1397 st->print_cr(" %d %d %d %d %d", 1398 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1399 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1400 interpreter_invocation_count(), 1401 interpreter_throwout_count(), 1402 _instructions_size); 1403 } 1404 1405 // ------------------------------------------------------------------ 1406 // ciMethod::print_codes 1407 // 1408 // Print a range of the bytecodes for this method. 1409 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1410 check_is_loaded(); 1411 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1412 } 1413 1414 // ------------------------------------------------------------------ 1415 // ciMethod::print_name 1416 // 1417 // Print the name of this method, including signature and some flags. 1418 void ciMethod::print_name(outputStream* st) { 1419 check_is_loaded(); 1420 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1421 } 1422 1423 // ------------------------------------------------------------------ 1424 // ciMethod::print_short_name 1425 // 1426 // Print the name of this method, without signature. 1427 void ciMethod::print_short_name(outputStream* st) { 1428 if (is_loaded()) { 1429 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1430 } else { 1431 // Fall back if method is not loaded. 1432 holder()->print_name_on(st); 1433 st->print("::"); 1434 name()->print_symbol_on(st); 1435 if (WizardMode) 1436 signature()->as_symbol()->print_symbol_on(st); 1437 } 1438 } 1439 1440 // ------------------------------------------------------------------ 1441 // ciMethod::print_impl 1442 // 1443 // Implementation of the print method. 1444 void ciMethod::print_impl(outputStream* st) { 1445 ciMetadata::print_impl(st); 1446 st->print(" name="); 1447 name()->print_symbol_on(st); 1448 st->print(" holder="); 1449 holder()->print_name_on(st); 1450 st->print(" signature="); 1451 signature()->as_symbol()->print_symbol_on(st); 1452 if (is_loaded()) { 1453 st->print(" loaded=true"); 1454 st->print(" arg_size=%d", arg_size()); 1455 st->print(" flags="); 1456 flags().print_member_flags(st); 1457 } else { 1458 st->print(" loaded=false"); 1459 } 1460 } 1461 1462 #if INCLUDE_TRACE 1463 TraceStructCiMethod ciMethod::to_trace_struct() const { 1464 TraceStructCiMethod result; 1465 result.set_class(holder()->name()->as_utf8()); 1466 result.set_name(name()->as_utf8()); 1467 result.set_signature(signature()->as_symbol()->as_utf8()); 1468 return result; 1469 } 1470 #endif