1 /* 2 * Copyright (c) 1999, 2019, 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.inline.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/methodLiveness.hpp" 39 #include "interpreter/interpreter.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "interpreter/oopMapCache.hpp" 42 #include "memory/allocation.inline.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "oops/generateOopMap.hpp" 45 #include "oops/method.inline.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "runtime/deoptimization.hpp" 49 #include "runtime/handles.inline.hpp" 50 #include "utilities/bitMap.inline.hpp" 51 #include "utilities/xmlstream.hpp" 52 #ifdef COMPILER2 53 #include "ci/bcEscapeAnalyzer.hpp" 54 #include "ci/ciTypeFlow.hpp" 55 #include "oops/method.hpp" 56 #endif 57 58 // ciMethod 59 // 60 // This class represents a Method* in the HotSpot virtual 61 // machine. 62 63 64 // ------------------------------------------------------------------ 65 // ciMethod::ciMethod 66 // 67 // Loaded method. 68 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 69 ciMetadata(h_m()), 70 _holder(holder) 71 { 72 assert(h_m() != NULL, "no null method"); 73 74 if (LogTouchedMethods) { 75 h_m()->log_touched(Thread::current()); 76 } 77 // These fields are always filled in in loaded methods. 78 _flags = ciFlags(h_m()->access_flags()); 79 80 // Easy to compute, so fill them in now. 81 _max_stack = h_m()->max_stack(); 82 _max_locals = h_m()->max_locals(); 83 _code_size = h_m()->code_size(); 84 _intrinsic_id = h_m()->intrinsic_id(); 85 _handler_count = h_m()->exception_table_length(); 86 _size_of_parameters = h_m()->size_of_parameters(); 87 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 88 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 89 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 90 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 91 _can_be_parsed = true; 92 _has_reserved_stack_access = h_m()->has_reserved_stack_access(); 93 _is_overpass = h_m()->is_overpass(); 94 // Lazy fields, filled in on demand. Require allocation. 95 _code = NULL; 96 _exception_handlers = NULL; 97 _liveness = NULL; 98 _method_blocks = NULL; 99 #if defined(COMPILER2) 100 _flow = NULL; 101 _bcea = NULL; 102 #endif // COMPILER2 103 104 ciEnv *env = CURRENT_ENV; 105 if (env->jvmti_can_hotswap_or_post_breakpoint()) { 106 // 6328518 check hotswap conditions under the right lock. 107 MutexLocker locker(Compile_lock); 108 if (Dependencies::check_evol_method(h_m()) != NULL) { 109 _is_c1_compilable = false; 110 _is_c2_compilable = false; 111 _can_be_parsed = false; 112 } 113 } else { 114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 115 } 116 117 if (h_m()->method_holder()->is_linked()) { 118 _can_be_statically_bound = h_m()->can_be_statically_bound(); 119 } else { 120 // Have to use a conservative value in this case. 121 _can_be_statically_bound = false; 122 } 123 124 // Adjust the definition of this condition to be more useful: 125 // %%% take these conditions into account in vtable generation 126 if (!_can_be_statically_bound && h_m()->is_private()) 127 _can_be_statically_bound = true; 128 if (_can_be_statically_bound && h_m()->is_abstract()) 129 _can_be_statically_bound = false; 130 131 // generating _signature may allow GC and therefore move m. 132 // These fields are always filled in. 133 _name = env->get_symbol(h_m()->name()); 134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 135 constantPoolHandle cpool = h_m()->constants(); 136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 137 _method_data = NULL; 138 _nmethod_age = h_m()->nmethod_age(); 139 // Take a snapshot of these values, so they will be commensurate with the MDO. 140 if (ProfileInterpreter || TieredCompilation) { 141 int invcnt = h_m()->interpreter_invocation_count(); 142 // if the value overflowed report it as max int 143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 144 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 145 } else { 146 _interpreter_invocation_count = 0; 147 _interpreter_throwout_count = 0; 148 } 149 if (_interpreter_invocation_count == 0) 150 _interpreter_invocation_count = 1; 151 _instructions_size = -1; 152 #ifdef ASSERT 153 if (ReplayCompiles) { 154 ciReplay::initialize(this); 155 } 156 #endif 157 } 158 159 160 // ------------------------------------------------------------------ 161 // ciMethod::ciMethod 162 // 163 // Unloaded method. 164 ciMethod::ciMethod(ciInstanceKlass* holder, 165 ciSymbol* name, 166 ciSymbol* signature, 167 ciInstanceKlass* accessor) : 168 ciMetadata((Metadata*)NULL), 169 _name( name), 170 _holder( holder), 171 _method_data( NULL), 172 _method_blocks( NULL), 173 _intrinsic_id( vmIntrinsics::_none), 174 _instructions_size(-1), 175 _can_be_statically_bound(false), 176 _liveness( NULL) 177 #if defined(COMPILER2) 178 , 179 _flow( NULL), 180 _bcea( NULL) 181 #endif // COMPILER2 182 { 183 // Usually holder and accessor are the same type but in some cases 184 // the holder has the wrong class loader (e.g. invokedynamic call 185 // sites) so we pass the accessor. 186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 187 } 188 189 190 // ------------------------------------------------------------------ 191 // ciMethod::load_code 192 // 193 // Load the bytecodes and exception handler table for this method. 194 void ciMethod::load_code() { 195 VM_ENTRY_MARK; 196 assert(is_loaded(), "only loaded methods have code"); 197 198 Method* me = get_Method(); 199 Arena* arena = CURRENT_THREAD_ENV->arena(); 200 201 // Load the bytecodes. 202 _code = (address)arena->Amalloc(code_size()); 203 memcpy(_code, me->code_base(), code_size()); 204 205 #if INCLUDE_JVMTI 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 #endif 216 217 // And load the exception table. 218 ExceptionTable exc_table(me); 219 220 // Allocate one extra spot in our list of exceptions. This 221 // last entry will be used to represent the possibility that 222 // an exception escapes the method. See ciExceptionHandlerStream 223 // for details. 224 _exception_handlers = 225 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 226 * (_handler_count + 1)); 227 if (_handler_count > 0) { 228 for (int i=0; i<_handler_count; i++) { 229 _exception_handlers[i] = new (arena) ciExceptionHandler( 230 holder(), 231 /* start */ exc_table.start_pc(i), 232 /* limit */ exc_table.end_pc(i), 233 /* goto pc */ exc_table.handler_pc(i), 234 /* cp index */ exc_table.catch_type_index(i)); 235 } 236 } 237 238 // Put an entry at the end of our list to represent the possibility 239 // of exceptional exit. 240 _exception_handlers[_handler_count] = 241 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 242 243 if (CIPrintMethodCodes) { 244 print_codes(); 245 } 246 } 247 248 249 // ------------------------------------------------------------------ 250 // ciMethod::has_linenumber_table 251 // 252 // length unknown until decompression 253 bool ciMethod::has_linenumber_table() const { 254 check_is_loaded(); 255 VM_ENTRY_MARK; 256 return get_Method()->has_linenumber_table(); 257 } 258 259 260 // ------------------------------------------------------------------ 261 // ciMethod::compressed_linenumber_table 262 u_char* ciMethod::compressed_linenumber_table() const { 263 check_is_loaded(); 264 VM_ENTRY_MARK; 265 return get_Method()->compressed_linenumber_table(); 266 } 267 268 269 // ------------------------------------------------------------------ 270 // ciMethod::line_number_from_bci 271 int ciMethod::line_number_from_bci(int bci) const { 272 check_is_loaded(); 273 VM_ENTRY_MARK; 274 return get_Method()->line_number_from_bci(bci); 275 } 276 277 278 // ------------------------------------------------------------------ 279 // ciMethod::vtable_index 280 // 281 // Get the position of this method's entry in the vtable, if any. 282 int ciMethod::vtable_index() { 283 check_is_loaded(); 284 assert(holder()->is_linked(), "must be linked"); 285 VM_ENTRY_MARK; 286 return get_Method()->vtable_index(); 287 } 288 289 290 // ------------------------------------------------------------------ 291 // ciMethod::native_entry 292 // 293 // Get the address of this method's native code, if any. 294 address ciMethod::native_entry() { 295 check_is_loaded(); 296 assert(flags().is_native(), "must be native method"); 297 VM_ENTRY_MARK; 298 Method* method = get_Method(); 299 address entry = method->native_function(); 300 assert(entry != NULL, "must be valid entry point"); 301 return entry; 302 } 303 304 305 // ------------------------------------------------------------------ 306 // ciMethod::interpreter_entry 307 // 308 // Get the entry point for running this method in the interpreter. 309 address ciMethod::interpreter_entry() { 310 check_is_loaded(); 311 VM_ENTRY_MARK; 312 methodHandle mh(THREAD, get_Method()); 313 return Interpreter::entry_for_method(mh); 314 } 315 316 317 // ------------------------------------------------------------------ 318 // ciMethod::uses_balanced_monitors 319 // 320 // Does this method use monitors in a strict stack-disciplined manner? 321 bool ciMethod::has_balanced_monitors() { 322 check_is_loaded(); 323 if (_balanced_monitors) return true; 324 325 // Analyze the method to see if monitors are used properly. 326 VM_ENTRY_MARK; 327 methodHandle method(THREAD, get_Method()); 328 assert(method->has_monitor_bytecodes(), "should have checked this"); 329 330 // Check to see if a previous compilation computed the 331 // monitor-matching analysis. 332 if (method->guaranteed_monitor_matching()) { 333 _balanced_monitors = true; 334 return true; 335 } 336 337 { 338 EXCEPTION_MARK; 339 ResourceMark rm(THREAD); 340 GeneratePairingInfo gpi(method); 341 gpi.compute_map(CATCH); 342 if (!gpi.monitor_safe()) { 343 return false; 344 } 345 method->set_guaranteed_monitor_matching(); 346 _balanced_monitors = true; 347 } 348 return true; 349 } 350 351 352 // ------------------------------------------------------------------ 353 // ciMethod::get_flow_analysis 354 ciTypeFlow* ciMethod::get_flow_analysis() { 355 #if defined(COMPILER2) 356 if (_flow == NULL) { 357 ciEnv* env = CURRENT_ENV; 358 _flow = new (env->arena()) ciTypeFlow(env, this); 359 _flow->do_flow(); 360 } 361 return _flow; 362 #else // COMPILER2 363 ShouldNotReachHere(); 364 return NULL; 365 #endif // COMPILER2 366 } 367 368 369 // ------------------------------------------------------------------ 370 // ciMethod::get_osr_flow_analysis 371 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 372 #if defined(COMPILER2) 373 // OSR entry points are always place after a call bytecode of some sort 374 assert(osr_bci >= 0, "must supply valid OSR entry point"); 375 ciEnv* env = CURRENT_ENV; 376 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 377 flow->do_flow(); 378 return flow; 379 #else // COMPILER2 380 ShouldNotReachHere(); 381 return NULL; 382 #endif // COMPILER2 383 } 384 385 // ------------------------------------------------------------------ 386 // ciMethod::raw_liveness_at_bci 387 // 388 // Which local variables are live at a specific bci? 389 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 390 check_is_loaded(); 391 if (_liveness == NULL) { 392 // Create the liveness analyzer. 393 Arena* arena = CURRENT_ENV->arena(); 394 _liveness = new (arena) MethodLiveness(arena, this); 395 _liveness->compute_liveness(); 396 } 397 return _liveness->get_liveness_at(bci); 398 } 399 400 // ------------------------------------------------------------------ 401 // ciMethod::liveness_at_bci 402 // 403 // Which local variables are live at a specific bci? When debugging 404 // will return true for all locals in some cases to improve debug 405 // information. 406 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 407 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) { 408 // Keep all locals live for the user's edification and amusement. 409 MethodLivenessResult result(_max_locals); 410 result.set_range(0, _max_locals); 411 result.set_is_valid(); 412 return result; 413 } 414 return raw_liveness_at_bci(bci); 415 } 416 417 // ciMethod::live_local_oops_at_bci 418 // 419 // find all the live oops in the locals array for a particular bci 420 // Compute what the interpreter believes by using the interpreter 421 // oopmap generator. This is used as a double check during osr to 422 // guard against conservative result from MethodLiveness making us 423 // think a dead oop is live. MethodLiveness is conservative in the 424 // sense that it may consider locals to be live which cannot be live, 425 // like in the case where a local could contain an oop or a primitive 426 // along different paths. In that case the local must be dead when 427 // those paths merge. Since the interpreter's viewpoint is used when 428 // gc'ing an interpreter frame we need to use its viewpoint during 429 // OSR when loading the locals. 430 431 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 432 VM_ENTRY_MARK; 433 InterpreterOopMap mask; 434 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 435 int mask_size = max_locals(); 436 ResourceBitMap result(mask_size); 437 int i; 438 for (i = 0; i < mask_size ; i++ ) { 439 if (mask.is_oop(i)) result.set_bit(i); 440 } 441 return result; 442 } 443 444 445 #ifdef COMPILER1 446 // ------------------------------------------------------------------ 447 // ciMethod::bci_block_start 448 // 449 // Marks all bcis where a new basic block starts 450 const BitMap& ciMethod::bci_block_start() { 451 check_is_loaded(); 452 if (_liveness == NULL) { 453 // Create the liveness analyzer. 454 Arena* arena = CURRENT_ENV->arena(); 455 _liveness = new (arena) MethodLiveness(arena, this); 456 _liveness->compute_liveness(); 457 } 458 459 return _liveness->get_bci_block_start(); 460 } 461 #endif // COMPILER1 462 463 464 // ------------------------------------------------------------------ 465 // ciMethod::call_profile_at_bci 466 // 467 // Get the ciCallProfile for the invocation of this method. 468 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 469 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 470 ResourceMark rm; 471 ciCallProfile result; 472 if (method_data() != NULL && method_data()->is_mature()) { 473 ciProfileData* data = method_data()->bci_to_data(bci); 474 if (data != NULL && data->is_CounterData()) { 475 // Every profiled call site has a counter. 476 int count = data->as_CounterData()->count(); 477 478 if (!data->is_ReceiverTypeData()) { 479 result._receiver_count[0] = 0; // that's a definite zero 480 } else { // ReceiverTypeData is a subclass of CounterData 481 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 482 // In addition, virtual call sites have receiver type information 483 int receivers_count_total = 0; 484 int morphism = 0; 485 // Precompute morphism for the possible fixup 486 for (uint i = 0; i < call->row_limit(); i++) { 487 ciKlass* receiver = call->receiver(i); 488 if (receiver == NULL) continue; 489 morphism++; 490 } 491 int epsilon = 0; 492 if (TieredCompilation) { 493 // For a call, it is assumed that either the type of the receiver(s) 494 // is recorded or an associated counter is incremented, but not both. With 495 // tiered compilation, however, both can happen due to the interpreter and 496 // C1 profiling invocations differently. Address that inconsistency here. 497 if (morphism == 1 && count > 0) { 498 epsilon = count; 499 count = 0; 500 } 501 } 502 for (uint i = 0; i < call->row_limit(); i++) { 503 ciKlass* receiver = call->receiver(i); 504 if (receiver == NULL) continue; 505 int rcount = call->receiver_count(i) + epsilon; 506 if (rcount == 0) rcount = 1; // Should be valid value 507 receivers_count_total += rcount; 508 // Add the receiver to result data. 509 result.add_receiver(receiver, rcount); 510 // If we extend profiling to record methods, 511 // we will set result._method also. 512 } 513 // Determine call site's morphism. 514 // The call site count is 0 with known morphism (only 1 or 2 receivers) 515 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 516 // The call site count is > 0 in the case of a polymorphic virtual call. 517 if (morphism > 0 && morphism == result._limit) { 518 // The morphism <= MorphismLimit. 519 if ((morphism < ciCallProfile::MorphismLimit) || 520 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 521 #ifdef ASSERT 522 if (count > 0) { 523 this->print_short_name(tty); 524 tty->print_cr(" @ bci:%d", bci); 525 this->print_codes(); 526 assert(false, "this call site should not be polymorphic"); 527 } 528 #endif 529 result._morphism = morphism; 530 } 531 } 532 // Make the count consistent if this is a call profile. If count is 533 // zero or less, presume that this is a typecheck profile and 534 // do nothing. Otherwise, increase count to be the sum of all 535 // receiver's counts. 536 if (count >= 0) { 537 count += receivers_count_total; 538 } 539 } 540 result._count = count; 541 } 542 } 543 return result; 544 } 545 546 // ------------------------------------------------------------------ 547 // Add new receiver and sort data by receiver's profile count. 548 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 549 // Add new receiver and sort data by receiver's counts when we have space 550 // for it otherwise replace the less called receiver (less called receiver 551 // is placed to the last array element which is not used). 552 // First array's element contains most called receiver. 553 int i = _limit; 554 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 555 _receiver[i] = _receiver[i-1]; 556 _receiver_count[i] = _receiver_count[i-1]; 557 } 558 _receiver[i] = receiver; 559 _receiver_count[i] = receiver_count; 560 if (_limit < MorphismLimit) _limit++; 561 } 562 563 564 void ciMethod::assert_virtual_call_type_ok(int bci) { 565 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 566 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 567 } 568 569 void ciMethod::assert_call_type_ok(int bci) { 570 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 571 java_code_at_bci(bci) == Bytecodes::_invokespecial || 572 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 573 } 574 575 /** 576 * Check whether profiling provides a type for the argument i to the 577 * call at bci bci 578 * 579 * @param [in]bci bci of the call 580 * @param [in]i argument number 581 * @param [out]type profiled type of argument, NULL if none 582 * @param [out]ptr_kind whether always null, never null or maybe null 583 * @return true if profiling exists 584 * 585 */ 586 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 587 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 588 ciProfileData* data = method_data()->bci_to_data(bci); 589 if (data != NULL) { 590 if (data->is_VirtualCallTypeData()) { 591 assert_virtual_call_type_ok(bci); 592 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 593 if (i >= call->number_of_arguments()) { 594 return false; 595 } 596 type = call->valid_argument_type(i); 597 ptr_kind = call->argument_ptr_kind(i); 598 return true; 599 } else if (data->is_CallTypeData()) { 600 assert_call_type_ok(bci); 601 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 602 if (i >= call->number_of_arguments()) { 603 return false; 604 } 605 type = call->valid_argument_type(i); 606 ptr_kind = call->argument_ptr_kind(i); 607 return true; 608 } 609 } 610 } 611 return false; 612 } 613 614 /** 615 * Check whether profiling provides a type for the return value from 616 * the call at bci bci 617 * 618 * @param [in]bci bci of the call 619 * @param [out]type profiled type of argument, NULL if none 620 * @param [out]ptr_kind whether always null, never null or maybe null 621 * @return true if profiling exists 622 * 623 */ 624 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 625 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 626 ciProfileData* data = method_data()->bci_to_data(bci); 627 if (data != NULL) { 628 if (data->is_VirtualCallTypeData()) { 629 assert_virtual_call_type_ok(bci); 630 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 631 if (call->has_return()) { 632 type = call->valid_return_type(); 633 ptr_kind = call->return_ptr_kind(); 634 return true; 635 } 636 } else if (data->is_CallTypeData()) { 637 assert_call_type_ok(bci); 638 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 639 if (call->has_return()) { 640 type = call->valid_return_type(); 641 ptr_kind = call->return_ptr_kind(); 642 } 643 return true; 644 } 645 } 646 } 647 return false; 648 } 649 650 /** 651 * Check whether profiling provides a type for the parameter i 652 * 653 * @param [in]i parameter number 654 * @param [out]type profiled type of parameter, NULL if none 655 * @param [out]ptr_kind whether always null, never null or maybe null 656 * @return true if profiling exists 657 * 658 */ 659 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 660 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 661 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 662 if (parameters != NULL && i < parameters->number_of_parameters()) { 663 type = parameters->valid_parameter_type(i); 664 ptr_kind = parameters->parameter_ptr_kind(i); 665 return true; 666 } 667 } 668 return false; 669 } 670 671 672 // ------------------------------------------------------------------ 673 // ciMethod::find_monomorphic_target 674 // 675 // Given a certain calling environment, find the monomorphic target 676 // for the call. Return NULL if the call is not monomorphic in 677 // its calling environment, or if there are only abstract methods. 678 // The returned method is never abstract. 679 // Note: If caller uses a non-null result, it must inform dependencies 680 // via assert_unique_concrete_method or assert_leaf_type. 681 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 682 ciInstanceKlass* callee_holder, 683 ciInstanceKlass* actual_recv, 684 bool check_access) { 685 check_is_loaded(); 686 687 if (actual_recv->is_interface()) { 688 // %%% We cannot trust interface types, yet. See bug 6312651. 689 return NULL; 690 } 691 692 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 693 if (root_m == NULL) { 694 // Something went wrong looking up the actual receiver method. 695 return NULL; 696 } 697 assert(!root_m->is_abstract(), "resolve_invoke promise"); 698 699 // Make certain quick checks even if UseCHA is false. 700 701 // Is it private or final? 702 if (root_m->can_be_statically_bound()) { 703 return root_m; 704 } 705 706 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 707 // Easy case. There is no other place to put a method, so don't bother 708 // to go through the VM_ENTRY_MARK and all the rest. 709 return root_m; 710 } 711 712 // Array methods (clone, hashCode, etc.) are always statically bound. 713 // If we were to see an array type here, we'd return root_m. 714 // However, this method processes only ciInstanceKlasses. (See 4962591.) 715 // The inline_native_clone intrinsic narrows Object to T[] properly, 716 // so there is no need to do the same job here. 717 718 if (!UseCHA) return NULL; 719 720 VM_ENTRY_MARK; 721 722 // Disable CHA for default methods for now 723 if (root_m->is_default_method()) { 724 return NULL; 725 } 726 727 methodHandle target; 728 { 729 MutexLocker locker(Compile_lock); 730 Klass* context = actual_recv->get_Klass(); 731 target = Dependencies::find_unique_concrete_method(context, 732 root_m->get_Method()); 733 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 734 } 735 736 #ifndef PRODUCT 737 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 738 tty->print("found a non-root unique target method"); 739 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 740 tty->print(" method = "); 741 target->print_short_name(tty); 742 tty->cr(); 743 } 744 #endif //PRODUCT 745 746 if (target() == NULL) { 747 return NULL; 748 } 749 if (target() == root_m->get_Method()) { 750 return root_m; 751 } 752 if (!root_m->is_public() && 753 !root_m->is_protected()) { 754 // If we are going to reason about inheritance, it's easiest 755 // if the method in question is public, protected, or private. 756 // If the answer is not root_m, it is conservatively correct 757 // to return NULL, even if the CHA encountered irrelevant 758 // methods in other packages. 759 // %%% TO DO: Work out logic for package-private methods 760 // with the same name but different vtable indexes. 761 return NULL; 762 } 763 assert(!target()->is_abstract(), "not allowed"); 764 return CURRENT_THREAD_ENV->get_method(target()); 765 } 766 767 // ------------------------------------------------------------------ 768 // ciMethod::can_be_statically_bound 769 // 770 // Tries to determine whether a method can be statically bound in some context. 771 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const { 772 return (holder() == context) && can_be_statically_bound(); 773 } 774 775 // ------------------------------------------------------------------ 776 // ciMethod::resolve_invoke 777 // 778 // Given a known receiver klass, find the target for the call. 779 // Return NULL if the call has no target or the target is abstract. 780 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 781 check_is_loaded(); 782 VM_ENTRY_MARK; 783 784 Klass* caller_klass = caller->get_Klass(); 785 Klass* recv = exact_receiver->get_Klass(); 786 Klass* resolved = holder()->get_Klass(); 787 Symbol* h_name = name()->get_symbol(); 788 Symbol* h_signature = signature()->get_symbol(); 789 790 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 791 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 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 (recv->is_array_klass() 796 || 797 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 798 if (holder()->is_interface()) { 799 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 800 } else { 801 m = LinkResolver::resolve_virtual_call_or_null(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 Klass* caller_klass = caller->get_Klass(); 841 Klass* recv = receiver->get_Klass(); 842 Symbol* h_name = name()->get_symbol(); 843 Symbol* h_signature = signature()->get_symbol(); 844 845 LinkInfo link_info(recv, h_name, h_signature, caller_klass); 846 vtable_index = LinkResolver::resolve_virtual_vtable_index(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 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) { 889 ciBytecodeStream iter(this); 890 iter.reset_to_bci(bci); 891 iter.next(); 892 return iter.get_declared_method_holder(); 893 } 894 895 // ------------------------------------------------------------------ 896 // Adjust a CounterData count to be commensurate with 897 // interpreter_invocation_count. If the MDO exists for 898 // only 25% of the time the method exists, then the 899 // counts in the MDO should be scaled by 4X, so that 900 // they can be usefully and stably compared against the 901 // invocation counts in methods. 902 int ciMethod::scale_count(int count, float prof_factor) { 903 if (count > 0 && method_data() != NULL) { 904 int counter_life; 905 int method_life = interpreter_invocation_count(); 906 if (TieredCompilation) { 907 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 908 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 909 } else { 910 int current_mileage = method_data()->current_mileage(); 911 int creation_mileage = method_data()->creation_mileage(); 912 counter_life = current_mileage - creation_mileage; 913 } 914 915 // counter_life due to backedge_counter could be > method_life 916 if (counter_life > method_life) 917 counter_life = method_life; 918 if (0 < counter_life && counter_life <= method_life) { 919 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 920 count = (count > 0) ? count : 1; 921 } 922 } 923 return count; 924 } 925 926 927 // ------------------------------------------------------------------ 928 // ciMethod::is_special_get_caller_class_method 929 // 930 bool ciMethod::is_ignored_by_security_stack_walk() const { 931 check_is_loaded(); 932 VM_ENTRY_MARK; 933 return get_Method()->is_ignored_by_security_stack_walk(); 934 } 935 936 // ------------------------------------------------------------------ 937 // ciMethod::needs_clinit_barrier 938 // 939 bool ciMethod::needs_clinit_barrier() const { 940 check_is_loaded(); 941 return is_static() && !holder()->is_initialized(); 942 } 943 944 // ------------------------------------------------------------------ 945 // invokedynamic support 946 947 // ------------------------------------------------------------------ 948 // ciMethod::is_method_handle_intrinsic 949 // 950 // Return true if the method is an instance of the JVM-generated 951 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 952 bool ciMethod::is_method_handle_intrinsic() const { 953 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 954 return (MethodHandles::is_signature_polymorphic(iid) && 955 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 956 } 957 958 // ------------------------------------------------------------------ 959 // ciMethod::is_compiled_lambda_form 960 // 961 // Return true if the method is a generated MethodHandle adapter. 962 // These are built by Java code. 963 bool ciMethod::is_compiled_lambda_form() const { 964 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 965 return iid == vmIntrinsics::_compiledLambdaForm; 966 } 967 968 // ------------------------------------------------------------------ 969 // ciMethod::is_object_initializer 970 // 971 bool ciMethod::is_object_initializer() const { 972 return name() == ciSymbol::object_initializer_name(); 973 } 974 975 // ------------------------------------------------------------------ 976 // ciMethod::has_member_arg 977 // 978 // Return true if the method is a linker intrinsic like _linkToVirtual. 979 // These are built by the JVM. 980 bool ciMethod::has_member_arg() const { 981 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 982 return (MethodHandles::is_signature_polymorphic(iid) && 983 MethodHandles::has_member_arg(iid)); 984 } 985 986 // ------------------------------------------------------------------ 987 // ciMethod::ensure_method_data 988 // 989 // Generate new MethodData* objects at compile time. 990 // Return true if allocation was successful or no MDO is required. 991 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 992 EXCEPTION_CONTEXT; 993 if (is_native() || is_abstract() || h_m()->is_accessor()) { 994 return true; 995 } 996 if (h_m()->method_data() == NULL) { 997 Method::build_interpreter_method_data(h_m, THREAD); 998 if (HAS_PENDING_EXCEPTION) { 999 CLEAR_PENDING_EXCEPTION; 1000 } 1001 } 1002 if (h_m()->method_data() != NULL) { 1003 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1004 _method_data->load_data(); 1005 return true; 1006 } else { 1007 _method_data = CURRENT_ENV->get_empty_methodData(); 1008 return false; 1009 } 1010 } 1011 1012 // public, retroactive version 1013 bool ciMethod::ensure_method_data() { 1014 bool result = true; 1015 if (_method_data == NULL || _method_data->is_empty()) { 1016 GUARDED_VM_ENTRY({ 1017 result = ensure_method_data(get_Method()); 1018 }); 1019 } 1020 return result; 1021 } 1022 1023 1024 // ------------------------------------------------------------------ 1025 // ciMethod::method_data 1026 // 1027 ciMethodData* ciMethod::method_data() { 1028 if (_method_data != NULL) { 1029 return _method_data; 1030 } 1031 VM_ENTRY_MARK; 1032 ciEnv* env = CURRENT_ENV; 1033 Thread* my_thread = JavaThread::current(); 1034 methodHandle h_m(my_thread, get_Method()); 1035 1036 if (h_m()->method_data() != NULL) { 1037 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1038 _method_data->load_data(); 1039 } else { 1040 _method_data = CURRENT_ENV->get_empty_methodData(); 1041 } 1042 return _method_data; 1043 1044 } 1045 1046 // ------------------------------------------------------------------ 1047 // ciMethod::method_data_or_null 1048 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1049 // NULL otherwise. 1050 ciMethodData* ciMethod::method_data_or_null() { 1051 ciMethodData *md = method_data(); 1052 if (md->is_empty()) { 1053 return NULL; 1054 } 1055 return md; 1056 } 1057 1058 // ------------------------------------------------------------------ 1059 // ciMethod::ensure_method_counters 1060 // 1061 MethodCounters* ciMethod::ensure_method_counters() { 1062 check_is_loaded(); 1063 VM_ENTRY_MARK; 1064 methodHandle mh(THREAD, get_Method()); 1065 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1066 return method_counters; 1067 } 1068 1069 // ------------------------------------------------------------------ 1070 // ciMethod::has_option 1071 // 1072 bool ciMethod::has_option(const char* option) { 1073 check_is_loaded(); 1074 VM_ENTRY_MARK; 1075 methodHandle mh(THREAD, get_Method()); 1076 return CompilerOracle::has_option_string(mh, option); 1077 } 1078 1079 // ------------------------------------------------------------------ 1080 // ciMethod::has_option_value 1081 // 1082 bool ciMethod::has_option_value(const char* option, double& value) { 1083 check_is_loaded(); 1084 VM_ENTRY_MARK; 1085 methodHandle mh(THREAD, get_Method()); 1086 return CompilerOracle::has_option_value(mh, option, value); 1087 } 1088 // ------------------------------------------------------------------ 1089 // ciMethod::can_be_compiled 1090 // 1091 // Have previous compilations of this method succeeded? 1092 bool ciMethod::can_be_compiled() { 1093 check_is_loaded(); 1094 ciEnv* env = CURRENT_ENV; 1095 if (is_c1_compile(env->comp_level())) { 1096 return _is_c1_compilable; 1097 } 1098 return _is_c2_compilable; 1099 } 1100 1101 // ------------------------------------------------------------------ 1102 // ciMethod::set_not_compilable 1103 // 1104 // Tell the VM that this method cannot be compiled at all. 1105 void ciMethod::set_not_compilable(const char* reason) { 1106 check_is_loaded(); 1107 VM_ENTRY_MARK; 1108 ciEnv* env = CURRENT_ENV; 1109 if (is_c1_compile(env->comp_level())) { 1110 _is_c1_compilable = false; 1111 } else { 1112 _is_c2_compilable = false; 1113 } 1114 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1115 } 1116 1117 // ------------------------------------------------------------------ 1118 // ciMethod::can_be_osr_compiled 1119 // 1120 // Have previous compilations of this method succeeded? 1121 // 1122 // Implementation note: the VM does not currently keep track 1123 // of failed OSR compilations per bci. The entry_bci parameter 1124 // is currently unused. 1125 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1126 check_is_loaded(); 1127 VM_ENTRY_MARK; 1128 ciEnv* env = CURRENT_ENV; 1129 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1130 } 1131 1132 // ------------------------------------------------------------------ 1133 // ciMethod::has_compiled_code 1134 bool ciMethod::has_compiled_code() { 1135 return instructions_size() > 0; 1136 } 1137 1138 int ciMethod::comp_level() { 1139 check_is_loaded(); 1140 VM_ENTRY_MARK; 1141 CompiledMethod* nm = get_Method()->code(); 1142 if (nm != NULL) return nm->comp_level(); 1143 return 0; 1144 } 1145 1146 int ciMethod::highest_osr_comp_level() { 1147 check_is_loaded(); 1148 VM_ENTRY_MARK; 1149 return get_Method()->highest_osr_comp_level(); 1150 } 1151 1152 // ------------------------------------------------------------------ 1153 // ciMethod::code_size_for_inlining 1154 // 1155 // Code size for inlining decisions. This method returns a code 1156 // size of 1 for methods which has the ForceInline annotation. 1157 int ciMethod::code_size_for_inlining() { 1158 check_is_loaded(); 1159 if (get_Method()->force_inline()) { 1160 return 1; 1161 } 1162 return code_size(); 1163 } 1164 1165 // ------------------------------------------------------------------ 1166 // ciMethod::instructions_size 1167 // 1168 // This is a rough metric for "fat" methods, compared before inlining 1169 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1170 // junk like exception handler, stubs, and constant table, which are 1171 // not highly relevant to an inlined method. So we use the more 1172 // specific accessor nmethod::insts_size. 1173 int ciMethod::instructions_size() { 1174 if (_instructions_size == -1) { 1175 GUARDED_VM_ENTRY( 1176 CompiledMethod* code = get_Method()->code(); 1177 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1178 _instructions_size = code->insts_end() - code->verified_entry_point(); 1179 } else { 1180 _instructions_size = 0; 1181 } 1182 ); 1183 } 1184 return _instructions_size; 1185 } 1186 1187 // ------------------------------------------------------------------ 1188 // ciMethod::log_nmethod_identity 1189 void ciMethod::log_nmethod_identity(xmlStream* log) { 1190 GUARDED_VM_ENTRY( 1191 CompiledMethod* code = get_Method()->code(); 1192 if (code != NULL) { 1193 code->log_identity(log); 1194 } 1195 ) 1196 } 1197 1198 // ------------------------------------------------------------------ 1199 // ciMethod::is_not_reached 1200 bool ciMethod::is_not_reached(int bci) { 1201 check_is_loaded(); 1202 VM_ENTRY_MARK; 1203 return Interpreter::is_not_reached( 1204 methodHandle(THREAD, get_Method()), bci); 1205 } 1206 1207 // ------------------------------------------------------------------ 1208 // ciMethod::was_never_executed 1209 bool ciMethod::was_executed_more_than(int times) { 1210 VM_ENTRY_MARK; 1211 return get_Method()->was_executed_more_than(times); 1212 } 1213 1214 // ------------------------------------------------------------------ 1215 // ciMethod::has_unloaded_classes_in_signature 1216 bool ciMethod::has_unloaded_classes_in_signature() { 1217 VM_ENTRY_MARK; 1218 { 1219 EXCEPTION_MARK; 1220 methodHandle m(THREAD, get_Method()); 1221 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1222 if( HAS_PENDING_EXCEPTION ) { 1223 CLEAR_PENDING_EXCEPTION; 1224 return true; // Declare that we may have unloaded classes 1225 } 1226 return has_unloaded; 1227 } 1228 } 1229 1230 // ------------------------------------------------------------------ 1231 // ciMethod::is_klass_loaded 1232 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1233 VM_ENTRY_MARK; 1234 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1235 } 1236 1237 // ------------------------------------------------------------------ 1238 // ciMethod::check_call 1239 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1240 // This method is used only in C2 from InlineTree::ok_to_inline, 1241 // and is only used under -Xcomp. 1242 // It appears to fail when applied to an invokeinterface call site. 1243 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1244 VM_ENTRY_MARK; 1245 { 1246 EXCEPTION_MARK; 1247 HandleMark hm(THREAD); 1248 constantPoolHandle pool (THREAD, get_Method()->constants()); 1249 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1250 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1251 if (HAS_PENDING_EXCEPTION) { 1252 CLEAR_PENDING_EXCEPTION; 1253 return false; 1254 } else { 1255 return (spec_method->is_static() == is_static); 1256 } 1257 } 1258 return false; 1259 } 1260 1261 // ------------------------------------------------------------------ 1262 // ciMethod::profile_aging 1263 // 1264 // Should the method be compiled with an age counter? 1265 bool ciMethod::profile_aging() const { 1266 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1267 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1268 } 1269 // ------------------------------------------------------------------ 1270 // ciMethod::print_codes 1271 // 1272 // Print the bytecodes for this method. 1273 void ciMethod::print_codes_on(outputStream* st) { 1274 check_is_loaded(); 1275 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1276 } 1277 1278 1279 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1280 check_is_loaded(); \ 1281 VM_ENTRY_MARK; \ 1282 return get_Method()->flag_accessor(); \ 1283 } 1284 1285 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1286 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1287 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1288 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1289 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1290 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1291 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1292 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1293 1294 bool ciMethod::is_boxing_method() const { 1295 if (holder()->is_box_klass()) { 1296 switch (intrinsic_id()) { 1297 case vmIntrinsics::_Boolean_valueOf: 1298 case vmIntrinsics::_Byte_valueOf: 1299 case vmIntrinsics::_Character_valueOf: 1300 case vmIntrinsics::_Short_valueOf: 1301 case vmIntrinsics::_Integer_valueOf: 1302 case vmIntrinsics::_Long_valueOf: 1303 case vmIntrinsics::_Float_valueOf: 1304 case vmIntrinsics::_Double_valueOf: 1305 return true; 1306 default: 1307 return false; 1308 } 1309 } 1310 return false; 1311 } 1312 1313 bool ciMethod::is_unboxing_method() const { 1314 if (holder()->is_box_klass()) { 1315 switch (intrinsic_id()) { 1316 case vmIntrinsics::_booleanValue: 1317 case vmIntrinsics::_byteValue: 1318 case vmIntrinsics::_charValue: 1319 case vmIntrinsics::_shortValue: 1320 case vmIntrinsics::_intValue: 1321 case vmIntrinsics::_longValue: 1322 case vmIntrinsics::_floatValue: 1323 case vmIntrinsics::_doubleValue: 1324 return true; 1325 default: 1326 return false; 1327 } 1328 } 1329 return false; 1330 } 1331 1332 BCEscapeAnalyzer *ciMethod::get_bcea() { 1333 #ifdef COMPILER2 1334 if (_bcea == NULL) { 1335 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1336 } 1337 return _bcea; 1338 #else // COMPILER2 1339 ShouldNotReachHere(); 1340 return NULL; 1341 #endif // COMPILER2 1342 } 1343 1344 ciMethodBlocks *ciMethod::get_method_blocks() { 1345 Arena *arena = CURRENT_ENV->arena(); 1346 if (_method_blocks == NULL) { 1347 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1348 } 1349 return _method_blocks; 1350 } 1351 1352 #undef FETCH_FLAG_FROM_VM 1353 1354 void ciMethod::dump_name_as_ascii(outputStream* st) { 1355 Method* method = get_Method(); 1356 st->print("%s %s %s", 1357 method->klass_name()->as_quoted_ascii(), 1358 method->name()->as_quoted_ascii(), 1359 method->signature()->as_quoted_ascii()); 1360 } 1361 1362 void ciMethod::dump_replay_data(outputStream* st) { 1363 ResourceMark rm; 1364 Method* method = get_Method(); 1365 MethodCounters* mcs = method->method_counters(); 1366 st->print("ciMethod "); 1367 dump_name_as_ascii(st); 1368 st->print_cr(" %d %d %d %d %d", 1369 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1370 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1371 interpreter_invocation_count(), 1372 interpreter_throwout_count(), 1373 _instructions_size); 1374 } 1375 1376 // ------------------------------------------------------------------ 1377 // ciMethod::print_codes 1378 // 1379 // Print a range of the bytecodes for this method. 1380 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1381 check_is_loaded(); 1382 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1383 } 1384 1385 // ------------------------------------------------------------------ 1386 // ciMethod::print_name 1387 // 1388 // Print the name of this method, including signature and some flags. 1389 void ciMethod::print_name(outputStream* st) { 1390 check_is_loaded(); 1391 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1392 } 1393 1394 // ------------------------------------------------------------------ 1395 // ciMethod::print_short_name 1396 // 1397 // Print the name of this method, without signature. 1398 void ciMethod::print_short_name(outputStream* st) { 1399 if (is_loaded()) { 1400 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1401 } else { 1402 // Fall back if method is not loaded. 1403 holder()->print_name_on(st); 1404 st->print("::"); 1405 name()->print_symbol_on(st); 1406 if (WizardMode) 1407 signature()->as_symbol()->print_symbol_on(st); 1408 } 1409 } 1410 1411 // ------------------------------------------------------------------ 1412 // ciMethod::print_impl 1413 // 1414 // Implementation of the print method. 1415 void ciMethod::print_impl(outputStream* st) { 1416 ciMetadata::print_impl(st); 1417 st->print(" name="); 1418 name()->print_symbol_on(st); 1419 st->print(" holder="); 1420 holder()->print_name_on(st); 1421 st->print(" signature="); 1422 signature()->as_symbol()->print_symbol_on(st); 1423 if (is_loaded()) { 1424 st->print(" loaded=true"); 1425 st->print(" arg_size=%d", arg_size()); 1426 st->print(" flags="); 1427 flags().print_member_flags(st); 1428 } else { 1429 st->print(" loaded=false"); 1430 } 1431 } 1432 1433 // ------------------------------------------------------------------ 1434 1435 static BasicType erase_to_word_type(BasicType bt) { 1436 if (is_subword_type(bt)) return T_INT; 1437 if (bt == T_ARRAY) return T_OBJECT; 1438 return bt; 1439 } 1440 1441 static bool basic_types_match(ciType* t1, ciType* t2) { 1442 if (t1 == t2) return true; 1443 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1444 } 1445 1446 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1447 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1448 !resolved_method->is_method_handle_intrinsic(); 1449 1450 if (!invoke_through_mh_intrinsic) { 1451 // Method name & descriptor should stay the same. 1452 // Signatures may reference unloaded types and thus they may be not strictly equal. 1453 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1454 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1455 1456 return (declared_method->name()->equals(resolved_method->name())) && 1457 (declared_signature->equals(resolved_signature)); 1458 } 1459 1460 ciMethod* linker = declared_method; 1461 ciMethod* target = resolved_method; 1462 // Linkers have appendix argument which is not passed to callee. 1463 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1464 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1465 return false; // argument slot count mismatch 1466 } 1467 1468 ciSignature* linker_sig = linker->signature(); 1469 ciSignature* target_sig = target->signature(); 1470 1471 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1472 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1473 return false; // argument count mismatch 1474 } 1475 1476 int sbase = 0, rbase = 0; 1477 switch (linker->intrinsic_id()) { 1478 case vmIntrinsics::_linkToVirtual: 1479 case vmIntrinsics::_linkToInterface: 1480 case vmIntrinsics::_linkToSpecial: { 1481 if (target->is_static()) { 1482 return false; 1483 } 1484 if (linker_sig->type_at(0)->is_primitive_type()) { 1485 return false; // receiver should be an oop 1486 } 1487 sbase = 1; // skip receiver 1488 break; 1489 } 1490 case vmIntrinsics::_linkToStatic: { 1491 if (!target->is_static()) { 1492 return false; 1493 } 1494 break; 1495 } 1496 case vmIntrinsics::_invokeBasic: { 1497 if (target->is_static()) { 1498 if (target_sig->type_at(0)->is_primitive_type()) { 1499 return false; // receiver should be an oop 1500 } 1501 rbase = 1; // skip receiver 1502 } 1503 break; 1504 } 1505 default: 1506 break; 1507 } 1508 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1509 int arg_count = target_sig->count() - rbase; 1510 for (int i = 0; i < arg_count; i++) { 1511 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1512 return false; 1513 } 1514 } 1515 // Only check the return type if the symbolic info has non-void return type. 1516 // I.e. the return value of the resolved method can be dropped. 1517 if (!linker->return_type()->is_void() && 1518 !basic_types_match(linker->return_type(), target->return_type())) { 1519 return false; 1520 } 1521 return true; // no mismatch found 1522 } 1523 1524 // ------------------------------------------------------------------