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 "utilities/bitMap.inline.hpp" 50 #include "utilities/xmlstream.hpp" 51 #ifdef COMPILER2 52 #include "ci/bcEscapeAnalyzer.hpp" 53 #include "ci/ciTypeFlow.hpp" 54 #include "oops/method.hpp" 55 #endif 56 57 // ciMethod 58 // 59 // This class represents a Method* in the HotSpot virtual 60 // machine. 61 62 63 // ------------------------------------------------------------------ 64 // ciMethod::ciMethod 65 // 66 // Loaded method. 67 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 68 ciMetadata(h_m()), 69 _holder(holder) 70 { 71 assert(h_m() != NULL, "no null method"); 72 73 if (LogTouchedMethods) { 74 h_m()->log_touched(Thread::current()); 75 } 76 // These fields are always filled in in loaded methods. 77 _flags = ciFlags(h_m()->access_flags()); 78 79 // Easy to compute, so fill them in now. 80 _max_stack = h_m()->max_stack(); 81 _max_locals = h_m()->max_locals(); 82 _code_size = h_m()->code_size(); 83 _intrinsic_id = h_m()->intrinsic_id(); 84 _handler_count = h_m()->exception_table_length(); 85 _size_of_parameters = h_m()->size_of_parameters(); 86 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 87 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 88 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 89 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 90 _can_be_parsed = true; 91 _has_reserved_stack_access = h_m()->has_reserved_stack_access(); 92 // Lazy fields, filled in on demand. Require allocation. 93 _code = NULL; 94 _exception_handlers = NULL; 95 _liveness = NULL; 96 _method_blocks = NULL; 97 #if defined(COMPILER2) 98 _flow = NULL; 99 _bcea = NULL; 100 #endif // COMPILER2 101 102 ciEnv *env = CURRENT_ENV; 103 if (env->jvmti_can_hotswap_or_post_breakpoint()) { 104 // 6328518 check hotswap conditions under the right lock. 105 MutexLocker locker(Compile_lock); 106 if (Dependencies::check_evol_method(h_m()) != NULL) { 107 _is_c1_compilable = false; 108 _is_c2_compilable = false; 109 _can_be_parsed = false; 110 } 111 } else { 112 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 113 } 114 115 if (h_m()->method_holder()->is_linked()) { 116 _can_be_statically_bound = h_m()->can_be_statically_bound(); 117 } else { 118 // Have to use a conservative value in this case. 119 _can_be_statically_bound = false; 120 } 121 122 // Adjust the definition of this condition to be more useful: 123 // %%% take these conditions into account in vtable generation 124 if (!_can_be_statically_bound && h_m()->is_private()) 125 _can_be_statically_bound = true; 126 if (_can_be_statically_bound && h_m()->is_abstract()) 127 _can_be_statically_bound = false; 128 129 // generating _signature may allow GC and therefore move m. 130 // These fields are always filled in. 131 _name = env->get_symbol(h_m()->name()); 132 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 133 constantPoolHandle cpool = h_m()->constants(); 134 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 135 _method_data = NULL; 136 _nmethod_age = h_m()->nmethod_age(); 137 // Take a snapshot of these values, so they will be commensurate with the MDO. 138 if (ProfileInterpreter || TieredCompilation) { 139 int invcnt = h_m()->interpreter_invocation_count(); 140 // if the value overflowed report it as max int 141 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 142 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 143 } else { 144 _interpreter_invocation_count = 0; 145 _interpreter_throwout_count = 0; 146 } 147 if (_interpreter_invocation_count == 0) 148 _interpreter_invocation_count = 1; 149 _instructions_size = -1; 150 #ifdef ASSERT 151 if (ReplayCompiles) { 152 ciReplay::initialize(this); 153 } 154 #endif 155 } 156 157 158 // ------------------------------------------------------------------ 159 // ciMethod::ciMethod 160 // 161 // Unloaded method. 162 ciMethod::ciMethod(ciInstanceKlass* holder, 163 ciSymbol* name, 164 ciSymbol* signature, 165 ciInstanceKlass* accessor) : 166 ciMetadata((Metadata*)NULL), 167 _name( name), 168 _holder( holder), 169 _method_data( NULL), 170 _method_blocks( NULL), 171 _intrinsic_id( vmIntrinsics::_none), 172 _instructions_size(-1), 173 _can_be_statically_bound(false), 174 _liveness( NULL) 175 #if defined(COMPILER2) 176 , 177 _flow( NULL), 178 _bcea( NULL) 179 #endif // COMPILER2 180 { 181 // Usually holder and accessor are the same type but in some cases 182 // the holder has the wrong class loader (e.g. invokedynamic call 183 // sites) so we pass the accessor. 184 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 185 } 186 187 188 // ------------------------------------------------------------------ 189 // ciMethod::load_code 190 // 191 // Load the bytecodes and exception handler table for this method. 192 void ciMethod::load_code() { 193 VM_ENTRY_MARK; 194 assert(is_loaded(), "only loaded methods have code"); 195 196 Method* me = get_Method(); 197 Arena* arena = CURRENT_THREAD_ENV->arena(); 198 199 // Load the bytecodes. 200 _code = (address)arena->Amalloc(code_size()); 201 memcpy(_code, me->code_base(), code_size()); 202 203 #if INCLUDE_JVMTI 204 // Revert any breakpoint bytecodes in ci's copy 205 if (me->number_of_breakpoints() > 0) { 206 BreakpointInfo* bp = me->method_holder()->breakpoints(); 207 for (; bp != NULL; bp = bp->next()) { 208 if (bp->match(me)) { 209 code_at_put(bp->bci(), bp->orig_bytecode()); 210 } 211 } 212 } 213 #endif 214 215 // And load the exception table. 216 ExceptionTable exc_table(me); 217 218 // Allocate one extra spot in our list of exceptions. This 219 // last entry will be used to represent the possibility that 220 // an exception escapes the method. See ciExceptionHandlerStream 221 // for details. 222 _exception_handlers = 223 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 224 * (_handler_count + 1)); 225 if (_handler_count > 0) { 226 for (int i=0; i<_handler_count; i++) { 227 _exception_handlers[i] = new (arena) ciExceptionHandler( 228 holder(), 229 /* start */ exc_table.start_pc(i), 230 /* limit */ exc_table.end_pc(i), 231 /* goto pc */ exc_table.handler_pc(i), 232 /* cp index */ exc_table.catch_type_index(i)); 233 } 234 } 235 236 // Put an entry at the end of our list to represent the possibility 237 // of exceptional exit. 238 _exception_handlers[_handler_count] = 239 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 240 241 if (CIPrintMethodCodes) { 242 print_codes(); 243 } 244 } 245 246 247 // ------------------------------------------------------------------ 248 // ciMethod::has_linenumber_table 249 // 250 // length unknown until decompression 251 bool ciMethod::has_linenumber_table() const { 252 check_is_loaded(); 253 VM_ENTRY_MARK; 254 return get_Method()->has_linenumber_table(); 255 } 256 257 258 // ------------------------------------------------------------------ 259 // ciMethod::compressed_linenumber_table 260 u_char* ciMethod::compressed_linenumber_table() const { 261 check_is_loaded(); 262 VM_ENTRY_MARK; 263 return get_Method()->compressed_linenumber_table(); 264 } 265 266 267 // ------------------------------------------------------------------ 268 // ciMethod::line_number_from_bci 269 int ciMethod::line_number_from_bci(int bci) const { 270 check_is_loaded(); 271 VM_ENTRY_MARK; 272 return get_Method()->line_number_from_bci(bci); 273 } 274 275 276 // ------------------------------------------------------------------ 277 // ciMethod::vtable_index 278 // 279 // Get the position of this method's entry in the vtable, if any. 280 int ciMethod::vtable_index() { 281 check_is_loaded(); 282 assert(holder()->is_linked(), "must be linked"); 283 VM_ENTRY_MARK; 284 return get_Method()->vtable_index(); 285 } 286 287 288 // ------------------------------------------------------------------ 289 // ciMethod::native_entry 290 // 291 // Get the address of this method's native code, if any. 292 address ciMethod::native_entry() { 293 check_is_loaded(); 294 assert(flags().is_native(), "must be native method"); 295 VM_ENTRY_MARK; 296 Method* method = get_Method(); 297 address entry = method->native_function(); 298 assert(entry != NULL, "must be valid entry point"); 299 return entry; 300 } 301 302 303 // ------------------------------------------------------------------ 304 // ciMethod::interpreter_entry 305 // 306 // Get the entry point for running this method in the interpreter. 307 address ciMethod::interpreter_entry() { 308 check_is_loaded(); 309 VM_ENTRY_MARK; 310 methodHandle mh(THREAD, get_Method()); 311 return Interpreter::entry_for_method(mh); 312 } 313 314 315 // ------------------------------------------------------------------ 316 // ciMethod::uses_balanced_monitors 317 // 318 // Does this method use monitors in a strict stack-disciplined manner? 319 bool ciMethod::has_balanced_monitors() { 320 check_is_loaded(); 321 if (_balanced_monitors) return true; 322 323 // Analyze the method to see if monitors are used properly. 324 VM_ENTRY_MARK; 325 methodHandle method(THREAD, get_Method()); 326 assert(method->has_monitor_bytecodes(), "should have checked this"); 327 328 // Check to see if a previous compilation computed the 329 // monitor-matching analysis. 330 if (method->guaranteed_monitor_matching()) { 331 _balanced_monitors = true; 332 return true; 333 } 334 335 { 336 EXCEPTION_MARK; 337 ResourceMark rm(THREAD); 338 GeneratePairingInfo gpi(method); 339 gpi.compute_map(CATCH); 340 if (!gpi.monitor_safe()) { 341 return false; 342 } 343 method->set_guaranteed_monitor_matching(); 344 _balanced_monitors = true; 345 } 346 return true; 347 } 348 349 350 // ------------------------------------------------------------------ 351 // ciMethod::get_flow_analysis 352 ciTypeFlow* ciMethod::get_flow_analysis() { 353 #if defined(COMPILER2) 354 if (_flow == NULL) { 355 ciEnv* env = CURRENT_ENV; 356 _flow = new (env->arena()) ciTypeFlow(env, this); 357 _flow->do_flow(); 358 } 359 return _flow; 360 #else // COMPILER2 361 ShouldNotReachHere(); 362 return NULL; 363 #endif // COMPILER2 364 } 365 366 367 // ------------------------------------------------------------------ 368 // ciMethod::get_osr_flow_analysis 369 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 370 #if defined(COMPILER2) 371 // OSR entry points are always place after a call bytecode of some sort 372 assert(osr_bci >= 0, "must supply valid OSR entry point"); 373 ciEnv* env = CURRENT_ENV; 374 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 375 flow->do_flow(); 376 return flow; 377 #else // COMPILER2 378 ShouldNotReachHere(); 379 return NULL; 380 #endif // COMPILER2 381 } 382 383 // ------------------------------------------------------------------ 384 // ciMethod::raw_liveness_at_bci 385 // 386 // Which local variables are live at a specific bci? 387 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 388 check_is_loaded(); 389 if (_liveness == NULL) { 390 // Create the liveness analyzer. 391 Arena* arena = CURRENT_ENV->arena(); 392 _liveness = new (arena) MethodLiveness(arena, this); 393 _liveness->compute_liveness(); 394 } 395 return _liveness->get_liveness_at(bci); 396 } 397 398 // ------------------------------------------------------------------ 399 // ciMethod::liveness_at_bci 400 // 401 // Which local variables are live at a specific bci? When debugging 402 // will return true for all locals in some cases to improve debug 403 // information. 404 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 405 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) { 406 // Keep all locals live for the user's edification and amusement. 407 MethodLivenessResult result(_max_locals); 408 result.set_range(0, _max_locals); 409 result.set_is_valid(); 410 return result; 411 } 412 return raw_liveness_at_bci(bci); 413 } 414 415 // ciMethod::live_local_oops_at_bci 416 // 417 // find all the live oops in the locals array for a particular bci 418 // Compute what the interpreter believes by using the interpreter 419 // oopmap generator. This is used as a double check during osr to 420 // guard against conservative result from MethodLiveness making us 421 // think a dead oop is live. MethodLiveness is conservative in the 422 // sense that it may consider locals to be live which cannot be live, 423 // like in the case where a local could contain an oop or a primitive 424 // along different paths. In that case the local must be dead when 425 // those paths merge. Since the interpreter's viewpoint is used when 426 // gc'ing an interpreter frame we need to use its viewpoint during 427 // OSR when loading the locals. 428 429 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 430 VM_ENTRY_MARK; 431 InterpreterOopMap mask; 432 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 433 int mask_size = max_locals(); 434 ResourceBitMap result(mask_size); 435 int i; 436 for (i = 0; i < mask_size ; i++ ) { 437 if (mask.is_oop(i)) result.set_bit(i); 438 } 439 return result; 440 } 441 442 443 #ifdef COMPILER1 444 // ------------------------------------------------------------------ 445 // ciMethod::bci_block_start 446 // 447 // Marks all bcis where a new basic block starts 448 const BitMap& ciMethod::bci_block_start() { 449 check_is_loaded(); 450 if (_liveness == NULL) { 451 // Create the liveness analyzer. 452 Arena* arena = CURRENT_ENV->arena(); 453 _liveness = new (arena) MethodLiveness(arena, this); 454 _liveness->compute_liveness(); 455 } 456 457 return _liveness->get_bci_block_start(); 458 } 459 #endif // COMPILER1 460 461 462 // ------------------------------------------------------------------ 463 // ciMethod::call_profile_at_bci 464 // 465 // Get the ciCallProfile for the invocation of this method. 466 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 467 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 468 ResourceMark rm; 469 ciCallProfile result; 470 if (method_data() != NULL && method_data()->is_mature()) { 471 ciProfileData* data = method_data()->bci_to_data(bci); 472 if (data != NULL && data->is_CounterData()) { 473 // Every profiled call site has a counter. 474 int count = data->as_CounterData()->count(); 475 476 if (!data->is_ReceiverTypeData()) { 477 result._receiver_count[0] = 0; // that's a definite zero 478 } else { // ReceiverTypeData is a subclass of CounterData 479 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 480 // In addition, virtual call sites have receiver type information 481 int receivers_count_total = 0; 482 int morphism = 0; 483 // Precompute morphism for the possible fixup 484 for (uint i = 0; i < call->row_limit(); i++) { 485 ciKlass* receiver = call->receiver(i); 486 if (receiver == NULL) continue; 487 morphism++; 488 } 489 int epsilon = 0; 490 if (TieredCompilation) { 491 // For a call, it is assumed that either the type of the receiver(s) 492 // is recorded or an associated counter is incremented, but not both. With 493 // tiered compilation, however, both can happen due to the interpreter and 494 // C1 profiling invocations differently. Address that inconsistency here. 495 if (morphism == 1 && count > 0) { 496 epsilon = count; 497 count = 0; 498 } 499 } 500 for (uint i = 0; i < call->row_limit(); i++) { 501 ciKlass* receiver = call->receiver(i); 502 if (receiver == NULL) continue; 503 int rcount = call->receiver_count(i) + epsilon; 504 if (rcount == 0) rcount = 1; // Should be valid value 505 receivers_count_total += rcount; 506 // Add the receiver to result data. 507 result.add_receiver(receiver, rcount); 508 // If we extend profiling to record methods, 509 // we will set result._method also. 510 } 511 // Determine call site's morphism. 512 // The call site count is 0 with known morphism (only 1 or 2 receivers) 513 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 514 // The call site count is > 0 in the case of a polymorphic virtual call. 515 if (morphism > 0 && morphism == result._limit) { 516 // The morphism <= MorphismLimit. 517 if ((morphism < ciCallProfile::MorphismLimit) || 518 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 519 #ifdef ASSERT 520 if (count > 0) { 521 this->print_short_name(tty); 522 tty->print_cr(" @ bci:%d", bci); 523 this->print_codes(); 524 assert(false, "this call site should not be polymorphic"); 525 } 526 #endif 527 result._morphism = morphism; 528 } 529 } 530 // Make the count consistent if this is a call profile. If count is 531 // zero or less, presume that this is a typecheck profile and 532 // do nothing. Otherwise, increase count to be the sum of all 533 // receiver's counts. 534 if (count >= 0) { 535 count += receivers_count_total; 536 } 537 } 538 result._count = count; 539 } 540 } 541 return result; 542 } 543 544 // ------------------------------------------------------------------ 545 // Add new receiver and sort data by receiver's profile count. 546 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 547 // Add new receiver and sort data by receiver's counts when we have space 548 // for it otherwise replace the less called receiver (less called receiver 549 // is placed to the last array element which is not used). 550 // First array's element contains most called receiver. 551 int i = _limit; 552 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 553 _receiver[i] = _receiver[i-1]; 554 _receiver_count[i] = _receiver_count[i-1]; 555 } 556 _receiver[i] = receiver; 557 _receiver_count[i] = receiver_count; 558 if (_limit < MorphismLimit) _limit++; 559 } 560 561 562 void ciMethod::assert_virtual_call_type_ok(int bci) { 563 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 564 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 565 } 566 567 void ciMethod::assert_call_type_ok(int bci) { 568 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 569 java_code_at_bci(bci) == Bytecodes::_invokespecial || 570 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 571 } 572 573 /** 574 * Check whether profiling provides a type for the argument i to the 575 * call at bci bci 576 * 577 * @param [in]bci bci of the call 578 * @param [in]i argument number 579 * @param [out]type profiled type of argument, NULL if none 580 * @param [out]ptr_kind whether always null, never null or maybe null 581 * @return true if profiling exists 582 * 583 */ 584 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 585 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 586 ciProfileData* data = method_data()->bci_to_data(bci); 587 if (data != NULL) { 588 if (data->is_VirtualCallTypeData()) { 589 assert_virtual_call_type_ok(bci); 590 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 591 if (i >= call->number_of_arguments()) { 592 return false; 593 } 594 type = call->valid_argument_type(i); 595 ptr_kind = call->argument_ptr_kind(i); 596 return true; 597 } else if (data->is_CallTypeData()) { 598 assert_call_type_ok(bci); 599 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 600 if (i >= call->number_of_arguments()) { 601 return false; 602 } 603 type = call->valid_argument_type(i); 604 ptr_kind = call->argument_ptr_kind(i); 605 return true; 606 } 607 } 608 } 609 return false; 610 } 611 612 /** 613 * Check whether profiling provides a type for the return value from 614 * the call at bci bci 615 * 616 * @param [in]bci bci of the call 617 * @param [out]type profiled type of argument, NULL if none 618 * @param [out]ptr_kind whether always null, never null or maybe null 619 * @return true if profiling exists 620 * 621 */ 622 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 623 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 624 ciProfileData* data = method_data()->bci_to_data(bci); 625 if (data != NULL) { 626 if (data->is_VirtualCallTypeData()) { 627 assert_virtual_call_type_ok(bci); 628 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 629 if (call->has_return()) { 630 type = call->valid_return_type(); 631 ptr_kind = call->return_ptr_kind(); 632 return true; 633 } 634 } else if (data->is_CallTypeData()) { 635 assert_call_type_ok(bci); 636 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 637 if (call->has_return()) { 638 type = call->valid_return_type(); 639 ptr_kind = call->return_ptr_kind(); 640 } 641 return true; 642 } 643 } 644 } 645 return false; 646 } 647 648 /** 649 * Check whether profiling provides a type for the parameter i 650 * 651 * @param [in]i parameter number 652 * @param [out]type profiled type of parameter, NULL if none 653 * @param [out]ptr_kind whether always null, never null or maybe null 654 * @return true if profiling exists 655 * 656 */ 657 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 658 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 659 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 660 if (parameters != NULL && i < parameters->number_of_parameters()) { 661 type = parameters->valid_parameter_type(i); 662 ptr_kind = parameters->parameter_ptr_kind(i); 663 return true; 664 } 665 } 666 return false; 667 } 668 669 670 // ------------------------------------------------------------------ 671 // ciMethod::find_monomorphic_target 672 // 673 // Given a certain calling environment, find the monomorphic target 674 // for the call. Return NULL if the call is not monomorphic in 675 // its calling environment, or if there are only abstract methods. 676 // The returned method is never abstract. 677 // Note: If caller uses a non-null result, it must inform dependencies 678 // via assert_unique_concrete_method or assert_leaf_type. 679 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 680 ciInstanceKlass* callee_holder, 681 ciInstanceKlass* actual_recv, 682 bool check_access) { 683 check_is_loaded(); 684 685 if (actual_recv->is_interface()) { 686 // %%% We cannot trust interface types, yet. See bug 6312651. 687 return NULL; 688 } 689 690 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 691 if (root_m == NULL) { 692 // Something went wrong looking up the actual receiver method. 693 return NULL; 694 } 695 assert(!root_m->is_abstract(), "resolve_invoke promise"); 696 697 // Make certain quick checks even if UseCHA is false. 698 699 // Is it private or final? 700 if (root_m->can_be_statically_bound()) { 701 return root_m; 702 } 703 704 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 705 // Easy case. There is no other place to put a method, so don't bother 706 // to go through the VM_ENTRY_MARK and all the rest. 707 return root_m; 708 } 709 710 // Array methods (clone, hashCode, etc.) are always statically bound. 711 // If we were to see an array type here, we'd return root_m. 712 // However, this method processes only ciInstanceKlasses. (See 4962591.) 713 // The inline_native_clone intrinsic narrows Object to T[] properly, 714 // so there is no need to do the same job here. 715 716 if (!UseCHA) return NULL; 717 718 VM_ENTRY_MARK; 719 720 // Disable CHA for default methods for now 721 if (root_m->get_Method()->is_default_method()) { 722 return NULL; 723 } 724 725 methodHandle target; 726 { 727 MutexLocker locker(Compile_lock); 728 Klass* context = actual_recv->get_Klass(); 729 target = Dependencies::find_unique_concrete_method(context, 730 root_m->get_Method()); 731 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 732 } 733 734 #ifndef PRODUCT 735 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 736 tty->print("found a non-root unique target method"); 737 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 738 tty->print(" method = "); 739 target->print_short_name(tty); 740 tty->cr(); 741 } 742 #endif //PRODUCT 743 744 if (target() == NULL) { 745 return NULL; 746 } 747 if (target() == root_m->get_Method()) { 748 return root_m; 749 } 750 if (!root_m->is_public() && 751 !root_m->is_protected()) { 752 // If we are going to reason about inheritance, it's easiest 753 // if the method in question is public, protected, or private. 754 // If the answer is not root_m, it is conservatively correct 755 // to return NULL, even if the CHA encountered irrelevant 756 // methods in other packages. 757 // %%% TO DO: Work out logic for package-private methods 758 // with the same name but different vtable indexes. 759 return NULL; 760 } 761 return CURRENT_THREAD_ENV->get_method(target()); 762 } 763 764 // ------------------------------------------------------------------ 765 // ciMethod::resolve_invoke 766 // 767 // Given a known receiver klass, find the target for the call. 768 // Return NULL if the call has no target or the target is abstract. 769 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 770 check_is_loaded(); 771 VM_ENTRY_MARK; 772 773 Klass* caller_klass = caller->get_Klass(); 774 Klass* recv = exact_receiver->get_Klass(); 775 Klass* resolved = holder()->get_Klass(); 776 Symbol* h_name = name()->get_symbol(); 777 Symbol* h_signature = signature()->get_symbol(); 778 779 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 780 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 781 methodHandle m; 782 // Only do exact lookup if receiver klass has been linked. Otherwise, 783 // the vtable has not been setup, and the LinkResolver will fail. 784 if (recv->is_array_klass() 785 || 786 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 787 if (holder()->is_interface()) { 788 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 789 } else { 790 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info); 791 } 792 } 793 794 if (m.is_null()) { 795 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 796 return NULL; 797 } 798 799 ciMethod* result = this; 800 if (m() != get_Method()) { 801 result = CURRENT_THREAD_ENV->get_method(m()); 802 } 803 804 // Don't return abstract methods because they aren't 805 // optimizable or interesting. 806 if (result->is_abstract()) { 807 return NULL; 808 } else { 809 return result; 810 } 811 } 812 813 // ------------------------------------------------------------------ 814 // ciMethod::resolve_vtable_index 815 // 816 // Given a known receiver klass, find the vtable index for the call. 817 // Return Method::invalid_vtable_index if the vtable_index is unknown. 818 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 819 check_is_loaded(); 820 821 int vtable_index = Method::invalid_vtable_index; 822 // Only do lookup if receiver klass has been linked. Otherwise, 823 // the vtable has not been setup, and the LinkResolver will fail. 824 if (!receiver->is_interface() 825 && (!receiver->is_instance_klass() || 826 receiver->as_instance_klass()->is_linked())) { 827 VM_ENTRY_MARK; 828 829 Klass* caller_klass = caller->get_Klass(); 830 Klass* recv = receiver->get_Klass(); 831 Symbol* h_name = name()->get_symbol(); 832 Symbol* h_signature = signature()->get_symbol(); 833 834 LinkInfo link_info(recv, h_name, h_signature, caller_klass); 835 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info); 836 if (vtable_index == Method::nonvirtual_vtable_index) { 837 // A statically bound method. Return "no such index". 838 vtable_index = Method::invalid_vtable_index; 839 } 840 } 841 842 return vtable_index; 843 } 844 845 // ------------------------------------------------------------------ 846 // ciMethod::interpreter_call_site_count 847 int ciMethod::interpreter_call_site_count(int bci) { 848 if (method_data() != NULL) { 849 ResourceMark rm; 850 ciProfileData* data = method_data()->bci_to_data(bci); 851 if (data != NULL && data->is_CounterData()) { 852 return scale_count(data->as_CounterData()->count()); 853 } 854 } 855 return -1; // unknown 856 } 857 858 // ------------------------------------------------------------------ 859 // ciMethod::get_field_at_bci 860 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 861 ciBytecodeStream iter(this); 862 iter.reset_to_bci(bci); 863 iter.next(); 864 return iter.get_field(will_link); 865 } 866 867 // ------------------------------------------------------------------ 868 // ciMethod::get_method_at_bci 869 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 870 ciBytecodeStream iter(this); 871 iter.reset_to_bci(bci); 872 iter.next(); 873 return iter.get_method(will_link, declared_signature); 874 } 875 876 // ------------------------------------------------------------------ 877 // Adjust a CounterData count to be commensurate with 878 // interpreter_invocation_count. If the MDO exists for 879 // only 25% of the time the method exists, then the 880 // counts in the MDO should be scaled by 4X, so that 881 // they can be usefully and stably compared against the 882 // invocation counts in methods. 883 int ciMethod::scale_count(int count, float prof_factor) { 884 if (count > 0 && method_data() != NULL) { 885 int counter_life; 886 int method_life = interpreter_invocation_count(); 887 if (TieredCompilation) { 888 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 889 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 890 } else { 891 int current_mileage = method_data()->current_mileage(); 892 int creation_mileage = method_data()->creation_mileage(); 893 counter_life = current_mileage - creation_mileage; 894 } 895 896 // counter_life due to backedge_counter could be > method_life 897 if (counter_life > method_life) 898 counter_life = method_life; 899 if (0 < counter_life && counter_life <= method_life) { 900 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 901 count = (count > 0) ? count : 1; 902 } 903 } 904 return count; 905 } 906 907 908 // ------------------------------------------------------------------ 909 // ciMethod::is_special_get_caller_class_method 910 // 911 bool ciMethod::is_ignored_by_security_stack_walk() const { 912 check_is_loaded(); 913 VM_ENTRY_MARK; 914 return get_Method()->is_ignored_by_security_stack_walk(); 915 } 916 917 918 // ------------------------------------------------------------------ 919 // invokedynamic support 920 921 // ------------------------------------------------------------------ 922 // ciMethod::is_method_handle_intrinsic 923 // 924 // Return true if the method is an instance of the JVM-generated 925 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 926 bool ciMethod::is_method_handle_intrinsic() const { 927 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 928 return (MethodHandles::is_signature_polymorphic(iid) && 929 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 930 } 931 932 // ------------------------------------------------------------------ 933 // ciMethod::is_compiled_lambda_form 934 // 935 // Return true if the method is a generated MethodHandle adapter. 936 // These are built by Java code. 937 bool ciMethod::is_compiled_lambda_form() const { 938 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 939 return iid == vmIntrinsics::_compiledLambdaForm; 940 } 941 942 // ------------------------------------------------------------------ 943 // ciMethod::is_object_initializer 944 // 945 bool ciMethod::is_object_initializer() const { 946 return name() == ciSymbol::object_initializer_name(); 947 } 948 949 // ------------------------------------------------------------------ 950 // ciMethod::has_member_arg 951 // 952 // Return true if the method is a linker intrinsic like _linkToVirtual. 953 // These are built by the JVM. 954 bool ciMethod::has_member_arg() const { 955 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 956 return (MethodHandles::is_signature_polymorphic(iid) && 957 MethodHandles::has_member_arg(iid)); 958 } 959 960 // ------------------------------------------------------------------ 961 // ciMethod::ensure_method_data 962 // 963 // Generate new MethodData* objects at compile time. 964 // Return true if allocation was successful or no MDO is required. 965 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 966 EXCEPTION_CONTEXT; 967 if (is_native() || is_abstract() || h_m()->is_accessor()) { 968 return true; 969 } 970 if (h_m()->method_data() == NULL) { 971 Method::build_interpreter_method_data(h_m, THREAD); 972 if (HAS_PENDING_EXCEPTION) { 973 CLEAR_PENDING_EXCEPTION; 974 } 975 } 976 if (h_m()->method_data() != NULL) { 977 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 978 _method_data->load_data(); 979 return true; 980 } else { 981 _method_data = CURRENT_ENV->get_empty_methodData(); 982 return false; 983 } 984 } 985 986 // public, retroactive version 987 bool ciMethod::ensure_method_data() { 988 bool result = true; 989 if (_method_data == NULL || _method_data->is_empty()) { 990 GUARDED_VM_ENTRY({ 991 result = ensure_method_data(get_Method()); 992 }); 993 } 994 return result; 995 } 996 997 998 // ------------------------------------------------------------------ 999 // ciMethod::method_data 1000 // 1001 ciMethodData* ciMethod::method_data() { 1002 if (_method_data != NULL) { 1003 return _method_data; 1004 } 1005 VM_ENTRY_MARK; 1006 ciEnv* env = CURRENT_ENV; 1007 Thread* my_thread = JavaThread::current(); 1008 methodHandle h_m(my_thread, get_Method()); 1009 1010 if (h_m()->method_data() != NULL) { 1011 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1012 _method_data->load_data(); 1013 } else { 1014 _method_data = CURRENT_ENV->get_empty_methodData(); 1015 } 1016 return _method_data; 1017 1018 } 1019 1020 // ------------------------------------------------------------------ 1021 // ciMethod::method_data_or_null 1022 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1023 // NULL otherwise. 1024 ciMethodData* ciMethod::method_data_or_null() { 1025 ciMethodData *md = method_data(); 1026 if (md->is_empty()) { 1027 return NULL; 1028 } 1029 return md; 1030 } 1031 1032 // ------------------------------------------------------------------ 1033 // ciMethod::ensure_method_counters 1034 // 1035 MethodCounters* ciMethod::ensure_method_counters() { 1036 check_is_loaded(); 1037 VM_ENTRY_MARK; 1038 methodHandle mh(THREAD, get_Method()); 1039 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1040 return method_counters; 1041 } 1042 1043 // ------------------------------------------------------------------ 1044 // ciMethod::has_option 1045 // 1046 bool ciMethod::has_option(const char* option) { 1047 check_is_loaded(); 1048 VM_ENTRY_MARK; 1049 methodHandle mh(THREAD, get_Method()); 1050 return CompilerOracle::has_option_string(mh, option); 1051 } 1052 1053 // ------------------------------------------------------------------ 1054 // ciMethod::has_option_value 1055 // 1056 bool ciMethod::has_option_value(const char* option, double& value) { 1057 check_is_loaded(); 1058 VM_ENTRY_MARK; 1059 methodHandle mh(THREAD, get_Method()); 1060 return CompilerOracle::has_option_value(mh, option, value); 1061 } 1062 // ------------------------------------------------------------------ 1063 // ciMethod::can_be_compiled 1064 // 1065 // Have previous compilations of this method succeeded? 1066 bool ciMethod::can_be_compiled() { 1067 check_is_loaded(); 1068 ciEnv* env = CURRENT_ENV; 1069 if (is_c1_compile(env->comp_level())) { 1070 return _is_c1_compilable; 1071 } 1072 return _is_c2_compilable; 1073 } 1074 1075 // ------------------------------------------------------------------ 1076 // ciMethod::set_not_compilable 1077 // 1078 // Tell the VM that this method cannot be compiled at all. 1079 void ciMethod::set_not_compilable(const char* reason) { 1080 check_is_loaded(); 1081 VM_ENTRY_MARK; 1082 ciEnv* env = CURRENT_ENV; 1083 if (is_c1_compile(env->comp_level())) { 1084 _is_c1_compilable = false; 1085 } else { 1086 _is_c2_compilable = false; 1087 } 1088 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1089 } 1090 1091 // ------------------------------------------------------------------ 1092 // ciMethod::can_be_osr_compiled 1093 // 1094 // Have previous compilations of this method succeeded? 1095 // 1096 // Implementation note: the VM does not currently keep track 1097 // of failed OSR compilations per bci. The entry_bci parameter 1098 // is currently unused. 1099 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1100 check_is_loaded(); 1101 VM_ENTRY_MARK; 1102 ciEnv* env = CURRENT_ENV; 1103 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1104 } 1105 1106 // ------------------------------------------------------------------ 1107 // ciMethod::has_compiled_code 1108 bool ciMethod::has_compiled_code() { 1109 return instructions_size() > 0; 1110 } 1111 1112 int ciMethod::comp_level() { 1113 check_is_loaded(); 1114 VM_ENTRY_MARK; 1115 CompiledMethod* nm = get_Method()->code(); 1116 if (nm != NULL) return nm->comp_level(); 1117 return 0; 1118 } 1119 1120 int ciMethod::highest_osr_comp_level() { 1121 check_is_loaded(); 1122 VM_ENTRY_MARK; 1123 return get_Method()->highest_osr_comp_level(); 1124 } 1125 1126 // ------------------------------------------------------------------ 1127 // ciMethod::code_size_for_inlining 1128 // 1129 // Code size for inlining decisions. This method returns a code 1130 // size of 1 for methods which has the ForceInline annotation. 1131 int ciMethod::code_size_for_inlining() { 1132 check_is_loaded(); 1133 if (get_Method()->force_inline()) { 1134 return 1; 1135 } 1136 return code_size(); 1137 } 1138 1139 // ------------------------------------------------------------------ 1140 // ciMethod::instructions_size 1141 // 1142 // This is a rough metric for "fat" methods, compared before inlining 1143 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1144 // junk like exception handler, stubs, and constant table, which are 1145 // not highly relevant to an inlined method. So we use the more 1146 // specific accessor nmethod::insts_size. 1147 int ciMethod::instructions_size() { 1148 if (_instructions_size == -1) { 1149 GUARDED_VM_ENTRY( 1150 CompiledMethod* code = get_Method()->code(); 1151 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1152 _instructions_size = code->insts_end() - code->verified_entry_point(); 1153 } else { 1154 _instructions_size = 0; 1155 } 1156 ); 1157 } 1158 return _instructions_size; 1159 } 1160 1161 // ------------------------------------------------------------------ 1162 // ciMethod::log_nmethod_identity 1163 void ciMethod::log_nmethod_identity(xmlStream* log) { 1164 GUARDED_VM_ENTRY( 1165 CompiledMethod* code = get_Method()->code(); 1166 if (code != NULL) { 1167 code->log_identity(log); 1168 } 1169 ) 1170 } 1171 1172 // ------------------------------------------------------------------ 1173 // ciMethod::is_not_reached 1174 bool ciMethod::is_not_reached(int bci) { 1175 check_is_loaded(); 1176 VM_ENTRY_MARK; 1177 return Interpreter::is_not_reached( 1178 methodHandle(THREAD, get_Method()), bci); 1179 } 1180 1181 // ------------------------------------------------------------------ 1182 // ciMethod::was_never_executed 1183 bool ciMethod::was_executed_more_than(int times) { 1184 VM_ENTRY_MARK; 1185 return get_Method()->was_executed_more_than(times); 1186 } 1187 1188 // ------------------------------------------------------------------ 1189 // ciMethod::has_unloaded_classes_in_signature 1190 bool ciMethod::has_unloaded_classes_in_signature() { 1191 VM_ENTRY_MARK; 1192 { 1193 EXCEPTION_MARK; 1194 methodHandle m(THREAD, get_Method()); 1195 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1196 if( HAS_PENDING_EXCEPTION ) { 1197 CLEAR_PENDING_EXCEPTION; 1198 return true; // Declare that we may have unloaded classes 1199 } 1200 return has_unloaded; 1201 } 1202 } 1203 1204 // ------------------------------------------------------------------ 1205 // ciMethod::is_klass_loaded 1206 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1207 VM_ENTRY_MARK; 1208 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1209 } 1210 1211 // ------------------------------------------------------------------ 1212 // ciMethod::check_call 1213 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1214 // This method is used only in C2 from InlineTree::ok_to_inline, 1215 // and is only used under -Xcomp. 1216 // It appears to fail when applied to an invokeinterface call site. 1217 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1218 VM_ENTRY_MARK; 1219 { 1220 EXCEPTION_MARK; 1221 HandleMark hm(THREAD); 1222 constantPoolHandle pool (THREAD, get_Method()->constants()); 1223 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1224 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1225 if (HAS_PENDING_EXCEPTION) { 1226 CLEAR_PENDING_EXCEPTION; 1227 return false; 1228 } else { 1229 return (spec_method->is_static() == is_static); 1230 } 1231 } 1232 return false; 1233 } 1234 1235 // ------------------------------------------------------------------ 1236 // ciMethod::profile_aging 1237 // 1238 // Should the method be compiled with an age counter? 1239 bool ciMethod::profile_aging() const { 1240 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1241 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1242 } 1243 // ------------------------------------------------------------------ 1244 // ciMethod::print_codes 1245 // 1246 // Print the bytecodes for this method. 1247 void ciMethod::print_codes_on(outputStream* st) { 1248 check_is_loaded(); 1249 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1250 } 1251 1252 1253 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1254 check_is_loaded(); \ 1255 VM_ENTRY_MARK; \ 1256 return get_Method()->flag_accessor(); \ 1257 } 1258 1259 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1260 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1261 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1262 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1263 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1264 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1265 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1266 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1267 1268 bool ciMethod::is_boxing_method() const { 1269 if (holder()->is_box_klass()) { 1270 switch (intrinsic_id()) { 1271 case vmIntrinsics::_Boolean_valueOf: 1272 case vmIntrinsics::_Byte_valueOf: 1273 case vmIntrinsics::_Character_valueOf: 1274 case vmIntrinsics::_Short_valueOf: 1275 case vmIntrinsics::_Integer_valueOf: 1276 case vmIntrinsics::_Long_valueOf: 1277 case vmIntrinsics::_Float_valueOf: 1278 case vmIntrinsics::_Double_valueOf: 1279 return true; 1280 default: 1281 return false; 1282 } 1283 } 1284 return false; 1285 } 1286 1287 bool ciMethod::is_unboxing_method() const { 1288 if (holder()->is_box_klass()) { 1289 switch (intrinsic_id()) { 1290 case vmIntrinsics::_booleanValue: 1291 case vmIntrinsics::_byteValue: 1292 case vmIntrinsics::_charValue: 1293 case vmIntrinsics::_shortValue: 1294 case vmIntrinsics::_intValue: 1295 case vmIntrinsics::_longValue: 1296 case vmIntrinsics::_floatValue: 1297 case vmIntrinsics::_doubleValue: 1298 return true; 1299 default: 1300 return false; 1301 } 1302 } 1303 return false; 1304 } 1305 1306 BCEscapeAnalyzer *ciMethod::get_bcea() { 1307 #ifdef COMPILER2 1308 if (_bcea == NULL) { 1309 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1310 } 1311 return _bcea; 1312 #else // COMPILER2 1313 ShouldNotReachHere(); 1314 return NULL; 1315 #endif // COMPILER2 1316 } 1317 1318 ciMethodBlocks *ciMethod::get_method_blocks() { 1319 Arena *arena = CURRENT_ENV->arena(); 1320 if (_method_blocks == NULL) { 1321 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1322 } 1323 return _method_blocks; 1324 } 1325 1326 #undef FETCH_FLAG_FROM_VM 1327 1328 void ciMethod::dump_name_as_ascii(outputStream* st) { 1329 Method* method = get_Method(); 1330 st->print("%s %s %s", 1331 method->klass_name()->as_quoted_ascii(), 1332 method->name()->as_quoted_ascii(), 1333 method->signature()->as_quoted_ascii()); 1334 } 1335 1336 void ciMethod::dump_replay_data(outputStream* st) { 1337 ResourceMark rm; 1338 Method* method = get_Method(); 1339 MethodCounters* mcs = method->method_counters(); 1340 st->print("ciMethod "); 1341 dump_name_as_ascii(st); 1342 st->print_cr(" %d %d %d %d %d", 1343 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1344 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1345 interpreter_invocation_count(), 1346 interpreter_throwout_count(), 1347 _instructions_size); 1348 } 1349 1350 // ------------------------------------------------------------------ 1351 // ciMethod::print_codes 1352 // 1353 // Print a range of the bytecodes for this method. 1354 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1355 check_is_loaded(); 1356 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1357 } 1358 1359 // ------------------------------------------------------------------ 1360 // ciMethod::print_name 1361 // 1362 // Print the name of this method, including signature and some flags. 1363 void ciMethod::print_name(outputStream* st) { 1364 check_is_loaded(); 1365 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1366 } 1367 1368 // ------------------------------------------------------------------ 1369 // ciMethod::print_short_name 1370 // 1371 // Print the name of this method, without signature. 1372 void ciMethod::print_short_name(outputStream* st) { 1373 if (is_loaded()) { 1374 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1375 } else { 1376 // Fall back if method is not loaded. 1377 holder()->print_name_on(st); 1378 st->print("::"); 1379 name()->print_symbol_on(st); 1380 if (WizardMode) 1381 signature()->as_symbol()->print_symbol_on(st); 1382 } 1383 } 1384 1385 // ------------------------------------------------------------------ 1386 // ciMethod::print_impl 1387 // 1388 // Implementation of the print method. 1389 void ciMethod::print_impl(outputStream* st) { 1390 ciMetadata::print_impl(st); 1391 st->print(" name="); 1392 name()->print_symbol_on(st); 1393 st->print(" holder="); 1394 holder()->print_name_on(st); 1395 st->print(" signature="); 1396 signature()->as_symbol()->print_symbol_on(st); 1397 if (is_loaded()) { 1398 st->print(" loaded=true"); 1399 st->print(" arg_size=%d", arg_size()); 1400 st->print(" flags="); 1401 flags().print_member_flags(st); 1402 } else { 1403 st->print(" loaded=false"); 1404 } 1405 } 1406 1407 // ------------------------------------------------------------------ 1408 1409 static BasicType erase_to_word_type(BasicType bt) { 1410 if (is_subword_type(bt)) return T_INT; 1411 if (bt == T_ARRAY) return T_OBJECT; 1412 return bt; 1413 } 1414 1415 static bool basic_types_match(ciType* t1, ciType* t2) { 1416 if (t1 == t2) return true; 1417 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1418 } 1419 1420 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1421 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1422 !resolved_method->is_method_handle_intrinsic(); 1423 1424 if (!invoke_through_mh_intrinsic) { 1425 // Method name & descriptor should stay the same. 1426 // Signatures may reference unloaded types and thus they may be not strictly equal. 1427 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1428 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1429 1430 return (declared_method->name()->equals(resolved_method->name())) && 1431 (declared_signature->equals(resolved_signature)); 1432 } 1433 1434 ciMethod* linker = declared_method; 1435 ciMethod* target = resolved_method; 1436 // Linkers have appendix argument which is not passed to callee. 1437 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1438 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1439 return false; // argument slot count mismatch 1440 } 1441 1442 ciSignature* linker_sig = linker->signature(); 1443 ciSignature* target_sig = target->signature(); 1444 1445 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1446 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1447 return false; // argument count mismatch 1448 } 1449 1450 int sbase = 0, rbase = 0; 1451 switch (linker->intrinsic_id()) { 1452 case vmIntrinsics::_linkToVirtual: 1453 case vmIntrinsics::_linkToInterface: 1454 case vmIntrinsics::_linkToSpecial: { 1455 if (target->is_static()) { 1456 return false; 1457 } 1458 if (linker_sig->type_at(0)->is_primitive_type()) { 1459 return false; // receiver should be an oop 1460 } 1461 sbase = 1; // skip receiver 1462 break; 1463 } 1464 case vmIntrinsics::_linkToStatic: { 1465 if (!target->is_static()) { 1466 return false; 1467 } 1468 break; 1469 } 1470 case vmIntrinsics::_invokeBasic: { 1471 if (target->is_static()) { 1472 if (target_sig->type_at(0)->is_primitive_type()) { 1473 return false; // receiver should be an oop 1474 } 1475 rbase = 1; // skip receiver 1476 } 1477 break; 1478 } 1479 default: 1480 break; 1481 } 1482 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1483 int arg_count = target_sig->count() - rbase; 1484 for (int i = 0; i < arg_count; i++) { 1485 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1486 return false; 1487 } 1488 } 1489 // Only check the return type if the symbolic info has non-void return type. 1490 // I.e. the return value of the resolved method can be dropped. 1491 if (!linker->return_type()->is_void() && 1492 !basic_types_match(linker->return_type(), target->return_type())) { 1493 return false; 1494 } 1495 return true; // no mismatch found 1496 } 1497 1498 // ------------------------------------------------------------------