1 /* 2 * Copyright (c) 1999, 2025, 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 "ci/ciCallProfile.hpp" 26 #include "ci/ciExceptionHandler.hpp" 27 #include "ci/ciInstanceKlass.hpp" 28 #include "ci/ciMethod.hpp" 29 #include "ci/ciMethodBlocks.hpp" 30 #include "ci/ciMethodData.hpp" 31 #include "ci/ciReplay.hpp" 32 #include "ci/ciStreams.hpp" 33 #include "ci/ciSymbol.hpp" 34 #include "ci/ciSymbols.hpp" 35 #include "ci/ciUtilities.inline.hpp" 36 #include "compiler/abstractCompiler.hpp" 37 #include "compiler/compilerDefinitions.inline.hpp" 38 #include "compiler/compilerOracle.hpp" 39 #include "compiler/compileTask.hpp" 40 #include "compiler/methodLiveness.hpp" 41 #include "interpreter/interpreter.hpp" 42 #include "interpreter/linkResolver.hpp" 43 #include "interpreter/oopMapCache.hpp" 44 #include "logging/log.hpp" 45 #include "logging/logStream.hpp" 46 #include "memory/allocation.inline.hpp" 47 #include "memory/resourceArea.hpp" 48 #include "oops/generateOopMap.hpp" 49 #include "oops/method.inline.hpp" 50 #include "oops/oop.inline.hpp" 51 #include "oops/trainingData.hpp" 52 #include "prims/methodHandles.hpp" 53 #include "runtime/deoptimization.hpp" 54 #include "runtime/handles.inline.hpp" 55 #include "runtime/sharedRuntime.hpp" 56 #include "utilities/bitMap.inline.hpp" 57 #include "utilities/xmlstream.hpp" 58 #ifdef COMPILER2 59 #include "ci/bcEscapeAnalyzer.hpp" 60 #include "ci/ciTypeFlow.hpp" 61 #include "oops/method.hpp" 62 #endif 63 64 // ciMethod 65 // 66 // This class represents a Method* in the HotSpot virtual 67 // machine. 68 69 70 // ------------------------------------------------------------------ 71 // ciMethod::ciMethod 72 // 73 // Loaded method. 74 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 75 ciMetadata(h_m()), 76 _holder(holder) 77 { 78 assert(h_m() != nullptr, "no null method"); 79 assert(_holder->get_instanceKlass() == h_m->method_holder(), ""); 80 81 // These fields are always filled in in loaded methods. 82 _flags = ciFlags(h_m->access_flags()); 83 84 // Easy to compute, so fill them in now. 85 _max_stack = h_m->max_stack(); 86 _max_locals = h_m->max_locals(); 87 _code_size = h_m->code_size(); 88 _handler_count = h_m->exception_table_length(); 89 _size_of_parameters = h_m->size_of_parameters(); 90 _uses_monitors = h_m->has_monitor_bytecodes(); 91 _balanced_monitors = !_uses_monitors || h_m->guaranteed_monitor_matching(); 92 _is_c1_compilable = !h_m->is_not_c1_compilable(); 93 _is_c2_compilable = !h_m->is_not_c2_compilable(); 94 _can_be_parsed = true; 95 _has_reserved_stack_access = h_m->has_reserved_stack_access(); 96 _is_overpass = h_m->is_overpass(); 97 // Lazy fields, filled in on demand. Require allocation. 98 _code = nullptr; 99 _exception_handlers = nullptr; 100 _liveness = nullptr; 101 _method_blocks = nullptr; 102 #if defined(COMPILER2) 103 _flow = nullptr; 104 _bcea = nullptr; 105 #endif // COMPILER2 106 107 // Check for blackhole intrinsic and then populate the intrinsic ID. 108 CompilerOracle::tag_blackhole_if_possible(h_m); 109 _intrinsic_id = h_m->intrinsic_id(); 110 111 ciEnv *env = CURRENT_ENV; 112 if (env->jvmti_can_hotswap_or_post_breakpoint()) { 113 // 6328518 check hotswap conditions under the right lock. 114 bool should_take_Compile_lock = !Compile_lock->owned_by_self(); 115 ConditionalMutexLocker locker(Compile_lock, should_take_Compile_lock, Mutex::_safepoint_check_flag); 116 if (Dependencies::check_evol_method(h_m()) != nullptr) { 117 _is_c1_compilable = false; 118 _is_c2_compilable = false; 119 _can_be_parsed = false; 120 } 121 } else { 122 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint()); 123 } 124 125 if (h_m->method_holder()->is_linked()) { 126 _can_be_statically_bound = h_m->can_be_statically_bound(); 127 _can_omit_stack_trace = h_m->can_omit_stack_trace(); 128 } else { 129 // Have to use a conservative value in this case. 130 _can_be_statically_bound = false; 131 _can_omit_stack_trace = true; 132 } 133 134 // Adjust the definition of this condition to be more useful: 135 // %%% take these conditions into account in vtable generation 136 if (!_can_be_statically_bound && h_m->is_private()) 137 _can_be_statically_bound = true; 138 if (_can_be_statically_bound && h_m->is_abstract()) 139 _can_be_statically_bound = false; 140 141 // generating _signature may allow GC and therefore move m. 142 // These fields are always filled in. 143 _name = env->get_symbol(h_m->name()); 144 ciSymbol* sig_symbol = env->get_symbol(h_m->signature()); 145 constantPoolHandle cpool(Thread::current(), h_m->constants()); 146 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 147 _method_data = nullptr; 148 // Take a snapshot of these values, so they will be commensurate with the MDO. 149 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) { 150 int invcnt = h_m->interpreter_invocation_count(); 151 // if the value overflowed report it as max int 152 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 153 _interpreter_throwout_count = h_m->interpreter_throwout_count(); 154 } else { 155 _interpreter_invocation_count = 0; 156 _interpreter_throwout_count = 0; 157 } 158 if (_interpreter_invocation_count == 0) 159 _interpreter_invocation_count = 1; 160 _inline_instructions_size = -1; 161 if (ReplayCompiles) { 162 ciReplay::initialize(this); 163 } 164 } 165 166 167 // ------------------------------------------------------------------ 168 // ciMethod::ciMethod 169 // 170 // Unloaded method. 171 ciMethod::ciMethod(ciInstanceKlass* holder, 172 ciSymbol* name, 173 ciSymbol* signature, 174 ciInstanceKlass* accessor) : 175 ciMetadata((Metadata*)nullptr), 176 _name( name), 177 _holder( holder), 178 _method_data( nullptr), 179 _method_blocks( nullptr), 180 _intrinsic_id( vmIntrinsics::_none), 181 _inline_instructions_size(-1), 182 _can_be_statically_bound(false), 183 _can_omit_stack_trace(true), 184 _liveness( nullptr) 185 #if defined(COMPILER2) 186 , 187 _flow( nullptr), 188 _bcea( nullptr) 189 #endif // COMPILER2 190 { 191 // Usually holder and accessor are the same type but in some cases 192 // the holder has the wrong class loader (e.g. invokedynamic call 193 // sites) so we pass the accessor. 194 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 195 } 196 197 198 // ------------------------------------------------------------------ 199 // ciMethod::load_code 200 // 201 // Load the bytecodes and exception handler table for this method. 202 void ciMethod::load_code() { 203 VM_ENTRY_MARK; 204 assert(is_loaded(), "only loaded methods have code"); 205 206 Method* me = get_Method(); 207 Arena* arena = CURRENT_THREAD_ENV->arena(); 208 209 // Load the bytecodes. 210 _code = (address)arena->Amalloc(code_size()); 211 memcpy(_code, me->code_base(), code_size()); 212 213 #if INCLUDE_JVMTI 214 // Revert any breakpoint bytecodes in ci's copy 215 if (me->number_of_breakpoints() > 0) { 216 BreakpointInfo* bp = me->method_holder()->breakpoints(); 217 for (; bp != nullptr; bp = bp->next()) { 218 if (bp->match(me)) { 219 code_at_put(bp->bci(), bp->orig_bytecode()); 220 } 221 } 222 } 223 #endif 224 225 // And load the exception table. 226 ExceptionTable exc_table(me); 227 228 // Allocate one extra spot in our list of exceptions. This 229 // last entry will be used to represent the possibility that 230 // an exception escapes the method. See ciExceptionHandlerStream 231 // for details. 232 _exception_handlers = 233 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 234 * (_handler_count + 1)); 235 if (_handler_count > 0) { 236 for (int i=0; i<_handler_count; i++) { 237 _exception_handlers[i] = new (arena) ciExceptionHandler( 238 holder(), 239 /* start */ exc_table.start_pc(i), 240 /* limit */ exc_table.end_pc(i), 241 /* goto pc */ exc_table.handler_pc(i), 242 /* cp index */ exc_table.catch_type_index(i)); 243 } 244 } 245 246 // Put an entry at the end of our list to represent the possibility 247 // of exceptional exit. 248 _exception_handlers[_handler_count] = 249 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 250 251 if (CIPrintMethodCodes) { 252 print_codes(); 253 } 254 } 255 256 257 // ------------------------------------------------------------------ 258 // ciMethod::has_linenumber_table 259 // 260 // length unknown until decompression 261 bool ciMethod::has_linenumber_table() const { 262 check_is_loaded(); 263 VM_ENTRY_MARK; 264 return get_Method()->has_linenumber_table(); 265 } 266 267 268 // ------------------------------------------------------------------ 269 // ciMethod::line_number_from_bci 270 int ciMethod::line_number_from_bci(int bci) const { 271 check_is_loaded(); 272 VM_ENTRY_MARK; 273 return get_Method()->line_number_from_bci(bci); 274 } 275 276 277 // ------------------------------------------------------------------ 278 // ciMethod::vtable_index 279 // 280 // Get the position of this method's entry in the vtable, if any. 281 int ciMethod::vtable_index() { 282 check_is_loaded(); 283 assert(holder()->is_linked(), "must be linked"); 284 VM_ENTRY_MARK; 285 return get_Method()->vtable_index(); 286 } 287 288 // ------------------------------------------------------------------ 289 // ciMethod::uses_balanced_monitors 290 // 291 // Does this method use monitors in a strict stack-disciplined manner? 292 bool ciMethod::has_balanced_monitors() { 293 check_is_loaded(); 294 if (_balanced_monitors) return true; 295 296 // Analyze the method to see if monitors are used properly. 297 VM_ENTRY_MARK; 298 methodHandle method(THREAD, get_Method()); 299 assert(method->has_monitor_bytecodes(), "should have checked this"); 300 301 // Check to see if a previous compilation computed the 302 // monitor-matching analysis. 303 if (method->guaranteed_monitor_matching()) { 304 _balanced_monitors = true; 305 return true; 306 } 307 308 { 309 ExceptionMark em(THREAD); 310 ResourceMark rm(THREAD); 311 GeneratePairingInfo gpi(method); 312 if (!gpi.compute_map(THREAD)) { 313 fatal("Unrecoverable verification or out-of-memory error"); 314 } 315 if (!gpi.monitor_safe()) { 316 return false; 317 } 318 method->set_guaranteed_monitor_matching(); 319 _balanced_monitors = true; 320 } 321 return true; 322 } 323 324 325 // ------------------------------------------------------------------ 326 // ciMethod::get_flow_analysis 327 ciTypeFlow* ciMethod::get_flow_analysis() { 328 #if defined(COMPILER2) 329 if (_flow == nullptr) { 330 ciEnv* env = CURRENT_ENV; 331 _flow = new (env->arena()) ciTypeFlow(env, this); 332 _flow->do_flow(); 333 } 334 return _flow; 335 #else // COMPILER2 336 ShouldNotReachHere(); 337 return nullptr; 338 #endif // COMPILER2 339 } 340 341 342 // ------------------------------------------------------------------ 343 // ciMethod::get_osr_flow_analysis 344 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 345 #if defined(COMPILER2) 346 // OSR entry points are always place after a call bytecode of some sort 347 assert(osr_bci >= 0, "must supply valid OSR entry point"); 348 ciEnv* env = CURRENT_ENV; 349 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 350 flow->do_flow(); 351 return flow; 352 #else // COMPILER2 353 ShouldNotReachHere(); 354 return nullptr; 355 #endif // COMPILER2 356 } 357 358 // ------------------------------------------------------------------ 359 // ciMethod::raw_liveness_at_bci 360 // 361 // Which local variables are live at a specific bci? 362 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 363 check_is_loaded(); 364 if (_liveness == nullptr) { 365 // Create the liveness analyzer. 366 Arena* arena = CURRENT_ENV->arena(); 367 _liveness = new (arena) MethodLiveness(arena, this); 368 _liveness->compute_liveness(); 369 } 370 return _liveness->get_liveness_at(bci); 371 } 372 373 // ------------------------------------------------------------------ 374 // ciMethod::liveness_at_bci 375 // 376 // Which local variables are live at a specific bci? When debugging 377 // will return true for all locals in some cases to improve debug 378 // information. 379 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 380 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) { 381 // Keep all locals live for the user's edification and amusement. 382 MethodLivenessResult result(_max_locals); 383 result.set_range(0, _max_locals); 384 result.set_is_valid(); 385 return result; 386 } 387 return raw_liveness_at_bci(bci); 388 } 389 390 // ciMethod::live_local_oops_at_bci 391 // 392 // find all the live oops in the locals array for a particular bci 393 // Compute what the interpreter believes by using the interpreter 394 // oopmap generator. This is used as a double check during osr to 395 // guard against conservative result from MethodLiveness making us 396 // think a dead oop is live. MethodLiveness is conservative in the 397 // sense that it may consider locals to be live which cannot be live, 398 // like in the case where a local could contain an oop or a primitive 399 // along different paths. In that case the local must be dead when 400 // those paths merge. Since the interpreter's viewpoint is used when 401 // gc'ing an interpreter frame we need to use its viewpoint during 402 // OSR when loading the locals. 403 404 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 405 VM_ENTRY_MARK; 406 InterpreterOopMap mask; 407 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask); 408 int mask_size = max_locals(); 409 ResourceBitMap result(mask_size); 410 int i; 411 for (i = 0; i < mask_size ; i++ ) { 412 if (mask.is_oop(i)) result.set_bit(i); 413 } 414 return result; 415 } 416 417 418 #ifdef COMPILER1 419 // ------------------------------------------------------------------ 420 // ciMethod::bci_block_start 421 // 422 // Marks all bcis where a new basic block starts 423 const BitMap& ciMethod::bci_block_start() { 424 check_is_loaded(); 425 if (_liveness == nullptr) { 426 // Create the liveness analyzer. 427 Arena* arena = CURRENT_ENV->arena(); 428 _liveness = new (arena) MethodLiveness(arena, this); 429 _liveness->compute_liveness(); 430 } 431 432 return _liveness->get_bci_block_start(); 433 } 434 #endif // COMPILER1 435 436 437 // ------------------------------------------------------------------ 438 // ciMethod::check_overflow 439 // 440 // Check whether the profile counter is overflowed and adjust if true. 441 // For invoke* it will turn negative values into max_jint, 442 // and for checkcast/aastore/instanceof turn positive values into min_jint. 443 int ciMethod::check_overflow(int c, Bytecodes::Code code) { 444 switch (code) { 445 case Bytecodes::_aastore: // fall-through 446 case Bytecodes::_checkcast: // fall-through 447 case Bytecodes::_instanceof: { 448 if (VM_Version::profile_all_receivers_at_type_check()) { 449 return (c < 0 ? max_jint : c); // always non-negative 450 } 451 return (c > 0 ? min_jint : c); // always non-positive 452 } 453 default: { 454 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code)); 455 return (c < 0 ? max_jint : c); // always non-negative 456 } 457 } 458 } 459 460 461 // ------------------------------------------------------------------ 462 // ciMethod::call_profile_at_bci 463 // 464 // Get the ciCallProfile for the invocation of this method. 465 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 466 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 467 ResourceMark rm; 468 ciCallProfile result; 469 if (method_data() != nullptr && method_data()->is_mature()) { 470 ciProfileData* data = method_data()->bci_to_data(bci); 471 if (data != nullptr && data->is_CounterData()) { 472 // Every profiled call site has a counter. 473 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci)); 474 475 if (!data->is_ReceiverTypeData()) { 476 result._receiver_count[0] = 0; // that's a definite zero 477 } else { // ReceiverTypeData is a subclass of CounterData 478 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 479 // In addition, virtual call sites have receiver type information 480 int receivers_count_total = 0; 481 int morphism = 0; 482 // Precompute morphism for the possible fixup 483 for (uint i = 0; i < call->row_limit(); i++) { 484 ciKlass* receiver = call->receiver(i); 485 if (receiver == nullptr) continue; 486 morphism++; 487 } 488 int epsilon = 0; 489 // For a call, it is assumed that either the type of the receiver(s) 490 // is recorded or an associated counter is incremented, but not both. With 491 // tiered compilation, however, both can happen due to the interpreter and 492 // C1 profiling invocations differently. Address that inconsistency here. 493 if (morphism == 1 && count > 0) { 494 epsilon = count; 495 count = 0; 496 } 497 for (uint i = 0; i < call->row_limit(); i++) { 498 ciKlass* receiver = call->receiver(i); 499 if (receiver == nullptr) continue; 500 int rcount = saturated_add(call->receiver_count(i), epsilon); 501 if (rcount == 0) rcount = 1; // Should be valid value 502 receivers_count_total = saturated_add(receivers_count_total, rcount); 503 // Add the receiver to result data. 504 result.add_receiver(receiver, rcount); 505 // If we extend profiling to record methods, 506 // we will set result._method also. 507 } 508 // Determine call site's morphism. 509 // The call site count is 0 with known morphism (only 1 or 2 receivers) 510 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 511 // The call site count is > 0 in the case of a polymorphic virtual call. 512 if (morphism > 0 && morphism == result._limit) { 513 // The morphism <= MorphismLimit. 514 if ((morphism < ciCallProfile::MorphismLimit) || 515 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 516 #ifdef ASSERT 517 if (count > 0) { 518 this->print_short_name(tty); 519 tty->print_cr(" @ bci:%d", bci); 520 this->print_codes(); 521 assert(false, "this call site should not be polymorphic"); 522 } 523 #endif 524 result._morphism = morphism; 525 } 526 } 527 // Make the count consistent if this is a call profile. If count is 528 // zero or less, presume that this is a typecheck profile and 529 // do nothing. Otherwise, increase count to be the sum of all 530 // receiver's counts. 531 if (count >= 0) { 532 count = saturated_add(count, receivers_count_total); 533 } 534 } 535 result._count = count; 536 } 537 } 538 return result; 539 } 540 541 // ------------------------------------------------------------------ 542 // Add new receiver and sort data by receiver's profile count. 543 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 544 // Add new receiver and sort data by receiver's counts when we have space 545 // for it otherwise replace the less called receiver (less called receiver 546 // is placed to the last array element which is not used). 547 // First array's element contains most called receiver. 548 int i = _limit; 549 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 550 _receiver[i] = _receiver[i-1]; 551 _receiver_count[i] = _receiver_count[i-1]; 552 } 553 _receiver[i] = receiver; 554 _receiver_count[i] = receiver_count; 555 if (_limit < MorphismLimit) _limit++; 556 } 557 558 559 void ciMethod::assert_virtual_call_type_ok(int bci) { 560 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 561 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 562 } 563 564 void ciMethod::assert_call_type_ok(int bci) { 565 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 566 java_code_at_bci(bci) == Bytecodes::_invokespecial || 567 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 568 } 569 570 /** 571 * Check whether profiling provides a type for the argument i to the 572 * call at bci bci 573 * 574 * @param [in]bci bci of the call 575 * @param [in]i argument number 576 * @param [out]type profiled type of argument, null if none 577 * @param [out]ptr_kind whether always null, never null or maybe null 578 * @return true if profiling exists 579 * 580 */ 581 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 582 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) { 583 ciProfileData* data = method_data()->bci_to_data(bci); 584 if (data != nullptr) { 585 if (data->is_VirtualCallTypeData()) { 586 assert_virtual_call_type_ok(bci); 587 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 588 if (i >= call->number_of_arguments()) { 589 return false; 590 } 591 type = call->valid_argument_type(i); 592 ptr_kind = call->argument_ptr_kind(i); 593 return true; 594 } else if (data->is_CallTypeData()) { 595 assert_call_type_ok(bci); 596 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 597 if (i >= call->number_of_arguments()) { 598 return false; 599 } 600 type = call->valid_argument_type(i); 601 ptr_kind = call->argument_ptr_kind(i); 602 return true; 603 } 604 } 605 } 606 return false; 607 } 608 609 /** 610 * Check whether profiling provides a type for the return value from 611 * the call at bci bci 612 * 613 * @param [in]bci bci of the call 614 * @param [out]type profiled type of argument, null if none 615 * @param [out]ptr_kind whether always null, never null or maybe null 616 * @return true if profiling exists 617 * 618 */ 619 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 620 if (MethodData::profile_return() && method_data() != nullptr && method_data()->is_mature()) { 621 ciProfileData* data = method_data()->bci_to_data(bci); 622 if (data != nullptr) { 623 if (data->is_VirtualCallTypeData()) { 624 assert_virtual_call_type_ok(bci); 625 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 626 if (call->has_return()) { 627 type = call->valid_return_type(); 628 ptr_kind = call->return_ptr_kind(); 629 return true; 630 } 631 } else if (data->is_CallTypeData()) { 632 assert_call_type_ok(bci); 633 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 634 if (call->has_return()) { 635 type = call->valid_return_type(); 636 ptr_kind = call->return_ptr_kind(); 637 } 638 return true; 639 } 640 } 641 } 642 return false; 643 } 644 645 /** 646 * Check whether profiling provides a type for the parameter i 647 * 648 * @param [in]i parameter number 649 * @param [out]type profiled type of parameter, null if none 650 * @param [out]ptr_kind whether always null, never null or maybe null 651 * @return true if profiling exists 652 * 653 */ 654 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 655 if (MethodData::profile_parameters() && method_data() != nullptr && method_data()->is_mature()) { 656 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 657 if (parameters != nullptr && i < parameters->number_of_parameters()) { 658 type = parameters->valid_parameter_type(i); 659 ptr_kind = parameters->parameter_ptr_kind(i); 660 return true; 661 } 662 } 663 return false; 664 } 665 666 bool ciMethod::array_access_profiled_type(int bci, ciKlass*& array_type, ciKlass*& element_type, ProfilePtrKind& element_ptr, bool &flat_array, bool &null_free_array) { 667 if (method_data() != nullptr && method_data()->is_mature()) { 668 ciProfileData* data = method_data()->bci_to_data(bci); 669 if (data != nullptr) { 670 if (data->is_ArrayLoadData()) { 671 ciArrayLoadData* array_access = (ciArrayLoadData*) data->as_ArrayLoadData(); 672 array_type = array_access->array()->valid_type(); 673 element_type = array_access->element()->valid_type(); 674 element_ptr = array_access->element()->ptr_kind(); 675 flat_array = array_access->flat_array(); 676 null_free_array = array_access->null_free_array(); 677 return true; 678 } else if (data->is_ArrayStoreData()) { 679 ciArrayStoreData* array_access = (ciArrayStoreData*) data->as_ArrayStoreData(); 680 array_type = array_access->array()->valid_type(); 681 flat_array = array_access->flat_array(); 682 null_free_array = array_access->null_free_array(); 683 ciCallProfile call_profile = call_profile_at_bci(bci); 684 if (call_profile.morphism() == 1) { 685 element_type = call_profile.receiver(0); 686 } else { 687 element_type = nullptr; 688 } 689 if (!array_access->null_seen()) { 690 element_ptr = ProfileNeverNull; 691 } else if (call_profile.count() == 0) { 692 element_ptr = ProfileAlwaysNull; 693 } else { 694 element_ptr = ProfileMaybeNull; 695 } 696 return true; 697 } 698 } 699 } 700 return false; 701 } 702 703 bool ciMethod::acmp_profiled_type(int bci, ciKlass*& left_type, ciKlass*& right_type, ProfilePtrKind& left_ptr, ProfilePtrKind& right_ptr, bool &left_inline_type, bool &right_inline_type) { 704 if (method_data() != nullptr && method_data()->is_mature()) { 705 ciProfileData* data = method_data()->bci_to_data(bci); 706 if (data != nullptr && data->is_ACmpData()) { 707 ciACmpData* acmp = (ciACmpData*)data->as_ACmpData(); 708 left_type = acmp->left()->valid_type(); 709 right_type = acmp->right()->valid_type(); 710 left_ptr = acmp->left()->ptr_kind(); 711 right_ptr = acmp->right()->ptr_kind(); 712 left_inline_type = acmp->left_inline_type(); 713 right_inline_type = acmp->right_inline_type(); 714 return true; 715 } 716 } 717 return false; 718 } 719 720 721 // ------------------------------------------------------------------ 722 // ciMethod::find_monomorphic_target 723 // 724 // Given a certain calling environment, find the monomorphic target 725 // for the call. Return null if the call is not monomorphic in 726 // its calling environment, or if there are only abstract methods. 727 // The returned method is never abstract. 728 // Note: If caller uses a non-null result, it must inform dependencies 729 // via assert_unique_concrete_method or assert_leaf_type. 730 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 731 ciInstanceKlass* callee_holder, 732 ciInstanceKlass* actual_recv, 733 bool check_access) { 734 check_is_loaded(); 735 736 if (actual_recv->is_interface()) { 737 // %%% We cannot trust interface types, yet. See bug 6312651. 738 return nullptr; 739 } 740 741 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */); 742 if (root_m == nullptr) { 743 // Something went wrong looking up the actual receiver method. 744 return nullptr; 745 } 746 747 // Make certain quick checks even if UseCHA is false. 748 749 // Is it private or final? 750 if (root_m->can_be_statically_bound()) { 751 assert(!root_m->is_abstract(), "sanity"); 752 return root_m; 753 } 754 755 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 756 // Easy case. There is no other place to put a method, so don't bother 757 // to go through the VM_ENTRY_MARK and all the rest. 758 if (root_m->is_abstract()) { 759 return nullptr; 760 } 761 return root_m; 762 } 763 764 // Array methods (clone, hashCode, etc.) are always statically bound. 765 // If we were to see an array type here, we'd return root_m. 766 // However, this method processes only ciInstanceKlasses. (See 4962591.) 767 // The inline_native_clone intrinsic narrows Object to T[] properly, 768 // so there is no need to do the same job here. 769 770 if (!UseCHA) return nullptr; 771 772 VM_ENTRY_MARK; 773 774 methodHandle target; 775 { 776 MutexLocker locker(Compile_lock); 777 InstanceKlass* context = actual_recv->get_instanceKlass(); 778 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, 779 root_m->get_Method(), 780 callee_holder->get_Klass(), 781 this->get_Method())); 782 assert(target() == nullptr || !target()->is_abstract(), "not allowed"); 783 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 784 } 785 786 #ifndef PRODUCT 787 LogTarget(Debug, dependencies) lt; 788 if (lt.is_enabled() && target() != nullptr && target() != root_m->get_Method()) { 789 LogStream ls(<); 790 ls.print("found a non-root unique target method"); 791 ls.print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 792 ls.print(" method = "); 793 target->print_short_name(&ls); 794 ls.cr(); 795 } 796 #endif //PRODUCT 797 798 if (target() == nullptr) { 799 return nullptr; 800 } 801 802 // Redefinition support. 803 if (this->is_old() || root_m->is_old() || target->is_old()) { 804 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected"); 805 return nullptr; 806 } 807 808 if (target() == root_m->get_Method()) { 809 return root_m; 810 } 811 if (!root_m->is_public() && 812 !root_m->is_protected()) { 813 // If we are going to reason about inheritance, it's easiest 814 // if the method in question is public, protected, or private. 815 // If the answer is not root_m, it is conservatively correct 816 // to return null, even if the CHA encountered irrelevant 817 // methods in other packages. 818 // %%% TO DO: Work out logic for package-private methods 819 // with the same name but different vtable indexes. 820 return nullptr; 821 } 822 return CURRENT_THREAD_ENV->get_method(target()); 823 } 824 825 // ------------------------------------------------------------------ 826 // ciMethod::can_be_statically_bound 827 // 828 // Tries to determine whether a method can be statically bound in some context. 829 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const { 830 return (holder() == context) && can_be_statically_bound(); 831 } 832 833 // ------------------------------------------------------------------ 834 // ciMethod::can_omit_stack_trace 835 // 836 // Tries to determine whether a method can omit stack trace in throw in compiled code. 837 bool ciMethod::can_omit_stack_trace() const { 838 if (!StackTraceInThrowable) { 839 return true; // stack trace is switched off. 840 } 841 if (!OmitStackTraceInFastThrow) { 842 return false; // Have to provide stack trace. 843 } 844 return _can_omit_stack_trace; 845 } 846 847 // ------------------------------------------------------------------ 848 // ciMethod::resolve_invoke 849 // 850 // Given a known receiver klass, find the target for the call. 851 // Return null if the call has no target or the target is abstract. 852 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) { 853 check_is_loaded(); 854 VM_ENTRY_MARK; 855 856 Klass* caller_klass = caller->get_Klass(); 857 Klass* recv = exact_receiver->get_Klass(); 858 Klass* resolved = holder()->get_Klass(); 859 Symbol* h_name = name()->get_symbol(); 860 Symbol* h_signature = signature()->get_symbol(); 861 862 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 863 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip, 864 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip); 865 Method* m = nullptr; 866 // Only do exact lookup if receiver klass has been linked. Otherwise, 867 // the vtable has not been setup, and the LinkResolver will fail. 868 if (recv->is_array_klass() 869 || 870 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 871 if (holder()->is_interface()) { 872 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 873 } else { 874 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info); 875 } 876 } 877 878 if (m == nullptr) { 879 // Return null only if there was a problem with lookup (uninitialized class, etc.) 880 return nullptr; 881 } 882 883 ciMethod* result = this; 884 if (m != get_Method()) { 885 // Redefinition support. 886 if (this->is_old() || m->is_old()) { 887 guarantee(CURRENT_THREAD_ENV->jvmti_state_changed(), "old method not detected"); 888 return nullptr; 889 } 890 891 result = CURRENT_THREAD_ENV->get_method(m); 892 } 893 894 if (result->is_abstract() && !allow_abstract) { 895 // Don't return abstract methods because they aren't optimizable or interesting. 896 return nullptr; 897 } 898 return result; 899 } 900 901 // ------------------------------------------------------------------ 902 // ciMethod::resolve_vtable_index 903 // 904 // Given a known receiver klass, find the vtable index for the call. 905 // Return Method::invalid_vtable_index if the vtable_index is unknown. 906 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 907 check_is_loaded(); 908 909 int vtable_index = Method::invalid_vtable_index; 910 // Only do lookup if receiver klass has been linked. Otherwise, 911 // the vtable has not been setup, and the LinkResolver will fail. 912 if (!receiver->is_interface() 913 && (!receiver->is_instance_klass() || 914 receiver->as_instance_klass()->is_linked())) { 915 VM_ENTRY_MARK; 916 917 Klass* caller_klass = caller->get_Klass(); 918 Klass* recv = receiver->get_Klass(); 919 Symbol* h_name = name()->get_symbol(); 920 Symbol* h_signature = signature()->get_symbol(); 921 922 LinkInfo link_info(recv, h_name, h_signature, caller_klass); 923 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info); 924 if (vtable_index == Method::nonvirtual_vtable_index) { 925 // A statically bound method. Return "no such index". 926 vtable_index = Method::invalid_vtable_index; 927 } 928 } 929 930 return vtable_index; 931 } 932 933 // ------------------------------------------------------------------ 934 // ciMethod::get_field_at_bci 935 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 936 ciBytecodeStream iter(this); 937 iter.reset_to_bci(bci); 938 iter.next(); 939 return iter.get_field(will_link); 940 } 941 942 // ------------------------------------------------------------------ 943 // ciMethod::get_method_at_bci 944 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 945 ciBytecodeStream iter(this); 946 iter.reset_to_bci(bci); 947 iter.next(); 948 return iter.get_method(will_link, declared_signature); 949 } 950 951 // ------------------------------------------------------------------ 952 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) { 953 ciBytecodeStream iter(this); 954 iter.reset_to_bci(bci); 955 iter.next(); 956 return iter.get_declared_method_holder(); 957 } 958 959 // ------------------------------------------------------------------ 960 // Adjust a CounterData count to be commensurate with 961 // interpreter_invocation_count. If the MDO exists for 962 // only 25% of the time the method exists, then the 963 // counts in the MDO should be scaled by 4X, so that 964 // they can be usefully and stably compared against the 965 // invocation counts in methods. 966 int ciMethod::scale_count(int count, float prof_factor) { 967 if (count > 0 && method_data() != nullptr) { 968 int counter_life = method_data()->invocation_count(); 969 int method_life = interpreter_invocation_count(); 970 if (method_life < counter_life) { // may happen because of the snapshot timing 971 method_life = counter_life; 972 } 973 if (counter_life > 0) { 974 double count_d = (double)count * prof_factor * method_life / counter_life + 0.5; 975 if (count_d >= static_cast<double>(INT_MAX)) { 976 // Clamp in case of overflowing int range. 977 count = INT_MAX; 978 } else { 979 count = int(count_d); 980 count = (count > 0) ? count : 1; 981 } 982 } else { 983 count = 1; 984 } 985 } 986 return count; 987 } 988 989 990 // ------------------------------------------------------------------ 991 // ciMethod::is_special_get_caller_class_method 992 // 993 bool ciMethod::is_ignored_by_security_stack_walk() const { 994 check_is_loaded(); 995 VM_ENTRY_MARK; 996 return get_Method()->is_ignored_by_security_stack_walk(); 997 } 998 999 // ------------------------------------------------------------------ 1000 // ciMethod::needs_clinit_barrier 1001 // 1002 bool ciMethod::needs_clinit_barrier() const { 1003 check_is_loaded(); 1004 return is_static() && !holder()->is_initialized(); 1005 } 1006 1007 // ------------------------------------------------------------------ 1008 // invokedynamic support 1009 1010 // ------------------------------------------------------------------ 1011 // ciMethod::is_method_handle_intrinsic 1012 // 1013 // Return true if the method is an instance of the JVM-generated 1014 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 1015 bool ciMethod::is_method_handle_intrinsic() const { 1016 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 1017 return (MethodHandles::is_signature_polymorphic(iid) && 1018 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 1019 } 1020 1021 // ------------------------------------------------------------------ 1022 // ciMethod::is_compiled_lambda_form 1023 // 1024 // Return true if the method is a generated MethodHandle adapter. 1025 // These are built by Java code. 1026 bool ciMethod::is_compiled_lambda_form() const { 1027 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 1028 return iid == vmIntrinsics::_compiledLambdaForm; 1029 } 1030 1031 // ------------------------------------------------------------------ 1032 // ciMethod::is_object_constructor 1033 // 1034 bool ciMethod::is_object_constructor() const { 1035 return (name() == ciSymbols::object_initializer_name() 1036 && signature()->return_type()->is_void()); 1037 // Note: We can't test is_static, because that would 1038 // require the method to be loaded. Sometimes it isn't. 1039 } 1040 1041 // ------------------------------------------------------------------ 1042 // ciMethod::is_scoped 1043 // 1044 // Return true for methods annotated with @Scoped 1045 bool ciMethod::is_scoped() const { 1046 return get_Method()->is_scoped(); 1047 } 1048 1049 // ------------------------------------------------------------------ 1050 // ciMethod::has_member_arg 1051 // 1052 // Return true if the method is a linker intrinsic like _linkToVirtual. 1053 // These are built by the JVM. 1054 bool ciMethod::has_member_arg() const { 1055 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 1056 return (MethodHandles::is_signature_polymorphic(iid) && 1057 MethodHandles::has_member_arg(iid)); 1058 } 1059 1060 // ------------------------------------------------------------------ 1061 // ciMethod::ensure_method_data 1062 // 1063 // Generate new MethodData* objects at compile time. 1064 // Return true if allocation was successful or no MDO is required. 1065 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 1066 EXCEPTION_CONTEXT; 1067 if (is_native() || is_abstract() || h_m()->is_accessor()) { 1068 return true; 1069 } 1070 if (h_m()->method_data() == nullptr) { 1071 Method::build_profiling_method_data(h_m, THREAD); 1072 if (HAS_PENDING_EXCEPTION) { 1073 CLEAR_PENDING_EXCEPTION; 1074 } 1075 } 1076 if (h_m()->method_data() != nullptr) { 1077 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1078 return _method_data->load_data(); 1079 } else { 1080 _method_data = CURRENT_ENV->get_empty_methodData(); 1081 return false; 1082 } 1083 } 1084 1085 // public, retroactive version 1086 bool ciMethod::ensure_method_data() { 1087 bool result = true; 1088 if (_method_data == nullptr || _method_data->is_empty()) { 1089 GUARDED_VM_ENTRY({ 1090 methodHandle mh(Thread::current(), get_Method()); 1091 result = ensure_method_data(mh); 1092 }); 1093 } 1094 return result; 1095 } 1096 1097 1098 // ------------------------------------------------------------------ 1099 // ciMethod::method_data 1100 // 1101 ciMethodData* ciMethod::method_data() { 1102 if (_method_data != nullptr) { 1103 return _method_data; 1104 } 1105 VM_ENTRY_MARK; 1106 ciEnv* env = CURRENT_ENV; 1107 Thread* my_thread = JavaThread::current(); 1108 methodHandle h_m(my_thread, get_Method()); 1109 1110 if (h_m()->method_data() != nullptr) { 1111 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1112 _method_data->load_data(); 1113 } else { 1114 _method_data = CURRENT_ENV->get_empty_methodData(); 1115 } 1116 return _method_data; 1117 1118 } 1119 1120 // ------------------------------------------------------------------ 1121 // ciMethod::method_data_or_null 1122 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1123 // null otherwise. 1124 ciMethodData* ciMethod::method_data_or_null() { 1125 ciMethodData *md = method_data(); 1126 if (md->is_empty()) { 1127 return nullptr; 1128 } 1129 return md; 1130 } 1131 1132 // ------------------------------------------------------------------ 1133 // ciMethod::ensure_method_counters 1134 // 1135 MethodCounters* ciMethod::ensure_method_counters() { 1136 check_is_loaded(); 1137 VM_ENTRY_MARK; 1138 methodHandle mh(THREAD, get_Method()); 1139 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1140 return method_counters; 1141 } 1142 1143 // ------------------------------------------------------------------ 1144 // ciMethod::has_option 1145 // 1146 bool ciMethod::has_option(CompileCommandEnum option) { 1147 check_is_loaded(); 1148 VM_ENTRY_MARK; 1149 methodHandle mh(THREAD, get_Method()); 1150 return CompilerOracle::has_option(mh, option); 1151 } 1152 1153 // ------------------------------------------------------------------ 1154 // ciMethod::has_option_value 1155 // 1156 bool ciMethod::has_option_value(CompileCommandEnum option, double& value) { 1157 check_is_loaded(); 1158 VM_ENTRY_MARK; 1159 methodHandle mh(THREAD, get_Method()); 1160 return CompilerOracle::has_option_value(mh, option, value); 1161 } 1162 // ------------------------------------------------------------------ 1163 // ciMethod::can_be_compiled 1164 // 1165 // Have previous compilations of this method succeeded? 1166 bool ciMethod::can_be_compiled() { 1167 check_is_loaded(); 1168 ciEnv* env = CURRENT_ENV; 1169 if (is_c1_compile(env->comp_level())) { 1170 return _is_c1_compilable; 1171 } 1172 return _is_c2_compilable; 1173 } 1174 1175 // ------------------------------------------------------------------ 1176 // ciMethod::has_compiled_code 1177 bool ciMethod::has_compiled_code() { 1178 return inline_instructions_size() > 0; 1179 } 1180 1181 int ciMethod::highest_osr_comp_level() { 1182 check_is_loaded(); 1183 VM_ENTRY_MARK; 1184 return get_Method()->highest_osr_comp_level(); 1185 } 1186 1187 // ------------------------------------------------------------------ 1188 // ciMethod::code_size_for_inlining 1189 // 1190 // Code size for inlining decisions. This method returns a code 1191 // size of 1 for methods which has the ForceInline annotation. 1192 int ciMethod::code_size_for_inlining() { 1193 check_is_loaded(); 1194 if (get_Method()->force_inline()) { 1195 return 1; 1196 } 1197 return code_size(); 1198 } 1199 1200 // ------------------------------------------------------------------ 1201 // ciMethod::inline_instructions_size 1202 // 1203 // This is a rough metric for "fat" methods, compared before inlining 1204 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1205 // junk like exception handler, stubs, and constant table, which are 1206 // not highly relevant to an inlined method. So we use the more 1207 // specific accessor nmethod::insts_size. 1208 // Also some instructions inside the code are excluded from inline 1209 // heuristic (e.g. post call nop instructions; see InlineSkippedInstructionsCounter) 1210 int ciMethod::inline_instructions_size() { 1211 if (_inline_instructions_size == -1) { 1212 if (TrainingData::have_data()) { 1213 GUARDED_VM_ENTRY( 1214 CompLevel level = static_cast<CompLevel>(CURRENT_ENV->comp_level()); 1215 methodHandle top_level_mh(Thread::current(), CURRENT_ENV->task()->method()); 1216 MethodTrainingData* mtd = MethodTrainingData::find(top_level_mh); 1217 if (mtd != nullptr) { 1218 CompileTrainingData* ctd = mtd->last_toplevel_compile(level); 1219 if (ctd != nullptr) { 1220 methodHandle mh(Thread::current(), get_Method()); 1221 MethodTrainingData* this_mtd = MethodTrainingData::find(mh); 1222 if (this_mtd != nullptr) { 1223 auto r = ctd->ci_records().ciMethod__inline_instructions_size.find(this_mtd); 1224 if (r.is_valid()) { 1225 _inline_instructions_size = r.result(); 1226 } 1227 } 1228 } 1229 } 1230 ); 1231 } 1232 } 1233 if (_inline_instructions_size == -1) { 1234 GUARDED_VM_ENTRY( 1235 nmethod* code = get_Method()->code(); 1236 if (code != nullptr && (code->comp_level() == CompLevel_full_optimization)) { 1237 int isize = code->insts_end() - code->verified_entry_point() - code->skipped_instructions_size(); 1238 _inline_instructions_size = isize > 0 ? isize : 0; 1239 } else { 1240 _inline_instructions_size = 0; 1241 } 1242 if (TrainingData::need_data()) { 1243 CompileTrainingData* ctd = CURRENT_ENV->task()->training_data(); 1244 if (ctd != nullptr) { 1245 methodHandle mh(Thread::current(), get_Method()); 1246 MethodTrainingData* this_mtd = MethodTrainingData::make(mh); 1247 ctd->ci_records().ciMethod__inline_instructions_size.append_if_missing(_inline_instructions_size, this_mtd); 1248 } 1249 } 1250 ); 1251 } 1252 return _inline_instructions_size; 1253 } 1254 1255 // ------------------------------------------------------------------ 1256 // ciMethod::log_nmethod_identity 1257 void ciMethod::log_nmethod_identity(xmlStream* log) { 1258 GUARDED_VM_ENTRY( 1259 nmethod* code = get_Method()->code(); 1260 if (code != nullptr) { 1261 code->log_identity(log); 1262 } 1263 ) 1264 } 1265 1266 // ------------------------------------------------------------------ 1267 // ciMethod::is_not_reached 1268 bool ciMethod::is_not_reached(int bci) { 1269 check_is_loaded(); 1270 VM_ENTRY_MARK; 1271 return Interpreter::is_not_reached( 1272 methodHandle(THREAD, get_Method()), bci); 1273 } 1274 1275 // ------------------------------------------------------------------ 1276 // ciMethod::was_never_executed 1277 bool ciMethod::was_executed_more_than(int times) { 1278 VM_ENTRY_MARK; 1279 return get_Method()->was_executed_more_than(times); 1280 } 1281 1282 // ------------------------------------------------------------------ 1283 // ciMethod::has_unloaded_classes_in_signature 1284 bool ciMethod::has_unloaded_classes_in_signature() { 1285 // ciSignature is resolved against some accessing class and 1286 // signature classes aren't required to be local. As a benefit, 1287 // it makes signature classes visible through loader constraints. 1288 // So, encountering an unloaded class signals it is absent both in 1289 // the callee (local) and caller contexts. 1290 return signature()->has_unloaded_classes(); 1291 } 1292 1293 // ------------------------------------------------------------------ 1294 // ciMethod::is_klass_loaded 1295 bool ciMethod::is_klass_loaded(int refinfo_index, Bytecodes::Code bc, bool must_be_resolved) const { 1296 VM_ENTRY_MARK; 1297 return get_Method()->is_klass_loaded(refinfo_index, bc, must_be_resolved); 1298 } 1299 1300 // ------------------------------------------------------------------ 1301 // ciMethod::check_call 1302 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1303 // This method is used only in C2 from InlineTree::ok_to_inline, 1304 // and is only used under -Xcomp. 1305 // It appears to fail when applied to an invokeinterface call site. 1306 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1307 VM_ENTRY_MARK; 1308 { 1309 ExceptionMark em(THREAD); 1310 HandleMark hm(THREAD); 1311 constantPoolHandle pool (THREAD, get_Method()->constants()); 1312 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1313 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1314 if (HAS_PENDING_EXCEPTION) { 1315 CLEAR_PENDING_EXCEPTION; 1316 return false; 1317 } else { 1318 return (spec_method->is_static() == is_static); 1319 } 1320 } 1321 return false; 1322 } 1323 // ------------------------------------------------------------------ 1324 // ciMethod::print_codes 1325 // 1326 // Print the bytecodes for this method. 1327 void ciMethod::print_codes_on(outputStream* st) { 1328 check_is_loaded(); 1329 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1330 } 1331 1332 1333 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1334 check_is_loaded(); \ 1335 VM_ENTRY_MARK; \ 1336 return get_Method()->flag_accessor(); \ 1337 } 1338 1339 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1340 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1341 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1342 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1343 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1344 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); } 1345 1346 bool ciMethod::is_boxing_method() const { 1347 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) { 1348 switch (intrinsic_id()) { 1349 case vmIntrinsics::_Boolean_valueOf: 1350 case vmIntrinsics::_Byte_valueOf: 1351 case vmIntrinsics::_Character_valueOf: 1352 case vmIntrinsics::_Short_valueOf: 1353 case vmIntrinsics::_Integer_valueOf: 1354 case vmIntrinsics::_Long_valueOf: 1355 case vmIntrinsics::_Float_valueOf: 1356 case vmIntrinsics::_Double_valueOf: 1357 return true; 1358 default: 1359 return false; 1360 } 1361 } 1362 return false; 1363 } 1364 1365 bool ciMethod::is_unboxing_method() const { 1366 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) { 1367 switch (intrinsic_id()) { 1368 case vmIntrinsics::_booleanValue: 1369 case vmIntrinsics::_byteValue: 1370 case vmIntrinsics::_charValue: 1371 case vmIntrinsics::_shortValue: 1372 case vmIntrinsics::_intValue: 1373 case vmIntrinsics::_longValue: 1374 case vmIntrinsics::_floatValue: 1375 case vmIntrinsics::_doubleValue: 1376 return true; 1377 default: 1378 return false; 1379 } 1380 } 1381 return false; 1382 } 1383 1384 bool ciMethod::is_vector_method() const { 1385 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) && 1386 (intrinsic_id() != vmIntrinsics::_none); 1387 } 1388 1389 BCEscapeAnalyzer *ciMethod::get_bcea() { 1390 #ifdef COMPILER2 1391 if (_bcea == nullptr) { 1392 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, nullptr); 1393 } 1394 return _bcea; 1395 #else // COMPILER2 1396 ShouldNotReachHere(); 1397 return nullptr; 1398 #endif // COMPILER2 1399 } 1400 1401 ciMethodBlocks *ciMethod::get_method_blocks() { 1402 if (_method_blocks == nullptr) { 1403 Arena *arena = CURRENT_ENV->arena(); 1404 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1405 } 1406 return _method_blocks; 1407 } 1408 1409 #undef FETCH_FLAG_FROM_VM 1410 1411 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) { 1412 st->print("%s %s %s", 1413 CURRENT_ENV->replay_name(method->method_holder()), 1414 method->name()->as_quoted_ascii(), 1415 method->signature()->as_quoted_ascii()); 1416 } 1417 1418 void ciMethod::dump_name_as_ascii(outputStream* st) { 1419 Method* method = get_Method(); 1420 dump_name_as_ascii(st, method); 1421 } 1422 1423 void ciMethod::dump_replay_data(outputStream* st) { 1424 ResourceMark rm; 1425 Method* method = get_Method(); 1426 if (MethodHandles::is_signature_polymorphic_method(method)) { 1427 // ignore for now 1428 return; 1429 } 1430 MethodCounters* mcs = method->method_counters(); 1431 st->print("ciMethod "); 1432 dump_name_as_ascii(st); 1433 st->print_cr(" %d %d %d %d %d", 1434 mcs == nullptr ? 0 : mcs->invocation_counter()->raw_counter(), 1435 mcs == nullptr ? 0 : mcs->backedge_counter()->raw_counter(), 1436 interpreter_invocation_count(), 1437 interpreter_throwout_count(), 1438 _inline_instructions_size); 1439 } 1440 1441 // ------------------------------------------------------------------ 1442 // ciMethod::print_codes 1443 // 1444 // Print a range of the bytecodes for this method. 1445 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1446 check_is_loaded(); 1447 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1448 } 1449 1450 // ------------------------------------------------------------------ 1451 // ciMethod::print_name 1452 // 1453 // Print the name of this method, including signature and some flags. 1454 void ciMethod::print_name(outputStream* st) { 1455 check_is_loaded(); 1456 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1457 } 1458 1459 // ------------------------------------------------------------------ 1460 // ciMethod::print_short_name 1461 // 1462 // Print the name of this method, without signature. 1463 void ciMethod::print_short_name(outputStream* st) { 1464 if (is_loaded()) { 1465 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1466 } else { 1467 // Fall back if method is not loaded. 1468 holder()->print_name_on(st); 1469 st->print("::"); 1470 name()->print_symbol_on(st); 1471 if (WizardMode) 1472 signature()->as_symbol()->print_symbol_on(st); 1473 } 1474 } 1475 1476 // ------------------------------------------------------------------ 1477 // ciMethod::print_impl 1478 // 1479 // Implementation of the print method. 1480 void ciMethod::print_impl(outputStream* st) { 1481 ciMetadata::print_impl(st); 1482 st->print(" name="); 1483 name()->print_symbol_on(st); 1484 st->print(" holder="); 1485 holder()->print_name_on(st); 1486 st->print(" signature="); 1487 signature()->as_symbol()->print_symbol_on(st); 1488 if (is_loaded()) { 1489 st->print(" loaded=true"); 1490 st->print(" arg_size=%d", arg_size()); 1491 st->print(" flags="); 1492 flags().print_member_flags(st); 1493 } else { 1494 st->print(" loaded=false"); 1495 } 1496 } 1497 1498 // ------------------------------------------------------------------ 1499 1500 static BasicType erase_to_word_type(BasicType bt) { 1501 if (is_subword_type(bt)) return T_INT; 1502 if (is_reference_type(bt)) return T_OBJECT; 1503 return bt; 1504 } 1505 1506 static bool basic_types_match(ciType* t1, ciType* t2) { 1507 if (t1 == t2) return true; 1508 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1509 } 1510 1511 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1512 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1513 !resolved_method->is_method_handle_intrinsic(); 1514 1515 if (!invoke_through_mh_intrinsic) { 1516 // Method name & descriptor should stay the same. 1517 // Signatures may reference unloaded types and thus they may be not strictly equal. 1518 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1519 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1520 1521 return (declared_method->name()->equals(resolved_method->name())) && 1522 (declared_signature->equals(resolved_signature)); 1523 } 1524 1525 ciMethod* linker = declared_method; 1526 ciMethod* target = resolved_method; 1527 // Linkers have appendix argument which is not passed to callee. 1528 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1529 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1530 return false; // argument slot count mismatch 1531 } 1532 1533 ciSignature* linker_sig = linker->signature(); 1534 ciSignature* target_sig = target->signature(); 1535 1536 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1537 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1538 return false; // argument count mismatch 1539 } 1540 1541 int sbase = 0, rbase = 0; 1542 switch (linker->intrinsic_id()) { 1543 case vmIntrinsics::_linkToVirtual: 1544 case vmIntrinsics::_linkToInterface: 1545 case vmIntrinsics::_linkToSpecial: { 1546 if (target->is_static()) { 1547 return false; 1548 } 1549 if (linker_sig->type_at(0)->is_primitive_type()) { 1550 return false; // receiver should be an oop 1551 } 1552 sbase = 1; // skip receiver 1553 break; 1554 } 1555 case vmIntrinsics::_linkToStatic: { 1556 if (!target->is_static()) { 1557 return false; 1558 } 1559 break; 1560 } 1561 case vmIntrinsics::_invokeBasic: { 1562 if (target->is_static()) { 1563 if (target_sig->type_at(0)->is_primitive_type()) { 1564 return false; // receiver should be an oop 1565 } 1566 rbase = 1; // skip receiver 1567 } 1568 break; 1569 } 1570 default: 1571 break; 1572 } 1573 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1574 int arg_count = target_sig->count() - rbase; 1575 for (int i = 0; i < arg_count; i++) { 1576 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1577 return false; 1578 } 1579 } 1580 // Only check the return type if the symbolic info has non-void return type. 1581 // I.e. the return value of the resolved method can be dropped. 1582 if (!linker->return_type()->is_void() && 1583 !basic_types_match(linker->return_type(), target->return_type())) { 1584 return false; 1585 } 1586 return true; // no mismatch found 1587 } 1588 1589 // ------------------------------------------------------------------ 1590 1591 bool ciMethod::is_scalarized_arg(int idx) const { 1592 VM_ENTRY_MARK; 1593 return get_Method()->is_scalarized_arg(idx); 1594 } 1595 1596 bool ciMethod::has_scalarized_args() const { 1597 VM_ENTRY_MARK; 1598 return get_Method()->has_scalarized_args(); 1599 } 1600 1601 const GrowableArray<SigEntry>* ciMethod::get_sig_cc() const { 1602 VM_ENTRY_MARK; 1603 if (get_Method()->adapter() == nullptr) { 1604 return nullptr; 1605 } 1606 return get_Method()->adapter()->get_sig_cc(); 1607 } 1608 1609 // ciMethod::is_old 1610 // 1611 // Return true for redefined methods 1612 bool ciMethod::is_old() const { 1613 ASSERT_IN_VM; 1614 return get_Method()->is_old(); 1615 }