1 /* 2 * Copyright (c) 1999, 2022, 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/ciSymbols.hpp" 36 #include "ci/ciUtilities.inline.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/compilerDefinitions.inline.hpp" 39 #include "compiler/methodLiveness.hpp" 40 #include "interpreter/interpreter.hpp" 41 #include "interpreter/linkResolver.hpp" 42 #include "interpreter/oopMapCache.hpp" 43 #include "memory/allocation.inline.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "oops/generateOopMap.hpp" 46 #include "oops/method.inline.hpp" 47 #include "oops/oop.inline.hpp" 48 #include "prims/methodHandles.hpp" 49 #include "runtime/deoptimization.hpp" 50 #include "runtime/handles.inline.hpp" 51 #include "utilities/bitMap.inline.hpp" 52 #include "utilities/xmlstream.hpp" 53 #ifdef COMPILER2 54 #include "ci/bcEscapeAnalyzer.hpp" 55 #include "ci/ciTypeFlow.hpp" 56 #include "oops/method.hpp" 57 #endif 58 59 // ciMethod 60 // 61 // This class represents a Method* in the HotSpot virtual 62 // machine. 63 64 65 // ------------------------------------------------------------------ 66 // ciMethod::ciMethod 67 // 68 // Loaded method. 69 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 70 ciMetadata(h_m()), 71 _holder(holder) 72 { 73 assert(h_m() != NULL, "no null method"); 74 assert(_holder->get_instanceKlass() == h_m->method_holder(), ""); 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 _handler_count = h_m->exception_table_length(); 84 _size_of_parameters = h_m->size_of_parameters(); 85 _uses_monitors = h_m->access_flags().has_monitor_bytecodes(); 86 _balanced_monitors = !_uses_monitors || h_m->access_flags().is_monitor_matching(); 87 _is_c1_compilable = !h_m->is_not_c1_compilable(); 88 _is_c2_compilable = !h_m->is_not_c2_compilable(); 89 _can_be_parsed = true; 90 _has_reserved_stack_access = h_m->has_reserved_stack_access(); 91 _is_overpass = h_m->is_overpass(); 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 // Check for blackhole intrinsic and then populate the intrinsic ID. 103 CompilerOracle::tag_blackhole_if_possible(h_m); 104 _intrinsic_id = h_m->intrinsic_id(); 105 106 ciEnv *env = CURRENT_ENV; 107 if (env->jvmti_can_hotswap_or_post_breakpoint()) { 108 // 6328518 check hotswap conditions under the right lock. 109 MutexLocker locker(Compile_lock); 110 if (Dependencies::check_evol_method(h_m()) != NULL) { 111 _is_c1_compilable = false; 112 _is_c2_compilable = false; 113 _can_be_parsed = false; 114 } 115 } else { 116 DEBUG_ONLY(CompilerThread::current()->check_possible_safepoint()); 117 } 118 119 if (h_m->method_holder()->is_linked()) { 120 _can_be_statically_bound = h_m->can_be_statically_bound(); 121 _can_omit_stack_trace = h_m->can_omit_stack_trace(); 122 } else { 123 // Have to use a conservative value in this case. 124 _can_be_statically_bound = false; 125 _can_omit_stack_trace = true; 126 } 127 128 // Adjust the definition of this condition to be more useful: 129 // %%% take these conditions into account in vtable generation 130 if (!_can_be_statically_bound && h_m->is_private()) 131 _can_be_statically_bound = true; 132 if (_can_be_statically_bound && h_m->is_abstract()) 133 _can_be_statically_bound = false; 134 135 // generating _signature may allow GC and therefore move m. 136 // These fields are always filled in. 137 _name = env->get_symbol(h_m->name()); 138 ciSymbol* sig_symbol = env->get_symbol(h_m->signature()); 139 constantPoolHandle cpool(Thread::current(), h_m->constants()); 140 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 141 _method_data = NULL; 142 // Take a snapshot of these values, so they will be commensurate with the MDO. 143 if (ProfileInterpreter || CompilerConfig::is_c1_profiling()) { 144 int invcnt = h_m->interpreter_invocation_count(); 145 // if the value overflowed report it as max int 146 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 147 _interpreter_throwout_count = h_m->interpreter_throwout_count(); 148 } else { 149 _interpreter_invocation_count = 0; 150 _interpreter_throwout_count = 0; 151 } 152 if (_interpreter_invocation_count == 0) 153 _interpreter_invocation_count = 1; 154 _instructions_size = -1; 155 if (ReplayCompiles) { 156 ciReplay::initialize(this); 157 } 158 } 159 160 161 // ------------------------------------------------------------------ 162 // ciMethod::ciMethod 163 // 164 // Unloaded method. 165 ciMethod::ciMethod(ciInstanceKlass* holder, 166 ciSymbol* name, 167 ciSymbol* signature, 168 ciInstanceKlass* accessor) : 169 ciMetadata((Metadata*)NULL), 170 _name( name), 171 _holder( holder), 172 _method_data( NULL), 173 _method_blocks( NULL), 174 _intrinsic_id( vmIntrinsics::_none), 175 _instructions_size(-1), 176 _can_be_statically_bound(false), 177 _can_omit_stack_trace(true), 178 _liveness( NULL) 179 #if defined(COMPILER2) 180 , 181 _flow( NULL), 182 _bcea( NULL) 183 #endif // COMPILER2 184 { 185 // Usually holder and accessor are the same type but in some cases 186 // the holder has the wrong class loader (e.g. invokedynamic call 187 // sites) so we pass the accessor. 188 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 189 } 190 191 192 // ------------------------------------------------------------------ 193 // ciMethod::load_code 194 // 195 // Load the bytecodes and exception handler table for this method. 196 void ciMethod::load_code() { 197 VM_ENTRY_MARK; 198 assert(is_loaded(), "only loaded methods have code"); 199 200 Method* me = get_Method(); 201 Arena* arena = CURRENT_THREAD_ENV->arena(); 202 203 // Load the bytecodes. 204 _code = (address)arena->Amalloc(code_size()); 205 memcpy(_code, me->code_base(), code_size()); 206 207 #if INCLUDE_JVMTI 208 // Revert any breakpoint bytecodes in ci's copy 209 if (me->number_of_breakpoints() > 0) { 210 BreakpointInfo* bp = me->method_holder()->breakpoints(); 211 for (; bp != NULL; bp = bp->next()) { 212 if (bp->match(me)) { 213 code_at_put(bp->bci(), bp->orig_bytecode()); 214 } 215 } 216 } 217 #endif 218 219 // And load the exception table. 220 ExceptionTable exc_table(me); 221 222 // Allocate one extra spot in our list of exceptions. This 223 // last entry will be used to represent the possibility that 224 // an exception escapes the method. See ciExceptionHandlerStream 225 // for details. 226 _exception_handlers = 227 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 228 * (_handler_count + 1)); 229 if (_handler_count > 0) { 230 for (int i=0; i<_handler_count; i++) { 231 _exception_handlers[i] = new (arena) ciExceptionHandler( 232 holder(), 233 /* start */ exc_table.start_pc(i), 234 /* limit */ exc_table.end_pc(i), 235 /* goto pc */ exc_table.handler_pc(i), 236 /* cp index */ exc_table.catch_type_index(i)); 237 } 238 } 239 240 // Put an entry at the end of our list to represent the possibility 241 // of exceptional exit. 242 _exception_handlers[_handler_count] = 243 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 244 245 if (CIPrintMethodCodes) { 246 print_codes(); 247 } 248 } 249 250 251 // ------------------------------------------------------------------ 252 // ciMethod::has_linenumber_table 253 // 254 // length unknown until decompression 255 bool ciMethod::has_linenumber_table() const { 256 check_is_loaded(); 257 VM_ENTRY_MARK; 258 return get_Method()->has_linenumber_table(); 259 } 260 261 262 // ------------------------------------------------------------------ 263 // ciMethod::line_number_from_bci 264 int ciMethod::line_number_from_bci(int bci) const { 265 check_is_loaded(); 266 VM_ENTRY_MARK; 267 return get_Method()->line_number_from_bci(bci); 268 } 269 270 271 // ------------------------------------------------------------------ 272 // ciMethod::vtable_index 273 // 274 // Get the position of this method's entry in the vtable, if any. 275 int ciMethod::vtable_index() { 276 check_is_loaded(); 277 assert(holder()->is_linked(), "must be linked"); 278 VM_ENTRY_MARK; 279 return get_Method()->vtable_index(); 280 } 281 282 // ------------------------------------------------------------------ 283 // ciMethod::uses_balanced_monitors 284 // 285 // Does this method use monitors in a strict stack-disciplined manner? 286 bool ciMethod::has_balanced_monitors() { 287 check_is_loaded(); 288 if (_balanced_monitors) return true; 289 290 // Analyze the method to see if monitors are used properly. 291 VM_ENTRY_MARK; 292 methodHandle method(THREAD, get_Method()); 293 assert(method->has_monitor_bytecodes(), "should have checked this"); 294 295 // Check to see if a previous compilation computed the 296 // monitor-matching analysis. 297 if (method->guaranteed_monitor_matching()) { 298 _balanced_monitors = true; 299 return true; 300 } 301 302 { 303 ExceptionMark em(THREAD); 304 ResourceMark rm(THREAD); 305 GeneratePairingInfo gpi(method); 306 if (!gpi.compute_map(THREAD)) { 307 fatal("Unrecoverable verification or out-of-memory error"); 308 } 309 if (!gpi.monitor_safe()) { 310 return false; 311 } 312 method->set_guaranteed_monitor_matching(); 313 _balanced_monitors = true; 314 } 315 return true; 316 } 317 318 319 // ------------------------------------------------------------------ 320 // ciMethod::get_flow_analysis 321 ciTypeFlow* ciMethod::get_flow_analysis() { 322 #if defined(COMPILER2) 323 if (_flow == NULL) { 324 ciEnv* env = CURRENT_ENV; 325 _flow = new (env->arena()) ciTypeFlow(env, this); 326 _flow->do_flow(); 327 } 328 return _flow; 329 #else // COMPILER2 330 ShouldNotReachHere(); 331 return NULL; 332 #endif // COMPILER2 333 } 334 335 336 // ------------------------------------------------------------------ 337 // ciMethod::get_osr_flow_analysis 338 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 339 #if defined(COMPILER2) 340 // OSR entry points are always place after a call bytecode of some sort 341 assert(osr_bci >= 0, "must supply valid OSR entry point"); 342 ciEnv* env = CURRENT_ENV; 343 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 344 flow->do_flow(); 345 return flow; 346 #else // COMPILER2 347 ShouldNotReachHere(); 348 return NULL; 349 #endif // COMPILER2 350 } 351 352 // ------------------------------------------------------------------ 353 // ciMethod::raw_liveness_at_bci 354 // 355 // Which local variables are live at a specific bci? 356 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 357 check_is_loaded(); 358 if (_liveness == NULL) { 359 // Create the liveness analyzer. 360 Arena* arena = CURRENT_ENV->arena(); 361 _liveness = new (arena) MethodLiveness(arena, this); 362 _liveness->compute_liveness(); 363 } 364 return _liveness->get_liveness_at(bci); 365 } 366 367 // ------------------------------------------------------------------ 368 // ciMethod::liveness_at_bci 369 // 370 // Which local variables are live at a specific bci? When debugging 371 // will return true for all locals in some cases to improve debug 372 // information. 373 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 374 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot) { 375 // Keep all locals live for the user's edification and amusement. 376 MethodLivenessResult result(_max_locals); 377 result.set_range(0, _max_locals); 378 result.set_is_valid(); 379 return result; 380 } 381 return raw_liveness_at_bci(bci); 382 } 383 384 // ciMethod::live_local_oops_at_bci 385 // 386 // find all the live oops in the locals array for a particular bci 387 // Compute what the interpreter believes by using the interpreter 388 // oopmap generator. This is used as a double check during osr to 389 // guard against conservative result from MethodLiveness making us 390 // think a dead oop is live. MethodLiveness is conservative in the 391 // sense that it may consider locals to be live which cannot be live, 392 // like in the case where a local could contain an oop or a primitive 393 // along different paths. In that case the local must be dead when 394 // those paths merge. Since the interpreter's viewpoint is used when 395 // gc'ing an interpreter frame we need to use its viewpoint during 396 // OSR when loading the locals. 397 398 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 399 VM_ENTRY_MARK; 400 InterpreterOopMap mask; 401 OopMapCache::compute_one_oop_map(methodHandle(THREAD, get_Method()), bci, &mask); 402 int mask_size = max_locals(); 403 ResourceBitMap result(mask_size); 404 int i; 405 for (i = 0; i < mask_size ; i++ ) { 406 if (mask.is_oop(i)) result.set_bit(i); 407 } 408 return result; 409 } 410 411 412 #ifdef COMPILER1 413 // ------------------------------------------------------------------ 414 // ciMethod::bci_block_start 415 // 416 // Marks all bcis where a new basic block starts 417 const BitMap& ciMethod::bci_block_start() { 418 check_is_loaded(); 419 if (_liveness == NULL) { 420 // Create the liveness analyzer. 421 Arena* arena = CURRENT_ENV->arena(); 422 _liveness = new (arena) MethodLiveness(arena, this); 423 _liveness->compute_liveness(); 424 } 425 426 return _liveness->get_bci_block_start(); 427 } 428 #endif // COMPILER1 429 430 431 // ------------------------------------------------------------------ 432 // ciMethod::check_overflow 433 // 434 // Check whether the profile counter is overflowed and adjust if true. 435 // For invoke* it will turn negative values into max_jint, 436 // and for checkcast/aastore/instanceof turn positive values into min_jint. 437 int ciMethod::check_overflow(int c, Bytecodes::Code code) { 438 switch (code) { 439 case Bytecodes::_aastore: // fall-through 440 case Bytecodes::_checkcast: // fall-through 441 case Bytecodes::_instanceof: { 442 return (c > 0 ? min_jint : c); // always non-positive 443 } 444 default: { 445 assert(Bytecodes::is_invoke(code), "%s", Bytecodes::name(code)); 446 return (c < 0 ? max_jint : c); // always non-negative 447 } 448 } 449 } 450 451 452 // ------------------------------------------------------------------ 453 // ciMethod::call_profile_at_bci 454 // 455 // Get the ciCallProfile for the invocation of this method. 456 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 457 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 458 ResourceMark rm; 459 ciCallProfile result; 460 if (method_data() != NULL && method_data()->is_mature()) { 461 ciProfileData* data = method_data()->bci_to_data(bci); 462 if (data != NULL && data->is_CounterData()) { 463 // Every profiled call site has a counter. 464 int count = check_overflow(data->as_CounterData()->count(), java_code_at_bci(bci)); 465 466 if (!data->is_ReceiverTypeData()) { 467 result._receiver_count[0] = 0; // that's a definite zero 468 } else { // ReceiverTypeData is a subclass of CounterData 469 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 470 // In addition, virtual call sites have receiver type information 471 int receivers_count_total = 0; 472 int morphism = 0; 473 // Precompute morphism for the possible fixup 474 for (uint i = 0; i < call->row_limit(); i++) { 475 ciKlass* receiver = call->receiver(i); 476 if (receiver == NULL) continue; 477 morphism++; 478 } 479 int epsilon = 0; 480 // For a call, it is assumed that either the type of the receiver(s) 481 // is recorded or an associated counter is incremented, but not both. With 482 // tiered compilation, however, both can happen due to the interpreter and 483 // C1 profiling invocations differently. Address that inconsistency here. 484 if (morphism == 1 && count > 0) { 485 epsilon = count; 486 count = 0; 487 } 488 for (uint i = 0; i < call->row_limit(); i++) { 489 ciKlass* receiver = call->receiver(i); 490 if (receiver == NULL) continue; 491 int rcount = saturated_add(call->receiver_count(i), epsilon); 492 if (rcount == 0) rcount = 1; // Should be valid value 493 receivers_count_total = saturated_add(receivers_count_total, rcount); 494 // Add the receiver to result data. 495 result.add_receiver(receiver, rcount); 496 // If we extend profiling to record methods, 497 // we will set result._method also. 498 } 499 // Determine call site's morphism. 500 // The call site count is 0 with known morphism (only 1 or 2 receivers) 501 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 502 // The call site count is > 0 in the case of a polymorphic virtual call. 503 if (morphism > 0 && morphism == result._limit) { 504 // The morphism <= MorphismLimit. 505 if ((morphism < ciCallProfile::MorphismLimit) || 506 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 507 #ifdef ASSERT 508 if (count > 0) { 509 this->print_short_name(tty); 510 tty->print_cr(" @ bci:%d", bci); 511 this->print_codes(); 512 assert(false, "this call site should not be polymorphic"); 513 } 514 #endif 515 result._morphism = morphism; 516 } 517 } 518 // Make the count consistent if this is a call profile. If count is 519 // zero or less, presume that this is a typecheck profile and 520 // do nothing. Otherwise, increase count to be the sum of all 521 // receiver's counts. 522 if (count >= 0) { 523 count = saturated_add(count, receivers_count_total); 524 } 525 } 526 result._count = count; 527 } 528 } 529 return result; 530 } 531 532 // ------------------------------------------------------------------ 533 // Add new receiver and sort data by receiver's profile count. 534 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 535 // Add new receiver and sort data by receiver's counts when we have space 536 // for it otherwise replace the less called receiver (less called receiver 537 // is placed to the last array element which is not used). 538 // First array's element contains most called receiver. 539 int i = _limit; 540 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 541 _receiver[i] = _receiver[i-1]; 542 _receiver_count[i] = _receiver_count[i-1]; 543 } 544 _receiver[i] = receiver; 545 _receiver_count[i] = receiver_count; 546 if (_limit < MorphismLimit) _limit++; 547 } 548 549 550 void ciMethod::assert_virtual_call_type_ok(int bci) { 551 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 552 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 553 } 554 555 void ciMethod::assert_call_type_ok(int bci) { 556 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 557 java_code_at_bci(bci) == Bytecodes::_invokespecial || 558 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 559 } 560 561 /** 562 * Check whether profiling provides a type for the argument i to the 563 * call at bci bci 564 * 565 * @param [in]bci bci of the call 566 * @param [in]i argument number 567 * @param [out]type profiled type of argument, NULL if none 568 * @param [out]ptr_kind whether always null, never null or maybe null 569 * @return true if profiling exists 570 * 571 */ 572 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 573 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 574 ciProfileData* data = method_data()->bci_to_data(bci); 575 if (data != NULL) { 576 if (data->is_VirtualCallTypeData()) { 577 assert_virtual_call_type_ok(bci); 578 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 579 if (i >= call->number_of_arguments()) { 580 return false; 581 } 582 type = call->valid_argument_type(i); 583 ptr_kind = call->argument_ptr_kind(i); 584 return true; 585 } else if (data->is_CallTypeData()) { 586 assert_call_type_ok(bci); 587 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 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 } 595 } 596 } 597 return false; 598 } 599 600 /** 601 * Check whether profiling provides a type for the return value from 602 * the call at bci bci 603 * 604 * @param [in]bci bci of the call 605 * @param [out]type profiled type of argument, NULL if none 606 * @param [out]ptr_kind whether always null, never null or maybe null 607 * @return true if profiling exists 608 * 609 */ 610 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 611 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 612 ciProfileData* data = method_data()->bci_to_data(bci); 613 if (data != NULL) { 614 if (data->is_VirtualCallTypeData()) { 615 assert_virtual_call_type_ok(bci); 616 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 617 if (call->has_return()) { 618 type = call->valid_return_type(); 619 ptr_kind = call->return_ptr_kind(); 620 return true; 621 } 622 } else if (data->is_CallTypeData()) { 623 assert_call_type_ok(bci); 624 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 625 if (call->has_return()) { 626 type = call->valid_return_type(); 627 ptr_kind = call->return_ptr_kind(); 628 } 629 return true; 630 } 631 } 632 } 633 return false; 634 } 635 636 /** 637 * Check whether profiling provides a type for the parameter i 638 * 639 * @param [in]i parameter number 640 * @param [out]type profiled type of parameter, NULL if none 641 * @param [out]ptr_kind whether always null, never null or maybe null 642 * @return true if profiling exists 643 * 644 */ 645 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 646 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 647 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 648 if (parameters != NULL && i < parameters->number_of_parameters()) { 649 type = parameters->valid_parameter_type(i); 650 ptr_kind = parameters->parameter_ptr_kind(i); 651 return true; 652 } 653 } 654 return false; 655 } 656 657 658 // ------------------------------------------------------------------ 659 // ciMethod::find_monomorphic_target 660 // 661 // Given a certain calling environment, find the monomorphic target 662 // for the call. Return NULL if the call is not monomorphic in 663 // its calling environment, or if there are only abstract methods. 664 // The returned method is never abstract. 665 // Note: If caller uses a non-null result, it must inform dependencies 666 // via assert_unique_concrete_method or assert_leaf_type. 667 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 668 ciInstanceKlass* callee_holder, 669 ciInstanceKlass* actual_recv, 670 bool check_access) { 671 check_is_loaded(); 672 673 if (actual_recv->is_interface()) { 674 // %%% We cannot trust interface types, yet. See bug 6312651. 675 return NULL; 676 } 677 678 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access, true /* allow_abstract */); 679 if (root_m == NULL) { 680 // Something went wrong looking up the actual receiver method. 681 return NULL; 682 } 683 684 // Make certain quick checks even if UseCHA is false. 685 686 // Is it private or final? 687 if (root_m->can_be_statically_bound()) { 688 assert(!root_m->is_abstract(), "sanity"); 689 return root_m; 690 } 691 692 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 693 // Easy case. There is no other place to put a method, so don't bother 694 // to go through the VM_ENTRY_MARK and all the rest. 695 if (root_m->is_abstract()) { 696 return NULL; 697 } 698 return root_m; 699 } 700 701 // Array methods (clone, hashCode, etc.) are always statically bound. 702 // If we were to see an array type here, we'd return root_m. 703 // However, this method processes only ciInstanceKlasses. (See 4962591.) 704 // The inline_native_clone intrinsic narrows Object to T[] properly, 705 // so there is no need to do the same job here. 706 707 if (!UseCHA) return NULL; 708 709 VM_ENTRY_MARK; 710 711 methodHandle target; 712 { 713 MutexLocker locker(Compile_lock); 714 InstanceKlass* context = actual_recv->get_instanceKlass(); 715 if (UseVtableBasedCHA) { 716 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, 717 root_m->get_Method(), 718 callee_holder->get_Klass(), 719 this->get_Method())); 720 } else { 721 if (root_m->is_abstract()) { 722 return NULL; // not supported 723 } 724 target = methodHandle(THREAD, Dependencies::find_unique_concrete_method(context, root_m->get_Method())); 725 } 726 assert(target() == NULL || !target()->is_abstract(), "not allowed"); 727 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 728 } 729 730 #ifndef PRODUCT 731 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 732 tty->print("found a non-root unique target method"); 733 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 734 tty->print(" method = "); 735 target->print_short_name(tty); 736 tty->cr(); 737 } 738 #endif //PRODUCT 739 740 if (target() == NULL) { 741 return NULL; 742 } 743 if (target() == root_m->get_Method()) { 744 return root_m; 745 } 746 if (!root_m->is_public() && 747 !root_m->is_protected()) { 748 // If we are going to reason about inheritance, it's easiest 749 // if the method in question is public, protected, or private. 750 // If the answer is not root_m, it is conservatively correct 751 // to return NULL, even if the CHA encountered irrelevant 752 // methods in other packages. 753 // %%% TO DO: Work out logic for package-private methods 754 // with the same name but different vtable indexes. 755 return NULL; 756 } 757 return CURRENT_THREAD_ENV->get_method(target()); 758 } 759 760 // ------------------------------------------------------------------ 761 // ciMethod::can_be_statically_bound 762 // 763 // Tries to determine whether a method can be statically bound in some context. 764 bool ciMethod::can_be_statically_bound(ciInstanceKlass* context) const { 765 return (holder() == context) && can_be_statically_bound(); 766 } 767 768 // ------------------------------------------------------------------ 769 // ciMethod::can_omit_stack_trace 770 // 771 // Tries to determine whether a method can omit stack trace in throw in compiled code. 772 bool ciMethod::can_omit_stack_trace() const { 773 if (!StackTraceInThrowable) { 774 return true; // stack trace is switched off. 775 } 776 if (!OmitStackTraceInFastThrow) { 777 return false; // Have to provide stack trace. 778 } 779 return _can_omit_stack_trace; 780 } 781 782 // ------------------------------------------------------------------ 783 // ciMethod::resolve_invoke 784 // 785 // Given a known receiver klass, find the target for the call. 786 // Return NULL if the call has no target or the target is abstract. 787 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access, bool allow_abstract) { 788 check_is_loaded(); 789 VM_ENTRY_MARK; 790 791 Klass* caller_klass = caller->get_Klass(); 792 Klass* recv = exact_receiver->get_Klass(); 793 Klass* resolved = holder()->get_Klass(); 794 Symbol* h_name = name()->get_symbol(); 795 Symbol* h_signature = signature()->get_symbol(); 796 797 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 798 check_access ? LinkInfo::AccessCheck::required : LinkInfo::AccessCheck::skip, 799 check_access ? LinkInfo::LoaderConstraintCheck::required : LinkInfo::LoaderConstraintCheck::skip); 800 Method* m = NULL; 801 // Only do exact lookup if receiver klass has been linked. Otherwise, 802 // the vtable has not been setup, and the LinkResolver will fail. 803 if (recv->is_array_klass() 804 || 805 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 806 if (holder()->is_interface()) { 807 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 808 } else { 809 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info); 810 } 811 } 812 813 if (m == NULL) { 814 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 815 return NULL; 816 } 817 818 ciMethod* result = this; 819 if (m != get_Method()) { 820 result = CURRENT_THREAD_ENV->get_method(m); 821 } 822 823 if (result->is_abstract() && !allow_abstract) { 824 // Don't return abstract methods because they aren't optimizable or interesting. 825 return NULL; 826 } 827 return result; 828 } 829 830 // ------------------------------------------------------------------ 831 // ciMethod::resolve_vtable_index 832 // 833 // Given a known receiver klass, find the vtable index for the call. 834 // Return Method::invalid_vtable_index if the vtable_index is unknown. 835 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 836 check_is_loaded(); 837 838 int vtable_index = Method::invalid_vtable_index; 839 // Only do lookup if receiver klass has been linked. Otherwise, 840 // the vtable has not been setup, and the LinkResolver will fail. 841 if (!receiver->is_interface() 842 && (!receiver->is_instance_klass() || 843 receiver->as_instance_klass()->is_linked())) { 844 VM_ENTRY_MARK; 845 846 Klass* caller_klass = caller->get_Klass(); 847 Klass* recv = receiver->get_Klass(); 848 Symbol* h_name = name()->get_symbol(); 849 Symbol* h_signature = signature()->get_symbol(); 850 851 LinkInfo link_info(recv, h_name, h_signature, caller_klass); 852 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info); 853 if (vtable_index == Method::nonvirtual_vtable_index) { 854 // A statically bound method. Return "no such index". 855 vtable_index = Method::invalid_vtable_index; 856 } 857 } 858 859 return vtable_index; 860 } 861 862 // ------------------------------------------------------------------ 863 // ciMethod::get_field_at_bci 864 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 865 ciBytecodeStream iter(this); 866 iter.reset_to_bci(bci); 867 iter.next(); 868 return iter.get_field(will_link); 869 } 870 871 // ------------------------------------------------------------------ 872 // ciMethod::get_method_at_bci 873 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 874 ciBytecodeStream iter(this); 875 iter.reset_to_bci(bci); 876 iter.next(); 877 return iter.get_method(will_link, declared_signature); 878 } 879 880 // ------------------------------------------------------------------ 881 ciKlass* ciMethod::get_declared_method_holder_at_bci(int bci) { 882 ciBytecodeStream iter(this); 883 iter.reset_to_bci(bci); 884 iter.next(); 885 return iter.get_declared_method_holder(); 886 } 887 888 // ------------------------------------------------------------------ 889 // Adjust a CounterData count to be commensurate with 890 // interpreter_invocation_count. If the MDO exists for 891 // only 25% of the time the method exists, then the 892 // counts in the MDO should be scaled by 4X, so that 893 // they can be usefully and stably compared against the 894 // invocation counts in methods. 895 int ciMethod::scale_count(int count, float prof_factor) { 896 if (count > 0 && method_data() != NULL) { 897 int counter_life = method_data()->invocation_count(); 898 int method_life = interpreter_invocation_count(); 899 if (method_life < counter_life) { // may happen because of the snapshot timing 900 method_life = counter_life; 901 } 902 if (counter_life > 0) { 903 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 904 count = (count > 0) ? count : 1; 905 } else { 906 count = 1; 907 } 908 } 909 return count; 910 } 911 912 913 // ------------------------------------------------------------------ 914 // ciMethod::is_special_get_caller_class_method 915 // 916 bool ciMethod::is_ignored_by_security_stack_walk() const { 917 check_is_loaded(); 918 VM_ENTRY_MARK; 919 return get_Method()->is_ignored_by_security_stack_walk(); 920 } 921 922 // ------------------------------------------------------------------ 923 // ciMethod::needs_clinit_barrier 924 // 925 bool ciMethod::needs_clinit_barrier() const { 926 check_is_loaded(); 927 return is_static() && !holder()->is_initialized(); 928 } 929 930 // ------------------------------------------------------------------ 931 // invokedynamic support 932 933 // ------------------------------------------------------------------ 934 // ciMethod::is_method_handle_intrinsic 935 // 936 // Return true if the method is an instance of the JVM-generated 937 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 938 bool ciMethod::is_method_handle_intrinsic() const { 939 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 940 return (MethodHandles::is_signature_polymorphic(iid) && 941 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 942 } 943 944 // ------------------------------------------------------------------ 945 // ciMethod::is_compiled_lambda_form 946 // 947 // Return true if the method is a generated MethodHandle adapter. 948 // These are built by Java code. 949 bool ciMethod::is_compiled_lambda_form() const { 950 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 951 return iid == vmIntrinsics::_compiledLambdaForm; 952 } 953 954 // ------------------------------------------------------------------ 955 // ciMethod::is_object_initializer 956 // 957 bool ciMethod::is_object_initializer() const { 958 return name() == ciSymbols::object_initializer_name(); 959 } 960 961 // ------------------------------------------------------------------ 962 // ciMethod::has_member_arg 963 // 964 // Return true if the method is a linker intrinsic like _linkToVirtual. 965 // These are built by the JVM. 966 bool ciMethod::has_member_arg() const { 967 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 968 return (MethodHandles::is_signature_polymorphic(iid) && 969 MethodHandles::has_member_arg(iid)); 970 } 971 972 // ------------------------------------------------------------------ 973 // ciMethod::ensure_method_data 974 // 975 // Generate new MethodData* objects at compile time. 976 // Return true if allocation was successful or no MDO is required. 977 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 978 EXCEPTION_CONTEXT; 979 if (is_native() || is_abstract() || h_m()->is_accessor()) { 980 return true; 981 } 982 if (h_m()->method_data() == NULL) { 983 Method::build_profiling_method_data(h_m, THREAD); 984 if (HAS_PENDING_EXCEPTION) { 985 CLEAR_PENDING_EXCEPTION; 986 } 987 } 988 if (h_m()->method_data() != NULL) { 989 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 990 return _method_data->load_data(); 991 } else { 992 _method_data = CURRENT_ENV->get_empty_methodData(); 993 return false; 994 } 995 } 996 997 // public, retroactive version 998 bool ciMethod::ensure_method_data() { 999 bool result = true; 1000 if (_method_data == NULL || _method_data->is_empty()) { 1001 GUARDED_VM_ENTRY({ 1002 methodHandle mh(Thread::current(), get_Method()); 1003 result = ensure_method_data(mh); 1004 }); 1005 } 1006 return result; 1007 } 1008 1009 1010 // ------------------------------------------------------------------ 1011 // ciMethod::method_data 1012 // 1013 ciMethodData* ciMethod::method_data() { 1014 if (_method_data != NULL) { 1015 return _method_data; 1016 } 1017 VM_ENTRY_MARK; 1018 ciEnv* env = CURRENT_ENV; 1019 Thread* my_thread = JavaThread::current(); 1020 methodHandle h_m(my_thread, get_Method()); 1021 1022 if (h_m()->method_data() != NULL) { 1023 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1024 _method_data->load_data(); 1025 } else { 1026 _method_data = CURRENT_ENV->get_empty_methodData(); 1027 } 1028 return _method_data; 1029 1030 } 1031 1032 // ------------------------------------------------------------------ 1033 // ciMethod::method_data_or_null 1034 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1035 // NULL otherwise. 1036 ciMethodData* ciMethod::method_data_or_null() { 1037 ciMethodData *md = method_data(); 1038 if (md->is_empty()) { 1039 return NULL; 1040 } 1041 return md; 1042 } 1043 1044 // ------------------------------------------------------------------ 1045 // ciMethod::ensure_method_counters 1046 // 1047 MethodCounters* ciMethod::ensure_method_counters() { 1048 check_is_loaded(); 1049 VM_ENTRY_MARK; 1050 methodHandle mh(THREAD, get_Method()); 1051 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1052 return method_counters; 1053 } 1054 1055 // ------------------------------------------------------------------ 1056 // ciMethod::has_option 1057 // 1058 bool ciMethod::has_option(enum CompileCommand option) { 1059 check_is_loaded(); 1060 VM_ENTRY_MARK; 1061 methodHandle mh(THREAD, get_Method()); 1062 return CompilerOracle::has_option(mh, option); 1063 } 1064 1065 // ------------------------------------------------------------------ 1066 // ciMethod::has_option_value 1067 // 1068 bool ciMethod::has_option_value(enum CompileCommand option, double& value) { 1069 check_is_loaded(); 1070 VM_ENTRY_MARK; 1071 methodHandle mh(THREAD, get_Method()); 1072 return CompilerOracle::has_option_value(mh, option, value); 1073 } 1074 // ------------------------------------------------------------------ 1075 // ciMethod::can_be_compiled 1076 // 1077 // Have previous compilations of this method succeeded? 1078 bool ciMethod::can_be_compiled() { 1079 check_is_loaded(); 1080 ciEnv* env = CURRENT_ENV; 1081 if (is_c1_compile(env->comp_level())) { 1082 return _is_c1_compilable; 1083 } 1084 return _is_c2_compilable; 1085 } 1086 1087 // ------------------------------------------------------------------ 1088 // ciMethod::has_compiled_code 1089 bool ciMethod::has_compiled_code() { 1090 return instructions_size() > 0; 1091 } 1092 1093 int ciMethod::highest_osr_comp_level() { 1094 check_is_loaded(); 1095 VM_ENTRY_MARK; 1096 return get_Method()->highest_osr_comp_level(); 1097 } 1098 1099 // ------------------------------------------------------------------ 1100 // ciMethod::code_size_for_inlining 1101 // 1102 // Code size for inlining decisions. This method returns a code 1103 // size of 1 for methods which has the ForceInline annotation. 1104 int ciMethod::code_size_for_inlining() { 1105 check_is_loaded(); 1106 if (get_Method()->force_inline()) { 1107 return 1; 1108 } 1109 return code_size(); 1110 } 1111 1112 // ------------------------------------------------------------------ 1113 // ciMethod::instructions_size 1114 // 1115 // This is a rough metric for "fat" methods, compared before inlining 1116 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1117 // junk like exception handler, stubs, and constant table, which are 1118 // not highly relevant to an inlined method. So we use the more 1119 // specific accessor nmethod::insts_size. 1120 int ciMethod::instructions_size() { 1121 if (_instructions_size == -1) { 1122 GUARDED_VM_ENTRY( 1123 CompiledMethod* code = get_Method()->code(); 1124 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1125 _instructions_size = code->insts_end() - code->verified_entry_point(); 1126 } else { 1127 _instructions_size = 0; 1128 } 1129 ); 1130 } 1131 return _instructions_size; 1132 } 1133 1134 // ------------------------------------------------------------------ 1135 // ciMethod::log_nmethod_identity 1136 void ciMethod::log_nmethod_identity(xmlStream* log) { 1137 GUARDED_VM_ENTRY( 1138 CompiledMethod* code = get_Method()->code(); 1139 if (code != NULL) { 1140 code->log_identity(log); 1141 } 1142 ) 1143 } 1144 1145 // ------------------------------------------------------------------ 1146 // ciMethod::is_not_reached 1147 bool ciMethod::is_not_reached(int bci) { 1148 check_is_loaded(); 1149 VM_ENTRY_MARK; 1150 return Interpreter::is_not_reached( 1151 methodHandle(THREAD, get_Method()), bci); 1152 } 1153 1154 // ------------------------------------------------------------------ 1155 // ciMethod::was_never_executed 1156 bool ciMethod::was_executed_more_than(int times) { 1157 VM_ENTRY_MARK; 1158 return get_Method()->was_executed_more_than(times); 1159 } 1160 1161 // ------------------------------------------------------------------ 1162 // ciMethod::has_unloaded_classes_in_signature 1163 bool ciMethod::has_unloaded_classes_in_signature() { 1164 // ciSignature is resolved against some accessing class and 1165 // signature classes aren't required to be local. As a benefit, 1166 // it makes signature classes visible through loader constraints. 1167 // So, encountering an unloaded class signals it is absent both in 1168 // the callee (local) and caller contexts. 1169 return signature()->has_unloaded_classes(); 1170 } 1171 1172 // ------------------------------------------------------------------ 1173 // ciMethod::is_klass_loaded 1174 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1175 VM_ENTRY_MARK; 1176 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1177 } 1178 1179 // ------------------------------------------------------------------ 1180 // ciMethod::check_call 1181 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1182 // This method is used only in C2 from InlineTree::ok_to_inline, 1183 // and is only used under -Xcomp. 1184 // It appears to fail when applied to an invokeinterface call site. 1185 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1186 VM_ENTRY_MARK; 1187 { 1188 ExceptionMark em(THREAD); 1189 HandleMark hm(THREAD); 1190 constantPoolHandle pool (THREAD, get_Method()->constants()); 1191 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1192 Method* spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1193 if (HAS_PENDING_EXCEPTION) { 1194 CLEAR_PENDING_EXCEPTION; 1195 return false; 1196 } else { 1197 return (spec_method->is_static() == is_static); 1198 } 1199 } 1200 return false; 1201 } 1202 // ------------------------------------------------------------------ 1203 // ciMethod::print_codes 1204 // 1205 // Print the bytecodes for this method. 1206 void ciMethod::print_codes_on(outputStream* st) { 1207 check_is_loaded(); 1208 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1209 } 1210 1211 1212 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1213 check_is_loaded(); \ 1214 VM_ENTRY_MARK; \ 1215 return get_Method()->flag_accessor(); \ 1216 } 1217 1218 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1219 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1220 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1221 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1222 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1223 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1224 bool ciMethod::is_empty () const { FETCH_FLAG_FROM_VM(is_empty_method); } 1225 1226 bool ciMethod::is_boxing_method() const { 1227 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) { 1228 switch (intrinsic_id()) { 1229 case vmIntrinsics::_Boolean_valueOf: 1230 case vmIntrinsics::_Byte_valueOf: 1231 case vmIntrinsics::_Character_valueOf: 1232 case vmIntrinsics::_Short_valueOf: 1233 case vmIntrinsics::_Integer_valueOf: 1234 case vmIntrinsics::_Long_valueOf: 1235 case vmIntrinsics::_Float_valueOf: 1236 case vmIntrinsics::_Double_valueOf: 1237 return true; 1238 default: 1239 return false; 1240 } 1241 } 1242 return false; 1243 } 1244 1245 bool ciMethod::is_unboxing_method() const { 1246 if (intrinsic_id() != vmIntrinsics::_none && holder()->is_box_klass()) { 1247 switch (intrinsic_id()) { 1248 case vmIntrinsics::_booleanValue: 1249 case vmIntrinsics::_byteValue: 1250 case vmIntrinsics::_charValue: 1251 case vmIntrinsics::_shortValue: 1252 case vmIntrinsics::_intValue: 1253 case vmIntrinsics::_longValue: 1254 case vmIntrinsics::_floatValue: 1255 case vmIntrinsics::_doubleValue: 1256 return true; 1257 default: 1258 return false; 1259 } 1260 } 1261 return false; 1262 } 1263 1264 bool ciMethod::is_vector_method() const { 1265 return (holder() == ciEnv::current()->vector_VectorSupport_klass()) && 1266 (intrinsic_id() != vmIntrinsics::_none); 1267 } 1268 1269 BCEscapeAnalyzer *ciMethod::get_bcea() { 1270 #ifdef COMPILER2 1271 if (_bcea == NULL) { 1272 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1273 } 1274 return _bcea; 1275 #else // COMPILER2 1276 ShouldNotReachHere(); 1277 return NULL; 1278 #endif // COMPILER2 1279 } 1280 1281 ciMethodBlocks *ciMethod::get_method_blocks() { 1282 if (_method_blocks == NULL) { 1283 Arena *arena = CURRENT_ENV->arena(); 1284 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1285 } 1286 return _method_blocks; 1287 } 1288 1289 #undef FETCH_FLAG_FROM_VM 1290 1291 void ciMethod::dump_name_as_ascii(outputStream* st, Method* method) { 1292 st->print("%s %s %s", 1293 CURRENT_ENV->replay_name(method->method_holder()), 1294 method->name()->as_quoted_ascii(), 1295 method->signature()->as_quoted_ascii()); 1296 } 1297 1298 void ciMethod::dump_name_as_ascii(outputStream* st) { 1299 Method* method = get_Method(); 1300 dump_name_as_ascii(st, method); 1301 } 1302 1303 void ciMethod::dump_replay_data(outputStream* st) { 1304 ResourceMark rm; 1305 Method* method = get_Method(); 1306 if (MethodHandles::is_signature_polymorphic_method(method)) { 1307 // ignore for now 1308 return; 1309 } 1310 MethodCounters* mcs = method->method_counters(); 1311 st->print("ciMethod "); 1312 dump_name_as_ascii(st); 1313 st->print_cr(" %d %d %d %d %d", 1314 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1315 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1316 interpreter_invocation_count(), 1317 interpreter_throwout_count(), 1318 _instructions_size); 1319 } 1320 1321 // ------------------------------------------------------------------ 1322 // ciMethod::print_codes 1323 // 1324 // Print a range of the bytecodes for this method. 1325 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1326 check_is_loaded(); 1327 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1328 } 1329 1330 // ------------------------------------------------------------------ 1331 // ciMethod::print_name 1332 // 1333 // Print the name of this method, including signature and some flags. 1334 void ciMethod::print_name(outputStream* st) { 1335 check_is_loaded(); 1336 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1337 } 1338 1339 // ------------------------------------------------------------------ 1340 // ciMethod::print_short_name 1341 // 1342 // Print the name of this method, without signature. 1343 void ciMethod::print_short_name(outputStream* st) { 1344 if (is_loaded()) { 1345 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1346 } else { 1347 // Fall back if method is not loaded. 1348 holder()->print_name_on(st); 1349 st->print("::"); 1350 name()->print_symbol_on(st); 1351 if (WizardMode) 1352 signature()->as_symbol()->print_symbol_on(st); 1353 } 1354 } 1355 1356 // ------------------------------------------------------------------ 1357 // ciMethod::print_impl 1358 // 1359 // Implementation of the print method. 1360 void ciMethod::print_impl(outputStream* st) { 1361 ciMetadata::print_impl(st); 1362 st->print(" name="); 1363 name()->print_symbol_on(st); 1364 st->print(" holder="); 1365 holder()->print_name_on(st); 1366 st->print(" signature="); 1367 signature()->as_symbol()->print_symbol_on(st); 1368 if (is_loaded()) { 1369 st->print(" loaded=true"); 1370 st->print(" arg_size=%d", arg_size()); 1371 st->print(" flags="); 1372 flags().print_member_flags(st); 1373 } else { 1374 st->print(" loaded=false"); 1375 } 1376 } 1377 1378 // ------------------------------------------------------------------ 1379 1380 static BasicType erase_to_word_type(BasicType bt) { 1381 if (is_subword_type(bt)) return T_INT; 1382 if (is_reference_type(bt)) return T_OBJECT; 1383 return bt; 1384 } 1385 1386 static bool basic_types_match(ciType* t1, ciType* t2) { 1387 if (t1 == t2) return true; 1388 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1389 } 1390 1391 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1392 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1393 !resolved_method->is_method_handle_intrinsic(); 1394 1395 if (!invoke_through_mh_intrinsic) { 1396 // Method name & descriptor should stay the same. 1397 // Signatures may reference unloaded types and thus they may be not strictly equal. 1398 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1399 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1400 1401 return (declared_method->name()->equals(resolved_method->name())) && 1402 (declared_signature->equals(resolved_signature)); 1403 } 1404 1405 ciMethod* linker = declared_method; 1406 ciMethod* target = resolved_method; 1407 // Linkers have appendix argument which is not passed to callee. 1408 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1409 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1410 return false; // argument slot count mismatch 1411 } 1412 1413 ciSignature* linker_sig = linker->signature(); 1414 ciSignature* target_sig = target->signature(); 1415 1416 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1417 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1418 return false; // argument count mismatch 1419 } 1420 1421 int sbase = 0, rbase = 0; 1422 switch (linker->intrinsic_id()) { 1423 case vmIntrinsics::_linkToVirtual: 1424 case vmIntrinsics::_linkToInterface: 1425 case vmIntrinsics::_linkToSpecial: { 1426 if (target->is_static()) { 1427 return false; 1428 } 1429 if (linker_sig->type_at(0)->is_primitive_type()) { 1430 return false; // receiver should be an oop 1431 } 1432 sbase = 1; // skip receiver 1433 break; 1434 } 1435 case vmIntrinsics::_linkToStatic: { 1436 if (!target->is_static()) { 1437 return false; 1438 } 1439 break; 1440 } 1441 case vmIntrinsics::_invokeBasic: { 1442 if (target->is_static()) { 1443 if (target_sig->type_at(0)->is_primitive_type()) { 1444 return false; // receiver should be an oop 1445 } 1446 rbase = 1; // skip receiver 1447 } 1448 break; 1449 } 1450 default: 1451 break; 1452 } 1453 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1454 int arg_count = target_sig->count() - rbase; 1455 for (int i = 0; i < arg_count; i++) { 1456 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1457 return false; 1458 } 1459 } 1460 // Only check the return type if the symbolic info has non-void return type. 1461 // I.e. the return value of the resolved method can be dropped. 1462 if (!linker->return_type()->is_void() && 1463 !basic_types_match(linker->return_type(), target->return_type())) { 1464 return false; 1465 } 1466 return true; // no mismatch found 1467 } 1468 1469 // ------------------------------------------------------------------