1 /* 2 * Copyright (c) 1999, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciCallProfile.hpp" 27 #include "ci/ciExceptionHandler.hpp" 28 #include "ci/ciInstanceKlass.hpp" 29 #include "ci/ciMethod.hpp" 30 #include "ci/ciMethodBlocks.hpp" 31 #include "ci/ciMethodData.hpp" 32 #include "ci/ciStreams.hpp" 33 #include "ci/ciSymbol.hpp" 34 #include "ci/ciReplay.hpp" 35 #include "ci/ciUtilities.inline.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/methodLiveness.hpp" 39 #include "interpreter/interpreter.hpp" 40 #include "interpreter/linkResolver.hpp" 41 #include "interpreter/oopMapCache.hpp" 42 #include "memory/allocation.inline.hpp" 43 #include "memory/resourceArea.hpp" 44 #include "oops/generateOopMap.hpp" 45 #include "oops/method.inline.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "runtime/deoptimization.hpp" 49 #include "utilities/bitMap.inline.hpp" 50 #include "utilities/xmlstream.hpp" 51 #ifdef COMPILER2 52 #include "ci/bcEscapeAnalyzer.hpp" 53 #include "ci/ciTypeFlow.hpp" 54 #include "oops/method.hpp" 55 #endif 56 57 // ciMethod 58 // 59 // This class represents a Method* in the HotSpot virtual 60 // machine. 61 62 63 // ------------------------------------------------------------------ 64 // ciMethod::ciMethod 65 // 66 // Loaded method. 67 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 68 ciMetadata(h_m()), 69 _holder(holder) 70 { 71 assert(h_m() != NULL, "no null method"); 72 73 if (LogTouchedMethods) { 74 h_m()->log_touched(Thread::current()); 75 } 76 // These fields are always filled in in loaded methods. 77 _flags = ciFlags(h_m()->access_flags()); 78 79 // Easy to compute, so fill them in now. 80 _max_stack = h_m()->max_stack(); 81 _max_locals = h_m()->max_locals(); 82 _code_size = h_m()->code_size(); 83 _intrinsic_id = h_m()->intrinsic_id(); 84 _handler_count = h_m()->exception_table_length(); 85 _size_of_parameters = h_m()->size_of_parameters(); 86 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 87 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 88 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 89 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 90 _can_be_parsed = true; 91 _has_reserved_stack_access = h_m()->has_reserved_stack_access(); 92 // Lazy fields, filled in on demand. Require allocation. 93 _code = NULL; 94 _exception_handlers = NULL; 95 _liveness = NULL; 96 _method_blocks = NULL; 97 #if defined(COMPILER2) 98 _flow = NULL; 99 _bcea = NULL; 100 #endif // COMPILER2 101 102 ciEnv *env = CURRENT_ENV; 103 if (env->jvmti_can_hotswap_or_post_breakpoint()) { 104 // 6328518 check hotswap conditions under the right lock. 105 MutexLocker locker(Compile_lock); 106 if (Dependencies::check_evol_method(h_m()) != NULL) { 107 _is_c1_compilable = false; 108 _is_c2_compilable = false; 109 _can_be_parsed = false; 110 } 111 } else { 112 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 113 } 114 115 if (h_m()->method_holder()->is_linked()) { 116 _can_be_statically_bound = h_m()->can_be_statically_bound(); 117 } else { 118 // Have to use a conservative value in this case. 119 _can_be_statically_bound = false; 120 } 121 122 // Adjust the definition of this condition to be more useful: 123 // %%% take these conditions into account in vtable generation 124 if (!_can_be_statically_bound && h_m()->is_private()) 125 _can_be_statically_bound = true; 126 if (_can_be_statically_bound && h_m()->is_abstract()) 127 _can_be_statically_bound = false; 128 129 // generating _signature may allow GC and therefore move m. 130 // These fields are always filled in. 131 _name = env->get_symbol(h_m()->name()); 132 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 133 constantPoolHandle cpool = h_m()->constants(); 134 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 135 _method_data = NULL; 136 _nmethod_age = h_m()->nmethod_age(); 137 // Take a snapshot of these values, so they will be commensurate with the MDO. 138 if (ProfileInterpreter || TieredCompilation) { 139 int invcnt = h_m()->interpreter_invocation_count(); 140 // if the value overflowed report it as max int 141 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 142 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 143 } else { 144 _interpreter_invocation_count = 0; 145 _interpreter_throwout_count = 0; 146 } 147 if (_interpreter_invocation_count == 0) 148 _interpreter_invocation_count = 1; 149 _instructions_size = -1; 150 #ifdef ASSERT 151 if (ReplayCompiles) { 152 ciReplay::initialize(this); 153 } 154 #endif 155 } 156 157 158 // ------------------------------------------------------------------ 159 // ciMethod::ciMethod 160 // 161 // Unloaded method. 162 ciMethod::ciMethod(ciInstanceKlass* holder, 163 ciSymbol* name, 164 ciSymbol* signature, 165 ciInstanceKlass* accessor) : 166 ciMetadata((Metadata*)NULL), 167 _name( name), 168 _holder( holder), 169 _intrinsic_id( vmIntrinsics::_none), 170 _liveness( NULL), 171 _can_be_statically_bound(false), 172 _method_blocks( NULL), 173 _method_data( NULL) 174 #if defined(COMPILER2) 175 , 176 _flow( NULL), 177 _bcea( NULL), 178 _instructions_size(-1) 179 #endif // COMPILER2 180 { 181 // Usually holder and accessor are the same type but in some cases 182 // the holder has the wrong class loader (e.g. invokedynamic call 183 // sites) so we pass the accessor. 184 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 185 } 186 187 188 // ------------------------------------------------------------------ 189 // ciMethod::load_code 190 // 191 // Load the bytecodes and exception handler table for this method. 192 void ciMethod::load_code() { 193 VM_ENTRY_MARK; 194 assert(is_loaded(), "only loaded methods have code"); 195 196 Method* me = get_Method(); 197 Arena* arena = CURRENT_THREAD_ENV->arena(); 198 199 // Load the bytecodes. 200 _code = (address)arena->Amalloc(code_size()); 201 memcpy(_code, me->code_base(), code_size()); 202 203 #if INCLUDE_JVMTI 204 // Revert any breakpoint bytecodes in ci's copy 205 if (me->number_of_breakpoints() > 0) { 206 BreakpointInfo* bp = me->method_holder()->breakpoints(); 207 for (; bp != NULL; bp = bp->next()) { 208 if (bp->match(me)) { 209 code_at_put(bp->bci(), bp->orig_bytecode()); 210 } 211 } 212 } 213 #endif 214 215 // And load the exception table. 216 ExceptionTable exc_table(me); 217 218 // Allocate one extra spot in our list of exceptions. This 219 // last entry will be used to represent the possibility that 220 // an exception escapes the method. See ciExceptionHandlerStream 221 // for details. 222 _exception_handlers = 223 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 224 * (_handler_count + 1)); 225 if (_handler_count > 0) { 226 for (int i=0; i<_handler_count; i++) { 227 _exception_handlers[i] = new (arena) ciExceptionHandler( 228 holder(), 229 /* start */ exc_table.start_pc(i), 230 /* limit */ exc_table.end_pc(i), 231 /* goto pc */ exc_table.handler_pc(i), 232 /* cp index */ exc_table.catch_type_index(i)); 233 } 234 } 235 236 // Put an entry at the end of our list to represent the possibility 237 // of exceptional exit. 238 _exception_handlers[_handler_count] = 239 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 240 241 if (CIPrintMethodCodes) { 242 print_codes(); 243 } 244 } 245 246 247 // ------------------------------------------------------------------ 248 // ciMethod::has_linenumber_table 249 // 250 // length unknown until decompression 251 bool ciMethod::has_linenumber_table() const { 252 check_is_loaded(); 253 VM_ENTRY_MARK; 254 return get_Method()->has_linenumber_table(); 255 } 256 257 258 // ------------------------------------------------------------------ 259 // ciMethod::compressed_linenumber_table 260 u_char* ciMethod::compressed_linenumber_table() const { 261 check_is_loaded(); 262 VM_ENTRY_MARK; 263 return get_Method()->compressed_linenumber_table(); 264 } 265 266 267 // ------------------------------------------------------------------ 268 // ciMethod::line_number_from_bci 269 int ciMethod::line_number_from_bci(int bci) const { 270 check_is_loaded(); 271 VM_ENTRY_MARK; 272 return get_Method()->line_number_from_bci(bci); 273 } 274 275 276 // ------------------------------------------------------------------ 277 // ciMethod::vtable_index 278 // 279 // Get the position of this method's entry in the vtable, if any. 280 int ciMethod::vtable_index() { 281 check_is_loaded(); 282 assert(holder()->is_linked(), "must be linked"); 283 VM_ENTRY_MARK; 284 return get_Method()->vtable_index(); 285 } 286 287 288 // ------------------------------------------------------------------ 289 // ciMethod::native_entry 290 // 291 // Get the address of this method's native code, if any. 292 address ciMethod::native_entry() { 293 check_is_loaded(); 294 assert(flags().is_native(), "must be native method"); 295 VM_ENTRY_MARK; 296 Method* method = get_Method(); 297 address entry = method->native_function(); 298 assert(entry != NULL, "must be valid entry point"); 299 return entry; 300 } 301 302 303 // ------------------------------------------------------------------ 304 // ciMethod::interpreter_entry 305 // 306 // Get the entry point for running this method in the interpreter. 307 address ciMethod::interpreter_entry() { 308 check_is_loaded(); 309 VM_ENTRY_MARK; 310 methodHandle mh(THREAD, get_Method()); 311 return Interpreter::entry_for_method(mh); 312 } 313 314 315 // ------------------------------------------------------------------ 316 // ciMethod::uses_balanced_monitors 317 // 318 // Does this method use monitors in a strict stack-disciplined manner? 319 bool ciMethod::has_balanced_monitors() { 320 check_is_loaded(); 321 if (_balanced_monitors) return true; 322 323 // Analyze the method to see if monitors are used properly. 324 VM_ENTRY_MARK; 325 methodHandle method(THREAD, get_Method()); 326 assert(method->has_monitor_bytecodes(), "should have checked this"); 327 328 // Check to see if a previous compilation computed the 329 // monitor-matching analysis. 330 if (method->guaranteed_monitor_matching()) { 331 _balanced_monitors = true; 332 return true; 333 } 334 335 { 336 EXCEPTION_MARK; 337 ResourceMark rm(THREAD); 338 GeneratePairingInfo gpi(method); 339 gpi.compute_map(CATCH); 340 if (!gpi.monitor_safe()) { 341 return false; 342 } 343 method->set_guaranteed_monitor_matching(); 344 _balanced_monitors = true; 345 } 346 return true; 347 } 348 349 350 // ------------------------------------------------------------------ 351 // ciMethod::get_flow_analysis 352 ciTypeFlow* ciMethod::get_flow_analysis() { 353 #if defined(COMPILER2) 354 if (_flow == NULL) { 355 ciEnv* env = CURRENT_ENV; 356 _flow = new (env->arena()) ciTypeFlow(env, this); 357 _flow->do_flow(); 358 } 359 return _flow; 360 #else // COMPILER2 361 ShouldNotReachHere(); 362 return NULL; 363 #endif // COMPILER2 364 } 365 366 367 // ------------------------------------------------------------------ 368 // ciMethod::get_osr_flow_analysis 369 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 370 #if defined(COMPILER2) 371 // OSR entry points are always place after a call bytecode of some sort 372 assert(osr_bci >= 0, "must supply valid OSR entry point"); 373 ciEnv* env = CURRENT_ENV; 374 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 375 flow->do_flow(); 376 return flow; 377 #else // COMPILER2 378 ShouldNotReachHere(); 379 return NULL; 380 #endif // COMPILER2 381 } 382 383 // ------------------------------------------------------------------ 384 // ciMethod::raw_liveness_at_bci 385 // 386 // Which local variables are live at a specific bci? 387 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 388 check_is_loaded(); 389 if (_liveness == NULL) { 390 // Create the liveness analyzer. 391 Arena* arena = CURRENT_ENV->arena(); 392 _liveness = new (arena) MethodLiveness(arena, this); 393 _liveness->compute_liveness(); 394 } 395 return _liveness->get_liveness_at(bci); 396 } 397 398 // ------------------------------------------------------------------ 399 // ciMethod::liveness_at_bci 400 // 401 // Which local variables are live at a specific bci? When debugging 402 // will return true for all locals in some cases to improve debug 403 // information. 404 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 405 MethodLivenessResult result = raw_liveness_at_bci(bci); 406 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { 407 // Keep all locals live for the user's edification and amusement. 408 result.at_put_range(0, result.size(), true); 409 } 410 return result; 411 } 412 413 // ciMethod::live_local_oops_at_bci 414 // 415 // find all the live oops in the locals array for a particular bci 416 // Compute what the interpreter believes by using the interpreter 417 // oopmap generator. This is used as a double check during osr to 418 // guard against conservative result from MethodLiveness making us 419 // think a dead oop is live. MethodLiveness is conservative in the 420 // sense that it may consider locals to be live which cannot be live, 421 // like in the case where a local could contain an oop or a primitive 422 // along different paths. In that case the local must be dead when 423 // those paths merge. Since the interpreter's viewpoint is used when 424 // gc'ing an interpreter frame we need to use its viewpoint during 425 // OSR when loading the locals. 426 427 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 428 VM_ENTRY_MARK; 429 InterpreterOopMap mask; 430 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 431 int mask_size = max_locals(); 432 ResourceBitMap result(mask_size); 433 int i; 434 for (i = 0; i < mask_size ; i++ ) { 435 if (mask.is_oop(i)) result.set_bit(i); 436 } 437 return result; 438 } 439 440 441 #ifdef COMPILER1 442 // ------------------------------------------------------------------ 443 // ciMethod::bci_block_start 444 // 445 // Marks all bcis where a new basic block starts 446 const BitMap& ciMethod::bci_block_start() { 447 check_is_loaded(); 448 if (_liveness == NULL) { 449 // Create the liveness analyzer. 450 Arena* arena = CURRENT_ENV->arena(); 451 _liveness = new (arena) MethodLiveness(arena, this); 452 _liveness->compute_liveness(); 453 } 454 455 return _liveness->get_bci_block_start(); 456 } 457 #endif // COMPILER1 458 459 460 // ------------------------------------------------------------------ 461 // ciMethod::call_profile_at_bci 462 // 463 // Get the ciCallProfile for the invocation of this method. 464 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 465 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 466 ResourceMark rm; 467 ciCallProfile result; 468 if (method_data() != NULL && method_data()->is_mature()) { 469 ciProfileData* data = method_data()->bci_to_data(bci); 470 if (data != NULL && data->is_CounterData()) { 471 // Every profiled call site has a counter. 472 int count = data->as_CounterData()->count(); 473 474 if (!data->is_ReceiverTypeData()) { 475 result._receiver_count[0] = 0; // that's a definite zero 476 } else { // ReceiverTypeData is a subclass of CounterData 477 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 478 // In addition, virtual call sites have receiver type information 479 int receivers_count_total = 0; 480 int morphism = 0; 481 // Precompute morphism for the possible fixup 482 for (uint i = 0; i < call->row_limit(); i++) { 483 ciKlass* receiver = call->receiver(i); 484 if (receiver == NULL) continue; 485 morphism++; 486 } 487 int epsilon = 0; 488 if (TieredCompilation) { 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 } 498 for (uint i = 0; i < call->row_limit(); i++) { 499 ciKlass* receiver = call->receiver(i); 500 if (receiver == NULL) continue; 501 int rcount = call->receiver_count(i) + epsilon; 502 if (rcount == 0) rcount = 1; // Should be valid value 503 receivers_count_total += rcount; 504 // Add the receiver to result data. 505 result.add_receiver(receiver, rcount); 506 // If we extend profiling to record methods, 507 // we will set result._method also. 508 } 509 // Determine call site's morphism. 510 // The call site count is 0 with known morphism (only 1 or 2 receivers) 511 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 512 // The call site count is > 0 in the case of a polymorphic virtual call. 513 if (morphism > 0 && morphism == result._limit) { 514 // The morphism <= MorphismLimit. 515 if ((morphism < ciCallProfile::MorphismLimit) || 516 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 517 #ifdef ASSERT 518 if (count > 0) { 519 this->print_short_name(tty); 520 tty->print_cr(" @ bci:%d", bci); 521 this->print_codes(); 522 assert(false, "this call site should not be polymorphic"); 523 } 524 #endif 525 result._morphism = morphism; 526 } 527 } 528 // Make the count consistent if this is a call profile. If count is 529 // zero or less, presume that this is a typecheck profile and 530 // do nothing. Otherwise, increase count to be the sum of all 531 // receiver's counts. 532 if (count >= 0) { 533 count += receivers_count_total; 534 } 535 } 536 result._count = count; 537 } 538 } 539 return result; 540 } 541 542 // ------------------------------------------------------------------ 543 // Add new receiver and sort data by receiver's profile count. 544 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 545 // Add new receiver and sort data by receiver's counts when we have space 546 // for it otherwise replace the less called receiver (less called receiver 547 // is placed to the last array element which is not used). 548 // First array's element contains most called receiver. 549 int i = _limit; 550 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 551 _receiver[i] = _receiver[i-1]; 552 _receiver_count[i] = _receiver_count[i-1]; 553 } 554 _receiver[i] = receiver; 555 _receiver_count[i] = receiver_count; 556 if (_limit < MorphismLimit) _limit++; 557 } 558 559 560 void ciMethod::assert_virtual_call_type_ok(int bci) { 561 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 562 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 563 } 564 565 void ciMethod::assert_call_type_ok(int bci) { 566 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 567 java_code_at_bci(bci) == Bytecodes::_invokespecial || 568 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 569 } 570 571 /** 572 * Check whether profiling provides a type for the argument i to the 573 * call at bci bci 574 * 575 * @param [in]bci bci of the call 576 * @param [in]i argument number 577 * @param [out]type profiled type of argument, NULL if none 578 * @param [out]ptr_kind whether always null, never null or maybe null 579 * @return true if profiling exists 580 * 581 */ 582 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 583 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 584 ciProfileData* data = method_data()->bci_to_data(bci); 585 if (data != NULL) { 586 if (data->is_VirtualCallTypeData()) { 587 assert_virtual_call_type_ok(bci); 588 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 589 if (i >= call->number_of_arguments()) { 590 return false; 591 } 592 type = call->valid_argument_type(i); 593 ptr_kind = call->argument_ptr_kind(i); 594 return true; 595 } else if (data->is_CallTypeData()) { 596 assert_call_type_ok(bci); 597 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 598 if (i >= call->number_of_arguments()) { 599 return false; 600 } 601 type = call->valid_argument_type(i); 602 ptr_kind = call->argument_ptr_kind(i); 603 return true; 604 } 605 } 606 } 607 return false; 608 } 609 610 /** 611 * Check whether profiling provides a type for the return value from 612 * the call at bci bci 613 * 614 * @param [in]bci bci of the call 615 * @param [out]type profiled type of argument, NULL if none 616 * @param [out]ptr_kind whether always null, never null or maybe null 617 * @return true if profiling exists 618 * 619 */ 620 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 621 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 622 ciProfileData* data = method_data()->bci_to_data(bci); 623 if (data != NULL) { 624 if (data->is_VirtualCallTypeData()) { 625 assert_virtual_call_type_ok(bci); 626 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 627 if (call->has_return()) { 628 type = call->valid_return_type(); 629 ptr_kind = call->return_ptr_kind(); 630 return true; 631 } 632 } else if (data->is_CallTypeData()) { 633 assert_call_type_ok(bci); 634 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 635 if (call->has_return()) { 636 type = call->valid_return_type(); 637 ptr_kind = call->return_ptr_kind(); 638 } 639 return true; 640 } 641 } 642 } 643 return false; 644 } 645 646 /** 647 * Check whether profiling provides a type for the parameter i 648 * 649 * @param [in]i parameter number 650 * @param [out]type profiled type of parameter, NULL if none 651 * @param [out]ptr_kind whether always null, never null or maybe null 652 * @return true if profiling exists 653 * 654 */ 655 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 656 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 657 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 658 if (parameters != NULL && i < parameters->number_of_parameters()) { 659 type = parameters->valid_parameter_type(i); 660 ptr_kind = parameters->parameter_ptr_kind(i); 661 return true; 662 } 663 } 664 return false; 665 } 666 667 668 // ------------------------------------------------------------------ 669 // ciMethod::find_monomorphic_target 670 // 671 // Given a certain calling environment, find the monomorphic target 672 // for the call. Return NULL if the call is not monomorphic in 673 // its calling environment, or if there are only abstract methods. 674 // The returned method is never abstract. 675 // Note: If caller uses a non-null result, it must inform dependencies 676 // via assert_unique_concrete_method or assert_leaf_type. 677 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 678 ciInstanceKlass* callee_holder, 679 ciInstanceKlass* actual_recv, 680 bool check_access) { 681 check_is_loaded(); 682 683 if (actual_recv->is_interface()) { 684 // %%% We cannot trust interface types, yet. See bug 6312651. 685 return NULL; 686 } 687 688 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 689 if (root_m == NULL) { 690 // Something went wrong looking up the actual receiver method. 691 return NULL; 692 } 693 assert(!root_m->is_abstract(), "resolve_invoke promise"); 694 695 // Make certain quick checks even if UseCHA is false. 696 697 // Is it private or final? 698 if (root_m->can_be_statically_bound()) { 699 return root_m; 700 } 701 702 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 703 // Easy case. There is no other place to put a method, so don't bother 704 // to go through the VM_ENTRY_MARK and all the rest. 705 return root_m; 706 } 707 708 // Array methods (clone, hashCode, etc.) are always statically bound. 709 // If we were to see an array type here, we'd return root_m. 710 // However, this method processes only ciInstanceKlasses. (See 4962591.) 711 // The inline_native_clone intrinsic narrows Object to T[] properly, 712 // so there is no need to do the same job here. 713 714 if (!UseCHA) return NULL; 715 716 VM_ENTRY_MARK; 717 718 // Disable CHA for default methods for now 719 if (root_m->get_Method()->is_default_method()) { 720 return NULL; 721 } 722 723 methodHandle target; 724 { 725 MutexLocker locker(Compile_lock); 726 Klass* context = actual_recv->get_Klass(); 727 target = Dependencies::find_unique_concrete_method(context, 728 root_m->get_Method()); 729 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 730 } 731 732 #ifndef PRODUCT 733 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 734 tty->print("found a non-root unique target method"); 735 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 736 tty->print(" method = "); 737 target->print_short_name(tty); 738 tty->cr(); 739 } 740 #endif //PRODUCT 741 742 if (target() == NULL) { 743 return NULL; 744 } 745 if (target() == root_m->get_Method()) { 746 return root_m; 747 } 748 if (!root_m->is_public() && 749 !root_m->is_protected()) { 750 // If we are going to reason about inheritance, it's easiest 751 // if the method in question is public, protected, or private. 752 // If the answer is not root_m, it is conservatively correct 753 // to return NULL, even if the CHA encountered irrelevant 754 // methods in other packages. 755 // %%% TO DO: Work out logic for package-private methods 756 // with the same name but different vtable indexes. 757 return NULL; 758 } 759 return CURRENT_THREAD_ENV->get_method(target()); 760 } 761 762 // ------------------------------------------------------------------ 763 // ciMethod::resolve_invoke 764 // 765 // Given a known receiver klass, find the target for the call. 766 // Return NULL if the call has no target or the target is abstract. 767 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 768 check_is_loaded(); 769 VM_ENTRY_MARK; 770 771 Klass* caller_klass = caller->get_Klass(); 772 Klass* recv = exact_receiver->get_Klass(); 773 Klass* resolved = holder()->get_Klass(); 774 Symbol* h_name = name()->get_symbol(); 775 Symbol* h_signature = signature()->get_symbol(); 776 777 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 778 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 779 methodHandle m; 780 // Only do exact lookup if receiver klass has been linked. Otherwise, 781 // the vtable has not been setup, and the LinkResolver will fail. 782 if (recv->is_array_klass() 783 || 784 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 785 if (holder()->is_interface()) { 786 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 787 } else { 788 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info); 789 } 790 } 791 792 if (m.is_null()) { 793 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 794 return NULL; 795 } 796 797 ciMethod* result = this; 798 if (m() != get_Method()) { 799 result = CURRENT_THREAD_ENV->get_method(m()); 800 } 801 802 // Don't return abstract methods because they aren't 803 // optimizable or interesting. 804 if (result->is_abstract()) { 805 return NULL; 806 } else { 807 return result; 808 } 809 } 810 811 // ------------------------------------------------------------------ 812 // ciMethod::resolve_vtable_index 813 // 814 // Given a known receiver klass, find the vtable index for the call. 815 // Return Method::invalid_vtable_index if the vtable_index is unknown. 816 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 817 check_is_loaded(); 818 819 int vtable_index = Method::invalid_vtable_index; 820 // Only do lookup if receiver klass has been linked. Otherwise, 821 // the vtable has not been setup, and the LinkResolver will fail. 822 if (!receiver->is_interface() 823 && (!receiver->is_instance_klass() || 824 receiver->as_instance_klass()->is_linked())) { 825 VM_ENTRY_MARK; 826 827 Klass* caller_klass = caller->get_Klass(); 828 Klass* recv = receiver->get_Klass(); 829 Symbol* h_name = name()->get_symbol(); 830 Symbol* h_signature = signature()->get_symbol(); 831 832 LinkInfo link_info(recv, h_name, h_signature, caller_klass); 833 vtable_index = LinkResolver::resolve_virtual_vtable_index(recv, link_info); 834 if (vtable_index == Method::nonvirtual_vtable_index) { 835 // A statically bound method. Return "no such index". 836 vtable_index = Method::invalid_vtable_index; 837 } 838 } 839 840 return vtable_index; 841 } 842 843 // ------------------------------------------------------------------ 844 // ciMethod::interpreter_call_site_count 845 int ciMethod::interpreter_call_site_count(int bci) { 846 if (method_data() != NULL) { 847 ResourceMark rm; 848 ciProfileData* data = method_data()->bci_to_data(bci); 849 if (data != NULL && data->is_CounterData()) { 850 return scale_count(data->as_CounterData()->count()); 851 } 852 } 853 return -1; // unknown 854 } 855 856 // ------------------------------------------------------------------ 857 // ciMethod::get_field_at_bci 858 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 859 ciBytecodeStream iter(this); 860 iter.reset_to_bci(bci); 861 iter.next(); 862 return iter.get_field(will_link); 863 } 864 865 // ------------------------------------------------------------------ 866 // ciMethod::get_method_at_bci 867 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 868 ciBytecodeStream iter(this); 869 iter.reset_to_bci(bci); 870 iter.next(); 871 return iter.get_method(will_link, declared_signature); 872 } 873 874 // ------------------------------------------------------------------ 875 // Adjust a CounterData count to be commensurate with 876 // interpreter_invocation_count. If the MDO exists for 877 // only 25% of the time the method exists, then the 878 // counts in the MDO should be scaled by 4X, so that 879 // they can be usefully and stably compared against the 880 // invocation counts in methods. 881 int ciMethod::scale_count(int count, float prof_factor) { 882 if (count > 0 && method_data() != NULL) { 883 int counter_life; 884 int method_life = interpreter_invocation_count(); 885 if (TieredCompilation) { 886 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 887 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 888 } else { 889 int current_mileage = method_data()->current_mileage(); 890 int creation_mileage = method_data()->creation_mileage(); 891 counter_life = current_mileage - creation_mileage; 892 } 893 894 // counter_life due to backedge_counter could be > method_life 895 if (counter_life > method_life) 896 counter_life = method_life; 897 if (0 < counter_life && counter_life <= method_life) { 898 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 899 count = (count > 0) ? count : 1; 900 } 901 } 902 return count; 903 } 904 905 906 // ------------------------------------------------------------------ 907 // ciMethod::is_special_get_caller_class_method 908 // 909 bool ciMethod::is_ignored_by_security_stack_walk() const { 910 check_is_loaded(); 911 VM_ENTRY_MARK; 912 return get_Method()->is_ignored_by_security_stack_walk(); 913 } 914 915 916 // ------------------------------------------------------------------ 917 // invokedynamic support 918 919 // ------------------------------------------------------------------ 920 // ciMethod::is_method_handle_intrinsic 921 // 922 // Return true if the method is an instance of the JVM-generated 923 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 924 bool ciMethod::is_method_handle_intrinsic() const { 925 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 926 return (MethodHandles::is_signature_polymorphic(iid) && 927 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 928 } 929 930 // ------------------------------------------------------------------ 931 // ciMethod::is_compiled_lambda_form 932 // 933 // Return true if the method is a generated MethodHandle adapter. 934 // These are built by Java code. 935 bool ciMethod::is_compiled_lambda_form() const { 936 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 937 return iid == vmIntrinsics::_compiledLambdaForm; 938 } 939 940 // ------------------------------------------------------------------ 941 // ciMethod::is_object_initializer 942 // 943 bool ciMethod::is_object_initializer() const { 944 return name() == ciSymbol::object_initializer_name(); 945 } 946 947 // ------------------------------------------------------------------ 948 // ciMethod::has_member_arg 949 // 950 // Return true if the method is a linker intrinsic like _linkToVirtual. 951 // These are built by the JVM. 952 bool ciMethod::has_member_arg() const { 953 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 954 return (MethodHandles::is_signature_polymorphic(iid) && 955 MethodHandles::has_member_arg(iid)); 956 } 957 958 // ------------------------------------------------------------------ 959 // ciMethod::ensure_method_data 960 // 961 // Generate new MethodData* objects at compile time. 962 // Return true if allocation was successful or no MDO is required. 963 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 964 EXCEPTION_CONTEXT; 965 if (is_native() || is_abstract() || h_m()->is_accessor()) { 966 return true; 967 } 968 if (h_m()->method_data() == NULL) { 969 Method::build_interpreter_method_data(h_m, THREAD); 970 if (HAS_PENDING_EXCEPTION) { 971 CLEAR_PENDING_EXCEPTION; 972 } 973 } 974 if (h_m()->method_data() != NULL) { 975 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 976 _method_data->load_data(); 977 return true; 978 } else { 979 _method_data = CURRENT_ENV->get_empty_methodData(); 980 return false; 981 } 982 } 983 984 // public, retroactive version 985 bool ciMethod::ensure_method_data() { 986 bool result = true; 987 if (_method_data == NULL || _method_data->is_empty()) { 988 GUARDED_VM_ENTRY({ 989 result = ensure_method_data(get_Method()); 990 }); 991 } 992 return result; 993 } 994 995 996 // ------------------------------------------------------------------ 997 // ciMethod::method_data 998 // 999 ciMethodData* ciMethod::method_data() { 1000 if (_method_data != NULL) { 1001 return _method_data; 1002 } 1003 VM_ENTRY_MARK; 1004 ciEnv* env = CURRENT_ENV; 1005 Thread* my_thread = JavaThread::current(); 1006 methodHandle h_m(my_thread, get_Method()); 1007 1008 if (h_m()->method_data() != NULL) { 1009 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1010 _method_data->load_data(); 1011 } else { 1012 _method_data = CURRENT_ENV->get_empty_methodData(); 1013 } 1014 return _method_data; 1015 1016 } 1017 1018 // ------------------------------------------------------------------ 1019 // ciMethod::method_data_or_null 1020 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1021 // NULL otherwise. 1022 ciMethodData* ciMethod::method_data_or_null() { 1023 ciMethodData *md = method_data(); 1024 if (md->is_empty()) { 1025 return NULL; 1026 } 1027 return md; 1028 } 1029 1030 // ------------------------------------------------------------------ 1031 // ciMethod::ensure_method_counters 1032 // 1033 MethodCounters* ciMethod::ensure_method_counters() { 1034 check_is_loaded(); 1035 VM_ENTRY_MARK; 1036 methodHandle mh(THREAD, get_Method()); 1037 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1038 return method_counters; 1039 } 1040 1041 // ------------------------------------------------------------------ 1042 // ciMethod::has_option 1043 // 1044 bool ciMethod::has_option(const char* option) { 1045 check_is_loaded(); 1046 VM_ENTRY_MARK; 1047 methodHandle mh(THREAD, get_Method()); 1048 return CompilerOracle::has_option_string(mh, option); 1049 } 1050 1051 // ------------------------------------------------------------------ 1052 // ciMethod::has_option_value 1053 // 1054 bool ciMethod::has_option_value(const char* option, double& value) { 1055 check_is_loaded(); 1056 VM_ENTRY_MARK; 1057 methodHandle mh(THREAD, get_Method()); 1058 return CompilerOracle::has_option_value(mh, option, value); 1059 } 1060 // ------------------------------------------------------------------ 1061 // ciMethod::can_be_compiled 1062 // 1063 // Have previous compilations of this method succeeded? 1064 bool ciMethod::can_be_compiled() { 1065 check_is_loaded(); 1066 ciEnv* env = CURRENT_ENV; 1067 if (is_c1_compile(env->comp_level())) { 1068 return _is_c1_compilable; 1069 } 1070 return _is_c2_compilable; 1071 } 1072 1073 // ------------------------------------------------------------------ 1074 // ciMethod::set_not_compilable 1075 // 1076 // Tell the VM that this method cannot be compiled at all. 1077 void ciMethod::set_not_compilable(const char* reason) { 1078 check_is_loaded(); 1079 VM_ENTRY_MARK; 1080 ciEnv* env = CURRENT_ENV; 1081 if (is_c1_compile(env->comp_level())) { 1082 _is_c1_compilable = false; 1083 } else { 1084 _is_c2_compilable = false; 1085 } 1086 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1087 } 1088 1089 // ------------------------------------------------------------------ 1090 // ciMethod::can_be_osr_compiled 1091 // 1092 // Have previous compilations of this method succeeded? 1093 // 1094 // Implementation note: the VM does not currently keep track 1095 // of failed OSR compilations per bci. The entry_bci parameter 1096 // is currently unused. 1097 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1098 check_is_loaded(); 1099 VM_ENTRY_MARK; 1100 ciEnv* env = CURRENT_ENV; 1101 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1102 } 1103 1104 // ------------------------------------------------------------------ 1105 // ciMethod::has_compiled_code 1106 bool ciMethod::has_compiled_code() { 1107 return instructions_size() > 0; 1108 } 1109 1110 int ciMethod::comp_level() { 1111 check_is_loaded(); 1112 VM_ENTRY_MARK; 1113 CompiledMethod* nm = get_Method()->code(); 1114 if (nm != NULL) return nm->comp_level(); 1115 return 0; 1116 } 1117 1118 int ciMethod::highest_osr_comp_level() { 1119 check_is_loaded(); 1120 VM_ENTRY_MARK; 1121 return get_Method()->highest_osr_comp_level(); 1122 } 1123 1124 // ------------------------------------------------------------------ 1125 // ciMethod::code_size_for_inlining 1126 // 1127 // Code size for inlining decisions. This method returns a code 1128 // size of 1 for methods which has the ForceInline annotation. 1129 int ciMethod::code_size_for_inlining() { 1130 check_is_loaded(); 1131 if (get_Method()->force_inline()) { 1132 return 1; 1133 } 1134 return code_size(); 1135 } 1136 1137 // ------------------------------------------------------------------ 1138 // ciMethod::instructions_size 1139 // 1140 // This is a rough metric for "fat" methods, compared before inlining 1141 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1142 // junk like exception handler, stubs, and constant table, which are 1143 // not highly relevant to an inlined method. So we use the more 1144 // specific accessor nmethod::insts_size. 1145 int ciMethod::instructions_size() { 1146 if (_instructions_size == -1) { 1147 GUARDED_VM_ENTRY( 1148 CompiledMethod* code = get_Method()->code(); 1149 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1150 _instructions_size = code->insts_end() - code->verified_entry_point(); 1151 } else { 1152 _instructions_size = 0; 1153 } 1154 ); 1155 } 1156 return _instructions_size; 1157 } 1158 1159 // ------------------------------------------------------------------ 1160 // ciMethod::log_nmethod_identity 1161 void ciMethod::log_nmethod_identity(xmlStream* log) { 1162 GUARDED_VM_ENTRY( 1163 CompiledMethod* code = get_Method()->code(); 1164 if (code != NULL) { 1165 code->log_identity(log); 1166 } 1167 ) 1168 } 1169 1170 // ------------------------------------------------------------------ 1171 // ciMethod::is_not_reached 1172 bool ciMethod::is_not_reached(int bci) { 1173 check_is_loaded(); 1174 VM_ENTRY_MARK; 1175 return Interpreter::is_not_reached( 1176 methodHandle(THREAD, get_Method()), bci); 1177 } 1178 1179 // ------------------------------------------------------------------ 1180 // ciMethod::was_never_executed 1181 bool ciMethod::was_executed_more_than(int times) { 1182 VM_ENTRY_MARK; 1183 return get_Method()->was_executed_more_than(times); 1184 } 1185 1186 // ------------------------------------------------------------------ 1187 // ciMethod::has_unloaded_classes_in_signature 1188 bool ciMethod::has_unloaded_classes_in_signature() { 1189 VM_ENTRY_MARK; 1190 { 1191 EXCEPTION_MARK; 1192 methodHandle m(THREAD, get_Method()); 1193 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1194 if( HAS_PENDING_EXCEPTION ) { 1195 CLEAR_PENDING_EXCEPTION; 1196 return true; // Declare that we may have unloaded classes 1197 } 1198 return has_unloaded; 1199 } 1200 } 1201 1202 // ------------------------------------------------------------------ 1203 // ciMethod::is_klass_loaded 1204 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1205 VM_ENTRY_MARK; 1206 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1207 } 1208 1209 // ------------------------------------------------------------------ 1210 // ciMethod::check_call 1211 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1212 // This method is used only in C2 from InlineTree::ok_to_inline, 1213 // and is only used under -Xcomp or -XX:CompileTheWorld. 1214 // It appears to fail when applied to an invokeinterface call site. 1215 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1216 VM_ENTRY_MARK; 1217 { 1218 EXCEPTION_MARK; 1219 HandleMark hm(THREAD); 1220 constantPoolHandle pool (THREAD, get_Method()->constants()); 1221 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1222 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1223 if (HAS_PENDING_EXCEPTION) { 1224 CLEAR_PENDING_EXCEPTION; 1225 return false; 1226 } else { 1227 return (spec_method->is_static() == is_static); 1228 } 1229 } 1230 return false; 1231 } 1232 1233 // ------------------------------------------------------------------ 1234 // ciMethod::profile_aging 1235 // 1236 // Should the method be compiled with an age counter? 1237 bool ciMethod::profile_aging() const { 1238 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1239 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1240 } 1241 // ------------------------------------------------------------------ 1242 // ciMethod::print_codes 1243 // 1244 // Print the bytecodes for this method. 1245 void ciMethod::print_codes_on(outputStream* st) { 1246 check_is_loaded(); 1247 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1248 } 1249 1250 1251 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1252 check_is_loaded(); \ 1253 VM_ENTRY_MARK; \ 1254 return get_Method()->flag_accessor(); \ 1255 } 1256 1257 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1258 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1259 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1260 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1261 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1262 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1263 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1264 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1265 1266 bool ciMethod::is_boxing_method() const { 1267 if (holder()->is_box_klass()) { 1268 switch (intrinsic_id()) { 1269 case vmIntrinsics::_Boolean_valueOf: 1270 case vmIntrinsics::_Byte_valueOf: 1271 case vmIntrinsics::_Character_valueOf: 1272 case vmIntrinsics::_Short_valueOf: 1273 case vmIntrinsics::_Integer_valueOf: 1274 case vmIntrinsics::_Long_valueOf: 1275 case vmIntrinsics::_Float_valueOf: 1276 case vmIntrinsics::_Double_valueOf: 1277 return true; 1278 default: 1279 return false; 1280 } 1281 } 1282 return false; 1283 } 1284 1285 bool ciMethod::is_unboxing_method() const { 1286 if (holder()->is_box_klass()) { 1287 switch (intrinsic_id()) { 1288 case vmIntrinsics::_booleanValue: 1289 case vmIntrinsics::_byteValue: 1290 case vmIntrinsics::_charValue: 1291 case vmIntrinsics::_shortValue: 1292 case vmIntrinsics::_intValue: 1293 case vmIntrinsics::_longValue: 1294 case vmIntrinsics::_floatValue: 1295 case vmIntrinsics::_doubleValue: 1296 return true; 1297 default: 1298 return false; 1299 } 1300 } 1301 return false; 1302 } 1303 1304 BCEscapeAnalyzer *ciMethod::get_bcea() { 1305 #ifdef COMPILER2 1306 if (_bcea == NULL) { 1307 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1308 } 1309 return _bcea; 1310 #else // COMPILER2 1311 ShouldNotReachHere(); 1312 return NULL; 1313 #endif // COMPILER2 1314 } 1315 1316 ciMethodBlocks *ciMethod::get_method_blocks() { 1317 Arena *arena = CURRENT_ENV->arena(); 1318 if (_method_blocks == NULL) { 1319 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1320 } 1321 return _method_blocks; 1322 } 1323 1324 #undef FETCH_FLAG_FROM_VM 1325 1326 void ciMethod::dump_name_as_ascii(outputStream* st) { 1327 Method* method = get_Method(); 1328 st->print("%s %s %s", 1329 method->klass_name()->as_quoted_ascii(), 1330 method->name()->as_quoted_ascii(), 1331 method->signature()->as_quoted_ascii()); 1332 } 1333 1334 void ciMethod::dump_replay_data(outputStream* st) { 1335 ResourceMark rm; 1336 Method* method = get_Method(); 1337 MethodCounters* mcs = method->method_counters(); 1338 st->print("ciMethod "); 1339 dump_name_as_ascii(st); 1340 st->print_cr(" %d %d %d %d %d", 1341 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1342 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1343 interpreter_invocation_count(), 1344 interpreter_throwout_count(), 1345 _instructions_size); 1346 } 1347 1348 // ------------------------------------------------------------------ 1349 // ciMethod::print_codes 1350 // 1351 // Print a range of the bytecodes for this method. 1352 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1353 check_is_loaded(); 1354 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1355 } 1356 1357 // ------------------------------------------------------------------ 1358 // ciMethod::print_name 1359 // 1360 // Print the name of this method, including signature and some flags. 1361 void ciMethod::print_name(outputStream* st) { 1362 check_is_loaded(); 1363 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1364 } 1365 1366 // ------------------------------------------------------------------ 1367 // ciMethod::print_short_name 1368 // 1369 // Print the name of this method, without signature. 1370 void ciMethod::print_short_name(outputStream* st) { 1371 if (is_loaded()) { 1372 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1373 } else { 1374 // Fall back if method is not loaded. 1375 holder()->print_name_on(st); 1376 st->print("::"); 1377 name()->print_symbol_on(st); 1378 if (WizardMode) 1379 signature()->as_symbol()->print_symbol_on(st); 1380 } 1381 } 1382 1383 // ------------------------------------------------------------------ 1384 // ciMethod::print_impl 1385 // 1386 // Implementation of the print method. 1387 void ciMethod::print_impl(outputStream* st) { 1388 ciMetadata::print_impl(st); 1389 st->print(" name="); 1390 name()->print_symbol_on(st); 1391 st->print(" holder="); 1392 holder()->print_name_on(st); 1393 st->print(" signature="); 1394 signature()->as_symbol()->print_symbol_on(st); 1395 if (is_loaded()) { 1396 st->print(" loaded=true"); 1397 st->print(" arg_size=%d", arg_size()); 1398 st->print(" flags="); 1399 flags().print_member_flags(st); 1400 } else { 1401 st->print(" loaded=false"); 1402 } 1403 } 1404 1405 // ------------------------------------------------------------------ 1406 1407 static BasicType erase_to_word_type(BasicType bt) { 1408 if (is_subword_type(bt)) return T_INT; 1409 if (bt == T_ARRAY) return T_OBJECT; 1410 return bt; 1411 } 1412 1413 static bool basic_types_match(ciType* t1, ciType* t2) { 1414 if (t1 == t2) return true; 1415 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1416 } 1417 1418 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1419 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1420 !resolved_method->is_method_handle_intrinsic(); 1421 1422 if (!invoke_through_mh_intrinsic) { 1423 // Method name & descriptor should stay the same. 1424 // Signatures may reference unloaded types and thus they may be not strictly equal. 1425 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1426 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1427 1428 return (declared_method->name()->equals(resolved_method->name())) && 1429 (declared_signature->equals(resolved_signature)); 1430 } 1431 1432 ciMethod* linker = declared_method; 1433 ciMethod* target = resolved_method; 1434 // Linkers have appendix argument which is not passed to callee. 1435 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1436 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1437 return false; // argument slot count mismatch 1438 } 1439 1440 ciSignature* linker_sig = linker->signature(); 1441 ciSignature* target_sig = target->signature(); 1442 1443 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1444 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1445 return false; // argument count mismatch 1446 } 1447 1448 int sbase = 0, rbase = 0; 1449 switch (linker->intrinsic_id()) { 1450 case vmIntrinsics::_linkToVirtual: 1451 case vmIntrinsics::_linkToInterface: 1452 case vmIntrinsics::_linkToSpecial: { 1453 if (target->is_static()) { 1454 return false; 1455 } 1456 if (linker_sig->type_at(0)->is_primitive_type()) { 1457 return false; // receiver should be an oop 1458 } 1459 sbase = 1; // skip receiver 1460 break; 1461 } 1462 case vmIntrinsics::_linkToStatic: { 1463 if (!target->is_static()) { 1464 return false; 1465 } 1466 break; 1467 } 1468 case vmIntrinsics::_invokeBasic: { 1469 if (target->is_static()) { 1470 if (target_sig->type_at(0)->is_primitive_type()) { 1471 return false; // receiver should be an oop 1472 } 1473 rbase = 1; // skip receiver 1474 } 1475 break; 1476 } 1477 default: 1478 break; 1479 } 1480 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1481 int arg_count = target_sig->count() - rbase; 1482 for (int i = 0; i < arg_count; i++) { 1483 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1484 return false; 1485 } 1486 } 1487 // Only check the return type if the symbolic info has non-void return type. 1488 // I.e. the return value of the resolved method can be dropped. 1489 if (!linker->return_type()->is_void() && 1490 !basic_types_match(linker->return_type(), target->return_type())) { 1491 return false; 1492 } 1493 return true; // no mismatch found 1494 } 1495 1496 // ------------------------------------------------------------------