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.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/oop.inline.hpp" 46 #include "prims/nativeLookup.hpp" 47 #include "runtime/deoptimization.hpp" 48 #include "utilities/bitMap.inline.hpp" 49 #include "utilities/xmlstream.hpp" 50 #include "trace/tracing.hpp" 51 #ifdef COMPILER2 52 #include "ci/bcEscapeAnalyzer.hpp" 53 #include "ci/ciTypeFlow.hpp" 54 #include "oops/method.hpp" 55 #endif 56 #ifdef SHARK 57 #include "ci/ciTypeFlow.hpp" 58 #include "oops/method.hpp" 59 #endif 60 61 // ciMethod 62 // 63 // This class represents a Method* in the HotSpot virtual 64 // machine. 65 66 67 // ------------------------------------------------------------------ 68 // ciMethod::ciMethod 69 // 70 // Loaded method. 71 ciMethod::ciMethod(const methodHandle& h_m, ciInstanceKlass* holder) : 72 ciMetadata(h_m()), 73 _holder(holder) 74 { 75 assert(h_m() != NULL, "no null method"); 76 77 if (LogTouchedMethods) { 78 h_m()->log_touched(Thread::current()); 79 } 80 // These fields are always filled in in loaded methods. 81 _flags = ciFlags(h_m()->access_flags()); 82 83 // Easy to compute, so fill them in now. 84 _max_stack = h_m()->max_stack(); 85 _max_locals = h_m()->max_locals(); 86 _code_size = h_m()->code_size(); 87 _intrinsic_id = h_m()->intrinsic_id(); 88 _handler_count = h_m()->exception_table_length(); 89 _size_of_parameters = h_m()->size_of_parameters(); 90 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 91 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 92 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 93 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 94 _has_reserved_stack_access = h_m()->has_reserved_stack_access(); 95 // Lazy fields, filled in on demand. Require allocation. 96 _code = NULL; 97 _exception_handlers = NULL; 98 _liveness = NULL; 99 _method_blocks = NULL; 100 #if defined(COMPILER2) || defined(SHARK) 101 _flow = NULL; 102 _bcea = NULL; 103 #endif // COMPILER2 || SHARK 104 105 ciEnv *env = CURRENT_ENV; 106 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 107 // 6328518 check hotswap conditions under the right lock. 108 MutexLocker locker(Compile_lock); 109 if (Dependencies::check_evol_method(h_m()) != NULL) { 110 _is_c1_compilable = false; 111 _is_c2_compilable = false; 112 } 113 } else { 114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 115 } 116 117 if (h_m()->method_holder()->is_linked()) { 118 _can_be_statically_bound = h_m()->can_be_statically_bound(); 119 } else { 120 // Have to use a conservative value in this case. 121 _can_be_statically_bound = false; 122 } 123 124 // Adjust the definition of this condition to be more useful: 125 // %%% take these conditions into account in vtable generation 126 if (!_can_be_statically_bound && h_m()->is_private()) 127 _can_be_statically_bound = true; 128 if (_can_be_statically_bound && h_m()->is_abstract()) 129 _can_be_statically_bound = false; 130 131 // generating _signature may allow GC and therefore move m. 132 // These fields are always filled in. 133 _name = env->get_symbol(h_m()->name()); 134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 135 constantPoolHandle cpool = h_m()->constants(); 136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 137 _method_data = NULL; 138 _nmethod_age = h_m()->nmethod_age(); 139 // Take a snapshot of these values, so they will be commensurate with the MDO. 140 if (ProfileInterpreter || TieredCompilation) { 141 int invcnt = h_m()->interpreter_invocation_count(); 142 // if the value overflowed report it as max int 143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 144 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 145 } else { 146 _interpreter_invocation_count = 0; 147 _interpreter_throwout_count = 0; 148 } 149 if (_interpreter_invocation_count == 0) 150 _interpreter_invocation_count = 1; 151 _instructions_size = -1; 152 #ifdef ASSERT 153 if (ReplayCompiles) { 154 ciReplay::initialize(this); 155 } 156 #endif 157 } 158 159 160 // ------------------------------------------------------------------ 161 // ciMethod::ciMethod 162 // 163 // Unloaded method. 164 ciMethod::ciMethod(ciInstanceKlass* holder, 165 ciSymbol* name, 166 ciSymbol* signature, 167 ciInstanceKlass* accessor) : 168 ciMetadata((Metadata*)NULL), 169 _name( name), 170 _holder( holder), 171 _intrinsic_id( vmIntrinsics::_none), 172 _liveness( NULL), 173 _can_be_statically_bound(false), 174 _method_blocks( NULL), 175 _method_data( NULL) 176 #if defined(COMPILER2) || defined(SHARK) 177 , 178 _flow( NULL), 179 _bcea( NULL), 180 _instructions_size(-1) 181 #endif // COMPILER2 || SHARK 182 { 183 // Usually holder and accessor are the same type but in some cases 184 // the holder has the wrong class loader (e.g. invokedynamic call 185 // sites) so we pass the accessor. 186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 187 } 188 189 190 // ------------------------------------------------------------------ 191 // ciMethod::load_code 192 // 193 // Load the bytecodes and exception handler table for this method. 194 void ciMethod::load_code() { 195 VM_ENTRY_MARK; 196 assert(is_loaded(), "only loaded methods have code"); 197 198 Method* me = get_Method(); 199 Arena* arena = CURRENT_THREAD_ENV->arena(); 200 201 // Load the bytecodes. 202 _code = (address)arena->Amalloc(code_size()); 203 memcpy(_code, me->code_base(), code_size()); 204 205 #if INCLUDE_JVMTI 206 // Revert any breakpoint bytecodes in ci's copy 207 if (me->number_of_breakpoints() > 0) { 208 BreakpointInfo* bp = me->method_holder()->breakpoints(); 209 for (; bp != NULL; bp = bp->next()) { 210 if (bp->match(me)) { 211 code_at_put(bp->bci(), bp->orig_bytecode()); 212 } 213 } 214 } 215 #endif 216 217 // And load the exception table. 218 ExceptionTable exc_table(me); 219 220 // Allocate one extra spot in our list of exceptions. This 221 // last entry will be used to represent the possibility that 222 // an exception escapes the method. See ciExceptionHandlerStream 223 // for details. 224 _exception_handlers = 225 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 226 * (_handler_count + 1)); 227 if (_handler_count > 0) { 228 for (int i=0; i<_handler_count; i++) { 229 _exception_handlers[i] = new (arena) ciExceptionHandler( 230 holder(), 231 /* start */ exc_table.start_pc(i), 232 /* limit */ exc_table.end_pc(i), 233 /* goto pc */ exc_table.handler_pc(i), 234 /* cp index */ exc_table.catch_type_index(i)); 235 } 236 } 237 238 // Put an entry at the end of our list to represent the possibility 239 // of exceptional exit. 240 _exception_handlers[_handler_count] = 241 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 242 243 if (CIPrintMethodCodes) { 244 print_codes(); 245 } 246 } 247 248 249 // ------------------------------------------------------------------ 250 // ciMethod::has_linenumber_table 251 // 252 // length unknown until decompression 253 bool ciMethod::has_linenumber_table() const { 254 check_is_loaded(); 255 VM_ENTRY_MARK; 256 return get_Method()->has_linenumber_table(); 257 } 258 259 260 // ------------------------------------------------------------------ 261 // ciMethod::compressed_linenumber_table 262 u_char* ciMethod::compressed_linenumber_table() const { 263 check_is_loaded(); 264 VM_ENTRY_MARK; 265 return get_Method()->compressed_linenumber_table(); 266 } 267 268 269 // ------------------------------------------------------------------ 270 // ciMethod::line_number_from_bci 271 int ciMethod::line_number_from_bci(int bci) const { 272 check_is_loaded(); 273 VM_ENTRY_MARK; 274 return get_Method()->line_number_from_bci(bci); 275 } 276 277 278 // ------------------------------------------------------------------ 279 // ciMethod::vtable_index 280 // 281 // Get the position of this method's entry in the vtable, if any. 282 int ciMethod::vtable_index() { 283 check_is_loaded(); 284 assert(holder()->is_linked(), "must be linked"); 285 VM_ENTRY_MARK; 286 return get_Method()->vtable_index(); 287 } 288 289 290 #ifdef SHARK 291 // ------------------------------------------------------------------ 292 // ciMethod::itable_index 293 // 294 // Get the position of this method's entry in the itable, if any. 295 int ciMethod::itable_index() { 296 check_is_loaded(); 297 assert(holder()->is_linked(), "must be linked"); 298 VM_ENTRY_MARK; 299 Method* m = get_Method(); 300 if (!m->has_itable_index()) 301 return Method::nonvirtual_vtable_index; 302 return m->itable_index(); 303 } 304 #endif // SHARK 305 306 307 // ------------------------------------------------------------------ 308 // ciMethod::native_entry 309 // 310 // Get the address of this method's native code, if any. 311 address ciMethod::native_entry() { 312 check_is_loaded(); 313 assert(flags().is_native(), "must be native method"); 314 VM_ENTRY_MARK; 315 Method* method = get_Method(); 316 address entry = method->native_function(); 317 assert(entry != NULL, "must be valid entry point"); 318 return entry; 319 } 320 321 322 // ------------------------------------------------------------------ 323 // ciMethod::interpreter_entry 324 // 325 // Get the entry point for running this method in the interpreter. 326 address ciMethod::interpreter_entry() { 327 check_is_loaded(); 328 VM_ENTRY_MARK; 329 methodHandle mh(THREAD, get_Method()); 330 return Interpreter::entry_for_method(mh); 331 } 332 333 334 // ------------------------------------------------------------------ 335 // ciMethod::uses_balanced_monitors 336 // 337 // Does this method use monitors in a strict stack-disciplined manner? 338 bool ciMethod::has_balanced_monitors() { 339 check_is_loaded(); 340 if (_balanced_monitors) return true; 341 342 // Analyze the method to see if monitors are used properly. 343 VM_ENTRY_MARK; 344 methodHandle method(THREAD, get_Method()); 345 assert(method->has_monitor_bytecodes(), "should have checked this"); 346 347 // Check to see if a previous compilation computed the 348 // monitor-matching analysis. 349 if (method->guaranteed_monitor_matching()) { 350 _balanced_monitors = true; 351 return true; 352 } 353 354 { 355 EXCEPTION_MARK; 356 ResourceMark rm(THREAD); 357 GeneratePairingInfo gpi(method); 358 gpi.compute_map(CATCH); 359 if (!gpi.monitor_safe()) { 360 return false; 361 } 362 method->set_guaranteed_monitor_matching(); 363 _balanced_monitors = true; 364 } 365 return true; 366 } 367 368 369 // ------------------------------------------------------------------ 370 // ciMethod::get_flow_analysis 371 ciTypeFlow* ciMethod::get_flow_analysis() { 372 #if defined(COMPILER2) || defined(SHARK) 373 if (_flow == NULL) { 374 ciEnv* env = CURRENT_ENV; 375 _flow = new (env->arena()) ciTypeFlow(env, this); 376 _flow->do_flow(); 377 } 378 return _flow; 379 #else // COMPILER2 || SHARK 380 ShouldNotReachHere(); 381 return NULL; 382 #endif // COMPILER2 || SHARK 383 } 384 385 386 // ------------------------------------------------------------------ 387 // ciMethod::get_osr_flow_analysis 388 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 389 #if defined(COMPILER2) || defined(SHARK) 390 // OSR entry points are always place after a call bytecode of some sort 391 assert(osr_bci >= 0, "must supply valid OSR entry point"); 392 ciEnv* env = CURRENT_ENV; 393 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 394 flow->do_flow(); 395 return flow; 396 #else // COMPILER2 || SHARK 397 ShouldNotReachHere(); 398 return NULL; 399 #endif // COMPILER2 || SHARK 400 } 401 402 // ------------------------------------------------------------------ 403 // ciMethod::raw_liveness_at_bci 404 // 405 // Which local variables are live at a specific bci? 406 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 407 check_is_loaded(); 408 if (_liveness == NULL) { 409 // Create the liveness analyzer. 410 Arena* arena = CURRENT_ENV->arena(); 411 _liveness = new (arena) MethodLiveness(arena, this); 412 _liveness->compute_liveness(); 413 } 414 return _liveness->get_liveness_at(bci); 415 } 416 417 // ------------------------------------------------------------------ 418 // ciMethod::liveness_at_bci 419 // 420 // Which local variables are live at a specific bci? When debugging 421 // will return true for all locals in some cases to improve debug 422 // information. 423 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 424 MethodLivenessResult result = raw_liveness_at_bci(bci); 425 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { 426 // Keep all locals live for the user's edification and amusement. 427 result.at_put_range(0, result.size(), true); 428 } 429 return result; 430 } 431 432 // ciMethod::live_local_oops_at_bci 433 // 434 // find all the live oops in the locals array for a particular bci 435 // Compute what the interpreter believes by using the interpreter 436 // oopmap generator. This is used as a double check during osr to 437 // guard against conservative result from MethodLiveness making us 438 // think a dead oop is live. MethodLiveness is conservative in the 439 // sense that it may consider locals to be live which cannot be live, 440 // like in the case where a local could contain an oop or a primitive 441 // along different paths. In that case the local must be dead when 442 // those paths merge. Since the interpreter's viewpoint is used when 443 // gc'ing an interpreter frame we need to use its viewpoint during 444 // OSR when loading the locals. 445 446 ResourceBitMap ciMethod::live_local_oops_at_bci(int bci) { 447 VM_ENTRY_MARK; 448 InterpreterOopMap mask; 449 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 450 int mask_size = max_locals(); 451 ResourceBitMap result(mask_size); 452 int i; 453 for (i = 0; i < mask_size ; i++ ) { 454 if (mask.is_oop(i)) result.set_bit(i); 455 } 456 return result; 457 } 458 459 460 #ifdef COMPILER1 461 // ------------------------------------------------------------------ 462 // ciMethod::bci_block_start 463 // 464 // Marks all bcis where a new basic block starts 465 const BitMap& ciMethod::bci_block_start() { 466 check_is_loaded(); 467 if (_liveness == NULL) { 468 // Create the liveness analyzer. 469 Arena* arena = CURRENT_ENV->arena(); 470 _liveness = new (arena) MethodLiveness(arena, this); 471 _liveness->compute_liveness(); 472 } 473 474 return _liveness->get_bci_block_start(); 475 } 476 #endif // COMPILER1 477 478 479 // ------------------------------------------------------------------ 480 // ciMethod::call_profile_at_bci 481 // 482 // Get the ciCallProfile for the invocation of this method. 483 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 484 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 485 ResourceMark rm; 486 ciCallProfile result; 487 if (method_data() != NULL && method_data()->is_mature()) { 488 ciProfileData* data = method_data()->bci_to_data(bci); 489 if (data != NULL && data->is_CounterData()) { 490 // Every profiled call site has a counter. 491 int count = data->as_CounterData()->count(); 492 493 if (!data->is_ReceiverTypeData()) { 494 result._receiver_count[0] = 0; // that's a definite zero 495 } else { // ReceiverTypeData is a subclass of CounterData 496 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 497 // In addition, virtual call sites have receiver type information 498 int receivers_count_total = 0; 499 int morphism = 0; 500 // Precompute morphism for the possible fixup 501 for (uint i = 0; i < call->row_limit(); i++) { 502 ciKlass* receiver = call->receiver(i); 503 if (receiver == NULL) continue; 504 morphism++; 505 } 506 int epsilon = 0; 507 if (TieredCompilation) { 508 // For a call, it is assumed that either the type of the receiver(s) 509 // is recorded or an associated counter is incremented, but not both. With 510 // tiered compilation, however, both can happen due to the interpreter and 511 // C1 profiling invocations differently. Address that inconsistency here. 512 if (morphism == 1 && count > 0) { 513 epsilon = count; 514 count = 0; 515 } 516 } 517 for (uint i = 0; i < call->row_limit(); i++) { 518 ciKlass* receiver = call->receiver(i); 519 if (receiver == NULL) continue; 520 int rcount = call->receiver_count(i) + epsilon; 521 if (rcount == 0) rcount = 1; // Should be valid value 522 receivers_count_total += rcount; 523 // Add the receiver to result data. 524 result.add_receiver(receiver, rcount); 525 // If we extend profiling to record methods, 526 // we will set result._method also. 527 } 528 // Determine call site's morphism. 529 // The call site count is 0 with known morphism (only 1 or 2 receivers) 530 // or < 0 in the case of a type check failure for checkcast, aastore, instanceof. 531 // The call site count is > 0 in the case of a polymorphic virtual call. 532 if (morphism > 0 && morphism == result._limit) { 533 // The morphism <= MorphismLimit. 534 if ((morphism < ciCallProfile::MorphismLimit) || 535 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 536 #ifdef ASSERT 537 if (count > 0) { 538 this->print_short_name(tty); 539 tty->print_cr(" @ bci:%d", bci); 540 this->print_codes(); 541 assert(false, "this call site should not be polymorphic"); 542 } 543 #endif 544 result._morphism = morphism; 545 } 546 } 547 // Make the count consistent if this is a call profile. If count is 548 // zero or less, presume that this is a typecheck profile and 549 // do nothing. Otherwise, increase count to be the sum of all 550 // receiver's counts. 551 if (count >= 0) { 552 count += receivers_count_total; 553 } 554 } 555 result._count = count; 556 } 557 } 558 return result; 559 } 560 561 // ------------------------------------------------------------------ 562 // Add new receiver and sort data by receiver's profile count. 563 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 564 // Add new receiver and sort data by receiver's counts when we have space 565 // for it otherwise replace the less called receiver (less called receiver 566 // is placed to the last array element which is not used). 567 // First array's element contains most called receiver. 568 int i = _limit; 569 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 570 _receiver[i] = _receiver[i-1]; 571 _receiver_count[i] = _receiver_count[i-1]; 572 } 573 _receiver[i] = receiver; 574 _receiver_count[i] = receiver_count; 575 if (_limit < MorphismLimit) _limit++; 576 } 577 578 579 void ciMethod::assert_virtual_call_type_ok(int bci) { 580 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 581 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 582 } 583 584 void ciMethod::assert_call_type_ok(int bci) { 585 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 586 java_code_at_bci(bci) == Bytecodes::_invokespecial || 587 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 588 } 589 590 /** 591 * Check whether profiling provides a type for the argument i to the 592 * call at bci bci 593 * 594 * @param [in]bci bci of the call 595 * @param [in]i argument number 596 * @param [out]type profiled type of argument, NULL if none 597 * @param [out]ptr_kind whether always null, never null or maybe null 598 * @return true if profiling exists 599 * 600 */ 601 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 602 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 603 ciProfileData* data = method_data()->bci_to_data(bci); 604 if (data != NULL) { 605 if (data->is_VirtualCallTypeData()) { 606 assert_virtual_call_type_ok(bci); 607 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 608 if (i >= call->number_of_arguments()) { 609 return false; 610 } 611 type = call->valid_argument_type(i); 612 ptr_kind = call->argument_ptr_kind(i); 613 return true; 614 } else if (data->is_CallTypeData()) { 615 assert_call_type_ok(bci); 616 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 617 if (i >= call->number_of_arguments()) { 618 return false; 619 } 620 type = call->valid_argument_type(i); 621 ptr_kind = call->argument_ptr_kind(i); 622 return true; 623 } 624 } 625 } 626 return false; 627 } 628 629 /** 630 * Check whether profiling provides a type for the return value from 631 * the call at bci bci 632 * 633 * @param [in]bci bci of the call 634 * @param [out]type profiled type of argument, NULL if none 635 * @param [out]ptr_kind whether always null, never null or maybe null 636 * @return true if profiling exists 637 * 638 */ 639 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, ProfilePtrKind& ptr_kind) { 640 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 641 ciProfileData* data = method_data()->bci_to_data(bci); 642 if (data != NULL) { 643 if (data->is_VirtualCallTypeData()) { 644 assert_virtual_call_type_ok(bci); 645 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 646 if (call->has_return()) { 647 type = call->valid_return_type(); 648 ptr_kind = call->return_ptr_kind(); 649 return true; 650 } 651 } else if (data->is_CallTypeData()) { 652 assert_call_type_ok(bci); 653 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 654 if (call->has_return()) { 655 type = call->valid_return_type(); 656 ptr_kind = call->return_ptr_kind(); 657 } 658 return true; 659 } 660 } 661 } 662 return false; 663 } 664 665 /** 666 * Check whether profiling provides a type for the parameter i 667 * 668 * @param [in]i parameter number 669 * @param [out]type profiled type of parameter, NULL if none 670 * @param [out]ptr_kind whether always null, never null or maybe null 671 * @return true if profiling exists 672 * 673 */ 674 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, ProfilePtrKind& ptr_kind) { 675 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 676 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 677 if (parameters != NULL && i < parameters->number_of_parameters()) { 678 type = parameters->valid_parameter_type(i); 679 ptr_kind = parameters->parameter_ptr_kind(i); 680 return true; 681 } 682 } 683 return false; 684 } 685 686 687 // ------------------------------------------------------------------ 688 // ciMethod::find_monomorphic_target 689 // 690 // Given a certain calling environment, find the monomorphic target 691 // for the call. Return NULL if the call is not monomorphic in 692 // its calling environment, or if there are only abstract methods. 693 // The returned method is never abstract. 694 // Note: If caller uses a non-null result, it must inform dependencies 695 // via assert_unique_concrete_method or assert_leaf_type. 696 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 697 ciInstanceKlass* callee_holder, 698 ciInstanceKlass* actual_recv, 699 bool check_access) { 700 check_is_loaded(); 701 702 if (actual_recv->is_interface()) { 703 // %%% We cannot trust interface types, yet. See bug 6312651. 704 return NULL; 705 } 706 707 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 708 if (root_m == NULL) { 709 // Something went wrong looking up the actual receiver method. 710 return NULL; 711 } 712 assert(!root_m->is_abstract(), "resolve_invoke promise"); 713 714 // Make certain quick checks even if UseCHA is false. 715 716 // Is it private or final? 717 if (root_m->can_be_statically_bound()) { 718 return root_m; 719 } 720 721 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 722 // Easy case. There is no other place to put a method, so don't bother 723 // to go through the VM_ENTRY_MARK and all the rest. 724 return root_m; 725 } 726 727 // Array methods (clone, hashCode, etc.) are always statically bound. 728 // If we were to see an array type here, we'd return root_m. 729 // However, this method processes only ciInstanceKlasses. (See 4962591.) 730 // The inline_native_clone intrinsic narrows Object to T[] properly, 731 // so there is no need to do the same job here. 732 733 if (!UseCHA) return NULL; 734 735 VM_ENTRY_MARK; 736 737 // Disable CHA for default methods for now 738 if (root_m->get_Method()->is_default_method()) { 739 return NULL; 740 } 741 742 methodHandle target; 743 { 744 MutexLocker locker(Compile_lock); 745 Klass* context = actual_recv->get_Klass(); 746 target = Dependencies::find_unique_concrete_method(context, 747 root_m->get_Method()); 748 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 749 } 750 751 #ifndef PRODUCT 752 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 753 tty->print("found a non-root unique target method"); 754 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 755 tty->print(" method = "); 756 target->print_short_name(tty); 757 tty->cr(); 758 } 759 #endif //PRODUCT 760 761 if (target() == NULL) { 762 return NULL; 763 } 764 if (target() == root_m->get_Method()) { 765 return root_m; 766 } 767 if (!root_m->is_public() && 768 !root_m->is_protected()) { 769 // If we are going to reason about inheritance, it's easiest 770 // if the method in question is public, protected, or private. 771 // If the answer is not root_m, it is conservatively correct 772 // to return NULL, even if the CHA encountered irrelevant 773 // methods in other packages. 774 // %%% TO DO: Work out logic for package-private methods 775 // with the same name but different vtable indexes. 776 return NULL; 777 } 778 return CURRENT_THREAD_ENV->get_method(target()); 779 } 780 781 // ------------------------------------------------------------------ 782 // ciMethod::resolve_invoke 783 // 784 // Given a known receiver klass, find the target for the call. 785 // Return NULL if the call has no target or the target is abstract. 786 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 787 check_is_loaded(); 788 VM_ENTRY_MARK; 789 790 Klass* caller_klass = caller->get_Klass(); 791 Klass* recv = exact_receiver->get_Klass(); 792 Klass* resolved = holder()->get_Klass(); 793 Symbol* h_name = name()->get_symbol(); 794 Symbol* h_signature = signature()->get_symbol(); 795 796 LinkInfo link_info(resolved, h_name, h_signature, caller_klass, 797 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 798 methodHandle m; 799 // Only do exact lookup if receiver klass has been linked. Otherwise, 800 // the vtable has not been setup, and the LinkResolver will fail. 801 if (recv->is_array_klass() 802 || 803 (InstanceKlass::cast(recv)->is_linked() && !exact_receiver->is_interface())) { 804 if (holder()->is_interface()) { 805 m = LinkResolver::resolve_interface_call_or_null(recv, link_info); 806 } else { 807 m = LinkResolver::resolve_virtual_call_or_null(recv, link_info); 808 } 809 } 810 811 if (m.is_null()) { 812 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 813 return NULL; 814 } 815 816 ciMethod* result = this; 817 if (m() != get_Method()) { 818 result = CURRENT_THREAD_ENV->get_method(m()); 819 } 820 821 // Don't return abstract methods because they aren't 822 // optimizable or interesting. 823 if (result->is_abstract()) { 824 return NULL; 825 } else { 826 return result; 827 } 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::interpreter_call_site_count 864 int ciMethod::interpreter_call_site_count(int bci) { 865 if (method_data() != NULL) { 866 ResourceMark rm; 867 ciProfileData* data = method_data()->bci_to_data(bci); 868 if (data != NULL && data->is_CounterData()) { 869 return scale_count(data->as_CounterData()->count()); 870 } 871 } 872 return -1; // unknown 873 } 874 875 // ------------------------------------------------------------------ 876 // ciMethod::get_field_at_bci 877 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 878 ciBytecodeStream iter(this); 879 iter.reset_to_bci(bci); 880 iter.next(); 881 return iter.get_field(will_link); 882 } 883 884 // ------------------------------------------------------------------ 885 // ciMethod::get_method_at_bci 886 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 887 ciBytecodeStream iter(this); 888 iter.reset_to_bci(bci); 889 iter.next(); 890 return iter.get_method(will_link, declared_signature); 891 } 892 893 // ------------------------------------------------------------------ 894 // Adjust a CounterData count to be commensurate with 895 // interpreter_invocation_count. If the MDO exists for 896 // only 25% of the time the method exists, then the 897 // counts in the MDO should be scaled by 4X, so that 898 // they can be usefully and stably compared against the 899 // invocation counts in methods. 900 int ciMethod::scale_count(int count, float prof_factor) { 901 if (count > 0 && method_data() != NULL) { 902 int counter_life; 903 int method_life = interpreter_invocation_count(); 904 if (TieredCompilation) { 905 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 906 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 907 } else { 908 int current_mileage = method_data()->current_mileage(); 909 int creation_mileage = method_data()->creation_mileage(); 910 counter_life = current_mileage - creation_mileage; 911 } 912 913 // counter_life due to backedge_counter could be > method_life 914 if (counter_life > method_life) 915 counter_life = method_life; 916 if (0 < counter_life && counter_life <= method_life) { 917 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 918 count = (count > 0) ? count : 1; 919 } 920 } 921 return count; 922 } 923 924 925 // ------------------------------------------------------------------ 926 // ciMethod::is_special_get_caller_class_method 927 // 928 bool ciMethod::is_ignored_by_security_stack_walk() const { 929 check_is_loaded(); 930 VM_ENTRY_MARK; 931 return get_Method()->is_ignored_by_security_stack_walk(); 932 } 933 934 935 // ------------------------------------------------------------------ 936 // invokedynamic support 937 938 // ------------------------------------------------------------------ 939 // ciMethod::is_method_handle_intrinsic 940 // 941 // Return true if the method is an instance of the JVM-generated 942 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 943 bool ciMethod::is_method_handle_intrinsic() const { 944 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 945 return (MethodHandles::is_signature_polymorphic(iid) && 946 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 947 } 948 949 // ------------------------------------------------------------------ 950 // ciMethod::is_compiled_lambda_form 951 // 952 // Return true if the method is a generated MethodHandle adapter. 953 // These are built by Java code. 954 bool ciMethod::is_compiled_lambda_form() const { 955 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 956 return iid == vmIntrinsics::_compiledLambdaForm; 957 } 958 959 // ------------------------------------------------------------------ 960 // ciMethod::is_object_initializer 961 // 962 bool ciMethod::is_object_initializer() const { 963 return name() == ciSymbol::object_initializer_name(); 964 } 965 966 // ------------------------------------------------------------------ 967 // ciMethod::has_member_arg 968 // 969 // Return true if the method is a linker intrinsic like _linkToVirtual. 970 // These are built by the JVM. 971 bool ciMethod::has_member_arg() const { 972 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 973 return (MethodHandles::is_signature_polymorphic(iid) && 974 MethodHandles::has_member_arg(iid)); 975 } 976 977 // ------------------------------------------------------------------ 978 // ciMethod::ensure_method_data 979 // 980 // Generate new MethodData* objects at compile time. 981 // Return true if allocation was successful or no MDO is required. 982 bool ciMethod::ensure_method_data(const methodHandle& h_m) { 983 EXCEPTION_CONTEXT; 984 if (is_native() || is_abstract() || h_m()->is_accessor()) { 985 return true; 986 } 987 if (h_m()->method_data() == NULL) { 988 Method::build_interpreter_method_data(h_m, THREAD); 989 if (HAS_PENDING_EXCEPTION) { 990 CLEAR_PENDING_EXCEPTION; 991 } 992 } 993 if (h_m()->method_data() != NULL) { 994 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 995 _method_data->load_data(); 996 return true; 997 } else { 998 _method_data = CURRENT_ENV->get_empty_methodData(); 999 return false; 1000 } 1001 } 1002 1003 // public, retroactive version 1004 bool ciMethod::ensure_method_data() { 1005 bool result = true; 1006 if (_method_data == NULL || _method_data->is_empty()) { 1007 GUARDED_VM_ENTRY({ 1008 result = ensure_method_data(get_Method()); 1009 }); 1010 } 1011 return result; 1012 } 1013 1014 1015 // ------------------------------------------------------------------ 1016 // ciMethod::method_data 1017 // 1018 ciMethodData* ciMethod::method_data() { 1019 if (_method_data != NULL) { 1020 return _method_data; 1021 } 1022 VM_ENTRY_MARK; 1023 ciEnv* env = CURRENT_ENV; 1024 Thread* my_thread = JavaThread::current(); 1025 methodHandle h_m(my_thread, get_Method()); 1026 1027 if (h_m()->method_data() != NULL) { 1028 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1029 _method_data->load_data(); 1030 } else { 1031 _method_data = CURRENT_ENV->get_empty_methodData(); 1032 } 1033 return _method_data; 1034 1035 } 1036 1037 // ------------------------------------------------------------------ 1038 // ciMethod::method_data_or_null 1039 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1040 // NULL otherwise. 1041 ciMethodData* ciMethod::method_data_or_null() { 1042 ciMethodData *md = method_data(); 1043 if (md->is_empty()) { 1044 return NULL; 1045 } 1046 return md; 1047 } 1048 1049 // ------------------------------------------------------------------ 1050 // ciMethod::ensure_method_counters 1051 // 1052 MethodCounters* ciMethod::ensure_method_counters() { 1053 check_is_loaded(); 1054 VM_ENTRY_MARK; 1055 methodHandle mh(THREAD, get_Method()); 1056 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1057 return method_counters; 1058 } 1059 1060 // ------------------------------------------------------------------ 1061 // ciMethod::has_option 1062 // 1063 bool ciMethod::has_option(const char* option) { 1064 check_is_loaded(); 1065 VM_ENTRY_MARK; 1066 methodHandle mh(THREAD, get_Method()); 1067 return CompilerOracle::has_option_string(mh, option); 1068 } 1069 1070 // ------------------------------------------------------------------ 1071 // ciMethod::has_option_value 1072 // 1073 bool ciMethod::has_option_value(const char* option, double& value) { 1074 check_is_loaded(); 1075 VM_ENTRY_MARK; 1076 methodHandle mh(THREAD, get_Method()); 1077 return CompilerOracle::has_option_value(mh, option, value); 1078 } 1079 // ------------------------------------------------------------------ 1080 // ciMethod::can_be_compiled 1081 // 1082 // Have previous compilations of this method succeeded? 1083 bool ciMethod::can_be_compiled() { 1084 check_is_loaded(); 1085 ciEnv* env = CURRENT_ENV; 1086 if (is_c1_compile(env->comp_level())) { 1087 return _is_c1_compilable; 1088 } 1089 return _is_c2_compilable; 1090 } 1091 1092 // ------------------------------------------------------------------ 1093 // ciMethod::set_not_compilable 1094 // 1095 // Tell the VM that this method cannot be compiled at all. 1096 void ciMethod::set_not_compilable(const char* reason) { 1097 check_is_loaded(); 1098 VM_ENTRY_MARK; 1099 ciEnv* env = CURRENT_ENV; 1100 if (is_c1_compile(env->comp_level())) { 1101 _is_c1_compilable = false; 1102 } else { 1103 _is_c2_compilable = false; 1104 } 1105 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1106 } 1107 1108 // ------------------------------------------------------------------ 1109 // ciMethod::can_be_osr_compiled 1110 // 1111 // Have previous compilations of this method succeeded? 1112 // 1113 // Implementation note: the VM does not currently keep track 1114 // of failed OSR compilations per bci. The entry_bci parameter 1115 // is currently unused. 1116 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1117 check_is_loaded(); 1118 VM_ENTRY_MARK; 1119 ciEnv* env = CURRENT_ENV; 1120 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1121 } 1122 1123 // ------------------------------------------------------------------ 1124 // ciMethod::has_compiled_code 1125 bool ciMethod::has_compiled_code() { 1126 return instructions_size() > 0; 1127 } 1128 1129 int ciMethod::comp_level() { 1130 check_is_loaded(); 1131 VM_ENTRY_MARK; 1132 CompiledMethod* nm = get_Method()->code(); 1133 if (nm != NULL) return nm->comp_level(); 1134 return 0; 1135 } 1136 1137 int ciMethod::highest_osr_comp_level() { 1138 check_is_loaded(); 1139 VM_ENTRY_MARK; 1140 return get_Method()->highest_osr_comp_level(); 1141 } 1142 1143 // ------------------------------------------------------------------ 1144 // ciMethod::code_size_for_inlining 1145 // 1146 // Code size for inlining decisions. This method returns a code 1147 // size of 1 for methods which has the ForceInline annotation. 1148 int ciMethod::code_size_for_inlining() { 1149 check_is_loaded(); 1150 if (get_Method()->force_inline()) { 1151 return 1; 1152 } 1153 return code_size(); 1154 } 1155 1156 // ------------------------------------------------------------------ 1157 // ciMethod::instructions_size 1158 // 1159 // This is a rough metric for "fat" methods, compared before inlining 1160 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1161 // junk like exception handler, stubs, and constant table, which are 1162 // not highly relevant to an inlined method. So we use the more 1163 // specific accessor nmethod::insts_size. 1164 int ciMethod::instructions_size() { 1165 if (_instructions_size == -1) { 1166 GUARDED_VM_ENTRY( 1167 CompiledMethod* code = get_Method()->code(); 1168 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1169 _instructions_size = code->insts_end() - code->verified_entry_point(); 1170 } else { 1171 _instructions_size = 0; 1172 } 1173 ); 1174 } 1175 return _instructions_size; 1176 } 1177 1178 // ------------------------------------------------------------------ 1179 // ciMethod::log_nmethod_identity 1180 void ciMethod::log_nmethod_identity(xmlStream* log) { 1181 GUARDED_VM_ENTRY( 1182 CompiledMethod* code = get_Method()->code(); 1183 if (code != NULL) { 1184 code->log_identity(log); 1185 } 1186 ) 1187 } 1188 1189 // ------------------------------------------------------------------ 1190 // ciMethod::is_not_reached 1191 bool ciMethod::is_not_reached(int bci) { 1192 check_is_loaded(); 1193 VM_ENTRY_MARK; 1194 return Interpreter::is_not_reached( 1195 methodHandle(THREAD, get_Method()), bci); 1196 } 1197 1198 // ------------------------------------------------------------------ 1199 // ciMethod::was_never_executed 1200 bool ciMethod::was_executed_more_than(int times) { 1201 VM_ENTRY_MARK; 1202 return get_Method()->was_executed_more_than(times); 1203 } 1204 1205 // ------------------------------------------------------------------ 1206 // ciMethod::has_unloaded_classes_in_signature 1207 bool ciMethod::has_unloaded_classes_in_signature() { 1208 VM_ENTRY_MARK; 1209 { 1210 EXCEPTION_MARK; 1211 methodHandle m(THREAD, get_Method()); 1212 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1213 if( HAS_PENDING_EXCEPTION ) { 1214 CLEAR_PENDING_EXCEPTION; 1215 return true; // Declare that we may have unloaded classes 1216 } 1217 return has_unloaded; 1218 } 1219 } 1220 1221 // ------------------------------------------------------------------ 1222 // ciMethod::is_klass_loaded 1223 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1224 VM_ENTRY_MARK; 1225 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1226 } 1227 1228 // ------------------------------------------------------------------ 1229 // ciMethod::check_call 1230 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1231 // This method is used only in C2 from InlineTree::ok_to_inline, 1232 // and is only used under -Xcomp or -XX:CompileTheWorld. 1233 // It appears to fail when applied to an invokeinterface call site. 1234 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1235 VM_ENTRY_MARK; 1236 { 1237 EXCEPTION_MARK; 1238 HandleMark hm(THREAD); 1239 constantPoolHandle pool (THREAD, get_Method()->constants()); 1240 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1241 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1242 if (HAS_PENDING_EXCEPTION) { 1243 CLEAR_PENDING_EXCEPTION; 1244 return false; 1245 } else { 1246 return (spec_method->is_static() == is_static); 1247 } 1248 } 1249 return false; 1250 } 1251 1252 // ------------------------------------------------------------------ 1253 // ciMethod::profile_aging 1254 // 1255 // Should the method be compiled with an age counter? 1256 bool ciMethod::profile_aging() const { 1257 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1258 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1259 } 1260 // ------------------------------------------------------------------ 1261 // ciMethod::print_codes 1262 // 1263 // Print the bytecodes for this method. 1264 void ciMethod::print_codes_on(outputStream* st) { 1265 check_is_loaded(); 1266 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1267 } 1268 1269 1270 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1271 check_is_loaded(); \ 1272 VM_ENTRY_MARK; \ 1273 return get_Method()->flag_accessor(); \ 1274 } 1275 1276 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1277 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1278 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1279 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1280 bool ciMethod::is_getter () const { FETCH_FLAG_FROM_VM(is_getter); } 1281 bool ciMethod::is_setter () const { FETCH_FLAG_FROM_VM(is_setter); } 1282 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1283 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1284 1285 bool ciMethod::is_boxing_method() const { 1286 if (holder()->is_box_klass()) { 1287 switch (intrinsic_id()) { 1288 case vmIntrinsics::_Boolean_valueOf: 1289 case vmIntrinsics::_Byte_valueOf: 1290 case vmIntrinsics::_Character_valueOf: 1291 case vmIntrinsics::_Short_valueOf: 1292 case vmIntrinsics::_Integer_valueOf: 1293 case vmIntrinsics::_Long_valueOf: 1294 case vmIntrinsics::_Float_valueOf: 1295 case vmIntrinsics::_Double_valueOf: 1296 return true; 1297 default: 1298 return false; 1299 } 1300 } 1301 return false; 1302 } 1303 1304 bool ciMethod::is_unboxing_method() const { 1305 if (holder()->is_box_klass()) { 1306 switch (intrinsic_id()) { 1307 case vmIntrinsics::_booleanValue: 1308 case vmIntrinsics::_byteValue: 1309 case vmIntrinsics::_charValue: 1310 case vmIntrinsics::_shortValue: 1311 case vmIntrinsics::_intValue: 1312 case vmIntrinsics::_longValue: 1313 case vmIntrinsics::_floatValue: 1314 case vmIntrinsics::_doubleValue: 1315 return true; 1316 default: 1317 return false; 1318 } 1319 } 1320 return false; 1321 } 1322 1323 BCEscapeAnalyzer *ciMethod::get_bcea() { 1324 #ifdef COMPILER2 1325 if (_bcea == NULL) { 1326 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1327 } 1328 return _bcea; 1329 #else // COMPILER2 1330 ShouldNotReachHere(); 1331 return NULL; 1332 #endif // COMPILER2 1333 } 1334 1335 ciMethodBlocks *ciMethod::get_method_blocks() { 1336 Arena *arena = CURRENT_ENV->arena(); 1337 if (_method_blocks == NULL) { 1338 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1339 } 1340 return _method_blocks; 1341 } 1342 1343 #undef FETCH_FLAG_FROM_VM 1344 1345 void ciMethod::dump_name_as_ascii(outputStream* st) { 1346 Method* method = get_Method(); 1347 st->print("%s %s %s", 1348 method->klass_name()->as_quoted_ascii(), 1349 method->name()->as_quoted_ascii(), 1350 method->signature()->as_quoted_ascii()); 1351 } 1352 1353 void ciMethod::dump_replay_data(outputStream* st) { 1354 ResourceMark rm; 1355 Method* method = get_Method(); 1356 MethodCounters* mcs = method->method_counters(); 1357 st->print("ciMethod "); 1358 dump_name_as_ascii(st); 1359 st->print_cr(" %d %d %d %d %d", 1360 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1361 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1362 interpreter_invocation_count(), 1363 interpreter_throwout_count(), 1364 _instructions_size); 1365 } 1366 1367 // ------------------------------------------------------------------ 1368 // ciMethod::print_codes 1369 // 1370 // Print a range of the bytecodes for this method. 1371 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1372 check_is_loaded(); 1373 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1374 } 1375 1376 // ------------------------------------------------------------------ 1377 // ciMethod::print_name 1378 // 1379 // Print the name of this method, including signature and some flags. 1380 void ciMethod::print_name(outputStream* st) { 1381 check_is_loaded(); 1382 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1383 } 1384 1385 // ------------------------------------------------------------------ 1386 // ciMethod::print_short_name 1387 // 1388 // Print the name of this method, without signature. 1389 void ciMethod::print_short_name(outputStream* st) { 1390 if (is_loaded()) { 1391 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1392 } else { 1393 // Fall back if method is not loaded. 1394 holder()->print_name_on(st); 1395 st->print("::"); 1396 name()->print_symbol_on(st); 1397 if (WizardMode) 1398 signature()->as_symbol()->print_symbol_on(st); 1399 } 1400 } 1401 1402 // ------------------------------------------------------------------ 1403 // ciMethod::print_impl 1404 // 1405 // Implementation of the print method. 1406 void ciMethod::print_impl(outputStream* st) { 1407 ciMetadata::print_impl(st); 1408 st->print(" name="); 1409 name()->print_symbol_on(st); 1410 st->print(" holder="); 1411 holder()->print_name_on(st); 1412 st->print(" signature="); 1413 signature()->as_symbol()->print_symbol_on(st); 1414 if (is_loaded()) { 1415 st->print(" loaded=true"); 1416 st->print(" arg_size=%d", arg_size()); 1417 st->print(" flags="); 1418 flags().print_member_flags(st); 1419 } else { 1420 st->print(" loaded=false"); 1421 } 1422 } 1423 1424 // ------------------------------------------------------------------ 1425 1426 static BasicType erase_to_word_type(BasicType bt) { 1427 if (is_subword_type(bt)) return T_INT; 1428 if (bt == T_ARRAY) return T_OBJECT; 1429 return bt; 1430 } 1431 1432 static bool basic_types_match(ciType* t1, ciType* t2) { 1433 if (t1 == t2) return true; 1434 return erase_to_word_type(t1->basic_type()) == erase_to_word_type(t2->basic_type()); 1435 } 1436 1437 bool ciMethod::is_consistent_info(ciMethod* declared_method, ciMethod* resolved_method) { 1438 bool invoke_through_mh_intrinsic = declared_method->is_method_handle_intrinsic() && 1439 !resolved_method->is_method_handle_intrinsic(); 1440 1441 if (!invoke_through_mh_intrinsic) { 1442 // Method name & descriptor should stay the same. 1443 // Signatures may reference unloaded types and thus they may be not strictly equal. 1444 ciSymbol* declared_signature = declared_method->signature()->as_symbol(); 1445 ciSymbol* resolved_signature = resolved_method->signature()->as_symbol(); 1446 1447 return (declared_method->name()->equals(resolved_method->name())) && 1448 (declared_signature->equals(resolved_signature)); 1449 } 1450 1451 ciMethod* linker = declared_method; 1452 ciMethod* target = resolved_method; 1453 // Linkers have appendix argument which is not passed to callee. 1454 int has_appendix = MethodHandles::has_member_arg(linker->intrinsic_id()) ? 1 : 0; 1455 if (linker->arg_size() != (target->arg_size() + has_appendix)) { 1456 return false; // argument slot count mismatch 1457 } 1458 1459 ciSignature* linker_sig = linker->signature(); 1460 ciSignature* target_sig = target->signature(); 1461 1462 if (linker_sig->count() + (linker->is_static() ? 0 : 1) != 1463 target_sig->count() + (target->is_static() ? 0 : 1) + has_appendix) { 1464 return false; // argument count mismatch 1465 } 1466 1467 int sbase = 0, rbase = 0; 1468 switch (linker->intrinsic_id()) { 1469 case vmIntrinsics::_linkToVirtual: 1470 case vmIntrinsics::_linkToInterface: 1471 case vmIntrinsics::_linkToSpecial: { 1472 if (target->is_static()) { 1473 return false; 1474 } 1475 if (linker_sig->type_at(0)->is_primitive_type()) { 1476 return false; // receiver should be an oop 1477 } 1478 sbase = 1; // skip receiver 1479 break; 1480 } 1481 case vmIntrinsics::_linkToStatic: { 1482 if (!target->is_static()) { 1483 return false; 1484 } 1485 break; 1486 } 1487 case vmIntrinsics::_invokeBasic: { 1488 if (target->is_static()) { 1489 if (target_sig->type_at(0)->is_primitive_type()) { 1490 return false; // receiver should be an oop 1491 } 1492 rbase = 1; // skip receiver 1493 } 1494 break; 1495 } 1496 default: 1497 break; 1498 } 1499 assert(target_sig->count() - rbase == linker_sig->count() - sbase - has_appendix, "argument count mismatch"); 1500 int arg_count = target_sig->count() - rbase; 1501 for (int i = 0; i < arg_count; i++) { 1502 if (!basic_types_match(linker_sig->type_at(sbase + i), target_sig->type_at(rbase + i))) { 1503 return false; 1504 } 1505 } 1506 // Only check the return type if the symbolic info has non-void return type. 1507 // I.e. the return value of the resolved method can be dropped. 1508 if (!linker->return_type()->is_void() && 1509 !basic_types_match(linker->return_type(), target->return_type())) { 1510 return false; 1511 } 1512 return true; // no mismatch found 1513 } 1514 1515 // ------------------------------------------------------------------ 1516 1517 #if INCLUDE_TRACE 1518 TraceStructCalleeMethod ciMethod::to_trace_struct() const { 1519 TraceStructCalleeMethod result; 1520 result.set_type(holder()->name()->as_utf8()); 1521 result.set_name(name()->as_utf8()); 1522 result.set_descriptor(signature()->as_symbol()->as_utf8()); 1523 return result; 1524 } 1525 #endif