1 /* 2 * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciCallProfile.hpp" 27 #include "ci/ciExceptionHandler.hpp" 28 #include "ci/ciInstanceKlass.hpp" 29 #include "ci/ciMethod.hpp" 30 #include "ci/ciMethodBlocks.hpp" 31 #include "ci/ciMethodData.hpp" 32 #include "ci/ciStreams.hpp" 33 #include "ci/ciSymbol.hpp" 34 #include "ci/ciReplay.hpp" 35 #include "ci/ciUtilities.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/compilerOracle.hpp" 39 #include "compiler/methodLiveness.hpp" 40 #include "interpreter/interpreter.hpp" 41 #include "interpreter/linkResolver.hpp" 42 #include "interpreter/oopMapCache.hpp" 43 #include "memory/allocation.inline.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "oops/generateOopMap.hpp" 46 #include "oops/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 #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(methodHandle h_m, ciInstanceKlass* holder) : 72 ciMetadata(h_m()), 73 _holder(holder) 74 { 75 assert(h_m() != NULL, "no null method"); 76 77 // These fields are always filled in in loaded methods. 78 _flags = ciFlags(h_m()->access_flags()); 79 80 // Easy to compute, so fill them in now. 81 _max_stack = h_m()->max_stack(); 82 _max_locals = h_m()->max_locals(); 83 _code_size = h_m()->code_size(); 84 _intrinsic_id = h_m()->intrinsic_id(); 85 _handler_count = h_m()->exception_table_length(); 86 _size_of_parameters = h_m()->size_of_parameters(); 87 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 88 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 89 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 90 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 91 // Lazy fields, filled in on demand. Require allocation. 92 _code = NULL; 93 _exception_handlers = NULL; 94 _liveness = NULL; 95 _method_blocks = NULL; 96 #if defined(COMPILER2) || defined(SHARK) 97 _flow = NULL; 98 _bcea = NULL; 99 #endif // COMPILER2 || SHARK 100 101 ciEnv *env = CURRENT_ENV; 102 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 103 // 6328518 check hotswap conditions under the right lock. 104 MutexLocker locker(Compile_lock); 105 if (Dependencies::check_evol_method(h_m()) != NULL) { 106 _is_c1_compilable = false; 107 _is_c2_compilable = false; 108 } 109 } else { 110 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 111 } 112 113 if (h_m()->method_holder()->is_linked()) { 114 _can_be_statically_bound = h_m()->can_be_statically_bound(); 115 } else { 116 // Have to use a conservative value in this case. 117 _can_be_statically_bound = false; 118 } 119 120 // Adjust the definition of this condition to be more useful: 121 // %%% take these conditions into account in vtable generation 122 if (!_can_be_statically_bound && h_m()->is_private()) 123 _can_be_statically_bound = true; 124 if (_can_be_statically_bound && h_m()->is_abstract()) 125 _can_be_statically_bound = false; 126 127 // generating _signature may allow GC and therefore move m. 128 // These fields are always filled in. 129 _name = env->get_symbol(h_m()->name()); 130 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 131 constantPoolHandle cpool = h_m()->constants(); 132 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 133 _method_data = NULL; 134 // Take a snapshot of these values, so they will be commensurate with the MDO. 135 if (ProfileInterpreter || TieredCompilation) { 136 int invcnt = h_m()->interpreter_invocation_count(); 137 // if the value overflowed report it as max int 138 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 139 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 140 } else { 141 _interpreter_invocation_count = 0; 142 _interpreter_throwout_count = 0; 143 } 144 if (_interpreter_invocation_count == 0) 145 _interpreter_invocation_count = 1; 146 _instructions_size = -1; 147 #ifdef ASSERT 148 if (ReplayCompiles) { 149 ciReplay::initialize(this); 150 } 151 #endif 152 } 153 154 155 // ------------------------------------------------------------------ 156 // ciMethod::ciMethod 157 // 158 // Unloaded method. 159 ciMethod::ciMethod(ciInstanceKlass* holder, 160 ciSymbol* name, 161 ciSymbol* signature, 162 ciInstanceKlass* accessor) : 163 ciMetadata((Metadata*)NULL), 164 _name( name), 165 _holder( holder), 166 _intrinsic_id( vmIntrinsics::_none), 167 _liveness( NULL), 168 _can_be_statically_bound(false), 169 _method_blocks( NULL), 170 _method_data( NULL) 171 #if defined(COMPILER2) || defined(SHARK) 172 , 173 _flow( NULL), 174 _bcea( NULL), 175 _instructions_size(-1) 176 #endif // COMPILER2 || SHARK 177 { 178 // Usually holder and accessor are the same type but in some cases 179 // the holder has the wrong class loader (e.g. invokedynamic call 180 // sites) so we pass the accessor. 181 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 182 } 183 184 185 // ------------------------------------------------------------------ 186 // ciMethod::load_code 187 // 188 // Load the bytecodes and exception handler table for this method. 189 void ciMethod::load_code() { 190 VM_ENTRY_MARK; 191 assert(is_loaded(), "only loaded methods have code"); 192 193 Method* me = get_Method(); 194 Arena* arena = CURRENT_THREAD_ENV->arena(); 195 196 // Load the bytecodes. 197 _code = (address)arena->Amalloc(code_size()); 198 memcpy(_code, me->code_base(), code_size()); 199 200 // Revert any breakpoint bytecodes in ci's copy 201 if (me->number_of_breakpoints() > 0) { 202 BreakpointInfo* bp = me->method_holder()->breakpoints(); 203 for (; bp != NULL; bp = bp->next()) { 204 if (bp->match(me)) { 205 code_at_put(bp->bci(), bp->orig_bytecode()); 206 } 207 } 208 } 209 210 // And load the exception table. 211 ExceptionTable exc_table(me); 212 213 // Allocate one extra spot in our list of exceptions. This 214 // last entry will be used to represent the possibility that 215 // an exception escapes the method. See ciExceptionHandlerStream 216 // for details. 217 _exception_handlers = 218 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 219 * (_handler_count + 1)); 220 if (_handler_count > 0) { 221 for (int i=0; i<_handler_count; i++) { 222 _exception_handlers[i] = new (arena) ciExceptionHandler( 223 holder(), 224 /* start */ exc_table.start_pc(i), 225 /* limit */ exc_table.end_pc(i), 226 /* goto pc */ exc_table.handler_pc(i), 227 /* cp index */ exc_table.catch_type_index(i)); 228 } 229 } 230 231 // Put an entry at the end of our list to represent the possibility 232 // of exceptional exit. 233 _exception_handlers[_handler_count] = 234 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 235 236 if (CIPrintMethodCodes) { 237 print_codes(); 238 } 239 } 240 241 242 // ------------------------------------------------------------------ 243 // ciMethod::has_linenumber_table 244 // 245 // length unknown until decompression 246 bool ciMethod::has_linenumber_table() const { 247 check_is_loaded(); 248 VM_ENTRY_MARK; 249 return get_Method()->has_linenumber_table(); 250 } 251 252 253 // ------------------------------------------------------------------ 254 // ciMethod::compressed_linenumber_table 255 u_char* ciMethod::compressed_linenumber_table() const { 256 check_is_loaded(); 257 VM_ENTRY_MARK; 258 return get_Method()->compressed_linenumber_table(); 259 } 260 261 262 // ------------------------------------------------------------------ 263 // ciMethod::line_number_from_bci 264 int ciMethod::line_number_from_bci(int bci) const { 265 check_is_loaded(); 266 VM_ENTRY_MARK; 267 return get_Method()->line_number_from_bci(bci); 268 } 269 270 271 // ------------------------------------------------------------------ 272 // ciMethod::vtable_index 273 // 274 // Get the position of this method's entry in the vtable, if any. 275 int ciMethod::vtable_index() { 276 check_is_loaded(); 277 assert(holder()->is_linked(), "must be linked"); 278 VM_ENTRY_MARK; 279 return get_Method()->vtable_index(); 280 } 281 282 283 #ifdef SHARK 284 // ------------------------------------------------------------------ 285 // ciMethod::itable_index 286 // 287 // Get the position of this method's entry in the itable, if any. 288 int ciMethod::itable_index() { 289 check_is_loaded(); 290 assert(holder()->is_linked(), "must be linked"); 291 VM_ENTRY_MARK; 292 Method* m = get_Method(); 293 if (!m->has_itable_index()) 294 return Method::nonvirtual_vtable_index; 295 return m->itable_index(); 296 } 297 #endif // SHARK 298 299 300 // ------------------------------------------------------------------ 301 // ciMethod::native_entry 302 // 303 // Get the address of this method's native code, if any. 304 address ciMethod::native_entry() { 305 check_is_loaded(); 306 assert(flags().is_native(), "must be native method"); 307 VM_ENTRY_MARK; 308 Method* method = get_Method(); 309 address entry = method->native_function(); 310 assert(entry != NULL, "must be valid entry point"); 311 return entry; 312 } 313 314 315 // ------------------------------------------------------------------ 316 // ciMethod::interpreter_entry 317 // 318 // Get the entry point for running this method in the interpreter. 319 address ciMethod::interpreter_entry() { 320 check_is_loaded(); 321 VM_ENTRY_MARK; 322 methodHandle mh(THREAD, get_Method()); 323 return Interpreter::entry_for_method(mh); 324 } 325 326 327 // ------------------------------------------------------------------ 328 // ciMethod::uses_balanced_monitors 329 // 330 // Does this method use monitors in a strict stack-disciplined manner? 331 bool ciMethod::has_balanced_monitors() { 332 check_is_loaded(); 333 if (_balanced_monitors) return true; 334 335 // Analyze the method to see if monitors are used properly. 336 VM_ENTRY_MARK; 337 methodHandle method(THREAD, get_Method()); 338 assert(method->has_monitor_bytecodes(), "should have checked this"); 339 340 // Check to see if a previous compilation computed the 341 // monitor-matching analysis. 342 if (method->guaranteed_monitor_matching()) { 343 _balanced_monitors = true; 344 return true; 345 } 346 347 { 348 EXCEPTION_MARK; 349 ResourceMark rm(THREAD); 350 GeneratePairingInfo gpi(method); 351 gpi.compute_map(CATCH); 352 if (!gpi.monitor_safe()) { 353 return false; 354 } 355 method->set_guaranteed_monitor_matching(); 356 _balanced_monitors = true; 357 } 358 return true; 359 } 360 361 362 // ------------------------------------------------------------------ 363 // ciMethod::get_flow_analysis 364 ciTypeFlow* ciMethod::get_flow_analysis() { 365 #if defined(COMPILER2) || defined(SHARK) 366 if (_flow == NULL) { 367 ciEnv* env = CURRENT_ENV; 368 _flow = new (env->arena()) ciTypeFlow(env, this); 369 _flow->do_flow(); 370 } 371 return _flow; 372 #else // COMPILER2 || SHARK 373 ShouldNotReachHere(); 374 return NULL; 375 #endif // COMPILER2 || SHARK 376 } 377 378 379 // ------------------------------------------------------------------ 380 // ciMethod::get_osr_flow_analysis 381 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 382 #if defined(COMPILER2) || defined(SHARK) 383 // OSR entry points are always place after a call bytecode of some sort 384 assert(osr_bci >= 0, "must supply valid OSR entry point"); 385 ciEnv* env = CURRENT_ENV; 386 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 387 flow->do_flow(); 388 return flow; 389 #else // COMPILER2 || SHARK 390 ShouldNotReachHere(); 391 return NULL; 392 #endif // COMPILER2 || SHARK 393 } 394 395 // ------------------------------------------------------------------ 396 // ciMethod::raw_liveness_at_bci 397 // 398 // Which local variables are live at a specific bci? 399 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 400 check_is_loaded(); 401 if (_liveness == NULL) { 402 // Create the liveness analyzer. 403 Arena* arena = CURRENT_ENV->arena(); 404 _liveness = new (arena) MethodLiveness(arena, this); 405 _liveness->compute_liveness(); 406 } 407 return _liveness->get_liveness_at(bci); 408 } 409 410 // ------------------------------------------------------------------ 411 // ciMethod::liveness_at_bci 412 // 413 // Which local variables are live at a specific bci? When debugging 414 // will return true for all locals in some cases to improve debug 415 // information. 416 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 417 MethodLivenessResult result = raw_liveness_at_bci(bci); 418 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { 419 // Keep all locals live for the user's edification and amusement. 420 result.at_put_range(0, result.size(), true); 421 } 422 return result; 423 } 424 425 // ciMethod::live_local_oops_at_bci 426 // 427 // find all the live oops in the locals array for a particular bci 428 // Compute what the interpreter believes by using the interpreter 429 // oopmap generator. This is used as a double check during osr to 430 // guard against conservative result from MethodLiveness making us 431 // think a dead oop is live. MethodLiveness is conservative in the 432 // sense that it may consider locals to be live which cannot be live, 433 // like in the case where a local could contain an oop or a primitive 434 // along different paths. In that case the local must be dead when 435 // those paths merge. Since the interpreter's viewpoint is used when 436 // gc'ing an interpreter frame we need to use its viewpoint during 437 // OSR when loading the locals. 438 439 BitMap ciMethod::live_local_oops_at_bci(int bci) { 440 VM_ENTRY_MARK; 441 InterpreterOopMap mask; 442 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 443 int mask_size = max_locals(); 444 BitMap result(mask_size); 445 result.clear(); 446 int i; 447 for (i = 0; i < mask_size ; i++ ) { 448 if (mask.is_oop(i)) result.set_bit(i); 449 } 450 return result; 451 } 452 453 454 #ifdef COMPILER1 455 // ------------------------------------------------------------------ 456 // ciMethod::bci_block_start 457 // 458 // Marks all bcis where a new basic block starts 459 const BitMap ciMethod::bci_block_start() { 460 check_is_loaded(); 461 if (_liveness == NULL) { 462 // Create the liveness analyzer. 463 Arena* arena = CURRENT_ENV->arena(); 464 _liveness = new (arena) MethodLiveness(arena, this); 465 _liveness->compute_liveness(); 466 } 467 468 return _liveness->get_bci_block_start(); 469 } 470 #endif // COMPILER1 471 472 473 // ------------------------------------------------------------------ 474 // ciMethod::call_profile_at_bci 475 // 476 // Get the ciCallProfile for the invocation of this method. 477 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 478 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 479 ResourceMark rm; 480 ciCallProfile result; 481 if (method_data() != NULL && method_data()->is_mature()) { 482 ciProfileData* data = method_data()->bci_to_data(bci); 483 if (data != NULL && data->is_CounterData()) { 484 // Every profiled call site has a counter. 485 int count = data->as_CounterData()->count(); 486 487 if (!data->is_ReceiverTypeData()) { 488 result._receiver_count[0] = 0; // that's a definite zero 489 } else { // ReceiverTypeData is a subclass of CounterData 490 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 491 // In addition, virtual call sites have receiver type information 492 int receivers_count_total = 0; 493 int morphism = 0; 494 // Precompute morphism for the possible fixup 495 for (uint i = 0; i < call->row_limit(); i++) { 496 ciKlass* receiver = call->receiver(i); 497 if (receiver == NULL) continue; 498 morphism++; 499 } 500 int epsilon = 0; 501 if (TieredCompilation && ProfileInterpreter) { 502 // Interpreter and C1 treat final and special invokes differently. 503 // C1 will record a type, whereas the interpreter will just 504 // increment the count. Detect this case. 505 if (morphism == 1 && count > 0) { 506 epsilon = count; 507 count = 0; 508 } 509 } 510 for (uint i = 0; i < call->row_limit(); i++) { 511 ciKlass* receiver = call->receiver(i); 512 if (receiver == NULL) continue; 513 int rcount = call->receiver_count(i) + epsilon; 514 if (rcount == 0) rcount = 1; // Should be valid value 515 receivers_count_total += rcount; 516 // Add the receiver to result data. 517 result.add_receiver(receiver, rcount); 518 // If we extend profiling to record methods, 519 // we will set result._method also. 520 } 521 // Determine call site's morphism. 522 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 523 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 524 // The call site count is > 0 in the case of a polymorphic virtual call. 525 if (morphism > 0 && morphism == result._limit) { 526 // The morphism <= MorphismLimit. 527 if ((morphism < ciCallProfile::MorphismLimit) || 528 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 529 #ifdef ASSERT 530 if (count > 0) { 531 this->print_short_name(tty); 532 tty->print_cr(" @ bci:%d", bci); 533 this->print_codes(); 534 assert(false, "this call site should not be polymorphic"); 535 } 536 #endif 537 result._morphism = morphism; 538 } 539 } 540 // Make the count consistent if this is a call profile. If count is 541 // zero or less, presume that this is a typecheck profile and 542 // do nothing. Otherwise, increase count to be the sum of all 543 // receiver's counts. 544 if (count >= 0) { 545 count += receivers_count_total; 546 } 547 } 548 result._count = count; 549 } 550 } 551 return result; 552 } 553 554 // ------------------------------------------------------------------ 555 // Add new receiver and sort data by receiver's profile count. 556 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 557 // Add new receiver and sort data by receiver's counts when we have space 558 // for it otherwise replace the less called receiver (less called receiver 559 // is placed to the last array element which is not used). 560 // First array's element contains most called receiver. 561 int i = _limit; 562 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 563 _receiver[i] = _receiver[i-1]; 564 _receiver_count[i] = _receiver_count[i-1]; 565 } 566 _receiver[i] = receiver; 567 _receiver_count[i] = receiver_count; 568 if (_limit < MorphismLimit) _limit++; 569 } 570 571 572 void ciMethod::assert_virtual_call_type_ok(int bci) { 573 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 574 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); 575 } 576 577 void ciMethod::assert_call_type_ok(int bci) { 578 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 579 java_code_at_bci(bci) == Bytecodes::_invokespecial || 580 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); 581 } 582 583 /** 584 * Check whether profiling provides a type for the argument i to the 585 * call at bci bci 586 * 587 * @param bci bci of the call 588 * @param i argument number 589 * @return profiled type 590 * 591 * If the profile reports that the argument may be null, return false 592 * at least for now. 593 */ 594 ciKlass* ciMethod::argument_profiled_type(int bci, int i) { 595 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 596 ciProfileData* data = method_data()->bci_to_data(bci); 597 if (data != NULL) { 598 if (data->is_VirtualCallTypeData()) { 599 assert_virtual_call_type_ok(bci); 600 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 601 if (i >= call->number_of_arguments()) { 602 return NULL; 603 } 604 ciKlass* type = call->valid_argument_type(i); 605 if (type != NULL && !call->argument_maybe_null(i)) { 606 return type; 607 } 608 } else if (data->is_CallTypeData()) { 609 assert_call_type_ok(bci); 610 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 611 if (i >= call->number_of_arguments()) { 612 return NULL; 613 } 614 ciKlass* type = call->valid_argument_type(i); 615 if (type != NULL && !call->argument_maybe_null(i)) { 616 return type; 617 } 618 } 619 } 620 } 621 return NULL; 622 } 623 624 /** 625 * Check whether profiling provides a type for the return value from 626 * the call at bci bci 627 * 628 * @param bci bci of the call 629 * @return profiled type 630 * 631 * If the profile reports that the argument may be null, return false 632 * at least for now. 633 */ 634 ciKlass* ciMethod::return_profiled_type(int bci) { 635 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 636 ciProfileData* data = method_data()->bci_to_data(bci); 637 if (data != NULL) { 638 if (data->is_VirtualCallTypeData()) { 639 assert_virtual_call_type_ok(bci); 640 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 641 ciKlass* type = call->valid_return_type(); 642 if (type != NULL && !call->return_maybe_null()) { 643 return type; 644 } 645 } else if (data->is_CallTypeData()) { 646 assert_call_type_ok(bci); 647 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 648 ciKlass* type = call->valid_return_type(); 649 if (type != NULL && !call->return_maybe_null()) { 650 return type; 651 } 652 } 653 } 654 } 655 return NULL; 656 } 657 658 /** 659 * Check whether profiling provides a type for the parameter i 660 * 661 * @param i parameter number 662 * @return profiled type 663 * 664 * If the profile reports that the argument may be null, return false 665 * at least for now. 666 */ 667 ciKlass* ciMethod::parameter_profiled_type(int i) { 668 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 669 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 670 if (parameters != NULL && i < parameters->number_of_parameters()) { 671 ciKlass* type = parameters->valid_parameter_type(i); 672 if (type != NULL && !parameters->parameter_maybe_null(i)) { 673 return type; 674 } 675 } 676 } 677 return NULL; 678 } 679 680 681 // ------------------------------------------------------------------ 682 // ciMethod::find_monomorphic_target 683 // 684 // Given a certain calling environment, find the monomorphic target 685 // for the call. Return NULL if the call is not monomorphic in 686 // its calling environment, or if there are only abstract methods. 687 // The returned method is never abstract. 688 // Note: If caller uses a non-null result, it must inform dependencies 689 // via assert_unique_concrete_method or assert_leaf_type. 690 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 691 ciInstanceKlass* callee_holder, 692 ciInstanceKlass* actual_recv, 693 bool check_access) { 694 check_is_loaded(); 695 696 if (actual_recv->is_interface()) { 697 // %%% We cannot trust interface types, yet. See bug 6312651. 698 return NULL; 699 } 700 701 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 702 if (root_m == NULL) { 703 // Something went wrong looking up the actual receiver method. 704 return NULL; 705 } 706 assert(!root_m->is_abstract(), "resolve_invoke promise"); 707 708 // Make certain quick checks even if UseCHA is false. 709 710 // Is it private or final? 711 if (root_m->can_be_statically_bound()) { 712 return root_m; 713 } 714 715 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 716 // Easy case. There is no other place to put a method, so don't bother 717 // to go through the VM_ENTRY_MARK and all the rest. 718 return root_m; 719 } 720 721 // Array methods (clone, hashCode, etc.) are always statically bound. 722 // If we were to see an array type here, we'd return root_m. 723 // However, this method processes only ciInstanceKlasses. (See 4962591.) 724 // The inline_native_clone intrinsic narrows Object to T[] properly, 725 // so there is no need to do the same job here. 726 727 if (!UseCHA) return NULL; 728 729 VM_ENTRY_MARK; 730 731 // Disable CHA for default methods for now 732 if (root_m->get_Method()->is_default_method()) { 733 return NULL; 734 } 735 736 methodHandle target; 737 { 738 MutexLocker locker(Compile_lock); 739 Klass* context = actual_recv->get_Klass(); 740 target = Dependencies::find_unique_concrete_method(context, 741 root_m->get_Method()); 742 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 743 } 744 745 #ifndef PRODUCT 746 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 747 tty->print("found a non-root unique target method"); 748 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); 749 tty->print(" method = "); 750 target->print_short_name(tty); 751 tty->cr(); 752 } 753 #endif //PRODUCT 754 755 if (target() == NULL) { 756 return NULL; 757 } 758 if (target() == root_m->get_Method()) { 759 return root_m; 760 } 761 if (!root_m->is_public() && 762 !root_m->is_protected()) { 763 // If we are going to reason about inheritance, it's easiest 764 // if the method in question is public, protected, or private. 765 // If the answer is not root_m, it is conservatively correct 766 // to return NULL, even if the CHA encountered irrelevant 767 // methods in other packages. 768 // %%% TO DO: Work out logic for package-private methods 769 // with the same name but different vtable indexes. 770 return NULL; 771 } 772 return CURRENT_THREAD_ENV->get_method(target()); 773 } 774 775 // ------------------------------------------------------------------ 776 // ciMethod::resolve_invoke 777 // 778 // Given a known receiver klass, find the target for the call. 779 // Return NULL if the call has no target or the target is abstract. 780 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 781 check_is_loaded(); 782 VM_ENTRY_MARK; 783 784 KlassHandle caller_klass (THREAD, caller->get_Klass()); 785 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 786 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 787 Symbol* h_name = name()->get_symbol(); 788 Symbol* h_signature = signature()->get_symbol(); 789 790 methodHandle m; 791 // Only do exact lookup if receiver klass has been linked. Otherwise, 792 // the vtable has not been setup, and the LinkResolver will fail. 793 if (h_recv->oop_is_array() 794 || 795 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 796 if (holder()->is_interface()) { 797 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access); 798 } else { 799 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass, check_access); 800 } 801 } 802 803 if (m.is_null()) { 804 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 805 return NULL; 806 } 807 808 ciMethod* result = this; 809 if (m() != get_Method()) { 810 result = CURRENT_THREAD_ENV->get_method(m()); 811 } 812 813 // Don't return abstract methods because they aren't 814 // optimizable or interesting. 815 if (result->is_abstract()) { 816 return NULL; 817 } else { 818 return result; 819 } 820 } 821 822 // ------------------------------------------------------------------ 823 // ciMethod::resolve_vtable_index 824 // 825 // Given a known receiver klass, find the vtable index for the call. 826 // Return Method::invalid_vtable_index if the vtable_index is unknown. 827 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 828 check_is_loaded(); 829 830 int vtable_index = Method::invalid_vtable_index; 831 // Only do lookup if receiver klass has been linked. Otherwise, 832 // the vtable has not been setup, and the LinkResolver will fail. 833 if (!receiver->is_interface() 834 && (!receiver->is_instance_klass() || 835 receiver->as_instance_klass()->is_linked())) { 836 VM_ENTRY_MARK; 837 838 KlassHandle caller_klass (THREAD, caller->get_Klass()); 839 KlassHandle h_recv (THREAD, receiver->get_Klass()); 840 Symbol* h_name = name()->get_symbol(); 841 Symbol* h_signature = signature()->get_symbol(); 842 843 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); 844 if (vtable_index == Method::nonvirtual_vtable_index) { 845 // A statically bound method. Return "no such index". 846 vtable_index = Method::invalid_vtable_index; 847 } 848 } 849 850 return vtable_index; 851 } 852 853 // ------------------------------------------------------------------ 854 // ciMethod::interpreter_call_site_count 855 int ciMethod::interpreter_call_site_count(int bci) { 856 if (method_data() != NULL) { 857 ResourceMark rm; 858 ciProfileData* data = method_data()->bci_to_data(bci); 859 if (data != NULL && data->is_CounterData()) { 860 return scale_count(data->as_CounterData()->count()); 861 } 862 } 863 return -1; // unknown 864 } 865 866 // ------------------------------------------------------------------ 867 // ciMethod::get_field_at_bci 868 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 869 ciBytecodeStream iter(this); 870 iter.reset_to_bci(bci); 871 iter.next(); 872 return iter.get_field(will_link); 873 } 874 875 // ------------------------------------------------------------------ 876 // ciMethod::get_method_at_bci 877 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 878 ciBytecodeStream iter(this); 879 iter.reset_to_bci(bci); 880 iter.next(); 881 return iter.get_method(will_link, declared_signature); 882 } 883 884 // ------------------------------------------------------------------ 885 // Adjust a CounterData count to be commensurate with 886 // interpreter_invocation_count. If the MDO exists for 887 // only 25% of the time the method exists, then the 888 // counts in the MDO should be scaled by 4X, so that 889 // they can be usefully and stably compared against the 890 // invocation counts in methods. 891 int ciMethod::scale_count(int count, float prof_factor) { 892 if (count > 0 && method_data() != NULL) { 893 int counter_life; 894 int method_life = interpreter_invocation_count(); 895 if (TieredCompilation) { 896 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 897 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 898 } else { 899 int current_mileage = method_data()->current_mileage(); 900 int creation_mileage = method_data()->creation_mileage(); 901 counter_life = current_mileage - creation_mileage; 902 } 903 904 // counter_life due to backedge_counter could be > method_life 905 if (counter_life > method_life) 906 counter_life = method_life; 907 if (0 < counter_life && counter_life <= method_life) { 908 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 909 count = (count > 0) ? count : 1; 910 } 911 } 912 return count; 913 } 914 915 916 // ------------------------------------------------------------------ 917 // ciMethod::is_special_get_caller_class_method 918 // 919 bool ciMethod::is_ignored_by_security_stack_walk() const { 920 check_is_loaded(); 921 VM_ENTRY_MARK; 922 return get_Method()->is_ignored_by_security_stack_walk(); 923 } 924 925 926 // ------------------------------------------------------------------ 927 // invokedynamic support 928 929 // ------------------------------------------------------------------ 930 // ciMethod::is_method_handle_intrinsic 931 // 932 // Return true if the method is an instance of the JVM-generated 933 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 934 bool ciMethod::is_method_handle_intrinsic() const { 935 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 936 return (MethodHandles::is_signature_polymorphic(iid) && 937 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 938 } 939 940 // ------------------------------------------------------------------ 941 // ciMethod::is_compiled_lambda_form 942 // 943 // Return true if the method is a generated MethodHandle adapter. 944 // These are built by Java code. 945 bool ciMethod::is_compiled_lambda_form() const { 946 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 947 return iid == vmIntrinsics::_compiledLambdaForm; 948 } 949 950 // ------------------------------------------------------------------ 951 // ciMethod::is_object_initializer 952 // 953 bool ciMethod::is_object_initializer() const { 954 return name() == ciSymbol::object_initializer_name(); 955 } 956 957 // ------------------------------------------------------------------ 958 // ciMethod::has_member_arg 959 // 960 // Return true if the method is a linker intrinsic like _linkToVirtual. 961 // These are built by the JVM. 962 bool ciMethod::has_member_arg() const { 963 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 964 return (MethodHandles::is_signature_polymorphic(iid) && 965 MethodHandles::has_member_arg(iid)); 966 } 967 968 // ------------------------------------------------------------------ 969 // ciMethod::ensure_method_data 970 // 971 // Generate new MethodData* objects at compile time. 972 // Return true if allocation was successful or no MDO is required. 973 bool ciMethod::ensure_method_data(methodHandle h_m) { 974 EXCEPTION_CONTEXT; 975 if (is_native() || is_abstract() || h_m()->is_accessor()) { 976 return true; 977 } 978 if (h_m()->method_data() == NULL) { 979 Method::build_interpreter_method_data(h_m, THREAD); 980 if (HAS_PENDING_EXCEPTION) { 981 CLEAR_PENDING_EXCEPTION; 982 } 983 } 984 if (h_m()->method_data() != NULL) { 985 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 986 _method_data->load_data(); 987 return true; 988 } else { 989 _method_data = CURRENT_ENV->get_empty_methodData(); 990 return false; 991 } 992 } 993 994 // public, retroactive version 995 bool ciMethod::ensure_method_data() { 996 bool result = true; 997 if (_method_data == NULL || _method_data->is_empty()) { 998 GUARDED_VM_ENTRY({ 999 result = ensure_method_data(get_Method()); 1000 }); 1001 } 1002 return result; 1003 } 1004 1005 1006 // ------------------------------------------------------------------ 1007 // ciMethod::method_data 1008 // 1009 ciMethodData* ciMethod::method_data() { 1010 if (_method_data != NULL) { 1011 return _method_data; 1012 } 1013 VM_ENTRY_MARK; 1014 ciEnv* env = CURRENT_ENV; 1015 Thread* my_thread = JavaThread::current(); 1016 methodHandle h_m(my_thread, get_Method()); 1017 1018 if (h_m()->method_data() != NULL) { 1019 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1020 _method_data->load_data(); 1021 } else { 1022 _method_data = CURRENT_ENV->get_empty_methodData(); 1023 } 1024 return _method_data; 1025 1026 } 1027 1028 // ------------------------------------------------------------------ 1029 // ciMethod::method_data_or_null 1030 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1031 // NULL otherwise. 1032 ciMethodData* ciMethod::method_data_or_null() { 1033 ciMethodData *md = method_data(); 1034 if (md->is_empty()) { 1035 return NULL; 1036 } 1037 return md; 1038 } 1039 1040 // ------------------------------------------------------------------ 1041 // ciMethod::ensure_method_counters 1042 // 1043 MethodCounters* ciMethod::ensure_method_counters() { 1044 check_is_loaded(); 1045 VM_ENTRY_MARK; 1046 methodHandle mh(THREAD, get_Method()); 1047 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1048 return method_counters; 1049 } 1050 1051 // ------------------------------------------------------------------ 1052 // ciMethod::should_exclude 1053 // 1054 // Should this method be excluded from compilation? 1055 bool ciMethod::should_exclude() { 1056 check_is_loaded(); 1057 VM_ENTRY_MARK; 1058 methodHandle mh(THREAD, get_Method()); 1059 bool ignore; 1060 return CompilerOracle::should_exclude(mh, ignore); 1061 } 1062 1063 // ------------------------------------------------------------------ 1064 // ciMethod::should_inline 1065 // 1066 // Should this method be inlined during compilation? 1067 bool ciMethod::should_inline() { 1068 check_is_loaded(); 1069 VM_ENTRY_MARK; 1070 methodHandle mh(THREAD, get_Method()); 1071 return CompilerOracle::should_inline(mh); 1072 } 1073 1074 // ------------------------------------------------------------------ 1075 // ciMethod::should_not_inline 1076 // 1077 // Should this method be disallowed from inlining during compilation? 1078 bool ciMethod::should_not_inline() { 1079 check_is_loaded(); 1080 VM_ENTRY_MARK; 1081 methodHandle mh(THREAD, get_Method()); 1082 return CompilerOracle::should_not_inline(mh); 1083 } 1084 1085 // ------------------------------------------------------------------ 1086 // ciMethod::should_print_assembly 1087 // 1088 // Should the compiler print the generated code for this method? 1089 bool ciMethod::should_print_assembly() { 1090 check_is_loaded(); 1091 VM_ENTRY_MARK; 1092 methodHandle mh(THREAD, get_Method()); 1093 return CompilerOracle::should_print(mh); 1094 } 1095 1096 // ------------------------------------------------------------------ 1097 // ciMethod::break_at_execute 1098 // 1099 // Should the compiler insert a breakpoint into the generated code 1100 // method? 1101 bool ciMethod::break_at_execute() { 1102 check_is_loaded(); 1103 VM_ENTRY_MARK; 1104 methodHandle mh(THREAD, get_Method()); 1105 return CompilerOracle::should_break_at(mh); 1106 } 1107 1108 // ------------------------------------------------------------------ 1109 // ciMethod::has_option 1110 // 1111 bool ciMethod::has_option(const char* option) { 1112 check_is_loaded(); 1113 VM_ENTRY_MARK; 1114 methodHandle mh(THREAD, get_Method()); 1115 return CompilerOracle::has_option_string(mh, option); 1116 } 1117 1118 // ------------------------------------------------------------------ 1119 // ciMethod::has_option_value 1120 // 1121 template<typename T> 1122 bool ciMethod::has_option_value(const char* option, T& value) { 1123 check_is_loaded(); 1124 VM_ENTRY_MARK; 1125 methodHandle mh(THREAD, get_Method()); 1126 return CompilerOracle::has_option_value(mh, option, value); 1127 } 1128 // Explicit instantiation for all OptionTypes supported. 1129 template bool ciMethod::has_option_value<intx>(const char* option, intx& value); 1130 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value); 1131 template bool ciMethod::has_option_value<bool>(const char* option, bool& value); 1132 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value); 1133 1134 // ------------------------------------------------------------------ 1135 // ciMethod::can_be_compiled 1136 // 1137 // Have previous compilations of this method succeeded? 1138 bool ciMethod::can_be_compiled() { 1139 check_is_loaded(); 1140 ciEnv* env = CURRENT_ENV; 1141 if (is_c1_compile(env->comp_level())) { 1142 return _is_c1_compilable; 1143 } 1144 return _is_c2_compilable; 1145 } 1146 1147 // ------------------------------------------------------------------ 1148 // ciMethod::set_not_compilable 1149 // 1150 // Tell the VM that this method cannot be compiled at all. 1151 void ciMethod::set_not_compilable(const char* reason) { 1152 check_is_loaded(); 1153 VM_ENTRY_MARK; 1154 ciEnv* env = CURRENT_ENV; 1155 if (is_c1_compile(env->comp_level())) { 1156 _is_c1_compilable = false; 1157 } else { 1158 _is_c2_compilable = false; 1159 } 1160 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1161 } 1162 1163 // ------------------------------------------------------------------ 1164 // ciMethod::can_be_osr_compiled 1165 // 1166 // Have previous compilations of this method succeeded? 1167 // 1168 // Implementation note: the VM does not currently keep track 1169 // of failed OSR compilations per bci. The entry_bci parameter 1170 // is currently unused. 1171 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1172 check_is_loaded(); 1173 VM_ENTRY_MARK; 1174 ciEnv* env = CURRENT_ENV; 1175 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1176 } 1177 1178 // ------------------------------------------------------------------ 1179 // ciMethod::has_compiled_code 1180 bool ciMethod::has_compiled_code() { 1181 return instructions_size() > 0; 1182 } 1183 1184 int ciMethod::comp_level() { 1185 check_is_loaded(); 1186 VM_ENTRY_MARK; 1187 nmethod* nm = get_Method()->code(); 1188 if (nm != NULL) return nm->comp_level(); 1189 return 0; 1190 } 1191 1192 int ciMethod::highest_osr_comp_level() { 1193 check_is_loaded(); 1194 VM_ENTRY_MARK; 1195 return get_Method()->highest_osr_comp_level(); 1196 } 1197 1198 // ------------------------------------------------------------------ 1199 // ciMethod::code_size_for_inlining 1200 // 1201 // Code size for inlining decisions. This method returns a code 1202 // size of 1 for methods which has the ForceInline annotation. 1203 int ciMethod::code_size_for_inlining() { 1204 check_is_loaded(); 1205 if (get_Method()->force_inline()) { 1206 return 1; 1207 } 1208 return code_size(); 1209 } 1210 1211 // ------------------------------------------------------------------ 1212 // ciMethod::instructions_size 1213 // 1214 // This is a rough metric for "fat" methods, compared before inlining 1215 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1216 // junk like exception handler, stubs, and constant table, which are 1217 // not highly relevant to an inlined method. So we use the more 1218 // specific accessor nmethod::insts_size. 1219 int ciMethod::instructions_size() { 1220 if (_instructions_size == -1) { 1221 GUARDED_VM_ENTRY( 1222 nmethod* code = get_Method()->code(); 1223 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1224 _instructions_size = code->insts_end() - code->verified_entry_point(); 1225 } else { 1226 _instructions_size = 0; 1227 } 1228 ); 1229 } 1230 return _instructions_size; 1231 } 1232 1233 // ------------------------------------------------------------------ 1234 // ciMethod::log_nmethod_identity 1235 void ciMethod::log_nmethod_identity(xmlStream* log) { 1236 GUARDED_VM_ENTRY( 1237 nmethod* code = get_Method()->code(); 1238 if (code != NULL) { 1239 code->log_identity(log); 1240 } 1241 ) 1242 } 1243 1244 // ------------------------------------------------------------------ 1245 // ciMethod::is_not_reached 1246 bool ciMethod::is_not_reached(int bci) { 1247 check_is_loaded(); 1248 VM_ENTRY_MARK; 1249 return Interpreter::is_not_reached( 1250 methodHandle(THREAD, get_Method()), bci); 1251 } 1252 1253 // ------------------------------------------------------------------ 1254 // ciMethod::was_never_executed 1255 bool ciMethod::was_executed_more_than(int times) { 1256 VM_ENTRY_MARK; 1257 return get_Method()->was_executed_more_than(times); 1258 } 1259 1260 // ------------------------------------------------------------------ 1261 // ciMethod::has_unloaded_classes_in_signature 1262 bool ciMethod::has_unloaded_classes_in_signature() { 1263 VM_ENTRY_MARK; 1264 { 1265 EXCEPTION_MARK; 1266 methodHandle m(THREAD, get_Method()); 1267 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1268 if( HAS_PENDING_EXCEPTION ) { 1269 CLEAR_PENDING_EXCEPTION; 1270 return true; // Declare that we may have unloaded classes 1271 } 1272 return has_unloaded; 1273 } 1274 } 1275 1276 // ------------------------------------------------------------------ 1277 // ciMethod::is_klass_loaded 1278 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1279 VM_ENTRY_MARK; 1280 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1281 } 1282 1283 // ------------------------------------------------------------------ 1284 // ciMethod::check_call 1285 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1286 // This method is used only in C2 from InlineTree::ok_to_inline, 1287 // and is only used under -Xcomp or -XX:CompileTheWorld. 1288 // It appears to fail when applied to an invokeinterface call site. 1289 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1290 VM_ENTRY_MARK; 1291 { 1292 EXCEPTION_MARK; 1293 HandleMark hm(THREAD); 1294 constantPoolHandle pool (THREAD, get_Method()->constants()); 1295 methodHandle spec_method; 1296 KlassHandle spec_klass; 1297 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1298 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); 1299 if (HAS_PENDING_EXCEPTION) { 1300 CLEAR_PENDING_EXCEPTION; 1301 return false; 1302 } else { 1303 return (spec_method->is_static() == is_static); 1304 } 1305 } 1306 return false; 1307 } 1308 1309 // ------------------------------------------------------------------ 1310 // ciMethod::print_codes 1311 // 1312 // Print the bytecodes for this method. 1313 void ciMethod::print_codes_on(outputStream* st) { 1314 check_is_loaded(); 1315 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1316 } 1317 1318 1319 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1320 check_is_loaded(); \ 1321 VM_ENTRY_MARK; \ 1322 return get_Method()->flag_accessor(); \ 1323 } 1324 1325 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1326 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1327 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1328 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1329 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1330 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1331 1332 bool ciMethod::is_boxing_method() const { 1333 if (holder()->is_box_klass()) { 1334 switch (intrinsic_id()) { 1335 case vmIntrinsics::_Boolean_valueOf: 1336 case vmIntrinsics::_Byte_valueOf: 1337 case vmIntrinsics::_Character_valueOf: 1338 case vmIntrinsics::_Short_valueOf: 1339 case vmIntrinsics::_Integer_valueOf: 1340 case vmIntrinsics::_Long_valueOf: 1341 case vmIntrinsics::_Float_valueOf: 1342 case vmIntrinsics::_Double_valueOf: 1343 return true; 1344 default: 1345 return false; 1346 } 1347 } 1348 return false; 1349 } 1350 1351 bool ciMethod::is_unboxing_method() const { 1352 if (holder()->is_box_klass()) { 1353 switch (intrinsic_id()) { 1354 case vmIntrinsics::_booleanValue: 1355 case vmIntrinsics::_byteValue: 1356 case vmIntrinsics::_charValue: 1357 case vmIntrinsics::_shortValue: 1358 case vmIntrinsics::_intValue: 1359 case vmIntrinsics::_longValue: 1360 case vmIntrinsics::_floatValue: 1361 case vmIntrinsics::_doubleValue: 1362 return true; 1363 default: 1364 return false; 1365 } 1366 } 1367 return false; 1368 } 1369 1370 BCEscapeAnalyzer *ciMethod::get_bcea() { 1371 #ifdef COMPILER2 1372 if (_bcea == NULL) { 1373 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1374 } 1375 return _bcea; 1376 #else // COMPILER2 1377 ShouldNotReachHere(); 1378 return NULL; 1379 #endif // COMPILER2 1380 } 1381 1382 ciMethodBlocks *ciMethod::get_method_blocks() { 1383 Arena *arena = CURRENT_ENV->arena(); 1384 if (_method_blocks == NULL) { 1385 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1386 } 1387 return _method_blocks; 1388 } 1389 1390 #undef FETCH_FLAG_FROM_VM 1391 1392 void ciMethod::dump_name_as_ascii(outputStream* st) { 1393 Method* method = get_Method(); 1394 st->print("%s %s %s", 1395 method->klass_name()->as_quoted_ascii(), 1396 method->name()->as_quoted_ascii(), 1397 method->signature()->as_quoted_ascii()); 1398 } 1399 1400 void ciMethod::dump_replay_data(outputStream* st) { 1401 ResourceMark rm; 1402 Method* method = get_Method(); 1403 MethodCounters* mcs = method->method_counters(); 1404 st->print("ciMethod "); 1405 dump_name_as_ascii(st); 1406 st->print_cr(" %d %d %d %d %d", 1407 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1408 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1409 interpreter_invocation_count(), 1410 interpreter_throwout_count(), 1411 _instructions_size); 1412 } 1413 1414 // ------------------------------------------------------------------ 1415 // ciMethod::print_codes 1416 // 1417 // Print a range of the bytecodes for this method. 1418 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1419 check_is_loaded(); 1420 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1421 } 1422 1423 // ------------------------------------------------------------------ 1424 // ciMethod::print_name 1425 // 1426 // Print the name of this method, including signature and some flags. 1427 void ciMethod::print_name(outputStream* st) { 1428 check_is_loaded(); 1429 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1430 } 1431 1432 // ------------------------------------------------------------------ 1433 // ciMethod::print_short_name 1434 // 1435 // Print the name of this method, without signature. 1436 void ciMethod::print_short_name(outputStream* st) { 1437 if (is_loaded()) { 1438 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1439 } else { 1440 // Fall back if method is not loaded. 1441 holder()->print_name_on(st); 1442 st->print("::"); 1443 name()->print_symbol_on(st); 1444 if (WizardMode) 1445 signature()->as_symbol()->print_symbol_on(st); 1446 } 1447 } 1448 1449 // ------------------------------------------------------------------ 1450 // ciMethod::print_impl 1451 // 1452 // Implementation of the print method. 1453 void ciMethod::print_impl(outputStream* st) { 1454 ciMetadata::print_impl(st); 1455 st->print(" name="); 1456 name()->print_symbol_on(st); 1457 st->print(" holder="); 1458 holder()->print_name_on(st); 1459 st->print(" signature="); 1460 signature()->as_symbol()->print_symbol_on(st); 1461 if (is_loaded()) { 1462 st->print(" loaded=true"); 1463 st->print(" arg_size=%d", arg_size()); 1464 st->print(" flags="); 1465 flags().print_member_flags(st); 1466 } else { 1467 st->print(" loaded=false"); 1468 } 1469 } 1470 1471 #if INCLUDE_TRACE 1472 TraceStructCalleeMethod ciMethod::to_trace_struct() const { 1473 TraceStructCalleeMethod result; 1474 result.set_type(holder()->name()->as_utf8()); 1475 result.set_name(name()->as_utf8()); 1476 result.set_descriptor(signature()->as_symbol()->as_utf8()); 1477 return result; 1478 } 1479 #endif