1 /* 2 * Copyright (c) 1999, 2013, 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) : ciMetadata(h_m()) { 72 assert(h_m() != NULL, "no null method"); 73 74 // These fields are always filled in in loaded methods. 75 _flags = ciFlags(h_m()->access_flags()); 76 77 // Easy to compute, so fill them in now. 78 _max_stack = h_m()->max_stack(); 79 _max_locals = h_m()->max_locals(); 80 _code_size = h_m()->code_size(); 81 _intrinsic_id = h_m()->intrinsic_id(); 82 _handler_count = h_m()->exception_table_length(); 83 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 84 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 85 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 86 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 87 // Lazy fields, filled in on demand. Require allocation. 88 _code = NULL; 89 _exception_handlers = NULL; 90 _liveness = NULL; 91 _method_blocks = NULL; 92 #if defined(COMPILER2) || defined(SHARK) 93 _flow = NULL; 94 _bcea = NULL; 95 #endif // COMPILER2 || SHARK 96 97 ciEnv *env = CURRENT_ENV; 98 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 99 // 6328518 check hotswap conditions under the right lock. 100 MutexLocker locker(Compile_lock); 101 if (Dependencies::check_evol_method(h_m()) != NULL) { 102 _is_c1_compilable = false; 103 _is_c2_compilable = false; 104 } 105 } else { 106 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 107 } 108 109 if (h_m()->method_holder()->is_linked()) { 110 _can_be_statically_bound = h_m()->can_be_statically_bound(); 111 } else { 112 // Have to use a conservative value in this case. 113 _can_be_statically_bound = false; 114 } 115 116 // Adjust the definition of this condition to be more useful: 117 // %%% take these conditions into account in vtable generation 118 if (!_can_be_statically_bound && h_m()->is_private()) 119 _can_be_statically_bound = true; 120 if (_can_be_statically_bound && h_m()->is_abstract()) 121 _can_be_statically_bound = false; 122 123 // generating _signature may allow GC and therefore move m. 124 // These fields are always filled in. 125 _name = env->get_symbol(h_m()->name()); 126 _holder = env->get_instance_klass(h_m()->method_holder()); 127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 128 constantPoolHandle cpool = h_m()->constants(); 129 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 130 _method_data = NULL; 131 // Take a snapshot of these values, so they will be commensurate with the MDO. 132 if (ProfileInterpreter || TieredCompilation) { 133 int invcnt = h_m()->interpreter_invocation_count(); 134 // if the value overflowed report it as max int 135 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 136 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 137 } else { 138 _interpreter_invocation_count = 0; 139 _interpreter_throwout_count = 0; 140 } 141 if (_interpreter_invocation_count == 0) 142 _interpreter_invocation_count = 1; 143 _instructions_size = -1; 144 #ifdef ASSERT 145 if (ReplayCompiles) { 146 ciReplay::initialize(this); 147 } 148 #endif 149 } 150 151 152 // ------------------------------------------------------------------ 153 // ciMethod::ciMethod 154 // 155 // Unloaded method. 156 ciMethod::ciMethod(ciInstanceKlass* holder, 157 ciSymbol* name, 158 ciSymbol* signature, 159 ciInstanceKlass* accessor) : 160 ciMetadata((Metadata*)NULL), 161 _name( name), 162 _holder( holder), 163 _intrinsic_id( vmIntrinsics::_none), 164 _liveness( NULL), 165 _can_be_statically_bound(false), 166 _method_blocks( NULL), 167 _method_data( NULL) 168 #if defined(COMPILER2) || defined(SHARK) 169 , 170 _flow( NULL), 171 _bcea( NULL), 172 _instructions_size(-1) 173 #endif // COMPILER2 || SHARK 174 { 175 // Usually holder and accessor are the same type but in some cases 176 // the holder has the wrong class loader (e.g. invokedynamic call 177 // sites) so we pass the accessor. 178 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 179 } 180 181 182 // ------------------------------------------------------------------ 183 // ciMethod::load_code 184 // 185 // Load the bytecodes and exception handler table for this method. 186 void ciMethod::load_code() { 187 VM_ENTRY_MARK; 188 assert(is_loaded(), "only loaded methods have code"); 189 190 Method* me = get_Method(); 191 Arena* arena = CURRENT_THREAD_ENV->arena(); 192 193 // Load the bytecodes. 194 _code = (address)arena->Amalloc(code_size()); 195 memcpy(_code, me->code_base(), code_size()); 196 197 // Revert any breakpoint bytecodes in ci's copy 198 if (me->number_of_breakpoints() > 0) { 199 BreakpointInfo* bp = me->method_holder()->breakpoints(); 200 for (; bp != NULL; bp = bp->next()) { 201 if (bp->match(me)) { 202 code_at_put(bp->bci(), bp->orig_bytecode()); 203 } 204 } 205 } 206 207 // And load the exception table. 208 ExceptionTable exc_table(me); 209 210 // Allocate one extra spot in our list of exceptions. This 211 // last entry will be used to represent the possibility that 212 // an exception escapes the method. See ciExceptionHandlerStream 213 // for details. 214 _exception_handlers = 215 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 216 * (_handler_count + 1)); 217 if (_handler_count > 0) { 218 for (int i=0; i<_handler_count; i++) { 219 _exception_handlers[i] = new (arena) ciExceptionHandler( 220 holder(), 221 /* start */ exc_table.start_pc(i), 222 /* limit */ exc_table.end_pc(i), 223 /* goto pc */ exc_table.handler_pc(i), 224 /* cp index */ exc_table.catch_type_index(i)); 225 } 226 } 227 228 // Put an entry at the end of our list to represent the possibility 229 // of exceptional exit. 230 _exception_handlers[_handler_count] = 231 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 232 233 if (CIPrintMethodCodes) { 234 print_codes(); 235 } 236 } 237 238 239 // ------------------------------------------------------------------ 240 // ciMethod::has_linenumber_table 241 // 242 // length unknown until decompression 243 bool ciMethod::has_linenumber_table() const { 244 check_is_loaded(); 245 VM_ENTRY_MARK; 246 return get_Method()->has_linenumber_table(); 247 } 248 249 250 // ------------------------------------------------------------------ 251 // ciMethod::compressed_linenumber_table 252 u_char* ciMethod::compressed_linenumber_table() const { 253 check_is_loaded(); 254 VM_ENTRY_MARK; 255 return get_Method()->compressed_linenumber_table(); 256 } 257 258 259 // ------------------------------------------------------------------ 260 // ciMethod::line_number_from_bci 261 int ciMethod::line_number_from_bci(int bci) const { 262 check_is_loaded(); 263 VM_ENTRY_MARK; 264 return get_Method()->line_number_from_bci(bci); 265 } 266 267 268 // ------------------------------------------------------------------ 269 // ciMethod::vtable_index 270 // 271 // Get the position of this method's entry in the vtable, if any. 272 int ciMethod::vtable_index() { 273 check_is_loaded(); 274 assert(holder()->is_linked(), "must be linked"); 275 VM_ENTRY_MARK; 276 return get_Method()->vtable_index(); 277 } 278 279 280 #ifdef SHARK 281 // ------------------------------------------------------------------ 282 // ciMethod::itable_index 283 // 284 // Get the position of this method's entry in the itable, if any. 285 int ciMethod::itable_index() { 286 check_is_loaded(); 287 assert(holder()->is_linked(), "must be linked"); 288 VM_ENTRY_MARK; 289 Method* m = get_Method(); 290 if (!m->has_itable_index()) 291 return Method::nonvirtual_vtable_index; 292 return m->itable_index(); 293 } 294 #endif // SHARK 295 296 297 // ------------------------------------------------------------------ 298 // ciMethod::native_entry 299 // 300 // Get the address of this method's native code, if any. 301 address ciMethod::native_entry() { 302 check_is_loaded(); 303 assert(flags().is_native(), "must be native method"); 304 VM_ENTRY_MARK; 305 Method* method = get_Method(); 306 address entry = method->native_function(); 307 assert(entry != NULL, "must be valid entry point"); 308 return entry; 309 } 310 311 312 // ------------------------------------------------------------------ 313 // ciMethod::interpreter_entry 314 // 315 // Get the entry point for running this method in the interpreter. 316 address ciMethod::interpreter_entry() { 317 check_is_loaded(); 318 VM_ENTRY_MARK; 319 methodHandle mh(THREAD, get_Method()); 320 return Interpreter::entry_for_method(mh); 321 } 322 323 324 // ------------------------------------------------------------------ 325 // ciMethod::uses_balanced_monitors 326 // 327 // Does this method use monitors in a strict stack-disciplined manner? 328 bool ciMethod::has_balanced_monitors() { 329 check_is_loaded(); 330 if (_balanced_monitors) return true; 331 332 // Analyze the method to see if monitors are used properly. 333 VM_ENTRY_MARK; 334 methodHandle method(THREAD, get_Method()); 335 assert(method->has_monitor_bytecodes(), "should have checked this"); 336 337 // Check to see if a previous compilation computed the 338 // monitor-matching analysis. 339 if (method->guaranteed_monitor_matching()) { 340 _balanced_monitors = true; 341 return true; 342 } 343 344 { 345 EXCEPTION_MARK; 346 ResourceMark rm(THREAD); 347 GeneratePairingInfo gpi(method); 348 gpi.compute_map(CATCH); 349 if (!gpi.monitor_safe()) { 350 return false; 351 } 352 method->set_guaranteed_monitor_matching(); 353 _balanced_monitors = true; 354 } 355 return true; 356 } 357 358 359 // ------------------------------------------------------------------ 360 // ciMethod::get_flow_analysis 361 ciTypeFlow* ciMethod::get_flow_analysis() { 362 #if defined(COMPILER2) || defined(SHARK) 363 if (_flow == NULL) { 364 ciEnv* env = CURRENT_ENV; 365 _flow = new (env->arena()) ciTypeFlow(env, this); 366 _flow->do_flow(); 367 } 368 return _flow; 369 #else // COMPILER2 || SHARK 370 ShouldNotReachHere(); 371 return NULL; 372 #endif // COMPILER2 || SHARK 373 } 374 375 376 // ------------------------------------------------------------------ 377 // ciMethod::get_osr_flow_analysis 378 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 379 #if defined(COMPILER2) || defined(SHARK) 380 // OSR entry points are always place after a call bytecode of some sort 381 assert(osr_bci >= 0, "must supply valid OSR entry point"); 382 ciEnv* env = CURRENT_ENV; 383 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 384 flow->do_flow(); 385 return flow; 386 #else // COMPILER2 || SHARK 387 ShouldNotReachHere(); 388 return NULL; 389 #endif // COMPILER2 || SHARK 390 } 391 392 // ------------------------------------------------------------------ 393 // ciMethod::raw_liveness_at_bci 394 // 395 // Which local variables are live at a specific bci? 396 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 397 check_is_loaded(); 398 if (_liveness == NULL) { 399 // Create the liveness analyzer. 400 Arena* arena = CURRENT_ENV->arena(); 401 _liveness = new (arena) MethodLiveness(arena, this); 402 _liveness->compute_liveness(); 403 } 404 return _liveness->get_liveness_at(bci); 405 } 406 407 // ------------------------------------------------------------------ 408 // ciMethod::liveness_at_bci 409 // 410 // Which local variables are live at a specific bci? When debugging 411 // will return true for all locals in some cases to improve debug 412 // information. 413 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 414 MethodLivenessResult result = raw_liveness_at_bci(bci); 415 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { 416 // Keep all locals live for the user's edification and amusement. 417 result.at_put_range(0, result.size(), true); 418 } 419 return result; 420 } 421 422 // ciMethod::live_local_oops_at_bci 423 // 424 // find all the live oops in the locals array for a particular bci 425 // Compute what the interpreter believes by using the interpreter 426 // oopmap generator. This is used as a double check during osr to 427 // guard against conservative result from MethodLiveness making us 428 // think a dead oop is live. MethodLiveness is conservative in the 429 // sense that it may consider locals to be live which cannot be live, 430 // like in the case where a local could contain an oop or a primitive 431 // along different paths. In that case the local must be dead when 432 // those paths merge. Since the interpreter's viewpoint is used when 433 // gc'ing an interpreter frame we need to use its viewpoint during 434 // OSR when loading the locals. 435 436 BitMap ciMethod::live_local_oops_at_bci(int bci) { 437 VM_ENTRY_MARK; 438 InterpreterOopMap mask; 439 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 440 int mask_size = max_locals(); 441 BitMap result(mask_size); 442 result.clear(); 443 int i; 444 for (i = 0; i < mask_size ; i++ ) { 445 if (mask.is_oop(i)) result.set_bit(i); 446 } 447 return result; 448 } 449 450 451 #ifdef COMPILER1 452 // ------------------------------------------------------------------ 453 // ciMethod::bci_block_start 454 // 455 // Marks all bcis where a new basic block starts 456 const BitMap ciMethod::bci_block_start() { 457 check_is_loaded(); 458 if (_liveness == NULL) { 459 // Create the liveness analyzer. 460 Arena* arena = CURRENT_ENV->arena(); 461 _liveness = new (arena) MethodLiveness(arena, this); 462 _liveness->compute_liveness(); 463 } 464 465 return _liveness->get_bci_block_start(); 466 } 467 #endif // COMPILER1 468 469 470 // ------------------------------------------------------------------ 471 // ciMethod::call_profile_at_bci 472 // 473 // Get the ciCallProfile for the invocation of this method. 474 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 475 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 476 ResourceMark rm; 477 ciCallProfile result; 478 if (method_data() != NULL && method_data()->is_mature()) { 479 ciProfileData* data = method_data()->bci_to_data(bci); 480 if (data != NULL && data->is_CounterData()) { 481 // Every profiled call site has a counter. 482 int count = data->as_CounterData()->count(); 483 484 if (!data->is_ReceiverTypeData()) { 485 result._receiver_count[0] = 0; // that's a definite zero 486 } else { // ReceiverTypeData is a subclass of CounterData 487 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 488 // In addition, virtual call sites have receiver type information 489 int receivers_count_total = 0; 490 int morphism = 0; 491 // Precompute morphism for the possible fixup 492 for (uint i = 0; i < call->row_limit(); i++) { 493 ciKlass* receiver = call->receiver(i); 494 if (receiver == NULL) continue; 495 morphism++; 496 } 497 int epsilon = 0; 498 if (TieredCompilation && ProfileInterpreter) { 499 // Interpreter and C1 treat final and special invokes differently. 500 // C1 will record a type, whereas the interpreter will just 501 // increment the count. Detect this case. 502 if (morphism == 1 && count > 0) { 503 epsilon = count; 504 count = 0; 505 } 506 } 507 for (uint i = 0; i < call->row_limit(); i++) { 508 ciKlass* receiver = call->receiver(i); 509 if (receiver == NULL) continue; 510 int rcount = call->receiver_count(i) + epsilon; 511 if (rcount == 0) rcount = 1; // Should be valid value 512 receivers_count_total += rcount; 513 // Add the receiver to result data. 514 result.add_receiver(receiver, rcount); 515 // If we extend profiling to record methods, 516 // we will set result._method also. 517 } 518 // Determine call site's morphism. 519 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 520 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 521 // The call site count is > 0 in the case of a polymorphic virtual call. 522 if (morphism > 0 && morphism == result._limit) { 523 // The morphism <= MorphismLimit. 524 if ((morphism < ciCallProfile::MorphismLimit) || 525 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 526 #ifdef ASSERT 527 if (count > 0) { 528 this->print_short_name(tty); 529 tty->print_cr(" @ bci:%d", bci); 530 this->print_codes(); 531 assert(false, "this call site should not be polymorphic"); 532 } 533 #endif 534 result._morphism = morphism; 535 } 536 } 537 // Make the count consistent if this is a call profile. If count is 538 // zero or less, presume that this is a typecheck profile and 539 // do nothing. Otherwise, increase count to be the sum of all 540 // receiver's counts. 541 if (count >= 0) { 542 count += receivers_count_total; 543 } 544 } 545 result._count = count; 546 } 547 } 548 return result; 549 } 550 551 // ------------------------------------------------------------------ 552 // Add new receiver and sort data by receiver's profile count. 553 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 554 // Add new receiver and sort data by receiver's counts when we have space 555 // for it otherwise replace the less called receiver (less called receiver 556 // is placed to the last array element which is not used). 557 // First array's element contains most called receiver. 558 int i = _limit; 559 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 560 _receiver[i] = _receiver[i-1]; 561 _receiver_count[i] = _receiver_count[i-1]; 562 } 563 _receiver[i] = receiver; 564 _receiver_count[i] = receiver_count; 565 if (_limit < MorphismLimit) _limit++; 566 } 567 568 569 void ciMethod::assert_virtual_call_type_ok(int bci) { 570 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 571 java_code_at_bci(bci) == Bytecodes::_invokeinterface, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); 572 } 573 574 void ciMethod::assert_call_type_ok(int bci) { 575 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 576 java_code_at_bci(bci) == Bytecodes::_invokespecial || 577 java_code_at_bci(bci) == Bytecodes::_invokedynamic, err_msg("unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci)))); 578 } 579 580 /** 581 * Check whether profiling provides a type for the argument i to the 582 * call at bci bci 583 * 584 * @param bci bci of the call 585 * @param i argument number 586 * @return profiled type 587 * 588 * If the profile reports that the argument may be null, return false 589 * at least for now. 590 */ 591 ciKlass* ciMethod::argument_profiled_type(int bci, int i) { 592 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 593 ciProfileData* data = method_data()->bci_to_data(bci); 594 if (data != NULL) { 595 if (data->is_VirtualCallTypeData()) { 596 assert_virtual_call_type_ok(bci); 597 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 598 if (i >= call->number_of_arguments()) { 599 return NULL; 600 } 601 ciKlass* type = call->valid_argument_type(i); 602 if (type != NULL && !call->argument_maybe_null(i)) { 603 return type; 604 } 605 } else if (data->is_CallTypeData()) { 606 assert_call_type_ok(bci); 607 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 608 if (i >= call->number_of_arguments()) { 609 return NULL; 610 } 611 ciKlass* type = call->valid_argument_type(i); 612 if (type != NULL && !call->argument_maybe_null(i)) { 613 return type; 614 } 615 } 616 } 617 } 618 return NULL; 619 } 620 621 /** 622 * Check whether profiling provides a type for the return value from 623 * the call at bci bci 624 * 625 * @param bci bci of the call 626 * @return profiled type 627 * 628 * If the profile reports that the argument may be null, return false 629 * at least for now. 630 */ 631 ciKlass* ciMethod::return_profiled_type(int bci) { 632 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 633 ciProfileData* data = method_data()->bci_to_data(bci); 634 if (data != NULL) { 635 if (data->is_VirtualCallTypeData()) { 636 assert_virtual_call_type_ok(bci); 637 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 638 ciKlass* type = call->valid_return_type(); 639 if (type != NULL && !call->return_maybe_null()) { 640 return type; 641 } 642 } else if (data->is_CallTypeData()) { 643 assert_call_type_ok(bci); 644 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 645 ciKlass* type = call->valid_return_type(); 646 if (type != NULL && !call->return_maybe_null()) { 647 return type; 648 } 649 } 650 } 651 } 652 return NULL; 653 } 654 655 /** 656 * Check whether profiling provides a type for the parameter i 657 * 658 * @param i parameter number 659 * @return profiled type 660 * 661 * If the profile reports that the argument may be null, return false 662 * at least for now. 663 */ 664 ciKlass* ciMethod::parameter_profiled_type(int i) { 665 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 666 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 667 if (parameters != NULL && i < parameters->number_of_parameters()) { 668 ciKlass* type = parameters->valid_parameter_type(i); 669 if (type != NULL && !parameters->parameter_maybe_null(i)) { 670 return type; 671 } 672 } 673 } 674 return NULL; 675 } 676 677 678 // ------------------------------------------------------------------ 679 // ciMethod::find_monomorphic_target 680 // 681 // Given a certain calling environment, find the monomorphic target 682 // for the call. Return NULL if the call is not monomorphic in 683 // its calling environment, or if there are only abstract methods. 684 // The returned method is never abstract. 685 // Note: If caller uses a non-null result, it must inform dependencies 686 // via assert_unique_concrete_method or assert_leaf_type. 687 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 688 ciInstanceKlass* callee_holder, 689 ciInstanceKlass* actual_recv) { 690 check_is_loaded(); 691 692 if (actual_recv->is_interface()) { 693 // %%% We cannot trust interface types, yet. See bug 6312651. 694 return NULL; 695 } 696 697 ciMethod* root_m = resolve_invoke(caller, actual_recv); 698 if (root_m == NULL) { 699 // Something went wrong looking up the actual receiver method. 700 return NULL; 701 } 702 assert(!root_m->is_abstract(), "resolve_invoke promise"); 703 704 // Make certain quick checks even if UseCHA is false. 705 706 // Is it private or final? 707 if (root_m->can_be_statically_bound()) { 708 return root_m; 709 } 710 711 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 712 // Easy case. There is no other place to put a method, so don't bother 713 // to go through the VM_ENTRY_MARK and all the rest. 714 return root_m; 715 } 716 717 // Array methods (clone, hashCode, etc.) are always statically bound. 718 // If we were to see an array type here, we'd return root_m. 719 // However, this method processes only ciInstanceKlasses. (See 4962591.) 720 // The inline_native_clone intrinsic narrows Object to T[] properly, 721 // so there is no need to do the same job here. 722 723 if (!UseCHA) return NULL; 724 725 VM_ENTRY_MARK; 726 727 // Disable CHA for default methods for now 728 if (root_m->get_Method()->is_default_method()) { 729 return NULL; 730 } 731 732 methodHandle target; 733 { 734 MutexLocker locker(Compile_lock); 735 Klass* context = actual_recv->get_Klass(); 736 target = Dependencies::find_unique_concrete_method(context, 737 root_m->get_Method()); 738 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 739 } 740 741 #ifndef PRODUCT 742 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 743 tty->print("found a non-root unique target method"); 744 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); 745 tty->print(" method = "); 746 target->print_short_name(tty); 747 tty->cr(); 748 } 749 #endif //PRODUCT 750 751 if (target() == NULL) { 752 return NULL; 753 } 754 if (target() == root_m->get_Method()) { 755 return root_m; 756 } 757 if (!root_m->is_public() && 758 !root_m->is_protected()) { 759 // If we are going to reason about inheritance, it's easiest 760 // if the method in question is public, protected, or private. 761 // If the answer is not root_m, it is conservatively correct 762 // to return NULL, even if the CHA encountered irrelevant 763 // methods in other packages. 764 // %%% TO DO: Work out logic for package-private methods 765 // with the same name but different vtable indexes. 766 return NULL; 767 } 768 return CURRENT_THREAD_ENV->get_method(target()); 769 } 770 771 // ------------------------------------------------------------------ 772 // ciMethod::resolve_invoke 773 // 774 // Given a known receiver klass, find the target for the call. 775 // Return NULL if the call has no target or the target is abstract. 776 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { 777 check_is_loaded(); 778 VM_ENTRY_MARK; 779 780 KlassHandle caller_klass (THREAD, caller->get_Klass()); 781 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 782 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 783 Symbol* h_name = name()->get_symbol(); 784 Symbol* h_signature = signature()->get_symbol(); 785 786 methodHandle m; 787 // Only do exact lookup if receiver klass has been linked. Otherwise, 788 // the vtable has not been setup, and the LinkResolver will fail. 789 if (h_recv->oop_is_array() 790 || 791 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 792 if (holder()->is_interface()) { 793 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 794 } else { 795 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 796 } 797 } 798 799 if (m.is_null()) { 800 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 801 return NULL; 802 } 803 804 ciMethod* result = this; 805 if (m() != get_Method()) { 806 result = CURRENT_THREAD_ENV->get_method(m()); 807 } 808 809 // Don't return abstract methods because they aren't 810 // optimizable or interesting. 811 if (result->is_abstract()) { 812 return NULL; 813 } else { 814 return result; 815 } 816 } 817 818 // ------------------------------------------------------------------ 819 // ciMethod::resolve_vtable_index 820 // 821 // Given a known receiver klass, find the vtable index for the call. 822 // Return Method::invalid_vtable_index if the vtable_index is unknown. 823 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 824 check_is_loaded(); 825 826 int vtable_index = Method::invalid_vtable_index; 827 // Only do lookup if receiver klass has been linked. Otherwise, 828 // the vtable has not been setup, and the LinkResolver will fail. 829 if (!receiver->is_interface() 830 && (!receiver->is_instance_klass() || 831 receiver->as_instance_klass()->is_linked())) { 832 VM_ENTRY_MARK; 833 834 KlassHandle caller_klass (THREAD, caller->get_Klass()); 835 KlassHandle h_recv (THREAD, receiver->get_Klass()); 836 Symbol* h_name = name()->get_symbol(); 837 Symbol* h_signature = signature()->get_symbol(); 838 839 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); 840 if (vtable_index == Method::nonvirtual_vtable_index) { 841 // A statically bound method. Return "no such index". 842 vtable_index = Method::invalid_vtable_index; 843 } 844 } 845 846 return vtable_index; 847 } 848 849 // ------------------------------------------------------------------ 850 // ciMethod::interpreter_call_site_count 851 int ciMethod::interpreter_call_site_count(int bci) { 852 if (method_data() != NULL) { 853 ResourceMark rm; 854 ciProfileData* data = method_data()->bci_to_data(bci); 855 if (data != NULL && data->is_CounterData()) { 856 return scale_count(data->as_CounterData()->count()); 857 } 858 } 859 return -1; // unknown 860 } 861 862 // ------------------------------------------------------------------ 863 // ciMethod::get_field_at_bci 864 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 865 ciBytecodeStream iter(this); 866 iter.reset_to_bci(bci); 867 iter.next(); 868 return iter.get_field(will_link); 869 } 870 871 // ------------------------------------------------------------------ 872 // ciMethod::get_method_at_bci 873 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 874 ciBytecodeStream iter(this); 875 iter.reset_to_bci(bci); 876 iter.next(); 877 return iter.get_method(will_link, declared_signature); 878 } 879 880 // ------------------------------------------------------------------ 881 // Adjust a CounterData count to be commensurate with 882 // interpreter_invocation_count. If the MDO exists for 883 // only 25% of the time the method exists, then the 884 // counts in the MDO should be scaled by 4X, so that 885 // they can be usefully and stably compared against the 886 // invocation counts in methods. 887 int ciMethod::scale_count(int count, float prof_factor) { 888 if (count > 0 && method_data() != NULL) { 889 int counter_life; 890 int method_life = interpreter_invocation_count(); 891 if (TieredCompilation) { 892 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 893 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 894 } else { 895 int current_mileage = method_data()->current_mileage(); 896 int creation_mileage = method_data()->creation_mileage(); 897 counter_life = current_mileage - creation_mileage; 898 } 899 900 // counter_life due to backedge_counter could be > method_life 901 if (counter_life > method_life) 902 counter_life = method_life; 903 if (0 < counter_life && counter_life <= method_life) { 904 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 905 count = (count > 0) ? count : 1; 906 } 907 } 908 return count; 909 } 910 911 912 // ------------------------------------------------------------------ 913 // ciMethod::is_special_get_caller_class_method 914 // 915 bool ciMethod::is_ignored_by_security_stack_walk() const { 916 check_is_loaded(); 917 VM_ENTRY_MARK; 918 return get_Method()->is_ignored_by_security_stack_walk(); 919 } 920 921 922 // ------------------------------------------------------------------ 923 // invokedynamic support 924 925 // ------------------------------------------------------------------ 926 // ciMethod::is_method_handle_intrinsic 927 // 928 // Return true if the method is an instance of the JVM-generated 929 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 930 bool ciMethod::is_method_handle_intrinsic() const { 931 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 932 return (MethodHandles::is_signature_polymorphic(iid) && 933 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 934 } 935 936 // ------------------------------------------------------------------ 937 // ciMethod::is_compiled_lambda_form 938 // 939 // Return true if the method is a generated MethodHandle adapter. 940 // These are built by Java code. 941 bool ciMethod::is_compiled_lambda_form() const { 942 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 943 return iid == vmIntrinsics::_compiledLambdaForm; 944 } 945 946 // ------------------------------------------------------------------ 947 // ciMethod::has_member_arg 948 // 949 // Return true if the method is a linker intrinsic like _linkToVirtual. 950 // These are built by the JVM. 951 bool ciMethod::has_member_arg() const { 952 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 953 return (MethodHandles::is_signature_polymorphic(iid) && 954 MethodHandles::has_member_arg(iid)); 955 } 956 957 // ------------------------------------------------------------------ 958 // ciMethod::ensure_method_data 959 // 960 // Generate new MethodData* objects at compile time. 961 // Return true if allocation was successful or no MDO is required. 962 bool ciMethod::ensure_method_data(methodHandle h_m) { 963 EXCEPTION_CONTEXT; 964 if (is_native() || is_abstract() || h_m()->is_accessor()) { 965 return true; 966 } 967 if (h_m()->method_data() == NULL) { 968 Method::build_interpreter_method_data(h_m, THREAD); 969 if (HAS_PENDING_EXCEPTION) { 970 CLEAR_PENDING_EXCEPTION; 971 } 972 } 973 if (h_m()->method_data() != NULL) { 974 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 975 _method_data->load_data(); 976 return true; 977 } else { 978 _method_data = CURRENT_ENV->get_empty_methodData(); 979 return false; 980 } 981 } 982 983 // public, retroactive version 984 bool ciMethod::ensure_method_data() { 985 bool result = true; 986 if (_method_data == NULL || _method_data->is_empty()) { 987 GUARDED_VM_ENTRY({ 988 result = ensure_method_data(get_Method()); 989 }); 990 } 991 return result; 992 } 993 994 995 // ------------------------------------------------------------------ 996 // ciMethod::method_data 997 // 998 ciMethodData* ciMethod::method_data() { 999 if (_method_data != NULL) { 1000 return _method_data; 1001 } 1002 VM_ENTRY_MARK; 1003 ciEnv* env = CURRENT_ENV; 1004 Thread* my_thread = JavaThread::current(); 1005 methodHandle h_m(my_thread, get_Method()); 1006 1007 if (h_m()->method_data() != NULL) { 1008 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1009 _method_data->load_data(); 1010 } else { 1011 _method_data = CURRENT_ENV->get_empty_methodData(); 1012 } 1013 return _method_data; 1014 1015 } 1016 1017 // ------------------------------------------------------------------ 1018 // ciMethod::method_data_or_null 1019 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1020 // NULL otherwise. 1021 ciMethodData* ciMethod::method_data_or_null() { 1022 ciMethodData *md = method_data(); 1023 if (md->is_empty()) { 1024 return NULL; 1025 } 1026 return md; 1027 } 1028 1029 // ------------------------------------------------------------------ 1030 // ciMethod::ensure_method_counters 1031 // 1032 MethodCounters* ciMethod::ensure_method_counters() { 1033 check_is_loaded(); 1034 VM_ENTRY_MARK; 1035 methodHandle mh(THREAD, get_Method()); 1036 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1037 return method_counters; 1038 } 1039 1040 // ------------------------------------------------------------------ 1041 // ciMethod::should_exclude 1042 // 1043 // Should this method be excluded from compilation? 1044 bool ciMethod::should_exclude() { 1045 check_is_loaded(); 1046 VM_ENTRY_MARK; 1047 methodHandle mh(THREAD, get_Method()); 1048 bool ignore; 1049 return CompilerOracle::should_exclude(mh, ignore); 1050 } 1051 1052 // ------------------------------------------------------------------ 1053 // ciMethod::should_inline 1054 // 1055 // Should this method be inlined during compilation? 1056 bool ciMethod::should_inline() { 1057 check_is_loaded(); 1058 VM_ENTRY_MARK; 1059 methodHandle mh(THREAD, get_Method()); 1060 return CompilerOracle::should_inline(mh); 1061 } 1062 1063 // ------------------------------------------------------------------ 1064 // ciMethod::should_not_inline 1065 // 1066 // Should this method be disallowed from inlining during compilation? 1067 bool ciMethod::should_not_inline() { 1068 check_is_loaded(); 1069 VM_ENTRY_MARK; 1070 methodHandle mh(THREAD, get_Method()); 1071 return CompilerOracle::should_not_inline(mh); 1072 } 1073 1074 // ------------------------------------------------------------------ 1075 // ciMethod::should_print_assembly 1076 // 1077 // Should the compiler print the generated code for this method? 1078 bool ciMethod::should_print_assembly() { 1079 check_is_loaded(); 1080 VM_ENTRY_MARK; 1081 methodHandle mh(THREAD, get_Method()); 1082 return CompilerOracle::should_print(mh); 1083 } 1084 1085 // ------------------------------------------------------------------ 1086 // ciMethod::break_at_execute 1087 // 1088 // Should the compiler insert a breakpoint into the generated code 1089 // method? 1090 bool ciMethod::break_at_execute() { 1091 check_is_loaded(); 1092 VM_ENTRY_MARK; 1093 methodHandle mh(THREAD, get_Method()); 1094 return CompilerOracle::should_break_at(mh); 1095 } 1096 1097 // ------------------------------------------------------------------ 1098 // ciMethod::has_option 1099 // 1100 bool ciMethod::has_option(const char* option) { 1101 check_is_loaded(); 1102 VM_ENTRY_MARK; 1103 methodHandle mh(THREAD, get_Method()); 1104 return CompilerOracle::has_option_string(mh, option); 1105 } 1106 1107 // ------------------------------------------------------------------ 1108 // ciMethod::can_be_compiled 1109 // 1110 // Have previous compilations of this method succeeded? 1111 bool ciMethod::can_be_compiled() { 1112 check_is_loaded(); 1113 ciEnv* env = CURRENT_ENV; 1114 if (is_c1_compile(env->comp_level())) { 1115 return _is_c1_compilable; 1116 } 1117 return _is_c2_compilable; 1118 } 1119 1120 // ------------------------------------------------------------------ 1121 // ciMethod::set_not_compilable 1122 // 1123 // Tell the VM that this method cannot be compiled at all. 1124 void ciMethod::set_not_compilable(const char* reason) { 1125 check_is_loaded(); 1126 VM_ENTRY_MARK; 1127 ciEnv* env = CURRENT_ENV; 1128 if (is_c1_compile(env->comp_level())) { 1129 _is_c1_compilable = false; 1130 } else { 1131 _is_c2_compilable = false; 1132 } 1133 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1134 } 1135 1136 // ------------------------------------------------------------------ 1137 // ciMethod::can_be_osr_compiled 1138 // 1139 // Have previous compilations of this method succeeded? 1140 // 1141 // Implementation note: the VM does not currently keep track 1142 // of failed OSR compilations per bci. The entry_bci parameter 1143 // is currently unused. 1144 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1145 check_is_loaded(); 1146 VM_ENTRY_MARK; 1147 ciEnv* env = CURRENT_ENV; 1148 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1149 } 1150 1151 // ------------------------------------------------------------------ 1152 // ciMethod::has_compiled_code 1153 bool ciMethod::has_compiled_code() { 1154 return instructions_size() > 0; 1155 } 1156 1157 int ciMethod::comp_level() { 1158 check_is_loaded(); 1159 VM_ENTRY_MARK; 1160 nmethod* nm = get_Method()->code(); 1161 if (nm != NULL) return nm->comp_level(); 1162 return 0; 1163 } 1164 1165 int ciMethod::highest_osr_comp_level() { 1166 check_is_loaded(); 1167 VM_ENTRY_MARK; 1168 return get_Method()->highest_osr_comp_level(); 1169 } 1170 1171 // ------------------------------------------------------------------ 1172 // ciMethod::code_size_for_inlining 1173 // 1174 // Code size for inlining decisions. This method returns a code 1175 // size of 1 for methods which has the ForceInline annotation. 1176 int ciMethod::code_size_for_inlining() { 1177 check_is_loaded(); 1178 if (get_Method()->force_inline()) { 1179 return 1; 1180 } 1181 return code_size(); 1182 } 1183 1184 // ------------------------------------------------------------------ 1185 // ciMethod::instructions_size 1186 // 1187 // This is a rough metric for "fat" methods, compared before inlining 1188 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1189 // junk like exception handler, stubs, and constant table, which are 1190 // not highly relevant to an inlined method. So we use the more 1191 // specific accessor nmethod::insts_size. 1192 int ciMethod::instructions_size() { 1193 if (_instructions_size == -1) { 1194 GUARDED_VM_ENTRY( 1195 nmethod* code = get_Method()->code(); 1196 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1197 _instructions_size = code->insts_end() - code->verified_entry_point(); 1198 } else { 1199 _instructions_size = 0; 1200 } 1201 ); 1202 } 1203 return _instructions_size; 1204 } 1205 1206 // ------------------------------------------------------------------ 1207 // ciMethod::log_nmethod_identity 1208 void ciMethod::log_nmethod_identity(xmlStream* log) { 1209 GUARDED_VM_ENTRY( 1210 nmethod* code = get_Method()->code(); 1211 if (code != NULL) { 1212 code->log_identity(log); 1213 } 1214 ) 1215 } 1216 1217 // ------------------------------------------------------------------ 1218 // ciMethod::is_not_reached 1219 bool ciMethod::is_not_reached(int bci) { 1220 check_is_loaded(); 1221 VM_ENTRY_MARK; 1222 return Interpreter::is_not_reached( 1223 methodHandle(THREAD, get_Method()), bci); 1224 } 1225 1226 // ------------------------------------------------------------------ 1227 // ciMethod::was_never_executed 1228 bool ciMethod::was_executed_more_than(int times) { 1229 VM_ENTRY_MARK; 1230 return get_Method()->was_executed_more_than(times); 1231 } 1232 1233 // ------------------------------------------------------------------ 1234 // ciMethod::has_unloaded_classes_in_signature 1235 bool ciMethod::has_unloaded_classes_in_signature() { 1236 VM_ENTRY_MARK; 1237 { 1238 EXCEPTION_MARK; 1239 methodHandle m(THREAD, get_Method()); 1240 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1241 if( HAS_PENDING_EXCEPTION ) { 1242 CLEAR_PENDING_EXCEPTION; 1243 return true; // Declare that we may have unloaded classes 1244 } 1245 return has_unloaded; 1246 } 1247 } 1248 1249 // ------------------------------------------------------------------ 1250 // ciMethod::is_klass_loaded 1251 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1252 VM_ENTRY_MARK; 1253 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1254 } 1255 1256 // ------------------------------------------------------------------ 1257 // ciMethod::check_call 1258 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1259 // This method is used only in C2 from InlineTree::ok_to_inline, 1260 // and is only used under -Xcomp or -XX:CompileTheWorld. 1261 // It appears to fail when applied to an invokeinterface call site. 1262 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1263 VM_ENTRY_MARK; 1264 { 1265 EXCEPTION_MARK; 1266 HandleMark hm(THREAD); 1267 constantPoolHandle pool (THREAD, get_Method()->constants()); 1268 methodHandle spec_method; 1269 KlassHandle spec_klass; 1270 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1271 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); 1272 if (HAS_PENDING_EXCEPTION) { 1273 CLEAR_PENDING_EXCEPTION; 1274 return false; 1275 } else { 1276 return (spec_method->is_static() == is_static); 1277 } 1278 } 1279 return false; 1280 } 1281 1282 // ------------------------------------------------------------------ 1283 // ciMethod::print_codes 1284 // 1285 // Print the bytecodes for this method. 1286 void ciMethod::print_codes_on(outputStream* st) { 1287 check_is_loaded(); 1288 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1289 } 1290 1291 1292 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1293 check_is_loaded(); \ 1294 VM_ENTRY_MARK; \ 1295 return get_Method()->flag_accessor(); \ 1296 } 1297 1298 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1299 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1300 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1301 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1302 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1303 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1304 1305 bool ciMethod::is_boxing_method() const { 1306 if (holder()->is_box_klass()) { 1307 switch (intrinsic_id()) { 1308 case vmIntrinsics::_Boolean_valueOf: 1309 case vmIntrinsics::_Byte_valueOf: 1310 case vmIntrinsics::_Character_valueOf: 1311 case vmIntrinsics::_Short_valueOf: 1312 case vmIntrinsics::_Integer_valueOf: 1313 case vmIntrinsics::_Long_valueOf: 1314 case vmIntrinsics::_Float_valueOf: 1315 case vmIntrinsics::_Double_valueOf: 1316 return true; 1317 default: 1318 return false; 1319 } 1320 } 1321 return false; 1322 } 1323 1324 bool ciMethod::is_unboxing_method() const { 1325 if (holder()->is_box_klass()) { 1326 switch (intrinsic_id()) { 1327 case vmIntrinsics::_booleanValue: 1328 case vmIntrinsics::_byteValue: 1329 case vmIntrinsics::_charValue: 1330 case vmIntrinsics::_shortValue: 1331 case vmIntrinsics::_intValue: 1332 case vmIntrinsics::_longValue: 1333 case vmIntrinsics::_floatValue: 1334 case vmIntrinsics::_doubleValue: 1335 return true; 1336 default: 1337 return false; 1338 } 1339 } 1340 return false; 1341 } 1342 1343 BCEscapeAnalyzer *ciMethod::get_bcea() { 1344 #ifdef COMPILER2 1345 if (_bcea == NULL) { 1346 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1347 } 1348 return _bcea; 1349 #else // COMPILER2 1350 ShouldNotReachHere(); 1351 return NULL; 1352 #endif // COMPILER2 1353 } 1354 1355 ciMethodBlocks *ciMethod::get_method_blocks() { 1356 Arena *arena = CURRENT_ENV->arena(); 1357 if (_method_blocks == NULL) { 1358 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1359 } 1360 return _method_blocks; 1361 } 1362 1363 #undef FETCH_FLAG_FROM_VM 1364 1365 void ciMethod::dump_name_as_ascii(outputStream* st) { 1366 Method* method = get_Method(); 1367 st->print("%s %s %s", 1368 method->klass_name()->as_quoted_ascii(), 1369 method->name()->as_quoted_ascii(), 1370 method->signature()->as_quoted_ascii()); 1371 } 1372 1373 void ciMethod::dump_replay_data(outputStream* st) { 1374 ResourceMark rm; 1375 Method* method = get_Method(); 1376 MethodCounters* mcs = method->method_counters(); 1377 st->print("ciMethod "); 1378 dump_name_as_ascii(st); 1379 st->print_cr(" %d %d %d %d %d", 1380 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1381 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1382 interpreter_invocation_count(), 1383 interpreter_throwout_count(), 1384 _instructions_size); 1385 } 1386 1387 // ------------------------------------------------------------------ 1388 // ciMethod::print_codes 1389 // 1390 // Print a range of the bytecodes for this method. 1391 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1392 check_is_loaded(); 1393 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1394 } 1395 1396 // ------------------------------------------------------------------ 1397 // ciMethod::print_name 1398 // 1399 // Print the name of this method, including signature and some flags. 1400 void ciMethod::print_name(outputStream* st) { 1401 check_is_loaded(); 1402 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1403 } 1404 1405 // ------------------------------------------------------------------ 1406 // ciMethod::print_short_name 1407 // 1408 // Print the name of this method, without signature. 1409 void ciMethod::print_short_name(outputStream* st) { 1410 if (is_loaded()) { 1411 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1412 } else { 1413 // Fall back if method is not loaded. 1414 holder()->print_name_on(st); 1415 st->print("::"); 1416 name()->print_symbol_on(st); 1417 if (WizardMode) 1418 signature()->as_symbol()->print_symbol_on(st); 1419 } 1420 } 1421 1422 // ------------------------------------------------------------------ 1423 // ciMethod::print_impl 1424 // 1425 // Implementation of the print method. 1426 void ciMethod::print_impl(outputStream* st) { 1427 ciMetadata::print_impl(st); 1428 st->print(" name="); 1429 name()->print_symbol_on(st); 1430 st->print(" holder="); 1431 holder()->print_name_on(st); 1432 st->print(" signature="); 1433 signature()->as_symbol()->print_symbol_on(st); 1434 if (is_loaded()) { 1435 st->print(" loaded=true"); 1436 st->print(" arg_size=%d", arg_size()); 1437 st->print(" flags="); 1438 flags().print_member_flags(st); 1439 } else { 1440 st->print(" loaded=false"); 1441 } 1442 }