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