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