1 /* 2 * Copyright (c) 1999, 2015, 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 if (LogTouchedMethods) { 79 h_m()->log_touched(Thread::current()); 80 } 81 // These fields are always filled in in loaded methods. 82 _flags = ciFlags(h_m()->access_flags()); 83 84 // Easy to compute, so fill them in now. 85 _max_stack = h_m()->max_stack(); 86 _max_locals = h_m()->max_locals(); 87 _code_size = h_m()->code_size(); 88 _intrinsic_id = h_m()->intrinsic_id(); 89 _handler_count = h_m()->exception_table_length(); 90 _size_of_parameters = h_m()->size_of_parameters(); 91 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 92 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 93 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 94 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 95 // Lazy fields, filled in on demand. Require allocation. 96 _code = NULL; 97 _exception_handlers = NULL; 98 _liveness = NULL; 99 _method_blocks = NULL; 100 #if defined(COMPILER2) || defined(SHARK) 101 _flow = NULL; 102 _bcea = NULL; 103 #endif // COMPILER2 || SHARK 104 105 ciEnv *env = CURRENT_ENV; 106 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 107 // 6328518 check hotswap conditions under the right lock. 108 MutexLocker locker(Compile_lock); 109 if (Dependencies::check_evol_method(h_m()) != NULL) { 110 _is_c1_compilable = false; 111 _is_c2_compilable = false; 112 } 113 } else { 114 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 115 } 116 117 if (h_m()->method_holder()->is_linked()) { 118 _can_be_statically_bound = h_m()->can_be_statically_bound(); 119 } else { 120 // Have to use a conservative value in this case. 121 _can_be_statically_bound = false; 122 } 123 124 // Adjust the definition of this condition to be more useful: 125 // %%% take these conditions into account in vtable generation 126 if (!_can_be_statically_bound && h_m()->is_private()) 127 _can_be_statically_bound = true; 128 if (_can_be_statically_bound && h_m()->is_abstract()) 129 _can_be_statically_bound = false; 130 131 // generating _signature may allow GC and therefore move m. 132 // These fields are always filled in. 133 _name = env->get_symbol(h_m()->name()); 134 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 135 constantPoolHandle cpool = h_m()->constants(); 136 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 137 _method_data = NULL; 138 _nmethod_age = h_m()->nmethod_age(); 139 // Take a snapshot of these values, so they will be commensurate with the MDO. 140 if (ProfileInterpreter || TieredCompilation) { 141 int invcnt = h_m()->interpreter_invocation_count(); 142 // if the value overflowed report it as max int 143 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 144 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 145 } else { 146 _interpreter_invocation_count = 0; 147 _interpreter_throwout_count = 0; 148 } 149 if (_interpreter_invocation_count == 0) 150 _interpreter_invocation_count = 1; 151 _instructions_size = -1; 152 #ifdef ASSERT 153 if (ReplayCompiles) { 154 ciReplay::initialize(this); 155 } 156 #endif 157 } 158 159 160 // ------------------------------------------------------------------ 161 // ciMethod::ciMethod 162 // 163 // Unloaded method. 164 ciMethod::ciMethod(ciInstanceKlass* holder, 165 ciSymbol* name, 166 ciSymbol* signature, 167 ciInstanceKlass* accessor) : 168 ciMetadata((Metadata*)NULL), 169 _name( name), 170 _holder( holder), 171 _intrinsic_id( vmIntrinsics::_none), 172 _liveness( NULL), 173 _can_be_statically_bound(false), 174 _method_blocks( NULL), 175 _method_data( NULL) 176 #if defined(COMPILER2) || defined(SHARK) 177 , 178 _flow( NULL), 179 _bcea( NULL), 180 _instructions_size(-1) 181 #endif // COMPILER2 || SHARK 182 { 183 // Usually holder and accessor are the same type but in some cases 184 // the holder has the wrong class loader (e.g. invokedynamic call 185 // sites) so we pass the accessor. 186 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 187 } 188 189 190 // ------------------------------------------------------------------ 191 // ciMethod::load_code 192 // 193 // Load the bytecodes and exception handler table for this method. 194 void ciMethod::load_code() { 195 VM_ENTRY_MARK; 196 assert(is_loaded(), "only loaded methods have code"); 197 198 Method* me = get_Method(); 199 Arena* arena = CURRENT_THREAD_ENV->arena(); 200 201 // Load the bytecodes. 202 _code = (address)arena->Amalloc(code_size()); 203 memcpy(_code, me->code_base(), code_size()); 204 205 // Revert any breakpoint bytecodes in ci's copy 206 if (me->number_of_breakpoints() > 0) { 207 BreakpointInfo* bp = me->method_holder()->breakpoints(); 208 for (; bp != NULL; bp = bp->next()) { 209 if (bp->match(me)) { 210 code_at_put(bp->bci(), bp->orig_bytecode()); 211 } 212 } 213 } 214 215 // And load the exception table. 216 ExceptionTable exc_table(me); 217 218 // Allocate one extra spot in our list of exceptions. This 219 // last entry will be used to represent the possibility that 220 // an exception escapes the method. See ciExceptionHandlerStream 221 // for details. 222 _exception_handlers = 223 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 224 * (_handler_count + 1)); 225 if (_handler_count > 0) { 226 for (int i=0; i<_handler_count; i++) { 227 _exception_handlers[i] = new (arena) ciExceptionHandler( 228 holder(), 229 /* start */ exc_table.start_pc(i), 230 /* limit */ exc_table.end_pc(i), 231 /* goto pc */ exc_table.handler_pc(i), 232 /* cp index */ exc_table.catch_type_index(i)); 233 } 234 } 235 236 // Put an entry at the end of our list to represent the possibility 237 // of exceptional exit. 238 _exception_handlers[_handler_count] = 239 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 240 241 if (CIPrintMethodCodes) { 242 print_codes(); 243 } 244 } 245 246 247 // ------------------------------------------------------------------ 248 // ciMethod::has_linenumber_table 249 // 250 // length unknown until decompression 251 bool ciMethod::has_linenumber_table() const { 252 check_is_loaded(); 253 VM_ENTRY_MARK; 254 return get_Method()->has_linenumber_table(); 255 } 256 257 258 // ------------------------------------------------------------------ 259 // ciMethod::compressed_linenumber_table 260 u_char* ciMethod::compressed_linenumber_table() const { 261 check_is_loaded(); 262 VM_ENTRY_MARK; 263 return get_Method()->compressed_linenumber_table(); 264 } 265 266 267 // ------------------------------------------------------------------ 268 // ciMethod::line_number_from_bci 269 int ciMethod::line_number_from_bci(int bci) const { 270 check_is_loaded(); 271 VM_ENTRY_MARK; 272 return get_Method()->line_number_from_bci(bci); 273 } 274 275 276 // ------------------------------------------------------------------ 277 // ciMethod::vtable_index 278 // 279 // Get the position of this method's entry in the vtable, if any. 280 int ciMethod::vtable_index() { 281 check_is_loaded(); 282 assert(holder()->is_linked(), "must be linked"); 283 VM_ENTRY_MARK; 284 return get_Method()->vtable_index(); 285 } 286 287 288 #ifdef SHARK 289 // ------------------------------------------------------------------ 290 // ciMethod::itable_index 291 // 292 // Get the position of this method's entry in the itable, if any. 293 int ciMethod::itable_index() { 294 check_is_loaded(); 295 assert(holder()->is_linked(), "must be linked"); 296 VM_ENTRY_MARK; 297 Method* m = get_Method(); 298 if (!m->has_itable_index()) 299 return Method::nonvirtual_vtable_index; 300 return m->itable_index(); 301 } 302 #endif // SHARK 303 304 305 // ------------------------------------------------------------------ 306 // ciMethod::native_entry 307 // 308 // Get the address of this method's native code, if any. 309 address ciMethod::native_entry() { 310 check_is_loaded(); 311 assert(flags().is_native(), "must be native method"); 312 VM_ENTRY_MARK; 313 Method* method = get_Method(); 314 address entry = method->native_function(); 315 assert(entry != NULL, "must be valid entry point"); 316 return entry; 317 } 318 319 320 // ------------------------------------------------------------------ 321 // ciMethod::interpreter_entry 322 // 323 // Get the entry point for running this method in the interpreter. 324 address ciMethod::interpreter_entry() { 325 check_is_loaded(); 326 VM_ENTRY_MARK; 327 methodHandle mh(THREAD, get_Method()); 328 return Interpreter::entry_for_method(mh); 329 } 330 331 332 // ------------------------------------------------------------------ 333 // ciMethod::uses_balanced_monitors 334 // 335 // Does this method use monitors in a strict stack-disciplined manner? 336 bool ciMethod::has_balanced_monitors() { 337 check_is_loaded(); 338 if (_balanced_monitors) return true; 339 340 // Analyze the method to see if monitors are used properly. 341 VM_ENTRY_MARK; 342 methodHandle method(THREAD, get_Method()); 343 assert(method->has_monitor_bytecodes(), "should have checked this"); 344 345 // Check to see if a previous compilation computed the 346 // monitor-matching analysis. 347 if (method->guaranteed_monitor_matching()) { 348 _balanced_monitors = true; 349 return true; 350 } 351 352 { 353 EXCEPTION_MARK; 354 ResourceMark rm(THREAD); 355 GeneratePairingInfo gpi(method); 356 gpi.compute_map(CATCH); 357 if (!gpi.monitor_safe()) { 358 return false; 359 } 360 method->set_guaranteed_monitor_matching(); 361 _balanced_monitors = true; 362 } 363 return true; 364 } 365 366 367 // ------------------------------------------------------------------ 368 // ciMethod::get_flow_analysis 369 ciTypeFlow* ciMethod::get_flow_analysis() { 370 #if defined(COMPILER2) || defined(SHARK) 371 if (_flow == NULL) { 372 ciEnv* env = CURRENT_ENV; 373 _flow = new (env->arena()) ciTypeFlow(env, this); 374 _flow->do_flow(); 375 } 376 return _flow; 377 #else // COMPILER2 || SHARK 378 ShouldNotReachHere(); 379 return NULL; 380 #endif // COMPILER2 || SHARK 381 } 382 383 384 // ------------------------------------------------------------------ 385 // ciMethod::get_osr_flow_analysis 386 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 387 #if defined(COMPILER2) || defined(SHARK) 388 // OSR entry points are always place after a call bytecode of some sort 389 assert(osr_bci >= 0, "must supply valid OSR entry point"); 390 ciEnv* env = CURRENT_ENV; 391 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 392 flow->do_flow(); 393 return flow; 394 #else // COMPILER2 || SHARK 395 ShouldNotReachHere(); 396 return NULL; 397 #endif // COMPILER2 || SHARK 398 } 399 400 // ------------------------------------------------------------------ 401 // ciMethod::raw_liveness_at_bci 402 // 403 // Which local variables are live at a specific bci? 404 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 405 check_is_loaded(); 406 if (_liveness == NULL) { 407 // Create the liveness analyzer. 408 Arena* arena = CURRENT_ENV->arena(); 409 _liveness = new (arena) MethodLiveness(arena, this); 410 _liveness->compute_liveness(); 411 } 412 return _liveness->get_liveness_at(bci); 413 } 414 415 // ------------------------------------------------------------------ 416 // ciMethod::liveness_at_bci 417 // 418 // Which local variables are live at a specific bci? When debugging 419 // will return true for all locals in some cases to improve debug 420 // information. 421 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 422 MethodLivenessResult result = raw_liveness_at_bci(bci); 423 if (CURRENT_ENV->should_retain_local_variables() || DeoptimizeALot || CompileTheWorld) { 424 // Keep all locals live for the user's edification and amusement. 425 result.at_put_range(0, result.size(), true); 426 } 427 return result; 428 } 429 430 // ciMethod::live_local_oops_at_bci 431 // 432 // find all the live oops in the locals array for a particular bci 433 // Compute what the interpreter believes by using the interpreter 434 // oopmap generator. This is used as a double check during osr to 435 // guard against conservative result from MethodLiveness making us 436 // think a dead oop is live. MethodLiveness is conservative in the 437 // sense that it may consider locals to be live which cannot be live, 438 // like in the case where a local could contain an oop or a primitive 439 // along different paths. In that case the local must be dead when 440 // those paths merge. Since the interpreter's viewpoint is used when 441 // gc'ing an interpreter frame we need to use its viewpoint during 442 // OSR when loading the locals. 443 444 BitMap ciMethod::live_local_oops_at_bci(int bci) { 445 VM_ENTRY_MARK; 446 InterpreterOopMap mask; 447 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 448 int mask_size = max_locals(); 449 BitMap result(mask_size); 450 result.clear(); 451 int i; 452 for (i = 0; i < mask_size ; i++ ) { 453 if (mask.is_oop(i)) result.set_bit(i); 454 } 455 return result; 456 } 457 458 459 #ifdef COMPILER1 460 // ------------------------------------------------------------------ 461 // ciMethod::bci_block_start 462 // 463 // Marks all bcis where a new basic block starts 464 const BitMap ciMethod::bci_block_start() { 465 check_is_loaded(); 466 if (_liveness == NULL) { 467 // Create the liveness analyzer. 468 Arena* arena = CURRENT_ENV->arena(); 469 _liveness = new (arena) MethodLiveness(arena, this); 470 _liveness->compute_liveness(); 471 } 472 473 return _liveness->get_bci_block_start(); 474 } 475 #endif // COMPILER1 476 477 478 // ------------------------------------------------------------------ 479 // ciMethod::call_profile_at_bci 480 // 481 // Get the ciCallProfile for the invocation of this method. 482 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 483 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 484 ResourceMark rm; 485 ciCallProfile result; 486 if (method_data() != NULL && method_data()->is_mature()) { 487 ciProfileData* data = method_data()->bci_to_data(bci); 488 if (data != NULL && data->is_CounterData()) { 489 // Every profiled call site has a counter. 490 int count = data->as_CounterData()->count(); 491 492 if (!data->is_ReceiverTypeData()) { 493 result._receiver_count[0] = 0; // that's a definite zero 494 } else { // ReceiverTypeData is a subclass of CounterData 495 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 496 // In addition, virtual call sites have receiver type information 497 int receivers_count_total = 0; 498 int morphism = 0; 499 // Precompute morphism for the possible fixup 500 for (uint i = 0; i < call->row_limit(); i++) { 501 ciKlass* receiver = call->receiver(i); 502 if (receiver == NULL) continue; 503 morphism++; 504 } 505 int epsilon = 0; 506 if (TieredCompilation && ProfileInterpreter) { 507 // Interpreter and C1 treat final and special invokes differently. 508 // C1 will record a type, whereas the interpreter will just 509 // increment the count. Detect this case. 510 if (morphism == 1 && count > 0) { 511 epsilon = count; 512 count = 0; 513 } 514 } 515 for (uint i = 0; i < call->row_limit(); i++) { 516 ciKlass* receiver = call->receiver(i); 517 if (receiver == NULL) continue; 518 int rcount = call->receiver_count(i) + epsilon; 519 if (rcount == 0) rcount = 1; // Should be valid value 520 receivers_count_total += rcount; 521 // Add the receiver to result data. 522 result.add_receiver(receiver, rcount); 523 // If we extend profiling to record methods, 524 // we will set result._method also. 525 } 526 // Determine call site's morphism. 527 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 528 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 529 // The call site count is > 0 in the case of a polymorphic virtual call. 530 if (morphism > 0 && morphism == result._limit) { 531 // The morphism <= MorphismLimit. 532 if ((morphism < ciCallProfile::MorphismLimit) || 533 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 534 #ifdef ASSERT 535 if (count > 0) { 536 this->print_short_name(tty); 537 tty->print_cr(" @ bci:%d", bci); 538 this->print_codes(); 539 assert(false, "this call site should not be polymorphic"); 540 } 541 #endif 542 result._morphism = morphism; 543 } 544 } 545 // Make the count consistent if this is a call profile. If count is 546 // zero or less, presume that this is a typecheck profile and 547 // do nothing. Otherwise, increase count to be the sum of all 548 // receiver's counts. 549 if (count >= 0) { 550 count += receivers_count_total; 551 } 552 } 553 result._count = count; 554 } 555 } 556 return result; 557 } 558 559 // ------------------------------------------------------------------ 560 // Add new receiver and sort data by receiver's profile count. 561 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 562 // Add new receiver and sort data by receiver's counts when we have space 563 // for it otherwise replace the less called receiver (less called receiver 564 // is placed to the last array element which is not used). 565 // First array's element contains most called receiver. 566 int i = _limit; 567 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 568 _receiver[i] = _receiver[i-1]; 569 _receiver_count[i] = _receiver_count[i-1]; 570 } 571 _receiver[i] = receiver; 572 _receiver_count[i] = receiver_count; 573 if (_limit < MorphismLimit) _limit++; 574 } 575 576 577 void ciMethod::assert_virtual_call_type_ok(int bci) { 578 assert(java_code_at_bci(bci) == Bytecodes::_invokevirtual || 579 java_code_at_bci(bci) == Bytecodes::_invokeinterface, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 580 } 581 582 void ciMethod::assert_call_type_ok(int bci) { 583 assert(java_code_at_bci(bci) == Bytecodes::_invokestatic || 584 java_code_at_bci(bci) == Bytecodes::_invokespecial || 585 java_code_at_bci(bci) == Bytecodes::_invokedynamic, "unexpected bytecode %s", Bytecodes::name(java_code_at_bci(bci))); 586 } 587 588 /** 589 * Check whether profiling provides a type for the argument i to the 590 * call at bci bci 591 * 592 * @param [in]bci bci of the call 593 * @param [in]i argument number 594 * @param [out]type profiled type of argument, NULL if none 595 * @param [out]maybe_null true if null was seen for argument 596 * @return true if profiling exists 597 * 598 */ 599 bool ciMethod::argument_profiled_type(int bci, int i, ciKlass*& type, bool& maybe_null) { 600 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 601 ciProfileData* data = method_data()->bci_to_data(bci); 602 if (data != NULL) { 603 if (data->is_VirtualCallTypeData()) { 604 assert_virtual_call_type_ok(bci); 605 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 606 if (i >= call->number_of_arguments()) { 607 return false; 608 } 609 type = call->valid_argument_type(i); 610 maybe_null = call->argument_maybe_null(i); 611 return true; 612 } else if (data->is_CallTypeData()) { 613 assert_call_type_ok(bci); 614 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 615 if (i >= call->number_of_arguments()) { 616 return false; 617 } 618 type = call->valid_argument_type(i); 619 maybe_null = call->argument_maybe_null(i); 620 return true; 621 } 622 } 623 } 624 return false; 625 } 626 627 /** 628 * Check whether profiling provides a type for the return value from 629 * the call at bci bci 630 * 631 * @param [in]bci bci of the call 632 * @param [out]type profiled type of argument, NULL if none 633 * @param [out]maybe_null true if null was seen for argument 634 * @return true if profiling exists 635 * 636 */ 637 bool ciMethod::return_profiled_type(int bci, ciKlass*& type, bool& maybe_null) { 638 if (MethodData::profile_return() && method_data() != NULL && method_data()->is_mature()) { 639 ciProfileData* data = method_data()->bci_to_data(bci); 640 if (data != NULL) { 641 if (data->is_VirtualCallTypeData()) { 642 assert_virtual_call_type_ok(bci); 643 ciVirtualCallTypeData* call = (ciVirtualCallTypeData*)data->as_VirtualCallTypeData(); 644 type = call->valid_return_type(); 645 maybe_null = call->return_maybe_null(); 646 return true; 647 } else if (data->is_CallTypeData()) { 648 assert_call_type_ok(bci); 649 ciCallTypeData* call = (ciCallTypeData*)data->as_CallTypeData(); 650 type = call->valid_return_type(); 651 maybe_null = call->return_maybe_null(); 652 return true; 653 } 654 } 655 } 656 return false; 657 } 658 659 /** 660 * Check whether profiling provides a type for the parameter i 661 * 662 * @param [in]i parameter number 663 * @param [out]type profiled type of parameter, NULL if none 664 * @param [out]maybe_null true if null was seen for parameter 665 * @return true if profiling exists 666 * 667 */ 668 bool ciMethod::parameter_profiled_type(int i, ciKlass*& type, bool& maybe_null) { 669 if (MethodData::profile_parameters() && method_data() != NULL && method_data()->is_mature()) { 670 ciParametersTypeData* parameters = method_data()->parameters_type_data(); 671 if (parameters != NULL && i < parameters->number_of_parameters()) { 672 type = parameters->valid_parameter_type(i); 673 maybe_null = parameters->parameter_maybe_null(i); 674 return true; 675 } 676 } 677 return false; 678 } 679 680 681 // ------------------------------------------------------------------ 682 // ciMethod::find_monomorphic_target 683 // 684 // Given a certain calling environment, find the monomorphic target 685 // for the call. Return NULL if the call is not monomorphic in 686 // its calling environment, or if there are only abstract methods. 687 // The returned method is never abstract. 688 // Note: If caller uses a non-null result, it must inform dependencies 689 // via assert_unique_concrete_method or assert_leaf_type. 690 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 691 ciInstanceKlass* callee_holder, 692 ciInstanceKlass* actual_recv, 693 bool check_access) { 694 check_is_loaded(); 695 696 if (actual_recv->is_interface()) { 697 // %%% We cannot trust interface types, yet. See bug 6312651. 698 return NULL; 699 } 700 701 ciMethod* root_m = resolve_invoke(caller, actual_recv, check_access); 702 if (root_m == NULL) { 703 // Something went wrong looking up the actual receiver method. 704 return NULL; 705 } 706 assert(!root_m->is_abstract(), "resolve_invoke promise"); 707 708 // Make certain quick checks even if UseCHA is false. 709 710 // Is it private or final? 711 if (root_m->can_be_statically_bound()) { 712 return root_m; 713 } 714 715 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 716 // Easy case. There is no other place to put a method, so don't bother 717 // to go through the VM_ENTRY_MARK and all the rest. 718 return root_m; 719 } 720 721 // Array methods (clone, hashCode, etc.) are always statically bound. 722 // If we were to see an array type here, we'd return root_m. 723 // However, this method processes only ciInstanceKlasses. (See 4962591.) 724 // The inline_native_clone intrinsic narrows Object to T[] properly, 725 // so there is no need to do the same job here. 726 727 if (!UseCHA) return NULL; 728 729 VM_ENTRY_MARK; 730 731 // Disable CHA for default methods for now 732 if (root_m->get_Method()->is_default_method()) { 733 return NULL; 734 } 735 736 methodHandle target; 737 { 738 MutexLocker locker(Compile_lock); 739 Klass* context = actual_recv->get_Klass(); 740 target = Dependencies::find_unique_concrete_method(context, 741 root_m->get_Method()); 742 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 743 } 744 745 #ifndef PRODUCT 746 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 747 tty->print("found a non-root unique target method"); 748 tty->print_cr(" context = %s", actual_recv->get_Klass()->external_name()); 749 tty->print(" method = "); 750 target->print_short_name(tty); 751 tty->cr(); 752 } 753 #endif //PRODUCT 754 755 if (target() == NULL) { 756 return NULL; 757 } 758 if (target() == root_m->get_Method()) { 759 return root_m; 760 } 761 if (!root_m->is_public() && 762 !root_m->is_protected()) { 763 // If we are going to reason about inheritance, it's easiest 764 // if the method in question is public, protected, or private. 765 // If the answer is not root_m, it is conservatively correct 766 // to return NULL, even if the CHA encountered irrelevant 767 // methods in other packages. 768 // %%% TO DO: Work out logic for package-private methods 769 // with the same name but different vtable indexes. 770 return NULL; 771 } 772 return CURRENT_THREAD_ENV->get_method(target()); 773 } 774 775 // ------------------------------------------------------------------ 776 // ciMethod::resolve_invoke 777 // 778 // Given a known receiver klass, find the target for the call. 779 // Return NULL if the call has no target or the target is abstract. 780 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver, bool check_access) { 781 check_is_loaded(); 782 VM_ENTRY_MARK; 783 784 KlassHandle caller_klass (THREAD, caller->get_Klass()); 785 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 786 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 787 Symbol* h_name = name()->get_symbol(); 788 Symbol* h_signature = signature()->get_symbol(); 789 790 LinkInfo link_info(h_resolved, h_name, h_signature, caller_klass, 791 check_access ? LinkInfo::needs_access_check : LinkInfo::skip_access_check); 792 methodHandle m; 793 // Only do exact lookup if receiver klass has been linked. Otherwise, 794 // the vtable has not been setup, and the LinkResolver will fail. 795 if (h_recv->is_array_klass() 796 || 797 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 798 if (holder()->is_interface()) { 799 m = LinkResolver::resolve_interface_call_or_null(h_recv, link_info); 800 } else { 801 m = LinkResolver::resolve_virtual_call_or_null(h_recv, link_info); 802 } 803 } 804 805 if (m.is_null()) { 806 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 807 return NULL; 808 } 809 810 ciMethod* result = this; 811 if (m() != get_Method()) { 812 result = CURRENT_THREAD_ENV->get_method(m()); 813 } 814 815 // Don't return abstract methods because they aren't 816 // optimizable or interesting. 817 if (result->is_abstract()) { 818 return NULL; 819 } else { 820 return result; 821 } 822 } 823 824 // ------------------------------------------------------------------ 825 // ciMethod::resolve_vtable_index 826 // 827 // Given a known receiver klass, find the vtable index for the call. 828 // Return Method::invalid_vtable_index if the vtable_index is unknown. 829 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 830 check_is_loaded(); 831 832 int vtable_index = Method::invalid_vtable_index; 833 // Only do lookup if receiver klass has been linked. Otherwise, 834 // the vtable has not been setup, and the LinkResolver will fail. 835 if (!receiver->is_interface() 836 && (!receiver->is_instance_klass() || 837 receiver->as_instance_klass()->is_linked())) { 838 VM_ENTRY_MARK; 839 840 KlassHandle caller_klass (THREAD, caller->get_Klass()); 841 KlassHandle h_recv (THREAD, receiver->get_Klass()); 842 Symbol* h_name = name()->get_symbol(); 843 Symbol* h_signature = signature()->get_symbol(); 844 845 LinkInfo link_info(h_recv, h_name, h_signature, caller_klass); 846 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, link_info); 847 if (vtable_index == Method::nonvirtual_vtable_index) { 848 // A statically bound method. Return "no such index". 849 vtable_index = Method::invalid_vtable_index; 850 } 851 } 852 853 return vtable_index; 854 } 855 856 // ------------------------------------------------------------------ 857 // ciMethod::interpreter_call_site_count 858 int ciMethod::interpreter_call_site_count(int bci) { 859 if (method_data() != NULL) { 860 ResourceMark rm; 861 ciProfileData* data = method_data()->bci_to_data(bci); 862 if (data != NULL && data->is_CounterData()) { 863 return scale_count(data->as_CounterData()->count()); 864 } 865 } 866 return -1; // unknown 867 } 868 869 // ------------------------------------------------------------------ 870 // ciMethod::get_field_at_bci 871 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 872 ciBytecodeStream iter(this); 873 iter.reset_to_bci(bci); 874 iter.next(); 875 return iter.get_field(will_link); 876 } 877 878 // ------------------------------------------------------------------ 879 // ciMethod::get_method_at_bci 880 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 881 ciBytecodeStream iter(this); 882 iter.reset_to_bci(bci); 883 iter.next(); 884 return iter.get_method(will_link, declared_signature); 885 } 886 887 // ------------------------------------------------------------------ 888 // Adjust a CounterData count to be commensurate with 889 // interpreter_invocation_count. If the MDO exists for 890 // only 25% of the time the method exists, then the 891 // counts in the MDO should be scaled by 4X, so that 892 // they can be usefully and stably compared against the 893 // invocation counts in methods. 894 int ciMethod::scale_count(int count, float prof_factor) { 895 if (count > 0 && method_data() != NULL) { 896 int counter_life; 897 int method_life = interpreter_invocation_count(); 898 if (TieredCompilation) { 899 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 900 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 901 } else { 902 int current_mileage = method_data()->current_mileage(); 903 int creation_mileage = method_data()->creation_mileage(); 904 counter_life = current_mileage - creation_mileage; 905 } 906 907 // counter_life due to backedge_counter could be > method_life 908 if (counter_life > method_life) 909 counter_life = method_life; 910 if (0 < counter_life && counter_life <= method_life) { 911 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 912 count = (count > 0) ? count : 1; 913 } 914 } 915 return count; 916 } 917 918 919 // ------------------------------------------------------------------ 920 // ciMethod::is_special_get_caller_class_method 921 // 922 bool ciMethod::is_ignored_by_security_stack_walk() const { 923 check_is_loaded(); 924 VM_ENTRY_MARK; 925 return get_Method()->is_ignored_by_security_stack_walk(); 926 } 927 928 929 // ------------------------------------------------------------------ 930 // invokedynamic support 931 932 // ------------------------------------------------------------------ 933 // ciMethod::is_method_handle_intrinsic 934 // 935 // Return true if the method is an instance of the JVM-generated 936 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 937 bool ciMethod::is_method_handle_intrinsic() const { 938 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 939 return (MethodHandles::is_signature_polymorphic(iid) && 940 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 941 } 942 943 // ------------------------------------------------------------------ 944 // ciMethod::is_compiled_lambda_form 945 // 946 // Return true if the method is a generated MethodHandle adapter. 947 // These are built by Java code. 948 bool ciMethod::is_compiled_lambda_form() const { 949 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 950 return iid == vmIntrinsics::_compiledLambdaForm; 951 } 952 953 // ------------------------------------------------------------------ 954 // ciMethod::has_member_arg 955 // 956 // Return true if the method is a linker intrinsic like _linkToVirtual. 957 // These are built by the JVM. 958 bool ciMethod::has_member_arg() const { 959 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 960 return (MethodHandles::is_signature_polymorphic(iid) && 961 MethodHandles::has_member_arg(iid)); 962 } 963 964 // ------------------------------------------------------------------ 965 // ciMethod::ensure_method_data 966 // 967 // Generate new MethodData* objects at compile time. 968 // Return true if allocation was successful or no MDO is required. 969 bool ciMethod::ensure_method_data(methodHandle h_m) { 970 EXCEPTION_CONTEXT; 971 if (is_native() || is_abstract() || h_m()->is_accessor()) { 972 return true; 973 } 974 if (h_m()->method_data() == NULL) { 975 Method::build_interpreter_method_data(h_m, THREAD); 976 if (HAS_PENDING_EXCEPTION) { 977 CLEAR_PENDING_EXCEPTION; 978 } 979 } 980 if (h_m()->method_data() != NULL) { 981 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 982 _method_data->load_data(); 983 return true; 984 } else { 985 _method_data = CURRENT_ENV->get_empty_methodData(); 986 return false; 987 } 988 } 989 990 // public, retroactive version 991 bool ciMethod::ensure_method_data() { 992 bool result = true; 993 if (_method_data == NULL || _method_data->is_empty()) { 994 GUARDED_VM_ENTRY({ 995 result = ensure_method_data(get_Method()); 996 }); 997 } 998 return result; 999 } 1000 1001 1002 // ------------------------------------------------------------------ 1003 // ciMethod::method_data 1004 // 1005 ciMethodData* ciMethod::method_data() { 1006 if (_method_data != NULL) { 1007 return _method_data; 1008 } 1009 VM_ENTRY_MARK; 1010 ciEnv* env = CURRENT_ENV; 1011 Thread* my_thread = JavaThread::current(); 1012 methodHandle h_m(my_thread, get_Method()); 1013 1014 if (h_m()->method_data() != NULL) { 1015 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 1016 _method_data->load_data(); 1017 } else { 1018 _method_data = CURRENT_ENV->get_empty_methodData(); 1019 } 1020 return _method_data; 1021 1022 } 1023 1024 // ------------------------------------------------------------------ 1025 // ciMethod::method_data_or_null 1026 // Returns a pointer to ciMethodData if MDO exists on the VM side, 1027 // NULL otherwise. 1028 ciMethodData* ciMethod::method_data_or_null() { 1029 ciMethodData *md = method_data(); 1030 if (md->is_empty()) { 1031 return NULL; 1032 } 1033 return md; 1034 } 1035 1036 // ------------------------------------------------------------------ 1037 // ciMethod::ensure_method_counters 1038 // 1039 MethodCounters* ciMethod::ensure_method_counters() { 1040 check_is_loaded(); 1041 VM_ENTRY_MARK; 1042 methodHandle mh(THREAD, get_Method()); 1043 MethodCounters* method_counters = mh->get_method_counters(CHECK_NULL); 1044 return method_counters; 1045 } 1046 1047 // ------------------------------------------------------------------ 1048 // ciMethod::should_inline 1049 // 1050 // Should this method be inlined during compilation? 1051 bool ciMethod::should_inline() { 1052 check_is_loaded(); 1053 VM_ENTRY_MARK; 1054 methodHandle mh(THREAD, get_Method()); 1055 return CompilerOracle::should_inline(mh); 1056 } 1057 1058 // ------------------------------------------------------------------ 1059 // ciMethod::should_not_inline 1060 // 1061 // Should this method be disallowed from inlining during compilation? 1062 bool ciMethod::should_not_inline() { 1063 check_is_loaded(); 1064 VM_ENTRY_MARK; 1065 methodHandle mh(THREAD, get_Method()); 1066 return CompilerOracle::should_not_inline(mh); 1067 } 1068 1069 // ------------------------------------------------------------------ 1070 // ciMethod::should_print_assembly 1071 // 1072 // Should the compiler print the generated code for this method? 1073 bool ciMethod::should_print_assembly() { 1074 check_is_loaded(); 1075 VM_ENTRY_MARK; 1076 methodHandle mh(THREAD, get_Method()); 1077 return CompilerOracle::should_print(mh); 1078 } 1079 1080 // ------------------------------------------------------------------ 1081 // ciMethod::break_at_execute 1082 // 1083 // Should the compiler insert a breakpoint into the generated code 1084 // method? 1085 bool ciMethod::break_at_execute() { 1086 check_is_loaded(); 1087 VM_ENTRY_MARK; 1088 methodHandle mh(THREAD, get_Method()); 1089 return CompilerOracle::should_break_at(mh); 1090 } 1091 1092 // ------------------------------------------------------------------ 1093 // ciMethod::has_option 1094 // 1095 bool ciMethod::has_option(const char* option) { 1096 check_is_loaded(); 1097 VM_ENTRY_MARK; 1098 methodHandle mh(THREAD, get_Method()); 1099 return CompilerOracle::has_option_string(mh, option); 1100 } 1101 1102 // ------------------------------------------------------------------ 1103 // ciMethod::has_option_value 1104 // 1105 template<typename T> 1106 bool ciMethod::has_option_value(const char* option, T& value) { 1107 check_is_loaded(); 1108 VM_ENTRY_MARK; 1109 methodHandle mh(THREAD, get_Method()); 1110 return CompilerOracle::has_option_value(mh, option, value); 1111 } 1112 // Explicit instantiation for all OptionTypes supported. 1113 template bool ciMethod::has_option_value<intx>(const char* option, intx& value); 1114 template bool ciMethod::has_option_value<uintx>(const char* option, uintx& value); 1115 template bool ciMethod::has_option_value<bool>(const char* option, bool& value); 1116 template bool ciMethod::has_option_value<ccstr>(const char* option, ccstr& value); 1117 template bool ciMethod::has_option_value<double>(const char* option, double& value); 1118 1119 // ------------------------------------------------------------------ 1120 // ciMethod::can_be_compiled 1121 // 1122 // Have previous compilations of this method succeeded? 1123 bool ciMethod::can_be_compiled() { 1124 check_is_loaded(); 1125 ciEnv* env = CURRENT_ENV; 1126 if (is_c1_compile(env->comp_level())) { 1127 return _is_c1_compilable; 1128 } 1129 return _is_c2_compilable; 1130 } 1131 1132 // ------------------------------------------------------------------ 1133 // ciMethod::set_not_compilable 1134 // 1135 // Tell the VM that this method cannot be compiled at all. 1136 void ciMethod::set_not_compilable(const char* reason) { 1137 check_is_loaded(); 1138 VM_ENTRY_MARK; 1139 ciEnv* env = CURRENT_ENV; 1140 if (is_c1_compile(env->comp_level())) { 1141 _is_c1_compilable = false; 1142 } else { 1143 _is_c2_compilable = false; 1144 } 1145 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1146 } 1147 1148 // ------------------------------------------------------------------ 1149 // ciMethod::can_be_osr_compiled 1150 // 1151 // Have previous compilations of this method succeeded? 1152 // 1153 // Implementation note: the VM does not currently keep track 1154 // of failed OSR compilations per bci. The entry_bci parameter 1155 // is currently unused. 1156 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1157 check_is_loaded(); 1158 VM_ENTRY_MARK; 1159 ciEnv* env = CURRENT_ENV; 1160 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1161 } 1162 1163 // ------------------------------------------------------------------ 1164 // ciMethod::has_compiled_code 1165 bool ciMethod::has_compiled_code() { 1166 return instructions_size() > 0; 1167 } 1168 1169 int ciMethod::comp_level() { 1170 check_is_loaded(); 1171 VM_ENTRY_MARK; 1172 nmethod* nm = get_Method()->code(); 1173 if (nm != NULL) return nm->comp_level(); 1174 return 0; 1175 } 1176 1177 int ciMethod::highest_osr_comp_level() { 1178 check_is_loaded(); 1179 VM_ENTRY_MARK; 1180 return get_Method()->highest_osr_comp_level(); 1181 } 1182 1183 // ------------------------------------------------------------------ 1184 // ciMethod::code_size_for_inlining 1185 // 1186 // Code size for inlining decisions. This method returns a code 1187 // size of 1 for methods which has the ForceInline annotation. 1188 int ciMethod::code_size_for_inlining() { 1189 check_is_loaded(); 1190 if (get_Method()->force_inline()) { 1191 return 1; 1192 } 1193 return code_size(); 1194 } 1195 1196 // ------------------------------------------------------------------ 1197 // ciMethod::instructions_size 1198 // 1199 // This is a rough metric for "fat" methods, compared before inlining 1200 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1201 // junk like exception handler, stubs, and constant table, which are 1202 // not highly relevant to an inlined method. So we use the more 1203 // specific accessor nmethod::insts_size. 1204 int ciMethod::instructions_size() { 1205 if (_instructions_size == -1) { 1206 GUARDED_VM_ENTRY( 1207 nmethod* code = get_Method()->code(); 1208 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1209 _instructions_size = code->insts_end() - code->verified_entry_point(); 1210 } else { 1211 _instructions_size = 0; 1212 } 1213 ); 1214 } 1215 return _instructions_size; 1216 } 1217 1218 // ------------------------------------------------------------------ 1219 // ciMethod::log_nmethod_identity 1220 void ciMethod::log_nmethod_identity(xmlStream* log) { 1221 GUARDED_VM_ENTRY( 1222 nmethod* code = get_Method()->code(); 1223 if (code != NULL) { 1224 code->log_identity(log); 1225 } 1226 ) 1227 } 1228 1229 // ------------------------------------------------------------------ 1230 // ciMethod::is_not_reached 1231 bool ciMethod::is_not_reached(int bci) { 1232 check_is_loaded(); 1233 VM_ENTRY_MARK; 1234 return Interpreter::is_not_reached( 1235 methodHandle(THREAD, get_Method()), bci); 1236 } 1237 1238 // ------------------------------------------------------------------ 1239 // ciMethod::was_never_executed 1240 bool ciMethod::was_executed_more_than(int times) { 1241 VM_ENTRY_MARK; 1242 return get_Method()->was_executed_more_than(times); 1243 } 1244 1245 // ------------------------------------------------------------------ 1246 // ciMethod::has_unloaded_classes_in_signature 1247 bool ciMethod::has_unloaded_classes_in_signature() { 1248 VM_ENTRY_MARK; 1249 { 1250 EXCEPTION_MARK; 1251 methodHandle m(THREAD, get_Method()); 1252 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1253 if( HAS_PENDING_EXCEPTION ) { 1254 CLEAR_PENDING_EXCEPTION; 1255 return true; // Declare that we may have unloaded classes 1256 } 1257 return has_unloaded; 1258 } 1259 } 1260 1261 // ------------------------------------------------------------------ 1262 // ciMethod::is_klass_loaded 1263 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1264 VM_ENTRY_MARK; 1265 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1266 } 1267 1268 // ------------------------------------------------------------------ 1269 // ciMethod::check_call 1270 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1271 // This method is used only in C2 from InlineTree::ok_to_inline, 1272 // and is only used under -Xcomp or -XX:CompileTheWorld. 1273 // It appears to fail when applied to an invokeinterface call site. 1274 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1275 VM_ENTRY_MARK; 1276 { 1277 EXCEPTION_MARK; 1278 HandleMark hm(THREAD); 1279 constantPoolHandle pool (THREAD, get_Method()->constants()); 1280 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1281 methodHandle spec_method = LinkResolver::resolve_method_statically(code, pool, refinfo_index, THREAD); 1282 if (HAS_PENDING_EXCEPTION) { 1283 CLEAR_PENDING_EXCEPTION; 1284 return false; 1285 } else { 1286 return (spec_method->is_static() == is_static); 1287 } 1288 } 1289 return false; 1290 } 1291 1292 // ------------------------------------------------------------------ 1293 // ciMethod::profile_aging 1294 // 1295 // Should the method be compiled with an age counter? 1296 bool ciMethod::profile_aging() const { 1297 return UseCodeAging && (!MethodCounters::is_nmethod_hot(nmethod_age()) && 1298 !MethodCounters::is_nmethod_age_unset(nmethod_age())); 1299 } 1300 // ------------------------------------------------------------------ 1301 // ciMethod::print_codes 1302 // 1303 // Print the bytecodes for this method. 1304 void ciMethod::print_codes_on(outputStream* st) { 1305 check_is_loaded(); 1306 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1307 } 1308 1309 1310 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1311 check_is_loaded(); \ 1312 VM_ENTRY_MARK; \ 1313 return get_Method()->flag_accessor(); \ 1314 } 1315 1316 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1317 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1318 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1319 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1320 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1321 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1322 1323 bool ciMethod::is_boxing_method() const { 1324 if (holder()->is_box_klass()) { 1325 switch (intrinsic_id()) { 1326 case vmIntrinsics::_Boolean_valueOf: 1327 case vmIntrinsics::_Byte_valueOf: 1328 case vmIntrinsics::_Character_valueOf: 1329 case vmIntrinsics::_Short_valueOf: 1330 case vmIntrinsics::_Integer_valueOf: 1331 case vmIntrinsics::_Long_valueOf: 1332 case vmIntrinsics::_Float_valueOf: 1333 case vmIntrinsics::_Double_valueOf: 1334 return true; 1335 default: 1336 return false; 1337 } 1338 } 1339 return false; 1340 } 1341 1342 bool ciMethod::is_unboxing_method() const { 1343 if (holder()->is_box_klass()) { 1344 switch (intrinsic_id()) { 1345 case vmIntrinsics::_booleanValue: 1346 case vmIntrinsics::_byteValue: 1347 case vmIntrinsics::_charValue: 1348 case vmIntrinsics::_shortValue: 1349 case vmIntrinsics::_intValue: 1350 case vmIntrinsics::_longValue: 1351 case vmIntrinsics::_floatValue: 1352 case vmIntrinsics::_doubleValue: 1353 return true; 1354 default: 1355 return false; 1356 } 1357 } 1358 return false; 1359 } 1360 1361 BCEscapeAnalyzer *ciMethod::get_bcea() { 1362 #ifdef COMPILER2 1363 if (_bcea == NULL) { 1364 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1365 } 1366 return _bcea; 1367 #else // COMPILER2 1368 ShouldNotReachHere(); 1369 return NULL; 1370 #endif // COMPILER2 1371 } 1372 1373 ciMethodBlocks *ciMethod::get_method_blocks() { 1374 Arena *arena = CURRENT_ENV->arena(); 1375 if (_method_blocks == NULL) { 1376 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1377 } 1378 return _method_blocks; 1379 } 1380 1381 #undef FETCH_FLAG_FROM_VM 1382 1383 void ciMethod::dump_name_as_ascii(outputStream* st) { 1384 Method* method = get_Method(); 1385 st->print("%s %s %s", 1386 method->klass_name()->as_quoted_ascii(), 1387 method->name()->as_quoted_ascii(), 1388 method->signature()->as_quoted_ascii()); 1389 } 1390 1391 void ciMethod::dump_replay_data(outputStream* st) { 1392 ResourceMark rm; 1393 Method* method = get_Method(); 1394 MethodCounters* mcs = method->method_counters(); 1395 st->print("ciMethod "); 1396 dump_name_as_ascii(st); 1397 st->print_cr(" %d %d %d %d %d", 1398 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1399 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1400 interpreter_invocation_count(), 1401 interpreter_throwout_count(), 1402 _instructions_size); 1403 } 1404 1405 // ------------------------------------------------------------------ 1406 // ciMethod::print_codes 1407 // 1408 // Print a range of the bytecodes for this method. 1409 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1410 check_is_loaded(); 1411 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1412 } 1413 1414 // ------------------------------------------------------------------ 1415 // ciMethod::print_name 1416 // 1417 // Print the name of this method, including signature and some flags. 1418 void ciMethod::print_name(outputStream* st) { 1419 check_is_loaded(); 1420 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1421 } 1422 1423 // ------------------------------------------------------------------ 1424 // ciMethod::print_short_name 1425 // 1426 // Print the name of this method, without signature. 1427 void ciMethod::print_short_name(outputStream* st) { 1428 if (is_loaded()) { 1429 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1430 } else { 1431 // Fall back if method is not loaded. 1432 holder()->print_name_on(st); 1433 st->print("::"); 1434 name()->print_symbol_on(st); 1435 if (WizardMode) 1436 signature()->as_symbol()->print_symbol_on(st); 1437 } 1438 } 1439 1440 // ------------------------------------------------------------------ 1441 // ciMethod::print_impl 1442 // 1443 // Implementation of the print method. 1444 void ciMethod::print_impl(outputStream* st) { 1445 ciMetadata::print_impl(st); 1446 st->print(" name="); 1447 name()->print_symbol_on(st); 1448 st->print(" holder="); 1449 holder()->print_name_on(st); 1450 st->print(" signature="); 1451 signature()->as_symbol()->print_symbol_on(st); 1452 if (is_loaded()) { 1453 st->print(" loaded=true"); 1454 st->print(" arg_size=%d", arg_size()); 1455 st->print(" flags="); 1456 flags().print_member_flags(st); 1457 } else { 1458 st->print(" loaded=false"); 1459 } 1460 } 1461 1462 #if INCLUDE_TRACE 1463 TraceStructCiMethod ciMethod::to_trace_struct() const { 1464 TraceStructCiMethod result; 1465 result.set_class(holder()->name()->as_utf8()); 1466 result.set_name(name()->as_utf8()); 1467 result.set_signature(signature()->as_symbol()->as_utf8()); 1468 return result; 1469 } 1470 #endif