1 /* 2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "ci/ciCallProfile.hpp" 27 #include "ci/ciExceptionHandler.hpp" 28 #include "ci/ciInstanceKlass.hpp" 29 #include "ci/ciMethod.hpp" 30 #include "ci/ciMethodBlocks.hpp" 31 #include "ci/ciMethodData.hpp" 32 #include "ci/ciStreams.hpp" 33 #include "ci/ciSymbol.hpp" 34 #include "ci/ciReplay.hpp" 35 #include "ci/ciUtilities.hpp" 36 #include "classfile/systemDictionary.hpp" 37 #include "compiler/abstractCompiler.hpp" 38 #include "compiler/compilerOracle.hpp" 39 #include "compiler/methodLiveness.hpp" 40 #include "interpreter/interpreter.hpp" 41 #include "interpreter/linkResolver.hpp" 42 #include "interpreter/oopMapCache.hpp" 43 #include "memory/allocation.inline.hpp" 44 #include "memory/resourceArea.hpp" 45 #include "oops/generateOopMap.hpp" 46 #include "oops/oop.inline.hpp" 47 #include "prims/nativeLookup.hpp" 48 #include "runtime/deoptimization.hpp" 49 #include "utilities/bitMap.inline.hpp" 50 #include "utilities/xmlstream.hpp" 51 #ifdef COMPILER2 52 #include "ci/bcEscapeAnalyzer.hpp" 53 #include "ci/ciTypeFlow.hpp" 54 #include "oops/method.hpp" 55 #endif 56 #ifdef SHARK 57 #include "ci/ciTypeFlow.hpp" 58 #include "oops/method.hpp" 59 #endif 60 61 // ciMethod 62 // 63 // This class represents a Method* in the HotSpot virtual 64 // machine. 65 66 67 // ------------------------------------------------------------------ 68 // ciMethod::ciMethod 69 // 70 // Loaded method. 71 ciMethod::ciMethod(methodHandle h_m) : ciMetadata(h_m()) { 72 assert(h_m() != NULL, "no null method"); 73 74 // These fields are always filled in in loaded methods. 75 _flags = ciFlags(h_m()->access_flags()); 76 77 // Easy to compute, so fill them in now. 78 _max_stack = h_m()->max_stack(); 79 _max_locals = h_m()->max_locals(); 80 _code_size = h_m()->code_size(); 81 _intrinsic_id = h_m()->intrinsic_id(); 82 _handler_count = h_m()->exception_table_length(); 83 _uses_monitors = h_m()->access_flags().has_monitor_bytecodes(); 84 _balanced_monitors = !_uses_monitors || h_m()->access_flags().is_monitor_matching(); 85 _is_c1_compilable = !h_m()->is_not_c1_compilable(); 86 _is_c2_compilable = !h_m()->is_not_c2_compilable(); 87 // Lazy fields, filled in on demand. Require allocation. 88 _code = NULL; 89 _exception_handlers = NULL; 90 _liveness = NULL; 91 _method_blocks = NULL; 92 #if defined(COMPILER2) || defined(SHARK) 93 _flow = NULL; 94 _bcea = NULL; 95 #endif // COMPILER2 || SHARK 96 97 ciEnv *env = CURRENT_ENV; 98 if (env->jvmti_can_hotswap_or_post_breakpoint() && can_be_compiled()) { 99 // 6328518 check hotswap conditions under the right lock. 100 MutexLocker locker(Compile_lock); 101 if (Dependencies::check_evol_method(h_m()) != NULL) { 102 _is_c1_compilable = false; 103 _is_c2_compilable = false; 104 } 105 } else { 106 CHECK_UNHANDLED_OOPS_ONLY(Thread::current()->clear_unhandled_oops()); 107 } 108 109 if (h_m()->method_holder()->is_linked()) { 110 _can_be_statically_bound = h_m()->can_be_statically_bound(); 111 } else { 112 // Have to use a conservative value in this case. 113 _can_be_statically_bound = false; 114 } 115 116 // Adjust the definition of this condition to be more useful: 117 // %%% take these conditions into account in vtable generation 118 if (!_can_be_statically_bound && h_m()->is_private()) 119 _can_be_statically_bound = true; 120 if (_can_be_statically_bound && h_m()->is_abstract()) 121 _can_be_statically_bound = false; 122 123 // generating _signature may allow GC and therefore move m. 124 // These fields are always filled in. 125 _name = env->get_symbol(h_m()->name()); 126 _holder = env->get_instance_klass(h_m()->method_holder()); 127 ciSymbol* sig_symbol = env->get_symbol(h_m()->signature()); 128 constantPoolHandle cpool = h_m()->constants(); 129 _signature = new (env->arena()) ciSignature(_holder, cpool, sig_symbol); 130 _method_data = NULL; 131 // Take a snapshot of these values, so they will be commensurate with the MDO. 132 if (ProfileInterpreter || TieredCompilation) { 133 int invcnt = h_m()->interpreter_invocation_count(); 134 // if the value overflowed report it as max int 135 _interpreter_invocation_count = invcnt < 0 ? max_jint : invcnt ; 136 _interpreter_throwout_count = h_m()->interpreter_throwout_count(); 137 } else { 138 _interpreter_invocation_count = 0; 139 _interpreter_throwout_count = 0; 140 } 141 if (_interpreter_invocation_count == 0) 142 _interpreter_invocation_count = 1; 143 _instructions_size = -1; 144 #ifdef ASSERT 145 if (ReplayCompiles) { 146 ciReplay::initialize(this); 147 } 148 #endif 149 } 150 151 152 // ------------------------------------------------------------------ 153 // ciMethod::ciMethod 154 // 155 // Unloaded method. 156 ciMethod::ciMethod(ciInstanceKlass* holder, 157 ciSymbol* name, 158 ciSymbol* signature, 159 ciInstanceKlass* accessor) : 160 ciMetadata((Metadata*)NULL), 161 _name( name), 162 _holder( holder), 163 _intrinsic_id( vmIntrinsics::_none), 164 _liveness( NULL), 165 _can_be_statically_bound(false), 166 _method_blocks( NULL), 167 _method_data( NULL) 168 #if defined(COMPILER2) || defined(SHARK) 169 , 170 _flow( NULL), 171 _bcea( NULL), 172 _instructions_size(-1) 173 #endif // COMPILER2 || SHARK 174 { 175 // Usually holder and accessor are the same type but in some cases 176 // the holder has the wrong class loader (e.g. invokedynamic call 177 // sites) so we pass the accessor. 178 _signature = new (CURRENT_ENV->arena()) ciSignature(accessor, constantPoolHandle(), signature); 179 } 180 181 182 // ------------------------------------------------------------------ 183 // ciMethod::load_code 184 // 185 // Load the bytecodes and exception handler table for this method. 186 void ciMethod::load_code() { 187 VM_ENTRY_MARK; 188 assert(is_loaded(), "only loaded methods have code"); 189 190 Method* me = get_Method(); 191 Arena* arena = CURRENT_THREAD_ENV->arena(); 192 193 // Load the bytecodes. 194 _code = (address)arena->Amalloc(code_size()); 195 memcpy(_code, me->code_base(), code_size()); 196 197 // Revert any breakpoint bytecodes in ci's copy 198 if (me->number_of_breakpoints() > 0) { 199 BreakpointInfo* bp = me->method_holder()->breakpoints(); 200 for (; bp != NULL; bp = bp->next()) { 201 if (bp->match(me)) { 202 code_at_put(bp->bci(), bp->orig_bytecode()); 203 } 204 } 205 } 206 207 // And load the exception table. 208 ExceptionTable exc_table(me); 209 210 // Allocate one extra spot in our list of exceptions. This 211 // last entry will be used to represent the possibility that 212 // an exception escapes the method. See ciExceptionHandlerStream 213 // for details. 214 _exception_handlers = 215 (ciExceptionHandler**)arena->Amalloc(sizeof(ciExceptionHandler*) 216 * (_handler_count + 1)); 217 if (_handler_count > 0) { 218 for (int i=0; i<_handler_count; i++) { 219 _exception_handlers[i] = new (arena) ciExceptionHandler( 220 holder(), 221 /* start */ exc_table.start_pc(i), 222 /* limit */ exc_table.end_pc(i), 223 /* goto pc */ exc_table.handler_pc(i), 224 /* cp index */ exc_table.catch_type_index(i)); 225 } 226 } 227 228 // Put an entry at the end of our list to represent the possibility 229 // of exceptional exit. 230 _exception_handlers[_handler_count] = 231 new (arena) ciExceptionHandler(holder(), 0, code_size(), -1, 0); 232 233 if (CIPrintMethodCodes) { 234 print_codes(); 235 } 236 } 237 238 239 // ------------------------------------------------------------------ 240 // ciMethod::has_linenumber_table 241 // 242 // length unknown until decompression 243 bool ciMethod::has_linenumber_table() const { 244 check_is_loaded(); 245 VM_ENTRY_MARK; 246 return get_Method()->has_linenumber_table(); 247 } 248 249 250 // ------------------------------------------------------------------ 251 // ciMethod::compressed_linenumber_table 252 u_char* ciMethod::compressed_linenumber_table() const { 253 check_is_loaded(); 254 VM_ENTRY_MARK; 255 return get_Method()->compressed_linenumber_table(); 256 } 257 258 259 // ------------------------------------------------------------------ 260 // ciMethod::line_number_from_bci 261 int ciMethod::line_number_from_bci(int bci) const { 262 check_is_loaded(); 263 VM_ENTRY_MARK; 264 return get_Method()->line_number_from_bci(bci); 265 } 266 267 268 // ------------------------------------------------------------------ 269 // ciMethod::vtable_index 270 // 271 // Get the position of this method's entry in the vtable, if any. 272 int ciMethod::vtable_index() { 273 check_is_loaded(); 274 assert(holder()->is_linked(), "must be linked"); 275 VM_ENTRY_MARK; 276 return get_Method()->vtable_index(); 277 } 278 279 280 #ifdef SHARK 281 // ------------------------------------------------------------------ 282 // ciMethod::itable_index 283 // 284 // Get the position of this method's entry in the itable, if any. 285 int ciMethod::itable_index() { 286 check_is_loaded(); 287 assert(holder()->is_linked(), "must be linked"); 288 VM_ENTRY_MARK; 289 Method* m = get_Method(); 290 if (!m->has_itable_index()) 291 return Method::nonvirtual_vtable_index; 292 return m->itable_index(); 293 } 294 #endif // SHARK 295 296 297 // ------------------------------------------------------------------ 298 // ciMethod::native_entry 299 // 300 // Get the address of this method's native code, if any. 301 address ciMethod::native_entry() { 302 check_is_loaded(); 303 assert(flags().is_native(), "must be native method"); 304 VM_ENTRY_MARK; 305 Method* method = get_Method(); 306 address entry = method->native_function(); 307 assert(entry != NULL, "must be valid entry point"); 308 return entry; 309 } 310 311 312 // ------------------------------------------------------------------ 313 // ciMethod::interpreter_entry 314 // 315 // Get the entry point for running this method in the interpreter. 316 address ciMethod::interpreter_entry() { 317 check_is_loaded(); 318 VM_ENTRY_MARK; 319 methodHandle mh(THREAD, get_Method()); 320 return Interpreter::entry_for_method(mh); 321 } 322 323 324 // ------------------------------------------------------------------ 325 // ciMethod::uses_balanced_monitors 326 // 327 // Does this method use monitors in a strict stack-disciplined manner? 328 bool ciMethod::has_balanced_monitors() { 329 check_is_loaded(); 330 if (_balanced_monitors) return true; 331 332 // Analyze the method to see if monitors are used properly. 333 VM_ENTRY_MARK; 334 methodHandle method(THREAD, get_Method()); 335 assert(method->has_monitor_bytecodes(), "should have checked this"); 336 337 // Check to see if a previous compilation computed the 338 // monitor-matching analysis. 339 if (method->guaranteed_monitor_matching()) { 340 _balanced_monitors = true; 341 return true; 342 } 343 344 { 345 EXCEPTION_MARK; 346 ResourceMark rm(THREAD); 347 GeneratePairingInfo gpi(method); 348 gpi.compute_map(CATCH); 349 if (!gpi.monitor_safe()) { 350 return false; 351 } 352 method->set_guaranteed_monitor_matching(); 353 _balanced_monitors = true; 354 } 355 return true; 356 } 357 358 359 // ------------------------------------------------------------------ 360 // ciMethod::get_flow_analysis 361 ciTypeFlow* ciMethod::get_flow_analysis() { 362 #if defined(COMPILER2) || defined(SHARK) 363 if (_flow == NULL) { 364 ciEnv* env = CURRENT_ENV; 365 _flow = new (env->arena()) ciTypeFlow(env, this); 366 _flow->do_flow(); 367 } 368 return _flow; 369 #else // COMPILER2 || SHARK 370 ShouldNotReachHere(); 371 return NULL; 372 #endif // COMPILER2 || SHARK 373 } 374 375 376 // ------------------------------------------------------------------ 377 // ciMethod::get_osr_flow_analysis 378 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 379 #if defined(COMPILER2) || defined(SHARK) 380 // OSR entry points are always place after a call bytecode of some sort 381 assert(osr_bci >= 0, "must supply valid OSR entry point"); 382 ciEnv* env = CURRENT_ENV; 383 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 384 flow->do_flow(); 385 return flow; 386 #else // COMPILER2 || SHARK 387 ShouldNotReachHere(); 388 return NULL; 389 #endif // COMPILER2 || SHARK 390 } 391 392 // ------------------------------------------------------------------ 393 // ciMethod::raw_liveness_at_bci 394 // 395 // Which local variables are live at a specific bci? 396 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 397 check_is_loaded(); 398 if (_liveness == NULL) { 399 // Create the liveness analyzer. 400 Arena* arena = CURRENT_ENV->arena(); 401 _liveness = new (arena) MethodLiveness(arena, this); 402 _liveness->compute_liveness(); 403 } 404 return _liveness->get_liveness_at(bci); 405 } 406 407 // ------------------------------------------------------------------ 408 // ciMethod::liveness_at_bci 409 // 410 // Which local variables are live at a specific bci? When debugging 411 // will return true for all locals in some cases to improve debug 412 // information. 413 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 414 MethodLivenessResult result = raw_liveness_at_bci(bci); 415 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { 416 // Keep all locals live for the user's edification and amusement. 417 result.at_put_range(0, result.size(), true); 418 } 419 return result; 420 } 421 422 // ciMethod::live_local_oops_at_bci 423 // 424 // find all the live oops in the locals array for a particular bci 425 // Compute what the interpreter believes by using the interpreter 426 // oopmap generator. This is used as a double check during osr to 427 // guard against conservative result from MethodLiveness making us 428 // think a dead oop is live. MethodLiveness is conservative in the 429 // sense that it may consider locals to be live which cannot be live, 430 // like in the case where a local could contain an oop or a primitive 431 // along different paths. In that case the local must be dead when 432 // those paths merge. Since the interpreter's viewpoint is used when 433 // gc'ing an interpreter frame we need to use its viewpoint during 434 // OSR when loading the locals. 435 436 BitMap ciMethod::live_local_oops_at_bci(int bci) { 437 VM_ENTRY_MARK; 438 InterpreterOopMap mask; 439 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 440 int mask_size = max_locals(); 441 BitMap result(mask_size); 442 result.clear(); 443 int i; 444 for (i = 0; i < mask_size ; i++ ) { 445 if (mask.is_oop(i)) result.set_bit(i); 446 } 447 return result; 448 } 449 450 451 #ifdef COMPILER1 452 // ------------------------------------------------------------------ 453 // ciMethod::bci_block_start 454 // 455 // Marks all bcis where a new basic block starts 456 const BitMap ciMethod::bci_block_start() { 457 check_is_loaded(); 458 if (_liveness == NULL) { 459 // Create the liveness analyzer. 460 Arena* arena = CURRENT_ENV->arena(); 461 _liveness = new (arena) MethodLiveness(arena, this); 462 _liveness->compute_liveness(); 463 } 464 465 return _liveness->get_bci_block_start(); 466 } 467 #endif // COMPILER1 468 469 470 // ------------------------------------------------------------------ 471 // ciMethod::call_profile_at_bci 472 // 473 // Get the ciCallProfile for the invocation of this method. 474 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 475 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 476 ResourceMark rm; 477 ciCallProfile result; 478 if (method_data() != NULL && method_data()->is_mature()) { 479 ciProfileData* data = method_data()->bci_to_data(bci); 480 if (data != NULL && data->is_CounterData()) { 481 // Every profiled call site has a counter. 482 int count = data->as_CounterData()->count(); 483 484 if (!data->is_ReceiverTypeData()) { 485 result._receiver_count[0] = 0; // that's a definite zero 486 } else { // ReceiverTypeData is a subclass of CounterData 487 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 488 // In addition, virtual call sites have receiver type information 489 int receivers_count_total = 0; 490 int morphism = 0; 491 // Precompute morphism for the possible fixup 492 for (uint i = 0; i < call->row_limit(); i++) { 493 ciKlass* receiver = call->receiver(i); 494 if (receiver == NULL) continue; 495 morphism++; 496 } 497 int epsilon = 0; 498 if (TieredCompilation && ProfileInterpreter) { 499 // Interpreter and C1 treat final and special invokes differently. 500 // C1 will record a type, whereas the interpreter will just 501 // increment the count. Detect this case. 502 if (morphism == 1 && count > 0) { 503 epsilon = count; 504 count = 0; 505 } 506 } 507 for (uint i = 0; i < call->row_limit(); i++) { 508 ciKlass* receiver = call->receiver(i); 509 if (receiver == NULL) continue; 510 int rcount = call->receiver_count(i) + epsilon; 511 if (rcount == 0) rcount = 1; // Should be valid value 512 receivers_count_total += rcount; 513 // Add the receiver to result data. 514 result.add_receiver(receiver, rcount); 515 // If we extend profiling to record methods, 516 // we will set result._method also. 517 } 518 // Determine call site's morphism. 519 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 520 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 521 // The call site count is > 0 in the case of a polymorphic virtual call. 522 if (morphism > 0 && morphism == result._limit) { 523 // The morphism <= MorphismLimit. 524 if ((morphism < ciCallProfile::MorphismLimit) || 525 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 526 #ifdef ASSERT 527 if (count > 0) { 528 this->print_short_name(tty); 529 tty->print_cr(" @ bci:%d", bci); 530 this->print_codes(); 531 assert(false, "this call site should not be polymorphic"); 532 } 533 #endif 534 result._morphism = morphism; 535 } 536 } 537 // Make the count consistent if this is a call profile. If count is 538 // zero or less, presume that this is a typecheck profile and 539 // do nothing. Otherwise, increase count to be the sum of all 540 // receiver's counts. 541 if (count >= 0) { 542 count += receivers_count_total; 543 } 544 } 545 result._count = count; 546 } 547 } 548 return result; 549 } 550 551 // ------------------------------------------------------------------ 552 // Add new receiver and sort data by receiver's profile count. 553 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 554 // Add new receiver and sort data by receiver's counts when we have space 555 // for it otherwise replace the less called receiver (less called receiver 556 // is placed to the last array element which is not used). 557 // First array's element contains most called receiver. 558 int i = _limit; 559 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 560 _receiver[i] = _receiver[i-1]; 561 _receiver_count[i] = _receiver_count[i-1]; 562 } 563 _receiver[i] = receiver; 564 _receiver_count[i] = receiver_count; 565 if (_limit < MorphismLimit) _limit++; 566 } 567 568 // ------------------------------------------------------------------ 569 // ciMethod::find_monomorphic_target 570 // 571 // Given a certain calling environment, find the monomorphic target 572 // for the call. Return NULL if the call is not monomorphic in 573 // its calling environment, or if there are only abstract methods. 574 // The returned method is never abstract. 575 // Note: If caller uses a non-null result, it must inform dependencies 576 // via assert_unique_concrete_method or assert_leaf_type. 577 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 578 ciInstanceKlass* callee_holder, 579 ciInstanceKlass* actual_recv) { 580 check_is_loaded(); 581 582 if (actual_recv->is_interface()) { 583 // %%% We cannot trust interface types, yet. See bug 6312651. 584 return NULL; 585 } 586 587 ciMethod* root_m = resolve_invoke(caller, actual_recv); 588 if (root_m == NULL) { 589 // Something went wrong looking up the actual receiver method. 590 return NULL; 591 } 592 assert(!root_m->is_abstract(), "resolve_invoke promise"); 593 594 // Make certain quick checks even if UseCHA is false. 595 596 // Is it private or final? 597 if (root_m->can_be_statically_bound()) { 598 return root_m; 599 } 600 601 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 602 // Easy case. There is no other place to put a method, so don't bother 603 // to go through the VM_ENTRY_MARK and all the rest. 604 return root_m; 605 } 606 607 // Array methods (clone, hashCode, etc.) are always statically bound. 608 // If we were to see an array type here, we'd return root_m. 609 // However, this method processes only ciInstanceKlasses. (See 4962591.) 610 // The inline_native_clone intrinsic narrows Object to T[] properly, 611 // so there is no need to do the same job here. 612 613 if (!UseCHA) return NULL; 614 615 VM_ENTRY_MARK; 616 617 methodHandle target; 618 { 619 MutexLocker locker(Compile_lock); 620 Klass* context = actual_recv->get_Klass(); 621 target = Dependencies::find_unique_concrete_method(context, 622 root_m->get_Method()); 623 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 624 } 625 626 #ifndef PRODUCT 627 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 628 tty->print("found a non-root unique target method"); 629 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); 630 tty->print(" method = "); 631 target->print_short_name(tty); 632 tty->cr(); 633 } 634 #endif //PRODUCT 635 636 if (target() == NULL) { 637 return NULL; 638 } 639 if (target() == root_m->get_Method()) { 640 return root_m; 641 } 642 if (!root_m->is_public() && 643 !root_m->is_protected()) { 644 // If we are going to reason about inheritance, it's easiest 645 // if the method in question is public, protected, or private. 646 // If the answer is not root_m, it is conservatively correct 647 // to return NULL, even if the CHA encountered irrelevant 648 // methods in other packages. 649 // %%% TO DO: Work out logic for package-private methods 650 // with the same name but different vtable indexes. 651 return NULL; 652 } 653 return CURRENT_THREAD_ENV->get_method(target()); 654 } 655 656 // ------------------------------------------------------------------ 657 // ciMethod::resolve_invoke 658 // 659 // Given a known receiver klass, find the target for the call. 660 // Return NULL if the call has no target or the target is abstract. 661 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { 662 check_is_loaded(); 663 VM_ENTRY_MARK; 664 665 KlassHandle caller_klass (THREAD, caller->get_Klass()); 666 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 667 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 668 Symbol* h_name = name()->get_symbol(); 669 Symbol* h_signature = signature()->get_symbol(); 670 671 methodHandle m; 672 // Only do exact lookup if receiver klass has been linked. Otherwise, 673 // the vtable has not been setup, and the LinkResolver will fail. 674 if (h_recv->oop_is_array() 675 || 676 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 677 if (holder()->is_interface()) { 678 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 679 } else { 680 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 681 } 682 } 683 684 if (m.is_null()) { 685 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 686 return NULL; 687 } 688 689 ciMethod* result = this; 690 if (m() != get_Method()) { 691 result = CURRENT_THREAD_ENV->get_method(m()); 692 } 693 694 // Don't return abstract methods because they aren't 695 // optimizable or interesting. 696 if (result->is_abstract()) { 697 return NULL; 698 } else { 699 return result; 700 } 701 } 702 703 // ------------------------------------------------------------------ 704 // ciMethod::resolve_vtable_index 705 // 706 // Given a known receiver klass, find the vtable index for the call. 707 // Return Method::invalid_vtable_index if the vtable_index is unknown. 708 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 709 check_is_loaded(); 710 711 int vtable_index = Method::invalid_vtable_index; 712 // Only do lookup if receiver klass has been linked. Otherwise, 713 // the vtable has not been setup, and the LinkResolver will fail. 714 if (!receiver->is_interface() 715 && (!receiver->is_instance_klass() || 716 receiver->as_instance_klass()->is_linked())) { 717 VM_ENTRY_MARK; 718 719 KlassHandle caller_klass (THREAD, caller->get_Klass()); 720 KlassHandle h_recv (THREAD, receiver->get_Klass()); 721 Symbol* h_name = name()->get_symbol(); 722 Symbol* h_signature = signature()->get_symbol(); 723 724 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); 725 if (vtable_index == Method::nonvirtual_vtable_index) { 726 // A statically bound method. Return "no such index". 727 vtable_index = Method::invalid_vtable_index; 728 } 729 } 730 731 return vtable_index; 732 } 733 734 // ------------------------------------------------------------------ 735 // ciMethod::interpreter_call_site_count 736 int ciMethod::interpreter_call_site_count(int bci) { 737 if (method_data() != NULL) { 738 ResourceMark rm; 739 ciProfileData* data = method_data()->bci_to_data(bci); 740 if (data != NULL && data->is_CounterData()) { 741 return scale_count(data->as_CounterData()->count()); 742 } 743 } 744 return -1; // unknown 745 } 746 747 // ------------------------------------------------------------------ 748 // ciMethod::get_field_at_bci 749 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 750 ciBytecodeStream iter(this); 751 iter.reset_to_bci(bci); 752 iter.next(); 753 return iter.get_field(will_link); 754 } 755 756 // ------------------------------------------------------------------ 757 // ciMethod::get_method_at_bci 758 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 759 ciBytecodeStream iter(this); 760 iter.reset_to_bci(bci); 761 iter.next(); 762 return iter.get_method(will_link, declared_signature); 763 } 764 765 // ------------------------------------------------------------------ 766 // Adjust a CounterData count to be commensurate with 767 // interpreter_invocation_count. If the MDO exists for 768 // only 25% of the time the method exists, then the 769 // counts in the MDO should be scaled by 4X, so that 770 // they can be usefully and stably compared against the 771 // invocation counts in methods. 772 int ciMethod::scale_count(int count, float prof_factor) { 773 if (count > 0 && method_data() != NULL) { 774 int counter_life; 775 int method_life = interpreter_invocation_count(); 776 if (TieredCompilation) { 777 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 778 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 779 } else { 780 int current_mileage = method_data()->current_mileage(); 781 int creation_mileage = method_data()->creation_mileage(); 782 counter_life = current_mileage - creation_mileage; 783 } 784 785 // counter_life due to backedge_counter could be > method_life 786 if (counter_life > method_life) 787 counter_life = method_life; 788 if (0 < counter_life && counter_life <= method_life) { 789 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 790 count = (count > 0) ? count : 1; 791 } 792 } 793 return count; 794 } 795 796 797 // ------------------------------------------------------------------ 798 // ciMethod::is_special_get_caller_class_method 799 // 800 bool ciMethod::is_ignored_by_security_stack_walk() const { 801 check_is_loaded(); 802 VM_ENTRY_MARK; 803 return get_Method()->is_ignored_by_security_stack_walk(); 804 } 805 806 807 // ------------------------------------------------------------------ 808 // invokedynamic support 809 810 // ------------------------------------------------------------------ 811 // ciMethod::is_method_handle_intrinsic 812 // 813 // Return true if the method is an instance of the JVM-generated 814 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 815 bool ciMethod::is_method_handle_intrinsic() const { 816 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 817 return (MethodHandles::is_signature_polymorphic(iid) && 818 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 819 } 820 821 // ------------------------------------------------------------------ 822 // ciMethod::is_compiled_lambda_form 823 // 824 // Return true if the method is a generated MethodHandle adapter. 825 // These are built by Java code. 826 bool ciMethod::is_compiled_lambda_form() const { 827 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 828 return iid == vmIntrinsics::_compiledLambdaForm; 829 } 830 831 // ------------------------------------------------------------------ 832 // ciMethod::has_member_arg 833 // 834 // Return true if the method is a linker intrinsic like _linkToVirtual. 835 // These are built by the JVM. 836 bool ciMethod::has_member_arg() const { 837 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 838 return (MethodHandles::is_signature_polymorphic(iid) && 839 MethodHandles::has_member_arg(iid)); 840 } 841 842 // ------------------------------------------------------------------ 843 // ciMethod::ensure_method_data 844 // 845 // Generate new MethodData* objects at compile time. 846 // Return true if allocation was successful or no MDO is required. 847 bool ciMethod::ensure_method_data(methodHandle h_m) { 848 EXCEPTION_CONTEXT; 849 if (is_native() || is_abstract() || h_m()->is_accessor()) return true; 850 if (h_m()->method_data() == NULL) { 851 Method::build_interpreter_method_data(h_m, THREAD); 852 if (HAS_PENDING_EXCEPTION) { 853 CLEAR_PENDING_EXCEPTION; 854 } 855 } 856 if (h_m()->method_data() != NULL) { 857 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 858 _method_data->load_data(); 859 return true; 860 } else { 861 _method_data = CURRENT_ENV->get_empty_methodData(); 862 return false; 863 } 864 } 865 866 // public, retroactive version 867 bool ciMethod::ensure_method_data() { 868 bool result = true; 869 if (_method_data == NULL || _method_data->is_empty()) { 870 GUARDED_VM_ENTRY({ 871 result = ensure_method_data(get_Method()); 872 }); 873 } 874 return result; 875 } 876 877 878 // ------------------------------------------------------------------ 879 // ciMethod::method_data 880 // 881 ciMethodData* ciMethod::method_data() { 882 if (_method_data != NULL) { 883 return _method_data; 884 } 885 VM_ENTRY_MARK; 886 ciEnv* env = CURRENT_ENV; 887 Thread* my_thread = JavaThread::current(); 888 methodHandle h_m(my_thread, get_Method()); 889 890 if (h_m()->method_data() != NULL) { 891 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 892 _method_data->load_data(); 893 } else { 894 _method_data = CURRENT_ENV->get_empty_methodData(); 895 } 896 return _method_data; 897 898 } 899 900 // ------------------------------------------------------------------ 901 // ciMethod::method_data_or_null 902 // Returns a pointer to ciMethodData if MDO exists on the VM side, 903 // NULL otherwise. 904 ciMethodData* ciMethod::method_data_or_null() { 905 ciMethodData *md = method_data(); 906 if (md->is_empty()) return NULL; 907 return md; 908 } 909 910 // ------------------------------------------------------------------ 911 // ciMethod::ensure_method_counters 912 // 913 address ciMethod::ensure_method_counters() { 914 check_is_loaded(); 915 VM_ENTRY_MARK; 916 methodHandle mh(THREAD, get_Method()); 917 MethodCounters *counter = mh->method_counters(); 918 if (counter == NULL) { 919 counter = Method::build_method_counters(mh(), CHECK_AND_CLEAR_NULL); 920 } 921 return (address)counter; 922 } 923 924 // ------------------------------------------------------------------ 925 // ciMethod::should_exclude 926 // 927 // Should this method be excluded from compilation? 928 bool ciMethod::should_exclude() { 929 check_is_loaded(); 930 VM_ENTRY_MARK; 931 methodHandle mh(THREAD, get_Method()); 932 bool ignore; 933 return CompilerOracle::should_exclude(mh, ignore); 934 } 935 936 // ------------------------------------------------------------------ 937 // ciMethod::should_inline 938 // 939 // Should this method be inlined during compilation? 940 bool ciMethod::should_inline() { 941 check_is_loaded(); 942 VM_ENTRY_MARK; 943 methodHandle mh(THREAD, get_Method()); 944 return CompilerOracle::should_inline(mh); 945 } 946 947 // ------------------------------------------------------------------ 948 // ciMethod::should_not_inline 949 // 950 // Should this method be disallowed from inlining during compilation? 951 bool ciMethod::should_not_inline() { 952 check_is_loaded(); 953 VM_ENTRY_MARK; 954 methodHandle mh(THREAD, get_Method()); 955 return CompilerOracle::should_not_inline(mh); 956 } 957 958 // ------------------------------------------------------------------ 959 // ciMethod::should_print_assembly 960 // 961 // Should the compiler print the generated code for this method? 962 bool ciMethod::should_print_assembly() { 963 check_is_loaded(); 964 VM_ENTRY_MARK; 965 methodHandle mh(THREAD, get_Method()); 966 return CompilerOracle::should_print(mh); 967 } 968 969 // ------------------------------------------------------------------ 970 // ciMethod::break_at_execute 971 // 972 // Should the compiler insert a breakpoint into the generated code 973 // method? 974 bool ciMethod::break_at_execute() { 975 check_is_loaded(); 976 VM_ENTRY_MARK; 977 methodHandle mh(THREAD, get_Method()); 978 return CompilerOracle::should_break_at(mh); 979 } 980 981 // ------------------------------------------------------------------ 982 // ciMethod::has_option 983 // 984 bool ciMethod::has_option(const char* option) { 985 check_is_loaded(); 986 VM_ENTRY_MARK; 987 methodHandle mh(THREAD, get_Method()); 988 return CompilerOracle::has_option_string(mh, option); 989 } 990 991 // ------------------------------------------------------------------ 992 // ciMethod::can_be_compiled 993 // 994 // Have previous compilations of this method succeeded? 995 bool ciMethod::can_be_compiled() { 996 check_is_loaded(); 997 ciEnv* env = CURRENT_ENV; 998 if (is_c1_compile(env->comp_level())) { 999 return _is_c1_compilable; 1000 } 1001 return _is_c2_compilable; 1002 } 1003 1004 // ------------------------------------------------------------------ 1005 // ciMethod::set_not_compilable 1006 // 1007 // Tell the VM that this method cannot be compiled at all. 1008 void ciMethod::set_not_compilable(const char* reason) { 1009 check_is_loaded(); 1010 VM_ENTRY_MARK; 1011 ciEnv* env = CURRENT_ENV; 1012 if (is_c1_compile(env->comp_level())) { 1013 _is_c1_compilable = false; 1014 } else { 1015 _is_c2_compilable = false; 1016 } 1017 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1018 } 1019 1020 // ------------------------------------------------------------------ 1021 // ciMethod::can_be_osr_compiled 1022 // 1023 // Have previous compilations of this method succeeded? 1024 // 1025 // Implementation note: the VM does not currently keep track 1026 // of failed OSR compilations per bci. The entry_bci parameter 1027 // is currently unused. 1028 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1029 check_is_loaded(); 1030 VM_ENTRY_MARK; 1031 ciEnv* env = CURRENT_ENV; 1032 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1033 } 1034 1035 // ------------------------------------------------------------------ 1036 // ciMethod::has_compiled_code 1037 bool ciMethod::has_compiled_code() { 1038 return instructions_size() > 0; 1039 } 1040 1041 int ciMethod::comp_level() { 1042 check_is_loaded(); 1043 VM_ENTRY_MARK; 1044 nmethod* nm = get_Method()->code(); 1045 if (nm != NULL) return nm->comp_level(); 1046 return 0; 1047 } 1048 1049 int ciMethod::highest_osr_comp_level() { 1050 check_is_loaded(); 1051 VM_ENTRY_MARK; 1052 return get_Method()->highest_osr_comp_level(); 1053 } 1054 1055 // ------------------------------------------------------------------ 1056 // ciMethod::code_size_for_inlining 1057 // 1058 // Code size for inlining decisions. This method returns a code 1059 // size of 1 for methods which has the ForceInline annotation. 1060 int ciMethod::code_size_for_inlining() { 1061 check_is_loaded(); 1062 if (get_Method()->force_inline()) { 1063 return 1; 1064 } 1065 return code_size(); 1066 } 1067 1068 // ------------------------------------------------------------------ 1069 // ciMethod::instructions_size 1070 // 1071 // This is a rough metric for "fat" methods, compared before inlining 1072 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1073 // junk like exception handler, stubs, and constant table, which are 1074 // not highly relevant to an inlined method. So we use the more 1075 // specific accessor nmethod::insts_size. 1076 int ciMethod::instructions_size() { 1077 if (_instructions_size == -1) { 1078 GUARDED_VM_ENTRY( 1079 nmethod* code = get_Method()->code(); 1080 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1081 _instructions_size = code->insts_end() - code->verified_entry_point(); 1082 } else { 1083 _instructions_size = 0; 1084 } 1085 ); 1086 } 1087 return _instructions_size; 1088 } 1089 1090 // ------------------------------------------------------------------ 1091 // ciMethod::log_nmethod_identity 1092 void ciMethod::log_nmethod_identity(xmlStream* log) { 1093 GUARDED_VM_ENTRY( 1094 nmethod* code = get_Method()->code(); 1095 if (code != NULL) { 1096 code->log_identity(log); 1097 } 1098 ) 1099 } 1100 1101 // ------------------------------------------------------------------ 1102 // ciMethod::is_not_reached 1103 bool ciMethod::is_not_reached(int bci) { 1104 check_is_loaded(); 1105 VM_ENTRY_MARK; 1106 return Interpreter::is_not_reached( 1107 methodHandle(THREAD, get_Method()), bci); 1108 } 1109 1110 // ------------------------------------------------------------------ 1111 // ciMethod::was_never_executed 1112 bool ciMethod::was_executed_more_than(int times) { 1113 VM_ENTRY_MARK; 1114 return get_Method()->was_executed_more_than(times); 1115 } 1116 1117 // ------------------------------------------------------------------ 1118 // ciMethod::has_unloaded_classes_in_signature 1119 bool ciMethod::has_unloaded_classes_in_signature() { 1120 VM_ENTRY_MARK; 1121 { 1122 EXCEPTION_MARK; 1123 methodHandle m(THREAD, get_Method()); 1124 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1125 if( HAS_PENDING_EXCEPTION ) { 1126 CLEAR_PENDING_EXCEPTION; 1127 return true; // Declare that we may have unloaded classes 1128 } 1129 return has_unloaded; 1130 } 1131 } 1132 1133 // ------------------------------------------------------------------ 1134 // ciMethod::is_klass_loaded 1135 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1136 VM_ENTRY_MARK; 1137 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1138 } 1139 1140 // ------------------------------------------------------------------ 1141 // ciMethod::check_call 1142 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1143 // This method is used only in C2 from InlineTree::ok_to_inline, 1144 // and is only used under -Xcomp or -XX:CompileTheWorld. 1145 // It appears to fail when applied to an invokeinterface call site. 1146 // FIXME: Remove this method and resolve_method_statically; refactor to use the other LinkResolver entry points. 1147 VM_ENTRY_MARK; 1148 { 1149 EXCEPTION_MARK; 1150 HandleMark hm(THREAD); 1151 constantPoolHandle pool (THREAD, get_Method()->constants()); 1152 methodHandle spec_method; 1153 KlassHandle spec_klass; 1154 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1155 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); 1156 if (HAS_PENDING_EXCEPTION) { 1157 CLEAR_PENDING_EXCEPTION; 1158 return false; 1159 } else { 1160 return (spec_method->is_static() == is_static); 1161 } 1162 } 1163 return false; 1164 } 1165 1166 // ------------------------------------------------------------------ 1167 // ciMethod::print_codes 1168 // 1169 // Print the bytecodes for this method. 1170 void ciMethod::print_codes_on(outputStream* st) { 1171 check_is_loaded(); 1172 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1173 } 1174 1175 1176 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1177 check_is_loaded(); \ 1178 VM_ENTRY_MARK; \ 1179 return get_Method()->flag_accessor(); \ 1180 } 1181 1182 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1183 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1184 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1185 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1186 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1187 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1188 1189 bool ciMethod::is_boxing_method() const { 1190 if (holder()->is_box_klass()) { 1191 switch (intrinsic_id()) { 1192 case vmIntrinsics::_Boolean_valueOf: 1193 case vmIntrinsics::_Byte_valueOf: 1194 case vmIntrinsics::_Character_valueOf: 1195 case vmIntrinsics::_Short_valueOf: 1196 case vmIntrinsics::_Integer_valueOf: 1197 case vmIntrinsics::_Long_valueOf: 1198 case vmIntrinsics::_Float_valueOf: 1199 case vmIntrinsics::_Double_valueOf: 1200 return true; 1201 default: 1202 return false; 1203 } 1204 } 1205 return false; 1206 } 1207 1208 bool ciMethod::is_unboxing_method() const { 1209 if (holder()->is_box_klass()) { 1210 switch (intrinsic_id()) { 1211 case vmIntrinsics::_booleanValue: 1212 case vmIntrinsics::_byteValue: 1213 case vmIntrinsics::_charValue: 1214 case vmIntrinsics::_shortValue: 1215 case vmIntrinsics::_intValue: 1216 case vmIntrinsics::_longValue: 1217 case vmIntrinsics::_floatValue: 1218 case vmIntrinsics::_doubleValue: 1219 return true; 1220 default: 1221 return false; 1222 } 1223 } 1224 return false; 1225 } 1226 1227 BCEscapeAnalyzer *ciMethod::get_bcea() { 1228 #ifdef COMPILER2 1229 if (_bcea == NULL) { 1230 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1231 } 1232 return _bcea; 1233 #else // COMPILER2 1234 ShouldNotReachHere(); 1235 return NULL; 1236 #endif // COMPILER2 1237 } 1238 1239 ciMethodBlocks *ciMethod::get_method_blocks() { 1240 Arena *arena = CURRENT_ENV->arena(); 1241 if (_method_blocks == NULL) { 1242 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1243 } 1244 return _method_blocks; 1245 } 1246 1247 #undef FETCH_FLAG_FROM_VM 1248 1249 void ciMethod::dump_replay_data(outputStream* st) { 1250 ASSERT_IN_VM; 1251 ResourceMark rm; 1252 Method* method = get_Method(); 1253 MethodCounters* mcs = method->method_counters(); 1254 Klass* holder = method->method_holder(); 1255 st->print_cr("ciMethod %s %s %s %d %d %d %d %d", 1256 holder->name()->as_quoted_ascii(), 1257 method->name()->as_quoted_ascii(), 1258 method->signature()->as_quoted_ascii(), 1259 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1260 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1261 interpreter_invocation_count(), 1262 interpreter_throwout_count(), 1263 _instructions_size); 1264 } 1265 1266 // ------------------------------------------------------------------ 1267 // ciMethod::print_codes 1268 // 1269 // Print a range of the bytecodes for this method. 1270 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1271 check_is_loaded(); 1272 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1273 } 1274 1275 // ------------------------------------------------------------------ 1276 // ciMethod::print_name 1277 // 1278 // Print the name of this method, including signature and some flags. 1279 void ciMethod::print_name(outputStream* st) { 1280 check_is_loaded(); 1281 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1282 } 1283 1284 // ------------------------------------------------------------------ 1285 // ciMethod::print_short_name 1286 // 1287 // Print the name of this method, without signature. 1288 void ciMethod::print_short_name(outputStream* st) { 1289 if (is_loaded()) { 1290 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1291 } else { 1292 // Fall back if method is not loaded. 1293 holder()->print_name_on(st); 1294 st->print("::"); 1295 name()->print_symbol_on(st); 1296 if (WizardMode) 1297 signature()->as_symbol()->print_symbol_on(st); 1298 } 1299 } 1300 1301 // ------------------------------------------------------------------ 1302 // ciMethod::print_impl 1303 // 1304 // Implementation of the print method. 1305 void ciMethod::print_impl(outputStream* st) { 1306 ciMetadata::print_impl(st); 1307 st->print(" name="); 1308 name()->print_symbol_on(st); 1309 st->print(" holder="); 1310 holder()->print_name_on(st); 1311 st->print(" signature="); 1312 signature()->as_symbol()->print_symbol_on(st); 1313 if (is_loaded()) { 1314 st->print(" loaded=true"); 1315 st->print(" arg_size=%d", arg_size()); 1316 st->print(" flags="); 1317 flags().print_member_flags(st); 1318 } else { 1319 st->print(" loaded=false"); 1320 } 1321 }