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 return klassItable::compute_itable_index(get_Method()); 290 } 291 #endif // SHARK 292 293 294 // ------------------------------------------------------------------ 295 // ciMethod::native_entry 296 // 297 // Get the address of this method's native code, if any. 298 address ciMethod::native_entry() { 299 check_is_loaded(); 300 assert(flags().is_native(), "must be native method"); 301 VM_ENTRY_MARK; 302 Method* method = get_Method(); 303 address entry = method->native_function(); 304 assert(entry != NULL, "must be valid entry point"); 305 return entry; 306 } 307 308 309 // ------------------------------------------------------------------ 310 // ciMethod::interpreter_entry 311 // 312 // Get the entry point for running this method in the interpreter. 313 address ciMethod::interpreter_entry() { 314 check_is_loaded(); 315 VM_ENTRY_MARK; 316 methodHandle mh(THREAD, get_Method()); 317 return Interpreter::entry_for_method(mh); 318 } 319 320 321 // ------------------------------------------------------------------ 322 // ciMethod::uses_balanced_monitors 323 // 324 // Does this method use monitors in a strict stack-disciplined manner? 325 bool ciMethod::has_balanced_monitors() { 326 check_is_loaded(); 327 if (_balanced_monitors) return true; 328 329 // Analyze the method to see if monitors are used properly. 330 VM_ENTRY_MARK; 331 methodHandle method(THREAD, get_Method()); 332 assert(method->has_monitor_bytecodes(), "should have checked this"); 333 334 // Check to see if a previous compilation computed the 335 // monitor-matching analysis. 336 if (method->guaranteed_monitor_matching()) { 337 _balanced_monitors = true; 338 return true; 339 } 340 341 { 342 EXCEPTION_MARK; 343 ResourceMark rm(THREAD); 344 GeneratePairingInfo gpi(method); 345 gpi.compute_map(CATCH); 346 if (!gpi.monitor_safe()) { 347 return false; 348 } 349 method->set_guaranteed_monitor_matching(); 350 _balanced_monitors = true; 351 } 352 return true; 353 } 354 355 356 // ------------------------------------------------------------------ 357 // ciMethod::get_flow_analysis 358 ciTypeFlow* ciMethod::get_flow_analysis() { 359 #if defined(COMPILER2) || defined(SHARK) 360 if (_flow == NULL) { 361 ciEnv* env = CURRENT_ENV; 362 _flow = new (env->arena()) ciTypeFlow(env, this); 363 _flow->do_flow(); 364 } 365 return _flow; 366 #else // COMPILER2 || SHARK 367 ShouldNotReachHere(); 368 return NULL; 369 #endif // COMPILER2 || SHARK 370 } 371 372 373 // ------------------------------------------------------------------ 374 // ciMethod::get_osr_flow_analysis 375 ciTypeFlow* ciMethod::get_osr_flow_analysis(int osr_bci) { 376 #if defined(COMPILER2) || defined(SHARK) 377 // OSR entry points are always place after a call bytecode of some sort 378 assert(osr_bci >= 0, "must supply valid OSR entry point"); 379 ciEnv* env = CURRENT_ENV; 380 ciTypeFlow* flow = new (env->arena()) ciTypeFlow(env, this, osr_bci); 381 flow->do_flow(); 382 return flow; 383 #else // COMPILER2 || SHARK 384 ShouldNotReachHere(); 385 return NULL; 386 #endif // COMPILER2 || SHARK 387 } 388 389 // ------------------------------------------------------------------ 390 // ciMethod::raw_liveness_at_bci 391 // 392 // Which local variables are live at a specific bci? 393 MethodLivenessResult ciMethod::raw_liveness_at_bci(int bci) { 394 check_is_loaded(); 395 if (_liveness == NULL) { 396 // Create the liveness analyzer. 397 Arena* arena = CURRENT_ENV->arena(); 398 _liveness = new (arena) MethodLiveness(arena, this); 399 _liveness->compute_liveness(); 400 } 401 return _liveness->get_liveness_at(bci); 402 } 403 404 // ------------------------------------------------------------------ 405 // ciMethod::liveness_at_bci 406 // 407 // Which local variables are live at a specific bci? When debugging 408 // will return true for all locals in some cases to improve debug 409 // information. 410 MethodLivenessResult ciMethod::liveness_at_bci(int bci) { 411 MethodLivenessResult result = raw_liveness_at_bci(bci); 412 if (CURRENT_ENV->jvmti_can_access_local_variables() || DeoptimizeALot || CompileTheWorld) { 413 // Keep all locals live for the user's edification and amusement. 414 result.at_put_range(0, result.size(), true); 415 } 416 return result; 417 } 418 419 // ciMethod::live_local_oops_at_bci 420 // 421 // find all the live oops in the locals array for a particular bci 422 // Compute what the interpreter believes by using the interpreter 423 // oopmap generator. This is used as a double check during osr to 424 // guard against conservative result from MethodLiveness making us 425 // think a dead oop is live. MethodLiveness is conservative in the 426 // sense that it may consider locals to be live which cannot be live, 427 // like in the case where a local could contain an oop or a primitive 428 // along different paths. In that case the local must be dead when 429 // those paths merge. Since the interpreter's viewpoint is used when 430 // gc'ing an interpreter frame we need to use its viewpoint during 431 // OSR when loading the locals. 432 433 BitMap ciMethod::live_local_oops_at_bci(int bci) { 434 VM_ENTRY_MARK; 435 InterpreterOopMap mask; 436 OopMapCache::compute_one_oop_map(get_Method(), bci, &mask); 437 int mask_size = max_locals(); 438 BitMap result(mask_size); 439 result.clear(); 440 int i; 441 for (i = 0; i < mask_size ; i++ ) { 442 if (mask.is_oop(i)) result.set_bit(i); 443 } 444 return result; 445 } 446 447 448 #ifdef COMPILER1 449 // ------------------------------------------------------------------ 450 // ciMethod::bci_block_start 451 // 452 // Marks all bcis where a new basic block starts 453 const BitMap ciMethod::bci_block_start() { 454 check_is_loaded(); 455 if (_liveness == NULL) { 456 // Create the liveness analyzer. 457 Arena* arena = CURRENT_ENV->arena(); 458 _liveness = new (arena) MethodLiveness(arena, this); 459 _liveness->compute_liveness(); 460 } 461 462 return _liveness->get_bci_block_start(); 463 } 464 #endif // COMPILER1 465 466 467 // ------------------------------------------------------------------ 468 // ciMethod::call_profile_at_bci 469 // 470 // Get the ciCallProfile for the invocation of this method. 471 // Also reports receiver types for non-call type checks (if TypeProfileCasts). 472 ciCallProfile ciMethod::call_profile_at_bci(int bci) { 473 ResourceMark rm; 474 ciCallProfile result; 475 if (method_data() != NULL && method_data()->is_mature()) { 476 ciProfileData* data = method_data()->bci_to_data(bci); 477 if (data != NULL && data->is_CounterData()) { 478 // Every profiled call site has a counter. 479 int count = data->as_CounterData()->count(); 480 481 if (!data->is_ReceiverTypeData()) { 482 result._receiver_count[0] = 0; // that's a definite zero 483 } else { // ReceiverTypeData is a subclass of CounterData 484 ciReceiverTypeData* call = (ciReceiverTypeData*)data->as_ReceiverTypeData(); 485 // In addition, virtual call sites have receiver type information 486 int receivers_count_total = 0; 487 int morphism = 0; 488 // Precompute morphism for the possible fixup 489 for (uint i = 0; i < call->row_limit(); i++) { 490 ciKlass* receiver = call->receiver(i); 491 if (receiver == NULL) continue; 492 morphism++; 493 } 494 int epsilon = 0; 495 if (TieredCompilation && ProfileInterpreter) { 496 // Interpreter and C1 treat final and special invokes differently. 497 // C1 will record a type, whereas the interpreter will just 498 // increment the count. Detect this case. 499 if (morphism == 1 && count > 0) { 500 epsilon = count; 501 count = 0; 502 } 503 } 504 for (uint i = 0; i < call->row_limit(); i++) { 505 ciKlass* receiver = call->receiver(i); 506 if (receiver == NULL) continue; 507 int rcount = call->receiver_count(i) + epsilon; 508 if (rcount == 0) rcount = 1; // Should be valid value 509 receivers_count_total += rcount; 510 // Add the receiver to result data. 511 result.add_receiver(receiver, rcount); 512 // If we extend profiling to record methods, 513 // we will set result._method also. 514 } 515 // Determine call site's morphism. 516 // The call site count is 0 with known morphism (onlt 1 or 2 receivers) 517 // or < 0 in the case of a type check failured for checkcast, aastore, instanceof. 518 // The call site count is > 0 in the case of a polymorphic virtual call. 519 if (morphism > 0 && morphism == result._limit) { 520 // The morphism <= MorphismLimit. 521 if ((morphism < ciCallProfile::MorphismLimit) || 522 (morphism == ciCallProfile::MorphismLimit && count == 0)) { 523 #ifdef ASSERT 524 if (count > 0) { 525 this->print_short_name(tty); 526 tty->print_cr(" @ bci:%d", bci); 527 this->print_codes(); 528 assert(false, "this call site should not be polymorphic"); 529 } 530 #endif 531 result._morphism = morphism; 532 } 533 } 534 // Make the count consistent if this is a call profile. If count is 535 // zero or less, presume that this is a typecheck profile and 536 // do nothing. Otherwise, increase count to be the sum of all 537 // receiver's counts. 538 if (count >= 0) { 539 count += receivers_count_total; 540 } 541 } 542 result._count = count; 543 } 544 } 545 return result; 546 } 547 548 // ------------------------------------------------------------------ 549 // Add new receiver and sort data by receiver's profile count. 550 void ciCallProfile::add_receiver(ciKlass* receiver, int receiver_count) { 551 // Add new receiver and sort data by receiver's counts when we have space 552 // for it otherwise replace the less called receiver (less called receiver 553 // is placed to the last array element which is not used). 554 // First array's element contains most called receiver. 555 int i = _limit; 556 for (; i > 0 && receiver_count > _receiver_count[i-1]; i--) { 557 _receiver[i] = _receiver[i-1]; 558 _receiver_count[i] = _receiver_count[i-1]; 559 } 560 _receiver[i] = receiver; 561 _receiver_count[i] = receiver_count; 562 if (_limit < MorphismLimit) _limit++; 563 } 564 565 // ------------------------------------------------------------------ 566 // ciMethod::find_monomorphic_target 567 // 568 // Given a certain calling environment, find the monomorphic target 569 // for the call. Return NULL if the call is not monomorphic in 570 // its calling environment, or if there are only abstract methods. 571 // The returned method is never abstract. 572 // Note: If caller uses a non-null result, it must inform dependencies 573 // via assert_unique_concrete_method or assert_leaf_type. 574 ciMethod* ciMethod::find_monomorphic_target(ciInstanceKlass* caller, 575 ciInstanceKlass* callee_holder, 576 ciInstanceKlass* actual_recv) { 577 check_is_loaded(); 578 579 if (actual_recv->is_interface()) { 580 // %%% We cannot trust interface types, yet. See bug 6312651. 581 return NULL; 582 } 583 584 ciMethod* root_m = resolve_invoke(caller, actual_recv); 585 if (root_m == NULL) { 586 // Something went wrong looking up the actual receiver method. 587 return NULL; 588 } 589 assert(!root_m->is_abstract(), "resolve_invoke promise"); 590 591 // Make certain quick checks even if UseCHA is false. 592 593 // Is it private or final? 594 if (root_m->can_be_statically_bound()) { 595 return root_m; 596 } 597 598 if (actual_recv->is_leaf_type() && actual_recv == root_m->holder()) { 599 // Easy case. There is no other place to put a method, so don't bother 600 // to go through the VM_ENTRY_MARK and all the rest. 601 return root_m; 602 } 603 604 // Array methods (clone, hashCode, etc.) are always statically bound. 605 // If we were to see an array type here, we'd return root_m. 606 // However, this method processes only ciInstanceKlasses. (See 4962591.) 607 // The inline_native_clone intrinsic narrows Object to T[] properly, 608 // so there is no need to do the same job here. 609 610 if (!UseCHA) return NULL; 611 612 VM_ENTRY_MARK; 613 614 methodHandle target; 615 { 616 MutexLocker locker(Compile_lock); 617 Klass* context = actual_recv->get_Klass(); 618 target = Dependencies::find_unique_concrete_method(context, 619 root_m->get_Method()); 620 // %%% Should upgrade this ciMethod API to look for 1 or 2 concrete methods. 621 } 622 623 #ifndef PRODUCT 624 if (TraceDependencies && target() != NULL && target() != root_m->get_Method()) { 625 tty->print("found a non-root unique target method"); 626 tty->print_cr(" context = %s", InstanceKlass::cast(actual_recv->get_Klass())->external_name()); 627 tty->print(" method = "); 628 target->print_short_name(tty); 629 tty->cr(); 630 } 631 #endif //PRODUCT 632 633 if (target() == NULL) { 634 return NULL; 635 } 636 if (target() == root_m->get_Method()) { 637 return root_m; 638 } 639 if (!root_m->is_public() && 640 !root_m->is_protected()) { 641 // If we are going to reason about inheritance, it's easiest 642 // if the method in question is public, protected, or private. 643 // If the answer is not root_m, it is conservatively correct 644 // to return NULL, even if the CHA encountered irrelevant 645 // methods in other packages. 646 // %%% TO DO: Work out logic for package-private methods 647 // with the same name but different vtable indexes. 648 return NULL; 649 } 650 return CURRENT_THREAD_ENV->get_method(target()); 651 } 652 653 // ------------------------------------------------------------------ 654 // ciMethod::resolve_invoke 655 // 656 // Given a known receiver klass, find the target for the call. 657 // Return NULL if the call has no target or the target is abstract. 658 ciMethod* ciMethod::resolve_invoke(ciKlass* caller, ciKlass* exact_receiver) { 659 check_is_loaded(); 660 VM_ENTRY_MARK; 661 662 KlassHandle caller_klass (THREAD, caller->get_Klass()); 663 KlassHandle h_recv (THREAD, exact_receiver->get_Klass()); 664 KlassHandle h_resolved (THREAD, holder()->get_Klass()); 665 Symbol* h_name = name()->get_symbol(); 666 Symbol* h_signature = signature()->get_symbol(); 667 668 methodHandle m; 669 // Only do exact lookup if receiver klass has been linked. Otherwise, 670 // the vtable has not been setup, and the LinkResolver will fail. 671 if (h_recv->oop_is_array() 672 || 673 InstanceKlass::cast(h_recv())->is_linked() && !exact_receiver->is_interface()) { 674 if (holder()->is_interface()) { 675 m = LinkResolver::resolve_interface_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 676 } else { 677 m = LinkResolver::resolve_virtual_call_or_null(h_recv, h_resolved, h_name, h_signature, caller_klass); 678 } 679 } 680 681 if (m.is_null()) { 682 // Return NULL only if there was a problem with lookup (uninitialized class, etc.) 683 return NULL; 684 } 685 686 ciMethod* result = this; 687 if (m() != get_Method()) { 688 result = CURRENT_THREAD_ENV->get_method(m()); 689 } 690 691 // Don't return abstract methods because they aren't 692 // optimizable or interesting. 693 if (result->is_abstract()) { 694 return NULL; 695 } else { 696 return result; 697 } 698 } 699 700 // ------------------------------------------------------------------ 701 // ciMethod::resolve_vtable_index 702 // 703 // Given a known receiver klass, find the vtable index for the call. 704 // Return Method::invalid_vtable_index if the vtable_index is unknown. 705 int ciMethod::resolve_vtable_index(ciKlass* caller, ciKlass* receiver) { 706 check_is_loaded(); 707 708 int vtable_index = Method::invalid_vtable_index; 709 // Only do lookup if receiver klass has been linked. Otherwise, 710 // the vtable has not been setup, and the LinkResolver will fail. 711 if (!receiver->is_interface() 712 && (!receiver->is_instance_klass() || 713 receiver->as_instance_klass()->is_linked())) { 714 VM_ENTRY_MARK; 715 716 KlassHandle caller_klass (THREAD, caller->get_Klass()); 717 KlassHandle h_recv (THREAD, receiver->get_Klass()); 718 Symbol* h_name = name()->get_symbol(); 719 Symbol* h_signature = signature()->get_symbol(); 720 721 vtable_index = LinkResolver::resolve_virtual_vtable_index(h_recv, h_recv, h_name, h_signature, caller_klass); 722 if (vtable_index == Method::nonvirtual_vtable_index) { 723 // A statically bound method. Return "no such index". 724 vtable_index = Method::invalid_vtable_index; 725 } 726 } 727 728 return vtable_index; 729 } 730 731 // ------------------------------------------------------------------ 732 // ciMethod::interpreter_call_site_count 733 int ciMethod::interpreter_call_site_count(int bci) { 734 if (method_data() != NULL) { 735 ResourceMark rm; 736 ciProfileData* data = method_data()->bci_to_data(bci); 737 if (data != NULL && data->is_CounterData()) { 738 return scale_count(data->as_CounterData()->count()); 739 } 740 } 741 return -1; // unknown 742 } 743 744 // ------------------------------------------------------------------ 745 // ciMethod::get_field_at_bci 746 ciField* ciMethod::get_field_at_bci(int bci, bool &will_link) { 747 ciBytecodeStream iter(this); 748 iter.reset_to_bci(bci); 749 iter.next(); 750 return iter.get_field(will_link); 751 } 752 753 // ------------------------------------------------------------------ 754 // ciMethod::get_method_at_bci 755 ciMethod* ciMethod::get_method_at_bci(int bci, bool &will_link, ciSignature* *declared_signature) { 756 ciBytecodeStream iter(this); 757 iter.reset_to_bci(bci); 758 iter.next(); 759 return iter.get_method(will_link, declared_signature); 760 } 761 762 // ------------------------------------------------------------------ 763 // Adjust a CounterData count to be commensurate with 764 // interpreter_invocation_count. If the MDO exists for 765 // only 25% of the time the method exists, then the 766 // counts in the MDO should be scaled by 4X, so that 767 // they can be usefully and stably compared against the 768 // invocation counts in methods. 769 int ciMethod::scale_count(int count, float prof_factor) { 770 if (count > 0 && method_data() != NULL) { 771 int counter_life; 772 int method_life = interpreter_invocation_count(); 773 if (TieredCompilation) { 774 // In tiered the MDO's life is measured directly, so just use the snapshotted counters 775 counter_life = MAX2(method_data()->invocation_count(), method_data()->backedge_count()); 776 } else { 777 int current_mileage = method_data()->current_mileage(); 778 int creation_mileage = method_data()->creation_mileage(); 779 counter_life = current_mileage - creation_mileage; 780 } 781 782 // counter_life due to backedge_counter could be > method_life 783 if (counter_life > method_life) 784 counter_life = method_life; 785 if (0 < counter_life && counter_life <= method_life) { 786 count = (int)((double)count * prof_factor * method_life / counter_life + 0.5); 787 count = (count > 0) ? count : 1; 788 } 789 } 790 return count; 791 } 792 793 794 // ------------------------------------------------------------------ 795 // ciMethod::is_special_get_caller_class_method 796 // 797 bool ciMethod::is_ignored_by_security_stack_walk() const { 798 check_is_loaded(); 799 VM_ENTRY_MARK; 800 return get_Method()->is_ignored_by_security_stack_walk(); 801 } 802 803 804 // ------------------------------------------------------------------ 805 // invokedynamic support 806 807 // ------------------------------------------------------------------ 808 // ciMethod::is_method_handle_intrinsic 809 // 810 // Return true if the method is an instance of the JVM-generated 811 // signature-polymorphic MethodHandle methods, _invokeBasic, _linkToVirtual, etc. 812 bool ciMethod::is_method_handle_intrinsic() const { 813 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 814 return (MethodHandles::is_signature_polymorphic(iid) && 815 MethodHandles::is_signature_polymorphic_intrinsic(iid)); 816 } 817 818 // ------------------------------------------------------------------ 819 // ciMethod::is_compiled_lambda_form 820 // 821 // Return true if the method is a generated MethodHandle adapter. 822 // These are built by Java code. 823 bool ciMethod::is_compiled_lambda_form() const { 824 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 825 return iid == vmIntrinsics::_compiledLambdaForm; 826 } 827 828 // ------------------------------------------------------------------ 829 // ciMethod::has_member_arg 830 // 831 // Return true if the method is a linker intrinsic like _linkToVirtual. 832 // These are built by the JVM. 833 bool ciMethod::has_member_arg() const { 834 vmIntrinsics::ID iid = _intrinsic_id; // do not check if loaded 835 return (MethodHandles::is_signature_polymorphic(iid) && 836 MethodHandles::has_member_arg(iid)); 837 } 838 839 // ------------------------------------------------------------------ 840 // ciMethod::ensure_method_data 841 // 842 // Generate new MethodData* objects at compile time. 843 // Return true if allocation was successful or no MDO is required. 844 bool ciMethod::ensure_method_data(methodHandle h_m) { 845 EXCEPTION_CONTEXT; 846 if (is_native() || is_abstract() || h_m()->is_accessor()) return true; 847 if (h_m()->method_data() == NULL) { 848 Method::build_interpreter_method_data(h_m, THREAD); 849 if (HAS_PENDING_EXCEPTION) { 850 CLEAR_PENDING_EXCEPTION; 851 } 852 } 853 if (h_m()->method_data() != NULL) { 854 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 855 _method_data->load_data(); 856 return true; 857 } else { 858 _method_data = CURRENT_ENV->get_empty_methodData(); 859 return false; 860 } 861 } 862 863 // public, retroactive version 864 bool ciMethod::ensure_method_data() { 865 bool result = true; 866 if (_method_data == NULL || _method_data->is_empty()) { 867 GUARDED_VM_ENTRY({ 868 result = ensure_method_data(get_Method()); 869 }); 870 } 871 return result; 872 } 873 874 875 // ------------------------------------------------------------------ 876 // ciMethod::method_data 877 // 878 ciMethodData* ciMethod::method_data() { 879 if (_method_data != NULL) { 880 return _method_data; 881 } 882 VM_ENTRY_MARK; 883 ciEnv* env = CURRENT_ENV; 884 Thread* my_thread = JavaThread::current(); 885 methodHandle h_m(my_thread, get_Method()); 886 887 if (h_m()->method_data() != NULL) { 888 _method_data = CURRENT_ENV->get_method_data(h_m()->method_data()); 889 _method_data->load_data(); 890 } else { 891 _method_data = CURRENT_ENV->get_empty_methodData(); 892 } 893 return _method_data; 894 895 } 896 897 // ------------------------------------------------------------------ 898 // ciMethod::method_data_or_null 899 // Returns a pointer to ciMethodData if MDO exists on the VM side, 900 // NULL otherwise. 901 ciMethodData* ciMethod::method_data_or_null() { 902 ciMethodData *md = method_data(); 903 if (md->is_empty()) return NULL; 904 return md; 905 } 906 907 // ------------------------------------------------------------------ 908 // ciMethod::ensure_method_counters 909 // 910 address ciMethod::ensure_method_counters() { 911 check_is_loaded(); 912 VM_ENTRY_MARK; 913 methodHandle mh(THREAD, get_Method()); 914 MethodCounters *counter = mh->method_counters(); 915 if (counter == NULL) { 916 counter = Method::build_method_counters(mh(), CHECK_AND_CLEAR_NULL); 917 } 918 return (address)counter; 919 } 920 921 // ------------------------------------------------------------------ 922 // ciMethod::should_exclude 923 // 924 // Should this method be excluded from compilation? 925 bool ciMethod::should_exclude() { 926 check_is_loaded(); 927 VM_ENTRY_MARK; 928 methodHandle mh(THREAD, get_Method()); 929 bool ignore; 930 return CompilerOracle::should_exclude(mh, ignore); 931 } 932 933 // ------------------------------------------------------------------ 934 // ciMethod::should_inline 935 // 936 // Should this method be inlined during compilation? 937 bool ciMethod::should_inline() { 938 check_is_loaded(); 939 VM_ENTRY_MARK; 940 methodHandle mh(THREAD, get_Method()); 941 return CompilerOracle::should_inline(mh); 942 } 943 944 // ------------------------------------------------------------------ 945 // ciMethod::should_not_inline 946 // 947 // Should this method be disallowed from inlining during compilation? 948 bool ciMethod::should_not_inline() { 949 check_is_loaded(); 950 VM_ENTRY_MARK; 951 methodHandle mh(THREAD, get_Method()); 952 return CompilerOracle::should_not_inline(mh); 953 } 954 955 // ------------------------------------------------------------------ 956 // ciMethod::should_print_assembly 957 // 958 // Should the compiler print the generated code for this method? 959 bool ciMethod::should_print_assembly() { 960 check_is_loaded(); 961 VM_ENTRY_MARK; 962 methodHandle mh(THREAD, get_Method()); 963 return CompilerOracle::should_print(mh); 964 } 965 966 // ------------------------------------------------------------------ 967 // ciMethod::break_at_execute 968 // 969 // Should the compiler insert a breakpoint into the generated code 970 // method? 971 bool ciMethod::break_at_execute() { 972 check_is_loaded(); 973 VM_ENTRY_MARK; 974 methodHandle mh(THREAD, get_Method()); 975 return CompilerOracle::should_break_at(mh); 976 } 977 978 // ------------------------------------------------------------------ 979 // ciMethod::has_option 980 // 981 bool ciMethod::has_option(const char* option) { 982 check_is_loaded(); 983 VM_ENTRY_MARK; 984 methodHandle mh(THREAD, get_Method()); 985 return CompilerOracle::has_option_string(mh, option); 986 } 987 988 // ------------------------------------------------------------------ 989 // ciMethod::can_be_compiled 990 // 991 // Have previous compilations of this method succeeded? 992 bool ciMethod::can_be_compiled() { 993 check_is_loaded(); 994 ciEnv* env = CURRENT_ENV; 995 if (is_c1_compile(env->comp_level())) { 996 return _is_c1_compilable; 997 } 998 return _is_c2_compilable; 999 } 1000 1001 // ------------------------------------------------------------------ 1002 // ciMethod::set_not_compilable 1003 // 1004 // Tell the VM that this method cannot be compiled at all. 1005 void ciMethod::set_not_compilable(const char* reason) { 1006 check_is_loaded(); 1007 VM_ENTRY_MARK; 1008 ciEnv* env = CURRENT_ENV; 1009 if (is_c1_compile(env->comp_level())) { 1010 _is_c1_compilable = false; 1011 } else { 1012 _is_c2_compilable = false; 1013 } 1014 get_Method()->set_not_compilable(env->comp_level(), true, reason); 1015 } 1016 1017 // ------------------------------------------------------------------ 1018 // ciMethod::can_be_osr_compiled 1019 // 1020 // Have previous compilations of this method succeeded? 1021 // 1022 // Implementation note: the VM does not currently keep track 1023 // of failed OSR compilations per bci. The entry_bci parameter 1024 // is currently unused. 1025 bool ciMethod::can_be_osr_compiled(int entry_bci) { 1026 check_is_loaded(); 1027 VM_ENTRY_MARK; 1028 ciEnv* env = CURRENT_ENV; 1029 return !get_Method()->is_not_osr_compilable(env->comp_level()); 1030 } 1031 1032 // ------------------------------------------------------------------ 1033 // ciMethod::has_compiled_code 1034 bool ciMethod::has_compiled_code() { 1035 return instructions_size() > 0; 1036 } 1037 1038 int ciMethod::comp_level() { 1039 check_is_loaded(); 1040 VM_ENTRY_MARK; 1041 nmethod* nm = get_Method()->code(); 1042 if (nm != NULL) return nm->comp_level(); 1043 return 0; 1044 } 1045 1046 int ciMethod::highest_osr_comp_level() { 1047 check_is_loaded(); 1048 VM_ENTRY_MARK; 1049 return get_Method()->highest_osr_comp_level(); 1050 } 1051 1052 // ------------------------------------------------------------------ 1053 // ciMethod::code_size_for_inlining 1054 // 1055 // Code size for inlining decisions. This method returns a code 1056 // size of 1 for methods which has the ForceInline annotation. 1057 int ciMethod::code_size_for_inlining() { 1058 check_is_loaded(); 1059 if (get_Method()->force_inline()) { 1060 return 1; 1061 } 1062 return code_size(); 1063 } 1064 1065 // ------------------------------------------------------------------ 1066 // ciMethod::instructions_size 1067 // 1068 // This is a rough metric for "fat" methods, compared before inlining 1069 // with InlineSmallCode. The CodeBlob::code_size accessor includes 1070 // junk like exception handler, stubs, and constant table, which are 1071 // not highly relevant to an inlined method. So we use the more 1072 // specific accessor nmethod::insts_size. 1073 int ciMethod::instructions_size() { 1074 if (_instructions_size == -1) { 1075 GUARDED_VM_ENTRY( 1076 nmethod* code = get_Method()->code(); 1077 if (code != NULL && (code->comp_level() == CompLevel_full_optimization)) { 1078 _instructions_size = code->insts_end() - code->verified_entry_point(); 1079 } else { 1080 _instructions_size = 0; 1081 } 1082 ); 1083 } 1084 return _instructions_size; 1085 } 1086 1087 // ------------------------------------------------------------------ 1088 // ciMethod::log_nmethod_identity 1089 void ciMethod::log_nmethod_identity(xmlStream* log) { 1090 GUARDED_VM_ENTRY( 1091 nmethod* code = get_Method()->code(); 1092 if (code != NULL) { 1093 code->log_identity(log); 1094 } 1095 ) 1096 } 1097 1098 // ------------------------------------------------------------------ 1099 // ciMethod::is_not_reached 1100 bool ciMethod::is_not_reached(int bci) { 1101 check_is_loaded(); 1102 VM_ENTRY_MARK; 1103 return Interpreter::is_not_reached( 1104 methodHandle(THREAD, get_Method()), bci); 1105 } 1106 1107 // ------------------------------------------------------------------ 1108 // ciMethod::was_never_executed 1109 bool ciMethod::was_executed_more_than(int times) { 1110 VM_ENTRY_MARK; 1111 return get_Method()->was_executed_more_than(times); 1112 } 1113 1114 // ------------------------------------------------------------------ 1115 // ciMethod::has_unloaded_classes_in_signature 1116 bool ciMethod::has_unloaded_classes_in_signature() { 1117 VM_ENTRY_MARK; 1118 { 1119 EXCEPTION_MARK; 1120 methodHandle m(THREAD, get_Method()); 1121 bool has_unloaded = Method::has_unloaded_classes_in_signature(m, (JavaThread *)THREAD); 1122 if( HAS_PENDING_EXCEPTION ) { 1123 CLEAR_PENDING_EXCEPTION; 1124 return true; // Declare that we may have unloaded classes 1125 } 1126 return has_unloaded; 1127 } 1128 } 1129 1130 // ------------------------------------------------------------------ 1131 // ciMethod::is_klass_loaded 1132 bool ciMethod::is_klass_loaded(int refinfo_index, bool must_be_resolved) const { 1133 VM_ENTRY_MARK; 1134 return get_Method()->is_klass_loaded(refinfo_index, must_be_resolved); 1135 } 1136 1137 // ------------------------------------------------------------------ 1138 // ciMethod::check_call 1139 bool ciMethod::check_call(int refinfo_index, bool is_static) const { 1140 VM_ENTRY_MARK; 1141 { 1142 EXCEPTION_MARK; 1143 HandleMark hm(THREAD); 1144 constantPoolHandle pool (THREAD, get_Method()->constants()); 1145 methodHandle spec_method; 1146 KlassHandle spec_klass; 1147 Bytecodes::Code code = (is_static ? Bytecodes::_invokestatic : Bytecodes::_invokevirtual); 1148 LinkResolver::resolve_method_statically(spec_method, spec_klass, code, pool, refinfo_index, THREAD); 1149 if (HAS_PENDING_EXCEPTION) { 1150 CLEAR_PENDING_EXCEPTION; 1151 return false; 1152 } else { 1153 return (spec_method->is_static() == is_static); 1154 } 1155 } 1156 return false; 1157 } 1158 1159 // ------------------------------------------------------------------ 1160 // ciMethod::print_codes 1161 // 1162 // Print the bytecodes for this method. 1163 void ciMethod::print_codes_on(outputStream* st) { 1164 check_is_loaded(); 1165 GUARDED_VM_ENTRY(get_Method()->print_codes_on(st);) 1166 } 1167 1168 1169 #define FETCH_FLAG_FROM_VM(flag_accessor) { \ 1170 check_is_loaded(); \ 1171 VM_ENTRY_MARK; \ 1172 return get_Method()->flag_accessor(); \ 1173 } 1174 1175 bool ciMethod::is_empty_method() const { FETCH_FLAG_FROM_VM(is_empty_method); } 1176 bool ciMethod::is_vanilla_constructor() const { FETCH_FLAG_FROM_VM(is_vanilla_constructor); } 1177 bool ciMethod::has_loops () const { FETCH_FLAG_FROM_VM(has_loops); } 1178 bool ciMethod::has_jsrs () const { FETCH_FLAG_FROM_VM(has_jsrs); } 1179 bool ciMethod::is_accessor () const { FETCH_FLAG_FROM_VM(is_accessor); } 1180 bool ciMethod::is_initializer () const { FETCH_FLAG_FROM_VM(is_initializer); } 1181 1182 bool ciMethod::is_boxing_method() const { 1183 if (holder()->is_box_klass()) { 1184 switch (intrinsic_id()) { 1185 case vmIntrinsics::_Boolean_valueOf: 1186 case vmIntrinsics::_Byte_valueOf: 1187 case vmIntrinsics::_Character_valueOf: 1188 case vmIntrinsics::_Short_valueOf: 1189 case vmIntrinsics::_Integer_valueOf: 1190 case vmIntrinsics::_Long_valueOf: 1191 case vmIntrinsics::_Float_valueOf: 1192 case vmIntrinsics::_Double_valueOf: 1193 return true; 1194 default: 1195 return false; 1196 } 1197 } 1198 return false; 1199 } 1200 1201 bool ciMethod::is_unboxing_method() const { 1202 if (holder()->is_box_klass()) { 1203 switch (intrinsic_id()) { 1204 case vmIntrinsics::_booleanValue: 1205 case vmIntrinsics::_byteValue: 1206 case vmIntrinsics::_charValue: 1207 case vmIntrinsics::_shortValue: 1208 case vmIntrinsics::_intValue: 1209 case vmIntrinsics::_longValue: 1210 case vmIntrinsics::_floatValue: 1211 case vmIntrinsics::_doubleValue: 1212 return true; 1213 default: 1214 return false; 1215 } 1216 } 1217 return false; 1218 } 1219 1220 BCEscapeAnalyzer *ciMethod::get_bcea() { 1221 #ifdef COMPILER2 1222 if (_bcea == NULL) { 1223 _bcea = new (CURRENT_ENV->arena()) BCEscapeAnalyzer(this, NULL); 1224 } 1225 return _bcea; 1226 #else // COMPILER2 1227 ShouldNotReachHere(); 1228 return NULL; 1229 #endif // COMPILER2 1230 } 1231 1232 ciMethodBlocks *ciMethod::get_method_blocks() { 1233 Arena *arena = CURRENT_ENV->arena(); 1234 if (_method_blocks == NULL) { 1235 _method_blocks = new (arena) ciMethodBlocks(arena, this); 1236 } 1237 return _method_blocks; 1238 } 1239 1240 #undef FETCH_FLAG_FROM_VM 1241 1242 void ciMethod::dump_replay_data(outputStream* st) { 1243 ASSERT_IN_VM; 1244 ResourceMark rm; 1245 Method* method = get_Method(); 1246 MethodCounters* mcs = method->method_counters(); 1247 Klass* holder = method->method_holder(); 1248 st->print_cr("ciMethod %s %s %s %d %d %d %d %d", 1249 holder->name()->as_quoted_ascii(), 1250 method->name()->as_quoted_ascii(), 1251 method->signature()->as_quoted_ascii(), 1252 mcs == NULL ? 0 : mcs->invocation_counter()->raw_counter(), 1253 mcs == NULL ? 0 : mcs->backedge_counter()->raw_counter(), 1254 interpreter_invocation_count(), 1255 interpreter_throwout_count(), 1256 _instructions_size); 1257 } 1258 1259 // ------------------------------------------------------------------ 1260 // ciMethod::print_codes 1261 // 1262 // Print a range of the bytecodes for this method. 1263 void ciMethod::print_codes_on(int from, int to, outputStream* st) { 1264 check_is_loaded(); 1265 GUARDED_VM_ENTRY(get_Method()->print_codes_on(from, to, st);) 1266 } 1267 1268 // ------------------------------------------------------------------ 1269 // ciMethod::print_name 1270 // 1271 // Print the name of this method, including signature and some flags. 1272 void ciMethod::print_name(outputStream* st) { 1273 check_is_loaded(); 1274 GUARDED_VM_ENTRY(get_Method()->print_name(st);) 1275 } 1276 1277 // ------------------------------------------------------------------ 1278 // ciMethod::print_short_name 1279 // 1280 // Print the name of this method, without signature. 1281 void ciMethod::print_short_name(outputStream* st) { 1282 if (is_loaded()) { 1283 GUARDED_VM_ENTRY(get_Method()->print_short_name(st);); 1284 } else { 1285 // Fall back if method is not loaded. 1286 holder()->print_name_on(st); 1287 st->print("::"); 1288 name()->print_symbol_on(st); 1289 if (WizardMode) 1290 signature()->as_symbol()->print_symbol_on(st); 1291 } 1292 } 1293 1294 // ------------------------------------------------------------------ 1295 // ciMethod::print_impl 1296 // 1297 // Implementation of the print method. 1298 void ciMethod::print_impl(outputStream* st) { 1299 ciMetadata::print_impl(st); 1300 st->print(" name="); 1301 name()->print_symbol_on(st); 1302 st->print(" holder="); 1303 holder()->print_name_on(st); 1304 st->print(" signature="); 1305 signature()->as_symbol()->print_symbol_on(st); 1306 if (is_loaded()) { 1307 st->print(" loaded=true"); 1308 st->print(" arg_size=%d", arg_size()); 1309 st->print(" flags="); 1310 flags().print_member_flags(st); 1311 } else { 1312 st->print(" loaded=false"); 1313 } 1314 }