class.cc revision 83c8ee000d525017ead8753fce6bc1020249b96a
1/* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "class.h" 18 19#include "art_field-inl.h" 20#include "art_method-inl.h" 21#include "class-inl.h" 22#include "class_linker.h" 23#include "class_loader.h" 24#include "dex_cache.h" 25#include "dex_file-inl.h" 26#include "gc/accounting/card_table-inl.h" 27#include "object-inl.h" 28#include "object_array-inl.h" 29#include "object_utils.h" 30#include "runtime.h" 31#include "sirt_ref.h" 32#include "thread.h" 33#include "throwable.h" 34#include "utils.h" 35#include "well_known_classes.h" 36 37namespace art { 38namespace mirror { 39 40Class* Class::java_lang_Class_ = NULL; 41 42void Class::SetClassClass(Class* java_lang_Class) { 43 CHECK(java_lang_Class_ == NULL) << java_lang_Class_ << " " << java_lang_Class; 44 CHECK(java_lang_Class != NULL); 45 java_lang_Class_ = java_lang_Class; 46} 47 48void Class::ResetClass() { 49 CHECK(java_lang_Class_ != NULL); 50 java_lang_Class_ = NULL; 51} 52 53void Class::VisitRoots(RootCallback* callback, void* arg) { 54 if (java_lang_Class_ != nullptr) { 55 java_lang_Class_ = down_cast<Class*>( 56 callback(java_lang_Class_, arg, 0, kRootStickyClass)); 57 } 58} 59 60void Class::SetStatus(Status new_status, Thread* self) { 61 Status old_status = GetStatus(); 62 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 63 bool class_linker_initialized = class_linker != nullptr && class_linker->IsInitialized(); 64 if (LIKELY(class_linker_initialized)) { 65 if (UNLIKELY(new_status <= old_status && new_status != kStatusError)) { 66 LOG(FATAL) << "Unexpected change back of class status for " << PrettyClass(this) << " " 67 << old_status << " -> " << new_status; 68 } 69 if (new_status >= kStatusResolved || old_status >= kStatusResolved) { 70 // When classes are being resolved the resolution code should hold the lock. 71 CHECK_EQ(GetLockOwnerThreadId(), self->GetThreadId()) 72 << "Attempt to change status of class while not holding its lock: " 73 << PrettyClass(this) << " " << old_status << " -> " << new_status; 74 } 75 } 76 if (new_status == kStatusError) { 77 CHECK_NE(GetStatus(), kStatusError) 78 << "Attempt to set as erroneous an already erroneous class " << PrettyClass(this); 79 80 // Stash current exception. 81 SirtRef<mirror::Object> old_throw_this_object(self, NULL); 82 SirtRef<mirror::ArtMethod> old_throw_method(self, NULL); 83 SirtRef<mirror::Throwable> old_exception(self, NULL); 84 uint32_t old_throw_dex_pc; 85 { 86 ThrowLocation old_throw_location; 87 mirror::Throwable* old_exception_obj = self->GetException(&old_throw_location); 88 old_throw_this_object.reset(old_throw_location.GetThis()); 89 old_throw_method.reset(old_throw_location.GetMethod()); 90 old_exception.reset(old_exception_obj); 91 old_throw_dex_pc = old_throw_location.GetDexPc(); 92 self->ClearException(); 93 } 94 CHECK(old_exception.get() != NULL); 95 96 // clear exception to call FindSystemClass 97 self->ClearException(); 98 ClassLinker* class_linker = Runtime::Current()->GetClassLinker(); 99 Class* eiie_class = class_linker->FindSystemClass("Ljava/lang/ExceptionInInitializerError;"); 100 CHECK(!self->IsExceptionPending()); 101 102 // Only verification errors, not initialization problems, should set a verify error. 103 // This is to ensure that ThrowEarlierClassFailure will throw NoClassDefFoundError in that case. 104 Class* exception_class = old_exception->GetClass(); 105 if (!eiie_class->IsAssignableFrom(exception_class)) { 106 SetVerifyErrorClass(exception_class); 107 } 108 109 // Restore exception. 110 ThrowLocation gc_safe_throw_location(old_throw_this_object.get(), old_throw_method.get(), 111 old_throw_dex_pc); 112 113 self->SetException(gc_safe_throw_location, old_exception.get()); 114 } 115 CHECK(sizeof(Status) == sizeof(uint32_t)) << PrettyClass(this); 116 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, status_), new_status, false); 117 // Classes that are being resolved or initialized need to notify waiters that the class status 118 // changed. See ClassLinker::EnsureResolved and ClassLinker::WaitForInitializeClass. 119 if ((old_status >= kStatusResolved || new_status >= kStatusResolved) && 120 class_linker_initialized) { 121 NotifyAll(self); 122 } 123} 124 125void Class::SetDexCache(DexCache* new_dex_cache) { 126 SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), new_dex_cache, false); 127} 128 129void Class::SetClassSize(uint32_t new_class_size) { 130 if (kIsDebugBuild && (new_class_size < GetClassSize())) { 131 DumpClass(LOG(ERROR), kDumpClassFullDetail); 132 CHECK_GE(new_class_size, GetClassSize()) << " class=" << PrettyTypeOf(this); 133 } 134 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, class_size_), new_class_size, false); 135} 136 137// Return the class' name. The exact format is bizarre, but it's the specified behavior for 138// Class.getName: keywords for primitive types, regular "[I" form for primitive arrays (so "int" 139// but "[I"), and arrays of reference types written between "L" and ";" but with dots rather than 140// slashes (so "java.lang.String" but "[Ljava.lang.String;"). Madness. 141String* Class::ComputeName() { 142 String* name = GetName(); 143 if (name != nullptr) { 144 return name; 145 } 146 Thread* self = Thread::Current(); 147 SirtRef<mirror::Class> sirt_c(self, this); 148 std::string descriptor(ClassHelper(this).GetDescriptor()); 149 if ((descriptor[0] != 'L') && (descriptor[0] != '[')) { 150 // The descriptor indicates that this is the class for 151 // a primitive type; special-case the return value. 152 const char* c_name = NULL; 153 switch (descriptor[0]) { 154 case 'Z': c_name = "boolean"; break; 155 case 'B': c_name = "byte"; break; 156 case 'C': c_name = "char"; break; 157 case 'S': c_name = "short"; break; 158 case 'I': c_name = "int"; break; 159 case 'J': c_name = "long"; break; 160 case 'F': c_name = "float"; break; 161 case 'D': c_name = "double"; break; 162 case 'V': c_name = "void"; break; 163 default: 164 LOG(FATAL) << "Unknown primitive type: " << PrintableChar(descriptor[0]); 165 } 166 name = String::AllocFromModifiedUtf8(self, c_name); 167 } else { 168 // Convert the UTF-8 name to a java.lang.String. The name must use '.' to separate package 169 // components. 170 if (descriptor.size() > 2 && descriptor[0] == 'L' && descriptor[descriptor.size() - 1] == ';') { 171 descriptor.erase(0, 1); 172 descriptor.erase(descriptor.size() - 1); 173 } 174 std::replace(descriptor.begin(), descriptor.end(), '/', '.'); 175 name = String::AllocFromModifiedUtf8(self, descriptor.c_str()); 176 } 177 sirt_c->SetName(name); 178 return name; 179} 180 181void Class::DumpClass(std::ostream& os, int flags) { 182 if ((flags & kDumpClassFullDetail) == 0) { 183 os << PrettyClass(this); 184 if ((flags & kDumpClassClassLoader) != 0) { 185 os << ' ' << GetClassLoader(); 186 } 187 if ((flags & kDumpClassInitialized) != 0) { 188 os << ' ' << GetStatus(); 189 } 190 os << "\n"; 191 return; 192 } 193 194 Class* super = GetSuperClass(); 195 ClassHelper kh(this); 196 os << "----- " << (IsInterface() ? "interface" : "class") << " " 197 << "'" << kh.GetDescriptor() << "' cl=" << GetClassLoader() << " -----\n", 198 os << " objectSize=" << SizeOf() << " " 199 << "(" << (super != NULL ? super->SizeOf() : -1) << " from super)\n", 200 os << StringPrintf(" access=0x%04x.%04x\n", 201 GetAccessFlags() >> 16, GetAccessFlags() & kAccJavaFlagsMask); 202 if (super != NULL) { 203 os << " super='" << PrettyClass(super) << "' (cl=" << super->GetClassLoader() << ")\n"; 204 } 205 if (IsArrayClass()) { 206 os << " componentType=" << PrettyClass(GetComponentType()) << "\n"; 207 } 208 if (kh.NumDirectInterfaces() > 0) { 209 os << " interfaces (" << kh.NumDirectInterfaces() << "):\n"; 210 for (size_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 211 Class* interface = kh.GetDirectInterface(i); 212 const ClassLoader* cl = interface->GetClassLoader(); 213 os << StringPrintf(" %2zd: %s (cl=%p)\n", i, PrettyClass(interface).c_str(), cl); 214 } 215 } 216 os << " vtable (" << NumVirtualMethods() << " entries, " 217 << (super != NULL ? super->NumVirtualMethods() : 0) << " in super):\n"; 218 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 219 os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetVirtualMethodDuringLinking(i)).c_str()); 220 } 221 os << " direct methods (" << NumDirectMethods() << " entries):\n"; 222 for (size_t i = 0; i < NumDirectMethods(); ++i) { 223 os << StringPrintf(" %2zd: %s\n", i, PrettyMethod(GetDirectMethod(i)).c_str()); 224 } 225 if (NumStaticFields() > 0) { 226 os << " static fields (" << NumStaticFields() << " entries):\n"; 227 if (IsResolved() || IsErroneous()) { 228 for (size_t i = 0; i < NumStaticFields(); ++i) { 229 os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetStaticField(i)).c_str()); 230 } 231 } else { 232 os << " <not yet available>"; 233 } 234 } 235 if (NumInstanceFields() > 0) { 236 os << " instance fields (" << NumInstanceFields() << " entries):\n"; 237 if (IsResolved() || IsErroneous()) { 238 for (size_t i = 0; i < NumInstanceFields(); ++i) { 239 os << StringPrintf(" %2zd: %s\n", i, PrettyField(GetInstanceField(i)).c_str()); 240 } 241 } else { 242 os << " <not yet available>"; 243 } 244 } 245} 246 247void Class::SetReferenceInstanceOffsets(uint32_t new_reference_offsets) { 248 if (new_reference_offsets != CLASS_WALK_SUPER) { 249 // Sanity check that the number of bits set in the reference offset bitmap 250 // agrees with the number of references 251 size_t count = 0; 252 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 253 count += c->NumReferenceInstanceFieldsDuringLinking(); 254 } 255 CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets), count); 256 } 257 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_), 258 new_reference_offsets, false); 259} 260 261void Class::SetReferenceStaticOffsets(uint32_t new_reference_offsets) { 262 if (new_reference_offsets != CLASS_WALK_SUPER) { 263 // Sanity check that the number of bits set in the reference offset bitmap 264 // agrees with the number of references 265 CHECK_EQ((size_t)__builtin_popcount(new_reference_offsets), 266 NumReferenceStaticFieldsDuringLinking()); 267 } 268 SetField32(OFFSET_OF_OBJECT_MEMBER(Class, reference_static_offsets_), 269 new_reference_offsets, false); 270} 271 272bool Class::IsInSamePackage(const StringPiece& descriptor1, const StringPiece& descriptor2) { 273 size_t i = 0; 274 while (descriptor1[i] != '\0' && descriptor1[i] == descriptor2[i]) { 275 ++i; 276 } 277 if (descriptor1.find('/', i) != StringPiece::npos || 278 descriptor2.find('/', i) != StringPiece::npos) { 279 return false; 280 } else { 281 return true; 282 } 283} 284 285bool Class::IsInSamePackage(Class* that) { 286 Class* klass1 = this; 287 Class* klass2 = that; 288 if (klass1 == klass2) { 289 return true; 290 } 291 // Class loaders must match. 292 if (klass1->GetClassLoader() != klass2->GetClassLoader()) { 293 return false; 294 } 295 // Arrays are in the same package when their element classes are. 296 while (klass1->IsArrayClass()) { 297 klass1 = klass1->GetComponentType(); 298 } 299 while (klass2->IsArrayClass()) { 300 klass2 = klass2->GetComponentType(); 301 } 302 // trivial check again for array types 303 if (klass1 == klass2) { 304 return true; 305 } 306 // Compare the package part of the descriptor string. 307 return IsInSamePackage(ClassHelper(klass1).GetDescriptor(), 308 ClassHelper(klass2).GetDescriptor()); 309} 310 311bool Class::IsClassClass() { 312 Class* java_lang_Class = GetClass()->GetClass(); 313 return this == java_lang_Class; 314} 315 316bool Class::IsStringClass() const { 317 return this == String::GetJavaLangString(); 318} 319 320bool Class::IsThrowableClass() { 321 return WellKnownClasses::ToClass(WellKnownClasses::java_lang_Throwable)->IsAssignableFrom(this); 322} 323 324bool Class::IsArtFieldClass() { 325 Class* java_lang_Class = GetClass(); 326 Class* java_lang_reflect_ArtField = java_lang_Class->GetInstanceField(0)->GetClass(); 327 return this == java_lang_reflect_ArtField; 328} 329 330bool Class::IsArtMethodClass() { 331 return this == ArtMethod::GetJavaLangReflectArtMethod(); 332} 333 334void Class::SetClassLoader(ClassLoader* new_class_loader) { 335 SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), new_class_loader, false); 336} 337 338ArtMethod* Class::FindInterfaceMethod(const StringPiece& name, const Signature& signature) { 339 // Check the current class before checking the interfaces. 340 ArtMethod* method = FindDeclaredVirtualMethod(name, signature); 341 if (method != NULL) { 342 return method; 343 } 344 345 int32_t iftable_count = GetIfTableCount(); 346 IfTable* iftable = GetIfTable(); 347 for (int32_t i = 0; i < iftable_count; i++) { 348 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(name, signature); 349 if (method != NULL) { 350 return method; 351 } 352 } 353 return NULL; 354} 355 356ArtMethod* Class::FindInterfaceMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 357 // Check the current class before checking the interfaces. 358 ArtMethod* method = FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 359 if (method != NULL) { 360 return method; 361 } 362 363 int32_t iftable_count = GetIfTableCount(); 364 IfTable* iftable = GetIfTable(); 365 for (int32_t i = 0; i < iftable_count; i++) { 366 method = iftable->GetInterface(i)->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 367 if (method != NULL) { 368 return method; 369 } 370 } 371 return NULL; 372} 373 374ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const StringPiece& signature) { 375 MethodHelper mh; 376 for (size_t i = 0; i < NumDirectMethods(); ++i) { 377 ArtMethod* method = GetDirectMethod(i); 378 mh.ChangeMethod(method); 379 if (name == mh.GetName() && mh.GetSignature() == signature) { 380 return method; 381 } 382 } 383 return NULL; 384} 385 386ArtMethod* Class::FindDeclaredDirectMethod(const StringPiece& name, const Signature& signature) { 387 MethodHelper mh; 388 for (size_t i = 0; i < NumDirectMethods(); ++i) { 389 ArtMethod* method = GetDirectMethod(i); 390 mh.ChangeMethod(method); 391 if (name == mh.GetName() && signature == mh.GetSignature()) { 392 return method; 393 } 394 } 395 return NULL; 396} 397 398ArtMethod* Class::FindDeclaredDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 399 if (GetDexCache() == dex_cache) { 400 for (size_t i = 0; i < NumDirectMethods(); ++i) { 401 ArtMethod* method = GetDirectMethod(i); 402 if (method->GetDexMethodIndex() == dex_method_idx) { 403 return method; 404 } 405 } 406 } 407 return NULL; 408} 409 410ArtMethod* Class::FindDirectMethod(const StringPiece& name, const StringPiece& signature) { 411 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 412 ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); 413 if (method != NULL) { 414 return method; 415 } 416 } 417 return NULL; 418} 419 420ArtMethod* Class::FindDirectMethod(const StringPiece& name, const Signature& signature) { 421 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 422 ArtMethod* method = klass->FindDeclaredDirectMethod(name, signature); 423 if (method != NULL) { 424 return method; 425 } 426 } 427 return NULL; 428} 429 430ArtMethod* Class::FindDirectMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 431 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 432 ArtMethod* method = klass->FindDeclaredDirectMethod(dex_cache, dex_method_idx); 433 if (method != NULL) { 434 return method; 435 } 436 } 437 return NULL; 438} 439 440ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, const StringPiece& signature) { 441 MethodHelper mh; 442 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 443 ArtMethod* method = GetVirtualMethod(i); 444 mh.ChangeMethod(method); 445 if (name == mh.GetName() && mh.GetSignature() == signature) { 446 return method; 447 } 448 } 449 return NULL; 450} 451 452ArtMethod* Class::FindDeclaredVirtualMethod(const StringPiece& name, 453 const Signature& signature) { 454 MethodHelper mh; 455 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 456 ArtMethod* method = GetVirtualMethod(i); 457 mh.ChangeMethod(method); 458 if (name == mh.GetName() && signature == mh.GetSignature()) { 459 return method; 460 } 461 } 462 return NULL; 463} 464 465ArtMethod* Class::FindDeclaredVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 466 if (GetDexCache() == dex_cache) { 467 for (size_t i = 0; i < NumVirtualMethods(); ++i) { 468 ArtMethod* method = GetVirtualMethod(i); 469 if (method->GetDexMethodIndex() == dex_method_idx) { 470 return method; 471 } 472 } 473 } 474 return NULL; 475} 476 477ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const StringPiece& signature) { 478 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 479 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 480 if (method != NULL) { 481 return method; 482 } 483 } 484 return NULL; 485} 486 487ArtMethod* Class::FindVirtualMethod(const StringPiece& name, const Signature& signature) { 488 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 489 ArtMethod* method = klass->FindDeclaredVirtualMethod(name, signature); 490 if (method != NULL) { 491 return method; 492 } 493 } 494 return NULL; 495} 496 497ArtMethod* Class::FindVirtualMethod(const DexCache* dex_cache, uint32_t dex_method_idx) { 498 for (Class* klass = this; klass != NULL; klass = klass->GetSuperClass()) { 499 ArtMethod* method = klass->FindDeclaredVirtualMethod(dex_cache, dex_method_idx); 500 if (method != NULL) { 501 return method; 502 } 503 } 504 return NULL; 505} 506 507ArtMethod* Class::FindClassInitializer() { 508 for (size_t i = 0; i < NumDirectMethods(); ++i) { 509 ArtMethod* method = GetDirectMethod(i); 510 if (method->IsConstructor() && method->IsStatic()) { 511 if (kIsDebugBuild) { 512 MethodHelper mh(method); 513 CHECK(mh.IsClassInitializer()); 514 CHECK_STREQ(mh.GetName(), "<clinit>"); 515 CHECK_STREQ(mh.GetSignature().ToString().c_str(), "()V"); 516 } 517 return method; 518 } 519 } 520 return NULL; 521} 522 523ArtField* Class::FindDeclaredInstanceField(const StringPiece& name, const StringPiece& type) { 524 // Is the field in this class? 525 // Interfaces are not relevant because they can't contain instance fields. 526 FieldHelper fh; 527 for (size_t i = 0; i < NumInstanceFields(); ++i) { 528 ArtField* f = GetInstanceField(i); 529 fh.ChangeField(f); 530 if (name == fh.GetName() && type == fh.GetTypeDescriptor()) { 531 return f; 532 } 533 } 534 return NULL; 535} 536 537ArtField* Class::FindDeclaredInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 538 if (GetDexCache() == dex_cache) { 539 for (size_t i = 0; i < NumInstanceFields(); ++i) { 540 ArtField* f = GetInstanceField(i); 541 if (f->GetDexFieldIndex() == dex_field_idx) { 542 return f; 543 } 544 } 545 } 546 return NULL; 547} 548 549ArtField* Class::FindInstanceField(const StringPiece& name, const StringPiece& type) { 550 // Is the field in this class, or any of its superclasses? 551 // Interfaces are not relevant because they can't contain instance fields. 552 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 553 ArtField* f = c->FindDeclaredInstanceField(name, type); 554 if (f != NULL) { 555 return f; 556 } 557 } 558 return NULL; 559} 560 561ArtField* Class::FindInstanceField(const DexCache* dex_cache, uint32_t dex_field_idx) { 562 // Is the field in this class, or any of its superclasses? 563 // Interfaces are not relevant because they can't contain instance fields. 564 for (Class* c = this; c != NULL; c = c->GetSuperClass()) { 565 ArtField* f = c->FindDeclaredInstanceField(dex_cache, dex_field_idx); 566 if (f != NULL) { 567 return f; 568 } 569 } 570 return NULL; 571} 572 573ArtField* Class::FindDeclaredStaticField(const StringPiece& name, const StringPiece& type) { 574 DCHECK(type != NULL); 575 FieldHelper fh; 576 for (size_t i = 0; i < NumStaticFields(); ++i) { 577 ArtField* f = GetStaticField(i); 578 fh.ChangeField(f); 579 if (name == fh.GetName() && type == fh.GetTypeDescriptor()) { 580 return f; 581 } 582 } 583 return NULL; 584} 585 586ArtField* Class::FindDeclaredStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { 587 if (dex_cache == GetDexCache()) { 588 for (size_t i = 0; i < NumStaticFields(); ++i) { 589 ArtField* f = GetStaticField(i); 590 if (f->GetDexFieldIndex() == dex_field_idx) { 591 return f; 592 } 593 } 594 } 595 return NULL; 596} 597 598ArtField* Class::FindStaticField(const StringPiece& name, const StringPiece& type) { 599 // Is the field in this class (or its interfaces), or any of its 600 // superclasses (or their interfaces)? 601 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 602 // Is the field in this class? 603 ArtField* f = k->FindDeclaredStaticField(name, type); 604 if (f != NULL) { 605 return f; 606 } 607 // Is this field in any of this class' interfaces? 608 ClassHelper kh(k); 609 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 610 Class* interface = kh.GetDirectInterface(i); 611 f = interface->FindStaticField(name, type); 612 if (f != NULL) { 613 return f; 614 } 615 } 616 } 617 return NULL; 618} 619 620ArtField* Class::FindStaticField(const DexCache* dex_cache, uint32_t dex_field_idx) { 621 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 622 // Is the field in this class? 623 ArtField* f = k->FindDeclaredStaticField(dex_cache, dex_field_idx); 624 if (f != NULL) { 625 return f; 626 } 627 // Is this field in any of this class' interfaces? 628 ClassHelper kh(k); 629 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 630 Class* interface = kh.GetDirectInterface(i); 631 f = interface->FindStaticField(dex_cache, dex_field_idx); 632 if (f != NULL) { 633 return f; 634 } 635 } 636 } 637 return NULL; 638} 639 640ArtField* Class::FindField(const StringPiece& name, const StringPiece& type) { 641 // Find a field using the JLS field resolution order 642 for (Class* k = this; k != NULL; k = k->GetSuperClass()) { 643 // Is the field in this class? 644 ArtField* f = k->FindDeclaredInstanceField(name, type); 645 if (f != NULL) { 646 return f; 647 } 648 f = k->FindDeclaredStaticField(name, type); 649 if (f != NULL) { 650 return f; 651 } 652 // Is this field in any of this class' interfaces? 653 ClassHelper kh(k); 654 for (uint32_t i = 0; i < kh.NumDirectInterfaces(); ++i) { 655 Class* interface = kh.GetDirectInterface(i); 656 f = interface->FindStaticField(name, type); 657 if (f != NULL) { 658 return f; 659 } 660 } 661 } 662 return NULL; 663} 664 665static void SetPreverifiedFlagOnMethods(mirror::ObjectArray<mirror::ArtMethod>* methods) 666 SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) { 667 if (methods != NULL) { 668 for (int32_t index = 0, end = methods->GetLength(); index < end; ++index) { 669 mirror::ArtMethod* method = methods->GetWithoutChecks(index); 670 DCHECK(method != NULL); 671 if (!method->IsNative() && !method->IsAbstract()) { 672 method->SetPreverified(); 673 } 674 } 675 } 676} 677 678void Class::SetPreverifiedFlagOnAllMethods() { 679 DCHECK(IsVerified()); 680 SetPreverifiedFlagOnMethods(GetDirectMethods()); 681 SetPreverifiedFlagOnMethods(GetVirtualMethods()); 682} 683 684} // namespace mirror 685} // namespace art 686