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 "art_field.h" 18 19 #include "art_field-inl.h" 20 #include "class_linker-inl.h" 21 #include "gc/accounting/card_table-inl.h" 22 #include "handle_scope.h" 23 #include "mirror/class-inl.h" 24 #include "mirror/object-inl.h" 25 #include "mirror/object_array-inl.h" 26 #include "runtime.h" 27 #include "scoped_thread_state_change.h" 28 #include "utils.h" 29 #include "well_known_classes.h" 30 31 namespace art { 32 33 ArtField::ArtField() : access_flags_(0), field_dex_idx_(0), offset_(0) { 34 declaring_class_ = GcRoot<mirror::Class>(nullptr); 35 } 36 37 void ArtField::SetOffset(MemberOffset num_bytes) { 38 DCHECK(GetDeclaringClass()->IsLoaded() || GetDeclaringClass()->IsErroneous()); 39 if (kIsDebugBuild && Runtime::Current()->IsAotCompiler() && 40 Runtime::Current()->IsCompilingBootImage()) { 41 Primitive::Type type = GetTypeAsPrimitiveType(); 42 if (type == Primitive::kPrimDouble || type == Primitive::kPrimLong) { 43 DCHECK_ALIGNED(num_bytes.Uint32Value(), 8); 44 } 45 } 46 // Not called within a transaction. 47 offset_ = num_bytes.Uint32Value(); 48 } 49 50 ArtField* ArtField::FindInstanceFieldWithOffset(mirror::Class* klass, uint32_t field_offset) { 51 DCHECK(klass != nullptr); 52 auto* instance_fields = klass->GetIFields(); 53 for (size_t i = 0, count = klass->NumInstanceFields(); i < count; ++i) { 54 if (instance_fields[i].GetOffset().Uint32Value() == field_offset) { 55 return &instance_fields[i]; 56 } 57 } 58 // We did not find field in the class: look into superclass. 59 return (klass->GetSuperClass() != nullptr) ? 60 FindInstanceFieldWithOffset(klass->GetSuperClass(), field_offset) : nullptr; 61 } 62 63 ArtField* ArtField::FindStaticFieldWithOffset(mirror::Class* klass, uint32_t field_offset) { 64 DCHECK(klass != nullptr); 65 auto* static_fields = klass->GetSFields(); 66 for (size_t i = 0, count = klass->NumStaticFields(); i < count; ++i) { 67 if (static_fields[i].GetOffset().Uint32Value() == field_offset) { 68 return &static_fields[i]; 69 } 70 } 71 return nullptr; 72 } 73 74 mirror::Class* ArtField::ProxyFindSystemClass(const char* descriptor) { 75 DCHECK(GetDeclaringClass()->IsProxyClass()); 76 return Runtime::Current()->GetClassLinker()->FindSystemClass(Thread::Current(), descriptor); 77 } 78 79 mirror::Class* ArtField::ResolveGetType(uint32_t type_idx) { 80 return Runtime::Current()->GetClassLinker()->ResolveType(type_idx, this); 81 } 82 83 mirror::String* ArtField::ResolveGetStringName(Thread* self, const DexFile& dex_file, 84 uint32_t string_idx, mirror::DexCache* dex_cache) { 85 StackHandleScope<1> hs(self); 86 return Runtime::Current()->GetClassLinker()->ResolveString( 87 dex_file, string_idx, hs.NewHandle(dex_cache)); 88 } 89 90 } // namespace art 91
