| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_RUNTIME_MIRROR_CLASS_INL_H_ |
| #define ART_RUNTIME_MIRROR_CLASS_INL_H_ |
| |
| #include "class.h" |
| |
| #include "art_field-inl.h" |
| #include "art_method.h" |
| #include "art_method-inl.h" |
| #include "base/array_slice.h" |
| #include "base/length_prefixed_array.h" |
| #include "class_loader.h" |
| #include "common_throws.h" |
| #include "dex_file.h" |
| #include "gc/heap-inl.h" |
| #include "iftable.h" |
| #include "object_array-inl.h" |
| #include "read_barrier-inl.h" |
| #include "reference-inl.h" |
| #include "runtime.h" |
| #include "string.h" |
| #include "utils.h" |
| |
| namespace art { |
| namespace mirror { |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline uint32_t Class::GetObjectSize() { |
| // Note: Extra parentheses to avoid the comma being interpreted as macro parameter separator. |
| DCHECK((!IsVariableSize<kVerifyFlags, kReadBarrierOption>())) << "class=" << PrettyTypeOf(); |
| return GetField32(ObjectSizeOffset()); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline uint32_t Class::GetObjectSizeAllocFastPath() { |
| // Note: Extra parentheses to avoid the comma being interpreted as macro parameter separator. |
| DCHECK((!IsVariableSize<kVerifyFlags, kReadBarrierOption>())) << "class=" << PrettyTypeOf(); |
| return GetField32(ObjectSizeAllocFastPathOffset()); |
| } |
| |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline Class* Class::GetSuperClass() { |
| // Can only get super class for loaded classes (hack for when runtime is |
| // initializing) |
| DCHECK(IsLoaded<kVerifyFlags>() || |
| IsErroneous<kVerifyFlags>() || |
| !Runtime::Current()->IsStarted()) << IsLoaded(); |
| return GetFieldObject<Class, kVerifyFlags, kReadBarrierOption>( |
| OFFSET_OF_OBJECT_MEMBER(Class, super_class_)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline ClassLoader* Class::GetClassLoader() { |
| return GetFieldObject<ClassLoader, kVerifyFlags, kReadBarrierOption>( |
| OFFSET_OF_OBJECT_MEMBER(Class, class_loader_)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline DexCache* Class::GetDexCache() { |
| return GetFieldObject<DexCache, kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_)); |
| } |
| |
| inline uint32_t Class::GetCopiedMethodsStartOffset() { |
| return GetFieldShort(OFFSET_OF_OBJECT_MEMBER(Class, copied_methods_offset_)); |
| } |
| |
| inline uint32_t Class::GetDirectMethodsStartOffset() { |
| return 0; |
| } |
| |
| inline uint32_t Class::GetVirtualMethodsStartOffset() { |
| return GetFieldShort(OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_offset_)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetDirectMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetDirectMethodsSliceUnchecked(pointer_size); |
| } |
| |
| inline ArraySlice<ArtMethod> Class::GetDirectMethodsSliceUnchecked(PointerSize pointer_size) { |
| return ArraySlice<ArtMethod>(GetMethodsPtr(), |
| GetDirectMethodsStartOffset(), |
| GetVirtualMethodsStartOffset(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetDeclaredMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetDeclaredMethodsSliceUnchecked(pointer_size); |
| } |
| |
| inline ArraySlice<ArtMethod> Class::GetDeclaredMethodsSliceUnchecked(PointerSize pointer_size) { |
| return ArraySlice<ArtMethod>(GetMethodsPtr(), |
| GetDirectMethodsStartOffset(), |
| GetCopiedMethodsStartOffset(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetDeclaredVirtualMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetDeclaredVirtualMethodsSliceUnchecked(pointer_size); |
| } |
| |
| inline ArraySlice<ArtMethod> Class::GetDeclaredVirtualMethodsSliceUnchecked( |
| PointerSize pointer_size) { |
| return ArraySlice<ArtMethod>(GetMethodsPtr(), |
| GetVirtualMethodsStartOffset(), |
| GetCopiedMethodsStartOffset(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetVirtualMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetVirtualMethodsSliceUnchecked(pointer_size); |
| } |
| |
| inline ArraySlice<ArtMethod> Class::GetVirtualMethodsSliceUnchecked(PointerSize pointer_size) { |
| LengthPrefixedArray<ArtMethod>* methods = GetMethodsPtr(); |
| return ArraySlice<ArtMethod>(methods, |
| GetVirtualMethodsStartOffset(), |
| NumMethods(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetCopiedMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetCopiedMethodsSliceUnchecked(pointer_size); |
| } |
| |
| inline ArraySlice<ArtMethod> Class::GetCopiedMethodsSliceUnchecked(PointerSize pointer_size) { |
| LengthPrefixedArray<ArtMethod>* methods = GetMethodsPtr(); |
| return ArraySlice<ArtMethod>(methods, |
| GetCopiedMethodsStartOffset(), |
| NumMethods(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| inline LengthPrefixedArray<ArtMethod>* Class::GetMethodsPtr() { |
| return reinterpret_cast<LengthPrefixedArray<ArtMethod>*>( |
| static_cast<uintptr_t>(GetField64(OFFSET_OF_OBJECT_MEMBER(Class, methods_)))); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArraySlice<ArtMethod> Class::GetMethodsSlice(PointerSize pointer_size) { |
| DCHECK(IsLoaded() || IsErroneous()); |
| LengthPrefixedArray<ArtMethod>* methods = GetMethodsPtr(); |
| return ArraySlice<ArtMethod>(methods, |
| 0, |
| NumMethods(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| |
| inline uint32_t Class::NumMethods() { |
| LengthPrefixedArray<ArtMethod>* methods = GetMethodsPtr(); |
| return (methods == nullptr) ? 0 : methods->size(); |
| } |
| |
| inline ArtMethod* Class::GetDirectMethodUnchecked(size_t i, PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return &GetDirectMethodsSliceUnchecked(pointer_size).At(i); |
| } |
| |
| inline ArtMethod* Class::GetDirectMethod(size_t i, PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return &GetDirectMethodsSlice(pointer_size).At(i); |
| } |
| |
| inline void Class::SetMethodsPtr(LengthPrefixedArray<ArtMethod>* new_methods, |
| uint32_t num_direct, |
| uint32_t num_virtual) { |
| DCHECK(GetMethodsPtr() == nullptr); |
| SetMethodsPtrUnchecked(new_methods, num_direct, num_virtual); |
| } |
| |
| |
| inline void Class::SetMethodsPtrUnchecked(LengthPrefixedArray<ArtMethod>* new_methods, |
| uint32_t num_direct, |
| uint32_t num_virtual) { |
| DCHECK_LE(num_direct + num_virtual, (new_methods == nullptr) ? 0 : new_methods->size()); |
| SetMethodsPtrInternal(new_methods); |
| SetFieldShort<false>(OFFSET_OF_OBJECT_MEMBER(Class, copied_methods_offset_), |
| dchecked_integral_cast<uint16_t>(num_direct + num_virtual)); |
| SetFieldShort<false>(OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_offset_), |
| dchecked_integral_cast<uint16_t>(num_direct)); |
| } |
| |
| inline void Class::SetMethodsPtrInternal(LengthPrefixedArray<ArtMethod>* new_methods) { |
| SetField64<false>(OFFSET_OF_OBJECT_MEMBER(Class, methods_), |
| static_cast<uint64_t>(reinterpret_cast<uintptr_t>(new_methods))); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline ArtMethod* Class::GetVirtualMethod(size_t i, PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| DCHECK(IsResolved<kVerifyFlags>() || IsErroneous<kVerifyFlags>()) |
| << Class::PrettyClass() << " status=" << GetStatus(); |
| return GetVirtualMethodUnchecked(i, pointer_size); |
| } |
| |
| inline ArtMethod* Class::GetVirtualMethodDuringLinking(size_t i, PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetVirtualMethodUnchecked(i, pointer_size); |
| } |
| |
| inline ArtMethod* Class::GetVirtualMethodUnchecked(size_t i, PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return &GetVirtualMethodsSliceUnchecked(pointer_size).At(i); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, |
| ReadBarrierOption kReadBarrierOption> |
| inline PointerArray* Class::GetVTable() { |
| DCHECK(IsLoaded<kVerifyFlags>() || IsErroneous<kVerifyFlags>()); |
| return GetFieldObject<PointerArray, kVerifyFlags, kReadBarrierOption>( |
| OFFSET_OF_OBJECT_MEMBER(Class, vtable_)); |
| } |
| |
| inline PointerArray* Class::GetVTableDuringLinking() { |
| DCHECK(IsLoaded() || IsErroneous()); |
| return GetFieldObject<PointerArray>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_)); |
| } |
| |
| inline void Class::SetVTable(PointerArray* new_vtable) { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), new_vtable); |
| } |
| |
| inline bool Class::HasVTable() { |
| return GetVTable() != nullptr || ShouldHaveEmbeddedVTable(); |
| } |
| |
| inline int32_t Class::GetVTableLength() { |
| if (ShouldHaveEmbeddedVTable()) { |
| return GetEmbeddedVTableLength(); |
| } |
| return GetVTable() != nullptr ? GetVTable()->GetLength() : 0; |
| } |
| |
| inline ArtMethod* Class::GetVTableEntry(uint32_t i, PointerSize pointer_size) { |
| if (ShouldHaveEmbeddedVTable()) { |
| return GetEmbeddedVTableEntry(i, pointer_size); |
| } |
| auto* vtable = GetVTable(); |
| DCHECK(vtable != nullptr); |
| return vtable->GetElementPtrSize<ArtMethod*>(i, pointer_size); |
| } |
| |
| inline int32_t Class::GetEmbeddedVTableLength() { |
| return GetField32(MemberOffset(EmbeddedVTableLengthOffset())); |
| } |
| |
| inline void Class::SetEmbeddedVTableLength(int32_t len) { |
| SetField32<false>(MemberOffset(EmbeddedVTableLengthOffset()), len); |
| } |
| |
| inline ImTable* Class::GetImt(PointerSize pointer_size) { |
| return GetFieldPtrWithSize<ImTable*>(MemberOffset(ImtPtrOffset(pointer_size)), pointer_size); |
| } |
| |
| inline void Class::SetImt(ImTable* imt, PointerSize pointer_size) { |
| return SetFieldPtrWithSize<false>(MemberOffset(ImtPtrOffset(pointer_size)), imt, pointer_size); |
| } |
| |
| inline MemberOffset Class::EmbeddedVTableEntryOffset(uint32_t i, PointerSize pointer_size) { |
| return MemberOffset( |
| EmbeddedVTableOffset(pointer_size).Uint32Value() + i * VTableEntrySize(pointer_size)); |
| } |
| |
| inline ArtMethod* Class::GetEmbeddedVTableEntry(uint32_t i, PointerSize pointer_size) { |
| return GetFieldPtrWithSize<ArtMethod*>(EmbeddedVTableEntryOffset(i, pointer_size), pointer_size); |
| } |
| |
| inline void Class::SetEmbeddedVTableEntryUnchecked( |
| uint32_t i, ArtMethod* method, PointerSize pointer_size) { |
| SetFieldPtrWithSize<false>(EmbeddedVTableEntryOffset(i, pointer_size), method, pointer_size); |
| } |
| |
| inline void Class::SetEmbeddedVTableEntry(uint32_t i, ArtMethod* method, PointerSize pointer_size) { |
| auto* vtable = GetVTableDuringLinking(); |
| CHECK_EQ(method, vtable->GetElementPtrSize<ArtMethod*>(i, pointer_size)); |
| SetEmbeddedVTableEntryUnchecked(i, method, pointer_size); |
| } |
| |
| inline bool Class::Implements(ObjPtr<Class> klass) { |
| DCHECK(klass != nullptr); |
| DCHECK(klass->IsInterface()) << PrettyClass(); |
| // All interfaces implemented directly and by our superclass, and |
| // recursively all super-interfaces of those interfaces, are listed |
| // in iftable_, so we can just do a linear scan through that. |
| int32_t iftable_count = GetIfTableCount(); |
| ObjPtr<IfTable> iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; i++) { |
| if (iftable->GetInterface(i) == klass) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| // Determine whether "this" is assignable from "src", where both of these |
| // are array classes. |
| // |
| // Consider an array class, e.g. Y[][], where Y is a subclass of X. |
| // Y[][] = Y[][] --> true (identity) |
| // X[][] = Y[][] --> true (element superclass) |
| // Y = Y[][] --> false |
| // Y[] = Y[][] --> false |
| // Object = Y[][] --> true (everything is an object) |
| // Object[] = Y[][] --> true |
| // Object[][] = Y[][] --> true |
| // Object[][][] = Y[][] --> false (too many []s) |
| // Serializable = Y[][] --> true (all arrays are Serializable) |
| // Serializable[] = Y[][] --> true |
| // Serializable[][] = Y[][] --> false (unless Y is Serializable) |
| // |
| // Don't forget about primitive types. |
| // Object[] = int[] --> false |
| // |
| inline bool Class::IsArrayAssignableFromArray(ObjPtr<Class> src) { |
| DCHECK(IsArrayClass()) << PrettyClass(); |
| DCHECK(src->IsArrayClass()) << src->PrettyClass(); |
| return GetComponentType()->IsAssignableFrom(src->GetComponentType()); |
| } |
| |
| inline bool Class::IsAssignableFromArray(ObjPtr<Class> src) { |
| DCHECK(!IsInterface()) << PrettyClass(); // handled first in IsAssignableFrom |
| DCHECK(src->IsArrayClass()) << src->PrettyClass(); |
| if (!IsArrayClass()) { |
| // If "this" is not also an array, it must be Object. |
| // src's super should be java_lang_Object, since it is an array. |
| ObjPtr<Class> java_lang_Object = src->GetSuperClass(); |
| DCHECK(java_lang_Object != nullptr) << src->PrettyClass(); |
| DCHECK(java_lang_Object->GetSuperClass() == nullptr) << src->PrettyClass(); |
| return this == java_lang_Object; |
| } |
| return IsArrayAssignableFromArray(src); |
| } |
| |
| template <bool throw_on_failure, bool use_referrers_cache> |
| inline bool Class::ResolvedFieldAccessTest(ObjPtr<Class> access_to, |
| ArtField* field, |
| uint32_t field_idx, |
| ObjPtr<DexCache> dex_cache) { |
| DCHECK_EQ(use_referrers_cache, dex_cache == nullptr); |
| if (UNLIKELY(!this->CanAccess(access_to))) { |
| // The referrer class can't access the field's declaring class but may still be able |
| // to access the field if the FieldId specifies an accessible subclass of the declaring |
| // class rather than the declaring class itself. |
| ObjPtr<DexCache> referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache; |
| dex::TypeIndex class_idx = referrer_dex_cache->GetDexFile()->GetFieldId(field_idx).class_idx_; |
| // The referenced class has already been resolved with the field, but may not be in the dex |
| // cache. Use LookupResolveType here to search the class table if it is not in the dex cache. |
| // should be no thread suspension due to the class being resolved. |
| ObjPtr<Class> dex_access_to = Runtime::Current()->GetClassLinker()->LookupResolvedType( |
| *referrer_dex_cache->GetDexFile(), |
| class_idx, |
| referrer_dex_cache, |
| access_to->GetClassLoader()); |
| DCHECK(dex_access_to != nullptr); |
| if (UNLIKELY(!this->CanAccess(dex_access_to))) { |
| if (throw_on_failure) { |
| ThrowIllegalAccessErrorClass(this, dex_access_to); |
| } |
| return false; |
| } |
| } |
| if (LIKELY(this->CanAccessMember(access_to, field->GetAccessFlags()))) { |
| return true; |
| } |
| if (throw_on_failure) { |
| ThrowIllegalAccessErrorField(this, field); |
| } |
| return false; |
| } |
| |
| template <bool throw_on_failure, bool use_referrers_cache, InvokeType throw_invoke_type> |
| inline bool Class::ResolvedMethodAccessTest(ObjPtr<Class> access_to, |
| ArtMethod* method, |
| uint32_t method_idx, |
| ObjPtr<DexCache> dex_cache) { |
| static_assert(throw_on_failure || throw_invoke_type == kStatic, "Non-default throw invoke type"); |
| DCHECK_EQ(use_referrers_cache, dex_cache == nullptr); |
| if (UNLIKELY(!this->CanAccess(access_to))) { |
| // The referrer class can't access the method's declaring class but may still be able |
| // to access the method if the MethodId specifies an accessible subclass of the declaring |
| // class rather than the declaring class itself. |
| ObjPtr<DexCache> referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache; |
| dex::TypeIndex class_idx = referrer_dex_cache->GetDexFile()->GetMethodId(method_idx).class_idx_; |
| // The referenced class has already been resolved with the method, but may not be in the dex |
| // cache. |
| ObjPtr<Class> dex_access_to = Runtime::Current()->GetClassLinker()->LookupResolvedType( |
| *referrer_dex_cache->GetDexFile(), |
| class_idx, |
| referrer_dex_cache, |
| access_to->GetClassLoader()); |
| DCHECK(dex_access_to != nullptr); |
| if (UNLIKELY(!this->CanAccess(dex_access_to))) { |
| if (throw_on_failure) { |
| ThrowIllegalAccessErrorClassForMethodDispatch(this, |
| dex_access_to.Ptr(), |
| method, |
| throw_invoke_type); |
| } |
| return false; |
| } |
| } |
| if (LIKELY(this->CanAccessMember(access_to, method->GetAccessFlags()))) { |
| return true; |
| } |
| if (throw_on_failure) { |
| ThrowIllegalAccessErrorMethod(this, method); |
| } |
| return false; |
| } |
| |
| inline bool Class::CanAccessResolvedField(ObjPtr<Class> access_to, |
| ArtField* field, |
| ObjPtr<DexCache> dex_cache, |
| uint32_t field_idx) { |
| return ResolvedFieldAccessTest<false, false>(access_to, field, field_idx, dex_cache); |
| } |
| |
| inline bool Class::CheckResolvedFieldAccess(ObjPtr<Class> access_to, |
| ArtField* field, |
| uint32_t field_idx) { |
| return ResolvedFieldAccessTest<true, true>(access_to, field, field_idx, nullptr); |
| } |
| |
| inline bool Class::CanAccessResolvedMethod(ObjPtr<Class> access_to, |
| ArtMethod* method, |
| ObjPtr<DexCache> dex_cache, |
| uint32_t method_idx) { |
| return ResolvedMethodAccessTest<false, false, kStatic>(access_to, method, method_idx, dex_cache); |
| } |
| |
| template <InvokeType throw_invoke_type> |
| inline bool Class::CheckResolvedMethodAccess(ObjPtr<Class> access_to, |
| ArtMethod* method, |
| uint32_t method_idx) { |
| return ResolvedMethodAccessTest<true, true, throw_invoke_type>(access_to, |
| method, |
| method_idx, |
| nullptr); |
| } |
| |
| inline bool Class::IsSubClass(ObjPtr<Class> klass) { |
| DCHECK(!IsInterface()) << PrettyClass(); |
| DCHECK(!IsArrayClass()) << PrettyClass(); |
| ObjPtr<Class> current = this; |
| do { |
| if (current == klass) { |
| return true; |
| } |
| current = current->GetSuperClass(); |
| } while (current != nullptr); |
| return false; |
| } |
| |
| inline ArtMethod* Class::FindVirtualMethodForInterface(ArtMethod* method, |
| PointerSize pointer_size) { |
| ObjPtr<Class> declaring_class = method->GetDeclaringClass(); |
| DCHECK(declaring_class != nullptr) << PrettyClass(); |
| DCHECK(declaring_class->IsInterface()) << method->PrettyMethod(); |
| DCHECK(!method->IsCopied()); |
| // TODO cache to improve lookup speed |
| const int32_t iftable_count = GetIfTableCount(); |
| ObjPtr<IfTable> iftable = GetIfTable(); |
| for (int32_t i = 0; i < iftable_count; i++) { |
| if (iftable->GetInterface(i) == declaring_class) { |
| return iftable->GetMethodArray(i)->GetElementPtrSize<ArtMethod*>( |
| method->GetMethodIndex(), pointer_size); |
| } |
| } |
| return nullptr; |
| } |
| |
| inline ArtMethod* Class::FindVirtualMethodForVirtual(ArtMethod* method, PointerSize pointer_size) { |
| // Only miranda or default methods may come from interfaces and be used as a virtual. |
| DCHECK(!method->GetDeclaringClass()->IsInterface() || method->IsDefault() || method->IsMiranda()); |
| // The argument method may from a super class. |
| // Use the index to a potentially overridden one for this instance's class. |
| return GetVTableEntry(method->GetMethodIndex(), pointer_size); |
| } |
| |
| inline ArtMethod* Class::FindVirtualMethodForSuper(ArtMethod* method, PointerSize pointer_size) { |
| DCHECK(!method->GetDeclaringClass()->IsInterface()); |
| return GetSuperClass()->GetVTableEntry(method->GetMethodIndex(), pointer_size); |
| } |
| |
| inline ArtMethod* Class::FindVirtualMethodForVirtualOrInterface(ArtMethod* method, |
| PointerSize pointer_size) { |
| if (method->IsDirect()) { |
| return method; |
| } |
| if (method->GetDeclaringClass()->IsInterface() && !method->IsCopied()) { |
| return FindVirtualMethodForInterface(method, pointer_size); |
| } |
| return FindVirtualMethodForVirtual(method, pointer_size); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, |
| ReadBarrierOption kReadBarrierOption> |
| inline IfTable* Class::GetIfTable() { |
| ObjPtr<IfTable> ret = GetFieldObject<IfTable, kVerifyFlags, kReadBarrierOption>(IfTableOffset()); |
| DCHECK(ret != nullptr) << PrettyClass(this); |
| return ret.Ptr(); |
| } |
| |
| inline int32_t Class::GetIfTableCount() { |
| return GetIfTable()->Count(); |
| } |
| |
| inline void Class::SetIfTable(ObjPtr<IfTable> new_iftable) { |
| DCHECK(new_iftable != nullptr) << PrettyClass(this); |
| SetFieldObject<false>(IfTableOffset(), new_iftable); |
| } |
| |
| inline LengthPrefixedArray<ArtField>* Class::GetIFieldsPtr() { |
| DCHECK(IsLoaded() || IsErroneous()) << GetStatus(); |
| return GetFieldPtr<LengthPrefixedArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_)); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline MemberOffset Class::GetFirstReferenceInstanceFieldOffset() { |
| ObjPtr<Class> super_class = GetSuperClass<kVerifyFlags, kReadBarrierOption>(); |
| return (super_class != nullptr) |
| ? MemberOffset(RoundUp(super_class->GetObjectSize<kVerifyFlags, kReadBarrierOption>(), |
| kHeapReferenceSize)) |
| : ClassOffset(); |
| } |
| |
| template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline MemberOffset Class::GetFirstReferenceStaticFieldOffset(PointerSize pointer_size) { |
| DCHECK(IsResolved()); |
| uint32_t base = sizeof(Class); // Static fields come after the class. |
| if (ShouldHaveEmbeddedVTable<kVerifyFlags, kReadBarrierOption>()) { |
| // Static fields come after the embedded tables. |
| base = Class::ComputeClassSize( |
| true, GetEmbeddedVTableLength(), 0, 0, 0, 0, 0, pointer_size); |
| } |
| return MemberOffset(base); |
| } |
| |
| inline MemberOffset Class::GetFirstReferenceStaticFieldOffsetDuringLinking( |
| PointerSize pointer_size) { |
| DCHECK(IsLoaded()); |
| uint32_t base = sizeof(Class); // Static fields come after the class. |
| if (ShouldHaveEmbeddedVTable()) { |
| // Static fields come after the embedded tables. |
| base = Class::ComputeClassSize(true, GetVTableDuringLinking()->GetLength(), |
| 0, 0, 0, 0, 0, pointer_size); |
| } |
| return MemberOffset(base); |
| } |
| |
| inline void Class::SetIFieldsPtr(LengthPrefixedArray<ArtField>* new_ifields) { |
| DCHECK(GetIFieldsPtrUnchecked() == nullptr); |
| return SetFieldPtr<false>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), new_ifields); |
| } |
| |
| inline void Class::SetIFieldsPtrUnchecked(LengthPrefixedArray<ArtField>* new_ifields) { |
| SetFieldPtr<false, true, kVerifyNone>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), new_ifields); |
| } |
| |
| inline LengthPrefixedArray<ArtField>* Class::GetSFieldsPtrUnchecked() { |
| return GetFieldPtr<LengthPrefixedArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_)); |
| } |
| |
| inline LengthPrefixedArray<ArtField>* Class::GetIFieldsPtrUnchecked() { |
| return GetFieldPtr<LengthPrefixedArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_)); |
| } |
| |
| inline LengthPrefixedArray<ArtField>* Class::GetSFieldsPtr() { |
| DCHECK(IsLoaded() || IsErroneous()) << GetStatus(); |
| return GetSFieldsPtrUnchecked(); |
| } |
| |
| inline void Class::SetSFieldsPtr(LengthPrefixedArray<ArtField>* new_sfields) { |
| DCHECK((IsRetired() && new_sfields == nullptr) || |
| GetFieldPtr<ArtField*>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_)) == nullptr); |
| SetFieldPtr<false>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), new_sfields); |
| } |
| |
| inline void Class::SetSFieldsPtrUnchecked(LengthPrefixedArray<ArtField>* new_sfields) { |
| SetFieldPtr<false, true, kVerifyNone>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), new_sfields); |
| } |
| |
| inline ArtField* Class::GetStaticField(uint32_t i) { |
| return &GetSFieldsPtr()->At(i); |
| } |
| |
| inline ArtField* Class::GetInstanceField(uint32_t i) { |
| return &GetIFieldsPtr()->At(i); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline uint32_t Class::GetReferenceInstanceOffsets() { |
| DCHECK(IsResolved<kVerifyFlags>() || IsErroneous<kVerifyFlags>()); |
| return GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Class, reference_instance_offsets_)); |
| } |
| |
| inline void Class::SetClinitThreadId(pid_t new_clinit_thread_id) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetField32<true>(OFFSET_OF_OBJECT_MEMBER(Class, clinit_thread_id_), new_clinit_thread_id); |
| } else { |
| SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, clinit_thread_id_), new_clinit_thread_id); |
| } |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline uint32_t Class::GetAccessFlags() { |
| // Check class is loaded/retired or this is java.lang.String that has a |
| // circularity issue during loading the names of its members |
| DCHECK(IsIdxLoaded<kVerifyFlags>() || IsRetired<kVerifyFlags>() || |
| IsErroneous<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>() || |
| this == String::GetJavaLangString()) |
| << "IsIdxLoaded=" << IsIdxLoaded<kVerifyFlags>() |
| << " IsRetired=" << IsRetired<kVerifyFlags>() |
| << " IsErroneous=" << |
| IsErroneous<static_cast<VerifyObjectFlags>(kVerifyFlags & ~kVerifyThis)>() |
| << " IsString=" << (this == String::GetJavaLangString()) |
| << " status= " << GetStatus<kVerifyFlags>() |
| << " descriptor=" << PrettyDescriptor(); |
| return GetField32<kVerifyFlags>(AccessFlagsOffset()); |
| } |
| |
| inline String* Class::GetName() { |
| return GetFieldObject<String>(OFFSET_OF_OBJECT_MEMBER(Class, name_)); |
| } |
| |
| inline void Class::SetName(ObjPtr<String> name) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetFieldObject<true>(OFFSET_OF_OBJECT_MEMBER(Class, name_), name); |
| } else { |
| SetFieldObject<false>(OFFSET_OF_OBJECT_MEMBER(Class, name_), name); |
| } |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline Primitive::Type Class::GetPrimitiveType() { |
| static_assert(sizeof(Primitive::Type) == sizeof(int32_t), |
| "art::Primitive::Type and int32_t have different sizes."); |
| int32_t v32 = GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Class, primitive_type_)); |
| Primitive::Type type = static_cast<Primitive::Type>(v32 & kPrimitiveTypeMask); |
| DCHECK_EQ(static_cast<size_t>(v32 >> kPrimitiveTypeSizeShiftShift), |
| Primitive::ComponentSizeShift(type)); |
| return type; |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags> |
| inline size_t Class::GetPrimitiveTypeSizeShift() { |
| static_assert(sizeof(Primitive::Type) == sizeof(int32_t), |
| "art::Primitive::Type and int32_t have different sizes."); |
| int32_t v32 = GetField32<kVerifyFlags>(OFFSET_OF_OBJECT_MEMBER(Class, primitive_type_)); |
| size_t size_shift = static_cast<Primitive::Type>(v32 >> kPrimitiveTypeSizeShiftShift); |
| DCHECK_EQ(size_shift, |
| Primitive::ComponentSizeShift(static_cast<Primitive::Type>(v32 & kPrimitiveTypeMask))); |
| return size_shift; |
| } |
| |
| inline void Class::CheckObjectAlloc() { |
| DCHECK(!IsArrayClass()) |
| << PrettyClass() |
| << "A array shouldn't be allocated through this " |
| << "as it requires a pre-fence visitor that sets the class size."; |
| DCHECK(!IsClassClass()) |
| << PrettyClass() |
| << "A class object shouldn't be allocated through this " |
| << "as it requires a pre-fence visitor that sets the class size."; |
| DCHECK(!IsStringClass()) |
| << PrettyClass() |
| << "A string shouldn't be allocated through this " |
| << "as it requires a pre-fence visitor that sets the class size."; |
| DCHECK(IsInstantiable()) << PrettyClass(); |
| // TODO: decide whether we want this check. It currently fails during bootstrap. |
| // DCHECK(!Runtime::Current()->IsStarted() || IsInitializing()) << PrettyClass(); |
| DCHECK_GE(this->object_size_, sizeof(Object)); |
| } |
| |
| template<bool kIsInstrumented, bool kCheckAddFinalizer> |
| inline ObjPtr<Object> Class::Alloc(Thread* self, gc::AllocatorType allocator_type) { |
| CheckObjectAlloc(); |
| gc::Heap* heap = Runtime::Current()->GetHeap(); |
| const bool add_finalizer = kCheckAddFinalizer && IsFinalizable(); |
| if (!kCheckAddFinalizer) { |
| DCHECK(!IsFinalizable()); |
| } |
| // Note that the this pointer may be invalidated after the allocation. |
| ObjPtr<Object> obj = |
| heap->AllocObjectWithAllocator<kIsInstrumented, false>(self, |
| this, |
| this->object_size_, |
| allocator_type, |
| VoidFunctor()); |
| if (add_finalizer && LIKELY(obj != nullptr)) { |
| heap->AddFinalizerReference(self, &obj); |
| if (UNLIKELY(self->IsExceptionPending())) { |
| // Failed to allocate finalizer reference, it means that the whole allocation failed. |
| obj = nullptr; |
| } |
| } |
| return obj.Ptr(); |
| } |
| |
| inline ObjPtr<Object> Class::AllocObject(Thread* self) { |
| return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentAllocator()); |
| } |
| |
| inline ObjPtr<Object> Class::AllocNonMovableObject(Thread* self) { |
| return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentNonMovingAllocator()); |
| } |
| |
| inline uint32_t Class::ComputeClassSize(bool has_embedded_vtable, |
| uint32_t num_vtable_entries, |
| uint32_t num_8bit_static_fields, |
| uint32_t num_16bit_static_fields, |
| uint32_t num_32bit_static_fields, |
| uint32_t num_64bit_static_fields, |
| uint32_t num_ref_static_fields, |
| PointerSize pointer_size) { |
| // Space used by java.lang.Class and its instance fields. |
| uint32_t size = sizeof(Class); |
| // Space used by embedded tables. |
| if (has_embedded_vtable) { |
| size = RoundUp(size + sizeof(uint32_t), static_cast<size_t>(pointer_size)); |
| size += static_cast<size_t>(pointer_size); // size of pointer to IMT |
| size += num_vtable_entries * VTableEntrySize(pointer_size); |
| } |
| |
| // Space used by reference statics. |
| size += num_ref_static_fields * kHeapReferenceSize; |
| if (!IsAligned<8>(size) && num_64bit_static_fields > 0) { |
| uint32_t gap = 8 - (size & 0x7); |
| size += gap; // will be padded |
| // Shuffle 4-byte fields forward. |
| while (gap >= sizeof(uint32_t) && num_32bit_static_fields != 0) { |
| --num_32bit_static_fields; |
| gap -= sizeof(uint32_t); |
| } |
| // Shuffle 2-byte fields forward. |
| while (gap >= sizeof(uint16_t) && num_16bit_static_fields != 0) { |
| --num_16bit_static_fields; |
| gap -= sizeof(uint16_t); |
| } |
| // Shuffle byte fields forward. |
| while (gap >= sizeof(uint8_t) && num_8bit_static_fields != 0) { |
| --num_8bit_static_fields; |
| gap -= sizeof(uint8_t); |
| } |
| } |
| // Guaranteed to be at least 4 byte aligned. No need for further alignments. |
| // Space used for primitive static fields. |
| size += num_8bit_static_fields * sizeof(uint8_t) + num_16bit_static_fields * sizeof(uint16_t) + |
| num_32bit_static_fields * sizeof(uint32_t) + num_64bit_static_fields * sizeof(uint64_t); |
| return size; |
| } |
| |
| template <bool kVisitNativeRoots, |
| VerifyObjectFlags kVerifyFlags, |
| ReadBarrierOption kReadBarrierOption, |
| typename Visitor> |
| inline void Class::VisitReferences(ObjPtr<Class> klass, const Visitor& visitor) { |
| VisitInstanceFieldsReferences<kVerifyFlags, kReadBarrierOption>(klass.Ptr(), visitor); |
| // Right after a class is allocated, but not yet loaded |
| // (kStatusNotReady, see ClassLinker::LoadClass()), GC may find it |
| // and scan it. IsTemp() may call Class::GetAccessFlags() but may |
| // fail in the DCHECK in Class::GetAccessFlags() because the class |
| // status is kStatusNotReady. To avoid it, rely on IsResolved() |
| // only. This is fine because a temp class never goes into the |
| // kStatusResolved state. |
| if (IsResolved<kVerifyFlags>()) { |
| // Temp classes don't ever populate imt/vtable or static fields and they are not even |
| // allocated with the right size for those. Also, unresolved classes don't have fields |
| // linked yet. |
| VisitStaticFieldsReferences<kVerifyFlags, kReadBarrierOption>(this, visitor); |
| } |
| if (kVisitNativeRoots) { |
| // Since this class is reachable, we must also visit the associated roots when we scan it. |
| VisitNativeRoots<kReadBarrierOption>( |
| visitor, Runtime::Current()->GetClassLinker()->GetImagePointerSize()); |
| } |
| } |
| |
| template<ReadBarrierOption kReadBarrierOption> |
| inline bool Class::IsReferenceClass() const { |
| return this == Reference::GetJavaLangRefReference<kReadBarrierOption>(); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline bool Class::IsClassClass() { |
| ObjPtr<Class> java_lang_Class = GetClass<kVerifyFlags, kReadBarrierOption>()-> |
| template GetClass<kVerifyFlags, kReadBarrierOption>(); |
| return this == java_lang_Class; |
| } |
| |
| inline const DexFile& Class::GetDexFile() { |
| return *GetDexCache()->GetDexFile(); |
| } |
| |
| inline bool Class::DescriptorEquals(const char* match) { |
| if (IsArrayClass()) { |
| return match[0] == '[' && GetComponentType()->DescriptorEquals(match + 1); |
| } else if (IsPrimitive()) { |
| return strcmp(Primitive::Descriptor(GetPrimitiveType()), match) == 0; |
| } else if (IsProxyClass()) { |
| return ProxyDescriptorEquals(match); |
| } else { |
| const DexFile& dex_file = GetDexFile(); |
| const DexFile::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_); |
| return strcmp(dex_file.GetTypeDescriptor(type_id), match) == 0; |
| } |
| } |
| |
| inline void Class::AssertInitializedOrInitializingInThread(Thread* self) { |
| if (kIsDebugBuild && !IsInitialized()) { |
| CHECK(IsInitializing()) << PrettyClass() << " is not initializing: " << GetStatus(); |
| CHECK_EQ(GetClinitThreadId(), self->GetTid()) << PrettyClass() |
| << " is initializing in a different thread"; |
| } |
| } |
| |
| inline ObjectArray<Class>* Class::GetInterfaces() { |
| CHECK(IsProxyClass()); |
| // First static field. |
| auto* field = GetStaticField(0); |
| DCHECK_STREQ(field->GetName(), "interfaces"); |
| MemberOffset field_offset = field->GetOffset(); |
| return GetFieldObject<ObjectArray<Class>>(field_offset); |
| } |
| |
| inline ObjectArray<ObjectArray<Class>>* Class::GetThrows() { |
| CHECK(IsProxyClass()); |
| // Second static field. |
| auto* field = GetStaticField(1); |
| DCHECK_STREQ(field->GetName(), "throws"); |
| MemberOffset field_offset = field->GetOffset(); |
| return GetFieldObject<ObjectArray<ObjectArray<Class>>>(field_offset); |
| } |
| |
| inline MemberOffset Class::GetDisableIntrinsicFlagOffset() { |
| CHECK(IsReferenceClass()); |
| // First static field |
| auto* field = GetStaticField(0); |
| DCHECK_STREQ(field->GetName(), "disableIntrinsic"); |
| return field->GetOffset(); |
| } |
| |
| inline MemberOffset Class::GetSlowPathFlagOffset() { |
| CHECK(IsReferenceClass()); |
| // Second static field |
| auto* field = GetStaticField(1); |
| DCHECK_STREQ(field->GetName(), "slowPathEnabled"); |
| return field->GetOffset(); |
| } |
| |
| inline bool Class::GetSlowPathEnabled() { |
| return GetFieldBoolean(GetSlowPathFlagOffset()); |
| } |
| |
| inline void Class::SetSlowPath(bool enabled) { |
| SetFieldBoolean<false, false>(GetSlowPathFlagOffset(), enabled); |
| } |
| |
| inline void Class::InitializeClassVisitor::operator()(ObjPtr<Object> obj, |
| size_t usable_size) const { |
| DCHECK_LE(class_size_, usable_size); |
| // Avoid AsClass as object is not yet in live bitmap or allocation stack. |
| ObjPtr<Class> klass = ObjPtr<Class>::DownCast(obj); |
| klass->SetClassSize(class_size_); |
| klass->SetPrimitiveType(Primitive::kPrimNot); // Default to not being primitive. |
| klass->SetDexClassDefIndex(DexFile::kDexNoIndex16); // Default to no valid class def index. |
| klass->SetDexTypeIndex(dex::TypeIndex(DexFile::kDexNoIndex16)); // Default to no valid type |
| // index. |
| // Default to force slow path until initialized. |
| klass->SetObjectSizeAllocFastPath(std::numeric_limits<uint32_t>::max()); |
| } |
| |
| inline void Class::SetAccessFlags(uint32_t new_access_flags) { |
| // Called inside a transaction when setting pre-verified flag during boot image compilation. |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetField32<true>(AccessFlagsOffset(), new_access_flags); |
| } else { |
| SetField32<false>(AccessFlagsOffset(), new_access_flags); |
| } |
| } |
| |
| inline void Class::SetClassFlags(uint32_t new_flags) { |
| if (Runtime::Current()->IsActiveTransaction()) { |
| SetField32<true>(OFFSET_OF_OBJECT_MEMBER(Class, class_flags_), new_flags); |
| } else { |
| SetField32<false>(OFFSET_OF_OBJECT_MEMBER(Class, class_flags_), new_flags); |
| } |
| } |
| |
| inline uint32_t Class::NumDirectInterfaces() { |
| if (IsPrimitive()) { |
| return 0; |
| } else if (IsArrayClass()) { |
| return 2; |
| } else if (IsProxyClass()) { |
| ObjectArray<Class>* interfaces = GetInterfaces(); |
| return interfaces != nullptr ? interfaces->GetLength() : 0; |
| } else { |
| const DexFile::TypeList* interfaces = GetInterfaceTypeList(); |
| if (interfaces == nullptr) { |
| return 0; |
| } else { |
| return interfaces->Size(); |
| } |
| } |
| } |
| |
| template<ReadBarrierOption kReadBarrierOption, class Visitor> |
| void Class::VisitNativeRoots(Visitor& visitor, PointerSize pointer_size) { |
| for (ArtField& field : GetSFieldsUnchecked()) { |
| // Visit roots first in case the declaring class gets moved. |
| field.VisitRoots(visitor); |
| if (kIsDebugBuild && IsResolved()) { |
| CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus(); |
| } |
| } |
| for (ArtField& field : GetIFieldsUnchecked()) { |
| // Visit roots first in case the declaring class gets moved. |
| field.VisitRoots(visitor); |
| if (kIsDebugBuild && IsResolved()) { |
| CHECK_EQ(field.GetDeclaringClass<kReadBarrierOption>(), this) << GetStatus(); |
| } |
| } |
| for (ArtMethod& method : GetMethods(pointer_size)) { |
| method.VisitRoots<kReadBarrierOption>(visitor, pointer_size); |
| } |
| } |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetDirectMethods(PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return GetDirectMethodsSliceUnchecked(pointer_size).AsRange(); |
| } |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetDeclaredMethods( |
| PointerSize pointer_size) { |
| return GetDeclaredMethodsSliceUnchecked(pointer_size).AsRange(); |
| } |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetDeclaredVirtualMethods( |
| PointerSize pointer_size) { |
| return GetDeclaredVirtualMethodsSliceUnchecked(pointer_size).AsRange(); |
| } |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetVirtualMethods( |
| PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return GetVirtualMethodsSliceUnchecked(pointer_size).AsRange(); |
| } |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetCopiedMethods(PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return GetCopiedMethodsSliceUnchecked(pointer_size).AsRange(); |
| } |
| |
| |
| inline IterationRange<StrideIterator<ArtMethod>> Class::GetMethods(PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return MakeIterationRangeFromLengthPrefixedArray(GetMethodsPtr(), |
| ArtMethod::Size(pointer_size), |
| ArtMethod::Alignment(pointer_size)); |
| } |
| |
| inline IterationRange<StrideIterator<ArtField>> Class::GetIFields() { |
| return MakeIterationRangeFromLengthPrefixedArray(GetIFieldsPtr()); |
| } |
| |
| inline IterationRange<StrideIterator<ArtField>> Class::GetSFields() { |
| return MakeIterationRangeFromLengthPrefixedArray(GetSFieldsPtr()); |
| } |
| |
| inline IterationRange<StrideIterator<ArtField>> Class::GetIFieldsUnchecked() { |
| return MakeIterationRangeFromLengthPrefixedArray(GetIFieldsPtrUnchecked()); |
| } |
| |
| inline IterationRange<StrideIterator<ArtField>> Class::GetSFieldsUnchecked() { |
| return MakeIterationRangeFromLengthPrefixedArray(GetSFieldsPtrUnchecked()); |
| } |
| |
| inline MemberOffset Class::EmbeddedVTableOffset(PointerSize pointer_size) { |
| CheckPointerSize(pointer_size); |
| return MemberOffset(ImtPtrOffset(pointer_size).Uint32Value() + static_cast<size_t>(pointer_size)); |
| } |
| |
| inline void Class::CheckPointerSize(PointerSize pointer_size) { |
| DCHECK_EQ(pointer_size, Runtime::Current()->GetClassLinker()->GetImagePointerSize()); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline Class* Class::GetComponentType() { |
| return GetFieldObject<Class, kVerifyFlags, kReadBarrierOption>(ComponentTypeOffset()); |
| } |
| |
| template<VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption> |
| inline bool Class::IsArrayClass() { |
| return GetComponentType<kVerifyFlags, kReadBarrierOption>() != nullptr; |
| } |
| |
| inline bool Class::IsAssignableFrom(ObjPtr<Class> src) { |
| DCHECK(src != nullptr); |
| if (this == src) { |
| // Can always assign to things of the same type. |
| return true; |
| } else if (IsObjectClass()) { |
| // Can assign any reference to java.lang.Object. |
| return !src->IsPrimitive(); |
| } else if (IsInterface()) { |
| return src->Implements(this); |
| } else if (src->IsArrayClass()) { |
| return IsAssignableFromArray(src); |
| } else { |
| return !src->IsInterface() && src->IsSubClass(this); |
| } |
| } |
| |
| inline uint32_t Class::NumDirectMethods() { |
| return GetVirtualMethodsStartOffset(); |
| } |
| |
| inline uint32_t Class::NumDeclaredVirtualMethods() { |
| return GetCopiedMethodsStartOffset() - GetVirtualMethodsStartOffset(); |
| } |
| |
| inline uint32_t Class::NumVirtualMethods() { |
| return NumMethods() - GetVirtualMethodsStartOffset(); |
| } |
| |
| inline uint32_t Class::NumInstanceFields() { |
| LengthPrefixedArray<ArtField>* arr = GetIFieldsPtrUnchecked(); |
| return arr != nullptr ? arr->size() : 0u; |
| } |
| |
| inline uint32_t Class::NumStaticFields() { |
| LengthPrefixedArray<ArtField>* arr = GetSFieldsPtrUnchecked(); |
| return arr != nullptr ? arr->size() : 0u; |
| } |
| |
| template <VerifyObjectFlags kVerifyFlags, ReadBarrierOption kReadBarrierOption, typename Visitor> |
| inline void Class::FixupNativePointers(Class* dest, |
| PointerSize pointer_size, |
| const Visitor& visitor) { |
| // Update the field arrays. |
| LengthPrefixedArray<ArtField>* const sfields = GetSFieldsPtr(); |
| LengthPrefixedArray<ArtField>* const new_sfields = visitor(sfields); |
| if (sfields != new_sfields) { |
| dest->SetSFieldsPtrUnchecked(new_sfields); |
| } |
| LengthPrefixedArray<ArtField>* const ifields = GetIFieldsPtr(); |
| LengthPrefixedArray<ArtField>* const new_ifields = visitor(ifields); |
| if (ifields != new_ifields) { |
| dest->SetIFieldsPtrUnchecked(new_ifields); |
| } |
| // Update method array. |
| LengthPrefixedArray<ArtMethod>* methods = GetMethodsPtr(); |
| LengthPrefixedArray<ArtMethod>* new_methods = visitor(methods); |
| if (methods != new_methods) { |
| dest->SetMethodsPtrInternal(new_methods); |
| } |
| // Fix up embedded tables. |
| if (!IsTemp() && ShouldHaveEmbeddedVTable<kVerifyNone, kReadBarrierOption>()) { |
| for (int32_t i = 0, count = GetEmbeddedVTableLength(); i < count; ++i) { |
| ArtMethod* method = GetEmbeddedVTableEntry(i, pointer_size); |
| ArtMethod* new_method = visitor(method); |
| if (method != new_method) { |
| dest->SetEmbeddedVTableEntryUnchecked(i, new_method, pointer_size); |
| } |
| } |
| } |
| if (!IsTemp() && ShouldHaveImt<kVerifyNone, kReadBarrierOption>()) { |
| dest->SetImt(visitor(GetImt(pointer_size)), pointer_size); |
| } |
| } |
| |
| inline bool Class::CanAccess(ObjPtr<Class> that) { |
| return that->IsPublic() || this->IsInSamePackage(that); |
| } |
| |
| |
| inline bool Class::CanAccessMember(ObjPtr<Class> access_to, uint32_t member_flags) { |
| // Classes can access all of their own members |
| if (this == access_to) { |
| return true; |
| } |
| // Public members are trivially accessible |
| if (member_flags & kAccPublic) { |
| return true; |
| } |
| // Private members are trivially not accessible |
| if (member_flags & kAccPrivate) { |
| return false; |
| } |
| // Check for protected access from a sub-class, which may or may not be in the same package. |
| if (member_flags & kAccProtected) { |
| if (!this->IsInterface() && this->IsSubClass(access_to)) { |
| return true; |
| } |
| } |
| // Allow protected access from other classes in the same package. |
| return this->IsInSamePackage(access_to); |
| } |
| |
| inline bool Class::CannotBeAssignedFromOtherTypes() { |
| if (!IsArrayClass()) { |
| return IsFinal(); |
| } |
| ObjPtr<Class> component = GetComponentType(); |
| return component->IsPrimitive() || component->CannotBeAssignedFromOtherTypes(); |
| } |
| |
| } // namespace mirror |
| } // namespace art |
| |
| #endif // ART_RUNTIME_MIRROR_CLASS_INL_H_ |