runtime/mirror/class-inl.h - LeafOS-Project/android_art - Gitiles

 /*
  * 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.h"
 #include "art_method.h"
 #include "class_loader.h"
 #include "common_throws.h"
 #include "dex_cache.h"
 #include "gc/heap-inl.h"
 #include "iftable.h"
 #include "object_array-inl.h"
 #include "runtime.h"
 #include "string.h"

 namespace art {
 namespace mirror {

 inline size_t Class::GetObjectSize() const {
   DCHECK(!IsVariableSize()) << " class=" << PrettyTypeOf(this);
   DCHECK_EQ(sizeof(size_t), sizeof(int32_t));
   return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, object_size_), false);
 }

 inline Class* Class::GetSuperClass() const {
   // Can only get super class for loaded classes (hack for when runtime is
   // initializing)
   DCHECK(IsLoaded() || !Runtime::Current()->IsStarted()) << IsLoaded();
   return GetFieldObject<Class*>(OFFSET_OF_OBJECT_MEMBER(Class, super_class_), false);
 }

 inline ClassLoader* Class::GetClassLoader() const {
   return GetFieldObject<ClassLoader*>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), false);
 }

 inline DexCache* Class::GetDexCache() const {
   return GetFieldObject<DexCache*>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), false);
 }

 inline ObjectArray<ArtMethod>* Class::GetDirectMethods() const {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtMethod>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false);
 }

 inline void Class::SetDirectMethods(ObjectArray<ArtMethod>* new_direct_methods)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(NULL == GetFieldObject<ObjectArray<ArtMethod>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false));
   DCHECK_NE(0, new_direct_methods->GetLength());
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_),
                  new_direct_methods, false);
 }

 inline ArtMethod* Class::GetDirectMethod(int32_t i) const
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   return GetDirectMethods()->Get(i);
 }

 inline void Class::SetDirectMethod(uint32_t i, ArtMethod* f)  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   ObjectArray<ArtMethod>* direct_methods =
       GetFieldObject<ObjectArray<ArtMethod>*>(
           OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false);
   direct_methods->Set(i, f);
 }

 // Returns the number of static, private, and constructor methods.
 inline size_t Class::NumDirectMethods() const {
   return (GetDirectMethods() != NULL) ? GetDirectMethods()->GetLength() : 0;
 }

 inline ObjectArray<ArtMethod>* Class::GetVirtualMethods() const {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtMethod>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_), false);
 }

 inline void Class::SetVirtualMethods(ObjectArray<ArtMethod>* new_virtual_methods) {
   // TODO: we reassign virtual methods to grow the table for miranda
   // methods.. they should really just be assigned once
   DCHECK_NE(0, new_virtual_methods->GetLength());
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_),
                  new_virtual_methods, false);
 }

 inline size_t Class::NumVirtualMethods() const {
   return (GetVirtualMethods() != NULL) ? GetVirtualMethods()->GetLength() : 0;
 }

 inline ArtMethod* Class::GetVirtualMethod(uint32_t i) const
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(IsResolved() || IsErroneous());
   return GetVirtualMethods()->Get(i);
 }

 inline ArtMethod* Class::GetVirtualMethodDuringLinking(uint32_t i) const
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(IsLoaded() || IsErroneous());
   return GetVirtualMethods()->Get(i);
 }

 inline void Class::SetVirtualMethod(uint32_t i, ArtMethod* f)  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   ObjectArray<ArtMethod>* virtual_methods =
       GetFieldObject<ObjectArray<ArtMethod>*>(
           OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_), false);
   virtual_methods->Set(i, f);
 }

 inline ObjectArray<ArtMethod>* Class::GetVTable() const {
   DCHECK(IsResolved() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), false);
 }

 inline ObjectArray<ArtMethod>* Class::GetVTableDuringLinking() const {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), false);
 }

 inline void Class::SetVTable(ObjectArray<ArtMethod>* new_vtable)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), new_vtable, false);
 }

 inline ObjectArray<ArtMethod>* Class::GetImTable() const {
   return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, imtable_), false);
 }

 inline void Class::SetImTable(ObjectArray<ArtMethod>* new_imtable) {
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, imtable_), new_imtable, false);
 }

 inline bool Class::Implements(const Class* klass) const {
   DCHECK(klass != NULL);
   DCHECK(klass->IsInterface()) << PrettyClass(this);
   // 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();
   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(const Class* src) const {
   DCHECK(IsArrayClass())  << PrettyClass(this);
   DCHECK(src->IsArrayClass()) << PrettyClass(src);
   return GetComponentType()->IsAssignableFrom(src->GetComponentType());
 }

 inline bool Class::IsAssignableFromArray(const Class* src) const {
   DCHECK(!IsInterface()) << PrettyClass(this);  // handled first in IsAssignableFrom
   DCHECK(src->IsArrayClass()) << PrettyClass(src);
   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.
     Class* java_lang_Object = src->GetSuperClass();
     DCHECK(java_lang_Object != NULL) << PrettyClass(src);
     DCHECK(java_lang_Object->GetSuperClass() == NULL) << PrettyClass(src);
     return this == java_lang_Object;
   }
   return IsArrayAssignableFromArray(src);
 }

 template <bool throw_on_failure, bool use_referrers_cache>
 inline bool Class::ResolvedFieldAccessTest(Class* access_to, ArtField* field,
                                            uint32_t field_idx, const 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.
     const DexCache* referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache;
     uint32_t class_idx = referrer_dex_cache->GetDexFile()->GetFieldId(field_idx).class_idx_;
     // The referenced class has already been resolved with the field, get it from the dex cache.
     Class* dex_access_to = referrer_dex_cache->GetResolvedType(class_idx);
     DCHECK(dex_access_to != nullptr);
     if (UNLIKELY(!this->CanAccess(dex_access_to))) {
       if (throw_on_failure) {
         ThrowIllegalAccessErrorClass(this, dex_access_to);
       }
       return false;
     }
     DCHECK_EQ(this->CanAccessMember(access_to, field->GetAccessFlags()),
               this->CanAccessMember(dex_access_to, field->GetAccessFlags()));
   }
   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(Class* access_to, ArtMethod* method,
                                             uint32_t method_idx, const DexCache* dex_cache) {
   COMPILE_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.
     const DexCache* referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache;
     uint32_t class_idx = referrer_dex_cache->GetDexFile()->GetMethodId(method_idx).class_idx_;
     // The referenced class has already been resolved with the method, get it from the dex cache.
     Class* dex_access_to = referrer_dex_cache->GetResolvedType(class_idx);
     DCHECK(dex_access_to != nullptr);
     if (UNLIKELY(!this->CanAccess(dex_access_to))) {
       if (throw_on_failure) {
         ThrowIllegalAccessErrorClassForMethodDispatch(this, dex_access_to,
                                                       method, throw_invoke_type);
       }
       return false;
     }
     DCHECK_EQ(this->CanAccessMember(access_to, method->GetAccessFlags()),
               this->CanAccessMember(dex_access_to, method->GetAccessFlags()));
   }
   if (LIKELY(this->CanAccessMember(access_to, method->GetAccessFlags()))) {
     return true;
   }
   if (throw_on_failure) {
     ThrowIllegalAccessErrorMethod(this, method);
   }
   return false;
 }

 inline bool Class::CanAccessResolvedField(Class* access_to, ArtField* field,
                                           const DexCache& dex_cache, uint32_t field_idx) {
   return ResolvedFieldAccessTest<false, false>(access_to, field, field_idx, &dex_cache);
 }

 inline bool Class::CheckResolvedFieldAccess(Class* access_to, ArtField* field,
                                             uint32_t field_idx) {
   return ResolvedFieldAccessTest<true, true>(access_to, field, field_idx, nullptr);
 }

 inline bool Class::CanAccessResolvedMethod(Class* access_to, ArtMethod* method,
                                            const 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(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(const Class* klass) const {
   DCHECK(!IsInterface()) << PrettyClass(this);
   DCHECK(!IsArrayClass()) << PrettyClass(this);
   const Class* current = this;
   do {
     if (current == klass) {
       return true;
     }
     current = current->GetSuperClass();
   } while (current != NULL);
   return false;
 }

 inline ArtMethod* Class::FindVirtualMethodForInterface(ArtMethod* method) const {
   Class* declaring_class = method->GetDeclaringClass();
   DCHECK(declaring_class != NULL) << PrettyClass(this);
   DCHECK(declaring_class->IsInterface()) << PrettyMethod(method);
   // TODO cache to improve lookup speed
   int32_t iftable_count = GetIfTableCount();
   IfTable* iftable = GetIfTable();
   for (int32_t i = 0; i < iftable_count; i++) {
     if (iftable->GetInterface(i) == declaring_class) {
       return iftable->GetMethodArray(i)->Get(method->GetMethodIndex());
     }
   }
   return NULL;
 }

 inline ArtMethod* Class::FindVirtualMethodForVirtual(ArtMethod* method) const
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(!method->GetDeclaringClass()->IsInterface() || method->IsMiranda());
   // The argument method may from a super class.
   // Use the index to a potentially overridden one for this instance's class.
   return GetVTable()->Get(method->GetMethodIndex());
 }

 inline ArtMethod* Class::FindVirtualMethodForSuper(ArtMethod* method) const
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(!method->GetDeclaringClass()->IsInterface());
   return GetSuperClass()->GetVTable()->Get(method->GetMethodIndex());
 }

 inline ArtMethod* Class::FindVirtualMethodForVirtualOrInterface(ArtMethod* method) const {
   if (method->IsDirect()) {
     return method;
   }
   if (method->GetDeclaringClass()->IsInterface() && !method->IsMiranda()) {
     return FindVirtualMethodForInterface(method);
   }
   return FindVirtualMethodForVirtual(method);
 }

 inline IfTable* Class::GetIfTable() const {
   return GetFieldObject<IfTable*>(OFFSET_OF_OBJECT_MEMBER(Class, iftable_), false);
 }

 inline int32_t Class::GetIfTableCount() const {
   IfTable* iftable = GetIfTable();
   if (iftable == NULL) {
     return 0;
   }
   return iftable->Count();
 }

 inline void Class::SetIfTable(IfTable* new_iftable) {
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, iftable_), new_iftable, false);
 }

 inline ObjectArray<ArtField>* Class::GetIFields() const {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false);
 }

 inline void Class::SetIFields(ObjectArray<ArtField>* new_ifields)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(NULL == GetFieldObject<ObjectArray<ArtField>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false));
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), new_ifields, false);
 }

 inline ObjectArray<ArtField>* Class::GetSFields() const {
   DCHECK(IsLoaded() || IsErroneous());
   return GetFieldObject<ObjectArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false);
 }

 inline void Class::SetSFields(ObjectArray<ArtField>* new_sfields)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK(NULL == GetFieldObject<ObjectArray<ArtField>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false));
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), new_sfields, false);
 }

 inline size_t Class::NumStaticFields() const {
   return (GetSFields() != NULL) ? GetSFields()->GetLength() : 0;
 }

 inline ArtField* Class::GetStaticField(uint32_t i) const  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   return GetSFields()->Get(i);
 }

 inline void Class::SetStaticField(uint32_t i, ArtField* f)  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   ObjectArray<ArtField>* sfields= GetFieldObject<ObjectArray<ArtField>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false);
   sfields->Set(i, f);
 }

 inline size_t Class::NumInstanceFields() const {
   return (GetIFields() != NULL) ? GetIFields()->GetLength() : 0;
 }

 inline ArtField* Class::GetInstanceField(uint32_t i) const  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   DCHECK_NE(NumInstanceFields(), 0U);
   return GetIFields()->Get(i);
 }

 inline void Class::SetInstanceField(uint32_t i, ArtField* f)  // TODO: uint16_t
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   ObjectArray<ArtField>* ifields= GetFieldObject<ObjectArray<ArtField>*>(
       OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false);
   ifields->Set(i, f);
 }

 inline void Class::SetVerifyErrorClass(Class* klass) {
   CHECK(klass != NULL) << PrettyClass(this);
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, verify_error_class_), klass, false);
 }

 inline uint32_t Class::GetAccessFlags() const {
   // Check class is loaded or this is java.lang.String that has a
   // circularity issue during loading the names of its members
   DCHECK(IsLoaded() || IsErroneous() ||
          this == String::GetJavaLangString() ||
          this == ArtField::GetJavaLangReflectArtField() ||
          this == ArtMethod::GetJavaLangReflectArtMethod());
   return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, access_flags_), false);
 }

 inline String* Class::GetName() const {
   return GetFieldObject<String*>(OFFSET_OF_OBJECT_MEMBER(Class, name_), false);
 }
 inline void Class::SetName(String* name) {
   SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, name_), name, false);
 }

 inline void Class::CheckObjectAlloc() {
   DCHECK(!IsArrayClass()) << PrettyClass(this);
   DCHECK(IsInstantiable()) << PrettyClass(this);
   // TODO: decide whether we want this check. It currently fails during bootstrap.
   // DCHECK(!Runtime::Current()->IsStarted() || IsInitializing()) << PrettyClass(this);
   DCHECK_GE(this->object_size_, sizeof(Object));
 }

 template <bool kIsInstrumented>
 inline Object* Class::Alloc(Thread* self, gc::AllocatorType allocator_type) {
   CheckObjectAlloc();
   gc::Heap* heap = Runtime::Current()->GetHeap();
   return heap->AllocObjectWithAllocator<kIsInstrumented, false>(self, this, this->object_size_,
                                                                 allocator_type);
 }

 inline Object* Class::AllocObject(Thread* self) {
   return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentAllocator());
 }

 inline Object* Class::AllocNonMovableObject(Thread* self) {
   return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentNonMovingAllocator());
 }

 }  // namespace mirror
 }  // namespace art

 #endif  // ART_RUNTIME_MIRROR_CLASS_INL_H_
	/*
	* 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.h"
	#include "art_method.h"
	#include "class_loader.h"
	#include "common_throws.h"
	#include "dex_cache.h"
	#include "gc/heap-inl.h"
	#include "iftable.h"
	#include "object_array-inl.h"
	#include "runtime.h"
	#include "string.h"

	namespace art {
	namespace mirror {

	inline size_t Class::GetObjectSize() const {
	DCHECK(!IsVariableSize()) << " class=" << PrettyTypeOf(this);
	DCHECK_EQ(sizeof(size_t), sizeof(int32_t));
	return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, object_size_), false);
	}

	inline Class* Class::GetSuperClass() const {
	// Can only get super class for loaded classes (hack for when runtime is
	// initializing)
	DCHECK(IsLoaded() \|\| !Runtime::Current()->IsStarted()) << IsLoaded();
	return GetFieldObject<Class*>(OFFSET_OF_OBJECT_MEMBER(Class, super_class_), false);
	}

	inline ClassLoader* Class::GetClassLoader() const {
	return GetFieldObject<ClassLoader*>(OFFSET_OF_OBJECT_MEMBER(Class, class_loader_), false);
	}

	inline DexCache* Class::GetDexCache() const {
	return GetFieldObject<DexCache*>(OFFSET_OF_OBJECT_MEMBER(Class, dex_cache_), false);
	}

	inline ObjectArray<ArtMethod>* Class::GetDirectMethods() const {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtMethod>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false);
	}

	inline void Class::SetDirectMethods(ObjectArray<ArtMethod>* new_direct_methods)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(NULL == GetFieldObject<ObjectArray<ArtMethod>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false));
	DCHECK_NE(0, new_direct_methods->GetLength());
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_),
	new_direct_methods, false);
	}

	inline ArtMethod* Class::GetDirectMethod(int32_t i) const
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	return GetDirectMethods()->Get(i);
	}

	inline void Class::SetDirectMethod(uint32_t i, ArtMethod* f) // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	ObjectArray<ArtMethod>* direct_methods =
	GetFieldObject<ObjectArray<ArtMethod>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, direct_methods_), false);
	direct_methods->Set(i, f);
	}

	// Returns the number of static, private, and constructor methods.
	inline size_t Class::NumDirectMethods() const {
	return (GetDirectMethods() != NULL) ? GetDirectMethods()->GetLength() : 0;
	}

	inline ObjectArray<ArtMethod>* Class::GetVirtualMethods() const {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtMethod>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_), false);
	}

	inline void Class::SetVirtualMethods(ObjectArray<ArtMethod>* new_virtual_methods) {
	// TODO: we reassign virtual methods to grow the table for miranda
	// methods.. they should really just be assigned once
	DCHECK_NE(0, new_virtual_methods->GetLength());
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_),
	new_virtual_methods, false);
	}

	inline size_t Class::NumVirtualMethods() const {
	return (GetVirtualMethods() != NULL) ? GetVirtualMethods()->GetLength() : 0;
	}

	inline ArtMethod* Class::GetVirtualMethod(uint32_t i) const
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(IsResolved() \|\| IsErroneous());
	return GetVirtualMethods()->Get(i);
	}

	inline ArtMethod* Class::GetVirtualMethodDuringLinking(uint32_t i) const
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetVirtualMethods()->Get(i);
	}

	inline void Class::SetVirtualMethod(uint32_t i, ArtMethod* f) // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	ObjectArray<ArtMethod>* virtual_methods =
	GetFieldObject<ObjectArray<ArtMethod>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, virtual_methods_), false);
	virtual_methods->Set(i, f);
	}

	inline ObjectArray<ArtMethod>* Class::GetVTable() const {
	DCHECK(IsResolved() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), false);
	}

	inline ObjectArray<ArtMethod>* Class::GetVTableDuringLinking() const {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), false);
	}

	inline void Class::SetVTable(ObjectArray<ArtMethod>* new_vtable)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, vtable_), new_vtable, false);
	}

	inline ObjectArray<ArtMethod>* Class::GetImTable() const {
	return GetFieldObject<ObjectArray<ArtMethod>*>(OFFSET_OF_OBJECT_MEMBER(Class, imtable_), false);
	}

	inline void Class::SetImTable(ObjectArray<ArtMethod>* new_imtable) {
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, imtable_), new_imtable, false);
	}

	inline bool Class::Implements(const Class* klass) const {
	DCHECK(klass != NULL);
	DCHECK(klass->IsInterface()) << PrettyClass(this);
	// 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();
	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(const Class* src) const {
	DCHECK(IsArrayClass()) << PrettyClass(this);
	DCHECK(src->IsArrayClass()) << PrettyClass(src);
	return GetComponentType()->IsAssignableFrom(src->GetComponentType());
	}

	inline bool Class::IsAssignableFromArray(const Class* src) const {
	DCHECK(!IsInterface()) << PrettyClass(this); // handled first in IsAssignableFrom
	DCHECK(src->IsArrayClass()) << PrettyClass(src);
	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.
	Class* java_lang_Object = src->GetSuperClass();
	DCHECK(java_lang_Object != NULL) << PrettyClass(src);
	DCHECK(java_lang_Object->GetSuperClass() == NULL) << PrettyClass(src);
	return this == java_lang_Object;
	}
	return IsArrayAssignableFromArray(src);
	}

	template <bool throw_on_failure, bool use_referrers_cache>
	inline bool Class::ResolvedFieldAccessTest(Class* access_to, ArtField* field,
	uint32_t field_idx, const 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.
	const DexCache* referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache;
	uint32_t class_idx = referrer_dex_cache->GetDexFile()->GetFieldId(field_idx).class_idx_;
	// The referenced class has already been resolved with the field, get it from the dex cache.
	Class* dex_access_to = referrer_dex_cache->GetResolvedType(class_idx);
	DCHECK(dex_access_to != nullptr);
	if (UNLIKELY(!this->CanAccess(dex_access_to))) {
	if (throw_on_failure) {
	ThrowIllegalAccessErrorClass(this, dex_access_to);
	}
	return false;
	}
	DCHECK_EQ(this->CanAccessMember(access_to, field->GetAccessFlags()),
	this->CanAccessMember(dex_access_to, field->GetAccessFlags()));
	}
	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(Class* access_to, ArtMethod* method,
	uint32_t method_idx, const DexCache* dex_cache) {
	COMPILE_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.
	const DexCache* referrer_dex_cache = use_referrers_cache ? this->GetDexCache() : dex_cache;
	uint32_t class_idx = referrer_dex_cache->GetDexFile()->GetMethodId(method_idx).class_idx_;
	// The referenced class has already been resolved with the method, get it from the dex cache.
	Class* dex_access_to = referrer_dex_cache->GetResolvedType(class_idx);
	DCHECK(dex_access_to != nullptr);
	if (UNLIKELY(!this->CanAccess(dex_access_to))) {
	if (throw_on_failure) {
	ThrowIllegalAccessErrorClassForMethodDispatch(this, dex_access_to,
	method, throw_invoke_type);
	}
	return false;
	}
	DCHECK_EQ(this->CanAccessMember(access_to, method->GetAccessFlags()),
	this->CanAccessMember(dex_access_to, method->GetAccessFlags()));
	}
	if (LIKELY(this->CanAccessMember(access_to, method->GetAccessFlags()))) {
	return true;
	}
	if (throw_on_failure) {
	ThrowIllegalAccessErrorMethod(this, method);
	}
	return false;
	}

	inline bool Class::CanAccessResolvedField(Class* access_to, ArtField* field,
	const DexCache& dex_cache, uint32_t field_idx) {
	return ResolvedFieldAccessTest<false, false>(access_to, field, field_idx, &dex_cache);
	}

	inline bool Class::CheckResolvedFieldAccess(Class* access_to, ArtField* field,
	uint32_t field_idx) {
	return ResolvedFieldAccessTest<true, true>(access_to, field, field_idx, nullptr);
	}

	inline bool Class::CanAccessResolvedMethod(Class* access_to, ArtMethod* method,
	const 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(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(const Class* klass) const {
	DCHECK(!IsInterface()) << PrettyClass(this);
	DCHECK(!IsArrayClass()) << PrettyClass(this);
	const Class* current = this;
	do {
	if (current == klass) {
	return true;
	}
	current = current->GetSuperClass();
	} while (current != NULL);
	return false;
	}

	inline ArtMethod* Class::FindVirtualMethodForInterface(ArtMethod* method) const {
	Class* declaring_class = method->GetDeclaringClass();
	DCHECK(declaring_class != NULL) << PrettyClass(this);
	DCHECK(declaring_class->IsInterface()) << PrettyMethod(method);
	// TODO cache to improve lookup speed
	int32_t iftable_count = GetIfTableCount();
	IfTable* iftable = GetIfTable();
	for (int32_t i = 0; i < iftable_count; i++) {
	if (iftable->GetInterface(i) == declaring_class) {
	return iftable->GetMethodArray(i)->Get(method->GetMethodIndex());
	}
	}
	return NULL;
	}

	inline ArtMethod* Class::FindVirtualMethodForVirtual(ArtMethod* method) const
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(!method->GetDeclaringClass()->IsInterface() \|\| method->IsMiranda());
	// The argument method may from a super class.
	// Use the index to a potentially overridden one for this instance's class.
	return GetVTable()->Get(method->GetMethodIndex());
	}

	inline ArtMethod* Class::FindVirtualMethodForSuper(ArtMethod* method) const
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(!method->GetDeclaringClass()->IsInterface());
	return GetSuperClass()->GetVTable()->Get(method->GetMethodIndex());
	}

	inline ArtMethod* Class::FindVirtualMethodForVirtualOrInterface(ArtMethod* method) const {
	if (method->IsDirect()) {
	return method;
	}
	if (method->GetDeclaringClass()->IsInterface() && !method->IsMiranda()) {
	return FindVirtualMethodForInterface(method);
	}
	return FindVirtualMethodForVirtual(method);
	}

	inline IfTable* Class::GetIfTable() const {
	return GetFieldObject<IfTable*>(OFFSET_OF_OBJECT_MEMBER(Class, iftable_), false);
	}

	inline int32_t Class::GetIfTableCount() const {
	IfTable* iftable = GetIfTable();
	if (iftable == NULL) {
	return 0;
	}
	return iftable->Count();
	}

	inline void Class::SetIfTable(IfTable* new_iftable) {
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, iftable_), new_iftable, false);
	}

	inline ObjectArray<ArtField>* Class::GetIFields() const {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false);
	}

	inline void Class::SetIFields(ObjectArray<ArtField>* new_ifields)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(NULL == GetFieldObject<ObjectArray<ArtField>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false));
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, ifields_), new_ifields, false);
	}

	inline ObjectArray<ArtField>* Class::GetSFields() const {
	DCHECK(IsLoaded() \|\| IsErroneous());
	return GetFieldObject<ObjectArray<ArtField>*>(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false);
	}

	inline void Class::SetSFields(ObjectArray<ArtField>* new_sfields)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK(NULL == GetFieldObject<ObjectArray<ArtField>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false));
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, sfields_), new_sfields, false);
	}

	inline size_t Class::NumStaticFields() const {
	return (GetSFields() != NULL) ? GetSFields()->GetLength() : 0;
	}

	inline ArtField* Class::GetStaticField(uint32_t i) const // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	return GetSFields()->Get(i);
	}

	inline void Class::SetStaticField(uint32_t i, ArtField* f) // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	ObjectArray<ArtField>* sfields= GetFieldObject<ObjectArray<ArtField>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, sfields_), false);
	sfields->Set(i, f);
	}

	inline size_t Class::NumInstanceFields() const {
	return (GetIFields() != NULL) ? GetIFields()->GetLength() : 0;
	}

	inline ArtField* Class::GetInstanceField(uint32_t i) const // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	DCHECK_NE(NumInstanceFields(), 0U);
	return GetIFields()->Get(i);
	}

	inline void Class::SetInstanceField(uint32_t i, ArtField* f) // TODO: uint16_t
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	ObjectArray<ArtField>* ifields= GetFieldObject<ObjectArray<ArtField>*>(
	OFFSET_OF_OBJECT_MEMBER(Class, ifields_), false);
	ifields->Set(i, f);
	}

	inline void Class::SetVerifyErrorClass(Class* klass) {
	CHECK(klass != NULL) << PrettyClass(this);
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, verify_error_class_), klass, false);
	}

	inline uint32_t Class::GetAccessFlags() const {
	// Check class is loaded or this is java.lang.String that has a
	// circularity issue during loading the names of its members
	DCHECK(IsLoaded() \|\| IsErroneous() \|\|
	this == String::GetJavaLangString() \|\|
	this == ArtField::GetJavaLangReflectArtField() \|\|
	this == ArtMethod::GetJavaLangReflectArtMethod());
	return GetField32(OFFSET_OF_OBJECT_MEMBER(Class, access_flags_), false);
	}

	inline String* Class::GetName() const {
	return GetFieldObject<String*>(OFFSET_OF_OBJECT_MEMBER(Class, name_), false);
	}
	inline void Class::SetName(String* name) {
	SetFieldObject(OFFSET_OF_OBJECT_MEMBER(Class, name_), name, false);
	}

	inline void Class::CheckObjectAlloc() {
	DCHECK(!IsArrayClass()) << PrettyClass(this);
	DCHECK(IsInstantiable()) << PrettyClass(this);
	// TODO: decide whether we want this check. It currently fails during bootstrap.
	// DCHECK(!Runtime::Current()->IsStarted() \|\| IsInitializing()) << PrettyClass(this);
	DCHECK_GE(this->object_size_, sizeof(Object));
	}

	template <bool kIsInstrumented>
	inline Object* Class::Alloc(Thread* self, gc::AllocatorType allocator_type) {
	CheckObjectAlloc();
	gc::Heap* heap = Runtime::Current()->GetHeap();
	return heap->AllocObjectWithAllocator<kIsInstrumented, false>(self, this, this->object_size_,
	allocator_type);
	}

	inline Object* Class::AllocObject(Thread* self) {
	return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentAllocator());
	}

	inline Object* Class::AllocNonMovableObject(Thread* self) {
	return Alloc<true>(self, Runtime::Current()->GetHeap()->GetCurrentNonMovingAllocator());
	}

	} // namespace mirror
	} // namespace art

	#endif // ART_RUNTIME_MIRROR_CLASS_INL_H_