runtime/art_method-inl.h - platform/art - Git at Google

 /*
  * 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_ART_METHOD_INL_H_
 #define ART_RUNTIME_ART_METHOD_INL_H_

 #include "art_method.h"

 #include "art_field.h"
 #include "base/logging.h"
 #include "class_linker-inl.h"
 #include "common_throws.h"
 #include "dex_file.h"
 #include "dex_file_annotations.h"
 #include "dex_file-inl.h"
 #include "gc_root-inl.h"
 #include "jit/profiling_info.h"
 #include "mirror/class-inl.h"
 #include "mirror/dex_cache-inl.h"
 #include "mirror/object-inl.h"
 #include "mirror/object_array.h"
 #include "mirror/string.h"
 #include "oat.h"
 #include "obj_ptr-inl.h"
 #include "quick/quick_method_frame_info.h"
 #include "read_barrier-inl.h"
 #include "runtime-inl.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread-inl.h"
 #include "utils.h"

 namespace art {

 template <ReadBarrierOption kReadBarrierOption>
 inline mirror::Class* ArtMethod::GetDeclaringClassUnchecked() {
   GcRootSource gc_root_source(this);
   return declaring_class_.Read<kReadBarrierOption>(&gc_root_source);
 }

 template <ReadBarrierOption kReadBarrierOption>
 inline mirror::Class* ArtMethod::GetDeclaringClass() {
   mirror::Class* result = GetDeclaringClassUnchecked<kReadBarrierOption>();
   if (kIsDebugBuild) {
     if (!IsRuntimeMethod()) {
       CHECK(result != nullptr) << this;
       if (kCheckDeclaringClassState) {
         if (!(result->IsIdxLoaded() || result->IsErroneous())) {
           LOG(FATAL_WITHOUT_ABORT) << "Class status: " << result->GetStatus();
           LOG(FATAL) << result->PrettyClass();
         }
       }
     } else {
       CHECK(result == nullptr) << this;
     }
   }
   return result;
 }

 inline void ArtMethod::SetDeclaringClass(ObjPtr<mirror::Class> new_declaring_class) {
   declaring_class_ = GcRoot<mirror::Class>(new_declaring_class);
 }

 inline bool ArtMethod::CASDeclaringClass(mirror::Class* expected_class,
                                          mirror::Class* desired_class) {
   GcRoot<mirror::Class> expected_root(expected_class);
   GcRoot<mirror::Class> desired_root(desired_class);
   return reinterpret_cast<Atomic<GcRoot<mirror::Class>>*>(&declaring_class_)->
       CompareExchangeStrongSequentiallyConsistent(
           expected_root, desired_root);
 }

 inline uint16_t ArtMethod::GetMethodIndex() {
   DCHECK(IsRuntimeMethod() || GetDeclaringClass()->IsResolved());
   return method_index_;
 }

 inline uint16_t ArtMethod::GetMethodIndexDuringLinking() {
   return method_index_;
 }

 inline uint32_t ArtMethod::GetDexMethodIndex() {
   if (kCheckDeclaringClassState) {
     CHECK(IsRuntimeMethod() || GetDeclaringClass()->IsIdxLoaded() ||
           GetDeclaringClass()->IsErroneous());
   }
   return GetDexMethodIndexUnchecked();
 }

 inline ArtMethod** ArtMethod::GetDexCacheResolvedMethods(PointerSize pointer_size) {
   return GetNativePointer<ArtMethod**>(DexCacheResolvedMethodsOffset(pointer_size),
                                        pointer_size);
 }

 inline ArtMethod* ArtMethod::GetDexCacheResolvedMethod(uint16_t method_index,
                                                        PointerSize pointer_size) {
   // NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
   // without accessing the DexCache and we don't want to do that in release build.
   DCHECK_LT(method_index,
             GetInterfaceMethodIfProxy(pointer_size)->GetDexCache()->NumResolvedMethods());
   ArtMethod* method = mirror::DexCache::GetElementPtrSize(GetDexCacheResolvedMethods(pointer_size),
                                                           method_index,
                                                           pointer_size);
   if (LIKELY(method != nullptr)) {
     auto* declaring_class = method->GetDeclaringClass();
     if (LIKELY(declaring_class == nullptr || !declaring_class->IsErroneous())) {
       return method;
     }
   }
   return nullptr;
 }

 inline void ArtMethod::SetDexCacheResolvedMethod(uint16_t method_index,
                                                  ArtMethod* new_method,
                                                  PointerSize pointer_size) {
   // NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
   // without accessing the DexCache and we don't want to do that in release build.
   DCHECK_LT(method_index,
             GetInterfaceMethodIfProxy(pointer_size)->GetDexCache()->NumResolvedMethods());
   DCHECK(new_method == nullptr || new_method->GetDeclaringClass() != nullptr);
   mirror::DexCache::SetElementPtrSize(GetDexCacheResolvedMethods(pointer_size),
                                       method_index,
                                       new_method,
                                       pointer_size);
 }

 inline bool ArtMethod::HasDexCacheResolvedMethods(PointerSize pointer_size) {
   return GetDexCacheResolvedMethods(pointer_size) != nullptr;
 }

 inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod** other_cache,
                                                       PointerSize pointer_size) {
   return GetDexCacheResolvedMethods(pointer_size) == other_cache;
 }

 inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod* other, PointerSize pointer_size) {
   return GetDexCacheResolvedMethods(pointer_size) ==
       other->GetDexCacheResolvedMethods(pointer_size);
 }

 inline mirror::Class* ArtMethod::GetClassFromTypeIndex(dex::TypeIndex type_idx, bool resolve) {
   // TODO: Refactor this function into two functions, Resolve...() and Lookup...()
   // so that we can properly annotate it with no-suspension possible / suspension possible.
   ObjPtr<mirror::DexCache> dex_cache = GetDexCache();
   ObjPtr<mirror::Class> type = dex_cache->GetResolvedType(type_idx);
   if (UNLIKELY(type == nullptr)) {
     ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
     if (resolve) {
       type = class_linker->ResolveType(type_idx, this);
       CHECK(type != nullptr || Thread::Current()->IsExceptionPending());
     } else {
       type = class_linker->LookupResolvedType(
           *dex_cache->GetDexFile(), type_idx, dex_cache, GetClassLoader());
     }
   }
   return type.Ptr();
 }

 inline bool ArtMethod::CheckIncompatibleClassChange(InvokeType type) {
   switch (type) {
     case kStatic:
       return !IsStatic();
     case kDirect:
       return !IsDirect() || IsStatic();
     case kVirtual: {
       // We have an error if we are direct or a non-copied (i.e. not part of a real class) interface
       // method.
       mirror::Class* methods_class = GetDeclaringClass();
       return IsDirect() || (methods_class->IsInterface() && !IsCopied());
     }
     case kSuper:
       // Constructors and static methods are called with invoke-direct.
       return IsConstructor() || IsStatic();
     case kInterface: {
       mirror::Class* methods_class = GetDeclaringClass();
       return IsDirect() || !(methods_class->IsInterface() || methods_class->IsObjectClass());
     }
     default:
       LOG(FATAL) << "Unreachable - invocation type: " << type;
       UNREACHABLE();
   }
 }

 inline bool ArtMethod::IsCalleeSaveMethod() {
   if (!IsRuntimeMethod()) {
     return false;
   }
   Runtime* runtime = Runtime::Current();
   bool result = false;
   for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
     if (this == runtime->GetCalleeSaveMethod(Runtime::CalleeSaveType(i))) {
       result = true;
       break;
     }
   }
   return result;
 }

 inline bool ArtMethod::IsResolutionMethod() {
   bool result = this == Runtime::Current()->GetResolutionMethod();
   // Check that if we do think it is phony it looks like the resolution method.
   DCHECK(!result || IsRuntimeMethod());
   return result;
 }

 inline bool ArtMethod::IsImtUnimplementedMethod() {
   bool result = this == Runtime::Current()->GetImtUnimplementedMethod();
   // Check that if we do think it is phony it looks like the imt unimplemented method.
   DCHECK(!result || IsRuntimeMethod());
   return result;
 }

 inline const DexFile* ArtMethod::GetDexFile() {
   // It is safe to avoid the read barrier here since the dex file is constant, so if we read the
   // from-space dex file pointer it will be equal to the to-space copy.
   return GetDexCache<kWithoutReadBarrier>()->GetDexFile();
 }

 inline const char* ArtMethod::GetDeclaringClassDescriptor() {
   uint32_t dex_method_idx = GetDexMethodIndex();
   if (UNLIKELY(dex_method_idx == DexFile::kDexNoIndex)) {
     return "<runtime method>";
   }
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetMethodDeclaringClassDescriptor(dex_file->GetMethodId(dex_method_idx));
 }

 inline const char* ArtMethod::GetShorty() {
   uint32_t unused_length;
   return GetShorty(&unused_length);
 }

 inline const char* ArtMethod::GetShorty(uint32_t* out_length) {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetMethodShorty(dex_file->GetMethodId(GetDexMethodIndex()), out_length);
 }

 inline const Signature ArtMethod::GetSignature() {
   uint32_t dex_method_idx = GetDexMethodIndex();
   if (dex_method_idx != DexFile::kDexNoIndex) {
     DCHECK(!IsProxyMethod());
     const DexFile* dex_file = GetDexFile();
     return dex_file->GetMethodSignature(dex_file->GetMethodId(dex_method_idx));
   }
   return Signature::NoSignature();
 }

 inline const char* ArtMethod::GetName() {
   uint32_t dex_method_idx = GetDexMethodIndex();
   if (LIKELY(dex_method_idx != DexFile::kDexNoIndex)) {
     DCHECK(!IsProxyMethod());
     const DexFile* dex_file = GetDexFile();
     return dex_file->GetMethodName(dex_file->GetMethodId(dex_method_idx));
   }
   Runtime* const runtime = Runtime::Current();
   if (this == runtime->GetResolutionMethod()) {
     return "<runtime internal resolution method>";
   } else if (this == runtime->GetImtConflictMethod()) {
     return "<runtime internal imt conflict method>";
   } else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveAllCalleeSaves)) {
     return "<runtime internal callee-save all registers method>";
   } else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveRefsOnly)) {
     return "<runtime internal callee-save reference registers method>";
   } else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveRefsAndArgs)) {
     return "<runtime internal callee-save reference and argument registers method>";
   } else {
     return "<unknown runtime internal method>";
   }
 }

 inline const DexFile::CodeItem* ArtMethod::GetCodeItem() {
   return GetDexFile()->GetCodeItem(GetCodeItemOffset());
 }

 inline bool ArtMethod::IsResolvedTypeIdx(dex::TypeIndex type_idx) {
   DCHECK(!IsProxyMethod());
   return GetClassFromTypeIndex(type_idx, /* resolve */ false) != nullptr;
 }

 inline int32_t ArtMethod::GetLineNumFromDexPC(uint32_t dex_pc) {
   DCHECK(!IsProxyMethod());
   if (dex_pc == DexFile::kDexNoIndex) {
     return IsNative() ? -2 : -1;
   }
   return annotations::GetLineNumFromPC(GetDexFile(), this, dex_pc);
 }

 inline const DexFile::ProtoId& ArtMethod::GetPrototype() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetMethodPrototype(dex_file->GetMethodId(GetDexMethodIndex()));
 }

 inline const DexFile::TypeList* ArtMethod::GetParameterTypeList() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   const DexFile::ProtoId& proto = dex_file->GetMethodPrototype(
       dex_file->GetMethodId(GetDexMethodIndex()));
   return dex_file->GetProtoParameters(proto);
 }

 inline const char* ArtMethod::GetDeclaringClassSourceFile() {
   DCHECK(!IsProxyMethod());
   return GetDeclaringClass()->GetSourceFile();
 }

 inline uint16_t ArtMethod::GetClassDefIndex() {
   DCHECK(!IsProxyMethod());
   if (LIKELY(!IsObsolete())) {
     return GetDeclaringClass()->GetDexClassDefIndex();
   } else {
     return FindObsoleteDexClassDefIndex();
   }
 }

 inline const DexFile::ClassDef& ArtMethod::GetClassDef() {
   DCHECK(!IsProxyMethod());
   return GetDexFile()->GetClassDef(GetClassDefIndex());
 }

 inline const char* ArtMethod::GetReturnTypeDescriptor() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
   const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
   return dex_file->GetTypeDescriptor(dex_file->GetTypeId(proto_id.return_type_idx_));
 }

 inline const char* ArtMethod::GetTypeDescriptorFromTypeIdx(dex::TypeIndex type_idx) {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetTypeDescriptor(dex_file->GetTypeId(type_idx));
 }

 inline mirror::ClassLoader* ArtMethod::GetClassLoader() {
   DCHECK(!IsProxyMethod());
   return GetDeclaringClass()->GetClassLoader();
 }

 template <ReadBarrierOption kReadBarrierOption>
 inline mirror::DexCache* ArtMethod::GetDexCache() {
   if (LIKELY(!IsObsolete())) {
     mirror::Class* klass = GetDeclaringClass<kReadBarrierOption>();
     return klass->GetDexCache<kDefaultVerifyFlags, kReadBarrierOption>();
   } else {
     DCHECK(!IsProxyMethod());
     return GetObsoleteDexCache();
   }
 }

 inline bool ArtMethod::IsProxyMethod() {
   // Avoid read barrier since the from-space version of the class will have the correct proxy class
   // flags since they are constant for the lifetime of the class.
   return GetDeclaringClass<kWithoutReadBarrier>()->IsProxyClass();
 }

 inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(PointerSize pointer_size) {
   if (LIKELY(!IsProxyMethod())) {
     return this;
   }
   ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
       GetDexCacheResolvedMethods(pointer_size),
       GetDexMethodIndex(),
       pointer_size);
   DCHECK(interface_method != nullptr);
   DCHECK_EQ(interface_method,
             Runtime::Current()->GetClassLinker()->FindMethodForProxy(GetDeclaringClass(), this));
   return interface_method;
 }

 inline void ArtMethod::SetDexCacheResolvedMethods(ArtMethod** new_dex_cache_methods,
                                                   PointerSize pointer_size) {
   SetNativePointer(DexCacheResolvedMethodsOffset(pointer_size),
                    new_dex_cache_methods,
                    pointer_size);
 }

 inline mirror::Class* ArtMethod::GetReturnType(bool resolve) {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
   const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
   dex::TypeIndex return_type_idx = proto_id.return_type_idx_;
   return GetClassFromTypeIndex(return_type_idx, resolve);
 }

 inline bool ArtMethod::HasSingleImplementation() {
   if (IsFinal() || GetDeclaringClass()->IsFinal()) {
     // We don't set kAccSingleImplementation for these cases since intrinsic
     // can use the flag also.
     return true;
   }
   return (GetAccessFlags() & kAccSingleImplementation) != 0;
 }

 inline void ArtMethod::SetIntrinsic(uint32_t intrinsic) {
   DCHECK(IsUint<8>(intrinsic));
   // Currently we only do intrinsics for static/final methods or methods of final
   // classes. We don't set kHasSingleImplementation for those methods.
   DCHECK(IsStatic() || IsFinal() || GetDeclaringClass()->IsFinal()) <<
       "Potential conflict with kAccSingleImplementation";
   uint32_t new_value = (GetAccessFlags() & kAccFlagsNotUsedByIntrinsic) |
       kAccIntrinsic |
       (intrinsic << POPCOUNT(kAccFlagsNotUsedByIntrinsic));
   if (kIsDebugBuild) {
     uint32_t java_flags = (GetAccessFlags() & kAccJavaFlagsMask);
     bool is_constructor = IsConstructor();
     bool is_synchronized = IsSynchronized();
     bool skip_access_checks = SkipAccessChecks();
     bool is_fast_native = IsFastNative();
     bool is_copied = IsCopied();
     bool is_miranda = IsMiranda();
     bool is_default = IsDefault();
     bool is_default_conflict = IsDefaultConflicting();
     bool is_compilable = IsCompilable();
     bool must_count_locks = MustCountLocks();
     SetAccessFlags(new_value);
     DCHECK_EQ(java_flags, (GetAccessFlags() & kAccJavaFlagsMask));
     DCHECK_EQ(is_constructor, IsConstructor());
     DCHECK_EQ(is_synchronized, IsSynchronized());
     DCHECK_EQ(skip_access_checks, SkipAccessChecks());
     DCHECK_EQ(is_fast_native, IsFastNative());
     DCHECK_EQ(is_copied, IsCopied());
     DCHECK_EQ(is_miranda, IsMiranda());
     DCHECK_EQ(is_default, IsDefault());
     DCHECK_EQ(is_default_conflict, IsDefaultConflicting());
     DCHECK_EQ(is_compilable, IsCompilable());
     DCHECK_EQ(must_count_locks, MustCountLocks());
   } else {
     SetAccessFlags(new_value);
   }
 }

 template<ReadBarrierOption kReadBarrierOption, typename RootVisitorType>
 void ArtMethod::VisitRoots(RootVisitorType& visitor, PointerSize pointer_size) {
   if (LIKELY(!declaring_class_.IsNull())) {
     visitor.VisitRoot(declaring_class_.AddressWithoutBarrier());
     mirror::Class* klass = declaring_class_.Read<kReadBarrierOption>();
     if (UNLIKELY(klass->IsProxyClass())) {
       // For normal methods, dex cache shortcuts will be visited through the declaring class.
       // However, for proxies we need to keep the interface method alive, so we visit its roots.
       ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
           GetDexCacheResolvedMethods(pointer_size),
           GetDexMethodIndex(),
           pointer_size);
       DCHECK(interface_method != nullptr);
       DCHECK_EQ(interface_method,
                 Runtime::Current()->GetClassLinker()->FindMethodForProxy<kReadBarrierOption>(
                     klass, this));
       interface_method->VisitRoots(visitor, pointer_size);
     }
   }
 }

 template <typename Visitor>
 inline void ArtMethod::UpdateObjectsForImageRelocation(const Visitor& visitor,
                                                        PointerSize pointer_size) {
   mirror::Class* old_class = GetDeclaringClassUnchecked<kWithoutReadBarrier>();
   mirror::Class* new_class = visitor(old_class);
   if (old_class != new_class) {
     SetDeclaringClass(new_class);
   }
   ArtMethod** old_methods = GetDexCacheResolvedMethods(pointer_size);
   ArtMethod** new_methods = visitor(old_methods);
   if (old_methods != new_methods) {
     SetDexCacheResolvedMethods(new_methods, pointer_size);
   }
 }

 template <ReadBarrierOption kReadBarrierOption, typename Visitor>
 inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, PointerSize pointer_size) {
   if (IsNative<kReadBarrierOption>()) {
     const void* old_native_code = GetEntryPointFromJniPtrSize(pointer_size);
     const void* new_native_code = visitor(old_native_code);
     if (old_native_code != new_native_code) {
       SetEntryPointFromJniPtrSize(new_native_code, pointer_size);
     }
   } else {
     DCHECK(GetDataPtrSize(pointer_size) == nullptr);
   }
   const void* old_code = GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
   const void* new_code = visitor(old_code);
   if (old_code != new_code) {
     SetEntryPointFromQuickCompiledCodePtrSize(new_code, pointer_size);
   }
 }

 }  // namespace art

 #endif  // ART_RUNTIME_ART_METHOD_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_ART_METHOD_INL_H_
	#define ART_RUNTIME_ART_METHOD_INL_H_

	#include "art_method.h"

	#include "art_field.h"
	#include "base/logging.h"
	#include "class_linker-inl.h"
	#include "common_throws.h"
	#include "dex_file.h"
	#include "dex_file_annotations.h"
	#include "dex_file-inl.h"
	#include "gc_root-inl.h"
	#include "jit/profiling_info.h"
	#include "mirror/class-inl.h"
	#include "mirror/dex_cache-inl.h"
	#include "mirror/object-inl.h"
	#include "mirror/object_array.h"
	#include "mirror/string.h"
	#include "oat.h"
	#include "obj_ptr-inl.h"
	#include "quick/quick_method_frame_info.h"
	#include "read_barrier-inl.h"
	#include "runtime-inl.h"
	#include "scoped_thread_state_change-inl.h"
	#include "thread-inl.h"
	#include "utils.h"

	namespace art {

	template <ReadBarrierOption kReadBarrierOption>
	inline mirror::Class* ArtMethod::GetDeclaringClassUnchecked() {
	GcRootSource gc_root_source(this);
	return declaring_class_.Read<kReadBarrierOption>(&gc_root_source);
	}

	template <ReadBarrierOption kReadBarrierOption>
	inline mirror::Class* ArtMethod::GetDeclaringClass() {
	mirror::Class* result = GetDeclaringClassUnchecked<kReadBarrierOption>();
	if (kIsDebugBuild) {
	if (!IsRuntimeMethod()) {
	CHECK(result != nullptr) << this;
	if (kCheckDeclaringClassState) {
	if (!(result->IsIdxLoaded() \|\| result->IsErroneous())) {
	LOG(FATAL_WITHOUT_ABORT) << "Class status: " << result->GetStatus();
	LOG(FATAL) << result->PrettyClass();
	}
	}
	} else {
	CHECK(result == nullptr) << this;
	}
	}
	return result;
	}

	inline void ArtMethod::SetDeclaringClass(ObjPtr<mirror::Class> new_declaring_class) {
	declaring_class_ = GcRoot<mirror::Class>(new_declaring_class);
	}

	inline bool ArtMethod::CASDeclaringClass(mirror::Class* expected_class,
	mirror::Class* desired_class) {
	GcRoot<mirror::Class> expected_root(expected_class);
	GcRoot<mirror::Class> desired_root(desired_class);
	return reinterpret_cast<Atomic<GcRoot<mirror::Class>>*>(&declaring_class_)->
	CompareExchangeStrongSequentiallyConsistent(
	expected_root, desired_root);
	}

	inline uint16_t ArtMethod::GetMethodIndex() {
	DCHECK(IsRuntimeMethod() \|\| GetDeclaringClass()->IsResolved());
	return method_index_;
	}

	inline uint16_t ArtMethod::GetMethodIndexDuringLinking() {
	return method_index_;
	}

	inline uint32_t ArtMethod::GetDexMethodIndex() {
	if (kCheckDeclaringClassState) {
	CHECK(IsRuntimeMethod() \|\| GetDeclaringClass()->IsIdxLoaded() \|\|
	GetDeclaringClass()->IsErroneous());
	}
	return GetDexMethodIndexUnchecked();
	}

	inline ArtMethod** ArtMethod::GetDexCacheResolvedMethods(PointerSize pointer_size) {
	return GetNativePointer<ArtMethod**>(DexCacheResolvedMethodsOffset(pointer_size),
	pointer_size);
	}

	inline ArtMethod* ArtMethod::GetDexCacheResolvedMethod(uint16_t method_index,
	PointerSize pointer_size) {
	// NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
	// without accessing the DexCache and we don't want to do that in release build.
	DCHECK_LT(method_index,
	GetInterfaceMethodIfProxy(pointer_size)->GetDexCache()->NumResolvedMethods());
	ArtMethod* method = mirror::DexCache::GetElementPtrSize(GetDexCacheResolvedMethods(pointer_size),
	method_index,
	pointer_size);
	if (LIKELY(method != nullptr)) {
	auto* declaring_class = method->GetDeclaringClass();
	if (LIKELY(declaring_class == nullptr \|\| !declaring_class->IsErroneous())) {
	return method;
	}
	}
	return nullptr;
	}

	inline void ArtMethod::SetDexCacheResolvedMethod(uint16_t method_index,
	ArtMethod* new_method,
	PointerSize pointer_size) {
	// NOTE: Unchecked, i.e. not throwing AIOOB. We don't even know the length here
	// without accessing the DexCache and we don't want to do that in release build.
	DCHECK_LT(method_index,
	GetInterfaceMethodIfProxy(pointer_size)->GetDexCache()->NumResolvedMethods());
	DCHECK(new_method == nullptr \|\| new_method->GetDeclaringClass() != nullptr);
	mirror::DexCache::SetElementPtrSize(GetDexCacheResolvedMethods(pointer_size),
	method_index,
	new_method,
	pointer_size);
	}

	inline bool ArtMethod::HasDexCacheResolvedMethods(PointerSize pointer_size) {
	return GetDexCacheResolvedMethods(pointer_size) != nullptr;
	}

	inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod** other_cache,
	PointerSize pointer_size) {
	return GetDexCacheResolvedMethods(pointer_size) == other_cache;
	}

	inline bool ArtMethod::HasSameDexCacheResolvedMethods(ArtMethod* other, PointerSize pointer_size) {
	return GetDexCacheResolvedMethods(pointer_size) ==
	other->GetDexCacheResolvedMethods(pointer_size);
	}

	inline mirror::Class* ArtMethod::GetClassFromTypeIndex(dex::TypeIndex type_idx, bool resolve) {
	// TODO: Refactor this function into two functions, Resolve...() and Lookup...()
	// so that we can properly annotate it with no-suspension possible / suspension possible.
	ObjPtr<mirror::DexCache> dex_cache = GetDexCache();
	ObjPtr<mirror::Class> type = dex_cache->GetResolvedType(type_idx);
	if (UNLIKELY(type == nullptr)) {
	ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
	if (resolve) {
	type = class_linker->ResolveType(type_idx, this);
	CHECK(type != nullptr \|\| Thread::Current()->IsExceptionPending());
	} else {
	type = class_linker->LookupResolvedType(
	*dex_cache->GetDexFile(), type_idx, dex_cache, GetClassLoader());
	}
	}
	return type.Ptr();
	}

	inline bool ArtMethod::CheckIncompatibleClassChange(InvokeType type) {
	switch (type) {
	case kStatic:
	return !IsStatic();
	case kDirect:
	return !IsDirect() \|\| IsStatic();
	case kVirtual: {
	// We have an error if we are direct or a non-copied (i.e. not part of a real class) interface
	// method.
	mirror::Class* methods_class = GetDeclaringClass();
	return IsDirect() \|\| (methods_class->IsInterface() && !IsCopied());
	}
	case kSuper:
	// Constructors and static methods are called with invoke-direct.
	return IsConstructor() \|\| IsStatic();
	case kInterface: {
	mirror::Class* methods_class = GetDeclaringClass();
	return IsDirect() \|\| !(methods_class->IsInterface() \|\| methods_class->IsObjectClass());
	}
	default:
	LOG(FATAL) << "Unreachable - invocation type: " << type;
	UNREACHABLE();
	}
	}

	inline bool ArtMethod::IsCalleeSaveMethod() {
	if (!IsRuntimeMethod()) {
	return false;
	}
	Runtime* runtime = Runtime::Current();
	bool result = false;
	for (int i = 0; i < Runtime::kLastCalleeSaveType; i++) {
	if (this == runtime->GetCalleeSaveMethod(Runtime::CalleeSaveType(i))) {
	result = true;
	break;
	}
	}
	return result;
	}

	inline bool ArtMethod::IsResolutionMethod() {
	bool result = this == Runtime::Current()->GetResolutionMethod();
	// Check that if we do think it is phony it looks like the resolution method.
	DCHECK(!result \|\| IsRuntimeMethod());
	return result;
	}

	inline bool ArtMethod::IsImtUnimplementedMethod() {
	bool result = this == Runtime::Current()->GetImtUnimplementedMethod();
	// Check that if we do think it is phony it looks like the imt unimplemented method.
	DCHECK(!result \|\| IsRuntimeMethod());
	return result;
	}

	inline const DexFile* ArtMethod::GetDexFile() {
	// It is safe to avoid the read barrier here since the dex file is constant, so if we read the
	// from-space dex file pointer it will be equal to the to-space copy.
	return GetDexCache<kWithoutReadBarrier>()->GetDexFile();
	}

	inline const char* ArtMethod::GetDeclaringClassDescriptor() {
	uint32_t dex_method_idx = GetDexMethodIndex();
	if (UNLIKELY(dex_method_idx == DexFile::kDexNoIndex)) {
	return "<runtime method>";
	}
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodDeclaringClassDescriptor(dex_file->GetMethodId(dex_method_idx));
	}

	inline const char* ArtMethod::GetShorty() {
	uint32_t unused_length;
	return GetShorty(&unused_length);
	}

	inline const char* ArtMethod::GetShorty(uint32_t* out_length) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodShorty(dex_file->GetMethodId(GetDexMethodIndex()), out_length);
	}

	inline const Signature ArtMethod::GetSignature() {
	uint32_t dex_method_idx = GetDexMethodIndex();
	if (dex_method_idx != DexFile::kDexNoIndex) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodSignature(dex_file->GetMethodId(dex_method_idx));
	}
	return Signature::NoSignature();
	}

	inline const char* ArtMethod::GetName() {
	uint32_t dex_method_idx = GetDexMethodIndex();
	if (LIKELY(dex_method_idx != DexFile::kDexNoIndex)) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodName(dex_file->GetMethodId(dex_method_idx));
	}
	Runtime* const runtime = Runtime::Current();
	if (this == runtime->GetResolutionMethod()) {
	return "<runtime internal resolution method>";
	} else if (this == runtime->GetImtConflictMethod()) {
	return "<runtime internal imt conflict method>";
	} else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveAllCalleeSaves)) {
	return "<runtime internal callee-save all registers method>";
	} else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveRefsOnly)) {
	return "<runtime internal callee-save reference registers method>";
	} else if (this == runtime->GetCalleeSaveMethod(Runtime::kSaveRefsAndArgs)) {
	return "<runtime internal callee-save reference and argument registers method>";
	} else {
	return "<unknown runtime internal method>";
	}
	}

	inline const DexFile::CodeItem* ArtMethod::GetCodeItem() {
	return GetDexFile()->GetCodeItem(GetCodeItemOffset());
	}

	inline bool ArtMethod::IsResolvedTypeIdx(dex::TypeIndex type_idx) {
	DCHECK(!IsProxyMethod());
	return GetClassFromTypeIndex(type_idx, /* resolve */ false) != nullptr;
	}

	inline int32_t ArtMethod::GetLineNumFromDexPC(uint32_t dex_pc) {
	DCHECK(!IsProxyMethod());
	if (dex_pc == DexFile::kDexNoIndex) {
	return IsNative() ? -2 : -1;
	}
	return annotations::GetLineNumFromPC(GetDexFile(), this, dex_pc);
	}

	inline const DexFile::ProtoId& ArtMethod::GetPrototype() {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodPrototype(dex_file->GetMethodId(GetDexMethodIndex()));
	}

	inline const DexFile::TypeList* ArtMethod::GetParameterTypeList() {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	const DexFile::ProtoId& proto = dex_file->GetMethodPrototype(
	dex_file->GetMethodId(GetDexMethodIndex()));
	return dex_file->GetProtoParameters(proto);
	}

	inline const char* ArtMethod::GetDeclaringClassSourceFile() {
	DCHECK(!IsProxyMethod());
	return GetDeclaringClass()->GetSourceFile();
	}

	inline uint16_t ArtMethod::GetClassDefIndex() {
	DCHECK(!IsProxyMethod());
	if (LIKELY(!IsObsolete())) {
	return GetDeclaringClass()->GetDexClassDefIndex();
	} else {
	return FindObsoleteDexClassDefIndex();
	}
	}

	inline const DexFile::ClassDef& ArtMethod::GetClassDef() {
	DCHECK(!IsProxyMethod());
	return GetDexFile()->GetClassDef(GetClassDefIndex());
	}

	inline const char* ArtMethod::GetReturnTypeDescriptor() {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
	const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
	return dex_file->GetTypeDescriptor(dex_file->GetTypeId(proto_id.return_type_idx_));
	}

	inline const char* ArtMethod::GetTypeDescriptorFromTypeIdx(dex::TypeIndex type_idx) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetTypeDescriptor(dex_file->GetTypeId(type_idx));
	}

	inline mirror::ClassLoader* ArtMethod::GetClassLoader() {
	DCHECK(!IsProxyMethod());
	return GetDeclaringClass()->GetClassLoader();
	}

	template <ReadBarrierOption kReadBarrierOption>
	inline mirror::DexCache* ArtMethod::GetDexCache() {
	if (LIKELY(!IsObsolete())) {
	mirror::Class* klass = GetDeclaringClass<kReadBarrierOption>();
	return klass->GetDexCache<kDefaultVerifyFlags, kReadBarrierOption>();
	} else {
	DCHECK(!IsProxyMethod());
	return GetObsoleteDexCache();
	}
	}

	inline bool ArtMethod::IsProxyMethod() {
	// Avoid read barrier since the from-space version of the class will have the correct proxy class
	// flags since they are constant for the lifetime of the class.
	return GetDeclaringClass<kWithoutReadBarrier>()->IsProxyClass();
	}

	inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(PointerSize pointer_size) {
	if (LIKELY(!IsProxyMethod())) {
	return this;
	}
	ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
	GetDexCacheResolvedMethods(pointer_size),
	GetDexMethodIndex(),
	pointer_size);
	DCHECK(interface_method != nullptr);
	DCHECK_EQ(interface_method,
	Runtime::Current()->GetClassLinker()->FindMethodForProxy(GetDeclaringClass(), this));
	return interface_method;
	}

	inline void ArtMethod::SetDexCacheResolvedMethods(ArtMethod** new_dex_cache_methods,
	PointerSize pointer_size) {
	SetNativePointer(DexCacheResolvedMethodsOffset(pointer_size),
	new_dex_cache_methods,
	pointer_size);
	}

	inline mirror::Class* ArtMethod::GetReturnType(bool resolve) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
	const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
	dex::TypeIndex return_type_idx = proto_id.return_type_idx_;
	return GetClassFromTypeIndex(return_type_idx, resolve);
	}

	inline bool ArtMethod::HasSingleImplementation() {
	if (IsFinal() \|\| GetDeclaringClass()->IsFinal()) {
	// We don't set kAccSingleImplementation for these cases since intrinsic
	// can use the flag also.
	return true;
	}
	return (GetAccessFlags() & kAccSingleImplementation) != 0;
	}

	inline void ArtMethod::SetIntrinsic(uint32_t intrinsic) {
	DCHECK(IsUint<8>(intrinsic));
	// Currently we only do intrinsics for static/final methods or methods of final
	// classes. We don't set kHasSingleImplementation for those methods.
	DCHECK(IsStatic() \|\| IsFinal() \|\| GetDeclaringClass()->IsFinal()) <<
	"Potential conflict with kAccSingleImplementation";
	uint32_t new_value = (GetAccessFlags() & kAccFlagsNotUsedByIntrinsic) \|
	kAccIntrinsic \|
	(intrinsic << POPCOUNT(kAccFlagsNotUsedByIntrinsic));
	if (kIsDebugBuild) {
	uint32_t java_flags = (GetAccessFlags() & kAccJavaFlagsMask);
	bool is_constructor = IsConstructor();
	bool is_synchronized = IsSynchronized();
	bool skip_access_checks = SkipAccessChecks();
	bool is_fast_native = IsFastNative();
	bool is_copied = IsCopied();
	bool is_miranda = IsMiranda();
	bool is_default = IsDefault();
	bool is_default_conflict = IsDefaultConflicting();
	bool is_compilable = IsCompilable();
	bool must_count_locks = MustCountLocks();
	SetAccessFlags(new_value);
	DCHECK_EQ(java_flags, (GetAccessFlags() & kAccJavaFlagsMask));
	DCHECK_EQ(is_constructor, IsConstructor());
	DCHECK_EQ(is_synchronized, IsSynchronized());
	DCHECK_EQ(skip_access_checks, SkipAccessChecks());
	DCHECK_EQ(is_fast_native, IsFastNative());
	DCHECK_EQ(is_copied, IsCopied());
	DCHECK_EQ(is_miranda, IsMiranda());
	DCHECK_EQ(is_default, IsDefault());
	DCHECK_EQ(is_default_conflict, IsDefaultConflicting());
	DCHECK_EQ(is_compilable, IsCompilable());
	DCHECK_EQ(must_count_locks, MustCountLocks());
	} else {
	SetAccessFlags(new_value);
	}
	}

	template<ReadBarrierOption kReadBarrierOption, typename RootVisitorType>
	void ArtMethod::VisitRoots(RootVisitorType& visitor, PointerSize pointer_size) {
	if (LIKELY(!declaring_class_.IsNull())) {
	visitor.VisitRoot(declaring_class_.AddressWithoutBarrier());
	mirror::Class* klass = declaring_class_.Read<kReadBarrierOption>();
	if (UNLIKELY(klass->IsProxyClass())) {
	// For normal methods, dex cache shortcuts will be visited through the declaring class.
	// However, for proxies we need to keep the interface method alive, so we visit its roots.
	ArtMethod* interface_method = mirror::DexCache::GetElementPtrSize(
	GetDexCacheResolvedMethods(pointer_size),
	GetDexMethodIndex(),
	pointer_size);
	DCHECK(interface_method != nullptr);
	DCHECK_EQ(interface_method,
	Runtime::Current()->GetClassLinker()->FindMethodForProxy<kReadBarrierOption>(
	klass, this));
	interface_method->VisitRoots(visitor, pointer_size);
	}
	}
	}

	template <typename Visitor>
	inline void ArtMethod::UpdateObjectsForImageRelocation(const Visitor& visitor,
	PointerSize pointer_size) {
	mirror::Class* old_class = GetDeclaringClassUnchecked<kWithoutReadBarrier>();
	mirror::Class* new_class = visitor(old_class);
	if (old_class != new_class) {
	SetDeclaringClass(new_class);
	}
	ArtMethod** old_methods = GetDexCacheResolvedMethods(pointer_size);
	ArtMethod** new_methods = visitor(old_methods);
	if (old_methods != new_methods) {
	SetDexCacheResolvedMethods(new_methods, pointer_size);
	}
	}

	template <ReadBarrierOption kReadBarrierOption, typename Visitor>
	inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, PointerSize pointer_size) {
	if (IsNative<kReadBarrierOption>()) {
	const void* old_native_code = GetEntryPointFromJniPtrSize(pointer_size);
	const void* new_native_code = visitor(old_native_code);
	if (old_native_code != new_native_code) {
	SetEntryPointFromJniPtrSize(new_native_code, pointer_size);
	}
	} else {
	DCHECK(GetDataPtrSize(pointer_size) == nullptr);
	}
	const void* old_code = GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
	const void* new_code = visitor(old_code);
	if (old_code != new_code) {
	SetEntryPointFromQuickCompiledCodePtrSize(new_code, pointer_size);
	}
	}

	} // namespace art

	#endif // ART_RUNTIME_ART_METHOD_INL_H_