runtime/art_method-inl.h - SHIFTPHONES/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_ART_METHOD_INL_H_
 #define ART_RUNTIME_ART_METHOD_INL_H_

 #include "art_method.h"

 #include "art_field.h"
 #include "base/callee_save_type.h"
 #include "class_linker-inl.h"
 #include "common_throws.h"
 #include "dex/code_item_accessors-inl.h"
 #include "dex/dex_file-inl.h"
 #include "dex/dex_file_annotations.h"
 #include "dex/dex_file_types.h"
 #include "dex/invoke_type.h"
 #include "dex/primitive.h"
 #include "dex/signature.h"
 #include "gc_root-inl.h"
 #include "imtable-inl.h"
 #include "intrinsics_enum.h"
 #include "jit/jit.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 "obj_ptr-inl.h"
 #include "quick/quick_method_frame_info.h"
 #include "read_barrier-inl.h"
 #include "runtime-inl.h"
 #include "thread-current-inl.h"

 namespace art {

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

 template <ReadBarrierOption kReadBarrierOption>
 inline ObjPtr<mirror::Class> ArtMethod::GetDeclaringClass() {
   ObjPtr<mirror::Class> result = GetDeclaringClassUnchecked<kReadBarrierOption>();
   if (kIsDebugBuild) {
     if (!IsRuntimeMethod()) {
       CHECK(result != nullptr) << this;
     } 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(ObjPtr<mirror::Class> expected_class,
                                          ObjPtr<mirror::Class> desired_class) {
   GcRoot<mirror::Class> expected_root(expected_class);
   GcRoot<mirror::Class> desired_root(desired_class);
   auto atomic_root_class = reinterpret_cast<Atomic<GcRoot<mirror::Class>>*>(&declaring_class_);
   return atomic_root_class->CompareAndSetStrongSequentiallyConsistent(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 ObjPtr<mirror::Class> ArtMethod::LookupResolvedClassFromTypeIndex(dex::TypeIndex type_idx) {
   ScopedAssertNoThreadSuspension ants(__FUNCTION__);
   ObjPtr<mirror::Class> type =
       Runtime::Current()->GetClassLinker()->LookupResolvedType(type_idx, this);
   DCHECK(!Thread::Current()->IsExceptionPending());
   return type;
 }

 inline ObjPtr<mirror::Class> ArtMethod::ResolveClassFromTypeIndex(dex::TypeIndex type_idx) {
   ObjPtr<mirror::Class> type = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, this);
   DCHECK_EQ(type == nullptr, Thread::Current()->IsExceptionPending());
   return type;
 }

 inline bool ArtMethod::IsOverridableByDefaultMethod() {
   // It is safe to avoid the read barrier here since the constant interface flag
   // in the `Class` object is stored before creating the `ArtMethod` and storing
   // the declaring class reference. See `ReadBarrierOption`.
   return GetDeclaringClass<kWithoutReadBarrier>()->IsInterface();
 }

 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.
       ObjPtr<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: {
       ObjPtr<mirror::Class> methods_class = GetDeclaringClass();
       return IsDirect() || !(methods_class->IsInterface() || methods_class->IsObjectClass());
     }
     case kPolymorphic:
       return !IsSignaturePolymorphic();
     default:
       LOG(FATAL) << "Unreachable - invocation type: " << type;
       UNREACHABLE();
   }
 }

 inline bool ArtMethod::IsCalleeSaveMethod() {
   if (!IsRuntimeMethod()) {
     return false;
   }
   Runtime* runtime = Runtime::Current();
   bool result = false;
   for (uint32_t i = 0; i < static_cast<uint32_t>(CalleeSaveType::kLastCalleeSaveType); i++) {
     if (this == runtime->GetCalleeSaveMethod(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_IMPLIES(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_IMPLIES(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 == dex::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 != dex::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 != dex::kDexNoIndex)) {
     DCHECK(!IsProxyMethod());
     const DexFile* dex_file = GetDexFile();
     return dex_file->GetMethodName(dex_file->GetMethodId(dex_method_idx));
   }
   return GetRuntimeMethodName();
 }

 inline std::string_view ArtMethod::GetNameView() {
   uint32_t dex_method_idx = GetDexMethodIndex();
   if (LIKELY(dex_method_idx != dex::kDexNoIndex)) {
     DCHECK(!IsProxyMethod());
     const DexFile* dex_file = GetDexFile();
     return dex_file->GetMethodNameView(dex_method_idx);
   }
   return GetRuntimeMethodName();
 }

 inline ObjPtr<mirror::String> ArtMethod::ResolveNameString() {
   DCHECK(!IsProxyMethod());
   const dex::MethodId& method_id = GetDexFile()->GetMethodId(GetDexMethodIndex());
   return Runtime::Current()->GetClassLinker()->ResolveString(method_id.name_idx_, this);
 }

 inline bool ArtMethod::NameEquals(ObjPtr<mirror::String> name) {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   const dex::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
   const dex::StringIndex name_idx = method_id.name_idx_;
   uint32_t utf16_length;
   const char* utf8_name = dex_file->StringDataAndUtf16LengthByIdx(name_idx, &utf16_length);
   return dchecked_integral_cast<uint32_t>(name->GetLength()) == utf16_length &&
          name->Equals(utf8_name);
 }

 inline const dex::CodeItem* ArtMethod::GetCodeItem() {
   if (!HasCodeItem()) {
     return nullptr;
   }
   Runtime* runtime = Runtime::Current();
   PointerSize pointer_size = runtime->GetClassLinker()->GetImagePointerSize();
   return runtime->IsAotCompiler()
       ? GetDexFile()->GetCodeItem(reinterpret_cast32<uint32_t>(GetDataPtrSize(pointer_size)))
       : reinterpret_cast<const dex::CodeItem*>(
           reinterpret_cast<uintptr_t>(GetDataPtrSize(pointer_size)) & ~1);
 }

 inline bool ArtMethod::IsResolvedTypeIdx(dex::TypeIndex type_idx) {
   DCHECK(!IsProxyMethod());
   return LookupResolvedClassFromTypeIndex(type_idx) != nullptr;
 }

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

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

 inline const dex::TypeList* ArtMethod::GetParameterTypeList() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   const dex::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 dex::ClassDef& ArtMethod::GetClassDef() {
   DCHECK(!IsProxyMethod());
   return GetDexFile()->GetClassDef(GetClassDefIndex());
 }

 inline size_t ArtMethod::GetNumberOfParameters() {
   constexpr size_t return_type_count = 1u;
   uint32_t shorty_length;
   GetShorty(&shorty_length);
   return shorty_length - return_type_count;
 }

 inline const char* ArtMethod::GetReturnTypeDescriptor() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetTypeDescriptor(dex_file->GetTypeId(GetReturnTypeIndex()));
 }

 inline Primitive::Type ArtMethod::GetReturnTypePrimitive() {
   return Primitive::GetType(GetReturnTypeDescriptor()[0]);
 }

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

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

 inline bool ArtMethod::IsProxyMethod() {
   DCHECK(!IsRuntimeMethod()) << "ArtMethod::IsProxyMethod called on a runtime method";
   // No read barrier needed, we're reading the constant declaring class only to read
   // the constant proxy flag. See ReadBarrierOption.
   return GetDeclaringClass<kWithoutReadBarrier>()->IsProxyClass();
 }

 inline ArtMethod* ArtMethod::GetInterfaceMethodForProxyUnchecked(PointerSize pointer_size) {
   DCHECK(IsProxyMethod());
   // Do not check IsAssignableFrom() here as it relies on raw reference comparison
   // which may give false negatives while visiting references for a non-CC moving GC.
   return reinterpret_cast<ArtMethod*>(GetDataPtrSize(pointer_size));
 }

 inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(PointerSize pointer_size) {
   if (LIKELY(!IsProxyMethod())) {
     return this;
   }
   ArtMethod* interface_method = GetInterfaceMethodForProxyUnchecked(pointer_size);
   // We can check that the proxy class implements the interface only if the proxy class
   // is resolved, otherwise the interface table is not yet initialized.
   DCHECK_IMPLIES(GetDeclaringClass()->IsResolved(),
                  interface_method->GetDeclaringClass()->IsAssignableFrom(GetDeclaringClass()));
   return interface_method;
 }

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

 inline ObjPtr<mirror::Class> ArtMethod::LookupResolvedReturnType() {
   return LookupResolvedClassFromTypeIndex(GetReturnTypeIndex());
 }

 inline ObjPtr<mirror::Class> ArtMethod::ResolveReturnType() {
   return ResolveClassFromTypeIndex(GetReturnTypeIndex());
 }

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

 template<ReadBarrierOption kReadBarrierOption, typename RootVisitorType>
 void ArtMethod::VisitRoots(RootVisitorType& visitor, PointerSize pointer_size) {
   if (LIKELY(!declaring_class_.IsNull())) {
     visitor.VisitRoot(declaring_class_.AddressWithoutBarrier());
     ObjPtr<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 = GetInterfaceMethodForProxyUnchecked(pointer_size);
       DCHECK(interface_method != nullptr);
       interface_method->VisitRoots<kReadBarrierOption>(visitor, pointer_size);
     }
   }
 }

 template <typename Visitor>
 inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, PointerSize pointer_size) {
   if (IsNative()) {
     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);
     }
   }
   const void* old_code = GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
   const void* new_code = visitor(old_code);
   if (old_code != new_code) {
     SetEntryPointFromQuickCompiledCodePtrSize(new_code, pointer_size);
   }
 }

 inline CodeItemInstructionAccessor ArtMethod::DexInstructions() {
   return CodeItemInstructionAccessor(*GetDexFile(), GetCodeItem());
 }

 inline CodeItemDataAccessor ArtMethod::DexInstructionData() {
   return CodeItemDataAccessor(*GetDexFile(), GetCodeItem());
 }

 inline CodeItemDebugInfoAccessor ArtMethod::DexInstructionDebugInfo() {
   return CodeItemDebugInfoAccessor(*GetDexFile(), GetCodeItem(), GetDexMethodIndex());
 }

 inline bool ArtMethod::CounterHasChanged(uint16_t threshold) {
   DCHECK(!IsAbstract());
   DCHECK_EQ(threshold, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
   return hotness_count_ != threshold;
 }

 inline void ArtMethod::ResetCounter(uint16_t new_value) {
   if (IsAbstract()) {
     return;
   }
   if (IsMemorySharedMethod()) {
     return;
   }
   DCHECK_EQ(new_value, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
   // Avoid dirtying the value if possible.
   if (hotness_count_ != new_value) {
     hotness_count_ = new_value;
   }
 }

 inline void ArtMethod::SetHotCounter() {
   DCHECK(!IsAbstract());
   // Avoid dirtying the value if possible.
   if (hotness_count_ != 0) {
     hotness_count_ = 0;
   }
 }

 inline void ArtMethod::UpdateCounter(int32_t new_samples) {
   DCHECK(!IsAbstract());
   DCHECK_GT(new_samples, 0);
   DCHECK_LE(new_samples, std::numeric_limits<uint16_t>::max());
   if (IsMemorySharedMethod()) {
     return;
   }
   uint16_t old_hotness_count = hotness_count_;
   uint16_t new_count = (old_hotness_count <= new_samples) ? 0u : old_hotness_count - new_samples;
   // Avoid dirtying the value if possible.
   if (old_hotness_count != new_count) {
     hotness_count_ = new_count;
   }
 }

 inline bool ArtMethod::CounterIsHot() {
   DCHECK(!IsAbstract());
   return hotness_count_ == 0;
 }

 inline bool ArtMethod::CounterHasReached(uint16_t samples, uint16_t threshold) {
   DCHECK(!IsAbstract());
   DCHECK_EQ(threshold, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
   DCHECK_LE(samples, threshold);
   return hotness_count_ <= (threshold - samples);
 }

 inline uint16_t ArtMethod::GetCounter() {
   DCHECK(!IsAbstract());
   return hotness_count_;
 }

 inline uint32_t ArtMethod::GetImtIndex() {
   if (LIKELY(IsAbstract())) {
     return imt_index_;
   } else {
     return ImTable::GetImtIndex(this);
   }
 }

 inline void ArtMethod::CalculateAndSetImtIndex() {
   DCHECK(IsAbstract()) << PrettyMethod();
   imt_index_ = ImTable::GetImtIndex(this);
 }

 }  // 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/callee_save_type.h"
	#include "class_linker-inl.h"
	#include "common_throws.h"
	#include "dex/code_item_accessors-inl.h"
	#include "dex/dex_file-inl.h"
	#include "dex/dex_file_annotations.h"
	#include "dex/dex_file_types.h"
	#include "dex/invoke_type.h"
	#include "dex/primitive.h"
	#include "dex/signature.h"
	#include "gc_root-inl.h"
	#include "imtable-inl.h"
	#include "intrinsics_enum.h"
	#include "jit/jit.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 "obj_ptr-inl.h"
	#include "quick/quick_method_frame_info.h"
	#include "read_barrier-inl.h"
	#include "runtime-inl.h"
	#include "thread-current-inl.h"

	namespace art {

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

	template <ReadBarrierOption kReadBarrierOption>
	inline ObjPtr<mirror::Class> ArtMethod::GetDeclaringClass() {
	ObjPtr<mirror::Class> result = GetDeclaringClassUnchecked<kReadBarrierOption>();
	if (kIsDebugBuild) {
	if (!IsRuntimeMethod()) {
	CHECK(result != nullptr) << this;
	} 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(ObjPtr<mirror::Class> expected_class,
	ObjPtr<mirror::Class> desired_class) {
	GcRoot<mirror::Class> expected_root(expected_class);
	GcRoot<mirror::Class> desired_root(desired_class);
	auto atomic_root_class = reinterpret_cast<Atomic<GcRoot<mirror::Class>>*>(&declaring_class_);
	return atomic_root_class->CompareAndSetStrongSequentiallyConsistent(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 ObjPtr<mirror::Class> ArtMethod::LookupResolvedClassFromTypeIndex(dex::TypeIndex type_idx) {
	ScopedAssertNoThreadSuspension ants(__FUNCTION__);
	ObjPtr<mirror::Class> type =
	Runtime::Current()->GetClassLinker()->LookupResolvedType(type_idx, this);
	DCHECK(!Thread::Current()->IsExceptionPending());
	return type;
	}

	inline ObjPtr<mirror::Class> ArtMethod::ResolveClassFromTypeIndex(dex::TypeIndex type_idx) {
	ObjPtr<mirror::Class> type = Runtime::Current()->GetClassLinker()->ResolveType(type_idx, this);
	DCHECK_EQ(type == nullptr, Thread::Current()->IsExceptionPending());
	return type;
	}

	inline bool ArtMethod::IsOverridableByDefaultMethod() {
	// It is safe to avoid the read barrier here since the constant interface flag
	// in the `Class` object is stored before creating the `ArtMethod` and storing
	// the declaring class reference. See `ReadBarrierOption`.
	return GetDeclaringClass<kWithoutReadBarrier>()->IsInterface();
	}

	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.
	ObjPtr<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: {
	ObjPtr<mirror::Class> methods_class = GetDeclaringClass();
	return IsDirect() \|\| !(methods_class->IsInterface() \|\| methods_class->IsObjectClass());
	}
	case kPolymorphic:
	return !IsSignaturePolymorphic();
	default:
	LOG(FATAL) << "Unreachable - invocation type: " << type;
	UNREACHABLE();
	}
	}

	inline bool ArtMethod::IsCalleeSaveMethod() {
	if (!IsRuntimeMethod()) {
	return false;
	}
	Runtime* runtime = Runtime::Current();
	bool result = false;
	for (uint32_t i = 0; i < static_cast<uint32_t>(CalleeSaveType::kLastCalleeSaveType); i++) {
	if (this == runtime->GetCalleeSaveMethod(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_IMPLIES(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_IMPLIES(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 == dex::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 != dex::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 != dex::kDexNoIndex)) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodName(dex_file->GetMethodId(dex_method_idx));
	}
	return GetRuntimeMethodName();
	}

	inline std::string_view ArtMethod::GetNameView() {
	uint32_t dex_method_idx = GetDexMethodIndex();
	if (LIKELY(dex_method_idx != dex::kDexNoIndex)) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetMethodNameView(dex_method_idx);
	}
	return GetRuntimeMethodName();
	}

	inline ObjPtr<mirror::String> ArtMethod::ResolveNameString() {
	DCHECK(!IsProxyMethod());
	const dex::MethodId& method_id = GetDexFile()->GetMethodId(GetDexMethodIndex());
	return Runtime::Current()->GetClassLinker()->ResolveString(method_id.name_idx_, this);
	}

	inline bool ArtMethod::NameEquals(ObjPtr<mirror::String> name) {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	const dex::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
	const dex::StringIndex name_idx = method_id.name_idx_;
	uint32_t utf16_length;
	const char* utf8_name = dex_file->StringDataAndUtf16LengthByIdx(name_idx, &utf16_length);
	return dchecked_integral_cast<uint32_t>(name->GetLength()) == utf16_length &&
	name->Equals(utf8_name);
	}

	inline const dex::CodeItem* ArtMethod::GetCodeItem() {
	if (!HasCodeItem()) {
	return nullptr;
	}
	Runtime* runtime = Runtime::Current();
	PointerSize pointer_size = runtime->GetClassLinker()->GetImagePointerSize();
	return runtime->IsAotCompiler()
	? GetDexFile()->GetCodeItem(reinterpret_cast32<uint32_t>(GetDataPtrSize(pointer_size)))
	: reinterpret_cast<const dex::CodeItem*>(
	reinterpret_cast<uintptr_t>(GetDataPtrSize(pointer_size)) & ~1);
	}

	inline bool ArtMethod::IsResolvedTypeIdx(dex::TypeIndex type_idx) {
	DCHECK(!IsProxyMethod());
	return LookupResolvedClassFromTypeIndex(type_idx) != nullptr;
	}

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

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

	inline const dex::TypeList* ArtMethod::GetParameterTypeList() {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	const dex::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 dex::ClassDef& ArtMethod::GetClassDef() {
	DCHECK(!IsProxyMethod());
	return GetDexFile()->GetClassDef(GetClassDefIndex());
	}

	inline size_t ArtMethod::GetNumberOfParameters() {
	constexpr size_t return_type_count = 1u;
	uint32_t shorty_length;
	GetShorty(&shorty_length);
	return shorty_length - return_type_count;
	}

	inline const char* ArtMethod::GetReturnTypeDescriptor() {
	DCHECK(!IsProxyMethod());
	const DexFile* dex_file = GetDexFile();
	return dex_file->GetTypeDescriptor(dex_file->GetTypeId(GetReturnTypeIndex()));
	}

	inline Primitive::Type ArtMethod::GetReturnTypePrimitive() {
	return Primitive::GetType(GetReturnTypeDescriptor()[0]);
	}

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

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

	inline bool ArtMethod::IsProxyMethod() {
	DCHECK(!IsRuntimeMethod()) << "ArtMethod::IsProxyMethod called on a runtime method";
	// No read barrier needed, we're reading the constant declaring class only to read
	// the constant proxy flag. See ReadBarrierOption.
	return GetDeclaringClass<kWithoutReadBarrier>()->IsProxyClass();
	}

	inline ArtMethod* ArtMethod::GetInterfaceMethodForProxyUnchecked(PointerSize pointer_size) {
	DCHECK(IsProxyMethod());
	// Do not check IsAssignableFrom() here as it relies on raw reference comparison
	// which may give false negatives while visiting references for a non-CC moving GC.
	return reinterpret_cast<ArtMethod*>(GetDataPtrSize(pointer_size));
	}

	inline ArtMethod* ArtMethod::GetInterfaceMethodIfProxy(PointerSize pointer_size) {
	if (LIKELY(!IsProxyMethod())) {
	return this;
	}
	ArtMethod* interface_method = GetInterfaceMethodForProxyUnchecked(pointer_size);
	// We can check that the proxy class implements the interface only if the proxy class
	// is resolved, otherwise the interface table is not yet initialized.
	DCHECK_IMPLIES(GetDeclaringClass()->IsResolved(),
	interface_method->GetDeclaringClass()->IsAssignableFrom(GetDeclaringClass()));
	return interface_method;
	}

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

	inline ObjPtr<mirror::Class> ArtMethod::LookupResolvedReturnType() {
	return LookupResolvedClassFromTypeIndex(GetReturnTypeIndex());
	}

	inline ObjPtr<mirror::Class> ArtMethod::ResolveReturnType() {
	return ResolveClassFromTypeIndex(GetReturnTypeIndex());
	}

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

	template<ReadBarrierOption kReadBarrierOption, typename RootVisitorType>
	void ArtMethod::VisitRoots(RootVisitorType& visitor, PointerSize pointer_size) {
	if (LIKELY(!declaring_class_.IsNull())) {
	visitor.VisitRoot(declaring_class_.AddressWithoutBarrier());
	ObjPtr<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 = GetInterfaceMethodForProxyUnchecked(pointer_size);
	DCHECK(interface_method != nullptr);
	interface_method->VisitRoots<kReadBarrierOption>(visitor, pointer_size);
	}
	}
	}

	template <typename Visitor>
	inline void ArtMethod::UpdateEntrypoints(const Visitor& visitor, PointerSize pointer_size) {
	if (IsNative()) {
	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);
	}
	}
	const void* old_code = GetEntryPointFromQuickCompiledCodePtrSize(pointer_size);
	const void* new_code = visitor(old_code);
	if (old_code != new_code) {
	SetEntryPointFromQuickCompiledCodePtrSize(new_code, pointer_size);
	}
	}

	inline CodeItemInstructionAccessor ArtMethod::DexInstructions() {
	return CodeItemInstructionAccessor(*GetDexFile(), GetCodeItem());
	}

	inline CodeItemDataAccessor ArtMethod::DexInstructionData() {
	return CodeItemDataAccessor(*GetDexFile(), GetCodeItem());
	}

	inline CodeItemDebugInfoAccessor ArtMethod::DexInstructionDebugInfo() {
	return CodeItemDebugInfoAccessor(*GetDexFile(), GetCodeItem(), GetDexMethodIndex());
	}

	inline bool ArtMethod::CounterHasChanged(uint16_t threshold) {
	DCHECK(!IsAbstract());
	DCHECK_EQ(threshold, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
	return hotness_count_ != threshold;
	}

	inline void ArtMethod::ResetCounter(uint16_t new_value) {
	if (IsAbstract()) {
	return;
	}
	if (IsMemorySharedMethod()) {
	return;
	}
	DCHECK_EQ(new_value, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
	// Avoid dirtying the value if possible.
	if (hotness_count_ != new_value) {
	hotness_count_ = new_value;
	}
	}

	inline void ArtMethod::SetHotCounter() {
	DCHECK(!IsAbstract());
	// Avoid dirtying the value if possible.
	if (hotness_count_ != 0) {
	hotness_count_ = 0;
	}
	}

	inline void ArtMethod::UpdateCounter(int32_t new_samples) {
	DCHECK(!IsAbstract());
	DCHECK_GT(new_samples, 0);
	DCHECK_LE(new_samples, std::numeric_limits<uint16_t>::max());
	if (IsMemorySharedMethod()) {
	return;
	}
	uint16_t old_hotness_count = hotness_count_;
	uint16_t new_count = (old_hotness_count <= new_samples) ? 0u : old_hotness_count - new_samples;
	// Avoid dirtying the value if possible.
	if (old_hotness_count != new_count) {
	hotness_count_ = new_count;
	}
	}

	inline bool ArtMethod::CounterIsHot() {
	DCHECK(!IsAbstract());
	return hotness_count_ == 0;
	}

	inline bool ArtMethod::CounterHasReached(uint16_t samples, uint16_t threshold) {
	DCHECK(!IsAbstract());
	DCHECK_EQ(threshold, Runtime::Current()->GetJITOptions()->GetWarmupThreshold());
	DCHECK_LE(samples, threshold);
	return hotness_count_ <= (threshold - samples);
	}

	inline uint16_t ArtMethod::GetCounter() {
	DCHECK(!IsAbstract());
	return hotness_count_;
	}

	inline uint32_t ArtMethod::GetImtIndex() {
	if (LIKELY(IsAbstract())) {
	return imt_index_;
	} else {
	return ImTable::GetImtIndex(this);
	}
	}

	inline void ArtMethod::CalculateAndSetImtIndex() {
	DCHECK(IsAbstract()) << PrettyMethod();
	imt_index_ = ImTable::GetImtIndex(this);
	}

	} // namespace art

	#endif // ART_RUNTIME_ART_METHOD_INL_H_