/// <summary>
/// Create the current type as class definition.
/// </summary>
internal static DelegateInstanceType Create(
ISourceLocation sequencePoint,
AssemblyCompiler compiler,
DexTargetPackage targetPackage,
ClassDefinition delegateClass,
XMethodDefinition invokeMethod,
Prototype invokePrototype,
XMethodDefinition equalsMethod,
Prototype equalsPrototype,
XMethodDefinition calledMethod)
{
// Prepare called method
var target = targetPackage.DexFile;
var owner = target.GetClass(calledMethod.DeclaringType.GetClassReference(targetPackage).Fullname) ??
targetPackage.GetOrCreateGeneratedCodeClass();
var calledMethodPrototype = PrototypeBuilder.BuildPrototype(compiler, targetPackage, owner, calledMethod);
var calledMethodRef = calledMethod.GetReference(targetPackage);
if (calledMethod.DeclaringType.HasDexImportAttribute())
{
// Delegate method is a Dex import method
}
else
{
// Delegate method is a .NET method
var calledDexMethod = owner.Methods.Single(x => (x.Name == calledMethodRef.Name) && (x.Prototype.Equals(calledMethodRef.Prototype)));
if (calledDexMethod.IsPrivate)
{
calledDexMethod.IsPrivate = false;
calledDexMethod.IsProtected = true;
}
}
var @class = new ClassDefinition();
@class.Name = CreateInstanceTypeName(owner);
@class.Namespace = owner.Namespace;
@class.AccessFlags = AccessFlags.Public | AccessFlags.Final;
owner.InnerClasses.Add(@class);
// Set super class
@class.SuperClass = delegateClass;
// Implement delegate interface
//@class.Interfaces.Add(delegateInterface);
// Get type of instance
XTypeDefinition instanceType = calledMethod.DeclaringType;
TypeReference instanceTypeRef = instanceType.GetReference(targetPackage);
// Add instance field
FieldDefinition instanceField = null;
if (!calledMethod.IsStatic)
{
instanceField = new FieldDefinition();
instanceField.Name = "instance";
instanceField.Owner = @class;
instanceField.Type = instanceTypeRef;
instanceField.AccessFlags = AccessFlags.Private | AccessFlags.Final;
@class.Fields.Add(instanceField);
}
// Add ctor
var ctor = new Dot42.DexLib.MethodDefinition();
ctor.Owner = @class;
ctor.Name = "<init>";
ctor.AccessFlags = AccessFlags.Public | AccessFlags.Constructor;
ctor.Prototype = new Prototype(PrimitiveType.Void);
if (!calledMethod.IsStatic)
{
ctor.Prototype.Parameters.Add(new Parameter(instanceTypeRef, "this"));
}
@class.Methods.Add(ctor);
// Create ctor body
var ctorBody = CreateCtorBody(calledMethod, instanceField, delegateClass);
targetPackage.Record(new CompiledMethod() { DexMethod = ctor, RLBody = ctorBody });
// Add Invoke method
var invoke = new Dot42.DexLib.MethodDefinition(@class, "Invoke", invokePrototype) { AccessFlags = AccessFlags.Public };
@class.Methods.Add(invoke);
// Create body
var invokeBody = CreateInvokeBody(sequencePoint, compiler, targetPackage, calledMethod, invokeMethod, invokePrototype, calledMethodPrototype, instanceField, delegateClass);
targetPackage.Record(new CompiledMethod() { DexMethod = invoke, RLBody = invokeBody });
// Add Equals method
if (null != equalsMethod)
{
var equals = new Dot42.DexLib.MethodDefinition(@class, "equals", equalsPrototype) { AccessFlags = AccessFlags.Public };
@class.Methods.Add(equals);
// Create body
if (!calledMethod.IsStatic)
{
var equalsBody = CreateEqualsBody(sequencePoint, compiler, targetPackage, equalsMethod, equalsPrototype, instanceField, @class);
targetPackage.Record(new CompiledMethod() { DexMethod = equals, RLBody = equalsBody });
}
else
{
var equalsBody = CreateEqualsBody();
targetPackage.Record(new CompiledMethod() { DexMethod = equals, RLBody = equalsBody });
}
}
return new DelegateInstanceType(calledMethod, @class, ctor);
}
/// <summary>
/// Create the body of the invoke method.
/// </summary>
private static MethodBody CreateInvokeBody(ISourceLocation sequencePoint, AssemblyCompiler compiler, DexTargetPackage targetPackage, XMethodDefinition calledMethod, XMethodDefinition invokeMethod, Prototype invokePrototype, Prototype calledMethodPrototype, FieldDefinition instanceField, ClassReference delegateClass)
{
var body = new MethodBody(null);
var rthis = body.AllocateRegister(RCategory.Argument, RType.Object);
foreach (var p in invokePrototype.Parameters)
{
if (p.Type.IsWide())
{
body.AllocateWideRegister(RCategory.Argument);
}
else
{
var type = (p.Type is PrimitiveType) ? RType.Value : RType.Object;
body.AllocateRegister(RCategory.Argument, type);
}
}
var incomingMethodArgs = body.Registers.ToArray();
// Create code
var ins = body.Instructions;
Register instance = null;
if (!calledMethod.IsStatic)
{
// load instance
instance = body.AllocateRegister(RCategory.Temp, RType.Object);
ins.Add(new Instruction(RCode.Iget_object, instance, rthis) { Operand = instanceField });
}
// Invoke
var calledMethodRef = calledMethod.GetReference(targetPackage);
var inputArgs = calledMethod.IsStatic ? incomingMethodArgs.Skip(1).ToArray() : incomingMethodArgs;
// Cast arguments (if needed)
var outputArgs = new List<Register>();
if (!calledMethod.IsStatic)
{
outputArgs.Add(instance);
}
var parameterIndex = 0;
for (var i = calledMethod.IsStatic ? 0 : 1; i < inputArgs.Length; )
{
var invokeType = invokePrototype.Parameters[parameterIndex].Type;
var inputIsWide = invokeType.IsWide();
var calledType = calledMethodPrototype.Parameters[parameterIndex].Type;
if (!invokeType.Equals(calledType))
{
// Add cast / unbox
var source = inputIsWide
? new RegisterSpec(inputArgs[i], inputArgs[i + 1], invokeType)
: new RegisterSpec(inputArgs[i], null, invokeType);
var tmp = ins.Unbox(sequencePoint, source, calledMethod.Parameters[parameterIndex].ParameterType, compiler, targetPackage, body);
outputArgs.Add(tmp.Result.Register);
if (calledType.IsWide())
{
outputArgs.Add(tmp.Result.Register2);
}
}
else
{
outputArgs.Add(inputArgs[i]);
if (calledType.IsWide())
{
outputArgs.Add(inputArgs[i + 1]);
}
}
i += inputIsWide ? 2 : 1;
parameterIndex++;
}
// Actual call
ins.Add(new Instruction(calledMethod.Invoke(calledMethod, null), calledMethodRef, outputArgs.ToArray()));
// Collect return value
var invokeReturnType = invokePrototype.ReturnType;
var calledReturnType = calledMethodPrototype.ReturnType;
var needsBoxing = !invokeReturnType.Equals(calledReturnType);
Instruction returnInstruction;
if (calledReturnType.IsWide())
{
var r = body.AllocateWideRegister(RCategory.Temp);
ins.Add(new Instruction(RCode.Move_result_wide, r.Item1));
if (needsBoxing)
{
// Box
var source = new RegisterSpec(r.Item1, r.Item2, calledReturnType);
var tmp = ins.Box(sequencePoint, source, calledMethod.ReturnType, targetPackage, body);
returnInstruction = new Instruction(RCode.Return_object, tmp.Result.Register);
}
else
{
// Return wide
returnInstruction = new Instruction(RCode.Return_wide, r.Item1);
}
}
else if (calledMethod.ReturnType.IsVoid())
{
// Void return
returnInstruction = new Instruction(RCode.Return_void);
}
else if (calledReturnType is PrimitiveType)
{
// Single register return
var r = body.AllocateRegister(RCategory.Temp, RType.Value);
ins.Add(new Instruction(RCode.Move_result, r));
if (needsBoxing)
{
// Box
var source = new RegisterSpec(r, null, invokeReturnType);
var tmp = ins.Box(sequencePoint, source, calledMethod.ReturnType, targetPackage, body);
returnInstruction = new Instruction(RCode.Return_object, tmp.Result.Register);
}
else
{
// Return
returnInstruction = new Instruction(RCode.Return, r);
}
}
else
{
var r = body.AllocateRegister(RCategory.Temp, RType.Object);
ins.Add(new Instruction(RCode.Move_result_object, r));
if (needsBoxing)
{
// Box
var source = new RegisterSpec(r, null, invokeReturnType);
var tmp = ins.Box(sequencePoint, source, invokeMethod.ReturnType, targetPackage, body);
returnInstruction = new Instruction(RCode.Return_object, tmp.Result.Register);
}
else
{
// Return
returnInstruction = new Instruction(RCode.Return_object, r);
}
}
// Call next delegate (if any)
var next = body.AllocateRegister(RCategory.Temp, RType.Object);
var multicastDelegateType = new ClassReference(targetPackage.NameConverter.GetConvertedFullName("System.MulticastDelegate"));
var nextReference = new FieldReference(multicastDelegateType, "next", multicastDelegateType);
ins.Add(new Instruction(RCode.Iget_object, nextReference, new[] { next, rthis })); // load this.next
var afterCallNext = new Instruction(RCode.Nop);
ins.Add(new Instruction(RCode.If_eqz, afterCallNext, new[] { next })); // if next == null, continue
ins.Add(new Instruction(RCode.Check_cast, delegateClass, new[] { next }));
var nextInvokeMethod = new MethodReference(delegateClass, "Invoke", invokePrototype);
var nextInvokeArgs = new[] { next }.Concat(incomingMethodArgs.Skip(1)).ToArray();
ins.Add(new Instruction(RCode.Invoke_virtual, nextInvokeMethod, nextInvokeArgs));
ins.Add(afterCallNext);
// Add return instructions
ins.Add(returnInstruction);
return body;
}