Juno

A Windows managed method detouring library that supports both x86 and x64 detours.

Installation

• Download and install Juno using NuGet

Usage

The example below describes a basic implementation of the library

using Juno;

public class TestClass1
{
    public void TestMethod1()
    {
        Console.WriteLine("Original method called");
    }
}

public class TestClass2
{
    public void TestMethod2()
    {
        Console.WriteLine("Detoured method called");
    }
}

var detour = new MethodDetour<TestClass1, TestClass2>("TestMethod1", "TestMethod2");

var testClass = new TestClass1();

// Calls the original method as expected

testClass.TestMethod1();

// Add the method detour

detour.InitialiseDetour();

// Calls the target (detoured) method (TestClass2.TestMethod2)

testClass.TestMethod1();

// Remove the method detour

detour.RemoveDetour();

// Calls the original method

testClass.TestMethod1;

Overloads

In lieu of providing a set of classes and method names, you can provide a set of MethodInfo datatypes.

var detour = new MethodDetour(MethodInfo1, MethodInfo2);

Caveats

• Both original and detoured classes must have the same layout of instance variables if you wish to access them.

• Both original and detoured methods cannot be inlined be the compiler.

• Detoured methods must match the method signature of the original method (same parameters & return type.)

Contributing

Pull requests are welcome.

For large changes, please open an issue first to discuss what you would like to contribute.