private static IntPtr GetDynamicMethodAddress(MethodBase method)
{
unsafe
{
var handle = GetDynamicMethodRuntimeHandle(method);
var ptr = (byte *)handle.Value.ToPointer();
if (IsNet20Sp2OrGreater())
{
RuntimeHelpers.PrepareMethod(handle);
return(handle.GetFunctionPointer());
}
else
{
if (IntPtr.Size == 8)
{
var address = (ulong *)ptr;
address = (ulong *)*(address + 5);
return(new IntPtr(address + 12));
}
else
{
var address = (uint *)ptr;
address = (uint *)*(address + 5);
return(new IntPtr(address + 12));
}
}
}
}
/// <summary>
/// Gets the address of the method stub
/// </summary>
/// <param name="method">The method handle.</param>
/// <returns></returns>
public static IntPtr GetMethodAddress(MethodBase method)
{
if ((method is DynamicMethod))
{
return(GetDynamicMethodAddress(method));
}
// Prepare the method so it gets jited
RuntimeHelpers.PrepareMethod(method.MethodHandle);
return(method.MethodHandle.GetFunctionPointer());
}
private static IntPtr GetDynamicMethodAddress(MethodBase method)
{
unsafe
{
RuntimeMethodHandle handle = GetDynamicMethodRuntimeHandle(method);
byte *ptr = (byte *)handle.Value.ToPointer();
if (IsNet20Sp2OrGreater())
{
RuntimeHelpers.PrepareMethod(handle);
return(handle.GetFunctionPointer());
//if (IntPtr.Size == 8)
//{
// ulong* address = (ulong*)ptr;
// address = (ulong*)*(address + 5);
// return new IntPtr(address + 12);
//}
//else
//{
// uint* address = (uint*)ptr;
// address = (uint*)*(address + 5);
// return new IntPtr(address + 12);
//}
}
else
{
if (IntPtr.Size == 8)
{
ulong *address = (ulong *)ptr;
address += 6;
return(new IntPtr(address));
}
else
{
uint *address = (uint *)ptr;
address += 6;
return(new IntPtr(address));
}
}
}
}
/// <summary>
/// Gets the address of the method stub
/// </summary>
/// <param name="method">The method handle.</param>
/// <returns></returns>
public static IntPtr GetMethodAddress(MethodBase method)
{
if ((method is DynamicMethod))
{
return(GetDynamicMethodAddress(method));
}
// Prepare the method so it gets jited
RuntimeHelpers.PrepareMethod(method.MethodHandle);
// If 3.5 sp1 or greater than we have a different layout in memory.
if (IsNet20Sp2OrGreater())
{
return(GetMethodAddress20SP2(method));
}
unsafe
{
// Skip these
const int skip = 10;
// Read the method index.
var location = (UInt64 *)(method.MethodHandle.Value.ToPointer());
var index = (int)(((*location) >> 32) & 0xFF);
if (IntPtr.Size == 8)
{
// Get the method table
var classStart = (ulong *)method.DeclaringType.TypeHandle.Value.ToPointer();
var address = classStart + index + skip;
return(new IntPtr(address));
}
else
{
// Get the method table
uint *classStart = (uint *)method.DeclaringType.TypeHandle.Value.ToPointer();
uint *address = classStart + index + skip;
return(new IntPtr(address));
}
}
}
