public MutatorParamAttribute(int order, MutatorActionKind actionKind)
{
this.Order = order;
this.ActionKind = actionKind;
}
private ObjPtr PerformAction(MutatorActionKind actionKind, ref LocalCtxFrame frame)
{
ObjPtr ptr;
switch (actionKind)
{
case MutatorActionKind.None:
ptr = ObjPtr.Zero;
break;
case MutatorActionKind.Call:
frame = frame.CreateNext();
ptr = ObjPtr.Zero;
break;
case MutatorActionKind.Return:
frame = frame.ResumePrev();
ptr = ObjPtr.Zero;
break;
case MutatorActionKind.Newobj:
frame.Locals.Add(ptr = _ctx.Runtime.AllocRandomObj(_rnd));
break;
case MutatorActionKind.PutStatic:
{
lock (_ctx.Statics)
{
if (frame.Locals.Count > 0)
{
_ctx.Statics.Add(ptr = frame.Locals.Skip(_rnd.Next(0, frame.Locals.Count)).First());
}
else
{
ptr = ObjPtr.Zero;
}
}
}
break;
case MutatorActionKind.ChangeStatic:
{
lock (_ctx.Statics)
{
if (_ctx.Statics.Count > 0 && frame.Locals.Count > 0)
{
_ctx.Statics.Remove(_ctx.Statics.Skip(_rnd.Next(0, _ctx.Statics.Count)).First());
_ctx.Statics.Add(ptr = frame.Locals.Skip(_rnd.Next(0, frame.Locals.Count)).First());
}
else
{
ptr = ObjPtr.Zero;
}
}
}
break;
case MutatorActionKind.EraseStatic:
{
lock (_ctx.Statics)
{
if (_ctx.Statics.Count > 0)
{
_ctx.Statics.Remove(ptr = _ctx.Statics.Skip(_rnd.Next(0, _ctx.Statics.Count)).First());
}
else
{
ptr = ObjPtr.Zero;
}
}
}
break;
case MutatorActionKind.PutRef:
{
lock (_ctx.Statics)
{
ptr = this.SelectObject(frame);
if (ptr.value != IntPtr.Zero)
{
_refBuffer.Value = _ctx.Runtime.ObjToBlock(this.SelectObject(frame, useStatics: false)).value;
var refs = _ctx.Runtime.GetRefs(ptr);
var field = refs.FirstOrDefault(f => { f.GetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr); return(_refBuffer.Value == IntPtr.Zero); });
if (field != null)
{
field.SetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr);
}
else
{
refs[_rnd.Next(0, refs.Length)].SetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr);
}
}
}
}
break;
case MutatorActionKind.ChangeRef:
{
lock (_ctx.Statics)
{
ptr = this.SelectObject(frame);
if (ptr.value != IntPtr.Zero)
{
_refBuffer.Value = _ctx.Runtime.ObjToBlock(this.SelectObject(frame, useStatics: false)).value;
var refs = _ctx.Runtime.GetRefs(ptr);
refs[_rnd.Next(0, refs.Length)].SetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr);
}
}
}
break;
case MutatorActionKind.EraseRef:
{
lock (_ctx.Statics)
{
ptr = this.SelectObject(frame);
if (ptr.value != IntPtr.Zero)
{
var refs = _ctx.Runtime.GetRefs(ptr);
var field = refs.FirstOrDefault(f => { f.GetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr); return(_refBuffer.Value != IntPtr.Zero); });
_refBuffer.Value = IntPtr.Zero;
if (field != null)
{
field.SetValue(_ctx.Runtime.ObjToBlock(ptr), _refBuffer.buffPtr);
}
}
}
}
break;
default:
throw new NotImplementedException("Unknown action " + actionKind);
}
return(ptr);
}
