Call to base constructor

[seesharper]

Hi!

I have this case where I need to inject code in a constructor AFTER
the call to the base constructor.

This is modifying an existing type so I do not have control over
calling the base constructor.

Is there any way I can search through the instructions and detect the
call to the base constructor.

L_0000: ldarg.0
L_0001: call instance void [mscorlib]System.Object::.ctor()
-> Inject code here ........

Is there any generic way I can solve this so I can make sure my code
is injected after the call to the base constructor?

Regards

Bernhard Richter

[Gábor Kozár]

That should be pretty simple. When you're modifying a constructor method, just look for the first instruction after which the evaluation stack is empty. That should be the constructor delegation call.

(Disclaimer: I'm not way an IL expert, so I'm not 100% sure about this, but I'd try it this way.)

2011/12/23 seesharper <bernhard...@gmail.com>

--
--
mono-cecil

[Carlo Kok]

Look for a *call* to a .ctor, there should be only 1. (new is used to
instantiate while call is only used for base/this calls)

--
Carlo Kok
RemObjects Software

[Jb Evain]

On Dec 23, 2011, at 9:31 PM, Carlo Kok wrote:
> Look for a *call* to a .ctor, there should be only 1. (new is used to instantiate while call is only used for base/this calls)

Except when creating structs with a non default ctor ;)

Jb