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Date: Wed, 28 Sep 2011 22:43:00 -0000
From: S Boucher <stbya@yahoo.com>
Reply-To: S Boucher <stbya@yahoo.com>
Subject: gdb python pretty printer question
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I'm trying to use the python pretty printer functionality to to print what =
are basically sub classes implemented in C.


given the following:

struct base {
=A0int type; /* 1 for S1, 2 for S2, 0 otherwise */

int x,y,z;
}

stuct S1 {
=A0struct base b;
=A0int w;
}

struct S2 {
struct base b;
int q;

}

If the pretty printer lookup notices a type 'struct base' with it's type =
=3D=3D 1, then use a custom S1Printer class.

class S1Printer(object):
=A0 ....

=A0=A0=A0 def to_string(self):
=A0=A0=A0=A0=A0=A0=A0=A0 v =3D self.val.cast(gdb.lookup_type("S1"))
=A0=A0=A0=A0=A0=A0=A0 return v.__str__()


Problem with that is that when v.__str__() is called to print 'b' from S1, =
it notices that b is a S1, and we have a recursion...

Any way to prevent the recursion?