🚀 go-pugleaf

>I am designing a program that has two processes share memory,
>I am checking to see if one process has written into memory
>by looking at a pointer in a process controlled by gdb, when I stop
>at a breakpoint and give the command
>
>(gdb)display *data
>
>It responds with 
>(gdb) data = <unknown struct>
>
>Does anyone out there know why it might be happening
>
>I am using gdb 2.3.3 and gdb 4.7
            ^^^
            g++ I assume
 

I've also been getting this, but only under case (A):

(A)

    typedef struct Foo Foo;
    struct Foo
      {
        int a;
      };

    Foo *foo;

    (gdb) print *foo

    [<unknown struct>]

(B)

    typedef struct Foo 
        {
          int a;
        }
      Foo;

    Foo *foo;

    (gdb) print *foo

    [works, I believe]

(C)

    struct Foo
      {
        int a;
      };
    typedef struct Foo Foo;

    Foo *foo;

    (gdb) print *foo

    [works, I believe]

(D)

    typedef struct Foo Foo;
    struct Foo
      {
        int a;
      };
    typedef Foo Bar;	// Bar is not used anywhere

    Foo *foo;

    (gdb) print *foo

    [works, which is pretty weird]


Actually I think I noticed this with g++ 2.3.2, but I think it is still
broken with g++ 2.3.3.  Also, I'm going by memory right now, so I may have
something wrong.  I'm pretty sure about the weird workaround, though.

robt
--
Robert Mollitor						      robert@visix.com
Visix Software Inc.					...!uupsi!visix!robert