Re: deref/use after free

[Thomas Dickey]

On Fri, 23 Jan 2009, john heasley wrote:

> > valgrind (for Linux) tends to give better information than dmalloc,
> > though it still takes some study to see.
>
> I don't use linux; it'd take some effort to use the box I can access.
> I added a bunch of free(strdup("foo")) calls through the window/resizing
> code to trigger the fencepost checking.  I'll poke some more; thanks
> for your comments/suggestions.

ElectricFence (efence) is reasonably portable.  Before valgrind, I used
to link with efence to force a core dump close to bad memory references.
Since it covers "all" memory references, it's more general than dmalloc.
But you do need a debugger to see where/why the program died.

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net