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Re: Need help with stack smash

On Thu, 2009-08-27 at 12:36 -0600, Orion Poplawski wrote:
> I'm trying to debug a stack smash in of the hdf test programs but am 
> having a hard time tracking down exactly where the smash happens.  Is 
> there any way to watch the guard variable with gdb to find exactly when 
> it happens?  Something similar?

(gdb) help watch
Set a watchpoint for an expression.
A watchpoint stops execution of your program whenever the value of
an expression changes.

Note that this means what it says: if your expression contains a symbol
that goes out of scope before the change happens, then the watchpoint
will be forgotten, because the value of the expression will change from
being a value to being not-a-thing.  So you would need to set the watch
on the address in memory of what you're trying to watch, and not
necessarily on its symbolic name.

- ajax

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