[PATCH] Do not pass NULL for the string in catch_errors

[Pedro Alves]

On 09/09/2015 03:45 PM, Luis Machado wrote:
> I caught a segmentation fault while running gdb.reverse/sigall-reverse.exp,
> in a mingw32 GDB, in this code path. It boils down to the code trying to
> strlen () a NULL pointer. I tracked things down and it looks like
> record_full_message_wrapper_safe is the only occurrence.
> 
> We could also change catch_errors to check the char pointer and pass the
> empty string automatically if the pointer is NULL. Then again, it seems like
> catch_errors is going away at any time now, being potentially replaced
> with catch_exceptions.

It's been marked superseded for years.  If you had fixed this by
converting this one instance, we'd be a little closer.  ;-)

> 
> For now, though, the attach fix seems to accomplish the job.
> 
> Does that look reasonable?
> 
> gdb/ChangeLog:
> 
> 2015-09-09  Luis Machado  <lgustavo@codesourcery.com>
> 
> 	* record-full.c (record_full_message_wrapper_safe): Do not pass
> 	NULL to string parameter in catch_errors.

Sure.  OK.

Thanks,
Pedro Alves