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Re: PATCH/RFC handle missing DW_AT_comp_dir attribute


Richard Earnshaw <rearnsha@arm.com> writes:
> This problem was found by a colleague while using GDB with the ADS tools.
> 
> These tools do not set the DW_AT_comp_dir attribute in a compilation unit 
> entry, so GDB will crash trying to reference a NULL pointer.
> 
> Regardless of whether ADS is correct not to generate this directive (the 
> Dwarf spec appears not to require it to), GDB should not be falling over 
> in this way.  The following patch fixes the problem:
> 
> <date>  Ian Rickards  <irickard@arm.com>
> 
> 	* dwarf2.c (concat_filename): If we can't establish the directory 
> 	just return the filename.

Sorry --- how does this patch fix a GDB crash?  GDB doesn't use BFD to
read debugging information.


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