[PATCH][gdb] Fix gdb.dwarf2/varval.exp with -fPIE/-pie

Kevin Buettner kevinb@redhat.com
Thu Aug 8 18:04:00 GMT 2019


On Thu, 08 Aug 2019 11:16:44 -0600
Tom Tromey <tom@tromey.com> wrote:

> >>>>> "Tom" == Tom de Vries <tdevries@suse.de> writes:  
> 
> Thanks for the patch.
> 
> Tom> +      CORE_ADDR baseaddr
> Tom> +	= ANOFFSET (objfile->section_offsets, SECT_OFF_TEXT (objfile));
> Tom> +      struct gdbarch *gdbarch = get_objfile_arch (objfile);  
>  
> Tom>        for (const auto &cand_off
> Tom>  	     : dwarf2_per_objfile->abstract_to_concrete[die->sect_off])
> Tom> @@ -23220,6 +23223,8 @@ dwarf2_fetch_die_loc_sect_off (sect_offset sect_off,  
>  
> Tom>  	  CORE_ADDR pc_low, pc_high;
> Tom>  	  get_scope_pc_bounds (cand->parent, &pc_low, &pc_high, cu);
> Tom> +	  pc_low = gdbarch_adjust_dwarf2_addr (gdbarch, pc_low + baseaddr);
> Tom> +	  pc_high = gdbarch_adjust_dwarf2_addr (gdbarch, pc_high + baseaddr);
> Tom>  	  if (pc_low == ((CORE_ADDR) -1)  
> 
> I think this test has to precede the offsetting.

Yes, I agree.

It appears to me that the test / continue in its entirety...

	  if (pc_low == ((CORE_ADDR) -1)
	      || !(pc_low <= pc && pc < pc_high))
	    continue;

...will need to be split with the -1 part being performed before the
pc_low/pc_high adjustment and the other part being performed after.

Kevin



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