[PATCH 5/7] bfd/Dwarf2: make find-nearest-line returned function name consistent

[Jan Beulich]

Prior to entering the enclosing "else if()" the earlier associated if()
checks function->is_linkage and, if set, uses function->name. The
comment in patch context precedes (and explains) the setting
function->is_linkage. Yet with the flag set, we should then also return
the function name, just like said earlier if() would do when we came
here a 2nd time for the same "addr". And indeed passing the same address
twice on addr2line's command line would resolve the function for the 2nd
instance, but not for the 1st (if this code path is taken). (This,
obviously, is particularly relevant when there's no ELF symbol table in
the first place, like would be the case - naturally - in PE/COFF
binaries, for example.)

--- a/bfd/dwarf2.c
+++ b/bfd/dwarf2.c
@@ -5264,8 +5264,9 @@ _bfd_dwarf2_find_nearest_line (bfd *abfd
 	  sec_vma = section->vma;
 	  if (section->output_section != NULL)
 	    sec_vma = section->output_section->vma + section->output_offset;
-	  if (fun != NULL
-	      && fun->value + sec_vma == function->arange.low)
+	  if (fun == NULL)
+	    *functionname_ptr = function->name;
+	  else if (fun->value + sec_vma == function->arange.low)
 	    function->name = *functionname_ptr;
 	  /* Even if we didn't find a linkage name, say that we have
 	     to stop a repeated search of symbols.  */