Re: [PATCH] gdb: Workaround stringop-overread warning in debuginfod-support.c on powerpc64

[Pedro Alves <pedro@palves.net>]

On 2022-05-31 10:05, Mark Wielaard wrote:
> +	  /* g++ 11.2.1 on s390x, g++q 11.3.1 on ppc64le and g++ 11 on
> +	     hppa seem convinced url_view might be of SIZE_MAX length.
> +	     And so complains because the length of an array can only
> +	     be PTRDIFF_MAX.  */

I wonder whether sticking in an assert so that the compiler knows the
size of array, would make the warning go away:

diff --git c/gdb/debuginfod-support.c w/gdb/debuginfod-support.c
index 6dc08fc29b6..d6fab39eac8 100644
--- c/gdb/debuginfod-support.c
+++ w/gdb/debuginfod-support.c
@@ -187,6 +187,8 @@ debuginfod_is_enabled ()
                    "from the following URLs:\n"));
 
       gdb::string_view url_view (urls);
+      gdb_assert (url_view.size () < PTRDIFF_MAX);
+
       while (true)
        {
          size_t off = url_view.find_first_not_of (' ');