Hi Mark,
On Tue, Apr 30, 2024 at 10:39 AM Mark Wielaard <m...@klomp.org> wrote:
>
> This alloca use is inside a lexical block and is used to replace one
> element of argv. Use a function local variable, xmalloc and free to
> make memory usage pattern more clear.
>
> * src/ar.c (main): Move newp char pointer declaration up.
> Use xmalloc to allocate space. free at end of main.
>
> Signed-off-by: Mark Wielaard <m...@klomp.org>
LGTM. This patch shouldn't change anything except possibly help
some static analyzers detect correct memory usage.
Aaron
> ---
> src/ar.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/src/ar.c b/src/ar.c
> index e6d6d58f2b3b..fcb8bfb90a9f 100644
> --- a/src/ar.c
> +++ b/src/ar.c
> @@ -41,6 +41,7 @@
> #include <system.h>
> #include <printversion.h>
>
> +#include "libeu.h"
> #include "arlib.h"
>
>
> @@ -154,10 +155,11 @@ main (int argc, char *argv[])
>
> /* For historical reasons the options in the first parameter need
> not be preceded by a dash. Add it now if necessary. */
> + char *newp = NULL;
> if (argc > 1 && argv[1][0] != '-')
> {
> size_t len = strlen (argv[1]) + 1;
> - char *newp = alloca (len + 1);
> + newp = (char *) xmalloc (len + 1);
> newp[0] = '-';
> memcpy (&newp[1], argv[1], len);
> argv[1] = newp;
> @@ -271,6 +273,8 @@ MEMBER parameter required for 'a', 'b', and 'i'
> modifiers"));
> break;
> }
>
> + free (newp);
> +
> return status;
> }
>
> --
> 2.44.0
>
