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[6/8] tools/ocaml: libxb: Harden stub_header_of_string()

Message ID 20200330192157.1335-7-julien@xen.org (mailing list archive)
State New, archived
Headers show
Series Fix build with using OCaml 4.06.1 and -safe-string | expand

Commit Message

Julien Grall March 30, 2020, 7:21 p.m. UTC 
From: Julien Grall <jgrall@amazon.com>

stub_header_of_string() should not modify the header. So mark the
variable 'hdr' as const.

Signed-off-by: Julien Grall <jgrall@amazon.com>
---
 tools/ocaml/libs/xb/xenbus_stubs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/ocaml/libs/xb/xenbus_stubs.c b/tools/ocaml/libs/xb/xenbus_stubs.c
index a68e783f70..001bb03371 100644
--- a/tools/ocaml/libs/xb/xenbus_stubs.c
+++ b/tools/ocaml/libs/xb/xenbus_stubs.c
@@ -40,12 +40,12 @@  CAMLprim value stub_header_of_string(value s)
 {
 	CAMLparam1(s);
 	CAMLlocal1(ret);
-	struct xsd_sockmsg *hdr;
+	const struct xsd_sockmsg *hdr;
 
 	if (caml_string_length(s) != sizeof(struct xsd_sockmsg))
 		caml_failwith("xb header incomplete");
 	ret = caml_alloc_tuple(4);
-	hdr = (struct xsd_sockmsg *) String_val(s);
+	hdr = (const struct xsd_sockmsg *) String_val(s);
 	Store_field(ret, 0, Val_int(hdr->tx_id));
 	Store_field(ret, 1, Val_int(hdr->req_id));
 	Store_field(ret, 2, Val_int(hdr->type));