tests: Clean up around qmp() and hmp()

[Qemu-devel] [PATCH 1/9] qtest: Avoid passing raw strings through hmp()

Posted by Markus Armbruster 8 years, 3 months ago

From: Eric Blake <eblake@redhat.com>

The next patch will add __attribute__((__format__)) to hmp(), which
in turn causes gcc to warn about non-literal format strings.  Rather
than risk an arbitrary string containing % being mis-handled, always
pass variable strings along with a %s format.  It also makes it
easier to prove correctness locally, rather than auditing all the
source strings.

Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20170720214008.28494-4-eblake@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 tests/test-hmp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/test-hmp.c b/tests/test-hmp.c
index d77b3c8..0af0664 100644
--- a/tests/test-hmp.c
+++ b/tests/test-hmp.c
@@ -80,7 +80,7 @@ static void test_commands(void)
         if (verbose) {
             fprintf(stderr, "\t%s\n", hmp_cmds[i]);
         }
-        response = hmp(hmp_cmds[i]);
+        response = hmp("%s", hmp_cmds[i]);
         g_free(response);
     }
 
@@ -103,7 +103,7 @@ static void test_info_commands(void)
         if (verbose) {
             fprintf(stderr, "\t%s\n", info);
         }
-        resp = hmp(info);
+        resp = hmp("%s", info);
         g_free(resp);
         /* And move forward to the next line */
         info = strchr(endp + 1, '\n');
-- 
2.7.5

Re: [Qemu-devel] [PATCH 1/9] qtest: Avoid passing raw strings through hmp()

Posted by Stefan Hajnoczi 8 years, 3 months ago

On Fri, Jul 21, 2017 at 03:53:18PM +0200, Markus Armbruster wrote:
> From: Eric Blake <eblake@redhat.com>
> 
> The next patch will add __attribute__((__format__)) to hmp(), which
> in turn causes gcc to warn about non-literal format strings.  Rather
> than risk an arbitrary string containing % being mis-handled, always
> pass variable strings along with a %s format.  It also makes it
> easier to prove correctness locally, rather than auditing all the
> source strings.
> 
> Signed-off-by: Eric Blake <eblake@redhat.com>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
> Message-Id: <20170720214008.28494-4-eblake@redhat.com>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>
> ---
>  tests/test-hmp.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>