[Qemu-devel] [PATCH v2] slirp: Gcc 9 -O3 fix

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Gcc 9 needs some convincing that sopreprbuf really is going to fill
in iov in the call from soreadbuf, even though the failure case
shouldn't happen.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 slirp/src/socket.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/slirp/src/socket.c b/slirp/src/socket.c
index 4a3c935e25..beb8517f1c 100644
--- a/slirp/src/socket.c
+++ b/slirp/src/socket.c
@@ -181,7 +181,7 @@ soread(struct socket *so)
 	 * No need to check if there's enough room to read.
 	 * soread wouldn't have been called if there weren't
 	 */
-	sopreprbuf(so, iov, &n);
+	assert(sopreprbuf(so, iov, &n) != 0);
 
 	nn = recv(so->s, iov[0].iov_base, iov[0].iov_len,0);
 	if (nn <= 0) {
@@ -257,6 +257,7 @@ int soreadbuf(struct socket *so, const char *buf, int size)
 	 * No need to check if there's enough room to read.
 	 * soread wouldn't have been called if there weren't
 	 */
+	assert(size > 0);
 	if (sopreprbuf(so, iov, &n) < size)
         goto err;
 
-- 
2.21.0