From: Markus Armbruster <armbru@redhat.com>

qtest_qmp() & friends pass their format string and variable arguments
to qobject_from_jsonv().  Unlike qobject_from_jsonv(), they aren't
decorated with GCC_FMT_ATTR().  Fix that to get compile-time format
string checking.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1500645206-13559-10-git-send-email-armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 tests/libqtest.h | 32 +++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/tests/libqtest.h b/tests/libqtest.h
index 26930fed4d..7e1bd474aa 100644
--- a/tests/libqtest.h
+++ b/tests/libqtest.h
@@ -55,7 +55,8 @@ void qtest_quit(QTestState *s);
  *
  * Sends a QMP message to QEMU and consumes the response.
  */
-void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...);
+void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...)
+    GCC_FMT_ATTR(2, 3);

 /**
  * qtest_qmp:
@@ -65,7 +66,8 @@ void qtest_qmp_discard_response(QTestState *s, const char *fmt, ...);
  *
  * Sends a QMP message to QEMU and returns the response.
  */
-QDict *qtest_qmp(QTestState *s, const char *fmt, ...);
+QDict *qtest_qmp(QTestState *s, const char *fmt, ...)
+    GCC_FMT_ATTR(2, 3);

 /**
  * qtest_qmp_cmd:
@@ -86,7 +88,8 @@ QDict *qtest_qmp_cmd(QTestState *s, const char *cmd, QObject *args);
  *
  * Sends a QMP message to QEMU and leaves the response in the stream.
  */
-void qtest_async_qmp(QTestState *s, const char *fmt, ...);
+void qtest_async_qmp(QTestState *s, const char *fmt, ...)
+    GCC_FMT_ATTR(2, 3);

 /**
  * qtest_qmpv_discard_response:
@@ -97,7 +100,8 @@ void qtest_async_qmp(QTestState *s, const char *fmt, ...);
  *
  * Sends a QMP message to QEMU and consumes the response.
  */
-void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap);
+void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap)
+    GCC_FMT_ATTR(2, 0);

 /**
  * qtest_qmpv:
@@ -108,7 +112,8 @@ void qtest_qmpv_discard_response(QTestState *s, const char *fmt, va_list ap);
  *
  * Sends a QMP message to QEMU and returns the response.
  */
-QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap);
+QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap)
+    GCC_FMT_ATTR(2, 0);

 /**
  * qtest_async_qmpv:
@@ -119,7 +124,8 @@ QDict *qtest_qmpv(QTestState *s, const char *fmt, va_list ap);
  *
  * Sends a QMP message to QEMU and leaves the response in the stream.
  */
-void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap);
+void qtest_async_qmpv(QTestState *s, const char *fmt, va_list ap)
+    GCC_FMT_ATTR(2, 0);

 /**
  * qtest_receive:
@@ -558,7 +564,7 @@ static inline void qtest_end(void)
  *
  * Sends a QMP message to QEMU and returns the response.
  */
-QDict *qmp(const char *fmt, ...);
+QDict *qmp(const char *fmt, ...) GCC_FMT_ATTR(1, 2);

 /**
  * qmp_cmd:
@@ -577,7 +583,7 @@ QDict *qmp_cmd(const char *cmd, QObject *args);
  *
  * Sends a QMP message to QEMU and leaves the response in the stream.
  */
-void qmp_async(const char *fmt, ...);
+void qmp_async(const char *fmt, ...) GCC_FMT_ATTR(1, 2);

 /**
  * qmp_discard_response:
@@ -586,7 +592,7 @@ void qmp_async(const char *fmt, ...);
  *
  * Sends a QMP message to QEMU and consumes the response.
  */
-void qmp_discard_response(const char *fmt, ...);
+void qmp_discard_response(const char *fmt, ...) GCC_FMT_ATTR(1, 2);

 /**
  * qmp_cmd_discard_response:
@@ -955,10 +961,10 @@ static inline int64_t clock_set(int64_t val)
 }

 QDict *qmp_fd_receive(int fd);
-void qmp_fd_sendv(int fd, const char *fmt, va_list ap);
-void qmp_fd_send(int fd, const char *fmt, ...);
-QDict *qmp_fdv(int fd, const char *fmt, va_list ap);
-QDict *qmp_fd(int fd, const char *fmt, ...);
+void qmp_fd_sendv(int fd, const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
+void qmp_fd_send(int fd, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
+QDict *qmp_fdv(int fd, const char *fmt, va_list ap) GCC_FMT_ATTR(2, 0);
+QDict *qmp_fd(int fd, const char *fmt, ...) GCC_FMT_ATTR(2, 3);

 /**
  * qtest_cb_for_every_machine:
-- 
2.13.3