Re: [PATCH v2 03/12] libqtest: add qtest_kill_qemu()

[Wainer dos Santos Moschetta]

On 12/7/20 2:20 PM, Stefan Hajnoczi wrote:
> Tests that manage multiple processes may wish to kill QEMU before
> destroying the QTestState. Expose a function to do that.
>
> The vhost-user-blk-test testcase will need this.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>   tests/qtest/libqos/libqtest.h | 11 +++++++++++
>   tests/qtest/libqtest.c        |  7 ++++---
>   2 files changed, 15 insertions(+), 3 deletions(-)


Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>


> diff --git a/tests/qtest/libqos/libqtest.h b/tests/qtest/libqos/libqtest.h
> index e5f1ec590c..51287b9276 100644
> --- a/tests/qtest/libqos/libqtest.h
> +++ b/tests/qtest/libqos/libqtest.h
> @@ -74,6 +74,17 @@ QTestState *qtest_init_without_qmp_handshake(const char 
> *extra_args);
>    */
>   QTestState *qtest_init_with_serial(const char *extra_args, int *sock_fd);
>   
> +/**
> + * qtest_kill_qemu:
> + * @s: #QTestState instance to operate on.
> + *
> + * Kill the QEMU process and wait for it to terminate. It is safe to call this
> + * function multiple times. Normally qtest_quit() is used instead because it
> + * also frees QTestState. Use qtest_kill_qemu() when you just want to kill QEMU
> + * and qtest_quit() will be called later.
> + */
> +void qtest_kill_qemu(QTestState *s);
> +
>   /**
>    * qtest_quit:
>    * @s: #QTestState instance to operate on.
> diff --git a/tests/qtest/libqtest.c b/tests/qtest/libqtest.c
> index bc389d422b..cc2cec4a35 100644
> --- a/tests/qtest/libqtest.c
> +++ b/tests/qtest/libqtest.c
> @@ -133,7 +133,7 @@ void qtest_set_expected_status(QTestState *s, int status)
>       s->expected_status = status;
>   }
>   
> -static void kill_qemu(QTestState *s)
> +void qtest_kill_qemu(QTestState *s)
>   {
>       pid_t pid = s->qemu_pid;
>       int wstatus;
> @@ -143,6 +143,7 @@ static void kill_qemu(QTestState *s)
>           kill(pid, SIGTERM);
>           TFR(pid = waitpid(s->qemu_pid, &s->wstatus, 0));
>           assert(pid == s->qemu_pid);
> +        s->qemu_pid = -1;
>       }
>   
>       /*
> @@ -169,7 +170,7 @@ static void kill_qemu(QTestState *s)
>   
>   static void kill_qemu_hook_func(void *s)
>   {
> -    kill_qemu(s);
> +    qtest_kill_qemu(s);
>   }
>   
>   static void sigabrt_handler(int signo)
> @@ -373,7 +374,7 @@ void qtest_quit(QTestState *s)
>       /* Uninstall SIGABRT handler on last instance */
>       cleanup_sigabrt_handler();
>   
> -    kill_qemu(s);
> +    qtest_kill_qemu(s);
>       close(s->fd);
>       close(s->qmp_fd);
>       g_string_free(s->rx, true);