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qtest: Keep list of qtest instances for SIGABRT handler 

Keep track of active qtest instances so we can kill them when the test
aborts.  This ensures no QEMU processes are left running after test
failure.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Stefan Hajnoczi 2014-03-27 15:09:50 +01:00 committed by Andreas Färber
parent 96b8ca47f8
commit d766825190
1 changed files with 37 additions and 10 deletions
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47
tests/libqtest.c
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@ -48,6 +48,9 @@ struct QTestState
struct sigaction sigact_old; /* restored on exit */
};
static GList *qtest_instances;
static struct sigaction sigact_old;
#define g_assert_no_errno(ret) do { \
g_assert_cmpint(ret, !=, -1); \
} while (0)
@ -104,7 +107,28 @@ static void kill_qemu(QTestState *s)
static void sigabrt_handler(int signo)
{
kill_qemu(global_qtest);
GList *elem;
for (elem = qtest_instances; elem; elem = elem->next) {
kill_qemu(elem->data);
}
}
static void setup_sigabrt_handler(void)
{
struct sigaction sigact;
/* Catch SIGABRT to clean up on g_assert() failure */
sigact = (struct sigaction){
.sa_handler = sigabrt_handler,
.sa_flags = SA_RESETHAND,
};
sigemptyset(&sigact.sa_mask);
sigaction(SIGABRT, &sigact, &sigact_old);
}
static void cleanup_sigabrt_handler(void)
{
sigaction(SIGABRT, &sigact_old, NULL);
}
QTestState *qtest_init(const char *extra_args)
@ -115,7 +139,6 @@ QTestState *qtest_init(const char *extra_args)
gchar *qmp_socket_path;
gchar *command;
const char *qemu_binary;
struct sigaction sigact;
qemu_binary = getenv("QTEST_QEMU_BINARY");
g_assert(qemu_binary != NULL);
@ -128,13 +151,12 @@ QTestState *qtest_init(const char *extra_args)
sock = init_socket(socket_path);
qmpsock = init_socket(qmp_socket_path);
/* Catch SIGABRT to clean up on g_assert() failure */
sigact = (struct sigaction){
.sa_handler = sigabrt_handler,
.sa_flags = SA_RESETHAND,
};
sigemptyset(&sigact.sa_mask);
sigaction(SIGABRT, &sigact, &s->sigact_old);
/* Only install SIGABRT handler once */
if (!qtest_instances) {
setup_sigabrt_handler();
}
qtest_instances = g_list_prepend(qtest_instances, s);
s->qemu_pid = fork();
if (s->qemu_pid == 0) {
@ -180,7 +202,12 @@ QTestState *qtest_init(const char *extra_args)
void qtest_quit(QTestState *s)
{
sigaction(SIGABRT, &s->sigact_old, NULL);
/* Uninstall SIGABRT handler on last instance */
if (qtest_instances && !qtest_instances->next) {
cleanup_sigabrt_handler();
}
qtest_instances = g_list_remove(qtest_instances, s);
kill_qemu(s);
close(s->fd);