Commit 5aca0fc1 authored by Simon McVittie's avatar Simon McVittie

test-utils-glib: Try to emit TAP diagnostics before aborting

We can't use normal I/O in a signal handler, so resort to write().

"Bail out!" is a special syntactic token in TAP. If I artifically force
the tests to time out by reducing timeouts and increasing the number of
operations, I get results like this:

ERROR: test-sd-activation - Bail out! Test timed out (GLib main loop timeout callback reached)
ERROR: test-refs - Bail out! Test timed out (SIGALRM received)

which is a lot easier to understand than "Not enough tests run" or
"nonzero exit status". The differing output is because test-sd-activation
iterates the main loop, whereas test-refs just blocks (it is joining a
series of worker threads, each of which is spamming refcount operations).

Bug: Philip Withnall's avatarPhilip Withnall <>
[smcv: Use STDOUT_FILENO as per Philip's review]
Signed-off-by: Simon McVittie's avatarSimon McVittie <>
parent 1330bd2c
......@@ -459,7 +459,9 @@ test_kill_pid (GPid pid)
static gboolean
time_out (gpointer data)
g_error ("timed out");
puts ("Bail out! Test timed out (GLib main loop timeout callback reached)");
fflush (stdout);
abort ();
return FALSE;
......@@ -469,6 +471,16 @@ static void wrap_abort (int signal) _DBUS_GNUC_NORETURN;
static void
wrap_abort (int signal)
/* We might be halfway through writing out something else, so force this
* onto its own line */
const char message [] = "\nBail out! Test timed out (SIGALRM received)\n";
if (write (STDOUT_FILENO, message, sizeof (message) - 1) <
(ssize_t) sizeof (message) - 1)
/* ignore short write - what would we do about it? */
abort ();
......@@ -490,7 +502,7 @@ test_init (int *argcp, char ***argvp)
* test). Die with SIGALRM shortly after if necessary. */
alarm (TIMEOUT + 10);
/* Get a core dump from the SIGALRM. */
/* Get a log message and a core dump from the SIGALRM. */
struct sigaction act = { };
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment