static int resume_coproc (flux_msg_handler_t *w)
{
struct dispatch *d = w->d;
int coproc_rc, rc = -1;
d->current = w;
if (coproc_resume (w->coproc) < 0)
goto done;
if (!coproc_returned (w->coproc, &coproc_rc)) {
rc = 0;
goto done;
}
if (backlog_flush (w) < 0)
goto done;
rc = coproc_rc;
done:
d->current = NULL;
return rc;
}
int main (int argc, char *argv[])
{
coproc_t *c;
int i;
int rc;
plan (29);
ok ((c = coproc_create (foo_cb)) != NULL,
"coproc_create works");
i = 0;
rc = -1;
ok (coproc_start (c, &i) == 0,
"coproc_start works");
ok (coproc_returned (c, &rc),
"coproc returned");
cmp_ok (rc, "==", 0,
"rc is set to coproc return value");
i = 2;
rc = -1;
ok (coproc_start (c, &i) == 0,
"coproc_start works");
ok (!coproc_returned (c, NULL),
"coproc did not return (yielded)");
ok (coproc_resume (c) == 0,
"coproc_resume works");
ok (!coproc_returned (c, NULL),
"coproc did not return (yielded)");
ok (coproc_resume (c) == 0,
"coproc_resume works");
ok (coproc_returned (c, &rc),
"coproc returned");
cmp_ok (rc, "==", 0,
"rc is set to coproc return value");
errno = 0;
ok (coproc_resume (c) < 0 && errno == EINVAL,
"coproc_resume on returned coproc fails with EINVAL");
coproc_destroy (c);
pthread_t t;
ok (pthread_create (&t, NULL, threadmain, NULL) == 0,
"pthread_create OK");
ok (pthread_join (t, NULL) == 0,
"pthread_join OK");
coproc_t *cps[10000];
for (i = 0; i < 10000; i++) {
if (!(cps[i] = coproc_create (bar_cb)))
break;
if (coproc_start (cps[i], NULL) < 0 || coproc_returned (cps[i], NULL))
break;
}
ok (i == 10000,
"started 10000 coprocs that yielded");
for (i = 0; i < 10000; i++) {
if (coproc_resume (cps[i]) < 0 || coproc_returned (cps[i], NULL))
break;
}
ok (i == 10000,
"resumed 10000 coprocs that yielded");
death = true;
for (i = 0; i < 10000; i++) {
if (coproc_resume (cps[i]) < 0 || !coproc_returned (cps[i], &rc)
|| rc != 0)
break;
}
ok (i == 10000,
"resumed 10000 coprocs that exited with rc=0");
for (i = 0; i < 10000; i++)
coproc_destroy (cps[i]);
/* Test stack guard page(s)
*/
ok (signal_setup () == 0,
"installed SIGSEGV handler with sigaltstack");
ok ((co = coproc_create (stack_cb)) != NULL,
"coproc_create works");
size_t ssize = coproc_get_stacksize (co);
ok (ssize > 0,
"coproc_get_stacksize returned %d", ssize);
/* We can't use all of the stack and get away with it.
* FIXME: it is unclear why this number must be so large.
* I found it experimentally; maybe it is non-portable and that
* will make this test fragile?
*/
//const size_t stack_reserve = 2560; // XXX 2540 is too small
const size_t stack_reserve = 3000;
/* should be OK */
ssize -= stack_reserve;
ok (coproc_start (co, &ssize) == 0,
"coproc_start works");
rc = -1;
ok (coproc_returned (co, &rc) && rc == 0,
"coproc successfully scribbled on stack");
/* should fail */
ssize += stack_reserve + 8;
ok (coproc_start (co, &ssize) == 0,
"coproc_start works");
ok (!coproc_returned (co, NULL),
"coproc scribbled on guard page and segfaulted");
done_testing ();
}