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test-coroutine: add simple CoMutex test 

In preparation for adding a similar test using QemuLockable, add a very
simple testcase that has two interleaved calls to lock and unlock.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20180203153935.8056-2-pbonzini@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2018-02-03 10:39:31 -05:00 committed by Fam Zheng
parent 5b9b49d7bd
commit 439b6e5efc
1 changed files with 48 additions and 2 deletions
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50
tests/test-coroutine.c
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@ -175,7 +175,7 @@ static void coroutine_fn c1_fn(void *opaque)
qemu_coroutine_enter(c2);
}
static void test_co_queue(void)
static void test_no_dangling_access(void)
{
Coroutine *c1;
Coroutine *c2;
@ -195,6 +195,51 @@ static void test_co_queue(void)
*c1 = tmp;
}
static bool locked;
static int done;
static void coroutine_fn mutex_fn(void *opaque)
{
CoMutex *m = opaque;
qemu_co_mutex_lock(m);
assert(!locked);
locked = true;
qemu_coroutine_yield();
locked = false;
qemu_co_mutex_unlock(m);
done++;
}
static void do_test_co_mutex(CoroutineEntry *entry, void *opaque)
{
Coroutine *c1 = qemu_coroutine_create(entry, opaque);
Coroutine *c2 = qemu_coroutine_create(entry, opaque);
done = 0;
qemu_coroutine_enter(c1);
g_assert(locked);
qemu_coroutine_enter(c2);
/* Unlock queues c2. It is then started automatically when c1 yields or
* terminates.
*/
qemu_coroutine_enter(c1);
g_assert_cmpint(done, ==, 1);
g_assert(locked);
qemu_coroutine_enter(c2);
g_assert_cmpint(done, ==, 2);
g_assert(!locked);
}
static void test_co_mutex(void)
{
CoMutex m;
qemu_co_mutex_init(&m);
do_test_co_mutex(mutex_fn, &m);
}
/*
* Check that creation, enter, and return work
*/
@ -422,7 +467,7 @@ int main(int argc, char **argv)
* crash, so skip it.
*/
if (CONFIG_COROUTINE_POOL) {
g_test_add_func("/basic/co_queue", test_co_queue);
g_test_add_func("/basic/no-dangling-access", test_no_dangling_access);
}
g_test_add_func("/basic/lifecycle", test_lifecycle);
@ -432,6 +477,7 @@ int main(int argc, char **argv)
g_test_add_func("/basic/entered", test_entered);
g_test_add_func("/basic/in_coroutine", test_in_coroutine);
g_test_add_func("/basic/order", test_order);
g_test_add_func("/locking/co-mutex", test_co_mutex);
if (g_test_perf()) {
g_test_add_func("/perf/lifecycle", perf_lifecycle);
g_test_add_func("/perf/nesting", perf_nesting);