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qemu-e2k/tests/unit/test-aio.c
Stefan Hajnoczi b3496d129b tests: remove aio_context_acquire() tests 
The aio_context_acquire() API is being removed. Drop the test case that
calls the API.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231205182011.1976568-4-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-12-21 22:49:27 +01:00

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/*
* AioContext tests
*
* Copyright Red Hat, Inc. 2012
*
* Authors:
* Paolo Bonzini <pbonzini@redhat.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2 or later.
* See the COPYING.LIB file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "block/aio.h"
#include "qapi/error.h"
#include "qemu/timer.h"
#include "qemu/sockets.h"
#include "qemu/error-report.h"
#include "qemu/coroutine-core.h"
#include "qemu/main-loop.h"
static AioContext *ctx;
typedef struct {
EventNotifier e;
int n;
int active;
bool auto_set;
} EventNotifierTestData;
/* Wait until event notifier becomes inactive */
static void wait_until_inactive(EventNotifierTestData *data)
{
while (data->active > 0) {
aio_poll(ctx, true);
}
}
/* Simple callbacks for testing. */
typedef struct {
QEMUBH *bh;
int n;
int max;
} BHTestData;
typedef struct {
QEMUTimer timer;
QEMUClockType clock_type;
int n;
int max;
int64_t ns;
AioContext *ctx;
} TimerTestData;
static void bh_test_cb(void *opaque)
{
BHTestData *data = opaque;
if (++data->n < data->max) {
qemu_bh_schedule(data->bh);
}
}
static void timer_test_cb(void *opaque)
{
TimerTestData *data = opaque;
if (++data->n < data->max) {
timer_mod(&data->timer,
qemu_clock_get_ns(data->clock_type) + data->ns);
}
}
static void dummy_io_handler_read(EventNotifier *e)
{
}
static void bh_delete_cb(void *opaque)
{
BHTestData *data = opaque;
if (++data->n < data->max) {
qemu_bh_schedule(data->bh);
} else {
qemu_bh_delete(data->bh);
data->bh = NULL;
}
}
static void event_ready_cb(EventNotifier *e)
{
EventNotifierTestData *data = container_of(e, EventNotifierTestData, e);
g_assert(event_notifier_test_and_clear(e));
data->n++;
if (data->active > 0) {
data->active--;
}
if (data->auto_set && data->active) {
event_notifier_set(e);
}
}
/* Tests using aio_*. */
static void set_event_notifier(AioContext *nctx, EventNotifier *notifier,
EventNotifierHandler *handler)
{
aio_set_event_notifier(nctx, notifier, handler, NULL, NULL);
}
static void test_bh_schedule(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 1);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
qemu_bh_delete(data.bh);
}
static void test_bh_schedule10(void)
{
BHTestData data = { .n = 0, .max = 10 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 2);
while (data.n < 10) {
aio_poll(ctx, true);
}
g_assert_cmpint(data.n, ==, 10);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 10);
qemu_bh_delete(data.bh);
}
static void test_bh_cancel(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
qemu_bh_cancel(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
qemu_bh_delete(data.bh);
}
static void test_bh_delete(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
qemu_bh_delete(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
}
static void test_bh_delete_from_cb(void)
{
BHTestData data1 = { .n = 0, .max = 1 };
data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
qemu_bh_schedule(data1.bh);
g_assert_cmpint(data1.n, ==, 0);
while (data1.n < data1.max) {
aio_poll(ctx, true);
}
g_assert_cmpint(data1.n, ==, data1.max);
g_assert(data1.bh == NULL);
g_assert(!aio_poll(ctx, false));
}
static void test_bh_delete_from_cb_many(void)
{
BHTestData data1 = { .n = 0, .max = 1 };
BHTestData data2 = { .n = 0, .max = 3 };
BHTestData data3 = { .n = 0, .max = 2 };
BHTestData data4 = { .n = 0, .max = 4 };
data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
qemu_bh_schedule(data1.bh);
qemu_bh_schedule(data2.bh);
qemu_bh_schedule(data3.bh);
qemu_bh_schedule(data4.bh);
g_assert_cmpint(data1.n, ==, 0);
g_assert_cmpint(data2.n, ==, 0);
g_assert_cmpint(data3.n, ==, 0);
g_assert_cmpint(data4.n, ==, 0);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data1.n, ==, 1);
g_assert_cmpint(data2.n, ==, 1);
g_assert_cmpint(data3.n, ==, 1);
g_assert_cmpint(data4.n, ==, 1);
g_assert(data1.bh == NULL);
while (data1.n < data1.max ||
data2.n < data2.max ||
data3.n < data3.max ||
data4.n < data4.max) {
aio_poll(ctx, true);
}
g_assert_cmpint(data1.n, ==, data1.max);
g_assert_cmpint(data2.n, ==, data2.max);
g_assert_cmpint(data3.n, ==, data3.max);
g_assert_cmpint(data4.n, ==, data4.max);
g_assert(data1.bh == NULL);
g_assert(data2.bh == NULL);
g_assert(data3.bh == NULL);
g_assert(data4.bh == NULL);
}
static void test_bh_flush(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 1);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
qemu_bh_delete(data.bh);
}
static void test_set_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 0 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
event_notifier_cleanup(&data.e);
}
static void test_wait_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 1);
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
event_notifier_cleanup(&data.e);
}
static void test_flush_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 10);
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 9);
g_assert(aio_poll(ctx, false));
wait_until_inactive(&data);
g_assert_cmpint(data.n, ==, 10);
g_assert_cmpint(data.active, ==, 0);
g_assert(!aio_poll(ctx, false));
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
event_notifier_cleanup(&data.e);
}
static void test_wait_event_notifier_noflush(void)
{
EventNotifierTestData data = { .n = 0 };
EventNotifierTestData dummy = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
/* Until there is an active descriptor, aio_poll may or may not call
* event_ready_cb. Still, it must not block. */
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, true));
data.n = 0;
/* An active event notifier forces aio_poll to look at EventNotifiers. */
event_notifier_init(&dummy.e, false);
set_event_notifier(ctx, &dummy.e, event_ready_cb);
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
event_notifier_set(&data.e);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
event_notifier_set(&dummy.e);
wait_until_inactive(&dummy);
g_assert_cmpint(data.n, ==, 2);
g_assert_cmpint(dummy.n, ==, 1);
g_assert_cmpint(dummy.active, ==, 0);
set_event_notifier(ctx, &dummy.e, NULL);
event_notifier_cleanup(&dummy.e);
set_event_notifier(ctx, &data.e, NULL);
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
event_notifier_cleanup(&data.e);
}
static void test_timer_schedule(void)
{
TimerTestData data = { .n = 0, .ctx = ctx, .ns = SCALE_MS * 750LL,
.max = 2,
.clock_type = QEMU_CLOCK_REALTIME };
EventNotifier e;
/* aio_poll will not block to wait for timers to complete unless it has
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
event_notifier_init(&e, false);
set_event_notifier(ctx, &e, dummy_io_handler_read);
aio_poll(ctx, false);
aio_timer_init(ctx, &data.timer, data.clock_type,
SCALE_NS, timer_test_cb, &data);
timer_mod(&data.timer,
qemu_clock_get_ns(data.clock_type) +
data.ns);
g_assert_cmpint(data.n, ==, 0);
/* timer_mod may well cause an event notifier to have gone off,
* so clear that
*/
do {} while (aio_poll(ctx, false));
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 0);
g_usleep(1 * G_USEC_PER_SEC);
g_assert_cmpint(data.n, ==, 0);
g_assert(aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
/* timer_mod called by our callback */
do {} while (aio_poll(ctx, false));
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 1);
g_assert(aio_poll(ctx, true));
g_assert_cmpint(data.n, ==, 2);
/* As max is now 2, an event notifier should not have gone off */
g_assert(!aio_poll(ctx, false));
g_assert_cmpint(data.n, ==, 2);
set_event_notifier(ctx, &e, NULL);
event_notifier_cleanup(&e);
timer_del(&data.timer);
}
/* Now the same tests, using the context as a GSource. They are
* very similar to the ones above, with g_main_context_iteration
* replacing aio_poll. However:
* - sometimes both the AioContext and the glib main loop wake
* themselves up. Hence, some "g_assert(!aio_poll(ctx, false));"
* are replaced by "while (g_main_context_iteration(NULL, false));".
* - there is no exact replacement for a blocking wait.
* "while (g_main_context_iteration(NULL, true)" seems to work,
* but it is not documented _why_ it works. For these tests a
* non-blocking loop like "while (g_main_context_iteration(NULL, false)"
* works well, and that's what I am using.
*/
static void test_source_flush(void)
{
g_assert(!g_main_context_iteration(NULL, false));
aio_notify(ctx);
while (g_main_context_iteration(NULL, false));
g_assert(!g_main_context_iteration(NULL, false));
}
static void test_source_bh_schedule(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(g_main_context_iteration(NULL, true));
g_assert_cmpint(data.n, ==, 1);
g_assert(!g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
qemu_bh_delete(data.bh);
}
static void test_source_bh_schedule10(void)
{
BHTestData data = { .n = 0, .max = 10 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
g_assert(g_main_context_iteration(NULL, true));
g_assert_cmpint(data.n, ==, 2);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 10);
g_assert(!g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 10);
qemu_bh_delete(data.bh);
}
static void test_source_bh_cancel(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
qemu_bh_cancel(data.bh);
g_assert_cmpint(data.n, ==, 0);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
qemu_bh_delete(data.bh);
}
static void test_source_bh_delete(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
qemu_bh_delete(data.bh);
g_assert_cmpint(data.n, ==, 0);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
}
static void test_source_bh_delete_from_cb(void)
{
BHTestData data1 = { .n = 0, .max = 1 };
data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
qemu_bh_schedule(data1.bh);
g_assert_cmpint(data1.n, ==, 0);
g_main_context_iteration(NULL, true);
g_assert_cmpint(data1.n, ==, data1.max);
g_assert(data1.bh == NULL);
assert(g_main_context_iteration(NULL, false));
assert(!g_main_context_iteration(NULL, false));
}
static void test_source_bh_delete_from_cb_many(void)
{
BHTestData data1 = { .n = 0, .max = 1 };
BHTestData data2 = { .n = 0, .max = 3 };
BHTestData data3 = { .n = 0, .max = 2 };
BHTestData data4 = { .n = 0, .max = 4 };
data1.bh = aio_bh_new(ctx, bh_delete_cb, &data1);
data2.bh = aio_bh_new(ctx, bh_delete_cb, &data2);
data3.bh = aio_bh_new(ctx, bh_delete_cb, &data3);
data4.bh = aio_bh_new(ctx, bh_delete_cb, &data4);
qemu_bh_schedule(data1.bh);
qemu_bh_schedule(data2.bh);
qemu_bh_schedule(data3.bh);
qemu_bh_schedule(data4.bh);
g_assert_cmpint(data1.n, ==, 0);
g_assert_cmpint(data2.n, ==, 0);
g_assert_cmpint(data3.n, ==, 0);
g_assert_cmpint(data4.n, ==, 0);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data1.n, ==, 1);
g_assert_cmpint(data2.n, ==, 1);
g_assert_cmpint(data3.n, ==, 1);
g_assert_cmpint(data4.n, ==, 1);
g_assert(data1.bh == NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data1.n, ==, data1.max);
g_assert_cmpint(data2.n, ==, data2.max);
g_assert_cmpint(data3.n, ==, data3.max);
g_assert_cmpint(data4.n, ==, data4.max);
g_assert(data1.bh == NULL);
g_assert(data2.bh == NULL);
g_assert(data3.bh == NULL);
g_assert(data4.bh == NULL);
}
static void test_source_bh_flush(void)
{
BHTestData data = { .n = 0 };
data.bh = aio_bh_new(ctx, bh_test_cb, &data);
qemu_bh_schedule(data.bh);
g_assert_cmpint(data.n, ==, 0);
g_assert(g_main_context_iteration(NULL, true));
g_assert_cmpint(data.n, ==, 1);
g_assert(!g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
qemu_bh_delete(data.bh);
}
static void test_source_set_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 0 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
event_notifier_cleanup(&data.e);
}
static void test_source_wait_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 1);
event_notifier_set(&data.e);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 0);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
event_notifier_cleanup(&data.e);
}
static void test_source_flush_event_notifier(void)
{
EventNotifierTestData data = { .n = 0, .active = 10, .auto_set = true };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
g_assert_cmpint(data.active, ==, 10);
event_notifier_set(&data.e);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
g_assert_cmpint(data.active, ==, 9);
g_assert(g_main_context_iteration(NULL, false));
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 10);
g_assert_cmpint(data.active, ==, 0);
g_assert(!g_main_context_iteration(NULL, false));
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
event_notifier_cleanup(&data.e);
}
static void test_source_wait_event_notifier_noflush(void)
{
EventNotifierTestData data = { .n = 0 };
EventNotifierTestData dummy = { .n = 0, .active = 1 };
event_notifier_init(&data.e, false);
set_event_notifier(ctx, &data.e, event_ready_cb);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 0);
/* Until there is an active descriptor, glib may or may not call
* event_ready_cb. Still, it must not block. */
event_notifier_set(&data.e);
g_main_context_iteration(NULL, true);
data.n = 0;
/* An active event notifier forces aio_poll to look at EventNotifiers. */
event_notifier_init(&dummy.e, false);
set_event_notifier(ctx, &dummy.e, event_ready_cb);
event_notifier_set(&data.e);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
g_assert(!g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 1);
event_notifier_set(&data.e);
g_assert(g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 2);
g_assert(!g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 2);
event_notifier_set(&dummy.e);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 2);
g_assert_cmpint(dummy.n, ==, 1);
g_assert_cmpint(dummy.active, ==, 0);
set_event_notifier(ctx, &dummy.e, NULL);
event_notifier_cleanup(&dummy.e);
set_event_notifier(ctx, &data.e, NULL);
while (g_main_context_iteration(NULL, false));
g_assert_cmpint(data.n, ==, 2);
event_notifier_cleanup(&data.e);
}
static void test_source_timer_schedule(void)
{
TimerTestData data = { .n = 0, .ctx = ctx, .ns = SCALE_MS * 750LL,
.max = 2,
.clock_type = QEMU_CLOCK_REALTIME };
EventNotifier e;
int64_t expiry;
/* aio_poll will not block to wait for timers to complete unless it has
* an fd to wait on. Fixing this breaks other tests. So create a dummy one.
*/
event_notifier_init(&e, false);
set_event_notifier(ctx, &e, dummy_io_handler_read);
do {} while (g_main_context_iteration(NULL, false));
aio_timer_init(ctx, &data.timer, data.clock_type,
SCALE_NS, timer_test_cb, &data);
expiry = qemu_clock_get_ns(data.clock_type) +
data.ns;
timer_mod(&data.timer, expiry);
g_assert_cmpint(data.n, ==, 0);
g_usleep(1 * G_USEC_PER_SEC);
g_assert_cmpint(data.n, ==, 0);
g_assert(g_main_context_iteration(NULL, true));
g_assert_cmpint(data.n, ==, 1);
expiry += data.ns;
while (data.n < 2) {
g_main_context_iteration(NULL, true);
}
g_assert_cmpint(data.n, ==, 2);
g_assert(qemu_clock_get_ns(data.clock_type) > expiry);
set_event_notifier(ctx, &e, NULL);
event_notifier_cleanup(&e);
timer_del(&data.timer);
}
/*
* Check that aio_co_enter() can chain many times
*
* Two coroutines should be able to invoke each other via aio_co_enter() many
* times without hitting a limit like stack exhaustion. In other words, the
* calls should be chained instead of nested.
*/
typedef struct {
Coroutine *other;
unsigned i;
unsigned max;
} ChainData;
static void coroutine_fn chain(void *opaque)
{
ChainData *data = opaque;
for (data->i = 0; data->i < data->max; data->i++) {
/* Queue up the other coroutine... */
aio_co_enter(ctx, data->other);
/* ...and give control to it */
qemu_coroutine_yield();
}
}
static void test_queue_chaining(void)
{
/* This number of iterations hit stack exhaustion in the past: */
ChainData data_a = { .max = 25000 };
ChainData data_b = { .max = 25000 };
data_b.other = qemu_coroutine_create(chain, &data_a);
data_a.other = qemu_coroutine_create(chain, &data_b);
qemu_coroutine_enter(data_b.other);
g_assert_cmpint(data_a.i, ==, data_a.max);
g_assert_cmpint(data_b.i, ==, data_b.max - 1);
/* Allow the second coroutine to terminate */
qemu_coroutine_enter(data_a.other);
g_assert_cmpint(data_b.i, ==, data_b.max);
}
static void co_check_current_thread(void *opaque)
{
QemuThread *main_thread = opaque;
assert(qemu_thread_is_self(main_thread));
}
static void *test_aio_co_enter(void *co)
{
/*
* qemu_get_current_aio_context() should not to be the main thread
* AioContext, because this is a worker thread that has not taken
* the BQL. So aio_co_enter will schedule the coroutine in the
* main thread AioContext.
*/
aio_co_enter(qemu_get_aio_context(), co);
return NULL;
}
static void test_worker_thread_co_enter(void)
{
QemuThread this_thread, worker_thread;
Coroutine *co;
qemu_thread_get_self(&this_thread);
co = qemu_coroutine_create(co_check_current_thread, &this_thread);
qemu_thread_create(&worker_thread, "test_aio_co_enter",
test_aio_co_enter,
co, QEMU_THREAD_JOINABLE);
/* Test aio_co_enter from a worker thread. */
qemu_thread_join(&worker_thread);
g_assert(aio_poll(ctx, true));
g_assert(!aio_poll(ctx, false));
}
/* End of tests. */
int main(int argc, char **argv)
{
qemu_init_main_loop(&error_fatal);
ctx = qemu_get_aio_context();
while (g_main_context_iteration(NULL, false));
g_test_init(&argc, &argv, NULL);
g_test_add_func("/aio/bh/schedule", test_bh_schedule);
g_test_add_func("/aio/bh/schedule10", test_bh_schedule10);
g_test_add_func("/aio/bh/cancel", test_bh_cancel);
g_test_add_func("/aio/bh/delete", test_bh_delete);
g_test_add_func("/aio/bh/callback-delete/one", test_bh_delete_from_cb);
g_test_add_func("/aio/bh/callback-delete/many", test_bh_delete_from_cb_many);
g_test_add_func("/aio/bh/flush", test_bh_flush);
g_test_add_func("/aio/event/add-remove", test_set_event_notifier);
g_test_add_func("/aio/event/wait", test_wait_event_notifier);
g_test_add_func("/aio/event/wait/no-flush-cb", test_wait_event_notifier_noflush);
g_test_add_func("/aio/event/flush", test_flush_event_notifier);
g_test_add_func("/aio/timer/schedule", test_timer_schedule);
g_test_add_func("/aio/coroutine/queue-chaining", test_queue_chaining);
g_test_add_func("/aio/coroutine/worker-thread-co-enter", test_worker_thread_co_enter);
g_test_add_func("/aio-gsource/flush", test_source_flush);
g_test_add_func("/aio-gsource/bh/schedule", test_source_bh_schedule);
g_test_add_func("/aio-gsource/bh/schedule10", test_source_bh_schedule10);
g_test_add_func("/aio-gsource/bh/cancel", test_source_bh_cancel);
g_test_add_func("/aio-gsource/bh/delete", test_source_bh_delete);
g_test_add_func("/aio-gsource/bh/callback-delete/one", test_source_bh_delete_from_cb);
g_test_add_func("/aio-gsource/bh/callback-delete/many", test_source_bh_delete_from_cb_many);
g_test_add_func("/aio-gsource/bh/flush", test_source_bh_flush);
g_test_add_func("/aio-gsource/event/add-remove", test_source_set_event_notifier);
g_test_add_func("/aio-gsource/event/wait", test_source_wait_event_notifier);
g_test_add_func("/aio-gsource/event/wait/no-flush-cb", test_source_wait_event_notifier_noflush);
g_test_add_func("/aio-gsource/event/flush", test_source_flush_event_notifier);
g_test_add_func("/aio-gsource/timer/schedule", test_source_timer_schedule);
return g_test_run();
}
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