qemu/tests/device-introspect-test.c

/*
 * Device introspection test cases
 *
 * Copyright (c) 2015 Red Hat Inc.
 *
 * Authors:
 *  Markus Armbruster <armbru@redhat.com>,
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or later.
 * See the COPYING file in the top-level directory.
 */

/*
 * Covers QMP device-list-properties and HMP device_add help.  We
 * currently don't check that their output makes sense, only that QEMU
 * survives.  Useful since we've had an astounding number of crash
 * bugs around here.
 */

#include "qemu/osdep.h"
#include "qemu-common.h"
#include "qapi/qmp/qstring.h"
#include "qapi/qmp/qbool.h"
#include "qapi/qmp/qdict.h"
#include "libqtest.h"

const char common_args[] = "-nodefaults -machine none";

static QList *qom_list_types(const char *implements, bool abstract)
{
    QDict *resp;
    QList *ret;
    QDict *args = qdict_new();

    qdict_put(args, "abstract", qbool_from_bool(abstract));
    if (implements) {
        qdict_put(args, "implements", qstring_from_str(implements));
    }
    resp = qmp("{'execute': 'qom-list-types',"
               " 'arguments': %p }", args);
    g_assert(qdict_haskey(resp, "return"));
    ret = qdict_get_qlist(resp, "return");
    QINCREF(ret);
    QDECREF(resp);
    return ret;
}

static QList *device_type_list(bool abstract)
{
    return qom_list_types("device", abstract);
}

static void test_one_device(const char *type)
{
    QDict *resp;
    char *help, *qom_tree;

    resp = qmp("{'execute': 'device-list-properties',"
               " 'arguments': {'typename': %s}}",
               type);
    QDECREF(resp);

    help = hmp("device_add \"%s,help\"", type);
    g_free(help);

    /*
     * Some devices leave dangling pointers in QOM behind.
     * "info qom-tree" has a good chance at crashing then
     */
    qom_tree = hmp("info qom-tree");
    g_free(qom_tree);
}

static void test_device_intro_list(void)
{
    QList *types;
    char *help;

    qtest_start(common_args);

    types = device_type_list(true);
    QDECREF(types);

    help = hmp("device_add help");
    g_free(help);

    qtest_end();
}

static void test_device_intro_none(void)
{
    qtest_start(common_args);
    test_one_device("nonexistent");
    qtest_end();
}

static void test_device_intro_abstract(void)
{
    qtest_start(common_args);
    test_one_device("device");
    qtest_end();
}

static void test_device_intro_concrete(void)
{
    QList *types;
    QListEntry *entry;
    const char *type;

    qtest_start(common_args);
    types = device_type_list(false);

    QLIST_FOREACH_ENTRY(types, entry) {
        type = qdict_get_try_str(qobject_to_qdict(qlist_entry_obj(entry)),
                                "name");
        g_assert(type);
        test_one_device(type);
    }

    QDECREF(types);
    qtest_end();
}

static void test_abstract_interfaces(void)
{
    QList *all_types;
    QList *obj_types;
    QListEntry *ae;

    qtest_start(common_args);
    /* qom-list-types implements=interface would return any type
     * that implements _any_ interface (not just interface types),
     * so use a trick to find the interface type names:
     * - list all object types
     * - list all types, and look for items that are not
     *   on the first list
     */
    all_types = qom_list_types(NULL, false);
    obj_types = qom_list_types("object", false);

    QLIST_FOREACH_ENTRY(all_types, ae) {
        QDict *at = qobject_to_qdict(qlist_entry_obj(ae));
        const char *aname = qdict_get_str(at, "name");
        QListEntry *oe;
        const char *found = NULL;

        QLIST_FOREACH_ENTRY(obj_types, oe) {
            QDict *ot = qobject_to_qdict(qlist_entry_obj(oe));
            const char *oname = qdict_get_str(ot, "name");
            if (!strcmp(aname, oname)) {
                found = oname;
                break;
            }
        }

        /* Using g_assert_cmpstr() will give more useful failure
         * messages than g_assert(found) */
        g_assert_cmpstr(aname, ==, found);
    }

    QDECREF(all_types);
    QDECREF(obj_types);
    qtest_end();
}

int main(int argc, char **argv)
{
    g_test_init(&argc, &argv, NULL);

    qtest_add_func("device/introspect/list", test_device_intro_list);
    qtest_add_func("device/introspect/none", test_device_intro_none);
    qtest_add_func("device/introspect/abstract", test_device_intro_abstract);
    qtest_add_func("device/introspect/concrete", test_device_intro_concrete);
    qtest_add_func("device/introspect/abstract-interfaces", test_abstract_interfaces);

    return g_test_run();
}