[PATCH 1/8] tests/qtest/migration: Fix leak of migration tests data

[Fabiano Rosas <farosas@suse.de>]

When the migration-test is invoked with the '-p' flag (to run a single
test), the glib code won't call the destroy function for the
not-executed tests, causing the MigrationTest wrapper data to leak.

This doesn't affect make check, but affects debugging use-cases where
having a leak pop up in ASAN output is extra annoying.

Fix by adding the tests data to a list and freeing them all at the end
of migration-test execution. Any tests actually dispatched by glib
will have the destroy function called as usual.

Note that migration_test_add_suffix() is altered to call
migration_test_add() so that there's only one place adding the data to
the list.

Performance is not an issue at the moment, we have < 100 tests.

Signed-off-by: Fabiano Rosas <farosas@suse.de>
---
 tests/qtest/migration/framework.c      |  2 ++
 tests/qtest/migration/migration-util.c | 19 ++++++++++++++-----
 tests/qtest/migration/migration-util.h |  2 +-
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/tests/qtest/migration/framework.c b/tests/qtest/migration/framework.c
index 0bfc241914..b9371372de 100644
--- a/tests/qtest/migration/framework.c
+++ b/tests/qtest/migration/framework.c
@@ -1162,5 +1162,7 @@ int migration_env_clean(MigrationTestEnv *env)
     }
     g_free(tmpfs);
 
+    migration_tests_free();
+
     return ret;
 }
diff --git a/tests/qtest/migration/migration-util.c b/tests/qtest/migration/migration-util.c
index c2462306a1..2648ad7f61 100644
--- a/tests/qtest/migration/migration-util.c
+++ b/tests/qtest/migration/migration-util.c
@@ -38,6 +38,7 @@
 #include "linux/kvm.h"
 #endif
 
+GQueue *tests;
 
 static char *SocketAddress_to_str(SocketAddress *addr)
 {
@@ -243,6 +244,8 @@ static void migration_test_destroy(gpointer data)
 {
     MigrationTest *test = (MigrationTest *)data;
 
+    g_queue_remove(tests, test);
+
     g_free(test->data);
     g_free(test->name);
     g_free(test);
@@ -268,21 +271,27 @@ void migration_test_add(const char *path,
 
     qtest_add_data_func_full(path, test, migration_test_wrapper,
                              migration_test_destroy);
+    if (!tests) {
+        tests = g_queue_new();
+    }
+    g_queue_push_tail(tests, test);
 }
 
 void migration_test_add_suffix(const char *path, const char *suffix,
                                void (*fn)(char *name, MigrateCommon *args))
 {
-    MigrationTest *test = g_new0(MigrationTest, 1);
+    g_autofree char *name = NULL;
 
     g_assert(g_str_has_suffix(path, "/"));
     g_assert(!g_str_has_prefix(suffix, "/"));
 
-    test->func = fn;
-    test->name = g_strconcat(path, suffix, NULL);
+    name = g_strconcat(path, suffix, NULL);
+    migration_test_add(name, fn);
+}
 
-    qtest_add_data_func_full(test->name, test, migration_test_wrapper,
-                             migration_test_destroy);
+void migration_tests_free(void)
+{
+    g_queue_free_full(tests, migration_test_destroy);
 }
 
 #ifdef O_DIRECT
diff --git a/tests/qtest/migration/migration-util.h b/tests/qtest/migration/migration-util.h
index e73d69bab0..694773e594 100644
--- a/tests/qtest/migration/migration-util.h
+++ b/tests/qtest/migration/migration-util.h
@@ -59,5 +59,5 @@ void migration_test_add_suffix(const char *path, const char *suffix,
                                void (*fn)(char *name, MigrateCommon *args));
 char *migrate_get_connect_uri(QTestState *who);
 void migrate_set_ports(QTestState *to, QList *channel_list);
-
+void migration_tests_free(void);
 #endif /* MIGRATION_UTIL_H */
-- 
2.51.0