Make resolve and failover test work with CK_FORK=no

The leak checking code which is used by the resolve and failover tests
frees talloc's autofree context which is not recommended. As a
consequence the initialization of tevent failed when it was called by
the second test and CF_FORK=no, because it holds some data in the
autofree context.

This patch introduces a global talloc context which should be uses by
the test as the root of their memory hierarchy instead of NULL. This
global context is used in the leak checking routines.

Not all types of memory leaks can be detected by the new version , it is
recommended to use valgrind or similar tools additionally.

4 files changed, 11 insertions, 6 deletions

diff --git a/server/tests/common.c b/server/tests/common.c
index 5b341abc..dad9dc66 100644
--- a/server/tests/common.c
+++ b/server/tests/common.c
@@ -47,7 +47,7 @@ _check_leaks(TALLOC_CTX *ctx, size_t bytes, const char *location)
     bytes_allocated = talloc_total_size(ctx);
     if (bytes_allocated != bytes) {
         fprintf(stderr, "Leak report for %s:\n", location);
-        talloc_report_full(NULL, stderr);
+        talloc_report_full(ctx, stderr);
         fail("%s: memory leaks detected, %d bytes still allocated",
              location, bytes_allocated - bytes);
     }
@@ -91,14 +91,17 @@ void
 leak_check_setup(void)
 {
     talloc_enable_null_tracking();
+    global_talloc_context = talloc_new(NULL);
+    fail_unless(global_talloc_context != NULL, "talloc_new failed");
+    check_leaks_push(global_talloc_context);
 }
 
 void
 leak_check_teardown(void)
 {
+    check_leaks_pop(global_talloc_context);
     if (snapshot_stack != NULL) {
         fail("Exiting with a non-empty stack");
     }
-    talloc_free(talloc_autofree_context());
-    check_leaks(NULL, 0);
+    check_leaks(global_talloc_context, 0);
 }
diff --git a/server/tests/common.h b/server/tests/common.h
index 39a2b8e0..44e2d9af 100644
--- a/server/tests/common.h
+++ b/server/tests/common.h
@@ -3,6 +3,8 @@
 
 #include <talloc.h>
 
+TALLOC_CTX *global_talloc_context;
+
 #define check_leaks(ctx, bytes) _check_leaks((ctx), (bytes), __location__)
 void _check_leaks(TALLOC_CTX *ctx,
                   size_t bytes,
diff --git a/server/tests/fail_over-tests.c b/server/tests/fail_over-tests.c
index c3e9dfe5..e794f03b 100644
--- a/server/tests/fail_over-tests.c
+++ b/server/tests/fail_over-tests.c
@@ -62,7 +62,7 @@ setup_test(void)
     struct test_ctx *ctx;
     int ret;
 
-    ctx = talloc_zero(NULL, struct test_ctx);
+    ctx = talloc_zero(global_talloc_context, struct test_ctx);
     fail_if(ctx == NULL, "Could not allocate memory for test context");
 
     ctx->ev = tevent_context_init(ctx);
diff --git a/server/tests/resolv-tests.c b/server/tests/resolv-tests.c
index c1b32781..04b9e2e7 100644
--- a/server/tests/resolv-tests.c
+++ b/server/tests/resolv-tests.c
@@ -60,7 +60,7 @@ static int setup_resolv_test(struct resolv_test_ctx **ctx)
     struct resolv_test_ctx *test_ctx;
     int ret;
 
-    test_ctx = talloc_zero(NULL, struct resolv_test_ctx);
+    test_ctx = talloc_zero(global_talloc_context, struct resolv_test_ctx);
     if (test_ctx == NULL) {
         fail("Could not allocate memory for test context");
         return ENOMEM;
@@ -109,7 +109,7 @@ START_TEST(test_copy_hostent)
             sizeof(addr_1), addr_list
     };
 
-    ctx = talloc_new(NULL);
+    ctx = talloc_new(global_talloc_context);
     fail_if(ctx == NULL);
 
     check_leaks_push(ctx);