Add abi0 conflict tests

[lttng-ust.git] / tests / regression / abi0-conflict / fake-ust.c

diff --git a/tests/regression/abi0-conflict/fake-ust.c b/tests/regression/abi0-conflict/fake-ust.c
new file mode 100644 (file)
index 0000000..f47cdc2
--- /dev/null
+++ b/tests/regression/abi0-conflict/fake-ust.c
@@ -0,0 +1,37 @@
+/*
+ * SPDX-License-Identifier: LGPL-2.1-only
+ *
+ * Copyright (C) 2021 Michael Jeanson <mjeanson@efficios.com>
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+
+#include "./fake-ust.h"
+
+void init_usterr(void)
+{
+       fprintf(stderr, "libfakeust0: init_usterr() called.\n");
+}
+
+/*
+ * The symbol used by liblttng-ust.so.1 to detect liblttng-ust.so.0 in a
+ * process.
+ */
+int ltt_probe_register(struct lttng_probe_desc *desc __attribute__((unused)))
+{
+       fprintf(stderr, "libfakeust0: ltt_probe_register() called.\n");
+       return 0;
+}
+
+/*
+ * This constructor calls the 'init_usterr' canary function which is provided
+ * by liblttng-ust.so.1.
+ */
+static
+void fake_ust_ctor(void)
+       __attribute__((constructor));
+static void fake_ust_ctor(void)
+{
+       init_usterr();
+}