diff --git a/tests/libs/cfi_test_helper.cpp b/tests/libs/cfi_test_helper.cpp
new file mode 100644
index 0000000..ff313a2
--- /dev/null
+++ b/tests/libs/cfi_test_helper.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <assert.h>
+#include <stdint.h>
+#include <stdlib.h>
+
+#include "libs_utils.h"
+
+// This library is built for all targets, including host tests, so __cfi_slowpath may not be
+// present. But it is only used in the bionic loader tests.
+extern "C" __attribute__((weak)) void __cfi_slowpath(uint64_t, void*);
+
+static int g_count;
+
+// Mock a CFI-enabled library without relying on the compiler.
+extern "C" __attribute__((aligned(4096))) void __cfi_check(uint64_t /*CallSiteTypeId*/,
+                                                           void* /*TargetAddr*/, void* /*Diag*/) {
+  ++g_count;
+}
+
+void preinit_ctor() {
+  CHECK(g_count == 0);
+  __cfi_slowpath(42, reinterpret_cast<void*>(&preinit_ctor));
+  CHECK(g_count == 1);
+}
+
+__attribute__((section(".preinit_array"), used)) void (*preinit_ctor_p)(void) = preinit_ctor;
+
+__attribute__((constructor, used)) void ctor() {
+  CHECK(g_count == 1);
+  __cfi_slowpath(42, reinterpret_cast<void*>(&ctor));
+  CHECK(g_count == 2);
+}
+
+int main(void) {
+  CHECK(g_count == 2);
+  __cfi_slowpath(42, reinterpret_cast<void*>(&main));
+  CHECK(g_count == 3);
+  return 0;
+}