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authorUriel Guajardo <urielguajardo@google.com>2021-03-11 16:23:13 +0100
committerShuah Khan <skhan@linuxfoundation.org>2021-04-02 22:19:58 +0200
commit359a376081d4fadfb073e3ddeb6bd6dc94d98341 (patch)
treebc8636048204ff2f2b4d879ae3925df93484d5b4 /include/kunit
parentkunit: tool: make --kunitconfig accept dirs, add lib/kunit fragment (diff)
downloadlinux-359a376081d4fadfb073e3ddeb6bd6dc94d98341.tar.xz
linux-359a376081d4fadfb073e3ddeb6bd6dc94d98341.zip
kunit: support failure from dynamic analysis tools
Add a kunit_fail_current_test() function to fail the currently running test, if any, with an error message. This is largely intended for dynamic analysis tools like UBSAN and for fakes. E.g. say I had a fake ops struct for testing and I wanted my `free` function to complain if it was called with an invalid argument, or caught a double-free. Most return void and have no normal means of signalling failure (e.g. super_operations, iommu_ops, etc.). Key points: * Always update current->kunit_test so anyone can use it. * commit 83c4e7a0363b ("KUnit: KASAN Integration") only updated it for CONFIG_KASAN=y * Create a new header <kunit/test-bug.h> so non-test code doesn't have to include all of <kunit/test.h> (e.g. lib/ubsan.c) * Forward the file and line number to make it easier to track down failures * Declare the helper function for nice __printf() warnings about mismatched format strings even when KUnit is not enabled. Example output from kunit_fail_current_test("message"): [15:19:34] [FAILED] example_simple_test [15:19:34] # example_simple_test: initializing [15:19:34] # example_simple_test: lib/kunit/kunit-example-test.c:24: message [15:19:34] not ok 1 - example_simple_test Fixed minor check patch with checkpatch --fix option: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Daniel Latypov <dlatypov@google.com> Signed-off-by: Uriel Guajardo <urielguajardo@google.com> Reviewed-by: Alan Maguire <alan.maguire@oracle.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Diffstat (limited to 'include/kunit')
-rw-r--r--include/kunit/test-bug.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/kunit/test-bug.h b/include/kunit/test-bug.h
new file mode 100644
index 000000000000..ce6f6edc7801
--- /dev/null
+++ b/include/kunit/test-bug.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * KUnit API allowing dynamic analysis tools to interact with KUnit tests
+ *
+ * Copyright (C) 2020, Google LLC.
+ * Author: Uriel Guajardo <urielguajardo@google.com>
+ */
+
+#ifndef _KUNIT_TEST_BUG_H
+#define _KUNIT_TEST_BUG_H
+
+#define kunit_fail_current_test(fmt, ...) \
+ __kunit_fail_current_test(__FILE__, __LINE__, fmt, ##__VA_ARGS__)
+
+#if IS_BUILTIN(CONFIG_KUNIT)
+
+extern __printf(3, 4) void __kunit_fail_current_test(const char *file, int line,
+ const char *fmt, ...);
+
+#else
+
+static __printf(3, 4) void __kunit_fail_current_test(const char *file, int line,
+ const char *fmt, ...)
+{
+}
+
+#endif
+
+#endif /* _KUNIT_TEST_BUG_H */