Currently, the KUNIT_EXPECT_STREQ() and related macros assign both string arguments to variables of their own type (via typeof()). This seems to be to prevent the macro argument from being evaluated multiple times.
However, this doesn't work if one of these is a fixed-length character array, rather than a character pointer, as (for example) char[16] will always allocate a new string.
By always using 'const char*' (the type strcmp expects), we're always just taking a pointer to the string, which works even with character arrays.
Signed-off-by: David Gow davidgow@google.com Reviewed-by: Daniel Latypov dlatypov@google.com Reviewed-by: Brendan Higgins brendanhiggins@google.com --- include/kunit/test.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
Changes since v1: https://lore.kernel.org/linux-kselftest/20210507050908.1008686-2-davidgow@go... - Fix a typo in the description ('yhis' -> 'this').
diff --git a/include/kunit/test.h b/include/kunit/test.h index 4c56ffcb7403..b68c61348121 100644 --- a/include/kunit/test.h +++ b/include/kunit/test.h @@ -1128,8 +1128,8 @@ do { \ fmt, \ ...) \ do { \ - typeof(left) __left = (left); \ - typeof(right) __right = (right); \ + const char *__left = (left); \ + const char *__right = (right); \ \ KUNIT_ASSERTION(test, \ strcmp(__left, __right) op 0, \