diff options
| author | Kees Cook <keescook@chromium.org> | 2022-02-08 14:53:46 -0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2022-02-13 16:50:07 -0800 |
| commit | 1c7f4e5c1b6c9d9b508007c141dca77cab9434b4 (patch) | |
| tree | e54416e1377853346ffdd7347c471a524fa258a7 | |
| parent | d694dbaefd6fa6bdde84b704779eab53942753a5 (diff) | |
| download | linux-1c7f4e5c1b6c9d9b508007c141dca77cab9434b4.tar.gz | |
Compiler Attributes: Add __diagnose_as for Clang
Clang will perform various compile-time diagnostics on uses of various
functions (e.g. simple bounds-checking on strcpy(), etc). These
diagnostics can be assigned to other functions (for example, new
implementations of the string functions under CONFIG_FORTIFY_SOURCE)
using the "diagnose_as_builtin" attribute. This allows those functions
to retain their compile-time diagnostic warnings.
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: llvm@lists.linux.dev
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220208225350.1331628-5-keescook@chromium.org
| -rw-r--r-- | include/linux/compiler_attributes.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h index dcaf55f5d1ae..445e80517cab 100644 --- a/include/linux/compiler_attributes.h +++ b/include/linux/compiler_attributes.h @@ -101,6 +101,19 @@ #endif /* + * Optional: not supported by gcc + * Optional: only supported since clang >= 14.0 + * Optional: not supported by icc + * + * clang: https://clang.llvm.org/docs/AttributeReference.html#diagnose_as_builtin + */ +#if __has_attribute(__diagnose_as_builtin__) +# define __diagnose_as(builtin...) __attribute__((__diagnose_as_builtin__(builtin))) +#else +# define __diagnose_as(builtin...) +#endif + +/* * Don't. Just don't. See commit 771c035372a0 ("deprecate the '__deprecated' * attribute warnings entirely and for good") for more information. * |