1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __LINUX_COMPILER_TYPES_H
3 #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
6 /* Some compiler specific definitions are overwritten here
10 #ifdef uninitialized_var
11 #undef uninitialized_var
12 #define uninitialized_var(x) x = *(&(x))
15 /* same as gcc, this was present in clang-2.6 so we can assume it works
16 * with any version that can compile the kernel
18 #define __UNIQUE_ID(prefix) __PASTE(__PASTE(__UNIQUE_ID_, prefix), __COUNTER__)
20 /* all clang versions usable with the kernel support KASAN ABI version 5 */
21 #define KASAN_ABI_VERSION 5
23 /* emulate gcc's __SANITIZE_ADDRESS__ flag */
24 #if __has_feature(address_sanitizer)
25 #define __SANITIZE_ADDRESS__
28 #undef __no_sanitize_address
29 #define __no_sanitize_address __attribute__((no_sanitize("address")))
31 /* Clang doesn't have a way to turn it off per-function, yet. */
37 * Not all versions of clang implement the the type-generic versions
38 * of the builtin overflow checkers. Fortunately, clang implements
39 * __has_builtin allowing us to avoid awkward version
40 * checks. Unfortunately, we don't know which version of gcc clang
41 * pretends to be, so the macro may or may not be defined.
43 #undef COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW
44 #if __has_builtin(__builtin_mul_overflow) && \
45 __has_builtin(__builtin_add_overflow) && \
46 __has_builtin(__builtin_sub_overflow)
47 #define COMPILER_HAS_GENERIC_BUILTIN_OVERFLOW 1