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linux-headers-6.8.0-88
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linux
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compiler-clang.h
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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_COMPILER_TYPES_H #error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead." #endif /* Compiler specific definitions for Clang compiler */ /* * Clang prior to 17 is being silly and considers many __cleanup() variables * as unused (because they are, their sole purpose is to go out of scope). * * https://reviews.llvm.org/D152180 */ #undef __cleanup #define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func))) /* all clang versions usable with the kernel support KASAN ABI version 5 */ #define KASAN_ABI_VERSION 5 /* * Note: Checking __has_feature(*_sanitizer) is only true if the feature is * enabled. Therefore it is not required to additionally check defined(CONFIG_*) * to avoid adding redundant attributes in other configurations. */ #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer) /* Emulate GCC's __SANITIZE_ADDRESS__ flag */ #define __SANITIZE_ADDRESS__ #define __no_sanitize_address \ __attribute__((no_sanitize("address", "hwaddress"))) #else #define __no_sanitize_address #endif #if __has_feature(thread_sanitizer) /* emulate gcc's __SANITIZE_THREAD__ flag */ #define __SANITIZE_THREAD__ #define __no_sanitize_thread \ __attribute__((no_sanitize("thread"))) #else #define __no_sanitize_thread #endif #if defined(CONFIG_ARCH_USE_BUILTIN_BSWAP) #define __HAVE_BUILTIN_BSWAP32__ #define __HAVE_BUILTIN_BSWAP64__ #define __HAVE_BUILTIN_BSWAP16__ #endif /* CONFIG_ARCH_USE_BUILTIN_BSWAP */ #if __has_feature(undefined_behavior_sanitizer) /* GCC does not have __SANITIZE_UNDEFINED__ */ #define __no_sanitize_undefined \ __attribute__((no_sanitize("undefined"))) #else #define __no_sanitize_undefined #endif #if __has_feature(memory_sanitizer) #define __SANITIZE_MEMORY__ /* * Unlike other sanitizers, KMSAN still inserts code into functions marked with * no_sanitize("kernel-memory"). Using disable_sanitizer_instrumentation * provides the behavior consistent with other __no_sanitize_ attributes, * guaranteeing that __no_sanitize_memory functions remain uninstrumented. */ #define __no_sanitize_memory __disable_sanitizer_instrumentation /* * The __no_kmsan_checks attribute ensures that a function does not produce * false positive reports by: * - initializing all local variables and memory stores in this function; * - skipping all shadow checks; * - passing initialized arguments to this function's callees. */ #define __no_kmsan_checks __attribute__((no_sanitize("kernel-memory"))) #else #define __no_sanitize_memory #define __no_kmsan_checks #endif /* * Support for __has_feature(coverage_sanitizer) was added in Clang 13 together * with no_sanitize("coverage"). Prior versions of Clang support coverage * instrumentation, but cannot be queried for support by the preprocessor. */ #if __has_feature(coverage_sanitizer) #define __no_sanitize_coverage __attribute__((no_sanitize("coverage"))) #else #define __no_sanitize_coverage #endif #if __has_feature(shadow_call_stack) # define __noscs __attribute__((__no_sanitize__("shadow-call-stack"))) #endif #if __has_feature(kcfi) /* Disable CFI checking inside a function. */ #define __nocfi __attribute__((__no_sanitize__("kcfi"))) #endif /* * Turn individual warnings and errors on and off locally, depending * on version. */ #define __diag_clang(version, severity, s) \ __diag_clang_ ## version(__diag_clang_ ## severity s) /* Severity used in pragma directives */ #define __diag_clang_ignore ignored #define __diag_clang_warn warning #define __diag_clang_error error #define __diag_str1(s) #s #define __diag_str(s) __diag_str1(s) #define __diag(s) _Pragma(__diag_str(clang diagnostic s)) #if CONFIG_CLANG_VERSION >= 110000 #define __diag_clang_11(s) __diag(s) #else #define __diag_clang_11(s) #endif #define __diag_ignore_all(option, comment) \ __diag_clang(11, ignore, option)