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locking/atomics, kcsan: Add KCSAN instrumentation
This adds KCSAN instrumentation to atomic-instrumented.h. Signed-off-by: Marco Elver <elver@google.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
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@ -20,7 +20,7 @@ gen_param_check()
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# We don't write to constant parameters
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[ ${type#c} != ${type} ] && rw="read"
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printf "\tkasan_check_${rw}(${name}, sizeof(*${name}));\n"
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printf "\t__atomic_check_${rw}(${name}, sizeof(*${name}));\n"
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}
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#gen_param_check(arg...)
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@ -107,7 +107,7 @@ cat <<EOF
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#define ${xchg}(ptr, ...) \\
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({ \\
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typeof(ptr) __ai_ptr = (ptr); \\
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kasan_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
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__atomic_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
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arch_${xchg}(__ai_ptr, __VA_ARGS__); \\
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})
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EOF
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@ -148,6 +148,19 @@ cat << EOF
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#include <linux/build_bug.h>
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#include <linux/kasan-checks.h>
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#include <linux/kcsan-checks.h>
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static inline void __atomic_check_read(const volatile void *v, size_t size)
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{
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kasan_check_read(v, size);
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kcsan_check_atomic_read(v, size);
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}
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static inline void __atomic_check_write(const volatile void *v, size_t size)
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{
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kasan_check_write(v, size);
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kcsan_check_atomic_write(v, size);
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}
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EOF
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