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locking/atomics, kcsan: Add KCSAN instrumentation

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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>
This commit is contained in:
Marco Elver 2019-11-14 19:03:02 +01:00 committed by Paul E. McKenney
parent bf07132f96
commit e75a6795ed
2 changed files with 218 additions and 192 deletions
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393
include/asm-generic/atomic-instrumented.h
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File diff suppressed because it is too large Load Diff

17
scripts/atomic/gen-atomic-instrumented.sh
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@ -20,7 +20,7 @@ gen_param_check()
# We don't write to constant parameters # We don't write to constant parameters
[ ${type#c} != ${type} ] && rw="read" [ ${type#c} != ${type} ] && rw="read"
printf "\tkasan_check_${rw}(${name}, sizeof(*${name}));\n" printf "\t__atomic_check_${rw}(${name}, sizeof(*${name}));\n"
} }
#gen_param_check(arg...) #gen_param_check(arg...)
@ -107,7 +107,7 @@ cat <<EOF
#define ${xchg}(ptr, ...) \\ #define ${xchg}(ptr, ...) \\
({ \\ ({ \\
typeof(ptr) __ai_ptr = (ptr); \\ typeof(ptr) __ai_ptr = (ptr); \\
kasan_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\ __atomic_check_write(__ai_ptr, ${mult}sizeof(*__ai_ptr)); \\
arch_${xchg}(__ai_ptr, __VA_ARGS__); \\ arch_${xchg}(__ai_ptr, __VA_ARGS__); \\
}) })
EOF EOF
@ -148,6 +148,19 @@ cat << EOF
#include <linux/build_bug.h> #include <linux/build_bug.h>
#include <linux/kasan-checks.h> #include <linux/kasan-checks.h>
#include <linux/kcsan-checks.h>
static inline void __atomic_check_read(const volatile void *v, size_t size)
{
kasan_check_read(v, size);
kcsan_check_atomic_read(v, size);
}
static inline void __atomic_check_write(const volatile void *v, size_t size)
{
kasan_check_write(v, size);
kcsan_check_atomic_write(v, size);
}
EOF EOF