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/*
* This file provides wrappers with KASAN instrumentation for atomic operations.
* To use this functionality an arch's atomic.h file needs to define all
* atomic operations with arch_ prefix (e.g. arch_atomic_read()) and include
* this file at the end. This file provides atomic_read() that forwards to
* arch_atomic_read() for actual atomic operation.
* Note: if an arch atomic operation is implemented by means of other atomic
* operations (e.g. atomic_read()/atomic_cmpxchg() loop), then it needs to use
* arch_ variants (i.e. arch_atomic_read()/arch_atomic_cmpxchg()) to avoid
* double instrumentation.
*/
#ifndef _LINUX_ATOMIC_INSTRUMENTED_H
#define _LINUX_ATOMIC_INSTRUMENTED_H
#include <linux/build_bug.h>
#include <linux/kasan-checks.h>
static __always_inline int atomic_read(const atomic_t *v)
{
kasan_check_read(v, sizeof(*v));
return arch_atomic_read(v);
}
static __always_inline s64 atomic64_read(const atomic64_t *v)
{
kasan_check_read(v, sizeof(*v));
return arch_atomic64_read(v);
}
static __always_inline void atomic_set(atomic_t *v, int i)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_set(v, i);
}
static __always_inline void atomic64_set(atomic64_t *v, s64 i)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_set(v, i);
}
static __always_inline int atomic_xchg(atomic_t *v, int i)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_xchg(v, i);
}
static __always_inline s64 atomic64_xchg(atomic64_t *v, s64 i)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_xchg(v, i);
}
static __always_inline int atomic_cmpxchg(atomic_t *v, int old, int new)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_cmpxchg(v, old, new);
}
static __always_inline s64 atomic64_cmpxchg(atomic64_t *v, s64 old, s64 new)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_cmpxchg(v, old, new);
}
#ifdef arch_atomic_try_cmpxchg
#define atomic_try_cmpxchg atomic_try_cmpxchg
static __always_inline bool atomic_try_cmpxchg(atomic_t *v, int *old, int new)
{
kasan_check_write(v, sizeof(*v));
kasan_check_read(old, sizeof(*old));
return arch_atomic_try_cmpxchg(v, old, new);
}
#endif
#ifdef arch_atomic64_try_cmpxchg
#define atomic64_try_cmpxchg atomic64_try_cmpxchg
static __always_inline bool atomic64_try_cmpxchg(atomic64_t *v, s64 *old, s64 new)
{
kasan_check_write(v, sizeof(*v));
kasan_check_read(old, sizeof(*old));
return arch_atomic64_try_cmpxchg(v, old, new);
}
#endif
static __always_inline int __atomic_add_unless(atomic_t *v, int a, int u)
{
kasan_check_write(v, sizeof(*v));
return __arch_atomic_add_unless(v, a, u);
}
static __always_inline bool atomic64_add_unless(atomic64_t *v, s64 a, s64 u)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_add_unless(v, a, u);
}
static __always_inline void atomic_inc(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_inc(v);
}
static __always_inline void atomic64_inc(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_inc(v);
}
static __always_inline void atomic_dec(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_dec(v);
}
static __always_inline void atomic64_dec(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_dec(v);
}
static __always_inline void atomic_add(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_add(i, v);
}
static __always_inline void atomic64_add(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_add(i, v);
}
static __always_inline void atomic_sub(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_sub(i, v);
}
static __always_inline void atomic64_sub(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_sub(i, v);
}
static __always_inline void atomic_and(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_and(i, v);
}
static __always_inline void atomic64_and(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_and(i, v);
}
static __always_inline void atomic_or(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_or(i, v);
}
static __always_inline void atomic64_or(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_or(i, v);
}
static __always_inline void atomic_xor(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic_xor(i, v);
}
static __always_inline void atomic64_xor(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
arch_atomic64_xor(i, v);
}
static __always_inline int atomic_inc_return(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_inc_return(v);
}
static __always_inline s64 atomic64_inc_return(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_inc_return(v);
}
static __always_inline int atomic_dec_return(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_dec_return(v);
}
static __always_inline s64 atomic64_dec_return(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_dec_return(v);
}
static __always_inline s64 atomic64_inc_not_zero(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_inc_not_zero(v);
}
static __always_inline s64 atomic64_dec_if_positive(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_dec_if_positive(v);
}
static __always_inline bool atomic_dec_and_test(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_dec_and_test(v);
}
static __always_inline bool atomic64_dec_and_test(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_dec_and_test(v);
}
static __always_inline bool atomic_inc_and_test(atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_inc_and_test(v);
}
static __always_inline bool atomic64_inc_and_test(atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_inc_and_test(v);
}
static __always_inline int atomic_add_return(int i, atomic_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic_add_return(i, v);
}
static __always_inline s64 atomic64_add_return(s64 i, atomic64_t *v)
{
kasan_check_write(v, sizeof(*v));
return arch_atomic64_add_return(i,
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