hardened_malloc/util.h

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C
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#ifndef UTIL_H
#define UTIL_H
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#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
// C11 noreturn doesn't work in C++
#define noreturn __attribute__((noreturn))
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#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
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#define min(x, y) ({ \
__typeof__(x) _x = (x); \
__typeof__(y) _y = (y); \
(void) (&_x == &_y); \
_x < _y ? _x : _y; })
#define max(x, y) ({ \
__typeof__(x) _x = (x); \
__typeof__(y) _y = (y); \
(void) (&_x == &_y); \
_x > _y ? _x : _y; })
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#define COLD __attribute__((cold))
#define UNUSED __attribute__((unused))
#define EXPORT __attribute__((visibility("default")))
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#define STRINGIFY(s) #s
#define ALIAS(f) __attribute__((alias(STRINGIFY(f))))
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typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
typedef unsigned __int128 u128;
#define U64_WIDTH 64
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static inline int ffz64(u64 x) {
return __builtin_ffsll(~x);
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}
// parameter must not be 0
static inline int clz64(u64 x) {
return __builtin_clzll(x);
}
// parameter must not be 0
static inline u64 log2u64(u64 x) {
return U64_WIDTH - clz64(x) - 1;
}
static inline size_t align(size_t size, size_t align) {
size_t mask = align - 1;
return (size + mask) & ~mask;
}
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COLD noreturn void fatal_error(const char *s);
#if CONFIG_SEAL_METADATA
#ifdef __GLIBC__
#define USE_PKEY
#else
#error "CONFIG_SEAL_METADATA requires Memory Protection Key support"
#endif
#endif // CONFIG_SEAL_METADATA
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#endif