mirror of
https://github.com/GrapheneOS/hardened_malloc.git
synced 2024-10-01 01:36:01 -04:00
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
#ifndef UTIL_H
|
|
#define UTIL_H
|
|
|
|
#include <stdint.h>
|
|
#include <stdnoreturn.h>
|
|
|
|
#define likely(x) __builtin_expect(!!(x), 1)
|
|
#define unlikely(x) __builtin_expect(!!(x), 0)
|
|
|
|
#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; })
|
|
|
|
#define COLD __attribute__((cold))
|
|
#define UNUSED __attribute__((unused))
|
|
#define EXPORT __attribute__((visibility("default")))
|
|
|
|
#define STRINGIFY(s) #s
|
|
#define ALIAS(f) __attribute__((alias(STRINGIFY(f))))
|
|
|
|
static inline int ffzl(long x) {
|
|
return __builtin_ffsl(~x);
|
|
}
|
|
|
|
COLD noreturn void fatal_error(const char *s);
|
|
|
|
typedef uint8_t u8;
|
|
typedef uint16_t u16;
|
|
typedef uint32_t u32;
|
|
typedef uint64_t u64;
|
|
typedef unsigned __int128 u128;
|
|
|
|
// use __register_atfork directly to avoid linking with libpthread for glibc < 2.28
|
|
#ifdef __GLIBC__
|
|
#if !__GLIBC_PREREQ(2, 28)
|
|
extern void *__dso_handle;
|
|
extern int __register_atfork(void (*)(void), void (*)(void), void (*)(void), void *);
|
|
#define atfork(prepare, parent, child) __register_atfork(prepare, parent, child, __dso_handle)
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef atfork
|
|
#define atfork pthread_atfork
|
|
#endif
|
|
|
|
#ifdef CONFIG_SEAL_METADATA
|
|
|
|
#ifdef __GLIBC__
|
|
#if __GLIBC_PREREQ(2, 27)
|
|
#define USE_PKEY
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef USE_PKEY
|
|
#error "CONFIG_SEAL_METADATA requires Memory Protection Key support"
|
|
#endif
|
|
|
|
#endif // CONFIG_SEAL_METADATA
|
|
|
|
#endif
|