const char *file, unsigned line);
void *failtest_mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset, const char *file, unsigned line);
const char *file, unsigned line);
void *failtest_mmap(void *addr, size_t length, int prot, int flags,
int fd, off_t offset, const char *file, unsigned line);