代码

#include <x86intrin.h>
extern "C" void __init_libc(char **envp, char *pn);
static unsigned long long t0;
void __libc_start_main(int (*mf)(int, char **), int ac, char **av) {
    __init_libc(av + ac + 1, av[0]);
    t0 = __rdtsc();
    mf(ac, av);
    unsigned long long m = __rdtsc() - t0;
    unsigned long long target = __rdtsc() + m;
    while (__rdtsc() < target) ;
    __asm__ volatile("mov $60,%eax; xor %edi,%edi; syscall");
    __builtin_unreachable();
}
int main() { return 0; }

评测结果