user: What is the c source code of the assembly code below:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %fs:0x28,%rax
  mov    %rax,0x28(%rsp)
  xor    %eax,%eax
  lea    0xc(%rsp),%rbx
  mov    $0x0,%edx
  mov    %ebx,%esi
  mov    D67(%rip),%rax
  mov    (%rax),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    $0x0,%esi
  mov    %rbx,%rdi
  call   <settimeofday@plt>
  lea    0x10(%rsp),%rbx
  mov    D49(%rip),%rbp
  mov    D46(%rip),%r12
  mov    %rbx,%rdx
  mov    0x0(%rbp),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    D28(%rip),%r14
  mov    %rbx,%rdx
  mov    0x0(%rbp),%esi
  mov    (%r14),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    D74(%rip),%r13
  mov    %rbx,%rdx
  mov    0x0(%rbp),%esi
  mov    0x0(%r13),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    D93(%rip),%r15
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    D16(%rip),%r15
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    D52(%rip),%r15
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    (%r14),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    (%r15),%esi
  mov    0x0(%r13),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    %rbx,%rdx
  mov    0x0(%rbp),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  addq   $0x1,0x18(%rsp)
  mov    D65(%rip),%r12
  mov    %rbx,%rcx
  mov    D11(%rip),%rax
  mov    (%rax),%edx
  mov    0x0(%rbp),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  movq   $0x0,0x18(%rsp)
  movl   $0x2710,0x10(%rsp)
  mov    %rbx,%rcx
  mov    $0x0,%edx
  mov    0x0(%rbp),%esi
  mov    (%r12),%edi
  mov    $0x0,%eax
  call   <syscall@plt>
  mov    0x28(%rsp),%rax
  sub    %fs:0x28,%rax
  jne    L3
  mov    $0x0,%eax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L3:
  call   <__stack_chk_fail@plt>
```

assistant: ```c
int main() {
  int t;
  struct timeval tv;
  struct timespec ts;
  time_t tt;
  t = syscall(SYS_gettimeofday, &tv, NULL);
  settimeofday(&tv, NULL);
  syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_settime, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_getres, CLOCK_REALTIME, &ts);
  syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_settime, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_getres, CLOCK_MONOTONIC, &ts);
  syscall(SYS_clock_gettime, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_settime, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_getres, CLOCK_PROCESS_CPUTIME_ID, &ts);
  syscall(SYS_clock_gettime, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_settime, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_getres, CLOCK_THREAD_CPUTIME_ID, &ts);
  syscall(SYS_clock_gettime, CLOCK_REALTIME, &ts);
  ts.tv_sec++;
  syscall(SYS_clock_nanosleep, CLOCK_REALTIME, TIMER_ABSTIME, &ts);
  ts.tv_sec = 0;
  ts.tv_nsec = 10000;
  syscall(SYS_clock_nanosleep, CLOCK_REALTIME, 0x0, &ts);
  return 0;
}
```