user: 请从给定的汇编指令推导出C源代码:

```asm
<main>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x8,%rsp
  mov    $0x30,%edi
  call   <malloc@plt>
  mov    %rax,%r12
  lea    0x8(%rax),%r14
  mov    $0x4,%r13d
  mov    $0x61,%ebx
L10:
  lea    -0x1(%r13),%r15d
  mov    %r14,%rbp
  mov    %r15d,-0x8(%r14)
  mov    %r13,%rdi
  call   <malloc@plt>
  mov    %rax,(%r14)
  test   %r15d,%r15d
  jle    L3
  mov    $0x0,%eax
L15:
  mov    %ebx,%ecx
  add    $0x1,%ebx
  mov    0x0(%rbp),%rdx
  mov    %cl,(%rdx,%rax,1)
  lea    0x1(%rax),%edx
  add    $0x1,%rax
  cmp    %eax,-0x8(%rbp)
  jg     L15
L41:
  movslq %edx,%rdx
  mov    0x0(%rbp),%rax
  movb   $0x0,0x1(%rax,%rdx,1)
  add    $0x3,%r13
  add    $0x10,%r14
  cmp    $0xd,%r13
  jne    L10
  mov    %r12,%rbp
  mov    $0x0,%ebx
  lea    D42(%rip),%r13
L37:
  mov    0x8(%rbp),%rcx
  mov    0x0(%rbp),%edx
  mov    %ebx,%esi
  mov    %r13,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  add    $0x1,%ebx
  add    $0x10,%rbp
  cmp    $0x3,%ebx
  jne    L37
  mov    (%r12),%edx
  mov    %r12,%rsi
  lea    D128(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    (%r12),%eax
  lea    0x1(%rax),%ecx
  mov    %ecx,(%r12)
  mov    %r12,%rdx
  lea    D17(%rip),%rsi
  lea    D71(%rip),%rbx
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x10(%r12),%rbp
  mov    0x10(%r12),%ecx
  mov    %rbp,%rdx
  lea    D55(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  lea    0x20(%r12),%r13
  mov    0x10(%r12),%ecx
  mov    %r13,%rdx
  lea    D76(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x20(%r12),%ecx
  mov    %r13,%rdx
  lea    D53(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x8(%r12),%rdx
  mov    %rdx,%rcx
  mov    %r12,%rsi
  lea    D108(%rip),%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x8(%r12),%rcx
  movsbl (%rcx),%r9d
  mov    %rcx,%r8
  mov    %r12,%rdx
  lea    D73(%rip),%r13
  mov    %r13,%rsi
  lea    D106(%rip),%rbx
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x8(%r12),%rax
  lea    0x1(%rax),%rcx
  mov    %rcx,0x8(%r12)
  movsbl (%rax),%r9d
  mov    %rcx,%r8
  mov    %r12,%rdx
  lea    D29(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x8(%r12),%rax
  movzbl (%rax),%r9d
  lea    0x1(%r9),%edx
  mov    %dl,(%rax)
  mov    0x8(%r12),%rcx
  movsbl %r9b,%r9d
  mov    %rcx,%r8
  mov    %r12,%rdx
  lea    D51(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x18(%r12),%rcx
  mov    0x8(%r12),%rax
  movsbl (%rax),%r9d
  mov    %rcx,%r8
  mov    %rbp,%rdx
  lea    D9(%rip),%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    0x18(%r12),%rcx
  movsbl (%rcx),%r9d
  mov    %rcx,%r8
  mov    %rbp,%rdx
  mov    %r13,%rsi
  mov    %rbx,%rdi
  mov    $0x0,%eax
  call   <printf@plt>
  mov    $0x0,%eax
  add    $0x8,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L3:
  mov    $0x0,%edx
  jmp    L41
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D42
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D128
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D17
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D71
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D55
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D76
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D53
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D108
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D73
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D106
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D29
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D51
type_guessed: string
name: extract_symbolic_data
arguments: data_tag: D9
type_guessed: string

tool: D42: [%d] len: %d, str:  %s


tool: D128: 
p: %p, p->len: %d


tool: D17: ++p->len

tool: D71: (%s)
	p: %p, newlen: %d


tool: D55: (++p)->len

tool: D76: (p++)->len

tool: D53: p->len

tool: D108: 
p2: %p, p2->str: %p (%s)


tool: D73: *p2->str

tool: D106: (%s)
	p2: %p, p2->str: %p (%s), newstr: %c


tool: D29: *p2->str++

tool: D51: (*p2->str)++

tool: D9: *p2++->str

assistant: ```c
int main(int argc, char *argv[]) {
  int n = 3;
  struct string {
    int len;
    char *str;
  } * p, *p2;
  p = (struct string *)malloc(sizeof(struct string) * n);
  p2 = p;
  int i, j;
  char c = 'a';
  for (i = 0; i < n; i++) {
    p[i].len = (i + 1) * n;
    p[i].str = (char *)malloc(sizeof(char) * p[i].len + 1);
    for (j = 0; j < p[i].len; j++) {
      p[i].str[j] = c++;
    }
    p[i].str[j + 1] = '\0';
  }
  for (i = 0; i < n; i++) {
    printf("[%d] len: %d, str:  %s\n", i, p[i].len, p[i].str);
  }
  printf("\np: %p, p->len: %d\n", p, p->len);
  int newlen = ++p->len;
  printf("(%s)\n\tp: %p, newlen: %d\n", "++p->len", p, newlen);
  newlen = (++p)->len;
  printf("(%s)\n\tp: %p, newlen: %d\n", "(++p)->len", p, newlen);
  newlen = (p++)->len;
  printf("(%s)\n\tp: %p, newlen: %d\n", "(p++)->len", p, newlen);
  newlen = p->len;
  printf("(%s)\n\tp: %p, newlen: %d\n", "p->len", p, newlen);
  printf("\np2: %p, p2->str: %p (%s)\n", p2, p2->str, p2->str);
  char newstr = *p2->str;
  printf("(%s)\n\tp2: %p, p2->str: %p (%s), newstr: %c\n", "*p2->str", p2, p2->str, p2->str, newstr);
  newstr = *p2->str++;
  printf("(%s)\n\tp2: %p, p2->str: %p (%s), newstr: %c\n", "*p2->str++", p2, p2->str, p2->str, newstr);
  newstr = (*p2->str)++;
  printf("(%s)\n\tp2: %p, p2->str: %p (%s), newstr: %c\n", "(*p2->str)++", p2, p2->str, p2->str, newstr);
  newstr = *p2++->str;
  printf("(%s)\n\tp2: %p, p2->str: %p (%s), newstr: %c\n", "*p2++->str", p2, p2->str, p2->str, newstr);
  newstr = *p2->str;
  printf("(%s)\n\tp2: %p, p2->str: %p (%s), newstr: %c\n", "*p2->str", p2, p2->str, p2->str, newstr);
  return 0;
}
```