#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
long atol(char *);
int /*<<< orphan*/ printf(char *);
int syscall(int, long);
int main(int argc, char *argv[]) {
  if (argc != 2) {
    printf("Pass Process ID as command line argument\n");
    return 0;
  }
  long pid = atol(argv[1]);
  if (syscall(286, pid) == -1) {
    printf("The PID doesnot exist\n");
  } else {
    printf("Type bash to get root access. If you passed a bash pid\n");
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
je     1168 <main+0x38>
lea    0xea9(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
jmp    11b4 <main+0x84>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
call   1050 <atol@plt>
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rsi
mov    $0x11e,%edi
call   1040 <syscall@plt>
cmp    $0xffffffff,%eax
jne    11a1 <main+0x71>
lea    0xe93(%rip),%rdi
call   1030 <printf@plt>
jmp    11ad <main+0x7d>
lea    0xe99(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jne    1163 <main+0x33>
mov    0x8(%rsi),%rdi
call   1050 <atol@plt>
mov    $0x11e,%edi
mov    %rax,%rsi
call   1040 <syscall@plt>
cmp    $0xffffffff,%eax
lea    0xee1(%rip),%rax
lea    0xea3(%rip),%rdi
cmove  %rax,%rdi
jmp    116a <main+0x3a>
lea    0xee3(%rip),%rdi
call   1030 <puts@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [42 x i8] c"Pass Process ID as command line argument\0A\00"
@.str.1 = [23 x i8] c"The PID doesnot exist\0A\00"
@.str.2 = [56 x i8] c"Type bash to get root access. If you passed a bash pid\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i64
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 2
br i1 %8, label %9, label %11
9: ; preds = %2
%10 = call i32 @printf(i8* getelementptr inbounds ([42 x i8], [42 x i8]* @.str, i64 0, i64 0))
store i32 0, i32* %3
br label %24
11: ; preds = %2
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 1
%14 = load i8*, i8** %13
%15 = call i64 @atol(i8* %14)
store i64 %15, i64* %6
%16 = load i64, i64* %6
%17 = call i32 @syscall(i32 286, i64 %16)
%18 = icmp eq i32 %17, -1
br i1 %18, label %19, label %21
19: ; preds = %11
%20 = call i32 @printf(i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str.1, i64 0, i64 0))
br label %23
21: ; preds = %11
%22 = call i32 @printf(i8* getelementptr inbounds ([56 x i8], [56 x i8]* @.str.2, i64 0, i64 0))
br label %23
23: ; preds = %21, %19
store i32 0, i32* %3
br label %24
24: ; preds = %23, %9
%25 = load i32, i32* %3
ret i32 %25
}

LLVM IR (-O2):
@str = [55 x i8] c"Type bash to get root access. If you passed a bash pid\00"
@str.3 = [22 x i8] c"The PID doesnot exist\00"
@str.4 = [41 x i8] c"Pass Process ID as command line argument\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %4, label %11
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
%7 = tail call i64 @atol(i8* %6)
%8 = tail call i32 @syscall(i32 286, i64 %7)
%9 = icmp eq i32 %8, -1
%10 = select i1 %9, i8* getelementptr inbounds ([22 x i8], [22 x i8]* @str.3, i64 0, i64 0), i8* getelementptr inbounds ([55 x i8], [55 x i8]* @str, i64 0, i64 0)
br label %11
11: ; preds = %4, %2
%12 = phi i8* [ getelementptr inbounds ([41 x i8], [41 x i8]* @str.4, i64 0, i64 0), %2 ], [ %10, %4 ]
%13 = tail call i32 @puts(i8* dereferenceable(1) %12)
ret i32 0
}