Try-Catch

can-throw.asm

00007FFAEE230B92  sub         esp,20h  
00007FFAEE230B95  mov         rcx,7FFB4DA35CC8h  
00007FFAEE230B9F  call        00007FFB4DF47FB0  
00007FFAEE230BA4  mov         rsi,rax  
00007FFAEE230BA7  mov         rcx,rsi  
00007FFAEE230BAA  call        00007FFB4D3EA1D0  
00007FFAEE230BAF  mov         rcx,rsi  
00007FFAEE230BB2  call        00007FFB4DD0DD70  

try-can.asm

            int i = 0;
00007FFAEE240B20  sub         rsp,28h  

            if (TryCanThrow())
00007FFAEE240B24  call        00007FFAEE240078  
00007FFAEE240B29  test        eax,eax  
00007FFAEE240B2B  je          00007FFAEE240B34  
            {
                i++;                    
00007FFAEE240B2D  mov         ecx,1  
00007FFAEE240B32  jmp         00007FFAEE240B39  
            else
            {
                i = 100;
00007FFAEE240B34  mov         ecx,64h  
            }
                
            Console.WriteLine(i);
00007FFAEE240B39  call        00007FFAEE2406E0  
00007FFAEE240B3E  nop  
00007FFAEE240B3F  add         rsp,28h  
00007FFAEE240B43  ret  

try-can.cs

[MethodImpl(MethodImplOptions.NoInlining)]
private static bool TryCanThrow()
{
    if (errorCondition == true)
        return false;
    else
        return true;
}

public static void Main(string[] args)
{
    int i = 0;

    if (TryCanThrow())
    {
        i++;                    
    }
    else
    {
        i = 100;
    }
                
    Console.WriteLine(i);
}

try-catch.cs

[MethodImpl(MethodImplOptions.NoInlining)]
private static void CanThrow()
{
    throw new NotImplementedException();
}

public static void Main(string[] args)
{
    int i = 0;

    try
    {
        CanThrow();
        i++;
    }
    catch (NotImplementedException)
    {
        i = 100;
    }

    Console.WriteLine(i);
}

with-try.asm

            int i = 0;
00007FFAEE240B22  sub         esp,30h  
00007FFAEE240B25  lea         rbp,[rsp+30h]  
00007FFAEE240B2A  mov         qword ptr [rbp-10h],rsp  

            try
            {
                CanThrow();      
00007FFAEE240B2E  call        00007FFAEE240078  
                i++;
00007FFAEE240B33  mov         dword ptr [rbp-4],1  

            Console.WriteLine(i);
00007FFAEE240B3A  mov         ecx,dword ptr [rbp-4]  

            Console.WriteLine(i);
00007FFAEE240B3D  call        00007FFAEE2406E0  
00007FFAEE240B42  nop  
00007FFAEE240B43  lea         rsp,[rbp]  
00007FFAEE240B47  pop         rbp  
00007FFAEE240B48  ret  
            int i = 0;
00007FFAEE240B49  push        rbp  
00007FFAEE240B4A  sub         rsp,30h  
00007FFAEE240B4E  mov         rbp,qword ptr [rcx+20h]  
00007FFAEE240B52  mov         qword ptr [rsp+20h],rbp  
00007FFAEE240B57  lea         rbp,[rbp+30h]  
            {
                i = 100;
00007FFAEE240B5B  mov         dword ptr [rbp-4],64h  
00007FFAEE240B62  lea         rax,[7FFAEE240B3Ah]  
00007FFAEE240B69  add         rsp,30h  
00007FFAEE240B6D  pop         rbp  
00007FFAEE240B6E  ret  

without-try.asm

            int i = 0;
00007FFAEE220B20  sub         rsp,28h  
00007FFAEE220B24  call        00007FFAEE220078  
                i++;
00007FFAEE220B29  mov         ecx,1  
00007FFAEE220B2E  call        00007FFAEE2206E0  
00007FFAEE220B33  nop  
00007FFAEE220B34  add         rsp,28h  
00007FFAEE220B38  ret