print_arg error: TypeError: cannot read property 'toString' of undefined

[Resolvit-Tech]

Hello sir,

First I want to say thank you for frida-ios-cipher.

error message: print_arg error: TypeError: cannot read property 'toString' of undefined at t (frida/runtime/hexdump.js:20) at M (agent/index.ts:240) at onEnter (agent/index.ts:381)

Do you have discord or line? your gmail does not work.

[eyJhb]

Typically happens, when trying to read from a address that is not possible, ie. 0x0.

[yml2213]

me too

[wevve]

一样的问题， frida 16.4.5 frida-tools 12.5.0

[cz43608970]

Same. How to fix it?

[eyJhb]

Check if addr is 0x0, ie. https://github.com/jitcor/frida-ios-cipher/blob/2e11a06e082ac7ed956d9528d0fc19cc92629205/agent/index.ts#L199

function print_arg(addr,len=240) {
    try {
        if(addr==null)return "\n";
        if(addr==0x0)return "\n";
        return "\n"+(hexdump(addr,{length:len})) + "\n";
    } catch (e) {
        if(e instanceof Error){
            console.error("print_arg error:",e.stack);
        }
        return addr + "\n";
    }
}

[jitcor]

This is normal and will not affect other print data. It can be ignored for now.