callFunction() freezes with no exception

[bernie-g]

I'm trying to call a function with a single boolean argument and a void return type and the function just seems to freeze and not do anything.

Here's my code (with added types):

const args: FunctionArg[] = [{ type: T_BOOL, value: true }];
const result = callFunction(
      gameAssembly.modBaseAddr,
      args,
      T_VOID,
      13576672
    );```

[Rob--]

What exactly is callFunction referencing? Is 13576672 supposed to be 0x13576672 by any chance? The documentation states the first argument should also be the handle of the process you open, not the base address of a module

[bernie-g]

The address I just converted from hex to an int, so it should be fine.

I changed it to use the process handle and now the game just crashes, although it's more than likely because of my inexperience with this stuff.

Here's my code now:

    const args: FunctionArg[] = [{ type: T_BOOL, value: true }];
    const result = callFunction(amongUs?.handle, args, T_VOID, 0xcf29e0);

When I il2cpp dumped the game it said the RVA of this method was 0xcf29e0, which is what I'm using.

The crash report from the unity log reporter says: Write to location 00CF29E0 caused an access violation.

[Rob--]

Can you paste the decompiled function as well (just curious)? And if it's the RVA, try passing amongUs?.modBaseAddr + 0xcf29e0 as the address, you need to get the absolute address in memory

[bernie-g]

Well il2cppdumper doesn't decompile the functions, it only gives their signatures. The function is this:

    // RVA: 0xCF29E0 Offset: 0xCF11E0 VA: 0x10CF29E0
    public void ChangeGamePublic(bool JKJKFOOKPCD) { }

I tried the snippet you sent and it still crashes with the same error.

[Rob--]

Oops, change amongUs?.modBaseAddr to the base address of the module this function lies in, probably GameAssembly.dll

[bernie-g]

Sweet, that stops the crashing. Now it just doesn't do anything and returns { exitCode: 4279337192 }.

[bernie-g]

Oh shoot, it works! I was calling a slightly different method. Thank you so much!