frida-il2cpp-bridges调试时遇到的奇怪的问题

shadowtech

[JavaScript] 纯文本查看 复制代码

import "frida-il2cpp-bridge";

Il2Cpp.perform(() => {
    const AssembleCSharp = Il2Cpp.domain.assembly("hall_xy").image;
    const HybridCLRRuntimeManager = AssembleCSharp.class('HybridCLRRuntimeManager');

    const Load = HybridCLRRuntimeManager.method('LoadDll');

    Load.implementation = function (hotFixFileName: Il2Cpp.String, target: Il2Cpp.Method) {
        console.log(`LoadDll called with argument: ${hotFixFileName}`);

        const result = this.method('LoadDll').invoke(hotFixFileName, target);

        console.log(`LoadDll returned: ${result}`);

        return result;
    }
});

明明上下调用的都是同一个方法，我打印也是没问题的，但实际在const result = 这个位置，我调用Invoke就报错了，求大佬解答。


报错信息：

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il2cpp: couldn't find method LoadDll in class System.String
    at method (il2cpp/structs/class.ts:269)
    at method (il2cpp/structs/object.ts:38)
    at <anonymous> (index.ts:12)
    at call (native)
    at <anonymous> (il2cpp/structs/method.ts:334)

mq5123

this识别为class System.String 并不是 HybridCLRRuntimeManager，具体原因不明

alongsoft2020

const YourMethod: Il2Cpp.Method = ...略;
YourMethod.implementation = function (...args) {
    if (YourMethod.class.isAssignableFrom((this as Il2Cpp.Object).class)) {
        // your code here
    } else {
        return (YourMethod as any).invokeRaw(this, ...args);
    }
};