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[Android] Method Instrumentation Causes StackOverflow and App Crash

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评估

难度
4/5
预计耗时
3-5 天
新手友好度
25/100
Issue 类型
缺陷
描述清晰度
需要澄清
活跃度
停滞
技术栈
android, javascript
领域
mobile-dev, reverse-engineering, tooling

调研方向

从 issue 中的 tracefunction 实现开始，重点关注 Java.use、overloads 以及被赋值的实现。使用链接中的 Frida 脚本和 APK 重现 Clock 应用的闹钟操作，然后确定崩溃是由 instrumentation 还是 overloads 处理导致的。完成标准是记录或修正一种受支持的方法，使其能够记录进入和退出而不会发生 stack overflow。

由索引模型根据 Issue 内容生成。

描述

System Information:

Operating System: Linux, Ubuntu 22.04
Device: Android Studio Emulator
Android Version: 10

App Information:

App Name: Clock
App Link: https://f-droid.org/en/packages/com.chen.deskclock/
App Version: 1.2.2

Issue Description:
I am trying to instrument the Clock app to log function entry and exit messages. However, I've encountered an issue where the app crashes due to stack overflow, particularly when trying to perform actions on an enabled alarm. Below is function of instrumentation. This behavior is found in some other apps too. If someone already knows the solution to this issue, please help me out.

Note: I think overloads. implementation is not able to resolve overloaded functions

function tracefunction(func) {
    //  Input example: com.chen.deskclock.data.WidgetModel.updateWidgetCount
    //  extract function name and class name
    var javaFunc = func.split(".")[func.split(".").length - 1];
    var javaClass = func.replace("." + javaFunc, "");
    try {
        var hook = Java.use(javaClass);
    }
    catch (e) {
        console.log("trace class failed");
        return;
    }

    if (typeof hook[javaFunc] != "undefined") {
        //  get method overload count of the method
        var overloadCount = hook[javaFunc].overloads.length;
        for (var i=0; i<overloadCount; i++) {
            hook[javaFunc].overloads[i].implementation = function () {
            var retval;
            console.log("\n*** entered " + func);
            retval = this[javaFunc].apply(this, arguments); // sometimes causes recursive call infinitly and causes app to crash.
            console.log("\n*** exiting " + func);
            return retval;
            }
        }
    }
}

The link to download the Frida-script and apk is here

Steps to Reproduce:

Instrument the app using Frida (latest version 16.1.4).
Create an alarm within the app.
Attempt to perform any action on the alarm, such as enabling or disabling it.

Expected Behavior:
The app should allow instrumentation to log function entry and exit messages without crashing.

Actual Behavior:
When instrumented, some functions within the app are causing a stack overflow, leading to an app crash. This issue does not occur without instrumentation.

I appreciate any guidance or solutions to address this issue, as I aim to instrument the Clock app without causing it to crash.

主要语言
JavaScript
星标
415
派生
174
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从这里开始

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  3. Fork 仓库，在一个分支上完成修改。
  4. 提交 Pull Request，并在描述里引用这个 Issue 编号。

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