Correct way to get args in onLeave?

[CaledoniaProject]

The testMethod has a pointer argument which will be modified in the method. I need to read its value in onLeave. Right now I had to store the variable in onEnter then read it in onLeave.

I'm wondering if there's a better way to do that? It's not healthy for multithread programs.

    let data = null
    Interceptor.attach(testMethod, {
        onEnter: function (args) {
            data = args[4]
        },
        onLeave: function (retval) {
            console.log(Memory.readInt(data))           
        }
    });

[FrenchYeti]

Hi, Simple by doing : ``` Interceptor.attach(testMethod, { onEnter: function (args) { this.data = args[4]; }, onLeave: function (retval){ console.log(Memory.readInt(this.data)) } }); ``` You can also use CPU context to save the value of 4th arg (example with arm64): ``` this.data = this.context.x4; ```

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-------- Message d'origine -------- Le 10 août 2021 à 16:51, CaledoniaProject a écrit :

The testMethod has a pointer argument which will be modified in the method. I need to read its value in onLeave. Right now I had to store the variable in onEnter then read it in onLeave. I'm wondering if there's a better way to do that? It's not healthy for multithread programs. let data = null Interceptor.attach(testMethod, { onEnter: function (args) { data = args[4] }, onLeave: function (retval) { console.log(Memory.readInt(data)) } }); — You are receiving this because you are subscribed to this thread. Reply to this email directly, [view it on GitHub](#65), or [unsubscribe](https://github.com/notifications/unsubscribe-auth/ACCUUQHHC2INIR5AT5H5MV3T4E4GJANCNFSM5B4KXCZQ). Triage notifications on the go with GitHub Mobile for [iOS](https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675) or [Android](https://play.google.com/store/apps/details?id=com.github.android&utm_campaign=notification-email).

[oleavr]

Also some useful hints here.

[CaledoniaProject]

Thanks!