dlopen hook doesn't work on Android 8.1

[vfsfitvnm]

https://github.com/vfsfitvnm/frida-il2cpp-bridge/issues/359#issuecomment-1703745592

(I need to find a Unity app I can run on the official Android x86 emulator first)

CC: @Flechaa @thinhbuzz

[Flechaa]

What about this package: com.noodlecake.altosadventure

[vfsfitvnm]

Thanks, I can reproduce.

[Flechaa]

It seems like my device doesn't use those hooks as I get

Error: There are no targets to hook, please file a bug

[vfsfitvnm]

@Flechaa That's very unfortunate. Can you debug it? https://github.com/vfsfitvnm/frida-il2cpp-bridge/blob/ad0a65f6683e8291b7d00442f0378c200e602385/src/utils/native-wait.ts

[Flechaa]

Both of this exports return null, both dlopen and android_dlopen_ext. https://github.com/vfsfitvnm/frida-il2cpp-bridge/blob/ad0a65f6683e8291b7d00442f0378c200e602385/src/utils/native-wait.ts#L41

How could I discover if there's an alternative export? Or is this a problem with frida?

[vfsfitvnm]

Would you try

Module.findExportByName(null, "dlopen" /*and then */ "android_dlopen_ext")

[Flechaa]

Yes! That works, only problem now is that the game seems to hang after that.

[vfsfitvnm]

Hmm that makes things way harder to debug, I doubt there's anything I can do without having access to the physical device :/

I think I'll just add a setInterval-based function instead of relying on dlopen

[Flechaa]

I am using Android 7 as well, not Android 8.1 as described in the issue.

[vfsfitvnm]

Thanks, I could reproduce. Frida can't hook dlopen :P, hence the crash, let me see what I can do