Error on - Copy Frida gadget into app.. RuntimeError: Method invocation of Ljava/lang/Process

[Truewaydm]

Hi, I have a problem with using android-unpinner. Try to find solution, but I don't now what the problem is. Check log error, RuntimeError: Method invocation of Ljava/lang/Process;.waitFor()I failed: java.lang.AbstractMethodError: abstract method "int java.lang.Process.waitFor()". If anyone can hep or have the same problem this topic for you.

Thanks and I'm waiting for someone to help me figure it out.

[GiorgosXou]

@Truewaydm For me, this fixed it. But I won't make a pull request as I don't fully grasp how it should properly get resolved [...] Just edit those lines and you should be fine:

android-unpinner/android_unpinner/jdwplib.py

Lines 320 to 321 in 8b6c350

	exception = resp.data[-self.sizes.object :]
	if exception != b"\x00\x00\x00\x00\x00\x00\x00\x00":

android-unpinner/android_unpinner/jdwplib.py

Lines 338 to 340 in 8b6c350

	assert (
	resp.data[-self.sizes.object :] == b"\x00\x00\x00\x00\x00\x00\x00\x00"
	)

to:

        exception = resp.data[-self.sizes.object :-1]
        if exception != b"\x00\x00\x00\x00\x00\x00\x00":        

and:

            assert (
                resp.data[-self.sizes.object :-1] == b"\x00\x00\x00\x00\x00\x00\x00"
            )

(Here's the proof that it worked for me and) Here's the supposedly, false positive "exceptions":

[03:29:45] Obtain process id...
[03:29:45] Establish Java Debug Wire Protocol Connection over ADB...
[03:29:45] Advance until android.app.Activity.onCreate...
[03:29:51] Copy Frida gadget into app...
[03:29:51] <android_unpinner.jdwplib.JDWPClient object at 0x780906cebf50>
[03:29:51] libgadget.so
[03:29:51] com.instagram.android
b'\x00\x00\x00\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x00\x00\x00\t'
b'\x00\x00\x00\x00\x00\x00\x00\x00'
b'\x00\x00\x00\x00\x00\x00\x00\x0c'
[03:29:51] Inject Frida gadget...
b'\x00\x00\x00\x00\x00\x00\x00\x0e'
[03:29:51] Continue app execution...
[03:29:51] All done! 🎉

Seems like @mhils missed a byte here
^{_{(Sorry for the tag)}}