Early hooking on Android

Inizia con android-hook.py e il JavaScript iniettato, quindi esamina le due issue correlate al comportamento di spawn, attach, script loading e RPC lifecycle di Frida. Riproduci la prima chiamata a onResume persa e il caso del Promise distrutto insieme allo script; il lavoro è completato quando l'approccio documentato installa in modo affidabile gli hook iniziali prima di riprendere il processo Android e mantiene in vita lo script.

I'm trying to spawn an Android process and hook all calls to early executing methods like System.loadLibrary and Activity.onResume.
However, either my hooks don't get applied at all, or they get applied too late.

What is the correct way to do this?

My android-hook.py:

import frida
import sys

scriptname = sys.argv[1]
procname = sys.argv[2]
with open(scriptname, "r") as f:
	script_content = f.read()

# define callback function to receive and output messages
# received from server
def on_message(message, data):
	print(message)

device = frida.get_usb_device(1)  # Parameter '1' adds a timeout. Otherwise, frida often raises a frida.TimedOutError
pid = device.spawn([procname])
session = device.attach(pid)
script = session.create_script(script_content)
# setup callback using function defined above
script.on('message', on_message)
# load script into the process
script.load()
# resume process, otherwise nothing will happen
device.resume(pid)
# read from stdin to keep script running
sys.stdin.read()

My injected script:

'use strict';
setImmediate(function() {
    console.log('init')
    Java.perform(function () {
        console.log("hooking");
        var activity = Java.use('de.nioncode.fridasample.MainActivity');
        activity.onResume.implementation = function () {
            send("onResume");
            this.onResume();
        };
        console.log("hooking done");
        send("initialized");
    });
    console.log('init done')
});

This variation performs the hooks too late, thus missing the first 'onResume' call.
I tried to use the rpc mechanism in combination with a Promise to defer the continuation until I call resolve on the Promise. However, this resulted in an frida.InvalidOperationError: script is destroyed error. This was my attempt with the Promise script:

rpc.exports = {
    init: function() {
        console.log('init')
        return new Promise(function(resolve, reject) {
            console.log('init2')
            Java.perform(function () {
                console.log("hooking");
                var activity = Java.use('de.nioncode.antidebug.MainActivity');
                activity.onResume.implementation = function () {
                    send("onResume");
                    this.onResume();
                };
                console.log("hooking done");
                // resolve the Promise, telling Frida to continue executing
                resolve();
            });
            console.log('init2 done')
        });
    }
};

Related to:
https://github.com/frida/frida-python/issues/50
https://github.com/frida/frida/issues/13