How to open "adb shell" in context of application being debugged (on non-rooted device)?

Question

When I just run adb shell, I get shell running from uid=2000(shell) gid=2000(shell), without ptrace access to my application.

How to open a shell with the same UID as launched application?

Answer 1

Use run-as <your package name> to switch to your app's UID or run-as <your package name> <command> to run a single command with your app's UID.

Answer 2

From this answer:

• The packages.xml file present in /data/system
• The packages.list file present in /data/system

Contain the list of applications installed and their corresponding UID's.

Another answer in the same question suggests:

adb shell dumpsys package com.example.myapp | grep userId=

You can then open your shell as normal and run:

$ su <UID>

You should then have the same access and privileges as the app that uses that UID.