Here is how I debug multiple processes on Android.
Start the Android application.
Open DDMS perspective (open Window menu-> Open Perspective -> Other… then select DDMS).
Select the processes I want to debug in the Devices window and click debug icon on the tool bar in the same window. The icon looks like a green bug.
Here is a screenshot.
I am using Eclipse 3.5.1, Android ADT 8.0.1
To debug initialization code, you may want to use Debug.waitForDebugger method.
Find more about Android Debug methods at the official Android Dev Guide site.