Emulator hang when track_by_pid about decaf-platform HOT 2 OPEN

In the wiki page for DroidScope, it seems that we should use 32-bit OS to build 
it. But when building the Android from source, it will prompt that the Android 
source must be built on a 64-bit OS. There're many resource on the Internet 
telling how to build Android on a 32-bit OS. Should I apply them to build it on 
a 32-bit system? Or, should I build it on a 64-bit OS instead?

In the wiki page, it says that we should use Android Gingerbread. Could you 
tell me the exact version number I should use? (2.3.?)

I'm trying to figure out whether the problem I reported is the result of my 
incorrect environment.

Sorry that I should have posted the problem at the forum.
This issue can be ignored or deleted.