I don't have a running instance right now, but I think you can get this information from JConsole when you attach it to a running AS7/WildFly instance.
I got the thread dump in jboss cli gui itself.
Should it interest also other users, you can issue from the CLI:
Or just use the command link and standard java tools:
[rhusar@rhusar ~]$ jps -l
[rhusar@rhusar ~]$ jstack 16807