How do I get thread_info for a given pid? Is there a way to modify PC of thread A in thread B so once thread A is scheduled, it will jump to the new instruction?

Any help is appreciated! Thanks in advance!

sAir

Yes, there are plenty of ways to get OS-level info about a thread or process. Reading "/proc" or learning "gdb" are two particularly good choices:

http://www.linuxjournal.com/article/8381
http://www.linux.com/archive/feature/126718

And yes, there are plenty of ways to control the behavior of a thread or process; either within the process, or from other processes on the system (or, of course, even from remote hosts).

But you want to go for the *highest* level of abstraction (e.g. set a shared variable, or create a new class instance). You *don't* want to muck around with low-level constructs like Program Counters or stack frames.

IMHO .. PSM

Thanks paulsm4,

I see we can get the thread_info or task_struct for current thread, but I did not find how to get these for a given pid. Could you point me the api that I can use?

Thanks again.

sAir