Oracle Database Discussions

I had a doubt related to how to find the contents of a procedure or the statements from the PID displayed in top command if it can be done from TOAD or sqlplus. If we can find out the details from top like:-

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21211 oracle 16 0 3228 1012 764 R 0 0.0 0:07.68 top
1 root 16 0 1732 552 472 S 0 0.0 0:01.29 init
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say, what is the process with PID 21211 and 1 are doing?

I hope, my question is clear.

Please, help in solving the doubt.

regards