Setting a stop Breakpoint at a Line of Source Code

You can set a breakpoint at a line number, using the dbx stop at command:

(dbx) stop at filename:
 n

where n is a source code line number and filename is an optional program file name qualifier. For example

(dbx)stop at main.cc:3

If the line specified in a stop or when command is not an executable line of source code, dbx sets the breakpoint at the next executable line.