Hi, I am facing some problem with gdb for the past few days.
I want to debug nestloop.c in postgresql , so I followed the below steps. I followed the steps given in the below for collecting the stack trace. https://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_PostgreSQL_backend_on_Linux/BSD 1) I started Postgresql using eclipse using run. 2) I started one client using the following command in bash 3)psql test(Where test is the database and it has the tables student and marks) 4)Then using the command pg_backend_pid(); , I got the pid of the client. 5)In another terminal I started gdb using the command sudo gdb -p pid 6)set pagination off 7)set detach-on-fork off 8)set schedule-multiple on 9)handle SIGUSR1 noprint nostop handle SIGUSR2 noprint nostop 10)python gdb.events.exited.connect(lambda x: [gdb.execute('inferior 1'), gdb.post_event(lambda: gdb.execute('continue'))]) 11)b ExecNestLoop(which is the function in nodenestloop.c) 12)In the client I did a join query, select * from student inner join marks on student.id=marks.id; 13)n But the problem is that the code in nodenestloop.c is not getting executed. could anyone help me with that. Thank you
