How does one obtain the pid of the currently debugged process in gdb?

Question

Inside gdb, what command will provide the pid of the process getting debugged?

Most of the google results discuss only how to attach gdb to a process once we know the pid.

score 34 · Accepted Answer · answered Apr 18 '16 at 21:07

34

One simple way is info inferior. Here I'm debugging gdb with itself and this command shows the PID of the debuggee:

(top-gdb) info inferior
  Num  Description       Executable        
* 1    process 14068     /home/tromey/gdb/build/gdb/gdb

You can also just call the ordinary C function:

(top-gdb) print getpid()
$3 = 14068

answered Apr 18 '16 at 21:07

Tom Tromey

Note that the description will be `` if the program is not being run. / Abbreviated as `i i`. – user202729 Jun 24 '18 at 05:18
4

casting is required for getpid "print (int)getpid()" – Talespin_Kit Apr 07 '20 at 08:22

score 4 · Answer 2 · answered Sep 25 '18 at 08:33

4

Another method:

(gdb) python print(gdb.selected_inferior().pid)
32737

answered Sep 25 '18 at 08:33

罗泽轩

score 1 · Answer 3 · answered Jan 11 '23 at 13:45

1

On Linux info proc shows debugged process's pid and some other info

(gdb) info proc
process 28289
cmdline = '...'
cwd = '...'
exe = '...'

answered Jan 11 '23 at 13:45

ten0s

3 Answers3