I have a simple C program that forks a process and then runs an executable.
I want to attach the child process to gdb.
I run the main program in a console and open another console to find the pid of the child process, then I start gdb with the following command:
gdb attach 12271
where 12271 is the child process id, but the attach fails with:
No such file or directory.
Any idea why?
Try one of these:
gdb -p 12271
gdb /path/to/exe 12271
gdb /path/to/exe
(gdb) attach 12271
With a running instance of myExecutableName having a PID 15073:
hitting Tab twice after $ gdb myExecu in the command line, will automagically autocompletes to:
$ gdb myExecutableName 15073
and will attach gdb to this process. That's nice!
The first argument should be the path to the executable program. So
gdb progname 12271
Source: Stackoverflow.com