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Attach to process

Last modified: 14 April 2023

Run | Attach to Process CtrlAltF5

CLion provides a way to attach the debugger to local processes. Attaching to remote processes is not supported at the moment (CPP-14316)

For C/C++ applications, you can attach to a process with GDB or MSVC LLDB on Windows, LLDB on macOS, and both GDB and LLDB on Linux. When applicable, debuggers for other languages (for example, Python debugger) can be used as well.

note

If you want to debug a program that can be started from CLion, the best way to do it is to start a local debugging session.

Prerequisites for Ubuntu users

If you are using CLion on Ubuntu (or probably, on some other Linux distribution), an error message ptrace: Operation not permitted may appear upon your first attempt to attach to a process. In this case, do one of the following:

  1. To disable this restriction temporarily, enter the command: 

    echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope

  2. To disable this restriction permanently, open the /etc/sysctl.d/10-ptrace.conf file for editing and change the line kernel.yama.ptrace_scope = 1 to kernel.yama.ptrace_scope = 0.

    To apply the changes immediately, enter the above command echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope.

    Alternatively, run sudo service procps restart or restart your system.

You can find more details here.

Attach to a local process

Detach from a process

The procedure to detach from a remote process is the same as for stopping a local debug session, however, the effect is different. When you detach, the debugging session closes but the process continues to run.

See also

Reference

External Links