Attaching to Local Process
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Currently in CLion you can attach to local process with GDB on Windows and Linux or LLDB on macOS for the C/C++ applications and Python debugger for the Python scripts and use all the debugging instruments available in CLion.
Prerequisites for Ubuntu users
If you are using CLion on Ubuntu (or probably, on some other Linux distribution), upon the first attempt to attach to the local process you can get the
ptrace: Operation not permitted. error message. To disable it and enable attach to the local process feature, do the following:
- To disable this restriction temporarily, enter the command:
echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
- To disable this restriction permanently, open the file
/etc/sysctl.d/10-ptrace.conffor editing and change the line
kernel.yama.ptrace_scope = 1to
kernel.yama.ptrace_scope = 0. To apply the changes, enter
sudo service procps restartor restart your system, at your choice.
You can find more details here.
Attaching to local process
To attach to a local process, follow these general steps:
- Launch the process intended for debugging. You can do it from operating system or using the CLion terminal.
- To find the process to attach to, do one of the following:
- From the list of available processes that appears, select the desired process. Simplify your search by typing the first letters of its name or PID or for a Python script:
- Proceed with debugging the same way as you usually do it in CLion (set breakpoints, step through, pause and resume the process, evaluate expressions etc.)
- When finished, detach the process: select the or click the Stop the process button of the Debug Tool Window.