Debugging
Start a debugging session
-
Configure the Run/Debug Configurations profile (). For more information, see Configuring Debugger Options.
Choose the desired CMake profile.
Define a run/debug configuration for the application to be debugged.
Create a breakpoint. To create a breakpoint, select the code line that you want to examine and click an area in the gutter near the line number.
Click the Debug icon (
). Read more about debugging sessions in Starting the Debugger Session.
After you've started a debug session, the 
icon that marks the Debug tool window toggles to 
to indicate that the debug process is active.
Debug
After you have configured a run configuration for your project, you can launch it in debug mode by pressing Shift+F9.
In the Debug tool window you can see the list of frames and threads with their states, variables and watches. When you select a frame, you see the variables corresponding to the selected frame.
Breakpoints
Customize breakpoint settings
To customize breakpoint settings, press Ctrl+Shift+F8. To see all breakpoints in the project (with additional settings), click More or press the same shortcut Ctrl+Shift+F8 again.
Do not suspend code execution
Use action breakpoints to evaluate a variable at a particular line of code without suspending code execution. To create an action breakpoint, click the gutter while pressing Shift.
Create a temporary breakpoint
To create a breakpoint that stops only once, click the left gutter while holding Shift+Alt. For more information, refer to the section Breakpoint types.
Disable breakpoints
To disable a breakpoint, click the breakpoint while pressing Alt. Refer to the section Enabling, Disabling and Removing Breakpoints for details.
Debugger session
Run to cursor
To stop code execution at the cursor position without adding another breakpoint, click the Run to cursor icon(
) or press Alt+F9.
The icon is described in the toolbar reference of the Debug tool window.
Evaluate expression
While in debug mode, you can evaluate any expression by pressing Alt+F8.
This tool provides code completion just as in the editor so it’s very easy to enter any expression:
Refer to the section Evaluating Expressions for details.
Remote debug
The final thing you definitely should know about debugging in CLion is Remote debug. Remote debug means attaching debugger to a process which is already running on a specific port on your or any other’s host. This way you can attach the debugger to your application server which is running standalone.
To create a remote configuration, go to Edit configurations and add a new GDB Remote Debug configuration. Make sure to specify the correct host and port before running this configuration.
Settings
Configuring debugger settings
To change debugger settings, click . In the Settings menu, click .
Useful debugger shortcuts
Action | Hotkey |
|---|---|
| Toggle breakpoint | Ctrl+F8 |
| Resume program | F9 |
| Step over | F8 |
| Step into | F7 |
Stop | Ctrl+F2 |
| View breakpoint details/all breakpoints | Ctrl+Shift+F8 |
Debug code at caret | Shift+F9 (within the main method), or Shift+Alt+F9 |