Stepping through Code
While examining a suspended program, you get control over the program execution — by manually stepping through the program, you can advance the execution point to the code you are interested in. There are multiple ways of how you can do this described in this section.
The current execution point is the next line to be executed. During debugging, this line is marked with a yellow execution pointer placed in the left-hand gutter of the editor. To quickly find the current execution point, press Alt+NumPad * or click Show Execution Point in the Debug window.
When you need to debug a function called from the current line, you can step down into the call chain with the Step Into command (F11) that is available in the Run menu and in the Debug window.
The debugger will set the execution pointer at the first statement of the first function called from the current line.
By default, JetBrains Rider enables external-source debugging, which means that when you step into the library code it will be automatically decompiled and the debugger will move the execution point there.
If you want the debugger to ignore the library code, you can disable external-source debugging — Clear Enable external source debug on the page of JetBrains Rider settings (Ctrl+Alt+S).
Smart step into
If the current line contains several nested calls, JetBrains Rider lets you choose a call to step into. Consider the following code line:
Console.WriteLine(Foo(Bar("input") + Baz("input")));
Bar(), then into the implementation of
Baz()and so on.
If you want to choose which of the calls should be stepped into, for example,
Bar(), you can use Smart Step Into (Shift+F7):
When you choose the function to step into, the debugger will set the execution pointer at the first statement of the selected function.
The selector also shows you which of the calls were already executed and allows you to execute these calls again.
If you no longer want to debug a function (e.g., the one you've just stepped into), use the Step Out command (Shift+F11) that is available in the Run menu and in the Debug window.
The debugger will execute the remaining lines of the function by itself and set the execution pointer at the statement following the function call.
If you are not interested in how a particular function works, you can skip it over (the function will still be executed) — use the Step Over command (F10) that is available in the Run menu and in the Debug window.
Force step over
If a function you want to step over contains breakpoints, the debugger will stop on those breakpoints if the corresponding statements are executed. You can force the debugger to skip breakpoints inside the call chain with the Force Step Over command (Shift+Alt+F8) that is available in the Run menu and in the Debug window.
Run to cursor
If you know exactly what code you want to inspect, you can tell the debugger to run to a specific statement. The easiest way to do so is to run the program to the current cursor location with the Run to Cursor command (Ctrl+F10) that is available in the Run menu and in the Debug window.
Force run to cursor
If there are breakpoints between the current execution point and the cursor location, you can force the debugger to skip these breakpoints with the Force Run to Cursor command (Ctrl+Alt+F9) that is available in the Run menu.
Breaking into code
While the program runs under the debugger control, you can break its execution at any time. The debugger will stop at the next available line of code.
To break the execution, use the Pause Program command (Ctrl+Pause) that is available in the Run menu.
Changing the execution flow
Sometimes, you may want to skip a part of code without actually executing it (e.g., to avoid a known bug) or to return to a statement that has been already executed. This can be done by forcibly setting the next statement at the current line — use the Set Next Statement command (Ctrl+Shift+F10) that is available in the Run menu.
- Statements between the old and the new execution points are not executed.
- It is impossible to set the next statement in another function.
- When moving backwards, the already executed statements are not undone.
Dragging the execution pointer
To change the execution position, you can move the execution pointer with your mouse, dragging-and-dropping it to another line: