JetBrains Rider 2020.2 Help

Debug window

When you start a debugger session, the Debug tool window appears. Use this window to control the debugger session, display and analyze the program data (frames, threads, variables, and so on), and perform various debugger actions.

This is a brief overview of the Debug tool window. For general instructions on using tool windows, refer to Tool windows.

JetBrains Rider: Debug window

Sessions

If you run several debug sessions simultaneously, they are separated into tabs in the top part of the Debug tool window.

Session tabs in the Debug window

If you enable Services window for specific run/debug configurations, the entire view of the Debug window will be displayed inside the Services window when you debug any of these configurations.

Debug window inside Services window

All the information like inline variable values and execution point is shown for the selected session tab. This is important if you are running several debug sessions in parallel that use the same code.

Tabs

Debug tool window shows the following tabs for each session:

  • Console: displays the program output.

    For local sessions, the tab works the same as when you just run the program without the debugger attached.

    When you attach to a process, the program output is not redirected and only the debugger output is shown in the debugger console.

  • Debug Output: shows messages sent by your application to the debug output, for example with the Debug.WriteLine() method.

  • Parallel Stacks: shows threads and their stack frames on the diagram.

  • Debugger: lets you explore states of objects in the current execution point of the suspended program.
    The tab is divided into the following panes:

    • Threads and frames on the left let you choose the thread and one of its frames that you want to examine.

    • Variables: displays local variables in the scope of the selected frame. By default, watches are integrated with variables, but you can show watches in a separate pane by clicking Show watches in the variables tab icons.debugger.watch.svg.

  • Memory: provides the information on the currently available objects on the heap and lets you monitor and analyze their lifetime.

Show/hide tabs

  • Click Layout options button and select which tabs you want to see.

Move tabs

You can arrange the tabs to fit your preference. You can move a tab to another location or group a tab with another tab, so that they share the same space on the screen.

  • Drag the tab header to the desired location. The blue frame indicates the destination.

Restore default layout

If you changed the layout of the Debug tool window and don't like the new arrangement, you can revert it to the default state.

  • Click Layout options button in the top-right corner of the Debug tool window, then click Restore Default Layout.

Debug toolbar

Regardless of the selected tab, you can always use the following toolbar controls in the left part of the window:

ItemTooltip and ShortcutDescription
RestartRerun
Ctrl+F5
Click this button to stop the current application and run it again.
ResumeResume Program
F9
When an application is paused, click this button to resume program execution.
PausePause Program
Ctrl+Pause

Click this button to pause program execution.

StopStop
Ctrl+F2
Click this button to terminate the current process .
View breakpointsView Breakpoints
Ctrl+Shift+F8
Click this button to open the Breakpoints dialog where you can configure breakpoints behavior.
Mute breakpointsMute Breakpoints

Use this button to toggle breakpoints status.

You can temporarily mute all the breakpoints in a project to execute the program without stopping at breakpoints.

Show options menuSettings

Click this button to open the menu with the following options:

  • Show Values Inline: select this option to enable the Inline Debugging feature that allows viewing the values of variables right next to their usage in the editor.

  • Sort Values Alphabetically: select this option to sort the values in the Variables pane in the alphabetical order.

  • Unmute Breakpoints on Session Finish: select this option to re-enable all disabled breakpoints after the debugging session has been finished.

icons.general.pin_tab.svgPin Tab Click this button to pin or unpin the current tab. You may need to pin a tab to prevent it from closing automatically when the maximum number of tabs is reached in this window.

Stepping toolbar

ItemTooltip and ShortcutDescription
Show Execution PointShow Execution Point
Alt+F10
Click this button to highlight the current execution point in the editor and show the corresponding stack frame in the Frames pane.
Skip to CursorSkip to Cursor
Ctrl+Alt+Shift+F9

Instead of running the program up to the target statement, you may want to skip a part of code without actually executing it (for example, to avoid a known bug or not to repeat some routine). You can do this with the Skip to Cursor Skip to Cursor command Ctrl+Alt+Shift+F9that is also available in the Run menu and in the Debug window.

You can also skip a part of the program by dragging the execution pointer Execution pointer with your mouse and dropping it to the target line:

JetBrains Rider: Dragging the execution pointer

If Show floating debugger actions is enabled on the Build, Execution, Deployment | Debugger page of JetBrains Rider settings Ctrl+Alt+S , you can hover the mouse over the target statement and then pick the corresponding action:

JetBrains Rider debugger: Setting the next statement with the hover action

Remember the following when you jump to another statement:

  • Statements between the old and the new execution points are not executed.

  • You can jump back, that is to a statement that was already executed. In this case the already executed statements are not undone.

  • It is impossible to set the next statement in another function.

Step overStep Over
F8
Click this button to execute the program until the next line in the current method or file, skipping the methods referenced at the current execution point (if any). If the current line is the last one in the method, execution steps to the line executed right after this method.
${iconAlt}Force Step Over
Alt+Shift+F8
Click this button to have the debugger step over the method even if this method has breakpoints inside.
Step intoStep Into
F7

Click this button to have the debugger step into the method called at the current execution point.

The debugger will set the execution pointer at the first statement of the first function called from the current line. If no function is called, then the debugger will step to the next statement.

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 Build, Execution, Deployment | Debugger page of JetBrains Rider settings Ctrl+Alt+S.

Smart step intoSmart Step Into
Shift+F7

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")));
The line contains several calls and if you use Step Into, the debugger will first step into the implementation of 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 Smart Step Into Shift+F7:

JetBrains Rider: Smart step into - stepping into selected call

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.

You can enable the 'smart step into' behavior when you invoke Step Into F7 in a line that contains multiple method calls. To do so, select Always do smart step into on the Build, Execution, Deployment | Debugger | Stepping page of the Settings/Preferences Ctrl+Alt+S.

Step outStep Out
Shift+F8
Click this button to have the debugger step out of the current method, to the line executed right after it.
Run to cursor Run to Cursor
Alt+F9

Click this button to resume program execution and pause until the execution point reaches the line at the current cursor location in the editor. No breakpoint is required. Actually, there is a temporary breakpoint set for the current line at the caret, which is removed once program execution is paused. Thus, if the caret is positioned at the line which has already been executed, the program will be just resumed for further execution, because there is no way to roll back to previous breakpoints. This action is especially useful when you have stepped deep into the methods sequence and need to step out of several methods at once.

If there are breakpoints set for the lines that should be executed before bringing you to the specified line, the debugger will pause at the first encountered breakpoint.

If Show floating debugger actions is enabled on the Build, Execution, Deployment | Debugger page of JetBrains Rider settings Ctrl+Alt+S , you can hover the mouse over the target statement and then pick the corresponding action:

JetBrains Rider debugger: Run to cursor with the hover action

If line numbers are displayed in the editor, and Click line number to perform run to cursor is enabled on the Build, Execution, Deployment | Debugger page of JetBrains Rider settings Ctrl+Alt+S , you can run to this line by clicking its line number.

JetBrains Rider debugger: Run to cursor using the line number
${iconAlt} Run to Cursor Non-Stop
Ctrl+Alt+F9
If there are breakpoints between the current execution point and the target statement, you can force the debugger to skip these breakpoints with the Run to Cursor Non-Stop Run to Cursor Non-Stop command Ctrl+Alt+F9.
Evaluate expressionEvaluate Expression
Alt+F8
Click this button to evaluate expressions. .
Last modified: 15 October 2020