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Outside Window Configuration

When Edebug needs to display something (e.g., in trace mode), it saves the current window configuration from "outside" Edebug (see section Window Configurations). When you exit Edebug (by continuing the program), it restores the previous window configuration.

Emacs redisplays only when it pauses. Usually, when you continue Edebug, the program comes back into Edebug at a breakpoint or after stepping, without pausing or reading input in between. In such cases, Emacs never gets a chance to redisplay the "outside" configuration. What you see is the window configuration for within Edebug, with no interruption.

The window configuration proper does not include which buffer is current or where point and mark are in the current buffer, but Edebug saves and restores these also.

Entry to Edebug for displaying something also saves and restores the following data. (Some of these variables are deliberately not restored if an error or quit signal occurs.)

• The position of point in the Edebug buffer is saved and restored if the outside current buffer is the same as the Edebug buffer.

• The outside window configuration, as described above, is saved and restored if edebug-save-windows is non-nil.

• The current buffer, and point and mark in the current buffer are normally saved and restored even if the current buffer is the same as the Edebug buffer.

• The value of point in each displayed buffers is saved and restored if edebug-save-displayed-buffer-points is non-nil.

• The variables overlay-arrow-position and overlay-arrow-string are saved and restored. This permits recursive use of Edebug, and use of Edebug while using GUD.

• cursor-in-echo-area is locally bound to nil so that the cursor shows up in the window.

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