elisp: Global Break Condition
17.2.6.2 Global Break Condition
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A “global break condition” stops execution when a specified condition is
satisfied, no matter where that may occur. Edebug evaluates the global
break condition at every stop point; if it evaluates to a non-‘nil’
value, then execution stops or pauses depending on the execution mode,
as if a breakpoint had been hit. If evaluating the condition gets an
error, execution does not stop.
The condition expression is stored in
‘edebug-global-break-condition’. You can specify a new expression using
the ‘X’ command from the source code buffer while Edebug is active, or
using ‘C-x X X’ from any buffer at any time, as long as Edebug is loaded
(‘edebug-set-global-break-condition’).
The global break condition is the simplest way to find where in your
code some event occurs, but it makes code run much more slowly. So you
should reset the condition to ‘nil’ when not using it.
Info Catalog
elisp: Breakpoints
elisp: Breaks
elisp: Source Breakpoints