Debug in Emacs
This is a note on debugging in Emacs.
1 debug
debug-on-entry- enter the debugger when a function is called
cancel-debug-on-entry- As the name suggests
toggle-debug-on-error- whether to enter the debugger if an error occurs
When you are in the debugger, you have following commands for use:
c |
continue, but don’t stop next time. |
d |
continue and enter the debugger again next time. |
e |
evaluate expressions (better than
M-:). |
r |
return a value from debugger. |
l |
list functions that will enter the debugger. |
b |
flag the current frame so we will enter debugger again when the frame exits. |
2 edebug
edebug-defun/C-u eval-defun- instrument function to enter stepper when the function
runs. To cancel the instrument, simply use
eval-defunto reevaluate the function normally.
Some common commands in edebug:
n |
step |
q |
quit |
r |
re-display last value in echo area |
b |
set break point, use C-u
to set a one-time break point |
x |
set break condition |
c |
continue |