(require 'button)
(defgroup debugger nil
"Debuggers and related commands for Emacs."
:prefix "debugger-"
:group 'debug)
(defcustom debugger-mode-hook nil
"*Hooks run when `debugger-mode' is turned on."
:type 'hook
:group 'debugger
:version "20.3")
(defcustom debugger-batch-max-lines 40
"*Maximum lines to show in debugger buffer in a noninteractive Emacs.
When the debugger is entered and Emacs is running in batch mode,
if the backtrace text has more than this many lines,
the middle is discarded, and just the beginning and end are displayed."
:type 'integer
:group 'debugger
:version "21.1")
(defvar debug-function-list nil
"List of functions currently set for debug on entry.")
(defvar debugger-step-after-exit nil
"Non-nil means \"single-step\" after the debugger exits.")
(defvar debugger-value nil
"This is the value for the debugger to return, when it returns.")
(defvar debugger-old-buffer nil
"This is the buffer that was current when the debugger was entered.")
(defvar debugger-previous-backtrace nil
"The contents of the previous backtrace (including text properties).
This is to optimize `debugger-make-xrefs'.")
(defvar debugger-outer-match-data)
(defvar debugger-outer-load-read-function)
(defvar debugger-outer-overriding-local-map)
(defvar debugger-outer-overriding-terminal-local-map)
(defvar debugger-outer-track-mouse)
(defvar debugger-outer-last-command)
(defvar debugger-outer-this-command)
(defvar debugger-outer-unread-command-char)
(defvar debugger-outer-unread-command-events)
(defvar debugger-outer-unread-post-input-method-events)
(defvar debugger-outer-last-input-event)
(defvar debugger-outer-last-command-event)
(defvar debugger-outer-last-nonmenu-event)
(defvar debugger-outer-last-event-frame)
(defvar debugger-outer-standard-input)
(defvar debugger-outer-standard-output)
(defvar debugger-outer-inhibit-redisplay)
(defvar debugger-outer-cursor-in-echo-area)
(defvar debugger-will-be-back nil
"Non-nil if we expect to get back in the debugger soon.")
(defvar inhibit-debug-on-entry nil
"Non-nil means that debug-on-entry is disabled.")
(defvar debugger-jumping-flag nil
"Non-nil means that debug-on-entry is disabled.
This variable is used by `debugger-jump', `debugger-step-through',
and `debugger-reenable' to temporarily disable debug-on-entry.")
(defvar inhibit-trace)
(setq debugger 'debug)
(defun debug (&rest debugger-args)
"Enter debugger. To return, type \\<debugger-mode-map>`\\[debugger-continue]'.
Arguments are mainly for use when this is called from the internals
of the evaluator.
You may call with no args, or you may pass nil as the first arg and
any other args you like. In that case, the list of args after the
first will be printed into the backtrace buffer."
(interactive)
(if inhibit-redisplay
debugger-value
(unless noninteractive
(message "Entering debugger..."))
(let (debugger-value
(debug-on-error nil)
(debug-on-quit nil)
(debugger-buffer (let ((default-major-mode 'fundamental-mode))
(get-buffer-create "*Backtrace*")))
(debugger-old-buffer (current-buffer))
(debugger-step-after-exit nil)
(debugger-will-be-back nil)
(executing-kbd-macro nil)
(debugger-outer-match-data (match-data))
(debugger-outer-load-read-function load-read-function)
(debugger-outer-overriding-local-map overriding-local-map)
(debugger-outer-overriding-terminal-local-map
overriding-terminal-local-map)
(debugger-outer-track-mouse track-mouse)
(debugger-outer-last-command last-command)
(debugger-outer-this-command this-command)
(debugger-outer-unread-command-char
(with-no-warnings unread-command-char))
(debugger-outer-unread-command-events unread-command-events)
(debugger-outer-unread-post-input-method-events
unread-post-input-method-events)
(debugger-outer-last-input-event last-input-event)
(debugger-outer-last-command-event last-command-event)
(debugger-outer-last-nonmenu-event last-nonmenu-event)
(debugger-outer-last-event-frame last-event-frame)
(debugger-outer-standard-input standard-input)
(debugger-outer-standard-output standard-output)
(debugger-outer-inhibit-redisplay inhibit-redisplay)
(debugger-outer-cursor-in-echo-area cursor-in-echo-area)
(debugger-with-timeout-suspend (with-timeout-suspend)))
(setq overriding-terminal-local-map nil)
(let ((last-command nil) this-command track-mouse
(inhibit-trace t)
(inhibit-debug-on-entry t)
unread-command-events
unread-post-input-method-events
last-input-event last-command-event last-nonmenu-event
last-event-frame
overriding-local-map
load-read-function
(enable-recursive-minibuffers
(or enable-recursive-minibuffers (> (minibuffer-depth) 0)))
(standard-input t) (standard-output t)
inhibit-redisplay
(cursor-in-echo-area nil))
(unwind-protect
(save-excursion
(save-window-excursion
(with-no-warnings
(setq unread-command-char -1))
(when (eq (car debugger-args) 'debug)
(backtrace-debug 4 t)
(when (eq 'lambda (car-safe (cadr (backtrace-frame 4))))
(backtrace-debug 5 t)))
(pop-to-buffer debugger-buffer)
(debugger-mode)
(debugger-setup-buffer debugger-args)
(when noninteractive
(when (> (count-lines (point-min) (point-max))
debugger-batch-max-lines)
(goto-char (point-min))
(forward-line (/ 2 debugger-batch-max-lines))
(let ((middlestart (point)))
(goto-char (point-max))
(forward-line (- (/ 2 debugger-batch-max-lines)
debugger-batch-max-lines))
(delete-region middlestart (point)))
(insert "...\n"))
(goto-char (point-min))
(message "%s" (buffer-string))
(kill-emacs))
(message "")
(let ((standard-output nil)
(buffer-read-only t))
(message "")
(save-excursion
(recursive-edit)))))
(if (get-buffer-window debugger-buffer 0)
(with-current-buffer debugger-buffer
(erase-buffer)
(fundamental-mode)
(with-selected-window (get-buffer-window debugger-buffer 0)
(when (and (window-dedicated-p (selected-window))
(not debugger-will-be-back))
(quit-window))))
(kill-buffer debugger-buffer))
(with-timeout-unsuspend debugger-with-timeout-suspend)
(set-match-data debugger-outer-match-data)))
(setq load-read-function debugger-outer-load-read-function)
(setq overriding-local-map debugger-outer-overriding-local-map)
(setq overriding-terminal-local-map
debugger-outer-overriding-terminal-local-map)
(setq track-mouse debugger-outer-track-mouse)
(setq last-command debugger-outer-last-command)
(setq this-command debugger-outer-this-command)
(with-no-warnings
(setq unread-command-char debugger-outer-unread-command-char))
(setq unread-command-events debugger-outer-unread-command-events)
(setq unread-post-input-method-events
debugger-outer-unread-post-input-method-events)
(setq last-input-event debugger-outer-last-input-event)
(setq last-command-event debugger-outer-last-command-event)
(setq last-nonmenu-event debugger-outer-last-nonmenu-event)
(setq last-event-frame debugger-outer-last-event-frame)
(setq standard-input debugger-outer-standard-input)
(setq standard-output debugger-outer-standard-output)
(setq inhibit-redisplay debugger-outer-inhibit-redisplay)
(setq cursor-in-echo-area debugger-outer-cursor-in-echo-area)
(setq debug-on-next-call debugger-step-after-exit)
debugger-value)))
(defun debugger-setup-buffer (debugger-args)
"Initialize the `*Backtrace*' buffer for entry to the debugger.
That buffer should be current already."
(setq buffer-read-only nil)
(erase-buffer)
(set-buffer-multibyte nil)
(let ((standard-output (current-buffer))
(print-escape-newlines t)
(print-level 8)
(print-length 50))
(backtrace))
(goto-char (point-min))
(delete-region (point)
(progn
(search-forward "\n debug(")
(forward-line (if (eq (car debugger-args) 'debug)
2 1))
(point)))
(insert "Debugger entered")
(cond ((memq (car debugger-args) '(lambda debug))
(insert "--entering a function:\n"))
((eq (car debugger-args) 'exit)
(insert "--returning value: ")
(setq debugger-value (nth 1 debugger-args))
(prin1 debugger-value (current-buffer))
(insert ?\n)
(delete-char 1)
(insert ? )
(beginning-of-line))
((eq (car debugger-args) 'error)
(insert "--Lisp error: ")
(prin1 (nth 1 debugger-args) (current-buffer))
(insert ?\n))
((eq (car debugger-args) t)
(insert "--beginning evaluation of function call form:\n"))
(t
(insert ": ")
(prin1 (if (eq (car debugger-args) 'nil)
(cdr debugger-args) debugger-args)
(current-buffer))
(insert ?\n)))
(save-excursion
(let ((tem eval-buffer-list))
(while (and tem
(re-search-forward "^ eval-\\(buffer\\|region\\)(" nil t))
(end-of-line)
(insert (format " ; Reading at buffer position %d"
(with-current-buffer (car tem)
(point))))
(pop tem))))
(debugger-make-xrefs))
(defun debugger-make-xrefs (&optional buffer)
"Attach cross-references to function names in the `*Backtrace*' buffer."
(interactive "b")
(save-excursion
(set-buffer (or buffer (current-buffer)))
(setq buffer (current-buffer))
(let ((inhibit-read-only t)
(old-end (point-min)) (new-end (point-min)))
(if debugger-previous-backtrace
(let (old-start new-start (all-match t))
(goto-char (point-max))
(with-temp-buffer
(insert debugger-previous-backtrace)
(while (and all-match (not (bobp)))
(setq old-end (point))
(forward-line -1)
(setq old-start (point))
(with-current-buffer buffer
(setq new-end (point))
(forward-line -1)
(setq new-start (point)))
(if (not (zerop
(let ((case-fold-search nil))
(compare-buffer-substrings
(current-buffer) old-start old-end
buffer new-start new-end))))
(setq all-match nil))))
(delete-region new-end (point-max))
(goto-char (point-max))
(insert (substring debugger-previous-backtrace
(- old-end (point-min))))
(narrow-to-region (point-min) new-end)))
(goto-char (point-min))
(while (progn
(goto-char (+ (point) 2))
(skip-syntax-forward "^w_")
(not (eobp)))
(let* ((beg (point))
(end (progn (skip-syntax-forward "w_") (point)))
(sym (intern-soft (buffer-substring-no-properties
beg end)))
(file (and sym (symbol-file sym 'defun))))
(when file
(goto-char beg)
(re-search-forward "\\(\\sw\\|\\s_\\)+")
(help-xref-button 0 'help-function-def sym file)))
(forward-line 1))
(widen))
(setq debugger-previous-backtrace (buffer-string))))
(defun debugger-step-through ()
"Proceed, stepping through subexpressions of this expression.
Enter another debugger on next entry to eval, apply or funcall."
(interactive)
(setq debugger-step-after-exit t)
(setq debugger-jumping-flag t)
(setq debugger-will-be-back t)
(add-hook 'post-command-hook 'debugger-reenable)
(message "Proceeding, will debug on next eval or call.")
(exit-recursive-edit))
(defun debugger-continue ()
"Continue, evaluating this expression without stopping."
(interactive)
(unless debugger-may-continue
(error "Cannot continue"))
(message "Continuing.")
(save-excursion
(goto-char (point-min))
(if (re-search-forward "^\\* " nil t)
(setq debugger-will-be-back t)))
(exit-recursive-edit))
(defun debugger-return-value (val)
"Continue, specifying value to return.
This is only useful when the value returned from the debugger
will be used, such as in a debug on exit from a frame."
(interactive "XReturn value (evaluated): ")
(setq debugger-value val)
(princ "Returning " t)
(prin1 debugger-value)
(save-excursion
(goto-char (point-min))
(if (re-search-forward "^\\* " nil t)
(setq debugger-will-be-back t)))
(exit-recursive-edit))
(defun debugger-jump ()
"Continue to exit from this frame, with all debug-on-entry suspended."
(interactive)
(debugger-frame)
(setq debugger-jumping-flag t)
(add-hook 'post-command-hook 'debugger-reenable)
(message "Continuing through this frame")
(setq debugger-will-be-back t)
(exit-recursive-edit))
(defun debugger-reenable ()
"Turn all debug-on-entry functions back on.
This function is put on `post-command-hook' by `debugger-jump' and
removes itself from that hook."
(setq debugger-jumping-flag nil)
(remove-hook 'post-command-hook 'debugger-reenable))
(defun debugger-frame-number ()
"Return number of frames in backtrace before the one point points at."
(save-excursion
(beginning-of-line)
(let ((opoint (point))
(count 0))
(while (not (eq (cadr (backtrace-frame count)) 'debug))
(setq count (1+ count)))
(when (eq 'implement-debug-on-entry (cadr (backtrace-frame (1+ count))))
(setq count (1+ count)))
(goto-char (point-min))
(when (looking-at "Debugger entered--\\(Lisp error\\|returning value\\):")
(goto-char (match-end 0))
(forward-sexp 1))
(forward-line 1)
(while (progn
(forward-char 2)
(if (= (following-char) ?\()
(forward-sexp 1)
(forward-sexp 2))
(forward-line 1)
(<= (point) opoint))
(if (looking-at " *;;;")
(forward-line 1))
(setq count (1+ count)))
count)))
(defun debugger-frame ()
"Request entry to debugger when this frame exits.
Applies to the frame whose line point is on in the backtrace."
(interactive)
(save-excursion
(beginning-of-line)
(if (looking-at " *;;;\\|[a-z]")
(error "This line is not a function call")))
(beginning-of-line)
(backtrace-debug (debugger-frame-number) t)
(if (= (following-char) ? )
(let ((inhibit-read-only t))
(delete-char 1)
(insert ?*)))
(beginning-of-line))
(defun debugger-frame-clear ()
"Do not enter debugger when this frame exits.
Applies to the frame whose line point is on in the backtrace."
(interactive)
(save-excursion
(beginning-of-line)
(if (looking-at " *;;;\\|[a-z]")
(error "This line is not a function call")))
(beginning-of-line)
(backtrace-debug (debugger-frame-number) nil)
(if (= (following-char) ?*)
(let ((inhibit-read-only t))
(delete-char 1)
(insert ? )))
(beginning-of-line))
(put 'debugger-env-macro 'lisp-indent-function 0)
(defmacro debugger-env-macro (&rest body)
"Run BODY in original environment."
`(save-excursion
(if (null (buffer-name debugger-old-buffer))
(setq debugger-old-buffer (current-buffer)))
(set-buffer debugger-old-buffer)
(let ((load-read-function debugger-outer-load-read-function)
(overriding-terminal-local-map
debugger-outer-overriding-terminal-local-map)
(overriding-local-map debugger-outer-overriding-local-map)
(track-mouse debugger-outer-track-mouse)
(last-command debugger-outer-last-command)
(this-command debugger-outer-this-command)
(unread-command-events debugger-outer-unread-command-events)
(unread-post-input-method-events
debugger-outer-unread-post-input-method-events)
(last-input-event debugger-outer-last-input-event)
(last-command-event debugger-outer-last-command-event)
(last-nonmenu-event debugger-outer-last-nonmenu-event)
(last-event-frame debugger-outer-last-event-frame)
(standard-input debugger-outer-standard-input)
(standard-output debugger-outer-standard-output)
(inhibit-redisplay debugger-outer-inhibit-redisplay)
(cursor-in-echo-area debugger-outer-cursor-in-echo-area))
(set-match-data debugger-outer-match-data)
(prog1
(let ((save-ucc (with-no-warnings unread-command-char)))
(unwind-protect
(progn
(with-no-warnings
(setq unread-command-char debugger-outer-unread-command-char))
(prog1 (progn ,@body)
(with-no-warnings
(setq debugger-outer-unread-command-char unread-command-char))))
(with-no-warnings
(setq unread-command-char save-ucc))))
(setq debugger-outer-match-data (match-data))
(setq debugger-outer-load-read-function load-read-function)
(setq debugger-outer-overriding-terminal-local-map
overriding-terminal-local-map)
(setq debugger-outer-overriding-local-map overriding-local-map)
(setq debugger-outer-track-mouse track-mouse)
(setq debugger-outer-last-command last-command)
(setq debugger-outer-this-command this-command)
(setq debugger-outer-unread-command-events unread-command-events)
(setq debugger-outer-unread-post-input-method-events
unread-post-input-method-events)
(setq debugger-outer-last-input-event last-input-event)
(setq debugger-outer-last-command-event last-command-event)
(setq debugger-outer-last-nonmenu-event last-nonmenu-event)
(setq debugger-outer-last-event-frame last-event-frame)
(setq debugger-outer-standard-input standard-input)
(setq debugger-outer-standard-output standard-output)
(setq debugger-outer-inhibit-redisplay inhibit-redisplay)
(setq debugger-outer-cursor-in-echo-area cursor-in-echo-area)
))))
(defun debugger-eval-expression (exp)
"Eval an expression, in an environment like that outside the debugger."
(interactive
(list (read-from-minibuffer "Eval: "
nil read-expression-map t
'read-expression-history)))
(debugger-env-macro (eval-expression exp)))
(defvar debugger-mode-map
(let ((map (make-keymap)))
(set-keymap-parent map button-buffer-map)
(suppress-keymap map)
(define-key map "-" 'negative-argument)
(define-key map "b" 'debugger-frame)
(define-key map "c" 'debugger-continue)
(define-key map "j" 'debugger-jump)
(define-key map "r" 'debugger-return-value)
(define-key map "u" 'debugger-frame-clear)
(define-key map "d" 'debugger-step-through)
(define-key map "l" 'debugger-list-functions)
(define-key map "h" 'describe-mode)
(define-key map "q" 'top-level)
(define-key map "e" 'debugger-eval-expression)
(define-key map " " 'next-line)
(define-key map "R" 'debugger-record-expression)
(define-key map "\C-m" 'debug-help-follow)
(define-key map [mouse-2] 'push-button)
map))
(put 'debugger-mode 'mode-class 'special)
(defun debugger-mode ()
"Mode for backtrace buffers, selected in debugger.
\\<debugger-mode-map>
A line starts with `*' if exiting that frame will call the debugger.
Type \\[debugger-frame] or \\[debugger-frame-clear] to set or remove the `*'.
When in debugger due to frame being exited,
use the \\[debugger-return-value] command to override the value
being returned from that frame.
Use \\[debug-on-entry] and \\[cancel-debug-on-entry] to control
which functions will enter the debugger when called.
Complete list of commands:
\\{debugger-mode-map}"
(kill-all-local-variables)
(setq major-mode 'debugger-mode)
(setq mode-name "Debugger")
(setq truncate-lines t)
(set-syntax-table emacs-lisp-mode-syntax-table)
(use-local-map debugger-mode-map)
(run-mode-hooks 'debugger-mode-hook))
(defcustom debugger-record-buffer "*Debugger-record*"
"*Buffer name for expression values, for \\[debugger-record-expression]."
:type 'string
:group 'debugger
:version "20.3")
(defun debugger-record-expression (exp)
"Display a variable's value and record it in `*Backtrace-record*' buffer."
(interactive
(list (read-from-minibuffer
"Record Eval: "
nil
read-expression-map t
'read-expression-history)))
(let* ((buffer (get-buffer-create debugger-record-buffer))
(standard-output buffer))
(princ (format "Debugger Eval (%s): " exp))
(princ (debugger-eval-expression exp))
(terpri))
(with-current-buffer (get-buffer debugger-record-buffer)
(message "%s"
(buffer-substring (line-beginning-position 0)
(line-end-position 0)))))
(defun debug-help-follow (&optional pos)
"Follow cross-reference at POS, defaulting to point.
For the cross-reference format, see `help-make-xrefs'."
(interactive "d")
(require 'help-mode)
(unless pos
(setq pos (point)))
(unless (push-button pos)
(let ((sym
(intern
(save-excursion
(goto-char pos) (skip-syntax-backward "w_")
(buffer-substring (point)
(progn (skip-syntax-forward "w_")
(point)))))))
(when (or (boundp sym) (fboundp sym) (facep sym))
(help-xref-interned sym)))))
(defun implement-debug-on-entry ()
"Conditionally call the debugger.
A call to this function is inserted by `debug-on-entry' to cause
functions to break on entry."
(if (or inhibit-debug-on-entry debugger-jumping-flag)
nil
(funcall debugger 'debug)))
(defun debugger-special-form-p (symbol)
"Return whether SYMBOL is a special form."
(and (fboundp symbol)
(subrp (symbol-function symbol))
(eq (cdr (subr-arity (symbol-function symbol))) 'unevalled)))
(defun debug-on-entry (function)
"Request FUNCTION to invoke debugger each time it is called.
When called interactively, prompt for FUNCTION in the minibuffer.
This works by modifying the definition of FUNCTION. If you tell the
debugger to continue, FUNCTION's execution proceeds. If FUNCTION is a
normal function or a macro written in Lisp, you can also step through
its execution. FUNCTION can also be a primitive that is not a special
form, in which case stepping is not possible. Break-on-entry for
primitive functions only works when that function is called from Lisp.
Use \\[cancel-debug-on-entry] to cancel the effect of this command.
Redefining FUNCTION also cancels it."
(interactive
(let ((fn (function-called-at-point)) val)
(when (debugger-special-form-p fn)
(setq fn nil))
(setq val (completing-read
(if fn
(format "Debug on entry to function (default %s): " fn)
"Debug on entry to function: ")
obarray
#'(lambda (symbol)
(and (fboundp symbol)
(not (debugger-special-form-p symbol))))
t nil nil (symbol-name fn)))
(list (if (equal val "") fn (intern val)))))
(when (debugger-special-form-p function)
(error "Function %s is a special form" function))
(if (or (symbolp (symbol-function function))
(subrp (symbol-function function)))
(fset function `(lambda (&rest debug-on-entry-args)
,(interactive-form (symbol-function function))
(apply ',(symbol-function function)
debug-on-entry-args)))
(when (eq (car-safe (symbol-function function)) 'autoload)
(load (cadr (symbol-function function)) nil noninteractive nil t))
(when (or (not (consp (symbol-function function)))
(and (eq (car (symbol-function function)) 'macro)
(not (consp (cdr (symbol-function function))))))
(debug-convert-byte-code function)))
(unless (consp (symbol-function function))
(error "Definition of %s is not a list" function))
(fset function (debug-on-entry-1 function t))
(unless (memq function debug-function-list)
(push function debug-function-list))
function)
(defun cancel-debug-on-entry (&optional function)
"Undo effect of \\[debug-on-entry] on FUNCTION.
If FUNCTION is nil, cancel debug-on-entry for all functions.
When called interactively, prompt for FUNCTION in the minibuffer.
To specify a nil argument interactively, exit with an empty minibuffer."
(interactive
(list (let ((name
(completing-read
"Cancel debug on entry to function (default all functions): "
(mapcar 'symbol-name debug-function-list) nil t)))
(when name
(unless (string= name "")
(intern name))))))
(if (and function
(not (string= function ""))) (progn
(let ((defn (debug-on-entry-1 function nil)))
(condition-case nil
(when (and (equal (nth 1 defn) '(&rest debug-on-entry-args))
(eq (car (nth 3 defn)) 'apply))
(setq defn (nth 1 (nth 1 (nth 3 defn)))))
(error nil))
(fset function defn))
(setq debug-function-list (delq function debug-function-list))
function)
(message "Cancelling debug-on-entry for all functions")
(mapcar 'cancel-debug-on-entry debug-function-list)))
(defun debug-convert-byte-code (function)
(let* ((defn (symbol-function function))
(macro (eq (car-safe defn) 'macro)))
(when macro (setq defn (cdr defn)))
(unless (consp defn)
(let* ((contents (append defn nil))
(body
(list (list 'byte-code (nth 1 contents)
(nth 2 contents) (nth 3 contents)))))
(if (nthcdr 5 contents)
(setq body (cons (list 'interactive (nth 5 contents)) body)))
(if (nth 4 contents)
(setq body (cons (documentation function) body)))
(setq defn (cons 'lambda (cons (car contents) body))))
(when macro (setq defn (cons 'macro defn)))
(fset function defn))))
(defun debug-on-entry-1 (function flag)
(let* ((defn (symbol-function function))
(tail defn))
(when (eq (car-safe tail) 'macro)
(setq tail (cdr tail)))
(if (not (eq (car-safe tail) 'lambda))
(when flag
(error "%s is not a user-defined Lisp function" function))
(setq tail (cdr tail))
(when (and (stringp (cadr tail)) (cddr tail))
(setq tail (cdr tail)))
(when (eq 'interactive (car-safe (cadr tail)))
(setq tail (cdr tail)))
(unless (eq flag (equal (cadr tail) '(implement-debug-on-entry)))
(if flag
(setcdr tail (cons '(implement-debug-on-entry) (cdr tail)))
(setcdr tail (cddr tail)))))
defn))
(defun debugger-list-functions ()
"Display a list of all the functions now set to debug on entry."
(interactive)
(require 'help-mode)
(help-setup-xref '(debugger-list-functions) (interactive-p))
(with-output-to-temp-buffer (help-buffer)
(with-current-buffer standard-output
(if (null debug-function-list)
(princ "No debug-on-entry functions now\n")
(princ "Functions set to debug on entry:\n\n")
(dolist (fun debug-function-list)
(make-text-button (point) (progn (prin1 fun) (point))
'type 'help-function
'help-args (list fun))
(terpri))
(terpri)
(princ "Note: if you have redefined a function, then it may no longer\n")
(princ "be set to debug on entry, even if it is in the list.")))))
(provide 'debug)