;;; debug.el --- debuggers and related commands for Emacs
-;; Copyright (C) 1985, 1986, 1994 Free Software Foundation, Inc.
+;; Copyright (C) 1985, 1986, 1994, 2001, 2003 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: lisp, tools, maint
;;; Code:
+(require 'button)
+
(defgroup debugger nil
"Debuggers and related commands for Emacs."
:prefix "debugger-"
: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")
(defcustom debug-function-list nil
"List of functions currently set for debug on entry."
(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-track-mouse)
(defvar debugger-outer-last-command)
(defvar debugger-outer-this-command)
+;; unread-command-char is obsolete,
+;; but we still save and restore it
+;; in case some user program still tries to set it.
(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)
;;;###autoload
any other args you like. In that case, the list of args after the
first will be printed into the backtrace buffer."
(interactive)
- (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)
- ;; Don't keep reading from an executing kbd macro!
- (executing-kbd-macro nil)
- ;; Save the outer values of these vars for the `e' command
- ;; before we replace the values.
- (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 unread-command-char)
- (debugger-outer-unread-command-events unread-command-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-cursor-in-echo-area cursor-in-echo-area))
- ;; Set this instead of binding it, so that `q'
- ;; will not restore it.
- (setq overriding-terminal-local-map nil)
- ;; Don't let these magic variables affect the debugger itself.
- (let ((last-command nil) this-command track-mouse
- (unread-command-char -1) unread-command-events
- last-input-event last-command-event last-nonmenu-event
- last-event-frame
- overriding-local-map
- load-read-function
- ;; If we are inside a minibuffer, allow nesting
- ;; so that we don't get an error from the `e' command.
- (enable-recursive-minibuffers (> (minibuffer-depth) 0))
- (standard-input t) (standard-output t)
- (cursor-in-echo-area nil))
- (unwind-protect
- (save-excursion
- (save-window-excursion
- (pop-to-buffer debugger-buffer)
- (erase-buffer)
- (set-buffer-multibyte nil)
- (let ((standard-output (current-buffer))
- (print-escape-newlines t)
- (print-length 50))
- (backtrace))
- (goto-char (point-min))
- (debugger-mode)
- (delete-region (point)
- (progn
- (search-forward "\n debug(")
- (forward-line 1)
- (point)))
- (debugger-reenable)
- ;; lambda is for debug-on-call when a function call is next.
- ;; debug is for debug-on-entry function called.
- (cond ((memq (car debugger-args) '(lambda debug))
- (insert "Entering:\n")
- (if (eq (car debugger-args) 'debug)
- (progn
- ;; Skip the frames for backtrace-debug, byte-code,
- ;; and debug.
- (backtrace-debug 3 t)
- (delete-char 1)
- (insert ?*)
- (beginning-of-line))))
- ;; Exiting a function.
- ((eq (car debugger-args) 'exit)
- (insert "Return value: ")
- (setq debugger-value (nth 1 debugger-args))
- (prin1 debugger-value (current-buffer))
- (insert ?\n)
- (delete-char 1)
- (insert ? )
- (beginning-of-line))
- ;; Debugger entered for an error.
- ((eq (car debugger-args) 'error)
- (insert "Signaling: ")
- (prin1 (nth 1 debugger-args) (current-buffer))
- (insert ?\n))
- ;; debug-on-call, when the next thing is an eval.
- ((eq (car debugger-args) t)
- (insert "Beginning evaluation of function call form:\n"))
- ;; User calls debug directly.
- (t
- (prin1 (if (eq (car debugger-args) 'nil)
- (cdr debugger-args) debugger-args)
- (current-buffer))
- (insert ?\n)))
- (message "")
- (let ((inhibit-trace t)
- (standard-output nil)
- (buffer-read-only t))
- (message "")
- ;; Make sure we unbind buffer-read-only in the right buffer.
- (save-excursion
- (recursive-edit)))))
- ;; Kill or at least neuter the backtrace buffer, so that users
- ;; don't try to execute debugger commands in an invalid context.
- (if (get-buffer-window debugger-buffer 'visible)
- ;; Still visible despite the save-window-excursion? Maybe it
- ;; it's in a pop-up frame. It would be annoying to delete and
- ;; recreate it every time the debugger stops, so instead we'll
- ;; erase it but leave it visible.
+ (if inhibit-redisplay
+ ;; Don't really try to enter debugger within an eval from 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)
+ ;; Don't keep reading from an executing kbd macro!
+ (executing-kbd-macro nil)
+ ;; Save the outer values of these vars for the `e' command
+ ;; before we replace the values.
+ (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))
+ ;; Set this instead of binding it, so that `q'
+ ;; will not restore it.
+ (setq overriding-terminal-local-map nil)
+ ;; Don't let these magic variables affect the debugger itself.
+ (let ((last-command nil) this-command track-mouse
+ 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
+ ;; If we are inside a minibuffer, allow nesting
+ ;; so that we don't get an error from the `e' command.
+ (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
- (set-buffer debugger-buffer)
- (erase-buffer)
- (fundamental-mode))
- (kill-buffer debugger-buffer))
- (set-match-data debugger-outer-match-data)))
- ;; Put into effect the modified values of these variables
- ;; in case the user set them with the `e' command.
- (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)
- (setq unread-command-char debugger-outer-unread-command-char)
- (setq unread-command-events debugger-outer-unread-command-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 cursor-in-echo-area debugger-outer-cursor-in-echo-area)
- (setq debug-on-next-call debugger-step-after-exit)
- debugger-value))
+ (save-window-excursion
+ (with-no-warnings
+ (setq unread-command-char -1))
+ (pop-to-buffer debugger-buffer)
+ (debugger-mode)
+ (debugger-setup-buffer debugger-args)
+ (when noninteractive
+ ;; If the backtrace is long, save the beginning
+ ;; and the end, but discard the middle.
+ (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))
+ (if (eq (car debugger-args) 'debug)
+ ;; Skip the frames for backtrace-debug, byte-code, and debug.
+ (backtrace-debug 3 t))
+ (debugger-reenable)
+ (message "")
+ (let ((inhibit-trace t)
+ (standard-output nil)
+ (buffer-read-only t))
+ (message "")
+ ;; Make sure we unbind buffer-read-only in the right buffer.
+ (save-excursion
+ (recursive-edit)))))
+ ;; Kill or at least neuter the backtrace buffer, so that users
+ ;; don't try to execute debugger commands in an invalid context.
+ (if (get-buffer-window debugger-buffer 'visible)
+ ;; Still visible despite the save-window-excursion? Maybe it
+ ;; it's in a pop-up frame. It would be annoying to delete and
+ ;; recreate it every time the debugger stops, so instead we'll
+ ;; erase it but leave it visible.
+ (save-excursion
+ (set-buffer debugger-buffer)
+ (erase-buffer)
+ (fundamental-mode))
+ (kill-buffer debugger-buffer))
+ (set-match-data debugger-outer-match-data)))
+ ;; Put into effect the modified values of these variables
+ ;; in case the user set them with the `e' command.
+ (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)))
+\f
+(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 1)
+ (point)))
+ (insert "Debugger entered")
+ ;; lambda is for debug-on-call when a function call is next.
+ ;; debug is for debug-on-entry function called.
+ (cond ((memq (car debugger-args) '(lambda debug))
+ (insert "--entering a function:\n")
+ (if (eq (car debugger-args) 'debug)
+ (progn
+ (delete-char 1)
+ (insert ?*)
+ (beginning-of-line))))
+ ;; Exiting a function.
+ ((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))
+ ;; Debugger entered for an error.
+ ((eq (car debugger-args) 'error)
+ (insert "--Lisp error: ")
+ (prin1 (nth 1 debugger-args) (current-buffer))
+ (insert ?\n))
+ ;; debug-on-call, when the next thing is an eval.
+ ((eq (car debugger-args) t)
+ (insert "--beginning evaluation of function call form:\n"))
+ ;; User calls debug directly.
+ (t
+ (insert ": ")
+ (prin1 (if (eq (car debugger-args) 'nil)
+ (cdr debugger-args) debugger-args)
+ (current-buffer))
+ (insert ?\n)))
+ ;; After any frame that uses eval-buffer,
+ ;; insert a line that states the buffer position it's reading at.
+ (save-excursion
+ (while (re-search-forward "^ eval-buffer(" nil t)
+ (end-of-line)
+ (insert (format "\n ;;; Reading at buffer position %d"
+ (with-current-buffer (nth 2 (backtrace-frame (debugger-frame-number)))
+ (point))))))
+ (debugger-make-xrefs))
+
+(defun debugger-make-xrefs (&optional buffer)
+ "Attach cross-references to symbol names in the `*Backtrace*' buffer."
+ (interactive "b")
+ (save-excursion
+ (set-buffer (or buffer (current-buffer)))
+ (setq buffer (current-buffer))
+ (let ((buffer-read-only nil)
+ (old-end (point-min)) (new-end (point-min)))
+ ;; If we saved an old backtrace, find the common part
+ ;; between the new and the old.
+ ;; Compare line by line, starting from the end,
+ ;; because that's the part that is likely to be unchanged.
+ (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
+ (compare-buffer-substrings
+ (current-buffer) old-start old-end
+ buffer new-start new-end)))
+ (setq all-match nil))))
+ ;; Now new-end is the position of the start of the
+ ;; unchanged part in the current buffer, and old-end is
+ ;; the position of that same text in the saved old
+ ;; backtrace. But we must subtract (point-min) since strings are
+ ;; indexed in origin 0.
+
+ ;; Replace the unchanged part of the backtrace
+ ;; with the text from debugger-previous-backtrace,
+ ;; since that already has the proper xrefs.
+ ;; With this optimization, we only need to scan
+ ;; the changed part of the backtrace.
+ (delete-region new-end (point-max))
+ (goto-char (point-max))
+ (insert (substring debugger-previous-backtrace
+ (- old-end (point-min))))
+ ;; Make the unchanged part of the backtrace inaccessible
+ ;; so it won't be scanned.
+ (narrow-to-region (point-min) new-end)))
+
+ ;; Scan the new part of the backtrace, inserting xrefs.
+ (goto-char (point-min))
+ (while (progn
+ (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))))
+ (when file
+ (goto-char beg)
+ ;; help-xref-button needs to operate on something matched
+ ;; by a regexp, so set that up for it.
+ (re-search-forward "\\(\\(\\sw\\|\\s_\\)+\\)")
+ (help-xref-button 1 'help-function-def sym file)))
+ (forward-line 1))
+ (widen))
+ (setq debugger-previous-backtrace (buffer-string))))
\f
(defun debugger-step-through ()
"Proceed, stepping through subexpressions of this expression.
(defun debugger-continue ()
"Continue, evaluating this expression without stopping."
(interactive)
+ (unless debugger-may-continue
+ (error "Cannot continue"))
(message "Continuing.")
(exit-recursive-edit))
(defun debugger-jump ()
"Continue to exit from this frame, with all debug-on-entry suspended."
(interactive)
- ;; Compensate for the two extra stack frames for debugger-jump.
- (let ((debugger-frame-offset (+ debugger-frame-offset 2)))
- (debugger-frame))
+ (debugger-frame)
;; Turn off all debug-on-entry functions
;; but leave them in the list.
(let ((list debug-function-list))
(beginning-of-line)
(let ((opoint (point))
(count 0))
+ (while (not (eq (cadr (backtrace-frame count)) 'debug))
+ (setq count (1+ count)))
(goto-char (point-min))
(if (or (equal (buffer-substring (point) (+ (point) 6))
"Signal")
(forward-sexp 2))
(forward-line 1)
(<= (point) opoint))
+ (if (looking-at " *;;;")
+ (forward-line 1))
(setq count (1+ count)))
count)))
-;; Chosen empirically to account for all the frames
-;; that will exist when debugger-frame is called
-;; within the first one that appears in the backtrace buffer.
-;; Assumes debugger-frame is called from a key;
-;; will be wrong if it is called with Meta-x.
-(defconst debugger-frame-offset 8 "")
-
(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)
- (let ((level (debugger-frame-number)))
- (backtrace-debug (+ level debugger-frame-offset) t))
+ (backtrace-debug (debugger-frame-number) t)
(if (= (following-char) ? )
(let ((buffer-read-only nil))
(delete-char 1)
"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)
- (let ((level (debugger-frame-number)))
- (backtrace-debug (+ level debugger-frame-offset) nil))
+ (backtrace-debug (debugger-frame-number) nil)
(if (= (following-char) ?*)
(let ((buffer-read-only nil))
(delete-char 1)
(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))
- ;; old buffer deleted
- (setq debugger-old-buffer (current-buffer)))
- (set-buffer debugger-old-buffer)
- (let ((track-mouse debugger-outer-track-mouse)
- (last-command debugger-outer-last-command)
- (this-command debugger-outer-this-command)
- (unread-command-char debugger-outer-unread-command-char)
- (unread-command-events debugger-outer-unread-command-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)
- (cursor-in-echo-area debugger-outer-cursor-in-echo-area)
- (overriding-local-map debugger-outer-overriding-local-map)
- (overriding-terminal-local-map
- debugger-outer-overriding-terminal-local-map)
- (load-read-function debugger-outer-load-read-function))
- (set-match-data debugger-outer-match-data)
- (prog1 (progn (,@ body))
- (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-char unread-command-char)
- (setq debugger-outer-unread-command-events unread-command-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-cursor-in-echo-area cursor-in-echo-area)
- )))))
+ `(save-excursion
+ (if (null (buffer-name debugger-old-buffer))
+ ;; old buffer deleted
+ (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."
(debugger-env-macro (eval-expression exp)))
\f
(defvar debugger-mode-map nil)
-(if debugger-mode-map
- nil
+(unless debugger-mode-map
(let ((loop ? ))
(setq debugger-mode-map (make-keymap))
+ (set-keymap-parent debugger-mode-map button-buffer-map)
(suppress-keymap debugger-mode-map)
(define-key debugger-mode-map "-" 'negative-argument)
(define-key debugger-mode-map "b" 'debugger-frame)
(define-key debugger-mode-map "e" 'debugger-eval-expression)
(define-key debugger-mode-map " " 'next-line)
(define-key debugger-mode-map "R" 'debugger-record-expression)
+ (define-key debugger-mode-map "\C-m" 'help-follow)
+ (define-key debugger-mode-map [mouse-2] 'push-button)
))
(interactive "aDebug on entry (to function): ")
(debugger-reenable)
;; Handle a function that has been aliased to some other function.
- (if (symbolp (symbol-function function))
+ (if (and (subrp (symbol-function function))
+ (eq (cdr (subr-arity (symbol-function function))) 'unevalled))
+ (error "Function %s is a special form" function))
+ (if (or (symbolp (symbol-function function))
+ (subrp (symbol-function function)))
+ ;; Create a wrapper in which we can then add the necessary debug call.
(fset function `(lambda (&rest debug-on-entry-args)
+ ,(interactive-form (symbol-function function))
(apply ',(symbol-function function)
debug-on-entry-args))))
- (if (subrp (symbol-function function))
- (error "Function %s is a primitive" function))
(or (consp (symbol-function function))
(debug-convert-byte-code function))
(or (consp (symbol-function function))
(error "Definition of %s is not a list" function))
(fset function (debug-on-entry-1 function (symbol-function function) t))
(or (memq function debug-function-list)
- (setq debug-function-list (cons function debug-function-list)))
+ (push function debug-function-list))
function)
;;;###autoload
(interactive
(list (let ((name
(completing-read "Cancel debug on entry (to function): "
- ;; Make an "alist" of the functions
- ;; that now have debug on entry.
- (mapcar 'list
- (mapcar 'symbol-name
- debug-function-list))
+ (mapcar 'symbol-name debug-function-list)
nil t nil)))
(if name (intern name)))))
(debugger-reenable)
(if (and function (not (string= function "")))
(progn
- (fset function
- (debug-on-entry-1 function (symbol-function function) nil))
+ (let ((f (debug-on-entry-1 function (symbol-function function) nil)))
+ (condition-case nil
+ (if (and (equal (nth 1 f) '(&rest debug-on-entry-args))
+ (eq (car (nth 3 f)) 'apply))
+ ;; `f' is a wrapper introduced in debug-on-entry.
+ ;; Get rid of it since we don't need it any more.
+ (setq f (nth 1 (nth 1 (nth 3 f)))))
+ (error nil))
+ (fset function f))
(setq debug-function-list (delq function debug-function-list))
function)
(message "Cancelling debug-on-entry for all functions")
(debug-on-entry-1 function (cdr defn) flag)
(or (eq (car defn) 'lambda)
(error "%s not user-defined Lisp function" function))
- (let (tail prec)
- (if (stringp (car (nthcdr 2 defn)))
- (setq tail (nthcdr 3 defn)
- prec (list (car defn) (car (cdr defn))
- (car (cdr (cdr defn)))))
- (setq tail (nthcdr 2 defn)
- prec (list (car defn) (car (cdr defn)))))
- (if (eq flag (equal (car tail) '(debug 'debug)))
- defn
- (if flag
- (nconc prec (cons '(debug 'debug) tail))
- (nconc prec (cdr tail))))))))
+ (let ((tail (cddr defn)))
+ ;; Skip the docstring.
+ (if (stringp (car tail)) (setq tail (cdr tail)))
+ ;; Skip the interactive form.
+ (if (eq 'interactive (car-safe (car tail))) (setq tail (cdr tail)))
+ (unless (eq flag (equal (car tail) '(debug 'debug)))
+ ;; Add/remove debug statement as needed.
+ (if (not flag)
+ (progn (setcar tail (cadr tail))
+ (setcdr tail (cddr tail)))
+ (setcdr tail (cons (car tail) (cdr tail)))
+ (setcar tail '(debug 'debug))))
+ defn))))
(defun debugger-list-functions ()
"Display a list of all the functions now set to debug on entry."
(provide 'debug)
+;;; arch-tag: b6ec7047-f801-4103-9c63-d69322db9d3b
;;; debug.el ends here
HCoop / bpt / emacs.git / blobdiff