diff options
Diffstat (limited to 'lisp/emacs-lisp/debug.el')
| -rw-r--r-- | lisp/emacs-lisp/debug.el | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/lisp/emacs-lisp/debug.el b/lisp/emacs-lisp/debug.el index 62e413bd8d0..7db0f91b746 100644 --- a/lisp/emacs-lisp/debug.el +++ b/lisp/emacs-lisp/debug.el @@ -370,77 +370,6 @@ That buffer should be current already." ;; Place point on "stack frame 0" (bug#15101). (goto-char pos))) - -(defun debugger-make-xrefs (&optional buffer) - "Attach cross-references to function names in the `*Backtrace*' buffer." - (interactive "b") - (with-current-buffer (or buffer (current-buffer)) - (save-excursion - (setq buffer (current-buffer)) - (let ((inhibit-read-only t) - (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 - (let ((case-fold-search nil)) - (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 - (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) - ;; 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 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. |