HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| d8158b83 AW |
1 | ;;; -*- mode: scheme; coding: utf-8; -*- |
| 2 | ||
| 28969427 | 3 | ;;;; Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2014 |
| d8158b83 AW |
4 | ;;;; Free Software Foundation, Inc. |
| 5 | ;;;; | |
| 6 | ;;;; This library is free software; you can redistribute it and/or | |
| 7 | ;;;; modify it under the terms of the GNU Lesser General Public | |
| 8 | ;;;; License as published by the Free Software Foundation; either | |
| 9 | ;;;; version 3 of the License, or (at your option) any later version. | |
| 10 | ;;;; | |
| 11 | ;;;; This library is distributed in the hope that it will be useful, | |
| 12 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | ;;;; Lesser General Public License for more details. | |
| 15 | ;;;; | |
| 16 | ;;;; You should have received a copy of the GNU Lesser General Public | |
| 17 | ;;;; License along with this library; if not, write to the Free Software | |
| 18 | ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | ;;;; | |
| 20 | ||
| 21 | \f | |
| 22 | ||
| 23 | ;;; Commentary: | |
| 24 | ||
| 25 | ;;; An older approack to debugging, in which the user installs a pre-unwind | |
| 26 | ;;; handler that saves the stack at the time of the error. The last stack can | |
| 27 | ;;; then be debugged later. | |
| 28 | ;;; | |
| 29 | ||
| 30 | ;;; Code: | |
| 31 | ||
| 32 | (define-module (ice-9 save-stack) | |
| 33 | ;; Replace deprecated root-module bindings, if present. | |
| 28969427 AW |
34 | #:export (stack-saved? |
| 35 | the-last-stack | |
| 36 | save-stack)) | |
| d8158b83 AW |
37 | |
| 38 | ;; FIXME: stack-saved? is broken in the presence of threads. | |
| 39 | (define stack-saved? #f) | |
| 40 | ||
| ec16eb78 AW |
41 | (define the-last-stack (make-fluid)) |
| 42 | ||
| d8158b83 AW |
43 | (define (save-stack . narrowing) |
| 44 | (if (not stack-saved?) | |
| 45 | (begin | |
| 46 | (let ((stacks (fluid-ref %stacks))) | |
| 47 | (fluid-set! the-last-stack | |
| 48 | ;; (make-stack obj inner outer inner outer ...) | |
| 49 | ;; | |
| 50 | ;; In this case, cut away the make-stack frame, the | |
| 51 | ;; save-stack frame, and then narrow as specified by the | |
| 52 | ;; user, delimited by the nearest start-stack invocation, | |
| 53 | ;; if any. | |
| 54 | (apply make-stack #t | |
| 55 | 2 | |
| 56 | (if (pair? stacks) (cdar stacks) 0) | |
| 57 | narrowing))) | |
| 58 | (set! stack-saved? #t)))) |