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;;; Guile VM debugging facilities
;; Copyright (C) 2001 Free Software Foundation, Inc.
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program; see the file COPYING. If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Code:
(define-module (system vm debug)
:use-syntax (system base syntax)
;; :use-module ((system vm core)
;; :select (vm-last-frame-chain vm-backtrace))
:use-module (system vm frame)
:use-module (ice-9 format)
:export (vm-debugger vm-backtrace))
;;;
;;; Debugger
;;;
(define-record (<debugger> vm chain index))
(define (vm-debugger vm)
(let ((chain (vm-last-frame-chain vm)))
(if (null? chain)
(display "Nothing to debug\n")
(debugger-repl (make-debugger
:vm vm :chain chain :index (length chain))))))
(define (debugger-repl db)
(let loop ()
(display "debug> ")
(let ((cmd (read)))
(case cmd
((bt) (vm-backtrace (debugger-vm db)))
((stack)
(write (vm-fetch-stack (debugger-vm db)))
(newline))
(else
(format #t "Unknown command: ~A" cmd))))))
;;;
;;; Backtrace
;;;
(define (vm-backtrace vm)
(let ((chain (vm-last-frame-chain vm)))
(if (null? chain)
(display "No backtrace available\n")
(for-each print-frame (reverse! chain)))))
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