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