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;;;; (ice-9 debugger breakpoints procedural) -- procedural breakpoints
;;; Copyright (C) 2002 Free Software Foundation, Inc.
;;;
;; This library is free software; you can redistribute it and/or
;; modify it under the terms of the GNU Lesser General Public
;; License as published by the Free Software Foundation; either
;; version 2.1 of the License, or (at your option) any later version.
;;
;; This library 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
;; Lesser General Public License for more details.
;;
;; You should have received a copy of the GNU Lesser General Public
;; License along with this library; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(define-module (ice-9 debugger breakpoints procedural)
#:use-module (ice-9 format)
#:use-module (oop goops)
#:use-module (ice-9 debugger breakpoints)
#:use-module (ice-9 debugger trc)
#:use-module (ice-9 debugger trap-hooks)
#:export (<procedure-breakpoint>
bp-procedure))
;;; {Procedure Breakpoints}
;;;
;;; Breakpoints that activate upon application of a particular
;;; procedure.
(define-generic bp-procedure)
(define-generic bp-hook)
(define-class <procedure-breakpoint> (<breakpoint>)
;; The procedure to which this breakpoint applies.
(procedure #:accessor bp-procedure
#:init-keyword #:procedure)
;; The procedure that is registered as a trace hook for this
;; breakpoint, stored here so that we can easily deregister it.
(hook #:accessor bp-hook))
(define (nameify proc)
(or (procedure-name proc) proc))
(define-method (bp-message (bp <procedure-breakpoint>) message port)
(format port
"~A ~A: [~A]\n"
message
(bp-number bp)
(nameify (bp-procedure bp))))
;;; Alist of all procedure breakpoints:
;;; ((PROCEDURE . BREAKPOINT) ...)
;;; Keys are unique according to `eq?'.
(define procedure-breakpoints '())
(define-method (get-breakpoint (proc <procedure>))
(assq-ref procedure-breakpoints proc))
(define *proc* #f)
(add-hook! before-apply-frame-hook
(lambda (cont tail?)
(trc 'before-apply-frame-hook tail?)
;(set! *expr* #f)
(set! *proc* (frame-procedure (last-stack-frame cont)))))
(define (add-breakpoint proc)
(let* ((bp (make <procedure-breakpoint> #:procedure proc))
(hook (lambda ()
(if (eq? proc *proc*)
(bp-run bp)))))
(set-procedure-property! proc 'trace #t)
(set! (bp-hook bp) hook)
(add-trace-hook! hook)
(set! procedure-breakpoints (assq-set! procedure-breakpoints proc bp))
bp))
(define-method (set-breakpoint! behaviour (proc <procedure>))
(let ((bp (or (get-breakpoint proc)
(add-breakpoint proc))))
(set! (bp-behaviour bp) behaviour)
(bp-message bp "Set breakpoint" #t)
bp))
(define-method (bp-delete! (bp <procedure-breakpoint>))
(let ((proc (bp-procedure bp)))
(set! procedure-breakpoints
(assq-remove! procedure-breakpoints proc))
(set-procedure-property! proc 'trace #f)
(remove-trace-hook! (bp-hook bp))
(bp-message bp "Deleted breakpoint" #t))
*unspecified*)
(register-breakpoint-subclass <procedure-breakpoint>
(lambda ()
(map cdr procedure-breakpoints)))
;;; (ice-9 debugger breakpoints procedure) ends here.
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