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    Length: 2950 (0xb86)
    Types: TextFile
    Names: »xdebug.scm«, »xdebug.scm.2«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/gnu-31mar87/scheme/microcode/xdebug.scm« 
    └─⟦this⟧ »EUUGD11/gnu-31mar87/scheme/scm/xdebug.scm.2« 

TextFile

;;; -*- Scheme -*-, what a joy!
;;;
;;;	Copyright (c) 1986 Massachusetts Institute of Technology
;;;
;;;	This material was developed by the Scheme project at the
;;;	Massachusetts Institute of Technology, Department of
;;;	Electrical Engineering and Computer Science.  Permission to
;;;	copy this software, to redistribute it, and to use it for any
;;;	purpose is granted, subject to the following restrictions and
;;;	understandings.
;;;
;;;	1. Any copy made of this software must include this copyright
;;;	notice in full.
;;;
;;;	2. Users of this software agree to make their best efforts (a)
;;;	to return to the MIT Scheme project any improvements or
;;;	extensions that they make, so that these may be included in
;;;	future releases; and (b) to inform MIT of noteworthy uses of
;;;	this software.
;;;
;;;	3.  All materials developed as a consequence of the use of
;;;	this software shall duly acknowledge such use, in accordance
;;;	with the usual standards of acknowledging credit in academic
;;;	research.
;;;
;;;	4. MIT has made no warrantee or representation that the
;;;	operation of this software will be error-free, and MIT is
;;;	under no obligation to provide any services, by way of
;;;	maintenance, update, or otherwise.
;;;
;;;	5.  In conjunction with products arising from the use of this
;;;	material, there shall be no use of the name of the
;;;	Massachusetts Institute of Technology nor of any adaptation
;;;	thereof in any advertising, promotional, or sales literature
;;;	without prior written consent from MIT in each case.
;;;

;;; Define the debugging external primitives

(define show-pure (make-primitive-procedure 'show-pure))

(define show-env (make-primitive-procedure 'show-env))

(define back-trace (make-primitive-procedure 'back-trace))

(define find-symbol (make-primitive-procedure 'find-symbol))

(define debug-flags (make-primitive-procedure 'debug-flags))

(define print-memory (make-primitive-procedure 'print-memory))

(define make-pointer (make-primitive-procedure 'make-pointer))

(define find-who-points
  (let ((internal (make-primitive-procedure 'find-who-points))
	(the-modes '((EQ . 0) (FULL-EQ . 0) (SAFE-EQ . 1) 
                     (ADDRESS-EQ . 2) (DATUM-EQ . 3)))
	(the-options '((PRINT . 1) (COLLECT . 2))))

    (named-lambda (find-who-points obj #!optional mode . options)
      (if (unassigned? mode) (set! mode 'full-eq))
      (internal obj
		(let ((place (assq mode the-modes)))
		  (if (null? place)
		      (error "Find-who-points: Unknown mode" mode)
		      (cdr place)))
		(let loop ((n 0) (options options))
		  (cond ((null? options) n)
			((memq (car options) (cdr options))
			 ;; Ignore repetitions.
			 (loop n (cdr options)))
			(else
			 (let ((place (assq (car options) the-options)))
			   (if (null? place)
			       (error "Find-who-points: Unknown option" 
                                      (car options))
			       (loop (+ n (cdr place)) (cdr options)))))))))))