1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
|
;;;; "trace.scm" Utility functions and macros for tracing in Scheme.
;;; Copyright (C) 1991, 1992, 1993, 1994, 1995, 1999, 2000, 2003 Aubrey Jaffer
;
;Permission to copy this software, to modify it, to redistribute it,
;to distribute modified versions, 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. I have made no warranty or representation that the operation of
;this software will be error-free, and I am under no obligation to
;provide any services, by way of maintenance, update, or otherwise.
;
;3. In conjunction with products arising from the use of this
;material, there shall be no use of my name in any advertising,
;promotional, or sales literature without prior written consent in
;each case.
(require 'qp) ;for the qp printer.
(require 'alist)
(define trace:indent 0)
(define debug:call-stack '()) ;keeps track of call stack.
;@
(define debug:max-count 5)
;;Formats for call-stack elements:
;; (procedure-count name . args) ;for debug:track procedure
;; (procedure-count name) ;for debug:stack procedure
;;Traced functions also stack.
;@
(define print-call-stack
(let ((car car) (null? null?) (current-error-port current-error-port)
(qpn qpn) (for-each for-each))
(lambda cep
(set! cep (if (null? cep) (current-error-port) (car cep)))
(for-each qpn debug:call-stack))))
(define (call-stack-news? name)
(or (null? debug:call-stack)
(not (eq? name (cadar debug:call-stack)))
(< (caar debug:call-stack) debug:max-count)))
(define debug:trace-procedure
(let ((null? null?) (not not) ;These bindings are so that
(cdar cdar) (cadar cadar) ;trace will not trace parts
(car car) (cdr cdr) (caar caar) ;of itself.
(eq? eq?) (+ +) (zero? zero?) (modulo modulo)
(apply apply) (display display) (qpn qpn) (list list) (cons cons)
(CALL 'CALL) ;(string->symbol "CALL")
(RETN 'RETN)) ;(string->symbol "RETN")
(lambda (how function . optname)
(set! trace:indent 0)
(let ((name (if (null? optname) function (car optname))))
(case how
((trace)
(lambda args
(cond ((and (not (null? args))
(eq? (car args) 'debug:untrace-object)
(null? (cdr args)))
function)
((call-stack-news? name)
(let ((cs debug:call-stack))
(set! debug:call-stack
(if (and (not (null? debug:call-stack))
(eq? name (cadar debug:call-stack)))
(cons (cons (+ 1 (caar debug:call-stack))
(cdar debug:call-stack))
(cdr debug:call-stack))
(cons (list 1 name) debug:call-stack)))
(do ((i trace:indent (+ -1 i))) ((zero? i)) (display #\ ))
(apply qpn CALL name args)
(set! trace:indent (modulo (+ 1 trace:indent) 16))
(let ((ans (apply function args)))
(set! trace:indent (modulo (+ -1 trace:indent) 16))
(do ((i trace:indent (+ -1 i))) ((zero? i)) (display #\ ))
(qpn RETN name ans)
(set! debug:call-stack cs)
ans)))
(else (apply function args)))))
((track)
(lambda args
(cond ((and (not (null? args))
(eq? (car args) 'debug:untrace-object)
(null? (cdr args)))
function)
((call-stack-news? name)
(let ((cs debug:call-stack))
(set! debug:call-stack
(if (and (not (null? debug:call-stack))
(eq? name (cadar debug:call-stack)))
(cons (cons (+ 1 (caar debug:call-stack))
(cdar debug:call-stack))
(cdr debug:call-stack))
(cons (cons 1 (cons name args))
debug:call-stack)))
(let ((ans (apply function args)))
(set! debug:call-stack cs)
ans)))
(else (apply function args)))))
((stack)
(lambda args
(cond ((and (not (null? args))
(eq? (car args) 'debug:untrace-object)
(null? (cdr args)))
function)
((call-stack-news? name)
(let ((cs debug:call-stack))
(set! debug:call-stack
(if (and (not (null? debug:call-stack))
(eq? name (cadar debug:call-stack)))
(cons (cons (+ 1 (caar debug:call-stack))
(cdar debug:call-stack))
(cdr debug:call-stack))
(cons (list 1 name) debug:call-stack)))
(let ((ans (apply function args)))
(set! debug:call-stack cs)
ans)))
(else (apply function args)))))
(else
(slib:error 'debug:trace-procedure 'unknown 'how '= how)))))))
;;; The reason I use a symbol for debug:untrace-object is so that
;;; functions can still be untraced if this file is read in twice.
;@
(define (untracef function)
(set! trace:indent 0)
(function 'debug:untrace-object))
;;;;The trace: functions wrap around the debug: functions to provide
;;; niceties like keeping track of traced functions and dealing with
;;; redefinition.
(define trace:adder (alist-associator eq?))
(define trace:deler (alist-remover eq?))
(define *traced-procedures* '())
(define *tracked-procedures* '())
(define *stacked-procedures* '())
(define (trace:trace-procedure how fun sym)
(define cep (current-error-port))
(cond ((not (procedure? fun))
(display "WARNING: not a procedure " cep)
(display sym cep)
(newline cep)
(set! *traced-procedures* (trace:deler *traced-procedures* sym))
(set! *tracked-procedures* (trace:deler *tracked-procedures* sym))
(set! *stacked-procedures* (trace:deler *stacked-procedures* sym))
fun)
(else
(let ((p (assq sym (case how
((trace) *traced-procedures*)
((track) *tracked-procedures*)
((stack) *stacked-procedures*)))))
(cond ((and p (eq? (cdr p) fun))
fun)
(else
(let ((tfun (debug:trace-procedure how fun sym)))
(case how
((trace)
(set! *traced-procedures*
(trace:adder *traced-procedures* sym tfun)))
((track)
(set! *tracked-procedures*
(trace:adder *tracked-procedures* sym tfun)))
((stack)
(set! *stacked-procedures*
(trace:adder *stacked-procedures* sym tfun))))
tfun)))))))
(define (trace:untrace-procedure fun sym)
(define finish
(lambda (p)
(cond ((not (procedure? fun)) fun)
((eq? (cdr p) fun) (untracef fun))
(else fun))))
(cond ((assq sym *traced-procedures*)
=>
(lambda (p)
(set! *traced-procedures* (trace:deler *traced-procedures* sym))
(finish p)))
((assq sym *tracked-procedures*)
=>
(lambda (p)
(set! *tracked-procedures* (trace:deler *tracked-procedures* sym))
(finish p)))
((assq sym *stacked-procedures*)
=>
(lambda (p)
(set! *stacked-procedures* (trace:deler *stacked-procedures* sym))
(finish p)))
(else fun)))
;@
(define (tracef . args) (apply debug:trace-procedure 'trace args))
;@
(define (trackf . args) (apply debug:trace-procedure 'track args))
;@
(define (stackf . args) (apply debug:trace-procedure 'stack args))
;;;; Finally, the macros trace and untrace
;@
(defmacro trace xs
(if (null? xs)
`(begin (set! trace:indent 0)
,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'trace ,x ',x)))
(map car *traced-procedures*))
(map car *traced-procedures*))
`(begin ,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'trace ,x ',x))) xs))))
(defmacro track xs
(if (null? xs)
`(begin ,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'track ,x ',x)))
(map car *tracked-procedures*))
(map car *tracked-procedures*))
`(begin ,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'track ,x ',x))) xs))))
(defmacro stack xs
(if (null? xs)
`(begin ,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'stack ,x ',x)))
(map car *stacked-procedures*))
(map car *stacked-procedures*))
`(begin ,@(map (lambda (x)
`(set! ,x (trace:trace-procedure 'stack ,x ',x))) xs))))
;@
(defmacro untrace xs
(if (null? xs)
(slib:eval
`(begin ,@(map (lambda (x)
`(set! ,x (trace:untrace-procedure ,x ',x)))
(map car *traced-procedures*))
'',(map car *traced-procedures*)))
`(begin ,@(map (lambda (x)
`(set! ,x (trace:untrace-procedure ,x ',x))) xs))))
(defmacro untrack xs
(if (null? xs)
(slib:eval
`(begin ,@(map (lambda (x)
`(set! ,x (track:untrack-procedure ,x ',x)))
(map car *tracked-procedures*))
'',(map car *tracked-procedures*)))
`(begin ,@(map (lambda (x)
`(set! ,x (track:untrack-procedure ,x ',x))) xs))))
(defmacro unstack xs
(if (null? xs)
(slib:eval
`(begin ,@(map (lambda (x)
`(set! ,x (stack:unstack-procedure ,x ',x)))
(map car *stacked-procedures*))
'',(map car *stacked-procedures*)))
`(begin ,@(map (lambda (x)
`(set! ,x (stack:unstack-procedure ,x ',x))) xs))))
|
