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
|
;;; Guile VM code converters
;; Copyright (C) 2001, 2009 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 3 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;;; Code:
(define-module (language assembly disassemble)
#:use-module (ice-9 format)
#:use-module (system vm instruction)
#:use-module (system vm program)
#:use-module (system base pmatch)
#:use-module (language assembly)
#:use-module (system base compile)
#:export (disassemble))
(define (disassemble x)
(format #t "Disassembly of ~A:\n\n" x)
(call-with-values
(lambda () (decompile x #:from 'value #:to 'assembly))
disassemble-load-program))
(define (disassemble-load-program asm env)
(pmatch asm
((load-program ,nargs ,nrest ,nlocs ,labels ,len ,meta . ,code)
(let ((objs (and env (assq-ref env 'objects)))
(free-vars (and env (assq-ref env 'free-vars)))
(meta (and env (assq-ref env 'meta)))
(blocs (and env (assq-ref env 'blocs)))
(srcs (and env (assq-ref env 'sources))))
(let lp ((pos 0) (code code) (programs '()))
(cond
((null? code)
(newline)
(for-each
(lambda (sym+asm)
(format #t "Embedded program ~A:\n\n" (car sym+asm))
(disassemble-load-program (cdr sym+asm) '()))
(reverse! programs)))
(else
(let* ((asm (car code))
(len (byte-length asm))
(end (+ pos len)))
(pmatch asm
((load-program . _)
(let ((sym (gensym "")))
(print-info pos `(load-program ,sym) #f #f)
(lp (+ pos (byte-length asm)) (cdr code)
(acons sym asm programs))))
((nop)
(lp (+ pos (byte-length asm)) (cdr code) programs))
(else
(print-info pos asm
(code-annotation end asm objs nargs blocs
labels)
(and=> (and srcs (assq end srcs)) source->string))
(lp (+ pos (byte-length asm)) (cdr code) programs)))))))
(if (pair? free-vars)
(disassemble-free-vars free-vars))
(if meta
(disassemble-meta meta))
;; Disassemble other bytecode in it
;; FIXME: something about the module.
(if objs
(for-each
(lambda (x)
(if (program? x)
(begin (display "----------------------------------------\n")
(disassemble x))))
(cdr (vector->list objs))))))
(else
(error "bad load-program form" asm))))
(define (disassemble-objects objs)
(display "Objects:\n\n")
(let ((len (vector-length objs)))
(do ((n 0 (1+ n)))
((= n len) (newline))
(print-info n (vector-ref objs n) #f #f))))
(define (disassemble-free-vars free-vars)
(display "Free variables:\n\n")
(let ((i 0))
(cond ((< i (vector-length free-vars))
(print-info i (vector-ref free-vars i) #f #f)
(lp (1+ i))))))
(define-macro (unless test . body)
`(if (not ,test) (begin ,@body)))
(define *uninteresting-props* '(name))
(define (disassemble-meta meta)
(let ((sources (cadr meta))
(props (filter (lambda (x)
(not (memq (car x) *uninteresting-props*)))
(cddr meta))))
(unless (null? props)
(display "Properties:\n\n")
(for-each (lambda (x) (print-info #f x #f #f)) props)
(newline))))
(define (source->string src)
(format #f "~a:~a:~a" (or (source:file src) "(unknown file)")
(source:line src) (source:column src)))
(define (make-int16 byte1 byte2)
(+ (* byte1 256) byte2))
(define (code-annotation end-addr code objs nargs blocs labels)
(let* ((code (assembly-unpack code))
(inst (car code))
(args (cdr code)))
(case inst
((list vector)
(list "~a element~:p" (apply make-int16 args)))
((br br-if br-if-eq br-if-not br-if-not-eq br-if-not-null br-if-null)
(list "-> ~A" (assq-ref labels (car args))))
((object-ref)
(and objs (list "~s" (vector-ref objs (car args)))))
((local-ref local-boxed-ref local-set local-boxed-set)
(and blocs
(let lp ((bindings (list-ref blocs (car args))))
(and (pair? bindings)
(let ((b (car bindings)))
(if (and (< (binding:start (car bindings)) end-addr)
(>= (binding:end (car bindings)) end-addr))
(list "`~a'~@[ (arg)~]"
(binding:name b) (< (binding:index b) nargs))
(lp (cdr bindings))))))))
((free-ref free-boxed-ref free-boxed-set)
;; FIXME: we can do better than this
(list "(closure variable)"))
((toplevel-ref toplevel-set)
(and objs
(let ((v (vector-ref objs (car args))))
(if (and (variable? v) (variable-bound? v))
(list "~s" (variable-ref v))
(list "`~s'" v)))))
((mv-call)
(list "MV -> ~A" (assq-ref labels (cadr args))))
(else
(and=> (assembly->object code)
(lambda (obj) (list "~s" obj)))))))
;; i am format's daddy.
(define (print-info addr info extra src)
(format #t "~4@S ~32S~@[;; ~1{~@?~}~]~@[~61t at ~a~]\n" addr info extra src))
(define (simplify x)
(cond ((string? x)
(cond ((string-index x #\newline) =>
(lambda (i) (set! x (substring x 0 i)))))
(cond ((> (string-length x) 16)
(set! x (string-append (substring x 0 13) "..."))))))
x)
|
