267 lines
7.1 KiB
Scheme
267 lines
7.1 KiB
Scheme
; Time-stamp: <97/08/19 15:07:32 shriram>
|
|
; Time-stamp: <97/07/12 12:44:01 shriram>
|
|
|
|
; Differences from the Chez implementation:
|
|
|
|
; - The code does not respect tail-calls.
|
|
; - If the library is loaded more than once, especially in the middle
|
|
; of a trace, the behavior is not well-defined.
|
|
|
|
(define-signature mzlib:trace^
|
|
(-:trace-level -:trace-print-args -:trace-print-results
|
|
-:trace-table
|
|
-:make-traced-entry -:traced-entry-original-proc -:traced-entry-trace-proc
|
|
trace untrace))
|
|
|
|
(reference-library "prettyu.ss")
|
|
|
|
(define mzlib:trace@
|
|
(unit/sig mzlib:trace^
|
|
(import mzlib:pretty-print^)
|
|
|
|
(define max-dash-space-depth 10)
|
|
(define number-nesting-depth 6)
|
|
|
|
(define as-spaces
|
|
(lambda (s)
|
|
(let ((n (string-length s)))
|
|
(apply string-append
|
|
(let loop ((k n))
|
|
(if (zero? k) '("")
|
|
(cons " " (loop (sub1 k)))))))))
|
|
|
|
(define-struct prefix-entry (for-first for-rest))
|
|
|
|
(define prefixes (make-vector 20 #f))
|
|
(define prefix-vector-length 20)
|
|
|
|
(define lookup-prefix
|
|
(lambda (n)
|
|
(and (< n prefix-vector-length)
|
|
(vector-ref prefixes n))))
|
|
|
|
(define insert-prefix
|
|
(lambda (n first rest)
|
|
(if (>= n prefix-vector-length)
|
|
(let ((v (make-vector (* 2 prefix-vector-length) #f)))
|
|
(let loop ((k 0))
|
|
(when (< k prefix-vector-length)
|
|
(vector-set! v k (vector-ref prefixes k))
|
|
(loop (add1 k))))
|
|
(set! prefixes v)
|
|
(set! prefix-vector-length (* 2 prefix-vector-length))
|
|
(insert-prefix n first rest))
|
|
(vector-set! prefixes n (make-prefix-entry first rest)))))
|
|
|
|
(define construct-prefixes
|
|
(lambda (level)
|
|
(let loop ((n level)
|
|
(first '("|"))
|
|
(rest '(" ")))
|
|
(if (>= n max-dash-space-depth)
|
|
(let-values (((pre-first pre-rest)
|
|
(build-prefixes number-nesting-depth)))
|
|
(let ((s (number->string level)))
|
|
(values
|
|
(apply string-append
|
|
(cons pre-first (cons "[" (cons s (cons "]" '())))))
|
|
(apply string-append
|
|
(cons pre-rest (cons " " (cons (as-spaces s)
|
|
(cons " " '()))))))))
|
|
(cond
|
|
((= n 0) (values (apply string-append (reverse first))
|
|
(apply string-append (reverse rest))))
|
|
((= n 1) (loop (- n 1)
|
|
(cons '" " first)
|
|
(cons '" " rest)))
|
|
(else (loop (- n 2)
|
|
(cons " |" first)
|
|
(cons " " rest))))))))
|
|
|
|
(define build-prefixes
|
|
(lambda (level)
|
|
(let ((p (lookup-prefix level)))
|
|
(if p
|
|
(values (prefix-entry-for-first p)
|
|
(prefix-entry-for-rest p))
|
|
(let-values (((first rest)
|
|
(construct-prefixes level)))
|
|
(insert-prefix level first rest)
|
|
(values first rest))))))
|
|
|
|
(define -:trace-level -1)
|
|
|
|
(define -:trace-print-args
|
|
(lambda (name args)
|
|
(let-values (((first rest)
|
|
(build-prefixes -:trace-level)))
|
|
(parameterize ((pretty-print-print-line
|
|
(lambda (n port offset width)
|
|
(display
|
|
(if n
|
|
(if (zero? n) first
|
|
(format "~n~a" rest))
|
|
(format "~n"))
|
|
port)
|
|
(if n
|
|
(if (zero? n)
|
|
(string-length first)
|
|
(string-length rest))
|
|
0))))
|
|
(pretty-print (cons name args))))))
|
|
|
|
(define -:trace-print-results
|
|
(lambda (name results)
|
|
(let-values (((first rest)
|
|
(build-prefixes -:trace-level)))
|
|
(parameterize ((pretty-print-print-line
|
|
(lambda (n port offset width)
|
|
(display
|
|
(if n
|
|
(if (zero? n) first
|
|
(format "~n~a" rest))
|
|
(format "~n"))
|
|
port)
|
|
(if n
|
|
(if (zero? n)
|
|
(string-length first)
|
|
(string-length rest))
|
|
0))))
|
|
(cond
|
|
((null? results)
|
|
(pretty-display "*** no values ***"))
|
|
((null? (cdr results))
|
|
(pretty-print (car results)))
|
|
(else
|
|
(pretty-print (car results))
|
|
(parameterize ((pretty-print-print-line
|
|
(lambda (n port offset width)
|
|
(display
|
|
(if n
|
|
(if (zero? n) rest
|
|
(format "~n~a" rest))
|
|
(format "~n"))
|
|
port)
|
|
(if n
|
|
(string-length rest)
|
|
0))))
|
|
(for-each pretty-print (cdr results)))))))))
|
|
|
|
(define-struct traced-entry (original-proc trace-proc))
|
|
|
|
(define -:make-traced-entry make-traced-entry)
|
|
(define -:traced-entry-original-proc traced-entry-original-proc)
|
|
(define -:traced-entry-trace-proc traced-entry-trace-proc)
|
|
|
|
(define -:trace-table
|
|
(make-hash-table))
|
|
|
|
(define trace
|
|
(lambda ids
|
|
(let loop ((ids ids))
|
|
(unless (null? ids)
|
|
(unless (symbol? (car ids))
|
|
(error 'trace "~s not a name" (car ids)))
|
|
(loop (cdr ids))))
|
|
`(#%begin
|
|
,@(map
|
|
(lambda (id)
|
|
`(#%with-handlers ((#%exn:variable?
|
|
(#%lambda (exn)
|
|
(#%if (#%eq? (#%exn:variable-id exn) ',id)
|
|
(#%error 'trace
|
|
"~s is not bound" ',id)
|
|
(#%raise exn)))))
|
|
(#%let ((global (#%global-defined-value ',id)))
|
|
(#%unless (#%procedure? global)
|
|
(#%error 'trace
|
|
"the top-level value of ~s is not a procedure" ',id)))))
|
|
ids)
|
|
,@(map
|
|
(lambda (id)
|
|
(let ((traced-name (string->symbol
|
|
(string-append "traced-"
|
|
(symbol->string id))))
|
|
(table-entry (gensym 'table-entry))
|
|
(real-value (gensym 'real-value))
|
|
(global-value (gensym 'global-value)))
|
|
`(#%let ((,global-value (#%global-defined-value ',id)))
|
|
(#%let ((,table-entry (#%hash-table-get -:trace-table ',id
|
|
(#%lambda () #f))))
|
|
(#%unless (#%and ,table-entry
|
|
(#%eq? ,global-value
|
|
(-:traced-entry-trace-proc ,table-entry)))
|
|
(#%let* ((,real-value ,global-value)
|
|
(,traced-name
|
|
(#%lambda args
|
|
(#%dynamic-wind
|
|
(lambda ()
|
|
(#%set! -:trace-level
|
|
(#%add1 -:trace-level)))
|
|
(lambda ()
|
|
(-:trace-print-args ',id args)
|
|
(#%call-with-values
|
|
(#%lambda ()
|
|
(#%apply ,real-value args))
|
|
(#%lambda results
|
|
(flush-output)
|
|
(-:trace-print-results ',id
|
|
results)
|
|
(#%apply #%values results))))
|
|
(lambda ()
|
|
(#%set! -:trace-level
|
|
(#%sub1 -:trace-level)))))))
|
|
(#%hash-table-put! -:trace-table ',id
|
|
(-:make-traced-entry ,real-value ,traced-name))
|
|
(#%global-defined-value ',id ,traced-name)))))))
|
|
ids)
|
|
(#%quote ,ids))))
|
|
|
|
(define untrace
|
|
(lambda ids
|
|
(let loop ((ids ids))
|
|
(unless (null? ids)
|
|
(unless (symbol? (car ids))
|
|
(error 'untrace "~s not an identifier" (car ids)))
|
|
(loop (cdr ids)))
|
|
`(#%apply #%append
|
|
(#%list
|
|
,@(map (lambda (id)
|
|
`(let ((entry (#%hash-table-get -:trace-table
|
|
',id (#%lambda () #f))))
|
|
(#%if (#%and entry
|
|
(#%eq? (#%global-defined-value ',id)
|
|
(-:traced-entry-trace-proc entry)))
|
|
(#%begin
|
|
(#%hash-table-put! -:trace-table
|
|
',id #f)
|
|
(#%global-defined-value ',id
|
|
(-:traced-entry-original-proc entry))
|
|
(#%list ',id))
|
|
'())))
|
|
ids))))))
|
|
|
|
))
|
|
|
|
(invoke-open-unit/sig
|
|
(compound-unit/sig
|
|
(import)
|
|
(link
|
|
(PRETTY : mzlib:pretty-print^
|
|
(mzlib:pretty-print@))
|
|
(TRACE : mzlib:trace^
|
|
(mzlib:trace@ PRETTY)))
|
|
(export
|
|
(open TRACE)))
|
|
#f)
|
|
|
|
(define-macro trace trace)
|
|
(define-macro untrace untrace)
|
|
|
|
(keyword-name '-:trace-print-args)
|
|
(keyword-name '-:trace-print-results)
|
|
(keyword-name '-:trace-table)
|
|
(keyword-name '-:make-traced-entry)
|
|
(keyword-name '-:traced-entry-original-proc)
|
|
(keyword-name '-:traced-entry-trace-proc)
|