643 lines
19 KiB
Scheme
643 lines
19 KiB
Scheme
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;;; Package for Static heaps for the Scheme Shell
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;;; Copyright (c) 1995 by Brian D. Carlstrom. See file COPYING.
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;;; based on Scheme48 implementation.
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;;; Copyright (c) 1993, 1994 by Richard Kelsey and Jonathan Rees.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; prefix for temp files - in their own dir
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(define *temp-dir* "/tmp")
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(define (test)
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(scsh-do-it *scsh-image* *temp-dir* *image-lib* "gcc -c" "ar cq"))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-record heap
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(length 0)
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(objects '())
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)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define (scsh-do-it infile tempdir outfile cc-command ar-command)
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(let* ((temp-dir (format #f "~a/scsh~s" tempdir (pid)))
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(prefix (string-append temp-dir "/static"))
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(start (read-heap-image infile)))
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(receive (pure impure reloc externs)
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(create-heaps-and-tables)
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(if (file-exists? temp-dir)
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(if (file-directory? temp-dir)
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(with-cwd temp-dir
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(map delete-file (directory-files temp-dir #t)))
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(delete-file temp-dir)))
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(create-directory temp-dir #o755 #t)
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(with-cwd temp-dir
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(write-c-header-file pure impure externs infile outfile prefix)
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(write-c-image pure impure reloc externs prefix)
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(write-main-c-file start reloc prefix)
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(compile-c-files cc-command prefix))
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(archive-files ar-command outfile prefix)
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)))
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(define debug #f)
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(define (vm-string->string x)
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(cond ((vm-string? x)
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(let ((len (vm-string-length x)))
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(let loop ((i 0)
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(l '()))
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(cond ((= i len)
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(list->string (reverse l)))
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(else
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(loop (+ i 1) (cons (vm-string-ref x i) l)))))))
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(else
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(message x " is not a vm-string"))))
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(define (read-heap-image infile)
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(let ((bytes (file-info:size (file-info infile))))
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(init (inexact->exact (floor (* 1.1 bytes))) infile)))
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; XXX need little extra space for find-all-xs
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(define (create-heaps-and-tables)
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(let* ((n (nchunks))
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( pure (make-vector n))
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(impure (make-vector n))
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(reloc (make-vector n))
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(externs (make-table )))
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;; initialize to blanks
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(let loop ((i 0))
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(cond ((not (= i n))
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(vector-set! pure i (make-heap ))
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(vector-set! impure i (make-heap ))
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(vector-set! reloc i (make-table))
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(loop (+ i 1)))))
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(scsh-for-each-stored-object
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(lambda (chunk)
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(format #t "Reading chunk number ~s" chunk))
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(lambda (chunk x len)
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(if debug
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(write x))
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(let* ((mutable (mutable? x))
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(heap (vector-ref (if mutable impure pure) chunk)))
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(table-set! (vector-ref reloc chunk) x (heap:length heap))
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(set-heap:objects heap (cons x (heap:objects heap)))
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(set-heap:length heap (+ len (heap:length heap)))
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(cond (debug
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(display (if mutable " mutable " " immutable "))
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(cond ((d-vector? x) (display " d-vector"))
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((vm-string? x) (display "vm-string"))
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(else (display " b-vector")))
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(let ((m (heap:length (vector-ref impure chunk)))
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(i (heap:length (vector-ref pure chunk))))
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(message " m" m "+i" i "=" (+ m i))))))
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(if (= (header-type (stob-header x)) (enum stob external))
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(table-set! externs
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(external-value x)
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(vm-string->string (external-name x))))
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)
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(lambda (chunk)
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(newline)))
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(let loop ((i 0))
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(cond ((not (= i n))
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(let ((p (vector-ref pure i))
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(i (vector-ref impure i)))
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(set-heap:objects p (reverse (heap:objects p)))
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(set-heap:objects i (reverse (heap:objects i))))
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(loop (+ i 1)))))
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(values pure impure reloc externs)))
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(define (write-c-header-file pure impure externs infile outfile prefix)
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(message "Writing header file")
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(call-with-output-file (string-append prefix ".h")
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(lambda (port)
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(format port "/* Static Heap File Automatically Generated~%")
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(format port " * by scsh/static.scm~%")
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(format port " * from ~a~%" infile)
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(format port " * to ~a~%" outfile)
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(format port " */~%")
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(let ((n (nchunks)))
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "extern const long p~s[~s];~%" i
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(quotient (heap:length (vector-ref pure i)) 4)))
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "extern long i~s[~s];~%" i
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(quotient (heap:length (vector-ref impure i)) 4))))
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(table-walk
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(lambda (address name)
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(format port "const extern ~a();~%" name))
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externs)
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)))
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(define (d-vector-for-each proc d-vector)
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(do ((i 0 (+ i 1)))
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((>= i (d-vector-length d-vector)))
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(proc (d-vector-ref d-vector i))))
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(define (write-c-image pure impure reloc externs prefix)
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(message "Writing pure c files")
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(scsh-write-c-image pure "p" "const " reloc externs prefix)
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(message "Writing impure c files")
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(scsh-write-c-image impure "i" "" reloc externs prefix))
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(define (scsh-write-c-image heap name const reloc externs prefix)
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(let ((n (nchunks)))
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(let chunk-loop ((c 0))
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(cond ((not (= c n))
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(format #t "Writing ~a-~a~s.c~%" prefix name c)
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(call-with-output-file
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(format #f "~a-~a~s.c" prefix name c)
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(lambda (port)
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(format port "#include \"~a.h\"~%" prefix)
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(format port "~a long ~a~s[]={~%" const name c)
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(let ((heap (vector-ref heap c)))
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(let heap-loop ((l (heap:objects heap)))
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(cond ((not (null? l))
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(scsh-emit-initializer (car l) reloc externs port)
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(heap-loop (cdr l))))))
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(display "};" port)
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(newline port)))
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(chunk-loop (+ 1 c)))))))
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(define (write-main-c-file start reloc prefix)
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(let ((n (nchunks)))
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(call-with-output-file (string-append prefix ".c")
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(lambda (port)
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(format port "#include \"~a.h\"~%" prefix)
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(format port "const long p_count = ~s;~%" n)
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(format port "const long i_count = ~s;~%" n)
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(format port "const long * const p_areas[~s] = {" n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "(const long *) &p~s, " i))
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(format port "};~%")
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(format port "long * const i_areas[~s] = {" n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "(long *) &i~s, " i))
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(format port "};~%")
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(format port "const long p_sizes[~s] = {" n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "sizeof(p~s), " i))
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(format port "};~%")
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(format port "const long i_sizes[~s] = {" n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "sizeof(i~s), " i))
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(format port "};~%")
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(display "const long entry = " port)
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(scsh-emit-descriptor start reloc port)
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(write-char #\; port)
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(newline port)))))
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(define (compile-c-files cc-command prefix)
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(let ((n (nchunks))
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(cc (line->list cc-command)))
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(message "Compiling main C file")
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(run (,@(append cc (list (format #f "~a.c" prefix)))))
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(do ((i 0 (+ i 1)))
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((= i n))
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(message "Compiling C file for pure chunk " i)
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(run (,@(append cc
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(list (format #f "~a-p~s.c" prefix i)))))
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(message "Compiling C file for impure chunk " i)
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(run (,@(append cc
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(list (format #f "~a-i~s.c" prefix i))))))))
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(define (archive-files ar-command outfile prefix)
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(let ((n (nchunks))
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(ar (line->list ar-command)))
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(message "Archiving object files")
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(run (,@(append
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ar
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(cons
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outfile
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(let loop ((i 0)
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(l '()))
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(cond ((not (= i n))
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(loop (+ i 1)
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(cons
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(format #f "~a-i~s.o" prefix i)
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(cons
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(format #f "~a-p~s.o" prefix i)
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l))))
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(else
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(reverse
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(cons
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(string-append prefix ".o")
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l)))))))))))
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(define (scsh-emit-initializer x reloc externs port)
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(write-hex port (stob-header x))
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(cond ((d-vector? x)
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(scsh-emit-d-vector-initializer x reloc port))
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((vm-string? x)
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(scsh-emit-vm-string-initializer x port))
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(else
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(scsh-emit-b-vector-initializer x reloc externs port)))
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(if *comments?*
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(begin (display " /* " port)
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(writex x port)
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(display " */" port)))
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(newline port))
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(define (scsh-emit-d-vector-initializer x reloc port)
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(let ((len (d-vector-length x)))
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(do ((i 0 (+ i 1)))
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((= i len))
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(scsh-emit-descriptor (d-vector-ref x i) reloc port)
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(write-char #\, port))))
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(define (scsh-emit-vm-string-initializer x port)
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(let* ((len (vm-string-length x)) ; end is jawilson style hack
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(end (- (cells->bytes (bytes->cells (+ len 1))) 4)))
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(do ((i 0 (+ i 4)))
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((= i end)
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(case (- len end)
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((0)
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(write-hex port 0))
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((1)
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(write-hex
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port
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(net-to-host-32 (arithmetic-shift
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(char->ascii (vm-string-ref x i)) 24))))
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((2)
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(write-hex
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port
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(net-to-host-32
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(bitwise-ior
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(arithmetic-shift
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(char->ascii (vm-string-ref x i)) 24)
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(arithmetic-shift
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(char->ascii (vm-string-ref x (+ i 1))) 16)))))
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((3)
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(write-hex
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port
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(net-to-host-32
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(bitwise-ior
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(bitwise-ior
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(arithmetic-shift
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(char->ascii (vm-string-ref x i)) 24)
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(arithmetic-shift
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(char->ascii (vm-string-ref x (+ i 1))) 16))
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(arithmetic-shift
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(char->ascii (vm-string-ref x (+ i 2))) 8)))))))
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(write-hex port
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(net-to-host-32 (bitwise-ior
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(bitwise-ior
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(arithmetic-shift
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(char->ascii (vm-string-ref x i)) 24)
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(arithmetic-shift
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(char->ascii (vm-string-ref x (+ i 1))) 16))
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(bitwise-ior
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(arithmetic-shift
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(char->ascii (vm-string-ref x (+ i 2))) 8)
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(char->ascii (vm-string-ref x (+ i 3))))))
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))))
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(define (scsh-emit-b-vector-initializer x reloc externs port)
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(cond ((and (code-vector? x)
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(table-ref externs x)) =>
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(lambda (name)
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(format port "(long) *~a," name)))
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(else
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(let* ((len (b-vector-length x)) ;end is jawilson style hack
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(end (- (cells->bytes (bytes->cells (+ len 1))) 4)))
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(do ((i 0 (+ i 4)))
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((= i end)
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(case (- len end)
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((1)
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(write-hex
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port
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(net-to-host-32 (arithmetic-shift (b-vector-ref x i) 24))))
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((2)
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(write-hex
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port
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(net-to-host-32
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(bitwise-ior
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(arithmetic-shift (b-vector-ref x i) 24)
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(arithmetic-shift (b-vector-ref x (+ i 1)) 16)))))
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((3)
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(write-hex
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port
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(net-to-host-32
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(bitwise-ior
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(bitwise-ior
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(arithmetic-shift (b-vector-ref x i) 24)
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(arithmetic-shift (b-vector-ref x (+ i 1)) 16))
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(arithmetic-shift (b-vector-ref x (+ i 2)) 8)))
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))))
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(write-hex
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port
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(net-to-host-32 (bitwise-ior
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(bitwise-ior
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(arithmetic-shift (b-vector-ref x i) 24)
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(arithmetic-shift (b-vector-ref x (+ i 1)) 16))
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(bitwise-ior
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(arithmetic-shift (b-vector-ref x (+ i 2)) 8)
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(b-vector-ref x (+ i 3))))))))
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)))
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(define (scsh-emit-descriptor x reloc port)
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(if (stob? x)
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(let ((n (chunk-number x)))
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(display "(long)(&" port)
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(if (immutable? x)
|
||
|
|
(display "p" port)
|
||
|
|
(display "i" port))
|
||
|
|
(display n port)
|
||
|
|
(display "[" port)
|
||
|
|
(display (quotient (table-ref (vector-ref reloc n) x) 4) port)
|
||
|
|
(display "])+7" port))
|
||
|
|
(format port
|
||
|
|
(if (negative? x) "-0x~a" "0x~a")
|
||
|
|
(number->string (abs x) 16))))
|
||
|
|
|
||
|
|
(define (scsh-for-each-stored-object chunk-start proc chunk-end)
|
||
|
|
(let ((limit (heap-pointer)))
|
||
|
|
(let chunk-loop ((addr (newspace-begin))
|
||
|
|
(i 0)
|
||
|
|
(chunk (+ (newspace-begin) *chunk-size*)))
|
||
|
|
(if (addr< addr limit)
|
||
|
|
(begin (chunk-start i)
|
||
|
|
(let loop ((addr addr))
|
||
|
|
(if (and (addr< addr limit)
|
||
|
|
(addr< addr chunk))
|
||
|
|
(let* ((d (fetch addr))
|
||
|
|
(len (addr1+ (header-a-units d))))
|
||
|
|
(if (not (header? d))
|
||
|
|
(warn "heap is in an inconsistent state" d))
|
||
|
|
(proc i (address->stob-descriptor (addr1+ addr)) len)
|
||
|
|
(loop (addr+ addr len)))
|
||
|
|
(begin (chunk-end i)
|
||
|
|
(chunk-loop addr
|
||
|
|
(+ i 1)
|
||
|
|
(+ chunk *chunk-size*))))))))))
|
||
|
|
|
||
|
|
(define (write-hex port x)
|
||
|
|
(format port
|
||
|
|
(if (negative? x) "-0x~a," "0x~a,")
|
||
|
|
(number->string (abs x) 16)))
|
||
|
|
|
||
|
|
;; takes a string and break it into a list at whitespace
|
||
|
|
;; rewrite using scsh stuff?
|
||
|
|
(define (line->list line)
|
||
|
|
(let ((len (string-length line)))
|
||
|
|
(let loop ((start 0)
|
||
|
|
(end 0)
|
||
|
|
(l '()))
|
||
|
|
(cond ((>= end len)
|
||
|
|
(if (= start end)
|
||
|
|
l
|
||
|
|
(append l (list (substring line start end)))))
|
||
|
|
((and (= start end)
|
||
|
|
(or (char=? (string-ref line start) (ascii->char 32))
|
||
|
|
(char=? (string-ref line start) (ascii->char 9))))
|
||
|
|
(loop (+ 1 start)
|
||
|
|
(+ 1 end)
|
||
|
|
l))
|
||
|
|
((or (char=? (string-ref line end) (ascii->char 32))
|
||
|
|
(char=? (string-ref line end) (ascii->char 9)))
|
||
|
|
(loop (+ 1 end)
|
||
|
|
(+ 1 end)
|
||
|
|
(append l (list (substring line start end)))))
|
||
|
|
((< end len)
|
||
|
|
(loop start
|
||
|
|
(+ 1 end)
|
||
|
|
l))
|
||
|
|
(else (error "unexpected case in line->list"))))))
|
||
|
|
|
||
|
|
;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
||
|
|
;;; Debugging
|
||
|
|
;;;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
|
||
|
|
|
||
|
|
(define (bin n)
|
||
|
|
(number->string n 2))
|
||
|
|
|
||
|
|
(define (oct n)
|
||
|
|
(number->string n 8))
|
||
|
|
|
||
|
|
(define (dec n)
|
||
|
|
(number->string n 10))
|
||
|
|
|
||
|
|
(define (hex n)
|
||
|
|
(number->string n 16))
|
||
|
|
|
||
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
|
; For example:
|
||
|
|
; (do-it 100000 "~/s48/debug/little.image" "little-heap.c")
|
||
|
|
;
|
||
|
|
; The first argument to do-it should be somewhat larger than the size,
|
||
|
|
; in bytes, of the image file to be converted (which you can obtain with
|
||
|
|
; "ls -l").
|
||
|
|
;
|
||
|
|
; If the image contains 0-length stored objects, then the .c file will
|
||
|
|
; have to be compiled by gcc, since 0-length arrays aren't allowed in
|
||
|
|
; ANSI C. This wouldn't be difficult to work around.
|
||
|
|
|
||
|
|
(define *comments?* #f)
|
||
|
|
|
||
|
|
; 800,000 bytes => 200,000 words => at least 100,000 objects
|
||
|
|
; 50 chunks => 16,000 bytes per chunk => 2,000 objects per chunk
|
||
|
|
(define *chunk-size* 10000)
|
||
|
|
|
||
|
|
(define (do-it bytes infile outfile)
|
||
|
|
(let ((start (init bytes infile)))
|
||
|
|
(call-with-output-file outfile
|
||
|
|
(lambda (port)
|
||
|
|
(format port "#define D(x) (long)(&x)+7~%")
|
||
|
|
(format port "#define H unsigned long~%")
|
||
|
|
(emit-area-declarations "p" immutable? "const " port)
|
||
|
|
(emit-area-declarations "i" mutable? "" port)
|
||
|
|
(emit-area-initializers "p" immutable? "const " port)
|
||
|
|
(emit-area-initializers "i" mutable? "" port)
|
||
|
|
(display "const long entry = " port)
|
||
|
|
(emit-descriptor start port)
|
||
|
|
(write-char #\; port)
|
||
|
|
(newline port)))))
|
||
|
|
|
||
|
|
(define (init bytes infile)
|
||
|
|
(create-memory (quotient bytes 2) quiescent) ;Output of ls -l
|
||
|
|
(initialize-heap (memory-begin) (memory-size))
|
||
|
|
(let ((start (read-image infile 0)))
|
||
|
|
(message (nchunks)
|
||
|
|
" chunks")
|
||
|
|
start))
|
||
|
|
|
||
|
|
(define (nchunks) (+ (chunk-number (heap-pointer)) 1))
|
||
|
|
|
||
|
|
; emit struct declarations for areas
|
||
|
|
|
||
|
|
(define (emit-area-declarations name in-area? const port)
|
||
|
|
(for-each-stored-object
|
||
|
|
(lambda (chunk)
|
||
|
|
(message name chunk " declaration")
|
||
|
|
(display "struct " port) (display name port) (display chunk port)
|
||
|
|
(display " {" port) (newline port))
|
||
|
|
(lambda (x)
|
||
|
|
(if (in-area? x)
|
||
|
|
(emit-declaration x port)))
|
||
|
|
(lambda (chunk)
|
||
|
|
(display "};" port)
|
||
|
|
(newline port)
|
||
|
|
(display const port)
|
||
|
|
(display "extern struct " port) (display name port) (display chunk port)
|
||
|
|
(write-char #\space port) (display name port) (display chunk port)
|
||
|
|
(write-char #\; port) (newline port)
|
||
|
|
chunk)))
|
||
|
|
|
||
|
|
(define (emit-declaration x port)
|
||
|
|
(display " H x" port)
|
||
|
|
(writex x port)
|
||
|
|
(cond ((d-vector? x)
|
||
|
|
(display "; long d" port)
|
||
|
|
(writex x port)
|
||
|
|
(write-char #\[ port)
|
||
|
|
(write (d-vector-length x) port))
|
||
|
|
((vm-string? x)
|
||
|
|
(display "; char d" port)
|
||
|
|
(writex x port)
|
||
|
|
(write-char #\[ port)
|
||
|
|
;; Ensure alignment (thanks Ian)
|
||
|
|
(write (cells->bytes (bytes->cells (b-vector-length x)))
|
||
|
|
port))
|
||
|
|
(else
|
||
|
|
(display "; unsigned char d" port)
|
||
|
|
(writex x port)
|
||
|
|
(write-char #\[ port)
|
||
|
|
;; Ensure alignment
|
||
|
|
(write (cells->bytes (bytes->cells (b-vector-length x)))
|
||
|
|
port)))
|
||
|
|
(display "];" port)
|
||
|
|
(if *comments?*
|
||
|
|
(begin (display " /* " port)
|
||
|
|
(display (enumerand->name (stob-type x) stob) port)
|
||
|
|
(display " */" port)))
|
||
|
|
(newline port))
|
||
|
|
|
||
|
|
; Emit initializers for areas
|
||
|
|
|
||
|
|
(define (emit-area-initializers name in-area? const port)
|
||
|
|
(for-each-stored-object
|
||
|
|
(lambda (chunk)
|
||
|
|
(message name chunk " initializer")
|
||
|
|
|
||
|
|
(display const port)
|
||
|
|
(display "struct " port) (display name port) (write chunk port)
|
||
|
|
(write-char #\space port) (display name port) (write chunk port)
|
||
|
|
(display " =" port) (newline port)
|
||
|
|
|
||
|
|
(write-char #\{ port) (newline port))
|
||
|
|
(lambda (x)
|
||
|
|
(if (in-area? x)
|
||
|
|
(emit-initializer x port)))
|
||
|
|
(lambda (chunk)
|
||
|
|
(display "};" port) (newline port)))
|
||
|
|
|
||
|
|
(let ((n (nchunks)))
|
||
|
|
(format port "const long ~a_count = ~s;~%" name n)
|
||
|
|
(format port "~a long * const ~a_areas[~s] = {" const name n)
|
||
|
|
(do ((i 0 (+ i 1)))
|
||
|
|
((= i n))
|
||
|
|
(format port "(~a long *)&~a~s, " const name i))
|
||
|
|
(format port "};~%const long ~a_sizes[~s] = {" name n)
|
||
|
|
(do ((i 0 (+ i 1)))
|
||
|
|
((= i n))
|
||
|
|
(format port "sizeof(~a~s), " name i))
|
||
|
|
(format port "};~%")))
|
||
|
|
|
||
|
|
|
||
|
|
(define (message . stuff)
|
||
|
|
(for-each display stuff) (newline))
|
||
|
|
|
||
|
|
(define (emit-initializer x port)
|
||
|
|
(display " " port)
|
||
|
|
(write (stob-header x) port)
|
||
|
|
(write-char #\, port)
|
||
|
|
(cond ((d-vector? x)
|
||
|
|
(emit-d-vector-initializer x port))
|
||
|
|
((vm-string? x)
|
||
|
|
(write-char #\" port)
|
||
|
|
(let ((len (vm-string-length x)))
|
||
|
|
(do ((i 0 (+ i 1)))
|
||
|
|
((= i len) (write-char #\" port))
|
||
|
|
(let ((c (vm-string-ref x i)))
|
||
|
|
(cond ((or (char=? c #\") (char=? c #\\))
|
||
|
|
(write-char #\\ port))
|
||
|
|
((char=? c #\newline)
|
||
|
|
(display "\\n\\" port)))
|
||
|
|
(write-char c port)))))
|
||
|
|
(else
|
||
|
|
(write-char #\{ port)
|
||
|
|
(let ((len (b-vector-length x)))
|
||
|
|
(do ((i 0 (+ i 1)))
|
||
|
|
((= i len) (write-char #\} port))
|
||
|
|
(write (b-vector-ref x i) port)
|
||
|
|
(write-char #\, port)))))
|
||
|
|
(write-char #\, port)
|
||
|
|
(if *comments?*
|
||
|
|
(begin (display " /* " port)
|
||
|
|
(writex x port)
|
||
|
|
(display " */" port)))
|
||
|
|
(newline port))
|
||
|
|
|
||
|
|
(define (emit-d-vector-initializer x port)
|
||
|
|
(write-char #\{ port)
|
||
|
|
(let ((len (d-vector-length x)))
|
||
|
|
(do ((i 0 (+ i 1)))
|
||
|
|
((= i len) (write-char #\} port))
|
||
|
|
(emit-descriptor (d-vector-ref x i) port)
|
||
|
|
(write-char #\, port))))
|
||
|
|
|
||
|
|
(define (emit-descriptor x port)
|
||
|
|
(if (stob? x)
|
||
|
|
(begin (if (immutable? x)
|
||
|
|
(display "D(p" port)
|
||
|
|
(display "D(i" port))
|
||
|
|
(display (chunk-number x) port)
|
||
|
|
(display ".x" port)
|
||
|
|
(writex x port)
|
||
|
|
(write-char #\) port))
|
||
|
|
(write x port)))
|
||
|
|
|
||
|
|
|
||
|
|
; Foo
|
||
|
|
|
||
|
|
(define (writex x port)
|
||
|
|
(write (quotient (- (- x (memory-begin)) 7) 4) port))
|
||
|
|
|
||
|
|
(define (chunk-number x)
|
||
|
|
(quotient (- (- x (memory-begin)) 7) *chunk-size*))
|
||
|
|
|
||
|
|
|
||
|
|
; Image traversal utility
|
||
|
|
|
||
|
|
(define (for-each-stored-object chunk-start proc chunk-end)
|
||
|
|
(let ((limit (heap-pointer)))
|
||
|
|
(let chunk-loop ((addr (newspace-begin))
|
||
|
|
(i 0)
|
||
|
|
(chunk (+ (newspace-begin) *chunk-size*)))
|
||
|
|
(if (addr< addr limit)
|
||
|
|
(begin (chunk-start i)
|
||
|
|
(let loop ((addr addr))
|
||
|
|
(if (and (addr< addr limit)
|
||
|
|
(addr< addr chunk))
|
||
|
|
(let ((d (fetch addr)))
|
||
|
|
(if (not (header? d))
|
||
|
|
(warn "heap is in an inconsistent state" d))
|
||
|
|
(proc (address->stob-descriptor (addr1+ addr)))
|
||
|
|
(loop (addr1+ (addr+ addr (header-a-units d)))))
|
||
|
|
(begin (chunk-end i)
|
||
|
|
(chunk-loop addr
|
||
|
|
(+ i 1)
|
||
|
|
(+ chunk *chunk-size*))))))))))
|
||
|
|
|
||
|
|
(define (mutable? x) (not (immutable? x)))
|