217 lines
6.2 KiB
Scheme
217 lines
6.2 KiB
Scheme
; Copyright (c) 1993-1999 by Richard Kelsey and Jonathan Rees. See file COPYING.
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; This little utility converts a heap image into a C file.
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;
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; For example:
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; (do-it 100000 "~/s48/debug/little.image" "little-heap.c")
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;
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; The first argument to do-it should be somewhat larger than the size,
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; in bytes, of the image file to be converted (which you can obtain with
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; "ls -l").
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;
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; If the image contains 0-length stored objects, then the .c file will
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; have to be compiled by gcc, since 0-length arrays aren't allowed in
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; ANSI C. This wouldn't be difficult to work around.
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;
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; For loading instructions, see load-static.scm.
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(define *comments?* #f)
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; 800,000 bytes => 200,000 words => at least 100,000 objects
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; 50 chunks => 16,000 bytes per chunk => 2,000 objects per chunk
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(define *chunk-size* 10000)
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(define (do-it bytes infile outfile)
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(let ((start (init bytes infile)))
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(call-with-output-file outfile
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(lambda (port)
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(format port "#define D(x) (long)(&x)+7~%")
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(format port "#define H unsigned long~%")
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(emit-area-declarations "p" immutable? "const " port)
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(emit-area-declarations "i" mutable? "" port)
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(emit-area-initializers "p" immutable? "const " port)
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(emit-area-initializers "i" mutable? "" port)
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(display "const long entry = " port)
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(emit-descriptor start port)
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(write-char #\; port)
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(newline port)))))
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(define (init bytes infile)
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(create-memory (quotient bytes 2) quiescent) ;Output of ls -l
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(initialize-heap (memory-begin) (memory-size))
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(let ((start (read-image infile 0)))
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(message (nchunks)
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" chunks")
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start))
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(define (nchunks) (+ (chunk-number (heap-pointer)) 1))
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; emit struct declarations for areas
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(define (emit-area-declarations name in-area? const port)
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(for-each-stored-object
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(lambda (chunk)
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(message name chunk " declaration")
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(display "struct " port) (display name port) (display chunk port)
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(display " {" port) (newline port))
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(lambda (x)
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(if (in-area? x)
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(emit-declaration x port)))
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(lambda (chunk)
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(display "};" port)
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(newline port)
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(display const port)
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(display "extern struct " port) (display name port) (display chunk port)
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(write-char #\space port) (display name port) (display chunk port)
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(write-char #\; port) (newline port)
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chunk)))
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(define (emit-declaration x port)
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(display " H x" port)
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(writex x port)
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(cond ((d-vector? x)
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(display "; long d" port)
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(writex x port)
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(write-char #\[ port)
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(write (d-vector-length x) port))
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((vm-string? x)
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(display "; char d" port)
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(writex x port)
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(write-char #\[ port)
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;; Ensure alignment (thanks Ian)
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(write (cells->bytes (bytes->cells (b-vector-length x)))
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port))
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(else
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(display "; unsigned char d" port)
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(writex x port)
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(write-char #\[ port)
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;; Ensure alignment
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(write (cells->bytes (bytes->cells (b-vector-length x)))
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port)))
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(display "];" port)
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(if *comments?*
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(begin (display " /* " port)
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(display (enumerand->name (stob-type x) stob) port)
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(display " */" port)))
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(newline port))
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; Emit initializers for areas
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(define (emit-area-initializers name in-area? const port)
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(for-each-stored-object
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(lambda (chunk)
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(message name chunk " initializer")
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(display const port)
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(display "struct " port) (display name port) (write chunk port)
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(write-char #\space port) (display name port) (write chunk port)
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(display " =" port) (newline port)
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(write-char #\{ port) (newline port))
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(lambda (x)
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(if (in-area? x)
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(emit-initializer x port)))
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(lambda (chunk)
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(display "};" port) (newline port)))
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(let ((n (nchunks)))
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(format port "const long ~a_count = ~s;~%" name n)
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(format port "~a long * const ~a_areas[~s] = {" const name n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "(~a long *)&~a~s, " const name i))
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(format port "};~%const long ~a_sizes[~s] = {" name n)
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(do ((i 0 (+ i 1)))
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((= i n))
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(format port "sizeof(~a~s), " name i))
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(format port "};~%")))
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(define (message . stuff)
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(for-each display stuff) (newline))
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(define (emit-initializer x port)
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(display " " port)
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(write (stob-header x) port)
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(write-char #\, port)
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(cond ((d-vector? x)
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(emit-d-vector-initializer x port))
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((vm-string? x)
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(write-char #\" port)
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(let ((len (vm-string-length x)))
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(do ((i 0 (+ i 1)))
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((= i len) (write-char #\" port))
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(let ((c (vm-string-ref x i)))
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(cond ((or (char=? c #\") (char=? c #\\))
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(write-char #\\ port))
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((char=? c #\newline)
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(display "\\n\\" port)))
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(write-char c port)))))
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(else
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(write-char #\{ port)
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(let ((len (b-vector-length x)))
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(do ((i 0 (+ i 1)))
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((= i len) (write-char #\} port))
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(write (b-vector-ref x i) port)
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(write-char #\, port)))))
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(write-char #\, 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 (emit-d-vector-initializer x port)
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(write-char #\{ 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) (write-char #\} port))
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(emit-descriptor (d-vector-ref x i) port)
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(write-char #\, port))))
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(define (emit-descriptor x port)
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(if (stob? x)
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(begin (if (immutable? x)
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(display "D(p" port)
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(display "D(i" port))
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(display (chunk-number x) port)
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(display ".x" port)
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(writex x port)
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(write-char #\) port))
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(write x port)))
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; Foo
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(define (writex x port)
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(write (quotient (- (- x (memory-begin)) 7) 4) port))
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(define (chunk-number x)
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(quotient (- (- x (memory-begin)) 7) *chunk-size*))
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; Image traversal utility
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(define (for-each-stored-object chunk-start proc chunk-end)
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(let ((limit (heap-pointer)))
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(let chunk-loop ((addr (newspace-begin))
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(i 0)
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(chunk (+ (newspace-begin) *chunk-size*)))
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(if (addr< addr limit)
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(begin (chunk-start i)
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(let loop ((addr addr))
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(if (and (addr< addr limit)
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(addr< addr chunk))
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(let ((d (fetch addr)))
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(if (not (header? d))
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(warn "heap is in an inconsistent state" d))
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(proc (address->stob-descriptor (addr1+ addr)))
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(loop (addr1+ (addr+ addr (header-a-units d)))))
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(begin (chunk-end i)
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(chunk-loop addr
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(+ i 1)
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(+ chunk *chunk-size*))))))))))
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(define (mutable? x) (not (immutable? x)))
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