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;;; Guile VM debugging facilities
;;; Copyright (C) 2001, 2009, 2010, 2011, 2013 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 (system vm inspect)
#:use-module (system base pmatch)
#:use-module (system base syntax)
#:use-module (system vm vm)
#:use-module (system vm frame)
#:use-module (system vm disassembler)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 pretty-print)
#:use-module (ice-9 format)
#:use-module (system vm program)
#:export (inspect))
(define (reverse-hashq h)
(let ((ret (make-hash-table)))
(hash-for-each
(lambda (k v)
(hashq-set! ret v (cons k (hashq-ref ret v '()))))
h)
ret))
(define (catch-bad-arguments thunk bad-args-thunk)
(catch 'wrong-number-of-args
(lambda ()
(catch 'keyword-argument-error
thunk
(lambda (k . args)
(bad-args-thunk))))
(lambda (k . args)
(bad-args-thunk))))
(define (read-args prompt)
(define (read* reader)
(repl-reader prompt reader))
(define (next)
(read* read-char))
(define (cmd chr)
(cond
((eof-object? chr) (list chr))
((char=? chr #\newline) (cmd (next)))
((char-whitespace? chr) (cmd (next)))
(else
(unread-char chr)
(let ((tok (read* read)))
(args (list tok) (next))))))
(define (args out chr)
(cond
((eof-object? chr) (reverse out))
((char=? chr #\newline) (reverse out))
((char-whitespace? chr) (args out (next)))
(else
(unread-char chr)
(let ((tok (read* read)))
(args (cons tok out) (next))))))
(cmd (next)))
;;;
;;; Inspector
;;;
(define (inspect x)
(define-syntax-rule (define-command ((mod cname alias ...) . args)
body ...)
(define cname
(let ((c (lambda* args body ...)))
(set-procedure-property! c 'name 'cname)
(module-define! mod 'cname c)
(module-add! mod 'alias (module-local-variable mod 'cname))
...
c)))
(let ((commands (make-module)))
(define (prompt)
(format #f "~20@y inspect> " x))
(define-command ((commands quit q continue cont c))
"Quit the inspector."
(throw 'quit))
(define-command ((commands print p))
"Print the current object using `pretty-print'."
(pretty-print x))
(define-command ((commands write w))
"Print the current object using `write'."
(write x))
(define-command ((commands display d))
"Print the current object using `display'."
(display x))
(define-command ((commands disassemble x))
"Disassemble the current object, which should be a procedure."
(catch #t
(lambda ()
(disassemble-program x))
(lambda args
(format #t "Error disassembling object: ~a\n" args))))
(define-command ((commands help h ?) #:optional cmd)
"Show this help message."
(let ((rhash (reverse-hashq (module-obarray commands))))
(define (help-cmd cmd)
(let* ((v (module-local-variable commands cmd))
(p (variable-ref v))
(canonical-name (procedure-name p)))
;; la la la
(format #t "~a~{ ~:@(~a~)~}~?~%~a~&~%"
canonical-name (program-lambda-list p)
"~#[~:;~40t(aliases: ~@{~a~^, ~})~]"
(delq canonical-name (hashq-ref rhash v))
(procedure-documentation p))))
(cond
(cmd
(cond
((and (symbol? cmd) (module-local-variable commands cmd))
(help-cmd cmd))
(else
(format #t "Invalid command ~s.~%" cmd)
(format #t "Try `help' for a list of commands~%"))))
(else
(let ((names (sort
(hash-map->list
(lambda (k v)
(procedure-name (variable-ref k)))
rhash)
(lambda (x y)
(string<? (symbol->string x)
(symbol->string y))))))
(format #t "Available commands:~%~%")
(for-each help-cmd names))))))
(define (handle cmd . args)
(cond
((and (symbol? cmd)
(module-local-variable commands cmd))
=> (lambda (var)
(let ((proc (variable-ref var)))
(catch-bad-arguments
(lambda ()
(apply (variable-ref var) args))
(lambda ()
(format (current-error-port)
"Invalid arguments to ~a. Try `help ~a'.~%"
(procedure-name proc) (procedure-name proc)))))))
; ((and (integer? cmd) (exact? cmd))
; (nth cmd))
((eof-object? cmd)
(newline)
(throw 'quit))
(else
(format (current-error-port)
"~&Unknown command: ~a. Try `help'.~%" cmd)
*unspecified*)))
(catch 'quit
(lambda ()
(let loop ()
(apply
handle
(save-module-excursion
(lambda ()
(set-current-module commands)
(read-args prompt))))
(loop)))
(lambda (k . args)
(apply values args)))))
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