lisp/emacs-lisp/tcover-unsafep.el

   1 ;;;; testcover-unsafep.el -- Use testcover to test unsafep's code coverage
   2
   3 ;; Copyright (C) 2002-2017 Free Software Foundation, Inc.
   4
   5 ;; Author: Jonathan Yavner <jyavner@engineer.com>
   6 ;; Maintainer: Jonathan Yavner <jyavner@engineer.com>
   7 ;; Keywords: safety lisp utility
   8 ;; Package: testcover
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software: you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation, either version 3 of the License, or
  15 ;; (at your option) any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  24
  25 (require 'testcover)
  26
  27 (defvar safe-functions)
  28
  29 ;;;These forms are all considered safe
  30 (defconst testcover-unsafep-safe
  31   '(((lambda (x) (* x 2)) 14)
  32     (apply 'cdr (mapcar (lambda (x) (car x)) y))
  33     (cond ((= x 4) 5) (t 27))
  34     (condition-case x (car y) (error (car x)))
  35     (dolist (x y) (message "here: %s" x))
  36     (dotimes (x 14 (* x 2)) (message "here: %d" x))
  37     (let (x) (dolist (y '(1 2 3) (1+ y)) (push y x)))
  38     (let (x) (apply (lambda (x) (* x 2)) 14))
  39     (let ((x '(2))) (push 1 x) (pop x) (add-to-list 'x 2))
  40     (let ((x 1) (y 2)) (setq x (+ x y)))
  41     (let ((x 1)) (let ((y (+ x 3))) (* x y)))
  42     (let* nil (current-time))
  43     (let* ((x 1) (y (+ x 3))) (* x y))
  44     (mapcar (lambda (x &optional y &rest z) (setq y (+ x 2)) (* y 3)) '(1 2 3))
  45     (mapconcat #'(lambda (var) (propertize var 'face 'bold)) '("1" "2") ", ")
  46     (setq buffer-display-count 14 mark-active t)
  47     ;;This is not safe if you insert it into a buffer!
  48     (propertize "x" 'display '(height (progn (delete-file "x") 1))))
  49   "List of forms that `unsafep' should decide are safe.")
  50
  51 ;;;These forms are considered unsafe
  52 (defconst testcover-unsafep-unsafe
  53   '(( (add-to-list x y)
  54       . (unquoted x))
  55     ( (add-to-list y x)
  56       . (unquoted y))
  57     ( (add-to-list 'y x)
  58       . (global-variable y))
  59     ( (not (delete-file "unsafep.el"))
  60       . (function delete-file))
  61     ( (cond (t (aset local-abbrev-table 0 0)))
  62       . (function aset))
  63     ( (cond (t (setq unsafep-vars "")))
  64       . (risky-local-variable unsafep-vars))
  65     ( (condition-case format-alist 1)
  66       . (risky-local-variable format-alist))
  67     ( (condition-case x 1 (error (setq format-alist "")))
  68       . (risky-local-variable format-alist))
  69     ( (dolist (x (sort globalvar 'car)) (princ x))
  70       . (function sort))
  71     ( (dotimes (x 14) (delete-file "x"))
  72       . (function delete-file))
  73     ( (let ((post-command-hook "/tmp/")) 1)
  74       . (risky-local-variable post-command-hook))
  75     ( (let ((x (delete-file "x"))) 2)
  76       . (function delete-file))
  77     ( (let (x) (add-to-list 'x (delete-file "x")))
  78       . (function delete-file))
  79     ( (let (x) (condition-case y (setq x 1 z 2)))
  80       . (global-variable z))
  81     ( (let (x) (condition-case z 1 (error (delete-file "x"))))
  82       . (function delete-file))
  83     ( (let (x) (mapc (lambda (x) (setcar x 1)) '((1 . 2) (3 . 4))))
  84       . (function setcar))
  85     ( (let (y) (push (delete-file "x") y))
  86       . (function delete-file))
  87     ( (let* ((x 1)) (setq y 14))
  88       . (global-variable y))
  89     ( (mapc 'car (list '(1 . 2) (cons 3 4) (kill-buffer "unsafep.el")))
  90       . (function kill-buffer))
  91     ( (mapcar x y)
  92       . (unquoted x))
  93     ( (mapcar (lambda (x) (rename-file x "x")) '("unsafep.el"))
  94       . (function rename-file))
  95     ( (mapconcat x1 x2 " ")
  96       . (unquoted x1))
  97     ( (pop format-alist)
  98       . (risky-local-variable format-alist))
  99     ( (push 1 format-alist)
 100       . (risky-local-variable format-alist))
 101     ( (setq buffer-display-count (delete-file "x"))
 102       . (function delete-file))
 103     ;;These are actually safe (they signal errors)
 104     ( (apply '(x) '(1 2 3))
 105       . (function (x)))
 106     ( (let (((x))) 1)
 107       . (variable (x)))
 108     ( (let (1) 2)
 109       . (variable 1))
 110     )
 111   "A-list of (FORM . REASON)... that`unsafep' should decide are unsafe.")
 112
 113 (declare-function unsafep-function "unsafep" (fun))
 114
 115 ;;;#########################################################################
 116 (defun testcover-unsafep ()
 117   "Executes all unsafep tests and displays the coverage results."
 118   (interactive)
 119   (testcover-unmark-all "unsafep.el")
 120   (testcover-start "unsafep.el")
 121   (let (save-functions)
 122     (dolist (x testcover-unsafep-safe)
 123       (if (unsafep x)
 124           (error "%S should be safe" x)))
 125     (dolist (x testcover-unsafep-unsafe)
 126       (if (not (equal (unsafep (car x)) (cdr x)))
 127           (error "%S should be unsafe: %s" (car x) (cdr x))))
 128     (setq safe-functions t)
 129     (if (or (unsafep '(delete-file "x"))
 130             (unsafep-function 'delete-file))
 131         (error "safe-functions=t should allow delete-file"))
 132     (setq safe-functions '(setcar))
 133     (if (unsafep '(setcar x 1))
 134         (error "safe-functions=(setcar) should allow setcar"))
 135     (if (not (unsafep '(setcdr x 1)))
 136         (error "safe-functions=(setcar) should not allow setcdr")))
 137   (testcover-mark-all "unsafep.el")
 138   (testcover-end "unsafep.el")
 139   (message "Done"))
 140
 141 ;; testcover-unsafep.el ends here.