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comparison lisp/utils/find-gc.el @ 0:376386a54a3c r19-14

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Import from CVS: tag r19-14
author cvs
date Mon, 13 Aug 2007 08:45:50 +0200
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-1:000000000000 0:376386a54a3c
1 ;;; find-gc.el --- detect functions that call the garbage collector
2
3 ;; Copyright (C) 1992 Free Software Foundation, Inc.
4
5 ;; Maintainer: FSF
6 ;; Keywords: maint
7
8 ;; This file is part of XEmacs.
9
10 ;; XEmacs is free software; you can redistribute it and/or modify it
11 ;; under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
14
15 ;; XEmacs is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
19
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
22 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
23
24 ;;; Synched up with: FSF 19.30.
25
26 ;;; #### before this is really usable, it should be rewritten to call
27 ;;; Makefile to compile the files.
28
29 ;;; Commentary:
30
31 ;;; Produce in unsafe-list the set of all functions that may invoke GC.
32 ;;; This expects the Emacs sources to live in emacs-source-directory.
33 ;;; It creates a temporary working directory /tmp/esrc.
34
35 ;;; Code:
36
37 ;; Set this to point to your XEmacs source directory.
38 (setq emacs-source-directory "/net/prosper/opt/xemacs/editor/src")
39
40 ;; Set this to the include directories neeed for compilation.
41 (setq include-directives "-I/net/prosper/opt/xemacs/editor/src -I/usr/dt/include -I/net/prosper/opt/SUNWmotif/include -I/net/prosper/opt/xemacs/editor/import/xpm/include -I/net/prosper/opt/xemacs/editor/import/include -I/usr/demo/SOUND/include -I/usr/openwin/include -I/usr/openwin/include/desktop -I/usr/openwin/include/desktop -I/net/prosper/opt/xemacs/editor/src/../lwlib -g -v -DNeedFunctionPrototypes -xildoff -I/usr/dt/include -I/net/prosper/opt/SUNWmotif/include -I/net/prosper/opt/xemacs/editor/import/xpm/include -I/net/prosper/opt/xemacs/editor/import/include -I/usr/demo/SOUND/include -I/usr/demo/SOUND/include")
42
43 ;; Set this to the source files you want to check.
44 (setq source-files
45 '(
46 "EmacsFrame.c" "EmacsManager.c" "EmacsShell.c" "abbrev.c" "alloc.c"
47 "blocktype.c" "buffer.c" "bytecode.c" "callint.c" "callproc.c" "casefiddle.c"
48 "casetab.c" "cm.c" "cmds.c" "data.c" "debug.c" "device-stream.c"
49 "device-tty.c" "device-x.c" "device.c" "dired.c" "doc.c" "doprnt.c"
50 "dynarr.c""editfns.c" "elhash.c" "emacs.c" "eval.c" "event-Xt.c"
51 "event-stream.c" "event-tty.c" "events.c" "extents.c" "faces.c" "fileio.c"
52 "filelock.c" "filemode.c" "floatfns.c" "fns.c" "font-lock.c" "frame-tty.c"
53 "frame-x.c" "frame.c" "getloadavg.c" "glyphs.c" "gmalloc.c" "hash.c"
54 "indent.c" "insdel.c" "intl.c" "keyboard.c" "keymap.c" "lastfile.c" "lread.c"
55 "lstream.c" "macros.c" "marker.c" "md5.c" "menubar-x.c" "menubar.c"
56 "minibuf.c" "objects-x.c" "objects.c" "opaque.c" "print.c" "process.c"
57 "pure.c" "redisplay-output.c" "redisplay-tty.c" "redisplay-x.c" "redisplay.c"
58 "regex.c" "scrollbar.c" "search.c" "sound.c" "specifier.c" "sunplay.c"
59 "sunpro.c" "symbols.c" "syntax.c" "sysdep.c" "terminfo.c" "toolbar-x.c"
60 "toolbar.c" "tooltalk.c" "undo.c" "unexsol2.c" "vm-limit.c" "window.c"
61 "xgccache.c" "xselect.c"))
62
63 ;;;
64
65 (defun find-gc-unsafe ()
66 (trace-call-tree nil)
67 (trace-use-tree)
68 (find-unsafe-funcs 'Fgarbage_collect)
69 (setq unsafe-list (sort unsafe-list
70 (function (lambda (x y)
71 (string-lessp (car x) (car y))))))
72 (princ (format "%s\n" unsafe-list))
73 (setq unsafe-list nil)
74 (find-unsafe-funcs 'Fgarbage_collect_1)
75 (setq unsafe-list (sort unsafe-list
76 (function (lambda (x y)
77 (string-lessp (car x) (car y))))))
78 (princ (format "%s\n" unsafe-list)))
79
80
81 ;;; This does a depth-first search to find all functions that can
82 ;;; ultimately call the function "target". The result is an a-list
83 ;;; in unsafe-list; the cars are the unsafe functions, and the cdrs
84 ;;; are (one of) the unsafe functions that these functions directly
85 ;;; call.
86
87 (defun find-unsafe-funcs (target)
88 (setq unsafe-list (list (list target)))
89 (trace-unsafe target))
90
91 (defun trace-unsafe (func)
92 (let ((used (assq func subrs-used)))
93 (or used
94 (error "No subrs-used for %s" (car unsafe-list)))
95 (while (setq used (cdr used))
96 (or (assq (car used) unsafe-list)
97 (memq (car used) noreturn-list)
98 (progn
99 (setq unsafe-list (cons (cons (car used) func) unsafe-list))
100 (trace-unsafe (car used)))))))
101
102
103 ;;; Functions on this list are safe, even if they appear to be able
104 ;;; to call the target.
105
106 (setq noreturn-list '( signal_error error Fthrow wrong_type_argument ))
107
108
109 ;;; This produces an a-list of functions in subrs-called. The cdr of
110 ;;; each entry is a list of functions which the function in car calls.
111
112 (defun trace-call-tree (&optional already-setup)
113 (or already-setup
114 (progn
115 (princ (format "Setting up directories...\n"))
116 ;; Gee, wouldn't a built-in "system" function be handy here.
117 (call-process "sh" nil nil nil "-c" "rm -rf /tmp/esrc")
118 (call-process "sh" nil nil nil "-c" "mkdir /tmp/esrc")
119 (call-process "sh" nil nil nil "-c"
120 (format "ln -s %s/*.[ch] /tmp/esrc"
121 emacs-source-directory))))
122 (save-excursion
123 (set-buffer (get-buffer-create "*Trace Call Tree*"))
124 (setq subrs-called nil)
125 (let ((case-fold-search nil)
126 (files source-files)
127 name entry)
128 (while files
129 (princ (format "Compiling %s...\n" (car files)))
130 (call-process "sh" nil nil nil "-c"
131 (format "cd /tmp/esrc; gcc -dr -c %s /tmp/esrc/%s -o /dev/null"
132 include-directives (car files)))
133 (erase-buffer)
134 (insert-file-contents (concat "/tmp/esrc/" (car files) ".rtl"))
135 (while (re-search-forward ";; Function \\|(call_insn " nil t)
136 (if (= (char-after (- (point) 3)) ?o)
137 (progn
138 (looking-at "[a-zA-Z0-9_]+")
139 (setq name (intern (buffer-substring (match-beginning 0)
140 (match-end 0))))
141 (princ (format "%s : %s\n" (car files) name))
142 (setq entry (list name)
143 subrs-called (cons entry subrs-called)))
144 (if (looking-at ".*\n?.*\"\\([A-Za-z0-9_]+\\)\"")
145 (progn
146 (setq name (intern (buffer-substring (match-beginning 1)
147 (match-end 1))))
148 (or (memq name (cdr entry))
149 (setcdr entry (cons name (cdr entry))))))))
150 ;;(delete-file (concat "/tmp/esrc/" (car files) ".rtl"))
151 (setq files (cdr files))))))
152
153
154 ;;; This produces an inverted a-list in subrs-used. The cdr of each
155 ;;; entry is a list of functions that call the function in car.
156
157 (defun trace-use-tree ()
158 (setq subrs-used (mapcar 'list (mapcar 'car subrs-called)))
159 (let ((ptr subrs-called)
160 p2 found)
161 (while ptr
162 (setq p2 (car ptr))
163 (while (setq p2 (cdr p2))
164 (if (setq found (assq (car p2) subrs-used))
165 (setcdr found (cons (car (car ptr)) (cdr found)))))
166 (setq ptr (cdr ptr)))))
167
168 ;;; find-gc.el ends here