Mercurial > urweb

annotate src/mono_shake.sml @ 1710:540df112ff62

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Remove string-valued style attribute, which may allow injection attacks
author Adam Chlipala <adam@chlipala.net>
date Sun, 15 Apr 2012 12:40:53 -0400
parents 218e2a9a53d0
children c1e3805e604e
rev   line source
adamc@134 1 (* Copyright (c) 2008, Adam Chlipala
adamc@134 2 * All rights reserved.
adamc@134 3 *
adamc@134 4 * Redistribution and use in source and binary forms, with or without
adamc@134 5 * modification, are permitted provided that the following conditions are met:
adamc@134 6 *
adamc@134 7 * - Redistributions of source code must retain the above copyright notice,
adamc@134 8 * this list of conditions and the following disclaimer.
adamc@134 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@134 10 * this list of conditions and the following disclaimer in the documentation
adamc@134 11 * and/or other materials provided with the distribution.
adamc@134 12 * - The names of contributors may not be used to endorse or promote products
adamc@134 13 * derived from this software without specific prior written permission.
adamc@134 14 *
adamc@134 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@134 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@134 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@134 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@134 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@134 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@134 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@134 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@134 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@134 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@134 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@134 26 *)
adamc@134 27
adamc@134 28 (* Remove unused definitions from a file *)
adamc@134 29
adamc@134 30 structure MonoShake :> MONO_SHAKE = struct
adamc@134 31
adamc@134 32 open Mono
adamc@134 33
adamc@134 34 structure U = MonoUtil
adamc@134 35
adamc@134 36 structure IS = IntBinarySet
adamc@134 37 structure IM = IntBinaryMap
adamc@134 38
adamc@134 39 type free = {
adamc@134 40 con : IS.set,
adamc@134 41 exp : IS.set
adamc@134 42 }
adamc@134 43
adamc@134 44 fun shake file =
adamc@134 45 let
adamc@808 46 val (cdef, edef) = foldl (fn ((DDatatype dts, _), (cdef, edef)) =>
adamc@808 47 (foldl (fn ((_, n, xncs), cdef) => IM.insert (cdef, n, xncs)) cdef dts, edef)
adamc@178 48 | ((DVal (_, n, t, e, _), _), (cdef, edef)) =>
adamc@178 49 (cdef, IM.insert (edef, n, (t, e)))
adamc@134 50 | ((DValRec vis, _), (cdef, edef)) =>
adamc@134 51 (cdef, foldl (fn ((_, n, t, e, _), edef) => IM.insert (edef, n, (t, e))) edef vis)
adamc@271 52 | ((DExport _, _), acc) => acc
adamc@273 53 | ((DTable _, _), acc) => acc
adamc@338 54 | ((DSequence _, _), acc) => acc
adamc@754 55 | ((DView _, _), acc) => acc
adamc@569 56 | ((DDatabase _, _), acc) => acc
adamc@718 57 | ((DJavaScript _, _), acc) => acc
adamc@725 58 | ((DCookie _, _), acc) => acc
adamc@1073 59 | ((DStyle _, _), acc) => acc
adamc@1199 60 | ((DTask _, _), acc) => acc
adam@1294 61 | ((DPolicy _, _), acc) => acc
adam@1294 62 | ((DOnError _, _), acc) => acc)
adamc@134 63 (IM.empty, IM.empty) file
adamc@134 64
adamc@164 65 fun typ (c, s) =
adamc@164 66 case c of
adamc@196 67 TDatatype (n, _) =>
adamc@164 68 if IS.member (#con s, n) then
adamc@164 69 s
adamc@164 70 else
adamc@178 71 let
adamc@178 72 val s' = {exp = #exp s,
adamc@178 73 con = IS.add (#con s, n)}
adamc@178 74 in
adamc@178 75 case IM.find (cdef, n) of
adamc@178 76 NONE => s'
adamc@178 77 | SOME xncs => foldl (fn ((_, _, to), s) =>
adamc@178 78 case to of
adamc@178 79 NONE => s
adamc@178 80 | SOME t => shakeTyp s t)
adamc@178 81 s' xncs
adamc@178 82 end
adamc@164 83 | _ => s
adamc@134 84
adamc@178 85 and shakeTyp s = U.Typ.fold typ s
adamc@178 86
adamc@134 87 fun exp (e, s) =
adamc@134 88 case e of
adamc@134 89 ENamed n =>
adamc@134 90 if IS.member (#exp s, n) then
adamc@134 91 s
adamc@134 92 else
adamc@134 93 let
adamc@134 94 val s' = {exp = IS.add (#exp s, n),
adamc@134 95 con = #con s}
adamc@134 96 in
adamc@134 97 case IM.find (edef, n) of
adamc@134 98 NONE => s'
adamc@134 99 | SOME (t, e) => shakeExp s' e
adamc@134 100 end
adamc@134 101 | _ => s
adamc@134 102
adamc@134 103 and shakeExp s = U.Exp.fold {typ = typ, exp = exp} s
adamc@134 104
kkallio@1535 105 fun usedVars (cs, es) e =
kkallio@1535 106 let
kkallio@1535 107 val {con = cs', exp = es'} = shakeExp {con = cs, exp = es} e
kkallio@1535 108 in
kkallio@1535 109 (cs', es')
kkallio@1535 110 end
kkallio@1535 111
kkallio@1535 112 val (page_cs, page_es) =
kkallio@1535 113 List.foldl
kkallio@1535 114 (fn ((DExport (_, _, n, _, _, _), _), (page_cs, page_es)) => (page_cs, IS.add (page_es, n))
kkallio@1535 115 | ((DDatabase {expunge = n1, initialize = n2, ...}, _), (page_cs, page_es)) =>
kkallio@1535 116 (page_cs, IS.addList (page_es, [n1, n2]))
kkallio@1535 117 | ((DTask (e1, e2), _), st) => usedVars (usedVars st e2) e1
adam@1623 118 | ((DTable (_, xts, e1, e2), _), st) => usedVars (usedVars (usedVars st e1) e2)
adam@1623 119 (ERecord (map (fn (x, t) => (x, (ERecord [], #2 e1), t)) xts), #2 e1)
kkallio@1535 120 | ((DView (_, _, e), _), st) => usedVars st e
kkallio@1535 121 | ((DPolicy pol, _), st) =>
kkallio@1535 122 let
kkallio@1535 123 val e1 = case pol of
kkallio@1535 124 PolClient e1 => e1
kkallio@1535 125 | PolInsert e1 => e1
kkallio@1535 126 | PolDelete e1 => e1
kkallio@1535 127 | PolUpdate e1 => e1
kkallio@1535 128 | PolSequence e1 => e1
kkallio@1535 129 in
kkallio@1535 130 usedVars st e1
kkallio@1535 131 end
kkallio@1535 132 | ((DOnError n, _), (page_cs, page_es)) => (page_cs, IS.add (page_es, n))
kkallio@1535 133 | (_, st) => st) (IS.empty, IS.empty) file
kkallio@1535 134
adamc@1073 135 val s = {con = page_cs, exp = page_es}
adamc@134 136
adamc@1073 137 val s = IS.foldl (fn (n, s) =>
adamc@1073 138 case IM.find (cdef, n) of
adamc@1073 139 NONE => raise Fail "MonoShake: Couldn't find 'datatype'"
adamc@1073 140 | SOME xncs => foldl (fn ((_, _, SOME c), s) => shakeTyp s c
adamc@1073 141 | _ => s) s xncs) s page_cs
adamc@1073 142
adamc@1073 143 val s = IS.foldl (fn (n, s) =>
adamc@1073 144 case IM.find (edef, n) of
adamc@1073 145 NONE => raise Fail "MonoShake: Couldn't find 'val'"
adamc@1073 146 | SOME (t, e) => shakeExp s e) s page_es
adamc@134 147 in
adamc@808 148 List.filter (fn (DDatatype dts, _) => List.exists (fn (_, n, _) => IS.member (#con s, n)) dts
adamc@164 149 | (DVal (_, n, _, _, _), _) => IS.member (#exp s, n)
adamc@134 150 | (DValRec vis, _) => List.exists (fn (_, n, _, _, _) => IS.member (#exp s, n)) vis
adamc@271 151 | (DExport _, _) => true
adamc@273 152 | (DTable _, _) => true
adamc@338 153 | (DSequence _, _) => true
adamc@754 154 | (DView _, _) => true
adamc@569 155 | (DDatabase _, _) => true
adamc@718 156 | (DJavaScript _, _) => true
adamc@725 157 | (DCookie _, _) => true
adamc@1073 158 | (DStyle _, _) => true
adamc@1199 159 | (DTask _, _) => true
adam@1294 160 | (DPolicy _, _) => true
adam@1294 161 | (DOnError _, _) => true) file
adamc@134 162 end
adamc@134 163
adamc@134 164 end