Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | "use strict"; |
| 29 | |
| 30 | // We want to test the context chain shape. In each of the tests cases |
| 31 | // below, the outer with is to force a runtime lookup of the identifier 'x' |
| 32 | // to actually verify that the inner context has been discarded. A static |
| 33 | // lookup of 'x' might accidentally succeed. |
| 34 | |
| 35 | { |
| 36 | let x = 2; |
| 37 | L: { |
| 38 | let x = 3; |
| 39 | assertEquals(3, x); |
| 40 | break L; |
| 41 | assertTrue(false); |
| 42 | } |
| 43 | assertEquals(2, x); |
| 44 | } |
| 45 | |
| 46 | do { |
| 47 | let x = 4; |
| 48 | assertEquals(4,x); |
| 49 | { |
| 50 | let x = 5; |
| 51 | assertEquals(5, x); |
| 52 | continue; |
| 53 | assertTrue(false); |
| 54 | } |
| 55 | } while (false); |
| 56 | |
| 57 | var caught = false; |
| 58 | try { |
| 59 | { |
| 60 | let xx = 18; |
| 61 | throw 25; |
| 62 | assertTrue(false); |
| 63 | } |
| 64 | } catch (e) { |
| 65 | caught = true; |
| 66 | assertEquals(25, e); |
| 67 | (function () { |
| 68 | try { |
| 69 | // NOTE: This checks that the block scope containing xx has been |
| 70 | // removed from the context chain. |
| 71 | eval('xx'); |
| 72 | assertTrue(false); // should not reach here |
| 73 | } catch (e2) { |
| 74 | assertTrue(e2 instanceof ReferenceError); |
| 75 | } |
| 76 | })(); |
| 77 | } |
| 78 | assertTrue(caught); |
| 79 | |
| 80 | |
| 81 | (function(x) { |
| 82 | label: { |
| 83 | let x = 'inner'; |
| 84 | break label; |
| 85 | } |
| 86 | assertEquals('outer', eval('x')); |
| 87 | })('outer'); |
| 88 | |
| 89 | |
| 90 | (function(x) { |
| 91 | label: { |
| 92 | let x = 'middle'; |
| 93 | { |
| 94 | let x = 'inner'; |
| 95 | break label; |
| 96 | } |
| 97 | } |
| 98 | assertEquals('outer', eval('x')); |
| 99 | })('outer'); |
| 100 | |
| 101 | |
| 102 | (function(x) { |
| 103 | for (var i = 0; i < 10; ++i) { |
| 104 | let x = 'inner' + i; |
| 105 | continue; |
| 106 | } |
| 107 | assertEquals('outer', eval('x')); |
| 108 | })('outer'); |
| 109 | |
| 110 | |
| 111 | (function(x) { |
| 112 | label: for (var i = 0; i < 10; ++i) { |
| 113 | let x = 'middle' + i; |
| 114 | for (var j = 0; j < 10; ++j) { |
| 115 | let x = 'inner' + j; |
| 116 | continue label; |
| 117 | } |
| 118 | } |
| 119 | assertEquals('outer', eval('x')); |
| 120 | })('outer'); |
| 121 | |
| 122 | |
| 123 | (function(x) { |
| 124 | try { |
| 125 | let x = 'inner'; |
| 126 | throw 0; |
| 127 | } catch (e) { |
| 128 | assertEquals('outer', eval('x')); |
| 129 | } |
| 130 | })('outer'); |
| 131 | |
| 132 | |
| 133 | (function(x) { |
| 134 | try { |
| 135 | let x = 'middle'; |
| 136 | { |
| 137 | let x = 'inner'; |
| 138 | throw 0; |
| 139 | } |
| 140 | } catch (e) { |
| 141 | assertEquals('outer', eval('x')); |
| 142 | } |
| 143 | })('outer'); |
| 144 | |
| 145 | |
| 146 | try { |
| 147 | (function(x) { |
| 148 | try { |
| 149 | let x = 'inner'; |
| 150 | throw 0; |
| 151 | } finally { |
| 152 | assertEquals('outer', eval('x')); |
| 153 | } |
| 154 | })('outer'); |
| 155 | } catch (e) { |
| 156 | if (e instanceof MjsUnitAssertionError) throw e; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | try { |
| 161 | (function(x) { |
| 162 | try { |
| 163 | let x = 'middle'; |
| 164 | { |
| 165 | let x = 'inner'; |
| 166 | throw 0; |
| 167 | } |
| 168 | } finally { |
| 169 | assertEquals('outer', eval('x')); |
| 170 | } |
| 171 | })('outer'); |
| 172 | } catch (e) { |
| 173 | if (e instanceof MjsUnitAssertionError) throw e; |
| 174 | } |
| 175 | |
| 176 | |
| 177 | // Verify that the context is correctly set in the stack frame after exiting |
| 178 | // from eval. |
| 179 | function f() {} |
| 180 | |
| 181 | (function(x) { |
| 182 | label: { |
| 183 | let x = 'inner'; |
| 184 | break label; |
| 185 | } |
| 186 | f(); // The context could be restored from the stack after the call. |
| 187 | assertEquals('outer', eval('x')); |
| 188 | })('outer'); |
| 189 | |
| 190 | |
| 191 | (function(x) { |
| 192 | for (var i = 0; i < 10; ++i) { |
| 193 | let x = 'inner'; |
| 194 | continue; |
| 195 | } |
| 196 | f(); |
| 197 | assertEquals('outer', eval('x')); |
| 198 | })('outer'); |
| 199 | |
| 200 | |
| 201 | (function(x) { |
| 202 | try { |
| 203 | let x = 'inner'; |
| 204 | throw 0; |
| 205 | } catch (e) { |
| 206 | f(); |
| 207 | assertEquals('outer', eval('x')); |
| 208 | } |
| 209 | })('outer'); |
| 210 | |
| 211 | |
| 212 | try { |
| 213 | (function(x) { |
| 214 | try { |
| 215 | let x = 'inner'; |
| 216 | throw 0; |
| 217 | } finally { |
| 218 | f(); |
| 219 | assertEquals('outer', eval('x')); |
| 220 | } |
| 221 | })('outer'); |
| 222 | } catch (e) { |
| 223 | if (e instanceof MjsUnitAssertionError) throw e; |
| 224 | } |