JezK
Edit File: big-object-literal.js
// Copyright 2009 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Test that we can make large object literals that work. // Also test that we can attempt to make even larger object literals without // crashing. function testLiteral(size, array_in_middle) { print(size); var f; // Build object-literal string. var literal = "function f() { return "; for (var i = 0; i < size; i++) { literal += "{a:"; } literal += array_in_middle ? " [42.2]" : "{a:42.2}"; for (var i = 0; i < size; i++) { literal += "}"; if (i < size - 1) { literal += ", b:42, c:/asd/, x:'foo', y:[], z:new Object()"; } } literal += "; }"; // Create the object literal. eval(literal); var x = f(); // Check that the properties have the expected values. for (var i = 0; i < size; i++) { x = x.a; } if (array_in_middle) { assertEquals(42.2, x[0]), "x array in middle"; x[0] = 41.2; } else { assertEquals(42.2, x.a, "x object in middle"); x.a = 41.2; } var y = f(); for (var i = 0; i < size; i++) { y = y.a; } if (array_in_middle) { assertEquals(42.2, y[0], "y array in middle"); y[0] = 41.2; } else { assertEquals(42.2, y.a, "y object in middle"); y.a = 41.2; } } // The sizes to test. var sizes = [1, 2, 100, 200]; // Run the test. for (var i = 0; i < sizes.length; i++) { testLiteral(sizes[i], false); testLiteral(sizes[i], true); } function testLiteralAndCatch(size) { var big_enough = false; try { testLiteral(size, false); } catch (e) { big_enough = true; } try { testLiteral(size, true); } catch (e) { big_enough = true; } return big_enough; } // Catch stack overflows. testLiteralAndCatch(1000) || testLiteralAndCatch(20000) || testLiteralAndCatch(200000);