1 // Copyright 2014 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 // Flags: --expose-debug-as debug --allow-natives-syntax 29 30 Debug = debug.Debug; 31 32 function dummy(x) { 33 return x + 100; 34 } 35 36 function create_closure() { 37 var f = function(arg) { 38 if (arg) { %DeoptimizeFunction(f); } 39 var a = Array(10); 40 for (var i = 0; i < a.length; i++) { 41 a[i] = i; 42 } 43 } 44 return f; 45 } 46 47 var c = create_closure(); 48 c(); 49 50 // c CallIC state now has custom Array handler installed. 51 52 // Turn on the debugger. 53 Debug.setListener(function () {}); 54 55 var d = create_closure(); 56 %OptimizeFunctionOnNextCall(d); 57 // Thanks to the debugger, we recreate the full code too. We deopt and run 58 // it, stomping on the unexpected AllocationSite in the type vector slot. 59 d(true); 60 61 // CallIC in c misinterprets type vector slot contents as an AllocationSite, 62 // corrupting the heap. 63 c(); 64 65 // CallIC MISS - crash due to corruption. 66 dummy(); 67
