1// Copyright 2013 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: --use-osr --allow-natives-syntax --crankshaft 29 30var o1 = {a : 10}; 31var o2 = { }; 32o2.__proto__ = o1; 33var o3 = { }; 34o3.__proto__ = o2; 35 36function f(n, x, b) { 37 var sum = x.a; 38 for (var i = 0; i < n; i++) { 39 sum = 1.0 / i; 40 } 41 return sum; 42} 43 44f(10, o3); 45f(20, o3); 46f(30, o3); 47%OptimizeFunctionOnNextCall(f, "concurrent"); 48f(100000, o3); 49// At this point OSR replaces already optimized code. 50// Check that it evicts old code from cache. 51 52// This causes all code for f to be lazily deopted. 53o2.a = 5; 54 55// If OSR did not evict the old code, it will be installed in f here. 56%OptimizeFunctionOnNextCall(f); 57f(10, o3); 58 59// The old code is already deoptimized, but f still points to it. 60// Disassembling it will crash. 61%DisassembleFunction(f); 62