66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
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// Copyright 2013 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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function s(v) {
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v.x = 1;
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}
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function c(p) {
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return {__proto__: p};
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}
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var p = {};
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// Make p the last prototype in the chain.
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p.__proto__ = null;
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var o1 = c(p);
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var o2 = c(p);
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var o3 = c(p);
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var o4 = c(p);
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// Make y go to slow mode.
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// Do this after using p as prototype, since using an object as prototype kicks
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// it back into fast mode.
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p.y = 1;
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delete p.y;
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// Initialize the store IC.
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s(o1);
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s(o2);
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// Do something with x in slow-mode p.
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Object.defineProperty(p, "x", { writable: false, value: 5 });
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// Verify that directly setting x fails.
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o3.x = 10;
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assertEquals(5, o3.x);
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// Verify that setting x through the IC fails.
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s(o4);
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assertEquals(5, o4.x);
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