47 lines
2.2 KiB
JavaScript
47 lines
2.2 KiB
JavaScript
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// Copyright 2009 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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// A HeapNumber with certain bits in the mantissa of the floating point
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// value should not be able to masquerade as a string in a keyed lookup
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// inline cache stub. See http://codereview.chromium.org/155924.
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A = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ];
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function foo() {
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x = 1 << 26;
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x = x * x;
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// The following floating-point heap number has a second word similar
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// to that of the string "5":
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// 2^52 + index << cached_index_shift + cached_index_tag
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x = x + (5 << 2) + (1 << 1);
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return A[x];
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}
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assertEquals(undefined, foo(), "First lookup A[bad_float]");
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assertEquals(undefined, foo(), "Second lookup A[bad_float]");
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assertEquals(undefined, foo(), "Third lookup A[bad_float]");
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