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17a74ddd3d
PR-URL: https://github.com/nodejs/node/pull/49639 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
79 lines
3.0 KiB
JavaScript
79 lines
3.0 KiB
JavaScript
// Copyright 2010 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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// Flags: --expose-externalize-string --expose-gc --allow-natives-syntax
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var size = 1024;
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function dont_inline() { return "A"; }
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%NeverOptimizeFunction(dont_inline);
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function dont_inline2() { return "\u1234"; }
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%NeverOptimizeFunction(dont_inline2);
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function test() {
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var str = "";
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// Build an ascii cons string.
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for (var i = 0; i < size; i++) {
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str += String.fromCharCode(i & 0x7f);
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}
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assertTrue(isOneByteString(str));
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var realTwoByteExternalString =
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createExternalizableString('\u1234\u1234\u1234\u1234' + dont_inline2());
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externalizeString(realTwoByteExternalString);
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assertFalse(isOneByteString(realTwoByteExternalString));
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assertFalse(isOneByteString(["a", realTwoByteExternalString].join("")));
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// Appending a real two-byte string should produce a two-byte cons.
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var str2 = str + realTwoByteExternalString;
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assertFalse(isOneByteString(str2));
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// Force flattening of the string.
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old_length = str2.length - realTwoByteExternalString.length;
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for (var i = 0; i < old_length; i++) {
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assertEquals(String.fromCharCode(i & 0x7f), str2[i]);
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}
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for (var i = old_length; i < str.length; i++) {
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assertEquals("\u1234", str2[i]);
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}
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// Flattened string should still be two-byte.
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assertFalse(isOneByteString(str2));
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}
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// Run the test many times to ensure IC-s don't break things.
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for (var i = 0; i < 10; i++) {
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test();
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}
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// Clean up string to make Valgrind happy.
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gc();
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gc();
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