Mercurial > hg > truffle
comparison src/share/vm/oops/metadata.hpp @ 17709:f9e35a9dc8c7
8033792: AltHashing used jint for imprecise bit shifting
Summary: AltHashing used jint the way of juint in bit shifting which could lead loss of precision. Fix by change _seed defined as juint.
Reviewed-by: coleenp, ccheung
Contributed-by: yumin.qi@oracle.com
author | minqi |
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date | Mon, 10 Feb 2014 21:29:14 -0800 |
parents | da91efe96a93 |
children | 7380034e5b31 4ca6dc0799b6 |
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17707:7d28f4e15b61 | 17709:f9e35a9dc8c7 |
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1 /* | 1 /* |
2 * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved. | 2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved. |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | 4 * |
5 * This code is free software; you can redistribute it and/or modify it | 5 * This code is free software; you can redistribute it and/or modify it |
6 * under the terms of the GNU General Public License version 2 only, as | 6 * under the terms of the GNU General Public License version 2 only, as |
7 * published by the Free Software Foundation. | 7 * published by the Free Software Foundation. |
38 NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; }) | 38 NOT_PRODUCT(bool is_valid() const volatile { return _valid == 0; }) |
39 | 39 |
40 int identity_hash() { return (int)(uintptr_t)this; } | 40 int identity_hash() { return (int)(uintptr_t)this; } |
41 | 41 |
42 // Rehashing support for tables containing pointers to this | 42 // Rehashing support for tables containing pointers to this |
43 unsigned int new_hash(jint seed) { ShouldNotReachHere(); return 0; } | 43 unsigned int new_hash(juint seed) { ShouldNotReachHere(); return 0; } |
44 | 44 |
45 virtual bool is_klass() const volatile { return false; } | 45 virtual bool is_klass() const volatile { return false; } |
46 virtual bool is_method() const volatile { return false; } | 46 virtual bool is_method() const volatile { return false; } |
47 virtual bool is_methodData() const volatile { return false; } | 47 virtual bool is_methodData() const volatile { return false; } |
48 virtual bool is_constantPool() const volatile { return false; } | 48 virtual bool is_constantPool() const volatile { return false; } |