Mercurial > hg > truffle
annotate src/share/vm/oops/instanceOop.hpp @ 14694:58cf34613a72
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Reviewed-by: kvn, coleenp
Contributed-by: axel.siebenborn@sap.com, martin.doerr@sap.com
author | goetz |
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date | Mon, 10 Mar 2014 12:58:02 +0100 |
parents | de6a9e811145 |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
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 | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP |
26 #define SHARE_VM_OOPS_INSTANCEOOP_HPP | |
27 | |
28 #include "oops/oop.hpp" | |
29 | |
0 | 30 // An instanceOop is an instance of a Java Class |
31 // Evaluating "new HashTable()" will create an instanceOop. | |
32 | |
33 class instanceOopDesc : public oopDesc { | |
34 public: | |
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35 // aligned header size. |
0 | 36 static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; } |
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37 |
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38 // If compressed, the offset of the fields of the instance may not be aligned. |
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39 static int base_offset_in_bytes() { |
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40 // offset computation code breaks if UseCompressedClassPointers |
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41 // only is true |
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42 return (UseCompressedOops && UseCompressedClassPointers) ? |
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43 klass_gap_offset_in_bytes() : |
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44 sizeof(instanceOopDesc); |
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45 } |
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46 |
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47 static bool contains_field_offset(int offset, int nonstatic_field_size) { |
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48 int base_in_bytes = base_offset_in_bytes(); |
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49 return (offset >= base_in_bytes && |
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50 (offset-base_in_bytes) < nonstatic_field_size * heapOopSize); |
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51 } |
0 | 52 }; |
1972 | 53 |
54 #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP |