Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/compiler/OopMapStream.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2000, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.compiler; | |
| 26 | |
| 27 import sun.jvm.hotspot.code.*; | |
| 28 | |
| 29 public class OopMapStream { | |
| 30 private CompressedReadStream stream; | |
| 31 private OopMap oopMap; | |
| 32 private int mask; | |
| 33 private int size; | |
| 34 private int position; | |
| 35 private OopMapValue omv; | |
| 36 private boolean omvValid; | |
| 37 | |
| 38 public OopMapStream(OopMap oopMap) { | |
| 39 this(oopMap, (OopMapValue.OopTypes[]) null); | |
| 40 } | |
| 41 | |
| 42 public OopMapStream(OopMap oopMap, OopMapValue.OopTypes type) { | |
| 43 this(oopMap, (OopMapValue.OopTypes[]) null); | |
| 44 mask = type.getValue(); | |
| 45 } | |
| 46 | |
| 47 public OopMapStream(OopMap oopMap, OopMapValue.OopTypes[] types) { | |
| 48 if (oopMap.getOMVData() == null) { | |
| 49 stream = new CompressedReadStream(oopMap.getWriteStream().getBuffer()); | |
| 50 } else { | |
| 51 stream = new CompressedReadStream(oopMap.getOMVData()); | |
| 52 } | |
| 53 mask = computeMask(types); | |
| 54 size = (int) oopMap.getOMVCount(); | |
| 55 position = 0; | |
| 56 omv = new OopMapValue(); | |
| 57 omvValid = false; | |
| 58 } | |
| 59 | |
| 60 public boolean isDone() { | |
| 61 if (!omvValid) { | |
| 62 findNext(); | |
| 63 } | |
| 64 return !omvValid; | |
| 65 } | |
| 66 | |
| 67 public void next() { | |
| 68 findNext(); | |
| 69 } | |
| 70 | |
| 71 public OopMapValue getCurrent() { | |
| 72 return omv; | |
| 73 } | |
| 74 | |
| 75 //-------------------------------------------------------------------------------- | |
| 76 // Internals only below this point | |
| 77 // | |
| 78 | |
| 79 private int computeMask(OopMapValue.OopTypes[] types) { | |
| 80 mask = 0; | |
| 81 if (types != null) { | |
| 82 for (int i = 0; i < types.length; i++) { | |
| 83 mask |= types[i].getValue(); | |
| 84 } | |
| 85 } | |
| 86 return mask; | |
| 87 } | |
| 88 | |
| 89 private void findNext() { | |
| 90 while (position++ < size) { | |
| 91 omv.readFrom(stream); | |
| 92 if ((omv.getType().getValue() & mask) > 0) { | |
| 93 omvValid = true; | |
| 94 return; | |
| 95 } | |
| 96 } | |
| 97 omvValid = false; | |
| 98 } | |
| 99 } |