Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/oops/CompressedLineNumberReadStream.java @ 8764:8552f0992748
8008796: SA: Oop.iterateFields() should support CompressedKlassPointers again
Summary: add a missing change from JDK-7054512 so that Oop.iterateFields() works with UseCompressedKlassPointers
Reviewed-by: coleenp, roland
Contributed-by: yunda.mly@taobao.com
| author | kmo |
|---|---|
| date | Fri, 15 Mar 2013 22:07:42 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2001, 2005, 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.oops; | |
| 26 | |
| 27 import sun.jvm.hotspot.code.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 | |
| 30 public class CompressedLineNumberReadStream extends CompressedReadStream { | |
| 31 /** Equivalent to CompressedLineNumberReadStream(buffer, 0) */ | |
| 32 public CompressedLineNumberReadStream(Address buffer) { | |
| 33 this(buffer, 0); | |
| 34 } | |
| 35 | |
| 36 public CompressedLineNumberReadStream(Address buffer, int position) { | |
| 37 super(buffer, position); | |
| 38 } | |
| 39 | |
| 40 /** Read (bci, line number) pair from stream. Returns false at end-of-stream. */ | |
| 41 public boolean readPair() { | |
| 42 int next = readByte() & 0xFF; | |
| 43 // Check for terminator | |
| 44 if (next == 0) return false; | |
| 45 if (next == 0xFF) { | |
| 46 // Escape character, regular compression used | |
| 47 bci += readSignedInt(); | |
| 48 line += readSignedInt(); | |
| 49 } else { | |
| 50 // Single byte compression used | |
| 51 bci += next >> 3; | |
| 52 line += next & 0x7; | |
| 53 } | |
| 54 return true; | |
| 55 } | |
| 56 | |
| 57 public int bci() { return bci; } | |
| 58 public int line() { return line; } | |
| 59 | |
| 60 //-------------------------------------------------------------------------------- | |
| 61 // Internals only below this point | |
| 62 // | |
| 63 | |
| 64 private int bci; | |
| 65 private int line; | |
| 66 } |