Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/MappedByteBufferDataSource.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 /* |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
2 * Copyright (c) 2002, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.debugger; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.nio.*; | |
| 29 | |
| 30 /** Implementation of DataSource using MappedByteBuffer. This works | |
| 31 around a performance problem in JDK 1.4 where ByteBuffer's | |
| 32 operations always become virtual calls rather than being inlined. | |
| 33 Need to fix this soon. */ | |
| 34 | |
| 35 public class MappedByteBufferDataSource implements DataSource { | |
| 36 private MappedByteBuffer buf; | |
| 37 | |
| 38 public MappedByteBufferDataSource(MappedByteBuffer buf) { | |
| 39 this.buf = buf; | |
| 40 } | |
| 41 | |
| 42 public byte readByte() throws IOException { return buf.get(); } | |
| 43 public short readShort() throws IOException { return buf.getShort(); } | |
| 44 public int readInt() throws IOException { return buf.getInt(); } | |
| 45 public long readLong() throws IOException { return buf.getLong(); } | |
| 46 public int read(byte[] b) throws IOException { buf.get(b); return b.length; } | |
| 47 public void seek(long pos) throws IOException { | |
| 48 try { | |
| 49 buf.position((int) pos); | |
| 50 } catch (IllegalArgumentException e) { | |
| 51 System.err.println("Error seeking to file position 0x" + Long.toHexString(pos)); | |
| 52 throw(e); | |
| 53 } | |
| 54 } | |
| 55 public long getFilePointer() throws IOException { return buf.position(); } | |
| 56 public void close() throws IOException { buf = null; } | |
| 57 } |