Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/debugger/posix/AddressDataSource.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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-1:000000000000 | 0:a61af66fc99e |
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1 /* | |
2 * Copyright 2001-2004 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 package sun.jvm.hotspot.debugger.posix; | |
25 | |
26 import java.io.*; | |
27 import sun.jvm.hotspot.debugger.*; | |
28 import sun.jvm.hotspot.debugger.posix.elf.*; | |
29 | |
30 class AddressDataSource implements DataSource { | |
31 AddressDataSource(Address addr) { | |
32 this.addr = addr; | |
33 offset = 0; | |
34 } | |
35 | |
36 public byte readByte() throws IOException { | |
37 try { | |
38 byte res = (byte) addr.getCIntegerAt(offset, 1, false); | |
39 ++offset; | |
40 return res; | |
41 } catch (UnmappedAddressException e) { | |
42 throw (IOException) new IOException("Unmapped address at 0x" | |
43 + Long.toHexString(e.getAddress())).initCause(e); | |
44 } catch (DebuggerException e) { | |
45 throw (IOException) new IOException().initCause(e); | |
46 } | |
47 } | |
48 | |
49 public short readShort() throws IOException { | |
50 // NOTE: byte swapping is taken care of at the ELFFileImpl level | |
51 int b1 = readByte() & 0xFF; | |
52 int b2 = readByte() & 0xFF; | |
53 return (short) ((b1 << 8) | b2); | |
54 } | |
55 | |
56 public int readInt() throws IOException { | |
57 // NOTE: byte swapping is taken care of at the ELFFileImpl level | |
58 int b1 = ((int) readByte()) & 0xFF; | |
59 int b2 = ((int) readByte()) & 0xFF; | |
60 int b3 = ((int) readByte()) & 0xFF; | |
61 int b4 = ((int) readByte()) & 0xFF; | |
62 return ((b1 << 24) | (b2 << 16) | (b3 << 8) | b4); | |
63 } | |
64 | |
65 public long readLong() throws IOException { | |
66 // NOTE: byte swapping is taken care of at the ELFFileImpl level | |
67 long b1 = ((long) readByte()) & 0xFFL; | |
68 long b2 = ((long) readByte()) & 0xFFL; | |
69 long b3 = ((long) readByte()) & 0xFFL; | |
70 long b4 = ((long) readByte()) & 0xFFL; | |
71 long b5 = ((long) readByte()) & 0xFFL; | |
72 long b6 = ((long) readByte()) & 0xFFL; | |
73 long b7 = ((long) readByte()) & 0xFFL; | |
74 long b8 = ((long) readByte()) & 0xFFL; | |
75 return (((((b1 << 24) | (b2 << 16) | (b3 << 8) | b4)) << 32) | | |
76 ((((b5 << 24) | (b6 << 16) | (b7 << 8) | b8)))); | |
77 } | |
78 | |
79 public int read(byte[] b) throws IOException { | |
80 for (int i = 0; i < b.length; i++) { | |
81 b[i] = readByte(); | |
82 } | |
83 return b.length; | |
84 } | |
85 | |
86 public void seek(long pos) throws IOException { | |
87 offset = pos; | |
88 } | |
89 | |
90 public long getFilePointer() throws IOException { | |
91 return offset; | |
92 } | |
93 | |
94 public void close() throws IOException { | |
95 } | |
96 | |
97 private Address addr; | |
98 private long offset; | |
99 } |