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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/linux/x86/LinuxX86CFrame.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2003 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
25 package sun.jvm.hotspot.debugger.linux.x86;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.debugger.linux.*;
29 import sun.jvm.hotspot.debugger.cdbg.*;
30 import sun.jvm.hotspot.debugger.cdbg.basic.*;
31
32 final public class LinuxX86CFrame extends BasicCFrame {
33 // package/class internals only
34 public LinuxX86CFrame(LinuxDebugger dbg, Address ebp, Address pc) {
35 super(dbg.getCDebugger());
36 this.ebp = ebp;
37 this.pc = pc;
38 this.dbg = dbg;
39 }
40
41 // override base class impl to avoid ELF parsing
42 public ClosestSymbol closestSymbolToPC() {
43 // try native lookup in debugger.
44 return dbg.lookup(dbg.getAddressValue(pc()));
45 }
46
47 public Address pc() {
48 return pc;
49 }
50
51 public Address localVariableBase() {
52 return ebp;
53 }
54
55 public CFrame sender() {
56 if (ebp == null) {
57 return null;
58 }
59
60 Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE);
61 if (nextEBP == null) {
62 return null;
63 }
64 Address nextPC = ebp.getAddressAt( 1 * ADDRESS_SIZE);
65 if (nextPC == null) {
66 return null;
67 }
68 return new LinuxX86CFrame(dbg, nextEBP, nextPC);
69 }
70
71 private static final int ADDRESS_SIZE = 4;
72 private Address pc;
73 private Address ebp;
74 private LinuxDebugger dbg;
75 }