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comparison agent/src/share/classes/sun/jvm/hotspot/debugger/windows/x86/WindowsX86CFrame.java @ 10302:78332b46e604

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6313816: SA: jstack -m fails on Win32 : UnalignedAddressException Reviewed-by: sla, poonam
author kevinw
date Thu, 16 May 2013 12:40:27 +0100
parents agent/src/share/classes/sun/jvm/hotspot/debugger/cdbg/basic/x86/X86CFrame.java@b87e5a681416
children de6a9e811145
comparison
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10301:17db82f22f1e 10302:78332b46e604
1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 package sun.jvm.hotspot.debugger.windows.x86;
26
27 import sun.jvm.hotspot.debugger.*;
28 import sun.jvm.hotspot.debugger.x86.*;
29 import sun.jvm.hotspot.debugger.cdbg.*;
30 import sun.jvm.hotspot.debugger.cdbg.basic.*;
31 import sun.jvm.hotspot.debugger.windbg.*;
32
33 public class WindowsX86CFrame extends BasicCFrame {
34 private Address ebp;
35 private Address pc;
36
37 private static final int ADDRESS_SIZE = 4;
38
39 /** Constructor for topmost frame */
40 public WindowsX86CFrame(WindbgDebugger dbg, Address ebp, Address pc) {
41 super(dbg.getCDebugger());
42 this.ebp = ebp;
43 this.pc = pc;
44 this.dbg = dbg;
45 }
46
47 public CFrame sender(ThreadProxy thread) {
48 X86ThreadContext context = (X86ThreadContext) thread.getContext();
49 Address esp = context.getRegisterAsAddress(X86ThreadContext.ESP);
50
51 if ( (ebp == null) || ebp.lessThan(esp) ) {
52 return null;
53 }
54
55 // Check alignment of ebp
56 if ( dbg.getAddressValue(ebp) % ADDRESS_SIZE != 0) {
57 return null;
58 }
59
60 Address nextEBP = ebp.getAddressAt( 0 * ADDRESS_SIZE);
61 if (nextEBP == null || nextEBP.lessThanOrEqual(ebp)) {
62 return null;
63 }
64 Address nextPC = ebp.getAddressAt( 1 * ADDRESS_SIZE);
65 if (nextPC == null) {
66 return null;
67 }
68 return new WindowsX86CFrame(dbg, nextEBP, nextPC);
69 }
70
71 public Address pc() {
72 return pc;
73 }
74
75 public Address localVariableBase() {
76 return ebp;
77 }
78
79 private WindbgDebugger dbg;
80 }