1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
/*
* Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package sun.jvm.hotspot.debugger.linux.amd64;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.debugger.amd64.*;
import sun.jvm.hotspot.debugger.linux.*;
import sun.jvm.hotspot.debugger.cdbg.*;
import sun.jvm.hotspot.debugger.cdbg.basic.*;
final public class LinuxAMD64CFrame extends BasicCFrame {
public LinuxAMD64CFrame(LinuxDebugger dbg, Address rbp, Address rip) {
super(dbg.getCDebugger());
this.rbp = rbp;
this.rip = rip;
this.dbg = dbg;
}
// override base class impl to avoid ELF parsing
public ClosestSymbol closestSymbolToPC() {
// try native lookup in debugger.
return dbg.lookup(dbg.getAddressValue(pc()));
}
public Address pc() {
return rip;
}
public Address localVariableBase() {
return rbp;
}
public CFrame sender(ThreadProxy thread) {
AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
Address rsp = context.getRegisterAsAddress(AMD64ThreadContext.RSP);
if ( (rbp == null) || rbp.lessThan(rsp) ) {
return null;
}
// Check alignment of rbp
if ( dbg.getAddressValue(rbp) % ADDRESS_SIZE != 0) {
return null;
}
Address nextRBP = rbp.getAddressAt( 0 * ADDRESS_SIZE);
if (nextRBP == null || nextRBP.lessThanOrEqual(rbp)) {
return null;
}
Address nextPC = rbp.getAddressAt( 1 * ADDRESS_SIZE);
if (nextPC == null) {
return null;
}
return new LinuxAMD64CFrame(dbg, nextRBP, nextPC);
}
// package/class internals only
private static final int ADDRESS_SIZE = 8;
private Address rip;
private Address rbp;
private LinuxDebugger dbg;
}
|
