Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/runtime/ia64/IA64CurrentFrameGuess.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 /* | |
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.runtime.ia64; | |
26 | |
27 import sun.jvm.hotspot.debugger.*; | |
28 import sun.jvm.hotspot.debugger.ia64.*; | |
29 import sun.jvm.hotspot.code.*; | |
30 import sun.jvm.hotspot.interpreter.*; | |
31 import sun.jvm.hotspot.runtime.*; | |
32 | |
33 /** <P> Should be able to be used on all ia64 platforms we support | |
34 (Win32, Linux) to implement JavaThread's | |
35 "currentFrameGuess()" functionality. Input is an IA64ThreadContext; | |
36 output is SP, FP, and PC for an IA64Frame. Instantiation of the | |
37 IA64Frame is left to the caller, since we may need to subclass | |
38 IA64Frame to support signal handler frames on Unix platforms. </P> | |
39 | |
40 <P> This is pretty much impossible on ia64. | |
41 </P> */ | |
42 | |
43 public class IA64CurrentFrameGuess { | |
44 private IA64ThreadContext context; | |
45 private JavaThread thread; | |
46 private Address spFound; | |
47 private Address fpFound; | |
48 private Address pcFound; | |
49 | |
50 private static final boolean DEBUG = false; | |
51 | |
52 public IA64CurrentFrameGuess(IA64ThreadContext context, | |
53 JavaThread thread) { | |
54 this.context = context; | |
55 this.thread = thread; | |
56 } | |
57 | |
58 /** Returns false if not able to find a frame within a reasonable range. */ | |
59 public boolean run(long regionInBytesToSearch) { | |
60 /* | |
61 Without using the stack walking library this is not possible on ia64. | |
62 There is also the issue of walking dynamic code where there is no | |
63 stack walking info generated. | |
64 */ | |
65 return false; | |
66 } | |
67 | |
68 public Address getSP() { return null; } | |
69 public Address getFP() { return null; } | |
70 /** May be null if getting values from thread-local storage; take | |
71 care to call the correct IA64Frame constructor to recover this if | |
72 necessary */ | |
73 public Address getPC() { return null; } | |
74 | |
75 private void setValues(Address sp, Address fp, Address pc) { | |
76 spFound = sp; | |
77 fpFound = fp; | |
78 pcFound = pc; | |
79 } | |
80 } |