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comparison src/cpu/zero/vm/javaFrameAnchor_zero.hpp @ 1010:354d3184f6b2

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6890308: integrate zero assembler hotspot changes Reviewed-by: never Contributed-by: gbenson@redhat.com
author never
date Tue, 13 Oct 2009 12:04:21 -0700
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children 0c5b3cf3c1f5
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1009:03b336640699 1010:354d3184f6b2
1 /*
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
3 * Copyright 2007, 2008 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 */
25
26 public:
27 // Each arch must define reset, save, restore
28 // These are used by objects that only care about:
29 // 1 - initializing a new state (thread creation, javaCalls)
30 // 2 - saving a current state (javaCalls)
31 // 3 - restoring an old state (javaCalls)
32
33 void clear() {
34 // clearing _last_Java_sp must be first
35 _last_Java_sp = NULL;
36 // fence?
37 _last_Java_pc = NULL;
38 }
39
40 void copy(JavaFrameAnchor* src) {
41 // In order to make sure the transition state is valid for "this"
42 // We must clear _last_Java_sp before copying the rest of the new
43 // data
44 //
45 // Hack Alert: Temporary bugfix for 4717480/4721647 To act like
46 // previous version (pd_cache_state) don't NULL _last_Java_sp
47 // unless the value is changing
48 //
49 if (_last_Java_sp != src->_last_Java_sp)
50 _last_Java_sp = NULL;
51
52 _last_Java_pc = src->_last_Java_pc;
53 // Must be last so profiler will always see valid frame if
54 // has_last_frame() is true
55 _last_Java_sp = src->_last_Java_sp;
56 }
57
58 bool walkable() {
59 return true;
60 }
61
62 void make_walkable(JavaThread* thread) {
63 // nothing to do
64 }
65
66 intptr_t* last_Java_sp() const {
67 return _last_Java_sp;
68 }
69
70 void set_last_Java_sp(intptr_t* sp) {
71 _last_Java_sp = sp;
72 }