Mercurial > hg > truffle
annotate src/cpu/sparc/vm/javaFrameAnchor_sparc.hpp @ 1882:ee0d26abaad3
Merge
author | kamg |
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date | Tue, 26 Oct 2010 16:48:28 -0700 |
parents | 126ea7725993 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2002, 2005, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 private: | |
26 volatile int _flags; | |
27 | |
28 public: | |
29 | |
30 enum pd_Constants { | |
31 flushed = 1 // winodows have flushed | |
32 }; | |
33 | |
34 int flags(void) { return _flags; } | |
35 void set_flags(int flags) { _flags = flags; } | |
36 | |
37 static ByteSize flags_offset() { return byte_offset_of(JavaFrameAnchor, _flags); } | |
38 | |
39 // Each arch must define clear, copy | |
40 // These are used by objects that only care about: | |
41 // 1 - initializing a new state (thread creation, javaCalls) | |
42 // 2 - saving a current state (javaCalls) | |
43 // 3 - restoring an old state (javaCalls) | |
44 | |
45 void clear(void) { | |
46 // clearing _last_Java_sp must be first | |
47 _last_Java_sp = NULL; | |
48 // fence? | |
49 _flags = 0; | |
50 _last_Java_pc = NULL; | |
51 } | |
52 | |
53 void copy(JavaFrameAnchor* src) { | |
54 // In order to make sure the transition state is valid for "this" | |
55 // We must clear _last_Java_sp before copying the rest of the new data | |
56 // | |
57 // Hack Alert: Temporary bugfix for 4717480/4721647 | |
58 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp | |
59 // unless the value is changing | |
60 // | |
61 if (_last_Java_sp != src->_last_Java_sp) | |
62 _last_Java_sp = NULL; | |
63 | |
64 _flags = src->_flags; | |
65 _last_Java_pc = src->_last_Java_pc; | |
66 // Must be last so profiler will always see valid frame if has_last_frame() is true | |
67 _last_Java_sp = src->_last_Java_sp; | |
68 } | |
69 | |
70 // Is stack walkable | |
71 inline bool walkable( void) { | |
72 return _flags & flushed; | |
73 } | |
74 | |
75 void make_walkable(JavaThread* thread); | |
76 | |
77 void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } | |
78 | |
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79 address last_Java_pc(void) { return _last_Java_pc; } |
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80 |
0 | 81 // These are only used by friends |
82 private: | |
83 | |
84 intptr_t* last_Java_sp() const { | |
85 // _last_Java_sp will always be a an unbiased stack pointer | |
86 // if is is biased then some setter screwed up. This is | |
87 // deadly. | |
88 #ifdef _LP64 | |
89 assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp"); | |
90 #endif | |
91 return _last_Java_sp; | |
92 } | |
93 | |
94 void capture_last_Java_pc(intptr_t* sp); | |
95 | |
96 void set_window_flushed( void) { | |
97 _flags |= flushed; | |
98 OrderAccess::fence(); | |
99 } |