Mercurial > hg > truffle
annotate src/cpu/x86/vm/javaFrameAnchor_x86.hpp @ 4409:9f8e4aeec1a9
Merge
author | Andreas Woess <andreas.woess@jku.at> |
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date | Sun, 29 Jan 2012 11:40:04 +0100 |
parents | f95d63e2154a |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2002, 2010, 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 | |
1972 | 25 #ifndef CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP |
26 #define CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP | |
27 | |
0 | 28 private: |
29 | |
30 // FP value associated with _last_Java_sp: | |
31 intptr_t* volatile _last_Java_fp; // pointer is volatile not what it points to | |
32 | |
33 public: | |
34 // Each arch must define reset, save, restore | |
35 // These are used by objects that only care about: | |
36 // 1 - initializing a new state (thread creation, javaCalls) | |
37 // 2 - saving a current state (javaCalls) | |
38 // 3 - restoring an old state (javaCalls) | |
39 | |
40 void clear(void) { | |
41 // clearing _last_Java_sp must be first | |
42 _last_Java_sp = NULL; | |
43 // fence? | |
44 _last_Java_fp = NULL; | |
45 _last_Java_pc = NULL; | |
46 } | |
47 | |
48 void copy(JavaFrameAnchor* src) { | |
49 // In order to make sure the transition state is valid for "this" | |
50 // We must clear _last_Java_sp before copying the rest of the new data | |
51 // | |
52 // Hack Alert: Temporary bugfix for 4717480/4721647 | |
53 // To act like previous version (pd_cache_state) don't NULL _last_Java_sp | |
54 // unless the value is changing | |
55 // | |
56 if (_last_Java_sp != src->_last_Java_sp) | |
57 _last_Java_sp = NULL; | |
58 | |
59 _last_Java_fp = src->_last_Java_fp; | |
60 _last_Java_pc = src->_last_Java_pc; | |
61 // Must be last so profiler will always see valid frame if has_last_frame() is true | |
62 _last_Java_sp = src->_last_Java_sp; | |
63 } | |
64 | |
65 // Always walkable | |
66 bool walkable(void) { return true; } | |
67 // Never any thing to do since we are always walkable and can find address of return addresses | |
68 void make_walkable(JavaThread* thread) { } | |
69 | |
70 intptr_t* last_Java_sp(void) const { return _last_Java_sp; } | |
71 | |
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72 address last_Java_pc(void) { return _last_Java_pc; } |
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73 |
0 | 74 private: |
75 | |
76 static ByteSize last_Java_fp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_fp); } | |
77 | |
78 public: | |
79 | |
80 void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; } | |
81 | |
82 intptr_t* last_Java_fp(void) { return _last_Java_fp; } | |
83 // Assert (last_Java_sp == NULL || fp == NULL) | |
84 void set_last_Java_fp(intptr_t* fp) { _last_Java_fp = fp; } | |
1972 | 85 |
86 #endif // CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP |