|
0
|
1 /*
|
|
|
2 * Copyright 2002-2005 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 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
|
|
|
79 // These are only used by friends
|
|
|
80 private:
|
|
|
81
|
|
|
82 intptr_t* last_Java_sp() const {
|
|
|
83 // _last_Java_sp will always be a an unbiased stack pointer
|
|
|
84 // if is is biased then some setter screwed up. This is
|
|
|
85 // deadly.
|
|
|
86 #ifdef _LP64
|
|
|
87 assert(((intptr_t)_last_Java_sp & 0xF) == 0, "Biased last_Java_sp");
|
|
|
88 #endif
|
|
|
89 return _last_Java_sp;
|
|
|
90 }
|
|
|
91
|
|
|
92 void capture_last_Java_pc(intptr_t* sp);
|
|
|
93
|
|
|
94 void set_window_flushed( void) {
|
|
|
95 _flags |= flushed;
|
|
|
96 OrderAccess::fence();
|
|
|
97 }
|
