1 /*
2 * Copyright (c) 2002, 2007, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 private:
26
27 // FP value associated with _last_Java_sp:
28 intptr_t* volatile _last_Java_fp; // pointer is volatile not what it points to
29
30 public:
31 // Each arch must define reset, save, restore
32 // These are used by objects that only care about:
33 // 1 - initializing a new state (thread creation, javaCalls)
34 // 2 - saving a current state (javaCalls)
35 // 3 - restoring an old state (javaCalls)
36
37 void clear(void) {
38 // clearing _last_Java_sp must be first
39 _last_Java_sp = NULL;
40 // fence?
41 _last_Java_fp = NULL;
42 _last_Java_pc = NULL;
43 }
44
62 // Always walkable
63 bool walkable(void) { return true; }
64 // Never any thing to do since we are always walkable and can find address of return addresses
65 void make_walkable(JavaThread* thread) { }
66
67 intptr_t* last_Java_sp(void) const { return _last_Java_sp; }
68
69 address last_Java_pc(void) { return _last_Java_pc; }
70
71 private:
72
73 static ByteSize last_Java_fp_offset() { return byte_offset_of(JavaFrameAnchor, _last_Java_fp); }
74
75 public:
76
77 void set_last_Java_sp(intptr_t* sp) { _last_Java_sp = sp; }
78
79 intptr_t* last_Java_fp(void) { return _last_Java_fp; }
80 // Assert (last_Java_sp == NULL || fp == NULL)
81 void set_last_Java_fp(intptr_t* fp) { _last_Java_fp = fp; }
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1 /*
2 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP
26 #define CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP
27
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
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
72 address last_Java_pc(void) { return _last_Java_pc; }
73
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; }
85
86 #endif // CPU_X86_VM_JAVAFRAMEANCHOR_X86_HPP
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