|
1 /* |
|
2 * Copyright 1997-2005 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 // PcDescs map a physical PC (given as offset from start of nmethod) to |
|
26 // the corresponding source scope and byte code index. |
|
27 |
|
28 class nmethod; |
|
29 |
|
30 class PcDesc VALUE_OBJ_CLASS_SPEC { |
|
31 friend class VMStructs; |
|
32 private: |
|
33 int _pc_offset; // offset from start of nmethod |
|
34 int _scope_decode_offset; // offset for scope in nmethod |
|
35 int _obj_decode_offset; |
|
36 |
|
37 public: |
|
38 int pc_offset() const { return _pc_offset; } |
|
39 int scope_decode_offset() const { return _scope_decode_offset; } |
|
40 int obj_decode_offset() const { return _obj_decode_offset; } |
|
41 |
|
42 void set_pc_offset(int x) { _pc_offset = x; } |
|
43 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } |
|
44 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } |
|
45 |
|
46 // Constructor (only used for static in nmethod.cpp) |
|
47 // Also used by ScopeDesc::sender()] |
|
48 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); |
|
49 |
|
50 enum { |
|
51 // upper and lower exclusive limits real offsets: |
|
52 lower_offset_limit = -1, |
|
53 upper_offset_limit = (unsigned int)-1 >> 1 |
|
54 }; |
|
55 |
|
56 // Returns the real pc |
|
57 address real_pc(const nmethod* code) const; |
|
58 |
|
59 void print(nmethod* code); |
|
60 bool verify(nmethod* code); |
|
61 }; |