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comparison src/share/vm/code/pcDesc.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children 72088be4b386
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-1:000000000000 0:a61af66fc99e
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 };