1 /*
2 * Copyright (c) 1997, 2009, 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 // 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 union PcDescFlags {
38 int word;
39 struct {
40 unsigned int reexecute: 1;
41 unsigned int is_method_handle_invoke: 1;
42 unsigned int return_oop: 1;
43 } bits;
44 bool operator ==(const PcDescFlags& other) { return word == other.word; }
69
70 // Does pd refer to the same information as pd?
71 bool is_same_info(const PcDesc* pd) {
72 return _scope_decode_offset == pd->_scope_decode_offset &&
73 _obj_decode_offset == pd->_obj_decode_offset &&
74 _flags == pd->_flags;
75 }
76
77 bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; }
78 void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; }
79
80 bool return_oop() const { return _flags.bits.return_oop; }
81 void set_return_oop(bool z) { _flags.bits.return_oop = z; }
82
83 // Returns the real pc
84 address real_pc(const nmethod* code) const;
85
86 void print(nmethod* code);
87 bool verify(nmethod* code);
88 };
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1 /*
2 * Copyright (c) 1997, 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 SHARE_VM_CODE_PCDESC_HPP
26 #define SHARE_VM_CODE_PCDESC_HPP
27
28 #include "memory/allocation.hpp"
29
30 // PcDescs map a physical PC (given as offset from start of nmethod) to
31 // the corresponding source scope and byte code index.
32
33 class nmethod;
34
35 class PcDesc VALUE_OBJ_CLASS_SPEC {
36 friend class VMStructs;
37 private:
38 int _pc_offset; // offset from start of nmethod
39 int _scope_decode_offset; // offset for scope in nmethod
40 int _obj_decode_offset;
41
42 union PcDescFlags {
43 int word;
44 struct {
45 unsigned int reexecute: 1;
46 unsigned int is_method_handle_invoke: 1;
47 unsigned int return_oop: 1;
48 } bits;
49 bool operator ==(const PcDescFlags& other) { return word == other.word; }
74
75 // Does pd refer to the same information as pd?
76 bool is_same_info(const PcDesc* pd) {
77 return _scope_decode_offset == pd->_scope_decode_offset &&
78 _obj_decode_offset == pd->_obj_decode_offset &&
79 _flags == pd->_flags;
80 }
81
82 bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; }
83 void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; }
84
85 bool return_oop() const { return _flags.bits.return_oop; }
86 void set_return_oop(bool z) { _flags.bits.return_oop = z; }
87
88 // Returns the real pc
89 address real_pc(const nmethod* code) const;
90
91 void print(nmethod* code);
92 bool verify(nmethod* code);
93 };
94
95 #endif // SHARE_VM_CODE_PCDESC_HPP
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