Mercurial > hg > truffle
annotate src/share/vm/code/pcDesc.hpp @ 3763:e66f38dd58a9
Merge
author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | f95d63e2154a |
children | 5857923e563c 7588156f5cf9 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_CODE_PCDESC_HPP |
26 #define SHARE_VM_CODE_PCDESC_HPP | |
27 | |
28 #include "memory/allocation.hpp" | |
29 | |
0 | 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 | |
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42 union PcDescFlags { |
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43 int word; |
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44 struct { |
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45 unsigned int reexecute: 1; |
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46 unsigned int is_method_handle_invoke: 1; |
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47 unsigned int return_oop: 1; |
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48 } bits; |
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49 bool operator ==(const PcDescFlags& other) { return word == other.word; } |
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50 } _flags; |
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51 |
0 | 52 public: |
53 int pc_offset() const { return _pc_offset; } | |
54 int scope_decode_offset() const { return _scope_decode_offset; } | |
55 int obj_decode_offset() const { return _obj_decode_offset; } | |
56 | |
57 void set_pc_offset(int x) { _pc_offset = x; } | |
58 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } | |
59 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } | |
60 | |
61 // Constructor (only used for static in nmethod.cpp) | |
62 // Also used by ScopeDesc::sender()] | |
63 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); | |
64 | |
65 enum { | |
66 // upper and lower exclusive limits real offsets: | |
67 lower_offset_limit = -1, | |
68 upper_offset_limit = (unsigned int)-1 >> 1 | |
69 }; | |
70 | |
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71 // Flags |
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72 bool should_reexecute() const { return _flags.bits.reexecute; } |
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73 void set_should_reexecute(bool z) { _flags.bits.reexecute = z; } |
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74 |
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75 // Does pd refer to the same information as pd? |
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76 bool is_same_info(const PcDesc* pd) { |
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77 return _scope_decode_offset == pd->_scope_decode_offset && |
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78 _obj_decode_offset == pd->_obj_decode_offset && |
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79 _flags == pd->_flags; |
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80 } |
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81 |
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82 bool is_method_handle_invoke() const { return _flags.bits.is_method_handle_invoke; } |
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83 void set_is_method_handle_invoke(bool z) { _flags.bits.is_method_handle_invoke = z; } |
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84 |
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85 bool return_oop() const { return _flags.bits.return_oop; } |
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86 void set_return_oop(bool z) { _flags.bits.return_oop = z; } |
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87 |
0 | 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 }; | |
1972 | 94 |
95 #endif // SHARE_VM_CODE_PCDESC_HPP |