Mercurial > hg > truffle
annotate src/share/vm/code/pcDesc.hpp @ 1071:b18963243361
6902000: use ShouldNotReachHere() for btos/ctos/stos in TemplateInterpreterGenerator::set_short_entry_points
Summary: set_entry_point is only ever used with the tos states of bytecode templates in templateTable.cpp and none of those use the subword tos states like btos, ctos and stos.
Reviewed-by: kvn
author | twisti |
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date | Thu, 19 Nov 2009 03:41:29 -0800 |
parents | 8e954aedbb81 |
children | e66fd840cb6b |
rev | line source |
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0 | 1 /* |
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2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 * | |
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 | |
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37 union PcDescFlags { |
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38 int word; |
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39 struct { |
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40 unsigned int reexecute: 1; |
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41 } bits; |
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42 bool operator ==(const PcDescFlags& other) { return word == other.word; } |
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43 } _flags; |
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44 |
0 | 45 public: |
46 int pc_offset() const { return _pc_offset; } | |
47 int scope_decode_offset() const { return _scope_decode_offset; } | |
48 int obj_decode_offset() const { return _obj_decode_offset; } | |
49 | |
50 void set_pc_offset(int x) { _pc_offset = x; } | |
51 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } | |
52 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } | |
53 | |
54 // Constructor (only used for static in nmethod.cpp) | |
55 // Also used by ScopeDesc::sender()] | |
56 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset); | |
57 | |
58 enum { | |
59 // upper and lower exclusive limits real offsets: | |
60 lower_offset_limit = -1, | |
61 upper_offset_limit = (unsigned int)-1 >> 1 | |
62 }; | |
63 | |
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64 // Flags |
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65 bool should_reexecute() const { return _flags.bits.reexecute; } |
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66 void set_should_reexecute(bool z) { _flags.bits.reexecute = z; } |
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67 |
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68 // Does pd refer to the same information as pd? |
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69 bool is_same_info(const PcDesc* pd) { |
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70 return _scope_decode_offset == pd->_scope_decode_offset && |
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71 _obj_decode_offset == pd->_obj_decode_offset && |
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72 _flags == pd->_flags; |
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73 } |
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74 |
0 | 75 // Returns the real pc |
76 address real_pc(const nmethod* code) const; | |
77 | |
78 void print(nmethod* code); | |
79 bool verify(nmethod* code); | |
80 }; |