Mercurial > hg > truffle
annotate src/share/vm/code/pcDesc.hpp @ 5343:20c14eb46238
added GraalOptions.CheckcastMinHintHitProbability to better guide use of hints for checkcasts
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 02 May 2012 17:09:00 +0200 |
parents | e307e8104e12 |
children | 0b646334c5f7 |
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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; | |
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41 GRAAL_ONLY(jlong _leaf_graph_id;) |
0 | 42 |
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43 enum { |
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44 PCDESC_reexecute = 1 << 0, |
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45 PCDESC_is_method_handle_invoke = 1 << 1, |
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46 PCDESC_return_oop = 1 << 2, |
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47 PCDESC_rethrow_exception = 1 << 3 |
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48 }; |
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49 |
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50 int _flags; |
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51 |
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52 void set_flag(int mask, bool z) { |
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53 _flags = z ? (_flags | mask) : (_flags & ~mask); |
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54 } |
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55 |
0 | 56 public: |
57 int pc_offset() const { return _pc_offset; } | |
58 int scope_decode_offset() const { return _scope_decode_offset; } | |
59 int obj_decode_offset() const { return _obj_decode_offset; } | |
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60 jlong leaf_graph_id() const { return GRAAL_ONLY(_leaf_graph_id) NOT_GRAAL(-1); } |
0 | 61 |
62 void set_pc_offset(int x) { _pc_offset = x; } | |
63 void set_scope_decode_offset(int x) { _scope_decode_offset = x; } | |
64 void set_obj_decode_offset(int x) { _obj_decode_offset = x; } | |
65 | |
66 // Constructor (only used for static in nmethod.cpp) | |
67 // Also used by ScopeDesc::sender()] | |
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68 PcDesc(int pc_offset, int scope_decode_offset, int obj_decode_offset, jlong leaf_graph_id); |
0 | 69 |
70 enum { | |
71 // upper and lower exclusive limits real offsets: | |
72 lower_offset_limit = -1, | |
73 upper_offset_limit = (unsigned int)-1 >> 1 | |
74 }; | |
75 | |
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76 // Flags |
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77 bool rethrow_exception() const { return (_flags & PCDESC_rethrow_exception) != 0; } |
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78 void set_rethrow_exception(bool z) { set_flag(PCDESC_rethrow_exception, z); } |
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79 bool should_reexecute() const { return (_flags & PCDESC_reexecute) != 0; } |
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80 void set_should_reexecute(bool z) { set_flag(PCDESC_reexecute, z); } |
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81 |
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82 // Does pd refer to the same information as pd? |
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83 bool is_same_info(const PcDesc* pd) { |
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84 return _scope_decode_offset == pd->_scope_decode_offset && |
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85 _obj_decode_offset == pd->_obj_decode_offset && |
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86 _flags == pd->_flags |
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87 GRAAL_ONLY(&& _leaf_graph_id == pd->_leaf_graph_id) |
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88 ; |
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89 } |
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90 |
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91 bool is_method_handle_invoke() const { return (_flags & PCDESC_is_method_handle_invoke) != 0; } |
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92 void set_is_method_handle_invoke(bool z) { set_flag(PCDESC_is_method_handle_invoke, z); } |
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93 |
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94 bool return_oop() const { return (_flags & PCDESC_return_oop) != 0; } |
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95 void set_return_oop(bool z) { set_flag(PCDESC_return_oop, z); } |
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96 |
0 | 97 // Returns the real pc |
98 address real_pc(const nmethod* code) const; | |
99 | |
100 void print(nmethod* code); | |
101 bool verify(nmethod* code); | |
102 }; | |
1972 | 103 |
104 #endif // SHARE_VM_CODE_PCDESC_HPP |