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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. | 1 // Copyright (c) 1994-2006 Sun Microsystems Inc. |
2 // All Rights Reserved. | 2 // All Rights Reserved. |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted provided that the following conditions are | 5 // modification, are permitted provided that the following conditions are |
6 // met: | 6 // met: |
7 // | 7 // |
8 // - Redistributions of source code must retain the above copyright notice, | 8 // - Redistributions of source code must retain the above copyright notice, |
9 // this list of conditions and the following disclaimer. | 9 // this list of conditions and the following disclaimer. |
10 // | 10 // |
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91 int jit_cookie_; | 91 int jit_cookie_; |
92 bool emit_debug_code_; | 92 bool emit_debug_code_; |
93 bool predictable_code_size_; | 93 bool predictable_code_size_; |
94 }; | 94 }; |
95 | 95 |
96 | 96 |
97 // Avoids using instructions that vary in size in unpredictable ways between the | 97 // Avoids using instructions that vary in size in unpredictable ways between the |
98 // snapshot and the running VM. | 98 // snapshot and the running VM. |
99 class PredictableCodeSizeScope { | 99 class PredictableCodeSizeScope { |
100 public: | 100 public: |
101 explicit PredictableCodeSizeScope(AssemblerBase* assembler) | 101 PredictableCodeSizeScope(AssemblerBase* assembler, int expected_size); |
102 : assembler_(assembler) { | 102 ~PredictableCodeSizeScope(); |
103 old_value_ = assembler_->predictable_code_size(); | |
104 assembler_->set_predictable_code_size(true); | |
105 } | |
106 | |
107 ~PredictableCodeSizeScope() { | |
108 assembler_->set_predictable_code_size(old_value_); | |
109 } | |
110 | 103 |
111 private: | 104 private: |
112 AssemblerBase* assembler_; | 105 AssemblerBase* assembler_; |
| 106 int expected_size_; |
| 107 int start_offset_; |
113 bool old_value_; | 108 bool old_value_; |
114 }; | 109 }; |
115 | 110 |
116 | 111 |
117 // ----------------------------------------------------------------------------- | 112 // ----------------------------------------------------------------------------- |
118 // Labels represent pc locations; they are typically jump or call targets. | 113 // Labels represent pc locations; they are typically jump or call targets. |
119 // After declaration, a label can be freely used to denote known or (yet) | 114 // After declaration, a label can be freely used to denote known or (yet) |
120 // unknown pc location. Assembler::bind() is used to bind a label to the | 115 // unknown pc location. Assembler::bind() is used to bind a label to the |
121 // current pc. A label can be bound only once. | 116 // current pc. A label can be bound only once. |
122 | 117 |
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952 public: | 947 public: |
953 NullCallWrapper() { } | 948 NullCallWrapper() { } |
954 virtual ~NullCallWrapper() { } | 949 virtual ~NullCallWrapper() { } |
955 virtual void BeforeCall(int call_size) const { } | 950 virtual void BeforeCall(int call_size) const { } |
956 virtual void AfterCall() const { } | 951 virtual void AfterCall() const { } |
957 }; | 952 }; |
958 | 953 |
959 } } // namespace v8::internal | 954 } } // namespace v8::internal |
960 | 955 |
961 #endif // V8_ASSEMBLER_H_ | 956 #endif // V8_ASSEMBLER_H_ |
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