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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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93 // generate the code if not already generated and instead return a | 93 // generate the code if not already generated and instead return a |
94 // retry after GC Failure object. | 94 // retry after GC Failure object. |
95 Object* TryGetCode(); | 95 Object* TryGetCode(); |
96 | 96 |
97 static Major MajorKeyFromKey(uint32_t key) { | 97 static Major MajorKeyFromKey(uint32_t key) { |
98 return static_cast<Major>(MajorKeyBits::decode(key)); | 98 return static_cast<Major>(MajorKeyBits::decode(key)); |
99 }; | 99 }; |
100 static int MinorKeyFromKey(uint32_t key) { | 100 static int MinorKeyFromKey(uint32_t key) { |
101 return MinorKeyBits::decode(key); | 101 return MinorKeyBits::decode(key); |
102 }; | 102 }; |
103 static const char* MajorName(Major major_key); | 103 static const char* MajorName(Major major_key, bool allow_unknown_keys); |
104 | 104 |
105 virtual ~CodeStub() {} | 105 virtual ~CodeStub() {} |
106 | 106 |
107 // Override these methods to provide a custom caching mechanism for | 107 // Override these methods to provide a custom caching mechanism for |
108 // an individual type of code stub. | 108 // an individual type of code stub. |
109 virtual bool GetCustomCache(Code** code_out) { return false; } | 109 virtual bool GetCustomCache(Code** code_out) { return false; } |
110 virtual void SetCustomCache(Code* value) { } | 110 virtual void SetCustomCache(Code* value) { } |
111 virtual bool has_custom_cache() { return false; } | 111 virtual bool has_custom_cache() { return false; } |
112 | 112 |
113 protected: | 113 protected: |
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131 | 131 |
132 // Returns information for computing the number key. | 132 // Returns information for computing the number key. |
133 virtual Major MajorKey() = 0; | 133 virtual Major MajorKey() = 0; |
134 virtual int MinorKey() = 0; | 134 virtual int MinorKey() = 0; |
135 | 135 |
136 // The CallFunctionStub needs to override this so it can encode whether a | 136 // The CallFunctionStub needs to override this so it can encode whether a |
137 // lazily generated function should be fully optimized or not. | 137 // lazily generated function should be fully optimized or not. |
138 virtual InLoopFlag InLoop() { return NOT_IN_LOOP; } | 138 virtual InLoopFlag InLoop() { return NOT_IN_LOOP; } |
139 | 139 |
140 // Returns a name for logging/debugging purposes. | 140 // Returns a name for logging/debugging purposes. |
141 virtual const char* GetName() { return MajorName(MajorKey()); } | 141 virtual const char* GetName() { return MajorName(MajorKey(), false); } |
142 | 142 |
143 #ifdef DEBUG | 143 #ifdef DEBUG |
144 virtual void Print() { PrintF("%s\n", GetName()); } | 144 virtual void Print() { PrintF("%s\n", GetName()); } |
145 #endif | 145 #endif |
146 | 146 |
147 // Computes the key based on major and minor. | 147 // Computes the key based on major and minor. |
148 uint32_t GetKey() { | 148 uint32_t GetKey() { |
149 ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); | 149 ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); |
150 return MinorKeyBits::encode(MinorKey()) | | 150 return MinorKeyBits::encode(MinorKey()) | |
151 MajorKeyBits::encode(MajorKey()); | 151 MajorKeyBits::encode(MajorKey()); |
152 } | 152 } |
153 | 153 |
154 bool AllowsStubCalls() { return MajorKey() <= RecordWrite; } | 154 bool AllowsStubCalls() { return MajorKey() <= RecordWrite; } |
155 | 155 |
156 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; | 156 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; |
157 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; | 157 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; |
158 | 158 |
159 friend class BreakPointIterator; | 159 friend class BreakPointIterator; |
160 }; | 160 }; |
161 | 161 |
162 } } // namespace v8::internal | 162 } } // namespace v8::internal |
163 | 163 |
164 #endif // V8_CODE_STUBS_H_ | 164 #endif // V8_CODE_STUBS_H_ |
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