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Issue 8337009: Reapply "Support for precise stepping in functions compiled before debugging was started (step 2)" (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Correct default value Created 9 years, 2 months ago
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1 // Copyright 2011 the V8 project authors. All rights reserved. 1 // Copyright 2011 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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136 return 1; 136 return 1;
137 } 137 }
138 138
139 139
140 template <typename T> 140 template <typename T>
141 static int PointerValueCompare(const T* a, const T* b) { 141 static int PointerValueCompare(const T* a, const T* b) {
142 return Compare<T>(*a, *b); 142 return Compare<T>(*a, *b);
143 } 143 }
144 144
145 145
146 // Compare function to compare the object pointer value of two
147 // handlified objects. The handles are passed as pointers to the
148 // handles.
149 template<typename T> class Handle; // Forward declaration.
150 template <typename T>
151 static int HandleObjectPointerCompare(const Handle<T>* a, const Handle<T>* b) {
152 return Compare<T*>(*(*a), *(*b));
153 }
154
155
146 // Returns the smallest power of two which is >= x. If you pass in a 156 // Returns the smallest power of two which is >= x. If you pass in a
147 // number that is already a power of two, it is returned as is. 157 // number that is already a power of two, it is returned as is.
148 // Implementation is from "Hacker's Delight" by Henry S. Warren, Jr., 158 // Implementation is from "Hacker's Delight" by Henry S. Warren, Jr.,
149 // figure 3-3, page 48, where the function is called clp2. 159 // figure 3-3, page 48, where the function is called clp2.
150 static inline uint32_t RoundUpToPowerOf2(uint32_t x) { 160 static inline uint32_t RoundUpToPowerOf2(uint32_t x) {
151 ASSERT(x <= 0x80000000u); 161 ASSERT(x <= 0x80000000u);
152 x = x - 1; 162 x = x - 1;
153 x = x | (x >> 1); 163 x = x | (x >> 1);
154 x = x | (x >> 2); 164 x = x | (x >> 2);
155 x = x | (x >> 4); 165 x = x | (x >> 4);
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916 ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT)); 926 ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT));
917 return 1 << element; 927 return 1 << element;
918 } 928 }
919 929
920 T bits_; 930 T bits_;
921 }; 931 };
922 932
923 } } // namespace v8::internal 933 } } // namespace v8::internal
924 934
925 #endif // V8_UTILS_H_ 935 #endif // V8_UTILS_H_
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