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1 //===-- sanitizer_win_weak_interception.h ---------------------------------===//
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2 //
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3 // This file is distributed under the University of Illinois Open Source
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4 // License. See LICENSE.TXT for details.
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5 //
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6 //===----------------------------------------------------------------------===//
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7 // This header provide helper macros to delegate calls of weak functions to the
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8 // implementation in the main executable when a strong definition is present.
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9 //===----------------------------------------------------------------------===//
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10 #ifndef SANITIZER_WIN_WEAK_INTERCEPTION_H
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11 #define SANITIZER_WIN_WEAK_INTERCEPTION_H
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12 #include "sanitizer_internal_defs.h"
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13
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14 namespace __sanitizer {
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15 int interceptWhenPossible(uptr dll_function, const char *real_function);
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16 }
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17
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18 // ----------------- Function interception helper macros -------------------- //
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19 // Weak functions, could be redefined in the main executable, but that is not
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20 // necessary, so we shouldn't die if we can not find a reference.
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21 #define INTERCEPT_WEAK(Name) interceptWhenPossible((uptr) Name, #Name);
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22
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23 #define INTERCEPT_SANITIZER_WEAK_FUNCTION(Name) \
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24 static int intercept_##Name() { \
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25 return __sanitizer::interceptWhenPossible((__sanitizer::uptr) Name, #Name);\
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26 } \
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27 __pragma(section(".WEAK$M", long, read)) \
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28 __declspec(allocate(".WEAK$M")) int (*__weak_intercept_##Name)() = \
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29 intercept_##Name;
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30
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31 #endif // SANITIZER_WIN_WEAK_INTERCEPTION_H
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