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36093749 | 1 | //===-- sanitizer_win_weak_interception.h ---------------------------------===// |
2 | // | |
2fc4da48 | 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. | |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
36093749 | 6 | // |
7 | //===----------------------------------------------------------------------===// | |
8 | // This header provide helper macros to delegate calls of weak functions to the | |
9 | // implementation in the main executable when a strong definition is present. | |
10 | //===----------------------------------------------------------------------===// | |
11 | #ifndef SANITIZER_WIN_WEAK_INTERCEPTION_H | |
12 | #define SANITIZER_WIN_WEAK_INTERCEPTION_H | |
13 | #include "sanitizer_internal_defs.h" | |
14 | ||
15 | namespace __sanitizer { | |
16 | int interceptWhenPossible(uptr dll_function, const char *real_function); | |
17 | } | |
18 | ||
19 | // ----------------- Function interception helper macros -------------------- // | |
20 | // Weak functions, could be redefined in the main executable, but that is not | |
21 | // necessary, so we shouldn't die if we can not find a reference. | |
22 | #define INTERCEPT_WEAK(Name) interceptWhenPossible((uptr) Name, #Name); | |
23 | ||
24 | #define INTERCEPT_SANITIZER_WEAK_FUNCTION(Name) \ | |
25 | static int intercept_##Name() { \ | |
26 | return __sanitizer::interceptWhenPossible((__sanitizer::uptr) Name, #Name);\ | |
27 | } \ | |
28 | __pragma(section(".WEAK$M", long, read)) \ | |
29 | __declspec(allocate(".WEAK$M")) int (*__weak_intercept_##Name)() = \ | |
30 | intercept_##Name; | |
31 | ||
32 | #endif // SANITIZER_WIN_WEAK_INTERCEPTION_H |