| 1 | //===-- sanitizer_redefine_builtins.h ---------------------------*- C++ -*-===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Redefine builtin functions to use internal versions. This is needed where |
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| 10 | // compiler optimizations end up producing unwanted libcalls! |
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| 11 | // |
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| 12 | //===----------------------------------------------------------------------===// |
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| 13 | #ifndef SANITIZER_COMMON_NO_REDEFINE_BUILTINS |
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| 14 | # ifndef SANITIZER_REDEFINE_BUILTINS_H |
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| 15 | # define SANITIZER_REDEFINE_BUILTINS_H |
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| 16 | |
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| 17 | // The asm hack only works with GCC and Clang. |
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| 18 | # if !defined(_WIN32) |
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| 19 | |
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| 20 | asm(R"( |
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| 21 | .set memcpy, __sanitizer_internal_memcpy |
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| 22 | .set memmove, __sanitizer_internal_memmove |
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| 23 | .set memset, __sanitizer_internal_memset |
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| 24 | )" ); |
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| 25 | |
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| 26 | # if defined(__cplusplus) && \ |
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| 27 | !defined(SANITIZER_COMMON_REDEFINE_BUILTINS_IN_STD) |
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| 28 | |
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| 29 | // The builtins should not be redefined in source files that make use of C++ |
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| 30 | // standard libraries, in particular where C++STL headers with inline functions |
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| 31 | // are used. The redefinition in such cases would lead to ODR violations. |
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| 32 | // |
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| 33 | // Try to break the build in common cases where builtins shouldn't be redefined. |
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| 34 | namespace std { |
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| 35 | class Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file { |
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| 36 | Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file( |
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| 37 | const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete; |
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| 38 | Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file& operator=( |
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| 39 | const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete; |
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| 40 | }; |
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| 41 | using array = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 42 | using atomic = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 43 | using function = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 44 | using map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 45 | using set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 46 | using shared_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 47 | using string = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 48 | using unique_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 49 | using unordered_map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 50 | using unordered_set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 51 | using vector = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; |
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| 52 | } // namespace std |
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| 53 | |
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| 54 | # endif // __cpluplus |
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| 55 | # endif // !_WIN32 |
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| 56 | |
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| 57 | # endif // SANITIZER_REDEFINE_BUILTINS_H |
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| 58 | #endif // SANITIZER_COMMON_NO_REDEFINE_BUILTINS |
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| 59 | |
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