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