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)
19
20asm("memcpy = __sanitizer_internal_memcpy");
21asm("memmove = __sanitizer_internal_memmove");
22asm("memset = __sanitizer_internal_memset");
23
24# if defined(__cplusplus) && \
25 !defined(SANITIZER_COMMON_REDEFINE_BUILTINS_IN_STD)
26
27// The builtins should not be redefined in source files that make use of C++
28// standard libraries, in particular where C++STL headers with inline functions
29// are used. The redefinition in such cases would lead to ODR violations.
30//
31// Try to break the build in common cases where builtins shouldn't be redefined.
32namespace std {
33class Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file {
34 Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file(
35 const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete;
36 Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file& operator=(
37 const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete;
38};
39using array = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
40using atomic = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
41using function = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
42using map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
43using set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
44using shared_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
45using string = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
46using unique_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
47using unordered_map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
48using unordered_set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
49using vector = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
50} // namespace std
51
52# endif // __cpluplus
53# endif // !_WIN32
54
55# endif // SANITIZER_REDEFINE_BUILTINS_H
56#endif // SANITIZER_COMMON_NO_REDEFINE_BUILTINS
57