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) && !defined(__APPLE__)
19
20# if defined(__hexagon__)
21
22# define SANITIZER_REDEFINE_BUILTIN_ASM(name) \
23 asm(".set " #name ", __sanitizer_internal_" #name)
24
25# else
26
27# define SANITIZER_REDEFINE_BUILTIN_ASM(name) \
28 asm(#name " = __sanitizer_internal_" #name)
29
30# endif
31
32SANITIZER_REDEFINE_BUILTIN_ASM(memcpy);
33SANITIZER_REDEFINE_BUILTIN_ASM(memmove);
34SANITIZER_REDEFINE_BUILTIN_ASM(memset);
35
36# undef SANITIZER_REDEFINE_BUILTIN_ASM
37
38# if defined(__cplusplus) && \
39 !defined(SANITIZER_COMMON_REDEFINE_BUILTINS_IN_STD)
40
41// The builtins should not be redefined in source files that make use of C++
42// standard libraries, in particular where C++STL headers with inline functions
43// are used. The redefinition in such cases would lead to ODR violations.
44//
45// Try to break the build in common cases where builtins shouldn't be redefined.
46namespace std {
47class Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file {
48 Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file(
49 const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete;
50 Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file& operator=(
51 const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete;
52};
53using array = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
54using atomic = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
55using function = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
56using map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
57using set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
58using shared_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
59using string = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
60using unique_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
61using unordered_map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
62using unordered_set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
63using vector = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file;
64} // namespace std
65
66# endif // __cpluplus
67# endif // !_WIN32
68
69# endif // SANITIZER_REDEFINE_BUILTINS_H
70#endif // SANITIZER_COMMON_NO_REDEFINE_BUILTINS
71