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author | Dimitry Andric <dim@FreeBSD.org> | 2023-07-26 19:03:47 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2023-07-26 19:04:23 +0000 |
commit | 7fa27ce4a07f19b07799a767fc29416f3b625afb (patch) | |
tree | 27825c83636c4de341eb09a74f49f5d38a15d165 /compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h | |
parent | e3b557809604d036af6e00c60f012c2025b59a5e (diff) | |
download | src-7fa27ce4a07f19b07799a767fc29416f3b625afb.tar.gz src-7fa27ce4a07f19b07799a767fc29416f3b625afb.zip |
Diffstat (limited to 'compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h')
-rw-r--r-- | compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h b/compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h new file mode 100644 index 000000000000..6649ff5844f5 --- /dev/null +++ b/compiler-rt/lib/sanitizer_common/sanitizer_redefine_builtins.h @@ -0,0 +1,52 @@ +//===-- sanitizer_redefine_builtins.h ---------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// Redefine builtin functions to use internal versions. This is needed where +// compiler optimizations end up producing unwanted libcalls! +// +//===----------------------------------------------------------------------===// +#ifndef SANITIZER_COMMON_NO_REDEFINE_BUILTINS +#ifndef SANITIZER_REDEFINE_BUILTINS_H +#define SANITIZER_REDEFINE_BUILTINS_H + +// The asm hack only works with GCC and Clang. +#if !defined(_WIN32) + +asm("memcpy = __sanitizer_internal_memcpy"); +asm("memmove = __sanitizer_internal_memmove"); +asm("memset = __sanitizer_internal_memset"); + +// The builtins should not be redefined in source files that make use of C++ +// standard libraries, in particular where C++STL headers with inline functions +// are used. The redefinition in such cases would lead to ODR violations. +// +// Try to break the build in common cases where builtins shouldn't be redefined. +namespace std { +class Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file { + Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file( + const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete; + Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file& operator=( + const Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file&) = delete; +}; +using array = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using atomic = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using function = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using shared_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using string = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using unique_ptr = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using unordered_map = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using unordered_set = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +using vector = Define_SANITIZER_COMMON_NO_REDEFINE_BUILTINS_in_cpp_file; +} // namespace std + +#endif // !_WIN32 + +#endif // SANITIZER_REDEFINE_BUILTINS_H +#endif // SANITIZER_COMMON_NO_REDEFINE_BUILTINS |