| //===-- Implementation of strcpy ------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/string/strcpy.h" |
| #include "src/string/memcpy.h" |
| #include "src/string/string_utils.h" |
| |
| #include "src/__support/common.h" |
| #include "src/__support/sanitizer.h" |
| |
| namespace __llvm_libc { |
| |
| LLVM_LIBC_FUNCTION(char *, strcpy, |
| (char *__restrict dest, const char *__restrict src)) { |
| size_t size = internal::string_length(src) + 1; |
| char *result = reinterpret_cast<char *>(__llvm_libc::memcpy(dest, src, size)); |
| |
| // In many libc uses, we do not want memcpy to be instrumented. Hence, |
| // we mark the destination as initialized. |
| // |
| // We do not want memcpy to be instrumented because compilers can potentially |
| // generate calls to memcpy. If the sanitizer business logic ends up with a |
| // compiler generated call to memcpy which is instrumented, then it will |
| // break the sanitizers. |
| SANITIZER_MEMORY_INITIALIZED(result, size); |
| |
| return result; |
| } |
| |
| } // namespace __llvm_libc |