1 //===-- Safe nullptr check --------------------------------------*- 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 #ifndef LLVM_LIBC_SRC___SUPPORT_MACROS_NULL_CHECK_H 10 #define LLVM_LIBC_SRC___SUPPORT_MACROS_NULL_CHECK_H 11 12 #include "src/__support/macros/config.h" 13 #include "src/__support/macros/optimization.h" 14 #include "src/__support/macros/sanitizer.h" 15 16 #if defined(LIBC_ADD_NULL_CHECKS) && !defined(LIBC_HAS_SANITIZER) 17 #define LIBC_CRASH_ON_NULLPTR(ptr) \ 18 do { \ 19 if (LIBC_UNLIKELY((ptr) == nullptr)) \ 20 __builtin_trap(); \ 21 } while (0) 22 #define LIBC_CRASH_ON_VALUE(var, value) \ 23 do { \ 24 if (LIBC_UNLIKELY((var) == (value))) \ 25 __builtin_trap(); \ 26 } while (0) 27 28 #else 29 #define LIBC_CRASH_ON_NULLPTR(ptr) \ 30 do { \ 31 } while (0) 32 #define LIBC_CRASH_ON_VALUE(var, value) \ 33 do { \ 34 } while (0) 35 #endif 36 37 #endif // LLVM_LIBC_SRC___SUPPORT_MACROS_NULL_CHECK_H 38