tools/fuzzing/libfuzzer/FuzzerBuiltins.h

   1 //===- FuzzerBuiltins.h - Internal header for builtins ----------*- 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 // Wrapper functions and marcos around builtin functions.
   9 //===----------------------------------------------------------------------===//
  10
  11 #ifndef LLVM_FUZZER_BUILTINS_H
  12 #define LLVM_FUZZER_BUILTINS_H
  13
  14 #include "FuzzerPlatform.h"
  15
  16 #if !LIBFUZZER_MSVC
  17 #include <cstdint>
  18
  19 #define GET_CALLER_PC() __builtin_return_address(0)
  20
  21 namespace fuzzer {
  22
  23 inline uint8_t  Bswap(uint8_t x)  { return x; }
  24 inline uint16_t Bswap(uint16_t x) { return __builtin_bswap16(x); }
  25 inline uint32_t Bswap(uint32_t x) { return __builtin_bswap32(x); }
  26 inline uint64_t Bswap(uint64_t x) { return __builtin_bswap64(x); }
  27
  28 inline uint32_t Clzll(unsigned long long X) { return __builtin_clzll(X); }
  29 inline uint32_t Clz(unsigned long long X) { return __builtin_clz(X); }
  30 inline int Popcountll(unsigned long long X) { return __builtin_popcountll(X); }
  31
  32 }  // namespace fuzzer
  33
  34 #endif  // !LIBFUZZER_MSVC
  35 #endif  // LLVM_FUZZER_BUILTINS_H