1 //===- FuzzerDFSan.h - Internal header for the Fuzzer -----------*- C++ -* ===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // DFSan interface. 10 //===----------------------------------------------------------------------===// 11 12 #ifndef LLVM_FUZZER_DFSAN_H 13 #define LLVM_FUZZER_DFSAN_H 14 15 #define LLVM_FUZZER_SUPPORTS_DFSAN 0 16 #if defined(__has_include) 17 # if __has_include(<sanitizer/dfsan_interface.h>) 18 # if defined (__linux__) 19 # undef LLVM_FUZZER_SUPPORTS_DFSAN 20 # define LLVM_FUZZER_SUPPORTS_DFSAN 1 21 # include <sanitizer/dfsan_interface.h> 22 # endif // __linux__ 23 # endif 24 #endif // defined(__has_include) 25 26 #if LLVM_FUZZER_SUPPORTS_DFSAN 27 28 extern "C" { 29 __attribute__((weak)) 30 dfsan_label dfsan_create_label(const char *desc, void *userdata); 31 __attribute__((weak)) 32 void dfsan_set_label(dfsan_label label, void *addr, size_t size); 33 __attribute__((weak)) 34 void dfsan_add_label(dfsan_label label, void *addr, size_t size); 35 __attribute__((weak)) 36 const struct dfsan_label_info *dfsan_get_label_info(dfsan_label label); 37 __attribute__((weak)) 38 dfsan_label dfsan_read_label(const void *addr, size_t size); 39 } // extern "C" 40 41 namespace fuzzer { 42 static bool ReallyHaveDFSan() { 43 return &dfsan_create_label != nullptr; 44 } 45 } // namespace fuzzer 46 #else 47 // When compiling with a compiler which does not support dfsan, 48 // this code is still expected to build (but not necessary work). 49 typedef unsigned short dfsan_label; 50 struct dfsan_label_info { 51 dfsan_label l1, l2; 52 const char *desc; 53 void *userdata; 54 }; 55 namespace fuzzer { 56 static bool ReallyHaveDFSan() { return false; } 57 } // namespace fuzzer 58 59 #endif 60 61 #endif // LLVM_FUZZER_DFSAN_H 62
