| //===- FuzzerDFSan.h - Internal header for the Fuzzer -----------*- C++ -* ===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // DFSan interface. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_FUZZER_DFSAN_H |
| #define LLVM_FUZZER_DFSAN_H |
| |
| #define LLVM_FUZZER_SUPPORTS_DFSAN 0 |
| #if defined(__has_include) |
| # if __has_include(<sanitizer/dfsan_interface.h>) |
| # if defined (__linux__) |
| # undef LLVM_FUZZER_SUPPORTS_DFSAN |
| # define LLVM_FUZZER_SUPPORTS_DFSAN 1 |
| # include <sanitizer/dfsan_interface.h> |
| # endif // __linux__ |
| # endif |
| #endif // defined(__has_include) |
| |
| #if LLVM_FUZZER_SUPPORTS_DFSAN |
| |
| extern "C" { |
| __attribute__((weak)) |
| dfsan_label dfsan_create_label(const char *desc, void *userdata); |
| __attribute__((weak)) |
| void dfsan_set_label(dfsan_label label, void *addr, size_t size); |
| __attribute__((weak)) |
| void dfsan_add_label(dfsan_label label, void *addr, size_t size); |
| __attribute__((weak)) |
| const struct dfsan_label_info *dfsan_get_label_info(dfsan_label label); |
| __attribute__((weak)) |
| dfsan_label dfsan_read_label(const void *addr, size_t size); |
| } // extern "C" |
| |
| namespace fuzzer { |
| static bool ReallyHaveDFSan() { |
| return &dfsan_create_label != nullptr; |
| } |
| } // namespace fuzzer |
| #else |
| // When compiling with a compiler which does not support dfsan, |
| // this code is still expected to build (but not necessary work). |
| typedef unsigned short dfsan_label; |
| struct dfsan_label_info { |
| dfsan_label l1, l2; |
| const char *desc; |
| void *userdata; |
| }; |
| namespace fuzzer { |
| static bool ReallyHaveDFSan() { return false; } |
| } // namespace fuzzer |
| |
| #endif |
| |
| #endif // LLVM_FUZZER_DFSAN_H |