| //===- FuzzerTracePC.h - INTERNAL - Path tracer. --------*- C++ -* ===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // Trace PCs. |
| // This module implements __sanitizer_cov_trace_pc, a callback required |
| // for -fsanitize-coverage=trace-pc instrumentation. |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_FUZZER_TRACE_PC_H |
| #define LLVM_FUZZER_TRACE_PC_H |
| |
| namespace fuzzer { |
| struct PcCoverageMap { |
| static const size_t kMapSizeInBits = 65371; // Prime. |
| static const size_t kMapSizeInBitsAligned = 65536; // 2^16 |
| static const size_t kBitsInWord = (sizeof(uintptr_t) * 8); |
| static const size_t kMapSizeInWords = kMapSizeInBitsAligned / kBitsInWord; |
| |
| void Reset(); |
| inline void Update(uintptr_t Addr); |
| size_t MergeFrom(const PcCoverageMap &Other); |
| |
| uintptr_t Map[kMapSizeInWords] __attribute__((aligned(512))); |
| }; |
| |
| // Clears the current PC Map. |
| void PcMapResetCurrent(); |
| // Merges the current PC Map into the combined one, and clears the former. |
| size_t PcMapMergeInto(PcCoverageMap *Map); |
| } |
| |
| #endif |