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