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94 lines
2.5 KiB
C++
94 lines
2.5 KiB
C++
//===- FuzzerTracePC.h - Internal header for the Fuzzer ---------*- 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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// fuzzer::TracePC
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_FUZZER_TRACE_PC
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#define LLVM_FUZZER_TRACE_PC
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#include "FuzzerDefs.h"
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#include "FuzzerValueBitMap.h"
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namespace fuzzer {
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class TracePC {
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public:
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void HandleTrace(uintptr_t *guard, uintptr_t PC);
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void HandleInit(uintptr_t *start, uintptr_t *stop);
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void HandleCallerCallee(uintptr_t Caller, uintptr_t Callee);
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void HandleValueProfile(size_t Value) { ValueProfileMap.AddValue(Value); }
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size_t GetTotalPCCoverage() { return TotalPCCoverage; }
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void ResetTotalPCCoverage() { TotalPCCoverage = 0; }
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void SetUseCounters(bool UC) { UseCounters = UC; }
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void SetUseValueProfile(bool VP) { UseValueProfile = VP; }
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bool UpdateCounterMap(ValueBitMap *MaxCounterMap) {
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return MaxCounterMap->MergeFrom(CounterMap);
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}
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bool UpdateValueProfileMap(ValueBitMap *MaxValueProfileMap) {
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return UseValueProfile && MaxValueProfileMap->MergeFrom(ValueProfileMap);
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}
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void FinalizeTrace();
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size_t GetNewPCIDs(uintptr_t **NewPCIDsPtr) {
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*NewPCIDsPtr = NewPCIDs;
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return Min(kMaxNewPCIDs, NumNewPCIDs);
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}
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void ResetNewPCIDs() { NumNewPCIDs = 0; }
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uintptr_t GetPCbyPCID(uintptr_t PCID) { return PCs[PCID]; }
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void ResetMaps() {
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NumNewPCIDs = 0;
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CounterMap.Reset();
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ValueProfileMap.Reset();
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memset(Counters, 0, sizeof(Counters));
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}
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void ResetGuards();
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void PrintModuleInfo();
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void PrintCoverage();
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private:
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bool UseCounters = false;
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bool UseValueProfile = false;
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size_t TotalPCCoverage = 0;
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static const size_t kMaxNewPCIDs = 64;
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uintptr_t NewPCIDs[kMaxNewPCIDs];
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size_t NumNewPCIDs = 0;
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void AddNewPCID(uintptr_t PCID) {
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NewPCIDs[(NumNewPCIDs++) % kMaxNewPCIDs] = PCID;
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}
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struct Module {
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uintptr_t *Start, *Stop;
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};
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Module Modules[4096];
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size_t NumModules = 0;
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size_t NumGuards = 0;
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static const size_t kNumCounters = 1 << 14;
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uint8_t Counters[kNumCounters];
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static const size_t kNumPCs = 1 << 20;
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uintptr_t PCs[kNumPCs];
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ValueBitMap CounterMap;
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ValueBitMap ValueProfileMap;
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};
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extern TracePC TPC;
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} // namespace fuzzer
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#endif // LLVM_FUZZER_TRACE_PC
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