Method UpdateObservedPCs

fuzz/libfuzzer/FuzzerTracePC.cpp:160–200

}

void TracePC::UpdateObservedPCs() {
  std::vector<uintptr_t> CoveredFuncs;
  auto ObservePC = [&](const PCTableEntry *TE) {
    if (ObservedPCs.insert(TE).second && DoPrintNewPCs) {
      PrintPC("\tNEW_PC: %p %F %L", "\tNEW_PC: %p",
              GetNextInstructionPc(TE->PC));
      Printf("\n");
    }
  };

  auto Observe = [&](const PCTableEntry *TE) {
    if (PcIsFuncEntry(TE))
      if (++ObservedFuncs[TE->PC] == 1 && NumPrintNewFuncs)
        CoveredFuncs.push_back(TE->PC);
    ObservePC(TE);
  };

  if (NumPCsInPCTables) {
    if (NumInline8bitCounters == NumPCsInPCTables) {
      for (size_t i = 0; i < NumModules; i++) {
        auto &M = Modules[i];
        assert(M.Size() ==
               (size_t)(ModulePCTable[i].Stop - ModulePCTable[i].Start));
        for (size_t r = 0; r < M.NumRegions; r++) {
          auto &R = M.Regions[r];
          if (!R.Enabled) continue;
          for (uint8_t *P = R.Start; P < R.Stop; P++)
            if (*P)
              Observe(&ModulePCTable[i].Start[M.Idx(P)]);
        }
      }
    }
  }

  for (size_t i = 0, N = Min(CoveredFuncs.size(), NumPrintNewFuncs); i < N;
       i++) {
    Printf("\tNEW_FUNC[%zd/%zd]: ", i + 1, CoveredFuncs.size());
    PrintPC("%p %F %L", "%p", GetNextInstructionPc(CoveredFuncs[i]));
    Printf("\n");
  }
}

uintptr_t TracePC::PCTableEntryIdx(const PCTableEntry *TE) {
  size_t TotalTEs = 0;