llvm-project/llvm/lib/Fuzzer/test/MemcmpTest.cpp

// Simple test for a fuzzer. The fuzzer must find a particular string.
#include <cstring>
#include <cstdint>
#include <cstdio>
#include <cstdlib>

extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  // TODO: check other sizes.
  if (Size >= 8 && memcmp(Data, "01234567", 8) == 0) {
    if (Size >= 12 && memcmp(Data + 8, "ABCD", 4) == 0) {
      if (Size >= 14 && memcmp(Data + 12, "XY", 2) == 0) {
        fprintf(stderr, "BINGO\n");
        exit(1);
      }
    }
  }
}