src/libcompiler_builtins/compiler-rt/test/fuzzer/DSOTestMain.cpp

   1 // This file is distributed under the University of Illinois Open Source
   2 // License. See LICENSE.TXT for details.
   3
   4 // Source code for a simple DSO.
   5
   6 #include <cstdint>
   7 #include <cstdio>
   8 #include <cstdlib>
   9 #include <cstring>
  10 extern int DSO1(int a);
  11 extern int DSO2(int a);
  12 extern int DSOTestExtra(int a);
  13
  14 static volatile int *nil = 0;
  15
  16 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  17   int x, y, z;
  18   if (Size < sizeof(int) * 3) {
  19     x = y = z = 0;
  20   } else {
  21     memcpy(&x, Data + 0 * sizeof(int), sizeof(int));
  22     memcpy(&y, Data + 1 * sizeof(int), sizeof(int));
  23     memcpy(&z, Data + 2 * sizeof(int), sizeof(int));
  24   }
  25   int sum = DSO1(x) + DSO2(y) + (z ? DSOTestExtra(z) : 0);
  26   if (sum == 3) {
  27     fprintf(stderr, "BINGO %d %d %d\n", x, y, z);
  28     *nil = 0;
  29   }
  30   return 0;
  31 }