compiler-rt/test/fuzzer/AlignmentAssumptionTest.cpp

   1 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   2 // See https://llvm.org/LICENSE.txt for license information.
   3 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   4
   5 // Test for alignment assumption failure.
   6
   7 #include <assert.h>
   8 #include <climits>
   9 #include <cstddef>
  10 #include <cstdint>
  11 #include <cstdlib>
  12 #include <iostream>
  13
  14 static volatile int32_t Sink;
  15
  16 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  17   assert(Data);
  18   if (Size > 0 && Data[0] == 'H') {
  19     Sink = 1;
  20     if (Size > 1 && Data[1] == 'i') {
  21       Sink = 2;
  22       if (Size > 2 && Data[2] == '!') {
  23         auto r = __builtin_assume_aligned(Data + 1, 0x8000);
  24       }
  25     }
  26   }
  27   return 0;
  28 }