xref: /llvm-project/compiler-rt/test/fuzzer/NullDerefOnEmptyTest.cpp (revision 2946cd701067404b99c39fb29dc9c74bd7193eb3)
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 // Simple test for a fuzzer. The fuzzer must find the empty string.
6 #include <cstddef>
7 #include <cstdint>
8 #include <cstdlib>
9 #include <iostream>
10 
11 static volatile int *Null = 0;
12 
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)13 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
14   if (Size == 0) {
15     std::cout << "Found the target, dereferencing NULL\n";
16     *Null = 1;
17   }
18   return 0;
19 }
20 
21