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#include <stdint.h>
6#include <stdio.h>
7#include <stdlib.h>
8
9// Dummy functions used to avoid dependency on AFL.
10extern "C" void __afl_manual_init() {}
11
12extern "C" int __afl_persistent_loop(unsigned int N) {
13 static int Count = N;
14 fprintf(stderr, format: "__afl_persistent_loop called, Count = %d\n", Count);
15 return Count--;
16}
17
18// This declaration exists to prevent the Darwin linker
19// from complaining about this being a missing weak symbol.
20extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv) {
21 return 0;
22}
23
24extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
25 puts(s: "STDOUT MESSAGE");
26 fflush(stdout);
27 fprintf(stderr, format: "STDERR MESSAGE\n"
28 "LLVMFuzzerTestOneInput called; Size = %zd\n",
29 Size);
30 if (Size < 4)
31 return 0;
32
33 return Data[Size];
34}
35

source code of compiler-rt/test/fuzzer/AFLDriverTest.cpp