xref: /llvm-project/compiler-rt/test/fuzzer/ShrinkValueProfileTest.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 // Test that we can find the minimal item in the corpus (4 bytes: "FUZZ").
6 #include <cstddef>
7 #include <cstdint>
8 #include <cstdio>
9 #include <cstdlib>
10 #include <cstring>
11 
12 static volatile uint32_t Sink;
13 
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)14 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
15   if (Size < sizeof(uint32_t)) return 0;
16   uint32_t X, Y;
17   size_t Offset = Size < 8 ? 0 : Size / 2;
18   memcpy(&X, Data + Offset, sizeof(uint32_t));
19   memcpy(&Y, "FUZZ", sizeof(uint32_t));
20   Sink = X == Y;
21   return 0;
22 }
23 
24