1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // UNSUPPORTED: c++03, c++11
10 
11 #include <algorithm>
12 #include <cstddef>
13 #include <cstdint>
14 #include <vector>
15 
16 #include "fuzz.h"
17 
LLVMFuzzerTestOneInput(const std::uint8_t * data,std::size_t size)18 extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t *data, std::size_t size) {
19     if (size < 2)
20         return 0;
21     std::vector<std::uint8_t> working(data, data + size);
22     std::make_heap(working.begin(), working.end());
23 
24     // Pop things off, one at a time
25     auto iter = --working.end();
26     while (iter != working.begin()) {
27         std::pop_heap(working.begin(), iter);
28         if (!std::is_heap(working.begin(), --iter))
29             return 2;
30     }
31 
32     return 0;
33 }
34