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Diffstat (limited to '')
-rw-r--r-- | third_party/immer/extra/fuzzer/map-gc.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/third_party/immer/extra/fuzzer/map-gc.cpp b/third_party/immer/extra/fuzzer/map-gc.cpp new file mode 100644 index 000000000000..835f37a05897 --- /dev/null +++ b/third_party/immer/extra/fuzzer/map-gc.cpp @@ -0,0 +1,93 @@ +// +// immer: immutable data structures for C++ +// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente +// +// This software is distributed under the Boost Software License, Version 1.0. +// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt +// + +#include "fuzzer_input.hpp" + +#include <immer/heap/gc_heap.hpp> +#include <immer/map.hpp> +#include <immer/refcount/no_refcount_policy.hpp> + +#include <array> + +using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>, + immer::no_refcount_policy, + immer::gc_transience_policy, + false>; + +extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data, + std::size_t size) +{ + constexpr auto var_count = 4; + + using map_t = + immer::map<char, int, std::hash<char>, std::equal_to<char>, gc_memory>; + + auto vars = std::array<map_t, var_count>{}; + + auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; }; + + return fuzzer_input{data, size}.run([&](auto& in) { + enum ops + { + op_set, + op_erase, + op_set_move, + op_erase_move, + op_iterate, + op_find, + op_update + }; + auto src = read<char>(in, is_valid_var); + auto dst = read<char>(in, is_valid_var); + switch (read<char>(in)) { + case op_set: { + auto value = read<size_t>(in); + vars[dst] = vars[src].set(value, 42); + break; + } + case op_erase: { + auto value = read<size_t>(in); + vars[dst] = vars[src].erase(value); + break; + } + case op_set_move: { + auto value = read<size_t>(in); + vars[dst] = std::move(vars[src]).set(value, 42); + break; + } + case op_erase_move: { + auto value = read<size_t>(in); + vars[dst] = std::move(vars[src]).erase(value); + break; + } + case op_iterate: { + auto srcv = vars[src]; + for (const auto& v : srcv) { + vars[dst] = vars[dst].set(v.first, v.second); + } + break; + } + case op_find: { + auto value = read<size_t>(in); + auto res = vars[src].find(value); + if (res != nullptr) { + vars[dst] = vars[dst].set(*res, 42); + } + break; + } + case op_update: { + auto key = read<size_t>(in); + vars[dst] = vars[src].update(key, [](int x) { return x + 1; }); + break; + } + default: + break; + }; + return true; + }); +} |