105 lines
3.2 KiB
C++
105 lines
3.2 KiB
C++
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//
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// immer: immutable data structures for C++
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// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
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//
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// This software is distributed under the Boost Software License, Version 1.0.
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// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
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//
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#include "fuzzer_input.hpp"
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#include <immer/heap/gc_heap.hpp>
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#include <immer/refcount/no_refcount_policy.hpp>
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#include <immer/vector.hpp>
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#include <immer/vector_transient.hpp>
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#include <array>
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using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
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immer::no_refcount_policy,
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immer::gc_transience_policy,
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false>;
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extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
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std::size_t size)
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{
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constexpr auto var_count = 4;
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constexpr auto bits = 2;
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using vector_t = immer::vector<int, gc_memory, bits, bits>;
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using transient_t = typename vector_t::transient_type;
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using size_t = std::uint8_t;
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auto vs = std::array<vector_t, var_count>{};
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auto ts = std::array<transient_t, var_count>{};
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auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
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auto is_valid_index = [](auto& v) {
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return [&](auto idx) { return idx >= 0 && idx < v.size(); };
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};
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auto is_valid_size = [](auto& v) {
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return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
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};
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return fuzzer_input{data, size}.run([&](auto& in) {
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enum ops
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{
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op_transient,
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op_persistent,
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op_push_back,
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op_update,
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op_take,
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op_push_back_mut,
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op_update_mut,
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op_take_mut,
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};
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auto dst = read<char>(in, is_valid_var);
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switch (read<char>(in)) {
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case op_transient: {
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auto src = read<char>(in, is_valid_var);
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ts[dst] = vs[src].transient();
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break;
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}
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case op_persistent: {
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auto src = read<char>(in, is_valid_var);
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vs[dst] = ts[src].persistent();
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break;
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}
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case op_push_back: {
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auto src = read<char>(in, is_valid_var);
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vs[dst] = vs[src].push_back(42);
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break;
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}
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case op_update: {
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auto src = read<char>(in, is_valid_var);
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auto idx = read<size_t>(in, is_valid_index(vs[src]));
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vs[dst] = vs[src].update(idx, [](auto x) { return x + 1; });
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break;
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}
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case op_take: {
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auto src = read<char>(in, is_valid_var);
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auto idx = read<size_t>(in, is_valid_size(vs[src]));
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vs[dst] = vs[src].take(idx);
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break;
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}
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case op_push_back_mut: {
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ts[dst].push_back(13);
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break;
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}
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case op_update_mut: {
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auto idx = read<size_t>(in, is_valid_index(ts[dst]));
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ts[dst].update(idx, [](auto x) { return x + 1; });
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break;
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}
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case op_take_mut: {
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auto idx = read<size_t>(in, is_valid_size(ts[dst]));
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ts[dst].take(idx);
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break;
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}
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default:
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break;
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};
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return true;
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});
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}
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