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//
// 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/flex_vector.hpp>
#include <immer/flex_vector_transient.hpp>
#include <immer/heap/gc_heap.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;
constexpr auto bits = 2;
using vector_t = immer::flex_vector<int, gc_memory, bits, bits>;
using transient_t = typename vector_t::transient_type;
using size_t = std::uint8_t;
auto vs = std::array<vector_t, var_count>{};
auto ts = std::array<transient_t, var_count>{};
auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
auto is_valid_var_neq = [](auto other) {
return [=](auto idx) {
return idx >= 0 && idx < var_count && idx != other;
};
};
auto is_valid_index = [](auto& v) {
return [&](auto idx) { return idx >= 0 && idx < v.size(); };
};
auto is_valid_size = [](auto& v) {
return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
};
auto can_concat = [](auto&& v1, auto&& v2) {
using size_type = decltype(v1.size());
auto max = std::numeric_limits<size_type>::max() >> (bits * 4);
return v1.size() < max && v2.size() < max;
};
return fuzzer_input{data, size}.run([&](auto& in) {
enum ops
{
op_transient,
op_persistent,
op_push_back,
op_update,
op_take,
op_drop,
op_concat,
op_push_back_mut,
op_update_mut,
op_take_mut,
op_drop_mut,
op_prepend_mut,
op_prepend_mut_move,
op_append_mut,
op_append_mut_move,
};
auto dst = read<char>(in, is_valid_var);
switch (read<char>(in)) {
case op_transient: {
auto src = read<char>(in, is_valid_var);
ts[dst] = vs[src].transient();
break;
}
case op_persistent: {
auto src = read<char>(in, is_valid_var);
vs[dst] = ts[src].persistent();
break;
}
case op_push_back: {
auto src = read<char>(in, is_valid_var);
vs[dst] = vs[src].push_back(42);
break;
}
case op_update: {
auto src = read<char>(in, is_valid_var);
auto idx = read<size_t>(in, is_valid_index(vs[src]));
vs[dst] = vs[src].update(idx, [](auto x) { return x + 1; });
break;
}
case op_take: {
auto src = read<char>(in, is_valid_var);
auto idx = read<size_t>(in, is_valid_size(vs[src]));
vs[dst] = vs[src].take(idx);
break;
}
case op_drop: {
auto src = read<char>(in, is_valid_var);
auto idx = read<size_t>(in, is_valid_size(vs[src]));
vs[dst] = vs[src].drop(idx);
break;
}
case op_concat: {
auto src = read<char>(in, is_valid_var);
auto src2 = read<char>(in, is_valid_var);
if (can_concat(vs[src], vs[src2]))
vs[dst] = vs[src] + vs[src2];
break;
}
case op_push_back_mut: {
ts[dst].push_back(13);
break;
}
case op_update_mut: {
auto idx = read<size_t>(in, is_valid_index(ts[dst]));
ts[dst].update(idx, [](auto x) { return x + 1; });
break;
}
case op_take_mut: {
auto idx = read<size_t>(in, is_valid_size(ts[dst]));
ts[dst].take(idx);
break;
}
case op_prepend_mut: {
auto src = read<char>(in, is_valid_var_neq(dst));
if (can_concat(ts[dst], ts[src]))
ts[dst].prepend(ts[src]);
break;
}
case op_prepend_mut_move: {
auto src = read<char>(in, is_valid_var_neq(dst));
if (can_concat(ts[dst], ts[src])) {
ts[dst].prepend(std::move(ts[src]));
ts[src] = {};
}
break;
}
case op_append_mut: {
auto src = read<char>(in, is_valid_var_neq(dst));
if (can_concat(ts[dst], ts[src]))
ts[dst].append(ts[src]);
break;
}
case op_append_mut_move: {
auto src = read<char>(in, is_valid_var_neq(dst));
if (can_concat(ts[dst], ts[src])) {
ts[dst].append(std::move(ts[src]));
ts[src] = {};
}
break;
}
default:
break;
};
return true;
});
}
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