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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 "extra/fuzzer/fuzzer_input.hpp"
#include <array>
#include <catch2/catch_test_macros.hpp>
#include <immer/flex_vector.hpp>
#include <iostream>
#define IMMER_FUZZED_TRACE_ENABLE 0
#if IMMER_FUZZED_TRACE_ENABLE
#define IMMER_FUZZED_TRACE(...) std::cout << __VA_ARGS__ << std::endl;
#else
#define IMMER_FUZZED_TRACE(...)
#endif
namespace {
template <std::size_t VarCount = 2, unsigned Bits = 2>
int run_input(const std::uint8_t* data, std::size_t size)
{
using vector_t =
immer::flex_vector<int, immer::default_memory_policy, Bits, Bits>;
using size_t = std::uint8_t;
auto vars = std::array<vector_t, VarCount>{};
#if IMMER_FUZZED_TRACE_ENABLE
std::cout << "/// new test run" << std::endl;
for (auto i = 0u; i < VarCount; ++i)
std::cout << "auto var" << i << " = vector_t{};" << std::endl;
#endif
auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < VarCount; };
auto is_valid_var_neq = [](auto other) {
return [=](auto idx) {
return idx >= 0 && idx < VarCount && 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());
return v2.size() < (std::numeric_limits<size_type>::max() - v1.size());
};
auto can_insert = [](auto&& v1) {
using size_type = decltype(v1.size());
return v1.size() < std::numeric_limits<size_type>::max();
};
return fuzzer_input{data, size}.run([&](auto& in) {
enum ops
{
op_push_back,
op_update,
op_take,
op_drop,
op_concat,
op_push_back_move,
op_update_move,
op_take_move,
op_drop_move,
op_concat_move_l,
op_concat_move_r,
op_concat_move_lr,
};
auto src = read<std::uint8_t>(in, is_valid_var);
auto dst = read<std::uint8_t>(in, is_valid_var);
switch (read<char>(in)) {
case op_push_back:
if (can_insert(vars[src])) {
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src
<< ".push_back(42);");
vars[dst] = vars[src].push_back(42);
}
break;
case op_update: {
auto idx = read<size_t>(in, is_valid_index(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".update("
<< +idx
<< ", [] (auto x) { return x + 1; });");
vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
break;
}
case op_take: {
auto idx = read<size_t>(in, is_valid_size(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".take("
<< +idx << ");");
vars[dst] = vars[src].take(idx);
break;
}
case op_drop: {
auto idx = read<size_t>(in, is_valid_size(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << ".take("
<< +idx << ");");
vars[dst] = vars[src].drop(idx);
break;
}
case op_concat: {
auto src2 = read<std::uint8_t>(in, is_valid_var);
if (can_concat(vars[src], vars[src2])) {
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src << " + var"
<< +src2 << ";");
vars[dst] = vars[src] + vars[src2];
}
break;
}
case op_push_back_move: {
if (can_insert(vars[src])) {
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ").push_back(21);");
vars[dst] = std::move(vars[src]).push_back(21);
}
break;
}
case op_update_move: {
auto idx = read<size_t>(in, is_valid_index(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ").update(" << +idx
<< ", [] (auto x) { return x + 1; });");
vars[dst] =
std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
break;
}
case op_take_move: {
auto idx = read<size_t>(in, is_valid_size(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ").take(" << +idx << ");");
vars[dst] = std::move(vars[src]).take(idx);
break;
}
case op_drop_move: {
auto idx = read<size_t>(in, is_valid_size(vars[src]));
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ").drop(" << +idx << ");");
vars[dst] = std::move(vars[src]).drop(idx);
break;
}
case op_concat_move_l: {
auto src2 = read<std::uint8_t>(in, is_valid_var_neq(src));
if (can_concat(vars[src], vars[src2])) {
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ") + var" << +src2 << ";");
vars[dst] = std::move(vars[src]) + vars[src2];
}
break;
}
case op_concat_move_r: {
auto src2 = read<std::uint8_t>(in, is_valid_var_neq(src));
if (can_concat(vars[src], vars[src2])) {
IMMER_FUZZED_TRACE("var" << +dst << " = var" << +src
<< " + std::move(var" << +src2
<< ");");
vars[dst] = vars[src] + std::move(vars[src2]);
}
break;
}
case op_concat_move_lr: {
auto src2 = read<std::uint8_t>(in, is_valid_var_neq(src));
if (can_concat(vars[src], vars[src2])) {
IMMER_FUZZED_TRACE("var" << +dst << " = std::move(var" << +src
<< ") + std::move(var" << +src2
<< ");");
vars[dst] = std::move(vars[src]) + std::move(vars[src2]);
}
break;
}
default:
break;
};
return true;
});
}
} // namespace
TEST_CASE("bug: concat with moving the right side")
{
// This was a stupid bug on the concatenation of small vectors
// when moving one of the sides.
SECTION("simplified")
{
using vector_t =
immer::flex_vector<int, immer::default_memory_policy, 2, 2>;
auto var0 = vector_t{};
auto var1 = vector_t{};
var0 = var0.push_back(42);
var0 = var0.push_back(42);
var0 = var0.push_back(42);
var1 = var0.push_back(42);
var0 = var0 + var0;
var0 = var0.push_back(42);
var0 = var0 + var1;
var0 = var0 + var0;
var0 = var0 + std::move(var1);
}
#ifndef IMMER_DISABLE_FUZZER_DUE_TO_GCC_BUG
SECTION("vm")
{
constexpr std::uint8_t input[] = {
0x0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0,
0x0, 0x0, 0x0, 0x1, 0x0, 0x40, 0x28, 0x0, 0x4, 0x3f,
0x20, 0x0, 0x0, 0x4, 0x3f, 0x8, 0x0, 0x0, 0x0, 0x0,
0x1, 0x0, 0x0, 0x0, 0x4, 0x3f, 0x0, 0x0, 0x40, 0x0,
0x0, 0x0, 0x0, 0x4, 0x3f, 0x1, 0x0, 0x0, 0x4, 0x3f,
0x0, 0x0, 0xff, 0x0, 0xa, 0x1, 0x0, 0xff, 0x0, 0x0,
};
CHECK(run_input(input, sizeof(input)) == 0);
}
#endif
}
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