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Diffstat (limited to 'third_party/immer/test/flex_vector/fuzzed-4.cpp')
| -rw-r--r-- | third_party/immer/test/flex_vector/fuzzed-4.cpp | 364 |
1 files changed, 364 insertions, 0 deletions
diff --git a/third_party/immer/test/flex_vector/fuzzed-4.cpp b/third_party/immer/test/flex_vector/fuzzed-4.cpp new file mode 100644 index 000000000000..d9ecdd7fba7f --- /dev/null +++ b/third_party/immer/test/flex_vector/fuzzed-4.cpp @@ -0,0 +1,364 @@ +// +// 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 <catch.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 <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 + +using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>, + immer::no_refcount_policy, + immer::gc_transience_policy, + false>; + +namespace { + +template <std::size_t VarCount = 4, unsigned Bits = 2> +int run_input(const std::uint8_t* data, std::size_t size) +{ + 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, VarCount>{}; + auto ts = std::array<transient_t, VarCount>{}; + +#if IMMER_FUZZED_TRACE_ENABLE + std::cout << "/// new test run" << std::endl; + for (auto i = 0; i < VarCount; ++i) + std::cout << "auto v" << i << " = vector_t{};" << std::endl; + for (auto i = 0; i < VarCount; ++i) + std::cout << "auto t" << i << " = transient_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()); + 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<std::uint8_t>(in, is_valid_var); + switch (read<char>(in)) { + case op_transient: { + auto src = read<std::uint8_t>(in, is_valid_var); + IMMER_FUZZED_TRACE("t" << +dst << " = v" << +src + << ".transient();"); + ts[dst] = vs[src].transient(); + break; + } + case op_persistent: { + auto src = read<std::uint8_t>(in, is_valid_var); + IMMER_FUZZED_TRACE("v" << +dst << " = t" << +src + << ".persistent();"); + vs[dst] = ts[src].persistent(); + break; + } + case op_push_back: { + auto src = read<std::uint8_t>(in, is_valid_var); + IMMER_FUZZED_TRACE("v" << +dst << " = v" << +src + << ".push_back(42);"); + vs[dst] = vs[src].push_back(42); + break; + } + case op_update: { + auto src = read<std::uint8_t>(in, is_valid_var); + auto idx = read<size_t>(in, is_valid_index(vs[src])); + IMMER_FUZZED_TRACE("v" << +dst << " = v" << +src << ".update(" + << +idx + << ", [] (auto x) { return x + 1; });"); + vs[dst] = vs[src].update(idx, [](auto x) { return x + 1; }); + break; + } + case op_take: { + auto src = read<std::uint8_t>(in, is_valid_var); + auto idx = read<size_t>(in, is_valid_size(vs[src])); + IMMER_FUZZED_TRACE("v" << +dst << " = v" << +src << ".take(" << +idx + << ");"); + vs[dst] = vs[src].take(idx); + break; + } + case op_drop: { + auto src = read<std::uint8_t>(in, is_valid_var); + auto idx = read<size_t>(in, is_valid_size(vs[src])); + IMMER_FUZZED_TRACE("v" << +dst << " = v" << +src << ".take(" << +idx + << ");"); + vs[dst] = vs[src].drop(idx); + break; + } + case op_concat: { + auto src = read<std::uint8_t>(in, is_valid_var); + auto src2 = read<std::uint8_t>(in, is_valid_var); + if (can_concat(vs[src], vs[src2])) { + IMMER_FUZZED_TRACE("v" << +dst << " = v" << +src << " + v" + << +src2 << ";"); + vs[dst] = vs[src] + vs[src2]; + } + break; + } + case op_push_back_mut: { + IMMER_FUZZED_TRACE("t" << +dst << ".push_back(13);"); + ts[dst].push_back(13); + break; + } + case op_update_mut: { + auto idx = read<size_t>(in, is_valid_index(ts[dst])); + IMMER_FUZZED_TRACE("t" << +dst << ".update(" << +idx + << ", [] (auto x) { return x + 1; });"); + 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])); + IMMER_FUZZED_TRACE("t" << +dst << ").take(" << +idx << ");"); + ts[dst].take(idx); + break; + } + case op_prepend_mut: { + auto src = read<std::uint8_t>(in, is_valid_var_neq(dst)); + if (can_concat(ts[dst], ts[src])) { + IMMER_FUZZED_TRACE("t" << +dst << ".prepend(t" << +src << ");"); + ts[dst].prepend(ts[src]); + } + break; + } + case op_prepend_mut_move: { + auto src = read<std::uint8_t>(in, is_valid_var_neq(dst)); + if (can_concat(ts[dst], ts[src])) { + IMMER_FUZZED_TRACE("t" << +dst << ".prepend(std::move(t" << +src + << "));" + << " t" << +src << " = {};"); + ts[dst].prepend(std::move(ts[src])); + ts[src] = {}; + } + break; + } + case op_append_mut: { + auto src = read<std::uint8_t>(in, is_valid_var_neq(dst)); + if (can_concat(ts[dst], ts[src])) { + IMMER_FUZZED_TRACE("t" << +dst << ".append(t" << +src << ");"); + ts[dst].append(ts[src]); + } + break; + } + case op_append_mut_move: { + auto src = read<std::uint8_t>(in, is_valid_var_neq(dst)); + if (can_concat(ts[dst], ts[src])) { + IMMER_FUZZED_TRACE("t" << +dst << ".append(std::move(t" << +src + << "));" + << " t" << +src << " = {};"); + ts[dst].append(std::move(ts[src])); + ts[src] = {}; + } + break; + } + default: + break; + }; + return true; + }); +} + +} // namespace + +TEST_CASE("bug: concatenating transients") +{ + // When concatenating two transients vectors the nodes from the + // argument become aliased in the result. As such, we need to + // reset the identitiy of the argument. + SECTION("simplified") + { + using vector_t = immer::flex_vector<int, gc_memory, 2, 2>; + auto t0 = vector_t{}.transient(); + t0.push_back(42); + t0.push_back(42); + t0.push_back(42); + t0.push_back(42); + t0.push_back(42); + t0.push_back(42); + auto t1 = t0; + t1.append(t0); + t1.append(t0); + t0.append(t1); + t1.append(t0); + } + +#if __GNUC__ != 9 + SECTION("") + { + constexpr std::uint8_t input[] = { + 0x2, 0x2, 0x2, 0x2, 0x29, 0x32, 0x0, 0x0, 0x2, 0x2, 0x2, + 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x6, 0x2, + 0x2, 0x2, 0x2, 0x2, 0x6, 0x2, 0x2, 0x2, 0x0, 0x38, 0x2, + 0x0, 0x0, 0x2, 0x2, 0xd, 0x0, 0x0, 0x3b, 0xff, 0x3a, 0x2, + 0xd, 0xd, 0x2, 0x0, 0x0, 0x10, 0xe, 0x0, 0xd, 0x0, 0x0, + 0x2, 0x2, 0xd, 0x0, 0x1, 0x5, + }; + CHECK(run_input(input, sizeof(input)) == 0); + } +#endif +} + +TEST_CASE("bug: concatenating moved transients") +{ + // A moved from concatenated transient is totally smashed, we can + // not do anything with it but reasign... + SECTION("simplified") + { + using vector_t = immer::flex_vector<int, gc_memory, 2, 2>; + using transient_t = typename vector_t::transient_type; + auto v0 = vector_t{}; + auto t0 = transient_t{}; + auto t2 = transient_t{}; + v0 = v0.push_back(42); + t2 = v0.transient(); + v0 = v0 + v0; + v0 = v0 + v0; + v0 = v0 + v0; + v0 = v0 + v0; + t0 = v0.transient(); + t0 = v0.transient(); + t0.append(std::move(t2)); + t2 = {}; + t2.append(std::move(t0)); + } + +#if __GNUC__ != 9 + SECTION("") + { + constexpr std::uint8_t input[] = { + 0x0, 0x2, 0x0, 0x2, 0x0, 0x0, 0x0, 0x6, 0x0, 0x0, 0x0, + 0x6, 0x0, 0x0, 0x0, 0x9d, 0x0, 0x6, 0x0, 0x0, 0x0, 0x6, + 0x0, 0x0, 0x0, 0x9d, 0x28, 0x0, 0x0, 0x0, 0x0, 0x0, 0xf7, + 0xc5, 0x0, 0xa, 0xa, 0x0, 0xfa, 0xe7, 0xff, 0xe7, 0xff, 0x0, + 0xe, 0x2, 0x9, 0x0, 0x28, 0x2, 0xe, 0x0, 0x0, 0x2, 0xd, + 0x0, 0x0, 0x28, 0x0, 0xd, 0x2, 0x5, 0x0, 0x2, + }; + CHECK(run_input(input, sizeof(input)) == 0); + } +#endif + + SECTION("simplified") + { + using vector_t = immer::flex_vector<int, gc_memory, 2, 2>; + using transient_t = typename vector_t::transient_type; + auto v0 = vector_t{}; + auto t0 = transient_t{}; + auto t2 = transient_t{}; + v0 = v0.push_back(42); + v0 = v0.push_back(42); + v0 = v0 + v0; + t0 = v0.transient(); + t2.prepend(std::move(t0)); + t0 = {}; + t0 = v0.transient(); + t0.push_back(13); + t2.append(std::move(t0)); + t0 = {}; + t0 = v0.transient(); + t0.push_back(13); + t2.prepend(std::move(t0)); + t0 = {}; + } + +#if __GNUC__ != 9 + SECTION("") + { + return; + constexpr std::uint8_t input[] = { + 0x0, 0x2, 0x0, 0x0, 0x2, 0xb7, 0x1, 0x36, 0x40, 0x0, 0x0, + 0x0, 0x0, 0xb6, 0x0, 0x2, 0x0, 0x0, 0x6, 0xe, 0x0, 0x0, + 0xfe, 0x0, 0x0, 0xff, 0x0, 0x2, 0xc, 0xff, 0xfc, 0x29, 0x0, + 0x0, 0x0, 0x0, 0x0, 0x7, 0x2, 0xe, 0xff, 0xfc, 0x29, 0x0, + 0x0, 0x0, 0x0, 0x0, 0x7, 0x3, 0x0, 0x0, 0x2, 0xc, 0x2, + 0xc, 0x0, 0xd, 0x0, 0x0, 0x0, 0x0, 0x25, 0x6, + }; + CHECK(run_input(input, sizeof(input)) == 0); + } +#endif +} + +TEST_CASE("bug: aegsdas") +{ + SECTION("simplified") + { + using vector_t = immer::flex_vector<int, gc_memory, 2, 2>; + using transient_t = typename vector_t::transient_type; + auto v2 = vector_t{}; + auto t0 = transient_t{}; + auto t1 = transient_t{}; + v2 = v2.push_back(42); + v2 = v2.push_back(42); + v2 = v2.push_back(42); + v2 = v2.push_back(42); + v2 = v2.push_back(42); + t0 = v2.transient(); + t1.prepend(t0); + t1.prepend(t0); + t1.prepend(t0); + t0.prepend(std::move(t1)); + t1 = {}; + } + +#if __GNUC__ != 9 + SECTION("") + { + constexpr std::uint8_t input[] = { + 0xff, 0xff, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, + 0x82, 0x2, 0x2, 0x2, 0x2, 0x2, 0x2, 0x0, 0x0, 0x3d, 0x0, + 0x0, 0x0, 0x2, 0x84, 0x0, 0x3b, 0x1, 0xb, 0x0, 0xa, 0x1, + 0xb, 0x0, 0x0, 0x3, 0x2, 0x0, 0x3b, 0x1, 0xb, 0x1, 0x0, + 0x0, 0xc, 0xb, 0x1, 0x8, 0xff, 0xff, 0xfc, 0xfd, 0x0, 0x3b, + 0x3, 0x2, 0x0, 0x3b, 0x1, 0x9, 0x1, 0x3b, + }; + CHECK(run_input(input, sizeof(input)) == 0); + } +#endif +} |