| 22 | false>; |
| 23 | |
| 24 | extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data, |
| 25 | std::size_t size) |
| 26 | { |
| 27 | constexpr auto var_count = 4; |
| 28 | |
| 29 | auto guard = immer::gc_disable_guard{}; |
| 30 | |
| 31 | using array_t = immer::array<int, gc_memory>; |
| 32 | using transient_t = typename array_t::transient_type; |
| 33 | using size_t = std::uint8_t; |
| 34 | |
| 35 | auto vs = std::array<array_t, var_count>{}; |
| 36 | auto ts = std::array<transient_t, var_count>{}; |
| 37 | |
| 38 | auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; }; |
| 39 | auto is_valid_index = [](auto& v) { |
| 40 | return [&](auto idx) { return idx >= 0 && idx < v.size(); }; |
| 41 | }; |
| 42 | auto is_valid_size = [](auto& v) { |
| 43 | return [&](auto idx) { return idx >= 0 && idx <= v.size(); }; |
| 44 | }; |
| 45 | // limit doing immutable pushes on vectors that are too big already to |
| 46 | // prevent timeouts |
| 47 | auto too_big = [](auto&& v) { return v.size() > (std::size_t{1} << 10); }; |
| 48 | return fuzzer_input{data, size}.run([&](auto& in) { |
| 49 | enum ops |
| 50 | { |
| 51 | op_transient, |
| 52 | op_persistent, |
| 53 | op_push_back, |
| 54 | op_update, |
| 55 | op_take, |
| 56 | op_push_back_mut, |
| 57 | op_update_mut, |
| 58 | op_take_mut, |
| 59 | }; |
| 60 | auto dst = read<char>(in, is_valid_var); |
| 61 | switch (read<char>(in)) { |
| 62 | case op_transient: { |
| 63 | auto src = read<char>(in, is_valid_var); |
| 64 | ts[dst] = vs[src].transient(); |
| 65 | break; |
| 66 | } |
| 67 | case op_persistent: { |
| 68 | auto src = read<char>(in, is_valid_var); |
| 69 | vs[dst] = ts[src].persistent(); |
| 70 | break; |
| 71 | } |
| 72 | case op_push_back: { |
| 73 | auto src = read<char>(in, is_valid_var); |
| 74 | if (!too_big(vs[src])) |
| 75 | vs[dst] = vs[src].push_back(42); |
| 76 | break; |
| 77 | } |
| 78 | case op_update: { |
| 79 | auto src = read<char>(in, is_valid_var); |
| 80 | auto idx = read<size_t>(in, is_valid_index(vs[src])); |
| 81 | vs[dst] = vs[src].update(idx, [](auto x) { return x + 1; }); |