152 lines
3.7 KiB
C++
152 lines
3.7 KiB
C++
// Copyright (c) 2019, Paul Dreik
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// License: see LICENSE.rst in the fmt root directory
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#include <fmt/chrono.h>
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#include <cstdint>
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#include <limits>
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#include <stdexcept>
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#include <type_traits>
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#include <vector>
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#include "fuzzer_common.h"
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template <typename Item, typename Ratio>
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void invoke_inner(fmt::string_view formatstring, const Item item) {
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const std::chrono::duration<Item, Ratio> value(item);
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try {
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#if FMT_FUZZ_FORMAT_TO_STRING
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std::string message = fmt::format(formatstring, value);
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#else
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fmt::memory_buffer buf;
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fmt::format_to(buf, formatstring, value);
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#endif
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} catch (std::exception& /*e*/) {
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}
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}
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// Item is the underlying type for duration (int, long etc)
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template <typename Item>
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void invoke_outer(const uint8_t* Data, size_t Size, const int scaling) {
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// always use a fixed location of the data
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using fmt_fuzzer::Nfixed;
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constexpr auto N = sizeof(Item);
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static_assert(N <= Nfixed, "fixed size is too small");
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if (Size <= Nfixed + 1) {
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return;
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}
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const Item item = fmt_fuzzer::assignFromBuf<Item>(Data);
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// fast forward
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Data += Nfixed;
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Size -= Nfixed;
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// Data is already allocated separately in libFuzzer so reading past
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// the end will most likely be detected anyway
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const auto formatstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
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// doit_impl<Item,std::yocto>(buf.data(),item);
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// doit_impl<Item,std::zepto>(buf.data(),item);
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switch (scaling) {
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case 1:
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invoke_inner<Item, std::atto>(formatstring, item);
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break;
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case 2:
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invoke_inner<Item, std::femto>(formatstring, item);
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break;
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case 3:
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invoke_inner<Item, std::pico>(formatstring, item);
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break;
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case 4:
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invoke_inner<Item, std::nano>(formatstring, item);
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break;
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case 5:
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invoke_inner<Item, std::micro>(formatstring, item);
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break;
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case 6:
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invoke_inner<Item, std::milli>(formatstring, item);
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break;
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case 7:
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invoke_inner<Item, std::centi>(formatstring, item);
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break;
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case 8:
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invoke_inner<Item, std::deci>(formatstring, item);
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break;
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case 9:
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invoke_inner<Item, std::deca>(formatstring, item);
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break;
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case 10:
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invoke_inner<Item, std::kilo>(formatstring, item);
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break;
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case 11:
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invoke_inner<Item, std::mega>(formatstring, item);
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break;
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case 12:
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invoke_inner<Item, std::giga>(formatstring, item);
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break;
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case 13:
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invoke_inner<Item, std::tera>(formatstring, item);
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break;
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case 14:
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invoke_inner<Item, std::peta>(formatstring, item);
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break;
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case 15:
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invoke_inner<Item, std::exa>(formatstring, item);
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}
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// doit_impl<Item,std::zeta>(buf.data(),item);
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// doit_impl<Item,std::yotta>(buf.data(),item);
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size) {
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if (Size <= 4) {
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return 0;
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}
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const auto representation = Data[0];
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const auto scaling = Data[1];
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Data += 2;
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Size -= 2;
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switch (representation) {
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case 1:
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invoke_outer<char>(Data, Size, scaling);
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break;
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case 2:
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invoke_outer<unsigned char>(Data, Size, scaling);
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break;
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case 3:
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invoke_outer<signed char>(Data, Size, scaling);
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break;
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case 4:
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invoke_outer<short>(Data, Size, scaling);
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break;
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case 5:
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invoke_outer<unsigned short>(Data, Size, scaling);
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break;
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case 6:
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invoke_outer<int>(Data, Size, scaling);
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break;
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case 7:
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invoke_outer<unsigned int>(Data, Size, scaling);
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break;
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case 8:
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invoke_outer<long>(Data, Size, scaling);
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break;
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case 9:
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invoke_outer<unsigned long>(Data, Size, scaling);
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break;
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case 10:
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invoke_outer<float>(Data, Size, scaling);
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break;
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case 11:
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invoke_outer<double>(Data, Size, scaling);
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break;
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case 12:
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invoke_outer<long double>(Data, Size, scaling);
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break;
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default:
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break;
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}
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return 0;
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}
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