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137 lines
3.2 KiB
C++
137 lines
3.2 KiB
C++
// Copyright (c) 2019, Paul Dreik
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// For the license information refer to format.h.
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#include <fmt/chrono.h>
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#include <cstdint>
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#include "fuzzer-common.h"
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template <typename Period, typename Rep>
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void invoke_inner(fmt::string_view format_str, Rep rep) {
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auto value = std::chrono::duration<Rep, Period>(rep);
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try {
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#if FMT_FUZZ_FORMAT_TO_STRING
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std::string message = fmt::format(format_str, value);
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#else
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auto buf = fmt::memory_buffer();
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fmt::format_to(std::back_inserter(buf), format_str, value);
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#endif
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} catch (std::exception&) {
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}
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}
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// Rep is a duration's representation type.
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template <typename Rep>
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void invoke_outer(const uint8_t* data, size_t size, int period) {
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// Always use a fixed location of the data.
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static_assert(sizeof(Rep) <= fixed_size, "fixed size is too small");
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if (size <= fixed_size + 1) return;
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const Rep rep = assign_from_buf<Rep>(data);
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data += fixed_size;
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size -= fixed_size;
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// data is already allocated separately in libFuzzer so reading past the end
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// will most likely be detected anyway.
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const auto format_str = fmt::string_view(as_chars(data), size);
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// yocto, zepto, zetta and yotta are not handled.
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switch (period) {
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case 1:
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invoke_inner<std::atto>(format_str, rep);
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break;
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case 2:
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invoke_inner<std::femto>(format_str, rep);
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break;
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case 3:
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invoke_inner<std::pico>(format_str, rep);
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break;
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case 4:
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invoke_inner<std::nano>(format_str, rep);
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break;
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case 5:
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invoke_inner<std::micro>(format_str, rep);
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break;
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case 6:
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invoke_inner<std::milli>(format_str, rep);
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break;
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case 7:
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invoke_inner<std::centi>(format_str, rep);
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break;
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case 8:
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invoke_inner<std::deci>(format_str, rep);
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break;
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case 9:
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invoke_inner<std::deca>(format_str, rep);
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break;
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case 10:
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invoke_inner<std::kilo>(format_str, rep);
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break;
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case 11:
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invoke_inner<std::mega>(format_str, rep);
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break;
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case 12:
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invoke_inner<std::giga>(format_str, rep);
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break;
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case 13:
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invoke_inner<std::tera>(format_str, rep);
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break;
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case 14:
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invoke_inner<std::peta>(format_str, rep);
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break;
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case 15:
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invoke_inner<std::exa>(format_str, rep);
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break;
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}
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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) return 0;
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const auto representation = data[0];
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const auto period = 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, period);
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break;
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case 2:
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invoke_outer<signed char>(data, size, period);
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break;
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case 3:
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invoke_outer<unsigned char>(data, size, period);
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break;
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case 4:
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invoke_outer<short>(data, size, period);
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break;
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case 5:
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invoke_outer<unsigned short>(data, size, period);
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break;
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case 6:
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invoke_outer<int>(data, size, period);
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break;
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case 7:
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invoke_outer<unsigned int>(data, size, period);
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break;
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case 8:
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invoke_outer<long>(data, size, period);
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break;
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case 9:
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invoke_outer<unsigned long>(data, size, period);
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break;
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case 10:
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invoke_outer<float>(data, size, period);
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break;
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case 11:
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invoke_outer<double>(data, size, period);
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break;
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case 12:
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invoke_outer<long double>(data, size, period);
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break;
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}
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return 0;
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}
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