116 lines
2.4 KiB
C++
116 lines
2.4 KiB
C++
// Copyright (c) 2019, Paul Dreik
|
|
// License: see LICENSE.rst in the fmt root directory
|
|
#include <fmt/format.h>
|
|
#include <fmt/printf.h>
|
|
#include <cstdint>
|
|
#include <stdexcept>
|
|
|
|
#include "fuzzer_common.h"
|
|
|
|
using fmt_fuzzer::Nfixed;
|
|
|
|
template <typename Item1, typename Item2>
|
|
void invoke_fmt(const uint8_t* Data, std::size_t Size) {
|
|
constexpr auto N1 = sizeof(Item1);
|
|
constexpr auto N2 = sizeof(Item2);
|
|
static_assert(N1 <= Nfixed, "size1 exceeded");
|
|
static_assert(N2 <= Nfixed, "size2 exceeded");
|
|
if (Size <= Nfixed + Nfixed) {
|
|
return;
|
|
}
|
|
Item1 item1 = fmt_fuzzer::assignFromBuf<Item1>(Data);
|
|
Data += Nfixed;
|
|
Size -= Nfixed;
|
|
|
|
Item2 item2 = fmt_fuzzer::assignFromBuf<Item2>(Data);
|
|
Data += Nfixed;
|
|
Size -= Nfixed;
|
|
|
|
auto fmtstring = fmt::string_view(fmt_fuzzer::as_chars(Data), Size);
|
|
|
|
#if FMT_FUZZ_FORMAT_TO_STRING
|
|
std::string message = fmt::format(fmtstring, item1, item2);
|
|
#else
|
|
fmt::memory_buffer message;
|
|
fmt::format_to(message, fmtstring, item1, item2);
|
|
#endif
|
|
}
|
|
|
|
// for dynamic dispatching to an explicit instantiation
|
|
template <typename Callback> void invoke(int index, Callback callback) {
|
|
switch (index) {
|
|
case 0:
|
|
callback(bool{});
|
|
break;
|
|
case 1:
|
|
callback(char{});
|
|
break;
|
|
case 2:
|
|
using sc = signed char;
|
|
callback(sc{});
|
|
break;
|
|
case 3:
|
|
using uc = unsigned char;
|
|
callback(uc{});
|
|
break;
|
|
case 4:
|
|
callback(short{});
|
|
break;
|
|
case 5:
|
|
using us = unsigned short;
|
|
callback(us{});
|
|
break;
|
|
case 6:
|
|
callback(int{});
|
|
break;
|
|
case 7:
|
|
callback(unsigned{});
|
|
break;
|
|
case 8:
|
|
callback(long{});
|
|
break;
|
|
case 9:
|
|
using ul = unsigned long;
|
|
callback(ul{});
|
|
break;
|
|
case 10:
|
|
callback(float{});
|
|
break;
|
|
case 11:
|
|
callback(double{});
|
|
break;
|
|
case 12:
|
|
using LD = long double;
|
|
callback(LD{});
|
|
break;
|
|
case 13:
|
|
using ptr = void*;
|
|
callback(ptr{});
|
|
break;
|
|
}
|
|
}
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, std::size_t Size) {
|
|
if (Size <= 3) {
|
|
return 0;
|
|
}
|
|
|
|
// switch types depending on the first byte of the input
|
|
const auto first = Data[0] & 0x0F;
|
|
const auto second = (Data[0] & 0xF0) >> 4;
|
|
Data++;
|
|
Size--;
|
|
|
|
auto outer = [=](auto param1) {
|
|
auto inner = [=](auto param2) {
|
|
invoke_fmt<decltype(param1), decltype(param2)>(Data, Size);
|
|
};
|
|
invoke(second, inner);
|
|
};
|
|
|
|
try {
|
|
invoke(first, outer);
|
|
} catch (std::exception& /*e*/) {
|
|
}
|
|
return 0;
|
|
}
|