mirror of
https://github.com/fmtlib/fmt.git
synced 2025-11-04 08:01:40 +01:00
103 lines
2.2 KiB
C++
103 lines
2.2 KiB
C++
// Copyright (c) 2019, Paul Dreik
|
|
// For the license information refer to format.h.
|
|
|
|
#include <fmt/chrono.h>
|
|
|
|
#include <cstdint>
|
|
#include <type_traits>
|
|
#include <vector>
|
|
|
|
#include "fuzzer-common.h"
|
|
|
|
template <typename T>
|
|
void invoke_fmt(const uint8_t* data, size_t size, unsigned arg_name_size) {
|
|
static_assert(sizeof(T) <= fixed_size, "fixed_size too small");
|
|
if (size <= fixed_size) return;
|
|
const T value = assign_from_buf<T>(data);
|
|
data += fixed_size;
|
|
size -= fixed_size;
|
|
|
|
if (arg_name_size <= 0 || arg_name_size >= size) return;
|
|
data_to_string arg_name(data, arg_name_size, true);
|
|
data += arg_name_size;
|
|
size -= arg_name_size;
|
|
|
|
data_to_string format_str(data, size);
|
|
try {
|
|
#if FMT_FUZZ_FORMAT_TO_STRING
|
|
std::string message =
|
|
fmt::format(format_str.get(), fmt::arg(arg_name.data(), value));
|
|
#else
|
|
fmt::memory_buffer out;
|
|
fmt::format_to(std::back_inserter(out), format_str.get(),
|
|
fmt::arg(arg_name.data(), value));
|
|
#endif
|
|
} catch (std::exception&) {
|
|
}
|
|
}
|
|
|
|
// For dynamic dispatching to an explicit instantiation.
|
|
template <typename Callback> void invoke(int type, Callback callback) {
|
|
switch (type) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
|
|
if (size <= 3) return 0;
|
|
|
|
// Switch types depending on the first byte of the input.
|
|
const auto type = data[0] & 0x0F;
|
|
const unsigned arg_name_size = (data[0] & 0xF0) >> 4;
|
|
data++;
|
|
size--;
|
|
|
|
invoke(type, [=](auto arg) {
|
|
invoke_fmt<decltype(arg)>(data, size, arg_name_size);
|
|
});
|
|
return 0;
|
|
}
|