Coverage Report

Created: 2025-02-21 14:37

/root/bitcoin/src/test/fuzz/strprintf.cpp
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Source (jump to first uncovered line)
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// Copyright (c) 2020-2021 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <test/fuzz/FuzzedDataProvider.h>
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#include <test/fuzz/fuzz.h>
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#include <test/fuzz/util.h>
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#include <tinyformat.h>
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#include <util/strencodings.h>
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#include <util/translation.h>
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#include <algorithm>
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#include <cstdint>
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#include <string>
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#include <vector>
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template <typename... Args>
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void fuzz_fmt(const std::string& fmt, const Args&... args)
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{
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    (void)tfm::format(tfm::RuntimeFormat{fmt}, args...);
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}
Unexecuted instantiation: _Z8fuzz_fmtIJNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEEvRKS5_DpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJPKcEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJaEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJhEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJcEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJbEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJfEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJdEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJsEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJtEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJiEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJjEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJlEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
Unexecuted instantiation: _Z8fuzz_fmtIJmEEvRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEDpRKT_
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FUZZ_TARGET(str_printf)
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{
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    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
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    const std::string format_string = fuzzed_data_provider.ConsumeRandomLengthString(64);
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    const int digits_in_format_specifier = std::count_if(format_string.begin(), format_string.end(), IsDigit);
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    // Avoid triggering the following crash bug:
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    // * strprintf("%987654321000000:", 1);
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    //
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    // Avoid triggering the following OOM bug:
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    // * strprintf("%.222222200000000$", 1.1);
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    //
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    // Upstream bug report: https://github.com/c42f/tinyformat/issues/70
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    if (format_string.find('%') != std::string::npos && digits_in_format_specifier >= 7) {
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        return;
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    }
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    // Avoid triggering the following crash bug:
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    // * strprintf("%1$*1$*", -11111111);
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    //
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    // Upstream bug report: https://github.com/c42f/tinyformat/issues/70
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    if (format_string.find('%') != std::string::npos && format_string.find('$') != std::string::npos && format_string.find('*') != std::string::npos && digits_in_format_specifier > 0) {
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        return;
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    }
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    // Avoid triggering the following crash bug:
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    // * strprintf("%.1s", (char*)nullptr);
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    //
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    // (void)strprintf(format_string, (char*)nullptr);
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    //
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    // Upstream bug report: https://github.com/c42f/tinyformat/issues/70
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    try {
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        CallOneOf(
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            fuzzed_data_provider,
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeRandomLengthString(32));
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeRandomLengthString(32).c_str());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<signed char>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<unsigned char>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<char>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeBool());
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            });
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    } catch (const tinyformat::format_error&) {
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    }
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    if (format_string.find('%') != std::string::npos && format_string.find('c') != std::string::npos) {
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        // Avoid triggering the following:
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        // * strprintf("%c", 1.31783e+38);
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        // tinyformat.h:244:36: runtime error: 1.31783e+38 is outside the range of representable values of type 'char'
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        return;
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    }
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    if (format_string.find('%') != std::string::npos && format_string.find('*') != std::string::npos) {
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        // Avoid triggering the following:
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        // * strprintf("%*", -2.33527e+38);
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        // tinyformat.h:283:65: runtime error: -2.33527e+38 is outside the range of representable values of type 'int'
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        // * strprintf("%*", -2147483648);
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        // tinyformat.h:763:25: runtime error: negation of -2147483648 cannot be represented in type 'int'; cast to an unsigned type to negate this value to itself
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        return;
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    }
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    try {
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        CallOneOf(
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            fuzzed_data_provider,
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeFloatingPoint<float>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeFloatingPoint<double>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<int16_t>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<uint16_t>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<int32_t>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<uint32_t>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<int64_t>());
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            },
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            [&] {
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                fuzz_fmt(format_string, fuzzed_data_provider.ConsumeIntegral<uint64_t>());
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            });
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    } catch (const tinyformat::format_error&) {
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    }
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}