Coverage Report

Created: 2025-05-14 12:32

next uncovered line (L), next uncovered region (R), next uncovered branch (B)
/root/bitcoin/src/test/fuzz/buffered_file.cpp
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// Copyright (c) 2020-2022 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 <span.h>
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#include <streams.h>
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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 <array>
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#include <cstddef>
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#include <cstdint>
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#include <iostream>
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#include <optional>
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#include <vector>
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FUZZ_TARGET(buffered_file)
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{
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    FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
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    FuzzedFileProvider fuzzed_file_provider{fuzzed_data_provider};
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    std::optional<BufferedFile> opt_buffered_file;
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    AutoFile fuzzed_file{
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        fuzzed_file_provider.open(),
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        ConsumeRandomLengthByteVector<std::byte>(fuzzed_data_provider),
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    };
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    try {
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        auto n_buf_size = fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096);
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        auto n_rewind_in = fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096);
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        opt_buffered_file.emplace(fuzzed_file, n_buf_size, n_rewind_in);
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    } catch (const std::ios_base::failure&) {
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    }
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    if (opt_buffered_file && !fuzzed_file.IsNull()) {
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        bool setpos_fail = false;
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        LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100)
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        {
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            CallOneOf(
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                fuzzed_data_provider,
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                [&] {
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                    std::array<std::byte, 4096> arr{};
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                    try {
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                        opt_buffered_file->read({arr.data(), fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096)});
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                    } catch (const std::ios_base::failure&) {
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                    }
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                },
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                [&] {
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                    opt_buffered_file->SetLimit(fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096));
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                },
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                [&] {
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                    if (!opt_buffered_file->SetPos(fuzzed_data_provider.ConsumeIntegralInRange<uint64_t>(0, 4096))) {
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                        setpos_fail = true;
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                    }
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                },
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                [&] {
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                    if (setpos_fail) {
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                        // Calling FindByte(...) after a failed SetPos(...) call may result in an infinite loop.
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                        return;
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                    }
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                    try {
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                        opt_buffered_file->FindByte(std::byte(fuzzed_data_provider.ConsumeIntegral<uint8_t>()));
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                    } catch (const std::ios_base::failure&) {
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                    }
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                },
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                [&] {
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                    ReadFromStream(fuzzed_data_provider, *opt_buffered_file);
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                });
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        }
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        opt_buffered_file->GetPos();
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    }
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}