Function FUZZ_TARGET_INIT

src/test/fuzz/process_messages.cpp:34–90

}

FUZZ_TARGET_INIT(process_messages, initialize_process_messages)
{
    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

    ConnmanTestMsg& connman = *static_cast<ConnmanTestMsg*>(g_setup->m_node.connman.get());
    TestChainState& chainstate = *static_cast<TestChainState*>(&g_setup->m_node.chainman->ActiveChainstate());
    SetMockTime(1610000000); // any time to successfully reset ibd
    chainstate.ResetIbd();

    std::vector<CNode*> peers;
    const auto num_peers_to_add = fuzzed_data_provider.ConsumeIntegralInRange(1, 3);
    for (int i = 0; i < num_peers_to_add; ++i) {
        peers.push_back(ConsumeNodeAsUniquePtr(fuzzed_data_provider, i).release());
        CNode& p2p_node = *peers.back();

        g_setup->m_node.peerman->InitializeNode(&p2p_node);
        FillNode(fuzzed_data_provider, connman, *g_setup->m_node.peerman, p2p_node);

        connman.AddTestNode(p2p_node);
    }

    LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 100) {
        // ELEMENTS: this loop runs on a single core and achieves nothing that couldn't
        //  be achieved by just repeating the fuzz runs. It typically takes around 11
        //  minutes on Bitcoin and around 60 minutes on Elements (presumably because the
        //  seed vectors aren't valid Elements messages so the fuzzer gets lost and starts
        //  adding tons of iterations).
        //
        // Capping to 100 iterations reduces the run time to 4-5 minutes on both Bitcoin
        //  and Elements.

        const std::string random_message_type{fuzzed_data_provider.ConsumeBytesAsString(CMessageHeader::COMMAND_SIZE).c_str()};

        const auto mock_time = ConsumeTime(fuzzed_data_provider);
        SetMockTime(mock_time);

        CSerializedNetMsg net_msg;
        net_msg.m_type = random_message_type;
        net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider);

        CNode& random_node = *PickValue(fuzzed_data_provider, peers);

        (void)connman.ReceiveMsgFrom(random_node, net_msg);
        random_node.fPauseSend = false;

        try {
            connman.ProcessMessagesOnce(random_node);
        } catch (const std::ios_base::failure&) {
        }
        {
            LOCK(random_node.cs_sendProcessing);
            g_setup->m_node.peerman->SendMessages(&random_node);
        }
    }
    SyncWithValidationInterfaceQueue();
    g_setup->m_node.connman->StopNodes();
}