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713314abfa
Previously, the {Basic,}TestingSetup for fuzzers were set up in many ways:
1. Calling InitializeFuzzingContext, which implicitly constructs a static
const BasicTestingSetup
2. Directly constructing a static const BasicTestingSetup in the initialize_*
function
3. Directly constructing a static TestingSetup and reproducing the
initialization arguments (I'm assuming because
InitializeFuzzingContext only initializes a BasicTestingSetup)
The new, relatively-simple MakeFuzzingContext function allows us to
consolidate these methods of initialization by being flexible enough to
be used in all situations. It:
1. Is templated so that we can choose to initialize any of
the *TestingSetup classes
2. Has sane defaults which are often used in fuzzers but are also
easily overridable
3. Returns a unique_ptr, explicitly transferring ownership to the caller
to deal with according to its situation
84 lines
3.0 KiB
C++
84 lines
3.0 KiB
C++
// Copyright (c) 2020 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 <consensus/consensus.h>
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#include <net.h>
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#include <net_processing.h>
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#include <protocol.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 <test/util/mining.h>
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#include <test/util/net.h>
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#include <test/util/setup_common.h>
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#include <test/util/validation.h>
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#include <util/memory.h>
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#include <validation.h>
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#include <validationinterface.h>
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namespace {
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const TestingSetup* g_setup;
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} // namespace
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void initialize_process_messages()
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{
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static const auto testing_setup = MakeFuzzingContext<const TestingSetup>();
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g_setup = testing_setup.get();
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for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
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MineBlock(g_setup->m_node, CScript() << OP_TRUE);
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}
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SyncWithValidationInterfaceQueue();
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}
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FUZZ_TARGET_INIT(process_messages, initialize_process_messages)
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{
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FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
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ConnmanTestMsg& connman = *(ConnmanTestMsg*)g_setup->m_node.connman.get();
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TestChainState& chainstate = *(TestChainState*)&g_setup->m_node.chainman->ActiveChainstate();
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chainstate.ResetIbd();
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std::vector<CNode*> peers;
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bool jump_out_of_ibd{false};
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const auto num_peers_to_add = fuzzed_data_provider.ConsumeIntegralInRange(1, 3);
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for (int i = 0; i < num_peers_to_add; ++i) {
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peers.push_back(ConsumeNodeAsUniquePtr(fuzzed_data_provider, i).release());
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CNode& p2p_node = *peers.back();
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FillNode(fuzzed_data_provider, p2p_node);
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p2p_node.fSuccessfullyConnected = true;
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p2p_node.fPauseSend = false;
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g_setup->m_node.peerman->InitializeNode(&p2p_node);
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connman.AddTestNode(p2p_node);
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}
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while (fuzzed_data_provider.ConsumeBool()) {
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if (!jump_out_of_ibd) jump_out_of_ibd = fuzzed_data_provider.ConsumeBool();
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if (jump_out_of_ibd && chainstate.IsInitialBlockDownload()) chainstate.JumpOutOfIbd();
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const std::string random_message_type{fuzzed_data_provider.ConsumeBytesAsString(CMessageHeader::COMMAND_SIZE).c_str()};
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CSerializedNetMsg net_msg;
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net_msg.m_type = random_message_type;
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net_msg.data = ConsumeRandomLengthByteVector(fuzzed_data_provider);
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CNode& random_node = *peers.at(fuzzed_data_provider.ConsumeIntegralInRange<int>(0, peers.size() - 1));
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(void)connman.ReceiveMsgFrom(random_node, net_msg);
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random_node.fPauseSend = false;
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try {
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connman.ProcessMessagesOnce(random_node);
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} catch (const std::ios_base::failure&) {
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}
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{
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LOCK(random_node.cs_sendProcessing);
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g_setup->m_node.peerman->SendMessages(&random_node);
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}
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}
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SyncWithValidationInterfaceQueue();
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LOCK2(::cs_main, g_cs_orphans); // See init.cpp for rationale for implicit locking order requirement
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g_setup->m_node.connman->StopNodes();
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}
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