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Merge bitcoin/bitcoin#22577: Close minor startup race between main and scheduler threads

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703b1e612a Close minor startup race between main and scheduler threads (Larry Ruane)

Pull request description:

  This is a low-priority bug fix. The scheduler thread runs `CheckForStaleTipAndEvictPeers()` every 45 seconds (EXTRA_PEER_CHECK_INTERVAL). If its first run happens before the active chain is set up (`CChain::SetTip()`), `bitcoind` will assert:
  ```
  (...)
  2021-07-28T22:16:49Z init message: Loading block index…
  bitcoind: validation.cpp:4968: CChainState& ChainstateManager::ActiveChainstate() const: Assertion `m_active_chainstate' failed.
  Aborted (core dumped)
  ```
  I ran into this while using the debugger to investigate an unrelated problem. Single-stepping through threads with a debugger can cause the relative thread execution timing to be very different than usual. I don't think any automated tests are needed for this PR. I'll give reproduction steps in the next PR comment.

ACKs for top commit:
  MarcoFalke:
    cr ACK 703b1e612a
  tryphe:
    tested ACK 703b1e612a
  0xB10C:
    ACK 703b1e612a
  glozow:
    code review ACK 703b1e612a - it makes sense to me to start peerman's background tasks here, after `chainstate->LoadChainTip()` and `node.connman->Start()` have been called.

Tree-SHA512: 9316ad768cba3b171f62e2eb400e3790af66c47d1886d7965edb38d9710fc8c8f8e4fb38232811c9346732ce311d39f740c5c2aaf5f6ca390ddc48c51a8d633b
This commit is contained in:
MarcoFalke
2021-08-04 16:37:01 +02:00
parent 3308c61091 703b1e612a
commit 5b2d8661c9
5 changed files with 21 additions and 11 deletions
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8
src/test/denialofservice_tests.cpp
View File

@@ -53,7 +53,7 @@ BOOST_AUTO_TEST_CASE(outbound_slow_chain_eviction)
const CChainParams& chainparams = Params();
auto connman = std::make_unique<CConnman>(0x1337, 0x1337, *m_node.addrman);
auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, nullptr,
*m_node.scheduler, *m_node.chainman, *m_node.mempool, false);
*m_node.chainman, *m_node.mempool, false);
// Mock an outbound peer
CAddress addr1(ip(0xa0b0c001), NODE_NONE);
@@ -121,7 +121,7 @@ BOOST_AUTO_TEST_CASE(stale_tip_peer_management)
const CChainParams& chainparams = Params();
auto connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman);
auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, nullptr,
*m_node.scheduler, *m_node.chainman, *m_node.mempool, false);
*m_node.chainman, *m_node.mempool, false);
constexpr int max_outbound_full_relay = MAX_OUTBOUND_FULL_RELAY_CONNECTIONS;
CConnman::Options options;
@@ -194,7 +194,7 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
auto banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
auto connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman);
auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, banman.get(),
*m_node.scheduler, *m_node.chainman, *m_node.mempool, false);
*m_node.chainman, *m_node.mempool, false);
CNetAddr tor_netaddr;
BOOST_REQUIRE(
@@ -288,7 +288,7 @@ BOOST_AUTO_TEST_CASE(DoS_bantime)
auto banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
auto connman = std::make_unique<CConnman>(0x1337, 0x1337, *m_node.addrman);
auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, banman.get(),
*m_node.scheduler, *m_node.chainman, *m_node.mempool, false);
*m_node.chainman, *m_node.mempool, false);
banman->ClearBanned();
int64_t nStartTime = GetTime();

2
src/test/util/setup_common.cpp
View File

@@ -197,7 +197,7 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
m_node.banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
m_node.connman = std::make_unique<CConnman>(0x1337, 0x1337, *m_node.addrman); // Deterministic randomness for tests.
m_node.peerman = PeerManager::make(chainparams, *m_node.connman, *m_node.addrman,
m_node.banman.get(), *m_node.scheduler, *m_node.chainman,
m_node.banman.get(), *m_node.chainman,
*m_node.mempool, false);
{
CConnman::Options options;