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fuzz: refactor: scope fake clocks to target phases

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Avoid exposing a process-wide FakeNodeClock accessor from the test
utility module. Initialize separate scoped clocks for target setup and
input processing, and pass the active clock to ResetChainmanAndMempool
by reference.

ResetChainmanAndMempool sets each scoped clock to the selected chain's
genesis time. Avoid hard-coding the mainnet genesis timestamp when
constructing these clocks, because the targets use REGTEST parameters
and the value is overwritten during reset.

Initialize each clock from the fuzz harness's existing mock time until
ResetChainmanAndMempool sets the REGTEST genesis time.

This commit does not change behavior.

Co-authored-by: maflcko <6399679+maflcko@users.noreply.github.com>
Co-authored-by: nervana21 <205626986+nervana21@users.noreply.github.com>
This commit is contained in:
Hao Xu
2026-08-11 19:29:36 +08:00
parent e33410d888
commit 4e5327bc98
7 changed files with 22 additions and 24 deletions
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9
src/test/fuzz/process_message.cpp
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@@ -48,6 +48,7 @@ extern void MakeRandDeterministicDANGEROUS(const uint256& seed) noexcept;
void initialize_process_message()
{
FakeNodeClock init_clock{}; // Uses the existing mock time
if (const auto val{std::getenv("LIMIT_TO_MESSAGE_TYPE")}) {
LIMIT_TO_MESSAGE_TYPE = val;
Assert(std::count(ALL_NET_MESSAGE_TYPES.begin(), ALL_NET_MESSAGE_TYPES.end(), LIMIT_TO_MESSAGE_TYPE)); // Unknown message type passed
@@ -59,7 +60,7 @@ void initialize_process_message()
{}),
};
g_setup = testing_setup.get();
ResetChainmanAndMempool(*g_setup);
ResetChainmanAndMempool(*g_setup, init_clock);
}
FUZZ_TARGET(process_message, .init = initialize_process_message)
@@ -73,7 +74,7 @@ FUZZ_TARGET(process_message, .init = initialize_process_message)
auto& chainman{static_cast<TestChainstateManager&>(*node.chainman)};
const auto block_index_size{WITH_LOCK(chainman.GetMutex(), return chainman.BlockIndex().size())};
const auto initial_sequence{WITH_LOCK(node.mempool->cs, return node.mempool->GetSequence())};
GetFakeNodeClock().set(1610000000s); // 2021-01-07, arbitrary
FakeNodeClock node_clock{1610000000s}; // 2021-01-07, arbitrary
FakeSteadyClock steady_clock;
chainman.ResetIbd();
chainman.DisableNextWrite();
@@ -107,7 +108,7 @@ FUZZ_TARGET(process_message, .init = initialize_process_message)
connman.AddTestNode(p2p_node);
FillNode(fuzzed_data_provider, connman, p2p_node);
GetFakeNodeClock().set(ConsumeTime(fuzzed_data_provider));
node_clock.set(ConsumeTime(fuzzed_data_provider));
CSerializedNetMsg net_msg;
net_msg.m_type = random_message_type;
@@ -136,6 +137,6 @@ FUZZ_TARGET(process_message, .init = initialize_process_message)
if (block_index_size != WITH_LOCK(chainman.GetMutex(), return chainman.BlockIndex().size()) || initial_sequence != end_sequence) {
// Reuse the global chainman and mempool, but reset them when dirty.
MakeRandDeterministicDANGEROUS(uint256::ZERO);
ResetChainmanAndMempool(*g_setup);
ResetChainmanAndMempool(*g_setup, node_clock);
}
}