diff options
| author | fanquake <fanquake@gmail.com> | 2022-12-19 09:34:34 +0000 |
|---|---|---|
| committer | fanquake <fanquake@gmail.com> | 2022-12-19 09:34:39 +0000 |
| commit | 65f5cfda656c150dd0df40369845c53fa387b25f (patch) | |
| tree | b4cd56ffcf6374d88238affa760668d45feb68c1 /src/test/fuzz | |
| parent | bd13d6b36921271bd11f4f207360376903a0fae9 (diff) | |
| parent | 36c201feb74bbb87d22bd956373dbbb9c47fb7e7 (diff) | |
Merge bitcoin/bitcoin#25311: refactor: remove CBlockIndex copy construction
36c201feb74bbb87d22bd956373dbbb9c47fb7e7 remove CBlockIndex copy construction (James O'Beirne)
Pull request description:
Copy construction of CBlockIndex objects is a footgun because of the
wide use of equality-by-pointer comparison in the code base. There are
also potential lifetime confusions of using copied instances, since
there are recursive pointer members (e.g. pprev).
(See also https://github.com/bitcoin/bitcoin/pull/24008#discussion_r891949166)
We can't just delete the copy constructors because they are used for
derived classes (CDiskBlockIndex), so we mark them protected.
ACKs for top commit:
ajtowns:
ACK 36c201feb74bbb87d22bd956373dbbb9c47fb7e7 - code review only
MarcoFalke:
re-ACK 36c201feb74bbb87d22bd956373dbbb9c47fb7e7 🏻
Tree-SHA512: b1cf9a1cb992464a4377dad609713eea63cc099435df374e4553bfe62d362a4eb5e3c6c6649177832f38c0905b23841caf9d62196cef8e3084bfea0bfc26374b
Diffstat (limited to 'src/test/fuzz')
| -rw-r--r-- | src/test/fuzz/pow.cpp | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/test/fuzz/pow.cpp b/src/test/fuzz/pow.cpp index 82fac8b9ee..59eb6df878 100644 --- a/src/test/fuzz/pow.cpp +++ b/src/test/fuzz/pow.cpp @@ -26,7 +26,7 @@ FUZZ_TARGET_INIT(pow, initialize_pow) { FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size()); const Consensus::Params& consensus_params = Params().GetConsensus(); - std::vector<CBlockIndex> blocks; + std::vector<std::unique_ptr<CBlockIndex>> blocks; const uint32_t fixed_time = fuzzed_data_provider.ConsumeIntegral<uint32_t>(); const uint32_t fixed_bits = fuzzed_data_provider.ConsumeIntegral<uint32_t>(); LIMITED_WHILE(fuzzed_data_provider.remaining_bytes() > 0, 10000) { @@ -34,9 +34,10 @@ FUZZ_TARGET_INIT(pow, initialize_pow) if (!block_header) { continue; } - CBlockIndex current_block{*block_header}; + CBlockIndex& current_block{ + *blocks.emplace_back(std::make_unique<CBlockIndex>(*block_header))}; { - CBlockIndex* previous_block = blocks.empty() ? nullptr : &PickValue(fuzzed_data_provider, blocks); + CBlockIndex* previous_block = blocks.empty() ? nullptr : PickValue(fuzzed_data_provider, blocks).get(); const int current_height = (previous_block != nullptr && previous_block->nHeight != std::numeric_limits<int>::max()) ? previous_block->nHeight + 1 : 0; if (fuzzed_data_provider.ConsumeBool()) { current_block.pprev = previous_block; @@ -58,7 +59,6 @@ FUZZ_TARGET_INIT(pow, initialize_pow) } else { current_block.nChainWork = ConsumeArithUInt256(fuzzed_data_provider); } - blocks.push_back(current_block); } { (void)GetBlockProof(current_block); @@ -68,9 +68,9 @@ FUZZ_TARGET_INIT(pow, initialize_pow) } } { - const CBlockIndex* to = &PickValue(fuzzed_data_provider, blocks); - const CBlockIndex* from = &PickValue(fuzzed_data_provider, blocks); - const CBlockIndex* tip = &PickValue(fuzzed_data_provider, blocks); + const auto& to = PickValue(fuzzed_data_provider, blocks); + const auto& from = PickValue(fuzzed_data_provider, blocks); + const auto& tip = PickValue(fuzzed_data_provider, blocks); try { (void)GetBlockProofEquivalentTime(*to, *from, *tip, consensus_params); } catch (const uint_error&) { |