diff options
Diffstat (limited to 'src/index/blockfilterindex.cpp')
| -rw-r--r-- | src/index/blockfilterindex.cpp | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/index/blockfilterindex.cpp b/src/index/blockfilterindex.cpp index c3ce8d7af0..7dba115593 100644 --- a/src/index/blockfilterindex.cpp +++ b/src/index/blockfilterindex.cpp @@ -31,6 +31,12 @@ constexpr char DB_FILTER_POS = 'P'; constexpr unsigned int MAX_FLTR_FILE_SIZE = 0x1000000; // 16 MiB /** The pre-allocation chunk size for fltr?????.dat files */ constexpr unsigned int FLTR_FILE_CHUNK_SIZE = 0x100000; // 1 MiB +/** Maximum size of the cfheaders cache + * We have a limit to prevent a bug in filling this cache + * potentially turning into an OOM. At 2000 entries, this cache + * is big enough for a 2,000,000 length block chain, which + * we should be enough until ~2047. */ +constexpr size_t CF_HEADERS_CACHE_MAX_SZ{2000}; namespace { @@ -387,13 +393,32 @@ bool BlockFilterIndex::LookupFilter(const CBlockIndex* block_index, BlockFilter& return ReadFilterFromDisk(entry.pos, filter_out); } -bool BlockFilterIndex::LookupFilterHeader(const CBlockIndex* block_index, uint256& header_out) const +bool BlockFilterIndex::LookupFilterHeader(const CBlockIndex* block_index, uint256& header_out) { + LOCK(m_cs_headers_cache); + + bool is_checkpoint{block_index->nHeight % CFCHECKPT_INTERVAL == 0}; + + if (is_checkpoint) { + // Try to find the block in the headers cache if this is a checkpoint height. + auto header = m_headers_cache.find(block_index->GetBlockHash()); + if (header != m_headers_cache.end()) { + header_out = header->second; + return true; + } + } + DBVal entry; if (!LookupOne(*m_db, block_index, entry)) { return false; } + if (is_checkpoint && + m_headers_cache.size() < CF_HEADERS_CACHE_MAX_SZ) { + // Add to the headers cache if this is a checkpoint height. + m_headers_cache.emplace(block_index->GetBlockHash(), entry.header); + } + header_out = entry.header; return true; } |