diff options
Diffstat (limited to 'src/index')
| -rw-r--r-- | src/index/base.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/index/base.cpp b/src/index/base.cpp index 88c2ce98fa..3eea09b17d 100644 --- a/src/index/base.cpp +++ b/src/index/base.cpp @@ -298,6 +298,10 @@ void BaseIndex::BlockConnected(const std::shared_ptr<const CBlock>& block, const } interfaces::BlockInfo block_info = kernel::MakeBlockInfo(pindex, block.get()); if (CustomAppend(block_info)) { + // Setting the best block index is intentionally the last step of this + // function, so BlockUntilSyncedToCurrentChain callers waiting for the + // best block index to be updated can rely on the block being fully + // processed, and the index object being safe to delete. SetBestBlockIndex(pindex); } else { FatalError("%s: Failed to write block %s to index", @@ -414,10 +418,17 @@ IndexSummary BaseIndex::GetSummary() const void BaseIndex::SetBestBlockIndex(const CBlockIndex* block) { assert(!node::fPruneMode || AllowPrune()); - m_best_block_index = block; if (AllowPrune() && block) { node::PruneLockInfo prune_lock; prune_lock.height_first = block->nHeight; WITH_LOCK(::cs_main, m_chainstate->m_blockman.UpdatePruneLock(GetName(), prune_lock)); } + + // Intentionally set m_best_block_index as the last step in this function, + // after updating prune locks above, and after making any other references + // to *this, so the BlockUntilSyncedToCurrentChain function (which checks + // m_best_block_index as an optimization) can be used to wait for the last + // BlockConnected notification and safely assume that prune locks are + // updated and that the index object is safe to delete. + m_best_block_index = block; } |