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blockchain: ensure all blocks get their longhash precalculated

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If the number of blocks to check was not a multiple of the
number of preparation threads, the last few blocks would
not be included in the threaded long hash calculation.
Those would still get calculated when the block gets added
to the chain, however, so this was only a tiny performance
hit, rather than a security bug.
This commit is contained in:
moneromooo-monero
2017-07-27 18:18:49 +01:00
parent ff4bcaed81
commit 91aa90fc79
2 changed files with 4 additions and 2 deletions
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src/cryptonote_core/blockchain.cpp
+3 -1
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@@ -3743,9 +3743,11 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::list<block_complete_e
if (!blocks_exist)
{
m_blocks_longhash_table.clear();
uint64_t thread_height = height;
for (uint64_t i = 0; i < threads; i++)
{
thread_list.push_back(new boost::thread(attrs, boost::bind(&Blockchain::block_longhash_worker, this, height + (i * batches), std::cref(blocks[i]), std::ref(maps[i]))));
thread_list.push_back(new boost::thread(attrs, boost::bind(&Blockchain::block_longhash_worker, this, thread_height, std::cref(blocks[i]), std::ref(maps[i]))));
thread_height += blocks[i].size();
}
for (size_t j = 0; j < thread_list.size(); j++)