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blockchain: fix race between two external mining threads

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moneromooo-monero 2018-12-02 13:06:41 +00:00
parent 58ce16d4d9
commit affff949f9
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GPG Key ID: 686F07454D6CEFC3
1 changed files with 3 additions and 5 deletions
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8
src/cryptonote_core/blockchain.cpp
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@ -1237,7 +1237,9 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m
uint64_t already_generated_coins;
uint64_t pool_cookie;
CRITICAL_REGION_BEGIN(m_blockchain_lock);
m_tx_pool.lock();
const auto unlock_guard = epee::misc_utils::create_scope_leave_handler([&]() { m_tx_pool.unlock(); });
CRITICAL_REGION_LOCAL(m_blockchain_lock);
height = m_db->height();
if (m_btc_valid) {
// The pool cookie is atomic. The lack of locking is OK, as if it changes
@ -1273,8 +1275,6 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m
median_weight = m_current_block_cumul_weight_limit / 2;
already_generated_coins = m_db->get_block_already_generated_coins(height - 1);
CRITICAL_REGION_END();
size_t txs_weight;
uint64_t fee;
if (!m_tx_pool.fill_block_template(b, median_weight, already_generated_coins, txs_weight, fee, expected_reward, m_hardfork->get_current_version()))
@ -1285,7 +1285,6 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m
#if defined(DEBUG_CREATE_BLOCK_TEMPLATE)
size_t real_txs_weight = 0;
uint64_t real_fee = 0;
CRITICAL_REGION_BEGIN(m_tx_pool.m_transactions_lock);
for(crypto::hash &cur_hash: b.tx_hashes)
{
auto cur_res = m_tx_pool.m_transactions.find(cur_hash);
@ -1329,7 +1328,6 @@ bool Blockchain::create_block_template(block& b, const account_public_address& m
{
LOG_ERROR("Creating block template: error: wrongly calculated fee");
}
CRITICAL_REGION_END();
MDEBUG("Creating block template: height " << height <<
", median weight " << median_weight <<
", already generated coins " << already_generated_coins <<