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Fix deadlock in blockchain. (#8977)

This commit is contained in:
Tomasz Drwięga 2018-06-26 20:49:06 +02:00 committed by Afri Schoedon
parent 48a54efcb2
commit 19a6725430
1 changed files with 9 additions and 3 deletions
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12
ethcore/src/blockchain/blockchain.rs
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@ -1450,18 +1450,24 @@ impl BlockChain {
/// Returns general blockchain information
pub fn chain_info(&self) -> BlockChainInfo {
// Make sure to call internal methods first to avoid
// recursive locking of `best_block`.
let first_block_hash = self.first_block();
let first_block_number = self.first_block_number().into();
let genesis_hash = self.genesis_hash();
// ensure data consistencly by locking everything first
let best_block = self.best_block.read();
let best_ancient_block = self.best_ancient_block.read();
BlockChainInfo {
total_difficulty: best_block.total_difficulty,
pending_total_difficulty: best_block.total_difficulty,
genesis_hash: self.genesis_hash(),
genesis_hash,
best_block_hash: best_block.header.hash(),
best_block_number: best_block.header.number(),
best_block_timestamp: best_block.header.timestamp(),
first_block_hash: self.first_block(),
first_block_number: From::from(self.first_block_number()),
first_block_hash,
first_block_number,
ancient_block_hash: best_ancient_block.as_ref().map(|b| b.hash),
ancient_block_number: best_ancient_block.as_ref().map(|b| b.number),
}