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Merge bitcoin/bitcoin#24299: validation, refactor: UnloadBlockIndex and ChainstateManager::Reset thread safety cleanups

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ae9ceed3e2 validation, refactoring: remove ChainstateManager::Reset() (Jon Atack)
daad0093e3 validation: replace lock with annotation in UnloadBlockIndex() (Jon Atack)

Pull request description:

  Thread safety refactoring seen in #24177:
  - replace re-acquiring lock cs_main with a thread safety annotation in UnloadBlockIndex()
  - remove ChainstateManager::Reset(), as it is currently unused (can be reintroduced in the test utilities if needed for unit testing)

ACKs for top commit:
  laanwj:
    Code review ACK ae9ceed3e2
  vasild:
    ACK ae9ceed3e2
  klementtan:
    crACK ae9ceed3e2

Tree-SHA512: cebb782572997cc2dda01590d6bb6c5e479e8202324d8b6ff459b814ce09e818b996c881736bfebd1b8bf4b6d7a0f79faf3ffea176a4699dd7d7429de2db2d13
This commit is contained in:
laanwj
2022-03-07 11:49:16 +01:00
parent f6d335e828 ae9ceed3e2
commit cba41db327
3 changed files with 4 additions and 18 deletions
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8
src/validation.h
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@@ -138,7 +138,7 @@ extern CBlockIndex *pindexBestHeader;
extern const std::vector<std::string> CHECKLEVEL_DOC;
/** Unload database information */
void UnloadBlockIndex(CTxMemPool* mempool, ChainstateManager& chainman);
void UnloadBlockIndex(CTxMemPool* mempool, ChainstateManager& chainman) EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
/** Run instances of script checking worker threads */
void StartScriptCheckWorkerThreads(int threads_num);
/** Stop all of the script checking worker threads */
@@ -991,17 +991,13 @@ public:
//! Unload block index and chain data before shutdown.
void Unload() EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
//! Clear (deconstruct) chainstate data.
void Reset();
//! Check to see if caches are out of balance and if so, call
//! ResizeCoinsCaches() as needed.
void MaybeRebalanceCaches() EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
~ChainstateManager() {
LOCK(::cs_main);
UnloadBlockIndex(/* mempool */ nullptr, *this);
Reset();
UnloadBlockIndex(/*mempool=*/nullptr, *this);
}
};