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Fix deadlock in LocalStore::addSignatures()

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Fixes #4367.
This commit is contained in:
Eelco Dolstra 2021-01-05 11:47:29 +01:00
parent c51ee5c033
commit 8af4f886e2
2 changed files with 52 additions and 45 deletions
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95
src/libstore/local-store.cc
View file

@ -736,57 +736,62 @@ void LocalStore::queryPathInfoUncached(const StorePath & path,
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept
{ {
try { try {
callback(retrySQLite<std::shared_ptr<ValidPathInfo>>([&]() { callback(retrySQLite<std::shared_ptr<const ValidPathInfo>>([&]() {
auto state(_state.lock()); auto state(_state.lock());
return queryPathInfoInternal(*state, path);
/* Get the path info. */
auto useQueryPathInfo(state->stmts->QueryPathInfo.use()(printStorePath(path)));
if (!useQueryPathInfo.next())
return std::shared_ptr<ValidPathInfo>();
auto id = useQueryPathInfo.getInt(0);
auto narHash = Hash::dummy;
try {
narHash = Hash::parseAnyPrefixed(useQueryPathInfo.getStr(1));
} catch (BadHash & e) {
throw Error("invalid-path entry for '%s': %s", printStorePath(path), e.what());
}
auto info = std::make_shared<ValidPathInfo>(path, narHash);
info->id = id;
info->registrationTime = useQueryPathInfo.getInt(2);
auto s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 3);
if (s) info->deriver = parseStorePath(s);
/* Note that narSize = NULL yields 0. */
info->narSize = useQueryPathInfo.getInt(4);
info->ultimate = useQueryPathInfo.getInt(5) == 1;
s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 6);
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
s = (const char *) sqlite3_column_text(state->stmts->QueryPathInfo, 7);
if (s) info->ca = parseContentAddressOpt(s);
/* Get the references. */
auto useQueryReferences(state->stmts->QueryReferences.use()(info->id));
while (useQueryReferences.next())
info->references.insert(parseStorePath(useQueryReferences.getStr(0)));
return info;
})); }));
} catch (...) { callback.rethrow(); } } catch (...) { callback.rethrow(); }
} }
std::shared_ptr<const ValidPathInfo> LocalStore::queryPathInfoInternal(State & state, const StorePath & path)
{
/* Get the path info. */
auto useQueryPathInfo(state.stmts->QueryPathInfo.use()(printStorePath(path)));
if (!useQueryPathInfo.next())
return std::shared_ptr<ValidPathInfo>();
auto id = useQueryPathInfo.getInt(0);
auto narHash = Hash::dummy;
try {
narHash = Hash::parseAnyPrefixed(useQueryPathInfo.getStr(1));
} catch (BadHash & e) {
throw Error("invalid-path entry for '%s': %s", printStorePath(path), e.what());
}
auto info = std::make_shared<ValidPathInfo>(path, narHash);
info->id = id;
info->registrationTime = useQueryPathInfo.getInt(2);
auto s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 3);
if (s) info->deriver = parseStorePath(s);
/* Note that narSize = NULL yields 0. */
info->narSize = useQueryPathInfo.getInt(4);
info->ultimate = useQueryPathInfo.getInt(5) == 1;
s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 6);
if (s) info->sigs = tokenizeString<StringSet>(s, " ");
s = (const char *) sqlite3_column_text(state.stmts->QueryPathInfo, 7);
if (s) info->ca = parseContentAddressOpt(s);
/* Get the references. */
auto useQueryReferences(state.stmts->QueryReferences.use()(info->id));
while (useQueryReferences.next())
info->references.insert(parseStorePath(useQueryReferences.getStr(0)));
return info;
}
/* Update path info in the database. */ /* Update path info in the database. */
void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info) void LocalStore::updatePathInfo(State & state, const ValidPathInfo & info)
{ {
@ -1608,7 +1613,7 @@ void LocalStore::addSignatures(const StorePath & storePath, const StringSet & si
SQLiteTxn txn(state->db); SQLiteTxn txn(state->db);
auto info = std::const_pointer_cast<ValidPathInfo>(std::shared_ptr<const ValidPathInfo>(queryPathInfo(storePath))); auto info = std::const_pointer_cast<ValidPathInfo>(queryPathInfoInternal(*state, storePath));
info->sigs.insert(sigs.begin(), sigs.end()); info->sigs.insert(sigs.begin(), sigs.end());

2
src/libstore/local-store.hh
View file

@ -235,6 +235,8 @@ private:
void verifyPath(const Path & path, const StringSet & store, void verifyPath(const Path & path, const StringSet & store,
PathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors); PathSet & done, StorePathSet & validPaths, RepairFlag repair, bool & errors);
std::shared_ptr<const ValidPathInfo> queryPathInfoInternal(State & state, const StorePath & path);
void updatePathInfo(State & state, const ValidPathInfo & info); void updatePathInfo(State & state, const ValidPathInfo & info);
void upgradeStore6(); void upgradeStore6();