NSURLConnection线程崩溃

Question

我在我的应用程序中遇到随机崩溃，堆栈跟踪不包含我的任何代码，我正在努力弄清楚导致它的原因。堆栈跟踪始终相同：

#0  0x00007fff903610e9 in __cxa_throw ()
#1  0x00007fff922199c2 in Security::UnixError::throwMe(int) ()
#2  0x00007fff920b068d in Security::safeCopyFile(char const*, unsigned int, char const*, unsigned short) ()
#3  0x00007fff920af765 in Security::MDSSession::updateDataBases() ()
#4  0x00007fff9211318b in Security::MDSSession::DbOpen(char const*, cssm_net_address const*, unsigned int, Security::AccessCredentials const*, void const*, long&) ()
#5  0x00007fff9211300b in mds_DbOpen(long, char const*, cssm_net_address const*, unsigned int, cssm_access_credentials const*, void const*, long*) ()
#6  0x00007fff920aebee in Security::MDSClient::Directory::cdsa() const ()
#7  0x00007fff922013ee in Security::MDSClient::Directory::dlGetFirst(cssm_query const&, cssm_db_record_attribute_data&, cssm_data*, cssm_db_unique_record*&) ()
#8  0x00007fff920ae6db in Security::CssmClient::Table<Security::MDSClient::Common>::startQuery(Security::CssmQuery const&, bool) ()
#9  0x00007fff920ae1e9 in Security::CssmClient::Table<Security::MDSClient::Common>::find(Security::CssmClient::Query const&) ()
#10 0x00007fff920ae140 in Security::CssmClient::Table<Security::MDSClient::Common>::fetch(Security::CssmClient::Query const&, int) ()
#11 0x00007fff920ad71f in MdsComponent::MdsComponent(Security::Guid const&) ()
#12 0x00007fff920ad29b in CssmManager::loadModule(Security::Guid const&, unsigned int, Security::ModuleCallback const&) ()
#13 0x00007fff920ad1a2 in CSSM_ModuleLoad ()
#14 0x00007fff92138db2 in loadModule ()
#15 0x00007fff921093c1 in attachToModules ()
#16 0x00007fff9210931d in attachToAll ()
#17 0x00007fff92109253 in SSLNewContext ()
#18 0x00007fff95016162 in SocketStream::securitySetInfo_NoLock(__CFDictionary const*) ()
#19 0x00007fff950159fd in SocketStream::setProperty(void const*, __CFString const*, void const*) ()
#20 0x00007fff9501552c in virtual thunk to SocketStream::setProperty(void const*, __CFString const*, void const*) ()
#21 0x00007fff950160db in ReadStreamCallbacks::_setProperty(__CFReadStream*, __CFString const*, void const*, void*) ()
#22 0x00007fff8f4ef604 in CFReadStreamSetProperty ()
#23 0x00007fff9501457e in HTTPNetConnection::createStreams(__CFWriteStream**, __CFReadStream**) ()
#24 0x00007fff95014426 in NetConnection::initialize(NetConnection::Options&) ()
#25 0x00007fff95014354 in HTTPNetConnection::initialize(__CFString const*, int, unsigned int, __CFDictionary const*, NetConnection::Options&) ()
#26 0x00007fff950142ab in HTTPNetConnection_NoAuth::initialize(__CFString const*, int, unsigned int, __CFDictionary const*, NetConnection::Options&) ()
#27 0x00007fff950141d4 in CFHTTPConnectionCreate ()
#28 0x00007fff95014089 in HTTPConnectionCacheEntry::findOrCreateEmptyUnauthenticatedNetConnection(HTTPProtocol*, __CFHTTPMessage*, unsigned char*, __CFError**) ()
#29 0x00007fff95012f84 in HTTPConnectionCacheEntry::enqueueRequestForProtocol(HTTPProtocol*, __CFHTTPMessage*) ()
#30 0x00007fff95012901 in HTTPConnectionCache::EnqueueRequestForProtocol(HTTPProtocol*, __CFHTTPMessage*) ()
#31 0x00007fff9500f283 in HTTPProtocol::createStream() ()
#32 0x00007fff9500eb82 in HTTPProtocol::createAndOpenStream() ()
#33 0x00007fff9500cef1 in URLConnectionLoader::loaderScheduleOriginLoadLocked(_CFURLRequest const*) ()
#34 0x00007fff950dec12 in URLConnectionLoader::loaderScheduleOriginLoad(_CFURLRequest const*) ()
#35 0x00007fff950de637 in URLConnectionLoader::LoaderConnectionEventQueue::processAllEventsAndConsumePayload(XConnectionEventInfo<XLoaderEvent, XLoaderEventParams>*, long) ()
#36 0x00007fff9500c959 in URLConnectionLoader::processEvents() ()
#37 0x00007fff950079ee in MultiplexerSource::perform() ()
#38 0x00007fff8f45a6e1 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ ()
#39 0x00007fff8f459f4d in __CFRunLoopDoSources0 ()
#40 0x00007fff8f480d39 in __CFRunLoopRun ()
#41 0x00007fff8f480676 in CFRunLoopRunSpecific ()
#42 0x00007fff8dad5ffb in +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] ()
#43 0x00007fff8daca74e in -[NSThread main] ()
#44 0x00007fff8daca6c6 in __NSThread__main__ ()
#45 0x00007fff8f3b48bf in _pthread_start ()
#46 0x00007fff8f3b7b75 in thread_start ()

我还有其他几个线程，但我的所有线程都在等待输入，唯一感兴趣的其他线程似乎就是这个：

#0  0x00007fff90342a8e in pread ()
#1  0x00007fff8ba90ce5 in unixRead ()
#2  0x00007fff8ba8cc33 in sqlite3BtreeOpen ()
#3  0x00007fff8ba88fc6 in openDatabase ()
#4  0x00007fff95002c7d in __CFURLCache::OpenDatabase() ()
#5  0x00007fff95002800 in ProcessCacheTasks(__CFURLCache*, bool) ()
#6  0x00007fff95002232 in _CFURLCacheTimerCallback(void*) ()
#7  0x00007fff94e238ba in _dispatch_call_block_and_release ()
#8  0x00007fff94e2510a in _dispatch_queue_drain ()
#9  0x00007fff94e24f66 in _dispatch_queue_invoke ()
#10 0x00007fff94e24760 in _dispatch_worker_thread2 ()
#11 0x00007fff8f3b63da in _pthread_wqthread ()
#12 0x00007fff8f3b7b85 in start_wqthread ()

我在这里提到的那个帖子，我在另一个问题中看到类似的崩溃与NSURLCache有关。我没有直接调用NSURLCache上的任何方法，但我使用的是一个sqlite数据库，在上面的线程中也提到过。

有没有人以前见过这个或者想知道在哪里解决这个问题？

Answer 1

很有可能启用一般异常断点。导航到断点窗格并禁用它们（如图所示）：

祝你好运。