From 46c73be4710a6aa1be84a19151f73d87413a52b4 Mon Sep 17 00:00:00 2001 From: Thiago Macieira Date: Sat, 30 Jan 2016 09:48:41 -0800 Subject: Fix livelock at application exit if threads were running This only happened in debug mode, though, because in release mode the warning wasn't printed and the socket notifier was removed. In debug mode, this loop in closingDown() never exited: while (!d->sn_read.isEmpty()) unregisterSocketNotifier((*(d->sn_read.begin()))->obj); [ChangeLog][QtCore][QThread] Fixed a bug that would cause debug-mode applications to live lock on exit if they had a global static containing a QThread that wasn't properly exited. Task-number: QTBUG-49870 Change-Id: I7a9e11d7b64a4cc78e24ffff142e457a4540d6b6 Reviewed-by: Mat Sutcliffe Reviewed-by: Roland Winklmeier Reviewed-by: Friedemann Kleint --- src/corelib/kernel/qeventdispatcher_win.cpp | 17 ++++++++++++----- src/corelib/kernel/qeventdispatcher_win_p.h | 1 + 2 files changed, 13 insertions(+), 5 deletions(-) (limited to 'src/corelib/kernel') diff --git a/src/corelib/kernel/qeventdispatcher_win.cpp b/src/corelib/kernel/qeventdispatcher_win.cpp index 1a14500bd4..b3df139743 100644 --- a/src/corelib/kernel/qeventdispatcher_win.cpp +++ b/src/corelib/kernel/qeventdispatcher_win.cpp @@ -935,9 +935,8 @@ void QEventDispatcherWin32::registerSocketNotifier(QSocketNotifier *notifier) void QEventDispatcherWin32::unregisterSocketNotifier(QSocketNotifier *notifier) { Q_ASSERT(notifier); - int sockfd = notifier->socket(); - int type = notifier->type(); #ifndef QT_NO_DEBUG + int sockfd = notifier->socket(); if (sockfd < 0) { qWarning("QSocketNotifier: Internal error"); return; @@ -946,8 +945,16 @@ void QEventDispatcherWin32::unregisterSocketNotifier(QSocketNotifier *notifier) return; } #endif + doUnregisterSocketNotifier(notifier); +} +void QEventDispatcherWin32::doUnregisterSocketNotifier(QSocketNotifier *notifier) +{ Q_D(QEventDispatcherWin32); + int type = notifier->type(); + int sockfd = notifier->socket(); + Q_ASSERT(sockfd >= 0); + QSFDict::iterator it = d->active_fd.find(sockfd); if (it != d->active_fd.end()) { QSockFd &sd = it.value(); @@ -1203,11 +1210,11 @@ void QEventDispatcherWin32::closingDown() // clean up any socketnotifiers while (!d->sn_read.isEmpty()) - unregisterSocketNotifier((*(d->sn_read.begin()))->obj); + doUnregisterSocketNotifier((*(d->sn_read.begin()))->obj); while (!d->sn_write.isEmpty()) - unregisterSocketNotifier((*(d->sn_write.begin()))->obj); + doUnregisterSocketNotifier((*(d->sn_write.begin()))->obj); while (!d->sn_except.isEmpty()) - unregisterSocketNotifier((*(d->sn_except.begin()))->obj); + doUnregisterSocketNotifier((*(d->sn_except.begin()))->obj); Q_ASSERT(d->active_fd.isEmpty()); // clean up any timers diff --git a/src/corelib/kernel/qeventdispatcher_win_p.h b/src/corelib/kernel/qeventdispatcher_win_p.h index 9a53e06730..222562dfce 100644 --- a/src/corelib/kernel/qeventdispatcher_win_p.h +++ b/src/corelib/kernel/qeventdispatcher_win_p.h @@ -103,6 +103,7 @@ public: protected: QEventDispatcherWin32(QEventDispatcherWin32Private &dd, QObject *parent = 0); virtual void sendPostedEvents(); + void doUnregisterSocketNotifier(QSocketNotifier *notifier); private: friend LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPARAM lp); -- cgit v1.2.3