Details
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Bug
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Resolution: Fixed
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P3: Somewhat important
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None
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5.6.1, 5.7.0, 5.10.1
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None
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OS X 10.10, 10.11, 10.12
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macOS
Description
When using QCoreApplication with CoreFoundation event dispatcher, attempting to create QNetworkAccessManager object seems to deadlock. Sample code:
#include <QtCore/QCoreApplication> #include <QtNetwork/QNetworkAccessManager> #include <cstdlib> int main(int argc, char** argv) { ::setenv("QT_EVENT_DISPATCHER_CORE_FOUNDATION", "1", true); QCoreApplication a(argc, argv); QNetworkAccessManager nam; return 0; }
Removing setenv call above, program terminates properly. Leaving it in makes program never quit; sampling the program produces the following callstacks:
Call graph:
942 Thread_41859195 DispatchQueue_1: com.apple.main-thread (serial)
+ 942 start (in libdyld.dylib) + 1 [0x7fff942ca5c9]
+ 942 main (in a.out) + 84 [0x100a5be74] a.cpp:10
+ 942 QNetworkAccessManager::QNetworkAccessManager(QObject*) (in QtNetwork) + 40 [0x1010bab48]
+ 942 QNetworkAccessManagerPrivate::QNetworkAccessManagerPrivate() (in QtNetwork) + 183 [0x1010bfef7]
+ 942 QNetworkConfigurationManager::QNetworkConfigurationManager(QObject*) (in QtNetwork) + 36 [0x1010f0944]
+ 942 qNetworkConfigurationManagerPrivate() (in QtNetwork) + 250 [0x1010f08fa]
+ 942 QNetworkConfigurationManagerPrivate::initialize() (in QtNetwork) + 166 [0x1010f2066]
+ 942 QNetworkConfigurationManagerPrivate::updateConfigurations() (in QtNetwork) + 2076 [0x1010f288c]
+ 942 QMetaObject::invokeMethod(QObject*, char const*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) (in QtCore) + 2196 [0x100c53a44]
+ 942 QMetaMethod::invoke(QObject*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument) const (in QtCore) + 1717 [0x100c54675]
+ 942 QSemaphore::acquire(int) (in QtCore) + 79 [0x100a8a3ef]
+ 942 QWaitCondition::wait(QMutex*, unsigned long) (in QtCore) + 162 [0x100a90012]
+ 942 QWaitConditionPrivate::wait(unsigned long) (in QtCore) + 75 [0x100a9016b]
+ 942 __psynch_cvwait (in libsystem_kernel.dylib) + 10 [0x7fff92947136]
942 Thread_41859197 DispatchQueue_2: com.apple.libdispatch-manager (serial)
+ 942 _dispatch_mgr_thread (in libdispatch.dylib) + 52 [0x7fff9085b26e]
+ 942 kevent64 (in libsystem_kernel.dylib) + 10 [0x7fff92948232]
942 Thread_41859236: Qt bearer thread
942 thread_start (in libsystem_pthread.dylib) + 13 [0x7fff9775c3ed]
942 _pthread_start (in libsystem_pthread.dylib) + 176 [0x7fff9775efd7]
942 _pthread_body (in libsystem_pthread.dylib) + 131 [0x7fff9775f05a]
942 QThreadPrivate::start(void*) (in QtCore) + 362 [0x100a8eb3a]
942 QThread::exec() (in QtCore) + 110 [0x100a8b1ae]
942 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) (in QtCore) + 401 [0x100c46eb1]
942 QEventDispatcherCoreFoundation::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) (in QtCore) + 616 [0x100d097a8]
942 CFRunLoopRunSpecific (in CoreFoundation) + 296 [0x7fff9b16abd8]
942 __CFRunLoopRun (in CoreFoundation) + 1371 [0x7fff9b16b37b]
942 __CFRunLoopServiceMachPort (in CoreFoundation) + 212 [0x7fff9b16beb4]
942 mach_msg (in libsystem_kernel.dylib) + 55 [0x7fff9294164f]
942 mach_msg_trap (in libsystem_kernel.dylib) + 10 [0x7fff929424de]
Attachments
Issue Links
- relates to
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- Closed
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