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  1. Qt
  2. QTBUG-133206

QThreadPrivate saying "QThreadStorage: Thread %p exited after QThreadStorage %d destroyed"

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Details

    • Bug
    • Resolution: Out of scope
    • P1: Critical
    • None
    • 6.9.0 Beta2
    • Core: Threads
    • None
    • e0a1f4915 (dev), bcc0e6124 (6.9), 12d4bf1ab (6.8), e32f28034 (dev), d5c5f9f35 (6.9), 2ef615228 (6.8)

    Description

      Consider the following code:

      #include <QCoreApplication>
#include <QLocale>
#include <QThreadStorage>
#include <QTimer>
#include <QtGlobal>

using ParseCache = QThreadStorage<int>;
Q_GLOBAL_STATIC(ParseCache, sGlobalParse)

class Tester
{
public:
    ~Tester()
    {
        QLocale().name();
        sGlobalParse->localData();
    }
};

Q_GLOBAL_STATIC(Tester, globalTestObject)

int main(int argc, char **argv)
{
    QCoreApplication app(argc, argv);

    Tester *t = globalTestObject();
    QTimer::singleShot(0, qApp, SLOT(quit()));
    return app.exec();
}

      With Qt 6.9 Beta 2 it crashes on exit

      ASSERT failure in QGlobalStatic<Holder>::Type& QGlobalStatic<Holder>::operator*() [with Holder = QtGlobalStatic::Holder<\{anonymous}::Q_QGS_defaultLocalePrivate>; Type = QSharedDataPointer<QLocalePrivate>]: "The global static was used after being destroyed", file /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h, line 92

       

      #0  __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44

#1  0x00007ffff5a9a1c3 in __pthread_kill_internal (threadid=<optimized out>, signo=6) at pthread_kill.c:78

#2  0x00007ffff5a41436 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26

#3  0x00007ffff5a2891a in __GI_abort () at abort.c:79

#4  0x00007ffff63ab96c in qAbort () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qassert.cpp:46

#5  0x00007ffff6403666 in qt_message_fatal<QString&> (context=..., message=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:2149

#6  0x00007ffff6404e91 in qt_message(QtMsgType, const QMessageLogContext &, const char *, typedef __va_list_tag __va_list_tag *) (msgType=msgType@entry=QtFatalMsg, context=..., msg=msg@entry=0x7ffff6efc460 "ASSERT failure in %s: \"%s\", file %s, line %d",  
    ap=ap@entry=0x7ffff3004c20) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:381

#7  0x00007ffff641343f in QMessageLogger::fatal (this=this@entry=0x7ffff2e21da0, msg=msg@entry=0x7ffff6efc460 "ASSERT failure in %s: \"%s\", file %s, line %d") at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:883

#8  0x00007ffff63abc4b in qt_assert_x (where=where@entry=0x7ffff6f73140 "QGlobalStatic<Holder>::Type& QGlobalStatic<Holder>::operator*() [with Holder = QtGlobalStatic::Holder<{anonymous}::Q_QGS_defaultLocalePrivate>; Type = QSharedDataPointer<QLocalePrivate>]",  
    what=what@entry=0x7ffff6f73000 "The global static was used after being destroyed", file=file@entry=0x7ffff6f72f80 "/home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h", line=line@entry=92)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qassert.cpp:114

#9  0x00007ffff6833934 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_defaultLocalePrivate> >::operator* (this=this@entry=0x7ffff72b4ce0 <defaultLocalePrivate>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:92

#10 0x00007ffff683394e in QLocale::QLocale (this=this@entry=0x7ffff2e21d20) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/text/qlocale.cpp:1214

#11 0x00007ffff6514058 in QResourceFileEnginePrivate::QResourceFileEnginePrivate (this=0x508000000320, q=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qresource.cpp:1401

#12 0x00007ffff650de5d in QResourceFileEngine::QResourceFileEngine (this=this@entry=0x502000000770, file=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qresource.cpp:1416

#13 0x00007ffff64bd53c in std::make_unique<QResourceFileEngine, QString const&> () at /usr/include/c++/14/bits/unique_ptr.h:1077

#14 0x00007ffff64bb710 in _q_createLegacyEngine_recursive (entry=..., data=..., engine=std::unique_ptr<QAbstractFileEngine> = {...}, resolvingEntry=resolvingEntry@entry=false) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qfilesystemengine.cpp:129

#15 0x00007ffff64bc033 in QFileSystemEngine::createLegacyEngine (entry=..., data=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qfilesystemengine.cpp:183

#16 0x00007ffff64aea78 in QFileInfo::exists (path=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qfileinfo.cpp:752

#17 0x00007ffff6493dc7 in QFile::exists (fileName=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qfile.cpp:370

#18 0x00007ffff63f7131 in findConfiguration () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:106

#19 0x00007ffff63f7a38 in QLibrarySettings::load (this=this@entry=0x7ffff72af520 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qt_library_settings> >::instance()::holder>)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:79

#20 0x00007ffff63f7cf7 in QLibrarySettings::QLibrarySettings (this=0x7ffff72af520 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qt_library_settings> >::instance()::holder>)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:59

#21 0x00007ffff63f7d33 in (anonymous namespace)::Q_QGS_qt_library_settings::innerFunction (pointer=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:55

#22 QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qt_library_settings>::Holder (this=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:37

#23 0x00007ffff63f7da9 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qt_library_settings> >::instance () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:100

#24 0x00007ffff63f7e29 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qt_library_settings> >::operator() (this=this@entry=0x7ffff72af5a0 <qt_library_settings>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:82

#25 0x00007ffff63f8f65 in havePaths () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:148

#26 0x00007ffff63fa746 in QLibraryInfoPrivate::paths (p=p@entry=QLibraryInfo::DataPath, usageMode=usageMode@entry=QLibraryInfoPrivate::RegularUsage) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:610

#27 0x00007ffff63fbc70 in QLibraryInfoPrivate::path (p=p@entry=QLibraryInfo::DataPath, usageMode=usageMode@entry=QLibraryInfoPrivate::RegularUsage) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:669

#28 0x00007ffff63fbdeb in QLibraryInfo::path (p=p@entry=QLibraryInfo::DataPath) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlibraryinfo.cpp:523

#29 0x00007ffff64ef8ef in QLoggingRegistry::initializeRules (this=this@entry=0x7ffff72b0d60 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtLoggingRegistry> >::instance()::holder>)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingregistry.cpp:309

#30 0x00007ffff64f0538 in QLoggingRegistry::QLoggingRegistry (this=0x7ffff72b0d60 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtLoggingRegistry> >::instance()::holder>)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingregistry.cpp:239

#31 0x00007ffff64f05f1 in (anonymous namespace)::Q_QGS_qtLoggingRegistry::innerFunction (pointer=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingregistry.cpp:29

#32 QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtLoggingRegistry>::Holder (this=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:37

#33 0x00007ffff64f0667 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtLoggingRegistry> >::instance () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:100

#34 0x00007ffff64f06e7 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtLoggingRegistry> >::operator() (this=this@entry=0x7ffff72b0ec0 <qtLoggingRegistry>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:82

#35 0x00007ffff64f070a in QLoggingRegistry::instance () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingregistry.cpp:424

#36 0x00007ffff64e9dcf in QLoggingCategory::init (this=0x7ffff72b0c60 <QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtDefaultCategory> >::instance()::holder>, category=<optimized out>, severityLevel=QtDebugMsg)

    at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingcategory.cpp:188

#37 0x00007ffff64e9e58 in QLoggingCategory::QLoggingCategory (this=<optimized out>, category=<optimized out>, enableForLevel=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingcategory.cpp:176

#38 0x00007ffff64e9e7d in (anonymous namespace)::Q_QGS_qtDefaultCategory::innerFunction (pointer=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingcategory.cpp:10

#39 QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtDefaultCategory>::Holder (this=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:37

#40 0x00007ffff64e9ef3 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtDefaultCategory> >::instance () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:100

#41 0x00007ffff64e9f73 in QGlobalStatic<QtGlobalStatic::Holder<(anonymous namespace)::Q_QGS_qtDefaultCategory> >::operator() (this=this@entry=0x7ffff72b0ca0 <qtDefaultCategory>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qglobalstatic.h:82

#42 0x00007ffff64ea1d6 in QLoggingCategory::defaultCategory () at /home/nico/workspace/qt6-dev/qtbase/src/corelib/io/qloggingcategory.cpp:317

#43 0x00007ffff6404662 in qt_message_print (msgType=msgType@entry=QtWarningMsg, context=..., message=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:2103

#44 0x00007ffff6404de4 in qt_message(QtMsgType, const QMessageLogContext &, const char *, typedef __va_list_tag __va_list_tag *) (msgType=msgType@entry=QtWarningMsg, context=...,  
    msg=msg@entry=0x7ffff7046cc0 "QThreadStorage: Thread %p exited after QThreadStorage %d destroyed", ap=ap@entry=0x7ffff3003420) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:378

#45 0x00007ffff6412b39 in QMessageLogger::warning (this=this@entry=0x7ffff2e20840, msg=msg@entry=0x7ffff7046cc0 "QThreadStorage: Thread %p exited after QThreadStorage %d destroyed") at /home/nico/workspace/qt6-dev/qtbase/src/corelib/global/qlogging.cpp:633

#46 0x00007ffff6ac1994 in QThreadStorageData::finish (p=0x50d0000000a8) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthreadstorage.cpp:160

#47 0x00007ffff6a8e4c5 in operator() (__closure=__closure@entry=0x7ffff2d06160) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthread_unix.cpp:423

#48 0x00007ffff6a8e5c0 in (anonymous namespace)::terminate_on_exception<QThreadPrivate::finish()::<lambda()> >(struct {...} &&) (t=...) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthread_unix.cpp:325

#49 0x00007ffff6a8e6a9 in QThreadPrivate::finish (this=this@entry=0x511000000180) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthread_unix.cpp:404

#50 0x00007ffff6a8f9d8 in destroy_current_thread_data (p=0x50d000000040) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthread_unix.cpp:154

#51 0x00007ffff6a8fa52 in Cleanup::~Cleanup (this=<optimized out>, __in_chrg=<optimized out>) at /home/nico/workspace/qt6-dev/qtbase/src/corelib/thread/qthread_unix.cpp:204

#52 0x00007ffff5a43eb1 in __run_exit_handlers (status=0, listp=0x7ffff5bfc680 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:108

#53 0x00007ffff5a43f80 in __GI_exit (status=<optimized out>) at exit.c:138

      It worked until and including 6.9 Beta 1

      Bisected to https://codereview.qt-project.org/c/qt/qtbase/+/615204

      Found via unit tests from KConfig: https://invent.kde.org/frameworks/kconfig/-/jobs/2499176

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            thiago Thiago Macieira
            nicolasfella Nicolas Fella
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              Created:
              Updated:
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