Details
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Bug
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Resolution: Invalid
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Not Evaluated
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None
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6.2.4
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None
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Linux/Other display system
Description
Hi,
I have an issue on a Linux computer with the following gdb session. As you can see, I have a QThreadStorage<unsigned int> which behave as expected. Then I have some tests that use a TcpSocket to connect to a server. When tests are finished the QCoreApplication stop and do some cleanup. During this cleanup the QThreadStorage got deleted but for some reason it is not destructed by the right destructor. It is previously static_cast as a QNetworkAccessCache which is probably bigger than my unsigned int, thus a segfault arrive.
The Logger class comes from a first shared library (named A) that contains the QThreadStorage<unsigned int> as a static variable. A second shared library do some Network stuff and is linked against A, Qt6Core and Qt6Network.
The QThreadStorage<unsigned int> is a static variable living in the A library and used before main and thus QCoreApplication creation.
The same code execute well on a Windows platform and on a Linux platform using Qt 5.12.12. It also fails on a QNX computer with Qt 6.2.4
(gdb) watch *0x55555561a3b0 Hardware watchpoint 1: *0x55555561a3b0 (gdb) r Starting program: tests/Test_****/bin/Debug/Test_**** [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Hardware watchpoint 1: *0x55555561a3b0Old value = <unreadable> New value = -147850272 _int_malloc (av=av@entry=0x7ffff72ffb80 <main_arena>, bytes=bytes@entry=24) at malloc.c:3767 3767 malloc.c: No such file or directory. (gdb) c Continuing. Hardware watchpoint 1: *0x55555561a3b0 Old value = -147850272 New value = 0 0x00007ffff7cdacf2 in qThreadStorage_localData<unsigned int> (d=...) at /home/it/Qt/6.2.4/gcc_64/include/QtCore/qthreadstorage.h:100 100 if (!v) v = d.set(new T()); (gdb) c Continuing. Hardware watchpoint 1: *0x55555561a3b0 Old value = 0 New value = 1 Logger::process (this=0x555555617c30, p_message=...) at ****/source/log/Logger.cpp:25 25 ****/source/log/Logger.cpp: No such file or directory. (gdb) c Continuing. Hardware watchpoint 1: *0x55555561a3b0 Old value = 1 New value = 0 0x00007ffff7cd980f in Logger::process (this=0x555555617c30, p_message=...) at ****/source/log/Logger.cpp:55 55 in ****/source/log/Logger.cpp (gdb) c Continuing. ********* Start testing of Test_**** ********* Config: Using QtTest library 6.2.4, Qt 6.2.4 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 10.3.1 20210422 (Red Hat 10.3.1-1)), ubuntu 20.04 … PASS : Test_****::cleanupTestCase() Totals: 146 passed, 0 failed, 0 skipped, 0 blacklisted, 9ms ********* Finished testing of Test_**** ********* Program received signal SIGSEGV, Segmentation fault. 0x00007ffff705a558 in qThreadStorage_deleteData<QNetworkAccessCache> (d=0x55555561a3b0) at /home/qt/work/qt/qtbase/include/QtCore/../../src/corelib/thread/qthreadstorage.h:134 134 /home/qt/work/qt/qtbase/include/QtCore/../../src/corelib/thread/qthreadstorage.h: No such file or directory. (gdb) bt #0 0x00007ffff705a558 in qThreadStorage_deleteData<QNetworkAccessCache> (d=0x55555561a3b0) at /home/qt/work/qt/qtbase/include/QtCore/../../src/corelib/thread/qthreadstorage.h:134 #1 QThreadStorage<QNetworkAccessCache*>::deleteData (x=0x55555561a3b0) at /home/qt/work/qt/qtbase/include/QtCore/../../src/corelib/thread/qthreadstorage.h:135 #2 0x00007ffff77f31f0 in QThreadStorageData::finish (p=p@entry=0x555555617970) at /home/qt/work/qt/qtbase/src/corelib/thread/qthreadstorage.cpp:200 #3 0x00007ffff766582d in QCoreApplicationPrivate::cleanupThreadData (this=this@entry=0x55555561a270) at /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:503 #4 0x00007ffff766599a in QCoreApplicationPrivate::~QCoreApplicationPrivate (this=0x55555561a270, __in_chrg=<optimized out>) at /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:486 #5 0x00007ffff7665aa9 in QCoreApplicationPrivate::~QCoreApplicationPrivate (this=0x55555561a270, __in_chrg=<optimized out>) at /home/qt/work/qt/qtbase/src/corelib/kernel/qcoreapplication.cpp:483 #6 0x00005555555d8661 in main (argc=1, argv=0x7fffffffe398) at tests/Test_****/Test_****.cpp:1837