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  1. Qt
  2. QTBUG-135646

destroy_current_thread_data Segmentation fault

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Details

    • Bug
    • Resolution: Duplicate
    • Not Evaluated
    • None
    • 6.9.0
    • Core: Threads
    • None
    • Windows

    Description

      I'm seeing crashes with Qt 6.9.0 using mingw-w64 12.0.0 and gcc 14.2.0 with pthreads.
      It seems like destroy_current_thread_data is called with null from the Cleanup dtor when currentThreadData is null because the null check in set_thread_data is for data, not currentThreadData: https://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/thread/qthread_win.cpp?h=6.9.0#n83

      [Thread 19624.0x11648 exited with code 0]
Thread 24 "Thread (pooled)" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 19624.0x39bc]
destroy_current_thread_data (p=0x0) at ../qtbase-everywhere-src-6.9.0/src/corelib/thread/qthread_win.cpp:55
warning: 55     ../qtbase-everywhere-src-6.9.0/src/corelib/thread/qthread_win.cpp: No such file or directory
(gdb) bt
#0  destroy_current_thread_data (p=0x0) at ../qtbase-everywhere-src-6.9.0/src/corelib/thread/qthread_win.cpp:55
#1  0x00007ff8b002cdf4 in Cleanup::~Cleanup (this=<optimized out>, __in_chrg=<optimized out>) at ../qtbase-everywhere-src-6.9.0/src/corelib/thread/qthread_win.cpp:85
#2  0x00007ff943f30029 in ?? () from C:\Program Files\Strawberry Music Player Debug\libstdc++-6.dll
#3  0x00007ff966934ac7 in ?? () from C:\Program Files\Strawberry Music Player Debug\libwinpthread-1.dll
#4  0x00007ff966934d32 in ?? () from C:\Program Files\Strawberry Music Player Debug\libwinpthread-1.dll
#5  0x00007ff9821e9a1d in ntdll!RtlActivateActivationContextUnsafeFast () from C:\Windows\SYSTEM32\ntdll.dll
#6  0x00007ff9821e9aff in ntdll!RtlActivateActivationContextUnsafeFast () from C:\Windows\SYSTEM32\ntdll.dll
#7  0x00007ff9821e75a3 in ntdll!LdrShutdownThread () from C:\Windows\SYSTEM32\ntdll.dll
#8  0x00007ff98221ec6e in ntdll!RtlExitUserThread () from C:\Windows\SYSTEM32\ntdll.dll
#9  0x00007ff981e3737d in KERNEL32!BaseThreadInitThunk () from C:\Windows\System32\kernel32.dll
#10 0x00007ff98221cc91 in ntdll!RtlUserThreadStart () from C:\Windows\SYSTEM32\ntdll.dll
#11 0x0000000000000000 in ?? ()

       

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-131892 QThread crash on thread-exit with adopted threads started by winpthreads

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
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              thiago Thiago Macieira
              jonaski Jonas Kvinge
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                Created:
                Updated:
                Resolved:

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