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Fix possible undefined behavior in clear_thread_data

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Fix possible undefined behavior in clear_thread_data.
The key used in pthread_setspecific must be obtained
from pthread_key_create or undefined behavior occurs.
Use set_thread_data to clear it since it ensures that
the key has been obtained using pthread_key_create
by calling pthread_once using
create_current_thread_data_key.
Fixes crash when closing threaded qt apps on NetBSD.

Pick-to: 5.15 6.2 6.3 6.4
Change-Id: I1c7d2628f4248e00a12724a952568f7d92011986
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Niclas Rosenvik 2022-07-14 18:35:01 +02:00 committed by Thiago Macieira
parent 619cb795b2
commit 6d93053303
1 changed files with 1 additions and 2 deletions
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3
src/corelib/thread/qthread_unix.cpp
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@ -137,8 +137,7 @@ static void set_thread_data(QThreadData *data)
static void clear_thread_data()
{
currentThreadData = nullptr;
pthread_setspecific(current_thread_data_key, nullptr);
set_thread_data(nullptr);
}
template <typename T>