Ivan Solovev c62c335be4 QSharedMemory: fix semaphore creation in legacy mode
The legacy mode was using the new nativeKey to create a semaphore.
As a result, on macOS the name of the semaphore key file was the same
as the name of the shared memory key file.
This lead to a situation when the file was mistakenly deleted when
destroying any instance of the shared memory, not only the one that
created it.
Fix it by using QSystemSemaphore::legacyNativeKey() in legacy mode.

Add a test to verify that we cannot re-create a shared memory with the
same key. The test was failing on macOS without the fix.

Fixes: QTBUG-111855
Change-Id: Ib0bc41791e889b1888bbb8aa9044c6b053b63a5a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 02c42b26e1ff94047657c4838128cb5b22d24d2b)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
2023-11-03 15:53:31 +00:00
2020-11-16 10:02:08 +02:00
2023-10-27 21:05:01 +00:00
2023-09-14 10:27:23 +03:00
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