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  1. Qt
  2. QTBUG-100511

windows: QLocalSocket can emit readyRead() after disonnected()

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Details

    • Windows
    • 27a6938cb4 (qt/tqtc-qtbase/5.15)

    Description

      There is a possibility that readyRead() is emitted after disconnected(). When another application sends a message and disconnects right after:

      1) QWindowsPipeReader::notified is called with errorCode = ERROR_SUCCESS and numberOfBytesRead with the size of the final message
      2) Still inside QWindowsPipeReader::notified, QWindowsPipeReader::startAsyncRead is called, which calls QWindowsPipeReader::checkPipeState, it emits pipeClosed() which is queued
      3) Still inside QWindowsPipeReader::notified, it emits _q_queueReadyRead() which is queued
      4) After the event loop returns, _q_pipeClosed() then causes disconnected () be emitted, and emitPendingReadyRead() causes readyRead() to be called.

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            manordheim Mårten Nordheim
            poikelin Joni Poikelin
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              Updated:
              Resolved:

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