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  1. Qt
  2. QTBUG-19693

SIGBUS in QDeclarativeVMEVariant::setValue

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    Description

      SIGBUS occured when QML application compiled by gcc for MIPS executed.

      Detail:

      src/declarative/qml/qdeclarativevmemetaobject.cpp
      
private:
    int type;
    void *data[4]; // Large enough to hold all types

    inline void cleanup();
};

      QDeclarativeVMEVariant::data member is 4 byte alignment by gcc for MIPS,
      but this member is required 8 byte alignment.

      for example

      void QDeclarativeVMEVariant::setValue(double v)
{
    if (type != QMetaType::Double) {
        cleanup();
        type = QMetaType::Double;
    }
    *(double *)(dataPtr()) = v;
}

      To resolve this problem , coding for gcc

      private:
    int type;
    void *data[4] __attribute__((aligned(8))); // Large enough to hold all types

    inline void cleanup();
};

      I have no idea for other compilers.

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            aakenned Aaron Kennedy
            kacky Takaya Kakizaki
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              Created:
              Updated:
              Resolved:

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