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lang-c
private(top)doesn't make the object pointed bytopprivate but rather the pointer itself. Each thread ends up with an uninitialised private pointer and any attempt to dereference such a pointer with->ends up in a segmentation fault. How about you move theVaes_cipher_top* top = new Vaes_cipher_top;statement inside the parallel loop? Some variables look like they too need theprivatetreatment. Also, each thread executes the samewhileloop and the work is not distributed among the threads. Are you testing ifVaes_cipher_topis thread-safe?newstatement inside the parallel region but left the definition oftopoutside and it is still shared.