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Why do you think the returned memory would be unaligned?

My question is not if the returned memory would be unaligned, but if we are taking pointers to random places of the chunk array. For instance, if we are doing anything isomorphic to this:

        data = (char *)malloc(16);
        sp1 = (short*)(data+3);

then we are doing it wrong. I am asking not because I think we are doing it wrong, but because i am still wrapping around the structure you have in mind for the chunks, because there is 3 or 4 layers of indirections, a "chunk struct" and at least 3 pointer accesses when pushin frames, so immediately I am wondering if this mechanism is taking this correctly.