_HEAP_VS_CHUNK_HEADER_SIZE

Metadatacopy
union _HEAP_VS_CHUNK_HEADER_SIZE {
    struct {
        unsigned short MemoryCost;/* 0x0  2 */
        unsigned short UnsafeSize;/* 0x2  2 */
        unsigned short UnsafePrevSize;/* 0x4  2 */
        unsigned char Allocated;/* 0x6  1 */
        unsigned char Spare0;/* 0x7  1 */
    };/* 0x0  8 */
    unsigned short KeyUShort;/* 0x0  2 */
    unsigned long KeyULong;/* 0x0  4 */
    unsigned __int64 HeaderBits;/* 0x0  8 */
};