_HEAP_LARGE_ALLOC_DATA

Metadatacopy
struct _HEAP_LARGE_ALLOC_DATA {
    struct _RTL_BALANCED_NODE TreeNode;/* 0x0  12 */
    union {
        unsigned long VirtualAddress;/* 0xc  4 */
        unsigned long UnusedBytes : 16;/* 0xc:0  4 */
    };/* 0xc  4 */
    unsigned long ExtraPresent : 1;/* 0x10:0  4 */
    unsigned long GuardPageCount : 1;/* 0x10:1  4 */
    unsigned long GuardPageAlignment : 6;/* 0x10:2  4 */
    unsigned long Spare : 4;/* 0x10:8  4 */
    unsigned long AllocatedPages : 20;/* 0x10:12  4 */
};