GetTickCount
Created the Monday 18 March 2019. Updated 1 year ago.
This is typical timing function which is used to measure time needed to execute some function/instruction set. If the difference is more than fixed threshold, the process exits.
GetTickCount
reads from the KUSER_SHARED_DATA
page. This page is mapped read-only into the user mode range of the virtual address and read-write in the kernel range. The system clock tick updates the system time, which is stored directly in this page.
ZwGetTickCount
is used the same way as GetTickCount
. Using KiGetTickCount
is faster than calling ZwGetTickCount
, but slightly slower than reading from the KUSER_SHARED_DATA
page directly.
Technique Tag
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