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July 8, 2012

Tracing access to stack memory

In the previous post I wrote about a concept to intercept when arbitrary region of the memory is being accessed.

Below is an example output of the Windbg extension. I set it to monitor when the stack memory of the current thread (Address: 18d000 Size: 3000) is being accessed, and to break in when there is a call to other module (Break reason: 2).

In the log you can see the address where the memory access occurred and the instruction caused the memory access. Also, you can see the address of the data being accessed, and the type of the data access (R for read, W for write).

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