Software Diagnostics Library

Now we propose the next group of general patterns related to memory regions (the terminology was partially influenced from topology). The first one we call Memory Region, for example:

1: kd> dp fffff88005875000 fffff88005875010
fffff880`05875000  039b5000`6e696268 00000000`00002000
fffff880`05875010  00000000`00000000

There are Open and Closed memory regions. We can extend the former ones in one or both directions:

1: kd> dp fffff88005875000-10 fffff88005875010+10
fffff880`05874ff0  6ab90c4f`039ba1b8 039b8050`fffffff8
fffff880`05875000  039b5000`6e696268 00000000`00002000
fffff880`05875010  00000000`00000000 00000000`00000000
fffff880`05875020  00000294`ffffffd0

The closed regions cannot be read past its boundary, like this kernel stack region [fffff880`05874000 fffff8800587d000):

1: kd> dp fffff88005874000-30
fffff880`05873fd0  ????????`???????? ????????`????????
fffff880`05873fe0  ????????`???????? ????????`????????
fffff880`05873ff0  ????????`???????? ????????`????????
fffff880`05874000  039ba000`6e696268 00000000`00001000
fffff880`05874010  00000000`00000000 00000000`00000000
fffff880`05874020  00206b6e`ffffffa8 01cae7bd`b8aca323
fffff880`05874030  039b6698`00000000 00000000`00000001
fffff880`05874040  ffffffff`039bafe8 039b6710`00000004

1: kd> dp fffff8800587d000-30
fffff880`0587cfd0  00000000`00000000 00000000`00000000
fffff880`0587cfe0  00000000`00000000 00000000`00000000
fffff880`0587cff0  00000000`00000000 00000000`00000000
fffff880`0587d000  ????????`???????? ????????`????????
fffff880`0587d010  ????????`???????? ????????`????????
fffff880`0587d020  ????????`???????? ????????`????????
fffff880`0587d030  ????????`???????? ????????`????????
fffff880`0587d040  ????????`???????? ????????`????????

- Dmitry Vostokov @ DumpAnalysis.org + TraceAnalysis.org -

This entry was posted on Friday, October 1st, 2010 at 1:14 pm and is filed under Crash Dump Analysis, Debugging, Mathematics of Debugging, Memoretics, Memory Analysis Forensics and Intelligence, Structural Memory Patterns. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.