Use WinDbg to Write Contents of Managed Byte[] to File

Question

I have a crash dump from a production server that shows an OutOfMemoryException. The exception itself is not relevant here.

I happened to run a !dso to view the sta

Answer 1

This is what worked for me:

.foreach($str {!DumpHeap /d -mt 00007ff890e96948 -min 0n126500 -short}){r@$t0=  dwo(${$str}+8)*2;.writemem e:\temp\str\${$str}.txt ${$str}+c L? @$t0} 

Answer 2

The L modifier for ranges is limited in size. If you want to get around the limit use the L? range modifier. The following command worked for me:

0:000> !do 0x04cc1000
Name:        System.Byte[]
MethodTable: 68374944
EEClass:     680aaf1c
Size:        67108876(0x400000c) bytes
Array:       Rank 1, Number of elements 67108864, Type Byte
Element Type:System.Byte
Content:     ................................................................................................................................
Fields:
None
0:000> .writemem c:\temp\array.bin 0x04cc1000 L?0x400000c
Writing 400000c bytes