Dismayingly often, you get dumps like this:

mdb ~johnlev/core.libvirtd.100848
Loading modules: [ libc.so.1 ld.so.1 ]
> ::stack
libc.so.1`strcmp+0x90()
> 

I finally got round to adding ::dump support for making grubbing through
the stacks easier:

> <rsp,0x60::dump -S
7ffffec0fb28:  00007ffffe2c6c56 00007ffffe32f3f8
  7ffffec0fb28: libvirt.so.0.6.0`virEnumFromString+0x36
7ffffec0fb38:  00000000004ca9f0 0000000000000000
7ffffec0fb48:  00000000004cb948 00007ffffec0fb60
7ffffec0fb58:  00007ffffe2d3a2b 00007ffffec0fc00
  7ffffec0fb58: libvirt.so.0.6.0`virDomainGraphicsTypeFromString+0x1b
7ffffec0fb68:  00007ffffe305e34 00007ffffe332c30
  7ffffec0fb68: libvirt.so.0.6.0`xenDaemonParseSxprGraphicsNew+0xf4
7ffffec0fb78:  00007ffffe332c18 00007ffffe332c00

It's a trivial patch - do people think it's worth it, and any
preferences over the format?

regards
john

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