Using Pykd with SOS

Question

I wanted to do the following in PyKd: execute a command of another extension and process its output.

First of all, it seems I have to load SOS in PyKd, not in WinDbg. I did this with

>>> print(loadExt("C:\Windows\Microsoft.NET\Framework64\v2.0.50727\sos.dll"))
59323328

Next I wanted to perform a call on the extension like this:

>>> print(callExt(59323328, "!dumpheap -stat", ""))

(The third paramter is not documented in API.)

However, it gives me the error

The call to LoadLibrary(C:\Windows\Microsoft.NET\Framework64\2.0.50727\sos.dll) failed
Win32 error 0n126
"The module could not be found."
Please check your debugger configuration and/or network access.

I'm doing all this within a !pycmd command prompt.

How can I call SOS commands from PyKd and process the output?

Versions:

WinDbg 9.2.9200.16384 x64
debugging a 64 bit application
Pykd 0.2.0.26 64 bit
Python 2.7.3

score 2 · Accepted Answer · edited Jan 13 '14 at 08:01

2

You can use a python sugar:

loadExt(r"C:\Windows\Microsoft.NET\Framework64\v2.0.50727\sos.dll")

About output length see the pykd issue tracker, I've posted a comment.

edited Jan 13 '14 at 08:01

Thomas Weller

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answered Jan 13 '14 at 07:24

pykd team

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score 1 · Answer 2 · answered Jan 11 '14 at 22:06

1

Stupid mistake, I should escape paths like this:

>>> print(loadExt("C:\\Windows\\Microsoft.NET\\Framework64\\v2.0.50727\\sos.dll"))

answered Jan 11 '14 at 22:06

Thomas Weller

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Using Pykd with SOS

2 Answers2