.NET Debugging Demos
This is a series of debugging demos aimed to help you get some hands on experience in debugging the most common types of Hang/performance, memory and crash scenarios in .net applications.
The demos are written in ASP.NET which means that you do need IIS and .net framework 2.0 installed on the development machine where you install the demos.
Each new demo will have a set of instructions on how to get started but the lab instructions are deliberately kept very brief in order to give you the most chance to explore on your own. Hints will be available for each demo in case you get stuck.
New demos will be published on http://blogs.msdn.com/Tess as time permits (I am planning to release one new lab per week).
All demos will use the same web site so there is only one application to install for all demos.
Note: These demos will cause high CPU usage, high memory consumption and crashes, so make sure that you are only installing these demos on development machines where no one else will be bothered by the system hanging or the web server crashing.
1. Download the demo site (attached to this post) and unzip the files to a folder on your harddrive. (Rev: just uploaded a new version that shouldn't require 3.5)
2. Set up a new virtual directory in IIS called BuggyBits
3. Browse to the default site http://localhost/BuggyBits/default.htm to make sure that you set up the vdir correctly.
4. Browse to the Company info site http://localhost/BuggyBits/CompanyInformation.aspx to make sure that you can view aspx pages correctly.
5. Download and install the debugging tools for windows from http://www.microsoft.com/whdc/devtools/debugging/default.mspx
6. Run the InternetConnections.reg file by double-clicking it to change the number of outgoing connections you can make to the same site in Internet Explorer (note: any registry modification are done at your own risk, if you feel uncomfortable with this you can view the regfile in notepad and make the changes manually)
7. Install tinyget (comes with the IIS6.0 resource kit http://support.microsoft.com/kb/840671 ) we will be using this for stressing some of the pages in order to produce hangs and memory leaks.
Terminology and tools
Each demo/lab will assume that you are familiar with the following:
.symfix c:\mycache .reload
where c:\mycache is where it will store the local copies of the cached symbols. If you choose to save workspace information when asked in windbg, this symbol path will be saved for the next debugging session.
Some familiarity with the sos commands and windbg is also useful. The following articles may be useful to use as reference material:
Getting started - Part I
Getting started - Part II
While executing !CLRStack command in WINDBG it shows
error : OS Thread Id: 0x5d50 (0)
Unable to walk the managed stack. The current thread is likely not a managed thread. You can run !threads to get a list of managed threads in
I have .net 4 framework and i am usng psscor 4.
Please suggest a resolution.
Tinyget is not available in windows 7 platform because IIS 6.0 Resource Kit is not available for the platform. Is there any other application can be used for same purpose?
Thanks Tess for all your blog posts. I was able to solve many performance issue with our application.
Good luck with your new adventures.