Martin Kulov's Blog

VSTS, Oslo, INETA, ASP.NET, Debugging .NET Applications, Tips and Tricks

March 29, 2009

Breakpoints in multithreaded applications

There are known problems in Visual Studio 2008 SP1 related to breakpoints and debugging experience with multithreaded applications. Since these days almost everything that you write is multithreaded app, I would recommend you to install the hotfix from MSDN Code Gallery.

Here are the possible symptoms:

Breakpoints in parallelized loops are eventually ignored after multiple hits
Stopping and starting threads causes breakpoints to be missed
Visual Studio may crash when you debug multiple processes at the same time
Stepping over a disabled breakpoint when you debug a native application turns into a "go"
Stepping when you debug a managed multithreaded application can randomly turn into a "go"
Visual Studio crashes when you use the "Step Into" command to start an MPI program
Running the "Step Over" command while you are debugging multiple processes causes a deadlock
Disabled breakpoints are not visible after you install Visual Studio 2008 Service Pack 1

Labels: Debugging, Tools and Tips

# posted by Martin Kulov @ 4:37 AM

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