This will expose the. NET debugging commands that are required to run the analysis. What is SOS? According to the official documentation , SOS is a debugger extension that enables a developer to inspect the managed state of a. NET Core and other. NET-based applications such as. NET Windows Forms. The following screenshot shows the result of a successful installation.
Notice that the dotnet-sos tool has configured the lldb debugger so that the SOS extension should be loaded automatically when the debugger starts. This is usually dotnet, unless the application is self-contained.
If this is a self-contained application, then this variable is the name of the application without the. The first command that you should run inside the debugger is to set the symbol server path to the directory that you set for the symbol downloads:. There are several lldb commands. You can list these by using the help command.
In the list, you can see that the SOS commands are also listed under user defined commands. SOS is a plugin for lldb. You can retrieve plugin help information by using the same help command. To begin, look at the thread's native call stack by using the bt "back trace" command. This command shows the call stack of the active thread. You should not be able to retrieve any information. The stack walk will fail because the reported stack is incomplete. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. This article discusses the installation of ProcDump tool and how to capture. If you have followed the previous parts of this series, you should have the following setup ready to go:. NET Core apps. In the previous labs, you learned how to analyze a crash or performance problem.
You used the createdump tool to capture dump files. Now, you'll install ProcDump, and capture core dump files by using ProcDump. That will be the extent of this lab because you'll work in the same scenario that you investigated in the previous part. The Linux version has some limitations when compared with the Windows version. It doesn't support every feature that the Windows version of the tool offers. You can investigate the object's properties by passing that address to the dumpobj command.
This will list the properties of that object. In this example, run dumpobj fc to examine the object's properties. You're investigating a System. This is an object of the System. Uri type. You want to determine the URI. Copy the address of the System.
Uri object, and investigate it by using dumpobj again. Run dumpobj fbfbb8. The address of the object in the memory dump file that you generated will most certainly be different.
Run dumpobj fbfb The result is listed in the following screenshot. As the name suggests, this is probably not an existing page within the application. At this point, you should probably have more questions about what caused the crash.
For example, why was the crash triggered after you selected the Slow link? Feel free to continue investigation by yourself.
The next suggested step you could take would be to run the gcroot command by using the HttpWebRequest object address to find out where it is rooted. This might help you develop a picture of how the crash occurred. This concludes the lab. Lab 2. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info.
Contents Exit focus mode. Lab 1. Please rate your experience Yes No. Any additional feedback? Note If you have previously opened a dump file and worked with lldb, you have already set up symbols and installed SOS. Note If we open a crash dump file in WinDbg on Windows, WinDbg would directly select the thread that caused the crash.
Note You're investigating a System. Craig Peru Eli United States Robin France Jason United States Robert United States Ogden France Moore United States Mortimer United States Kennedy Australia Levi Canada Barrette Canada Christian Canada
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