Visual Studio native debugger extension to help debug native applications using Mono.


Unity Mixed Callstack

UnityMixedCallstack is a Visual Studio 2017/2019 extension to help debug native applications embedding Mono, like Unity.

If you are using Visual Studio 2015 then you will need to grab one of the older releases of UnityMixedCallstack

Mono doesn't generate debug symbols that Visual Studio understands for jitted functions.

As a result, Visual Studio can not show anything meaningful for managed stack frames.

This fork of PmipMyCallstack has been developed for developers at unity-technologies and support has been added to our clone of mono, which can be found here

This version requires you to set the UNITY_MIXED_CALLSTACK environment variable before launching visual studio and before launching Unity (or using our mono standalone), which will tell the mono runtime to write out each jit'd function to a file.

The original PmipMyCallstack plugin created by JB Evain would call the function mono_pmip on every frame that doesn't belong to a module to show a meaningful representation of the stack frame and display it natively in the call stack window. This plugin does the same thing, but instead of calling over ipc, mono writes a file with the jit information and we lookup the IP from that. This allows us to open much larger callstacks, and many frames without visual studio hanging for a long time (an issue since Unity has so many threads).

In this version we also display the module the managed code belongs to. This gives you a nice callstack to look at in visual studio.

Remember, you need to disable Just My Code in the debugger options (Debug -> Options...) to expand the [External Code] entry in the callstack.


Before Unity Mixed Callstack


After Unity Mixed Callstack

  • Could this approach also work with Windows Performance Analyzer?

    Could this approach also work with Windows Performance Analyzer?

    Right now it's impossible to view Mono stack frames within a recorded WPR trace (they show up as ?!?, like the documentation says).

    Can this tool be extended to allow viewing them in Windows Performance Analyzer?

    opened by Holo-Krzysztof 3
  • Version 2.7 breaks compatibility with Visual Studio 2019

    Version 2.7 breaks compatibility with Visual Studio 2019

    The latest Version 2.7 which introduces support for VS 2022 cannot be installed on previous versions.

    With only 2019 installed, it gives this error:

    VSIXInstaller.NoApplicableSKUsException: This extension is not installable on any currently installed products.

    opened by akerfoot 2
  • Fix parsing of version field when decimal separator is not

    Fix parsing of version field when decimal separator is not "."

    This should fix an issue where pmip file parsing fails if your system is configured with a decimal separator that is not .. On my system I had , set as the decimal separator (default for danish region setting) and managed addresses were not translated but as soon as I set it to . it started working.

    This is mostly a speculative fix since I'm not actually sure how to build/package the extension in order to load it into VS so I haven't tested it beyond trying to parse some different version numbers with different decimal separators configured.

    opened by salvadorj 2
  • Add support for Visual Studio 2022.

    Add support for Visual Studio 2022.

    Added initial support for Visual Studio 2022. Tested with recent trunk with both 2019 and 2022.

    2 things that may need cleanup :

    1. Getting Visual Studio path seems a bit tricky. Used my local path for now.
    2. VSIX Manifest needs comment/uncomment depending on version building for.
    opened by venkify 1
  • bump version to 2.6

    bump version to 2.6

    Need to bump extension version after landing fix:

    opened by UnityAlex 0
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