CLRMD floods logs with EnumerateStackRoots found an entry with Object == 0, addr:73664ff040 srcType:0 while enumerating root paths for core dump created under linux

[koepalex]

Description

I updated the Microsoft.Diagnostics.Runtime from 3.0.0-beta.23214.4 to 3.1.456101 and the following code:

var dataTarget = DataTarget.LoadDump(pathToDump);
var runtime = dataTarget.ClrVersions.Single().CreateRuntime();
var heap = runtime.Heap;
var gcRootForX = new GCRoot(
                            heap,
                            objectInstancesToLookup);
foreach ((var root, var path) in gcRootForX.EnumerateRootPaths(cancellationToken))
{
    // ...
}

it spams the console with log messages like:

EnumerateStackRoots found an entry with Object == 0, addr:73664fefe0 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664fefe8 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664feff0 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff000 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff008 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff018 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff020 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff028 srcType:0
EnumerateStackRoots found an entry with Object == 0, addr:73664ff030 srcType:0

I'm not sure what to do with this information, and it bloats my console output.

So my questions are:

• What can cause such an issue? (Is this related to the different stack handling under linux, see CLRMD don't provide StackBase and StackLimit for full memory dumps #4198)
• Would it be possible to get an additional parameter bool traceErrors like EnumerateStackTrace has internally?

Configuration

• Is this related to a specific tool? no
• What OS and version, and what distro if applicable? Win11
• What is the architecture (x64, x86, ARM, ARM64)? x64
• Do you know whether it is specific to that configuration?
• Are you running in any particular type of environment? (e.g. Containers, a cloud scenario, app you are trying to target is a different user) net7.0-windows console application
• Is it a self-contained published application? no

Regression?

Not really, the error log seems to be added.

Other information

[mikem8361]

This is an issue in CLRMD which is in the https://github.com/Microsoft/clrmd. Assigning to Lee.

[leculver]

This should already be fixed in ClrMD. If the diagnostics team is still picking up daily builds then the fix is already in the diagnostics repo, it's just waiting for a release.

[leculver]

Oh, this is about ClrMD specifically. Yes it's fixed in our devbranch. I'll push a new build to NuGet tomorrow.