DoStackSnapshot fails on .NET 10 when invoked from ELT hook

[acizmarik]

Description

While implementing new feature for profiler I noticed a bug - DoStackSnapshot works within ELT hook for .NET 8 and .NET 9 but fails on .NET 10 with E_FAIL (0x80004005)

Reproduction Steps

1. Profiler with ELT hooks that calls DoStackSnapshot
2. Run profiler with program whose TargetFramework is set to net8.0 and net9.0 - this should work fine
3. Run profiler with program whose TargetFramework is set to net10.0 - this fails

Expected behavior

It should work on .NET 10 in the same way as for previous versions

Actual behavior

Fails for .NET 10, works for previous versions

Regression?

Yes

Known Workarounds

I made a quick test to unwind the native top frame using _Unwind_Backtrace. After that the DoStackSnapshot succeeds

Configuration

• .NET:

8.0.128 [/usr/lib/dotnet/sdk]
9.0.118 [/usr/lib/dotnet/sdk]
10.0.109 [/usr/lib/dotnet/sdk]

• OS

Linux version 6.17.0-40-generic (buildd@lcy02-amd64-101) (x86_64-linux-gnu-gcc (Ubuntu 15.2.0-4ubuntu4) 15.2.0, GNU ld (GNU Binutils for Ubuntu) 2.45) #40-Ubuntu SMP PREEMPT_DYNAMIC Fri Jun 19 16:42:13 UTC 2026

• Architecture
  • x64
  • Though I don't think that these things are specific to my configuration / environment

Other information

I believe that this issue originates here: #107152. I am aware of the announced change that some APIs that were previously unsafe to call from hooks now return CORPROF_E_UNSUPPORTED_CALL_SEQUENCE. But I believe the issue I described here is different

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