When the results xml is large, and we are writing the base64
representation in one line, `node` can exit before all the output gets
flushed out. This results in xharness getting an incomplete
`STARTRESULTXML <len> <base64> ... ` with missing `ENDRESULTXML`, thus
no `testResults.xml` is generated.

This can be seen in the case of `Microsoft.Extensions.Primitives.Tests`
which has xml ~140KB, and `System.Memory.Tests` which has a xml ~13MB.

So, wait for the two streams to be flushed out, with a timeout of 3secs.

- use the `drain` event only if `stream.write('')` returns `false`
* Address review feedback @kg, @maraf

Add basic testing infrastructure in NativeAOT (port from dotnet/linker)

- Port the Mono.Linker.Tests* projects from dotnet/linker
- Add the new projects to .editorconfig so they remain under the dotnet/linker format instead of dotnet/runtime
- clr.toolstests subset now runs the Mono.Linker.Tests infrastructure
- Make DisplayNameHelpers a public class so it can be used by the test infrastructure
- Add a couple of simple test cases (Dataflow and Requires) along with a Repro test, just like the repro project the repro test serves prototyping purposes
- Adds ProducedBy.NativeAOT to be able to represent differences between dotnet/linker and NativeAOT (either because of a bug or because NativeAOT correctly produces additional warnings)
- Use MSBuild properties instead of trying to figure out with linker paths

[main] Update dependencies from dotnet/linker

* Add a test

* Fix the issue

* Modify thread pool thread counting to be a bit more defensive

- An unexpected underflow in one or more thread counts can lead to a large number of threads to be created continually
- Prevented underflows in changes to thread counts, such that following an unexpected underflow, subsequent paired increments and decrements would avoid repeating the underflow
- Verified by creating an unexpected underflow in the debugger

The new `Threading*` CI jobs on `runtime-wasm` use `shouldContinueOnError: false` because the tests are known to be unstable right now. But they were not getting correctly forwarded to the base templates.

Merging. Thanks @SteveDunn for your contribution.

* Update dependencies from https://github.com/dotnet/arcade build 20220519.3

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22269.3

* Update dependencies from https://github.com/dotnet/arcade build 20220523.1

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22273.1

* Update dependencies from https://github.com/dotnet/arcade build 20220524.3

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22274.3

* Update dependencies from https://github.com/dotnet/arcade build 20220524.7

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22274.7

* Update dependencies from https://github.com/dotnet/arcade build 20220525.1

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22275.1

* Update dependencies from https://github.com/dotnet/arcade build 20220525.2

Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.ApiCompat , Microsoft.DotNet.XUnitExtensions , Microsoft.DotNet.GenAPI , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.GenFacades , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.Helix.Sdk
 From Version 2.5.1-beta.22255.2 -> To Version 2.5.1-beta.22275.2

* Update dependencies from https://github.com/dotnet/arcade build 20220526.1

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22276.1

* Update dependencies from https://github.com/dotnet/arcade build 20220530.2

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22280.2

* Update dependencies from https://github.com/dotnet/arcade build 20220531.1

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22281.1

* Update dependencies from https://github.com/dotnet/arcade build 20220601.2

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22301.2

* Update dependencies from https://github.com/dotnet/arcade build 20220606.1

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22306.1

* Update dependencies from https://github.com/dotnet/arcade build 20220606.2

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22306.2

* Update dependencies from https://github.com/dotnet/arcade build 20220608.5

Microsoft.DotNet.ApiCompat , Microsoft.DotNet.Arcade.Sdk , Microsoft.DotNet.Build.Tasks.Archives , Microsoft.DotNet.Build.Tasks.Feed , Microsoft.DotNet.Build.Tasks.Installers , Microsoft.DotNet.Build.Tasks.Packaging , Microsoft.DotNet.Build.Tasks.TargetFramework , Microsoft.DotNet.Build.Tasks.Templating , Microsoft.DotNet.Build.Tasks.Workloads , Microsoft.DotNet.CodeAnalysis , Microsoft.DotNet.GenAPI , Microsoft.DotNet.GenFacades , Microsoft.DotNet.Helix.Sdk , Microsoft.DotNet.PackageTesting , Microsoft.DotNet.RemoteExecutor , Microsoft.DotNet.SharedFramework.Sdk , Microsoft.DotNet.VersionTools.Tasks , Microsoft.DotNet.XUnitConsoleRunner , Microsoft.DotNet.XUnitExtensions
 From Version 7.0.0-beta.22255.2 -> To Version 7.0.0-beta.22308.5
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
Co-authored-by: NPremek Vysoky <premek.vysoky@microsoft.com>
Co-authored-by: NLarry Ewing <lewing@microsoft.com>

* Fix Crossgen2 PDB generator

During my perf investigation work I have found out that PDB emitter
in Crossgen2 is broken. I tracked this down to the change

https://github.com/dotnet/runtime/commit/fdf6485c800ec580656d7491795e10881d493afb#diff-24e48862e3b82f52e7fa04f22700b1c976a012bfeb08a246406f4e5ec579699b

that caused two behavioral changes in the PDB emitter:

1) The logic around QueryPDBNameEx got refactored to use a char[]
instead of a StringBuilder and that silently caused _pdbFilePath
to be set to the string "System.Char[]" instead of the actual path
(cf PdbWriter.cs#221 in the quoted commit).

2) The COM wrapper refactoring ended up bumping the refcount
on the _ngenWriter by one so that it never got actually closed
and properly flushed; due to this the resulting PDB was invalid.

Thanks

Tomas

VN was retaining the precise handle types when applying arithmetic
operations to handles. This meant that we could not rely on handles of
types like GTF_ICON_METHOD_HDL actually containing an embedded method
handle after constant propagation.

This change generalizes the handle type to GTF_ICON_CONST_PTR or
GTF_ICON_GLOBAL_PTR whenever VN does anything that semantically
"unassociates" the icon from the specialized handle type.

```
[06:37:05] fail: [FAIL] System.Diagnostics.Tests.StopwatchTests.DebuggerAttributesValid
[06:37:05] info: System.InvalidOperationException : Expected one DebuggerDisplayAttribute on System.Diagnostics.Stopwatch.
[06:37:05] info:    at System.Diagnostics.DebuggerAttributes.ValidateDebuggerDisplayReferences(Object obj)
[06:37:05] info:    at System.Diagnostics.Tests.StopwatchTests.DebuggerAttributesValid()
[06:37:05] info:    at System.Reflection.MethodInvoker.InterpretedInvoke(Object , Span`1 , BindingFlags )
```

Fixed by preserving the `DebuggerDisplayAttribute`.

.. `EnableAggressiveTrimming=true`, since the tests are not expected to
be trim-safe.

Based on @vitek-karas' suggestion.

* Enable nullable for Microsoft.Bcl.AsyncInterfaces

* Apply suggestions from code review
Co-authored-by: NEric Erhardt <eric.erhardt@microsoft.com>
Co-authored-by: NEric Erhardt <eric.erhardt@microsoft.com>

Some of the calls go through the trampoline infrastructure, which
cannot patch indirect calls made through GOT slots, causing crashes
in the MONO_ARCH_CODE_EXEC_ONLY case.

* Remove SAFEARRAY APIs from pal

* simple case works

* FEATURE_SUSPEND_REDIRECTION

* AVX support

* refactor

* no need for asm

* ARM64

* stub `IsSafePoint` on Unix

* revert unnecessary changes to RhpGcPoll2

* no copy of redirect context

* Specialcase active frames in EnumGcRefs

* remove bogus assert.

Fixes https://github.com/dotnet/runtime/issues/70302.

Issue: https://github.com/dotnet/runtime/issues/42646

* Guard FillVariant under FEATURE_COMINTEROP

* Guard COM exception information under FEATURE_COMINTEROP

* Remove TypeNameBuilder::ToString(BSTR)

* Remove the whole EECOMException type when COM interop is disabled

* Guard more ExceptionData usage under FEATURE_COMINTEROP

* Guard BSTRHolder under FEATURE_COMINTEROP

* Remove Unix BSTR simulation in palrt

* Add guard to COMException::GetMessage

* Remove some unnecessary regex NonBacktracking code

Move some debug-only code to #if DEBUG, remove other dead code, and clean up a few things that are unnecessary.  Also add a few tests to fill out some code coverage results, and address some style-related comments from a recently merged PR.

* Address PR feedback

* Fix non-deterministic threading-related failures in regex tests

If the wrong tests run concurrently, they can end up seeing a changed NFA safe limit from another test.

* Increase precision and safety of the NonVersionableAttribute
- NonVersionable now only unconditionally affects whether or not the IL is reported as inlined in the inlining data
- Primitive types are now implicitly considered to be NonVersionable
- Classes defined in CoreLib may now be considered to be NonVersionable
  - Classes now marked are String, RawData, and RawArrayData, which are all tied into intrinsics in crossgen2
- NFloat is now marked as NonVersionable so that some of its methods may actually be treated as NonVersionable
- There is now an additional predicate that the IL within the NonVersionable method must satisfy a series of tests to ensure that it can safely be inlined without adding additional tokens for the logic to depend on. See below for the details of the predicate

Collectively these changes make it so that even if we change our inlining rules, the NonVersionable marked methods will successfully pass through Crossgen, without generating requiring tokens from their original modules to be present in the final image.

The rules are:
                // 1. ldfld, ldflda, and stfld to instance fields of NonVersionable structs and NonVersionable classes
                // 2. cpobj, initobj, ldobj, stobj, ldelem, ldelema or sizeof, to NonVersionable structures, signature variables, pointers, function pointers, byrefs, classes, or arrays
                // 3. stelem, to NonVersionable structures
                // In addition, the method must not have any EH.
                // The method may only have locals which are NonVersionable structures, or classes

* Address code review feedback

This change adds two build-only lanes to `runtime` and two full build+test lanes to `runtime-wasm` that builds wasm with internal threads only (`WasmEnablePerfTracing`) and full threading (`WasmEnableThreads`).

The `runtime-wasm` additions can only be manually triggered at this time.
Co-authored-by: NAleksey Kliger (λgeek) <alklig@microsoft.com>
Co-authored-by: NAnkit Jain <radical@gmail.com>