Fixes https://github.com/dotnet/runtime/issues/51109.

* Remove CSE ifdefs

`FEATURE_ANYCSE` and `FEATURE_VALNUM_CSE` are always enabled, and
are expected to remain so, so remove the ifdefs.

* Formatting

As specified in https://github.com/dotnet/runtime/issues/44654 the minimum iOS/tvOS version we're targeting for .NET 6 is iOS 10.
Bump the versions used in our build scripts and RID graph to that and also add iOS 14.

* Add IL Offset and Method Token to stacktrace

For easier debugging, if the PDB is not deployed, add the Method Token and IL Offset to the stacktrace.
This functionality can be turned on and off by environment setting "COMPlus_ILOffsetToStackTrace"

* Use LocalAppContextSwitch and HexConverter

Use LocalAppContextSwitch to get environment variable without using static constructor in StackTrace.
Also, use HexConverter to get metadata token and il offset without unnecessary complex.

* Use AppendFormat instead of HexConverter

Use AppendFormat() for formatting of the hex number.

* Use switch to activate ILOffset in stacktrace

- Change switch name from ILOffsetsToStackTrace to ShowILOffset
- Use "Switch.System.Diagnostics.StackTrace.ShowILOffsets" to activate ILOffset in stacktrace
- Use "DOTNET_" prefix for environment variable name (DOTNET_ILOffsetToStackTrace)

* Use AppContextConfigHelper for get switch value

* Add test case for ILOffsetToStackTrace

* Remove unused variable

* Use RemoteExecutor.Invoke for testing

* Update src/libraries/System.Private.CoreLib/src/System/LocalAppContextSwitches.cs
Co-authored-by: NNoah Falk <noahfalk@users.noreply.github.com>

* TC contents are added

* Remove setting code using enviornment variable

remove setting code using environment variable and change switch default value to true.

* code clean-up. remove unused code

* Sort using statements

* Skipt test in mono interpreter mode.

Related issue : https://github.com/dotnet/runtime/issues/51096Co-authored-by: NNoah Falk <noahfalk@users.noreply.github.com>

* Use nuget standardized properties

Requires https://github.com/dotnet/arcade/pull/7212. Helps with the pkgproj to csproj conversion.

* testing unicode roundtrip

* code review feedback

* fix Narrow No-Break Space

[main] Update dependencies from dotnet/runtime dotnet/runtime-assets

* implement IAsyncEnumerable JsonConverter

* Prototype of IAsyncEnumerable deserialize with Stream

* Use a Queue + test buffersizes

* Avoid 1 item lag

* Add support for Serialize

* Misc cleanup on test

* extend DeserializeAsyncEnumerable test coverage

also removes SerializeAsyncEnumerable components

* Update src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Collection/IAsyncEnumerableConverterFactory.cs
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* address feedback

* tweak test buffer values

* Update src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Collection/IAsyncEnumerableOfTConverter.cs
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* Update src/libraries/System.Text.Json/src/System/Text/Json/Serialization/Converters/Collection/IAsyncEnumerableOfTConverter.cs
Co-authored-by: NStephen Toub <stoub@microsoft.com>

* address feedback

* increase delayInterval in serialization tests

* address feedback

* address feedback

* add test on exceptional IAsyncDisposable disposal

* address feedback

* Update src/libraries/System.Text.Json/src/System/Text/Json/Serialization/ReadAsyncState.cs
Co-authored-by: NLayomi Akinrinade <layomia@gmail.com>

* Update src/libraries/System.Text.Json/src/System/Text/Json/Serialization/WriteStack.cs
Co-authored-by: NLayomi Akinrinade <layomia@gmail.com>

* fix build and remove dead code

* address feedback

* Revert unneeded JsonClassInfo.ElementType workaround

* remove state allocation on async deserialization methods

* remove tooling artifacts

* address feedback

* reset AsyncEnumeratorIsPendingCompletion field
Co-authored-by: NSteve Harter <steveharter@users.noreply.github.com>
Co-authored-by: NStephen Toub <stoub@microsoft.com>
Co-authored-by: NLayomi Akinrinade <layomia@gmail.com>

* make emsdk installation instructions clear on which version need to be installed

* whitespace

* Radek's feedback

* Print call stack when profile is enabled in a mono_llvm_cpp_throw_exception (void) this was asked by @jeromelaban

* Update src/mono/mono/mini/llvm-runtime.cpp
Co-authored-by: NJérôme Laban <jlaban@gmail.com>

* As suggested by @jeromelaban
Co-authored-by: NJérôme Laban <jlaban@gmail.com>

We previously only used this naming on platforms that already had coreclr as an option. Using Mono in the name all the time will make what runtime you're dealing with less ambiguous.

Fixes #49718

* Fix DispatchProxy not working with in parameters

* Correct typo
Co-authored-by: NChristopher Watford <christopher.watford@ge.com>

* Fixed Calling Convention

Removed unneeded mods
Co-authored-by: NChristopher Watford <christopher.watford@ge.com>

* Add ILLink annotations to Microsoft.CSharp

* apply PR feedback

* Apply PR feedback

* Fix missed comment

* apply pr feedback

Fixes: https://github.com/dotnet/runtime/issues/51007

Without setting found to true we lose the transformed calling
convention (StdcallMemberFunction) and we end up lying to JIT
that getSize is an unmanaged static function pointer so that
JIT doesn't emit proper code for passing the "this" pointer
to the PInvoke.

Thanks

Tomas

* Add internal String.{Try}CopyTo and use in a few places in corelib

We can use in more if it's made public.

* Apply suggestions from code review
Co-authored-by: NLevi Broderick <GrabYourPitchforks@users.noreply.github.com>
Co-authored-by: NLevi Broderick <GrabYourPitchforks@users.noreply.github.com>

[main] Update dependencies from dotnet/arcade


 - revert changes to publish-using-darc.ps1

https://github.com/dotnet/arcade/issues/6987

* add tests

* add and use DoProxyAuth

* don't apply max connections to ProxyConnect connections

* make DoProxyAuth a property

* disable WinHttpHandler for new tests

* improve test robustness
Co-authored-by: NGeoffrey Kizer <geoffrek@windows.microsoft.com>

* Fix Random.Next(int, int) on 64-bit when max-min overflow int

The fix is a missing cast.  Everything else is asserts and test changes.

* Update Random.cs

With the advent of #38229 an optimized method may need to report generics
context via `this` while the un-optimzed version did not need to report.

This impacts OSR, which previously was always trying to use the unoptimized
root method frame reporting. Now under OSR we must sometimes add a slot to
the OSR frame instead.

Addresses one of the failure cases in #43534.

* Update dependencies from https://github.com/dotnet/xharness build 20210409.2

Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Xunit
 From Version 1.0.0-prerelease.21207.1 -> To Version 1.0.0-prerelease.21209.2

* Update dependencies from https://github.com/dotnet/runtime-assets build 20210409.2

System.ComponentModel.TypeConverter.TestData , System.Drawing.Common.TestData , System.IO.Compression.TestData , System.IO.Packaging.TestData , System.Net.TestData , System.Private.Runtime.UnicodeData , System.Runtime.TimeZoneData , System.Security.Cryptography.X509Certificates.TestData , System.Windows.Extensions.TestData
 From Version 6.0.0-beta.21174.2 -> To Version 6.0.0-beta.21209.2
Co-authored-by: Ndotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>

Consider any weight greater or equal to be a max weight. Rule of thumb
is that you can assign BB_MAX_WEIGHT but for comparsions one should always
use an inequality or call the helper method.

Fixes #50808.

I noticed that several ALC-related CoreCLR tests fail in Crossgen2
composite mode. I tracked this down to a missing null check.
In addition to that, we were erroneously putting the composite
image to the validation list even when it had been loaded previously.

Thanks

Tomas

* change GC committed bytes unit to MB

* change other memory counters to use 1_000_000

- Pass empty array instead of null for validations

Add CI validation leg for source-build against an image with the tools our source-build partners use to ensure we don't break our source-build partners. (#50811)

* Add CI validation leg for source-build against an image with the tools our source-build partners use to ensure we don't break our source-build partners.

* Update global-build.yml

* Update global-build.yml

* Update centos image.

* Explicitly invoke scl enable llvm-toolset-7.0 since docker doesn't do it for command executed in a running container.

* Skip mono in the source-build build.

* Set param in platform-matrix.yml

Install crossgen, jitinterface, clrjit into the sharedframework folder in crosscomponent build. (#51004)

* Install crossgen, jitinterface, clrjit into the sharedframework folder.

* Remove unneeded dependency

* Add dac/dbi to cross-component sharedFramework folder.

* Don't install the cross-os dac in crosscomponents in cross-bitness scenarios.

* Jit Interface doesn't need to go into the sharedFramework folder (it wasn't there in 6.0.0p3)