* Adds a new package, System.IO.Hashing (netstandard2.0, net461 to reduce netfx restore graph sizes, and net6.0)
* Provides implementations for four hash algorithms
  * CRC-32 (the variation used by IEEE 802.3 (Ethernet))
  * CRC-64 (the variation used by ECMA-182)
  * XxHash32, with optional seed
  * XxHash64, with optional seed
* The tests are structured so that algorithm tests just need to provide their test vectors and do some boilerplate overrides to get variation testing across the instance methods and static methods.

Revise the reporting of the special stack slots for OSR to be more uniform.
* Always record the original method FP-relative offset.
* Always apply the same adjustment for original method slosts i the OSR frame
* Handle caller-SP relative adjustment in `lvaToCallerSPRelativeOffset`

In particular, this fixes #43534 where we were reporting the wrong caller SP
for the profiler exit hook.

* Lsrstats

* jit format

* use blocks iterator

* Do byref liveness updates for same register GPR moves on x86/x64

* Change where emitLastEmittedIns is tracked

* Ensure emitLastEmittedIns isn't tracked across instruction groups

* Add unsigned variants for BitConverter bit APIs

Adds DoubleToUInt64Bits, UInt64BitsToDouble, SingleToUInt32Bits,
UInt32BitsToSingle, HalfToUInt16Bits and UInt16BitsToHalf.

Implementations were based on existing signed integer variants.

Convert usages of existing APIs to unsigned variants when appropriate.

Fix #36469

* Revert comment change

Reverted a comment change made in the existing code by mistake.

* Use existing code for implementations

Use the existing signed methods with a cast, less code with the same codegen.

* Cast correction

Corrected the type used in a cast.

* Fix InvariantGlobalization=false in a trimmed app.

Move the LoadICU logic into a static ctor, so it runs early in the process, but not as part of querying the GlobalizationMode.Invariant property. This allows for LoadICU to still be invoked, even when the app is trimmed and GlobalizationMode.Invariant is hard-coded by the linker.

While I was changing this code, I also removed the workaround in Browser builds for swallowing errors being returned from LoadICU.

Fix #49073
Fix #49391

* Add trimming tests for InvariantGlobalization

* Update the LoadICU message for mobile workloads.

* Respond to PR feedback.

- Split the substitutions of GlobalizationMode.Invariant between true and false
- Add a trimming test that ensures Invariant=true trims everything it is supposed to

* Add checks for all mobile platforms

* Include NetCoreAppCurrent configs in packages

The NetCoreAppCurrent configurations were omitted from packages to avoid
ever growing packages. Now that we adhere to the support policy for
packages we don't need to exclude them anymore as the policy defines a
baseline for .NETCoreApp configurations.

This will remove an artificial difference when source building the
repository and also make it so that partner repositories which don't
depend on a transport package like windowsdesktop (winforms) receive
the very latest assets that are included in the shared framework as
well.

* Fix package validation for non exposed inbox libs

* Add dummy support for s390x in vm, jit, debug, and unwinder

* This suffices to make clr.iltools and clr.paltests buildable

* Merge https://github.com/libunwind/libunwind/pull/245

* Add s390x support to local CMake files

* Add PAL implementation for Linux on s390x

* Define BIGENDIAN on s390x when compiling coreclr

* Provide a default HAVE_FUNCTIONAL_PTHREAD_ROBUST_MUTEXES_EXITCODE
  value in eng/native/tryrun.cmake

* Modernize DiagnosticsHandler tests

* Address PR feedback

SemaphoreSlim => TCS, Guid => nosuchhost.invalid, Http20 => Http2

* Update instruction table with accurate EFlags information

* Revert "Add issues.targets entry for the GitHub_13822 test to make CI green (#53789)"

This reverts commit bd9ba598.

* minor fixup

* Fix some more instructions

* review comments

* Fix Apple Silicon shuffle thunks

Fixes 47294

* Set and use m_hfaFieldSize for stack arguments

m_hfaFieldSize is needed to calculate correct shuffle size.

It seems in the .symbols.nupkg package, instead of a stripped .dylib/so and companion .dwarf/.dbg, we've just been shipping unstripped libs. This commit largely duplicates the functions from eng/native/functions.cmake into an MSbuild proj, as our entire logic is already in MSbuild not CMake.

* Fix compilation errors if host does not support AVX2

* Add comments to empty preprocessor branches

* Explicitly ask for architecture support

* Apply -march-native only on GCC

* Make sure if clang on x64 would be used
it actually pass -march=native, otherwise AVX2 would not be enabled.

* Ask test use AVX2 when run on Windows.

* Check if the marshalling of a field is possible across all platforms.

* Add test for the generic field generation for IClassX.

[mono][llvm] Access mono_polling_required directly instead of loading its value from a GOT slot in static mode. (#53776)

This will potentially avoid one load in the GC safe point code.

In the Win32 version resource, this changes the "Comment" field
from:
```
  Flavor=Checked
```
to:
```
  Flavor=Debug
```

It also properly sets `BUILDENV_DEBUG=1` for debug builds (only used in
exactly one place: gc.cpp).

* Fire diagnostic source events from IHostBuilder.Build
- We want to enable getting access to the IHostBuilder and IHost during the call to IHostBuilder.Build so that we can access the application's IServiceProvider from various tools. Usually, this is enabled by exposing a different entry point from the application but this technique allows us to let the application execute normally and hook important events via a diagnostic source.
- Add support for the new pattern in HostFactoryResolver
- Added support for resolving an IServiceProvider using the new diagnostics source pattern (which doesn't require a different entrypoint)
- Detect the version of Microsoft.Extensions.Hosting before waiting for events to fire
- We want to fail fast if we know this version of hosting will never fire events of if the hosting assembly fails to load. Added a version check.
- Allow the caller to specify a wait timeout.
-  Added a flag to allow running the application to completion

Fixes https://github.com/dotnet/runtime/issues/53811

The props were not taking into account the right paths.

* Sockets.tests: TcpReceiveSendGetsCanceledByDispose: remove Timeout.

This timeout is not needed and masks a more useful exception thrown
by the test.

* Add WaitAsync to timeout on all async operations

* Add missing timeout

[libraries] Fix metadata name following arcade change to stop supporting multiple targets in helix sdk (#53828)
Co-authored-by: NMitchell Hwang <mitchell.hwang@microsoft.com>

[main] Update dependencies from dotnet/runtime dotnet/hotreload-utils dotnet/xharness

Add more iterators compatible with range-based `for` syntax for various data structures. These iterators all assume (and some check) that the underlying data structures determining the iteration are not changed during the iteration. For example, don't use these to iterate over the predecessor edges if you are changing the order or contents of the predecessor edge list.

- BasicBlock: iterate over all blocks in the function, a subset starting not at the first block, or a specified range of blocks. Removed uses of the `foreach_block` macro. E.g.:
```
for (BasicBlock* const block : Blocks()) // all blocks in function
for (BasicBlock* const block : BasicBlockSimpleList(fgFirstBB->bbNext)) // all blocks starting at fgFirstBB->bbNext
for (BasicBlock* const testBlock : BasicBlockRangeList(firstNonLoopBlock, lastNonLoopBlock)) // all blocks in range (inclusive)
```

- block predecessors: iterate over all predecessor edges, or all predecessor blocks, e.g.:
```
for (flowList* const edge : block->PredEdges())
for (BasicBlock* const predBlock : block->PredBlocks())
```

- block successors: iterate over all block successors using the `NumSucc()/GetSucc()`, or `NumSucc(Compiler*)/GetSucc(Compiler*)` pairs, e.g.:
```
for (BasicBlock* const succ : Succs())
for (BasicBlock* const succ : Succs(compiler))
```
Note that there already exists the "AllSuccessorsIter" which iterates over block successors including possible EH successors, e.g.:
```
for (BasicBlock* succ : block->GetAllSuccs(m_pCompiler))
```

- switch targets, (namely, the successors of `BBJ_SWITCH` blocks), e.g.:
```
for (BasicBlock* const bTarget : block->SwitchTargets())
```

- loops blocks: iterate over all the blocks in a loop, e.g.:
```
for (BasicBlock* const blk : optLoopTable[loopInd].LoopBlocks())
```

- Statements: added an iterator shortcut for the non-phi statements, e.g.:
```
for (Statement* const stmt : block->NonPhiStatements())
```
Note that there already exists an iterator over all statements, e.g.:
```
for (Statement* const stmt : block->Statements())
```

- EH clauses, e.g.:
```
for (EHblkDsc* const HBtab : EHClauses(this))
```

- GenTree in linear order (but not LIR, which already has an iterator), namely, using the `gtNext` links, e.g.:
```
for (GenTree* const call : stmt->TreeList())
```

This is a no-diff change.

* Resolving ILLink warnings on Microsoft.Extensions.Options.ConfigurationManager

* Fix message

* Addressing messages feedback

* Update src/libraries/Microsoft.Extensions.Logging.Configuration/ref/Microsoft.Extensions.Logging.Configuration.cs
Co-authored-by: NEric Erhardt <eric.erhardt@microsoft.com>

* Update remaining messages with suggestion.
Co-authored-by: NEric Erhardt <eric.erhardt@microsoft.com>

The Azure Storage REST API returns a maximum of 5000 results in
a single query. We have more results in the JIT rolling build set,
so we weren't finding queried git_hash values.

Generalize the query to loop using the "marker" continuation functionality.

We currently have about 800 superpmi collections results, but update
the superpmi.py script similarly for future proofing.

I also changed the query used by jitrollingbuild.py to specify a prefix,
to avoid requiring so many results. Probably should do the same thing for
SuperPMI collections. The downside is the REST api doesn't have a facility
for the prefix to be case-insensitive. I think it's ok to be case-sensitive,
but we'd need to verify that.

* Throw ArgumentNull instead of NullReference for null requests

* Don't use Send on browser

[main] Update dependencies from dnceng/internal/dotnet-optimization

* Create Sdk.props in AOT compilers with a template

Fixes https://github.com/dotnet/runtime/issues/53653

Example:

```
sudo cat Sdk/Sdk.props
<Project>
  <ItemGroup>
    <MonoAotCrossCompilerPath Include="$(MSBuildThisFileDirectory)..\tools\mono-aot-cross" RuntimeIdentifier="iossimulator-arm64" />
  </ItemGroup>
</Project>
```

* Remove HarvestVersionValidation from pkg testing

As packages assets aren't redistributed anymore, harvesting doesn't need to rely on exact versions and thus the task isn't necessary anymore.

* Change package testing to use RuntimeTargets rather than RID-specific restore

* Upload binlogs for package testing

* Address feedback

Simplify outer build of package tests to just use InnerTargets extension point.

Use Helix's work-item isolated packages folder

Give a better name to binlogs

* Cleanup old suppressions

* Use ReferenceCopyLocalPaths for runtime testing

This item will be conflict-resolved whereas RuntimeCopyLocalItems was not.

Also fix the case where a package intentionally provides no assets (yet installs)

* Don't include runtime dependencies when reference was excluded by conflict resolution

* Fix import conventions in outer build

* Workaround conflict resolution on .NETStandard runtime

.NETStandard doesn't conflict resolve runtime assets.
Workaround by feeding .NETStandard references as runtime for purposes of conflict resolution.