Merge pull request dotnet/coreclr#9408 from jashook/disable_checked_arm64

Disable checked arm64 jobs until jobs are stable

Commit migrated from https://github.com/dotnet/coreclr/commit/9b0137f9ce00049955366fa5fb6066f0ab8ffc65

[x86/Linux] Use SP as StackMarker (dotnet/coreclr#9389)

Commit migrated from https://github.com/dotnet/coreclr/commit/0dc81ab6810e43253411ae76a780c8291650da0f

Disable checked arm64 jobs until jobs are stable

Jobs currently are expected to run red until a lstFile update goes in. Therefore,
disable the job as a PR trigger until it is clean.

Commit migrated from https://github.com/dotnet/coreclr/commit/842c64eb8ea0181368ad8e0830191fb71a92c69c

Add ComVisible(true) back to several special types (dotnet/coreclr#9403)

It is required by WinRT/COM interop. Fixes dotnet/coreclr#9401.

Commit migrated from https://github.com/dotnet/coreclr/commit/272cc4e755e6ef4570d70b815a03c15c7a9ccc1b

Remove more CAS (dotnet/coreclr#9390)

* Remove PermissionSet

* Remove HostProtectionAttribute

* Remove PermissionState

* Remove S.Security.Permissions

* Remove IPrincipal

* Fix native side

* Remove model.xml again

Commit migrated from https://github.com/dotnet/coreclr/commit/c35e8dbc37e5380f46553510d0368aad04a677d2

Fix field type for ByReference<T> and TypedReference (dotnet/coreclr#9284)

Fix field type for `ByReference<T>` and `TypedReference`

Fixes dotnet/coreclr#7894

Commit migrated from https://github.com/dotnet/coreclr/commit/3c34cce7187e44c024331ad6267c6507034e48bd

Add scripts & docs which support creating an Android toolchain on Linux (dotnet/coreclr#9175)

* Add scripts & docs which support creating an Android toolchain on Linux

Commit migrated from https://github.com/dotnet/coreclr/commit/05ec3cea1f58eec67f85de09e8869e9239e6c94d

Merge pull request dotnet/coreclr#9385 from jashook/lower_block_store_arm64

Call LowerBlockStore TreeNodeInfoInitBlockStore

Commit migrated from https://github.com/dotnet/coreclr/commit/49e51a52fac3ee4e0f893b862b759473d3f5f2f6

Design portable tail calls with helpers (dotnet/coreclr#8596)

* Design portable tail calls with helpers

Currently we don't handle non-trivial cases of tail calls on Unix due to the non-portable and
complex way it is implemented. This pull request describes a design of a portable way of
handling these cases so that it can be used uniformly over all our jitted and AOT (ahead of time)
platforms.

Commit migrated from https://github.com/dotnet/coreclr/commit/647e7f1f39040fbd7e77d1d7cc56c22deb7ec2a9

Merge pull request dotnet/coreclr#9383 from dotnet-bot/master-UpdateDependencies

Update CoreClr, CoreFx to beta-25007-01, beta-25007-01, respectively (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/597a00ece8ac99b603df9876bd9e9b01e536a9e3

[x86/Linux] Clean up EHContext-related code (dotnet/coreclr#9395)

Commit migrated from https://github.com/dotnet/coreclr/commit/35e91e578712bdcc881c56e515dba07e6be3f15d

Remove bclrewriter (dotnet/coreclr#9351)

* Remove bclrewriter

* Dump crossgen error to Jenkins log

Commit migrated from https://github.com/dotnet/coreclr/commit/505d2266d4d10229105408c6f803acb5a017b0fa

Clean up methods for USE_GC_INFO_DECODER (dotnet/coreclr#9394)

Commit migrated from https://github.com/dotnet/coreclr/commit/2945233dec39a07652455ffb075b0a4a5f303fa6

Move GC/Coverage/delete_next_card_table to the Long GC playlist (dotnet/coreclr#9376)

Commit migrated from https://github.com/dotnet/coreclr/commit/cf42bd28027e62ffff3d7f8b68a50fde1f0cdccf

Fix a typo in TailCallFrame::UpdateRegDisplay log (dotnet/coreclr#9381)

Commit migrated from https://github.com/dotnet/coreclr/commit/59738c718a32e600be07391540a540046f99c741

Merge pull request dotnet/coreclr#8849 from seanshpark/fixstackalign

[x86/Linux] Stack align 16 bytes for JIT code

Commit migrated from https://github.com/dotnet/coreclr/commit/b05cf502b27205b412c31a8c4de59a3a73dbd11e

[ARM32/Linux] Fix calling convention - stdcall in crossgen (dotnet/coreclr#9364)

* [ARM32/Linux] Fix calling convention - sdcall in crossgen

- Fix calling convention:
not use stdcall for ENCODEMODULE_CALLBACK & DEFINETOKEN_CALLBACK in linux/x86
x86-host/arm32-target crossgen & x86 crossgen
build error in clang 3.9: not allowed calling convention casting

Commit migrated from https://github.com/dotnet/coreclr/commit/3108cc7e12e004e6c6bab2daf7826dd97957101f

Update CoreClr, CoreFx to beta-25007-01, beta-25007-01, respectively

Commit migrated from https://github.com/dotnet/coreclr/commit/c9b94fa3c428a41e3e24896c598706eba16ca36c

Call LowerBlockStore TreeNodeInfoInitBlockStore

For arm64 call LowerBlockStore before TreeNodeInfoInitBlockStore
as done on other architectures.

Commit migrated from https://github.com/dotnet/coreclr/commit/db88095a97e71b18cfc510c811eae2ca290cce09

Merge pull request dotnet/coreclr#9377 from RussKeldorph/defaultprivate

Default-trigger ARM64 testing on certain users' PRs

Commit migrated from https://github.com/dotnet/coreclr/commit/ff1e4f3c2a9737f87608b735f6cd197523a2026b

[x86/Linux] Stack align 16 bytes for JIT code

Change JIT code to align stack in 16 byte used in modern compiler

Commit migrated from https://github.com/dotnet/coreclr/commit/5df45286968775ffccaf01669eba7c8baa9923e1

Default-trigger ARM64 testing on certain users PRs

Re-using the logic that allows certain users to request ARM64 testing to
default-trigger ARM64 testing on their PRs.  Ideally, we'd be able to
separate the list of people who have permission to trigger testing from
those that get testing by default, but that is harder than it seems.

Commit migrated from https://github.com/dotnet/coreclr/commit/9a9dce8e42c0ff4fa4cca9d97c2db31fcb377b17

Merge pull request dotnet/coreclr#9372 from dotnet-bot/master-UpdateDependencies

Update CoreClr, CoreFx to beta-25006-03, beta-25006-01, respectively (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/65b9cb35226c5395be531554e207bb4e2096092f

Merge pull request dotnet/coreclr#9325 from wtgodbe/bashScripts

Add #!/bin/bash to beginning of shell test scripts

Commit migrated from https://github.com/dotnet/coreclr/commit/83585ce21902048f6ad4b7b48cc9ba53cc72e752

Merge pull request dotnet/coreclr#9319 from DrewScoggins/X86PerfRuns

Add x86 perf runs to CoreCLR

Commit migrated from https://github.com/dotnet/coreclr/commit/9f7adfcc30d3b9d3ecdb9927504cc2f028a3a65b

Merge pull request dotnet/coreclr#8644 from BruceForstall/SimdLongDecomp

Enable SIMD for RyuJIT/x86

Commit migrated from https://github.com/dotnet/coreclr/commit/d05009a17e194d50726454f348e93890273e62f5

Merge pull request dotnet/coreclr#9371 from jkotas/attributes

Delete COM and security transparency attributes

Commit migrated from https://github.com/dotnet/coreclr/commit/80c30e7dfbe00ab30bb86ba2c0f883130766643e

Change /bin/bash to usr/bin/env bash

Commit migrated from https://github.com/dotnet/coreclr/commit/eff04fba8822d89892ad1d18e20f665e06feca8f

Merge pull request dotnet/coreclr#8827 from hseok-oh/nuget_armel

Generate nuget package for armel (Tizen, Debian)

Commit migrated from https://github.com/dotnet/coreclr/commit/a60c0648ed79f0678240eb7be4496b687fb3dbbe

Update CoreClr, CoreFx to beta-25006-03, beta-25006-01, respectively

Commit migrated from https://github.com/dotnet/coreclr/commit/89ec31faf6c4e3cca133a4fa8d897851b5a044b1

Clean up FillRegDisplay (dotnet/coreclr#9360)

Commit migrated from https://github.com/dotnet/coreclr/commit/c9978fc29ee207d4099faad2716d996bca0a7bbd

Delete remaining security transparency annotations

Commit migrated from https://github.com/dotnet/coreclr/commit/215fe870868f88f8566d53262c9924d58ea48f21

Delete ClassInterface attributes

Commit migrated from https://github.com/dotnet/coreclr/commit/345005de9521c34c0c023539d9afef48acead426

Delete ComVisible attributes

Commit migrated from https://github.com/dotnet/coreclr/commit/f705205bdeef23187011a65376a3c7dcb448f359

Android - Fix duplicate definitions of INT_MIN and PAGE_SIZE in unit tests (dotnet/coreclr#9172)

* Don't refdefine PAGE_SIZE on Android

* Don't re-declare INT_MIN on Android

* Fixup

Commit migrated from https://github.com/dotnet/coreclr/commit/ec23bace223bf449a08bde2f1ec3e2c0135ce408

Merge pull request dotnet/coreclr#9368 from stephentoub/cq_fixes

Two fixes to ConcurrentQueue

Commit migrated from https://github.com/dotnet/coreclr/commit/f07a4ba427e9a83dc04c03eceb97bf33f0335461

CAS Security cleanup (dotnet/coreclr#9355)

Commit migrated from https://github.com/dotnet/coreclr/commit/5c47caa806e6907df81e7a96864984df4d0f38cd

Merge pull request dotnet/coreclr#9367 from dotnet-bot/master-UpdateDependencies

Update CoreClr to beta-25006-02 (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/0b064eef415468f50e7360256e42737d247eb677

Two fixes to ConcurrentQueue

- Changed comparisons to use subtraction to avoid overflow issues on sequence numbers.
- Added an exception message where a TODO was left in the code

Commit migrated from https://github.com/dotnet/coreclr/commit/c51054c54fc0cc5e36e710a76ad41aba963c67fc

Update CoreClr to beta-25006-02

Commit migrated from https://github.com/dotnet/coreclr/commit/cb0546dc5ef7eb46425dbf55e9895d6ba2c3fd81

Enable SIMD for RyuJIT/x86

This change implements support for Vector<long>, handling
SIMDIntrinsicInit, which takes a LONG, and decomposition of
SIMDIntrinsicGetItem, which produces a LONG.

It also enables SIMD, including AVX, by default for RyuJIT/x86.

Commit migrated from https://github.com/dotnet/coreclr/commit/cacb79692c4db6c4dded4d8f6a55e7fd8fa11d3a

Delete dead code from ExecutionContext (dotnet/coreclr#9359)

Commit migrated from https://github.com/dotnet/coreclr/commit/09a834c056db4bdfd7bcf202818e963e2506e58d

Merge pull request dotnet/coreclr#9358 from dotnet-bot/master-UpdateDependencies

Update CoreClr to beta-25006-01 (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/66e381b37c6446607cd539443e3873066940fae2

Merge branch 'master' into nuget_armel

Commit migrated from https://github.com/dotnet/coreclr/commit/f2efef85bd811169ccc2e1896fb9d689b1fb459b

[x86/Linux] Add Assertion on pvControlPc (dotnet/coreclr#9356)

Commit migrated from https://github.com/dotnet/coreclr/commit/a702f3f0a4a178ec1f1597c7cb47a35c0940d57b

Update CoreClr to beta-25006-01

Commit migrated from https://github.com/dotnet/coreclr/commit/e5d6ecbfe30c1824134a290ed5f2f8fb1dc43e7a

Update CoreClr, CoreFx to beta-25005-03, beta-25004-01, respectively (dotnet/coreclr#9350)

Commit migrated from https://github.com/dotnet/coreclr/commit/df659fc58c602eb079d3620e9e9925d3c78318f4

Port dotnet/coreclr@121d095ed0b0076fb1c7ff59e6446fd19d506b32 from Windows to Linux (dotnet/coreclr#9346)

Commit migrated from https://github.com/dotnet/coreclr/commit/b71f447ce5c5c5423654f38df1bdcc6bf9970787

Port dotnet/coreclr#5821 to Linux (dotnet/coreclr#9347)

Commit migrated from https://github.com/dotnet/coreclr/commit/e01f1e164e8704bdbcbb26442961d94db11d8152

Port dotnet/coreclr#5339 to Linux (dotnet/coreclr#9348)

Commit migrated from https://github.com/dotnet/coreclr/commit/d5fe383d22fa36b1f30ef3bd93bca192ad096225

Merge pull request dotnet/coreclr#9342 from stephentoub/tasks_inlining

Remove NoInlining/StackCrawlMarks from Tasks

Commit migrated from https://github.com/dotnet/coreclr/commit/a8c08f3eff7a6e9d9391816006ad2121c0f5b9b2

Address PR feedback and other cleanup

Addressed PR comment about removing ExecutionContext.Capture(ref StackCrawlMark, ...), which led me to remove NoInlining/StackCrawlMarks from some other places in Timer, Thread, ThreadPool, and Overlapped.

In doing so, I found several other unnecessary members on ExecutionContext that could be removed with minor tweaks elsewhere in the source, e.g.
- Dispose is a nop, so we can remove explicit try/finally's to clean it up
- ExecutionContext.Run(..., bool) just ignores the bool arg, so it can be removed and all call sites redirected (but I've left it in EC, as it appears it's used via internals visible from a library in corefx)
- FastCapture() just calls Capture, so the call sites can be changed (but I've left it in EC for a similar reason)
- PreAllocatedDefault can be removed in favor of Default; etc.
- ExecutionContext.Capture itself checks whether flow is suppressed; doing a check before it adds a TLS lookup and in doing so optimizes for an uncommon case in exchange for making the common case more expensive.  I've removed those checks.

And in the process, I also noticed that several lazily initialized delegates that no longer need to be, and cleaned those up.  These were lazy due to needing to be for security checks that aren't relevant in coreclr.

Commit migrated from https://github.com/dotnet/coreclr/commit/b72fc3aa651ffdeb9136f785fc7631663a92685f

Remove NoInlining/StackCrawlMarks from Tasks

These crawl marks in Tasks aren't relevant in coreclr (they're passed down to ExecutionContext, which in coreclr just ignores them), yet they required NoInlining, which does impact coreclr.  Removing them all from tasks.

Commit migrated from https://github.com/dotnet/coreclr/commit/f338eaae1d696e414632ba8f630457f7a0d562ab

Merge pull request dotnet/coreclr#9343 from stephentoub/tasks_selfreplicating

Remove internal self-replicating support from Tasks

Commit migrated from https://github.com/dotnet/coreclr/commit/d676fc37699e4e4cbf629da87f8600eacaae7f2b

Remove internal self-replicating support from Tasks

In the initial TPL prototype, Tasks had a feature that allowed them to "replicate", meaning to schedule a copy of themselves.  Prior to shipping the initial version, this feature was made internal, as it was deemed unnecessary, but by then the Parallel loops constructs had already been built on top of them.  Now that Parallel no longer depends on this feature (and isn't in CoreLib), we can entirely rip it out.

Commit migrated from https://github.com/dotnet/coreclr/commit/d433a7b4443c7a6eee389c6cb57a21c7e307630a

Rename internal CoreLib Console to LowLevelConsole (dotnet/coreclr#9341)

Commit migrated from https://github.com/dotnet/coreclr/commit/5a885fa087396974b728d8af6320da8a271dbbbc

Merge pull request dotnet/coreclr#9338 from jkotas/against-packages

Add mscorlib.dll back to Microsoft.TargetingPack.Private.CoreCLR

Commit migrated from https://github.com/dotnet/coreclr/commit/c4a89fe2d82e00f683f486afe5347c9e5ef1f94b

Use StringBuilderCache for Enum.InternalFlagsFormat (dotnet/coreclr#9340)

Commit migrated from https://github.com/dotnet/coreclr/commit/bb8c87648f47940f7924e249c34b620bc19a9165

Remove stripped code (dotnet/coreclr#9269)

Delete essentially all the code that the BCL rewriter is removing.
Added back some code it shouldn't have been removing, eg., serialization code, debugger visualizers, and some changing of 'protected' to 'protected internal'

Commit migrated from https://github.com/dotnet/coreclr/commit/ee5862c6a257e60e263537d975ab6c513179d47f

Merge pull request dotnet/coreclr#9240 from BruceForstall/FixSimdFieldMorphingDeadCode

Remove SIMD dead code

Commit migrated from https://github.com/dotnet/coreclr/commit/43dfb0b289978f408dcb1aa008395fe9b90db062

Add mscorlib.dll back to Microsoft.TargetingPack.Private.CoreCLR

Removing it broke BuildFromPackages flavor of test build

Commit migrated from https://github.com/dotnet/coreclr/commit/9856edcb9cd2dc762e770d8de93a44277715fe13

Revert "Update CoreClr, CoreFx to beta-25004-01, beta-25004-01, respectively (dotnet/coreclr#9330)"

This reverts commit dotnet/coreclr@e8dff5550c022d2854914dc534f9ec3d7fe623ac.

Commit migrated from https://github.com/dotnet/coreclr/commit/ac2da9ca851eb9a494ef617d02b3bafbf0c7da3b

Merge pull request dotnet/coreclr#9324 from gkhanna79/Fix9030

Use fallback load context as binding context for dynamic parent assembly

Commit migrated from https://github.com/dotnet/coreclr/commit/7916a9a4e45a8d880d3b2af52ed9fe069663e7fc

Remove duplicate attributes from CoreLib (dotnet/coreclr#9327)

Commit migrated from https://github.com/dotnet/coreclr/commit/622aa57cb2a702b69fdb9c7537a23c35f1a1913e

Update CoreClr, CoreFx to beta-25004-01, beta-25004-01, respectively (dotnet/coreclr#9330)

Commit migrated from https://github.com/dotnet/coreclr/commit/e8dff5550c022d2854914dc534f9ec3d7fe623ac

Remove cross appdomains cultures checks (dotnet/coreclr#9328)

* Remove cross appdomains cultures checks

In the ful framework, CultureInfo and other globalization objects are marked as agile which means it can cross the appdomains. In coreclr we don't have multiple appdomains anymore so these checks are not really needed.
removing these checks will make coreclr consistent when running on Windows and other OS's

* Remove un-needed resource entry

Commit migrated from https://github.com/dotnet/coreclr/commit/748d467b1cbc759c23d94de0b559d9a437623b38

Fix legacy Globalization tests to work on Linux (dotnet/coreclr#9322)

* Fix legacy Globalization tests to work on Linux

* Delete globalization tests

Commit migrated from https://github.com/dotnet/coreclr/commit/e2f7e206f8d4f6e21213baadd2fad33340f2005c

Fix typo

Commit migrated from https://github.com/dotnet/coreclr/commit/beb30ddc152e34aa453a892c36782254f1178668

Add #!\bin\bash to beginning of shell test scripts

Commit migrated from https://github.com/dotnet/coreclr/commit/c0d55096cd86115c565b1c6379ed3a508be4e2ef

Use fallback load context as binding context for dynamic parent assembly

Commit migrated from https://github.com/dotnet/coreclr/commit/04c698ec434618ee2a0cef36be9b1829355dc64e

Add x86 perf runs to CoreCLR

This is a change to add x86 perf runs to the CoreCLR repo.  This also
changes the command to launch a perf run from a PR to include the
architecture.

Commit migrated from https://github.com/dotnet/coreclr/commit/36415889747eb4f59a657484530de92da8b86851

Delete mscorlib from packages (dotnet/coreclr#9313)

Commit migrated from https://github.com/dotnet/coreclr/commit/4fe623c9235e4df42be810d09ca7f282956e3cec

Switch netcoreapp test reference to netcoreapp2.0 (dotnet/coreclr#9310)

Commit migrated from https://github.com/dotnet/coreclr/commit/ec305062fa351ea9b03fc687b985ce007bf81aac

Update glossary.md

Commit migrated from https://github.com/dotnet/coreclr/commit/d00235f94acb7a03d6b8a37604c1f540430fdd03

Merge pull request dotnet/coreclr#9315 from wtgodbe/disableBenchmarkGames

Disable failing Helix tests until we fix underlying issues

Commit migrated from https://github.com/dotnet/coreclr/commit/a5d37a98c4fdcee1336437804a06f3349828f966

Disable failing Helix tests until we fix underlying issues

Commit migrated from https://github.com/dotnet/coreclr/commit/8562daa78c0ede7910414368047c3aa3b583289d

Update glossary.md

Commit migrated from https://github.com/dotnet/coreclr/commit/f0e57dc218055f65e678e78a286fff6976758a55

Merge pull request dotnet/coreclr#9294 from dotnet-bot/master-UpdateDependencies

Update CoreClr, CoreFx to beta-25003-02, beta-25003-02, respectively (master)

Commit migrated from https://github.com/dotnet/coreclr/commit/ee35cf1b2519c5c3307f129bb39a55f8448287c4

[x86/Linux] Clean Up #ifdef for VerifyValidTransitionFromManagedCode (dotnet/coreclr#9304)

Commit migrated from https://github.com/dotnet/coreclr/commit/3dbe09dec2a8c0ff86ccaed850563efc2dedb59b

[x86/Linux] Clean up non-WIN64EXCEPTIONS code: (dotnet/coreclr#9305)

Commit migrated from https://github.com/dotnet/coreclr/commit/acc2b37fa57cc0a25c88d54c82a23632400b38b9

[x86/Linux] Clean Up JIT_EndCatch (dotnet/coreclr#9302)

Commit migrated from https://github.com/dotnet/coreclr/commit/0f02eb4f3b77fd8908baf4b61f4bf0bf99c2928d

Merge pull request dotnet/coreclr#9256 from CarolEidt/TreeNodeInfoSplit

Refactor TreeNodeInfoInit

Commit migrated from https://github.com/dotnet/coreclr/commit/9c2f5f2a4870cb9fdddc21c9b32cabee977dd2f8

Merge pull request dotnet/coreclr#9279 from stephentoub/more_tp_perf

Some more perf tweaks to ThreadPool

Commit migrated from https://github.com/dotnet/coreclr/commit/cfd28c5021187e19c1da5eff0b62f3419d8b5d26

Update CoreClr, CoreFx to beta-25003-02, beta-25003-02, respectively

Commit migrated from https://github.com/dotnet/coreclr/commit/2a26e920a6a35a3cacf9ce14b1f9e03ec1536c21

Reduce cost of LocalPop when local queue empty

- Change LocalPop to be parameterless and return the IThreadPoolWorkItem rather than returning a bool and having the IThreadPoolWorkItem in an out arg.
- Refactor LocalPop slightly to have an inlineable upfront check for whether the local queue is empty, and only call the non-inlineable method if there's something that could potentially be popped

Commit migrated from https://github.com/dotnet/coreclr/commit/70aae70a9726cd3aa4435f1cc94aadce9470236d

Allow Dequeue to avoid TrySteal if there's nothing to steal

Commit migrated from https://github.com/dotnet/coreclr/commit/b185fe7e76a4bbef989dc69f9cec29e40d9f6f13

Address PR feedback

Commit migrated from https://github.com/dotnet/coreclr/commit/43985a27a3a965e45c1904423baecb66690c15e3

Enable inlining of EnsureVMInitialized

Commit migrated from https://github.com/dotnet/coreclr/commit/a0d078a969f805b868b0cf3cd4a36bb5cc87c309

Replace usage of Random

We need some randomness, but it doesn't need to be particularly good, just fast.  A simple xorshift prng is 3-4x faster than Random, in particular without multiple virtual method calls that don't get inlined.  It's also a bit lighter in terms of memory (though there's only one of these per thread, so it doesn't impact much).

Commit migrated from https://github.com/dotnet/coreclr/commit/c06dc0048f935c8de4f35972b0c70f970b7b254c

Remove StackCrawlMark goo from {Unsafe}QueueUserWorkItem

Allow more methods to be inlined

Commit migrated from https://github.com/dotnet/coreclr/commit/d41bffbfeb3f5adf1b0e6a0309d8a23294b91f0a

Remove unnecessary try/finally blocks

And clean up the code around it.

Commit migrated from https://github.com/dotnet/coreclr/commit/c3cefb7c459ac05fd9605c29cf1fc1ecd1ce3cab

Rework work-stealing queue list

The current data structure used to store the list of local work-stealing queues is maintains a sparse array, where entries can be null, and where removals null out entries in an active array that could be being read by another thread concurrently.  This necessitates that threads looking for work need to use volatile reads and null checks on each element.  Further, because the array doubles in size when it grows, and never shrinks, we often end up having many empty slots that threads need to look at as they're looking for work.

It's actually relatively rare for threads to come and go.  While the thread pool does take threads in and out of service, it only rarely actually terminates a thread or asks the OS for a new one, so it's relatively rare that threads are added/removed from the list.  Given that, we can simply use immutable arrays, creating a new array of the exact right size whenever a thread is added or removed.  Then iteration can be done without volatile reads and without null checks, because the contents of the array being read through won't change and won't ever be null.

Commit migrated from https://github.com/dotnet/coreclr/commit/71bc68eced44a188ef51678b1d9c7337051cf3c3

Reorder usings per previous PR feedback

Commit migrated from https://github.com/dotnet/coreclr/commit/6294a0ddd740876ada4462abb1b9e81fc2e19318

[x86/Linux] Do NOT use QuickUnwindStackFrame (dotnet/coreclr#9299)

* [x86/Linux] Do NOT use QuickUnwindStackFrame

* Fix x64 build error

Commit migrated from https://github.com/dotnet/coreclr/commit/53e62b4e3ca7792b1c4966823832de56f88db0b6

[x86/Linux] Convert Fake DBZ into OVF (dotnet/coreclr#9295)

Commit migrated from https://github.com/dotnet/coreclr/commit/29ce2010b38e73ea8effa412f9cc6bc7afa882e8

Merge pull request dotnet/coreclr#9283 from adiaaida/devdiv377155

Add a test for dotnet/coreclr#9282

Commit migrated from https://github.com/dotnet/coreclr/commit/aca9d877b6540f64f01a7571b65f164457ce24dd

Clean up GetAddrOfSecurityObjectFromCachedInfo (dotnet/coreclr#9291)

GetAddrOfSecurityObjectFromCachedInfo seems to be X86-specific, but has
ifdef for other architectures.

This commit declares GetAddrOfSecurityObjectFromCachedInfo only for X86
to simplify its implementation.

Commit migrated from https://github.com/dotnet/coreclr/commit/7554180ccf845804de069b2b6b3c1bab48009e26

[x86/Linux] Do NOT use GSCookie on Funclet (dotnet/coreclr#9290)

Commit migrated from https://github.com/dotnet/coreclr/commit/03a27899e86c0334e499151cf27cc6ddd3aebd4e

Refactor TreeNodeInfoInit

Move all the register requirements (TreeNodeInfoInit) code into lsra{arch}.cpp.
Split methods that currently do both tree transformation and register requirements.

Commit migrated from https://github.com/dotnet/coreclr/commit/2e9ff0c9ad4185ac5d590fb63aa57141b3031fab

Merge pull request dotnet/coreclr#9280 from wtgodbe/disableLargeMemoryTests

Disable GC LargeMemory tests that were failing in Helix

Commit migrated from https://github.com/dotnet/coreclr/commit/047df06e939b7dface0641c1bfbb9db137390c82