Squashed commit of the following:

commit 7ae87de
Author: Larry Ewing <[email protected]>
Date:   Mon Sep 9 22:11:12 2024 -0500

    [wasm] more cases when looking up unmanaged delegates (dotnet#107113)

    Make the association between the wasm_native_to_interp_ftndescs generation and the lookup from unmanaged more robust so that we don't see problems like dotnet#107212 where the same slot was being reused for multiple methods with different signatures. To do this we change the Key(s) we use and fix the string escaping it relies on, and attempt to lookup by token first.

    Next , we rewrite the C code generation to make it easier to read and modify and mitigate some potentially negative memory side effects of that we introduce a gratuitous custom text writer that understands the idea of concatenated strings and use that where possible when building the output.

    Next, we change the import code generation to use binary rather than linear search for both the module and symbol. And finally, we update the ICall table generation to use the extensions.

    part of dotnet#104391 and dotnet#107212

commit 1808129
Author: Elinor Fung <[email protected]>
Date:   Mon Sep 9 20:03:34 2024 -0700

    Remove FCThrowRes from AssemblyNative::IsDynamic (dotnet#107574)

commit 5cb6a06
Author: Aman Khalid <[email protected]>
Date:   Tue Sep 10 02:38:23 2024 +0000

    JIT: Add simple late layout pass (dotnet#107483)

commit c762b75
Author: Martin Costello <[email protected]>
Date:   Tue Sep 10 03:15:53 2024 +0100

    Add [DebuggerDisplay] to CancellationTokenSource (dotnet#105764)

    * Add [DebuggerDisplay] to CancellationTokenSource

    Add `[DebuggerDisplay]` to `CancellationTokenSource` to show whether cancelled or disposed.

    Relates to dotnet#105698.

    * Update src/libraries/System.Private.CoreLib/src/System/Threading/CancellationTokenSource.cs

    ---------

    Co-authored-by: Stephen Toub <[email protected]>

commit b77b71e
Author: Katelyn Gadd <[email protected]>
Date:   Mon Sep 9 17:40:14 2024 -0700

    [wasm] Clean up some FIXMEs in the jiterpreter (dotnet#107562)

    * Cleanup some fixmes in the jiterpreter

    * Flow through size of the var in MINT_LDLOCA_S so jiterpreter can do accurate invalidation

commit c21d90e
Author: Pavel Savara <[email protected]>
Date:   Tue Sep 10 02:40:00 2024 +0200

    [WASI] improve single-threaded threadpool (dotnet#107395)

    * fix dotnet#104803

    * PollWasiEventLoopUntilResolvedVoid

    * more

    * wip

    * CPU-bound work to do

    * fix exit

    * Update src/mono/sample/wasi/http-p2/Program.cs

    Co-authored-by: Larry Ewing <[email protected]>

    * feedback

    ---------

    Co-authored-by: Larry Ewing <[email protected]>

commit 61de5df
Author: Elinor Fung <[email protected]>
Date:   Mon Sep 9 17:14:07 2024 -0700

    Make DAC and ProfToEEInterfaceImpl stop using BaseDomain (dotnet#107570)

    `BaseDomain` should no longer be needed now that we only have one `AppDomain` and the `SystemDomain` can be treated as separate. This makes the DAC and ProfToEEInterfaceImpl use `AppDomain` directly and check against `SystemDomain::System()` to determine if a pointer is the system domain.

commit 76dbb27
Author: Stephen Toub <[email protected]>
Date:   Mon Sep 9 19:59:54 2024 -0400

    Use SearchValues in Uri.CheckForUnicodeOrEscapedUnreserved (dotnet#107357)

commit 149d4bb
Author: Miha Zupan <[email protected]>
Date:   Mon Sep 9 16:54:00 2024 -0700

    Extend the list of recognized SearchValues<char> field names in Regex (dotnet#107402)

commit e591fbf
Author: Kunal Pathak <[email protected]>
Date:   Mon Sep 9 16:38:42 2024 -0700

    Arm: Fix the base register used for restoring register from stack (dotnet#107564)

    * Use correct baseReg for vstr, similar to vldr

    * add test cases

    * Mark internal test methods private

commit 51c350c
Author: Elinor Fung <[email protected]>
Date:   Mon Sep 9 16:35:02 2024 -0700

    Make missing framework error message list other architectures that were found (dotnet#107156)

    When erroring on a missing framework, check if there are versions of the framework for other architectures and list them for the user.

commit 2ed43b6
Author: Alan Hayward <[email protected]>
Date:   Mon Sep 9 23:53:45 2024 +0100

    ARM64-SVE: Allow op inside conditionalselect to be non HWintrinsic (dotnet#107180)

    * ARM64-SVE: Allow op inside conditionselect to be non HWintrinsic

    * Add Sve.IsSupported check to test

commit ac4b7c6
Author: Kunal Pathak <[email protected]>
Date:   Mon Sep 9 15:52:00 2024 -0700

    Arm: Consider the fact that targetReg can be second half during resolution (dotnet#107493)

    * Arm: Consider the fact that targetReg can be second half during resolution

    * add test case

    * Make sure we only handle float registers

    * fix test case's public methods

commit 18eedbe
Author: Aaron Robinson <[email protected]>
Date:   Mon Sep 9 14:02:51 2024 -0700

    Convert Thread FCalls to QCalls (dotnet#107495)

    * Convert Thread.IsAlive property

    * Convert Thread.GetCurrentThread()

    * Convert Thread.ThreadState property

    * Convert Thread.Initialize()

commit d45ccfd
Author: Michal Strehovský <[email protected]>
Date:   Tue Sep 10 05:28:57 2024 +0900

    Fix reflection-calling `Set` method on arrays (dotnet#107529)

    The test added in dotnet#106787 found an issue in the implementation of reflection calls to array `Set` methods. We used to throw the wrong exception type. There were probably other corner case bugs (like what exception is thrown when both element type is wrong and index is out of range and when/how value coercion should happen). This should fix that.

commit c534080
Author: Tom McDonald <[email protected]>
Date:   Mon Sep 9 15:21:41 2024 -0400

    Avoid using OpenThread for out of process SetThreadContext debugging (dotnet#107511)

    * Avoid using OpenThread in out of process thread context scenarios

    * Add comments

    * Update src/coreclr/debug/di/process.cpp

    Co-authored-by: mikelle-rogers <[email protected]>

    * Update src/coreclr/debug/di/process.cpp

    Co-authored-by: mikelle-rogers <[email protected]>

    * Update src/coreclr/debug/di/process.cpp

    Co-authored-by: Noah Falk <[email protected]>

    ---------

    Co-authored-by: mikelle-rogers <[email protected]>
    Co-authored-by: Noah Falk <[email protected]>

commit d2c7db0
Author: Tanner Gooding <[email protected]>
Date:   Mon Sep 9 11:06:45 2024 -0700

    Disable TensorExtensionsTwoSpanInFloatOut due to dotnet#107254 (dotnet#107555)

commit b7b91cb
Author: Aaron Robinson <[email protected]>
Date:   Mon Sep 9 09:08:31 2024 -0700

    Convert some handle APIs to QCalls (dotnet#107513)

    Convert RuntimeTypeHandle.GetAssembly()
    Convert RuntimeTypeHandle.GetModule()
    Convert RuntimeAssembly.GetManifestModule()

commit 600f6bd
Author: David Wrighton <[email protected]>
Date:   Mon Sep 9 09:04:51 2024 -0700

    Fix thread static cleanup paths (dotnet#107438)

    * Fix thread static cleanup paths
    - Do not destroy GC handles while holding the spin lock
    - Free the pLoaderHandle array when the thread is terminated

    * When using a ThreadStatics stress test on collectible assemblies, a few more issues were found
    - Fix issue where the LoaderAllocator's SegmentedHandleIndex wasn't being freed
    - Fix issue where the logic to re-use TLSIndex values wasn't working properly

commit fe7a52d
Author: Linus Hamlin <[email protected]>
Date:   Mon Sep 9 17:57:31 2024 +0200

    Remove ActiveIssue for solved issues in Vector tests (dotnet#107127)

commit 0c33c6f
Author: Elinor Fung <[email protected]>
Date:   Mon Sep 9 08:21:16 2024 -0700

    Fix module being set as tenured too early (dotnet#107489)

commit 2fb3629
Author: Elinor Fung <[email protected]>
Date:   Mon Sep 9 08:03:27 2024 -0700

    Remove `BaseDomain` use in `LoaderAllocator` and event tracing helpers (dotnet#107481)

    - Remove `BaseDomain` member on `LoaderAllocator`
      - Add asserts in functions using `AppDomain` that the loader allocator is collectible and the type is `LAT_Assembly` (so `AssemblyLoaderAllocator` which always had `AppDomain`)
    - Remove unnecessary `BaseDomain`/`AppDomain` parameters from event tracing helpers
      - They were always being called with the current app domain

commit 62133e0
Author: dotnet-maestro[bot] <42748379+dotnet-maestro[bot]@users.noreply.github.com>
Date:   Mon Sep 9 16:56:30 2024 +0200

    [main] Update dependencies from dotnet/xharness (dotnet#107291)

    * Update dependencies from https://github.com/dotnet/xharness build 20240902.2

    Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Common , Microsoft.DotNet.XHarness.TestRunners.Xunit
     From Version 9.0.0-prerelease.24452.1 -> To Version 9.0.0-prerelease.24452.2

    * Update dependencies from https://github.com/dotnet/xharness build 20240903.1

    Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Common , Microsoft.DotNet.XHarness.TestRunners.Xunit
     From Version 9.0.0-prerelease.24452.2 -> To Version 9.0.0-prerelease.24453.1

    * Update dependencies from https://github.com/dotnet/xharness build 20240904.2

    Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Common , Microsoft.DotNet.XHarness.TestRunners.Xunit
     From Version 9.0.0-prerelease.24453.1 -> To Version 10.0.0-prerelease.24454.2

    * Update dependencies from https://github.com/dotnet/xharness build 20240906.1

    Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Common , Microsoft.DotNet.XHarness.TestRunners.Xunit
     From Version 10.0.0-prerelease.24454.2 -> To Version 10.0.0-prerelease.24456.1

    * Update dependencies from https://github.com/dotnet/xharness build 20240909.1

    Microsoft.DotNet.XHarness.CLI , Microsoft.DotNet.XHarness.TestRunners.Common , Microsoft.DotNet.XHarness.TestRunners.Xunit
     From Version 10.0.0-prerelease.24456.1 -> To Version 10.0.0-prerelease.24459.1

    ---------

    Co-authored-by: dotnet-maestro[bot] <dotnet-maestro[bot]@users.noreply.github.com>
    Co-authored-by: Ilona Tomkowicz <[email protected]>

commit 4c0973e
Author: Jeremi Kurdek <[email protected]>
Date:   Mon Sep 9 17:53:45 2024 +0300

    Fix passing assemblies using relative path (dotnet#107536)

commit 67e5768
Author: Katelyn Gadd <[email protected]>
Date:   Mon Sep 9 06:19:10 2024 -0700

    [wasm] Implement MINT_NEWARR in jiterpreter (dotnet#107430)

commit 176754d
Author: Matous Kozak <[email protected]>
Date:   Mon Sep 9 13:35:01 2024 +0200

    [mono][infra] decrease CPU count for fullAOT CI build (dotnet#107531)

commit 49bf719
Author: Pavel Savara <[email protected]>
Date:   Mon Sep 9 12:30:47 2024 +0200

    [browser][MT] fix feature detection on webworker (dotnet#107452)

commit aa418fc
Author: Preeyan Parmar <[email protected]>
Date:   Sun Sep 8 22:44:27 2024 +0100

    Remove unused declarations from clsload.hpp (dotnet#107509)

    * Remove unused declarations from clsload.hpp

    * also remove unused ClassLoader::TryEnsureLoaded

commit 7d68c7f
Author: Steve <[email protected]>
Date:   Mon Sep 9 06:36:18 2024 +0900

    Implement getClassAssemblyName (dotnet#106959)

    * Add getClassAssemblyName

    * Handle nullptrs

    * Remove CORINFO_ASSEMBLY_HANDLE

    * Address feedbacks

    Co-authored-by: Jan Kotas <[email protected]>

commit 39c84a3
Author: Jan Kotas <[email protected]>
Date:   Sun Sep 8 11:24:13 2024 -0700

    Fix corner-case accounting bug in new codeheap allocation (dotnet#107492)

    The size of internal CodeHeap structures was not included in
    codeheap memory reservation. It caused false OOM exception to
    be thrown when JITed method code size was near 64kB multiple

commit 10f6c4c
Author: Aaron Robinson <[email protected]>
Date:   Sun Sep 8 11:02:41 2024 -0700

    Convert WaitHandle FCalls to QCalls (dotnet#107488)

commit b523ec5
Author: Aman Khalid <[email protected]>
Date:   Sun Sep 8 14:42:04 2024 +0000

    JIT: Simplify block insertion logic during loop canonicalization (dotnet#107371)

Author: lewing

.config/dotnet-tools.json

@@ -15,7 +15,7 @@
       ]
     },
     "microsoft.dotnet.xharness.cli": {
-      "version": "9.0.0-prerelease.24452.1",
+      "version": "10.0.0-prerelease.24459.1",
       "commands": [
         "xharness"
       ]

eng/Version.Details.xml

@@ -316,17 +316,17 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>7cb32e193a55a95c74fc3bd56501b951b48b700f</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Common" Version="9.0.0-prerelease.24452.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Common" Version="10.0.0-prerelease.24459.1">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>c2215b88cdac5390888de3e6ad301c113f40ed6c</Sha>
+      <Sha>df9b6509e6b3976d158e46c23d72d6acd9f0d326</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="9.0.0-prerelease.24452.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.TestRunners.Xunit" Version="10.0.0-prerelease.24459.1">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>c2215b88cdac5390888de3e6ad301c113f40ed6c</Sha>
+      <Sha>df9b6509e6b3976d158e46c23d72d6acd9f0d326</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.XHarness.CLI" Version="9.0.0-prerelease.24452.1">
+    <Dependency Name="Microsoft.DotNet.XHarness.CLI" Version="10.0.0-prerelease.24459.1">
       <Uri>https://github.com/dotnet/xharness</Uri>
-      <Sha>c2215b88cdac5390888de3e6ad301c113f40ed6c</Sha>
+      <Sha>df9b6509e6b3976d158e46c23d72d6acd9f0d326</Sha>
     </Dependency>
     <Dependency Name="Microsoft.DotNet.PackageTesting" Version="9.0.0-beta.24423.2">
       <Uri>https://github.com/dotnet/arcade</Uri>

eng/Versions.props

@@ -180,9 +180,9 @@
     <!-- Testing -->
     <MicrosoftNETCoreCoreDisToolsVersion>1.4.0</MicrosoftNETCoreCoreDisToolsVersion>
     <MicrosoftNETTestSdkVersion>17.4.0-preview-20220707-01</MicrosoftNETTestSdkVersion>
-    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>9.0.0-prerelease.24452.1</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
-    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>9.0.0-prerelease.24452.1</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
-    <MicrosoftDotNetXHarnessCLIVersion>9.0.0-prerelease.24452.1</MicrosoftDotNetXHarnessCLIVersion>
+    <MicrosoftDotNetXHarnessTestRunnersCommonVersion>10.0.0-prerelease.24459.1</MicrosoftDotNetXHarnessTestRunnersCommonVersion>
+    <MicrosoftDotNetXHarnessTestRunnersXunitVersion>10.0.0-prerelease.24459.1</MicrosoftDotNetXHarnessTestRunnersXunitVersion>
+    <MicrosoftDotNetXHarnessCLIVersion>10.0.0-prerelease.24459.1</MicrosoftDotNetXHarnessCLIVersion>
     <MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>9.0.0-alpha.0.24419.1</MicrosoftDotNetHotReloadUtilsGeneratorBuildToolVersion>
     <NUnitVersion>3.12.0</NUnitVersion>
     <NUnit3TestAdapterVersion>4.5.0</NUnit3TestAdapterVersion>

eng/pipelines/common/templates/runtimes/build-runtime-tests-and-send-to-helix.yml

@@ -70,7 +70,7 @@ steps:
           displayName: "AOT compile CoreCLR tests"
           target: ${{ coalesce(parameters.llvmAotStepContainer, parameters.container) }}
       - ${{ if in(parameters.runtimeVariant, 'llvmfullaot', 'minifullaot') }}:
-        - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(logRootNameArg)MonoAot mono_fullaot ${{ parameters.buildConfig }} ${{ parameters.archType }} /p:RuntimeVariant=${{ parameters.runtimeVariant }} -maxcpucount:2
+        - script: $(Build.SourcesDirectory)/src/tests/build$(scriptExt) $(logRootNameArg)MonoAot mono_fullaot ${{ parameters.buildConfig }} ${{ parameters.archType }} /p:RuntimeVariant=${{ parameters.runtimeVariant }} -maxcpucount:1
           displayName: "AOT compile CoreCLR tests"
           target: ${{ coalesce(parameters.llvmAotStepContainer, parameters.container) }}
     - ${{ if eq(parameters.archType, 'arm64') }}:

src/coreclr/System.Private.CoreLib/src/System/Reflection/RuntimeAssembly.cs

@@ -115,8 +115,6 @@ public override string? CodeBase
             }
         }
 
-        internal RuntimeAssembly GetNativeHandle() => this;
-
         // If the assembly is copied before it is loaded, the codebase will be set to the
         // actual file loaded if copiedName is true. If it is false, then the original code base
         // is returned.
@@ -263,7 +261,7 @@ public override Type[] GetExportedTypes()
         public override IEnumerable<TypeInfo> DefinedTypes
         {
             [RequiresUnreferencedCode("Types might be removed")]
-            get => GetManifestModule(GetNativeHandle()).GetDefinedTypes();
+            get => GetManifestModule().GetDefinedTypes();
         }
 
         [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "AssemblyNative_GetIsCollectible")]
@@ -324,7 +322,7 @@ public override void GetObjectData(SerializationInfo info, StreamingContext cont
         public override Module ManifestModule =>
             // We don't need to return the "external" ModuleBuilder because
             // it is meant to be read-only
-            GetManifestModule(GetNativeHandle());
+            GetManifestModule();
 
         public override object[] GetCustomAttributes(bool inherit)
         {
@@ -586,9 +584,17 @@ private CultureInfo GetLocale()
         }
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern bool FCallIsDynamic(RuntimeAssembly assembly);
+        private static extern bool GetIsDynamic(IntPtr assembly);
 
-        public override bool IsDynamic => FCallIsDynamic(GetNativeHandle());
+        public override bool IsDynamic
+        {
+            get
+            {
+                bool isDynamic = GetIsDynamic(GetUnderlyingNativeHandle());
+                GC.KeepAlive(this); // We directly pass the native handle above - make sure this object stays alive for the call
+                return isDynamic;
+            }
+        }
 
         [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "AssemblyNative_GetSimpleName")]
         private static partial void GetSimpleName(QCallAssembly assembly, StringHandleOnStack retSimpleName);
@@ -701,8 +707,24 @@ public override Module[] GetLoadedModules(bool getResourceModules)
             return GetModulesInternal(false, getResourceModules);
         }
 
+        private RuntimeModule GetManifestModule()
+        {
+            return GetManifestModule(this) ?? GetManifestModuleWorker(this);
+
+            [MethodImpl(MethodImplOptions.NoInlining)]
+            static RuntimeModule GetManifestModuleWorker(RuntimeAssembly assembly)
+            {
+                RuntimeModule? module = null;
+                GetManifestModuleSlow(ObjectHandleOnStack.Create(ref assembly), ObjectHandleOnStack.Create(ref module));
+                return module!;
+            }
+        }
+
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern RuntimeModule GetManifestModule(RuntimeAssembly assembly);
+        private static extern RuntimeModule? GetManifestModule(RuntimeAssembly assembly);
+
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "AssemblyHandle_GetManifestModuleSlow")]
+        private static partial void GetManifestModuleSlow(ObjectHandleOnStack assembly, ObjectHandleOnStack module);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern int GetToken(RuntimeAssembly assembly);
@@ -713,7 +735,7 @@ public sealed override Type[] GetForwardedTypes()
             List<Type> types = new List<Type>();
             List<Exception> exceptions = new List<Exception>();
 
-            MetadataImport scope = GetManifestModule(GetNativeHandle()).MetadataImport;
+            MetadataImport scope = GetManifestModule().MetadataImport;
             scope.Enum(MetadataTokenType.ExportedType, 0, out MetadataEnumResult enumResult);
             RuntimeAssembly runtimeAssembly = this;
             QCallAssembly pAssembly = new QCallAssembly(ref runtimeAssembly);

src/coreclr/System.Private.CoreLib/src/System/Reflection/RuntimeCustomAttributeData.cs

@@ -82,7 +82,7 @@ internal static IList<CustomAttributeData> GetCustomAttributesInternal(RuntimeAs
 
             // No pseudo attributes for RuntimeAssembly
 
-            return GetCustomAttributes((RuntimeModule)target.ManifestModule, RuntimeAssembly.GetToken(target.GetNativeHandle()));
+            return GetCustomAttributes((RuntimeModule)target.ManifestModule, RuntimeAssembly.GetToken(target));
         }
 
         internal static IList<CustomAttributeData> GetCustomAttributesInternal(RuntimeParameterInfo target)
@@ -1227,7 +1227,7 @@ internal static bool IsDefined(RuntimeAssembly assembly, RuntimeType caType)
             Debug.Assert(caType is not null);
 
             // No pseudo attributes for RuntimeAssembly
-            return IsCustomAttributeDefined((assembly.ManifestModule as RuntimeModule)!, RuntimeAssembly.GetToken(assembly.GetNativeHandle()), caType);
+            return IsCustomAttributeDefined((assembly.ManifestModule as RuntimeModule)!, RuntimeAssembly.GetToken(assembly), caType);
         }
 
         internal static bool IsDefined(RuntimeModule module, RuntimeType caType)
@@ -1388,7 +1388,7 @@ internal static object[] GetCustomAttributes(RuntimeAssembly assembly, RuntimeTy
 
             // No pseudo attributes for RuntimeAssembly
 
-            int assemblyToken = RuntimeAssembly.GetToken(assembly.GetNativeHandle());
+            int assemblyToken = RuntimeAssembly.GetToken(assembly);
             return GetCustomAttributes((assembly.ManifestModule as RuntimeModule)!, assemblyToken, 0, caType);
         }
 

src/coreclr/System.Private.CoreLib/src/System/RuntimeHandles.cs

@@ -306,11 +306,43 @@ internal RuntimeType GetRuntimeType()
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern CorElementType GetCorElementType(RuntimeType type);
 
+        internal static RuntimeAssembly GetAssembly(RuntimeType type)
+        {
+            return GetAssemblyIfExists(type) ?? GetAssemblyWorker(type);
+
+            [MethodImpl(MethodImplOptions.NoInlining)]
+            static RuntimeAssembly GetAssemblyWorker(RuntimeType type)
+            {
+                RuntimeAssembly? assembly = null;
+                GetAssemblySlow(ObjectHandleOnStack.Create(ref type), ObjectHandleOnStack.Create(ref assembly));
+                return assembly!;
+            }
+        }
+
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern RuntimeAssembly GetAssembly(RuntimeType type);
+        private static extern RuntimeAssembly? GetAssemblyIfExists(RuntimeType type);
+
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "RuntimeTypeHandle_GetAssemblySlow")]
+        private static partial void GetAssemblySlow(ObjectHandleOnStack type, ObjectHandleOnStack assembly);
+
+        internal static RuntimeModule GetModule(RuntimeType type)
+        {
+            return GetModuleIfExists(type) ?? GetModuleWorker(type);
+
+            [MethodImpl(MethodImplOptions.NoInlining)]
+            static RuntimeModule GetModuleWorker(RuntimeType type)
+            {
+                RuntimeModule? module = null;
+                GetModuleSlow(ObjectHandleOnStack.Create(ref type), ObjectHandleOnStack.Create(ref module));
+                return module!;
+            }
+        }
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern RuntimeModule GetModule(RuntimeType type);
+        private static extern RuntimeModule? GetModuleIfExists(RuntimeType type);
+
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "RuntimeTypeHandle_GetModuleSlow")]
+        private static partial void GetModuleSlow(ObjectHandleOnStack type, ObjectHandleOnStack module);
 
         public ModuleHandle GetModuleHandle()
         {

src/coreclr/System.Private.CoreLib/src/System/Threading/LowLevelLifoSemaphore.Unix.cs

@@ -31,7 +31,7 @@ public bool WaitCore(int timeoutMs)
             return waitResult == WaitHandle.WaitSuccess;
         }
 
-        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "WaitHandle_CorWaitOnePrioritizedNative")]
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "WaitHandle_WaitOnePrioritized")]
         private static partial int WaitNative(SafeWaitHandle handle, int timeoutMs);
 
         private void ReleaseCore(int count)

src/coreclr/System.Private.CoreLib/src/System/Threading/Thread.CoreCLR.cs

@@ -151,13 +151,24 @@ public static void SpinWait(int iterations)
         public static bool Yield() => YieldInternal() != Interop.BOOL.FALSE;
 
         [MethodImpl(MethodImplOptions.NoInlining)]
-        private static Thread InitializeCurrentThread() => t_currentThread = GetCurrentThreadNative();
+        private static Thread InitializeCurrentThread()
+        {
+            Thread? thread = null;
+            GetCurrentThread(ObjectHandleOnStack.Create(ref thread));
+            return t_currentThread = thread!;
+        }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern Thread GetCurrentThreadNative();
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "ThreadNative_GetCurrentThread")]
+        private static partial void GetCurrentThread(ObjectHandleOnStack thread);
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private extern void Initialize();
+        private void Initialize()
+        {
+            Thread _this = this;
+            Initialize(ObjectHandleOnStack.Create(ref _this));
+        }
+
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "ThreadNative_Initialize")]
+        private static partial void Initialize(ObjectHandleOnStack thread);
 
         /// <summary>Clean up the thread when it goes away.</summary>
         ~Thread() => InternalFinalize(); // Delegate to the unmanaged portion.
@@ -175,11 +186,7 @@ partial void ThreadNameChanged(string? value)
         private static partial void InformThreadNameChange(ThreadHandle t, string? name, int len);
 
         /// <summary>Returns true if the thread has been started and is not dead.</summary>
-        public extern bool IsAlive
-        {
-            [MethodImpl(MethodImplOptions.InternalCall)]
-            get;
-        }
+        public bool IsAlive => (ThreadState & (ThreadState.Unstarted | ThreadState.Stopped | ThreadState.Aborted)) == 0;
 
         /// <summary>
         /// Return whether or not this thread is a background thread.  Background
@@ -247,10 +254,19 @@ public ThreadPriority Priority
         /// Return the thread state as a consistent set of bits.  This is more
         /// general then IsAlive or IsBackground.
         /// </summary>
-        public ThreadState ThreadState => (ThreadState)GetThreadStateNative();
+        public ThreadState ThreadState
+        {
+            get
+            {
+                var state = (ThreadState)GetThreadState(GetNativeHandle());
+                GC.KeepAlive(this);
+                return state;
+            }
+        }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private extern int GetThreadStateNative();
+        [SuppressGCTransition]
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "ThreadNative_GetThreadState")]
+        private static partial int GetThreadState(ThreadHandle t);
 
         /// <summary>
         /// An unstarted thread can be marked to indicate that it will host a
@@ -327,6 +343,7 @@ public void DisableComObjectEagerCleanup()
             GC.KeepAlive(this);
         }
 
+        [SuppressGCTransition]
         [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "ThreadNative_DisableComObjectEagerCleanup")]
         private static partial void DisableComObjectEagerCleanup(ThreadHandle t);
 #else // !FEATURE_COMINTEROP

src/coreclr/System.Private.CoreLib/src/System/Threading/WaitHandle.CoreCLR.cs

@@ -8,23 +8,18 @@ namespace System.Threading
 {
     public abstract partial class WaitHandle
     {
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern int WaitOneCore(IntPtr waitHandle, int millisecondsTimeout, bool useTrivialWaits);
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "WaitHandle_WaitOneCore")]
+        private static partial int WaitOneCore(IntPtr waitHandle, int millisecondsTimeout, [MarshalAs(UnmanagedType.Bool)] bool useTrivialWaits);
 
         private static unsafe int WaitMultipleIgnoringSyncContextCore(ReadOnlySpan<IntPtr> waitHandles, bool waitAll, int millisecondsTimeout)
-        {
-            fixed (IntPtr* pWaitHandles = &MemoryMarshal.GetReference(waitHandles))
-            {
-                return WaitMultipleIgnoringSyncContext(pWaitHandles, waitHandles.Length, waitAll, millisecondsTimeout);
-            }
-        }
+            => WaitMultipleIgnoringSyncContext(waitHandles, waitHandles.Length, waitAll, millisecondsTimeout);
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern unsafe int WaitMultipleIgnoringSyncContext(IntPtr* waitHandles, int numHandles, bool waitAll, int millisecondsTimeout);
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "WaitHandle_WaitMultipleIgnoringSyncContext")]
+        private static partial int WaitMultipleIgnoringSyncContext(ReadOnlySpan<IntPtr> waitHandles, int numHandles, [MarshalAs(UnmanagedType.Bool)] bool waitAll, int millisecondsTimeout);
 
         private static int SignalAndWaitCore(IntPtr waitHandleToSignal, IntPtr waitHandleToWaitOn, int millisecondsTimeout)
         {
-            int ret = SignalAndWaitNative(waitHandleToSignal, waitHandleToWaitOn, millisecondsTimeout);
+            int ret = SignalAndWait(waitHandleToSignal, waitHandleToWaitOn, millisecondsTimeout);
 
             if (ret == Interop.Errors.ERROR_TOO_MANY_POSTS)
             {
@@ -34,7 +29,7 @@ private static int SignalAndWaitCore(IntPtr waitHandleToSignal, IntPtr waitHandl
             return ret;
         }
 
-        [MethodImpl(MethodImplOptions.InternalCall)]
-        private static extern int SignalAndWaitNative(IntPtr waitHandleToSignal, IntPtr waitHandleToWaitOn, int millisecondsTimeout);
+        [LibraryImport(RuntimeHelpers.QCall, EntryPoint = "WaitHandle_SignalAndWait")]
+        private static partial int SignalAndWait(IntPtr waitHandleToSignal, IntPtr waitHandleToWaitOn, int millisecondsTimeout);
     }
 }