[NativeAOT] Enable CI for macOS x64/arm64 (#75421)

* [NativeAOT] Enable CI for macOS x64/arm64

* Update CppCompilerAndLinker condition

* Enable NativeAOT osx-arm64 build in regular runtime pipeline

* Enable cross-compilation on macOS

* Fix HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP when cross-compiling

* Update OSVersion_ValidVersion_OSX test on NativeAOT

The test tries to validate Environment.OSVersion.Version which works correctly. RuntimeInformation.RuntimeIdentifier, however, doesn't use versioned RIDs when NativeAOT is used.

* Add hack to stop linker from corrupting DWARF CFI, bump darwin version in triple to get compact unwinding tables generated

* Bump ObjWriter packages

* Disable MessageSendTests on NativeAOT
Co-authored-by: NAdeel <3840695+am11@users.noreply.github.com>
Co-authored-by: NJan Kotas <jkotas@microsoft.com>

eng/Version.Details.xml

@@ -16,69 +16,69 @@
       <Uri>https://github.com/dotnet/wcf</Uri>
       <Sha>7f504aabb1988e9a093c1e74d8040bd52feb2f01</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.linux-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.linux-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.win-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.win-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.win-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.win-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.osx.11.0-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.osx.11.0-arm64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.osx.10.12-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22458.3">
+    <Dependency Name="runtime.osx.10.12-x64.Microsoft.NETCore.Runtime.ObjWriter" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>8688ea2538ef1287c6619d35a26b5750d355cc18</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.linux-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.linux-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.linux-musl-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.linux-musl-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>754d13817d834b716d339183e21aac7d2489c496</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.win-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.win-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.win-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.win-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.osx.11.0-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.osx.11.0-arm64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
-    <Dependency Name="runtime.osx.10.12-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22431.4">
+    <Dependency Name="runtime.osx.10.12-x64.Microsoft.NETCore.Runtime.JIT.Tools" Version="1.0.0-alpha.1.22478.1">
       <Uri>https://github.com/dotnet/llvm-project</Uri>
-      <Sha>c1304304028d603e34f6803b0740c34441f80d2e</Sha>
+      <Sha>2e1187ef495010c65842a001f34c46006d5a01bc</Sha>
     </Dependency>
     <Dependency Name="System.CommandLine" Version="2.0.0-beta4.22355.1">
       <Uri>https://github.com/dotnet/command-line-api</Uri>

eng/Versions.props

@@ -80,14 +80,14 @@
     <MicrosoftExtensionsDependencyModelVersion>6.0.0</MicrosoftExtensionsDependencyModelVersion>
     <!-- CoreClr dependencies -->
     <MicrosoftNETCoreILAsmVersion>8.0.0-alpha.1.22475.4</MicrosoftNETCoreILAsmVersion>
-    <runtimelinuxarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimelinuxarm64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimelinuxx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimelinuxx64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimelinuxmuslx64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimewinarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimewinarm64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimewinx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimewinx64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimeosx110arm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimeosx110arm64MicrosoftNETCoreRuntimeObjWriterVersion>
-    <runtimeosx1012x64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22458.3</runtimeosx1012x64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimelinuxarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimelinuxarm64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimelinuxx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimelinuxx64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimelinuxmuslx64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimewinarm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimewinarm64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimewinx64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimewinx64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimeosx110arm64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimeosx110arm64MicrosoftNETCoreRuntimeObjWriterVersion>
+    <runtimeosx1012x64MicrosoftNETCoreRuntimeObjWriterVersion>1.0.0-alpha.1.22478.1</runtimeosx1012x64MicrosoftNETCoreRuntimeObjWriterVersion>
     <!-- Libraries dependencies -->
     <MicrosoftBclAsyncInterfacesVersion>6.0.0</MicrosoftBclAsyncInterfacesVersion>
     <MicrosoftBclHashCodeVersion>1.1.1</MicrosoftBclHashCodeVersion>
@@ -206,13 +206,13 @@
     <WixPackageVersion>1.0.0-v3.14.0.5722</WixPackageVersion>
     <MonoWorkloadManifestVersion>6.0.0-preview.5.21275.7</MonoWorkloadManifestVersion>
     <!-- JIT Tools -->
-    <runtimelinuxarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimelinuxarm64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimelinuxx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimelinuxx64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimelinuxmuslx64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimewinarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimewinarm64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimewinx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimewinx64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimeosx110arm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimeosx110arm64MicrosoftNETCoreRuntimeJITToolsVersion>
-    <runtimeosx1012x64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22431.4</runtimeosx1012x64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimelinuxarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimelinuxarm64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimelinuxx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimelinuxx64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimelinuxmuslarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimelinuxmuslarm64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimelinuxmuslx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimelinuxmuslx64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimewinarm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimewinarm64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimewinx64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimewinx64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimeosx110arm64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimeosx110arm64MicrosoftNETCoreRuntimeJITToolsVersion>
+    <runtimeosx1012x64MicrosoftNETCoreRuntimeJITToolsVersion>1.0.0-alpha.1.22478.1</runtimeosx1012x64MicrosoftNETCoreRuntimeJITToolsVersion>
   </PropertyGroup>
 </Project>

eng/native/tryrun.cmake

@@ -64,7 +64,7 @@ if(DARWIN)
     set_cache_value(SSCANF_CANNOT_HANDLE_MISSING_EXPONENT_EXITCODE 1)
     set_cache_value(SSCANF_SUPPORT_ll_EXITCODE 0)
     set_cache_value(UNGETC_NOT_RETURN_EOF_EXITCODE 1)
-    set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 0)
+    set_cache_value(HAVE_SHM_OPEN_THAT_WORKS_WELL_ENOUGH_WITH_MMAP_EXITCODE 1)
   else()
     message(FATAL_ERROR "Arch is ${TARGET_ARCH_NAME}. Only arm64 or x64 is supported for OSX cross build!")
   endif()

eng/pipelines/runtime-extra-platforms-other.yml

@@ -84,6 +84,8 @@ jobs:
     platforms:
     - windows_x64
     - windows_arm64
+    - OSX_x64
+    - OSX_arm64
     - Linux_x64
     - Linux_arm64
     - Linux_musl_x64

eng/pipelines/runtime.yml

@@ -273,6 +273,7 @@ jobs:
     platforms:
     - windows_arm64
     - Linux_arm64
+    - OSX_arm64
     jobParameters:
       testGroup: innerloop
       isSingleFile: true

eng/testing/tests.singlefile.targets

@@ -21,8 +21,8 @@
   <PropertyGroup Condition="'$(TestNativeAot)' == 'true'">
     <IlcToolsPath>$(CoreCLRILCompilerDir)</IlcToolsPath>
     <IlcToolsPath Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)'">$(CoreCLRCrossILCompilerDir)</IlcToolsPath>
-    <CppCompilerAndLinker Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' != 'windows' and '$(RuntimeIdentifier)' == 'linux-musl-arm64'">clang-15</CppCompilerAndLinker>
-    <CppCompilerAndLinker Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' != 'windows' and '$(RuntimeIdentifier)' != 'linux-musl-arm64'">clang-9</CppCompilerAndLinker>
+    <CppCompilerAndLinker Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' == 'linux' and '$(RuntimeIdentifier)' == 'linux-musl-arm64'">clang-15</CppCompilerAndLinker>
+    <CppCompilerAndLinker Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' == 'linux' and '$(RuntimeIdentifier)' != 'linux-musl-arm64'">clang-9</CppCompilerAndLinker>
     <SysRoot Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' and '$(HostOS)' != 'windows'">$(ROOTFS_DIR)</SysRoot>
     <IlcBuildTasksPath>$(CoreCLRILCompilerDir)netstandard/ILCompiler.Build.Tasks.dll</IlcBuildTasksPath>
     <IlcSdkPath>$(CoreCLRAotSdkDir)</IlcSdkPath>

src/coreclr/nativeaot/BuildIntegration/Microsoft.DotNet.ILCompiler.SingleEntry.targets

@@ -23,6 +23,8 @@
     <OSHostArch Condition="$([MSBuild]::IsOSPlatform('Windows')) and
         $([System.Environment]::GetEnvironmentVariable('PROCESSOR_ARCHITECTURE', EnvironmentVariableTarget.Machine)) == 'ARM64'">arm64</OSHostArch>
 
+    <OSHostArch Condition="$([MSBuild]::IsOSPlatform('osx')) and '$(CrossBuild)' == 'true'">x64</OSHostArch>
+
     <IlcHostArch Condition="'$(IlcHostArch)' == ''">$(OSHostArch)</IlcHostArch>
     <IlcHostPackageName>runtime.$(OSIdentifier)-$(IlcHostArch).Microsoft.DotNet.ILCompiler</IlcHostPackageName>
     

src/coreclr/nativeaot/BuildIntegration/Microsoft.NETCore.Native.Unix.targets

@@ -29,11 +29,12 @@ The .NET Foundation licenses this file to you under the MIT license.
       <FullRuntimeName Condition="'$(ServerGarbageCollection)' == 'true'">libRuntime.ServerGC</FullRuntimeName>
 
       <CrossCompileRid />
-      <CrossCompileRid Condition="'$(TargetOS)' != 'OSX' and !$(RuntimeIdentifier.EndsWith('-$(OSHostArch)'))">$(RuntimeIdentifier)</CrossCompileRid>
+      <CrossCompileRid Condition="!$(RuntimeIdentifier.EndsWith('-$(OSHostArch)'))">$(RuntimeIdentifier)</CrossCompileRid>
 
       <CrossCompileArch />
       <CrossCompileArch Condition="$(CrossCompileRid.EndsWith('-x64'))">x86_64</CrossCompileArch>
-      <CrossCompileArch Condition="$(CrossCompileRid.EndsWith('-arm64'))">aarch64</CrossCompileArch>
+      <CrossCompileArch Condition="$(CrossCompileRid.EndsWith('-arm64')) and '$(TargetOS)' != 'OSX'">aarch64</CrossCompileArch>
+      <CrossCompileArch Condition="$(CrossCompileRid.EndsWith('-arm64')) and '$(TargetOS)' == 'OSX'">arm64</CrossCompileArch>
 
       <TargetTriple />
       <TargetTriple Condition="'$(CrossCompileArch)' != ''">$(CrossCompileArch)-linux-gnu</TargetTriple>
@@ -85,7 +86,8 @@ The .NET Foundation licenses this file to you under the MIT license.
     <ItemGroup>
       <LinkerArg Include="@(NativeLibrary)" />
       <LinkerArg Include="--sysroot=$(SysRoot)" Condition="'$(SysRoot)' != ''" />
-      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(TargetTriple)' != ''" />
+      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(TargetOS)' != 'OSX' and '$(TargetTriple)' != ''" />
+      <LinkerArg Include="-arch $(CrossCompileArch)" Condition="'$(TargetOS)' == 'OSX' and '$(CrossCompileArch)' != ''" />
       <LinkerArg Include="-g" Condition="$(NativeDebugSymbols) == 'true'" />
       <LinkerArg Include="-Wl,--strip-debug" Condition="$(NativeDebugSymbols) != 'true' and '$(TargetOS)' != 'OSX'" />
       <LinkerArg Include="-Wl,-rpath,'$(IlcRPath)'" />

src/coreclr/tools/aot/ILCompiler.Compiler/Compiler/DependencyAnalysis/ObjectWriter.cs

@@ -713,6 +713,18 @@ public void EmitCFICodes(int offset)
                     // Internal compiler error
                     Debug.Assert(false);
                 }
+
+                if (_targetPlatform.OperatingSystem == TargetOS.OSX)
+                {
+                    // Emit a symbol for beginning of the frame. This is workaround for ld64
+                    // linker bug which would produce DWARF with incorrect pcStart offsets for
+                    // exception handling blocks if there is no symbol present for them.
+                    //
+                    // To make things simple we just reuse blobSymbolName and change `_lsda`
+                    // prefix to `_fram`.
+                    "_fram"u8.CopyTo(blobSymbolName);
+                    EmitSymbolDef(blobSymbolName);
+                }
             }
 
             // Emit individual cfi blob for the given offset
@@ -1272,7 +1284,7 @@ private static string GetLLVMTripleFromTarget(TargetDetails target)
                     break;
                 case TargetOS.OSX:
                     vendor = "apple";
-                    sys = "darwin";
+                    sys = "darwin16";
                     abi = "macho";
                     break;
                 case TargetOS.WebAssembly:

src/libraries/System.Runtime.Extensions/tests/System/EnvironmentTests.cs

@@ -186,9 +186,13 @@ public void OSVersion_ValidVersion_OSX()
         {
             Version version = Environment.OSVersion.Version;
 
-            // verify that the Environment.OSVersion.Version matches the current RID
-            // As of 12.0, only major version numbers are included in the RID
-            Assert.Contains(version.ToString(1), RuntimeInformation.RuntimeIdentifier);
+            // NativeAOT hard-codes the runtime identifier at build time
+            if (!PlatformDetection.IsNativeAot)
+            {
+                // verify that the Environment.OSVersion.Version matches the current RID
+                // As of 12.0, only major version numbers are included in the RID
+                Assert.Contains(version.ToString(1), RuntimeInformation.RuntimeIdentifier);
+            }
 
             Assert.True(version.Minor >= 0, "OSVersion Minor should be non-negative");
             Assert.True(version.Build >= 0, "OSVersion Build should be non-negative");

src/libraries/System.Runtime.InteropServices/tests/System.Runtime.InteropServices.UnitTests/System/Runtime/InteropServices/ObjectiveC/MessageSendTests.cs

@@ -16,6 +16,7 @@ namespace System.Runtime.InteropServices.Tests
 {
     [PlatformSpecific(TestPlatforms.OSX)]
     [SkipOnMono("Not currently implemented on Mono")]
+    [ConditionalClass(typeof(PlatformDetection), nameof(PlatformDetection.IsNotNativeAot))] // https://github.com/dotnet/runtimelab/issues/155
     public unsafe class MessageSendTests
     {
         private static int s_count = 1;