Fix architecture retrival

src/Microsoft.TestPlatform.CoreUtilities/Helpers/DotnetHostHelper.cs

@@ -119,7 +119,7 @@ private bool TryGetExecutablePath(string executableBaseName, out string executab
 
         public bool TryGetDotnetPathByArchitecture(PlatformArchitecture targetArchitecture, out string muxerPath)
         {
-            if (this.environment.Architecture == targetArchitecture)
+            if (this.processHelper.GetCurrentProcessArchitecture() == targetArchitecture)
             {
                 string currentProcessFileName = this.processHelper.GetCurrentProcessFileName();
                 if (Path.GetFileName(currentProcessFileName) != this.muxerName)

src/Microsoft.TestPlatform.PlatformAbstractions/common/System/ProcessHelper.cs

@@ -186,17 +186,6 @@ public int GetProcessId(object process)
             return proc?.Id ?? -1;
         }
 
-        /// <inheritdoc/>
-        public PlatformArchitecture GetCurrentProcessArchitecture()
-        {
-            if (IntPtr.Size == 8)
-            {
-                return PlatformArchitecture.X64;
-            }
-
-            return PlatformArchitecture.X86;
-        }
-
         /// <inheritdoc/>
         public string GetNativeDllDirectory()
         {

src/Microsoft.TestPlatform.PlatformAbstractions/net451/System/ProcessHelper.cs

@@ -23,6 +23,17 @@ public IntPtr GetProcessHandle(int processId)
         {
             return Process.GetProcessById(processId).Handle;
         }
+
+        /// <inheritdoc/>
+        public PlatformArchitecture GetCurrentProcessArchitecture()
+        {
+            if (IntPtr.Size == 8)
+            {
+                return PlatformArchitecture.X64;
+            }
+
+            return PlatformArchitecture.X86;
+        }
     }
 }
 

src/Microsoft.TestPlatform.PlatformAbstractions/netcore/System/ProcessHelper.cs

@@ -9,6 +9,7 @@ namespace Microsoft.VisualStudio.TestPlatform.PlatformAbstractions
     using System.Diagnostics;
     using System.IO;
     using System.Reflection;
+    using System.Runtime.InteropServices;
     using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
 
     public partial class ProcessHelper : IProcessHelper
@@ -26,6 +27,29 @@ public IntPtr GetProcessHandle(int processId)
             // If the handle has been marked invalid with SetHandleAsInvalid, this method still returns the original handle value, which can be a stale value.
             return Process.GetProcessById(processId).SafeHandle.DangerousGetHandle();
         }
+
+        public PlatformArchitecture GetCurrentProcessArchitecture()
+        {
+            switch (RuntimeInformation.ProcessArchitecture)
+            {
+                case Architecture.X86:
+                    return PlatformArchitecture.X86;
+                case Architecture.X64:
+                    return PlatformArchitecture.X64;
+                case Architecture.Arm:
+                    return PlatformArchitecture.ARM;
+                case Architecture.Arm64:
+                    return PlatformArchitecture.ARM64;
+
+                // The symbolic value is only available with .NET 6
+                // preview 6 or later, so use the numerical value for now.
+                // case System.Runtime.InteropServices.Architecture.S390x:
+                case (Architecture)5:
+                    return PlatformArchitecture.S390x;
+                default:
+                    throw new NotSupportedException();
+            }
+        }
     }
 }
 

src/Microsoft.TestPlatform.TestHostProvider/Hosting/DotnetTestHostManager.cs

@@ -406,7 +406,8 @@ public virtual TestProcessStartInfo GetTestHostProcessStartInfo(
                 // We silently force x64 only if the target architecture is the default one and is not specified by user
                 // through --arch or runsettings or -- RunConfiguration.TargetPlatform=arch
                 bool forceToX64 = SilentlyForceToX64() && this.runsettingHelper.IsDefaultTargetArchitecture;
-                bool isSameArchitecture = IsSameArchitecture(this.architecture, this.platformEnvironment.Architecture);
+                EqtTrace.Verbose($"DotnetTestHostmanager: Current process architetcure '{this.processHelper.GetCurrentProcessArchitecture()}'");
+                bool isSameArchitecture = IsSameArchitecture(this.architecture, this.processHelper.GetCurrentProcessArchitecture());
                 var currentProcessPath = this.processHelper.GetCurrentProcessFileName();
                 bool isRunningWithDotnetMuxer = IsRunningWithDotnetMuxer(currentProcessPath);
                 if (useCustomDotnetHostpath)
@@ -423,10 +424,10 @@ public virtual TestProcessStartInfo GetTestHostProcessStartInfo(
                 else
                 {
                     PlatformArchitecture targetArchitecture = TranslateToPlatformArchitecture(this.architecture);
-                    EqtTrace.Verbose($"DotnetTestHostmanager.LaunchTestHostAsync: Searching muxer for the architecture '{targetArchitecture}', OS '{this.platformEnvironment.OperatingSystem}' framework '{this.targetFramework}' SDK platform architecture '{this.platformEnvironment.Architecture}'");
+                    EqtTrace.Verbose($"DotnetTestHostmanager: Searching muxer for the architecture '{targetArchitecture}', OS '{this.platformEnvironment.OperatingSystem}' framework '{this.targetFramework}' SDK platform architecture '{this.platformEnvironment.Architecture}'");
                     if (forceToX64)
                     {
-                        EqtTrace.Verbose($"DotnetTestHostmanager.LaunchTestHostAsync: Forcing the search to x64 architecure, IsDefaultTargetArchitecture '{this.runsettingHelper.IsDefaultTargetArchitecture}' OS '{this.platformEnvironment.OperatingSystem}' framework '{this.targetFramework}'");
+                        EqtTrace.Verbose($"DotnetTestHostmanager: Forcing the search to x64 architecure, IsDefaultTargetArchitecture '{this.runsettingHelper.IsDefaultTargetArchitecture}' OS '{this.platformEnvironment.OperatingSystem}' framework '{this.targetFramework}'");
                     }
 
                     PlatformArchitecture finalTargetArchitecture = forceToX64 ? PlatformArchitecture.X64 : targetArchitecture;
@@ -440,7 +441,7 @@ public virtual TestProcessStartInfo GetTestHostProcessStartInfo(
                     startInfo.FileName = muxerPath;
                 }
 
-                EqtTrace.Verbose("DotnetTestHostmanager.LaunchTestHostAsync: Full path of testhost.dll is {0}", testHostPath);
+                EqtTrace.Verbose("DotnetTestHostmanager: Full path of testhost.dll is {0}", testHostPath);
                 args = "exec" + args;
                 args += " " + testHostPath.AddDoubleQuote();
             }

src/vstest.console/TestPlatformHelpers/TestRequestManager.cs

@@ -36,6 +36,7 @@ namespace Microsoft.VisualStudio.TestPlatform.CommandLine.TestPlatformHelpers
     using Microsoft.VisualStudio.TestPlatform.PlatformAbstractions.Interfaces;
     using Microsoft.VisualStudio.TestPlatform.Utilities;
     using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client.Payloads;
+    using Microsoft.VisualStudio.TestPlatform.Utilities.Helpers;
 
     /// <summary>
     /// Defines the test request manger which can fire off discovery and test run requests.
@@ -618,8 +619,9 @@ private bool UpdateRunSettingsIfRequired(
                         // it can be specified by user on the command line with --arch or through runsettings.
                         // If it's not specified by user will be filled by current processor architecture;
                         // should be the same as SDK.
-                        defaultArchitecture = runConfiguration.TargetPlatform;
-                        EqtTrace.Verbose($"Default architecture: {defaultArchitecture}");
+                        defaultArchitecture = RunSettingsHelper.Instance.IsDefaultTargetArchitecture ?
+                            TranslateToArchitecture(processHelper.GetCurrentProcessArchitecture()) :
+                            runConfiguration.TargetPlatform;
 #else
                         // We are running in vstest.console.exe that was built against .NET
                         // Framework. This console prefers 32-bit because it needs to run as 32-bit
@@ -630,6 +632,7 @@ private bool UpdateRunSettingsIfRequired(
                         // We want to find 64-bit SDK because it is more likely to be installed.
                         defaultArchitecture = Environment.Is64BitOperatingSystem ? Architecture.X64 : Architecture.X86;
 #endif
+                        EqtTrace.Verbose($"Default architecture: {defaultArchitecture} IsDefaultTargetArchitecture: {RunSettingsHelper.Instance.IsDefaultTargetArchitecture}");
                     }
 
                     settingsUpdated |= this.UpdatePlatform(
@@ -656,6 +659,27 @@ private bool UpdateRunSettingsIfRequired(
             }
 
             return settingsUpdated;
+
+#if NETCOREAPP
+            Architecture TranslateToArchitecture(PlatformArchitecture targetArchitecture)
+            {
+                switch (targetArchitecture)
+                {
+                    case PlatformArchitecture.X86:
+                        return Architecture.X86;
+                    case PlatformArchitecture.X64:
+                        return Architecture.X64;
+                    case PlatformArchitecture.ARM:
+                        return Architecture.ARM;
+                    case PlatformArchitecture.ARM64:
+                        return Architecture.ARM64;
+                    default:
+                        break;
+                }
+
+                throw new TestPlatformException($"Invalid target architecture '{targetArchitecture}'");
+            }
+#endif
         }
 
         private bool AddOrUpdateConsoleLogger(

test/Microsoft.TestPlatform.CoreUtilities.UnitTests/Helpers/DotnetHostHelperTest.cs

@@ -34,6 +34,7 @@ public void GetDotnetPathByArchitecture_SameArchitecture()
             environmentHelper.SetupGet(x => x.OperatingSystem).Returns(PlatformOperatingSystem.Windows);
             environmentHelper.SetupGet(x => x.Architecture).Returns(PlatformArchitecture.X64);
             processHelper.Setup(x => x.GetCurrentProcessFileName()).Returns(finalMuxerPath);
+            processHelper.Setup(x => x.GetCurrentProcessArchitecture()).Returns(PlatformArchitecture.X64);
 
             // Act & Assert
             Assert.IsTrue(dotnetHostHelper.TryGetDotnetPathByArchitecture(PlatformArchitecture.X64, out string muxerPath));

test/Microsoft.TestPlatform.TestHostProvider.UnitTests/Hosting/DotnetTestHostManagerTests.cs

@@ -97,6 +97,7 @@ public DotnetTestHostManagerTests()
             // Setup a dummy current process for tests
             this.mockProcessHelper.Setup(ph => ph.GetCurrentProcessFileName()).Returns(DefaultDotnetPath);
             this.mockProcessHelper.Setup(ph => ph.GetTestEngineDirectory()).Returns(DefaultDotnetPath);
+            this.mockProcessHelper.Setup(ph => ph.GetCurrentProcessArchitecture()).Returns(PlatformArchitecture.X64);
             this.mockEnvironmentVariable.Setup(ev => ev.GetEnvironmentVariable(It.IsAny<string>())).Returns(Path.GetDirectoryName(DefaultDotnetPath));
             this.mockFileHelper.Setup(ph => ph.Exists(this.defaultTestHostPath)).Returns(true);
             this.mockFileHelper.Setup(ph => ph.Exists(DefaultDotnetPath)).Returns(true);