[wasm] Addressing System.Runtime.Extensions failures

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -1790,7 +1790,7 @@
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Stopwatch.Unix.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Diagnostics\Tracing\RuntimeEventSourceHelper.Unix.cs" Condition="'$(FeaturePerfTracing)' == 'true'" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Environment.NoRegistry.cs" />
- <Compile Include="$(MSBuildThisFileDirectory)System\Environment.Unix.cs" />
+ <Compile Include="$(MSBuildThisFileDirectory)System\Environment.UnixOrBrowser.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Environment.OSVersion.OSX.cs" Condition="'$(IsOSXLike)' == 'true'" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Environment.OSVersion.Unix.cs" Condition="'$(IsOSXLike)' != 'true'" />
  <Compile Include="$(MSBuildThisFileDirectory)System\Environment.GetFolderPathCore.Unix.cs" Condition="'$(TargetsiOS)' != 'true' and '$(TargetstvOS)' != 'true'" />
@@ -1818,6 +1818,12 @@
  <Compile Include="$(MSBuildThisFileDirectory)System\Threading\TimerQueue.Unix.cs" />
  <Compile Include="$(MSBuildThisFileDirectory)System\TimeZoneInfo.Unix.cs" />
  </ItemGroup>
+ <ItemGroup Condition="'$(TargetsUnix)' == 'true'">
+ <Compile Include="$(MSBuildThisFileDirectory)System\Environment.Unix.cs" />
+ </ItemGroup>
+ <ItemGroup Condition="'$(TargetsBrowser)' == 'true'">
+ <Compile Include="$(MSBuildThisFileDirectory)System\Environment.Browser.cs" />
+ </ItemGroup>
  <ItemGroup Condition="'$(IsOSXLike)' == 'true'">
  <Compile Include="$(CommonPath)Interop\OSX\Interop.libobjc.cs">
  <Link>Common\Interop\OSX\Interop.libobjc.cs</Link>

src/libraries/System.Private.CoreLib/src/System/Environment.Browser.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace System
+{
+ public static partial class Environment
+ {
+ // Emscripten VFS mounts at / and is the only drive
+ public static string[] GetLogicalDrives() => new string[] { "/" };
+
+ // In the mono runtime, this maps to gethostname, which returns 'emscripten'.
+ // Returning the value here allows us to exclude more of the runtime.
+ public static string MachineName => "emscripten";
+
+ // Matching what we returned for an earlier release. There isn't an established equivalent
+ // on wasm.
+ public static long WorkingSet => 0;
+
+ // Matching what we returned for an earlier release
+ public static string UserName => "web_user";
+ }
+}

src/libraries/System.Private.CoreLib/src/System/Environment.Unix.cs

@@ -12,44 +12,8 @@ namespace System
 {
  public static partial class Environment
  {
- public static bool UserInteractive => true;
-
- private static string CurrentDirectoryCore
- {
- get => Interop.Sys.GetCwd();
- set => Interop.CheckIo(Interop.Sys.ChDir(value), value, isDirectory: true);
- }
-
- private static string ExpandEnvironmentVariablesCore(string name)
- {
- var result = new ValueStringBuilder(stackalloc char[128]);
-
- int lastPos = 0, pos;
- while (lastPos < name.Length && (pos = name.IndexOf('%', lastPos + 1)) >= 0)
- {
- if (name[lastPos] == '%')
- {
- string key = name.Substring(lastPos + 1, pos - lastPos - 1);
- string? value = GetEnvironmentVariable(key);
- if (value != null)
- {
- result.Append(value);
- lastPos = pos + 1;
- continue;
- }
- }
- result.Append(name.AsSpan(lastPos, pos - lastPos));
- lastPos = pos;
- }
- result.Append(name.AsSpan(lastPos));
-
- return result.ToString();
- }
-
  public static string[] GetLogicalDrives() => Interop.Sys.GetAllMountPoints();
 
- private static bool Is64BitOperatingSystemWhen32BitProcess => false;
-
  public static string MachineName
  {
  get
@@ -60,13 +24,24 @@ public static string MachineName
  }
  }
 
- private static int GetCurrentProcessId() => Interop.Sys.GetPid();
-
- internal const string NewLineConst = "\n";
-
- public static string SystemDirectory => GetFolderPathCore(SpecialFolder.System, SpecialFolderOption.None);
+ public static long WorkingSet
+ {
+ get
+ {
+ Type? processType = Type.GetType("System.Diagnostics.Process, System.Diagnostics.Process, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", throwOnError: false);
+ if (processType?.GetMethod("GetCurrentProcess")?.Invoke(null, BindingFlags.DoNotWrapExceptions, null, null, null) is IDisposable currentProcess)
+ {
+ using (currentProcess)
+ {
+ if (processType!.GetMethod("get_WorkingSet64")?.Invoke(currentProcess, BindingFlags.DoNotWrapExceptions, null, null, null) is long result)
+ return result;
+ }
+ }
 
- public static int SystemPageSize => CheckedSysConf(Interop.Sys.SysConfName._SC_PAGESIZE);
+ // Could not get the current working set.
+ return 0;
+ }
+ }
 
  public static unsafe string UserName
  {
@@ -99,76 +74,5 @@ public static unsafe string UserName
 
  }
  }
-
- private static unsafe bool TryGetUserNameFromPasswd(byte* buf, int bufLen, out string? username)
- {
- // Call getpwuid_r to get the passwd struct
- Interop.Sys.Passwd passwd;
- int error = Interop.Sys.GetPwUidR(Interop.Sys.GetEUid(), out passwd, buf, bufLen);
-
- // If the call succeeds, give back the user name retrieved
- if (error == 0)
- {
- Debug.Assert(passwd.Name != null);
- username = Marshal.PtrToStringAnsi((IntPtr)passwd.Name);
- return true;
- }
-
- // If the current user's entry could not be found, give back null,
- // but still return true (false indicates the buffer was too small).
- if (error == -1)
- {
- username = null;
- return true;
- }
-
- var errorInfo = new Interop.ErrorInfo(error);
-
- // If the call failed because the buffer was too small, return false to
- // indicate the caller should try again with a larger buffer.
- if (errorInfo.Error == Interop.Error.ERANGE)
- {
- username = null;
- return false;
- }
-
- // Otherwise, fail.
- throw new IOException(errorInfo.GetErrorMessage(), errorInfo.RawErrno);
- }
-
- public static string UserDomainName => MachineName;
-
- /// <summary>Invoke <see cref="Interop.Sys.SysConf"/>, throwing if it fails.</summary>
- private static int CheckedSysConf(Interop.Sys.SysConfName name)
- {
- long result = Interop.Sys.SysConf(name);
- if (result == -1)
- {
- Interop.ErrorInfo errno = Interop.Sys.GetLastErrorInfo();
- throw errno.Error == Interop.Error.EINVAL ?
- new ArgumentOutOfRangeException(nameof(name), name, errno.GetErrorMessage()) :
- Interop.GetIOException(errno);
- }
- return (int)result;
- }
-
- public static long WorkingSet
- {
- get
- {
- Type? processType = Type.GetType("System.Diagnostics.Process, System.Diagnostics.Process, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", throwOnError: false);
- if (processType?.GetMethod("GetCurrentProcess")?.Invoke(null, BindingFlags.DoNotWrapExceptions, null, null, null) is IDisposable currentProcess)
- {
- using (currentProcess)
- {
- if (processType!.GetMethod("get_WorkingSet64")?.Invoke(currentProcess, BindingFlags.DoNotWrapExceptions, null, null, null) is long result)
- return result;
- }
- }
-
- // Could not get the current working set.
- return 0;
- }
- }
  }
 }

src/libraries/System.Private.CoreLib/src/System/Environment.UnixOrBrowser.cs

@@ -0,0 +1,111 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading;
+
+namespace System
+{
+ public static partial class Environment
+ {
+ public static bool UserInteractive => true;
+
+ private static string CurrentDirectoryCore
+ {
+ get => Interop.Sys.GetCwd();
+ set => Interop.CheckIo(Interop.Sys.ChDir(value), value, isDirectory: true);
+ }
+
+ private static string ExpandEnvironmentVariablesCore(string name)
+ {
+ var result = new ValueStringBuilder(stackalloc char[128]);
+
+ int lastPos = 0, pos;
+ while (lastPos < name.Length && (pos = name.IndexOf('%', lastPos + 1)) >= 0)
+ {
+ if (name[lastPos] == '%')
+ {
+ string key = name.Substring(lastPos + 1, pos - lastPos - 1);
+ string? value = GetEnvironmentVariable(key);
+ if (value != null)
+ {
+ result.Append(value);
+ lastPos = pos + 1;
+ continue;
+ }
+ }
+ result.Append(name.AsSpan(lastPos, pos - lastPos));
+ lastPos = pos;
+ }
+ result.Append(name.AsSpan(lastPos));
+
+ return result.ToString();
+ }
+
+ private static bool Is64BitOperatingSystemWhen32BitProcess => false;
+
+ private static int GetCurrentProcessId() => Interop.Sys.GetPid();
+
+ internal const string NewLineConst = "\n";
+
+ public static string SystemDirectory => GetFolderPathCore(SpecialFolder.System, SpecialFolderOption.None);
+
+ public static int SystemPageSize => CheckedSysConf(Interop.Sys.SysConfName._SC_PAGESIZE);
+
+ private static unsafe bool TryGetUserNameFromPasswd(byte* buf, int bufLen, out string? username)
+ {
+ // Call getpwuid_r to get the passwd struct
+ Interop.Sys.Passwd passwd;
+ int error = Interop.Sys.GetPwUidR(Interop.Sys.GetEUid(), out passwd, buf, bufLen);
+
+ // If the call succeeds, give back the user name retrieved
+ if (error == 0)
+ {
+ Debug.Assert(passwd.Name != null);
+ username = Marshal.PtrToStringAnsi((IntPtr)passwd.Name);
+ return true;
+ }
+
+ // If the current user's entry could not be found, give back null,
+ // but still return true (false indicates the buffer was too small).
+ if (error == -1)
+ {
+ username = null;
+ return true;
+ }
+
+ var errorInfo = new Interop.ErrorInfo(error);
+
+ // If the call failed because the buffer was too small, return false to
+ // indicate the caller should try again with a larger buffer.
+ if (errorInfo.Error == Interop.Error.ERANGE)
+ {
+ username = null;
+ return false;
+ }
+
+ // Otherwise, fail.
+ throw new IOException(errorInfo.GetErrorMessage(), errorInfo.RawErrno);
+ }
+
+ public static string UserDomainName => MachineName;
+
+ /// <summary>Invoke <see cref="Interop.Sys.SysConf"/>, throwing if it fails.</summary>
+ private static int CheckedSysConf(Interop.Sys.SysConfName name)
+ {
+ long result = Interop.Sys.SysConf(name);
+ if (result == -1)
+ {
+ Interop.ErrorInfo errno = Interop.Sys.GetLastErrorInfo();
+ throw errno.Error == Interop.Error.EINVAL ?
+ new ArgumentOutOfRangeException(nameof(name), name, errno.GetErrorMessage()) :
+ Interop.GetIOException(errno);
+ }
+ return (int)result;
+ }
+ }
+}

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

@@ -44,6 +44,7 @@ public void RelativeSearchPath_Is_Null()
  }
 
  [Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // throws pNSE
  public void TargetFrameworkTest()
  {
  const int ExpectedExitCode = 0;
@@ -129,7 +130,7 @@ public void FriendlyName()
 
  // GetEntryAssembly may be null (i.e. desktop)
  if (expected == null)
- expected = Assembly.GetExecutingAssembly().GetName().Name;
+ expected = "DefaultDomain";
 
  Assert.Equal(expected, s);
  }
@@ -371,6 +372,7 @@ public void ReflectionOnlyGetAssemblies()
  }
 
  [Fact]
+ [PlatformSpecific(~TestPlatforms.Browser)] // Throws PNSE
  public void MonitoringIsEnabled()
  {
  Assert.True(AppDomain.MonitoringIsEnabled);

src/libraries/System.Runtime.Extensions/tests/System/Environment.Exit.cs

@@ -41,6 +41,7 @@ public static void ExitCode_Roundtrips(int exitCode)
  [InlineData(1)] // setting ExitCode and exiting Main
  [InlineData(2)] // setting ExitCode both from Main and from an Unloading event handler.
  [InlineData(3)] // using Exit(exitCode)
+ [PlatformSpecific(~TestPlatforms.Browser)] // throws PNSE
  public static void ExitCode_VoidMainAppReturnsSetValue(int mode)
  {
  int expectedExitCode = 123;

src/libraries/System.Runtime.Extensions/tests/System/Environment.MachineName.cs

@@ -20,6 +20,8 @@ internal static string GetComputerName()
 #if !Unix
  return Environment.GetEnvironmentVariable("COMPUTERNAME");
 #else
+ if (PlatformDetection.IsBrowser)
+ return "emscripten";
  string temp = Interop.Sys.GetNodeName();
  int index = temp.IndexOf('.');
  return index < 0 ? temp : temp.Substring(0, index);

src/libraries/System.Runtime.Extensions/tests/System/Environment.StackTrace.cs

@@ -68,6 +68,7 @@ public TestClass()
  }
 
  [Fact]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/38995", TestPlatforms.Browser)]
  public void StackTraceDoesNotStartWithInternalFrame()
  {
  string stackTrace = Environment.StackTrace;

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

@@ -220,7 +220,10 @@ public void Version_Valid()
  [Fact]
  public void WorkingSet_Valid()
  {
- Assert.True(Environment.WorkingSet > 0, "Expected positive WorkingSet value");
+ if (PlatformDetection.IsBrowser)
+ Assert.Equal(0, Environment.WorkingSet);
+ else
+ Assert.True(Environment.WorkingSet > 0, "Expected positive WorkingSet value");
  }
 
  [Trait(XunitConstants.Category, XunitConstants.IgnoreForCI)] // fail fast crashes the process

src/libraries/System.Runtime.Extensions/tests/System/IO/PathTests.cs

@@ -216,8 +216,6 @@ public static TheoryData<string, string> GetFullPath_BasicExpansions
  { currentDirectory, currentDirectory },
  // "." => current directory
  { ".", currentDirectory },
- // ".." => up a directory
- { "..", Path.GetDirectoryName(currentDirectory) },
  // "dir/./././." => "dir"
  { Path.Combine(currentDirectory, ".", ".", ".", ".", "."), currentDirectory },
  // "dir///." => "dir"
@@ -234,6 +232,12 @@ public static TheoryData<string, string> GetFullPath_BasicExpansions
  { root + new string(Path.DirectorySeparatorChar, 3), root },
  };
 
+ if (currentDirectory != Path.GetPathRoot(currentDirectory))
+ {
+ // ".." => up a directory
+ data.Add("..", Path.GetDirectoryName(currentDirectory));
+ }
+
  // Path longer than MaxPath that normalizes down to less than MaxPath
  const int Iters = 10000;
  var longPath = new StringBuilder(currentDirectory, currentDirectory.Length + (Iters * 2));