[wasi][draft] build WASI

Directory.Build.props

@@ -36,6 +36,7 @@
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(_hostArch)' == 's390x'">s390x</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(_hostArch)' == 'ppc64le'">ppc64le</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and ('$(TargetOS)' == 'Browser' or '$(RuntimeIdentifier)' == 'browser-wasm')">wasm</TargetArchitecture>
+    <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and ('$(TargetOS)' == 'wasi' or '$(RuntimeIdentifier)' == 'wasi-wasm')">wasm</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == '' and '$(TargetsMobile)' == 'true'">x64</TargetArchitecture>
     <TargetArchitecture Condition="'$(TargetArchitecture)' == ''">x64</TargetArchitecture>
     <Platform Condition="'$(Platform)' == '' and '$(InferPlatformFromTargetArchitecture)' == 'true'">$(TargetArchitecture)</Platform>
@@ -118,6 +119,8 @@
     <TestExclusionListTasksAssemblyPath>$([MSBuild]::NormalizePath('$(TestExclusionListTasksDir)', 'TestExclusionListTasks.dll'))</TestExclusionListTasksAssemblyPath>
     <CoreCLRToolPath>$([MSBuild]::NormalizeDirectory('$(ArtifactsBinDir)', 'coreclr', '$(TargetOS).$(TargetArchitecture).$(Configuration)'))</CoreCLRToolPath>
     <ILAsmToolPath Condition="'$(DotNetBuildFromSource)' == 'true' or '$(BuildArchitecture)' == 's390x' or '$(BuildArchitecture)' == 'ppc64le'">$(CoreCLRToolPath)</ILAsmToolPath>
+
+    <WasmtimeDir>$([MSBuild]::NormalizeDirectory($(ArtifactsBinDir), 'wasmtime'))</WasmtimeDir>
   </PropertyGroup>
 
   <PropertyGroup Label="CalculateConfiguration">

eng/build.ps1

@@ -241,6 +241,10 @@ if ($PSBoundParameters.ContainsKey('os') -and $PSBoundParameters['os'] -eq "Brow
   # make sure it is capitalized
   $PSBoundParameters['os'] = "Browser"
 }
+if ($PSBoundParameters.ContainsKey('os') -and $PSBoundParameters['os'] -eq "wasi") {
+  # make sure it is not capitalized
+  $PSBoundParameters['os'] = "wasi"
+}
 
 foreach ($argument in $PSBoundParameters.Keys)
 {

eng/native/configurecompiler.cmake

@@ -169,7 +169,7 @@ elseif (CLR_CMAKE_HOST_UNIX)
     endif ()
   endif(UPPERCASE_CMAKE_BUILD_TYPE STREQUAL DEBUG OR UPPERCASE_CMAKE_BUILD_TYPE STREQUAL CHECKED)
 
-  if(CLR_CMAKE_HOST_BROWSER)
+  if(CLR_CMAKE_HOST_BROWSER OR CLR_CMAKE_HOST_WASI)
     # The emscripten build has additional warnings so -Werror breaks
     add_compile_options(-Wno-unused-parameter)
     add_compile_options(-Wno-alloca)
@@ -391,7 +391,7 @@ if (CLR_CMAKE_HOST_UNIX)
       add_definitions(-DLSE_INSTRUCTIONS_ENABLED_BY_DEFAULT)
       add_compile_options(-mcpu=apple-m1)
     endif(CLR_CMAKE_HOST_UNIX_ARM64)
-  elseif(NOT CLR_CMAKE_HOST_BROWSER)
+  elseif(NOT CLR_CMAKE_HOST_BROWSER AND NOT CLR_CMAKE_HOST_WASI)
     check_c_compiler_flag(-fstack-protector-strong COMPILER_SUPPORTS_F_STACK_PROTECTOR_STRONG)
     if (COMPILER_SUPPORTS_F_STACK_PROTECTOR_STRONG)
       add_compile_options(-fstack-protector-strong)
@@ -793,7 +793,7 @@ if (CLR_CMAKE_HOST_WIN32)
         message(FATAL_ERROR "MC not found")
     endif()
 
-elseif (NOT CLR_CMAKE_HOST_BROWSER)
+elseif (NOT CLR_CMAKE_HOST_BROWSER AND NOT CLR_CMAKE_HOST_WASI)
     # This is a workaround for upstream issue: https://gitlab.kitware.com/cmake/cmake/-/issues/22995.
     #
     # In Clang.cmake, the decision to use single or double hyphen for target and gcc-toolchain

eng/native/configureplatform.cmake

@@ -214,9 +214,9 @@ if(CLR_CMAKE_HOST_OS STREQUAL Emscripten)
     set(CLR_CMAKE_HOST_BROWSER 1)
 endif(CLR_CMAKE_HOST_OS STREQUAL Emscripten)
 
-if(CLR_CMAKE_TARGET_OS STREQUAL Wasi)
+if(CLR_CMAKE_TARGET_OS STREQUAL WASI)
     set(CLR_CMAKE_HOST_WASI 1)
-endif(CLR_CMAKE_TARGET_OS STREQUAL Wasi)
+endif(CLR_CMAKE_TARGET_OS STREQUAL WASI)
 
 #--------------------------------------------
 # This repo builds two set of binaries
@@ -417,9 +417,9 @@ if(CLR_CMAKE_TARGET_OS STREQUAL Emscripten)
     set(CLR_CMAKE_TARGET_BROWSER 1)
 endif(CLR_CMAKE_TARGET_OS STREQUAL Emscripten)
 
-if(CLR_CMAKE_TARGET_OS STREQUAL Wasi)
+if(CLR_CMAKE_TARGET_OS STREQUAL WASI)
     set(CLR_CMAKE_TARGET_WASI 1)
-endif(CLR_CMAKE_TARGET_OS STREQUAL Wasi)
+endif(CLR_CMAKE_TARGET_OS STREQUAL WASI)
 
 if(CLR_CMAKE_TARGET_UNIX)
     if(CLR_CMAKE_TARGET_ARCH STREQUAL x64)
@@ -454,7 +454,7 @@ else()
 endif(CLR_CMAKE_TARGET_UNIX)
 
 # check if host & target os/arch combination are valid
-if (NOT (CLR_CMAKE_TARGET_OS STREQUAL CLR_CMAKE_HOST_OS))
+if (NOT (CLR_CMAKE_TARGET_OS STREQUAL CLR_CMAKE_HOST_OS) AND NOT CLR_CMAKE_TARGET_WASI)
     if(NOT (CLR_CMAKE_HOST_OS STREQUAL windows))
         message(FATAL_ERROR "Invalid host and target os/arch combination. Host OS: ${CLR_CMAKE_HOST_OS}")
     endif()
@@ -466,7 +466,7 @@ if (NOT (CLR_CMAKE_TARGET_OS STREQUAL CLR_CMAKE_HOST_OS))
     endif()
 endif()
 
-if(NOT CLR_CMAKE_TARGET_BROWSER)
+if(NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI)
     # The default linker on Solaris also does not support PIE.
     if(NOT CLR_CMAKE_TARGET_ANDROID AND NOT CLR_CMAKE_TARGET_SUNOS AND NOT CLR_CMAKE_TARGET_OSX AND NOT CLR_CMAKE_TARGET_MACCATALYST AND NOT CLR_CMAKE_HOST_TVOS AND NOT CLR_CMAKE_HOST_IOS AND NOT MSVC)
         set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pie")

eng/native/configuretools.cmake

@@ -6,7 +6,7 @@ if (CMAKE_C_COMPILER MATCHES "-?[0-9]+(\.[0-9]+)?$")
   set(CLR_CMAKE_COMPILER_FILE_NAME_VERSION "${CMAKE_MATCH_0}")
 endif()
 
-if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER)
+if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER AND NOT CLR_CMAKE_TARGET_WASI)
   if(CMAKE_C_COMPILER_ID MATCHES "Clang")
     if(APPLE)
       set(TOOLSET_PREFIX "")

eng/native/gen-buildsys.cmd

@@ -48,21 +48,30 @@ if /i "%__Arch%" == "wasm" (
     )
     if /i "%__Os%" == "Browser" (
         if "%EMSDK_PATH%" == "" (
-            if not exist "%__repoRoot%src\mono\wasm\emsdk" (
+            if not exist "%__repoRoot%\src\mono\wasm\emsdk" (
                 echo Error: Should set EMSDK_PATH environment variable pointing to emsdk root.
                 exit /B 1
             )
 
-            set EMSDK_PATH=%__repoRoot%src\mono\wasm\emsdk
+            set EMSDK_PATH=%__repoRoot%\src\mono\wasm\emsdk
             set EMSDK_PATH=!EMSDK_PATH:\=/!
         )
 
         set __ExtraCmakeParams=%__ExtraCmakeParams% "-DCMAKE_TOOLCHAIN_FILE=!EMSDK_PATH!/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake"
         set __UseEmcmake=1
     )
     if /i "%__Os%" == "wasi" (
-        echo Error: WASI build not implemented on Windows yet
-        exit /B 1
+        if "%WASI_SDK_PATH%" == "" (
+            if not exist "%__repoRoot%\src\mono\wasi\wasi-sdk" (
+                echo Error: Should set WASI_SDK_PATH environment variable pointing to emsdk root.
+                exit /B 1
+            )
+
+            set WASI_SDK_PATH=%__repoRoot%src\mono\wasi\wasi-sdk
+            set WASI_SDK_PATH=!WASI_SDK_PATH:\=/!
+        )
+        set __CmakeGenerator=Ninja
+        set __ExtraCmakeParams=%__ExtraCmakeParams% -DCLR_CMAKE_TARGET_OS=WASI -DCLR_CMAKE_TARGET_ARCH=wasm "-DWASI_SDK_PREFIX=!WASI_SDK_PATH!" "-DCMAKE_TOOLCHAIN_FILE=!WASI_SDK_PATH!/share/cmake/wasi-sdk.cmake" "-DCMAKE_SYSROOT=!WASI_SDK_PATH!/share/wasi-sysroot"
     )
 ) else (
     set __ExtraCmakeParams=%__ExtraCmakeParams%  "-DCMAKE_SYSTEM_VERSION=10.0"

eng/pipelines/common/platform-matrix.yml

@@ -374,6 +374,27 @@ jobs:
         crossBuild: true
         ${{ insert }}: ${{ parameters.jobParameters }}
 
+# WASI WebAssembly
+
+- ${{ if containsValue(parameters.platforms, 'wasi_wasm') }}:
+  - template: xplat-setup.yml
+    parameters:
+      jobTemplate: ${{ parameters.jobTemplate }}
+      helixQueuesTemplate: ${{ parameters.helixQueuesTemplate }}
+      variables: ${{ parameters.variables }}
+      osGroup: wasi
+      archType: wasm
+      targetRid: wasi-wasm
+      platform: wasi_wasm
+      shouldContinueOnError: ${{ parameters.shouldContinueOnError }}
+      container: Browser_wasm
+      jobParameters:
+        hostedOs: Linux
+        runtimeFlavor: ${{ parameters.runtimeFlavor }}
+        stagedBuild: ${{ parameters.stagedBuild }}
+        buildConfig: ${{ parameters.buildConfig }}
+        ${{ insert }}: ${{ parameters.jobParameters }}
+
 # Browser WebAssembly
 
 - ${{ if containsValue(parameters.platforms, 'Browser_wasm') }}:

eng/pipelines/common/templates/wasi-build-only.yml

@@ -0,0 +1,49 @@
+parameters:
+  alwaysRun: false
+  extraBuildArgs: ''
+  isExtraPlatformsBuild: false
+  nameSuffix: ''
+  platforms: []
+
+jobs:
+
+#
+# Build for WASI/wasm and test it
+#
+- template: /eng/pipelines/common/platform-matrix.yml
+  parameters:
+    jobTemplate: /eng/pipelines/common/global-build-job.yml
+    helixQueuesTemplate: /eng/pipelines/libraries/helix-queues-setup.yml
+    buildConfig: Release
+    runtimeFlavor: mono
+    platforms: ${{ parameters.platforms }}
+    variables:
+      # map dependencies variables to local variables
+      - name: alwaysRunVar
+        value: ${{ parameters.alwaysRun }}
+      - name: shouldRunOnDefaultPipelines
+        value: $[
+          or(
+            eq(variables['wasmDarcDependenciesChanged'], true),
+            eq(dependencies.evaluate_paths.outputs['SetPathVars_libraries.containsChange'], true),
+            and(
+              eq(dependencies.evaluate_paths.outputs['SetPathVars_wasm.containsChange'], true),
+              eq(dependencies.evaluate_paths.outputs['SetPathVars_non_runtimetests.containsChange'], true)),
+            eq(dependencies.evaluate_paths.outputs['SetPathVars_wasm_libraries.containsChange'], true),
+            eq(dependencies.evaluate_paths.outputs['SetPathVars_mono_excluding_wasm.containsChange'], true))
+          ]
+    jobParameters:
+      isExtraPlatforms: ${{ parameters.isExtraPlatformsBuild }}
+      testGroup: innerloop
+      nameSuffix: ${{ parameters.nameSuffix }}_BuildOnly
+      buildArgs: -s mono+libs+host -c $(_BuildConfig) /p:ArchiveTests=true ${{ parameters.extraBuildArgs }}
+      timeoutInMinutes: 240
+      # if !alwaysRun, then:
+      #   if this is runtime-wasm (isWasmOnlyBuild):
+      #     - then run only if it would not have run on default pipelines (based
+      #       on path changes)
+      #     - else run based on path changes
+      condition: >-
+        or(
+          eq(variables['alwaysRunVar'], true),
+          eq(variables['isDefaultPipeline'], variables['shouldRunOnDefaultPipelines']))

eng/pipelines/common/templates/wasm-library-tests.yml

@@ -70,18 +70,3 @@ jobs:
         or(
           eq(variables['alwaysRunVar'], true),
           eq(variables['isDefaultPipeline'], variables['shouldRunOnDefaultPipelines']))
-      # extra steps, run tests
-      extraStepsTemplate: /eng/pipelines/common/templates/additional-steps-then-helix.yml
-      extraStepsParameters:
-        additionalSteps:
-          - ${{ if eq(parameters.buildAndRunWasi, true) }}:
-            - script: >-
-                make -C src/mono/wasi provision-deps all &&
-                make -C src/mono/wasi/sample/console run
-              name: build_wasi
-              displayName: Build WASI, and run a sample
-
-        creator: dotnet-bot
-        testRunNamePrefixSuffix: Mono_$(_BuildConfig)
-        extraHelixArguments: /p:BrowserHost=$(_hostedOs) $(_wasmRunSmokeTestsOnlyArg) ${{ parameters.extraHelixArgs }}
-        scenarios: ${{ parameters.scenarios }}

eng/targetingpacks.targets

@@ -41,7 +41,7 @@
                       RuntimeFrameworkName="$(LocalFrameworkOverrideName)"
                       LatestRuntimeFrameworkVersion="$(ProductVersion)"
                       RuntimePackNamePatterns="$(LocalFrameworkOverrideName).Runtime.Mono.**RID**"
-                      RuntimePackRuntimeIdentifiers="linux-arm;linux-armv6;linux-arm64;linux-musl-arm64;linux-bionic-arm64;linux-loongarch64;linux-musl-x64;linux-bionic-x64;linux-x64;osx-x64;rhel.6-x64;win-arm;win-arm64;win-x64;win-x86;linux-musl-arm;osx-arm64;maccatalyst-x64;maccatalyst-arm64;browser-wasm;ios-arm64;ios-arm;iossimulator-arm64;iossimulator-x64;iossimulator-x86;tvos-arm64;tvossimulator-arm64;tvossimulator-x64;android-arm64;android-arm;android-x64;android-x86"
+                      RuntimePackRuntimeIdentifiers="linux-arm;linux-armv6;linux-arm64;linux-musl-arm64;linux-bionic-arm64;linux-loongarch64;linux-musl-x64;linux-bionic-x64;linux-x64;osx-x64;rhel.6-x64;win-arm;win-arm64;win-x64;win-x86;linux-musl-arm;osx-arm64;maccatalyst-x64;maccatalyst-arm64;browser-wasm;wasi-wasm;ios-arm64;ios-arm;iossimulator-arm64;iossimulator-x64;iossimulator-x86;tvos-arm64;tvossimulator-arm64;tvossimulator-x64;android-arm64;android-arm;android-x64;android-x86"
                       RuntimePackLabels="Mono"
                       Condition="'@(KnownRuntimePack)' == '' or !@(KnownRuntimePack->AnyHaveMetadataValue('TargetFramework', '$(NetCoreAppCurrent)'))"/>
     <KnownAppHostPack Include="$(LocalFrameworkOverrideName)"

eng/testing/wasi-provisioning.targets

@@ -0,0 +1,3 @@
+<Project>
+  <Import Project="$(MSBuildThisFileDirectory)ProvisioningVersions.props" />
+</Project>

eng/versioning.targets

@@ -65,6 +65,9 @@
   <PropertyGroup Condition="'$(TargetPlatformIdentifier)' == '' and !$(TargetFrameworks.Contains('$(TargetFramework)-Browser'))">
     <CrossPlatformAndHasNoBrowserTarget>true</CrossPlatformAndHasNoBrowserTarget>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(TargetPlatformIdentifier)' == '' and !$(TargetFrameworks.Contains('$(TargetFramework)-wasi'))">
+    <CrossPlatformAndHasNoWasiTarget>true</CrossPlatformAndHasNoWasiTarget>
+  </PropertyGroup>
 
   <!-- Enables warnings for Android, iOS, tvOS and macCatalyst for all builds -->
   <ItemGroup>
@@ -78,6 +81,9 @@
   <ItemGroup Condition="('$(TargetPlatformIdentifier)' == 'Browser' or '$(CrossPlatformAndHasNoBrowserTarget)' == 'true') and '$(IsTestProject)' != 'true'">
     <SupportedPlatform Include="browser"/>
   </ItemGroup>
+  <ItemGroup Condition="('$(TargetPlatformIdentifier)' == 'wasi' or '$(CrossPlatformAndHasNoWasiTarget)' == 'true') and '$(IsTestProject)' != 'true'">
+    <SupportedPlatform Include="wasi"/>
+  </ItemGroup>
 
   <!-- Add target platforms into MSBuild SupportedPlatform list -->
   <ItemGroup Condition="'$(IsTestProject)' != 'true'">

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

@@ -147,7 +147,7 @@ public static bool IsEntered(object obj)
         [MethodImpl(MethodImplOptions.InternalCall)]
         private static extern bool ObjWait(int millisecondsTimeout, object obj);
 
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         public static bool Wait(object obj, int millisecondsTimeout)
         {
             if (obj == null)

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Threading/Monitor.NativeAot.cs

@@ -126,7 +126,7 @@ public static bool IsEntered(object obj)
 
         #region Public Wait/Pulse methods
 
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         public static bool Wait(object obj, int millisecondsTimeout)
         {
             Condition condition = GetCondition(obj);

src/coreclr/nativeaot/System.Private.CoreLib/src/System/Threading/ThreadPool.Windows.cs

@@ -14,7 +14,7 @@ namespace System.Threading
     // Windows-specific implementation of ThreadPool
     //
 #if !FEATURE_WASM_THREADS
-    [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser")]
+    [System.Runtime.Versioning.UnsupportedOSPlatformAttribute("browser"), System.Runtime.Versioning.UnsupportedOSPlatformAttribute("wasi")]
 #endif
     public sealed class RegisteredWaitHandle : MarshalByRefObject
     {

src/coreclr/pal/src/config.h.in

@@ -63,6 +63,9 @@
 #cmakedefine01 HAS_SYSV_SEMAPHORES
 #cmakedefine01 HAS_PTHREAD_MUTEXES
 #cmakedefine HAVE_TTRACE
+#cmakedefine01 HAVE_CHMOD
+#cmakedefine01 HAVE_FCHMOD
+#cmakedefine01 HAVE_PIPE
 #cmakedefine01 HAVE_PIPE2
 #cmakedefine01 HAVE_SCHED_GETAFFINITY
 #cmakedefine01 HAVE_SCHED_SETAFFINITY

src/coreclr/pal/src/configure.cmake

@@ -135,6 +135,9 @@ check_function_exists(semget HAS_SYSV_SEMAPHORES)
 check_function_exists(pthread_mutex_init HAS_PTHREAD_MUTEXES)
 check_function_exists(ttrace HAVE_TTRACE)
 check_function_exists(pipe2 HAVE_PIPE2)
+check_function_exists(pipe HAVE_PIPE)
+check_function_exists(chmod HAVE_CHMOD)
+check_function_exists(fchmod HAVE_FCHMOD)
 
 check_cxx_source_compiles("
 #include <pthread_np.h>

src/libraries/Common/src/System/Security/Cryptography/DSAOpenSsl.cs

@@ -25,7 +25,7 @@ public sealed partial class DSAOpenSsl : DSA, IRuntimeAlgorithm
         private Lazy<SafeDsaHandle>? _key;
 
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]
@@ -35,7 +35,7 @@ public DSAOpenSsl()
         }
 
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]

src/libraries/Common/src/System/Security/Cryptography/ECDiffieHellmanOpenSsl.cs

@@ -12,7 +12,7 @@ public sealed partial class ECDiffieHellmanOpenSsl : ECDiffieHellman
         private ECOpenSsl? _key;
 
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]
@@ -24,7 +24,7 @@ public ECDiffieHellmanOpenSsl(ECCurve curve)
         }
 
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]
@@ -34,7 +34,7 @@ public ECDiffieHellmanOpenSsl()
         }
 
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]

src/libraries/Common/src/System/Security/Cryptography/ECDsaOpenSsl.cs

@@ -23,7 +23,7 @@ public sealed partial class ECDsaOpenSsl : ECDsa, IRuntimeAlgorithm
         /// <param name="curve">The <see cref="ECCurve"/> representing the curve.</param>
         /// <exception cref="ArgumentNullException">if <paramref name="curve" /> is null.</exception>
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]
@@ -38,7 +38,7 @@ public ECDsaOpenSsl(ECCurve curve)
         ///     Create an ECDsaOpenSsl algorithm with a random 521 bit key pair.
         /// </summary>
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]
@@ -52,7 +52,7 @@ public ECDsaOpenSsl()
         /// </summary>
         /// <param name="keySize">Size of the key to generate, in bits.</param>
         [UnsupportedOSPlatform("android")]
-        [UnsupportedOSPlatform("browser")]
+        [UnsupportedOSPlatform("browser"), UnsupportedOSPlatform("wasi")]
         [UnsupportedOSPlatform("ios")]
         [UnsupportedOSPlatform("tvos")]
         [UnsupportedOSPlatform("windows")]