[NativeAOT-LLVM] Enable linux build of Wasm

eng/native/gen-buildsys.sh

@@ -94,7 +94,14 @@ if [[ "$scan_build" == "ON" && -n "$SCAN_BUILD_COMMAND" ]]; then
 fi
 
 if [[ "$host_arch" == "wasm" ]]; then
+     echo "host arch wasm"
     if [[ "$target_os" == "browser" ]]; then
+	    echo target os browser
+        if [[ -n "$NATIVEAOT_CI_WASM_BUILD_EMSDK_PATH" ]]; then
+             source $NATIVEAOT_CI_WASM_BUILD_EMSDK_PATH/emsdk_env.sh
+        fi
+	echo emsdk path
+	echo $NATIVEAOT_CI_WASM_BUILD_EMSDK_PATH
         cmake_command="emcmake $cmake_command"
     elif [[ "$target_os" == "wasi" ]]; then
         true

eng/pipelines/common/platform-matrix.yml

@@ -564,6 +564,25 @@ jobs:
         buildConfig: ${{ parameters.buildConfig }}
         ${{ insert }}: ${{ parameters.jobParameters }}
 
+# Browser WebAssembly on Linux
+
+- ${{ if containsValue(parameters.platforms, 'browser_wasm_linux') }}:
+  - template: xplat-setup.yml
+    parameters:
+      jobTemplate: ${{ parameters.jobTemplate }}
+      helixQueuesTemplate: ${{ parameters.helixQueuesTemplate }}
+      variables: ${{ parameters.variables }}
+      osGroup: browser
+      archType: wasm
+      targetRid: browser-wasm
+      platform: browser_wasm_linux
+      shouldContinueOnError: ${{ parameters.shouldContinueOnError }}
+      jobParameters:
+        hostedOs: linux
+        runtimeFlavor: ${{ parameters.runtimeFlavor }}
+        buildConfig: ${{ parameters.buildConfig }}
+        ${{ insert }}: ${{ parameters.jobParameters }}
+
 # FreeBSD
 - ${{ if containsValue(parameters.platforms, 'freebsd_x64') }}:
   - template: xplat-setup.yml

eng/pipelines/runtimelab/install-emscripten.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+mkdir "$1" 2>/dev/null
+cd "$1"
+
+git clone https://github.com/emscripten-core/emsdk.git
+
+cd emsdk
+# Checkout a known good version to avoid a random break when emscripten changes the top of tree.
+git checkout 37b85e9
+
+#powershell -NoProfile -NoLogo -ExecutionPolicy ByPass -command "& """%~dp0update-machine-certs.ps1""" %*"
+
+python emsdk.py install 3.1.47 || exit 1
+./emsdk activate 3.1.47 || exit 1
+
+# We key off of this variable in the common/build.ps1 script.
+echo Setting NATIVEAOT_CI_WASM_BUILD_EMSDK_PATH to $PWD
+echo "##vso[task.setvariable variable=NATIVEAOT_CI_WASM_BUILD_EMSDK_PATH]$PWD"

eng/pipelines/runtimelab/runtimelab-post-build-steps.yml

@@ -21,7 +21,7 @@ steps:
     - script: $(Build.SourcesDirectory)/build$(scriptExt) clr.wasmjit+clr.aot -c $(buildConfigUpper) $(_officialBuildParameter) -ci
       displayName: Build the ILC and RyuJit cross-compilers
 
-    - ${{ if and(eq(parameters.isOfficialBuild, true), eq(parameters.platform, 'browser_wasm_win')) }}:
+    - ${{ if and(eq(parameters.isOfficialBuild, true), or(eq(parameters.platform, 'browser_wasm_win'), eq(parameters.platform, 'browser_wasm_linux'))) }}:
       - script: $(Build.SourcesDirectory)/build$(scriptExt) libs+nativeaot.packages -c $(buildConfigUpper) $(_officialBuildParameter) -ci
         displayName: Build host packages
 

src/coreclr/build-runtime.sh

@@ -191,6 +191,7 @@ if [[ "$__CMakeTarget" == *"wasmjit"* ]]; then
   fi
 fi
 
+
 if [[ -z "$__CMakeTarget" ]]; then
     __CMakeTarget="install"
 fi
@@ -205,7 +206,7 @@ fi
 
 eval "$__RepoRootDir/eng/native/version/copy_version_files.sh"
 
-build_native "$__HostOS" "$__HostArch" "$__ProjectRoot" "$__IntermediatesDir" "$__CMakeTarget" "$__CMakeArgs" "CoreCLR component"
+build_native "$__HostOS" "$__HostArch" "$__ProjectRoot" "$__IntermediatesDir" "$__CMakeTarget" "$__CMakeArgs $__ExtraCmakeArgs" "CoreCLR component"
 
 # Build complete
 

src/coreclr/jit/CMakeLists.txt

@@ -712,6 +712,10 @@ endif (CLR_CMAKE_TARGET_ARCH_RISCV64)
 if (CLR_CMAKE_BUILD_LLVM_JIT)
     # The LLVM clrjit needs to be the last clrjit to use create_standalone_jit as it modifies some cmake variables.
     # LLVM clrjit has an extra export - registerLlvmCallbacks.
+    if (CLR_CMAKE_TARGET_LINUX)
+      add_compile_options(-Wno-switch)
+      add_compile_options(-Wno-format)
+    endif (CLR_CMAKE_TARGET_LINUX)
     set(CLRJIT_EXPORTS ${CMAKE_CURRENT_LIST_DIR}/ClrJit.Llvm.exports)
     set(JIT_EXPORTS_FILE ${CMAKE_CURRENT_BINARY_DIR}/ClrJit.Llvm.exports.def)
     preprocess_file (${CLRJIT_EXPORTS} ${JIT_EXPORTS_FILE})

src/coreclr/jit/llvm.cpp

@@ -770,7 +770,7 @@ CORINFO_GENERIC_HANDLE Llvm::getSymbolHandleForClassToken(mdToken token)
 template <EEApiId Func, typename TReturn, typename... TArgs>
 TReturn CallEEApi(TArgs... args)
 {
-    return static_cast<TReturn (*)(TArgs...)>(g_callbacks[static_cast<int>(Func)])(args...);
+    return reinterpret_cast<TReturn (*)(TArgs...)>(g_callbacks[static_cast<int>(Func)])(args...);
 }
 
 const char* Llvm::GetMangledMethodName(CORINFO_METHOD_HANDLE methodHandle)
@@ -866,8 +866,8 @@ extern "C" DLLEXPORT void registerLlvmCallbacks(void** jitImports, void** jitExp
     assert(jitExports != nullptr);
 
     memcpy(g_callbacks, jitImports, static_cast<int>(EEApiId::Count) * sizeof(void*));
-    jitExports[static_cast<int>(JitApiId::StartSingleThreadedCompilation)] = &Llvm::StartSingleThreadedCompilation;
-    jitExports[static_cast<int>(JitApiId::FinishSingleThreadedCompilation)] = &Llvm::FinishSingleThreadedCompilation;
+    jitExports[static_cast<int>(JitApiId::StartSingleThreadedCompilation)] = (void*)&Llvm::StartSingleThreadedCompilation;
+    jitExports[static_cast<int>(JitApiId::FinishSingleThreadedCompilation)] = (void*)&Llvm::FinishSingleThreadedCompilation;
     jitExports[static_cast<int>(JitApiId::Count)] = (void*)0x1234;
 }
 

src/coreclr/jit/llvmcodegen.cpp

@@ -1118,6 +1118,7 @@ void Llvm::visitNode(GenTree* node)
             break;
         case GT_JMP:
             NYI("LLVM/GT_JMP"); // Requires support for explicit tailcalls.
+        LLVM_FALLTHROUGH;
         default:
             unreached();
     }

src/coreclr/jit/llvmlssa.cpp

@@ -1482,7 +1482,7 @@ class ShadowStackAllocator
         {
             if (block != m_currentBlock)
             {
-                m_actions.Push({AllocationActionKind::Block, m_currentBlockIndex++});
+                m_actions.Push({AllocationActionKind::Block, {m_currentBlockIndex++}});
                 m_currentBlock = block;
             }
         }