[task] Bootstrap export-symbols-outfile mono aot compiler option to M…

…onoAOTCompiler Task
dotnet · Dec 9, 2022 · 4142a37 · 4142a37
1 parent 2e322e7
commit 4142a37
Showing 1 changed file with 19 additions and 0 deletions.
diff --git a/src/tasks/AotCompilerTask/MonoAOTCompiler.cs b/src/tasks/AotCompilerTask/MonoAOTCompiler.cs
@@ -163,6 +163,11 @@ public class MonoAOTCompiler : Microsoft.Build.Utilities.Task
     /// </summary>
     public string LibraryFilePrefix { get; set; } = "";
 
+    /// <summary>
+    /// Enables exporting symbols of methods decorated with UnmanagedCallersOnly Attribute containing a specified EntryPoint
+    /// </summary>
+    public bool EnableUnmanagedCallersOnlyMethodsExport { get; set; }
+
     /// <summary>
     /// Path to the directory where LLVM binaries (opt and llc) are found.
     /// It's required if UseLLVM is set
@@ -729,6 +734,20 @@ private PrecompileArguments GetPrecompileArgumentsFor(ITaskItem assemblyItem, st
             }
         }
 
+        if ((parsedAotMode == MonoAotMode.Full ||
+            parsedAotMode == MonoAotMode.FullInterp ||
+            parsedAotMode == MonoAotMode.LLVMOnly ||
+            parsedAotMode == MonoAotMode.LLVMOnlyInterp) &&
+            EnableUnmanagedCallersOnlyMethodsExport)
+        {
+            string exportSymbolsFile = Path.Combine(OutputDir, Path.ChangeExtension(assemblyFilename, ".exportsymbols"));
+            ProxyFile proxyFile = _cache.NewFile(exportSymbolsFile);
+            proxyFiles.Add(proxyFile);
+
+            aotArgs.Add($"export-symbols-outfile={proxyFile.TempFile}");
+            aotAssembly.SetMetadata("ExportSymbolsFile", proxyFile.TargetFile);
+        }
+
         // pass msym-dir if specified
         if (MsymPath != null)
         {