[wasi][mono] Fix conflicting naming for wasm import/export (#103881)

Add namespace for entrypoint

Author: mkhamoyan

src/mono/browser/runtime/runtime.c

@@ -370,13 +370,13 @@ mono_wasm_assembly_find_method (MonoClass *klass, const char *name, int argument
  * This wrapper ensures that the interpreter initializes the pointers.
  */
 void
-mono_wasm_marshal_get_managed_wrapper (const char* assemblyName, const char* typeName, const char* methodName, int num_params)
+mono_wasm_marshal_get_managed_wrapper (const char* assemblyName, const char* namespaceName, const char* typeName, const char* methodName, int num_params)
 {
 	MonoError error;
 	mono_error_init (&error);
 	MonoAssembly* assembly = mono_wasm_assembly_load (assemblyName);
 	assert (assembly);
-	MonoClass* class = mono_wasm_assembly_find_class (assembly, "", typeName);
+	MonoClass* class = mono_wasm_assembly_find_class (assembly, namespaceName, typeName);
 	assert (class);
 	MonoMethod* method = mono_wasm_assembly_find_method (class, methodName, num_params);
 	assert (method);

src/mono/browser/runtime/runtime.h

@@ -19,7 +19,7 @@ MonoDomain *mono_wasm_load_runtime_common (int debug_level, MonoLogCallback log_
 MonoAssembly *mono_wasm_assembly_load (const char *name);
 MonoClass *mono_wasm_assembly_find_class (MonoAssembly *assembly, const char *namespace, const char *name);
 MonoMethod *mono_wasm_assembly_find_method (MonoClass *klass, const char *name, int arguments);
-void mono_wasm_marshal_get_managed_wrapper (const char* assemblyName, const char* typeName, const char* methodName, int num_params);
+void mono_wasm_marshal_get_managed_wrapper (const char* assemblyName, const char* namespaceName, const char* typeName, const char* methodName, int num_params);
 int initialize_runtime ();
 
 #endif

src/tasks/WasmAppBuilder/PInvokeTableGenerator.cs

@@ -181,7 +181,8 @@ private string CEntryPoint(PInvoke pinvoke)
         if (pinvoke.WasmLinkage)
         {
             // We mangle the name to avoid collisions with symbols in other modules
-            return _fixupSymbolName($"{pinvoke.Module}#{pinvoke.EntryPoint}");
+            string namespaceName = pinvoke.Method.DeclaringType?.Namespace ?? string.Empty;
+            return _fixupSymbolName($"{namespaceName}#{pinvoke.Module}#{pinvoke.EntryPoint}");
         }
         return _fixupSymbolName(pinvoke.EntryPoint);
     }
@@ -295,8 +296,13 @@ private string CEntryPoint(PInvokeCallback export)
         }
 
         var method = export.Method;
-        // EntryPoint wasn't specified generate a name for the entry point
-        return _fixupSymbolName($"wasm_native_to_interp_{method.DeclaringType!.Module!.Assembly!.GetName()!.Name!}_{method.DeclaringType.Name}_{method.Name}");
+        string namespaceName = method.DeclaringType?.Namespace ?? string.Empty;
+        string assemblyName = method.DeclaringType?.Module?.Assembly?.GetName()?.Name ?? string.Empty;
+        string declaringTypeName = method.DeclaringType?.Name ?? string.Empty;
+
+        string entryPoint = $"wasm_native_to_interp_{namespaceName}_{assemblyName}_{declaringTypeName}_{method.Name}";
+
+        return _fixupSymbolName(entryPoint);
     }
 
     private string DelegateKey(PInvokeCallback export)
@@ -390,10 +396,11 @@ private void EmitNativeToInterp(StreamWriter w, List<PInvokeCallback> callbacks)
             sb.Append($"  if (!(WasmInterpEntrySig_{cb_index})wasm_native_to_interp_ftndescs [{cb_index}].func) {{\n");
             var assemblyFullName = cb.Method.DeclaringType == null ? "" : cb.Method.DeclaringType.Assembly.FullName;
             var assemblyName = assemblyFullName != null && assemblyFullName.Split(',').Length > 0 ? assemblyFullName.Split(',')[0].Trim() : "";
-            var typeName = cb.Method.DeclaringType == null  || cb.Method.DeclaringType.FullName == null ? "" : cb.Method.DeclaringType.FullName;
+            var namespaceName = cb.Method.DeclaringType == null ? "" : cb.Method.DeclaringType.Namespace;
+            var typeName = cb.Method.DeclaringType == null  || cb.Method.DeclaringType.Name == null ? "" : cb.Method.DeclaringType.Name;
             var methodName = cb.Method.Name;
             int numParams = method.GetParameters().Length;
-            sb.Append($"   mono_wasm_marshal_get_managed_wrapper (\"{assemblyName}\", \"{typeName}\", \"{methodName}\", {numParams});\n");
+            sb.Append($"   mono_wasm_marshal_get_managed_wrapper (\"{assemblyName}\",\"{namespaceName}\", \"{typeName}\", \"{methodName}\", {numParams});\n");
             sb.Append($"  }}\n");
 
             sb.Append($"  ((WasmInterpEntrySig_{cb_index})wasm_native_to_interp_ftndescs [{cb_index}].func) (");