Add metadata update for overrides (#85182)

src/libraries/System.Runtime.Loader/tests/ApplyUpdateTest.cs

@@ -229,7 +229,6 @@ public void CustomAttributeDelete()
             });
         }
 
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/79043", TestRuntimes.Mono)]
         [ConditionalFact(typeof(ApplyUpdateUtil), nameof (ApplyUpdateUtil.IsSupported))]
         public void AsyncMethodChanges()
         {

src/mono/mono/metadata/metadata.c

@@ -7029,18 +7029,27 @@ mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod
 	if (num_overrides)
 		*num_overrides = 0;
 
-	if (!tdef->base)
+	if (!tdef->base && !image->has_updates)
 		return;
 
 	loc.t = tdef;
 	loc.col_idx = MONO_METHODIMPL_CLASS;
 	loc.idx = mono_metadata_token_index (type_token);
+	loc.result = 0;
 
-	/* FIXME metadata-update */
+	gboolean found = tdef->base && mono_binary_search (&loc, tdef->base, table_info_get_rows (tdef), tdef->row_size, table_locator) != NULL;
 
-	if (!mono_binary_search (&loc, tdef->base, table_info_get_rows (tdef), tdef->row_size, table_locator))
+	if (!found && !image->has_updates)
 		return;
 
+	if (G_UNLIKELY (image->has_updates))  {
+		if (!found && !mono_metadata_update_metadata_linear_search (image, tdef, &loc, table_locator)) {
+			mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_METADATA_UPDATE, "NO Found interfaces for class 0x%08x", type_token);
+			return;
+		}
+		mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_METADATA_UPDATE, "Found interfaces for class 0x%08x starting at 0x%08x", type_token, loc.result);
+	}
+
 	start = loc.result;
 	end = start + 1;
 	/*
@@ -7052,7 +7061,7 @@ mono_class_get_overrides_full (MonoImage *image, guint32 type_token, MonoMethod
 		else
 			break;
 	}
-	guint32 rows = table_info_get_rows (tdef);
+	guint32 rows = mono_metadata_table_num_rows (image, MONO_TABLE_METHODIMPL);
 	while (end < rows) {
 		if (loc.idx == mono_metadata_decode_row_col (tdef, end, MONO_METHODIMPL_CLASS))
 			end++;