wasm-objdump: Fix type signature for multi-value result types (#1179)

Previously only the first result type was printed, even for
multiple results.

This change prints multiple result types in parenthesized form
whereas single result types are printed as before.

The `func-result-multi.txt` test case is modified to cover the
Type section as well.

1 files changed, 17 insertions, 4 deletions

diff --git a/src/binary-reader-objdump.cc b/src/binary-reader-objdump.cc
index 4b52f86e..054ac21f 100644
--- a/src/binary-reader-objdump.cc
+++ b/src/binary-reader-objdump.cc
@@ -1029,10 +1029,23 @@ Result BinaryReaderObjdump::OnType(Index index,
     printf("%s", GetTypeName(param_types[i]));
   }
   printf(") -> ");
-  if (result_count) {
-    printf("%s", GetTypeName(result_types[0]));
-  } else {
-    printf("nil");
+  switch (result_count) {
+    case 0:
+      printf("nil");
+      break;
+    case 1:
+      printf("%s", GetTypeName(result_types[0]));
+      break;
+    default:
+      printf("(");
+      for (Index i = 0; i < result_count; i++) {
+        if (i != 0) {
+          printf(", ");
+        }
+        printf("%s", GetTypeName(result_types[i]));
+      }
+      printf(")");
+      break;
   }
   printf("\n");
   return Result::Ok;