2 files changed, 79 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.cp/empty-enum.cc b/gdb/testsuite/gdb.cp/empty-enum.cc
new file mode 100644
index 0000000..1a0eece
--- /dev/null
+++ b/gdb/testsuite/gdb.cp/empty-enum.cc
@@ -0,0 +1,31 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+enum enum1 {};
+
+enum class enum2 : unsigned char {};
+
+void
+breakpt (enum1 arg1, enum2 arg2)
+{
+  /* Nothing.  */
+}
+
+int
+main ()
+{
+  breakpt ((enum1) 8, (enum2) 4);
+
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.cp/empty-enum.exp b/gdb/testsuite/gdb.cp/empty-enum.exp
new file mode 100644
index 0000000..83cb8cb
--- /dev/null
+++ b/gdb/testsuite/gdb.cp/empty-enum.exp
@@ -0,0 +1,48 @@
+# Copyright 2023 Free Software Foundation, Inc.
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test how GDB displays empty enums.  At one point an enum with no
+# enumeration values would be considered a flag enum, and, as a
+# consequence any value with that type would display like:
+#
+#   (gdb) print enum_var
+#   $1 = (unknown: 0x8)
+#
+# Which resulted in a lot of noise.  Now GDB treats empty enums as a
+# non-flag enum, and should print them like this:
+#
+#   (gdb) print enum_var
+#   $1 = 8
+#
+# This test checks this behaviour.
+
+standard_testfile .cc
+
+if {[prepare_for_testing "failed to prepare" $testfile $srcfile]} {
+    return -1
+}
+
+if {![runto_main]} {
+    return -1
+}
+
+gdb_breakpoint "breakpt"
+gdb_continue_to_breakpoint "stop in breakpt"
+
+
+gdb_test "print arg1" " = 8"
+gdb_test "print arg2" " = 4"
+
+gdb_test "ptype arg1" "type = enum enum1 : unsigned int \\{\\}"
+gdb_test "ptype arg2" "type = enum class enum2 : unsigned char \\{\\}"