Fix crash in ada_print_type

The "varstring" paramter to ada_print_type can be null, but one spot
failed to check this.  This could cause a crash in some situations.

As this is Ada-specific, and we've been using it internally at AdaCore
for a while, I am going to push it.

3 files changed, 64 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.ada/overload_menu_crash/main.adb b/gdb/testsuite/gdb.ada/overload_menu_crash/main.adb
new file mode 100644
index 0000000..3d3e516
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/overload_menu_crash/main.adb
@@ -0,0 +1,21 @@
+--  Copyright 2022 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/>.
+
+with Pck;
+
+procedure Main is
+begin
+   Pck.Inner.Regtest := Pck.Regtest (null); -- BREAK
+end Main;
diff --git a/gdb/testsuite/gdb.ada/overload_menu_crash/pck.adb b/gdb/testsuite/gdb.ada/overload_menu_crash/pck.adb
new file mode 100644
index 0000000..cf01fb3
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/overload_menu_crash/pck.adb
@@ -0,0 +1,21 @@
+--  Copyright 2022 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/>.
+
+package body Pck is
+   function Regtest (A : access Integer) return Boolean is
+   begin
+      return True;
+   end Regtest;
+end Pck;
diff --git a/gdb/testsuite/gdb.ada/overload_menu_crash/pck.ads b/gdb/testsuite/gdb.ada/overload_menu_crash/pck.ads
new file mode 100644
index 0000000..f0ff4f4
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/overload_menu_crash/pck.ads
@@ -0,0 +1,22 @@
+--  Copyright 2022 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/>.
+
+package Pck is
+   package Inner is
+      Regtest : Boolean;
+   end Inner;
+
+   function Regtest (A : access Integer) return Boolean;
+end Pck;