[Ada] whatis not printing array type name for value from history

Consider the following declaration:

   type Full_Table is array (Color) of Integer;
   Full : Full_Table := (144, 233, 377, 610, 987);

The debugger correctly prints the type name of variable "full":

        (gdb) whatis full
        type = pck.full_table

But is unable to do so when using the value history:

        (gdb) print full
        $1 = (144, 233, 377, 610, 987)
        (gdb) whatis $
 !!! -> type = array (black .. white) of integer

This is because the evaluation creates a "fixed" version of
the array type, and that "fixed" version is missing a type name.
As a result, whatis falls back to describing the type (a la ptype)
instead of printing the type name.

gdb/ChangeLog:

        * ada-lang.c (to_fixed_array_type): Set result's type name.

gdb/testsuite/ChangeLog:

        * gdb.ada/whatis_array_val: New testcase.

7 files changed, 124 insertions, 0 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index aebc59f..87567e9 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
 2012-02-29  Joel Brobecker  <brobecker@adacore.com>
 
+	* ada-lang.c (to_fixed_array_type): Set result's type name.
+
+2012-02-29  Joel Brobecker  <brobecker@adacore.com>
+
 	* ada-lang.c (catch_ada_exception_command_split): Add new
 	argument cond_string.  Add support for condition at end of
 	"catch exception" commands.
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index 216f703..7c13910 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -7826,6 +7826,11 @@ to_fixed_array_type (struct type *type0, struct value *dval,
         error (_("array type with dynamic size is larger than varsize-limit"));
     }
 
+  /* We want to preserve the type name.  This can be useful when
+     trying to get the type name of a value that has already been
+     printed (for instance, if the user did "print VAR; whatis $".  */
+  TYPE_NAME (result) = TYPE_NAME (type0);
+
   if (constrained_packed_array_p)
     {
       /* So far, the resulting type has been created as if the original
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index f8bd318..8a144bc 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2012-02-29  Joel Brobecker  <brobecker@adacore.com>
+
+	* gdb.ada/whatis_array_val: New testcase.
+
 2012-02-29  Jan Kratochvil  <jan.kratochvil@redhat.com>
 
 	Fix disp-step-syscall.exp: fork: single step over fork.
diff --git a/gdb/testsuite/gdb.ada/whatis_array_val.exp b/gdb/testsuite/gdb.ada/whatis_array_val.exp
new file mode 100644
index 0000000..e937f0a
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/whatis_array_val.exp
@@ -0,0 +1,44 @@
+# Copyright 2012 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/>.
+
+load_lib "ada.exp"
+
+set testdir "whatis_array_val"
+set testfile "${testdir}/foo"
+set srcfile ${srcdir}/${subdir}/${testfile}.adb
+set binfile ${objdir}/${subdir}/${testfile}
+
+file mkdir ${objdir}/${subdir}/${testdir}
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug ]] != "" } {
+  return -1
+}
+
+clean_restart ${testfile}
+
+set bp_location [gdb_get_line_number "STOP" ${testdir}/foo.adb]
+if ![runto "foo.adb:$bp_location" ] then {
+  perror "Couldn't run ${testfile}"
+  return
+} 
+
+gdb_test "whatis full" \
+         "type = foo\\.full_table"
+
+gdb_test "print full" \
+         " = \\(144, 233, 377, 610, 987\\)"
+
+gdb_test "whatis $" \
+         "type = foo\\.full_table"
+
diff --git a/gdb/testsuite/gdb.ada/whatis_array_val/foo.adb b/gdb/testsuite/gdb.ada/whatis_array_val/foo.adb
new file mode 100644
index 0000000..8fd6d76
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/whatis_array_val/foo.adb
@@ -0,0 +1,25 @@
+--  Copyright 2012 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; use Pck;
+
+procedure Foo is
+   type Color is (Black, Red, Green, Blue, White);
+   type Full_Table is array (Color) of Integer;
+   Full : Full_Table := (144, 233, 377, 610, 987);
+begin
+   Do_Nothing (Full'Address); -- STOP
+end Foo;
+
diff --git a/gdb/testsuite/gdb.ada/whatis_array_val/pck.adb b/gdb/testsuite/gdb.ada/whatis_array_val/pck.adb
new file mode 100644
index 0000000..17f1ff7
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/whatis_array_val/pck.adb
@@ -0,0 +1,23 @@
+--  Copyright 2011-2012 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
+
+   procedure Do_Nothing (A : System.Address) is
+   begin
+      null;
+   end Do_Nothing;
+
+end Pck;
diff --git a/gdb/testsuite/gdb.ada/whatis_array_val/pck.ads b/gdb/testsuite/gdb.ada/whatis_array_val/pck.ads
new file mode 100644
index 0000000..f99df3d
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/whatis_array_val/pck.ads
@@ -0,0 +1,19 @@
+--  Copyright 2011-2012 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 System;
+package Pck is
+   procedure Do_Nothing (A : System.Address);
+end Pck;