[RFA/Python] Fix int() builtin with range type gdb.Value objects.

[Joel Brobecker <brobecker at adacore dot com>]

Hello,

Consider the following variable:

    type Small is range -128 .. 127;
    SR : Small := 48;

Trying to get its value as an integer within Python code yields:

    (gdb) python sr = gdb.parse_and_eval('sr')
    (gdb) python print int(sr)
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
    gdb.error: Cannot convert value to int.
    Error while executing Python code.

This is happening because our variable is a range type, and
py-value's is_intlike does not handle TYPE_CODE_RANGE. This
patch fixes this.

gdb/ChangeLog:

        * python/py-value.c (is_intlike): Add TYPE_CODE_RANGE handling.

gdb/testsuite/ChangeLog:

        * gdb.ada/py_range: New testcase.

Tested on x86_64-linux. OK to apply?

Looking beyond this issue, I compared this function with is_integral_type,
and found that is_integral_type also accepts TYPE_CODE_FLAGS. It seems
like we could probably do the same in is_intlike?

Thank you,
-- 
Joel

---
 gdb/python/py-value.c                  |  1 +
 gdb/testsuite/gdb.ada/py_range.exp     | 40 ++++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.ada/py_range/foo.adb | 32 +++++++++++++++++++++++++++
 gdb/testsuite/gdb.ada/py_range/pck.adb | 23 +++++++++++++++++++
 gdb/testsuite/gdb.ada/py_range/pck.ads | 22 +++++++++++++++++++
 5 files changed, 118 insertions(+)
 create mode 100644 gdb/testsuite/gdb.ada/py_range.exp
 create mode 100644 gdb/testsuite/gdb.ada/py_range/foo.adb
 create mode 100644 gdb/testsuite/gdb.ada/py_range/pck.adb
 create mode 100644 gdb/testsuite/gdb.ada/py_range/pck.ads

diff --git a/gdb/python/py-value.c b/gdb/python/py-value.c
index 07feaf8..451bfaf 100644
--- a/gdb/python/py-value.c
+++ b/gdb/python/py-value.c
@@ -1137,6 +1137,7 @@ is_intlike (struct type *type, int ptr_ok)
 	  || TYPE_CODE (type) == TYPE_CODE_ENUM
 	  || TYPE_CODE (type) == TYPE_CODE_BOOL
 	  || TYPE_CODE (type) == TYPE_CODE_CHAR
+	  || TYPE_CODE (type) == TYPE_CODE_RANGE
 	  || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR));
 }
 
diff --git a/gdb/testsuite/gdb.ada/py_range.exp b/gdb/testsuite/gdb.ada/py_range.exp
new file mode 100644
index 0000000..f24a06a
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/py_range.exp
@@ -0,0 +1,40 @@
+# Copyright 2013 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"
+load_lib gdb-python.exp
+
+standard_ada_testfile foo
+
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug]] != "" } {
+  return -1
+}
+
+clean_restart ${testfile}
+
+# Skip this testcase if Python scripting is not enabled.
+if { [skip_python_tests] } { continue }
+
+set bp_location [gdb_get_line_number "STOP" ${testdir}/foo.adb]
+runto "foo.adb:$bp_location"
+
+gdb_test "python print int(gdb.parse_and_eval('sr'))" \
+         "48"
+
+gdb_test "python print int(gdb.parse_and_eval('si'))" \
+         "740804"
+
+gdb_test "python print int(gdb.parse_and_eval('ir'))" \
+         "974"
diff --git a/gdb/testsuite/gdb.ada/py_range/foo.adb b/gdb/testsuite/gdb.ada/py_range/foo.adb
new file mode 100644
index 0000000..850b10f
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/py_range/foo.adb
@@ -0,0 +1,32 @@
+--  Copyright 2013 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 Small is range -128 .. 127;
+   SR : Small := 48;
+
+   type Small_Integer is range -2 ** 31 .. 2 ** 31 - 1;
+   SI : Small_Integer := 740804;
+
+   type Integer4_T is range -2 ** 31 .. 2 ** 31 - 1;
+   for Integer4_T'Size use 32;
+   IR : Integer4_T := 974;
+begin
+   Do_Nothing (SR'Address);  -- STOP
+   Do_Nothing (SI'Address);
+   Do_Nothing (IR'Address);
+end Foo;
diff --git a/gdb/testsuite/gdb.ada/py_range/pck.adb b/gdb/testsuite/gdb.ada/py_range/pck.adb
new file mode 100644
index 0000000..6b3d3c0
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/py_range/pck.adb
@@ -0,0 +1,23 @@
+--  Copyright 2007-2013 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/py_range/pck.ads b/gdb/testsuite/gdb.ada/py_range/pck.ads
new file mode 100644
index 0000000..e5f3fc0
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/py_range/pck.ads
@@ -0,0 +1,22 @@
+--  Copyright 2007-2013 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;
-- 
1.8.1.2