Implement GDB/MI equivalent of "info exceptions" CLI command.

This patch implements a new GDB/MI command implementing the equivalent
of the "info exceptions" CLI command.  The command syntax is:

    -info-ada-exceptions [REGEXP]

Here is an example of usage (slightly formatted by hand to make it
easier to read):

    -info-ada-exceptions ions\.a_
    ^done,ada-exceptions=
      {nr_rows="2",nr_cols="2",
       hdr=[{width="1",alignment="-1",col_name="name",colhdr="Name"},
            {width="1",alignment="-1",col_name="address",colhdr="Address"}],
       body=[{name="global_exceptions.a_global_exception",
              address="0x0000000000613a80"},
             {name="global_exceptions.a_private_exception",
              address="0x0000000000613ac0"}]}

Also, in order to allow graphical frontends to easily determine
whether this command is available or not, the output of the
"-list-features" command has been augmented to contain
"info-ada-exceptions".

gdb/Changelog:

        * mi/mi-cmds.h (mi_cmd_info_ada_exceptions): Add declaration.
        * mi/mi-cmds.c (mi_cmds): Add entry for -info-ada-exceptions
        command.
        * mi/mi-cmd-info.c: #include "ada-lang.c" and "arch-utils.c".
        (mi_cmd_info_ada_exceptions): New function.
        * mi/mi-main.c (mi_cmd_list_features): Add "info-ada-exceptions".

gdb/testsuite/ChangeLog:

        * gdb.ada/mi_exc_info: New testcase.

4 files changed, 93 insertions, 0 deletions

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index c701537..cb9baa1 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,5 +1,9 @@
 2013-11-12  Joel Brobecker  <brobecker@adacore.com>
 
+	* gdb.ada/mi_exc_info: New testcase.
+
+2013-11-12  Joel Brobecker  <brobecker@adacore.com>
+
 	* gdb.ada/info_exc: New testcase.
 
 2013-11-11  Doug Evans  <dje@google.com>
diff --git a/gdb/testsuite/gdb.ada/mi_exc_info.exp b/gdb/testsuite/gdb.ada/mi_exc_info.exp
new file mode 100644
index 0000000..b77ccbc
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_exc_info.exp
@@ -0,0 +1,51 @@
+# 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"
+
+standard_ada_testfile foo
+
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug]] != "" } {
+  return -1
+}
+
+load_lib mi-support.exp
+set MIFLAGS "-i=mi"
+
+gdb_exit
+if [mi_gdb_start] {
+    continue
+}
+
+mi_delete_breakpoints
+mi_gdb_reinitialize_dir $srcdir/$subdir
+mi_gdb_load ${binfile}
+
+mi_gdb_test "-info-ada-exceptions" \
+  "\\^done,ada-exceptions={nr_rows=\"5\",nr_cols=\"2\",hdr=\\\[{width=\"1\",alignment=\"-1\",col_name=\"name\",colhdr=\"Name\"},{width=\"1\",alignment=\"-1\",col_name=\"address\",colhdr=\"Address\"}\\\],body=\\\[{name=\"constraint_error\",address=\"$hex\"},{name=\"program_error\",address=\"$hex\"},{name=\"storage_error\",address=\"$hex\"},{name=\"tasking_error\",address=\"$hex\"},{name=\"const.aint_global_e\",address=\"$hex\"}\\\]}" \
+  "-info-ada-exceptions"
+
+mi_gdb_test "-info-ada-exceptions task" \
+  "\\^done,ada-exceptions={nr_rows=\"1\",nr_cols=\"2\",hdr=\\\[{width=\"1\",alignment=\"-1\",col_name=\"name\",colhdr=\"Name\"},{width=\"1\",alignment=\"-1\",col_name=\"address\",colhdr=\"Address\"}\\\],body=\\\[{name=\"tasking_error\",address=\"$hex\"}\\\]}" \
+  "-info-ada-exceptions task"
+
+mi_gdb_test "-info-ada-exceptions global" \
+  "\\^done,ada-exceptions={nr_rows=\"1\",nr_cols=\"2\",hdr=\\\[{width=\"1\",alignment=\"-1\",col_name=\"name\",colhdr=\"Name\"},{width=\"1\",alignment=\"-1\",col_name=\"address\",colhdr=\"Address\"}\\\],body=\\\[{name=\"const.aint_global_e\",address=\"$hex\"}\\\]}" \
+  "-info-ada-exceptions global"
+
+mi_gdb_test "-info-ada-exceptions const.aint" \
+  "\\^done,ada-exceptions={nr_rows=\"2\",nr_cols=\"2\",hdr=\\\[{width=\"1\",alignment=\"-1\",col_name=\"name\",colhdr=\"Name\"},{width=\"1\",alignment=\"-1\",col_name=\"address\",colhdr=\"Address\"}\\\],body=\\\[{name=\"constraint_error\",address=\"$hex\"},{name=\"const.aint_global_e\",address=\"$hex\"}\\\]}" \
+  "-info-ada-exceptions const.aint"
+
diff --git a/gdb/testsuite/gdb.ada/mi_exc_info/const.ads b/gdb/testsuite/gdb.ada/mi_exc_info/const.ads
new file mode 100644
index 0000000..753241e
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_exc_info/const.ads
@@ -0,0 +1,18 @@
+--  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/>.
+
+package Const is
+   Aint_Global_E : exception;
+end Const;
diff --git a/gdb/testsuite/gdb.ada/mi_exc_info/foo.adb b/gdb/testsuite/gdb.ada/mi_exc_info/foo.adb
new file mode 100644
index 0000000..e047db2
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_exc_info/foo.adb
@@ -0,0 +1,20 @@
+--  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 Const; use Const;
+procedure Foo is
+begin
+   raise Aint_Global_E;
+end Foo;