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.

gdb/mi/mi-cmd-info.c

@@ -19,6 +19,57 @@
 #include "defs.h"
 #include "osdata.h"
 #include "mi-cmds.h"
+#include "ada-lang.h"
+#include "arch-utils.h"
+
+/* Implement the "-info-ada-exceptions" GDB/MI command.  */
+
+void
+mi_cmd_info_ada_exceptions (char *command, char **argv, int argc)
+{
+  struct ui_out *uiout = current_uiout;
+  struct gdbarch *gdbarch = get_current_arch ();
+  char *regexp;
+  struct cleanup *old_chain;
+  VEC(ada_exc_info) *exceptions;
+  int ix;
+  struct ada_exc_info *info;
+
+  switch (argc)
+    {
+    case 0:
+      regexp = NULL;
+      break;
+    case 1:
+      regexp = argv[0];
+      break;
+    default:
+      error (_("Usage: -info-ada-exceptions [REGEXP]"));
+      break;
+    }
+
+  exceptions = ada_exceptions_list (regexp);
+  old_chain = make_cleanup (VEC_cleanup (ada_exc_info), &exceptions);
+
+  make_cleanup_ui_out_table_begin_end
+    (uiout, 2, VEC_length (ada_exc_info, exceptions), "ada-exceptions");
+  ui_out_table_header (uiout, 1, ui_left, "name", "Name");
+  ui_out_table_header (uiout, 1, ui_left, "address", "Address");
+  ui_out_table_body (uiout);
+
+  for (ix = 0; VEC_iterate(ada_exc_info, exceptions, ix, info); ix++)
+    {
+      struct cleanup *sub_chain;
+
+      sub_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
+      ui_out_field_string (uiout, "name", info->name);
+      ui_out_field_core_addr (uiout, "address", gdbarch, info->addr);
+
+      do_cleanups (sub_chain);
+    }
+
+  do_cleanups (old_chain);
+}
 
 void
 mi_cmd_info_os (char *command, char **argv, int argc)

gdb/mi/mi-cmds.c

@@ -124,6 +124,7 @@ static struct mi_cmd mi_cmds[] =
   DEF_MI_CMD_CLI ("gdb-version", "show version", 0),
   DEF_MI_CMD_MI ("inferior-tty-set", mi_cmd_inferior_tty_set),
   DEF_MI_CMD_MI ("inferior-tty-show", mi_cmd_inferior_tty_show),
+  DEF_MI_CMD_MI ("info-ada-exceptions", mi_cmd_info_ada_exceptions),
   DEF_MI_CMD_MI ("info-os", mi_cmd_info_os),
   DEF_MI_CMD_MI ("interpreter-exec", mi_cmd_interpreter_exec),
   DEF_MI_CMD_MI ("list-features", mi_cmd_list_features),

gdb/mi/mi-cmds.h

@@ -73,6 +73,7 @@ extern mi_cmd_argv_ftype mi_cmd_file_list_exec_source_files;
 extern mi_cmd_argv_ftype mi_cmd_gdb_exit;
 extern mi_cmd_argv_ftype mi_cmd_inferior_tty_set;
 extern mi_cmd_argv_ftype mi_cmd_inferior_tty_show;
+extern mi_cmd_argv_ftype mi_cmd_info_ada_exceptions;
 extern mi_cmd_argv_ftype mi_cmd_info_os;
 extern mi_cmd_argv_ftype mi_cmd_interpreter_exec;
 extern mi_cmd_argv_ftype mi_cmd_list_features;

gdb/mi/mi-main.c

@@ -1815,6 +1815,7 @@ mi_cmd_list_features (char *command, char **argv, int argc)
       ui_out_field_string (uiout, NULL, "data-read-memory-bytes");
       ui_out_field_string (uiout, NULL, "breakpoint-notifications");
       ui_out_field_string (uiout, NULL, "ada-task-info");
+      ui_out_field_string (uiout, NULL, "info-ada-exceptions");
       
 #if HAVE_PYTHON
       if (gdb_python_initialized)

gdb/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+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.

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"
+

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;

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;