New GDB/MI commands to catch Ada exceptions

This patch introduces two new GDB/MI commands implementing the equivalent
of the "catch exception" and  "catch assert" GDB/CLI commands.

gdb/ChangeLog:

        * breakpoint.h (init_ada_exception_breakpoint): Add parameter
        "enabled".
        * breakpoint.c (init_ada_exception_breakpoint): Add parameter
        "enabled".  Set B->ENABLE_STATE accordingly.
        * ada-lang.h (ada_exception_catchpoint_kind): Move here from
        ada-lang.c.
        (create_ada_exception_catchpoint): Add declaration.
        * ada-lang.c (ada_exception_catchpoint_kind): Move to ada-lang.h.
        (create_ada_exception_catchpoint): Make non-static. Add new
        parameter "disabled". Use it in call to
        init_ada_exception_breakpoint.
        (catch_ada_exception_command): Add parameter "enabled" in call
        to create_ada_exception_catchpoint.
        (catch_assert_command): Likewise.

        * mi/mi-cmds.h (mi_cmd_catch_assert, mi_cmd_catch_exception):
        Add declarations.
        * mi/mi-cmds.c (mi_cmds): Add the "catch-assert" and
        "catch-exception" commands.
        * mi/mi-cmd-catch.c: Add #include "ada-lang.h".
        (mi_cmd_catch_assert, mi_cmd_catch_exception): New functions.

gdb/ada-lang.c

@@ -10981,16 +10981,6 @@ ada_modulus (struct type *type)
    variants of the runtime, we use a sniffer that will determine
    the runtime variant used by the program being debugged.  */
 
-/* The different types of catchpoints that we introduced for catching
-   Ada exceptions.  */
-
-enum ada_exception_catchpoint_kind
-{
-  ada_catch_exception,
-  ada_catch_exception_unhandled,
-  ada_catch_assert
-};
-
 /* Ada's standard exceptions.  */
 
 static char *standard_exc[] = {
@@ -12190,12 +12180,13 @@ ada_exception_sal (enum ada_exception_catchpoint_kind ex, char *excep_string,
 
    FROM_TTY is the usual argument passed to all commands implementations.  */
 
-static void
+void
 create_ada_exception_catchpoint (struct gdbarch *gdbarch,
 				 enum ada_exception_catchpoint_kind ex_kind,
 				 char *excep_string,
 				 char *cond_string,
 				 int tempflag,
+				 int disabled,
 				 int from_tty)
 {
   struct ada_catchpoint *c;
@@ -12206,7 +12197,7 @@ create_ada_exception_catchpoint (struct gdbarch *gdbarch,
 
   c = XNEW (struct ada_catchpoint);
   init_ada_exception_breakpoint (&c->base, gdbarch, sal, addr_string,
-				 ops, tempflag, from_tty);
+				 ops, tempflag, disabled, from_tty);
   c->excep_string = excep_string;
   create_excep_cond_exprs (c);
   if (cond_string != NULL)
@@ -12234,7 +12225,8 @@ catch_ada_exception_command (char *arg, int from_tty,
 				     &cond_string);
   create_ada_exception_catchpoint (gdbarch, ex_kind,
 				   excep_string, cond_string,
-				   tempflag, from_tty);
+				   tempflag, 1 /* enabled */,
+				   from_tty);
 }
 
 /* Split the arguments specified in a "catch assert" command.
@@ -12284,7 +12276,8 @@ catch_assert_command (char *arg, int from_tty,
   catch_ada_assert_command_split (arg, &cond_string);
   create_ada_exception_catchpoint (gdbarch, ada_catch_assert,
 				   NULL, cond_string,
-				   tempflag, from_tty);
+				   tempflag, 1 /* enabled */,
+				   from_tty);
 }
                                 /* Operators */
 /* Information about operators given special treatment in functions