[RFA/testsuite/ada] Add null_record testcase

[Joel Brobecker]

This is our first testcase involving an Ada program!

This testcase demonstrate a problem with our dwarf-2 reader, described
in http://sources.redhat.com/ml/gdb-patches/2004-02/msg00533.html.
This test currently fails, and then passes once the suggested patch
is applied.

2004-03-29  J. Brobecker  <brobecker@gnat.com>

        * gdb.ada (bar.ads, bar.adb, null_record.adb): New files.
        * gdb.ada (null_record.exp): New testcase.

Tested on x86-linux (using an Ada-aware version of GDB based on GDB 6.0).
Ok to apply?

Thanks,
-- 
Joel
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package Bar is

   type Empty is null record;

   procedure Do_Nothing;

end Bar;
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package body Bar is

   procedure Do_Nothing is
   begin
      null;
   end Do_Nothing;

end Bar;
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with Bar; use Bar;

procedure Null_Record is
begin
   Do_Nothing;
end Null_Record;

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if $tracelevel then {
    strace $tracelevel
}

load_lib "ada.exp"

set testfile "null_record"
set srcfile ${testfile}.adb
set binfile ${objdir}/${subdir}/${testfile}

if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug ]] != "" } {
  return -1
}

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

gdb_test "begin" \
         "Breakpoint \[0-9\]+ at .*null_record.adb.*" \
         "begin"

gdb_test "ptype empty" \
         "type = record null; end record" \
         "ptype on null record"