[RFA] PR 11530: Fix and test case

["Pierre Muller" <pierre dot muller at ics-cnrs dot unistra dot fr>]

 This is a problem reported by Jan Kratochvil
http://sourceware.org/bugzilla/show_bug.cgi?id=11530

  After some debugging, I found this fix,
and wrote a test case.
  Tested on gcc16 2 FAIL within gdb11530.exp
with pristine disappear with patched versions.
  No other change (apart from the tests
that are unstable, like:
ext-run.exp (I often get an 'internal buffer is full' error
for that test)
attach-into-signal.exp
and watchthreads2.exp

Is this patch OK?

Pierre Muller
Pascal language support maintainer for GDB

 
2010-04-29  Pierre Muller  <muller@ics.u-strasbg.fr>

	PR exp/11530.
	* gdbtypes.c (lookup_struct_elt_type): Also lookup
	names of unnamed structures or unions.

testsuite ChangeLog entry:

2010-04-29  Pierre Muller  <muller@ics.u-strasbg.fr>

	PR exp/11530.
	* testsuite/gdb.base/gdb11530.c: New file.
	* testsuite/gdb.base/gdb11530.exp: New file.


Index: src/gdb/gdbtypes.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbtypes.c,v
retrieving revision 1.189
diff -u -p -r1.189 gdbtypes.c
--- src/gdb/gdbtypes.c	21 Apr 2010 23:21:03 -0000	1.189
+++ src/gdb/gdbtypes.c	29 Apr 2010 21:23:35 -0000
@@ -1246,6 +1246,13 @@ lookup_struct_elt_type (struct type *typ
 	{
 	  return TYPE_FIELD_TYPE (type, i);
 	}
+      else if (!t_field_name || *t_field_name == '\0')
+	{
+	  struct type *subtype = lookup_struct_elt_type (
+				   TYPE_FIELD_TYPE (type, i), name, 1);
+	  if (subtype != NULL)
+	    return subtype;
+	}
     }
 
   /* OK, it's not in this class.  Recursively check the baseclasses.  */
Index: src/gdb/testsuite/gdb.base/gdb11530.c
===================================================================
RCS file: testsuite/gdb.base/gdb11530.c
diff -N testsuite/gdb.base/gdb11530.c
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/gdb/testsuite/gdb.base/gdb11530.c	29 Apr 2010 21:23:37 -0000
@@ -0,0 +1,35 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010 Free Software Foundation, Inc.
+
+   Contributed by Pierre Muller.
+
+   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/>.
+
+   Test for problem related to unnamed unions.  */
+
+struct a
+  {
+    union
+      {
+        int i;
+      };
+  } a;
+
+int
+main (void)
+{
+  return sizeof (a.i);
+}
+
Index: src/gdb/testsuite/gdb.base/gdb11530.exp
===================================================================
RCS file: testsuite/gdb.base/gdb11530.exp
diff -N testsuite/gdb.base/gdb11530.exp
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ src/gdb/testsuite/gdb.base/gdb11530.exp	29 Apr 2010 21:23:37 -0000
@@ -0,0 +1,44 @@
+# This testcase is part of GDB, the GNU debugger.
+
+# Copyright 2010 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/>.
+
+# Test GDB bug report 11531.
+# This is a problem related to CANNOT_STEP_HW_WATCHPOINTS macro.
+# It affects Solaris native targets.
+
+if $tracelevel then {
+	strace $tracelevel
+}
+
+set prms_id 0
+set bug_id 0
+
+set testfile "gdb11530"
+
+if { [prepare_for_testing $testfile.exp $testfile $testfile.c {debug}] } {
+    return -1;
+}
+
+
+if { ![runto main] } then {
+    fail "run to main"
+    return
+}
+
+gdb_test "print a.i" " = 0"
+gdb_test "print sizeof (a.i)" " = \[0-9\]+"
+gdb_test "print sizeof (a.i) == sizeof (int)" " = 1"
+