value_fetch_lazy, ensure parent is not lazy and check parent for validity.

  http://sourceware.org/ml/gdb-patches/2013-07/msg00316.html

gdb/ChangeLog

        * value.c (value_fetch_lazy): Ensure parent value is not lazy
        before checking which bits of the parent, not the child, value are
        valid.

gdb/testsuite/ChangeLog

        * gdb.dwarf2/pieces-optimized-out.exp: New file.
        * gdb.dwarf2/pieces-optimized-out.c: New file.
        * gdb.dwarf2/pieces-optimized-out.S: New file.

1 files changed, 49 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp b/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp
new file mode 100644
index 0000000..2e4d028
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/pieces-optimized-out.exp
@@ -0,0 +1,49 @@
+# 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 dwarf.exp
+# Test some DWARF piece operators.
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0  
+}
+# This test can only be run on x86 targets.
+if {![is_x86_like_target]} {
+    return 0  
+}
+
+standard_testfile .S
+set csrcfile ${testfile}.c
+
+if {[prepare_for_testing ${testfile}.exp ${testfile} $srcfile]} {
+    return -1
+}
+
+if ![runto foo] {
+    return -1
+}
+
+# Move back up to main.
+gdb_test "up" "#1  $hex in main.*" "move up a frame"
+
+# Now take a look at the 's' structure.
+gdb_test "p s" \
+    " = {a = 5, b = <optimized out>, c = <optimized out>, d = <optimized out>}" \
+    "print s"
+gdb_test "p s.a" " = 5" "print s.a"
+gdb_test "p s.b" " = <optimized out>" "print s.b"
+gdb_test "p s.c" "value has been optimized out" "print s.c"
+gdb_test "p s.d" "value has been optimized out" "print s.d"
+