gdb/

	* dwarf2read.c (dwarf2_get_pc_bounds): Require HIGH strictly higher
	than LOW.  Comment it.
	(read_partial_die): Call complaint for inappropriate zero LOWPC or
	HIGHPC not strictly higher than LOWPC.

gdb/testsuite/
	* gdb.dwarf2/dw2-empty-pc-range.S: New file.
	* gdb.dwarf2/dw2-empty-pc-range.exp: New file.
	* gdb.dwarf2/pr11465.S: New .text labels text_start and text_end.
	Provide a stub byte there.
	(DW_TAG_compile_unit): Set DW_AT_low_pc, DW_AT_high_pc and
	DW_AT_entry_pc.
	(dieb4, dieda): Set DW_AT_high_pc higher than DW_AT_low_pc.

1 files changed, 40 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.exp b/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.exp
new file mode 100644
index 0000000..6835b79
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dw2-empty-pc-range.exp
@@ -0,0 +1,40 @@
+# Copyright 2011 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
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+if {![dwarf2_support]} {
+    return 0  
+}
+
+set testfile "dw2-empty-pc-range"
+set srcfile ${testfile}.S
+set executable ${testfile}.x
+set binfile ${objdir}/${subdir}/${executable}
+
+if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" object {}] != "" } {
+    return -1
+}
+
+clean_restart $executable
+gdb_test "ptype emptyrange" {No symbol "emptyrange" in current context\.} \
+	 "empty range before CU load"
+
+# Force loading the CU
+gdb_test "ptype realrange" {type = void \(void\)} \
+	 "valid range after CU load"
+
+gdb_test "ptype emptyrange" {No symbol "emptyrange" in current context\.} \
+	 "empty range after CU load"