1 files changed, 95 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.dwarf2/dynamic-bit-offset.exp b/gdb/testsuite/gdb.dwarf2/dynamic-bit-offset.exp
new file mode 100644
index 0000000..f4e02da
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/dynamic-bit-offset.exp
@@ -0,0 +1,95 @@
+# Copyright 2025 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 DW_AT_data_bit_offset with an expression.  This is a DWARF
+# extension, but expected to be in DWARF 6.  See
+# https://dwarfstd.org/issues/250501.1.html
+
+load_lib dwarf.exp
+
+# This test can only be run on targets which support DWARF-2 and use gas.
+require dwarf2_support
+
+standard_testfile ada-array-bound.c -debug.S
+
+# Set up the DWARF for the test.
+
+set asm_file [standard_output_file $srcfile2]
+Dwarf::assemble $asm_file {
+    global srcdir subdir srcfile
+
+    cu {} {
+	DW_TAG_compile_unit {
+		{DW_AT_language @DW_LANG_Ada95}
+		{DW_AT_name	$srcfile}
+	} {
+	    declare_labels byte array struct
+
+	    byte: DW_TAG_base_type {
+		{DW_AT_byte_size 1 DW_FORM_sdata}
+		{DW_AT_encoding	 @DW_ATE_unsigned}
+		{DW_AT_name	 byte}
+	    }
+
+	    array: DW_TAG_array_type {
+		{DW_AT_name array_type}
+		{DW_AT_type :$byte}
+	    } {
+		DW_TAG_subrange_type {
+		    {DW_AT_type	       :$byte}
+		    {DW_AT_upper_bound 3 DW_FORM_sdata}
+		}
+	    }
+
+	    struct: DW_TAG_structure_type {
+		{DW_AT_name discriminated}
+		{DW_AT_byte_size 4 DW_FORM_sdata}
+	    } {
+		DW_TAG_member {
+		    {DW_AT_name disc}
+		    {DW_AT_type :$byte}
+		    {DW_AT_data_member_location 0 DW_FORM_sdata}
+		}
+
+		# We know this is always at offset 1 but use an
+		# expression just to test this code path.  This is a
+		# DWARF extension.  See
+		# https://dwarfstd.org/issues/250501.1.html.
+		DW_TAG_member {
+		    {DW_AT_name nums}
+		    {DW_AT_type :$array}
+		    {DW_AT_data_bit_offset {DW_OP_lit8} SPECIAL_expr}
+		}
+	    }
+
+	    DW_TAG_variable {
+		{DW_AT_name "value"}
+		{DW_AT_type :$struct}
+		{DW_AT_external 1 DW_FORM_flag}
+		{DW_AT_location {DW_OP_addr [gdb_target_symbol "our_data"]}
+		    SPECIAL_expr}
+	    }
+	}
+    }
+}
+
+if {[prepare_for_testing "failed to prepare" ${testfile} \
+	 [list $srcfile $asm_file] {nodebug}]} {
+    return -1
+}
+
+gdb_test_no_output "set language ada"
+gdb_test "print value" \
+    [string_to_regexp " = (disc => 3, nums => (7, 11, 13))"]