+# Copyright 2018-2019 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 "ada.exp"
+
+standard_ada_testfile bla
+set cfile "foo"
+set csrcfile ${srcdir}/${subdir}/${testdir}/${cfile}.c
+set cobject [standard_output_file ${cfile}.o]
+
+gdb_compile "${csrcfile}" "${cobject}" object [list debug]
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug additional_flags=-largs additional_flags=${cobject} additional_flags=-margs]] != "" } {
+ return -1
+}
+
+clean_restart ${testfile}
+
+set bp_location [gdb_get_line_number "STOP" ${testdir}/foo.c]
+runto "foo.c:$bp_location"
+
+gdb_test_no_output "set print frame-arguments all"
+
+# Here is the scenario:
+# - Once stopped in a C function, with language_mode set to auto, print
+# backtrace, we should see the Ada frame arguments printed using Ada
+# syntax.
+# - Set language to C, then check that printing backtrace shows the Ada
+# frame arguments using C syntax.
+# - Set language back to auto, check language mode value, then print
+# backtrace, we should see Ada frame arguments printed using Ada C
+# syntax.
+
+gdb_test "show lang" \
+ "The current source language is \"auto; currently c\"." \
+ "show language when set to 'auto; c'"
+
+gdb_test "bt" \
+ "#1 $hex in pck\\.call_me \\(s=\"test\"\\).*" \
+ "backtrace with auto: c"
+
+gdb_test_no_output "set language c" \
+ "Set current source language to \"manual; currently c\"."
+
+gdb_test "show lang" \
+ "The current source language is \"c\"." \
+ "show language when set to 'c'"
+
+gdb_test "bt" \
+ "#1 $hex in pck\\.call_me \\(s={P_ARRAY = $hex, P_BOUNDS = $hex}\\).*" \
+ "backtrace with language forced to 'c'"
+
+gdb_test_no_output "set language auto" \
+ "Set current source language to \"auto; currently c\"."
+
+gdb_test "show lang" \
+ "The current source language is \"auto; currently c\"." \
+ "show language when set back to 'auto; c'"
+
+gdb_test "bt" \
+ "#1 $hex in pck\\.call_me \\(s=\"test\"\\).*" \
+ "backtrace with language back to 'auto; c'"