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# Copyright 2014-2020 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
# 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 <>.
# Test that GDB determines the frame's language based on the comp
# unit's language, even if the file has an unknown file extension,
# such as ".txt".
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use
# gas.
if {![dwarf2_support]} {
return 0
standard_testfile .c comp-unit-lang.S
# Assemble the DWARF using CU_LANG as compilation unit's language.
# Run to a function in that compilation unit and check that GDB
# figures out that the language is GDB_LANG.
proc do_test {cu_lang gdb_lang} {
global testfile srcfile srcfile2
# Make some DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
upvar cu_lang cu_lang
# Creating a CU with 4-byte addresses lets this test link on
# both 32- and 64-bit machines.
cu { addr_size 4 } {
extern func_start func_end
compile_unit {
{name file1.txt}
{language @$cu_lang}
{low_pc func_start addr}
{high_pc func_end addr}
} {
subprogram {
{external 1 flag}
{name func}
{low_pc func_start addr}
{high_pc func_end addr}
} {
if { [prepare_for_testing "failed to prepare" ${testfile} \
[list $srcfile $asm_file] {nodebug}] } {
return -1
if ![runto func] {
return -1
gdb_test "show language" "\"auto; currently $gdb_lang\".*"
# Some paths in the debugger fall back to C. Check C++ as well to
# make sure the test doesn't happen to work because of such a
# fallback.
do_test DW_LANG_C "c"
do_test DW_LANG_C_plus_plus "c\\+\\+"