40e3ad0ebb
Here, in dwarfread.c:process_full_comp_unit:
/* Set symtab language to language from DW_AT_language. If the
compilation is from a C file generated by language preprocessors, do
not set the language if it was already deduced by start_subfile. */
if (!(cu->language == language_c
&& COMPUNIT_FILETABS (cust)->language != language_c))
COMPUNIT_FILETABS (cust)->language = cu->language;
in case start_subfile doesn't manage to deduce a language
COMPUNIT_FILETABS(cust)->language ends up as language_unknown, not
language_c. So the condition above evals false and we never set the
language from the cu's language.
gdb/ChangeLog:
2015-08-20 Pedro Alves <palves@redhat.com>
* dwarf2read.c (process_full_comp_unit): To tell whether
start_subfile managed to deduce a language, test for
language_unknown instead of language_c.
gdb/testsuite/ChangeLog:
2015-08-20 Pedro Alves <palves@redhat.com>
* gdb.dwarf2/comp-unit-lang.exp: New file.
* gdb.dwarf2/comp-unit-lang.c: New file.
80 lines
2.2 KiB
Text
80 lines
2.2 KiB
Text
# Copyright 2014-2015 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 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\\+\\+"
|