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# Copyright 2020-2024 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/>.
# Some compilers give anonymous structures a linkage name, and that
# linkage name doesn't demangle (within GDB calling gdb_demangle
# return NULL). At one point this caused GDB to crash due to
# dereferencing a NULL pointer.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
standard_testfile .c -debug.S
# Set up the DWARF for the test.
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcfile
cu {} {
DW_TAG_compile_unit {
{DW_AT_language @DW_LANG_C_plus_plus}
{DW_AT_name $srcfile}
{DW_AT_comp_dir /tmp}
} {
declare_labels a_l b_l
a_l: DW_TAG_base_type {
{DW_AT_byte_size 4 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_name int}
}
# To expose the bug that existed at one point this
# structure must have a linkage name, but no name, and the
# linkage name is something that doesn't demangle.
b_l: DW_TAG_structure_type {
{DW_AT_byte_size 8 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
{DW_AT_linkage_name <anon>}
} {
member {
{name x}
{type :$a_l}
{data_member_location 0 data1}
}
member {
{name y}
{type :$a_l}
{data_member_location 0 data1}
}
}
DW_TAG_subprogram {
{MACRO_AT_func {main}}
{type :$a_l}
}
DW_TAG_variable {
{type :$b_l}
{external 1 flag}
{DW_AT_name global_var}
{DW_AT_location {
DW_OP_addr [gdb_target_symbol global_var]
} SPECIAL_expr}
}
}
}
}
if { [prepare_for_testing "failed to prepare" ${testfile} \
[list $srcfile $asm_file] {nodebug}] } {
return -1
}
gdb_assert [runto_main] "run to main"
gdb_test "p global_var" " = {x = 0, y = 0}"
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