1# Copyright 2020 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16# Some compilers give anonymous structures a linkage name, and that 17# linkage name doesn't demangle (within GDB calling gdb_demangle 18# return NULL). At one point this caused GDB to crash due to 19# dereferencing a NULL pointer. 20 21load_lib dwarf.exp 22 23# This test can only be run on targets which support DWARF-2 and use gas. 24if {![dwarf2_support]} { 25 return 0 26} 27 28standard_testfile cpp-linkage-name.c cpp-linkage-name-debug.S 29 30# Set up the DWARF for the test. 31set asm_file [standard_output_file $srcfile2] 32Dwarf::assemble $asm_file { 33 cu {} { 34 DW_TAG_compile_unit { 35 {DW_AT_language @DW_LANG_C_plus_plus} 36 {DW_AT_name ada-linkage-name.c} 37 {DW_AT_comp_dir /tmp} 38 39 } { 40 declare_labels a_l b_l 41 42 a_l: DW_TAG_base_type { 43 {DW_AT_byte_size 4 DW_FORM_sdata} 44 {DW_AT_encoding @DW_ATE_signed} 45 {DW_AT_name int} 46 } 47 48 # To expose the bug that existed at one point this 49 # structure must have a linkage name, but no name, and the 50 # linkage name is something that doesn't demangle. 51 b_l: DW_TAG_structure_type { 52 {DW_AT_byte_size 8 DW_FORM_sdata} 53 {DW_AT_encoding @DW_ATE_signed} 54 {DW_AT_linkage_name <anon>} 55 } { 56 member { 57 {name x} 58 {type :$a_l} 59 {data_member_location 0 data1} 60 } 61 member { 62 {name y} 63 {type :$a_l} 64 {data_member_location 0 data1} 65 } 66 } 67 DW_TAG_subprogram { 68 {MACRO_AT_func {main}} 69 {type :$a_l} 70 } 71 DW_TAG_variable { 72 {type :$b_l} 73 {external 1 flag} 74 {DW_AT_name global_var} 75 {DW_AT_location { 76 DW_OP_addr [gdb_target_symbol global_var] 77 } SPECIAL_expr} 78 } 79 } 80 } 81} 82 83if { [prepare_for_testing "failed to prepare" ${testfile} \ 84 [list $srcfile $asm_file] {nodebug}] } { 85 return -1 86} 87 88gdb_assert [runto_main] "run to main" 89gdb_test "p global_var" " = {x = 0, y = 0}" 90