| # Copyright 2018-2021 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/>. |
| |
| # This tests some non-standard DWARF spotted in an Intel C Compiler |
| # generated binary. |
| # |
| # The DWARF standard (V5 3.3.2) says that a void C function should not |
| # have a DW_AT_type attribute, however, an ICC compiled binary was |
| # found to have a DW_AT_type that referenced a signed integer type, of |
| # size 0, with the name 'void'. |
| # |
| # This 'void' integer type would cause GDB to crash in some cases, one |
| # that was seen was when using 'finish' to leave the void function. |
| |
| 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 .S |
| |
| # Make some DWARF for the test. |
| set asm_file [standard_output_file $srcfile2] |
| Dwarf::assemble $asm_file { |
| global srcfile |
| |
| cu {} { |
| DW_TAG_compile_unit { |
| {DW_AT_producer "Intel(R) C Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.5.212 Build 20150212"} |
| {DW_AT_language @DW_LANG_C} |
| {DW_AT_name $srcfile} |
| {DW_AT_comp_dir /tmp} |
| } { |
| declare_labels int_type void_type ptr_type |
| |
| int_type: DW_TAG_base_type { |
| {DW_AT_byte_size 4 DW_FORM_sdata} |
| {DW_AT_encoding @DW_ATE_signed} |
| {DW_AT_name int} |
| } |
| |
| void_type: DW_TAG_base_type { |
| {DW_AT_byte_size 0 DW_FORM_sdata} |
| {DW_AT_encoding @DW_ATE_signed} |
| {DW_AT_name void} |
| } |
| |
| ptr_type: DW_TAG_pointer_type { |
| {DW_AT_type :$void_type} |
| } |
| |
| DW_TAG_subprogram { |
| {MACRO_AT_func {func}} |
| {type :$void_type} |
| } |
| DW_TAG_subprogram { |
| {MACRO_AT_func {main}} |
| {type :$int_type} |
| } |
| |
| DW_TAG_variable { |
| {DW_AT_name "var_a"} |
| {DW_AT_type :$int_type} |
| {DW_AT_external 1 DW_FORM_flag} |
| {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr} |
| } |
| |
| DW_TAG_variable { |
| {DW_AT_name "var_ptr"} |
| {DW_AT_type :$ptr_type} |
| {DW_AT_external 1 DW_FORM_flag} |
| {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_ptr"]} SPECIAL_expr} |
| } |
| } |
| } |
| } |
| |
| if { [prepare_for_testing "failed to prepare" ${testfile} \ |
| [list $srcfile $asm_file] {nodebug}] } { |
| return -1 |
| } |
| |
| if ![runto_main] { |
| return -1 |
| } |
| |
| # Place a breakpoint in 'func' and continue to there. |
| gdb_breakpoint func |
| gdb_continue_to_breakpoint "func" |
| |
| # Check how GDB handles the void* variable. |
| gdb_test "p *var_ptr" "Attempt to dereference a generic pointer." \ |
| "check that dereferencing a void* gives a suitable message" |
| |
| # Now finish, returning to main. |
| gdb_test "finish" [multi_line \ |
| "Run till exit from #0 $hex in func \\\(\\\)" \ |
| "$hex in main \\\(\\\)"] \ |
| "check that finish completes" |