1 # Copyright 2018-2024 Free Software Foundation, Inc.
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.
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.
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/>.
16 # This tests some non-standard DWARF spotted in an Intel C Compiler
19 # The DWARF standard (V5 3.3.2) says that a void C function should not
20 # have a DW_AT_type attribute, however, an ICC compiled binary was
21 # found to have a DW_AT_type that referenced a signed integer type, of
22 # size 0, with the name 'void'.
24 # This 'void' integer type would cause GDB to crash in some cases, one
25 # that was seen was when using 'finish' to leave the void function.
29 # This test can only be run on targets which support DWARF-2 and use gas.
30 require dwarf2_support
32 standard_testfile .c .S
34 # Make some DWARF for the test.
35 set asm_file [standard_output_file $srcfile2]
36 Dwarf::assemble $asm_file {
41 {DW_AT_producer "Intel(R) C Intel(R) 64 Compiler XE for applications running on Intel(R) 64, Version 14.0.5.212 Build 20150212"}
42 {DW_AT_language @DW_LANG_C}
46 declare_labels int_type void_type ptr_type
48 int_type: DW_TAG_base_type {
49 {DW_AT_byte_size 4 DW_FORM_sdata}
50 {DW_AT_encoding @DW_ATE_signed}
54 void_type: DW_TAG_base_type {
55 {DW_AT_byte_size 0 DW_FORM_sdata}
56 {DW_AT_encoding @DW_ATE_signed}
60 ptr_type: DW_TAG_pointer_type {
61 {DW_AT_type :$void_type}
65 {MACRO_AT_func {func}}
69 {MACRO_AT_func {main}}
75 {DW_AT_type :$int_type}
76 {DW_AT_external 1 DW_FORM_flag}
77 {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr}
81 {DW_AT_name "var_ptr"}
82 {DW_AT_type :$ptr_type}
83 {DW_AT_external 1 DW_FORM_flag}
84 {DW_AT_location {DW_OP_addr [gdb_target_symbol "var_ptr"]} SPECIAL_expr}
90 if { [prepare_for_testing "failed to prepare" ${testfile} \
91 [list $srcfile $asm_file] {nodebug}] } {
99 # Place a breakpoint in 'func' and continue to there.
101 gdb_continue_to_breakpoint "func"
103 # Check how GDB handles the void* variable.
104 gdb_test "p *var_ptr" "Attempt to dereference a generic pointer." \
105 "check that dereferencing a void* gives a suitable message"
107 # Now finish, returning to main.
108 gdb_test "finish" [multi_line \
109 "Run till exit from #0 $hex in func \\\(\\\)" \
110 "$hex in main \\\(\\\)"] \
111 "check that finish completes"