1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
# Copyright 2018-2024 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/>.
# This tests some non-standard DWARF that we still expect GDB to be
# able to handle.
#
# The DWARF standard (v5 5.1) says this:
#
# A base type is represented by a debugging information entry with
# the tag DW_TAG_base_type.
#
# A base type entry may have a DW_AT_name attribute whose value is
# a null-terminated string containing the name of the base type as
# recognized by the programming language of the compilation unit
# containing the base type entry.
#
# So the DW_AT_name field for a DW_TAG_base_type is optional. This
# test provides some basic checking that GDB doesn't crash when
# presented with this situation.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
standard_testfile void-type.c void-type.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 "GNU C 8.1"}
{DW_AT_language @DW_LANG_C}
{DW_AT_name $srcfile}
{DW_AT_comp_dir /tmp}
} {
declare_labels main_type int_type ptr_type
main_type: DW_TAG_base_type {
{DW_AT_byte_size 4 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
}
int_type: DW_TAG_base_type {
{DW_AT_byte_size 0 DW_FORM_sdata}
{DW_AT_encoding @DW_ATE_signed}
}
ptr_type: DW_TAG_pointer_type {
{DW_AT_type :$int_type}
}
DW_TAG_subprogram {
{MACRO_AT_func func}
{type :$int_type}
}
DW_TAG_subprogram {
{MACRO_AT_func main}
{type :$main_type}
}
DW_TAG_variable {
{DW_AT_name "var_a"}
{DW_AT_type :$main_type}
{DW_AT_external 1 DW_FORM_flag}
{DW_AT_location {DW_OP_addr [gdb_target_symbol "var_a"]} SPECIAL_expr}
}
DW_TAG_variable {
{DW_AT_name "var_ptr"}
{DW_AT_type :$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
}
# Use 'ptype' on two variables that are using DW_TAG_base_type types
# with missing DW_AT_name attributes.
gdb_test "ptype var_ptr" "type = <invalid type code $decimal> \\*" \
"ptype of a pointer to a basic type with missing name"
gdb_test "ptype var_a" "type = <invalid type code $decimal>" \
"ptype of a variable that is a basic type with a missing name"
|
