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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
# 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/>.
# Setup a line table where:
#
# | | | | | Inline | Inline |
# | Addr | File | Line | Stmt | Rng A | Rng B |
# |------|------|------|------|--------|--------|
# | 1 | 1 | 16 | Y | | |
# | 2 | 1 | 17 | Y | | |
# | 3 | 2 | 21 | Y | X | |
# | 4 | 2 | 22 | Y | X | |
# | 4 | 1 | 18 | N | X | |
# | 5 | 2 | 23 | N | X | X |
# | 6 | 1 | 24 | Y | | |
# | 7 | 1 | END | Y | | |
# |------|------|------|------|--------|--------|
#
# Places a brekpoint at file 2, line 22. Previously GDB would discard
# the line table entry for this line due to switching files for the
# file 1, line 18 non-statement line. After patching however, GDB now
# discards the file 1, line 18 entry instead, and the breakpoint at
# line 22 should succeed.
#
# The two inlined subroutine ranges 'A' and 'B' represent two possible
# ways that a compiler might represent this siuatio in the DWARF.
#
# Range 'B' is something that has been seen in the wild using GCC 8.2.
# In this case the compilers range information is clearly wrong, but
# this shouldn't impact the main point of the test.
#
# Range 'A' is a hypothetical case of how the compiler might choose to
# represent this range, this has never been seen in the wild, but is
# an improved debug experiece over range 'B'. However, if we ever run
# in to the situation where GDB can support the range 'A' test, or
# support some real DWARF seen in the wild, then the range 'A' case
# should be dropped in favour of supporting real world cases. This is
# included here as it "just worked" once the range 'B' case was
# working.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
require dwarf2_support
# The .c files use __attribute__.
require is_c_compiler_gcc
# Prepare and run the test.
proc do_test { start_label func_name tag } {
global srcfile srcfile2 srcfile3 srcfile4 testfile
standard_testfile dw2-inline-header-lbls.c dw2-inline-header-${tag}.S \
dw2-inline-header.c dw2-inline-header.h
set build_options {nodebug optimize=-O1}
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcdir subdir srcfile srcfile3 srcfile4 testfile
upvar build_options build_options
upvar start_label start_label
declare_labels lines_label callee_subprog_label
get_func_info main $build_options
cu {} {
compile_unit {
{producer "gcc" }
{language @DW_LANG_C}
{name ${srcfile3}}
{low_pc 0 addr}
{stmt_list ${lines_label} DW_FORM_sec_offset}
} {
callee_subprog_label: subprogram {
{external 1 flag}
{name callee}
{inline 3 data1}
}
subprogram {
{external 1 flag}
{name main}
{low_pc $main_start addr}
{high_pc "$main_start + $main_len" addr}
} {
inlined_subroutine {
{abstract_origin %$callee_subprog_label}
{low_pc $start_label addr}
{high_pc line_label_6 addr}
{call_file 1 data1}
{call_line 18 data1}
}
}
}
}
lines {version 2 default_is_stmt 1} lines_label {
include_dir "${srcdir}/${subdir}"
file_name "$srcfile3" 1
file_name "$srcfile4" 1
program {
DW_LNE_set_address line_label_1
DW_LNS_advance_line 15
DW_LNS_copy
DW_LNE_set_address line_label_2
DW_LNS_advance_line 1
DW_LNS_copy
DW_LNS_set_file 2
DW_LNE_set_address line_label_3
DW_LNS_advance_line 4
DW_LNS_copy
DW_LNE_set_address line_label_4
DW_LNS_advance_line 1
DW_LNS_copy
DW_LNS_advance_pc 0
DW_LNS_advance_line -4
DW_LNS_set_file 1
DW_LNS_negate_stmt
DW_LNS_copy
DW_LNS_set_file 2
DW_LNE_set_address line_label_5
DW_LNS_advance_line 5
DW_LNS_copy
DW_LNS_negate_stmt
DW_LNS_set_file 1
DW_LNE_set_address line_label_6
DW_LNS_advance_line 1
DW_LNS_copy
DW_LNE_set_address "$main_start + $main_len"
DW_LNE_end_sequence
}
}
}
if { [prepare_for_testing "failed to prepare" ${testfile}-${tag} \
[list $srcfile $asm_file] $build_options] } {
return -1
}
if ![runto_main] {
return -1
}
# Delete all breakpoints, watchpoints, tracepoints, and catchpoints so that
# the output of "info breakpoints" below will only contain a single breakpoint.
delete_breakpoints
# Place a breakpoint within the function in the header file.
gdb_breakpoint "${srcfile4}:22"
# Check that the breakpoint was placed where we expected. It should
# appear at the requested line. When the bug in GDB was present the
# breakpoint would be placed on one of the following lines instead.
gdb_test "info breakpoints" \
".* in $func_name at \[^\r\n\]+${srcfile4}:22\\y.*" \
"info breakpoints, $tag"
}
do_test line_label_3 "callee" "range-a"
do_test line_label_5 "main" "range-b"
|
