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c90d28ac AB |
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 | # Check for an issue in GDB where buildsym_compunit::record_line was | |
17 | # removing duplicate line table entries, but skip_prologue_using_sal | |
18 | # depends on these duplicates to spot the end of the prologue. | |
19 | # | |
20 | # When the de-duplication was added this regression was not spotted as | |
21 | # it requires a particular combination of a (very) small function | |
22 | # being inlined into an also very small outer function. | |
23 | # | |
24 | # This test recreates the exact combination of line table entries that | |
25 | # were seen in the original test using the Dejagnu DWARF compiler. | |
26 | ||
27 | load_lib dwarf.exp | |
28 | ||
29 | # This test can only be run on targets which support DWARF-2 and use gas. | |
30 | if {![dwarf2_support]} { | |
31 | return 0 | |
32 | } | |
33 | ||
34 | # The .c files use __attribute__. | |
35 | if [get_compiler_info] { | |
36 | return -1 | |
37 | } | |
38 | if !$gcc_compiled { | |
39 | return 0 | |
40 | } | |
41 | ||
42 | standard_testfile dw2-inline-small-func-lbls.c dw2-inline-small-func.S \ | |
43 | dw2-inline-small-func.c dw2-inline-small-func.h | |
44 | ||
c90d28ac AB |
45 | set asm_file [standard_output_file $srcfile2] |
46 | Dwarf::assemble $asm_file { | |
47 | global srcdir subdir srcfile srcfile3 srcfile4 | |
48 | declare_labels lines_label callee_subprog_label | |
49 | ||
21b0982c | 50 | get_func_info main {debug optimize=-O1} |
c90d28ac AB |
51 | |
52 | cu {} { | |
53 | # It is important that the producer here be 'clang' as, at the | |
54 | # time of writing this, GCC for x86-64 doesn't make use of | |
55 | # skip_prologue_using_sal, while clang does. | |
56 | compile_unit { | |
57 | {producer "clang xxxx" } | |
58 | {language @DW_LANG_C} | |
59 | {name ${srcfile3}} | |
60 | {low_pc 0 addr} | |
61 | {stmt_list ${lines_label} DW_FORM_sec_offset} | |
62 | } { | |
63 | callee_subprog_label: subprogram { | |
64 | {external 1 flag} | |
65 | {name callee} | |
66 | {inline 3 data1} | |
67 | } | |
68 | subprogram { | |
69 | {external 1 flag} | |
70 | {name main} | |
71 | {low_pc $main_start addr} | |
72 | {high_pc "$main_start + $main_len" addr} | |
73 | } { | |
74 | inlined_subroutine { | |
75 | {abstract_origin %$callee_subprog_label} | |
76 | {low_pc line_label_1 addr} | |
77 | {high_pc line_label_2 addr} | |
78 | {call_file 1 data1} | |
79 | {call_line 21 data1} | |
80 | } | |
81 | } | |
82 | } | |
83 | } | |
84 | ||
85 | lines {version 2 default_is_stmt 1} lines_label { | |
86 | include_dir "${srcdir}/${subdir}" | |
87 | file_name "$srcfile3" 1 | |
88 | file_name "$srcfile4" 1 | |
89 | ||
90 | set f1_l1 [gdb_get_line_number "caller: before call" $srcfile3] | |
91 | set f1_l2 [gdb_get_line_number "caller: the call" $srcfile3] | |
92 | set f1_l3 [gdb_get_line_number "caller: after call" $srcfile3] | |
93 | ||
94 | set f2_l1 [gdb_get_line_number "callee: body" $srcfile4] | |
95 | ||
96 | program { | |
97 | {DW_LNE_set_address line_label_1} | |
98 | {DW_LNS_advance_line [expr $f1_l1 - 1]} | |
99 | {DW_LNS_copy} | |
100 | ||
101 | {DW_LNS_advance_line [expr ${f1_l2} - ${f1_l1}]} | |
102 | {DW_LNS_copy} | |
103 | ||
104 | {DW_LNS_set_file 2} | |
105 | {DW_LNS_advance_line [expr ${f2_l1} - ${f1_l2}]} | |
106 | {DW_LNS_copy} | |
107 | ||
108 | {DW_LNS_negate_stmt} | |
109 | {DW_LNS_copy} | |
110 | ||
111 | {DW_LNS_set_file 1} | |
112 | {DW_LNE_set_address line_label_2} | |
113 | {DW_LNS_advance_line [expr ${f1_l3} - ${f2_l1}]} | |
114 | {DW_LNS_copy} | |
115 | ||
116 | {DW_LNE_set_address line_label_3} | |
117 | {DW_LNS_copy} | |
118 | {DW_LNE_end_sequence} | |
119 | } | |
120 | } | |
121 | } | |
122 | ||
123 | if { [prepare_for_testing "failed to prepare" ${testfile} \ | |
124 | [list $srcfile $asm_file] {nodebug optimize=-O1}] } { | |
125 | return -1 | |
126 | } | |
127 | ||
128 | if ![runto_main] { | |
129 | return -1 | |
130 | } | |
131 | ||
132 | # Delete all breakpoints so that the output of "info breakpoints" | |
133 | # below will only contain a single breakpoint. | |
134 | delete_breakpoints | |
135 | ||
136 | # Place a breakpoint within the function in the header file. | |
137 | set linenum [gdb_get_line_number "callee: body" $srcfile4] | |
138 | gdb_breakpoint "${srcfile4}:${linenum}" | |
139 | ||
140 | # Check that the breakpoint was placed where we expected. It should | |
141 | # appear at the requested line. When the bug in GDB was present the | |
142 | # breakpoint would be placed on one of the following lines instead. | |
143 | gdb_test "info breakpoints" \ | |
144 | ".* in callee at \[^\r\n\]+${srcfile4}:${linenum}\\y.*" |