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
27load_lib dwarf.exp
28
29# This test can only be run on targets which support DWARF-2 and use gas.
30if {![dwarf2_support]} {
31    return 0
32}
33
34# The .c files use __attribute__.
35if [get_compiler_info] {
36    return -1
37}
38if !$gcc_compiled {
39    return 0
40}
41
42standard_testfile dw2-inline-small-func-lbls.c dw2-inline-small-func.S \
43    dw2-inline-small-func.c dw2-inline-small-func.h
44
45set asm_file [standard_output_file $srcfile2]
46Dwarf::assemble $asm_file {
47    global srcdir subdir srcfile srcfile3 srcfile4
48    declare_labels lines_label callee_subprog_label
49
50    get_func_info main {debug optimize=-O1}
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	    {line $f1_l1}
99	    {DW_LNS_copy}
100
101	    {line ${f1_l2}}
102	    {DW_LNS_copy}
103
104	    {DW_LNS_set_file 2}
105	    {line ${f2_l1}}
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	    {line ${f1_l3}}
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
123if { [prepare_for_testing "failed to prepare" ${testfile} \
124	  [list $srcfile $asm_file] {nodebug optimize=-O1}] } {
125    return -1
126}
127
128if ![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.
134delete_breakpoints
135
136# Place a breakpoint within the function in the header file.
137set linenum [gdb_get_line_number "callee: body" $srcfile4]
138gdb_breakpoint "${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.
143gdb_test "info breakpoints" \
144    ".* in callee at \[^\r\n\]+${srcfile4}:${linenum}\\y.*"
145