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# Copyright 2020 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/>.
# Check for an issue in GDB where buildsym_compunit::record_line was
# removing duplicate line table entries, but skip_prologue_using_sal
# depends on these duplicates to spot the end of the prologue.
#
# When the de-duplication was added this regression was not spotted as
# it requires a particular combination of a (very) small function
# being inlined into an also very small outer function.
#
# This test recreates the exact combination of line table entries that
# were seen in the original test using the Dejagnu DWARF compiler.
load_lib dwarf.exp
# This test can only be run on targets which support DWARF-2 and use gas.
if {![dwarf2_support]} {
return 0
}
# The .c files use __attribute__.
if [get_compiler_info] {
return -1
}
if !$gcc_compiled {
return 0
}
standard_testfile -lbls.c .S \
.c .h
set asm_file [standard_output_file $srcfile2]
Dwarf::assemble $asm_file {
global srcdir subdir srcfile srcfile3 srcfile4
declare_labels lines_label callee_subprog_label
get_func_info main {debug optimize=-O1}
cu {} {
# It is important that the producer here be 'clang' as, at the
# time of writing this, GCC for x86-64 doesn't make use of
# skip_prologue_using_sal, while clang does.
compile_unit {
{producer "clang xxxx" }
{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 line_label_1 addr}
{high_pc line_label_2 addr}
{call_file 1 data1}
{call_line 21 data1}
}
}
}
}
lines {version 2 default_is_stmt 1} lines_label {
include_dir "${srcdir}/${subdir}"
file_name "$srcfile3" 1
file_name "$srcfile4" 1
set f1_l1 [gdb_get_line_number "caller: before call" $srcfile3]
set f1_l2 [gdb_get_line_number "caller: the call" $srcfile3]
set f1_l3 [gdb_get_line_number "caller: after call" $srcfile3]
set f2_l1 [gdb_get_line_number "callee: body" $srcfile4]
program {
{DW_LNE_set_address line_label_1}
{line $f1_l1}
{DW_LNS_copy}
{line ${f1_l2}}
{DW_LNS_copy}
{DW_LNS_set_file 2}
{line ${f2_l1}}
{DW_LNS_copy}
{DW_LNS_negate_stmt}
{DW_LNS_copy}
{DW_LNS_set_file 1}
{DW_LNE_set_address line_label_2}
{line ${f1_l3}}
{DW_LNS_copy}
{DW_LNE_set_address line_label_3}
{DW_LNS_copy}
{DW_LNE_end_sequence}
}
}
}
if { [prepare_for_testing "failed to prepare" ${testfile} \
[list $srcfile $asm_file] {nodebug optimize=-O1}] } {
return -1
}
if ![runto_main] {
return -1
}
# Delete all breakpoints 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.
set linenum [gdb_get_line_number "callee: body" $srcfile4]
gdb_breakpoint "${srcfile4}:${linenum}"
# 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 callee at \[^\r\n\]+${srcfile4}:${linenum}\\y.*"
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