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- # Copyright 2020-2022 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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