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