gdb/testsuite/gdb.dwarf2/bitfield-parent-optimized-out.exp

   1 # Copyright 2016-2020 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 # Test printing a bitfield of an optimized-out variable.  Regression
  17 # test for PR gdb/20295.
  18
  19 load_lib dwarf.exp
  20
  21 # This test can only be run on targets which support DWARF-2 and use gas.
  22 if {![dwarf2_support]} {
  23     return 0
  24 }
  25
  26 standard_testfile main.c .S
  27 set executable ${testfile}
  28
  29 # Make some DWARF for the test.
  30 set asm_file [standard_output_file $srcfile2]
  31 Dwarf::assemble $asm_file {
  32     global srcdir subdir srcfile
  33
  34     cu { version 3 addr_size 4 } {
  35         compile_unit {} {
  36             declare_labels struct_label var_label int_label
  37
  38             int_label: base_type {
  39                 {byte_size 4 sdata}
  40                 {encoding @DW_ATE_signed}
  41                 {name int}
  42             }
  43
  44             struct_label: structure_type {
  45                 {name S}
  46                 {byte_size 8 DW_FORM_sdata}
  47             } {
  48                 member {
  49                     {name bitfield}
  50                     {type :$int_label}
  51                     {bit_size 12 DW_FORM_sdata}
  52                     {bit_offset 20 DW_FORM_sdata}
  53                 }
  54                 member {
  55                     {name intfield}
  56                     {type :$int_label}
  57                     {data_member_location 4 DW_FORM_sdata}
  58                 }
  59             }
  60
  61             subprogram {
  62                 {MACRO_AT_func { main ${srcdir}/${subdir}/${srcfile} }}
  63                 {type :$int_label}
  64                 {external 1 flag}
  65             } {
  66                 var_label: DW_TAG_variable {
  67                     {name var}
  68                     {location {} DW_FORM_block1}
  69                     {type :$struct_label}
  70                 }
  71             }
  72         }
  73     }
  74 }
  75
  76 if [prepare_for_testing "failed to prepare" $executable "${asm_file} ${srcfile}" {}] {
  77     return -1
  78 }
  79
  80 if ![runto_main] {
  81     return -1
  82 }
  83
  84 gdb_test "p var" " = <optimized out>"
  85 gdb_test "p var.bitfield" " = <optimized out>"
  86 gdb_test "p var.intfield" " = <optimized out>"