gdb/testsuite/gdb.dwarf2/shortpiece.exp

   1 # Copyright 2017-2022 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 load_lib dwarf.exp
  17
  18 # This test can only be run on targets which support DWARF-2 and use gas.
  19 if {![dwarf2_support]} {
  20     return 0
  21 }
  22
  23 standard_testfile main.c -dw.S
  24
  25 # Make some DWARF for the test.
  26 set asm_file [standard_output_file $srcfile2]
  27 Dwarf::assemble $asm_file {
  28     global pair
  29
  30     cu { addr_size 4 } {
  31         compile_unit {} {
  32             declare_labels int_label ushort_label struct_label
  33
  34             int_label: DW_TAG_base_type {
  35                 {DW_AT_byte_size 4 DW_FORM_udata}
  36                 {DW_AT_encoding @DW_ATE_unsigned}
  37                 {DW_AT_name "myint"}
  38             }
  39             ushort_label: DW_TAG_base_type {
  40                 {DW_AT_byte_size 2 DW_FORM_udata}
  41                 {DW_AT_encoding @DW_ATE_unsigned}
  42                 {DW_AT_name "myushort"}
  43             }
  44
  45             struct_label: DW_TAG_structure_type {
  46                 {DW_AT_name "S"}
  47                 {DW_AT_byte_size 8 DW_FORM_udata}
  48             } {
  49                 DW_TAG_member {
  50                     {DW_AT_name "a"}
  51                     {DW_AT_type :${int_label}}
  52                     {DW_AT_data_member_location 0 DW_FORM_udata}
  53                 }
  54
  55                 DW_TAG_member {
  56                     {DW_AT_name "b"}
  57                     {DW_AT_type :${ushort_label}}
  58                     {DW_AT_data_member_location 4 DW_FORM_udata}
  59                 }
  60             }
  61
  62             DW_TAG_variable {
  63                 {DW_AT_name "s1"}
  64                 {DW_AT_type :${struct_label}}
  65                 {DW_AT_external 1 DW_FORM_flag}
  66                 {DW_AT_location {
  67                     DW_OP_constu 1
  68                     DW_OP_stack_value
  69                     DW_OP_piece 4
  70                     DW_OP_constu 0
  71                     DW_OP_stack_value
  72                     DW_OP_piece 2
  73                 } SPECIAL_expr}
  74             }
  75
  76             DW_TAG_variable {
  77                 {DW_AT_name "s2"}
  78                 {DW_AT_type :${struct_label}}
  79                 {DW_AT_external 1 DW_FORM_flag}
  80                 {DW_AT_location {
  81                     DW_OP_constu 1
  82                     DW_OP_stack_value
  83                     DW_OP_piece 4
  84                     DW_OP_constu 0
  85                     DW_OP_stack_value
  86                     DW_OP_piece 8
  87                 } SPECIAL_expr}
  88             }
  89         }
  90     }
  91 }
  92
  93 if { [prepare_for_testing "failed to prepare" ${testfile} \
  94                           [list $srcfile $asm_file] {nodebug}] } {
  95     return -1
  96 }
  97
  98 gdb_test "p s1" " = {a = 1, b = 0}"
  99 gdb_test "p s2" \
 100     "access outside bounds of object referenced via synthetic pointer"