gdb/testsuite/gdb.dwarf2/ada-valprint-error.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 load_lib dwarf.exp
  16
  17 # This test can only be run on targets which support DWARF-2 and use gas.
  18 if {![dwarf2_support]} {
  19     return 0
  20 }
  21
  22 standard_testfile .c -dw.S
  23
  24 # We need to know the size of integer and address types in order
  25 # to write some of the debugging info we'd like to generate.
  26 #
  27 # For that, we ask GDB by debugging our ada-valprint-error.c program.
  28 # Any program would do, but since we already have ada-valprint-error.c
  29 # specifically for this testcase, might as well use that.
  30
  31 if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
  32     untested "failed to compile"
  33     return -1
  34 }
  35
  36 # Make some DWARF for the test.
  37 set asm_file [standard_output_file $srcfile2]
  38 Dwarf::assemble $asm_file {
  39     cu {} {
  40         DW_TAG_compile_unit {
  41                 {DW_AT_language @DW_LANG_Ada95}
  42                 {DW_AT_name     fd.adb}
  43                 {DW_AT_comp_dir /tmp}
  44         } {
  45             declare_labels array_elt_label integer_label array_label \
  46                 typedef_label ref_type_label
  47             set ptr_size [get_sizeof "void *" 96]
  48             set int_size [get_sizeof "int" 4]
  49
  50             # A structure with no size attribute, to mimick structures
  51             # in Ada that have a dynamic size...
  52             array_elt_label: structure_type {
  53                 {name fd__Tints_doubledC}
  54                 {artificial 1 DW_FORM_flag_present}
  55             }
  56
  57             # ... and a corresponding XVZ variable, supposed to be there
  58             # to provide the actual size.  Except that, in this case,
  59             # the variable has no address, to simulate the fact that
  60             # it has been optimized out (which the compiler can do,
  61             # even if it at the expense of debuggability).
  62             DW_TAG_variable {
  63                 {name fd__Tints_doubledC___XVZ}
  64                 {DW_AT_type :$integer_label}
  65                 {artificial 1 DW_FORM_flag_present}
  66             }
  67
  68             integer_label: DW_TAG_base_type {
  69                 {DW_AT_byte_size $int_size DW_FORM_sdata}
  70                 {DW_AT_encoding  @DW_ATE_signed}
  71                 {DW_AT_name      integer}
  72             }
  73
  74             array_label: DW_TAG_array_type {
  75                 {DW_AT_name fd__ints_doubled}
  76                 {DW_AT_type :$array_elt_label}
  77             } {
  78                 DW_TAG_subrange_type {
  79                     {DW_AT_type        :$integer_label}
  80                     {DW_AT_upper_bound 2 DW_FORM_data1}
  81                 }
  82             }
  83
  84             typedef_label: DW_TAG_typedef {
  85                 {DW_AT_name fd__ints_doubled}
  86                 {DW_AT_type :$array_label}
  87             }
  88
  89             ref_type_label: DW_TAG_reference_type {
  90                 {DW_AT_byte_size $ptr_size DW_FORM_sdata}
  91                 {DW_AT_type :$typedef_label}
  92             }
  93
  94             DW_TAG_variable {
  95                 {name fd__global}
  96                 {DW_AT_type :$ref_type_label}
  97                 {DW_AT_location {
  98                     DW_OP_addr [gdb_target_symbol fd__global]
  99                 } SPECIAL_expr}
 100                 {external 1 flag}
 101             }
 102
 103         }
 104     }
 105 }
 106
 107 if { [prepare_for_testing ${testfile}.exp ${testfile} \
 108           [list $srcfile $asm_file] {nodebug}] } {
 109     return -1
 110 }
 111
 112 gdb_test_no_output "set language ada"
 113
 114 gdb_test "print fd.global" \
 115          " = <error reading variable: unable to read value of fd__Tints_doubledC___XVZ \\(value has been optimized out\\)>"