gdb/testsuite/gdb.dwarf2/ada-valprint-error.exp

   1 # Copyright 2017-2024 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 require dwarf2_support
  19
  20 standard_testfile .c -dw.S
  21
  22 # We need to know the size of integer and address types in order
  23 # to write some of the debugging info we'd like to generate.
  24 #
  25 # For that, we ask GDB by debugging our ada-valprint-error.c program.
  26 # Any program would do, but since we already have ada-valprint-error.c
  27 # specifically for this testcase, might as well use that.
  28
  29 if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile}] } {
  30     untested "failed to compile"
  31     return -1
  32 }
  33
  34 # Make some DWARF for the test.
  35 set asm_file [standard_output_file $srcfile2]
  36 Dwarf::assemble $asm_file {
  37     cu {} {
  38         DW_TAG_compile_unit {
  39                 {DW_AT_language @DW_LANG_Ada95}
  40                 {DW_AT_name     fd.adb}
  41                 {DW_AT_comp_dir /tmp}
  42         } {
  43             declare_labels array_elt_label integer_label array_label \
  44                 typedef_label ref_type_label
  45             set ptr_size [get_sizeof "void *" 96]
  46             set int_size [get_sizeof "int" 4]
  47
  48             # A structure with no size attribute, to mimick structures
  49             # in Ada that have a dynamic size...
  50             array_elt_label: structure_type {
  51                 {name fd__Tints_doubledC}
  52                 {artificial 1 DW_FORM_flag_present}
  53             }
  54
  55             # ... and a corresponding XVZ variable, supposed to be there
  56             # to provide the actual size.  Except that, in this case,
  57             # the variable has no address, to simulate the fact that
  58             # it has been optimized out (which the compiler can do,
  59             # even if it at the expense of debuggability).
  60             DW_TAG_variable {
  61                 {name fd__Tints_doubledC___XVZ}
  62                 {DW_AT_type :$integer_label}
  63                 {artificial 1 DW_FORM_flag_present}
  64             }
  65
  66             integer_label: DW_TAG_base_type {
  67                 {DW_AT_byte_size $int_size DW_FORM_sdata}
  68                 {DW_AT_encoding  @DW_ATE_signed}
  69                 {DW_AT_name      integer}
  70             }
  71
  72             array_label: DW_TAG_array_type {
  73                 {DW_AT_name fd__ints_doubled}
  74                 {DW_AT_type :$array_elt_label}
  75             } {
  76                 DW_TAG_subrange_type {
  77                     {DW_AT_type        :$integer_label}
  78                     {DW_AT_upper_bound 2 DW_FORM_data1}
  79                 }
  80             }
  81
  82             typedef_label: DW_TAG_typedef {
  83                 {DW_AT_name fd__ints_doubled}
  84                 {DW_AT_type :$array_label}
  85             }
  86
  87             ref_type_label: DW_TAG_reference_type {
  88                 {DW_AT_byte_size $ptr_size DW_FORM_sdata}
  89                 {DW_AT_type :$typedef_label}
  90             }
  91
  92             DW_TAG_variable {
  93                 {name fd__global}
  94                 {DW_AT_type :$ref_type_label}
  95                 {DW_AT_location {
  96                     DW_OP_addr [gdb_target_symbol fd__global]
  97                 } SPECIAL_expr}
  98                 {external 1 flag}
  99             }
 100
 101         }
 102     }
 103 }
 104
 105 if { [prepare_for_testing ${testfile}.exp ${testfile} \
 106           [list $srcfile $asm_file] {nodebug}] } {
 107     return -1
 108 }
 109
 110 gdb_test_no_output "set language ada"
 111
 112 gdb_test "print fd.global" \
 113          " = <error reading variable: unable to read value of fd__Tints_doubledC___XVZ \\(value has been optimized out\\)>"