gdb/testsuite/gdb.dwarf2/DW_OP_piece_with_DW_OP_GNU_uninit.exp

   1 # Copyright 2023-2024 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
  16 # Test use of DW_OP_GNU_uninit with DW_OP_piece.  For this case, GDB
  17 # should not print:
  18 #
  19 # DWARF-2 expression error: DW_OP_GNU_uninit must always be the very last op.
  20
  21 load_lib dwarf.exp
  22
  23 require dwarf2_support
  24
  25 standard_testfile main.c -dw.S
  26
  27 set asm_file [standard_output_file $srcfile2]
  28
  29 set c64 6639779683436459270
  30 set c32 1779823878
  31
  32 Dwarf::assemble $asm_file {
  33     cu {} {
  34         compile_unit {} {
  35             declare_labels i64_type i32_type
  36
  37             i64_type: base_type {
  38                 {name "int64_t"}
  39                 {encoding @DW_ATE_signed}
  40                 {byte_size 8 DW_FORM_sdata}
  41             }
  42
  43             i32_type: base_type {
  44                 {name "int32_t"}
  45                 {encoding @DW_ATE_signed}
  46                 {byte_size 4 DW_FORM_sdata}
  47             }
  48
  49             DW_TAG_variable {
  50                 {name i64_var}
  51                 {type :$i64_type}
  52                 {location {
  53                     DW_OP_constu $::c64
  54                     DW_OP_stack_value
  55                     DW_OP_GNU_uninit
  56                     DW_OP_piece 8
  57                 } SPECIAL_expr}
  58             }
  59
  60             DW_TAG_variable {
  61                 {name i32_var}
  62                 {type :$i32_type}
  63                 {location {
  64                     DW_OP_constu $::c32
  65                     DW_OP_stack_value
  66                     DW_OP_GNU_uninit
  67                     DW_OP_piece 4
  68                 } SPECIAL_expr}
  69             }
  70         }
  71     }
  72 }
  73
  74 if {[build_executable ${testfile}.exp ${testfile} \
  75          [list $srcfile $asm_file] {nodebug}]} {
  76     return -1
  77 }
  78
  79 clean_restart ${testfile}
  80
  81 if {![runto_main]} {
  82     return -1
  83 }
  84
  85 set cmd "print i64_var"
  86 if { [is_64_target] } {
  87     gdb_test $cmd \
  88         " = +\\\[uninitialized\\\] $c64"
  89 } else {
  90     unsupported $cmd
  91 }
  92
  93 gdb_test "print i32_var" \
  94     " = +\\\[uninitialized\\\] $c32"