gdb/testsuite/gdb.dwarf2/dw2-regno-invalid.exp

   1 # Copyright 2015-2021 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 # Test GDB does not internal error on DWARF register number -1 which is invalid
  18 # in DWARF.  clang-3.5.0-9.fc22.x86_64 produced it inside DW_AT_location.
  19
  20 # This test can only be run on targets which support DWARF-2 and use gas.
  21 if {![dwarf2_support]} {
  22     return 0
  23 }
  24
  25 standard_testfile main.c .S
  26
  27 # Make some DWARF for the test.
  28 set asm_file [standard_output_file $srcfile2]
  29 Dwarf::assemble $asm_file {
  30     cu {} {
  31         compile_unit {
  32             {MACRO_AT_range {main}}
  33         } {
  34             declare_labels integer_label
  35
  36             integer_label: DW_TAG_base_type {
  37                 {DW_AT_byte_size 4 DW_FORM_sdata}
  38                 {DW_AT_encoding  @DW_ATE_signed}
  39                 {DW_AT_name      integer}
  40             }
  41
  42             DW_TAG_subprogram {
  43                 {DW_AT_external 1 flag}
  44                 {MACRO_AT_func {main}}
  45             } {
  46                 DW_TAG_variable {
  47                     {DW_AT_name bregx}
  48                         {DW_AT_type :$integer_label}
  49                         {DW_AT_external 1 flag}
  50                     {DW_AT_location {
  51                         DW_OP_bregx 0xffffffff 0
  52                     } SPECIAL_expr}
  53                 }
  54             }
  55         }
  56     }
  57 }
  58
  59 if { [prepare_for_testing "failed to prepare" ${testfile} \
  60                           [list $srcfile $asm_file] {nodebug}] } {
  61     return -1
  62 }
  63
  64 runto_main
  65
  66 # Variable 'bregx' needs to be inside main as for global symbols GDB does not
  67 # support non-trivial DW_AT_location.  Former GDB printed internal error here.
  68 gdb_test "p bregx"