gdb/testsuite/gdb.dwarf2/corrupt.exp

   1 # Copyright 2014-2019 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 corrupt DWARF input
  17 # PR gdb/15827
  18
  19 load_lib dwarf.exp
  20
  21 if {![dwarf2_support]} {
  22     return 0
  23 }
  24
  25 standard_testfile corrupt.c corrupt.S
  26
  27 # Make the DWARF used for the test.
  28 #
  29 # Here we put DW_AT_sibling DIEs into the output which
  30 # point off into la-la land.  The whole purpose is to simulate
  31 # corrupt DWARF information and make sure that GDB can handle it
  32 # without crashing.
  33
  34 set asm_file [standard_output_file $srcfile2]
  35 Dwarf::assemble $asm_file {
  36     cu {} {
  37         compile_unit {} {
  38             declare_labels int_label
  39
  40             int_label: base_type {
  41                 {byte_size 4 sdata}
  42                 {name "int"}
  43             }
  44
  45             enumeration_type {
  46                 {name "ENUM"}
  47                 {byte_size 4 sdata}
  48             } {
  49                 enumerator {
  50                     {name "A"}
  51                     {const_value 0 sdata}
  52                 }
  53                 enumerator {
  54                     {name "B"}
  55                     {const_value 1 sdata}
  56                     {sibling 12345678 DW_FORM_ref4}
  57                 } {
  58                     base_type {
  59                         {byte_size 1 sdata}
  60                         {name "char"}
  61                     }
  62                 }
  63                 array_type {
  64                     {type :$int_label}
  65                     {sibling 12345678 DW_FORM_ref4}
  66                 }
  67             }
  68         }
  69     }
  70 }
  71
  72 if {[prepare_for_testing "failed to prepare" $testfile \
  73          [list $srcfile $asm_file] {nodebug}]} {
  74     return -1
  75 }
  76
  77 gdb_test "print 1" "= 1" "recover from corrupt DWARF"