gdb/testsuite/gdb.base/vla-ptr.exp

   1 # Copyright 2014-2021 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
  16 standard_testfile
  17 set using_clang [test_compiler_info clang*]
  18
  19 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
  20     return -1
  21 }
  22
  23 if ![runto_main] {
  24     return -1
  25 }
  26
  27 set sizeof_int [get_sizeof "int" 4]
  28
  29 # Check that VLA passed to function (pointer) points to the first element.
  30 gdb_breakpoint [gdb_get_line_number "foo_bp"]
  31 gdb_continue_to_breakpoint "foo_bp"
  32 gdb_test "print vla_ptr" "\\\(int \\\*\\\) $hex" "print vla_ptr (foo)"
  33 gdb_test "print *vla_ptr" " = 2" "print *vla_ptr (foo)"
  34
  35 gdb_breakpoint [gdb_get_line_number "bar_bp"]
  36 gdb_continue_to_breakpoint "bar_bp"
  37 gdb_test "print vla_ptr" "\\\(int \\\*\\\) $hex" "print vla_ptr (bar)"
  38 gdb_test "print *vla_ptr" " = 2" "print *vla_ptr (bar)"
  39
  40 gdb_breakpoint [gdb_get_line_number "vla_func_bp"]
  41 gdb_continue_to_breakpoint "vla_func_bp"
  42
  43 gdb_test_multiple "print td_vla" "" {
  44     -re -wrap " = \\\{4, 5, 6, 7, 8\\\}" {
  45         pass $gdb_test_name
  46     }
  47     -re -wrap " = $hex" {
  48         if { $using_clang } {
  49             # Clang 10.0.1 fails to generate complete type info, filed as
  50             # llvm PR48247 - "vla var with typedef'd type has incomplete
  51             # debug info".  See note below.
  52             xfail $gdb_test_name
  53             # Verify that despite the incomplete type info, the variable is
  54             # there and has the right value.
  55             gdb_test "p *td_vla@5" " = \\\{4, 5, 6, 7, 8\\\}"
  56         } else {
  57             fail $gdb_test_name
  58         }
  59     }
  60 }
  61
  62 # Clang 10.0.1 generates this DWARF for td_vla:
  63 #
  64 # A variable DIE:
  65 # <2><19f>: Abbrev Number: 6 (DW_TAG_variable)
  66 #    <1a0>   DW_AT_location    : 0x39 (location list)
  67 #    <1a4>   DW_AT_name        : td_vla
  68 #    <1aa>   DW_AT_type        : <0x1ae>
  69 # with type:
  70 # <2><1ae>: Abbrev Number: 7 (DW_TAG_typedef)
  71 #    <1af>   DW_AT_type        : <0x1fc>
  72 #    <1b3>   DW_AT_name        : typedef_vla
  73 # pointing to:
  74 # <1><1fc>: Abbrev Number: 11 (DW_TAG_array_type)
  75 #    <1fd>   DW_AT_type        : <0x1d3>
  76 # <2><201>: Abbrev Number: 14 (DW_TAG_subrange_type)
  77 #    <202>   DW_AT_type        : <0x1f5>
  78 #
  79 # The subrange type is missing the count attribute.