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

   1 # Copyright 2014-2023 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 # Tests side-effects of sizeof evaluation.
  17 # Based on gcc/testsuite/gcc.dg/vla-4.c; vla-15.c
  18
  19 standard_testfile
  20
  21 if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile}] } {
  22     return -1
  23 }
  24
  25 if ![runto_main] {
  26     return -1
  27 }
  28
  29 gdb_breakpoint [gdb_get_line_number "vla-filled"]
  30 gdb_continue_to_breakpoint "vla-filled"
  31
  32 # Check side effects for sizeof argument.
  33 set sizeof_int [get_sizeof "int" 4]
  34 set sizeof_vla [ expr "10" * "$sizeof_int" ]
  35
  36 gdb_test "print sizeof (vla1\[i++\])" " = ${sizeof_int}"
  37 gdb_test "print i" " = 0" \
  38          "print i - sizeof no side effects"
  39
  40 gdb_test "print sizeof (++vla1\[0\])" " = ${sizeof_int}"
  41 gdb_test "print vla1\[0\]" " = 10" \
  42          "print vla1\[0\] - sizeof no side effects"
  43
  44 gdb_test "ptype ++vla1\[0\]" "type = int"
  45 gdb_test "print vla1\[0\]" " = 10" \
  46          "print vla1\[0\] - ptype no side effects"
  47
  48 gdb_test "whatis ++vla1\[0\]" "type = int"
  49 gdb_test "print vla1\[0\]" " = 10" \
  50          "print vla1\[0\] - whatis no side effects"
  51
  52
  53 gdb_test "print sizeof (vla2\[i++\])" " = ${sizeof_vla}"
  54 gdb_test "print i" " = 1" \
  55          "print i - sizeof with side effects (1)"
  56
  57 gdb_test "print sizeof (vla2\[i++ + sizeof(j++)\])" " = ${sizeof_vla}"
  58 gdb_test "print i" " = 2" \
  59          "print i - sizeof with side effects (2)"
  60 gdb_test "print j" " = 0" \
  61          "print j - sizeof with no side effects"
  62
  63 gdb_test "ptype vla2\[i++\]" "type = int \\\[10\\\]"
  64 gdb_test "print i" " = 2" \
  65          "print i - ptype with side effects (1)"
  66
  67 gdb_test "ptype vla2\[i++ + sizeof(j++)\]" "type = int \\\[10\\\]"
  68 gdb_test "print i" " = 2" \
  69          "print i - ptype with side effects (2)"
  70 gdb_test "print j" " = 0" \
  71          "print j - ptype with no side effects"
  72
  73 gdb_test "whatis vla2\[i++\]" "type = int \\\[10\\\]"
  74 gdb_test "print i" " = 2" \
  75          "print i - whatis with side effects (1)"
  76
  77 gdb_test "whatis vla2\[i++ + sizeof(j++)\]" "type = int \\\[10\\\]"
  78 gdb_test "print i" " = 2" \
  79          "print i - whatis with side effects (2)"
  80 gdb_test "print j" " = 0" \
  81          "print j - whatis with no side effects"