gdb/testsuite/gdb.base/ifelse.exp

   1 # Copyright 2006, 2007 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16
  17 # This test checks that the if .. else .. end construct works and may
  18 # contain empty bodies without crashing.
  19
  20 if $tracelevel then {
  21     strace $tracelevel
  22 }
  23
  24 gdb_exit
  25 gdb_start
  26
  27 # First test that the if command works with an empty body
  28 # Test with different conditions because the body is ignored
  29 # if it is not executed.
  30
  31 #    with true condition
  32 set message "if 1 with empty body"
  33 gdb_test_multiple "if 1\nend" $message {
  34     -re "$gdb_prompt $" {pass $message}
  35     eof {
  36         fail "$message (crashed)"
  37         gdb_exit
  38         gdb_start
  39     }
  40 }
  41
  42 #    with false condition
  43 set message "if 0 with empty body"
  44 gdb_test_multiple "if 0\nend" $message {
  45     -re "$gdb_prompt $" {pass $message}
  46     eof {
  47         fail "$message (crashed)"
  48         gdb_exit
  49         gdb_start
  50     }
  51 }
  52
  53 # Second, do the same tests with an empty else body.
  54 # This fails in GDB <=6.5
  55
  56 # Unfortunately it was an uninitialised memory problem so
  57 # sometimes it just works. Preceed it with an if else end with
  58 # bodies and hopefully the memory with be dirty and the problem
  59 # will show itself (this works at time of writing).
  60
  61 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  62
  63 #    with true condition
  64 set message "if 1 .. else with empty body"
  65 gdb_test_multiple "if 1\nelse\nend" $message {
  66     -re "$gdb_prompt $" {pass $message}
  67     eof {
  68         fail "$message (crashed)"
  69         gdb_exit
  70         gdb_start
  71     }
  72 }
  73
  74 # dirty memory
  75 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  76
  77 #    with false condition
  78 set message "if 0 .. else with empty body"
  79 gdb_test_multiple "if 0\nelse\nend" $message {
  80     -re "$gdb_prompt $" {pass $message}
  81     eof {
  82         fail "$message (crashed)"
  83         gdb_exit
  84         gdb_start
  85     }
  86 }
  87
  88 gdb_test "set confirm off" "" ""
  89
  90 # Test that a define with an empty else can be replaced.
  91 # If there is memory corruption then free will fail.
  92 # dirty memory
  93 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  94 # create
  95 gdb_test "define abc\nif 1\nelse\nend\nend" "" "create define with empty else"
  96 # call (note that condition is 1 so should pass)
  97 gdb_test "abc" "" "call original define"
  98 # replace
  99 set message "replace define with if .. else with empty body"
 100 gdb_test_multiple "define abc\necho got here\\n\nend" $message {
 101     -re "$gdb_prompt $" {pass $message}
 102     eof {fail "$message (crashed)"}
 103 }
 104 # call
 105 gdb_test "abc" "got here" "call replacement define"