gdb/testsuite/gdb.base/ifelse.exp

   1 # Copyright 2006, 2007, 2008, 2009 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 # This test checks that the if .. else .. end construct works and may
  17 # contain empty bodies without crashing.
  18
  19 if $tracelevel then {
  20     strace $tracelevel
  21 }
  22
  23 gdb_exit
  24 gdb_start
  25
  26 # First test that the if command works with an empty body
  27 # Test with different conditions because the body is ignored
  28 # if it is not executed.
  29
  30 #    with true condition
  31 set message "if 1 with empty body"
  32 gdb_test_multiple "if 1\nend" $message {
  33     -re "$gdb_prompt $" {pass $message}
  34     eof {
  35         fail "$message (crashed)"
  36         gdb_exit
  37         gdb_start
  38     }
  39 }
  40
  41 #    with false condition
  42 set message "if 0 with empty body"
  43 gdb_test_multiple "if 0\nend" $message {
  44     -re "$gdb_prompt $" {pass $message}
  45     eof {
  46         fail "$message (crashed)"
  47         gdb_exit
  48         gdb_start
  49     }
  50 }
  51
  52 # Second, do the same tests with an empty else body.
  53 # This fails in GDB <=6.5
  54
  55 # Unfortunately it was an uninitialised memory problem so
  56 # sometimes it just works. Preceed it with an if else end with
  57 # bodies and hopefully the memory with be dirty and the problem
  58 # will show itself (this works at time of writing).
  59
  60 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  61
  62 #    with true condition
  63 set message "if 1 .. else with empty body"
  64 gdb_test_multiple "if 1\nelse\nend" $message {
  65     -re "$gdb_prompt $" {pass $message}
  66     eof {
  67         fail "$message (crashed)"
  68         gdb_exit
  69         gdb_start
  70     }
  71 }
  72
  73 # dirty memory
  74 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  75
  76 #    with false condition
  77 set message "if 0 .. else with empty body"
  78 gdb_test_multiple "if 0\nelse\nend" $message {
  79     -re "$gdb_prompt $" {pass $message}
  80     eof {
  81         fail "$message (crashed)"
  82         gdb_exit
  83         gdb_start
  84     }
  85 }
  86
  87 gdb_test "set confirm off" "" ""
  88
  89 # Test that a define with an empty else can be replaced.
  90 # If there is memory corruption then free will fail.
  91 # dirty memory
  92 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" ""
  93 # create
  94 gdb_test "define abc\nif 1\nelse\nend\nend" "" "create define with empty else"
  95 # call (note that condition is 1 so should pass)
  96 gdb_test "abc" "" "call original define"
  97 # replace
  98 set message "replace define with if .. else with empty body"
  99 gdb_test_multiple "define abc\necho got here\\n\nend" $message {
 100     -re "$gdb_prompt $" {pass $message}
 101     eof {fail "$message (crashed)"}
 102 }
 103 # call
 104 gdb_test "abc" "got here" "call replacement define"