gdb/testsuite/gdb.base/ifelse.exp

   1 # Copyright 2006, 2007, 2008, 2009, 2010, 2011 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. Precede 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          "if true else false #1"
  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          "if true else false #2"
  77
  78 #    with false condition
  79 set message "if 0 .. else with empty body"
  80 gdb_test_multiple "if 0\nelse\nend" $message {
  81     -re "$gdb_prompt $" {pass $message}
  82     eof {
  83         fail "$message (crashed)"
  84         gdb_exit
  85         gdb_start
  86     }
  87 }
  88
  89 gdb_test_no_output "set confirm off" ""
  90
  91 # Test that a define with an empty else can be replaced.
  92 # If there is memory corruption then free will fail.
  93 # dirty memory
  94 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" \
  95          "if true else false #3"
  96 # create
  97 gdb_test "define abc\nif 1\nelse\nend\nend" "" "create define with empty else"
  98 # call (note that condition is 1 so should pass)
  99 gdb_test_no_output "abc" "call original define"
 100 # replace
 101 set message "replace define with if .. else with empty body"
 102 gdb_test_multiple "define abc\necho got here\\n\nend" $message {
 103     -re "$gdb_prompt $" {pass $message}
 104     eof {fail "$message (crashed)"}
 105 }
 106 # call
 107 gdb_test "abc" "got here" "call replacement define"