gdb/testsuite/gdb.base/ifelse.exp

   1 # Copyright 2006-2022 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 gdb_exit
  20 gdb_start
  21
  22 # First test that the if command works with an empty body
  23 # Test with different conditions because the body is ignored
  24 # if it is not executed.
  25
  26 #    with true condition
  27 set message "if 1 with empty body"
  28 gdb_test_multiple "if 1\nend" $message {
  29     -re "$gdb_prompt $" {pass $message}
  30     eof {
  31         fail "$message (crashed)"
  32         gdb_exit
  33         gdb_start
  34     }
  35 }
  36
  37 #    with false condition
  38 set message "if 0 with empty body"
  39 gdb_test_multiple "if 0\nend" $message {
  40     -re "$gdb_prompt $" {pass $message}
  41     eof {
  42         fail "$message (crashed)"
  43         gdb_exit
  44         gdb_start
  45     }
  46 }
  47
  48 # Second, do the same tests with an empty else body.
  49 # This fails in GDB <=6.5
  50
  51 # Unfortunately it was an uninitialised memory problem so
  52 # sometimes it just works. Precede it with an if else end with
  53 # bodies and hopefully the memory with be dirty and the problem
  54 # will show itself (this works at time of writing).
  55
  56 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" \
  57          "if true else false #1"
  58
  59 #    with true condition
  60 set message "if 1 .. else with empty body"
  61 gdb_test_multiple "if 1\nelse\nend" $message {
  62     -re "$gdb_prompt $" {pass $message}
  63     eof {
  64         fail "$message (crashed)"
  65         gdb_exit
  66         gdb_start
  67     }
  68 }
  69
  70 # dirty memory
  71 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" \
  72          "if true else false #2"
  73
  74 #    with false condition
  75 set message "if 0 .. else with empty body"
  76 gdb_test_multiple "if 0\nelse\nend" $message {
  77     -re "$gdb_prompt $" {pass $message}
  78     eof {
  79         fail "$message (crashed)"
  80         gdb_exit
  81         gdb_start
  82     }
  83 }
  84
  85 gdb_test_no_output "set confirm off" ""
  86
  87 # Test that a define with an empty else can be replaced.
  88 # If there is memory corruption then free will fail.
  89 # dirty memory
  90 gdb_test "if 1\necho true\\n\nelse\necho false\\n\nend" "true" \
  91          "if true else false #3"
  92 # create
  93 gdb_test "define abc\nif 1\nelse\nend\nend" "" "create define with empty else"
  94 # call (note that condition is 1 so should pass)
  95 gdb_test_no_output "abc" "call original define"
  96 # replace
  97 set message "replace define with if .. else with empty body"
  98 gdb_test_multiple "define abc\necho got here\\n\nend" $message {
  99     -re "$gdb_prompt $" {pass $message}
 100     eof {fail "$message (crashed)"}
 101 }
 102 # call
 103 gdb_test "abc" "got here" "call replacement define"