gdb/testsuite/gdb.base/randomize.exp

   1 # Copyright 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 set testfile randomize
  17 set srcfile ${testfile}.c
  18 set binfile ${objdir}/${subdir}/${testfile}
  19 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  20     untested "Couldn't compile test program"
  21     return -1
  22 }
  23
  24 # Get things started.
  25
  26 gdb_exit
  27 gdb_start
  28 gdb_reinitialize_dir $srcdir/$subdir
  29 gdb_load ${binfile}
  30
  31 proc address_get { testname } {
  32     global gdb_prompt
  33
  34     if {![runto_main]} {
  35         return -1
  36     }
  37
  38     # Do not rely on printf; some test configurations don't work with stdio.
  39
  40     gdb_breakpoint [gdb_get_line_number "print p"]
  41     gdb_continue_to_breakpoint "$testname - address set"
  42
  43     gdb_test_multiple "print/x p" $testname {
  44         -re "\\$\[0-9\]+ = (0x\[0-9a-f\]*)\r?\n$gdb_prompt $" {
  45             pass $testname
  46             return $expect_out(1,string)
  47         }
  48     }
  49 }
  50
  51 set test "set disable-randomization off"
  52 gdb_test_multiple "${test}" "${test}" {
  53     -re "Disabling randomization .* unsupported .*$gdb_prompt $" {
  54         untested "Disabling randomization is not supported on this Linux GDB"
  55         return -1
  56     }
  57     -re "No symbol .* in current context.*$gdb_prompt $" {
  58         untested "Disabling randomization is not supported on this GDB platform"
  59         return -1
  60     }
  61     -re "$gdb_prompt $" {
  62         pass $test
  63     }
  64 }
  65 gdb_test "show disable-randomization"         \
  66          "Disabling randomization .* is off." \
  67          "show disable-randomization off"
  68
  69 set addr1 [address_get "randomized first address"]
  70 set addr2 [address_get "randomized second address"]
  71 set test "randomized addresses should not match"
  72 if [string equal $addr1 $addr2] {
  73     untested "No randomization detected on this system"
  74     return -1
  75 } else {
  76     pass $test
  77 }
  78
  79 gdb_test_no_output "set disable-randomization on"
  80 gdb_test "show disable-randomization"         \
  81          "Disabling randomization .* is on." \
  82          "show disable-randomization on"
  83
  84 set addr1 [address_get "fixed first address"]
  85 set addr2 [address_get "fixed second address"]
  86 set test "fixed addresses should match"
  87 if [string equal $addr1 $addr2] {
  88     pass $test
  89 } else {
  90     fail $test
  91 }