gdb/testsuite/gdb.base/randomize.exp

   1 # Copyright 2008-2019 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 standard_testfile
  17
  18 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  19     return -1
  20 }
  21
  22 proc address_get { testname } {
  23     global gdb_prompt
  24
  25     if {![runto_main]} {
  26         return -1
  27     }
  28
  29     # Do not rely on printf; some test configurations don't work with stdio.
  30
  31     gdb_breakpoint [gdb_get_line_number "print p"]
  32     gdb_continue_to_breakpoint "$testname - address set"
  33
  34     gdb_test_multiple "print/x p" $testname {
  35         -re "\\$\[0-9\]+ = (0x\[0-9a-f\]*)\r?\n$gdb_prompt $" {
  36             pass $testname
  37             return $expect_out(1,string)
  38         }
  39     }
  40 }
  41
  42 set test "set disable-randomization off"
  43 gdb_test_multiple "${test}" "${test}" {
  44     -re "Disabling randomization .* unsupported .*$gdb_prompt $" {
  45         untested "disabling randomization is not supported on this Linux GDB"
  46         return -1
  47     }
  48     -re "No symbol .* in current context.*$gdb_prompt $" {
  49         untested "disabling randomization is not supported on this GDB platform"
  50         return -1
  51     }
  52     -re "$gdb_prompt $" {
  53         pass $test
  54     }
  55 }
  56 gdb_test "show disable-randomization"         \
  57          "Disabling randomization .* is off." \
  58          "show disable-randomization off"
  59
  60 set addr1 [address_get "randomized first address"]
  61 set addr2 [address_get "randomized second address"]
  62 set test "randomized addresses should not match"
  63 if [string equal $addr1 $addr2] {
  64     untested "no randomization detected on this system"
  65     return -1
  66 } else {
  67     pass $test
  68 }
  69
  70 gdb_test_no_output "set disable-randomization on"
  71 gdb_test "show disable-randomization"         \
  72          "Disabling randomization .* is on." \
  73          "show disable-randomization on"
  74
  75 set addr1 [address_get "fixed first address"]
  76 set addr2 [address_get "fixed second address"]
  77 set test "fixed addresses should match"
  78 if [string equal $addr1 $addr2] {
  79     pass $test
  80 } else {
  81     fail $test
  82 }