gdb/testsuite/gdb.base/signest.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2011 Free Software Foundation, Inc.
   4
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 set testfile "signest"
  19 set srcfile ${testfile}.c
  20
  21 if [target_info exists gdb,nosignals] {
  22     verbose "Skipping ${testfile}.exp because of nosignals."
  23     return -1
  24 }
  25
  26 if [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug}] {
  27     untested ${testfile}.exp
  28     return -1
  29 }
  30
  31 if ![runto_main] then {
  32     untested ${testfile}.exp
  33     return -1
  34 }
  35
  36 # If we can examine what's at memory address 0, it is possible that we
  37 # could also execute it.  This could probably make us run away,
  38 # executing random code, which could have all sorts of ill effects,
  39 # especially on targets without an MMU.  Don't run the tests in that
  40 # case.
  41
  42 gdb_test_multiple "x 0" "memory at address 0" {
  43     -re "0x0:.*Cannot access memory at address 0x0.*$gdb_prompt $" { }
  44     -re "0x0:.*Error accessing memory address 0x0.*$gdb_prompt $" { }
  45     -re ".*$gdb_prompt $" {
  46         untested "Memory at address 0 is possibly executable"
  47         return -1
  48     }
  49 }
  50
  51 # Run until we hit the SIGSEGV (or SIGBUS on some platforms).
  52 gdb_test "continue" \
  53          ".*Program received signal (SIGBUS|SIGSEGV).*bowler.*" \
  54          "continue to fault"
  55
  56 # Insert conditional breakpoint at faulting instruction
  57 gdb_test "break if 0" ".*" "set conditional breakpoint"
  58
  59 # Set SIGSEGV/SIGBUS to pass+nostop
  60 gdb_test "handle SIGSEGV nostop print pass" ".*" "pass SIGSEGV"
  61 gdb_test "handle SIGBUS nostop print pass" ".*" "pass SIGBUS"
  62
  63 # Step off the faulting instruction into the handler, triggering nested faults
  64 gdb_test "continue" \
  65          ".*Program received signal (SIGBUS|SIGSEGV).*Program received signal (SIGBUS|SIGSEGV).*exited normally.*" \
  66          "run through nested faults"
  67