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# This testcase is part of GDB, the GNU debugger.
# Copyright 2011-2012 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <>.
set testfile "signest"
set srcfile ${testfile}.c
if [target_info exists gdb,nosignals] {
verbose "Skipping ${testfile}.exp because of nosignals."
return -1
if [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug}] {
untested ${testfile}.exp
return -1
if ![runto_main] then {
untested ${testfile}.exp
return -1
# If we can examine what's at memory address 0, it is possible that we
# could also execute it. This could probably make us run away,
# executing random code, which could have all sorts of ill effects,
# especially on targets without an MMU. Don't run the tests in that
# case.
gdb_test_multiple "x 0" "memory at address 0" {
-re "0x0:.*Cannot access memory at address 0x0.*$gdb_prompt $" { }
-re "0x0:.*Error accessing memory address 0x0.*$gdb_prompt $" { }
-re ".*$gdb_prompt $" {
untested "Memory at address 0 is possibly executable"
return -1
# Run until we hit the SIGSEGV (or SIGBUS on some platforms).
gdb_test "continue" \
".*Program received signal (SIGBUS|SIGSEGV).*bowler.*" \
"continue to fault"
# Insert conditional breakpoint at faulting instruction
gdb_test "break if 0" ".*" "set conditional breakpoint"
# Set SIGSEGV/SIGBUS to pass+nostop
gdb_test "handle SIGSEGV nostop print pass" ".*" "pass SIGSEGV"
gdb_test "handle SIGBUS nostop print pass" ".*" "pass SIGBUS"
# Step off the faulting instruction into the handler, triggering nested faults
gdb_test "continue" \
".*Program received signal (SIGBUS|SIGSEGV).*Program received signal (SIGBUS|SIGSEGV).*exited normally.*" \
"run through nested faults"