1# This testcase is part of GDB, the GNU debugger. 2 3# Copyright 2011-2017 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 18standard_testfile 19 20if [target_info exists gdb,nosignals] { 21 verbose "Skipping ${testfile}.exp because of nosignals." 22 return -1 23} 24 25if [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} {debug}] { 26 return -1 27} 28 29if ![runto_main] then { 30 untested "could not run to main" 31 return -1 32} 33 34# If we can examine what's at memory address 0, it is possible that we 35# could also execute it. This could probably make us run away, 36# executing random code, which could have all sorts of ill effects, 37# especially on targets without an MMU. Don't run the tests in that 38# case. 39 40if { [is_address_zero_readable] } { 41 untested "memory at address 0 is possibly executable" 42 return -1 43} 44 45# Run until we hit the SIGSEGV (or SIGBUS on some platforms). 46gdb_test "continue" \ 47 ".*Program received signal (SIGBUS|SIGSEGV).*bowler.*" \ 48 "continue to fault" 49 50# Insert conditional breakpoint at faulting instruction 51gdb_test "break if 0" ".*" "set conditional breakpoint" 52 53# Set SIGSEGV/SIGBUS to pass+nostop 54gdb_test "handle SIGSEGV nostop print pass" ".*" "pass SIGSEGV" 55gdb_test "handle SIGBUS nostop print pass" ".*" "pass SIGBUS" 56 57# Step off the faulting instruction into the handler, triggering nested faults 58gdb_test "continue" \ 59 ".*Program received signal (SIGBUS|SIGSEGV).*Program received signal (SIGBUS|SIGSEGV).*exited normally.*" \ 60 "run through nested faults" 61 62