1# This testcase is part of GDB, the GNU debugger.
2
3# Copyright 2011-2013 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
18set testfile "signest"
19set srcfile ${testfile}.c
20
21if [target_info exists gdb,nosignals] {
22    verbose "Skipping ${testfile}.exp because of nosignals."
23    return -1
24}
25
26if [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} {debug}] {
27    untested ${testfile}.exp
28    return -1
29}
30
31if ![runto_main] then {
32    untested ${testfile}.exp
33    return -1
34}
35
36# If we can examine what's at memory address 0, it is possible that we
37# could also execute it.  This could probably make us run away,
38# executing random code, which could have all sorts of ill effects,
39# especially on targets without an MMU.  Don't run the tests in that
40# case.
41
42gdb_test_multiple "x 0" "memory at address 0" {
43    -re "0x0:.*Cannot access memory at address 0x0.*$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).
52gdb_test "continue" \
53	 ".*Program received signal (SIGBUS|SIGSEGV).*bowler.*" \
54         "continue to fault"
55
56# Insert conditional breakpoint at faulting instruction
57gdb_test "break if 0" ".*" "set conditional breakpoint"
58
59# Set SIGSEGV/SIGBUS to pass+nostop
60gdb_test "handle SIGSEGV nostop print pass" ".*" "pass SIGSEGV"
61gdb_test "handle SIGBUS nostop print pass" ".*" "pass SIGBUS"
62
63# Step off the faulting instruction into the handler, triggering nested faults
64gdb_test "continue" \
65         ".*Program received signal (SIGBUS|SIGSEGV).*Program received signal (SIGBUS|SIGSEGV).*exited normally.*" \
66	 "run through nested faults"
67
68