133 lines
4.5 KiB
Text
133 lines
4.5 KiB
Text
# This testcase is part of GDB, the GNU debugger.
|
|
|
|
# Copyright 2004, 2005, 2007, 2008, 2009, 2010, 2011
|
|
# 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
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# 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 <http://www.gnu.org/licenses/>.
|
|
|
|
# Check that GDB can trigger and backtrace SIGSEGV signal stacks
|
|
# caused by both accessing (data) and executing (code) at address
|
|
# zero.
|
|
|
|
# On function descriptor architectures, a zero descriptor, instead of
|
|
# a NULL pointer, is used. That way the NULL code test always
|
|
# contains a zero code reference.
|
|
|
|
# For recovery, sigjmp/longjmp are used.
|
|
|
|
# This also tests backtrace/gdb1476.
|
|
|
|
if [target_info exists gdb,nosignals] {
|
|
verbose "Skipping signull.exp because of nosignals."
|
|
continue
|
|
}
|
|
|
|
if $tracelevel {
|
|
strace $tracelevel
|
|
}
|
|
|
|
|
|
set testfile "signull"
|
|
set srcfile ${testfile}.c
|
|
set binfile ${objdir}/${subdir}/${testfile}
|
|
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
|
|
untested signull.exp
|
|
return -1
|
|
}
|
|
|
|
gdb_exit
|
|
gdb_start
|
|
gdb_reinitialize_dir $srcdir/$subdir
|
|
gdb_load ${binfile}
|
|
|
|
#
|
|
# Run to `main' where we begin our tests.
|
|
#
|
|
|
|
if ![runto_main] then {
|
|
gdb_suppress_tests
|
|
}
|
|
|
|
# If we can examine what's at memory address 0, it is possible that we
|
|
# could also execute it. This could probably make us run away,
|
|
# executing random code, which could have all sorts of ill effects,
|
|
# especially on targets without an MMU. Don't run the tests in that
|
|
# case.
|
|
|
|
gdb_test_multiple "x 0" "memory at address 0" {
|
|
-re "0x0:.*Cannot access memory at address 0x0.*$gdb_prompt $" { }
|
|
-re "0x0:.*Error accessing memory address 0x0.*$gdb_prompt $" { }
|
|
-re ".*$gdb_prompt $" {
|
|
untested "Memory at address 0 is possibly executable"
|
|
return
|
|
}
|
|
}
|
|
|
|
# If an attempt to call a NULL pointer leaves the inferior in main,
|
|
# then function pointers are descriptors, probe this and remember the
|
|
# result.
|
|
|
|
gdb_test_no_output "set test = code_entry_point" \
|
|
"set for function pointer probe"
|
|
set test "probe function pointer"
|
|
set function_pointer code_entry_point
|
|
set signame "SIGSEGV"
|
|
gdb_test_multiple "continue" "$test" {
|
|
-re "Program received signal SIGSEGV.*bowler .*$gdb_prompt $" {
|
|
set function_pointer code_descriptor
|
|
pass "$test (function descriptor)"
|
|
}
|
|
-re "Program received signal SIGSEGV.*0.*$gdb_prompt $" {
|
|
pass "$test (function entry-point)"
|
|
}
|
|
-re "Program received signal SIGBUS.*0.*$gdb_prompt $" {
|
|
set signame SIGBUS
|
|
pass "$test (function entry-point)"
|
|
}
|
|
}
|
|
|
|
# Re-start from scratch, breakpoint the bowler so that control is
|
|
# regained after each test, and run up to that.
|
|
rerun_to_main
|
|
gdb_test "break bowler"
|
|
gdb_test "break keeper"
|
|
# By default Stop:Yes Print:Yes Pass:Yes
|
|
gdb_test "handle SIGSEGV" "SIGSEGV.*Yes.*Yes.*Yes.*Segmentation fault"
|
|
gdb_test "handle SIGBUS" "SIGBUS.*Yes.*Yes.*Yes.*Bus error"
|
|
|
|
# For the given signal type, check that: the SIGSEGV occures; a
|
|
# backtrace from the SEGV works; the sigsegv is delivered; a backtrace
|
|
# through the SEGV works.
|
|
|
|
proc test_segv { name tag bt_from_segv bt_from_keeper } {
|
|
global signame
|
|
gdb_test continue "Breakpoint.* bowler.*" "${name}; start with the bowler"
|
|
# NB: Don't use $tag in the testname - changes across systems.
|
|
gdb_test_no_output "set test = $tag" "${name}; select the pointer type"
|
|
gdb_test continue "Program received signal ${signame}.*" \
|
|
"${name}; take the ${signame}"
|
|
gdb_test backtrace $bt_from_segv "${name}; backtrace from ${signame}"
|
|
gdb_test continue "Breakpoint.* keeper.*" "${name}; continue to the keeper"
|
|
gdb_test backtrace $bt_from_keeper "${name}; backtrace from keeper through ${signame}"
|
|
}
|
|
|
|
test_segv "data read" data_read \
|
|
{#0 .* bowler .*#1 .* main .*} \
|
|
{#0 .* keeper .*#1 .* handler .*#2 .* bowler .*#3 .* main .*}
|
|
test_segv "data write" data_write \
|
|
{#0 .* bowler .*#1 .* main .*} \
|
|
{#0 .* keeper .*#1 .* handler .*#2 .* bowler .*#3 .* main .*}
|
|
test_segv code $function_pointer \
|
|
{#0 .* 0x0+ .*#1 .* bowler .*#2 .* main .*} \
|
|
{#0 .* keeper .*#1 .* handler .*#2 .* 0x0+ .*#3 .* bowler .*#4 .* main .*}
|