# Copyright 2004 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@gnu.org

# This file is part of the gdb testsuite.

if $tracelevel {
    strace $tracelevel
}

# Testcase for backtrace/gdb1476.

set prms_id 0
set bug_id 0

set testfile "gdb1476"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
    gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
}

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.

send_gdb "x 0\n"
gdb_expect {
    -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
    }
}

gdb_test "continue" "Program received signal SIGSEGV.*" \
	"continue to null pointer call"

gdb_test "backtrace 10" \
	"#0\[ \t\]*0x0* in .*\r\n#1\[ \t\]*$hex in x.*\r\n#2\[ \t\]*$hex in main.*" \
	"backtrace from null pointer call"