# Copyright (C) 1992, 1994 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu

# This file was written by Fred Fish. (fnf@cygnus.com)

if $tracelevel then {
	strace $tracelevel
}

set prms_id 0
set bug_id 0

set binfile "bitfields"
set srcfile $binfile.c

if ![file exists $objdir/$subdir/$binfile] then {
    perror "$objdir/$subdir/$binfile does not exist."
    return 0
}

#
# Test bitfield locating and uniqueness.
# For each member, set that member to 1 and verify that the member (and only
# that member) is 1, then reset it back to 0.
#

proc bitfield_uniqueness {} {
    global decimal
    global hex
    global prompt
    global srcfile
    global det_file

    if [gdb_test "break break1" "Break.* at $hex: file .*$srcfile, line $decimal" ""] {
	fail "setting breakpoint at break1"
	return
    }

    expect_after {
	-re "Starting.*Break.*break1 \[)(\]+ at .*$srcfile:$decimal.*$prompt $" {}
	timeout { fail "running to break1" ; return }
    }
    gdb_run_cmd 
    expect_after;

    if [gdb_test "print flags" ".*uc = 1 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (uc)"
	return 
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return 
    }
    # Note that we check for s1 as either 1 or -1, so that failure to
    # treat it correctly as a signed 1bit field (values 0 or -1) while
    # printing its value does not cause a spurious failure.  We do the
    # signedness preservation test later.
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = (1|-1), u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (s1)"
	return 
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return 
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 1, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (u1)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1" 
	return 
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 1, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (s2)" 
	return 
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 1, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (u2)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 1, u3 = 0, s9 = 0, u9 = 0, sc = 0" ""] {
	fail "bitfield uniqueness (s3)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 1, s9 = 0, u9 = 0, sc = 0" "" ] {
	fail "bitfield uniqueness (u3)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	timeout { fail "continuing to break1" ; return }
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 1, u9 = 0, sc = 0" "" ] {
	fail "bitfield uniqueness (s9)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 1, sc = 0" "" ] {
	fail "bitfield uniqueness (u9)"
	return
    }
    if [gdb_test "cont" "Break.*break1 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break1"
	return
    }
    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 0, u2 = 0, s3 = 0, u3 = 0, s9 = 0, u9 = 0, sc = 1" "" ] {
	fail "bitfield uniqueness (sc)"
	return
    }

    pass "bitfield locating and uniqueness"
}


#
# Test bitfield containment.
# Fill alternating fields with all 1's and verify that none of the bits
# "bleed over" to the other fields.
#

proc bitfield_containment {} {
    global decimal
    global hex
    global prompt
    global srcfile
    global det_file

    delete_breakpoints

    if [gdb_test "break break2" "Break.* at $hex: file .*$srcfile, line $decimal" ""] {
	fail "setting breakpoint at break2"
	return
    }

    expect_after {
	-re "Starting.*Break.*break2 \[)(\]+ at .*$srcfile:$decimal.*$prompt $" {}
	timeout { fail "running to break2" ; return }
    }
    gdb_run_cmd
    expect_after;

    if [gdb_test "print/x flags" ".*uc = 0xff, s1 = 0x0, u1 = 0x1, s2 = 0x0, u2 = 0x3, s3 = 0x0, u3 = 0x7, s9 = 0x0, u9 = 0x1ff, sc = 0x0" ""] {
	fail "bitfield containment"
	return
    }

    if [gdb_test "cont" "Break.*break2 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break2"
	return
    }

    # If program is compiled with Sun CC, then these print out as their
    # actual sizes; if compiled with gcc, they print out as 0xffffffff
    # (which strikes me as bogus, but accept it at least for now).
    if [gdb_test "print/x flags" ".*uc = 0x0, s1 = 0x(1|f*), u1 = 0x0, s2 = 0x(3|f*), u2 = 0x0, s3 = 0x(7|f*), u3 = 0x0, s9 = 0x(1ff|f*), u9 = 0x0, sc = 0xff" ""] {
	fail "bitfield containment"
	return
    }

    pass "bitfield containment"
}

#
# Test unsigned bitfields for unsignedness and range.
# Fill the unsigned fields with the maximum positive value and verify that
# the values are printed correctly.
# FIXME:  Perhaps we should test each bitfield separately so we can
# report individual failures rather than just pass/nopass.

proc bitfield_unsignedness {} {
    global decimal
    global hex
    global prompt
    global srcfile
    global det_file

    delete_breakpoints

    if [gdb_test "break break3" "Break.* at $hex: file .*$srcfile, line $decimal" ""] {
	fail "setting breakpoint at break3"
	return
    }

    expect_after {
	-re "Starting.*Break.*break3 \[)(\]+ at .*$srcfile:$decimal.*$prompt $" {}
	timeout { fail "running to break3" ; return }
    }
    gdb_run_cmd
    expect_after;

    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 1, s2 = 0, u2 = 3, s3 = 0, u3 = 7, s9 = 0, u9 = 511, sc = 0" "" ] {
	fail "unsigned bitfield ranges"
	return
    }

    pass "unsigned bitfield ranges and unsigned-ness"
}

#
# Test signed bitfields for signedness and range.
# Fill the signed fields with the maximum positive value, then the maximally
# negative value, then -1, and verify in each case that the values are
# printed correctly.
#

proc bitfield_signedness {} {
    global decimal
    global hex
    global prompt
    global srcfile
    global det_file

    delete_breakpoints

    if [gdb_test "break break4" "Break.* at $hex: file .*$srcfile, line $decimal" ""] {
	fail "setting breakpoint at break4"
	return
    }

    expect_after {
	-re "Starting.*Break.*break4 \[)(\]+ at .*$srcfile:$decimal.*$prompt $" {}
	timeout { fail "running to break4" ; return }
    }
    gdb_run_cmd
    expect_after;

    if [gdb_test "print flags" ".*uc = 0 .*, s1 = 0, u1 = 0, s2 = 1, u2 = 0, s3 = 3, u3 = 0, s9 = 255, u9 = 0, sc = 0" ""] {
	fail "signed bitfields, max positive values"
	return
    }

    if [gdb_test "cont" "Break.*break4 \[)(\]+ at .*$srcfile:$decimal" "" ] {
	fail "continuing to break4"
	return
    }

    # Determine if the target has signed bitfields so we can xfail the
    # the signed bitfield tests if it doesn't.
    send "print i\n"
    expect {
	-re ".* = -256.*$prompt $" {}
	-re ".* = 256.*$prompt $" {setup_xfail "*-*-*"}
	-re ".*$prompt $" { fail "determining signed-ness of bitfields (known bug in sparc gcc 2.4.5)"
	    return
	}
	default { fail "determining signed-ness of bitfields" ; return }
    }

    if [gdb_test "print flags" ".*uc = 0 .*, s1 = -1, u1 = 0, s2 = -2, u2 = 0, s3 = -4, u3 = 0, s9 = -256, u9 = 0, sc = 0" ""] {
        fail "signed bitfields, max negative values"
        return
    }

    if [gdb_test "cont" "Break.*break4 \[)(\]+ at .*$srcfile:$decimal" ""] {
	fail "continuing to break4"
	return
    }

    if [gdb_test "print flags" ".*uc = 0 .*, s1 = -1, u1 = 0, s2 = -1, u2 = 0, s3 = -1, u3 = 0, s9 = -1, u9 = 0, sc = 0" ""] {
	fail "signed bitfields with -1"
	return
    }

    pass "signed bitfield ranges and signed-ness"
}

# Start with a fresh gdb.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load $objdir/$subdir/$binfile

send "set print sevenbit-strings\n" ; expect -re "$prompt $"
bitfield_uniqueness
if [istarget "mips-idt-*"] then {
    # Restart because IDT/SIM runs out of file descriptors.
    gdb_exit
    gdb_start
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load $objdir/$subdir/$binfile
}
bitfield_containment
if [istarget "mips-idt-*"] then {
    # Restart because IDT/SIM runs out of file descriptors.
    gdb_exit
    gdb_start
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load $objdir/$subdir/$binfile
}
bitfield_unsignedness
if [istarget "mips-idt-*"] then {
    # Restart because IDT/SIM runs out of file descriptors.
    gdb_exit
    gdb_start
    gdb_reinitialize_dir $srcdir/$subdir
    gdb_load $objdir/$subdir/$binfile
}
bitfield_signedness