# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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

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

    gdb_run_cmd
    expect {
	-re "Break.*break1 \\(\\) at .*$srcfile:$decimal.*$prompt $" {
	    pass "running to break1"
	}
	timeout { fail "running to break1"; return }
    }
	
    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.*"] {
	return 
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #1"] {
	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.*" "bitfield uniqueness (s1)"] {
	return 
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #2"] {
	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.*" "bitfield uniqueness (u1)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #3"] {
	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.*" "bitfield uniqueness (s2)"] {
	return 
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #4"] {
	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.*" "bitfield uniqueness (u2)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #5"] {
	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.*" "bitfield uniqueness (s3)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #6"] {
	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.*" "bitfield uniqueness (u3)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #7"] {
	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.*" "bitfield uniqueness (s9)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #8"] {
	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.*" "bitfield uniqueness (u9)"] {
	return
    }
    if [gdb_test "cont" "Break.*break1 \\(\\) at .*$srcfile:$decimal.*" "continuing to break1 #9"] {
	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.*" "bitfield uniqueness (sc)"] {
	return
    }
}


#
# 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

    delete_breakpoints

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

    gdb_run_cmd
    expect {
	-re "Break.*break2 \\(\\) at .*$srcfile:$decimal.*$prompt $" {
	    pass "running to break2"
	}
	timeout { fail "running to break2"; return }
    }

    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}" "bitfield containment #1"] {
	return
    }

    if [gdb_test "cont" "Break.*break2 \\(\\) at .*$srcfile:$decimal.*" "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}" "bitfield containment #2"] {
	return
    }
}

# Test unsigned bitfields for unsignedness and range.
# Fill the unsigned fields with the maximum positive value and verify that
# the values are printed correctly.

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

    delete_breakpoints

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

    gdb_run_cmd
    expect {
	-re "Break.*break3 \\(\\) at .*$srcfile:$decimal.*$prompt $" {
	    pass "running to break3"
	}
	timeout { fail "running to break3"; return }
    }

    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.*" "unsigned bitfield ranges"] {
	return
    }
}

#
# 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

    delete_breakpoints

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

    gdb_run_cmd
    expect {
	-re "Break.*break4 \\(\\) at .*$srcfile:$decimal.*$prompt $" {
	    pass "running to break4"
	}
	timeout { fail "running to break4"; return }
    }

    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 .*}" "signed bitfields, max positive values"] {
	return
    }

    if [gdb_test "cont" "Break.*break4 \\(\\) at .*$srcfile:$decimal.*" "continuing to break4 #1"] {
	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 $" {
	    pass "determining signed-ness of bitfields"
	}
	-re ".* = 256.*$prompt $" {
	    pass "determining signed-ness of bitfields"
	    setup_xfail "*-*-*"
	}
	-re ".*$prompt $" {
	    fail "determining signed-ness of bitfields"
	    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.*" "signed bitfields, max negative values"] {
        return
    }

    if [gdb_test "cont" "Break.*break4 \\(\\) at .*$srcfile:$decimal.*" "continuing to break4 #2"] {
	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.*" "signed bitfields with -1"] {
	return
    }
}

# 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
