Subversion Repositories or1k

# Copyright (C) 1992, 1997 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 Jeff Law. (law@cs.utah.edu)

if $tracelevel then {

        strace $tracelevel

}

set prms_id 0

set bug_id 0

set testfile "return"

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."

}

proc return_tests { } {

    global gdb_prompt

    if { ! [ runto func1 ] } then { return 0 }

    send_gdb "return\n"

    gdb_expect {

        -re "Make .* return now.*y or n. $" {

            send_gdb "y\n"

            exp_continue

        }

        -re "func1 ..;.*$gdb_prompt $" {

            send_gdb "step\n"

            exp_continue

        }

    -re ".*in main after func1.*$gdb_prompt $" { pass "simple return" }

    -re "$gdb_prompt $" { fail "simple return" }

    timeout { fail "(timeout) simple return" }

    }

    # Set breakpoints in other interesting functions.

    gdb_test "break func2" "" "break func2"

    gdb_test "break func3" "" "break func3"

    gdb_test "continue" "return -5;" "continue to return of -5"

    send_gdb "return 5\n"

    gdb_expect {

        -re "Make .* return now.*y or n. $" {

            send_gdb "y\n"

            exp_continue

        }

    -re ".*tmp2 = func2.*$gdb_prompt $" { }

    -re "$gdb_prompt $" { fail "did not return (integer test)" }

    timeout { fail "(timeout) did not return (integer test)" }

    }

    gdb_test "next" "tmp3 = func3.*" "next over call to func2"

    gdb_test "p tmp2" ".* = 5" "correct value returned (integer test)"

    gdb_test "continue" "return -5.0;" "continue to return of -5.0"

    send_gdb "return 5.0\n"

    gdb_expect {

        -re "Make .* return now.*y or n. $" {

            send_gdb "y\n"

            exp_continue

        }

        -re ".*tmp3 = func3.*$gdb_prompt $" { }

        -re "$gdb_prompt $" { fail "did not return (double test)" }

        timeout { fail "(timeout) did not return (double test)" }

    }

    gdb_test "next" "printf.*" "next over call to func3"

    # This test is going to fail on all i*86 systems using an i*87.

    # When returning a floating point value from a function, all known

    # compilers do this via a `fldl' instruction, which pushes the floating

    # value on the i387 stack. This causes two problems:

    # a) Most i*86 targets do not store (or cannot store, see comment in

    #    in i386v-nat.c:i386_register_u_addr) the floating point registers

    #    to the target.

    # b) gdb would have to figure out if the `fldl' instruction (or variants

    #    of it) has already been executed. If not, it would have to simulate

    #    a push instruction, as it is not enough to write the register,

    #    the floating point `stack pointer' has to be updated too.

    #    Do not expect this to get fixed anytime soon.

    # This test also fails for sparc Solaris 2.3 & 2.4, but passes under 2.5

    # At the time the `next' is issued, the floating point unit for the

    # process is not yet initialized, and the storing of the floating

    # point value to the floating point return register is ignored.

    # Xfail it for current versions that are known to fail.  Presumably

    # if some future version does initialize the floating point unit at

    # process start, making this test pass, it will be for a version that

    # is not xfailed.

    setup_xfail "i*86-*-*" "sparc-*-solaris2.3*" "sparc-*-solaris2.4*"

    gdb_test "p tmp3" ".* = 5.*" "correct value returned double test (known problem with i*86 and sparc solaris"

}

# Start with a fresh gdb.

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

set timeout 30

return_tests