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# step.exp -- Expect script to test gdb with step.c

# 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 Hiro Sugawara. (hiro@lynx.com)

#

# This test really needs some major surgery to be acceptable, but

# I'm just about burnt out on lynx work, so I'm not doing it now.

#

#       * The test has an indeterminate number of pass/fails

#       for each run (it runs a small group of tests until

#       it's timer kicks off).  This is very bad for nightly

#       automated regression testing.

#

#       * It tries to "step" from withint he prologue of a

#       function.  This isn't support in gdb (it's going

#       to act like a continue).

#

#       * This test rarely check that it stopped in sensible

#       places.  (see previous bullet -- this test doesn't

#       catch the fact it continued rather than stepped)

if $tracelevel then {

        strace $tracelevel

}

set program_exited 0

proc set_bp { where } {

    global gdb_prompt

    send_gdb "break $where\n"

    # The first regexp is what we get with -g, the second without -g.

    gdb_expect {

        -re "Break.* at .*: file .*, line \[0-9\]*.*$gdb_prompt $" {}

        -re "Breakpoint \[0-9\]* at 0x\[0-9a-f\]*.*$gdb_prompt $" {}

        -re "$gdb_prompt $" { fail "setting breakpoint at $where" ; return 0 }

        timeout { fail "setting breakpoint at $where (timeout)" ; return 0 }

    }

    pass "set_bp"

}

proc step_it { cmd } {

    global gdb_prompt

    global program_exited

    send_gdb "$cmd\n"

    gdb_expect {

        -re "0x\[0-9A-Fa-f\]* *in.*\r\n$gdb_prompt $" { pass "step_it"; return 0 }

        -re "0x\[0-9A-Fa-f\]* *\[0-9\]*.*\r\n$gdb_prompt $" { pass "step_it"; return 1 }

        -re "Program exited .*\n$gdb_prompt $" {

                set program_exited 1

                return -1

            }

        -re "$gdb_prompt $"     { fail "single-stepping ($cmd).\n" ; return -1 }

        timeout { fail "single-stepping ($cmd) timout.\n" ; return -1 }

    }

}

proc step_inst {} {

    step_it "stepi"

}

proc step_source {} {

    step_it "step"

}

proc continue_all {} {

    global gdb_prompt

    send_gdb "continue\n"

    gdb_expect {

        -re "Breakpoint \[0-9\]*, thread\[0-9\]* .*$gdb_prompt $" {

            pass "continue_all"

            return 0

        }

        -re "Program exited .*\n$gdb_prompt $" {

            set program_exited 1

            return 1;

        }

        -re "$gdb_prompt $" { fail "continue" ; return -1 }

        timeout { fail "continue (timeout)" ; return -1 }

    }

}

proc check_threads { num_threads } {

    global gdb_prompt

    set curr_thread 0

    send_gdb "info threads\n"

    while { $num_threads > 0 } {

        gdb_expect {

            -re "\\* *\[0-9\]* process \[0-9\]* thread \[0-9\]* .*\n" {

                incr curr_thread

                set num_threads [expr $num_threads - 1]

            }

            -re " *\[0-9\]* process \[0-9\]* thread \[0-9\]* .*\n" {

                set num_threads [expr $num_threads - 1]

            }

            -re "$gdb_prompt $" {

                if { $num_threads < 0 } {

                    fail "check_threads (too many)" ; return -1

                }

                break

            }

            timeout { fail "check_threads (timeout)" ; return -1 }

        }

    }

    if { $curr_thread == 0 } {

        fail "check_threads (no current thread)\n"

        return -1

    }

    if { $curr_thread > 1 } {

        fail "check_threads (more than one current thread)\n"

        return -1

    }

    return 0

}

proc test_cond_wait {} {

    global program_exited

    set_bp      135

    runto       179

    while { 1 } {

        set stepi_counter 0

        while { [step_inst] } {

                if { $program_exited } { break }

                incr stepi_counter

                if { $stepi_counter > 30 } {

                        fail "too many stepi's per line\n"

                        return -1

                }

        }

        if { $program_exited } { break }

        step_source

        if { $program_exited } { break }

        continue_all

        if { $program_exited } { break }

        check_threads 3

    }

}

proc do_tests {} {

    global prms_id

    global bug_id

    global subdir

    global objdir

    global srcdir

    global binfile

    global gdb_prompt

    set prms_id 0

    set bug_id 0

    # Start with a fresh gdb.

    gdb_exit

    gdb_start

    gdb_reinitialize_dir $srcdir/$subdir

    gdb_load $objdir/$subdir/$binfile

    send_gdb "set width 0\n"

    gdb_expect -re "$gdb_prompt $"

    test_cond_wait

}

# Check to see if we have an executable to test.  If not, then either we

# haven't tried to compile one, or the compilation failed for some reason.

# In either case, just notify the user and skip the tests in this file.

set binfile "step"

set srcfile "step.c"

if ![file exists $objdir/$subdir/$binfile] then {

    if $all_flag then {

        warning "$binfile does not exist; tests suppressed."

    }

} else {

    do_tests

}