Subversion Repositories openrisc_2011-10-31

# Copyright (C) 2004, 2007, 2008, 2010 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 3 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, see .

# Test making hand function calls in multiple threads.

set NR_THREADS 4

if $tracelevel then {

        strace $tracelevel

}

set testfile "hand-call-in-threads"

set srcfile ${testfile}.c

set binfile ${objdir}/${subdir}/${testfile}

if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}" "additional_flags=-DNR_THREADS=$NR_THREADS"]] != "" } {

    return -1

}

# Some targets can't do function calls, so don't even bother with this

# test.

if [target_info exists gdb,cannot_call_functions] {

    setup_xfail "*-*-*" 2416

    fail "This target can not call functions"

    continue

}

proc get_dummy_frame_number { } {

    global gdb_prompt

    gdb_test_multiple "bt" "" {

        -re "#(\[0-9\]*) *.*$gdb_prompt $" {

            return $expect_out(1,string)

        }

        -re "$gdb_prompt $" {

            return ""

        }

        timeout {

            return ""

        }

    }

    return ""

}

gdb_exit

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

if { ![runto_main] } {

    fail "Can't run to main"

    return 0

}

gdb_test "break all_threads_running" \

         "Breakpoint 2 at .*: file .*${srcfile}, line .*" \

         "breakpoint on all_threads_running"

gdb_test "break hand_call" \

         "Breakpoint 3 at .*: file .*${srcfile}, line .*" \

         "breakpoint on hand_call"

# Run the program and make sure GDB reports that we stopped after

# hitting breakpoint 2 in all_threads_running().

gdb_test "continue" \

         ".*Breakpoint 2, all_threads_running ().*" \

         "run to all_threads_running"

# Before we start making hand function calls, turn on scheduler locking.

gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"

gdb_test "show scheduler-locking" ".* locking scheduler .* is \"on\"." "show scheduler locking on"

# Now hand-call a function in each thread, having the function

# stop without returning.

# Add one for the main thread.

set total_nr_threads [expr $NR_THREADS + 1]

# Thread numbering in gdb is origin-1, so begin numbering at 1.

for { set i 1 } { $i <= $total_nr_threads } { incr i } {

    set thread_nr $i

    gdb_test "thread $thread_nr" ".*" \

        "prepare to make hand call, thread $thread_nr"

    gdb_test "call hand_call()" "Breakpoint 3, .*" \

        "hand call, thread $thread_nr"

}

# Now have each hand-called function return.

# Turn confirmation off for the "return" command.

gdb_test_no_output "set confirm off"

clear_xfail "*-*-*"

for { set i 1 } { $i <= $total_nr_threads } { incr i } {

    set thread_nr $i

    gdb_test "thread $thread_nr" ".*" \

        "prepare to discard hand call, thread $thread_nr"

    set frame_number [get_dummy_frame_number]

    if { "$frame_number" == "" } {

        fail "dummy stack frame number, thread $thread_nr"

        # Need something.

        set frame_number 0

    } else {

        pass "dummy stack frame number, thread $thread_nr"

    }

    # Pop the dummy frame.

    gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"

    gdb_test "return" ".*" "discard hand call, thread $thread_nr"

    # In case getting the dummy frame number failed, re-enable for next iter.

    clear_xfail "*-*-*"

}

# Make sure all dummy frames got popped.

gdb_test_multiple "maint print dummy-frames" "all dummies popped" {

    -re ".*stack=.*$gdb_prompt $" {

        fail "all dummies popped"

    }

    -re ".*$gdb_prompt $" {

        pass "all dummies popped"

    }

}

# Before we resume the full program, turn off scheduler locking.

gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"

gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"

# Continue one last time, the program should exit normally.

#

# ??? This currently doesn't work because gdb doesn't know how to singlestep

# over reported breakpoints that weren't in the last thread to run.

# Commented out until then.

#

# For reference sake ...

# An alternative is to manually work around the issue by manually setting

# the thread back to the first thread: the program is still at the

# all_threads_running breakpoint, which wasn't the last thread to run,

# and gdb doesn't know how to singlestep over reported breakpoints that

# weren't in the last thread to run.

#gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"

#

#gdb_continue_to_end "hand-call-in-threads"

return 0