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# Copyright 2008, 2009, 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 .

# This test was created by modifying attach-stopped.exp.

# This file was created by Jan Kratochvil .

# This test only works on Linux

if { ![isnative] || [is_remote host] || ![istarget *-linux*] } {

    continue

}

set testfile "attach-into-signal"

set srcfile  ${testfile}.c

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

set escapedbinfile  [string_to_regexp ${objdir}/${subdir}/${testfile}]

remote_exec build "rm -f ${binfile}"

# For debugging this test

#

#log_user 1

proc corefunc { threadtype } {

    global srcfile

    global binfile

    global escapedbinfile

    global srcdir

    global subdir

    global gdb_prompt

    if [get_compiler_info ${binfile}] {

        return -1

    }

    # Start the program running and then wait for a bit, to be sure

    # that it can be attached to.

    # Statistically there is a better chance without giving process a nice.

    set testpid [eval exec $binfile &]

    exec sleep 2

    # Run 2 passes of the test.

    # The C file inferior stops pending its signals if a single one is lost,

    # we test successful redelivery of the caught signal by the 2nd pass.

    # linux-2.6.20.4.x86_64 had maximal attempt # 20 in 4 test runs.

    set attempts 100

    set attempt 1

    set passes 1

    while { $passes < 3 && $attempt <= $attempts } {

        set stoppedtry 0

        while { $stoppedtry < 10 } {

            if [catch {open /proc/${testpid}/status r} fileid] {

                set stoppedtry 10

                break

            }

            gets $fileid line1;

            gets $fileid line2;

            close $fileid;

            if {![string match "*(stopped)*" $line2]} {

                # No PASS message as we may be looping in multiple attempts.

                break

            }

            sleep 1

            set stoppedtry [expr $stoppedtry + 1]

        }

        if { $stoppedtry >= 10 } {

            verbose -log $line2

            set test "$threadtype: process is still running on the attempt # $attempt of $attempts"

            break

        }

        # Main test:

        set test "$threadtype: attach (pass $passes), pending signal catch"

        if {[gdb_test_multiple "attach $testpid" $test {

            -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*Received Alarm clock.*$gdb_prompt $" {

                # nonthreaded:

                pass $test

                verbose -log "$test succeeded on the attempt # $attempt of $attempts"

                set passes [expr $passes + 1]

            }

            -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {

                # nonthreaded:

                # We just lack the luck, we should try it again.

                set attempt [expr $attempt + 1]

            }

            -re "Attaching to process $testpid.*Received Alarm clock.*$gdb_prompt $" {

                # threaded:

                pass $test

                verbose -log "$test succeeded on the attempt # $attempt of $attempts"

                set passes [expr $passes + 1]

            }

            -re "Attaching to process $testpid.*$gdb_prompt $" {

                # threaded:

                # We just lack the luck, we should try it again.

                set attempt [expr $attempt - 1]

            }

        }] != 0 } {

            break

        }

        gdb_test "detach" "Detaching from.*" ""

    }

    if {$passes < 3} {

        if {$attempt > $attempts} {

            unresolved $test

        } else {

            fail $test

        }

    }

    # Exit and detach the process.

    gdb_exit

    # Make sure we don't leave a process around to confuse

    # the next test run (and prevent the compile by keeping

    # the text file busy), in case the "set should_exit" didn't

    # work.

    # Continue the program - some Linux kernels need it before -9 if the

    # process is stopped.

    remote_exec build "kill -s CONT ${testpid}"

    remote_exec build "kill -9 ${testpid}"

}

# Start with clean gdb

gdb_exit

# build the test case first without threads

#

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {

    untested "attach-into-signal.exp (unthreaded)"

    return -1

}

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

gdb_test_no_output "set debug lin-lwp 1" ""

corefunc nonthreaded

# build the test case also with threads

#

if  { [gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug additional_flags=-DUSE_THREADS}] != "" } {

    untested "attach-into-signal.exp (threaded)"

    return -1

}

gdb_start

gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}

gdb_test_no_output "set debug lin-lwp 1" ""

corefunc threaded