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# Copyright (C) 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
# 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 <http://www.gnu.org/licenses/>.

# 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

# This only works with native configurations
if ![isnative] then {
    return
}

set testfile "pthreads"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}

# regexp for "horizontal" text (i.e. doesn't include newline or
# carriage return)
set horiz "\[^\n\r\]*"

if [istarget "*-*-linux"] then {
    set target_cflags "-D_MIT_POSIX_THREADS"
} else {
    set target_cflags ""
}

if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
    return -1
}


# Start with a fresh gdb.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

gdb_test "set print sevenbit-strings" ""
#gdb_test "set print address off" ""
gdb_test "set width 0" ""

# We'll need this when we send_gdb a ^C to GDB.  Need to do it before we
# run the program and gdb starts saving and restoring tty states.
# On Ultrix, we don't need it and it is really slow (because shell_escape
# doesn't use vfork).
if ![istarget "*-*-ultrix*"] then {
    gdb_test "shell stty intr '^C'" ""
}

proc all_threads_running {} {
    global gdb_prompt
    global srcfile

    # Reset all the counters to zero.
    gdb_test "set var common_routine::hits=0" ""
    gdb_test "set var common_routine::from_thread1=0" ""
    gdb_test "set var common_routine::from_thread2=0" ""
    gdb_test "set var common_routine::from_main=0" ""
    gdb_test "set var common_routine::full_coverage=0" ""

    # Disable all breakpoints.
    gdb_test "disable" ""

    # Set up a breakpoint that will cause us to stop when we have
    # been called 15 times.  This should be plenty of time to allow
    # every thread to run at least once, since each thread sleeps for
    # one second between calls to common_routine.
    gdb_test "tbreak common_routine if hits >= 15" ""

    # Start all the threads running again and wait for the inferior
    # to stop.  Since no other breakpoints are set at this time
    # we should stop only when we have been previously called 15 times.

    send_gdb "continue\n"
    gdb_expect {
        -re "Continuing.*common_routine.*at.*$srcfile.*$gdb_prompt $" {}
        default {
            fail "continue until common routine run 15 times"
            return 0
        }
        timeout {
            fail "continue until common routine run 15 times (timeout)"
            return 0
        }
    }

    # Check that we stopped when we actually expected to stop, by
    # verifying that there have been 15 previous hits.

    # NOTE: Because of synchronization behavior, it is possible for
    # more than one thread to increment "hits" between one breakpoint
    # trap and the next.  So stopping after 16 or 17 hits should be
    # considered acceptable.

    send_gdb "p common_routine::hits\n"
    gdb_expect {
        -re ".*= 15\r\n$gdb_prompt $" {
            pass "stopped before calling common_routine 15 times"
        }
        -re ".*= 16\r\n$gdb_prompt $" {
            pass "stopped before calling common_routine 15 times (16 times)"
        }
        -re ".*= 17\r\n$gdb_prompt $" {
            pass "stopped before calling common_routine 15 times (17 times)"
        }
        default {
            fail "stopped before calling common_routine 15 times"
            return 0
        }
        -re ".*$gdb_prompt $" {
            fail "stopped before calling common_routine 15 times"
            return 0
        }
        timeout {
            fail "stopped before calling common_routine 15 times (timeout)"
            return 0
        }
    }

    # Also check that all of the threads have run, which will only be true
    # if the full_coverage variable is set.

    send_gdb "p common_routine::full_coverage\n"
    gdb_expect {
        -re ".* = 1.*$gdb_prompt $" {}
        -re ".* = 0.*$gdb_prompt $" {
            fail "some threads didn't run"
            return 0
        }
        default {
            fail "some threads didn't run"
            return 0
        }
        timeout {
            fail "some threads didn't run (timeout)"
            return 0
        }
    }

    # Looks fine, return success.
    return 1
}

proc test_startup {} {
    global srcdir srcfile gdb_prompt expect_out
    global horiz
    global main_id thread1_id thread2_id

    # We should be able to do an info threads before starting any others.
    send_gdb "info threads\n"
    gdb_expect {
        -re ".*Thread.*main.*$gdb_prompt $" {
            pass "info threads"
        }
        -re "\r\n$gdb_prompt $" {
            unsupported "gdb does not support pthreads for this machine"
            return 0
        }
    }

    # Extract the thread id number of main thread from "info threads" output.
    send_gdb "info threads\n"
    gdb_expect -re "(\[0-9\]+)(${horiz}Thread${horiz}main.*)($gdb_prompt $)"
    set main_id $expect_out(1,string)

    # Check that we can continue and create the first thread.
    gdb_test "break thread1" "Breakpoint .* file .*$srcfile.*"
    gdb_test "continue" \
            "Continuing.*Breakpoint .*, thread1 \\(arg=0xfeedface\\).*at.*$srcfile.*" \
            "Continue to creation of first thread"
    gdb_test "disable" ""

    # Extract the thread id number of thread 1 from "info threads" output.
    send_gdb "info threads\n"
    gdb_expect -re "(\[0-9\]+)(${horiz}Thread${horiz}thread1.*)($gdb_prompt $)"
    set thread1_id $expect_out(1,string)

    # Check that we can continue and create the second thread,
    # ignoring the first thread for the moment.
    gdb_test "break thread2" "Breakpoint .* file .*$srcfile.*"
    gdb_test "continue" \
            "Continuing.*Breakpoint .*, thread2 \\(arg=0xdeadbeef\\).*at.*$srcfile.*" \
            "Continue to creation of second thread"

    # Extract the thread id number of thread 2 from "info threads" output.
    send_gdb "info threads\n"
    gdb_expect -re "(\[0-9\]+)(${horiz}Thread${horiz}thread2.*)($gdb_prompt $)"
    set thread2_id $expect_out(1,string)

    return 1
}

proc check_control_c {} {
    global gdb_prompt

    # Verify that all threads are running.
    if [all_threads_running] then {
        pass "All threads running after startup"
    }

    # Send a continue followed by ^C to the process to stop it.
    send_gdb "continue\n"
    gdb_expect {
        -re "Continuing." {
            pass "Continue with all threads running"
        }
        timeout {
            fail "Continue with all threads running (timeout)"
        }
    }
    after 2000
    send_gdb "\003"
    set description "Stopped with a ^C"
    gdb_expect {
        -re "Program received signal SIGINT.*$gdb_prompt $" {
            pass $description
        }
        -re "Quit.*$gdb_prompt $" {
            pass $description
        }
        timeout {
            fail "$description (timeout)"
            return 1;
        }
    }
    gdb_test "bt" ""

    # Verify that all threads can be run again after a ^C stop.
    if [all_threads_running] then {
        pass "All threads running after continuing from ^C stop"
    }
    return 0;
}

proc check_backtraces {} {
    global gdb_prompt main_id thread1_id thread2_id

    # Check that the "thread apply N backtrace" command works

    gdb_test "thread apply $main_id backtrace" \
            ".* in main \\(argc=.*, argv=.*\\).*" \
            "check backtrace from main thread"
    gdb_test "thread apply $thread1_id backtrace" \
            ".* in thread1 \\(arg=0xfeedface\\).*" \
            "check backtrace from thread 1"
    gdb_test "thread apply $thread2_id backtrace" \
            ".* in thread2 \\(arg=0xdeadbeef\\).*" \
            "check backtrace from thread 2"

    # Check that we can apply the backtrace command to all
    # three threads with a single gdb command

    gdb_test "thread apply $main_id $thread1_id $thread2_id bt" \
            ".* in main .* in thread1 .* in thread2.*" \
            "apply backtrace command to all three threads"

    # Check that we can do thread specific backtraces
    # This also tests that we can do thread specific breakpoints.

    gdb_test "break common_routine thread $thread2_id" \
            "Breakpoint .* at 0x.* file .* line .*" \
            "set break at common_routine in thread 2"

    send_gdb "continue\n"
    gdb_expect {
        -re "Breakpoint .* common_routine \\(arg=2\\).*" {
            pass "continue to bkpt at common_routine in thread 2"
            send_gdb "backtrace\n"
            gdb_expect {
                -re "#0.*common_routine \\(arg=2\\).*#1.*thread2.*" {
                    pass "backtrace from thread 2 bkpt in common_routine"
                }
                default {
                    fail "backtrace from thread 2 bkpt in common_routine"
                }
                timeout {
                    fail "backtrace from thread 2 bkpt in common_routine (timeout)"
                }
            }
        }
        -re "Breakpoint .* common_routine \\(arg=0\\).*" {
            fail "continue to bkpt at common_routine in thread 2 (arg=0)"
        }
        -re "Breakpoint .* common_routine \\(arg=1\\).*" {
            fail "continue to bkpt at common_routine in thread 2 (arg=1)"
        }
        -re ".*$gdb_prompt" {
            fail "continue to bkpt at common_routine in thread 2"
        }
        default {
            fail "continue to bkpt at common_routine in thread 2 (default)"
        }
        timeout {
            fail "continue to bkpt at common_routine in thread 2 (timeout)"
        }
    }
}

setup_xfail "alpha-*-osf*"
if [runto_main] then {
    clear_xfail "alpha-*-osf*"
    if [test_startup] then {
        if [check_control_c] then {
            warning "Could not stop child with ^C; skipping rest of tests.\n"
            return;
        }
        check_backtraces
    }
}
clear_xfail "alpha-*-osf*"