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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 <http://www.gnu.org/licenses/>.

# This test is based on gdb.base/attach.exp with modifications by Jeff Johnston
# <jjohnstn@redhat.com> and Jan Kratochvil <jan.kratochvil@redhat.com>.

# This test only works on Linux
if { ![isnative] || [is_remote host] || ![istarget *-linux*] } {
    continue
}

set testfile "attachstop-mt"
set srcfile  ${testfile}.c
set binfile  ${objdir}/${subdir}/${testfile}
set escapedbinfile  [string_to_regexp ${objdir}/${subdir}/${testfile}]

#execute_anywhere "rm -f ${binfile}"
remote_exec build "rm -f ${binfile}"
# For debugging this test
#
#log_user 1

# build the test case
#
if  { [gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
    untested attachstop-mt.exp
    return -1
}

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.

set testpid [eval exec $binfile &]

# No race
sleep 2

# The testcase has three threads, find some other thread TID for $testpid2.
set tids [exec sh -c "echo /proc/$testpid/task/*"]
regsub -all /proc/$testpid/task/ $tids {} tids
if {$tids == "*"} {
    unresolved "/proc/PID/task is not supported (kernel-2.4?)"
    remote_exec build "kill -9 ${testpid}"
    return -1
}
set tids [lsort -integer [split $tids]]
if {[llength $tids] != 3 || [lindex $tids 0] != $testpid} {
    verbose -log "Invalid TIDs <$tids> for PID $testpid"
    fail "Invalid TIDs found"
    remote_exec build "kill -9 ${testpid}"
    return -1
}
set testpid2 [lindex $tids 2]

# Initial sanity test it is normally sleeping
set status2 /proc/${testpid}/task/${testpid2}/status
set fileid0 [open $status2 r];
gets $fileid0 line1;
gets $fileid0 line2;
close $fileid0;

set test "attach0, initial sanity check of the sleeping state"
if {[string match "*(sleeping)*" $line2]} {
  pass $test
} else {
  fail $test
}

# Sttach and detach to test it will not become stopped
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

set test "attach0 to sleeping"
gdb_test_multiple "attach $testpid" "$test" {
    -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
        pass "$test"
    }
}

gdb_test "gcore /dev/null" ".*aved corefile.*" "attach0 to sleeping gcore invocation"

gdb_test "thread 2" ".*witching to thread 2 .*" "attach0 to sleeping switch thread"

gdb_test "bt" ".*sleep.*func.*" "attach0 to sleeping bt"

# Exit and detach the process.

gdb_exit

# No race
sleep 2

# Check it did not get stopped by our gdb
set fileid1 [open $status2 r];
gets $fileid1 line1;
gets $fileid1 line2;
close $fileid1;

set test "attach1, post-gdb sanity check of the sleeping state - Red Hat BZ 197584"
if {[string match "*(sleeping)*" $line2]} {
  pass $test
} else {
  fail $test
}

# Stop the program 
remote_exec build "kill -s STOP ${testpid}"

# No race
sleep 2

# Check it really got stopped by kill(1)
set fileid2 [open $status2 r];
gets $fileid2 line1;
gets $fileid2 line2;
close $fileid2;

set test "attach2, initial sanity check of the stopped state"
if {[string match "*(stopped)*" $line2]} {
  pass $test
} else {
  fail $test
}

# Start with clean gdb
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}

# Verify that we can attach to the process by first giving its
# executable name via the file command, and using attach with the
# process ID.

set test "set file, before attach3 to stopped process"
gdb_test_multiple "file $binfile" "$test" {
   -re "Load new symbol table from.*y or n. $" {
        gdb_test "y" "Reading symbols from $escapedbinfile\.\.\.*done." \
                "$test (re-read)"
    }
    -re "Reading symbols from $escapedbinfile\.\.\.*done.*$gdb_prompt $" {
        pass "$test"
    }
}

set test "attach3 to stopped, after setting file"
gdb_test_multiple "attach $testpid" "$test" {
    -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
        pass "$test"
    }
}

# We may be already after the threads phase.
# `thread 2' command is important for the test to switch the current thread to
# a non-primary one for the detach process.

gdb_test "thread 2" ".*(witching to thread 2 |hread ID 2 not known).*" "attach3 to stopped switch thread"
gdb_test "bt" ".*sleep.*(func|main).*" "attach3 to stopped bt"

# Exit and detach the process.
gdb_exit

# Stop the program 
remote_exec build "kill -s STOP ${testpid}"

# No race
sleep 2

# Continue the test as we would hit another expected bug regarding
#       Program received signal SIGSTOP, Stopped (signal).
# across NPTL threads.

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

# Verify that we can attach to the process just by giving the
# process ID.
   
set test "attach4 to stopped, after setting file"
gdb_test_multiple "attach $testpid" "$test" {
    -re "Attaching to program.*`?$escapedbinfile'?, process $testpid.*$gdb_prompt $" {
        pass "$test"
    }
}

# We may be already after the threads phase.
# `thread 2' command is important for the test to switch the current thread to
# a non-primary one for the detach process.

gdb_test "thread 2" ".*(witching to thread 2 |hread ID 2 not known).*" "attach4 to stopped switch thread"
gdb_test "bt" ".*sleep.*(func|main).*" "attach4 to stopped bt"

# RHEL3U8 kernel-2.4.21-47.EL will not return SIGINT but only shorten the sleep.
gdb_breakpoint [gdb_get_line_number "Ridiculous time"]
gdb_breakpoint [gdb_get_line_number "cut the sleep time"]
set test "attach4 continue"
send_gdb "continue\n"
gdb_expect {
  -re "Continuing"
    { pass "continue ($test)" }
  timeout
    { fail "continue ($test) (timeout)" }
}

# For this to work we must be sure to consume the "Continuing."
# message first, or GDB's signal handler may not be in place.
after 1000 {send_gdb "\003"}
set test "attach4 stop by interrupt"
gdb_expect {
  -re "Program received signal SIGINT.*$gdb_prompt $"
    {
      pass $test
    }
  -re "Breakpoint \[0-9\].*$srcfile.*$gdb_prompt $"
    {
      pass $test
    }
  timeout
    {
      fail "$test (timeout)"
    }
}

gdb_exit

# No race
sleep 2

# At this point, the process should be sleeping

set fileid4 [open $status2 r];
gets $fileid4 line1;
gets $fileid4 line2;
close $fileid4;

set test "attach4, exit leaves process sleeping"
if {[string match "*(sleeping)*" $line2]} {
  pass $test
} else {
  fail $test
}

# 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.
   
remote_exec build "kill -9 ${testpid}"

return 0