[deliverable/binutils-gdb.git] / gdb / testsuite / gdb.threads / schedlock.exp

# Copyright (C) 1996, 1997, 2002, 2003, 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 Daniel Jacobowitz <drow@mvista.com>
# (parts based on pthreads.exp by Fred Fish (fnf@cygnus.com).
#
# This test covers the various forms of "set scheduler-locking".

if $tracelevel then {
	strace $tracelevel
}

set prms_id 0
set bug_id 0

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

# The number of threads, including the main thread.
set NUM 2

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

# Now we can proceed with the real testing.

proc get_args { } {
  global list_count
  global gdb_prompt

  send_gdb "print args\n"
  gdb_expect {
    -re "\\\$\[0-9\]+ = {(\[0-9\]+), (\[0-9\]+)}.*$gdb_prompt"
      {
	set list_count [expr $list_count + 1]
	pass "listed args ($list_count)"
	return [list $expect_out(1,string) $expect_out(2,string)]
      }
    -re "$gdb_prompt"
      {
	fail "listed args ($list_count) (unknown output)"
      }
    timeout
      {
	fail "listed args ($list_count) (timeout)"
      }
  }
}

proc stop_process { description } {
  global gdb_prompt

  # 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"}
  gdb_expect {
    -re "Program received signal SIGINT.*$gdb_prompt $"
      {
	pass $description
      }
    timeout
      {
	fail "$description (timeout)"
      }
  }
}

proc get_current_thread { description } {
  global gdb_prompt

  send_gdb "bt\n"
  gdb_expect {
    -re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $"
      {
	pass $description
	return $expect_out(1,string)
      }
    -re "$gdb_prompt $"
      {
	fail "$description (unknown output)"
      }
    timeout
      {
	fail "$description (timeout)"
      }
  }
}

proc my_continue { msg } {
  send_gdb "continue\n"
  gdb_expect {
    -re "Continuing"
      { pass "continue ($msg)" }
    timeout
      { fail "continue ($msg) (timeout)" }
  }

  stop_process "stop all threads ($msg)"

  # Make sure we're in one of the non-main looping threads.
  gdb_breakpoint [concat [gdb_get_line_number "schedlock.exp: main loop"] " if arg != 0"]
  gdb_continue_to_breakpoint "return to loop ($msg)"
  delete_breakpoints
}

proc step_ten_loops { msg } {
    global gdb_prompt

    for {set i 0} {[expr $i < 10]} {set i [expr $i + 1]} {
	send_gdb "step\n"
	set other_step 0
	gdb_expect {
	    -re ".*myp\\) \\+\\+;\[\r\n\]+$gdb_prompt $" {
		pass "step to increment ($msg $i)"
	    }
	    -re "$gdb_prompt $" {
		if {$other_step == 0} {
		    set other_step 1
		    send_gdb "step\n"
		    exp_continue
		} else {
		    fail "step to increment ($msg $i)"
		    # FIXME cascade?
		}
	    }
	    timeout {
		fail "step to increment ($msg $i) (timeout)"
	    }
	}
    }
}

# Start with a fresh gdb.

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir

# 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'" ""
}

gdb_load ${binfile}

gdb_test "set print sevenbit-strings" ""
gdb_test "set width 0" ""

runto_main

# See if scheduler locking is available on this target.
send_gdb "set scheduler-locking off\n"
global gdb_prompt
gdb_expect {
  -re "Target .* cannot support this command"
    {
      unsupported "target does not support scheduler locking"
      return
    }
  -re "$gdb_prompt $"
    {
      pass "scheduler locking set to none"
    }
  timeout
    {
      unsupported "target does not support scheduler locking (timeout)"
      return
    }
}

gdb_breakpoint [gdb_get_line_number "schedlock.exp: last thread start"]
gdb_continue_to_breakpoint "all threads started"

global list_count
set list_count 0

set start_args [get_args]

# First make sure that all threads are alive.
my_continue "initial"

set cont_args [get_args]

set ok 1
for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
  if {[lindex $start_args $i] == [lindex $cont_args $i]} {
    set ok 0
  }
}
if { $ok } {
  pass "all threads alive"
} else {
  fail "all threads alive"
}

# We can't change threads, unfortunately, in current GDB.  Use
# whichever we stopped in.
set curthread [get_current_thread "find current thread (1)"]


# Test stepping without scheduler locking.
gdb_test "set scheduler-locking off"  ""

step_ten_loops "unlocked"

# Make sure we're still in the same thread.
set newthread [get_current_thread "find current thread (2)"]
if {$curthread == $newthread} {
    pass "step without lock does not change thread"
} else {
    fail "step without lock does not change thread (switched to thread $newthread)"
}

set start_args $cont_args
set cont_args [get_args]

set num_other_threads 0
for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
  if {[lindex $start_args $i] == [lindex $cont_args $i]} {
    if {$i == $curthread} {
      fail "current thread stepped (didn't run)"
    }
  } else {
    if {$i == $curthread} {
	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	    pass "current thread stepped"
	} else {
	    fail "current thread stepped (wrong amount)"
	}
    } else {
      set num_other_threads [expr $num_other_threads + 1]
    }
  }
}
if {$num_other_threads > 0} {
  pass "other threads ran - unlocked"
} else {
  fail "other threads ran - unlocked"
}

# Test continue with scheduler locking
gdb_test "set scheduler-locking on"  ""

my_continue "with lock"

# Make sure we're still in the same thread.
set newthread [get_current_thread "find current thread (3)"]
if {$curthread == $newthread} {
    pass "continue with lock does not change thread"
} else {
    fail "continue with lock does not change thread (switched to thread $newthread)"
}

set start_args $cont_args
set cont_args [get_args]

set num_other_threads 0
for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
  if {[lindex $start_args $i] == [lindex $cont_args $i]} {
    if {$i == $curthread} {
      fail "current thread ran (didn't run)"
    }
  } else {
    if {$i == $curthread} {
      pass "current thread ran"
    } else {
      incr num_other_threads
    }
  }
}
if {$num_other_threads > 0} {
  fail "other threads didn't run - locked"
} else {
  pass "other threads didn't run - locked"
}

# Test stepping with scheduler locking
step_ten_loops "locked"

# Make sure we're still in the same thread.
set newthread [get_current_thread "find current thread (2)"]
if {$curthread == $newthread} {
    pass "step with lock does not change thread"
} else {
    fail "step with lock does not change thread (switched to thread $newthread)"
}

set start_args $cont_args
set cont_args [get_args]

set num_other_threads 0
for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
  if {[lindex $start_args $i] == [lindex $cont_args $i]} {
    if {$i == $curthread} {
      fail "current thread stepped locked (didn't run)"
    }
  } else {
    if {$i == $curthread} {
	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	    pass "current thread stepped locked"
	} else {
	    fail "current thread stepped locked (wrong amount)"
	}
    } else {
      incr num_other_threads
    }
  }
}
if {$num_other_threads > 0} {
  fail "other threads didn't run - step locked"
} else {
  pass "other threads didn't run - step locked"
}

return 0
Commit	Line	Data
9b254dd1 DJ	1	# Copyright (C) 1996, 1997, 2002, 2003, 2007, 2008
9b254dd1 DJ	2	# Free Software Foundation, Inc.
0312286c DJ	3
	4	# This program is free software; you can redistribute it and/or modify
	5	# it under the terms of the GNU General Public License as published by
e22f8b7c	6	# the Free Software Foundation; either version 3 of the License, or
0312286c	7	# (at your option) any later version.
e22f8b7c	8	#
0312286c DJ	9	# This program is distributed in the hope that it will be useful,
	10	# but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	# GNU General Public License for more details.
e22f8b7c	13	#
0312286c	14	# You should have received a copy of the GNU General Public License
e22f8b7c	15	# along with this program. If not, see <http://www.gnu.org/licenses/>.
0312286c DJ	16
	17	# Please email any bugs, comments, and/or additions to this file to:
	18	# bug-gdb@prep.ai.mit.edu
	19
	20	# This file was written by Daniel Jacobowitz <drow@mvista.com>
	21	# (parts based on pthreads.exp by Fred Fish (fnf@cygnus.com).
	22	#
	23	# This test covers the various forms of "set scheduler-locking".
	24
	25	if $tracelevel then {
	26	strace $tracelevel
	27	}
	28
	29	set prms_id 0
	30	set bug_id 0
	31
	32	set testfile "schedlock"
	33	set srcfile ${testfile}.c
	34	set binfile ${objdir}/${subdir}/${testfile}
	35
18ecae38 DJ	36	# The number of threads, including the main thread.
	37	set NUM 2
	38
b5ab8ff3	39	if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
0312286c DJ	40	return -1
	41	}
	42
	43	# Now we can proceed with the real testing.
	44
	45	proc get_args { } {
	46	global list_count
	47	global gdb_prompt
	48
	49	send_gdb "print args\n"
	50	gdb_expect {
18ecae38	51	-re "\\\$\[0-9\]+ = {(\[0-9\]+), (\[0-9\]+)}.*$gdb_prompt"
0312286c DJ	52	{
	53	set list_count [expr $list_count + 1]
	54	pass "listed args ($list_count)"
18ecae38	55	return [list $expect_out(1,string) $expect_out(2,string)]
0312286c DJ	56	}
	57	-re "$gdb_prompt"
	58	{
	59	fail "listed args ($list_count) (unknown output)"
	60	}
	61	timeout
	62	{
	63	fail "listed args ($list_count) (timeout)"
	64	}
	65	}
	66	}
	67
	68	proc stop_process { description } {
	69	global gdb_prompt
	70
	71	# For this to work we must be sure to consume the "Continuing."
	72	# message first, or GDB's signal handler may not be in place.
	73	after 1000 {send_gdb "\003"}
	74	gdb_expect {
	75	-re "Program received signal SIGINT.*$gdb_prompt $"
	76	{
	77	pass $description
	78	}
	79	timeout
	80	{
	81	fail "$description (timeout)"
	82	}
	83	}
	84	}
	85
	86	proc get_current_thread { description } {
	87	global gdb_prompt
	88
	89	send_gdb "bt\n"
	90	gdb_expect {
	91	-re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $"
	92	{
	93	pass $description
	94	return $expect_out(1,string)
	95	}
	96	-re "$gdb_prompt $"
	97	{
	98	fail "$description (unknown output)"
	99	}
	100	timeout
	101	{
	102	fail "$description (timeout)"
	103	}
	104	}
	105	}
	106
	107	proc my_continue { msg } {
	108	send_gdb "continue\n"
	109	gdb_expect {
	110	-re "Continuing"
	111	{ pass "continue ($msg)" }
	112	timeout
	113	{ fail "continue ($msg) (timeout)" }
	114	}
	115
	116	stop_process "stop all threads ($msg)"
	117
a25fbfec	118	# Make sure we're in one of the non-main looping threads.
18ecae38	119	gdb_breakpoint [concat [gdb_get_line_number "schedlock.exp: main loop"] " if arg != 0"]
0312286c DJ	120	gdb_continue_to_breakpoint "return to loop ($msg)"
	121	delete_breakpoints
	122	}
	123
	124	proc step_ten_loops { msg } {
	125	global gdb_prompt
	126
	127	for {set i 0} {[expr $i < 10]} {set i [expr $i + 1]} {
	128	send_gdb "step\n"
	129	set other_step 0
	130	gdb_expect {
	131	-re ".*myp\\) \\+\\+;\[\r\n\]+$gdb_prompt $" {
	132	pass "step to increment ($msg $i)"
	133	}
	134	-re "$gdb_prompt $" {
	135	if {$other_step == 0} {
	136	set other_step 1
	137	send_gdb "step\n"
	138	exp_continue
	139	} else {
	140	fail "step to increment ($msg $i)"
	141	# FIXME cascade?
	142	}
	143	}
	144	timeout {
	145	fail "step to increment ($msg $i) (timeout)"
	146	}
	147	}
	148	}
	149	}
	150
	151	# Start with a fresh gdb.
	152
	153	gdb_exit
	154	gdb_start
	155	gdb_reinitialize_dir $srcdir/$subdir
	156
	157	# We'll need this when we send_gdb a ^C to GDB. Need to do it before we
	158	# run the program and gdb starts saving and restoring tty states.
	159	# On Ultrix, we don't need it and it is really slow (because shell_escape
	160	# doesn't use vfork).
	161	if ![istarget "--ultrix*"] then {
	162	gdb_test "shell stty intr '^C'" ""
	163	}
	164
	165	gdb_load ${binfile}
	166
	167	gdb_test "set print sevenbit-strings" ""
	168	gdb_test "set width 0" ""
	169
	170	runto_main
	171
	172	# See if scheduler locking is available on this target.
	173	send_gdb "set scheduler-locking off\n"
	174	global gdb_prompt
	175	gdb_expect {
	176	-re "Target .* cannot support this command"
	177	{
	178	unsupported "target does not support scheduler locking"
	179	return
	180	}
	181	-re "$gdb_prompt $"
	182	{
	183	pass "scheduler locking set to none"
184	}
185	timeout
186	{
187	unsupported "target does not support scheduler locking (timeout)"
188	return
189	}
190	}
191
192	gdb_breakpoint [gdb_get_line_number "schedlock.exp: last thread start"]
193	gdb_continue_to_breakpoint "all threads started"
194
195	global list_count
196	set list_count 0
197
198	set start_args [get_args]
199
200	# First make sure that all threads are alive.
201	my_continue "initial"
202
203	set cont_args [get_args]
204
18ecae38 DJ	205	set ok 1
18ecae38 DJ	206	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c	207	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
18ecae38	208	set ok 0
0312286c DJ	209	}
0312286c DJ	210	}
18ecae38 DJ	211	if { $ok } {
	212	pass "all threads alive"
	213	} else {
	214	fail "all threads alive"
	215	}
0312286c DJ	216
	217	# We can't change threads, unfortunately, in current GDB. Use
	218	# whichever we stopped in.
	219	set curthread [get_current_thread "find current thread (1)"]
	220
	221
	222
	223
	224	# Test stepping without scheduler locking.
	225	gdb_test "set scheduler-locking off" ""
	226
	227	step_ten_loops "unlocked"
	228
	229	# Make sure we're still in the same thread.
	230	set newthread [get_current_thread "find current thread (2)"]
	231	if {$curthread == $newthread} {
	232	pass "step without lock does not change thread"
	233	} else {
	234	fail "step without lock does not change thread (switched to thread $newthread)"
	235	}
	236
	237	set start_args $cont_args
	238	set cont_args [get_args]
	239
a25fbfec	240	set num_other_threads 0
18ecae38	241	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	242	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	243	if {$i == $curthread} {
	244	fail "current thread stepped (didn't run)"
0312286c DJ	245	}
	246	} else {
	247	if {$i == $curthread} {
	248	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	249	pass "current thread stepped"
	250	} else {
	251	fail "current thread stepped (wrong amount)"
	252	}
	253	} else {
a25fbfec	254	set num_other_threads [expr $num_other_threads + 1]
0312286c DJ	255	}
	256	}
	257	}
a25fbfec	258	if {$num_other_threads > 0} {
18ecae38	259	pass "other threads ran - unlocked"
a25fbfec	260	} else {
18ecae38	261	fail "other threads ran - unlocked"
a25fbfec	262	}
0312286c DJ	263
	264	# Test continue with scheduler locking
	265	gdb_test "set scheduler-locking on" ""
	266
	267	my_continue "with lock"
	268
	269	# Make sure we're still in the same thread.
	270	set newthread [get_current_thread "find current thread (3)"]
	271	if {$curthread == $newthread} {
	272	pass "continue with lock does not change thread"
	273	} else {
	274	fail "continue with lock does not change thread (switched to thread $newthread)"
	275	}
	276
	277	set start_args $cont_args
	278	set cont_args [get_args]
	279
18ecae38 DJ	280	set num_other_threads 0
18ecae38 DJ	281	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	282	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	283	if {$i == $curthread} {
	284	fail "current thread ran (didn't run)"
0312286c DJ	285	}
	286	} else {
	287	if {$i == $curthread} {
	288	pass "current thread ran"
	289	} else {
18ecae38	290	incr num_other_threads
0312286c DJ	291	}
	292	}
	293	}
18ecae38 DJ	294	if {$num_other_threads > 0} {
	295	fail "other threads didn't run - locked"
	296	} else {
	297	pass "other threads didn't run - locked"
	298	}
0312286c DJ	299
	300	# Test stepping with scheduler locking
	301	step_ten_loops "locked"
	302
	303	# Make sure we're still in the same thread.
	304	set newthread [get_current_thread "find current thread (2)"]
	305	if {$curthread == $newthread} {
	306	pass "step with lock does not change thread"
	307	} else {
	308	fail "step with lock does not change thread (switched to thread $newthread)"
	309	}
	310
	311	set start_args $cont_args
	312	set cont_args [get_args]
	313
18ecae38 DJ	314	set num_other_threads 0
18ecae38 DJ	315	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	316	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	317	if {$i == $curthread} {
	318	fail "current thread stepped locked (didn't run)"
0312286c DJ	319	}
	320	} else {
	321	if {$i == $curthread} {
	322	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	323	pass "current thread stepped locked"
	324	} else {
	325	fail "current thread stepped locked (wrong amount)"
	326	}
	327	} else {
18ecae38	328	incr num_other_threads
0312286c DJ	329	}
	330	}
	331	}
18ecae38 DJ	332	if {$num_other_threads > 0} {
	333	fail "other threads didn't run - step locked"
	334	} else {
	335	pass "other threads didn't run - step locked"
	336	}
0312286c DJ	337
0312286c DJ	338	return 0