[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
  global NUM

  set pattern "(\[0-9\]+)"
  for {set i 1} {[expr $i < $NUM]} {incr i} {
    append pattern ", (\[0-9\]+)"
  }

  send_gdb "print args\n"
  gdb_expect {
    -re "\\\$\[0-9\]+ = {$pattern}.*$gdb_prompt"
      {
	set list_count [expr $list_count + 1]
	pass "listed args ($list_count)"

	set result ""
	for {set i 1} {[expr $i <= $NUM]} {incr i} {
	  lappend result $expect_out($i,string)
	}
	return $result
      }
    -re "$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 bad 0
for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
  if {[lindex $start_args $i] == [lindex $cont_args $i]} {
    incr bad
  }
}
if { $bad == 0 } {
  pass "all threads alive"
} else {
  fail "all threads alive ($bad/$NUM did not run)"
}

# 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
e09490f1 DJ	48	global NUM
	49
	50	set pattern "(\[0-9\]+)"
	51	for {set i 1} {[expr $i < $NUM]} {incr i} {
	52	append pattern ", (\[0-9\]+)"
	53	}
0312286c DJ	54
	55	send_gdb "print args\n"
	56	gdb_expect {
e09490f1	57	-re "\\\$\[0-9\]+ = {$pattern}.*$gdb_prompt"
0312286c DJ	58	{
	59	set list_count [expr $list_count + 1]
	60	pass "listed args ($list_count)"
e09490f1 DJ	61
	62	set result ""
	63	for {set i 1} {[expr $i <= $NUM]} {incr i} {
	64	lappend result $expect_out($i,string)
	65	}
	66	return $result
0312286c DJ	67	}
	68	-re "$gdb_prompt"
	69	{
	70	fail "listed args ($list_count) (unknown output)"
	71	}
	72	timeout
	73	{
	74	fail "listed args ($list_count) (timeout)"
	75	}
	76	}
	77	}
	78
	79	proc stop_process { description } {
	80	global gdb_prompt
	81
	82	# For this to work we must be sure to consume the "Continuing."
	83	# message first, or GDB's signal handler may not be in place.
	84	after 1000 {send_gdb "\003"}
	85	gdb_expect {
	86	-re "Program received signal SIGINT.*$gdb_prompt $"
	87	{
	88	pass $description
	89	}
	90	timeout
	91	{
	92	fail "$description (timeout)"
	93	}
	94	}
	95	}
	96
	97	proc get_current_thread { description } {
	98	global gdb_prompt
	99
	100	send_gdb "bt\n"
	101	gdb_expect {
	102	-re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $"
	103	{
	104	pass $description
	105	return $expect_out(1,string)
	106	}
	107	-re "$gdb_prompt $"
	108	{
	109	fail "$description (unknown output)"
	110	}
	111	timeout
	112	{
	113	fail "$description (timeout)"
	114	}
	115	}
	116	}
	117
	118	proc my_continue { msg } {
	119	send_gdb "continue\n"
	120	gdb_expect {
	121	-re "Continuing"
	122	{ pass "continue ($msg)" }
	123	timeout
	124	{ fail "continue ($msg) (timeout)" }
	125	}
	126
	127	stop_process "stop all threads ($msg)"
	128
a25fbfec	129	# Make sure we're in one of the non-main looping threads.
18ecae38	130	gdb_breakpoint [concat [gdb_get_line_number "schedlock.exp: main loop"] " if arg != 0"]
0312286c DJ	131	gdb_continue_to_breakpoint "return to loop ($msg)"
	132	delete_breakpoints
	133	}
	134
	135	proc step_ten_loops { msg } {
	136	global gdb_prompt
	137
	138	for {set i 0} {[expr $i < 10]} {set i [expr $i + 1]} {
	139	send_gdb "step\n"
	140	set other_step 0
	141	gdb_expect {
	142	-re ".*myp\\) \\+\\+;\[\r\n\]+$gdb_prompt $" {
	143	pass "step to increment ($msg $i)"
	144	}
	145	-re "$gdb_prompt $" {
	146	if {$other_step == 0} {
	147	set other_step 1
	148	send_gdb "step\n"
	149	exp_continue
	150	} else {
	151	fail "step to increment ($msg $i)"
	152	# FIXME cascade?
	153	}
	154	}
	155	timeout {
	156	fail "step to increment ($msg $i) (timeout)"
	157	}
	158	}
	159	}
	160	}
	161
	162	# Start with a fresh gdb.
	163
	164	gdb_exit
	165	gdb_start
	166	gdb_reinitialize_dir $srcdir/$subdir
	167
	168	# We'll need this when we send_gdb a ^C to GDB. Need to do it before we
	169	# run the program and gdb starts saving and restoring tty states.
	170	# On Ultrix, we don't need it and it is really slow (because shell_escape
	171	# doesn't use vfork).
	172	if ![istarget "--ultrix*"] then {
	173	gdb_test "shell stty intr '^C'" ""
	174	}
	175
	176	gdb_load ${binfile}
	177
	178	gdb_test "set print sevenbit-strings" ""
	179	gdb_test "set width 0" ""
	180
	181	runto_main
	182
	183	# See if scheduler locking is available on this target.
	184	send_gdb "set scheduler-locking off\n"
	185	global gdb_prompt
	186	gdb_expect {
	187	-re "Target .* cannot support this command"
	188	{
	189	unsupported "target does not support scheduler locking"
	190	return
	191	}
	192	-re "$gdb_prompt $"
	193	{
	194	pass "scheduler locking set to none"
195	}
196	timeout
197	{
198	unsupported "target does not support scheduler locking (timeout)"
199	return
200	}
201	}
202
203	gdb_breakpoint [gdb_get_line_number "schedlock.exp: last thread start"]
204	gdb_continue_to_breakpoint "all threads started"
205
206	global list_count
207	set list_count 0
208
209	set start_args [get_args]
210
211	# First make sure that all threads are alive.
212	my_continue "initial"
213
214	set cont_args [get_args]
215
e09490f1	216	set bad 0
18ecae38	217	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c	218	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
e09490f1	219	incr bad
0312286c DJ	220	}
0312286c DJ	221	}
e09490f1	222	if { $bad == 0 } {
18ecae38 DJ	223	pass "all threads alive"
18ecae38 DJ	224	} else {
e09490f1	225	fail "all threads alive ($bad/$NUM did not run)"
18ecae38	226	}
0312286c DJ	227
	228	# We can't change threads, unfortunately, in current GDB. Use
	229	# whichever we stopped in.
	230	set curthread [get_current_thread "find current thread (1)"]
	231
	232
	233
	234
	235	# Test stepping without scheduler locking.
	236	gdb_test "set scheduler-locking off" ""
	237
	238	step_ten_loops "unlocked"
	239
	240	# Make sure we're still in the same thread.
	241	set newthread [get_current_thread "find current thread (2)"]
	242	if {$curthread == $newthread} {
	243	pass "step without lock does not change thread"
	244	} else {
	245	fail "step without lock does not change thread (switched to thread $newthread)"
	246	}
	247
	248	set start_args $cont_args
	249	set cont_args [get_args]
	250
a25fbfec	251	set num_other_threads 0
18ecae38	252	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	253	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	254	if {$i == $curthread} {
	255	fail "current thread stepped (didn't run)"
0312286c DJ	256	}
	257	} else {
	258	if {$i == $curthread} {
	259	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	260	pass "current thread stepped"
	261	} else {
	262	fail "current thread stepped (wrong amount)"
	263	}
	264	} else {
a25fbfec	265	set num_other_threads [expr $num_other_threads + 1]
0312286c DJ	266	}
	267	}
	268	}
a25fbfec	269	if {$num_other_threads > 0} {
18ecae38	270	pass "other threads ran - unlocked"
a25fbfec	271	} else {
18ecae38	272	fail "other threads ran - unlocked"
a25fbfec	273	}
0312286c DJ	274
	275	# Test continue with scheduler locking
	276	gdb_test "set scheduler-locking on" ""
	277
	278	my_continue "with lock"
	279
	280	# Make sure we're still in the same thread.
	281	set newthread [get_current_thread "find current thread (3)"]
	282	if {$curthread == $newthread} {
	283	pass "continue with lock does not change thread"
	284	} else {
	285	fail "continue with lock does not change thread (switched to thread $newthread)"
	286	}
	287
	288	set start_args $cont_args
	289	set cont_args [get_args]
	290
18ecae38 DJ	291	set num_other_threads 0
18ecae38 DJ	292	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	293	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	294	if {$i == $curthread} {
	295	fail "current thread ran (didn't run)"
0312286c DJ	296	}
	297	} else {
	298	if {$i == $curthread} {
	299	pass "current thread ran"
	300	} else {
18ecae38	301	incr num_other_threads
0312286c DJ	302	}
	303	}
	304	}
18ecae38 DJ	305	if {$num_other_threads > 0} {
	306	fail "other threads didn't run - locked"
	307	} else {
	308	pass "other threads didn't run - locked"
	309	}
0312286c DJ	310
	311	# Test stepping with scheduler locking
	312	step_ten_loops "locked"
	313
	314	# Make sure we're still in the same thread.
	315	set newthread [get_current_thread "find current thread (2)"]
	316	if {$curthread == $newthread} {
	317	pass "step with lock does not change thread"
	318	} else {
	319	fail "step with lock does not change thread (switched to thread $newthread)"
	320	}
	321
	322	set start_args $cont_args
	323	set cont_args [get_args]
	324
18ecae38 DJ	325	set num_other_threads 0
18ecae38 DJ	326	for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
0312286c DJ	327	if {[lindex $start_args $i] == [lindex $cont_args $i]} {
	328	if {$i == $curthread} {
	329	fail "current thread stepped locked (didn't run)"
0312286c DJ	330	}
	331	} else {
	332	if {$i == $curthread} {
	333	if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
	334	pass "current thread stepped locked"
	335	} else {
	336	fail "current thread stepped locked (wrong amount)"
	337	}
	338	} else {
18ecae38	339	incr num_other_threads
0312286c DJ	340	}
	341	}
	342	}
18ecae38 DJ	343	if {$num_other_threads > 0} {
	344	fail "other threads didn't run - step locked"
	345	} else {
	346	pass "other threads didn't run - step locked"
	347	}
0312286c DJ	348
0312286c DJ	349	return 0