binutils-gdb/gdb/testsuite/gdb.threads/schedlock.exp

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# Copyright (C) 1996, 1997, 2002, 2003, 2007, 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 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 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 ", (\[0-9\]+)"
}
gdb_test_multiple "print args" "listed args ($list_count)" {
-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 $result
}
}
}
proc stop_process { description } {
global gdb_prompt
# For this to work we must be sure to consume the "Continuing."
# message first, or GDB's signal handler may not be in place.
after 1000 {send_gdb "\003"}
gdb_expect {
-re "Program received signal SIGINT.*$gdb_prompt $"
{
pass $description
}
timeout
{
fail "$description (timeout)"
}
}
}
proc get_current_thread { description } {
global gdb_prompt
gdb_test_multiple "bt" "$description" {
-re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $" {
pass $description
return $expect_out(1,string)
}
}
return ""
}
proc my_continue { msg } {
gdb_test_multiple "continue" "continuing ($msg)" {
-re "Continuing" {
pass "continue ($msg)"
}
}
stop_process "stop all threads ($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 $i + 1]} {
set other_step 0
gdb_test_multiple "step" "step to increment ($msg $i)" {
-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?
}
}
}
}
}
# 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 ${binfile}
gdb_test_no_output "set print sevenbit-strings"
gdb_test_no_output "set width 0"
runto_main
# See if scheduler locking is available on this target.
global gdb_prompt
gdb_test_multiple "set scheduler-locking off" "scheduler locking set to none" {
-re "Target .* cannot support this command" {
unsupported "target does not support scheduler locking"
return
}
-re "$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/$NUM did not run)"
}
# We can't change threads, unfortunately, in current GDB. Use
# whichever we stopped in.
set curthread [get_current_thread "find current thread (1)"]
# Test stepping without scheduler locking.
gdb_test_no_output "set scheduler-locking off"
step_ten_loops "unlocked"
# Make sure we're still in the same thread.
set newthread [get_current_thread "find current thread (2)"]
if {$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