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jeremybenn |
# Copyright (C) 1996, 1997, 2002, 2003, 2007, 2008, 2009, 2010
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# Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see .
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# This file was written by Daniel Jacobowitz
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# (parts based on pthreads.exp by Fred Fish (fnf@cygnus.com).
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#
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# This test covers the various forms of "set scheduler-locking".
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if $tracelevel then {
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strace $tracelevel
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}
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set testfile "schedlock"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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# The number of threads, including the main thread.
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set NUM 2
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if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
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return -1
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}
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# Now we can proceed with the real testing.
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proc get_args { } {
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global list_count
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global gdb_prompt
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global NUM
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set pattern "(\[0-9\]+)"
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for {set i 1} {[expr $i < $NUM]} {incr i} {
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append pattern ", (\[0-9\]+)"
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}
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gdb_test_multiple "print args" "listed args ($list_count)" {
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-re "\\\$\[0-9\]+ = {$pattern}.*$gdb_prompt $" {
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set list_count [expr $list_count + 1]
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pass "listed args ($list_count)"
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set result ""
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for {set i 1} {[expr $i <= $NUM]} {incr i} {
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lappend result $expect_out($i,string)
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}
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return $result
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}
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}
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}
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proc stop_process { description } {
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global gdb_prompt
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# For this to work we must be sure to consume the "Continuing."
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# message first, or GDB's signal handler may not be in place.
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after 1000 {send_gdb "\003"}
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gdb_expect {
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-re "Program received signal SIGINT.*$gdb_prompt $"
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{
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pass $description
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}
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timeout
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{
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fail "$description (timeout)"
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}
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}
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}
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proc get_current_thread { description } {
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global gdb_prompt
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gdb_test_multiple "bt" "$description" {
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-re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $" {
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pass $description
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return $expect_out(1,string)
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}
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}
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return ""
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}
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proc my_continue { msg } {
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gdb_test_multiple "continue" "continuing ($msg)" {
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-re "Continuing" {
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pass "continue ($msg)"
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}
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}
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stop_process "stop all threads ($msg)"
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# Make sure we're in one of the non-main looping threads.
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gdb_breakpoint [concat [gdb_get_line_number "schedlock.exp: main loop"] " if arg != 0"]
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gdb_continue_to_breakpoint "return to loop ($msg)"
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delete_breakpoints
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}
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proc step_ten_loops { msg } {
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global gdb_prompt
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for {set i 0} {[expr $i < 10]} {set i [expr $i + 1]} {
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set other_step 0
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gdb_test_multiple "step" "step to increment ($msg $i)" {
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-re ".*myp\\) \\+\\+;\[\r\n\]+$gdb_prompt $" {
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pass "step to increment ($msg $i)"
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}
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-re "$gdb_prompt $" {
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if {$other_step == 0} {
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set other_step 1
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send_gdb "step\n"
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exp_continue
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} else {
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fail "step to increment ($msg $i)"
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# FIXME cascade?
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}
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}
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}
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}
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}
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# Start with a fresh gdb.
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gdb_exit
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gdb_start
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gdb_reinitialize_dir $srcdir/$subdir
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# We'll need this when we send_gdb a ^C to GDB. Need to do it before we
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# run the program and gdb starts saving and restoring tty states.
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# On Ultrix, we don't need it and it is really slow (because shell_escape
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# doesn't use vfork).
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if ![istarget "*-*-ultrix*"] then {
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gdb_test "shell stty intr '^C'" ".*"
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}
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gdb_load ${binfile}
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gdb_test_no_output "set print sevenbit-strings"
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gdb_test_no_output "set width 0"
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runto_main
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# See if scheduler locking is available on this target.
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global gdb_prompt
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gdb_test_multiple "set scheduler-locking off" "scheduler locking set to none" {
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-re "Target .* cannot support this command" {
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unsupported "target does not support scheduler locking"
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return
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}
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-re "$gdb_prompt $" {
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pass "scheduler locking set to none"
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}
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timeout {
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unsupported "target does not support scheduler locking (timeout)"
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return
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}
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}
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gdb_breakpoint [gdb_get_line_number "schedlock.exp: last thread start"]
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gdb_continue_to_breakpoint "all threads started"
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global list_count
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set list_count 0
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set start_args [get_args]
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# First make sure that all threads are alive.
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my_continue "initial"
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set cont_args [get_args]
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set bad 0
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for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
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if {[lindex $start_args $i] == [lindex $cont_args $i]} {
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incr bad
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}
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}
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if { $bad == 0 } {
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pass "all threads alive"
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} else {
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fail "all threads alive ($bad/$NUM did not run)"
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}
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# We can't change threads, unfortunately, in current GDB. Use
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# whichever we stopped in.
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set curthread [get_current_thread "find current thread (1)"]
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# Test stepping without scheduler locking.
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gdb_test_no_output "set scheduler-locking off"
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step_ten_loops "unlocked"
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# Make sure we're still in the same thread.
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set newthread [get_current_thread "find current thread (2)"]
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if {$curthread == $newthread} {
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pass "step without lock does not change thread"
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} else {
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fail "step without lock does not change thread (switched to thread $newthread)"
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}
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set start_args $cont_args
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set cont_args [get_args]
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set num_other_threads 0
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for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
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if {[lindex $start_args $i] == [lindex $cont_args $i]} {
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if {$i == $curthread} {
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fail "current thread stepped (didn't run)"
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}
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} else {
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if {$i == $curthread} {
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if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
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pass "current thread stepped"
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} else {
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fail "current thread stepped (wrong amount)"
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}
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} else {
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set num_other_threads [expr $num_other_threads + 1]
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}
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}
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}
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if {$num_other_threads > 0} {
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pass "other threads ran - unlocked"
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} else {
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fail "other threads ran - unlocked"
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}
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# Test continue with scheduler locking
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gdb_test "set scheduler-locking on" ""
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my_continue "with lock"
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# Make sure we're still in the same thread.
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set newthread [get_current_thread "find current thread (3)"]
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if {$curthread == $newthread} {
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pass "continue with lock does not change thread"
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} else {
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fail "continue with lock does not change thread (switched to thread $newthread)"
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}
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set start_args $cont_args
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set cont_args [get_args]
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set num_other_threads 0
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for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
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if {[lindex $start_args $i] == [lindex $cont_args $i]} {
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if {$i == $curthread} {
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fail "current thread ran (didn't run)"
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}
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} else {
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if {$i == $curthread} {
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pass "current thread ran"
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} else {
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incr num_other_threads
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}
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}
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}
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if {$num_other_threads > 0} {
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fail "other threads didn't run - locked"
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} else {
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pass "other threads didn't run - locked"
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}
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# Test stepping with scheduler locking
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step_ten_loops "locked"
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# Make sure we're still in the same thread.
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set newthread [get_current_thread "find current thread (2)"]
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if {$curthread == $newthread} {
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pass "step with lock does not change thread"
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} else {
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fail "step with lock does not change thread (switched to thread $newthread)"
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}
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set start_args $cont_args
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set cont_args [get_args]
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set num_other_threads 0
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for {set i 0} {[expr $i < $NUM]} {set i [expr $i + 1]} {
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if {[lindex $start_args $i] == [lindex $cont_args $i]} {
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if {$i == $curthread} {
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fail "current thread stepped locked (didn't run)"
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}
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} else {
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if {$i == $curthread} {
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if {[lindex $start_args $i] == [expr [lindex $cont_args $i] - 10]} {
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pass "current thread stepped locked"
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} else {
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fail "current thread stepped locked (wrong amount)"
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}
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} else {
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incr num_other_threads
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}
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}
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}
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if {$num_other_threads > 0} {
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fail "other threads didn't run - step locked"
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} else {
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pass "other threads didn't run - step locked"
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}
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return 0
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