316 lines
8 KiB
Text
316 lines
8 KiB
Text
# Copyright (C) 1996-2015 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 <http://www.gnu.org/licenses/>.
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# This file was written by Daniel Jacobowitz <drow@mvista.com>
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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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standard_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 debug] != "" } {
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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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# Get the current contents of the `args` array in the test program.
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# Description is appended to the test message.
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proc get_args { description } {
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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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set test "listed args ($description)"
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gdb_test_multiple "print args" $test {
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-re "\\\$\[0-9\]+ = {$pattern}.*$gdb_prompt $" {
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pass $test
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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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set test "find current thread ($description)"
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gdb_test_multiple "bt" $test {
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-re "thread_function \\(arg=0x(\[0-9\])\\).*$gdb_prompt $" {
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pass $test
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return $expect_out(1,string)
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}
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}
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return ""
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}
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# Make sure we're stopped in the loop, in one of the non-main threads.
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proc goto_loop { msg } {
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gdb_breakpoint [concat [gdb_get_line_number "schedlock.exp: main loop"] " if arg != 0"]
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set test "return to loop"
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if {$msg != ""} {
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set test "$test ($msg)"
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}
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gdb_continue_to_breakpoint $test
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delete_breakpoints
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}
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proc my_continue { msg } {
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set test "continue ($msg)"
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gdb_test_multiple "continue" $test {
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-re "Continuing" {
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pass $test
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}
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}
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stop_process "stop all threads ($msg)"
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goto_loop $msg
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}
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# Use CMD to step the loop 10 times. CMD may be "step" or "next".
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proc step_ten_loops { cmd } {
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global gdb_prompt
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for {set i 0} {[expr $i < 10]} {set i [expr $i + 1]} {
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set other_step 0
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set test "$cmd to increment ($i)"
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gdb_test_multiple $cmd $test {
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-re ".*myp\\) \\+\\+;\[\r\n\]+$gdb_prompt $" {
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pass $test
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}
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-re "$gdb_prompt $" {
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if {$other_step == 0} {
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set other_step 1
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send_gdb "$cmd\n"
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exp_continue
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} else {
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fail $test
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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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gdb_test "shell stty intr '^C'" ".*"
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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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set start_args [get_args "before initial"]
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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 "after initial"]
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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/$NUM did not run)"
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}
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# Compare the previous thread and args with the current thread and
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# args. Check that we didn't switch threads, and that the threads
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# incremented their args counter the amounts expected. CMD is the
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# command being tested. BEFORE_THREAD is the thread that was selected
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# before the command was run. BEFORE_ARGS is the value of the
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# thread's args before the command was run. LOCKED indicates whether
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# we expect threads other than the selected thread remained locked.
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proc check_result { cmd before_thread before_args locked } {
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global NUM
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# Make sure we're still in the same thread.
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set newthread [get_current_thread "after"]
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set test "$cmd does not change thread"
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if {$before_thread == $newthread} {
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pass "$test"
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} else {
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fail "$test (switched to thread $newthread)"
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}
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set after_args [get_args "after"]
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set test "current thread advanced"
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if { $locked } {
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set test "$test - locked"
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} else {
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set test "$test - unlocked"
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}
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set num_other_threads 0
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for {set i 0} {$i < $NUM} {incr i} {
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if {[lindex $before_args $i] == [lindex $after_args $i]} {
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if {$i == $before_thread} {
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fail "$test (didn't run)"
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}
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} else {
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if {$i == $before_thread} {
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if {$cmd == "continue"
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|| [lindex $before_args $i] == [expr [lindex $after_args $i] - 10]} {
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pass "$test"
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} else {
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fail "$test (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 { $locked } {
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gdb_assert {$num_other_threads == 0} "other threads didn't run - locked"
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} else {
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gdb_assert {$num_other_threads > 0} "other threads ran - unlocked"
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}
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}
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with_test_prefix "schedlock=on: cmd=continue" {
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# Use whichever we stopped in.
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set curthread [get_current_thread "before"]
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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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check_result "continue" $curthread $cont_args 1
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}
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# Test stepping/nexting with different modes of scheduler locking.
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proc test_step { schedlock cmd call_function } {
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global NUM
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gdb_test_no_output "set scheduler-locking off"
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goto_loop ""
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set curthread [get_current_thread "before"]
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# No need to set to off again. This avoids a duplicate message.
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if {$schedlock != "off"} {
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gdb_test_no_output "set scheduler-locking $schedlock"
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}
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gdb_test "print call_function = $call_function" \
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" = $call_function"
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set before_args [get_args "before"]
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step_ten_loops $cmd
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# "next" lets other threads run while stepping over functions.
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if { $schedlock == "on" || ($schedlock == "step" && !$call_function) } {
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set locked 1
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} else {
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set locked 0
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}
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check_result $cmd $curthread $before_args $locked
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}
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# Test stepping/nexting with different modes of scheduler locking.
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foreach schedlock {"off" "step" "on"} {
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with_test_prefix "schedlock=$schedlock" {
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with_test_prefix "cmd=step" {
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test_step $schedlock "step" 0
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}
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with_test_prefix "cmd=next" {
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# With "next", and schedlock "step", threads run unlocked
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# when stepping over a function call. This exercises both
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# with and without a function call. Without a function
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# call "next" should behave just like "step".
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foreach call_function {0 1} {
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with_test_prefix "call_function=$call_function" {
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test_step $schedlock "next" $call_function
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}
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}
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}
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}
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}
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