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# Copyright (C) 2014-2015 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/>.
# Test that GDB in non-stop mode gives roughly equal priority to
# events of all threads.
standard_testfile
set executable ${testfile}
if [target_info exists gdb,nosignals] {
verbose "Skipping ${testfile}.exp because of nosignals."
return -1
}
set options { "additional_flags=-DTIMEOUT=$timeout" debug pthreads }
if {[prepare_for_testing "failed to prepare" $testfile $srcfile $options] == -1} {
return -1
}
gdb_test_no_output "set non-stop on"
if ![runto_main] {
return -1
}
# We want "handle print", to make sure the target backend reports the
# signal to the run control core.
gdb_test "handle SIGUSR1 print nostop pass" ""
# Get current value of VAR from the inferior. TEST is used as test
# message.
proc get_value {var test} {
global expect_out
global gdb_prompt
global decimal
set value -1
gdb_test_multiple "print $var" "$test" {
-re ".*= ($decimal).*\r\n$gdb_prompt $" {
set value $expect_out(1,string)
pass "$test"
}
}
return ${value}
}
set NUM_THREADS [get_value "num_threads" "get num_threads"]
# Account for the main thread.
incr NUM_THREADS
# Run threads to their start positions. This prepares for a new test
# sequence.
proc restart {} {
global gdb_prompt
global NUM_THREADS
delete_breakpoints
gdb_test "print got_sig = 0" " = 0"
gdb_breakpoint [gdb_get_line_number "set thread breakpoint here"]
gdb_breakpoint [gdb_get_line_number "set kill breakpoint here"]
set test "continue -a&"
gdb_test_multiple $test $test {
-re "Continuing.\r\n$gdb_prompt " {
pass $test
}
}
for {set i 1} { $i <= $NUM_THREADS } { incr i } {
set test "thread $i restarted"
gdb_test_multiple "" $test {
-re "breakpoint here" {
# The prompt was already matched in the "continue &"
# test above. We're now consuming asynchronous output
# that comes after the prompt.
pass $test
}
}
}
delete_breakpoints
}
# The test proper. SIGNAL_THREAD is the thread that has been elected
# to receive the SIGUSR1 signal.
proc test {signal_thread} {
global gdb_prompt
global NUM_THREADS
with_test_prefix "signal_thread=$signal_thread" {
restart
# Set all threads stepping the infinite loop line in parallel.
for {set i 2} { $i <= $NUM_THREADS } { incr i } {
gdb_test "thread $i" \
"child_function.*set thread breakpoint here.*" \
"switch to thread $i to step it"
if {$i == $signal_thread} {
gdb_test "print signal_thread = self" " = .*"
}
gdb_test "step&" "" "set $i thread stepping"
}
gdb_test "thread 1" "Switching to .*" \
"switch to the main thread to queue signal"
# Let the main thread queue the signal.
gdb_breakpoint "loop_broke"
set test "continue &"
gdb_test_multiple $test $test {
-re "Continuing.\r\n$gdb_prompt " {
pass $test
}
}
# Wait for all threads to finish their steps, and for the main
# thread to hit the breakpoint.
for {set i 1} { $i <= $NUM_THREADS } { incr i } {
set test "thread $i broke out of loop"
gdb_test_multiple "" $test {
-re "loop_broke" {
# The prompt was already matched in the "continue
# &" test above. We're now consuming asynchronous
# output that comes after the prompt.
pass $test
}
}
}
# It's helpful to have this in the log if the test ever
# happens to fail.
gdb_test "info threads"
}
}
# The kernel/debug API may always walk its thread list looking for the
# first with an event, resulting in giving priority to e.g. the thread
# with lowest kernel thread ID. So test once with the signal pending
# in each thread, except the main thread.
for {set i 2} { $i <= $NUM_THREADS } { incr i } {
test $i
}
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