| # Copyright (C) 2014-2019 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 |
| |
| # Probe for displaced stepping support. We're stopped at the main |
| # breakpoint. If displaced stepping is supported, we should see |
| # related debug output. |
| set displaced_stepping_enabled 0 |
| set msg "check displaced-stepping" |
| gdb_test_no_output "set debug displaced 1" |
| gdb_test_multiple "next" $msg { |
| -re "displaced pc to.*$gdb_prompt $" { |
| set displaced_stepping_enabled 1 |
| } |
| -re ".*$gdb_prompt $" { |
| } |
| } |
| gdb_test_no_output "set debug displaced 0" |
| |
| # 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 |
| } |
| |
| # Run command and wait for the prompt, without end anchor. |
| |
| proc gdb_test_no_anchor {cmd} { |
| global gdb_prompt |
| |
| gdb_test_multiple $cmd $cmd { |
| -re "$gdb_prompt " { |
| pass $cmd |
| } |
| } |
| } |
| |
| # Enable/disable debugging. |
| |
| proc enable_debug {enable} { |
| |
| # Comment out to debug problems with the test. |
| return |
| |
| gdb_test_no_anchor "set debug infrun $enable" |
| gdb_test_no_anchor "set debug displaced $enable" |
| } |
| |
| # The test proper. SIGNAL_THREAD is the thread that has been elected |
| # to receive the SIGUSR1 signal. |
| |
| proc test {signal_thread} { |
| global gdb_prompt |
| global NUM_THREADS |
| global timeout |
| global displaced_stepping_enabled |
| |
| with_test_prefix "signal_thread=$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 $i thread stepping" |
| } |
| |
| gdb_test "thread 1" "Switching to .*" \ |
| "switch to the main thread to queue signal" |
| |
| # Let the main thread queue the signal. |
| gdb_breakpoint "loop_broke" |
| |
| enable_debug 1 |
| |
| # On software single-step targets that don't support displaced |
| # stepping, threads keep hitting each others' single-step |
| # breakpoints, and then GDB needs to pause all threads to step |
| # past those. The end result is that progress in the main |
| # thread will be slower and it may take a bit longer for the |
| # signal to be queued; bump the timeout. |
| if {!$displaced_stepping_enabled && ![can_hardware_single_step]} { |
| # The more threads we have, the longer it takes. |
| set factor $NUM_THREADS |
| } else { |
| set factor 1 |
| } |
| with_timeout_factor $factor { |
| gdb_test "print timeout = $timeout" " = $timeout" \ |
| "set timeout in the inferior" |
| |
| set saw_continuing 0 |
| set test "continue &" |
| gdb_test_multiple $test $test { |
| -re "Continuing.\r\n" { |
| set saw_continuing 1 |
| exp_continue |
| } |
| -re "$gdb_prompt " { |
| gdb_assert $saw_continuing $test |
| } |
| -re "infrun:" { |
| exp_continue |
| } |
| } |
| |
| set gotit 0 |
| |
| # 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" |
| set gotit 0 |
| 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. |
| set gotit 1 |
| pass $test |
| } |
| -re "infrun:" { |
| exp_continue |
| } |
| } |
| if {!$gotit} { |
| break |
| } |
| } |
| } |
| |
| enable_debug 0 |
| |
| # It's helpful to have this in the log if the test ever |
| # happens to fail. |
| gdb_test "info threads" |
| |
| return $gotit |
| } |
| } |
| |
| # 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 } { |
| if {![test $i]} { |
| # Avoid cascading timeouts, and bail out. |
| return |
| } |
| } |