gdb/testsuite/gdb.threads/multiple-step-overs.exp

# Copyright (C) 2011-2021 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 steps over all breakpoints of threads not the stepping
# thread, before actually proceeding with the stepped thread.

standard_testfile
set executable ${testfile}

if [target_info exists gdb,nosignals] {
    verbose "Skipping ${testfile}.exp because of nosignals."
    return -1
}

if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
	 executable [list debug "incdir=${objdir}"]] != "" } {
    return -1
}

# Prepare environment for test.

proc setup {} {
    global executable
    global displaced

    with_test_prefix "setup" {
	clean_restart $executable

	if ![runto_main] {
	    return -1
	}

	gdb_test_no_output "set displaced-stepping $displaced"

	gdb_breakpoint [gdb_get_line_number "set wait-threads breakpoint here"]
	gdb_continue_to_breakpoint "run to breakpoint"
	gdb_test "info threads" "\\\* 1 .* 2 .* 3 .*" "info threads shows all threads"

	gdb_test_no_output "set scheduler-locking on"

	gdb_breakpoint [gdb_get_line_number "set breakpoint thread 3 here"]
	gdb_breakpoint [gdb_get_line_number "set breakpoint thread 2 here"]

	gdb_test "thread 3" "Switching.*"
	gdb_continue_to_breakpoint "run to breakpoint in thread 3"
	gdb_test "p *myp = 0" " = 0" "unbreak loop in thread 3"

	gdb_test "thread 2" "Switching.*"
	gdb_continue_to_breakpoint "run to breakpoint in thread 2"
	gdb_test "p *myp = 0" " = 0" "unbreak loop in thread 2"

	# Disable scheduler locking.
	gdb_test_no_output "set scheduler-locking off"

	# Now all 3 threads are stopped for a breakpoint that needs to
	# be stepped over before thread 1 is resumed.
    }
}

foreach displaced { "off" "on" } {
    with_test_prefix "displaced=$displaced" {
	with_test_prefix "step" {
	    setup
	    gdb_test "thread 1" "Switching.*"
	    gdb_test "step" "in wait_threads .*"
	}

	with_test_prefix "next" {
	    setup
	    gdb_test "thread 1" "Switching.*"
	    gdb_test "next" "pthread_join.*"
	}

	with_test_prefix "continue" {
	    setup
	    gdb_breakpoint [gdb_get_line_number "EXIT_SUCCESS"]
	    gdb_test "thread 1" "Switching.*"
	    gdb_test "continue" "EXIT_SUCCESS.*"
	}

	# Try continuing with a queued signal in each of the threads
	# (one at a time).  Should stop at the signal handler, instead
	# of re-trapping the breakpoint the threads were already
	# stopped at.
	foreach thread {1 2 3} {
	    with_test_prefix "signal thr$thread" {
		setup

		# Queue a signal in THREAD.
		gdb_test "thread $thread" "Switching.*"
		gdb_test_no_output "queue-signal SIGUSR1"

		# Switch back to thread 1, and continue.
		gdb_test "thread 1" "Switching.*" "switch back to thread 1"
		gdb_breakpoint "sigusr1_handler" "set break at sigusr1_handler"

		set msg "continue to sigusr1_handler"
		gdb_test_multiple "continue" $msg {
		    -re "Breakpoint .* sigusr1_handler .*$gdb_prompt $" {
			pass $msg
		    }
		    -re "Breakpoint .*$gdb_prompt $" {
			if {![can_single_step_to_signal_handler]
			    && $thread != 1 && $displaced == "off"} {
			    setup_kfail "gdb/18214" "*-*-*"
			}
			fail $msg
		    }
		}
	    }
	}
    }
}