gdb/testsuite/gdb.threads/signal-sigtrap.exp

# Copyright (C) 2014-2021 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/>.  */

# Check that GDB doesn't forget to pass SIGTRAP to the program when
# the user explicitly passes it with the signal command.

standard_testfile

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

if {[build_executable "failed to prepare" $testfile $srcfile \
	 {debug pthreads}]} {
    return -1
}

# Run test proper.  SIGTRAP_THREAD is the thread that should get the
# SIGTRAP.

proc test { sigtrap_thread } {
    global srcfile binfile

    with_test_prefix "sigtrap thread $sigtrap_thread" {
	clean_restart ${binfile}

	if ![runto "thread_function"] then {
	    return 0
	}

	set pattern "\\\* 2\[ \t\]+Thread.*"
	gdb_test "info threads" $pattern "thread 2 hit breakpoint"

	gdb_test "break sigtrap_handler" "Breakpoint .* at .*$srcfile.*"

	# Thread 2 is stopped at a breakpoint, which must be stepped
	# over first.  Thus if this is thread 1, then GDB will first
	# switch back to thread 2 to step it over the breakpoint.
	gdb_test "thread $sigtrap_thread" \
	    "Switching to thread $sigtrap_thread.*" \
	    "switch to sigtrap thread"

	gdb_test "signal SIGTRAP" \
	    "Continuing with signal SIGTRAP.*Breakpoint .* sigtrap_handler .*" \
	    "signal SIGTRAP reaches handler"

	set pattern "\\\* $sigtrap_thread\[ \t\]+Thread.*"
	gdb_test "info threads" $pattern "right thread got the signal"
    }
}

foreach sigtrap_thread {1 2} {
    test $sigtrap_thread
}