gdb/testsuite/gdb.threads/threads-after-exec.exp

# Copyright 2023-2024 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 after an exec of a non-leader thread, we don't leave the
# non-leader thread listed in internal thread lists, causing problems.

standard_testfile .c

proc do_test { } {
    if [prepare_for_testing "failed to prepare" $::testfile $::srcfile {debug pthreads}] {
	return -1
    }

    if ![runto_main] {
	return
    }

    gdb_test "catch exec" "Catchpoint $::decimal \\(exec\\)"

    gdb_test "continue" "Catchpoint $::decimal .*" "continue until exec"

    # Confirm we only have one thread in the thread list.
    gdb_test "p \$_inferior_thread_count" " = 1"

    # Get the post-exec thread number.  Due to PR gdb/31069 ("Zombie
    # leader detection racy") this isn't always thread 1.1.
    set cur_thr [get_integer_valueof "\$_thread" 0]

    if {[istarget *-*-linux*] && [gdb_protocol_is_native]} {
	# Confirm there's only one LWP in the list as well, and that
	# it is bound to the existing GDB thread.
	set inf_pid [get_inferior_pid]
	gdb_test_multiple "maint info linux-lwps" "" {
	    -wrap -re "Thread ID *\r\n$inf_pid\.$inf_pid\.0\[ \t\]+1\.$cur_thr *" {
		pass $gdb_test_name
	    }
	}
    }

    # Test that GDB is able to kill the inferior.  This used to crash
    # on native Linux as GDB did not dispose of the pre-exec LWP for
    # the non-leader (and that LWP did not have a matching thread in
    # the core thread list).
    gdb_test "with confirm off -- kill" \
	"\\\[Inferior 1 (.*) killed\\\]" \
	"kill inferior"
}

do_test