# Copyright 2009-2020 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 when a thread other than the main thread execs, we follow
# through to the new incarnation of the main thread, even if the main
# thread had already exited before the exec.

standard_testfile
set executable ${testfile}

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

proc do_test { lock_sched nonstop } {
    with_test_prefix "lock-sched=$lock_sched,non-stop=$nonstop" {
	global executable

	save_vars { GDBFLAGS } {
	  append GDBFLAGS " -ex \"set non-stop $nonstop\""
	  clean_restart ${executable}
	}

	if ![runto_main] {
	    return -1
	}

	gdb_breakpoint [gdb_get_line_number "break-here"]
	gdb_continue_to_breakpoint "break-here" ".* break-here .*"

	if { $nonstop == "on" } {
	    gdb_test "thread 2" "Switching.*"
	}

	gdb_test "info threads" \
	    "\r\n\[ \t\]*Id\[ \t\]+Target\[ \t\]+Id\[ \t\]+Frame\[ \t\]*\r\n\\* 2 *Thread \[^\r\n\]* at \[^\r\n\]*" \
	    "single thread left"

	# Also test with sched-lock to make sure we can follow the
	# non-leader thread execing even though the main thread wasn't
	# resumed before the exec.
	if { $lock_sched } {
	    gdb_test_no_output "set scheduler-locking on"
	}

	gdb_test "continue" \
	    ".*is executing new program.*Breakpoint 1, main.* at .*" \
	    "continue over exec"
    }
}

foreach nonstop {"on" "off"} {
  foreach schedlock {"on" "off"} {
    if {$schedlock == "on" && $nonstop == "on"} {
      # Schedule locking has no effect in nonstop mode.
      continue
    }
    do_test $schedlock $nonstop
  }
}