# Copyright 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/>.

standard_testfile .c
set executable ${testfile}

# The plain remote target can't do multiple inferiors.
if [use_gdb_stub] {
    return
}

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

# Inferior 1 stops at f1.

if ![runto f1] then {
    return 0
}

gdb_test "add-inferior -exec ${binfile}" \
    "Added inferior 2.*" \
    "add inferior 2 with -exec ${executable}"
gdb_test "inferior 2" "witching to inferior 2 .*" "switch to inferior 2"

delete_breakpoints

# Inferior 2 stops at f2.

if ![runto f2] then {
    return 0
}

gdb_breakpoint commonfun

# Check the stack bactrace in inferior INF.  PREFIX is the test
# message prefix.

proc check_bt { inf prefix } {
    with_test_prefix "$prefix" {
	gdb_test "bt 1" "#0  f$inf .*" "bt in inferior $inf"
    }
}

# Do inferior call commonfun () in inferior 2 and inferior 1, but
# finish it in inferior INF1 first and then inferior INF2.  Check
# the stack backtrace in each inferior is still correct after
# inferior call.

proc test { inf1 inf2 } {

    with_test_prefix "inf $inf1 first" {
	gdb_test "inferior 2" "witching to inferior 2 .*" \
	    "switch to inferior 2 (1)"
	check_bt 2 "before infcall"
	gdb_test "p commonfun()" "Breakpoint .*The program being debugged stopped while in a function called from GDB.*" "infcall in inferior 2"

	gdb_test "inferior 1" "witching to inferior 1 .*" \
	    "switch to inferior 1 (1)"
	check_bt 1 "before infcall"
	gdb_test "p commonfun()" "Breakpoint .*The program being debugged stopped while in a function called from GDB.*" "infcall in inferior 1"

	gdb_test "maintenance print dummy-frames" ": id={stack=.*}.*: id=.*" \
	    "two dummy frames"

	gdb_test "inferior $inf1" "witching to inferior $inf1 .*" \
	    "switch to inferior $inf1 (2)"
	gdb_test "finish" "Run till exit from #0  commonfun .*" \
	    "finish in inferior $inf1"
	check_bt $inf1 "after infcall"

	gdb_test "inferior $inf2" "witching to inferior $inf2 .*" \
	    "switch to inferior $inf2 (2)"
	gdb_test "finish" "Run till exit from #0  commonfun .*" \
	    "finish in inferior $inf2"
	check_bt $inf2 "after infcall"
    }
}

# Do the test in different orders.
test 1 2
test 2 1