# Copyright 2016-2021 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 -exec-run works as expected.  Exercises various testing
# axes:
#
# - MI running on main UI vs separate UI.
#
# - inferior tty set to main tty vs separate tty.
#
# - forking the child failing and sending output to the right inferior
#   terminal, vs the child not failing to start.

load_lib mi-support.exp
set MIFLAGS "-i=mi"

# The purpose of this testcase is to test the -exec-run command. If we
# cannot use it, then there is no point in running this testcase.
if [use_gdb_stub] {
     untested "cannot use -exec-run command"
     return -1
}

standard_testfile mi-start.c

if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
     untested "could not build mi-exec-run"
     return -1
}

# The test proper.  INFTTY_MODE determines whether "set inferior-tty"
# is in effect.  MI_MODE determines whether MI is run on the main UI,
# or as a separate UI.  FORCE_FAIL is true when we want -exec-run to
# fail and cause inferior output be sent to the inferior tty.

proc test {inftty_mode mi_mode force_fail} {
    global srcdir subdir binfile srcfile
    global gdb_spawn_id gdb_main_spawn_id mi_spawn_id inferior_spawn_id
    global decimal

    mi_gdb_exit

    set start_ops {}
    if {$inftty_mode == "separate"} {
	lappend start_ops "separate-inferior-tty"
    }
    if {$mi_mode == "separate"} {
	lappend start_ops "separate-mi-tty"
    }

    if [eval mi_gdb_start $start_ops] {
	return
    }

    if {$force_fail} {
	# Disable the shell so that its the first exec that fails,
	# instead of the shell starting and then failing with some
	# unspecified output.
	mi_gdb_test "-gdb-set startup-with-shell off" ".*"
	set bin $binfile.nox
    } else {
	set bin $binfile
    }

    mi_delete_breakpoints
    mi_gdb_reinitialize_dir $srcdir/$subdir
    mi_gdb_reinitialize_dir $srcdir/$subdir
    mi_gdb_load ${bin}

    # Useful for debugging:
    verbose -log "Channels:"
    verbose -log " inferior_spawn_id=$inferior_spawn_id"
    verbose -log " gdb_spawn_id=$gdb_spawn_id"
    verbose -log " gdb_main_spawn_id=$gdb_main_spawn_id"
    verbose -log " mi_spawn_id=$mi_spawn_id"

    if {$force_fail} {
	set saw_perm_error 0
	set saw_mi_error 0
	set test "run failure detected"
	send_gdb "-exec-run --start\n"

	while {1} {
	    gdb_expect {
		-i "$inferior_spawn_id"
		-re ".*Cannot exec.*Permission denied" {
		    set saw_perm_error 1
		    verbose -log "saw mi error"
		}
		-i "$gdb_spawn_id"
		-re "\\^error,msg=\"During startup program exited with code 127" {
		    set saw_mi_error 1
		    verbose -log "saw mi error"
		}
		timeout {
		    fail "$test (timeout)"
		    break
		}
		-i "$gdb_main_spawn_id"
		eof {
		    fail "$test (eof)"
		    break
		}
	    }

	    if {$saw_perm_error && $saw_mi_error} {
		pass $test
		break
	    }
	}
    } else {
	mi_run_cmd "--start"
	mi_expect_stop "breakpoint-hit" "main" "" ".*$srcfile" "$decimal" \
	    { "" "disp=\"del\"" } "breakpoint hit reported on mi"

	if {$mi_mode == "separate"} {
	    # Check that the breakpoint hit is reported on the main
	    # UI/CLI.  Note no prompt is expected.
	    switch_gdb_spawn_id $gdb_main_spawn_id

	    set test "breakpoint hit reported on console"
	    gdb_test_multiple "" $test {
		-re "Temporary breakpoint .*, main \\(\\) at .*$srcfile:$decimal.*return 0;" {
		    pass $test
		}
	    }

	    # Switch back to the MI UI.
	    global mi_spawn_id
	    switch_gdb_spawn_id $mi_spawn_id
	}
    }
}

# Create a not-executable copy of the program, in order to exercise
# vfork->exec failing.
gdb_remote_download host $binfile $binfile.nox
remote_spawn target "chmod \"a-x\" $binfile.nox"

foreach_with_prefix inferior-tty {"main" "separate"} {
    foreach_with_prefix mi {"main" "separate"} {
	foreach_with_prefix force-fail {0 1} {
	    test ${inferior-tty} ${mi} ${force-fail}
	}
    }
}