# Copyright 1988-2020 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/>.

# This file was written by Rob Savoye. (rob@cygnus.com)

load_lib selftest-support.exp

proc test_with_self { } {
    global gdb_prompt
    global decimal
    global timeout
    global inferior_spawn_id

    # When GDB is built as a C++ program, disassemble shows the full
    # prototype.
    set cxx_main_args_re [string_to_regexp "(int, char**)"]

    # disassemble yourself
    gdb_test "x/10i main" \
	    "x/10i.*main.*main($cxx_main_args_re)?.$decimal.*main($cxx_main_args_re)?.$decimal.*" \
	    "disassemble main"

    # We'll need this when we send a ^C to GDB.  Need to do it before we
    # run the program and gdb starts saving and restoring tty states.
    gdb_test "shell stty intr '^C'" ".*" \
	"set interrupt character in test_with_self"

    # FIXME: If we put this after the run to main, the first list
    # command doesn't print the same line as the current line where
    # gdb is stopped.
    gdb_test_no_output "set listsize 1" "set listsize to 1"

    # do we have a version number ?
    gdb_test_multiple "print version" "printed version" {
	-re ".\[0-9\]+ = .\[0-9.\]+.*$gdb_prompt $" {
	    pass "printed version as string"
	}
	-re ".\[0-9\]+ = +0x.*\[0-9.\]+.*$gdb_prompt $" {
	    pass "printed version as pointer"
	}
	-re ".\[0-9\]+ = +.+ +0x.*\[0-9.\]+.*$gdb_prompt $" {
	    pass "printed version with cast"
	}
    }

    # start the "xgdb" process
    if [target_info exists gdb,noinferiorio] {
	# With no way to interact with the inferior GDB, all we can do
	# is let it run.
	send_gdb "continue\n"
	# Wait a bit while the inferior gdb gets to its prompt.
	sleep 1
    } else {
	set banner [multi_line \
			"GNU gdb \[0-9\.\]*\[^\r\n\]*" \
			"Copyright \\(C\\) \[0-9\]* Free Software Foundation, Inc\." \
			"License GPLv3\\+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>" \
			"This is free software: you are free to change and redistribute it\." \
			"There is NO WARRANTY, to the extent permitted by law\." \
			"Type \"show copying\" and \"show warranty\" for details\." \
			"This GDB was configured as .*" \
			"$gdb_prompt $"]
	set test "xgdb is at prompt"
	gdb_test_multiple "continue" $test {
	    -i "$inferior_spawn_id"
	    -re "$banner" {
		pass $test
	    }
	}

	# set xgdb prompt so we can tell which is which
	send_inferior "set prompt (xgdb) \n"
	set msg "Set xgdb_prompt"
	gdb_test_multiple "" $msg {
	    -i "$inferior_spawn_id"
	    -re "\[(\]xgdb\[)\].*\[(\]xgdb\[)\] $" {
		pass $msg
	    }
	}
    }

    # kill the xgdb process
    if ![target_info exists gdb,nointerrupts] {
	set description "send ^C to child process"
	send_gdb "\003"
	# "Thread 1" is displayed iff Guile support is linked in.
	gdb_expect {
	    -re "(Thread .*|Program) received signal SIGINT.*$gdb_prompt $" {
		pass "$description"
	    }
	    -re ".*$gdb_prompt $" {
		fail "$description"
	    }
	    timeout {
		fail "$description (timeout)"
	    }
	}
    }
    
    set description "send SIGINT signal to child process"
    gdb_test_multiple "signal SIGINT" "$description" {
	-re "^signal SIGINT\r\nContinuing with signal SIGINT.\r\nQuit\r\n.* $" {
	    pass "$description"
	}
    }

    set description "send ^C to child process again"
    send_gdb "\003"
    gdb_expect {
	-re "(Thread .*|Program) received signal SIGINT.*$gdb_prompt $" {
	    pass "$description"
	}
	-re ".*$gdb_prompt $" {
	    fail "$description"
	}
	timeout {
	    fail "$description (timeout)"
	}
    }


    # Switch back to the GDB thread if Guile support is linked in.
    # "signal SIGINT" could also switch the current thread.
    gdb_test "thread 1" {\[Switching to thread 1 .*\].*}
    
    # get a stack trace
    #
    # This fails on some linux systems for unknown reasons.  On the
    # systems where it fails, sometimes it works fine when run manually.
    # The testsuite failures may not be limited to just aout systems.
    setup_xfail "i*86-pc-linuxaout-gnu"
    set description "backtrace through signal handler"
    gdb_test_multiple "backtrace" "$description" {
	-re "#0.*(read|poll).*in main \\(.*\\) at .*gdb\\.c.*$gdb_prompt $" {
	    pass "$description"
	}
    }

    # Restart gdb in case next test expects it to be started already.
    return 0
}

do_self_tests captured_main test_with_self