gdb/testsuite/gdb.base/hook-stop.exp

# 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/>.

standard_testfile

if { [build_executable ${testfile}.exp "${testfile}" $srcfile {debug nowarnings}] } {
    return -1
}

# Define the hook-stop that runs COMMANDS.

proc define_hook_stop {commands} {
    set test "define hook-stop command"
    gdb_test_multiple "define hook-stop" "$test" {
	-re "Type commands for definition of \"hook-stop\".\r\nEnd with a line saying just \"end\".\r\n>$" {
	    gdb_test "$commands\nend" "" "$test"
	}
    }
}

# Restart GDB, run to main, set a breakpoint, and define a hook-stop
# that runs COMMANDS.  If running to main fails, this returns to the
# caller's caller directly.

proc setup {commands} {
    global srcfile binfile

    clean_restart $binfile

    if ![runto_main] then {
	fail "can't run to main"
	return -code return
    }

    gdb_test "break func" \
	"Breakpoint.*at.* file .*$srcfile.*\\." \
	"breakpoint line number"

    define_hook_stop $commands
}

# Check that the hook-stop runs before the frame is printed.

proc hook_stop_before_frame {} {
    with_test_prefix "hook-stop runs before frame print" {
	global gdb_prompt

	setup "echo \"Hello.\""

	set test "run hook-stop"
	gdb_test_multiple "continue" "$test" {
	    -re "\"Hello\\.\"\r\nBreakpo.*func.*set breakpoint here.*${gdb_prompt} $" {
		pass $test
	    }

	    -re "Breakpo.*func.*set breakpoint here.*\"Hello\\.\".*${gdb_prompt} $" {
		fail $test
	    }
	}
    }
}

# Check that GDB gracefully handles the case of the inferior dying
# while running the hook-stop.

proc hook_stop_kill {} {
    with_test_prefix "hook-stop kills inferior" {
	global gdb_prompt
	global decimal

	setup "kill"

	gdb_test_no_output "set confirm off"

	set test "run hook-stop"
	gdb_test_multiple "continue" "$test" {
	    -re "Continuing.\r\n\\\[Inferior $decimal \\(.*\\) killed\\\]\r\n${gdb_prompt} $" {
		pass $test
	    }
	}

	gdb_test "info threads" "No threads.*"
    }
}

# Check that GDB gracefully handles the case of the hook-stop
# continuing the inferior in the foreground.

proc hook_stop_continue_fg {} {
    with_test_prefix "hook-stop runs continue" {
	global gdb_prompt

	setup "if \$do_continue\nset \$do_continue = 0\ncontinue\nend"

	gdb_test "print \$do_continue = 1" " = 1"

	gdb_test "next" "Breakpoint.*func \\(\\) at .*set breakpoint here \\*/" \
	    "next triggering hook-stop"

	gdb_test "next" "a = 2;" "next no hook-stop"
    }
}

# Check that GDB gracefully handles the case of the hook-stop
# continuing the inferior in the background.

proc hook_stop_continue_bg {} {
    with_test_prefix "hook-stop runs continue&" {
	global gdb_prompt

	setup "if \$do_continue\nset \$do_continue = 0\ncontinue&\nend"

	gdb_test "print \$do_continue = 1" " = 1"

	set test "run hook-stop"
	gdb_test_multiple "continue" "$test" {
	    -re "Continuing.\r\n.*${gdb_prompt} " {
		pass $test
	    }
	}

	set test "inferior exits normally"
	gdb_test_multiple "" "$test" {
	    -re "exited normally" {
		pass $test
	    }
	}
	gdb_test "info threads" "No threads.*"
    }
}

# Check that GDB gracefully handles the case of the hook-stop running
# "next".  GDB used to print the stop event twice.

proc hook_stop_next {} {
    with_test_prefix "hook-stop runs next" {
	global gdb_prompt

	setup "next"

	set test "run hook-stop"
	gdb_test_multiple "continue" "$test" {
	    -re "a = 2.*a = 2${gdb_prompt} $" {
		fail $test
	    }
	    -re "a = 2.*${gdb_prompt} $" {
		pass $test
	    }
	}
    }
}

hook_stop_before_frame
hook_stop_kill
hook_stop_continue_fg
hook_stop_continue_bg
hook_stop_next