gdb/testsuite/gdb.base/catch-signal.exp

# Copyright 2012-2021 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/>.

if [target_info exists gdb,nosignals] {
    verbose "Skipping catch-signal.exp because of nosignals."
    continue
}

standard_testfile

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

proc test_catch_signal {signame} {
    global srcfile

    with_test_prefix $signame {
	if {![runto_main]} {
	    return -1
	}

	# Test "catch signal" without arguments.
	# Don't let the signal be handled otherwise.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "first HUP"]
	gdb_continue_to_breakpoint "first HUP"
	gdb_test "handle SIGHUP nostop noprint pass" \
	    "SIGHUP.*No.*No.*Yes.*"
	gdb_test "catch signal" "Catchpoint .*"
	gdb_test "continue" "Catchpoint .*"

	# Now ensure that the "pass" setting worked, and also that we did not
	# see gdb's SIGTRAP.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "handle marker"]
	gdb_continue_to_breakpoint "handle marker"

	delete_breakpoints

	# Catch just $SIGNAME.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "second HUP"]
	gdb_continue_to_breakpoint "second HUP"
	gdb_test "catch signal $signame" "Catchpoint .*"
	gdb_test "continue" "Catchpoint .*"
	delete_breakpoints

	# Catch just SIGUSR1 -- but it isn't sent.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "third HUP"]
	gdb_continue_to_breakpoint "third HUP"
	gdb_test "handle SIGUSR1 nostop noprint pass" \
	    "SIGUSR1.*No.*No.*Yes.*"
	gdb_test "catch signal SIGUSR1" "Catchpoint .*"

	# Also verify that if we set SIGHUP to "nopass", then it is
	# still not delivered.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "handle marker"]
	gdb_test "handle SIGHUP nostop noprint nopass" \
	    "SIGHUP.*No.*No.*No.*"

	gdb_breakpoint ${srcfile}:[gdb_get_line_number "fourth HUP"]
	gdb_continue_to_breakpoint "fourth HUP"
	delete_breakpoints

	# Verify an internal signal used by gdb is properly caught.
	gdb_breakpoint ${srcfile}:[gdb_get_line_number "first INT"]
	gdb_continue_to_breakpoint "first INT"
	set test "override SIGINT to catch"
	gdb_test "handle SIGINT nostop print nopass" \
	    "SIGINT.*No.*Yes.*No.*" \
	    "$test" \
	    "SIGINT is used by the debugger.*Are you sure you want to change it.*y or n.*" \
	    y
	gdb_test "catch signal SIGINT" "Catchpoint .*"
	gdb_test "continue" "Catchpoint .* SIGINT.*"
        
    }
}

# Test with symbolic signal.
test_catch_signal SIGHUP

# Test with numeric signal.
clean_restart $testfile
test_catch_signal 1

# Test with two signals in catchpoint.
clean_restart $testfile
test_catch_signal "SIGHUP SIGUSR2"

#
# Coverage tests.
#

gdb_test "catch signal SIGZARDOZ" "Unknown signal name 'SIGZARDOZ'."
gdb_test "catch signal all" "Catchpoint .*"
gdb_test "catch signal all SIGHUP" "'all' cannot be caught with other signals"
gdb_test "catch signal SIGHUP all" "'all' cannot be caught with other signals"

set i 0
foreach {arg desc} {"" "standard signals" \
			SIGHUP SIGHUP \
			"SIGHUP SIGUSR2" "SIGHUP SIGUSR2" \
			all "any signal"} {
    delete_breakpoints
    gdb_test "catch signal $arg" "Catchpoint .*" \
	"set catchpoint '$arg' for printing"
    gdb_test "info break" "$decimal.*catchpoint.*signal.*$desc.*" \
	"info break for '$arg'"
    gdb_breakpoint "main"
    gdb_test "save breakpoints [standard_output_file bps.$i]" \
	"Saved to file .*bps.$i.*" \
	"save breakpoints for '$arg'"

    set filename [remote_upload host [standard_output_file bps.$i] \
		      [standard_output_file bps-local.$i]]
    set fd [open $filename]
    set file_data [read $fd]
    set data [split $file_data "\n"]
    close $fd

    if {$arg == ""} {
	set pattern "catch signal"
    } else {
	set pattern "catch signal $arg"
    }
    gdb_assert {[expr [llength $data] == 3]} \
	"Number of lines of save breakpoints for '$arg'"
    # Check the first line.
    gdb_assert {[string match $pattern [lindex $data 0]]} \
	"1st line of save breakpoints for '$arg'"
    # Check the second line.
    gdb_assert {[string match "break main" [lindex $data 1]]} \
        "2nd line of save breakpoints for '$arg'"
    # Check the trailing newline.
    gdb_assert {[string match "" [lindex $data 2]]} \
        "Trailing newline of save breakpoints for '$arg'"

    incr i
}