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# Copyright 1997-2021 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
# 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 <>.
if [target_info exists gdb,nosignals] {
verbose "Skipping signals.exp because of nosignals."
standard_testfile .c
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
untested "failed to compile"
return -1
# Create and source the file that provides information about the compiler
# used to compile the test case.
if [get_compiler_info] {
return -1
# This will need to be updated as the exact list of signals changes,
# but I want to test that GDB_SIGNAL_0, GDB_SIGNAL_DEFAULT, and
# GDB_SIGNAL_UNKNOWN are skipped.
proc test_handle_all_print {} {
global timeout
# Increase timeout and expect input buffer for large output from gdb.
# Allow blank or TAB as whitespace characters.
set oldtimeout $timeout
set timeout [expr "$timeout + 60"]
verbose "Timeout is now $timeout seconds" 2
if { ![istarget "*-*-linux*"]
&& ( [istarget "*-*-gnu*"]
|| [istarget "*-*-mach*"] ) } {
gdb_test_sequence "handle all print" "" \
"Signal\[ \]+Stop\[ \]+Print\[ \]+Pass to program\[ \]+Description\r\nSIGHUP\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Hangup"
"SIG63\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Real-time event 63"
"EXC_BREAKPOINT\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Breakpoint"
} else {
gdb_test_sequence "handle all print" "" \
"Signal\[ \]+Stop\[ \]+Print\[ \]+Pass to program\[ \]+Description\r\nSIGHUP\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Hangup"
"SIG63\[ \]+Yes\[ \]+Yes\[ \]+Yes\[ \]+Real-time event 63"
set timeout $oldtimeout
verbose "Timeout restored to $timeout seconds" 2
clean_restart $binfile
if [runto_main] then {
# Since count is a static variable outside main, runto_main is no
# guarantee that count will be 0 at this point.
gdb_test_no_output "set variable count = 0"
# Test an inferior function call that takes a signal that hits a
# breakpoint (with a false condition). When GDB tries to run the
# stack dummy, it will hit the breakpoint at handler. Provided it
# doesn't lose its cool, this is not a problem, it just has to
# note that the breakpoint condition is false and keep going.
# ...setup an always false conditional breakpoint
gdb_test "break handler if 0" "Breakpoint \[0-9\]+ .*"
gdb_test_no_output "set \$handler_breakpoint_number = \$bpnum"
# ...setup the signal
gdb_test "next" "signal \\(SIGUSR1.*" "next to signal"
gdb_test "next" "alarm \\(.*" "next to alarm #1"
gdb_test "next" "\\+\\+count; /\\* first \\*/" \
"next to ++count #1"
sleep 2
# the function
gdb_test "p func1 ()" "^p func1 \\(\\)\r\n.\[0-9\]* = void" \
"p func1 () #1"
# ...veryfiy that the cout was updated
gdb_test "p count" "= 2" "p count #1"
# Now run the same test but with a breakpoint that does stop.
# ...set up the breakpoint and signal
gdb_test "condition \$handler_breakpoint_number" "now unconditional\\."
gdb_test "next" "alarm \\(.*" "next to alarm #2"
gdb_test "next" "\\+\\+count; /\\* second \\*/" \
"next to ++count #2"
sleep 2
# the function, which is immediatly interrupted
gdb_test "p func1 ()" \
"Breakpoint \[0-9\]*, handler.*
The program being debugged stopped while in a function called from GDB.*" \
"p func1 () #2"
# ...verify the backtrace
gdb_test "backtrace" \
"#0 handler.*#1 .signal handler called.*#2 func1.*#3 .function called from gdb.*#4.*main.*" \
"backtrace from handler when calling func1"
# ...and continue (silently returning)
gdb_test "continue" "Continuing\\."
# ...and then count should have been incremented
gdb_test "p count" "= 5" "p count #2"
# Verify that "info signals" produces reasonable output.
gdb_test_sequence "info signals" "" \
"SIGPRIO" "SIG33" "SIG34" "SIG35" "SIG36" "SIG37" "SIG38" \
"SIG39" "SIG40" "SIG41" "SIG42" "SIG43" "SIG44" "SIG45" \
"SIG46" "SIG47" "SIG48" "SIG49" "SIG50" "SIG51" "SIG52" \
"SIG53" "SIG54" "SIG55" "SIG56" "SIG57" "SIG58" "SIG59" \
"SIG60" "SIG61" "SIG62" "SIG63" \
"Use the \"handle\" command to change these tables"]
# Verify that "info signal" correctly handles an argument, be it a
# symbolic signal name, or an integer ID.
gdb_test "info signal SIGTRAP" \
"SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*"
gdb_test "info signal 5" \
"SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*"
# Verify that "handle" with illegal arguments is gracefully, um,
# handled.
gdb_test "handle" \
"Argument required .signal to handle.*" \
"handle without arguments"
gdb_test "handle SIGFOO" \
"Unrecognized or ambiguous flag word: \"SIGFOO\".*" \
"handle with bogus SIG"
gdb_test "handle SIGHUP frump" \
"Unrecognized or ambiguous flag word: \"frump\".*" \
"handle SIG with bogus action"
# Verify that "handle" can take multiple actions per SIG, and that
# in the case of conflicting actions, that the rightmost action
# "wins".
gdb_test "handle SIGHUP print noprint" \
"SIGHUP\[ \t\]*No\[ \t\]*No\[ \t\]*Yes\[ \t\]*Hangup.*" \
"handle SIG with multiple conflicting actions"
# Exercise all the various actions. (We don't care what the
# outcome is, this is just to ensure that they all can be parsed.)
gdb_test "handle SIGHUP print noprint stop nostop ignore noignore pass nopass" \
"Signal.*" \
"handle SIG parses all legal actions"
# Verify that we can "handle" multiple signals at once,
# interspersed with actions.
gdb_test "handle SIG63 print SIGILL" \
"SIGILL\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Illegal instruction.*SIG63\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*Real-time event 63.*" \
"handle multiple SIGs"
# Verify that "handle" can take a numeric argument for the signal
# ID, rather than a symbolic name. (This may not be portable;
# works for HP-UX.)
# Also note that this testpoint overrides SIGTRAP, which on HP-UX
# at least, is used to implement single-steps and breakpoints.
# Don't expect to run the inferior after this!
set test "override SIGTRAP"
gdb_test_multiple "handle 5 nopass" "$test" {
-re "SIGTRAP is used by the debugger.*Are you sure you want to change it.*y or n.*" {
gdb_test "y" \
"SIGTRAP\[ \t\]*Yes\[ \t\]*Yes\[ \t\]*No\[ \t\]*Trace/breakpoint trap.*" \
# GDB doesn't seem to allow numeric signal IDs larger than 15. Verify
# that restriction. ??rehrauer: Not sure if this is a feature or a
# bug, actually. Why is the range 1-15?
gdb_test "handle 58" \
"Only signals 1-15 are valid as numeric signals.*Use \"info signals\" for a list of symbolic signals.*" \
"invalid signal number rejected"
# Verify that we can accept a signal ID range (number-number).
# ??rehrauer: This feature isn't documented on the quick-reference
# card.
gdb_test "handle 13-15" \
"handle multiple SIGs via integer range"
# Bizarrely enough, GDB also allows you to reverse the range stat,
# stop IDs. E.g., "3-1" and "1-3" mean the same thing. Probably
# this isn't documented, but the code anticipates it, so we'd best
# test it...
gdb_test "handle 15-13" \
"handle multiple SIGs via reverse integer range"
# SIGINT is used by the debugger as well. Verify that we can
# change our minds about changing it.
set test "override SIGINT"
gdb_test_multiple "handle SIGINT nopass" "$test" {
-re "SIGINT is used by the debugger.*Are you sure you want to change it.*y or n.*" {
gdb_test_multiple "n" "$test" {
-re "Not confirmed, unchanged.*Signal.*$gdb_prompt $" {
# "Signal ..." should not be in the output.
fail gdb/8812 "$test"
-re "Not confirmed, unchanged.*$gdb_prompt $" {
pass "$test"
# Verify that GDB responds gracefully to the "signal" command with
# a missing argument.
gdb_test "signal" \
"Argument required .signal number..*" \
"signal without arguments disallowed"
# Verify that we can successfully send a signal other than 0 to
# the inferior. (This probably causes the inferior to run away.
# Be prepared to rerun to main for further testing.)
gdb_test "signal SIGUSR1" "Breakpoint.*handler.*"
gdb_test "bt" \
"#0 handler .*#1 .signal handler called.*\#2 .*main.*" \
"backtrace for SIGUSR1"
return 0