# Copyright 2004 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# The program sigstep.c creates a very simple backtrace containing one
# signal handler and signal trampoline. A flag is set and then the
# handler returns. This is repeated at infinitum.
# This test runs the program up to the signal handler, and then
# attempts to step/next out of the handler and back into main.
if [target_info exists gdb,nosignals] {
verbose "Skipping sigstep.exp because of nosignals."
continue
}
if $tracelevel then {
strace $tracelevel
}
set prms_id 0
set bug_id 0
set testfile sigstep
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
untested "Couldn't compile ${module}.c"
return -1
}
# get things started
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
gdb_test "display/i \$pc"
# Advance to main
if { ![runto_main] } then {
gdb_suppress_tests;
}
# Pass all the alarms straight through (but verbosely)
# gdb_test "handle SIGALRM print pass nostop"
# gdb_test "handle SIGVTALRM print pass nostop"
# gdb_test "handle SIGPROF print pass nostop"
# Run to the signal handler, validate the backtrace.
gdb_test "break handler"
gdb_test "continue" ".* handler .*" "continue to stepi handler"
send_gdb "bt\n"
gdb_expect_list "backtrace for nexti" ".*$gdb_prompt $" {
"\[\r\n\]+.0 \[^\r\n\]* handler "
"\[\r\n\]+.1 .signal handler called."
"\[\r\n\]+.2 \[^\r\n\]* main .*"
}
# APPLE LOCAL begin signal name
if [istarget "powerpc-apple-darwin*"] {
warning "Darwin unable to single-step out of signal handler, skipping rest of tests"
continue
}
# APPLE LOCAL end signal name
proc advance { i } {
global gdb_prompt
set prefix "$i from handler"
# Get us back into the handler
gdb_test "continue" ".* handler .*" "$prefix; continue to handler"
set test "$prefix; leave handler"
gdb_test_multiple "$i" "${test}" {
-re "done = 1;.*${gdb_prompt} $" {
send_gdb "$i\n"
exp_continue -continue_timer
}
-re "\} .. handler .*${gdb_prompt} $" {
send_gdb "$i\n"
exp_continue -continue_timer
}
-re "Program exited normally.*${gdb_prompt} $" {
setup_kfail powerpc-*-*bsd* gdb/1639
fail "$test (program exited)"
}
-re "(while ..done|done = 0).*${gdb_prompt} $" {
# After stepping out of a function /r signal-handler, GDB will
# advance the inferior until it is at the first instruction of
# a code-line. While typically things return to the middle of
# the "while..." (and hence GDB advances the inferior to the
# "return..." line) it is also possible for the return to land
# on the first instruction of "while...". Accept both cases.
pass "$test"
}
}
}
proc advancei { i } {
global gdb_prompt
set prefix "$i from handleri"
set program_exited 0
# Get us back into the handler
gdb_test "continue" ".* handler .*" "$prefix; continue to handler"
set test "$prefix; leave handler"
gdb_test_multiple "$i" "${test}" {
-re "Cannot insert breakpoint 0.*${gdb_prompt} $" {
# Some platforms use a special read-only page for signal
# trampolines. We can't set a breakpoint there, and we
# don't gracefully fall back to single-stepping.
setup_kfail "i?86-*-linux*" gdb/1736
setup_kfail "*-*-openbsd*" gdb/1736
fail "$test (could not set breakpoint)"
return
}
-re "done = 1;.*${gdb_prompt} $" {
send_gdb "$i\n"
exp_continue -continue_timer
}
-re "\} .. handler .*${gdb_prompt} $" {
send_gdb "$i\n"
exp_continue -continue_timer
}
-re "signal handler called.*${gdb_prompt} $" {
pass "$test"
}
-re "main .*${gdb_prompt} $" {
fail "$test (in main)"
}
-re "Program exited normally.*${gdb_prompt} $" {
fail "$test (program exited)"
set program_exited 1
}
-re "Make handler return now.*y or n. $" {
send_gdb "y\n"
exp_continue -continue_timer
}
}
set test "$prefix; leave signal trampoline"
gdb_test_multiple "$i" "${test}" {
-re "while .*${gdb_prompt} $" {
pass "$test (in main)"
}
-re "signal handler called.*${gdb_prompt} $" {
send_gdb "$i\n"
exp_continue -continue_timer
}
-re "return .*${gdb_prompt} $" {
fail "$test (stepped)"
}
-re "Make .*frame return now.*y or n. $" {
send_gdb "y\n"
exp_continue -continue_timer
}
-re "Program exited normally.*${gdb_prompt} $" {
kfail gdb/1639 "$test (program exited)"
set program_exited 1
}
-re "The program is not being run.*${gdb_prompt} $" {
if { $program_exited } {
# Previously kfailed with an exit
pass "$test (the program is not being run)"
} else {
fail "$test (the program is not being run)"
}
}
}
}
# Check that we can step/next our way out of a signal handler.
advance step
advancei stepi
advance next
advancei nexti
advancei finish
advancei return
gdb_test "set done = 1" "" "Set done as return will have skipped it"
# Check that we can step/next our way into / over a signal handler.
# There are at least the following cases: breakpoint @pc VS breakpoint
# in handler VS step / next / continue.
# Use the real-time itimer, as otherwize the process never gets enough
# time to expire the timer.
delete_breakpoints
set infinite_loop [gdb_get_line_number {while (!done)}]
gdb_test "set itimer = itimer_real"
gdb_test "break [gdb_get_line_number {done = 0}]"
# Try stepping when there's a signal pending, and a breakpoint at the
# handler. Should step into the signal handler.
proc skip_to_handler { i } {
global gdb_prompt
global infinite_loop
set prefix "$i to handler"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
# Advance to the infinite loop
gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop"
# Make the signal pending
sleep 1
# Insert / remove the handler breakpoint.
gdb_test "break handler" "" "$prefix; break handler"
gdb_test "$i" " handler .*" "$prefix; performing $i"
gdb_test "clear handler" "" "$prefix; clear handler"
}
skip_to_handler step
skip_to_handler next
skip_to_handler continue
# Try stepping when there's a signal pending, and a breakpoint at the
# handler's entry-point. Should step into the signal handler stopping
# at the entry-point.
# Some systems (e.x., GNU/Linux as of 2004-08-30), when delivering a
# signal, resume the process at the first instruction of the signal
# handler and not the first instruction of the signal trampoline. The
# stack is constructed such that the signal handler still appears to
# have been called by the trampoline code. This test checks that it
# is possible to stop the inferior, even at that first instruction.
proc skip_to_handler_entry { i } {
global gdb_prompt
global infinite_loop
set prefix "$i to handler entry"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
# Advance to the infinite loop
gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop"
# Make the signal pending
sleep 1
# Insert / remove the handler breakpoint.
gdb_test "break *handler" "" "$prefix; break handler"
gdb_test "$i" " handler .*" "$prefix; performing $i"
gdb_test "clear *handler" "" "$prefix; clear handler"
}
skip_to_handler_entry step
skip_to_handler_entry next
skip_to_handler_entry continue
# Try stepping when there's a signal pending but no breakpoints.
# Should skip the handler advancing to the next line.
proc skip_over_handler { i } {
global gdb_prompt
global infinite_loop
set prefix "$i over handler"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
# Advance to the infinite loop
gdb_test "advance $infinite_loop" "" "$prefix; advance to infinite loop"
# Make the signal pending
sleep 1
gdb_test "$i" "done = 0.*" "$prefix; performing $i"
}
skip_over_handler step
skip_over_handler next
skip_over_handler continue
# Try stepping when there's a signal pending, a pre-existing
# breakpoint at the current instruction, and a breakpoint in the
# handler. Should advance to the signal handler.
proc breakpoint_to_handler { i } {
global gdb_prompt
global infinite_loop
set prefix "$i on breakpoint, to handler"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
gdb_test "break $infinite_loop" "" "$prefix; break infinite loop"
gdb_test "break handler" "" "$prefix; break handler"
# Continue to the infinite loop
gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop"
# Make the signal pending
sleep 1
setup_kfail "i*86-*-*" gdb/1738
gdb_test "$i" " handler .*" "$prefix; performing $i"
gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop"
gdb_test "clear handler" "" "$prefix; clear handler"
}
breakpoint_to_handler step
breakpoint_to_handler next
breakpoint_to_handler continue
# Try stepping when there's a signal pending, and a breakpoint at the
# handler's entry instruction and a breakpoint at the current
# instruction. Should step into the signal handler and breakpoint at
# that entry instruction.
# Some systems (e.x., GNU/Linux as of 2004-08-30), when delivering a
# signal, resume the process at the first instruction of the signal
# handler and not the first instruction of the signal trampoline. The
# stack is constructed such that the signal handler still appears to
# have been called by the trampoline code. This test checks that it
# is possible to stop the inferior, even at that first instruction.
proc breakpoint_to_handler_entry { i } {
global gdb_prompt
global infinite_loop
set prefix "$i on breakpoint, to handler entry"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
gdb_test "break $infinite_loop" "" "$prefix; break infinite loop"
gdb_test "break *handler" "" "$prefix; break handler"
# Continue to the infinite loop
gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop"
# Make the signal pending
sleep 1
setup_kfail "i*86-*-*" gdb/1738
gdb_test "$i" " handler .*" "$prefix; performing $i"
gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop"
gdb_test "clear *handler" "" "$prefix; clear handler"
}
breakpoint_to_handler_entry step
breakpoint_to_handler_entry next
breakpoint_to_handler_entry continue
# Try stepping when there's a signal pending, and a pre-existing
# breakpoint at the current instruction, and no breakpoint in the
# handler. Should advance to the next line.
proc breakpoint_over_handler { i } {
global gdb_prompt
global infinite_loop
set prefix "$i on breakpoint, skip handler"
# Run around to the done
# You can add more patterns to this if you need them.
set test "$prefix; resync"
gdb_test_multiple "continue" "$test" {
-re "done = 0.*$gdb_prompt " {
pass "$test"
}
}
gdb_test "break $infinite_loop" "" "$prefix; break infinite loop"
# Continue to the infinite loop
gdb_test "continue" "while ..done.*" "$prefix; continue to infinite loop"
# Make the signal pending
sleep 1
gdb_test "$i" "done = 0.*" "$prefix; performing $i"
gdb_test "clear $infinite_loop" "" "$prefix; clear infinite loop"
}
breakpoint_over_handler step
breakpoint_over_handler next
breakpoint_over_handler continue