binutils-gdb/gdb/testsuite/gdb.base/catch-syscall.exp

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# Copyright 1997, 1999, 2007, 2008, 2010 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 program tests the 'catch syscall' functionality.
#
# It was written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
# on September/2008.
if { [is_remote target] || ![isnative] } then {
continue
}
global srcfile
set testfile "catch-syscall"
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}
# All (but the last) syscalls from the example code
# They are ordered according to the file, so do not change this.
set all_syscalls { "close" "chroot" }
set all_syscalls_numbers { }
# The last syscall (exit()) does not return, so
# we cannot expect the catchpoint to be triggered
# twice. It is a special case.
set last_syscall "exit_group"
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
untested catch-syscall.exp
return -1
}
# Until "catch syscall" is implemented on other targets...
if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
continue
}
# This shall be updated whenever 'catch syscall' is implemented
# on some architecture.
#if { ![istarget "i\[34567\]86-*-linux*"]
if { ![istarget "x86_64-*-linux*"] && ![istarget "i\[34567\]86-*-linux*"]
&& ![istarget "powerpc-*-linux*"] && ![istarget "powerpc64-*-linux*"]
&& ![istarget "sparc-*-linux*"] && ![istarget "sparc64-*-linux*"] } {
continue
}
# Internal procedure used to check if, after issuing a 'catch syscall'
# command (without arguments), the 'info breakpoints' command displays
# that '"any syscall"' is to be caught.
proc check_info_bp_any_syscall {} {
global gdb_prompt
# Verifying that the catchpoint appears in the 'info breakpoints'
# command, but with "<any syscall>".
set thistest "catch syscall appears in 'info breakpoints'"
gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall \"<any syscall>\".*" $thistest
}
# Internal procedure used to check if, after issuing a 'catch syscall X'
# command (with arguments), the 'info breakpoints' command displays
# that the syscall 'X' is to be caught.
proc check_info_bp_specific_syscall { syscall } {
global gdb_prompt
set thistest "syscall(s) $syscall appears in 'info breakpoints'"
gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall(\[(\]s\[)\])? (.)?${syscall}(.)?.*" $thistest
}
# Internal procedure used to check if, after issuing a 'catch syscall X'
# command (with many arguments), the 'info breakpoints' command displays
# that the syscalls 'X' are to be caught.
proc check_info_bp_many_syscalls { syscalls } {
global gdb_prompt
set filter_str ""
foreach name $syscalls {
set filter_str "${filter_str}${name}, "
}
set filter_str [ string trimright $filter_str ", " ]
set thistest "syscalls $filter_str appears in 'info breakpoints'"
gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscalls (.)?${filter_str}(.)?.*" $thistest
}
# This procedure checks if there was a call to a syscall.
proc check_call_to_syscall { syscall } {
global gdb_prompt
set thistest "program has called $syscall"
gdb_test "continue" "Catchpoint .*(call to syscall .?${syscall}.?).*" $thistest
}
# This procedure checks if the syscall returned.
proc check_return_from_syscall { syscall } {
global gdb_prompt
set thistest "syscall $syscall has returned"
gdb_test "continue" "Catchpoint .*(returned from syscall (.)?${syscall}(.)?).*" $thistest
}
# Internal procedure that performs two 'continue' commands and checks if
# a syscall call AND return occur.
proc check_continue { syscall } {
global gdb_prompt
# Testing if the 'continue' stops at the
# specified syscall_name. If it does, then it should
# first print that the infeior has called the syscall,
# and after print that the syscall has returned.
# Testing if the inferiorr has called the syscall.
check_call_to_syscall $syscall
# And now, that the syscall has returned.
check_return_from_syscall $syscall
}
# Inserts a syscall catchpoint with an argument.
proc insert_catch_syscall_with_arg { syscall } {
global gdb_prompt
# Trying to set the catchpoint
set thistest "catch syscall with arguments ($syscall)"
gdb_test "catch syscall $syscall" "Catchpoint .*(syscall (.)?${syscall}(.)?( \[\[0-9\]+\])?).*" $thistest
check_info_bp_specific_syscall $syscall
}
# Inserts a syscall catchpoint with many arguments.
proc insert_catch_syscall_with_many_args { syscalls numbers } {
global gdb_prompt
set catch [ join $syscalls " " ]
set filter_str ""
foreach name $syscalls number $numbers {
set filter_str "${filter_str}'${name}' \[${number}\] "
}
set filter_str [ string trimright $filter_str " " ]
# Trying to set the catchpoint
set thistest "catch syscall with arguments ($filter_str)"
gdb_test "catch syscall $catch" "Catchpoint .*(syscalls (.)?${filter_str}(.)?).*" $thistest
check_info_bp_many_syscalls $syscalls
}
proc check_for_program_end {} {
global gdb_prompt
# Deleting the catchpoints
delete_breakpoints
set thistest "successful program end"
gdb_test "continue" "Program exited normally.*" $thistest
}
proc test_catch_syscall_without_args {} {
global gdb_prompt all_syscalls last_syscall
# Trying to set the syscall
set thistest "setting catch syscall without arguments"
gdb_test "catch syscall" "Catchpoint .*(syscall).*" $thistest
check_info_bp_any_syscall
# We have to check every syscall
foreach name $all_syscalls {
check_continue $name
}
# At last but not least, we check if the inferior
# has called the last (exit) syscall.
check_call_to_syscall $last_syscall
# Now let's see if the inferior correctly finishes.
check_for_program_end
}
proc test_catch_syscall_with_args {} {
global gdb_prompt
set syscall_name "close"
insert_catch_syscall_with_arg $syscall_name
# Can we continue until we catch the syscall?
check_continue $syscall_name
# Now let's see if the inferior correctly finishes.
check_for_program_end
}
proc test_catch_syscall_with_many_args {} {
global gdb_prompt all_syscalls all_syscalls_numbers
insert_catch_syscall_with_many_args $all_syscalls $all_syscalls_numbers
# Can we continue until we catch the syscalls?
foreach name $all_syscalls {
check_continue $name
}
# Now let's see if the inferior correctly finishes.
check_for_program_end
}
proc test_catch_syscall_with_wrong_args {} {
global gdb_prompt
# mlock is not called from the source
set syscall_name "mlock"
insert_catch_syscall_with_arg $syscall_name
# Now, we must verify if the program stops with a continue.
# If it doesn't, everything is right (since we don't have
# a syscall named "mlock" in it). Otherwise, this is a failure.
set thistest "catch syscall with unused syscall ($syscall_name)"
gdb_test "continue" "Program exited normally.*" $thistest
}
proc test_catch_syscall_restarting_inferior {} {
global gdb_prompt
set syscall_name "chroot"
insert_catch_syscall_with_arg $syscall_name
# Let's first reach the call of the syscall.
check_call_to_syscall $syscall_name
# Now, restart the program
rerun_to_main
# And check for call/return
check_continue $syscall_name
# Can we finish?
check_for_program_end
}
proc test_catch_syscall_fail_nodatadir {} {
global gdb_prompt
# Sanitizing.
delete_breakpoints
# Make sure GDB doesn't load the syscalls xml from the system data
# directory.
gdb_test_no_output "set data-directory /the/path/to/nowhere"
# Testing to see if we receive a warning when calling "catch syscall"
# without XML support (without datadir).
set thistest "Catch syscall displays a warning when there is no XML support (no datadir set)"
gdb_test "catch syscall" "warning: Could not load the syscall XML file.*warning: GDB will not be able to display syscall names nor to verify if.*any provided syscall numbers are valid.*Catchpoint .*(syscall).*" $thistest
# Since the catchpoint was set, we must check if it's present at
# "info breakpoints"
check_info_bp_any_syscall
# Sanitizing.
delete_breakpoints
}
proc do_syscall_tests {} {
global gdb_prompt srcdir
# First, we need to set GDB datadir.
gdb_test_no_output "set data-directory $srcdir/.."
# Verify that the 'catch syscall' help is available
set thistest "help catch syscall"
gdb_test "help catch syscall" "Catch system calls.*" $thistest
# Try to set a catchpoint to a nonsense syscall
set thistest "catch syscall to a nonsense syscall is prohibited"
gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .*" $thistest
# Testing the 'catch syscall' command without arguments.
# This test should catch any syscalls.
if [runto_main] then { test_catch_syscall_without_args }
# Testing the 'catch syscall' command with arguments.
# This test should only catch the specified syscall.
if [runto_main] then { test_catch_syscall_with_args }
# Testing the 'catch syscall' command with many arguments.
# This test should catch $all_syscalls.
if [runto_main] then { test_catch_syscall_with_many_args }
# Testing the 'catch syscall' command with WRONG arguments.
# This test should not trigger any catchpoints.
if [runto_main] then { test_catch_syscall_with_wrong_args }
# Testing the 'catch' syscall command during a restart of
# the inferior.
if [runto_main] then { test_catch_syscall_restarting_inferior }
}
proc test_catch_syscall_without_args_noxml {} {
# We will need the syscall names even not using it
# because we need to know know many syscalls are in
# the example file.
global gdb_prompt all_syscalls last_syscall
delete_breakpoints
set thistest "Catch syscall without arguments and without XML support"
gdb_test "catch syscall" "Catchpoint .*(syscall).*"
# Now, we should be able to set a catchpoint,
# and GDB shall not display the warning anymore.
foreach name $all_syscalls {
# Unfortunately, we don't know the syscall number
# that will be caught because this information is
# arch-dependent. Thus, we try to catch anything
# similar to a number.
check_continue "\[0-9\]*"
}
# At last but not least, we check if the inferior
# has called the last (exit) syscall.
check_call_to_syscall "\[0-9\]*"
delete_breakpoints
}
proc test_catch_syscall_with_args_noxml {} {
global gdb_prompt
# The number of the "close" syscall. This is our
# option for a "long-estabilished" syscall in all
# Linux architectures, but unfortunately x86_64 and
# a few other platforms don't "follow the convention".
# Because of this, we need this ugly check :-(.
set close_number ""
if { [istarget "x86_64-*-linux*"] } {
set close_number "3"
} else {
set close_number "6"
}
delete_breakpoints
insert_catch_syscall_with_arg $close_number
check_continue $close_number
delete_breakpoints
}
proc test_catch_syscall_with_wrong_args_noxml {} {
global gdb_prompt
delete_breakpoints
# Even without XML support, GDB should not accept unknown
# syscall names for the catchpoint.
set thistest "Catch a nonsense syscall without XML support"
gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .nonsense_syscall.*" $thistest
delete_breakpoints
}
proc do_syscall_tests_without_xml {} {
global gdb_prompt srcdir
# Make sure GDB doesn't load the syscalls xml from the system data
# directory.
gdb_test_no_output "set data-directory /the/path/to/nowhere"
# Let's test if we can catch syscalls without XML support.
# We should succeed, but GDB is not supposed to print syscall names.
if [runto_main] then { test_catch_syscall_without_args_noxml }
# The only valid argument "catch syscall" should accept is the
# syscall number, and not the name (since it can't translate a
# name to a number).
#
# It's worth mentioning that we only try to catch the syscall
# close(). This is because the syscall number is an arch-dependent
# information, so we can't assume that we know every syscall number
# in this system. Therefore, we have decided to use a "long-estabilished"
# system call, and close() just sounded the right choice :-).
if [runto_main] then { test_catch_syscall_with_args_noxml }
# Now, we'll try to provide a syscall name (valid or not) to the command,
# and expect it to fail.
if [runto_main] then { test_catch_syscall_with_wrong_args_noxml }
}
# This procedure fills the vector "all_syscalls_numbers" with the proper
# numbers for the used syscalls according to the architecture.
proc fill_all_syscalls_numbers {} {
global all_syscalls_numbers
# For Linux on x86, PPC, PPC64, SPARC and SPARC64, the numbers for the syscalls
# "close" and "chroot" are the same.
if { [istarget "i\[34567\]86-*-linux*"]
|| [istarget "powerpc-*-linux*"] || [istarget "powerpc64-*-linux*"]
|| [istarget "sparc-*-linux*"] || [istarget "sparc64-*-linux*"] } {
set all_syscalls_numbers { "6" "61" }
}
}
# Start with a fresh gdb
gdb_exit
set do_xml_test ![gdb_skip_xml_test]
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
# Execute the tests, using XML support
if $do_xml_test {
do_syscall_tests
# Now, we have to see if GDB displays a warning when we
# don't set the data-directory but try to use catch syscall
# anyway. For that, we must restart GDB first.
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
test_catch_syscall_fail_nodatadir
}
# Restart gdb
gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir
gdb_load ${binfile}
# Execute the tests, without XML support. In this case, GDB will
# only display syscall numbers, and not syscall names.
do_syscall_tests_without_xml