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# Copyright 1997-2013 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This program tests the 'catch syscall' functionality.
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# It was written by Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>
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if { [is_remote target] || ![isnative] } then {
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# Until "catch syscall" is implemented on other targets...
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if {![istarget "hppa*-hp-hpux*"] && ![istarget "*-linux*"]} then {
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# This shall be updated whenever 'catch syscall' is implemented
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# on some architecture.
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#if { ![istarget "i\[34567\]86-*-linux*"]
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if { ![istarget "x86_64-*-linux*"] && ![istarget "i\[34567\]86-*-linux*"]
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&& ![istarget "powerpc-*-linux*"] && ![istarget "powerpc64-*-linux*"]
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&& ![istarget "sparc-*-linux*"] && ![istarget "sparc64-*-linux*"]
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&& ![istarget "mips*-linux*"] } {
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set testfile "catch-syscall"
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set srcfile ${testfile}.c
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set binfile ${objdir}/${subdir}/${testfile}
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# All (but the last) syscalls from the example code
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# They are ordered according to the file, so do not change this.
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set all_syscalls { "close" "chroot" }
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set all_syscalls_numbers { }
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# The last syscall (exit()) does not return, so
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# we cannot expect the catchpoint to be triggered
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# twice. It is a special case.
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set last_syscall "exit_group"
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if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
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untested catch-syscall.exp
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# Internal procedure used to check if, after issuing a 'catch syscall'
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# command (without arguments), the 'info breakpoints' command displays
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# that '"any syscall"' is to be caught.
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proc check_info_bp_any_syscall {} {
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# Verifying that the catchpoint appears in the 'info breakpoints'
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# command, but with "<any syscall>".
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set thistest "catch syscall appears in 'info breakpoints'"
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gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall \"<any syscall>\".*" $thistest
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# Internal procedure used to check if, after issuing a 'catch syscall X'
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# command (with arguments), the 'info breakpoints' command displays
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# that the syscall 'X' is to be caught.
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proc check_info_bp_specific_syscall { syscall } {
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set thistest "syscall(s) $syscall appears in 'info breakpoints'"
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gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscall(\[(\]s\[)\])? (.)?${syscall}(.)?.*" $thistest
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# Internal procedure used to check if, after issuing a 'catch syscall X'
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# command (with many arguments), the 'info breakpoints' command displays
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# that the syscalls 'X' are to be caught.
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proc check_info_bp_many_syscalls { syscalls } {
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foreach name $syscalls {
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set filter_str "${filter_str}${name}, "
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set filter_str [ string trimright $filter_str ", " ]
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set thistest "syscalls $filter_str appears in 'info breakpoints'"
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gdb_test "info breakpoints" ".*catchpoint.*keep y.*syscalls (.)?${filter_str}(.)?.*" $thistest
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# This procedure checks if there was a call to a syscall.
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proc check_call_to_syscall { syscall } {
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set thistest "program has called $syscall"
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gdb_test "continue" "Catchpoint .*(call to syscall .?${syscall}.?).*" $thistest
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# This procedure checks if the syscall returned.
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proc check_return_from_syscall { syscall } {
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set thistest "syscall $syscall has returned"
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gdb_test "continue" "Catchpoint .*(returned from syscall (.)?${syscall}(.)?).*" $thistest
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# Internal procedure that performs two 'continue' commands and checks if
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# a syscall call AND return occur.
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proc check_continue { syscall } {
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# Testing if the 'continue' stops at the
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# specified syscall_name. If it does, then it should
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# first print that the infeior has called the syscall,
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# and after print that the syscall has returned.
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# Testing if the inferiorr has called the syscall.
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check_call_to_syscall $syscall
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# And now, that the syscall has returned.
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check_return_from_syscall $syscall
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# Inserts a syscall catchpoint with an argument.
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proc insert_catch_syscall_with_arg { syscall } {
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# Trying to set the catchpoint
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set thistest "catch syscall with arguments ($syscall)"
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gdb_test "catch syscall $syscall" "Catchpoint .*(syscall (.)?${syscall}(.)?( \[\[0-9\]+\])?).*" $thistest
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check_info_bp_specific_syscall $syscall
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# Inserts a syscall catchpoint with many arguments.
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proc insert_catch_syscall_with_many_args { syscalls numbers } {
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set catch [ join $syscalls " " ]
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foreach name $syscalls number $numbers {
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set filter_str "${filter_str}'${name}' \[${number}\] "
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set filter_str [ string trimright $filter_str " " ]
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# Trying to set the catchpoint
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set thistest "catch syscall with arguments ($filter_str)"
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gdb_test "catch syscall $catch" "Catchpoint .*(syscalls (.)?${filter_str}(.)?).*" $thistest
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check_info_bp_many_syscalls $syscalls
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proc check_for_program_end {} {
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# Deleting the catchpoints
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proc test_catch_syscall_without_args {} {
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global gdb_prompt all_syscalls last_syscall
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# Trying to set the syscall
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set thistest "setting catch syscall without arguments"
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gdb_test "catch syscall" "Catchpoint .*(syscall).*" $thistest
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check_info_bp_any_syscall
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# We have to check every syscall
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foreach name $all_syscalls {
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# At last but not least, we check if the inferior
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# has called the last (exit) syscall.
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check_call_to_syscall $last_syscall
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# Now let's see if the inferior correctly finishes.
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check_for_program_end
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proc test_catch_syscall_with_args {} {
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set syscall_name "close"
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insert_catch_syscall_with_arg $syscall_name
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# Can we continue until we catch the syscall?
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check_continue $syscall_name
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# Now let's see if the inferior correctly finishes.
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check_for_program_end
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proc test_catch_syscall_with_many_args {} {
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global gdb_prompt all_syscalls all_syscalls_numbers
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insert_catch_syscall_with_many_args $all_syscalls $all_syscalls_numbers
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# Can we continue until we catch the syscalls?
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foreach name $all_syscalls {
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# Now let's see if the inferior correctly finishes.
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check_for_program_end
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proc test_catch_syscall_with_wrong_args {} {
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# mlock is not called from the source
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set syscall_name "mlock"
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insert_catch_syscall_with_arg $syscall_name
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# Now, we must verify if the program stops with a continue.
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# If it doesn't, everything is right (since we don't have
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# a syscall named "mlock" in it). Otherwise, this is a failure.
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set thistest "catch syscall with unused syscall ($syscall_name)"
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gdb_continue_to_end $thistest
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proc test_catch_syscall_restarting_inferior {} {
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set syscall_name "chroot"
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insert_catch_syscall_with_arg $syscall_name
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# Let's first reach the call of the syscall.
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check_call_to_syscall $syscall_name
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# Now, restart the program
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# And check for call/return
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check_continue $syscall_name
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check_for_program_end
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proc test_catch_syscall_fail_nodatadir {} {
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# Make sure GDB doesn't load the syscalls xml from the system data
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gdb_test_no_output "set data-directory /the/path/to/nowhere"
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# Testing to see if we receive a warning when calling "catch syscall"
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# without XML support (without datadir).
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set thistest "Catch syscall displays a warning when there is no XML support (no datadir set)"
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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
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# Since the catchpoint was set, we must check if it's present at
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check_info_bp_any_syscall
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proc do_syscall_tests {} {
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global gdb_prompt srcdir
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# NOTE: We don't have to point gdb at the correct data-directory.
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# For the build tree that is handled by INTERNAL_GDBFLAGS.
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# Verify that the 'catch syscall' help is available
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set thistest "help catch syscall"
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gdb_test "help catch syscall" "Catch system calls.*" $thistest
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# Try to set a catchpoint to a nonsense syscall
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set thistest "catch syscall to a nonsense syscall is prohibited"
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gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .*" $thistest
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# Regression test for syscall completer bug.
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gdb_test "complete catch syscall close chroo" \
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"catch syscall close chroot" \
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"complete catch syscall with multiple words"
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# Testing the 'catch syscall' command without arguments.
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# This test should catch any syscalls.
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if [runto_main] then { test_catch_syscall_without_args }
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# Testing the 'catch syscall' command with arguments.
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# This test should only catch the specified syscall.
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if [runto_main] then { test_catch_syscall_with_args }
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# Testing the 'catch syscall' command with many arguments.
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# This test should catch $all_syscalls.
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if [runto_main] then { test_catch_syscall_with_many_args }
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# Testing the 'catch syscall' command with WRONG arguments.
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# This test should not trigger any catchpoints.
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if [runto_main] then { test_catch_syscall_with_wrong_args }
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# Testing the 'catch' syscall command during a restart of
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if [runto_main] then { test_catch_syscall_restarting_inferior }
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proc test_catch_syscall_without_args_noxml {} {
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# We will need the syscall names even not using it
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# because we need to know know many syscalls are in
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global gdb_prompt all_syscalls last_syscall
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set thistest "Catch syscall without arguments and without XML support"
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gdb_test "catch syscall" "Catchpoint .*(syscall).*"
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# Now, we should be able to set a catchpoint,
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# and GDB shall not display the warning anymore.
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foreach name $all_syscalls {
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# Unfortunately, we don't know the syscall number
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# that will be caught because this information is
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# arch-dependent. Thus, we try to catch anything
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# similar to a number.
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check_continue "\[0-9\]*"
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# At last but not least, we check if the inferior
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# has called the last (exit) syscall.
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check_call_to_syscall "\[0-9\]*"
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proc test_catch_syscall_with_args_noxml {} {
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# The number of the "close" syscall. This is our
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# option for a "long-estabilished" syscall in all
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# Linux architectures, but unfortunately x86_64 and
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# a few other platforms don't "follow the convention".
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# Because of this, we need this ugly check :-(.
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if { [istarget "x86_64-*-linux*"] } {
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insert_catch_syscall_with_arg $close_number
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check_continue $close_number
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proc test_catch_syscall_with_wrong_args_noxml {} {
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# Even without XML support, GDB should not accept unknown
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# syscall names for the catchpoint.
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set thistest "Catch a nonsense syscall without XML support"
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gdb_test "catch syscall nonsense_syscall" "Unknown syscall name .nonsense_syscall.*" $thistest
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proc do_syscall_tests_without_xml {} {
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global gdb_prompt srcdir
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# Make sure GDB doesn't load the syscalls xml from the system data
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gdb_test_no_output "set data-directory /the/path/to/nowhere"
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# Let's test if we can catch syscalls without XML support.
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# We should succeed, but GDB is not supposed to print syscall names.
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if [runto_main] then { test_catch_syscall_without_args_noxml }
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# The only valid argument "catch syscall" should accept is the
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# syscall number, and not the name (since it can't translate a
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# It's worth mentioning that we only try to catch the syscall
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# close(). This is because the syscall number is an arch-dependent
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# information, so we can't assume that we know every syscall number
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# in this system. Therefore, we have decided to use a "long-estabilished"
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# system call, and close() just sounded the right choice :-).
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if [runto_main] then { test_catch_syscall_with_args_noxml }
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# Now, we'll try to provide a syscall name (valid or not) to the command,
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# and expect it to fail.
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if [runto_main] then { test_catch_syscall_with_wrong_args_noxml }
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# This procedure fills the vector "all_syscalls_numbers" with the proper
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# numbers for the used syscalls according to the architecture.
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proc fill_all_syscalls_numbers {} {
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global all_syscalls_numbers
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# For Linux on x86, PPC, PPC64, SPARC and SPARC64, the numbers for the syscalls
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# "close" and "chroot" are the same.
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if { [istarget "i\[34567\]86-*-linux*"]
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|| [istarget "powerpc-*-linux*"] || [istarget "powerpc64-*-linux*"]
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|| [istarget "sparc-*-linux*"] || [istarget "sparc64-*-linux*"] } {
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set all_syscalls_numbers { "6" "61" }
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# Start with a fresh gdb
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set do_xml_test ![gdb_skip_xml_test]
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gdb_reinitialize_dir $srcdir/$subdir
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# Execute the tests, using XML support
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# Now, we have to see if GDB displays a warning when we
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# don't set the data-directory but try to use catch syscall
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# anyway. For that, we must restart GDB first.
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gdb_reinitialize_dir $srcdir/$subdir
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test_catch_syscall_fail_nodatadir
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gdb_reinitialize_dir $srcdir/$subdir
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# Execute the tests, without XML support. In this case, GDB will
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# only display syscall numbers, and not syscall names.
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do_syscall_tests_without_xml
added
removed
.pc/upstream-arm-catch-syscall.patch/gdb/testsuite/gdb.base/catch-syscall.exp
