1 # Copyright 2016-2019 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 # Test a thread is doing step-over a syscall instruction which is exit,
19 # and GDBserver should cleanup its state of step-over properly.
23 # Define the syscall instruction for each target.
25 if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } {
26 set syscall_insn "\[ \t\](int|syscall|sysenter)\[ \t\]"
27 } elseif { [istarget "aarch64*-*-linux*"] || [istarget "arm*-*-linux*"] } {
28 set syscall_insn "\[ \t\](swi|svc)\[ \t\]"
30 unsupported "unknown syscall instruction"
34 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
38 # Start with a fresh gdb.
39 clean_restart ${testfile}
41 fail "can't run to main"
45 gdb_test "set follow-fork-mode child"
46 gdb_test "set detach-on-fork off"
48 # Step 1, find the syscall instruction address.
50 gdb_test "break _exit" "Breakpoint $decimal at .*"
52 # Hit the breakpoint on _exit. The address of syscall insn is recorded.
55 "Continuing\\..*Breakpoint $decimal.*_exit \\(.*\\).*" \
58 gdb_test "display/i \$pc" ".*"
60 # Single step until we see a syscall insn or we reach the
61 # upper bound of loop iterations.
62 set msg "find syscall insn in exit"
65 gdb_test_multiple "stepi" $msg {
66 -re ".*$syscall_insn.*$gdb_prompt $" {
69 -re "x/i .*=>.*\r\n$gdb_prompt $" {
71 if {$steps == $max_steps} {
80 if {$steps == $max_steps} {
85 gdb_test_no_output "delete display 1"
87 set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]
89 gdb_test "continue" "exited normally.*" "continue to end, first time"
90 gdb_test "inferior 1" ".*Switching to inferior 1.*" \
91 "switch back to inferior 1, first time"
95 gdb_test "break marker"
97 gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \
98 "continue to marker, first time"
100 # Step 2, create a breakpoint which evaluates false, and force it
101 # evaluated on the target side.
103 set test "set breakpoint condition-evaluation target"
104 gdb_test_multiple $test $test {
105 -re "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead.\r\n$gdb_prompt $" {
106 # Target doesn't support breakpoint condition evaluation
107 # on its side, but it is no harm to run the test.
109 -re "^$test\r\n$gdb_prompt $" {
113 gdb_test "break \*$syscall_insn_addr if main == 0" \
114 "Breakpoint \[0-9\]* at .*" \
115 "set conditional break at syscall address"
117 # Resume the child process, and the step-over is being done.
119 gdb_test "continue" "exited normally.*" "continue to end, second time"
120 gdb_test "inferior 1" ".*Switching to inferior 1.*" \
121 "switch back to inferior 1, second time"
123 # Switch back to the parent process, continue to the marker to
124 # test GDBserver's state is still correct.
126 gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \
127 "continue to marker, second time"