128 lines
3.7 KiB
Plaintext
128 lines
3.7 KiB
Plaintext
# Copyright 2016-2018 Free Software Foundation, Inc.
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#
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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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#
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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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#
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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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standard_testfile
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# Test a thread is doing step-over a syscall instruction which is exit,
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# and GDBserver should cleanup its state of step-over properly.
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set syscall_insn ""
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# Define the syscall instruction for each target.
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if { [istarget "i\[34567\]86-*-linux*"] || [istarget "x86_64-*-linux*"] } {
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set syscall_insn "\[ \t\](int|syscall|sysenter)\[ \t\]"
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} elseif { [istarget "aarch64*-*-linux*"] || [istarget "arm*-*-linux*"] } {
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set syscall_insn "\[ \t\](swi|svc)\[ \t\]"
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} else {
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unsupported "unknown syscall instruction"
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return -1
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}
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if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
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return -1
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}
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# Start with a fresh gdb.
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clean_restart ${testfile}
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if ![runto_main] {
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fail "can't run to main"
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return -1
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}
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gdb_test "set follow-fork-mode child"
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gdb_test "set detach-on-fork off"
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# Step 1, find the syscall instruction address.
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gdb_test "break _exit" "Breakpoint $decimal at .*"
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# Hit the breakpoint on _exit. The address of syscall insn is recorded.
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gdb_test "continue" \
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"Continuing\\..*Breakpoint $decimal.*_exit \\(.*\\).*" \
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"continue to exit"
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gdb_test "display/i \$pc" ".*"
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# Single step until we see a syscall insn or we reach the
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# upper bound of loop iterations.
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set msg "find syscall insn in exit"
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set steps 0
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set max_steps 1000
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gdb_test_multiple "stepi" $msg {
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-re ".*$syscall_insn.*$gdb_prompt $" {
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pass $msg
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}
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-re "x/i .*=>.*\r\n$gdb_prompt $" {
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incr steps
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if {$steps == $max_steps} {
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fail $msg
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} else {
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send_gdb "stepi\n"
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exp_continue
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}
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}
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}
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if {$steps == $max_steps} {
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return
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}
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# Remove the display
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gdb_test_no_output "delete display 1"
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set syscall_insn_addr [get_hexadecimal_valueof "\$pc" "0"]
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gdb_test "continue" "exited normally.*" "continue to end, first time"
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gdb_test "inferior 1" ".*Switching to inferior 1.*" \
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"switch back to inferior 1, first time"
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delete_breakpoints
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gdb_test "break marker"
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gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \
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"continue to marker, first time"
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# Step 2, create a breakpoint which evaluates false, and force it
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# evaluated on the target side.
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set test "set breakpoint condition-evaluation target"
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gdb_test_multiple $test $test {
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-re "warning: Target does not support breakpoint condition evaluation.\r\nUsing host evaluation mode instead.\r\n$gdb_prompt $" {
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# Target doesn't support breakpoint condition evaluation
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# on its side, but it is no harm to run the test.
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}
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-re "^$test\r\n$gdb_prompt $" {
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}
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}
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gdb_test "break \*$syscall_insn_addr if main == 0" \
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"Breakpoint \[0-9\]* at .*" \
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"set conditional break at syscall address"
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# Resume the child process, and the step-over is being done.
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gdb_test "continue" "exited normally.*" "continue to end, second time"
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gdb_test "inferior 1" ".*Switching to inferior 1.*" \
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"switch back to inferior 1, second time"
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# Switch back to the parent process, continue to the marker to
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# test GDBserver's state is still correct.
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gdb_test "continue" "Continuing\\..*Breakpoint $decimal, .*" \
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"continue to marker, second time"
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