1 # Copyright (C) 2011-2024 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/>.
16 # Test that GDB doesn't inadvertently resume the stepped thread when a
17 # signal arrives while stepping over the breakpoint that last caused a
18 # stop, when the thread that hit that breakpoint is not the stepped
21 # Test relies on checking gdb debug output. Do not run if gdb debug is
22 # enabled as any debug will be redirected to the log.
23 require !gdb_debug_enabled
26 set executable ${testfile}
28 require {!target_info exists gdb,nosignals}
30 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
31 executable [list debug "incdir=${objdir}"]] != "" } {
35 proc get_value {var test} {
41 gdb_test_multiple "print $var" "$test" {
42 -re ".*= ($decimal).*\r\n$gdb_prompt $" {
43 set value $expect_out(1,string)
50 # Start with a fresh gdb.
52 clean_restart $executable
58 gdb_breakpoint [gdb_get_line_number "set wait-thread-2 breakpoint here"]
59 gdb_continue_to_breakpoint "run to wait-thread-2 breakpoint"
60 gdb_test "info threads" "" "info threads with thread 2"
62 gdb_breakpoint [gdb_get_line_number "set wait-thread-3 breakpoint here"]
63 gdb_continue_to_breakpoint "run to breakpoint"
64 gdb_test "info threads" "" "info threads with thread 3"
66 gdb_test "set scheduler-locking on"
68 gdb_breakpoint [gdb_get_line_number "set breakpoint child_two here"]
69 gdb_breakpoint [gdb_get_line_number "set breakpoint child_one here"]
71 gdb_test "thread 3" "" "switch to thread 3 to run to its breakpoint"
72 gdb_continue_to_breakpoint "run to breakpoint in thread 3"
74 gdb_test "thread 2" "" "switch to thread 2 to run to its breakpoint"
75 gdb_continue_to_breakpoint "run to breakpoint in thread 2"
79 gdb_test "b *\$pc" "" "set breakpoint to be stepped over"
80 # Make sure the first loop breaks without hitting the breakpoint
82 gdb_test "p *myp = 0" " = 0" "force loop break in thread 2"
84 # We want "print" to make sure the target reports the signal to the
86 gdb_test "handle SIGUSR1 print nostop pass" "" ""
88 gdb_test "thread 1" "" "switch to thread 1 to queue signal in thread 2"
89 gdb_test "next 2" "pthread_join .*" "queue signal in thread 2"
91 gdb_test "thread 3" "" "switch to thread 3 for stepping"
92 set my_number [get_value "my_number" "get my_number"]
93 set cnt_before [get_value "args\[$my_number\]" "get count before step"]
94 gdb_test "set scheduler-locking off"
96 # Make sure we're exercising the paths we want to.
97 gdb_test "set debug infrun 1"
100 gdb_test_sequence $test $test -prompt "$gdb_prompt \\\[infrun\\\] fetch_inferior_event: exit\r\n$" {
103 "signal arrived while stepping over breakpoint"
104 "stepped to a different line"
108 set cnt_after [get_value "args\[$my_number\]" "get count after step"]
110 # Test that GDB doesn't inadvertently resume the stepped thread when a
111 # signal arrives while stepping over a breakpoint in another thread.
113 gdb_assert { $cnt_before + 1 == $cnt_after } "stepped thread under control"