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# Copyright (C) 2011-2020 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/>.
# Test that GDB doesn't inadvertently resume the stepped thread when a
# signal arrives while stepping over the breakpoint that last caused a
# stop, when the thread that hit that breakpoint is not the stepped
# thread.
# Test relies on checking gdb debug output. Do not run if gdb debug is
# enabled as any debug will be redirected to the log.
if [gdb_debug_enabled] {
continue
}
standard_testfile
set executable ${testfile}
if [target_info exists gdb,nosignals] {
verbose "Skipping ${testfile}.exp because of nosignals."
return -1
}
if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
executable [list debug "incdir=${objdir}"]] != "" } {
return -1
}
proc get_value {var test} {
global expect_out
global gdb_prompt
global decimal
set value -1
gdb_test_multiple "print $var" "$test" {
-re ".*= ($decimal).*\r\n$gdb_prompt $" {
set value $expect_out(1,string)
pass "$test"
}
}
return ${value}
}
# Start with a fresh gdb.
clean_restart $executable
if ![runto_main] {
return -1
}
gdb_breakpoint [gdb_get_line_number "set wait-thread-2 breakpoint here"]
gdb_continue_to_breakpoint "run to wait-thread-2 breakpoint"
gdb_test "info threads" "" "info threads with thread 2"
gdb_breakpoint [gdb_get_line_number "set wait-thread-3 breakpoint here"]
gdb_continue_to_breakpoint "run to breakpoint"
gdb_test "info threads" "" "info threads with thread 3"
gdb_test "set scheduler-locking on"
gdb_breakpoint [gdb_get_line_number "set breakpoint child_two here"]
gdb_breakpoint [gdb_get_line_number "set breakpoint child_one here"]
gdb_test "thread 3" "" "switch to thread 3 to run to its breakpoint"
gdb_continue_to_breakpoint "run to breakpoint in thread 3"
gdb_test "thread 2" "" "switch to thread 2 to run to its breakpoint"
gdb_continue_to_breakpoint "run to breakpoint in thread 2"
delete_breakpoints
gdb_test "b *\$pc" "" "set breakpoint to be stepped over"
# Make sure the first loop breaks without hitting the breakpoint
# again.
gdb_test "p *myp = 0" " = 0" "force loop break in thread 2"
# We want "print" to make sure the target reports the signal to the
# core.
gdb_test "handle SIGUSR1 print nostop pass" "" ""
gdb_test "thread 1" "" "switch to thread 1 to queue signal in thread 2"
gdb_test "next 2" "pthread_join .*" "queue signal in thread 2"
gdb_test "thread 3" "" "switch to thread 3 for stepping"
set my_number [get_value "my_number" "get my_number"]
set cnt_before [get_value "args\[$my_number\]" "get count before step"]
gdb_test "set scheduler-locking off"
# Make sure we're exercising the paths we want to.
gdb_test "set debug infrun 1"
set test "step"
gdb_test_sequence $test $test {
"need to step-over"
"resume \\(step=1"
"signal arrived while stepping over breakpoint"
"stepped to a different line"
"callme"
}
set cnt_after [get_value "args\[$my_number\]" "get count after step"]
# Test that GDB doesn't inadvertently resume the stepped thread when a
# signal arrives while stepping over a breakpoint in another thread.
gdb_assert { $cnt_before + 1 == $cnt_after } "stepped thread under control"
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