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# Copyright 2015-2025 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/>.
# This file is part of the gdb testsuite.
#
# This test tests time syscall for reverse execution.
#
require supports_reverse
standard_testfile
# MODE is either "syscall" for testing the time syscall explicitly, or
# "c" for testing the C time(2) function.
proc test {mode} {
set options {debug}
if {$mode == "syscall"} {
lappend options additional_flags=-DUSE_SYSCALL
} elseif {$mode != "c"} {
error "unrecognized mode: $mode"
}
if { [prepare_for_testing "failed to prepare" $::testfile-$mode $::srcfile $options] } {
return
}
runto marker1
if [supports_process_record] {
# Activate process record/replay
gdb_test_no_output "record" "turn on process record"
}
gdb_test "break marker2" \
"Breakpoint $::decimal at $::hex: file .*$::srcfile, line $::decimal.*" \
"set breakpoint at marker2"
gdb_continue_to_breakpoint "marker2" ".*$::srcfile:.*"
# Show how many instructions we've recorded.
gdb_test "info record" "Active record target: .*"
gdb_test "reverse-continue" ".*$::srcfile:$::decimal.*" "reverse to marker1"
# If the variable was recorded properly, the old contents (-1)
# will be remembered. If not, new contents (current time) will be
# used, and the test will fail.
gdb_test "print time_global" ".* = -1" "check time record"
}
# Test both using the syscall explicitly, and using the time(2) C
# function.
#
# The C variant ensures that if some platform uses some syscall we are
# not aware of yet, we'll still exercise it (and likely fail).
#
# The explicit syscall variant is useful on platforms where the C
# function does not call a syscall at all by default, e.g., on some
# systems the C time function wraps an implementation provided by the
# vDSO.
foreach_with_prefix mode {syscall c} {
if {$mode == "syscall" && ![have_syscall time]} {
continue
}
test $mode
}
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