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Kernel: Modify TimeManagement::current_time(..) API so it can't fail. (#6869)

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The fact that current_time can "fail" makes its use a bit awkward.
All callers in the Kernel are trusted besides syscalls, so assert
that they never get there, and make sure all current callers perform
validation of the clock_id with TimeManagement::is_valid_clock_id().

I have fuzzed this change locally for a bit to make sure I didn't
miss any obvious regression.
This commit is contained in:
Brian Gianforcaro 2021-05-05 16:51:06 +00:00 • committed by GitHub
parent 64b4e3f34b
commit 11306d7121
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6 changed files with 14 additions and 13 deletions
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2
Kernel/Syscalls/alarm.cpp
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@ -25,7 +25,7 @@ KResultOr<unsigned> Process::sys$alarm(unsigned seconds)
}
if (seconds > 0) {
auto deadline = TimeManagement::the().current_time(CLOCK_REALTIME_COARSE).value();
auto deadline = TimeManagement::the().current_time(CLOCK_REALTIME_COARSE);
deadline = deadline + Time::from_seconds(seconds);
m_alarm_timer = TimerQueue::the().add_timer_without_id(CLOCK_REALTIME_COARSE, deadline, [this]() {
[[maybe_unused]] auto rc = send_signal(SIGALRM, nullptr);