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Get rid of the undertaker and have waitpid() be the reaper.

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For dead orphans, the scheduler calls reap().
This commit is contained in:
Andreas Kling 2018-11-07 23:59:49 +01:00
parent f792349853
commit 1dbc340da8
6 changed files with 45 additions and 60 deletions
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22
Kernel/Scheduler.cpp
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@ -43,7 +43,6 @@ bool Scheduler::pick_next()
if (waitee->state() == Process::Dead) {
process.m_waitee_status = (waitee->m_termination_status << 8) | waitee->m_termination_signal;
process.unblock();
waitee->set_state(Process::Forgiven);
}
return true;
}
@ -66,18 +65,11 @@ bool Scheduler::pick_next()
return true;
}
// Forgive dead orphans.
if (process.state() == Process::Dead) {
if (!Process::from_pid(process.ppid()))
process.set_state(Process::Forgiven);
}
// Release the forgiven.
if (process.state() == Process::Forgiven) {
g_processes->remove(&process);
g_dead_processes->append(&process);
Process::reap(process.pid());
return true;
};
}
return true;
});
@ -241,11 +233,13 @@ void Scheduler::prepare_for_iret_to_new_process()
load_task_register(s_redirection.selector);
}
void Scheduler::prepare_to_modify_own_tss()
void Scheduler::prepare_to_modify_tss(Process& process)
{
// This ensures that a process modifying its own TSS in order to yield()
// and end up somewhere else doesn't just end up right after the yield().
load_task_register(s_redirection.selector);
// This ensures that a currently running process modifying its own TSS
// in order to yield() and end up somewhere else doesn't just end up
// right after the yield().
if (current == &process)
load_task_register(s_redirection.selector);
}
static void hlt_loop()