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kernel: Prevent kernel threads from calling exit_and_signal_parent()
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Kernel threads are supposed to use kernel_exit() instead, so it makes no sense to have an extra branch for them.
This commit is contained in:
apio 2024-06-23 22:53:30 +02:00
parent 907049c405
commit 2ce2d57eff
Signed by: apio
GPG Key ID: B8A7D06E42258954
1 changed files with 38 additions and 41 deletions
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79
kernel/src/thread/Thread.cpp
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@ -104,56 +104,53 @@ Result<SharedPtr<VFS::Inode>> Thread::resolve_atfile(int dirfd, const String& pa
[[noreturn]] void Thread::exit_and_signal_parent(int _status)
{
check(!is_kernel);
#ifndef MOON_ENABLE_TESTING_FEATURES
if (this->id == 1) fail("the init process exited");
#else
if (this->id == 1) CPU::magic_exit(_status);
#endif
if (is_kernel) {
state = ThreadState::Dying;
Scheduler::signal_reap_thread();
}
else
Scheduler::for_each_child(this, [](Thread* child) {
child->parent = Scheduler::init_thread();
return true;
});
if (is_session_leader())
{
Scheduler::for_each_child(this, [](Thread* child) {
child->parent = Scheduler::init_thread();
kinfoln("thread %d is exiting as a session leader, sending signals to session", id);
// FIXME: Send SIGHUP only to the foreground process group if the session has a controlling terminal.
Scheduler::for_each_in_session(sid, [this](Thread* thread) {
if (thread == this) return true;
thread->sid = 0;
thread->controlling_terminal = {};
thread->send_signal(SIGHUP);
kinfoln("reparenting and sending SIGHUP to %d", thread->id);
return true;
});
if (is_session_leader())
{
kinfoln("thread %d is exiting as a session leader, sending signals to session", id);
// FIXME: Send SIGHUP only to the foreground process group if the session has a controlling terminal.
Scheduler::for_each_in_session(sid, [this](Thread* thread) {
if (thread == this) return true;
thread->sid = 0;
thread->controlling_terminal = {};
thread->send_signal(SIGHUP);
kinfoln("reparenting and sending SIGHUP to %d", thread->id);
return true;
});
}
if (parent)
{
if (parent->state == ThreadState::Waiting)
{
auto child = *parent->child_being_waited_for;
if (child == -1 || child == id)
{
parent->child_being_waited_for = id;
parent->wake_up();
}
}
else
{
while (parent->pending_signals.get(SIGCHLD - 1)) kernel_yield();
parent->send_signal(SIGCHLD);
}
}
state = ThreadState::Exited;
}
if (parent)
{
if (parent->state == ThreadState::Waiting)
{
auto child = *parent->child_being_waited_for;
if (child == -1 || child == id)
{
parent->child_being_waited_for = id;
parent->wake_up();
}
}
else
{
while (parent->pending_signals.get(SIGCHLD - 1)) kernel_yield();
parent->send_signal(SIGCHLD);
}
}
state = ThreadState::Exited;
status = _status;
kernel_yield();
unreachable();