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kern: update process/thread for new running/termination semantics

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This commit is contained in:
Michael Scire
2021-04-07 08:17:15 -07:00
committed by SciresM
parent ec1d9c4c49
commit 256eb92f4c
8 changed files with 76 additions and 82 deletions
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60
libraries/libmesosphere/source/kern_k_thread.cpp
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@@ -184,7 +184,6 @@ namespace ams::kern {
if (owner != nullptr) {
m_parent = owner;
m_parent->Open();
m_parent->IncrementThreadCount();
}
/* Initialize thread context. */
@@ -312,11 +311,6 @@ namespace ams::kern {
CleanupKernelStack(reinterpret_cast<uintptr_t>(m_kernel_stack_top));
}
/* Decrement the parent process's thread count. */
if (m_parent != nullptr) {
m_parent->DecrementThreadCount();
}
/* Perform inherited finalization. */
KAutoObjectWithSlabHeapAndContainer<KThread, KSynchronizationObject>::Finalize();
}
@@ -444,11 +438,7 @@ namespace ams::kern {
m_suspend_allowed_flags &= ~(1 << (SuspendType_Thread + ThreadState_SuspendShift));
/* Update our state. */
const ThreadState old_state = m_thread_state;
m_thread_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
if (m_thread_state != old_state) {
KScheduler::OnThreadStateChanged(this, old_state);
}
this->UpdateState();
}
/* Update our SVC access permissions. */
@@ -499,11 +489,7 @@ namespace ams::kern {
}
/* Update our state. */
const ThreadState old_state = m_thread_state;
m_thread_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
if (m_thread_state != old_state) {
KScheduler::OnThreadStateChanged(this, old_state);
}
this->UpdateState();
}
/* Update our SVC access permissions. */
@@ -790,11 +776,7 @@ namespace ams::kern {
m_suspend_request_flags &= ~(1u << (ThreadState_SuspendShift + type));
/* Update our state. */
const ThreadState old_state = m_thread_state;
m_thread_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
if (m_thread_state != old_state) {
KScheduler::OnThreadStateChanged(this, old_state);
}
this->UpdateState();
}
void KThread::WaitCancel() {
@@ -830,20 +812,22 @@ namespace ams::kern {
MESOSPHERE_ABORT_UNLESS(this->GetNumKernelWaiters() == 0);
/* Perform the suspend. */
this->Suspend();
this->UpdateState();
}
void KThread::Suspend() {
void KThread::UpdateState() {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
MESOSPHERE_ASSERT(this->IsSuspendRequested());
/* Set our suspend flags in state. */
const auto old_state = m_thread_state;
m_thread_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
const auto new_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
m_thread_state = new_state;
/* Note the state change in scheduler. */
KScheduler::OnThreadStateChanged(this, old_state);
if (new_state != old_state) {
KScheduler::OnThreadStateChanged(this, old_state);
}
}
void KThread::Continue() {
@@ -1137,15 +1121,21 @@ namespace ams::kern {
/* If the current thread has been asked to suspend, suspend it and retry. */
if (GetCurrentThread().IsSuspended()) {
GetCurrentThread().Suspend();
GetCurrentThread().UpdateState();
continue;
}
/* If we're not a kernel thread and we've been asked to suspend, suspend ourselves. */
if (this->IsUserThread() && this->IsSuspended()) {
this->Suspend();
if (KProcess *parent = this->GetOwnerProcess(); parent != nullptr) {
if (this->IsSuspended()) {
this->UpdateState();
}
parent->IncrementRunningThreadCount();
}
/* Open a reference, now that we're running. */
this->Open();
/* Set our state and finish. */
this->SetState(KThread::ThreadState_Runnable);
return ResultSuccess();
@@ -1160,10 +1150,11 @@ namespace ams::kern {
/* Call the debug callback. */
KDebug::OnExitThread(this);
/* Release the thread resource hint from parent. */
/* Release the thread resource hint, running thread count from parent. */
if (m_parent != nullptr) {
m_parent->ReleaseResource(ams::svc::LimitableResource_ThreadCountMax, 0, 1);
m_resource_limit_release_hint = true;
m_parent->DecrementRunningThreadCount();
}
/* Perform termination. */
@@ -1172,6 +1163,7 @@ namespace ams::kern {
/* Disallow all suspension. */
m_suspend_allowed_flags = 0;
this->UpdateState();
/* Start termination. */
this->StartTermination();
@@ -1183,7 +1175,7 @@ namespace ams::kern {
MESOSPHERE_PANIC("KThread::Exit() would return");
}
void KThread::Terminate() {
Result KThread::Terminate() {
MESOSPHERE_ASSERT_THIS();
MESOSPHERE_ASSERT(this != GetCurrentThreadPointer());
@@ -1192,7 +1184,9 @@ namespace ams::kern {
/* If the thread isn't terminated, wait for it to terminate. */
s32 index;
KSynchronizationObject *objects[] = { this };
KSynchronizationObject::Wait(std::addressof(index), objects, 1, ams::svc::WaitInfinite);
return KSynchronizationObject::Wait(std::addressof(index), objects, 1, ams::svc::WaitInfinite);
} else {
return ResultSuccess();
}
}
@@ -1223,7 +1217,7 @@ namespace ams::kern {
/* If the thread is suspended, continue it. */
if (this->IsSuspended()) {
m_suspend_allowed_flags = 0;
this->Continue();
this->UpdateState();
}
/* Change the thread's priority to be higher than any system thread's. */