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kern: update kernel waiter management rules

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This commit is contained in:
Michael Scire 2021-04-07 01:30:36 -07:00 committed by SciresM
parent f67d1b7026
commit 3356eddcba
2 changed files with 5 additions and 2 deletions
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2
libraries/libmesosphere/source/kern_k_process.cpp
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@ -744,7 +744,7 @@ namespace ams::kern {
} }
/* Otherwise, wait for us to not have an exception thread. */ /* Otherwise, wait for us to not have an exception thread. */
cur_thread->SetAddressKey(address_key); cur_thread->SetAddressKey(address_key | 1);
m_exception_thread->AddWaiter(cur_thread); m_exception_thread->AddWaiter(cur_thread);
if (cur_thread->GetState() == KThread::ThreadState_Runnable) { if (cur_thread->GetState() == KThread::ThreadState_Runnable) {
cur_thread->SetState(KThread::ThreadState_Waiting); cur_thread->SetState(KThread::ThreadState_Waiting);

5
libraries/libmesosphere/source/kern_k_thread.cpp
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@ -23,7 +23,7 @@ namespace ams::kern {
constexpr bool IsKernelAddressKey(KProcessAddress key) { constexpr bool IsKernelAddressKey(KProcessAddress key) {
const uintptr_t key_uptr = GetInteger(key); const uintptr_t key_uptr = GetInteger(key);
return KernelVirtualAddressSpaceBase <= key_uptr && key_uptr <= KernelVirtualAddressSpaceLast; return KernelVirtualAddressSpaceBase <= key_uptr && key_uptr <= KernelVirtualAddressSpaceLast && (key_uptr & 1) == 0;
} }
void InitializeKernelStack(uintptr_t stack_top) { void InitializeKernelStack(uintptr_t stack_top) {
@ -996,6 +996,7 @@ namespace ams::kern {
/* Keep track of how many kernel waiters we have. */ /* Keep track of how many kernel waiters we have. */
if (IsKernelAddressKey(thread->GetAddressKey())) { if (IsKernelAddressKey(thread->GetAddressKey())) {
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters++) >= 0); MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters++) >= 0);
KScheduler::SetSchedulerUpdateNeeded();
} }
/* Insert the waiter. */ /* Insert the waiter. */
@ -1010,6 +1011,7 @@ namespace ams::kern {
/* Keep track of how many kernel waiters we have. */ /* Keep track of how many kernel waiters we have. */
if (IsKernelAddressKey(thread->GetAddressKey())) { if (IsKernelAddressKey(thread->GetAddressKey())) {
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0); MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0);
KScheduler::SetSchedulerUpdateNeeded();
} }
/* Remove the waiter. */ /* Remove the waiter. */
@ -1088,6 +1090,7 @@ namespace ams::kern {
/* Keep track of how many kernel waiters we have. */ /* Keep track of how many kernel waiters we have. */
if (IsKernelAddressKey(thread->GetAddressKey())) { if (IsKernelAddressKey(thread->GetAddressKey())) {
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0); MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0);
KScheduler::SetSchedulerUpdateNeeded();
} }
it = m_waiter_list.erase(it); it = m_waiter_list.erase(it);