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Kernel: Add some asserts to enforce the invariants in the scheduler.

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This commit is contained in:
Subv 2017-01-04 12:48:13 -05:00
parent 7f1dca8cd2
commit dda4ec93be
2 changed files with 13 additions and 2 deletions
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8
src/core/hle/kernel/kernel.cpp
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@ -27,6 +27,9 @@ void WaitObject::AddWaitingThread(SharedPtr<Thread> thread) {
void WaitObject::RemoveWaitingThread(Thread* thread) {
auto itr = std::find(waiting_threads.begin(), waiting_threads.end(), thread);
// If a thread passed multiple handles to the same object,
// the kernel might attempt to remove the thread from the object's
// waiting threads list multiple times.
if (itr != waiting_threads.end())
waiting_threads.erase(itr);
}
@ -36,6 +39,11 @@ SharedPtr<Thread> WaitObject::GetHighestPriorityReadyThread() {
s32 candidate_priority = THREADPRIO_LOWEST + 1;
for (const auto& thread : waiting_threads) {
// The list of waiting threads must not contain threads that are not waiting to be awakened.
ASSERT_MSG(thread->status == THREADSTATUS_WAIT_SYNCH_ANY ||
thread->status == THREADSTATUS_WAIT_SYNCH_ALL,
"Inconsistent thread statuses in waiting_threads");
if (thread->current_priority >= candidate_priority)
continue;

7
src/core/hle/kernel/thread.cpp
View File

@ -200,8 +200,8 @@ static void SwitchContext(Thread* new_thread) {
// Load context of new thread
if (new_thread) {
DEBUG_ASSERT_MSG(new_thread->status == THREADSTATUS_READY,
"Thread must be ready to become running.");
ASSERT_MSG(new_thread->status == THREADSTATUS_READY,
"Thread must be ready to become running.");
// Cancel any outstanding wakeup events for this thread
CoreTiming::UnscheduleEvent(ThreadWakeupEventType, new_thread->callback_handle);
@ -307,6 +307,8 @@ void Thread::WakeAfterDelay(s64 nanoseconds) {
}
void Thread::ResumeFromWait() {
ASSERT_MSG(wait_objects.empty(), "Thread is waking up while waiting for objects");
switch (status) {
case THREADSTATUS_WAIT_SYNCH_ALL:
case THREADSTATUS_WAIT_SYNCH_ANY:
@ -580,6 +582,7 @@ void Thread::SetWaitSynchronizationOutput(s32 output) {
}
s32 Thread::GetWaitObjectIndex(WaitObject* object) const {
ASSERT_MSG(!wait_objects.empty(), "Thread is not waiting for anything");
auto match = std::find(wait_objects.rbegin(), wait_objects.rend(), object);
return std::distance(match, wait_objects.rend()) - 1;
}