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kernel: Resolve sign conversion warnings

Browse source 
Uncovered a bug within Thread's SetCoreAndAffinityMask() where an
unsigned variable (ideal_core) was being compared against "< 0", which
would always be a false condition.

We can also get rid of an unused function (GetNextProcessorId) which contained a sign
mismatch warning.
This commit is contained in:
Lioncash 2019-11-12 03:32:53 -05:00
parent 86c397dd6e
commit 12dc918937
4 changed files with 60 additions and 72 deletions
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46
src/core/hle/kernel/scheduler.cpp
View file

@ -35,12 +35,12 @@ void GlobalScheduler::RemoveThread(const Thread* thread) {
thread_list.end());
}
void GlobalScheduler::UnloadThread(s32 core) {
void GlobalScheduler::UnloadThread(std::size_t core) {
Scheduler& sched = system.Scheduler(core);
sched.UnloadThread();
}
void GlobalScheduler::SelectThread(u32 core) {
void GlobalScheduler::SelectThread(std::size_t core) {
const auto update_thread = [](Thread* thread, Scheduler& sched) {
if (thread != sched.selected_thread) {
if (thread == nullptr) {
@ -77,9 +77,9 @@ void GlobalScheduler::SelectThread(u32 core) {
// if we got a suggested thread, select it, else do a second pass.
if (winner && winner->GetPriority() > 2) {
if (winner->IsRunning()) {
UnloadThread(winner->GetProcessorID());
UnloadThread(static_cast<u32>(winner->GetProcessorID()));
}
TransferToCore(winner->GetPriority(), core, winner);
TransferToCore(winner->GetPriority(), static_cast<s32>(core), winner);
update_thread(winner, sched);
return;
}
@ -91,9 +91,9 @@ void GlobalScheduler::SelectThread(u32 core) {
Thread* thread_on_core = scheduled_queue[src_core].front();
Thread* to_change = *it;
if (thread_on_core->IsRunning() || to_change->IsRunning()) {
UnloadThread(src_core);
UnloadThread(static_cast<u32>(src_core));
}
TransferToCore(thread_on_core->GetPriority(), core, thread_on_core);
TransferToCore(thread_on_core->GetPriority(), static_cast<s32>(core), thread_on_core);
current_thread = thread_on_core;
break;
}
@ -154,9 +154,9 @@ bool GlobalScheduler::YieldThreadAndBalanceLoad(Thread* yielding_thread) {
if (winner != nullptr) {
if (winner != yielding_thread) {
if (winner->IsRunning()) {
UnloadThread(winner->GetProcessorID());
UnloadThread(static_cast<u32>(winner->GetProcessorID()));
}
TransferToCore(winner->GetPriority(), core_id, winner);
TransferToCore(winner->GetPriority(), s32(core_id), winner);
}
} else {
winner = next_thread;
@ -196,9 +196,9 @@ bool GlobalScheduler::YieldThreadAndWaitForLoadBalancing(Thread* yielding_thread
if (winner != nullptr) {
if (winner != yielding_thread) {
if (winner->IsRunning()) {
UnloadThread(winner->GetProcessorID());
UnloadThread(static_cast<u32>(winner->GetProcessorID()));
}
TransferToCore(winner->GetPriority(), core_id, winner);
TransferToCore(winner->GetPriority(), static_cast<s32>(core_id), winner);
}
} else {
winner = yielding_thread;
@ -248,7 +248,7 @@ void GlobalScheduler::PreemptThreads() {
if (winner != nullptr) {
if (winner->IsRunning()) {
UnloadThread(winner->GetProcessorID());
UnloadThread(static_cast<u32>(winner->GetProcessorID()));
}
TransferToCore(winner->GetPriority(), s32(core_id), winner);
current_thread =
@ -281,7 +281,7 @@ void GlobalScheduler::PreemptThreads() {
if (winner != nullptr) {
if (winner->IsRunning()) {
UnloadThread(winner->GetProcessorID());
UnloadThread(static_cast<u32>(winner->GetProcessorID()));
}
TransferToCore(winner->GetPriority(), s32(core_id), winner);
current_thread = winner;
@ -292,30 +292,30 @@ void GlobalScheduler::PreemptThreads() {
}
}
void GlobalScheduler::Suggest(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::Suggest(u32 priority, std::size_t core, Thread* thread) {
suggested_queue[core].add(thread, priority);
}
void GlobalScheduler::Unsuggest(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::Unsuggest(u32 priority, std::size_t core, Thread* thread) {
suggested_queue[core].remove(thread, priority);
}
void GlobalScheduler::Schedule(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::Schedule(u32 priority, std::size_t core, Thread* thread) {
ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
scheduled_queue[core].add(thread, priority);
}
void GlobalScheduler::SchedulePrepend(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::SchedulePrepend(u32 priority, std::size_t core, Thread* thread) {
ASSERT_MSG(thread->GetProcessorID() == s32(core), "Thread must be assigned to this core.");
scheduled_queue[core].add(thread, priority, false);
}
void GlobalScheduler::Reschedule(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::Reschedule(u32 priority, std::size_t core, Thread* thread) {
scheduled_queue[core].remove(thread, priority);
scheduled_queue[core].add(thread, priority);
}
void GlobalScheduler::Unschedule(u32 priority, u32 core, Thread* thread) {
void GlobalScheduler::Unschedule(u32 priority, std::size_t core, Thread* thread) {
scheduled_queue[core].remove(thread, priority);
}
@ -327,14 +327,14 @@ void GlobalScheduler::TransferToCore(u32 priority, s32 destination_core, Thread*
}
thread->SetProcessorID(destination_core);
if (source_core >= 0) {
Unschedule(priority, source_core, thread);
Unschedule(priority, static_cast<u32>(source_core), thread);
}
if (destination_core >= 0) {
Unsuggest(priority, destination_core, thread);
Schedule(priority, destination_core, thread);
Unsuggest(priority, static_cast<u32>(destination_core), thread);
Schedule(priority, static_cast<u32>(destination_core), thread);
}
if (source_core >= 0) {
Suggest(priority, source_core, thread);
Suggest(priority, static_cast<u32>(source_core), thread);
}
}
@ -357,7 +357,7 @@ void GlobalScheduler::Shutdown() {
thread_list.clear();
}
Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 core_id)
Scheduler::Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, std::size_t core_id)
: system(system), cpu_core(cpu_core), core_id(core_id) {}
Scheduler::~Scheduler() = default;

36
src/core/hle/kernel/scheduler.h
View file

@ -42,41 +42,34 @@ public:
* Add a thread to the suggested queue of a cpu core. Suggested threads may be
* picked if no thread is scheduled to run on the core.
*/
void Suggest(u32 priority, u32 core, Thread* thread);
void Suggest(u32 priority, std::size_t core, Thread* thread);
/**
* Remove a thread to the suggested queue of a cpu core. Suggested threads may be
* picked if no thread is scheduled to run on the core.
*/
void Unsuggest(u32 priority, u32 core, Thread* thread);
void Unsuggest(u32 priority, std::size_t core, Thread* thread);
/**
* Add a thread to the scheduling queue of a cpu core. The thread is added at the
* back the queue in its priority level.
*/
void Schedule(u32 priority, u32 core, Thread* thread);
void Schedule(u32 priority, std::size_t core, Thread* thread);
/**
* Add a thread to the scheduling queue of a cpu core. The thread is added at the
* front the queue in its priority level.
*/
void SchedulePrepend(u32 priority, u32 core, Thread* thread);
void SchedulePrepend(u32 priority, std::size_t core, Thread* thread);
/// Reschedule an already scheduled thread based on a new priority
void Reschedule(u32 priority, u32 core, Thread* thread);
void Reschedule(u32 priority, std::size_t core, Thread* thread);
/// Unschedules a thread.
void Unschedule(u32 priority, u32 core, Thread* thread);
/**
* Transfers a thread into an specific core. If the destination_core is -1
* it will be unscheduled from its source code and added into its suggested
* queue.
*/
void TransferToCore(u32 priority, s32 destination_core, Thread* thread);
void Unschedule(u32 priority, std::size_t core, Thread* thread);
/// Selects a core and forces it to unload its current thread's context
void UnloadThread(s32 core);
void UnloadThread(std::size_t core);
/**
* Takes care of selecting the new scheduled thread in three steps:
@ -90,9 +83,9 @@ public:
* 3. Third is no suggested thread is found, we do a second pass and pick a running
* thread in another core and swap it with its current thread.
*/
void SelectThread(u32 core);
void SelectThread(std::size_t core);
bool HaveReadyThreads(u32 core_id) const {
bool HaveReadyThreads(std::size_t core_id) const {
return !scheduled_queue[core_id].empty();
}
@ -145,6 +138,13 @@ public:
void Shutdown();
private:
/**
* Transfers a thread into an specific core. If the destination_core is -1
* it will be unscheduled from its source code and added into its suggested
* queue.
*/
void TransferToCore(u32 priority, s32 destination_core, Thread* thread);
bool AskForReselectionOrMarkRedundant(Thread* current_thread, const Thread* winner);
static constexpr u32 min_regular_priority = 2;
@ -163,7 +163,7 @@ private:
class Scheduler final {
public:
explicit Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, u32 core_id);
explicit Scheduler(Core::System& system, Core::ARM_Interface& cpu_core, std::size_t core_id);
~Scheduler();
/// Returns whether there are any threads that are ready to run.
@ -220,7 +220,7 @@ private:
Core::ARM_Interface& cpu_core;
u64 last_context_switch_time = 0;
u64 idle_selection_count = 0;
const u32 core_id;
const std::size_t core_id;
bool is_context_switch_pending = false;
};

48
src/core/hle/kernel/thread.cpp
View file

@ -77,18 +77,6 @@ void Thread::CancelWakeupTimer() {
callback_handle);
}
static std::optional<s32> GetNextProcessorId(u64 mask) {
for (s32 index = 0; index < Core::NUM_CPU_CORES; ++index) {
if (mask & (1ULL << index)) {
if (!Core::System::GetInstance().Scheduler(index).GetCurrentThread()) {
// Core is enabled and not running any threads, use this one
return index;
}
}
}
return {};
}
void Thread::ResumeFromWait() {
ASSERT_MSG(wait_objects.empty(), "Thread is waking up while waiting for objects");
@ -173,7 +161,7 @@ ResultVal<SharedPtr<Thread>> Thread::Create(KernelCore& kernel, std::string name
if (!Memory::IsValidVirtualAddress(owner_process, entry_point)) {
LOG_ERROR(Kernel_SVC, "(name={}): invalid entry {:016X}", name, entry_point);
// TODO (bunnei): Find the correct error code to use here
return ResultCode(-1);
return RESULT_UNKNOWN;
}
auto& system = Core::System::GetInstance();
@ -401,7 +389,7 @@ void Thread::SetCurrentPriority(u32 new_priority) {
ResultCode Thread::SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask) {
const auto HighestSetCore = [](u64 mask, u32 max_cores) {
for (s32 core = max_cores - 1; core >= 0; core--) {
for (s32 core = static_cast<s32>(max_cores - 1); core >= 0; core--) {
if (((mask >> core) & 1) != 0) {
return core;
}
@ -425,7 +413,7 @@ ResultCode Thread::SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask) {
if (old_affinity_mask != new_affinity_mask) {
const s32 old_core = processor_id;
if (processor_id >= 0 && ((affinity_mask >> processor_id) & 1) == 0) {
if (ideal_core < 0) {
if (static_cast<s32>(ideal_core) < 0) {
processor_id = HighestSetCore(affinity_mask, GlobalScheduler::NUM_CPU_CORES);
} else {
processor_id = ideal_core;
@ -447,23 +435,23 @@ void Thread::AdjustSchedulingOnStatus(u32 old_flags) {
ThreadSchedStatus::Runnable) {
// In this case the thread was running, now it's pausing/exitting
if (processor_id >= 0) {
scheduler.Unschedule(current_priority, processor_id, this);
scheduler.Unschedule(current_priority, static_cast<u32>(processor_id), this);
}
for (s32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
scheduler.Unsuggest(current_priority, static_cast<u32>(core), this);
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
scheduler.Unsuggest(current_priority, core, this);
}
}
} else if (GetSchedulingStatus() == ThreadSchedStatus::Runnable) {
// The thread is now set to running from being stopped
if (processor_id >= 0) {
scheduler.Schedule(current_priority, processor_id, this);
scheduler.Schedule(current_priority, static_cast<u32>(processor_id), this);
}
for (s32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
scheduler.Suggest(current_priority, static_cast<u32>(core), this);
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
scheduler.Suggest(current_priority, core, this);
}
}
}
@ -477,11 +465,11 @@ void Thread::AdjustSchedulingOnPriority(u32 old_priority) {
}
auto& scheduler = Core::System::GetInstance().GlobalScheduler();
if (processor_id >= 0) {
scheduler.Unschedule(old_priority, processor_id, this);
scheduler.Unschedule(old_priority, static_cast<u32>(processor_id), this);
}
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
scheduler.Unsuggest(old_priority, core, this);
}
}
@ -491,14 +479,14 @@ void Thread::AdjustSchedulingOnPriority(u32 old_priority) {
if (processor_id >= 0) {
if (current_thread == this) {
scheduler.SchedulePrepend(current_priority, processor_id, this);
scheduler.SchedulePrepend(current_priority, static_cast<u32>(processor_id), this);
} else {
scheduler.Schedule(current_priority, processor_id, this);
scheduler.Schedule(current_priority, static_cast<u32>(processor_id), this);
}
}
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (core != processor_id && ((affinity_mask >> core) & 1) != 0) {
if (core != static_cast<u32>(processor_id) && ((affinity_mask >> core) & 1) != 0) {
scheduler.Suggest(current_priority, core, this);
}
}
@ -515,7 +503,7 @@ void Thread::AdjustSchedulingOnAffinity(u64 old_affinity_mask, s32 old_core) {
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (((old_affinity_mask >> core) & 1) != 0) {
if (core == old_core) {
if (core == static_cast<u32>(old_core)) {
scheduler.Unschedule(current_priority, core, this);
} else {
scheduler.Unsuggest(current_priority, core, this);
@ -525,7 +513,7 @@ void Thread::AdjustSchedulingOnAffinity(u64 old_affinity_mask, s32 old_core) {
for (u32 core = 0; core < GlobalScheduler::NUM_CPU_CORES; core++) {
if (((affinity_mask >> core) & 1) != 0) {
if (core == processor_id) {
if (core == static_cast<u32>(processor_id)) {
scheduler.Schedule(current_priority, core, this);
} else {
scheduler.Suggest(current_priority, core, this);

2
src/core/hle/kernel/vm_manager.cpp
View file

@ -167,7 +167,7 @@ ResultVal<VAddr> VMManager::FindFreeRegion(VAddr begin, VAddr end, u64 size) con
if (vma_handle == vma_map.cend()) {
// TODO(Subv): Find the correct error code here.
return ResultCode(-1);
return RESULT_UNKNOWN;
}
const VAddr target = std::max(begin, vma_handle->second.base);