Use likelihood attributes in NCE + Fix System Version + SVC improvements

The SVCs improvements are as follows:
* Make SVC logs more concise for:
* * `SleepThread`
* * `ClearEvent`
* * `CloseHandle`
* * `ResetSignal`
* * `WaitSynchronization` (Special case for single handle)
* * `ArbitrateLock`
* * `ArbitrateUnlock`
* * `WaitProcessWideKeyAtomic`
* * `SignalProcessWideKey`
* Fix unintentional fallthrough into `yieldWithoutCoreMigration` from `yieldWithCoreMigration` in `SleepThread`
* Return `result::InvalidState` when an unsignalled handle is reset in `ResetSignal`
* Return `Result{}` (Success) in `CancelSynchronization`
* Do not return `result::InvalidCurrentMemory` in `ArbitrateLock` as it's not a failure condition
* Make `count` in `WaitProcessWideKeyAtomic` a `i32` from a `u32`, zero and all negative values result in waking all waiters
This commit is contained in:
PixelyIon 2021-02-22 00:10:18 +05:30 committed by ◱ Mark
parent 1884d98163
commit 11c5f50d37
7 changed files with 55 additions and 44 deletions

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@ -171,10 +171,7 @@
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@ -288,7 +288,7 @@ namespace skyline::kernel::svc {
i64 in{static_cast<i64>(state.ctx->gpr.x0)};
if (in > 0) {
state.logger->Debug("svcSleepThread: Thread sleeping for {} ns", in);
state.logger->Debug("svcSleepThread: Sleeping for {}ns", in);
struct timespec spec{
.tv_sec = static_cast<time_t>(in / 1000000000),
@ -302,6 +302,8 @@ namespace skyline::kernel::svc {
case yieldWithCoreMigration:
state.logger->Debug("svcSleepThread: Waking any appropriate parked threads");
state.scheduler->WakeParkedThread();
break;
case yieldWithoutCoreMigration:
state.logger->Debug("svcSleepThread: Cooperative Yield");
state.scheduler->Rotate();
@ -447,7 +449,7 @@ namespace skyline::kernel::svc {
KHandle handle{state.ctx->gpr.w0};
try {
std::static_pointer_cast<type::KEvent>(state.process->GetHandle(handle))->ResetSignal();
state.logger->Debug("svcClearEvent: Clearing event: 0x{:X}", handle);
state.logger->Debug("svcClearEvent: Clearing 0x{:X}", handle);
state.ctx->gpr.w0 = Result{};
} catch (const std::out_of_range &) {
state.logger->Warn("svcClearEvent: 'handle' invalid: 0x{:X}", handle);
@ -525,7 +527,7 @@ namespace skyline::kernel::svc {
KHandle handle{static_cast<KHandle>(state.ctx->gpr.w0)};
try {
state.process->CloseHandle(handle);
state.logger->Debug("svcCloseHandle: Closing handle: 0x{:X}", handle);
state.logger->Debug("svcCloseHandle: Closing 0x{:X}", handle);
state.ctx->gpr.w0 = Result{};
} catch (const std::out_of_range &) {
state.logger->Warn("svcCloseHandle: 'handle' invalid: 0x{:X}", handle);
@ -540,7 +542,7 @@ namespace skyline::kernel::svc {
switch (object->objectType) {
case type::KType::KEvent:
case type::KType::KProcess:
std::static_pointer_cast<type::KSyncObject>(object)->ResetSignal();
state.ctx->gpr.w0 = std::static_pointer_cast<type::KSyncObject>(object)->ResetSignal() ? Result{} : result::InvalidState;
break;
default: {
@ -550,7 +552,7 @@ namespace skyline::kernel::svc {
}
}
state.logger->Debug("svcResetSignal: Resetting signal: 0x{:X}", handle);
state.logger->Debug("svcResetSignal: Resetting 0x{:X}", handle);
state.ctx->gpr.w0 = Result{};
} catch (const std::out_of_range &) {
state.logger->Warn("svcResetSignal: 'handle' invalid: 0x{:X}", handle);
@ -572,11 +574,7 @@ namespace skyline::kernel::svc {
std::vector<std::shared_ptr<type::KSyncObject>> objectTable;
objectTable.reserve(numHandles);
std::string handleString;
for (const auto &handle : waitHandles) {
if (Logger::LogLevel::Debug <= state.logger->configLevel)
handleString += fmt::format("* 0x{:X}\n", handle);
auto object{state.process->GetHandle(handle)};
switch (object->objectType) {
case type::KType::KProcess:
@ -595,7 +593,14 @@ namespace skyline::kernel::svc {
}
i64 timeout{static_cast<i64>(state.ctx->gpr.x3)};
state.logger->Debug("svcWaitSynchronization: Waiting on handles:\n{}Timeout: {}ns", handleString, timeout);
if (waitHandles.size() == 1) {
state.logger->Debug("svcWaitSynchronization: Waiting on 0x{:X} for {}ns", waitHandles[0], timeout);
} else if (Logger::LogLevel::Debug <= state.logger->configLevel) {
std::string handleString;
for (const auto &handle : waitHandles)
handleString += fmt::format("* 0x{:X}\n", handle);
state.logger->Debug("svcWaitSynchronization: Waiting on handles:\n{}Timeout: {}ns", handleString, timeout);
}
std::unique_lock lock(type::KSyncObject::syncObjectMutex);
if (state.thread->cancelSync) {
@ -607,7 +612,7 @@ namespace skyline::kernel::svc {
u32 index{};
for (const auto &object : objectTable) {
if (object->signalled) {
state.logger->Debug("svcWaitSynchronization: Signalled handle: 0x{:X}", waitHandles[index]);
state.logger->Debug("svcWaitSynchronization: Signalled 0x{:X}", waitHandles[index]);
state.ctx->gpr.w0 = Result{};
state.ctx->gpr.w1 = index;
return;
@ -655,7 +660,7 @@ namespace skyline::kernel::svc {
}
if (wakeObject) {
state.logger->Debug("svcWaitSynchronization: Signalled handle: 0x{:X}", waitHandles[wakeIndex]);
state.logger->Debug("svcWaitSynchronization: Signalled 0x{:X}", waitHandles[wakeIndex]);
state.ctx->gpr.w0 = Result{};
state.ctx->gpr.w1 = wakeIndex;
} else if (state.thread->cancelSync) {
@ -680,6 +685,7 @@ namespace skyline::kernel::svc {
thread->isCancellable = false;
state.scheduler->InsertThread(thread);
}
state.ctx->gpr.w0 = Result{};
} catch (const std::out_of_range &) {
state.logger->Warn("svcCancelSynchronization: 'handle' invalid: 0x{:X}", static_cast<u32>(state.ctx->gpr.w0));
state.ctx->gpr.w0 = result::InvalidHandle;
@ -687,24 +693,24 @@ namespace skyline::kernel::svc {
}
void ArbitrateLock(const DeviceState &state) {
auto pointer{reinterpret_cast<u32 *>(state.ctx->gpr.x1)};
if (!util::WordAligned(pointer)) {
state.logger->Warn("svcArbitrateLock: 'pointer' not word aligned: 0x{:X}", pointer);
auto mutex{reinterpret_cast<u32 *>(state.ctx->gpr.x1)};
if (!util::WordAligned(mutex)) {
state.logger->Warn("svcArbitrateLock: 'mutex' not word aligned: 0x{:X}", mutex);
state.ctx->gpr.w0 = result::InvalidAddress;
return;
}
state.logger->Debug("svcArbitrateLock: Locking mutex at 0x{:X}", pointer);
state.logger->Debug("svcArbitrateLock: Locking 0x{:X}", mutex);
KHandle ownerHandle{state.ctx->gpr.w0};
KHandle requesterHandle{state.ctx->gpr.w2};
auto result{state.process->MutexLock(pointer, ownerHandle, requesterHandle)};
auto result{state.process->MutexLock(mutex, ownerHandle, requesterHandle)};
if (result == Result{})
state.logger->Debug("svcArbitrateLock: Locked mutex at 0x{:X}", pointer);
state.logger->Debug("svcArbitrateLock: Locked 0x{:X}", mutex);
else if (result == result::InvalidCurrentMemory)
result = Result{}; // If the mutex value isn't expected then it's still successful
else if (result == result::InvalidHandle)
state.logger->Warn("svcArbitrateLock: 'ownerHandle' invalid: 0x{:X}", ownerHandle);
else if (result == result::InvalidCurrentMemory)
state.logger->Debug("svcArbitrateLock: Owner handle did not match current owner for mutex or didn't have waiter flag at 0x{:X}", pointer);
state.ctx->gpr.w0 = result;
}
@ -717,9 +723,9 @@ namespace skyline::kernel::svc {
return;
}
state.logger->Debug("svcArbitrateUnlock: Unlocking mutex at 0x{:X}", mutex);
state.logger->Debug("svcArbitrateUnlock: Unlocking 0x{:X}", mutex);
state.process->MutexUnlock(mutex);
state.logger->Debug("svcArbitrateUnlock: Unlocked mutex at 0x{:X}", mutex);
state.logger->Debug("svcArbitrateUnlock: Unlocked 0x{:X}", mutex);
state.ctx->gpr.w0 = Result{};
}
@ -736,22 +742,22 @@ namespace skyline::kernel::svc {
KHandle requesterHandle{state.ctx->gpr.w2};
i64 timeout{static_cast<i64>(state.ctx->gpr.x3)};
state.logger->Debug("svcWaitProcessWideKeyAtomic: Mutex: 0x{:X}, Conditional-Variable: 0x{:X}, Timeout: {}ns", mutex, conditional, timeout);
state.logger->Debug("svcWaitProcessWideKeyAtomic: Waiting on 0x{:X} with 0x{:X} for {}ns", conditional, mutex, timeout);
auto result{state.process->ConditionalVariableWait(conditional, mutex, requesterHandle, timeout)};
if (result == Result{})
state.logger->Debug("svcWaitProcessWideKeyAtomic: Waited for conditional variable (0x{:X}) and reacquired mutex", conditional);
state.logger->Debug("svcWaitProcessWideKeyAtomic: Waited for 0x{:X} and reacquired 0x{:X}", conditional, mutex);
else if (result == result::TimedOut)
state.logger->Debug("svcWaitProcessWideKeyAtomic: Wait has timed out ({}ns) for 0x{:X}", timeout, conditional);
state.logger->Debug("svcWaitProcessWideKeyAtomic: Wait on 0x{:X} has timed out after {}ns", conditional, timeout);
state.ctx->gpr.w0 = result;
}
void SignalProcessWideKey(const DeviceState &state) {
auto key{reinterpret_cast<u32 *>(state.ctx->gpr.x0)};
KHandle count{state.ctx->gpr.w1};
auto conditional{reinterpret_cast<u32 *>(state.ctx->gpr.x0)};
i32 count{static_cast<i32>(state.ctx->gpr.w1)};
state.logger->Debug("svcSignalProcessWideKey: Signalling Conditional-Variable at 0x{:X} for {}", key, count);
state.process->ConditionalVariableSignal(key, count);
state.logger->Debug("svcSignalProcessWideKey: Signalling 0x{:X} for {} waiters", conditional, count);
state.process->ConditionalVariableSignal(conditional, count);
state.ctx->gpr.w0 = Result{};
}

View File

@ -245,7 +245,6 @@ namespace skyline::kernel::type {
state.scheduler->RemoveThread();
MutexUnlock(mutex);
__sync_synchronize();
}
if (timeout > 0 && !state.scheduler->TimedWaitSchedule(std::chrono::nanoseconds(timeout))) {
@ -255,9 +254,11 @@ namespace skyline::kernel::type {
if (iterator != queue.second)
if (syncWaiters.erase(iterator) == queue.second)
__atomic_store_n(key, false, __ATOMIC_SEQ_CST);
lock.unlock();
state.scheduler->InsertThread(state.thread);
state.scheduler->WaitSchedule();
return result::TimedOut;
} else {
state.scheduler->WaitSchedule(false);
@ -275,13 +276,15 @@ namespace skyline::kernel::type {
}
}
void KProcess::ConditionalVariableSignal(u32 *key, u64 amount) {
void KProcess::ConditionalVariableSignal(u32 *key, i32 amount) {
std::lock_guard lock(syncWaiterMutex);
auto queue{syncWaiters.equal_range(key)};
auto it{queue.first};
if (queue.first != queue.second)
for (; it != queue.second && amount; it = syncWaiters.erase(it), amount--)
for (i32 waiterCount{amount}; it != queue.second && (amount <= 0 || waiterCount); it = syncWaiters.erase(it), waiterCount--)
state.scheduler->InsertThread(it->second);
if (it == queue.second)
__atomic_store_n(key, false, __ATOMIC_SEQ_CST); // We need to update the boolean flag denoting that there are no more threads waiting on this conditional variable
}

View File

@ -221,7 +221,7 @@ namespace skyline {
/**
* @brief Signals the conditional variable at the specified address
*/
void ConditionalVariableSignal(u32 *key, u64 amount);
void ConditionalVariableSignal(u32 *key, i32 amount);
/**
* @brief Waits on the supplied address with the specified arbitration function

View File

@ -14,7 +14,7 @@ namespace skyline::kernel::type {
public:
inline static std::mutex syncObjectMutex; //!< A global lock used for locking all signalling to avoid races
std::list<std::shared_ptr<KThread>> syncObjectWaiters; //!< A list of threads waiting on this object to be signalled
std::atomic<bool> signalled; //!< If the current object is signalled (An object stays signalled till the signal has been explicitly reset)
bool signalled; //!< If the current object is signalled (An object stays signalled till the signal has been explicitly reset)
/**
* @param presignalled If this object should be signalled initially or not
@ -28,10 +28,15 @@ namespace skyline::kernel::type {
/**
* @brief Resets the object to an unsignalled state
* @return If the signal was reset or not
*/
inline void ResetSignal() {
inline bool ResetSignal() {
std::lock_guard lock(syncObjectMutex);
signalled = false;
if (signalled) {
signalled = false;
return true;
}
return false;
}
virtual ~KSyncObject() = default;

View File

@ -18,14 +18,14 @@ namespace skyline::nce {
const auto &state{*ctx->state};
try {
auto function{kernel::svc::SvcTable[svc]};
if (function) {
if (function) [[likely]] {
state.logger->Debug("SVC called 0x{:X}", svc);
(*function)(state);
} else {
} else [[unlikely]] {
throw exception("Unimplemented SVC 0x{:X}", svc);
}
while (kernel::Scheduler::YieldPending) {
while (kernel::Scheduler::YieldPending) [[unlikely]] {
state.scheduler->Rotate(false);
kernel::Scheduler::YieldPending = false;
state.scheduler->WaitSchedule();

View File

@ -7,7 +7,7 @@ namespace skyline::service::settings {
ISystemSettingsServer::ISystemSettingsServer(const DeviceState &state, ServiceManager &manager) : BaseService(state, manager) {}
Result ISystemSettingsServer::GetFirmwareVersion(type::KSession &session, ipc::IpcRequest &request, ipc::IpcResponse &response) {
request.outputBuf.at(0).as<SysVerTitle>() = {.major=5, .minor=0, .micro=0, .revMajor=4, .revMinor=0, .platform="NX", .verHash="4de65c071fd0869695b7629f75eb97b2551dbf2f", .dispVer="9.0.0", .dispTitle="NintendoSDK Firmware for NX 9.0.0-4.0"};
request.outputBuf.at(0).as<SysVerTitle>() = {.major=9, .minor=0, .micro=0, .revMajor=4, .revMinor=0, .platform="NX", .verHash="4de65c071fd0869695b7629f75eb97b2551dbf2f", .dispVer="9.0.0", .dispTitle="NintendoSDK Firmware for NX 9.0.0-4.0"};
return {};
}
}