mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-26 13:52:21 +00:00
496adb0018
* Work around Clang's incomplete C++20 support for omitting typename * vapours: fix Clang error about missing return in constexpr function * stratosphere: fix call to non-constexpr strlen in constexpr function strlen being constexpr is a non-compliant GCC extension; Clang explicitly rejects it: https://reviews.llvm.org/D23692 * stratosphere: add a bunch of missing override specifiers * stratosphere: work around Clang consteval bug Minimal example: https://godbolt.org/z/MoM64v93M The issue seems to be that Clang does not consider f(x) to be a constant expression if x comes from a template argument that isn't a non-type auto template argument (???) We can work around this by relaxing GetMessageHeaderForCheck (by using constexpr instead of consteval). This produces no functional changes because the result of GetMessageHeaderForCheck() is assigned to a constexpr variable, so the result is guaranteed to be computed at compile-time. * stratosphere: fix missing require clauses in definitions GCC not requiring the require clauses to be repeated for member definitions is actually a compiler bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96830 Clang rejects declarations with missing require clauses. * Fix ALWAYS_INLINE_LAMBDA and parameter list relative order While GCC doesn't seem to care about the position of the always_inline attribute relative to the parameter list, Clang is very picky and requires the attribute to appear after the parameter list (and before a trailing return type) * stratosphere: fix static constexpr member variable with incomplete type GCC accepts this for some reason (because of the lambda?) but Clang correctly rejects this.
1363 lines
51 KiB
C++
1363 lines
51 KiB
C++
/*
|
|
* Copyright (c) Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include <mesosphere.hpp>
|
|
|
|
namespace ams::kern {
|
|
|
|
namespace {
|
|
|
|
constexpr inline s32 TerminatingThreadPriority = ams::svc::SystemThreadPriorityHighest - 1;
|
|
|
|
constinit util::Atomic<u64> g_thread_id = 0;
|
|
|
|
constexpr ALWAYS_INLINE bool IsKernelAddressKey(KProcessAddress key) {
|
|
const uintptr_t key_uptr = GetInteger(key);
|
|
return KernelVirtualAddressSpaceBase <= key_uptr && key_uptr <= KernelVirtualAddressSpaceLast && (key_uptr & 1) == 0;
|
|
}
|
|
|
|
void InitializeKernelStack(uintptr_t stack_top) {
|
|
#if defined(MESOSPHERE_ENABLE_KERNEL_STACK_USAGE)
|
|
const uintptr_t stack_bottom = stack_top - PageSize;
|
|
std::memset(reinterpret_cast<void *>(stack_bottom), 0xCC, PageSize - sizeof(KThread::StackParameters));
|
|
#else
|
|
MESOSPHERE_UNUSED(stack_top);
|
|
#endif
|
|
}
|
|
|
|
void CleanupKernelStack(uintptr_t stack_top) {
|
|
const uintptr_t stack_bottom = stack_top - PageSize;
|
|
|
|
KPhysicalAddress stack_paddr = Null<KPhysicalAddress>;
|
|
MESOSPHERE_ABORT_UNLESS(Kernel::GetKernelPageTable().GetPhysicalAddress(std::addressof(stack_paddr), stack_bottom));
|
|
|
|
MESOSPHERE_R_ABORT_UNLESS(Kernel::GetKernelPageTable().UnmapPages(stack_bottom, 1, KMemoryState_Kernel));
|
|
|
|
/* Free the stack page. */
|
|
KPageBuffer::Free(KPageBuffer::FromPhysicalAddress(stack_paddr));
|
|
}
|
|
|
|
class ThreadQueueImplForKThreadSleep final : public KThreadQueueWithoutEndWait { /* ... */ };
|
|
|
|
class ThreadQueueImplForKThreadSetProperty final : public KThreadQueue {
|
|
private:
|
|
KThread::WaiterList *m_wait_list;
|
|
public:
|
|
constexpr ThreadQueueImplForKThreadSetProperty(KThread::WaiterList *wl) : m_wait_list(wl) { /* ... */ }
|
|
|
|
virtual void CancelWait(KThread *waiting_thread, Result wait_result, bool cancel_timer_task) override {
|
|
/* Remove the thread from the wait list. */
|
|
m_wait_list->erase(m_wait_list->iterator_to(*waiting_thread));
|
|
|
|
/* Invoke the base cancel wait handler. */
|
|
KThreadQueue::CancelWait(waiting_thread, wait_result, cancel_timer_task);
|
|
}
|
|
};
|
|
|
|
}
|
|
|
|
Result KThread::Initialize(KThreadFunction func, uintptr_t arg, void *kern_stack_top, KProcessAddress user_stack_top, s32 prio, s32 virt_core, KProcess *owner, ThreadType type) {
|
|
/* Assert parameters are valid. */
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(kern_stack_top != nullptr);
|
|
MESOSPHERE_ASSERT((type == ThreadType_Main) || (ams::svc::HighestThreadPriority <= prio && prio <= ams::svc::LowestThreadPriority));
|
|
MESOSPHERE_ASSERT((owner != nullptr) || (type != ThreadType_User));
|
|
MESOSPHERE_ASSERT(0 <= virt_core && virt_core < static_cast<s32>(BITSIZEOF(u64)));
|
|
|
|
/* Convert the virtual core to a physical core. */
|
|
const s32 phys_core = cpu::VirtualToPhysicalCoreMap[virt_core];
|
|
MESOSPHERE_ASSERT(0 <= phys_core && phys_core < static_cast<s32>(cpu::NumCores));
|
|
|
|
/* First, clear the TLS address. */
|
|
m_tls_address = Null<KProcessAddress>;
|
|
|
|
const uintptr_t kern_stack_top_address = reinterpret_cast<uintptr_t>(kern_stack_top);
|
|
MESOSPHERE_UNUSED(kern_stack_top_address);
|
|
|
|
/* Next, assert things based on the type. */
|
|
switch (type) {
|
|
case ThreadType_Main:
|
|
{
|
|
MESOSPHERE_ASSERT(arg == 0);
|
|
}
|
|
[[fallthrough]];
|
|
case ThreadType_HighPriority:
|
|
if (type != ThreadType_Main) {
|
|
MESOSPHERE_ASSERT(phys_core == GetCurrentCoreId());
|
|
}
|
|
[[fallthrough]];
|
|
case ThreadType_Kernel:
|
|
{
|
|
MESOSPHERE_ASSERT(user_stack_top == 0);
|
|
MESOSPHERE_ASSERT(util::IsAligned(kern_stack_top_address, PageSize));
|
|
}
|
|
[[fallthrough]];
|
|
case ThreadType_User:
|
|
{
|
|
MESOSPHERE_ASSERT(((owner == nullptr) || (owner->GetCoreMask() | (1ul << virt_core)) == owner->GetCoreMask()));
|
|
MESOSPHERE_ASSERT(((owner == nullptr) || (owner->GetPriorityMask() | (1ul << prio)) == owner->GetPriorityMask()));
|
|
}
|
|
break;
|
|
default:
|
|
MESOSPHERE_PANIC("KThread::Initialize: Unknown ThreadType %u", static_cast<u32>(type));
|
|
break;
|
|
}
|
|
|
|
/* Set the ideal core ID and affinity mask. */
|
|
m_virtual_ideal_core_id = virt_core;
|
|
m_physical_ideal_core_id = phys_core;
|
|
m_virtual_affinity_mask = (static_cast<u64>(1) << virt_core);
|
|
m_physical_affinity_mask.SetAffinity(phys_core, true);
|
|
|
|
/* Set the thread state. */
|
|
m_thread_state = (type == ThreadType_Main) ? ThreadState_Runnable : ThreadState_Initialized;
|
|
|
|
/* Set TLS address and TLS heap address. */
|
|
/* NOTE: Nintendo wrote TLS address above already, but official code really does write tls address twice. */
|
|
m_tls_address = 0;
|
|
m_tls_heap_address = 0;
|
|
|
|
/* Set parent and condvar tree. */
|
|
m_parent = nullptr;
|
|
m_condvar_tree = nullptr;
|
|
m_condvar_key = 0;
|
|
|
|
/* Set sync booleans. */
|
|
m_signaled = false;
|
|
m_termination_requested = false;
|
|
m_wait_cancelled = false;
|
|
m_cancellable = false;
|
|
|
|
/* Set core ID and wait result. */
|
|
m_core_id = phys_core;
|
|
m_wait_result = svc::ResultNoSynchronizationObject();
|
|
|
|
/* Set the stack top. */
|
|
m_kernel_stack_top = kern_stack_top;
|
|
|
|
/* Set priorities. */
|
|
m_priority = prio;
|
|
m_base_priority = prio;
|
|
|
|
/* Initialize wait queue/sync index. */
|
|
m_synced_index = -1;
|
|
m_wait_queue = nullptr;
|
|
|
|
/* Set suspend flags. */
|
|
m_suspend_request_flags = 0;
|
|
m_suspend_allowed_flags = ThreadState_SuspendFlagMask;
|
|
|
|
/* We're neither debug attached, nor are we nesting our priority inheritance. */
|
|
m_debug_attached = false;
|
|
m_priority_inheritance_count = 0;
|
|
|
|
/* We haven't been scheduled, and we have done no light IPC. */
|
|
m_schedule_count = -1;
|
|
m_last_scheduled_tick = 0;
|
|
m_light_ipc_data = nullptr;
|
|
|
|
/* We're not waiting for a lock, and we haven't disabled migration. */
|
|
m_lock_owner = nullptr;
|
|
m_num_core_migration_disables = 0;
|
|
|
|
/* We have no waiters, and no closed objects. */
|
|
m_num_kernel_waiters = 0;
|
|
m_closed_object = nullptr;
|
|
|
|
/* Set our current core id. */
|
|
m_current_core_id = phys_core;
|
|
|
|
/* We haven't released our resource limit hint, and we've spent no time on the cpu. */
|
|
m_resource_limit_release_hint = false;
|
|
m_cpu_time = 0;
|
|
|
|
/* Setup our kernel stack. */
|
|
if (type != ThreadType_Main) {
|
|
InitializeKernelStack(reinterpret_cast<uintptr_t>(kern_stack_top));
|
|
}
|
|
|
|
/* Clear our stack parameters. */
|
|
std::memset(static_cast<void *>(std::addressof(this->GetStackParameters())), 0, sizeof(StackParameters));
|
|
|
|
/* Setup the TLS, if needed. */
|
|
if (type == ThreadType_User) {
|
|
R_TRY(owner->CreateThreadLocalRegion(std::addressof(m_tls_address)));
|
|
m_tls_heap_address = owner->GetThreadLocalRegionPointer(m_tls_address);
|
|
std::memset(m_tls_heap_address, 0, ams::svc::ThreadLocalRegionSize);
|
|
}
|
|
|
|
/* Set parent, if relevant. */
|
|
if (owner != nullptr) {
|
|
m_parent = owner;
|
|
m_parent->Open();
|
|
}
|
|
|
|
/* Initialize thread context. */
|
|
constexpr bool IsDefault64Bit = sizeof(uintptr_t) == sizeof(u64);
|
|
const bool is_64_bit = m_parent ? m_parent->Is64Bit() : IsDefault64Bit;
|
|
const bool is_user = (type == ThreadType_User);
|
|
const bool is_main = (type == ThreadType_Main);
|
|
m_thread_context.Initialize(reinterpret_cast<uintptr_t>(func), reinterpret_cast<uintptr_t>(this->GetStackTop()), GetInteger(user_stack_top), arg, is_user, is_64_bit, is_main);
|
|
|
|
/* Setup the stack parameters. */
|
|
StackParameters &sp = this->GetStackParameters();
|
|
if (m_parent != nullptr) {
|
|
m_parent->CopySvcPermissionsTo(sp);
|
|
}
|
|
sp.context = std::addressof(m_thread_context);
|
|
sp.cur_thread = this;
|
|
sp.disable_count = 1;
|
|
this->SetInExceptionHandler();
|
|
|
|
/* Set thread ID. */
|
|
m_thread_id = g_thread_id++;
|
|
|
|
/* We initialized! */
|
|
m_initialized = true;
|
|
|
|
/* Register ourselves with our parent process. */
|
|
if (m_parent != nullptr) {
|
|
m_parent->RegisterThread(this);
|
|
if (m_parent->IsSuspended()) {
|
|
this->RequestSuspend(SuspendType_Process);
|
|
}
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result KThread::InitializeThread(KThread *thread, KThreadFunction func, uintptr_t arg, KProcessAddress user_stack_top, s32 prio, s32 core, KProcess *owner, ThreadType type) {
|
|
/* Get stack region for the thread. */
|
|
const auto &stack_region = KMemoryLayout::GetKernelStackRegion();
|
|
MESOSPHERE_ABORT_UNLESS(stack_region.GetEndAddress() != 0);
|
|
|
|
/* Allocate a page to use as the thread. */
|
|
KPageBuffer *page = KPageBuffer::Allocate();
|
|
R_UNLESS(page != nullptr, svc::ResultOutOfResource());
|
|
|
|
/* Map the stack page. */
|
|
KProcessAddress stack_top = Null<KProcessAddress>;
|
|
{
|
|
KProcessAddress stack_bottom = Null<KProcessAddress>;
|
|
auto page_guard = SCOPE_GUARD { KPageBuffer::Free(page); };
|
|
R_TRY(Kernel::GetKernelPageTable().MapPages(std::addressof(stack_bottom), 1, PageSize, page->GetPhysicalAddress(), stack_region.GetAddress(),
|
|
stack_region.GetSize() / PageSize, KMemoryState_Kernel, KMemoryPermission_KernelReadWrite));
|
|
page_guard.Cancel();
|
|
|
|
|
|
/* Calculate top of the stack. */
|
|
stack_top = stack_bottom + PageSize;
|
|
}
|
|
|
|
/* Initialize the thread. */
|
|
auto map_guard = SCOPE_GUARD { CleanupKernelStack(GetInteger(stack_top)); };
|
|
R_TRY(thread->Initialize(func, arg, GetVoidPointer(stack_top), user_stack_top, prio, core, owner, type));
|
|
map_guard.Cancel();
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KThread::PostDestroy(uintptr_t arg) {
|
|
KProcess *owner = reinterpret_cast<KProcess *>(arg & ~1ul);
|
|
const bool resource_limit_release_hint = (arg & 1);
|
|
const s64 hint_value = (resource_limit_release_hint ? 0 : 1);
|
|
if (owner != nullptr) {
|
|
owner->ReleaseResource(ams::svc::LimitableResource_ThreadCountMax, 1, hint_value);
|
|
owner->Close();
|
|
} else {
|
|
Kernel::GetSystemResourceLimit().Release(ams::svc::LimitableResource_ThreadCountMax, 1, hint_value);
|
|
}
|
|
}
|
|
|
|
void KThread::ResumeThreadsSuspendedForInit() {
|
|
KThread::ListAccessor list_accessor;
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
for (auto &thread : list_accessor) {
|
|
static_cast<KThread &>(thread).Resume(SuspendType_Init);
|
|
}
|
|
}
|
|
}
|
|
|
|
void KThread::Finalize() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* If the thread has an owner process, unregister it. */
|
|
if (m_parent != nullptr) {
|
|
m_parent->UnregisterThread(this);
|
|
}
|
|
|
|
/* If the thread has a local region, delete it. */
|
|
if (m_tls_address != Null<KProcessAddress>) {
|
|
MESOSPHERE_R_ABORT_UNLESS(m_parent->DeleteThreadLocalRegion(m_tls_address));
|
|
}
|
|
|
|
/* Release any waiters. */
|
|
{
|
|
MESOSPHERE_ASSERT(m_lock_owner == nullptr);
|
|
KScopedSchedulerLock sl;
|
|
|
|
auto it = m_waiter_list.begin();
|
|
while (it != m_waiter_list.end()) {
|
|
/* Get the thread. */
|
|
KThread * const waiter = std::addressof(*it);
|
|
|
|
/* The thread shouldn't be a kernel waiter. */
|
|
MESOSPHERE_ASSERT(!IsKernelAddressKey(waiter->GetAddressKey()));
|
|
|
|
/* Clear the lock owner. */
|
|
waiter->SetLockOwner(nullptr);
|
|
|
|
/* Erase the waiter from our list. */
|
|
it = m_waiter_list.erase(it);
|
|
|
|
/* Cancel the thread's wait. */
|
|
waiter->CancelWait(svc::ResultInvalidState(), true);
|
|
}
|
|
}
|
|
|
|
/* Finalize the thread context. */
|
|
m_thread_context.Finalize();
|
|
|
|
/* Cleanup the kernel stack. */
|
|
if (m_kernel_stack_top != nullptr) {
|
|
CleanupKernelStack(reinterpret_cast<uintptr_t>(m_kernel_stack_top));
|
|
}
|
|
|
|
/* Perform inherited finalization. */
|
|
KSynchronizationObject::Finalize();
|
|
}
|
|
|
|
bool KThread::IsSignaled() const {
|
|
return m_signaled;
|
|
}
|
|
|
|
void KThread::OnTimer() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* If we're waiting, cancel the wait. */
|
|
if (this->GetState() == ThreadState_Waiting) {
|
|
m_wait_queue->CancelWait(this, svc::ResultTimedOut(), false);
|
|
}
|
|
}
|
|
|
|
void KThread::StartTermination() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Release user exception and unpin, if relevant. */
|
|
if (m_parent != nullptr) {
|
|
m_parent->ReleaseUserException(this);
|
|
if (m_parent->GetPinnedThread(GetCurrentCoreId()) == this) {
|
|
m_parent->UnpinCurrentThread();
|
|
}
|
|
}
|
|
|
|
/* Set state to terminated. */
|
|
this->SetState(KThread::ThreadState_Terminated);
|
|
|
|
/* Clear the thread's status as running in parent. */
|
|
if (m_parent != nullptr) {
|
|
m_parent->ClearRunningThread(this);
|
|
}
|
|
|
|
/* Signal. */
|
|
m_signaled = true;
|
|
KSynchronizationObject::NotifyAvailable();
|
|
|
|
/* Call the on thread termination handler. */
|
|
KThreadContext::OnThreadTerminating(this);
|
|
|
|
/* Clear previous thread in KScheduler. */
|
|
KScheduler::ClearPreviousThread(this);
|
|
|
|
/* Register terminated dpc flag. */
|
|
this->RegisterDpc(DpcFlag_Terminated);
|
|
}
|
|
|
|
void KThread::FinishTermination() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Ensure that the thread is not executing on any core. */
|
|
if (m_parent != nullptr) {
|
|
for (size_t i = 0; i < cpu::NumCores; ++i) {
|
|
KThread *core_thread;
|
|
do {
|
|
core_thread = Kernel::GetScheduler(i).GetSchedulerCurrentThread();
|
|
} while (core_thread == this);
|
|
}
|
|
}
|
|
|
|
/* Close the thread. */
|
|
this->Close();
|
|
}
|
|
|
|
void KThread::DoWorkerTaskImpl() {
|
|
/* Finish the termination that was begun by Exit(). */
|
|
this->FinishTermination();
|
|
}
|
|
|
|
void KThread::Pin() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Set ourselves as pinned. */
|
|
this->GetStackParameters().is_pinned = true;
|
|
|
|
/* Disable core migration. */
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables == 0);
|
|
{
|
|
++m_num_core_migration_disables;
|
|
|
|
/* Save our ideal state to restore when we're unpinned. */
|
|
m_original_physical_ideal_core_id = m_physical_ideal_core_id;
|
|
m_original_physical_affinity_mask = m_physical_affinity_mask;
|
|
|
|
/* Bind ourselves to this core. */
|
|
const s32 active_core = this->GetActiveCore();
|
|
const s32 current_core = GetCurrentCoreId();
|
|
|
|
this->SetActiveCore(current_core);
|
|
m_physical_ideal_core_id = current_core;
|
|
m_physical_affinity_mask.SetAffinityMask(1ul << current_core);
|
|
|
|
if (active_core != current_core || m_physical_affinity_mask.GetAffinityMask() != m_original_physical_affinity_mask.GetAffinityMask()) {
|
|
KScheduler::OnThreadAffinityMaskChanged(this, m_original_physical_affinity_mask, active_core);
|
|
}
|
|
|
|
/* Set base priority-on-unpin. */
|
|
const s32 old_base_priority = m_base_priority;
|
|
m_base_priority_on_unpin = old_base_priority;
|
|
|
|
/* Set base priority to higher than any possible process priority. */
|
|
m_base_priority = std::min<s32>(old_base_priority, __builtin_ctzll(this->GetOwnerProcess()->GetPriorityMask()) - 1);
|
|
RestorePriority(this);
|
|
}
|
|
|
|
/* Disallow performing thread suspension. */
|
|
{
|
|
/* Update our allow flags. */
|
|
m_suspend_allowed_flags &= ~(1 << (util::ToUnderlying(SuspendType_Thread) + util::ToUnderlying(ThreadState_SuspendShift)));
|
|
|
|
/* Update our state. */
|
|
this->UpdateState();
|
|
}
|
|
|
|
/* Update our SVC access permissions. */
|
|
MESOSPHERE_ASSERT(m_parent != nullptr);
|
|
m_parent->CopyPinnedSvcPermissionsTo(this->GetStackParameters());
|
|
}
|
|
|
|
void KThread::Unpin() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Set ourselves as unpinned. */
|
|
this->GetStackParameters().is_pinned = false;
|
|
|
|
/* Enable core migration. */
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables == 1);
|
|
{
|
|
--m_num_core_migration_disables;
|
|
|
|
/* Restore our original state. */
|
|
const KAffinityMask old_mask = m_physical_affinity_mask;
|
|
|
|
m_physical_ideal_core_id = m_original_physical_ideal_core_id;
|
|
m_physical_affinity_mask = m_original_physical_affinity_mask;
|
|
|
|
if (m_physical_affinity_mask.GetAffinityMask() != old_mask.GetAffinityMask()) {
|
|
const s32 active_core = this->GetActiveCore();
|
|
|
|
if (!m_physical_affinity_mask.GetAffinity(active_core)) {
|
|
if (m_physical_ideal_core_id >= 0) {
|
|
this->SetActiveCore(m_physical_ideal_core_id);
|
|
} else {
|
|
this->SetActiveCore(BITSIZEOF(unsigned long long) - 1 - __builtin_clzll(m_physical_affinity_mask.GetAffinityMask()));
|
|
}
|
|
}
|
|
KScheduler::OnThreadAffinityMaskChanged(this, old_mask, active_core);
|
|
}
|
|
|
|
m_base_priority = m_base_priority_on_unpin;
|
|
RestorePriority(this);
|
|
}
|
|
|
|
/* Allow performing thread suspension (if termination hasn't been requested). */
|
|
if (!this->IsTerminationRequested()) {
|
|
/* Update our allow flags. */
|
|
m_suspend_allowed_flags |= (1 << (util::ToUnderlying(SuspendType_Thread) + util::ToUnderlying(ThreadState_SuspendShift)));
|
|
|
|
/* Update our state. */
|
|
this->UpdateState();
|
|
|
|
/* Update our SVC access permissions. */
|
|
MESOSPHERE_ASSERT(m_parent != nullptr);
|
|
m_parent->CopyUnpinnedSvcPermissionsTo(this->GetStackParameters());
|
|
}
|
|
|
|
/* Resume any threads that began waiting on us while we were pinned. */
|
|
for (auto it = m_pinned_waiter_list.begin(); it != m_pinned_waiter_list.end(); it = m_pinned_waiter_list.erase(it)) {
|
|
it->EndWait(ResultSuccess());
|
|
}
|
|
}
|
|
|
|
void KThread::DisableCoreMigration() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(this == GetCurrentThreadPointer());
|
|
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables >= 0);
|
|
if ((m_num_core_migration_disables++) == 0) {
|
|
/* Save our ideal state to restore when we can migrate again. */
|
|
m_original_physical_ideal_core_id = m_physical_ideal_core_id;
|
|
m_original_physical_affinity_mask = m_physical_affinity_mask;
|
|
|
|
/* Bind ourselves to this core. */
|
|
const s32 active_core = this->GetActiveCore();
|
|
m_physical_ideal_core_id = active_core;
|
|
m_physical_affinity_mask.SetAffinityMask(1ul << active_core);
|
|
|
|
if (m_physical_affinity_mask.GetAffinityMask() != m_original_physical_affinity_mask.GetAffinityMask()) {
|
|
KScheduler::OnThreadAffinityMaskChanged(this, m_original_physical_affinity_mask, active_core);
|
|
}
|
|
}
|
|
}
|
|
|
|
void KThread::EnableCoreMigration() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(this == GetCurrentThreadPointer());
|
|
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables > 0);
|
|
if ((--m_num_core_migration_disables) == 0) {
|
|
const KAffinityMask old_mask = m_physical_affinity_mask;
|
|
|
|
/* Restore our ideals. */
|
|
m_physical_ideal_core_id = m_original_physical_ideal_core_id;
|
|
m_physical_affinity_mask = m_original_physical_affinity_mask;
|
|
|
|
if (m_physical_affinity_mask.GetAffinityMask() != old_mask.GetAffinityMask()) {
|
|
const s32 active_core = this->GetActiveCore();
|
|
|
|
if (!m_physical_affinity_mask.GetAffinity(active_core)) {
|
|
if (m_physical_ideal_core_id >= 0) {
|
|
this->SetActiveCore(m_physical_ideal_core_id);
|
|
} else {
|
|
this->SetActiveCore(BITSIZEOF(unsigned long long) - 1 - __builtin_clzll(m_physical_affinity_mask.GetAffinityMask()));
|
|
}
|
|
}
|
|
KScheduler::OnThreadAffinityMaskChanged(this, old_mask, active_core);
|
|
}
|
|
}
|
|
}
|
|
|
|
Result KThread::GetCoreMask(int32_t *out_ideal_core, u64 *out_affinity_mask) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Get the virtual mask. */
|
|
*out_ideal_core = m_virtual_ideal_core_id;
|
|
*out_affinity_mask = m_virtual_affinity_mask;
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result KThread::GetPhysicalCoreMask(int32_t *out_ideal_core, u64 *out_affinity_mask) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables >= 0);
|
|
|
|
/* Select between core mask and original core mask. */
|
|
if (m_num_core_migration_disables == 0) {
|
|
*out_ideal_core = m_physical_ideal_core_id;
|
|
*out_affinity_mask = m_physical_affinity_mask.GetAffinityMask();
|
|
} else {
|
|
*out_ideal_core = m_original_physical_ideal_core_id;
|
|
*out_affinity_mask = m_original_physical_affinity_mask.GetAffinityMask();
|
|
}
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result KThread::SetCoreMask(int32_t core_id, u64 v_affinity_mask) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(m_parent != nullptr);
|
|
MESOSPHERE_ASSERT(v_affinity_mask != 0);
|
|
KScopedLightLock lk(m_activity_pause_lock);
|
|
|
|
/* Set the core mask. */
|
|
u64 p_affinity_mask = 0;
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
MESOSPHERE_ASSERT(m_num_core_migration_disables >= 0);
|
|
|
|
/* If we're updating, set our ideal virtual core. */
|
|
if (core_id != ams::svc::IdealCoreNoUpdate) {
|
|
m_virtual_ideal_core_id = core_id;
|
|
} else {
|
|
/* Preserve our ideal core id. */
|
|
core_id = m_virtual_ideal_core_id;
|
|
R_UNLESS(((1ul << core_id) & v_affinity_mask) != 0, svc::ResultInvalidCombination());
|
|
}
|
|
|
|
/* Set our affinity mask. */
|
|
m_virtual_affinity_mask = v_affinity_mask;
|
|
|
|
/* Translate the virtual core to a physical core. */
|
|
if (core_id >= 0) {
|
|
core_id = cpu::VirtualToPhysicalCoreMap[core_id];
|
|
}
|
|
|
|
/* Translate the virtual affinity mask to a physical one. */
|
|
while (v_affinity_mask != 0) {
|
|
const u64 next = __builtin_ctzll(v_affinity_mask);
|
|
v_affinity_mask &= ~(1ul << next);
|
|
p_affinity_mask |= (1ul << cpu::VirtualToPhysicalCoreMap[next]);
|
|
}
|
|
|
|
/* If we haven't disabled migration, perform an affinity change. */
|
|
if (m_num_core_migration_disables == 0) {
|
|
const KAffinityMask old_mask = m_physical_affinity_mask;
|
|
|
|
/* Set our new ideals. */
|
|
m_physical_ideal_core_id = core_id;
|
|
m_physical_affinity_mask.SetAffinityMask(p_affinity_mask);
|
|
|
|
if (m_physical_affinity_mask.GetAffinityMask() != old_mask.GetAffinityMask()) {
|
|
const s32 active_core = this->GetActiveCore();
|
|
|
|
if (active_core >= 0 && !m_physical_affinity_mask.GetAffinity(active_core)) {
|
|
const s32 new_core = m_physical_ideal_core_id >= 0 ? m_physical_ideal_core_id : BITSIZEOF(unsigned long long) - 1 - __builtin_clzll(m_physical_affinity_mask.GetAffinityMask());
|
|
this->SetActiveCore(new_core);
|
|
}
|
|
KScheduler::OnThreadAffinityMaskChanged(this, old_mask, active_core);
|
|
}
|
|
} else {
|
|
/* Otherwise, we edit the original affinity for restoration later. */
|
|
m_original_physical_ideal_core_id = core_id;
|
|
m_original_physical_affinity_mask.SetAffinityMask(p_affinity_mask);
|
|
}
|
|
}
|
|
|
|
/* Update the pinned waiter list. */
|
|
ThreadQueueImplForKThreadSetProperty wait_queue(std::addressof(m_pinned_waiter_list));
|
|
{
|
|
bool retry_update;
|
|
do {
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Don't do any further management if our termination has been requested. */
|
|
R_SUCCEED_IF(this->IsTerminationRequested());
|
|
|
|
/* By default, we won't need to retry. */
|
|
retry_update = false;
|
|
|
|
/* Check if the thread is currently running. */
|
|
bool thread_is_current = false;
|
|
s32 thread_core;
|
|
for (thread_core = 0; thread_core < static_cast<s32>(cpu::NumCores); ++thread_core) {
|
|
if (Kernel::GetScheduler(thread_core).GetSchedulerCurrentThread() == this) {
|
|
thread_is_current = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If the thread is currently running, check whether it's no longer allowed under the new mask. */
|
|
if (thread_is_current && ((1ul << thread_core) & p_affinity_mask) == 0) {
|
|
/* If the thread is pinned, we want to wait until it's not pinned. */
|
|
if (this->GetStackParameters().is_pinned) {
|
|
/* Verify that the current thread isn't terminating. */
|
|
R_UNLESS(!GetCurrentThread().IsTerminationRequested(), svc::ResultTerminationRequested());
|
|
|
|
/* Wait until the thread isn't pinned any more. */
|
|
m_pinned_waiter_list.push_back(GetCurrentThread());
|
|
GetCurrentThread().BeginWait(std::addressof(wait_queue));
|
|
} else {
|
|
/* If the thread isn't pinned, release the scheduler lock and retry until it's not current. */
|
|
retry_update = true;
|
|
}
|
|
}
|
|
} while (retry_update);
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KThread::SetBasePriority(s32 priority) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(ams::svc::HighestThreadPriority <= priority && priority <= ams::svc::LowestThreadPriority);
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Determine the priority value to use. */
|
|
const s32 target_priority = m_termination_requested.Load() && priority >= TerminatingThreadPriority ? TerminatingThreadPriority : priority;
|
|
|
|
/* Change our base priority. */
|
|
if (this->GetStackParameters().is_pinned) {
|
|
m_base_priority_on_unpin = target_priority;
|
|
} else {
|
|
m_base_priority = target_priority;
|
|
}
|
|
|
|
/* Perform a priority restoration. */
|
|
RestorePriority(this);
|
|
}
|
|
|
|
void KThread::IncreaseBasePriority(s32 priority) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(ams::svc::HighestThreadPriority <= priority && priority <= ams::svc::LowestThreadPriority);
|
|
|
|
/* Set our unpin base priority, if we're pinned. */
|
|
if (this->GetStackParameters().is_pinned && m_base_priority_on_unpin > priority) {
|
|
m_base_priority_on_unpin = priority;
|
|
}
|
|
|
|
/* Set our base priority. */
|
|
if (m_base_priority > priority) {
|
|
m_base_priority = priority;
|
|
|
|
/* Perform a priority restoration. */
|
|
RestorePriority(this);
|
|
}
|
|
}
|
|
|
|
Result KThread::SetPriorityToIdle() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Change both our priorities to the idle thread priority. */
|
|
const s32 old_priority = m_priority;
|
|
m_priority = IdleThreadPriority;
|
|
m_base_priority = IdleThreadPriority;
|
|
KScheduler::OnThreadPriorityChanged(this, old_priority);
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KThread::RequestSuspend(SuspendType type) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedSchedulerLock lk;
|
|
|
|
/* Note the request in our flags. */
|
|
m_suspend_request_flags |= (1u << (util::ToUnderlying(ThreadState_SuspendShift) + util::ToUnderlying(type)));
|
|
|
|
/* Try to perform the suspend. */
|
|
this->TrySuspend();
|
|
}
|
|
|
|
void KThread::Resume(SuspendType type) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Clear the request in our flags. */
|
|
m_suspend_request_flags &= ~(1u << (util::ToUnderlying(ThreadState_SuspendShift) + util::ToUnderlying(type)));
|
|
|
|
/* Update our state. */
|
|
this->UpdateState();
|
|
}
|
|
|
|
void KThread::WaitCancel() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Check if we're waiting and cancellable. */
|
|
if (this->GetState() == ThreadState_Waiting && m_cancellable) {
|
|
m_wait_cancelled = false;
|
|
m_wait_queue->CancelWait(this, svc::ResultCancelled(), true);
|
|
} else {
|
|
/* Otherwise, note that we cancelled a wait. */
|
|
m_wait_cancelled = true;
|
|
}
|
|
}
|
|
|
|
void KThread::TrySuspend() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
MESOSPHERE_ASSERT(this->IsSuspendRequested());
|
|
|
|
/* Ensure that we have no waiters. */
|
|
if (this->GetNumKernelWaiters() > 0) {
|
|
return;
|
|
}
|
|
MESOSPHERE_ABORT_UNLESS(this->GetNumKernelWaiters() == 0);
|
|
|
|
/* Perform the suspend. */
|
|
this->UpdateState();
|
|
}
|
|
|
|
void KThread::UpdateState() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Set our suspend flags in state. */
|
|
const auto old_state = m_thread_state;
|
|
const auto new_state = static_cast<ThreadState>(this->GetSuspendFlags() | (old_state & ThreadState_Mask));
|
|
m_thread_state = new_state;
|
|
|
|
/* Note the state change in scheduler. */
|
|
if (new_state != old_state) {
|
|
KScheduler::OnThreadStateChanged(this, old_state);
|
|
}
|
|
}
|
|
|
|
void KThread::Continue() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Clear our suspend flags in state. */
|
|
const auto old_state = m_thread_state;
|
|
m_thread_state = static_cast<ThreadState>(old_state & ThreadState_Mask);
|
|
|
|
/* Note the state change in scheduler. */
|
|
KScheduler::OnThreadStateChanged(this, old_state);
|
|
}
|
|
|
|
size_t KThread::GetKernelStackUsage() const {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(m_kernel_stack_top != nullptr);
|
|
|
|
#if defined(MESOSPHERE_ENABLE_KERNEL_STACK_USAGE)
|
|
const u8 *stack = static_cast<const u8 *>(m_kernel_stack_top) - PageSize;
|
|
|
|
size_t i;
|
|
for (i = 0; i < PageSize; ++i) {
|
|
if (stack[i] != 0xCC) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return PageSize - i;
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
Result KThread::SetActivity(ams::svc::ThreadActivity activity) {
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(m_activity_pause_lock);
|
|
|
|
/* Set the activity. */
|
|
{
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Verify our state. */
|
|
const auto cur_state = this->GetState();
|
|
R_UNLESS((cur_state == ThreadState_Waiting || cur_state == ThreadState_Runnable), svc::ResultInvalidState());
|
|
|
|
/* Either pause or resume. */
|
|
if (activity == ams::svc::ThreadActivity_Paused) {
|
|
/* Verify that we're not suspended. */
|
|
R_UNLESS(!this->IsSuspendRequested(SuspendType_Thread), svc::ResultInvalidState());
|
|
|
|
/* Suspend. */
|
|
this->RequestSuspend(SuspendType_Thread);
|
|
} else {
|
|
MESOSPHERE_ASSERT(activity == ams::svc::ThreadActivity_Runnable);
|
|
|
|
/* Verify that we're suspended. */
|
|
R_UNLESS(this->IsSuspendRequested(SuspendType_Thread), svc::ResultInvalidState());
|
|
|
|
/* Resume. */
|
|
this->Resume(SuspendType_Thread);
|
|
}
|
|
}
|
|
|
|
/* If the thread is now paused, update the pinned waiter list. */
|
|
if (activity == ams::svc::ThreadActivity_Paused) {
|
|
ThreadQueueImplForKThreadSetProperty wait_queue(std::addressof(m_pinned_waiter_list));
|
|
|
|
bool thread_is_current;
|
|
do {
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Don't do any further management if our termination has been requested. */
|
|
R_SUCCEED_IF(this->IsTerminationRequested());
|
|
|
|
/* By default, treat the thread as not current. */
|
|
thread_is_current = false;
|
|
|
|
/* Check whether the thread is pinned. */
|
|
if (this->GetStackParameters().is_pinned) {
|
|
/* Verify that the current thread isn't terminating. */
|
|
R_UNLESS(!GetCurrentThread().IsTerminationRequested(), svc::ResultTerminationRequested());
|
|
|
|
/* Wait until the thread isn't pinned any more. */
|
|
m_pinned_waiter_list.push_back(GetCurrentThread());
|
|
GetCurrentThread().BeginWait(std::addressof(wait_queue));
|
|
} else {
|
|
/* Check if the thread is currently running. */
|
|
/* If it is, we'll need to retry. */
|
|
for (auto i = 0; i < static_cast<s32>(cpu::NumCores); ++i) {
|
|
if (Kernel::GetScheduler(i).GetSchedulerCurrentThread() == this) {
|
|
thread_is_current = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
} while (thread_is_current);
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
Result KThread::GetThreadContext3(ams::svc::ThreadContext *out) {
|
|
/* Lock ourselves. */
|
|
KScopedLightLock lk(m_activity_pause_lock);
|
|
|
|
/* Get the context. */
|
|
{
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Verify that we're suspended. */
|
|
R_UNLESS(this->IsSuspendRequested(SuspendType_Thread), svc::ResultInvalidState());
|
|
|
|
/* If we're not terminating, get the thread's user context. */
|
|
if (!this->IsTerminationRequested()) {
|
|
GetUserContext(out, this);
|
|
}
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KThread::AddWaiterImpl(KThread *thread) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Find the right spot to insert the waiter. */
|
|
auto it = m_waiter_list.begin();
|
|
while (it != m_waiter_list.end()) {
|
|
if (it->GetPriority() > thread->GetPriority()) {
|
|
break;
|
|
}
|
|
it++;
|
|
}
|
|
|
|
/* Keep track of how many kernel waiters we have. */
|
|
if (IsKernelAddressKey(thread->GetAddressKey())) {
|
|
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters++) >= 0);
|
|
KScheduler::SetSchedulerUpdateNeeded();
|
|
}
|
|
|
|
/* Insert the waiter. */
|
|
m_waiter_list.insert(it, *thread);
|
|
thread->SetLockOwner(this);
|
|
}
|
|
|
|
void KThread::RemoveWaiterImpl(KThread *thread) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
/* Keep track of how many kernel waiters we have. */
|
|
if (IsKernelAddressKey(thread->GetAddressKey())) {
|
|
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0);
|
|
KScheduler::SetSchedulerUpdateNeeded();
|
|
}
|
|
|
|
/* Remove the waiter. */
|
|
m_waiter_list.erase(m_waiter_list.iterator_to(*thread));
|
|
thread->SetLockOwner(nullptr);
|
|
}
|
|
|
|
void KThread::RestorePriority(KThread *thread) {
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
while (true) {
|
|
/* We want to inherit priority where possible. */
|
|
s32 new_priority = thread->GetBasePriority();
|
|
if (thread->HasWaiters()) {
|
|
new_priority = std::min(new_priority, thread->m_waiter_list.front().GetPriority());
|
|
}
|
|
|
|
/* If the priority we would inherit is not different from ours, don't do anything. */
|
|
if (new_priority == thread->GetPriority()) {
|
|
return;
|
|
}
|
|
|
|
/* Ensure we don't violate condition variable red black tree invariants. */
|
|
if (auto *cv_tree = thread->GetConditionVariableTree(); cv_tree != nullptr) {
|
|
BeforeUpdatePriority(cv_tree, thread);
|
|
}
|
|
|
|
/* Change the priority. */
|
|
const s32 old_priority = thread->GetPriority();
|
|
thread->SetPriority(new_priority);
|
|
|
|
/* Restore the condition variable, if relevant. */
|
|
if (auto *cv_tree = thread->GetConditionVariableTree(); cv_tree != nullptr) {
|
|
AfterUpdatePriority(cv_tree, thread);
|
|
}
|
|
|
|
/* Update the scheduler. */
|
|
KScheduler::OnThreadPriorityChanged(thread, old_priority);
|
|
|
|
/* Keep the lock owner up to date. */
|
|
KThread *lock_owner = thread->GetLockOwner();
|
|
if (lock_owner == nullptr) {
|
|
return;
|
|
}
|
|
|
|
/* Update the thread in the lock owner's sorted list, and continue inheriting. */
|
|
lock_owner->RemoveWaiterImpl(thread);
|
|
lock_owner->AddWaiterImpl(thread);
|
|
thread = lock_owner;
|
|
}
|
|
}
|
|
|
|
void KThread::AddWaiter(KThread *thread) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
this->AddWaiterImpl(thread);
|
|
RestorePriority(this);
|
|
}
|
|
|
|
void KThread::RemoveWaiter(KThread *thread) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
this->RemoveWaiterImpl(thread);
|
|
RestorePriority(this);
|
|
}
|
|
|
|
KThread *KThread::RemoveWaiterByKey(s32 *out_num_waiters, KProcessAddress key) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(KScheduler::IsSchedulerLockedByCurrentThread());
|
|
|
|
s32 num_waiters = 0;
|
|
KThread *next_lock_owner = nullptr;
|
|
auto it = m_waiter_list.begin();
|
|
while (it != m_waiter_list.end()) {
|
|
if (it->GetAddressKey() == key) {
|
|
KThread *thread = std::addressof(*it);
|
|
|
|
/* Keep track of how many kernel waiters we have. */
|
|
if (IsKernelAddressKey(thread->GetAddressKey())) {
|
|
MESOSPHERE_ABORT_UNLESS((m_num_kernel_waiters--) > 0);
|
|
KScheduler::SetSchedulerUpdateNeeded();
|
|
}
|
|
it = m_waiter_list.erase(it);
|
|
|
|
/* Update the next lock owner. */
|
|
if (next_lock_owner == nullptr) {
|
|
next_lock_owner = thread;
|
|
next_lock_owner->SetLockOwner(nullptr);
|
|
} else {
|
|
next_lock_owner->AddWaiterImpl(thread);
|
|
}
|
|
num_waiters++;
|
|
} else {
|
|
it++;
|
|
}
|
|
}
|
|
|
|
/* Do priority updates, if we have a next owner. */
|
|
if (next_lock_owner) {
|
|
RestorePriority(this);
|
|
RestorePriority(next_lock_owner);
|
|
}
|
|
|
|
/* Return output. */
|
|
*out_num_waiters = num_waiters;
|
|
return next_lock_owner;
|
|
}
|
|
|
|
Result KThread::Run() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* If the kernel hasn't finished initializing, then we should suspend. */
|
|
if (Kernel::GetState() != Kernel::State::Initialized) {
|
|
this->RequestSuspend(SuspendType_Init);
|
|
}
|
|
while (true) {
|
|
KScopedSchedulerLock lk;
|
|
|
|
/* If either this thread or the current thread are requesting termination, note it. */
|
|
R_UNLESS(!this->IsTerminationRequested(), svc::ResultTerminationRequested());
|
|
R_UNLESS(!GetCurrentThread().IsTerminationRequested(), svc::ResultTerminationRequested());
|
|
|
|
/* Ensure our thread state is correct. */
|
|
R_UNLESS(this->GetState() == ThreadState_Initialized, svc::ResultInvalidState());
|
|
|
|
/* If the current thread has been asked to suspend, suspend it and retry. */
|
|
if (GetCurrentThread().IsSuspended()) {
|
|
GetCurrentThread().UpdateState();
|
|
continue;
|
|
}
|
|
|
|
/* If we're not a kernel thread and we've been asked to suspend, suspend ourselves. */
|
|
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();
|
|
}
|
|
}
|
|
|
|
void KThread::Exit() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
MESOSPHERE_ASSERT(this == GetCurrentThreadPointer());
|
|
|
|
/* Call the debug callback. */
|
|
KDebug::OnExitThread(this);
|
|
|
|
/* 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();
|
|
}
|
|
|
|
/* Destroy any dependent objects. */
|
|
this->DestroyClosedObjects();
|
|
|
|
/* Perform termination. */
|
|
{
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Disallow all suspension. */
|
|
m_suspend_allowed_flags = 0;
|
|
this->UpdateState();
|
|
|
|
/* Start termination. */
|
|
this->StartTermination();
|
|
|
|
/* Register the thread as a work task. */
|
|
KWorkerTaskManager::AddTask(KWorkerTaskManager::WorkerType_Exit, this);
|
|
}
|
|
|
|
MESOSPHERE_PANIC("KThread::Exit() would return");
|
|
}
|
|
|
|
Result KThread::Terminate() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(this != GetCurrentThreadPointer());
|
|
|
|
/* Request the thread terminate. */
|
|
if (const auto new_state = this->RequestTerminate(); new_state != ThreadState_Terminated) {
|
|
/* If the thread isn't terminated, wait for it to terminate. */
|
|
s32 index;
|
|
KSynchronizationObject *objects[] = { this };
|
|
return KSynchronizationObject::Wait(std::addressof(index), objects, 1, ams::svc::WaitInfinite);
|
|
} else {
|
|
return ResultSuccess();
|
|
}
|
|
}
|
|
|
|
KThread::ThreadState KThread::RequestTerminate() {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(this != GetCurrentThreadPointer());
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* Determine if this is the first termination request. */
|
|
const bool first_request = [&]() ALWAYS_INLINE_LAMBDA -> bool {
|
|
/* Perform an atomic compare-and-swap from false to true. */
|
|
bool expected = false;
|
|
return m_termination_requested.CompareExchangeStrong(expected, true);
|
|
}();
|
|
|
|
/* If this is the first request, start termination procedure. */
|
|
if (first_request) {
|
|
/* If the thread is in initialized state, just change state to terminated. */
|
|
if (this->GetState() == ThreadState_Initialized) {
|
|
m_thread_state = ThreadState_Terminated;
|
|
return ThreadState_Terminated;
|
|
}
|
|
|
|
/* Register the terminating dpc. */
|
|
this->RegisterDpc(DpcFlag_Terminating);
|
|
|
|
/* If the thread is pinned, unpin it. */
|
|
if (this->GetStackParameters().is_pinned) {
|
|
this->GetOwnerProcess()->UnpinThread(this);
|
|
}
|
|
|
|
/* If the thread is suspended, continue it. */
|
|
if (this->IsSuspended()) {
|
|
m_suspend_allowed_flags = 0;
|
|
this->UpdateState();
|
|
}
|
|
|
|
/* Change the thread's priority to be higher than any system thread's. */
|
|
if (this->GetBasePriority() >= ams::svc::SystemThreadPriorityHighest) {
|
|
this->SetBasePriority(TerminatingThreadPriority);
|
|
}
|
|
|
|
/* If the thread is runnable, send a termination interrupt to other cores. */
|
|
if (this->GetState() == ThreadState_Runnable) {
|
|
if (const u64 core_mask = m_physical_affinity_mask.GetAffinityMask() & ~(1ul << GetCurrentCoreId()); core_mask != 0) {
|
|
cpu::DataSynchronizationBarrier();
|
|
Kernel::GetInterruptManager().SendInterProcessorInterrupt(KInterruptName_ThreadTerminate, core_mask);
|
|
}
|
|
}
|
|
|
|
/* Wake up the thread. */
|
|
if (this->GetState() == ThreadState_Waiting) {
|
|
m_wait_queue->CancelWait(this, svc::ResultTerminationRequested(), true);
|
|
}
|
|
}
|
|
|
|
return this->GetState();
|
|
}
|
|
|
|
Result KThread::Sleep(s64 timeout) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
MESOSPHERE_ASSERT(!KScheduler::IsSchedulerLockedByCurrentThread());
|
|
MESOSPHERE_ASSERT(this == GetCurrentThreadPointer());
|
|
MESOSPHERE_ASSERT(timeout > 0);
|
|
|
|
ThreadQueueImplForKThreadSleep wait_queue;
|
|
KHardwareTimer *timer;
|
|
{
|
|
/* Setup the scheduling lock and sleep. */
|
|
KScopedSchedulerLockAndSleep slp(std::addressof(timer), this, timeout);
|
|
|
|
/* Check if the thread should terminate. */
|
|
if (this->IsTerminationRequested()) {
|
|
slp.CancelSleep();
|
|
return svc::ResultTerminationRequested();
|
|
}
|
|
|
|
/* Wait for the sleep to end. */
|
|
wait_queue.SetHardwareTimer(timer);
|
|
this->BeginWait(std::addressof(wait_queue));
|
|
}
|
|
|
|
return ResultSuccess();
|
|
}
|
|
|
|
void KThread::BeginWait(KThreadQueue *queue) {
|
|
/* Set our state as waiting. */
|
|
this->SetState(ThreadState_Waiting);
|
|
|
|
/* Set our wait queue. */
|
|
m_wait_queue = queue;
|
|
}
|
|
|
|
void KThread::NotifyAvailable(KSynchronizationObject *signaled_object, Result wait_result) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* If we're waiting, notify our queue that we're available. */
|
|
if (this->GetState() == ThreadState_Waiting) {
|
|
m_wait_queue->NotifyAvailable(this, signaled_object, wait_result);
|
|
}
|
|
}
|
|
|
|
void KThread::EndWait(Result wait_result) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* If we're waiting, notify our queue that we're available. */
|
|
if (this->GetState() == ThreadState_Waiting) {
|
|
m_wait_queue->EndWait(this, wait_result);
|
|
}
|
|
}
|
|
|
|
void KThread::CancelWait(Result wait_result, bool cancel_timer_task) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
/* Lock the scheduler. */
|
|
KScopedSchedulerLock sl;
|
|
|
|
/* If we're waiting, notify our queue that we're available. */
|
|
if (this->GetState() == ThreadState_Waiting) {
|
|
m_wait_queue->CancelWait(this, wait_result, cancel_timer_task);
|
|
}
|
|
}
|
|
|
|
void KThread::SetState(ThreadState state) {
|
|
MESOSPHERE_ASSERT_THIS();
|
|
|
|
KScopedSchedulerLock sl;
|
|
|
|
const ThreadState old_state = m_thread_state;
|
|
m_thread_state = static_cast<ThreadState>((old_state & ~ThreadState_Mask) | (state & ThreadState_Mask));
|
|
if (m_thread_state != old_state) {
|
|
KScheduler::OnThreadStateChanged(this, old_state);
|
|
}
|
|
}
|
|
|
|
KThread *KThread::GetThreadFromId(u64 thread_id) {
|
|
/* Lock the list. */
|
|
KThread::ListAccessor accessor;
|
|
const auto end = accessor.end();
|
|
|
|
/* Find the object with the right id. */
|
|
if (const auto it = accessor.find_key(thread_id); it != end) {
|
|
/* Try to open the thread. */
|
|
if (KThread *thread = static_cast<KThread *>(std::addressof(*it)); AMS_LIKELY(thread->Open())) {
|
|
MESOSPHERE_ASSERT(thread->GetId() == thread_id);
|
|
return thread;
|
|
}
|
|
}
|
|
|
|
/* We failed to find or couldn't open the thread. */
|
|
return nullptr;
|
|
}
|
|
|
|
Result KThread::GetThreadList(s32 *out_num_threads, ams::kern::svc::KUserPointer<u64 *> out_thread_ids, s32 max_out_count) {
|
|
/* Lock the list. */
|
|
KThread::ListAccessor accessor;
|
|
const auto end = accessor.end();
|
|
|
|
/* Iterate over the list. */
|
|
s32 count = 0;
|
|
for (auto it = accessor.begin(); it != end; ++it) {
|
|
/* If we're within array bounds, write the id. */
|
|
if (count < max_out_count) {
|
|
/* Get the thread id. */
|
|
KThread *thread = static_cast<KThread *>(std::addressof(*it));
|
|
const u64 id = thread->GetId();
|
|
|
|
/* Copy the id to userland. */
|
|
R_TRY(out_thread_ids.CopyArrayElementFrom(std::addressof(id), count));
|
|
}
|
|
|
|
/* Increment the count. */
|
|
++count;
|
|
}
|
|
|
|
/* We successfully iterated the list. */
|
|
*out_num_threads = count;
|
|
return ResultSuccess();
|
|
}
|
|
|
|
}
|