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Merge pull request #7712 from bunnei/fix-thread-exit

Accurately implement thread exit
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bunnei 2022-01-17 18:08:24 -08:00 committed by GitHub
commit 101d86897b
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11 changed files with 181 additions and 39 deletions

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@ -124,7 +124,10 @@ void Fiber::YieldTo(std::weak_ptr<Fiber> weak_from, Fiber& to) {
// "from" might no longer be valid if the thread was killed
if (auto from = weak_from.lock()) {
ASSERT(from->impl->previous_fiber != nullptr);
if (from->impl->previous_fiber == nullptr) {
ASSERT_MSG(false, "previous_fiber is nullptr!");
return;
}
from->impl->previous_fiber->impl->context = transfer.fctx;
from->impl->previous_fiber->impl->guard.unlock();
from->impl->previous_fiber.reset();

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@ -247,6 +247,9 @@ add_library(core STATIC
hle/kernel/k_trace.h
hle/kernel/k_transfer_memory.cpp
hle/kernel/k_transfer_memory.h
hle/kernel/k_worker_task.h
hle/kernel/k_worker_task_manager.cpp
hle/kernel/k_worker_task_manager.h
hle/kernel/k_writable_event.cpp
hle/kernel/k_writable_event.h
hle/kernel/kernel.cpp

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@ -149,6 +149,10 @@ ResultCode KProcess::Initialize(KProcess* process, Core::System& system, std::st
return ResultSuccess;
}
void KProcess::DoWorkerTaskImpl() {
UNIMPLEMENTED();
}
KResourceLimit* KProcess::GetResourceLimit() const {
return resource_limit;
}
@ -477,7 +481,7 @@ void KProcess::Finalize() {
}
// Perform inherited finalization.
KAutoObjectWithSlabHeapAndContainer<KProcess, KSynchronizationObject>::Finalize();
KAutoObjectWithSlabHeapAndContainer<KProcess, KWorkerTask>::Finalize();
}
/**

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@ -15,6 +15,7 @@
#include "core/hle/kernel/k_condition_variable.h"
#include "core/hle/kernel/k_handle_table.h"
#include "core/hle/kernel/k_synchronization_object.h"
#include "core/hle/kernel/k_worker_task.h"
#include "core/hle/kernel/process_capability.h"
#include "core/hle/kernel/slab_helpers.h"
#include "core/hle/result.h"
@ -62,8 +63,7 @@ enum class ProcessStatus {
DebugBreak,
};
class KProcess final
: public KAutoObjectWithSlabHeapAndContainer<KProcess, KSynchronizationObject> {
class KProcess final : public KAutoObjectWithSlabHeapAndContainer<KProcess, KWorkerTask> {
KERNEL_AUTOOBJECT_TRAITS(KProcess, KSynchronizationObject);
public:
@ -345,6 +345,8 @@ public:
bool IsSignaled() const override;
void DoWorkerTaskImpl();
void PinCurrentThread(s32 core_id);
void UnpinCurrentThread(s32 core_id);
void UnpinThread(KThread* thread);

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@ -30,6 +30,7 @@
#include "core/hle/kernel/k_system_control.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/k_thread_queue.h"
#include "core/hle/kernel/k_worker_task_manager.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/svc_results.h"
#include "core/hle/kernel/time_manager.h"
@ -332,7 +333,7 @@ void KThread::Finalize() {
}
// Perform inherited finalization.
KAutoObjectWithSlabHeapAndContainer<KThread, KSynchronizationObject>::Finalize();
KSynchronizationObject::Finalize();
}
bool KThread::IsSignaled() const {
@ -376,11 +377,28 @@ void KThread::StartTermination() {
// Register terminated dpc flag.
RegisterDpc(DpcFlag::Terminated);
}
void KThread::FinishTermination() {
// Ensure that the thread is not executing on any core.
if (parent != nullptr) {
for (std::size_t i = 0; i < static_cast<std::size_t>(Core::Hardware::NUM_CPU_CORES); ++i) {
KThread* core_thread{};
do {
core_thread = kernel.Scheduler(i).GetCurrentThread();
} 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(s32 current_core) {
ASSERT(kernel.GlobalSchedulerContext().IsLocked());
@ -417,12 +435,7 @@ void KThread::Pin(s32 current_core) {
static_cast<u32>(ThreadState::SuspendShift)));
// Update our state.
const ThreadState old_state = thread_state;
thread_state = static_cast<ThreadState>(GetSuspendFlags() |
static_cast<u32>(old_state & ThreadState::Mask));
if (thread_state != old_state) {
KScheduler::OnThreadStateChanged(kernel, this, old_state);
}
UpdateState();
}
// TODO(bunnei): Update our SVC access permissions.
@ -463,20 +476,13 @@ void KThread::Unpin() {
}
// Allow performing thread suspension (if termination hasn't been requested).
{
if (!IsTerminationRequested()) {
// Update our allow flags.
if (!IsTerminationRequested()) {
suspend_allowed_flags |= (1 << (static_cast<u32>(SuspendType::Thread) +
static_cast<u32>(ThreadState::SuspendShift)));
}
suspend_allowed_flags |= (1 << (static_cast<u32>(SuspendType::Thread) +
static_cast<u32>(ThreadState::SuspendShift)));
// Update our state.
const ThreadState old_state = thread_state;
thread_state = static_cast<ThreadState>(GetSuspendFlags() |
static_cast<u32>(old_state & ThreadState::Mask));
if (thread_state != old_state) {
KScheduler::OnThreadStateChanged(kernel, this, old_state);
}
UpdateState();
}
// TODO(bunnei): Update our SVC access permissions.
@ -689,12 +695,7 @@ void KThread::Resume(SuspendType type) {
~(1u << (static_cast<u32>(ThreadState::SuspendShift) + static_cast<u32>(type)));
// Update our state.
const ThreadState old_state = thread_state;
thread_state = static_cast<ThreadState>(GetSuspendFlags() |
static_cast<u32>(old_state & ThreadState::Mask));
if (thread_state != old_state) {
KScheduler::OnThreadStateChanged(kernel, this, old_state);
}
this->UpdateState();
}
void KThread::WaitCancel() {
@ -721,19 +722,22 @@ void KThread::TrySuspend() {
ASSERT(GetNumKernelWaiters() == 0);
// Perform the suspend.
Suspend();
this->UpdateState();
}
void KThread::Suspend() {
void KThread::UpdateState() {
ASSERT(kernel.GlobalSchedulerContext().IsLocked());
ASSERT(IsSuspendRequested());
// Set our suspend flags in state.
const auto old_state = thread_state;
thread_state = static_cast<ThreadState>(GetSuspendFlags()) | (old_state & ThreadState::Mask);
const auto new_state =
static_cast<ThreadState>(this->GetSuspendFlags()) | (old_state & ThreadState::Mask);
thread_state = new_state;
// Note the state change in scheduler.
KScheduler::OnThreadStateChanged(kernel, this, old_state);
if (new_state != old_state) {
KScheduler::OnThreadStateChanged(kernel, this, old_state);
}
}
void KThread::Continue() {
@ -998,13 +1002,16 @@ ResultCode KThread::Run() {
// If the current thread has been asked to suspend, suspend it and retry.
if (GetCurrentThread(kernel).IsSuspended()) {
GetCurrentThread(kernel).Suspend();
GetCurrentThread(kernel).UpdateState();
continue;
}
// If we're not a kernel thread and we've been asked to suspend, suspend ourselves.
if (IsUserThread() && IsSuspended()) {
Suspend();
if (KProcess* owner = this->GetOwnerProcess(); owner != nullptr) {
if (IsUserThread() && IsSuspended()) {
this->UpdateState();
}
owner->IncrementThreadCount();
}
// Set our state and finish.
@ -1029,11 +1036,18 @@ void KThread::Exit() {
{
KScopedSchedulerLock sl{kernel};
// Disallow all suspension.
suspend_allowed_flags = 0;
this->UpdateState();
// Disallow all suspension.
suspend_allowed_flags = 0;
// Start termination.
StartTermination();
// Register the thread as a work task.
KWorkerTaskManager::AddTask(kernel, KWorkerTaskManager::WorkerType::Exit, this);
}
}

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@ -19,6 +19,7 @@
#include "core/hle/kernel/k_light_lock.h"
#include "core/hle/kernel/k_spin_lock.h"
#include "core/hle/kernel/k_synchronization_object.h"
#include "core/hle/kernel/k_worker_task.h"
#include "core/hle/kernel/slab_helpers.h"
#include "core/hle/kernel/svc_common.h"
#include "core/hle/kernel/svc_types.h"
@ -100,7 +101,7 @@ enum class ThreadWaitReasonForDebugging : u32 {
[[nodiscard]] KThread& GetCurrentThread(KernelCore& kernel);
[[nodiscard]] s32 GetCurrentCoreId(KernelCore& kernel);
class KThread final : public KAutoObjectWithSlabHeapAndContainer<KThread, KSynchronizationObject>,
class KThread final : public KAutoObjectWithSlabHeapAndContainer<KThread, KWorkerTask>,
public boost::intrusive::list_base_hook<> {
KERNEL_AUTOOBJECT_TRAITS(KThread, KSynchronizationObject);
@ -192,9 +193,9 @@ public:
void TrySuspend();
void Continue();
void UpdateState();
void Suspend();
void Continue();
constexpr void SetSyncedIndex(s32 index) {
synced_index = index;
@ -385,6 +386,8 @@ public:
void OnTimer();
void DoWorkerTaskImpl();
static void PostDestroy(uintptr_t arg);
[[nodiscard]] static ResultCode InitializeDummyThread(KThread* thread);
@ -679,6 +682,8 @@ private:
void StartTermination();
void FinishTermination();
[[nodiscard]] ResultCode Initialize(KThreadFunction func, uintptr_t arg, VAddr user_stack_top,
s32 prio, s32 virt_core, KProcess* owner, ThreadType type);

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@ -0,0 +1,18 @@
// Copyright 2022 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "core/hle/kernel/k_synchronization_object.h"
namespace Kernel {
class KWorkerTask : public KSynchronizationObject {
public:
explicit KWorkerTask(KernelCore& kernel_);
void DoWorkerTask();
};
} // namespace Kernel

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@ -0,0 +1,42 @@
// Copyright 2022 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include "common/assert.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/k_worker_task.h"
#include "core/hle/kernel/k_worker_task_manager.h"
#include "core/hle/kernel/kernel.h"
namespace Kernel {
KWorkerTask::KWorkerTask(KernelCore& kernel_) : KSynchronizationObject{kernel_} {}
void KWorkerTask::DoWorkerTask() {
if (auto* const thread = this->DynamicCast<KThread*>(); thread != nullptr) {
return thread->DoWorkerTaskImpl();
} else {
auto* const process = this->DynamicCast<KProcess*>();
ASSERT(process != nullptr);
return process->DoWorkerTaskImpl();
}
}
KWorkerTaskManager::KWorkerTaskManager() : m_waiting_thread(1, "yuzu:KWorkerTaskManager") {}
void KWorkerTaskManager::AddTask(KernelCore& kernel, WorkerType type, KWorkerTask* task) {
ASSERT(type <= WorkerType::Count);
kernel.WorkerTaskManager().AddTask(kernel, task);
}
void KWorkerTaskManager::AddTask(KernelCore& kernel, KWorkerTask* task) {
KScopedSchedulerLock sl(kernel);
m_waiting_thread.QueueWork([task]() {
// Do the task.
task->DoWorkerTask();
});
}
} // namespace Kernel

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@ -0,0 +1,33 @@
// Copyright 2022 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include "common/common_types.h"
#include "common/thread_worker.h"
namespace Kernel {
class KernelCore;
class KWorkerTask;
class KWorkerTaskManager final {
public:
enum class WorkerType : u32 {
Exit,
Count,
};
KWorkerTaskManager();
static void AddTask(KernelCore& kernel_, WorkerType type, KWorkerTask* task);
private:
void AddTask(KernelCore& kernel, KWorkerTask* task);
private:
Common::ThreadWorker m_waiting_thread;
};
} // namespace Kernel

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@ -37,6 +37,7 @@
#include "core/hle/kernel/k_shared_memory.h"
#include "core/hle/kernel/k_slab_heap.h"
#include "core/hle/kernel/k_thread.h"
#include "core/hle/kernel/k_worker_task_manager.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/physical_core.h"
#include "core/hle/kernel/service_thread.h"
@ -797,6 +798,8 @@ struct KernelCore::Impl {
std::array<u64, Core::Hardware::NUM_CPU_CORES> svc_ticks{};
KWorkerTaskManager worker_task_manager;
// System context
Core::System& system;
};
@ -1137,6 +1140,14 @@ const Init::KSlabResourceCounts& KernelCore::SlabResourceCounts() const {
return impl->slab_resource_counts;
}
KWorkerTaskManager& KernelCore::WorkerTaskManager() {
return impl->worker_task_manager;
}
const KWorkerTaskManager& KernelCore::WorkerTaskManager() const {
return impl->worker_task_manager;
}
bool KernelCore::IsPhantomModeForSingleCore() const {
return impl->IsPhantomModeForSingleCore();
}

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@ -52,6 +52,7 @@ class KSharedMemory;
class KSharedMemoryInfo;
class KThread;
class KTransferMemory;
class KWorkerTaskManager;
class KWritableEvent;
class KCodeMemory;
class PhysicalCore;
@ -343,6 +344,12 @@ public:
/// Gets the current slab resource counts.
const Init::KSlabResourceCounts& SlabResourceCounts() const;
/// Gets the current worker task manager, used for dispatching KThread/KProcess tasks.
KWorkerTaskManager& WorkerTaskManager();
/// Gets the current worker task manager, used for dispatching KThread/KProcess tasks.
const KWorkerTaskManager& WorkerTaskManager() const;
private:
friend class KProcess;
friend class KThread;