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hle: kernel: KThread: Rework dummy threads & fix memory leak.

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- Dummy threads are created on thread local storage for all host threads.
- Fixes a leak by removing creation of fibers, which are not applicable here.
This commit is contained in:
bunnei
2021-03-05 00:13:29 -08:00
parent 7b29a8ce4e
commit 47af34003b
6 changed files with 65 additions and 36 deletions
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6
src/core/hle/kernel/k_scheduler.cpp
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@@ -800,9 +800,9 @@ void KScheduler::Initialize() {
std::string name = "Idle Thread Id:" + std::to_string(core_id);
std::function<void(void*)> init_func = Core::CpuManager::GetIdleThreadStartFunc();
void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
auto thread_res = KThread::Create(system, ThreadType::Main, name, 0,
KThread::IdleThreadPriority, 0, static_cast<u32>(core_id), 0,
nullptr, std::move(init_func), init_func_parameter);
auto thread_res = KThread::CreateThread(
system, ThreadType::Main, name, 0, KThread::IdleThreadPriority, 0,
static_cast<u32>(core_id), 0, nullptr, std::move(init_func), init_func_parameter);
idle_thread = thread_res.Unwrap().get();
}

50
src/core/hle/kernel/k_thread.cpp
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@@ -995,22 +995,11 @@ std::shared_ptr<Common::Fiber>& KThread::GetHostContext() {
return host_context;
}
ResultVal<std::shared_ptr<KThread>> KThread::Create(Core::System& system, ThreadType type_flags,
std::string name, VAddr entry_point,
u32 priority, u64 arg, s32 processor_id,
VAddr stack_top, Process* owner_process) {
std::function<void(void*)> init_func = Core::CpuManager::GetGuestThreadStartFunc();
void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
return Create(system, type_flags, name, entry_point, priority, arg, processor_id, stack_top,
owner_process, std::move(init_func), init_func_parameter);
}
ResultVal<std::shared_ptr<KThread>> KThread::Create(Core::System& system, ThreadType type_flags,
std::string name, VAddr entry_point,
u32 priority, u64 arg, s32 processor_id,
VAddr stack_top, Process* owner_process,
std::function<void(void*)>&& thread_start_func,
void* thread_start_parameter) {
ResultVal<std::shared_ptr<KThread>> KThread::CreateThread(Core::System& system,
ThreadType type_flags, std::string name,
VAddr entry_point, u32 priority, u64 arg,
s32 processor_id, VAddr stack_top,
Process* owner_process) {
auto& kernel = system.Kernel();
std::shared_ptr<KThread> thread = std::make_shared<KThread>(kernel);
@@ -1027,12 +1016,35 @@ ResultVal<std::shared_ptr<KThread>> KThread::Create(Core::System& system, Thread
auto& scheduler = kernel.GlobalSchedulerContext();
scheduler.AddThread(thread);
thread->host_context =
std::make_shared<Common::Fiber>(std::move(thread_start_func), thread_start_parameter);
return MakeResult<std::shared_ptr<KThread>>(std::move(thread));
}
ResultVal<std::shared_ptr<KThread>> KThread::CreateThread(
Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point, u32 priority,
u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process,
std::function<void(void*)>&& thread_start_func, void* thread_start_parameter) {
auto thread_result = CreateThread(system, type_flags, name, entry_point, priority, arg,
processor_id, stack_top, owner_process);
if (thread_result.Succeeded()) {
(*thread_result)->host_context =
std::make_shared<Common::Fiber>(std::move(thread_start_func), thread_start_parameter);
}
return thread_result;
}
ResultVal<std::shared_ptr<KThread>> KThread::CreateUserThread(
Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point, u32 priority,
u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process) {
std::function<void(void*)> init_func = Core::CpuManager::GetGuestThreadStartFunc();
void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
return CreateThread(system, type_flags, name, entry_point, priority, arg, processor_id,
stack_top, owner_process, std::move(init_func), init_func_parameter);
}
KThread* GetCurrentThreadPointer(KernelCore& kernel) {
return kernel.GetCurrentEmuThread();
}

24
src/core/hle/kernel/k_thread.h
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@@ -116,7 +116,7 @@ public:
using WaiterList = boost::intrusive::list<KThread>;
/**
* Creates and returns a new thread. The new thread is immediately scheduled
* Creates and returns a new thread.
* @param system The instance of the whole system
* @param name The friendly name desired for the thread
* @param entry_point The address at which the thread should start execution
@@ -127,12 +127,12 @@ public:
* @param owner_process The parent process for the thread, if null, it's a kernel thread
* @return A shared pointer to the newly created thread
*/
[[nodiscard]] static ResultVal<std::shared_ptr<KThread>> Create(
[[nodiscard]] static ResultVal<std::shared_ptr<KThread>> CreateThread(
Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point,
u32 priority, u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process);
/**
* Creates and returns a new thread. The new thread is immediately scheduled
* Creates and returns a new thread, with a specified entry point.
* @param system The instance of the whole system
* @param name The friendly name desired for the thread
* @param entry_point The address at which the thread should start execution
@@ -145,11 +145,27 @@ public:
* @param thread_start_parameter The parameter which will passed to host context on init
* @return A shared pointer to the newly created thread
*/
[[nodiscard]] static ResultVal<std::shared_ptr<KThread>> Create(
[[nodiscard]] static ResultVal<std::shared_ptr<KThread>> CreateThread(
Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point,
u32 priority, u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process,
std::function<void(void*)>&& thread_start_func, void* thread_start_parameter);
/**
* Creates and returns a new thread for the emulated "user" process.
* @param system The instance of the whole system
* @param name The friendly name desired for the thread
* @param entry_point The address at which the thread should start execution
* @param priority The thread's priority
* @param arg User data to pass to the thread
* @param processor_id The ID(s) of the processors on which the thread is desired to be run
* @param stack_top The address of the thread's stack top
* @param owner_process The parent process for the thread, if null, it's a kernel thread
* @return A shared pointer to the newly created thread
*/
[[nodiscard]] static ResultVal<std::shared_ptr<KThread>> CreateUserThread(
Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point,
u32 priority, u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process);
[[nodiscard]] std::string GetName() const override {
return name;
}

11
src/core/hle/kernel/kernel.cpp
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@@ -181,9 +181,9 @@ struct KernelCore::Impl {
std::string name = "Suspend Thread Id:" + std::to_string(i);
std::function<void(void*)> init_func = Core::CpuManager::GetSuspendThreadStartFunc();
void* init_func_parameter = system.GetCpuManager().GetStartFuncParamater();
auto thread_res = KThread::Create(system, ThreadType::HighPriority, std::move(name), 0,
0, 0, static_cast<u32>(i), 0, nullptr,
std::move(init_func), init_func_parameter);
auto thread_res = KThread::CreateThread(
system, ThreadType::HighPriority, std::move(name), 0, 0, 0, static_cast<u32>(i), 0,
nullptr, std::move(init_func), init_func_parameter);
suspend_threads[i] = std::move(thread_res).Unwrap();
}
@@ -221,10 +221,9 @@ struct KernelCore::Impl {
// Gets the dummy KThread for the caller, allocating a new one if this is the first time
KThread* GetHostDummyThread() {
const thread_local auto thread =
KThread::Create(
KThread::CreateThread(
system, ThreadType::Main, fmt::format("DummyThread:{}", GetHostThreadId()), 0,
KThread::DefaultThreadPriority, 0, static_cast<u32>(3), 0, nullptr,
[]([[maybe_unused]] void* arg) { UNREACHABLE(); }, nullptr)
KThread::DefaultThreadPriority, 0, static_cast<u32>(3), 0, nullptr)
.Unwrap();
return thread.get();
}

5
src/core/hle/kernel/process.cpp
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@@ -40,8 +40,9 @@ namespace {
void SetupMainThread(Core::System& system, Process& owner_process, u32 priority, VAddr stack_top) {
const VAddr entry_point = owner_process.PageTable().GetCodeRegionStart();
ASSERT(owner_process.GetResourceLimit()->Reserve(LimitableResource::Threads, 1));
auto thread_res = KThread::Create(system, ThreadType::User, "main", entry_point, priority, 0,
owner_process.GetIdealCoreId(), stack_top, &owner_process);
auto thread_res =
KThread::CreateUserThread(system, ThreadType::User, "main", entry_point, priority, 0,
owner_process.GetIdealCoreId(), stack_top, &owner_process);
std::shared_ptr<KThread> thread = std::move(thread_res).Unwrap();

5
src/core/hle/kernel/svc.cpp
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@@ -1532,8 +1532,9 @@ static ResultCode CreateThread(Core::System& system, Handle* out_handle, VAddr e
std::shared_ptr<KThread> thread;
{
KScopedLightLock lk{process.GetStateLock()};
CASCADE_RESULT(thread, KThread::Create(system, ThreadType::User, "", entry_point, priority,
arg, core_id, stack_bottom, &process));
CASCADE_RESULT(thread,
KThread::CreateUserThread(system, ThreadType::User, "", entry_point,
priority, arg, core_id, stack_bottom, &process));
}
const auto new_thread_handle = process.GetHandleTable().Create(thread);