mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 07:08:59 +00:00
395 lines
18 KiB
C++
395 lines
18 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <mesosphere/kern_slab_helpers.hpp>
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#include <mesosphere/kern_k_synchronization_object.hpp>
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#include <mesosphere/kern_k_affinity_mask.hpp>
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#include <mesosphere/kern_k_thread_context.hpp>
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#include <mesosphere/kern_k_current_context.hpp>
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#include <mesosphere/kern_k_timer_task.hpp>
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#include <mesosphere/kern_k_worker_task.hpp>
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namespace ams::kern {
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class KThreadQueue;
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class KProcess;
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class KConditionVariable;
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class KAddressArbiter;
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using KThreadFunction = void (*)(uintptr_t);
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class KThread final : public KAutoObjectWithSlabHeapAndContainer<KThread, KSynchronizationObject>, public KTimerTask, public KWorkerTask {
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MESOSPHERE_AUTOOBJECT_TRAITS(KThread, KSynchronizationObject);
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private:
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friend class KProcess;
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friend class KConditionVariable;
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friend class KAddressArbiter;
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public:
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static constexpr s32 MainThreadPriority = 1;
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static constexpr s32 IdleThreadPriority = 64;
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enum ThreadType : u32 {
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ThreadType_Main = 0,
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ThreadType_Kernel = 1,
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ThreadType_HighPriority = 2,
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ThreadType_User = 3,
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};
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enum SuspendType : u32 {
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SuspendType_Process = 0,
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SuspendType_Thread = 1,
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SuspendType_Debug = 2,
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SuspendType_Unk3 = 3,
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SuspendType_Init = 4,
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SuspendType_Count,
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};
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enum ThreadState : u16 {
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ThreadState_Initialized = 0,
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ThreadState_Waiting = 1,
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ThreadState_Runnable = 2,
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ThreadState_Terminated = 3,
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ThreadState_SuspendShift = 4,
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ThreadState_Mask = (1 << ThreadState_SuspendShift) - 1,
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ThreadState_ProcessSuspended = (1 << (SuspendType_Process + ThreadState_SuspendShift)),
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ThreadState_ThreadSuspended = (1 << (SuspendType_Thread + ThreadState_SuspendShift)),
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ThreadState_DebugSuspended = (1 << (SuspendType_Debug + ThreadState_SuspendShift)),
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ThreadState_Unk3Suspended = (1 << (SuspendType_Unk3 + ThreadState_SuspendShift)),
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ThreadState_InitSuspended = (1 << (SuspendType_Init + ThreadState_SuspendShift)),
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ThreadState_SuspendFlagMask = ((1 << SuspendType_Count) - 1) << ThreadState_SuspendShift,
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};
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enum DpcFlag : u32 {
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DpcFlag_Terminating = (1 << 0),
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DpcFlag_Terminated = (1 << 1),
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};
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struct StackParameters {
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alignas(0x10) u8 svc_permission[0x10];
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std::atomic<u8> dpc_flags;
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u8 current_svc_id;
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bool is_calling_svc;
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bool is_in_exception_handler;
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bool has_exception_svc_perms;
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s32 disable_count;
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KThreadContext *context;
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};
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static_assert(alignof(StackParameters) == 0x10);
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struct QueueEntry {
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private:
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KThread *prev;
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KThread *next;
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public:
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constexpr QueueEntry() : prev(nullptr), next(nullptr) { /* ... */ }
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constexpr void Initialize() {
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this->prev = nullptr;
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this->next = nullptr;
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}
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constexpr KThread *GetPrev() const { return this->prev; }
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constexpr KThread *GetNext() const { return this->next; }
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constexpr void SetPrev(KThread *t) { this->prev = t; }
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constexpr void SetNext(KThread *t) { this->next = t; }
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};
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private:
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static constexpr size_t PriorityInheritanceCountMax = 10;
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union SyncObjectBuffer {
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KSynchronizationObject *sync_objects[ams::svc::MaxWaitSynchronizationHandleCount];
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ams::svc::Handle handles[ams::svc::MaxWaitSynchronizationHandleCount * (sizeof(KSynchronizationObject *) / sizeof(ams::svc::Handle))];
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constexpr SyncObjectBuffer() : sync_objects() { /* ... */ }
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};
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static_assert(sizeof(SyncObjectBuffer::sync_objects) == sizeof(SyncObjectBuffer::handles));
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private:
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static inline std::atomic<u64> s_next_thread_id = 0;
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private:
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alignas(16) KThreadContext thread_context{};
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KAffinityMask affinity_mask{};
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u64 thread_id{};
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std::atomic<s64> cpu_time{};
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KSynchronizationObject *synced_object{};
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KLightLock *waiting_lock{};
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uintptr_t condvar_key{};
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uintptr_t entrypoint{};
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KProcessAddress arbiter_key{};
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KProcess *parent{};
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void *kernel_stack_top{};
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u32 *light_ipc_data{};
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KProcessAddress tls_address{};
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void *tls_heap_address{};
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KLightLock activity_pause_lock{};
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SyncObjectBuffer sync_object_buffer{};
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s64 schedule_count{};
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s64 last_scheduled_tick{};
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QueueEntry per_core_priority_queue_entry[cpu::NumCores]{};
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QueueEntry sleeping_queue_entry{};
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KThreadQueue *sleeping_queue{};
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util::IntrusiveListNode waiter_list_node{};
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util::IntrusiveRedBlackTreeNode condvar_arbiter_tree_node{};
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util::IntrusiveListNode process_list_node{};
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using WaiterListTraits = util::IntrusiveListMemberTraitsDeferredAssert<&KThread::waiter_list_node>;
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using WaiterList = WaiterListTraits::ListType;
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WaiterList waiter_list{};
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WaiterList paused_waiter_list{};
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KThread *lock_owner{};
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KConditionVariable *cond_var{};
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uintptr_t debug_params[3]{};
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u32 arbiter_value{};
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u32 suspend_request_flags{};
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u32 suspend_allowed_flags{};
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Result wait_result;
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Result debug_exception_result;
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s32 priority{};
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s32 core_id{};
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s32 base_priority{};
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s32 ideal_core_id{};
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s32 num_kernel_waiters{};
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KAffinityMask original_affinity_mask{};
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s32 original_ideal_core_id{};
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s32 num_core_migration_disables{};
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ThreadState thread_state{};
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std::atomic<bool> termination_requested{};
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bool ipc_cancelled{};
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bool wait_cancelled{};
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bool cancellable{};
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bool registered{};
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bool signaled{};
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bool initialized{};
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bool debug_attached{};
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s8 priority_inheritance_count{};
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bool resource_limit_release_hint{};
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public:
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constexpr KThread() : wait_result(svc::ResultNoSynchronizationObject()), debug_exception_result(ResultSuccess()) { /* ... */ }
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virtual ~KThread() { /* ... */ }
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/* TODO: Is a constexpr KThread() possible? */
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Result Initialize(KThreadFunction func, uintptr_t arg, void *kern_stack_top, KProcessAddress user_stack_top, s32 prio, s32 core, KProcess *owner, ThreadType type);
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private:
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static Result InitializeThread(KThread *thread, KThreadFunction func, uintptr_t arg, KProcessAddress user_stack_top, s32 prio, s32 core, KProcess *owner, ThreadType type);
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public:
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static Result InitializeKernelThread(KThread *thread, KThreadFunction func, uintptr_t arg, s32 prio, s32 core) {
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return InitializeThread(thread, func, arg, Null<KProcessAddress>, prio, core, nullptr, ThreadType_Kernel);
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}
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static Result InitializeHighPriorityThread(KThread *thread, KThreadFunction func, uintptr_t arg) {
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return InitializeThread(thread, func, arg, Null<KProcessAddress>, 0, GetCurrentCoreId(), nullptr, ThreadType_HighPriority);
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}
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/* TODO: static Result InitializeUserThread */
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private:
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StackParameters &GetStackParameters() {
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return *(reinterpret_cast<StackParameters *>(this->kernel_stack_top) - 1);
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}
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const StackParameters &GetStackParameters() const {
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return *(reinterpret_cast<const StackParameters *>(this->kernel_stack_top) - 1);
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}
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public:
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ALWAYS_INLINE s32 GetDisableDispatchCount() const {
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MESOSPHERE_ASSERT_THIS();
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return this->GetStackParameters().disable_count;
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}
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ALWAYS_INLINE void DisableDispatch() {
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MESOSPHERE_ASSERT_THIS();
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MESOSPHERE_ASSERT(GetCurrentThread().GetDisableDispatchCount() >= 0);
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this->GetStackParameters().disable_count++;
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}
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ALWAYS_INLINE void EnableDispatch() {
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MESOSPHERE_ASSERT_THIS();
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MESOSPHERE_ASSERT(GetCurrentThread().GetDisableDispatchCount() > 0);
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this->GetStackParameters().disable_count--;
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}
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NOINLINE void DisableCoreMigration();
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NOINLINE void EnableCoreMigration();
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ALWAYS_INLINE void SetInExceptionHandler() {
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MESOSPHERE_ASSERT_THIS();
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this->GetStackParameters().is_in_exception_handler = true;
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}
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ALWAYS_INLINE void ClearInExceptionHandler() {
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MESOSPHERE_ASSERT_THIS();
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this->GetStackParameters().is_in_exception_handler = false;
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}
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ALWAYS_INLINE bool IsInExceptionHandler() const {
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MESOSPHERE_ASSERT_THIS();
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return this->GetStackParameters().is_in_exception_handler;
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}
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ALWAYS_INLINE void RegisterDpc(DpcFlag flag) {
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this->GetStackParameters().dpc_flags |= flag;
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}
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ALWAYS_INLINE void ClearDpc(DpcFlag flag) {
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this->GetStackParameters().dpc_flags &= ~flag;
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}
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ALWAYS_INLINE u8 GetDpc() const {
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return this->GetStackParameters().dpc_flags;
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}
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ALWAYS_INLINE bool HasDpc() const {
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MESOSPHERE_ASSERT_THIS();
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return this->GetDpc() != 0;;
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}
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private:
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void Suspend();
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ALWAYS_INLINE void AddWaiterImpl(KThread *thread);
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ALWAYS_INLINE void RemoveWaiterImpl(KThread *thread);
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ALWAYS_INLINE static void RestorePriority(KThread *thread);
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public:
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constexpr u64 GetThreadId() const { return this->thread_id; }
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constexpr KThreadContext *GetContext() { return std::addressof(this->thread_context); }
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constexpr const KThreadContext *GetContext() const { return std::addressof(this->thread_context); }
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constexpr const KAffinityMask &GetAffinityMask() const { return this->affinity_mask; }
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constexpr ThreadState GetState() const { return static_cast<ThreadState>(this->thread_state & ThreadState_Mask); }
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constexpr ThreadState GetRawState() const { return this->thread_state; }
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NOINLINE void SetState(ThreadState state);
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NOINLINE KThreadContext *GetContextForSchedulerLoop();
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constexpr uintptr_t GetConditionVariableKey() const { return this->condvar_key; }
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constexpr s32 GetActiveCore() const { return this->core_id; }
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constexpr void SetActiveCore(s32 core) { this->core_id = core; }
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constexpr s32 GetPriority() const { return this->priority; }
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constexpr void SetPriority(s32 prio) { this->priority = prio; }
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constexpr s32 GetBasePriority() const { return this->base_priority; }
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constexpr QueueEntry &GetPriorityQueueEntry(s32 core) { return this->per_core_priority_queue_entry[core]; }
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constexpr const QueueEntry &GetPriorityQueueEntry(s32 core) const { return this->per_core_priority_queue_entry[core]; }
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constexpr QueueEntry &GetSleepingQueueEntry() { return this->sleeping_queue_entry; }
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constexpr const QueueEntry &GetSleepingQueueEntry() const { return this->sleeping_queue_entry; }
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constexpr void SetSleepingQueue(KThreadQueue *q) { this->sleeping_queue = q; }
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constexpr KConditionVariable *GetConditionVariable() const { return this->cond_var; }
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constexpr s32 GetNumKernelWaiters() const { return this->num_kernel_waiters; }
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void AddWaiter(KThread *thread);
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void RemoveWaiter(KThread *thread);
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KThread *RemoveWaiterByKey(s32 *out_num_waiters, KProcessAddress key);
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constexpr KProcessAddress GetAddressKey() const { return this->arbiter_key; }
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constexpr void SetAddressKey(KProcessAddress key) { this->arbiter_key = key; }
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constexpr void SetLockOwner(KThread *owner) { this->lock_owner = owner; }
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constexpr KThread *GetLockOwner() const { return this->lock_owner; }
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bool HasWaiters() const { return !this->waiter_list.empty(); }
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constexpr s64 GetLastScheduledTick() const { return this->last_scheduled_tick; }
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constexpr void SetLastScheduledTick(s64 tick) { this->last_scheduled_tick = tick; }
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constexpr KProcess *GetOwnerProcess() const { return this->parent; }
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constexpr bool IsUserThread() const { return this->parent != nullptr; }
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constexpr KProcessAddress GetThreadLocalRegionAddress() const { return this->tls_address; }
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constexpr void *GetThreadLocalRegionHeapAddress() const { return this->tls_heap_address; }
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constexpr u16 GetUserPreemptionState() const { return *GetPointer<u16>(this->tls_address + 0x100); }
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constexpr void SetKernelPreemptionState(u16 state) const { *GetPointer<u16>(this->tls_address + 0x100 + sizeof(u16)) = state; }
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void AddCpuTime(s64 amount) {
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this->cpu_time += amount;
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}
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constexpr u32 GetSuspendFlags() const { return this->suspend_allowed_flags & this->suspend_request_flags; }
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constexpr bool IsSuspended() const { return this->GetSuspendFlags() != 0; }
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void RequestSuspend(SuspendType type);
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void TrySuspend();
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void Continue();
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void ContinueIfHasKernelWaiters() {
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if (this->GetNumKernelWaiters() > 0) {
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this->Continue();
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}
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}
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Result SetPriorityToIdle();
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Result Run();
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void Exit();
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ALWAYS_INLINE void *GetStackTop() const { return reinterpret_cast<StackParameters *>(this->kernel_stack_top) - 1; }
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ALWAYS_INLINE void *GetKernelStackTop() const { return this->kernel_stack_top; }
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/* TODO: This is kind of a placeholder definition. */
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ALWAYS_INLINE bool IsTerminationRequested() const {
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return this->termination_requested || this->GetRawState() == ThreadState_Terminated;
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}
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public:
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/* Overridden parent functions. */
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virtual u64 GetId() const override { return this->GetThreadId(); }
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virtual bool IsInitialized() const override { return this->initialized; }
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virtual uintptr_t GetPostDestroyArgument() const override { return reinterpret_cast<uintptr_t>(this->parent) | (this->resource_limit_release_hint ? 1 : 0); }
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static void PostDestroy(uintptr_t arg);
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virtual void Finalize() override;
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virtual bool IsSignaled() const override;
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virtual void OnTimer() override;
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virtual void DoWorkerTask() override;
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public:
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static constexpr bool IsWaiterListValid() {
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return WaiterListTraits::IsValid();
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}
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};
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static_assert(alignof(KThread) == 0x10);
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static_assert(KThread::IsWaiterListValid());
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class KScopedDisableDispatch {
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public:
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explicit ALWAYS_INLINE KScopedDisableDispatch() {
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GetCurrentThread().DisableDispatch();
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}
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ALWAYS_INLINE ~KScopedDisableDispatch() {
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GetCurrentThread().EnableDispatch();
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}
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};
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class KScopedEnableDispatch {
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public:
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explicit ALWAYS_INLINE KScopedEnableDispatch() {
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GetCurrentThread().EnableDispatch();
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}
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ALWAYS_INLINE ~KScopedEnableDispatch() {
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GetCurrentThread().DisableDispatch();
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}
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};
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}
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