forked from suyu/suyu
764 lines
22 KiB
C++
764 lines
22 KiB
C++
// Copyright 2014 Citra Emulator Project / PPSSPP Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <array>
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#include <functional>
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#include <span>
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#include <string>
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#include <utility>
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#include <vector>
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#include <boost/intrusive/list.hpp>
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#include "common/common_types.h"
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#include "common/intrusive_red_black_tree.h"
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#include "common/spin_lock.h"
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#include "core/arm/arm_interface.h"
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#include "core/hle/kernel/k_affinity_mask.h"
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#include "core/hle/kernel/k_synchronization_object.h"
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#include "core/hle/kernel/object.h"
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#include "core/hle/kernel/svc_common.h"
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#include "core/hle/result.h"
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namespace Common {
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class Fiber;
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}
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namespace Core {
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class ARM_Interface;
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class System;
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} // namespace Core
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namespace Kernel {
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class GlobalSchedulerContext;
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class KernelCore;
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class Process;
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class KScheduler;
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enum ThreadPriority : u32 {
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THREADPRIO_HIGHEST = 0, ///< Highest thread priority
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THREADPRIO_MAX_CORE_MIGRATION = 2, ///< Highest priority for a core migration
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THREADPRIO_USERLAND_MAX = 24, ///< Highest thread priority for userland apps
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THREADPRIO_DEFAULT = 44, ///< Default thread priority for userland apps
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THREADPRIO_LOWEST = 63, ///< Lowest thread priority
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THREADPRIO_COUNT = 64, ///< Total number of possible thread priorities.
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};
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enum class ThreadType : u32 {
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Main = 0,
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Kernel = 1,
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HighPriority = 2,
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User = 3,
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};
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DECLARE_ENUM_FLAG_OPERATORS(ThreadType);
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enum ThreadProcessorId : s32 {
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/// Indicates that no particular processor core is preferred.
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THREADPROCESSORID_DONT_CARE = -1,
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/// Run thread on the ideal core specified by the process.
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THREADPROCESSORID_IDEAL = -2,
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/// Indicates that the preferred processor ID shouldn't be updated in
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/// a core mask setting operation.
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THREADPROCESSORID_DONT_UPDATE = -3,
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THREADPROCESSORID_0 = 0, ///< Run thread on core 0
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THREADPROCESSORID_1 = 1, ///< Run thread on core 1
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THREADPROCESSORID_2 = 2, ///< Run thread on core 2
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THREADPROCESSORID_3 = 3, ///< Run thread on core 3
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THREADPROCESSORID_MAX = 4, ///< Processor ID must be less than this
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/// Allowed CPU mask
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THREADPROCESSORID_DEFAULT_MASK = (1 << THREADPROCESSORID_0) | (1 << THREADPROCESSORID_1) |
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(1 << THREADPROCESSORID_2) | (1 << THREADPROCESSORID_3)
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};
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enum class ThreadState : u16 {
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Initialized = 0,
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Waiting = 1,
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Runnable = 2,
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Terminated = 3,
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SuspendShift = 4,
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Mask = (1 << SuspendShift) - 1,
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ProcessSuspended = (1 << (0 + SuspendShift)),
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ThreadSuspended = (1 << (1 + SuspendShift)),
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DebugSuspended = (1 << (2 + SuspendShift)),
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BacktraceSuspended = (1 << (3 + SuspendShift)),
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InitSuspended = (1 << (4 + SuspendShift)),
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SuspendFlagMask = ((1 << 5) - 1) << SuspendShift,
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};
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DECLARE_ENUM_FLAG_OPERATORS(ThreadState);
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enum class ThreadWakeupReason {
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Signal, // The thread was woken up by WakeupAllWaitingThreads due to an object signal.
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Timeout // The thread was woken up due to a wait timeout.
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};
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enum class ThreadActivity : u32 {
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Normal = 0,
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Paused = 1,
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};
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enum class ThreadSchedFlags : u32 {
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ProcessPauseFlag = 1 << 4,
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ThreadPauseFlag = 1 << 5,
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ProcessDebugPauseFlag = 1 << 6,
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KernelInitPauseFlag = 1 << 8,
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};
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enum class ThreadWaitReasonForDebugging : u32 {
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None, ///< Thread is not waiting
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Sleep, ///< Thread is waiting due to a SleepThread SVC
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IPC, ///< Thread is waiting for the reply from an IPC request
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Synchronization, ///< Thread is waiting due to a WaitSynchronization SVC
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ConditionVar, ///< Thread is waiting due to a WaitProcessWideKey SVC
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Arbitration, ///< Thread is waiting due to a SignalToAddress/WaitForAddress SVC
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Suspended, ///< Thread is waiting due to process suspension
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};
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class KThread final : public KSynchronizationObject, public boost::intrusive::list_base_hook<> {
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friend class KScheduler;
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friend class Process;
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public:
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explicit KThread(KernelCore& kernel);
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~KThread() override;
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using MutexWaitingThreads = std::vector<std::shared_ptr<KThread>>;
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using ThreadContext32 = Core::ARM_Interface::ThreadContext32;
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using ThreadContext64 = Core::ARM_Interface::ThreadContext64;
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/**
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* Creates and returns a new thread. The new thread is immediately scheduled
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* @param system The instance of the whole system
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* @param name The friendly name desired for the thread
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* @param entry_point The address at which the thread should start execution
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* @param priority The thread's priority
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* @param arg User data to pass to the thread
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* @param processor_id The ID(s) of the processors on which the thread is desired to be run
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* @param stack_top The address of the thread's stack top
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* @param owner_process The parent process for the thread, if null, it's a kernel thread
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* @return A shared pointer to the newly created thread
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*/
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static ResultVal<std::shared_ptr<KThread>> Create(Core::System& system, ThreadType type_flags,
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std::string name, VAddr entry_point,
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u32 priority, u64 arg, s32 processor_id,
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VAddr stack_top, Process* owner_process);
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/**
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* Creates and returns a new thread. The new thread is immediately scheduled
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* @param system The instance of the whole system
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* @param name The friendly name desired for the thread
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* @param entry_point The address at which the thread should start execution
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* @param priority The thread's priority
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* @param arg User data to pass to the thread
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* @param processor_id The ID(s) of the processors on which the thread is desired to be run
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* @param stack_top The address of the thread's stack top
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* @param owner_process The parent process for the thread, if null, it's a kernel thread
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* @param thread_start_func The function where the host context will start.
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* @param thread_start_parameter The parameter which will passed to host context on init
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* @return A shared pointer to the newly created thread
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*/
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static ResultVal<std::shared_ptr<KThread>> Create(
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Core::System& system, ThreadType type_flags, std::string name, VAddr entry_point,
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u32 priority, u64 arg, s32 processor_id, VAddr stack_top, Process* owner_process,
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std::function<void(void*)>&& thread_start_func, void* thread_start_parameter);
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std::string GetName() const override {
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return name;
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}
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void SetName(std::string new_name) {
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name = std::move(new_name);
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}
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std::string GetTypeName() const override {
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return "Thread";
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}
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static constexpr HandleType HANDLE_TYPE = HandleType::Thread;
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HandleType GetHandleType() const override {
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return HANDLE_TYPE;
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}
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/**
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* Gets the thread's current priority
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* @return The current thread's priority
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*/
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[[nodiscard]] s32 GetPriority() const {
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return current_priority;
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}
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/**
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* Sets the thread's current priority.
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* @param priority The new priority.
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*/
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void SetPriority(s32 priority) {
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current_priority = priority;
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}
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/**
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* Gets the thread's nominal priority.
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* @return The current thread's nominal priority.
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*/
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[[nodiscard]] s32 GetBasePriority() const {
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return base_priority;
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}
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/**
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* Sets the thread's nominal priority.
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* @param priority The new priority.
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*/
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void SetBasePriority(u32 priority);
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/// Changes the core that the thread is running or scheduled to run on.
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[[nodiscard]] ResultCode SetCoreAndAffinityMask(s32 new_core, u64 new_affinity_mask);
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/**
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* Gets the thread's thread ID
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* @return The thread's ID
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*/
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[[nodiscard]] u64 GetThreadID() const {
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return thread_id;
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}
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/// Resumes a thread from waiting
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void Wakeup();
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ResultCode Start();
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virtual bool IsSignaled() const override;
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/// Cancels a waiting operation that this thread may or may not be within.
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///
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/// When the thread is within a waiting state, this will set the thread's
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/// waiting result to signal a canceled wait. The function will then resume
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/// this thread.
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///
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void CancelWait();
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void SetSynchronizationResults(KSynchronizationObject* object, ResultCode result);
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void SetSyncedObject(KSynchronizationObject* object, ResultCode result) {
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SetSynchronizationResults(object, result);
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}
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ResultCode GetWaitResult(KSynchronizationObject** out) const {
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*out = signaling_object;
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return signaling_result;
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}
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ResultCode GetSignalingResult() const {
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return signaling_result;
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}
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/**
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* Stops a thread, invalidating it from further use
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*/
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void Stop();
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/*
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* Returns the Thread Local Storage address of the current thread
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* @returns VAddr of the thread's TLS
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*/
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VAddr GetTLSAddress() const {
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return tls_address;
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}
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/*
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* Returns the value of the TPIDR_EL0 Read/Write system register for this thread.
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* @returns The value of the TPIDR_EL0 register.
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*/
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u64 GetTPIDR_EL0() const {
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return tpidr_el0;
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}
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/// Sets the value of the TPIDR_EL0 Read/Write system register for this thread.
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void SetTPIDR_EL0(u64 value) {
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tpidr_el0 = value;
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}
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/*
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* Returns the address of the current thread's command buffer, located in the TLS.
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* @returns VAddr of the thread's command buffer.
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*/
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VAddr GetCommandBufferAddress() const;
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ThreadContext32& GetContext32() {
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return context_32;
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}
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const ThreadContext32& GetContext32() const {
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return context_32;
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}
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ThreadContext64& GetContext64() {
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return context_64;
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}
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const ThreadContext64& GetContext64() const {
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return context_64;
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}
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bool IsKernelThread() const {
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return type == ThreadType::Kernel;
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}
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bool WasRunning() const {
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return was_running;
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}
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void SetWasRunning(bool value) {
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was_running = value;
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}
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std::shared_ptr<Common::Fiber>& GetHostContext();
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ThreadState GetState() const {
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return thread_state & ThreadState::Mask;
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}
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ThreadState GetRawState() const {
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return thread_state;
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}
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void SetState(ThreadState state);
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s64 GetLastScheduledTick() const {
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return last_scheduled_tick;
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}
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void SetLastScheduledTick(s64 tick) {
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last_scheduled_tick = tick;
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}
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u64 GetTotalCPUTimeTicks() const {
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return total_cpu_time_ticks;
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}
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void UpdateCPUTimeTicks(u64 ticks) {
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total_cpu_time_ticks += ticks;
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}
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s32 GetProcessorID() const {
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return processor_id;
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}
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s32 GetActiveCore() const {
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return GetProcessorID();
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}
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void SetProcessorID(s32 new_core) {
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processor_id = new_core;
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}
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void SetActiveCore(s32 new_core) {
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processor_id = new_core;
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}
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Process* GetOwnerProcess() {
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return owner_process;
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}
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const Process* GetOwnerProcess() const {
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return owner_process;
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}
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const MutexWaitingThreads& GetMutexWaitingThreads() const {
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return wait_mutex_threads;
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}
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KThread* GetLockOwner() const {
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return lock_owner;
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}
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void SetLockOwner(KThread* owner) {
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lock_owner = owner;
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}
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u32 GetIdealCore() const {
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return ideal_core;
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}
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const KAffinityMask& GetAffinityMask() const {
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return affinity_mask;
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}
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ResultCode SetActivity(ThreadActivity value);
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/// Sleeps this thread for the given amount of nanoseconds.
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ResultCode Sleep(s64 nanoseconds);
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s64 GetYieldScheduleCount() const {
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return schedule_count;
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}
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void SetYieldScheduleCount(s64 count) {
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schedule_count = count;
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}
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bool IsRunning() const {
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return is_running;
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}
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void SetIsRunning(bool value) {
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is_running = value;
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}
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bool IsWaitCancelled() const {
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return is_sync_cancelled;
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}
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void ClearWaitCancelled() {
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is_sync_cancelled = false;
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}
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Handle GetGlobalHandle() const {
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return global_handle;
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}
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bool IsCancellable() const {
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return is_cancellable;
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}
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void SetCancellable() {
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is_cancellable = true;
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}
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void ClearCancellable() {
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is_cancellable = false;
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}
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bool IsTerminationRequested() const {
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return will_be_terminated || GetRawState() == ThreadState::Terminated;
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}
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bool IsPaused() const {
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return pausing_state != 0;
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}
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bool IsContinuousOnSVC() const {
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return is_continuous_on_svc;
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}
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void SetContinuousOnSVC(bool is_continuous) {
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is_continuous_on_svc = is_continuous;
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}
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bool HasExited() const {
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return has_exited;
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}
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class QueueEntry {
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public:
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constexpr QueueEntry() = default;
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constexpr void Initialize() {
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prev = nullptr;
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next = nullptr;
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}
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constexpr KThread* GetPrev() const {
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return prev;
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}
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constexpr KThread* GetNext() const {
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return next;
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}
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constexpr void SetPrev(KThread* thread) {
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prev = thread;
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}
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constexpr void SetNext(KThread* thread) {
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next = thread;
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}
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private:
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KThread* prev{};
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KThread* next{};
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};
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QueueEntry& GetPriorityQueueEntry(s32 core) {
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return per_core_priority_queue_entry[core];
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}
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const QueueEntry& GetPriorityQueueEntry(s32 core) const {
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return per_core_priority_queue_entry[core];
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}
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s32 GetDisableDispatchCount() const {
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return disable_count;
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}
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void DisableDispatch() {
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ASSERT(GetDisableDispatchCount() >= 0);
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disable_count++;
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}
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void EnableDispatch() {
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ASSERT(GetDisableDispatchCount() > 0);
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disable_count--;
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}
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void SetWaitReasonForDebugging(ThreadWaitReasonForDebugging reason) {
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wait_reason_for_debugging = reason;
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}
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[[nodiscard]] ThreadWaitReasonForDebugging GetWaitReasonForDebugging() const {
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return wait_reason_for_debugging;
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}
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void SetWaitObjectsForDebugging(const std::span<KSynchronizationObject*>& objects) {
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wait_objects_for_debugging.clear();
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wait_objects_for_debugging.reserve(objects.size());
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for (const auto& object : objects) {
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wait_objects_for_debugging.emplace_back(object);
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}
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}
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[[nodiscard]] const std::vector<KSynchronizationObject*>& GetWaitObjectsForDebugging() const {
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return wait_objects_for_debugging;
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}
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void SetMutexWaitAddressForDebugging(VAddr address) {
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mutex_wait_address_for_debugging = address;
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}
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[[nodiscard]] VAddr GetMutexWaitAddressForDebugging() const {
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return mutex_wait_address_for_debugging;
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}
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void AddWaiter(KThread* thread);
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void RemoveWaiter(KThread* thread);
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[[nodiscard]] KThread* RemoveWaiterByKey(s32* out_num_waiters, VAddr key);
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[[nodiscard]] VAddr GetAddressKey() const {
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return address_key;
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}
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[[nodiscard]] u32 GetAddressKeyValue() const {
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return address_key_value;
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}
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void SetAddressKey(VAddr key) {
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address_key = key;
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}
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void SetAddressKey(VAddr key, u32 val) {
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address_key = key;
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address_key_value = val;
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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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std::array<KSynchronizationObject*, Svc::ArgumentHandleCountMax> sync_objects{};
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std::array<Handle,
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Svc::ArgumentHandleCountMax*(sizeof(KSynchronizationObject*) / sizeof(Handle))>
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handles;
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constexpr SyncObjectBuffer() {}
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};
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static_assert(sizeof(SyncObjectBuffer::sync_objects) == sizeof(SyncObjectBuffer::handles));
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struct ConditionVariableComparator {
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struct LightCompareType {
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u64 cv_key{};
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s32 priority{};
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[[nodiscard]] constexpr u64 GetConditionVariableKey() const {
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return cv_key;
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}
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|
[[nodiscard]] constexpr s32 GetPriority() const {
|
|
return priority;
|
|
}
|
|
};
|
|
|
|
template <typename T>
|
|
requires(
|
|
std::same_as<T, KThread> ||
|
|
std::same_as<T, LightCompareType>) static constexpr int Compare(const T& lhs,
|
|
const KThread& rhs) {
|
|
const uintptr_t l_key = lhs.GetConditionVariableKey();
|
|
const uintptr_t r_key = rhs.GetConditionVariableKey();
|
|
|
|
if (l_key < r_key) {
|
|
// Sort first by key
|
|
return -1;
|
|
} else if (l_key == r_key && lhs.GetPriority() < rhs.GetPriority()) {
|
|
// And then by priority.
|
|
return -1;
|
|
} else {
|
|
return 1;
|
|
}
|
|
}
|
|
};
|
|
|
|
Common::IntrusiveRedBlackTreeNode condvar_arbiter_tree_node{};
|
|
|
|
using ConditionVariableThreadTreeTraits =
|
|
Common::IntrusiveRedBlackTreeMemberTraitsDeferredAssert<
|
|
&KThread::condvar_arbiter_tree_node>;
|
|
using ConditionVariableThreadTree =
|
|
ConditionVariableThreadTreeTraits::TreeType<ConditionVariableComparator>;
|
|
|
|
public:
|
|
using ConditionVariableThreadTreeType = ConditionVariableThreadTree;
|
|
|
|
[[nodiscard]] uintptr_t GetConditionVariableKey() const {
|
|
return condvar_key;
|
|
}
|
|
|
|
[[nodiscard]] uintptr_t GetAddressArbiterKey() const {
|
|
return condvar_key;
|
|
}
|
|
|
|
void SetConditionVariable(ConditionVariableThreadTree* tree, VAddr address, uintptr_t cv_key,
|
|
u32 value) {
|
|
condvar_tree = tree;
|
|
condvar_key = cv_key;
|
|
address_key = address;
|
|
address_key_value = value;
|
|
}
|
|
|
|
void ClearConditionVariable() {
|
|
condvar_tree = nullptr;
|
|
}
|
|
|
|
[[nodiscard]] bool IsWaitingForConditionVariable() const {
|
|
return condvar_tree != nullptr;
|
|
}
|
|
|
|
void SetAddressArbiter(ConditionVariableThreadTree* tree, uintptr_t address) {
|
|
condvar_tree = tree;
|
|
condvar_key = address;
|
|
}
|
|
|
|
void ClearAddressArbiter() {
|
|
condvar_tree = nullptr;
|
|
}
|
|
|
|
[[nodiscard]] bool IsWaitingForAddressArbiter() const {
|
|
return condvar_tree != nullptr;
|
|
}
|
|
|
|
[[nodiscard]] ConditionVariableThreadTree* GetConditionVariableTree() const {
|
|
return condvar_tree;
|
|
}
|
|
|
|
[[nodiscard]] bool HasWaiters() const {
|
|
return !waiter_list.empty();
|
|
}
|
|
|
|
private:
|
|
void AddSchedulingFlag(ThreadSchedFlags flag);
|
|
void RemoveSchedulingFlag(ThreadSchedFlags flag);
|
|
void AddWaiterImpl(KThread* thread);
|
|
void RemoveWaiterImpl(KThread* thread);
|
|
static void RestorePriority(KernelCore& kernel, KThread* thread);
|
|
|
|
Common::SpinLock context_guard{};
|
|
ThreadContext32 context_32{};
|
|
ThreadContext64 context_64{};
|
|
std::shared_ptr<Common::Fiber> host_context{};
|
|
|
|
ThreadState thread_state = ThreadState::Initialized;
|
|
|
|
u64 thread_id = 0;
|
|
|
|
VAddr entry_point = 0;
|
|
VAddr stack_top = 0;
|
|
std::atomic_int disable_count = 0;
|
|
|
|
ThreadType type;
|
|
|
|
/// Nominal thread priority, as set by the emulated application.
|
|
/// The nominal priority is the thread priority without priority
|
|
/// inheritance taken into account.
|
|
s32 base_priority{};
|
|
|
|
/// Current thread priority. This may change over the course of the
|
|
/// thread's lifetime in order to facilitate priority inheritance.
|
|
s32 current_priority{};
|
|
|
|
u64 total_cpu_time_ticks = 0; ///< Total CPU running ticks.
|
|
s64 schedule_count{};
|
|
s64 last_scheduled_tick{};
|
|
|
|
s32 processor_id = 0;
|
|
|
|
VAddr tls_address = 0; ///< Virtual address of the Thread Local Storage of the thread
|
|
u64 tpidr_el0 = 0; ///< TPIDR_EL0 read/write system register.
|
|
|
|
/// Process that owns this thread
|
|
Process* owner_process;
|
|
|
|
/// Objects that the thread is waiting on, in the same order as they were
|
|
/// passed to WaitSynchronization. This is used for debugging only.
|
|
std::vector<KSynchronizationObject*> wait_objects_for_debugging;
|
|
|
|
/// The current mutex wait address. This is used for debugging only.
|
|
VAddr mutex_wait_address_for_debugging{};
|
|
|
|
/// The reason the thread is waiting. This is used for debugging only.
|
|
ThreadWaitReasonForDebugging wait_reason_for_debugging{};
|
|
|
|
KSynchronizationObject* signaling_object;
|
|
ResultCode signaling_result{RESULT_SUCCESS};
|
|
|
|
/// List of threads that are waiting for a mutex that is held by this thread.
|
|
MutexWaitingThreads wait_mutex_threads;
|
|
|
|
/// Thread that owns the lock that this thread is waiting for.
|
|
KThread* lock_owner{};
|
|
|
|
/// Handle used as userdata to reference this object when inserting into the CoreTiming queue.
|
|
Handle global_handle = 0;
|
|
|
|
KScheduler* scheduler = nullptr;
|
|
|
|
std::array<QueueEntry, Core::Hardware::NUM_CPU_CORES> per_core_priority_queue_entry{};
|
|
|
|
u32 ideal_core{0xFFFFFFFF};
|
|
KAffinityMask affinity_mask{};
|
|
|
|
s32 ideal_core_override = -1;
|
|
u32 affinity_override_count = 0;
|
|
|
|
u32 pausing_state = 0;
|
|
bool is_running = false;
|
|
bool is_cancellable = false;
|
|
bool is_sync_cancelled = false;
|
|
|
|
bool is_continuous_on_svc = false;
|
|
|
|
bool will_be_terminated = false;
|
|
bool has_exited = false;
|
|
|
|
bool was_running = false;
|
|
|
|
bool signaled{};
|
|
|
|
ConditionVariableThreadTree* condvar_tree{};
|
|
uintptr_t condvar_key{};
|
|
VAddr address_key{};
|
|
u32 address_key_value{};
|
|
s32 num_kernel_waiters{};
|
|
|
|
using WaiterList = boost::intrusive::list<KThread>;
|
|
WaiterList waiter_list{};
|
|
WaiterList pinned_waiter_list{};
|
|
|
|
std::string name;
|
|
};
|
|
|
|
} // namespace Kernel
|