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suyu/src/core/hle/kernel/kernel.cpp
Lioncash 5c0408596f kernel/thread: Use a regular pointer for the owner/current process
There's no real need to use a shared pointer in these cases, and only
makes object management more fragile in terms of how easy it would be to
introduce cycles. Instead, just do the simple thing of using a regular
pointer. Much of this is just a hold-over from citra anyways.

It also doesn't make sense from a behavioral point of view for a
process' thread to prolong the lifetime of the process itself (the
process is supposed to own the thread, not the other way around).
2018-10-10 02:04:55 -04:00

330 lines
11 KiB
C++

// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <array>
#include <atomic>
#include <memory>
#include <mutex>
#include <utility>
#include "common/assert.h"
#include "common/logging/log.h"
#include "core/core.h"
#include "core/core_timing.h"
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/resource_limit.h"
#include "core/hle/kernel/thread.h"
#include "core/hle/kernel/timer.h"
#include "core/hle/lock.h"
#include "core/hle/result.h"
namespace Kernel {
/**
* Callback that will wake up the thread it was scheduled for
* @param thread_handle The handle of the thread that's been awoken
* @param cycles_late The number of CPU cycles that have passed since the desired wakeup time
*/
static void ThreadWakeupCallback(u64 thread_handle, [[maybe_unused]] int cycles_late) {
const auto proper_handle = static_cast<Handle>(thread_handle);
auto& system = Core::System::GetInstance();
// Lock the global kernel mutex when we enter the kernel HLE.
std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
SharedPtr<Thread> thread =
system.Kernel().RetrieveThreadFromWakeupCallbackHandleTable(proper_handle);
if (thread == nullptr) {
LOG_CRITICAL(Kernel, "Callback fired for invalid thread {:08X}", proper_handle);
return;
}
bool resume = true;
if (thread->GetStatus() == ThreadStatus::WaitSynchAny ||
thread->GetStatus() == ThreadStatus::WaitSynchAll ||
thread->GetStatus() == ThreadStatus::WaitHLEEvent) {
// Remove the thread from each of its waiting objects' waitlists
for (const auto& object : thread->GetWaitObjects()) {
object->RemoveWaitingThread(thread.get());
}
thread->ClearWaitObjects();
// Invoke the wakeup callback before clearing the wait objects
if (thread->HasWakeupCallback()) {
resume = thread->InvokeWakeupCallback(ThreadWakeupReason::Timeout, thread, nullptr, 0);
}
}
if (thread->GetMutexWaitAddress() != 0 || thread->GetCondVarWaitAddress() != 0 ||
thread->GetWaitHandle() != 0) {
ASSERT(thread->GetStatus() == ThreadStatus::WaitMutex);
thread->SetMutexWaitAddress(0);
thread->SetCondVarWaitAddress(0);
thread->SetWaitHandle(0);
auto* const lock_owner = thread->GetLockOwner();
// Threads waking up by timeout from WaitProcessWideKey do not perform priority inheritance
// and don't have a lock owner unless SignalProcessWideKey was called first and the thread
// wasn't awakened due to the mutex already being acquired.
if (lock_owner != nullptr) {
lock_owner->RemoveMutexWaiter(thread);
}
}
if (thread->GetArbiterWaitAddress() != 0) {
ASSERT(thread->GetStatus() == ThreadStatus::WaitArb);
thread->SetArbiterWaitAddress(0);
}
if (resume) {
thread->ResumeFromWait();
}
}
/// The timer callback event, called when a timer is fired
static void TimerCallback(u64 timer_handle, int cycles_late) {
const auto proper_handle = static_cast<Handle>(timer_handle);
auto& system = Core::System::GetInstance();
SharedPtr<Timer> timer = system.Kernel().RetrieveTimerFromCallbackHandleTable(proper_handle);
if (timer == nullptr) {
LOG_CRITICAL(Kernel, "Callback fired for invalid timer {:016X}", timer_handle);
return;
}
timer->Signal(cycles_late);
}
struct KernelCore::Impl {
void Initialize(KernelCore& kernel) {
Shutdown();
InitializeResourceLimits(kernel);
InitializeThreads();
InitializeTimers();
}
void Shutdown() {
next_object_id = 0;
next_process_id = 10;
next_thread_id = 1;
process_list.clear();
current_process = nullptr;
handle_table.Clear();
resource_limits.fill(nullptr);
thread_wakeup_callback_handle_table.Clear();
thread_wakeup_event_type = nullptr;
timer_callback_handle_table.Clear();
timer_callback_event_type = nullptr;
named_ports.clear();
}
void InitializeResourceLimits(KernelCore& kernel) {
// Create the four resource limits that the system uses
// Create the APPLICATION resource limit
SharedPtr<ResourceLimit> resource_limit = ResourceLimit::Create(kernel, "Applications");
resource_limit->max_priority = 0x18;
resource_limit->max_commit = 0x4000000;
resource_limit->max_threads = 0x20;
resource_limit->max_events = 0x20;
resource_limit->max_mutexes = 0x20;
resource_limit->max_semaphores = 0x8;
resource_limit->max_timers = 0x8;
resource_limit->max_shared_mems = 0x10;
resource_limit->max_address_arbiters = 0x2;
resource_limit->max_cpu_time = 0x1E;
resource_limits[static_cast<u8>(ResourceLimitCategory::APPLICATION)] = resource_limit;
// Create the SYS_APPLET resource limit
resource_limit = ResourceLimit::Create(kernel, "System Applets");
resource_limit->max_priority = 0x4;
resource_limit->max_commit = 0x5E00000;
resource_limit->max_threads = 0x1D;
resource_limit->max_events = 0xB;
resource_limit->max_mutexes = 0x8;
resource_limit->max_semaphores = 0x4;
resource_limit->max_timers = 0x4;
resource_limit->max_shared_mems = 0x8;
resource_limit->max_address_arbiters = 0x3;
resource_limit->max_cpu_time = 0x2710;
resource_limits[static_cast<u8>(ResourceLimitCategory::SYS_APPLET)] = resource_limit;
// Create the LIB_APPLET resource limit
resource_limit = ResourceLimit::Create(kernel, "Library Applets");
resource_limit->max_priority = 0x4;
resource_limit->max_commit = 0x600000;
resource_limit->max_threads = 0xE;
resource_limit->max_events = 0x8;
resource_limit->max_mutexes = 0x8;
resource_limit->max_semaphores = 0x4;
resource_limit->max_timers = 0x4;
resource_limit->max_shared_mems = 0x8;
resource_limit->max_address_arbiters = 0x1;
resource_limit->max_cpu_time = 0x2710;
resource_limits[static_cast<u8>(ResourceLimitCategory::LIB_APPLET)] = resource_limit;
// Create the OTHER resource limit
resource_limit = ResourceLimit::Create(kernel, "Others");
resource_limit->max_priority = 0x4;
resource_limit->max_commit = 0x2180000;
resource_limit->max_threads = 0xE1;
resource_limit->max_events = 0x108;
resource_limit->max_mutexes = 0x25;
resource_limit->max_semaphores = 0x43;
resource_limit->max_timers = 0x2C;
resource_limit->max_shared_mems = 0x1F;
resource_limit->max_address_arbiters = 0x2D;
resource_limit->max_cpu_time = 0x3E8;
resource_limits[static_cast<u8>(ResourceLimitCategory::OTHER)] = resource_limit;
}
void InitializeThreads() {
thread_wakeup_event_type =
CoreTiming::RegisterEvent("ThreadWakeupCallback", ThreadWakeupCallback);
}
void InitializeTimers() {
timer_callback_handle_table.Clear();
timer_callback_event_type = CoreTiming::RegisterEvent("TimerCallback", TimerCallback);
}
std::atomic<u32> next_object_id{0};
// TODO(Subv): Start the process ids from 10 for now, as lower PIDs are
// reserved for low-level services
std::atomic<u32> next_process_id{10};
std::atomic<u32> next_thread_id{1};
// Lists all processes that exist in the current session.
std::vector<SharedPtr<Process>> process_list;
Process* current_process = nullptr;
Kernel::HandleTable handle_table;
std::array<SharedPtr<ResourceLimit>, 4> resource_limits;
/// The event type of the generic timer callback event
CoreTiming::EventType* timer_callback_event_type = nullptr;
// TODO(yuriks): This can be removed if Timer objects are explicitly pooled in the future,
// allowing us to simply use a pool index or similar.
Kernel::HandleTable timer_callback_handle_table;
CoreTiming::EventType* thread_wakeup_event_type = nullptr;
// TODO(yuriks): This can be removed if Thread objects are explicitly pooled in the future,
// allowing us to simply use a pool index or similar.
Kernel::HandleTable thread_wakeup_callback_handle_table;
/// Map of named ports managed by the kernel, which can be retrieved using
/// the ConnectToPort SVC.
NamedPortTable named_ports;
};
KernelCore::KernelCore() : impl{std::make_unique<Impl>()} {}
KernelCore::~KernelCore() {
Shutdown();
}
void KernelCore::Initialize() {
impl->Initialize(*this);
}
void KernelCore::Shutdown() {
impl->Shutdown();
}
Kernel::HandleTable& KernelCore::HandleTable() {
return impl->handle_table;
}
const Kernel::HandleTable& KernelCore::HandleTable() const {
return impl->handle_table;
}
SharedPtr<ResourceLimit> KernelCore::ResourceLimitForCategory(
ResourceLimitCategory category) const {
return impl->resource_limits.at(static_cast<std::size_t>(category));
}
SharedPtr<Thread> KernelCore::RetrieveThreadFromWakeupCallbackHandleTable(Handle handle) const {
return impl->thread_wakeup_callback_handle_table.Get<Thread>(handle);
}
SharedPtr<Timer> KernelCore::RetrieveTimerFromCallbackHandleTable(Handle handle) const {
return impl->timer_callback_handle_table.Get<Timer>(handle);
}
void KernelCore::AppendNewProcess(SharedPtr<Process> process) {
impl->process_list.push_back(std::move(process));
}
void KernelCore::MakeCurrentProcess(Process* process) {
impl->current_process = process;
}
Process* KernelCore::CurrentProcess() {
return impl->current_process;
}
const Process* KernelCore::CurrentProcess() const {
return impl->current_process;
}
void KernelCore::AddNamedPort(std::string name, SharedPtr<ClientPort> port) {
impl->named_ports.emplace(std::move(name), std::move(port));
}
KernelCore::NamedPortTable::iterator KernelCore::FindNamedPort(const std::string& name) {
return impl->named_ports.find(name);
}
KernelCore::NamedPortTable::const_iterator KernelCore::FindNamedPort(
const std::string& name) const {
return impl->named_ports.find(name);
}
bool KernelCore::IsValidNamedPort(NamedPortTable::const_iterator port) const {
return port != impl->named_ports.cend();
}
u32 KernelCore::CreateNewObjectID() {
return impl->next_object_id++;
}
u32 KernelCore::CreateNewThreadID() {
return impl->next_thread_id++;
}
u32 KernelCore::CreateNewProcessID() {
return impl->next_process_id++;
}
ResultVal<Handle> KernelCore::CreateTimerCallbackHandle(const SharedPtr<Timer>& timer) {
return impl->timer_callback_handle_table.Create(timer);
}
CoreTiming::EventType* KernelCore::ThreadWakeupCallbackEventType() const {
return impl->thread_wakeup_event_type;
}
CoreTiming::EventType* KernelCore::TimerCallbackEventType() const {
return impl->timer_callback_event_type;
}
Kernel::HandleTable& KernelCore::ThreadWakeupCallbackHandleTable() {
return impl->thread_wakeup_callback_handle_table;
}
const Kernel::HandleTable& KernelCore::ThreadWakeupCallbackHandleTable() const {
return impl->thread_wakeup_callback_handle_table;
}
} // namespace Kernel