summaryrefslogtreecommitdiffstats
path: root/src/core/hle/kernel/kernel.cpp
blob: dd749eed4897dfb028b819efaa33610713274b88 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#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/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);
    const 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();
    }
}

struct KernelCore::Impl {
    void Initialize(KernelCore& kernel, Core::Timing::CoreTiming& core_timing) {
        Shutdown();

        InitializeSystemResourceLimit(kernel);
        InitializeThreads(core_timing);
    }

    void Shutdown() {
        next_object_id = 0;
        next_process_id = Process::ProcessIDMin;
        next_thread_id = 1;

        process_list.clear();
        current_process = nullptr;

        system_resource_limit = nullptr;

        thread_wakeup_callback_handle_table.Clear();
        thread_wakeup_event_type = nullptr;

        named_ports.clear();
    }

    // Creates the default system resource limit
    void InitializeSystemResourceLimit(KernelCore& kernel) {
        system_resource_limit = ResourceLimit::Create(kernel, "System");

        // If setting the default system values fails, then something seriously wrong has occurred.
        ASSERT(system_resource_limit->SetLimitValue(ResourceType::PhysicalMemory, 0x200000000)
                   .IsSuccess());
        ASSERT(system_resource_limit->SetLimitValue(ResourceType::Threads, 800).IsSuccess());
        ASSERT(system_resource_limit->SetLimitValue(ResourceType::Events, 700).IsSuccess());
        ASSERT(system_resource_limit->SetLimitValue(ResourceType::TransferMemory, 200).IsSuccess());
        ASSERT(system_resource_limit->SetLimitValue(ResourceType::Sessions, 900).IsSuccess());
    }

    void InitializeThreads(Core::Timing::CoreTiming& core_timing) {
        thread_wakeup_event_type =
            core_timing.RegisterEvent("ThreadWakeupCallback", ThreadWakeupCallback);
    }

    std::atomic<u32> next_object_id{0};
    std::atomic<u64> next_process_id{Process::ProcessIDMin};
    std::atomic<u64> next_thread_id{1};

    // Lists all processes that exist in the current session.
    std::vector<SharedPtr<Process>> process_list;
    Process* current_process = nullptr;

    SharedPtr<ResourceLimit> system_resource_limit;

    Core::Timing::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(Core::Timing::CoreTiming& core_timing) {
    impl->Initialize(*this, core_timing);
}

void KernelCore::Shutdown() {
    impl->Shutdown();
}

SharedPtr<ResourceLimit> KernelCore::GetSystemResourceLimit() const {
    return impl->system_resource_limit;
}

SharedPtr<Thread> KernelCore::RetrieveThreadFromWakeupCallbackHandleTable(Handle handle) const {
    return impl->thread_wakeup_callback_handle_table.Get<Thread>(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++;
}

u64 KernelCore::CreateNewThreadID() {
    return impl->next_thread_id++;
}

u64 KernelCore::CreateNewProcessID() {
    return impl->next_process_id++;
}

Core::Timing::EventType* KernelCore::ThreadWakeupCallbackEventType() const {
    return impl->thread_wakeup_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