Merge pull request #4908 from hamish-milne/feature/savestates-2

Save states

CMakeLists.txt

@@ -1,5 +1,9 @@
 # CMake 3.8 required for 17 to be a valid value for CXX_STANDARD
 cmake_minimum_required(VERSION 3.8)
+if (${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.15)
+    # Don't override the warning flags in MSVC:
+    cmake_policy(SET CMP0092 NEW)
+endif ()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/externals/cmake-modules")
 include(DownloadExternals)
@@ -35,6 +39,8 @@ CMAKE_DEPENDENT_OPTION(ENABLE_MF "Use Media Foundation decoder (preferred over F
 
 CMAKE_DEPENDENT_OPTION(COMPILE_WITH_DWARF "Add DWARF debugging information" ON "MINGW" OFF)
 
+option(USE_SYSTEM_BOOST "Use the system Boost libs (instead of the bundled ones)" OFF)
+
 CMAKE_DEPENDENT_OPTION(ENABLE_FDK "Use FDK AAC decoder" OFF "NOT ENABLE_FFMPEG_AUDIO_DECODER;NOT ENABLE_MF" OFF)
 
 if(NOT EXISTS ${PROJECT_SOURCE_DIR}/.git/hooks/pre-commit)
@@ -126,16 +132,6 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
 # System imported libraries
 # ======================
 
-find_package(Boost 1.66.0 QUIET)
-if (NOT Boost_FOUND)
-    message(STATUS "Boost 1.66.0 or newer not found, falling back to externals")
-
-    set(BOOST_ROOT "${PROJECT_SOURCE_DIR}/externals/boost")
-    set(Boost_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/externals/boost")
-    set(Boost_NO_SYSTEM_PATHS OFF)
-    find_package(Boost QUIET REQUIRED)
-endif()
-
 # Prefer the -pthread flag on Linux.
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)
@@ -339,8 +335,21 @@ git_describe(GIT_DESC --always --long --dirty)
 git_branch_name(GIT_BRANCH)
 get_timestamp(BUILD_DATE)
 
+if (NOT USE_SYSTEM_BOOST)
+    add_definitions( -DBOOST_ALL_NO_LIB )
+endif()
+
 enable_testing()
 add_subdirectory(externals)
+
+# Boost
+if (USE_SYSTEM_BOOST)
+    find_package(Boost 1.70.0 QUIET REQUIRED)
+else()
+    add_library(Boost::boost ALIAS boost)
+    add_library(Boost::serialization ALIAS boost_serialization)
+endif()
+
 add_subdirectory(src)
 add_subdirectory(dist/installer)
 

externals/CMakeLists.txt

@@ -1,9 +1,28 @@
 # Definitions for all external bundled libraries
 
+# Suppress warnings from external libraries
+if (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
+    add_compile_options(/W0)
+endif()
+
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
 include(DownloadExternals)
 include(ExternalProject)
 
+# Boost
+set(BOOST_ROOT "${CMAKE_SOURCE_DIR}/externals/boost")
+set(Boost_INCLUDE_DIR "${CMAKE_SOURCE_DIR}/externals/boost")
+set(Boost_NO_SYSTEM_PATHS ON)
+add_library(boost INTERFACE)
+target_include_directories(boost SYSTEM INTERFACE ${Boost_INCLUDE_DIR})
+
+# Boost::serialization
+file(GLOB boost_serialization_SRC "${CMAKE_SOURCE_DIR}/externals/boost/libs/serialization/src/*.cpp")
+add_library(boost_serialization STATIC ${boost_serialization_SRC})
+target_link_libraries(boost_serialization PUBLIC boost)
+
+# Add additional boost libs here; remember to ALIAS them in the root CMakeLists!
+
 # Catch
 add_library(catch-single-include INTERFACE)
 target_include_directories(catch-single-include INTERFACE catch/single_include)

externals/boost

@@ -1 +1 @@
-Subproject commit 502437b2ae3f1da821aa7d5d5174ec356fa89269
+Subproject commit 36603a1e665e849d29b1735a12c0a51284a10dd0

src/CMakeLists.txt

@@ -31,6 +31,7 @@ if (MSVC)
     # /Zc:externConstexpr - Allow extern constexpr variables to have external linkage, like the standard mandates
     # /Zc:inline          - Let codegen omit inline functions in object files
     # /Zc:throwingNew     - Let codegen assume `operator new` (without std::nothrow) will never return null
+    # /external:*         - Suppress warnings from external headers
     add_compile_options(
         /W3
         /MP
@@ -42,6 +43,10 @@ if (MSVC)
         /Zc:externConstexpr
         /Zc:inline
         /Zc:throwingNew
+        /experimental:external
+        /external:I "${CMAKE_SOURCE_DIR}/externals"
+        /external:anglebrackets
+        /external:W0
     )
 
     # /GS- - No stack buffer overflow checks

src/audio_core/CMakeLists.txt

@@ -35,7 +35,7 @@ add_library(audio_core STATIC
 
 create_target_directory_groups(audio_core)
 
-target_link_libraries(audio_core PUBLIC common core)
+target_link_libraries(audio_core PUBLIC common)
 target_link_libraries(audio_core PRIVATE SoundTouch teakra)
 
 if(ENABLE_MF)

src/audio_core/dsp_interface.h

@@ -6,6 +6,7 @@
 
 #include <memory>
 #include <vector>
+#include <boost/serialization/access.hpp>
 #include "audio_core/audio_types.h"
 #include "audio_core/time_stretch.h"
 #include "common/common_types.h"
@@ -113,6 +114,10 @@ private:
     Common::RingBuffer<s16, 0x2000, 2> fifo;
     std::array<s16, 2> last_frame{};
     TimeStretcher time_stretcher;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {}
+    friend class boost::serialization::access;
 };
 
 } // namespace AudioCore

src/audio_core/hle/hle.cpp

@@ -2,6 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <boost/serialization/array.hpp>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/vector.hpp>
+#include <boost/serialization/weak_ptr.hpp>
 #include "audio_core/audio_types.h"
 #ifdef HAVE_MF
 #include "audio_core/hle/wmf_decoder.h"
@@ -26,11 +31,22 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 
+SERIALIZE_EXPORT_IMPL(AudioCore::DspHle)
+
 using InterruptType = Service::DSP::DSP_DSP::InterruptType;
 using Service::DSP::DSP_DSP;
 
 namespace AudioCore {
 
+DspHle::DspHle() : DspHle(Core::System::GetInstance().Memory()) {}
+
+template <class Archive>
+void DspHle::serialize(Archive& ar, const unsigned int) {
+    ar& boost::serialization::base_object<DspInterface>(*this);
+    ar&* impl.get();
+}
+SERIALIZE_IMPL(DspHle)
+
 static constexpr u64 audio_frame_ticks = 1310252ull; ///< Units: ARM11 cycles
 
 struct DspHle::Impl final {
@@ -64,7 +80,7 @@ private:
     void AudioTickCallback(s64 cycles_late);
 
     DspState dsp_state = DspState::Off;
-    std::array<std::vector<u8>, num_dsp_pipe> pipe_data;
+    std::array<std::vector<u8>, num_dsp_pipe> pipe_data{};
 
     HLE::DspMemory dsp_memory;
     std::array<HLE::Source, HLE::num_sources> sources{{
@@ -74,14 +90,25 @@ private:
         HLE::Source(15), HLE::Source(16), HLE::Source(17), HLE::Source(18), HLE::Source(19),
         HLE::Source(20), HLE::Source(21), HLE::Source(22), HLE::Source(23),
     }};
-    HLE::Mixers mixers;
+    HLE::Mixers mixers{};
 
     DspHle& parent;
-    Core::TimingEventType* tick_event;
+    Core::TimingEventType* tick_event{};
 
-    std::unique_ptr<HLE::DecoderBase> decoder;
+    std::unique_ptr<HLE::DecoderBase> decoder{};
 
-    std::weak_ptr<DSP_DSP> dsp_dsp;
+    std::weak_ptr<DSP_DSP> dsp_dsp{};
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& dsp_state;
+        ar& pipe_data;
+        ar& dsp_memory.raw_memory;
+        ar& sources;
+        ar& mixers;
+        ar& dsp_dsp;
+    }
+    friend class boost::serialization::access;
 };
 
 DspHle::Impl::Impl(DspHle& parent_, Memory::MemorySystem& memory) : parent(parent_) {

src/audio_core/hle/hle.h

@@ -7,6 +7,7 @@
 #include <array>
 #include <memory>
 #include <vector>
+#include <boost/serialization/export.hpp>
 #include "audio_core/audio_types.h"
 #include "audio_core/dsp_interface.h"
 #include "common/common_types.h"
@@ -42,6 +43,14 @@ private:
     struct Impl;
     friend struct Impl;
     std::unique_ptr<Impl> impl;
+
+    DspHle();
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int);
+    friend class boost::serialization::access;
 };
 
 } // namespace AudioCore
+
+BOOST_CLASS_EXPORT_KEY(AudioCore::DspHle)

src/audio_core/hle/mixers.h

@@ -5,6 +5,7 @@
 #pragma once
 
 #include <array>
+#include <boost/serialization/array.hpp>
 #include "audio_core/audio_types.h"
 #include "audio_core/hle/shared_memory.h"
 
@@ -54,6 +55,17 @@ private:
     void DownmixAndMixIntoCurrentFrame(float gain, const QuadFrame32& samples);
     /// INTERNAL: Generate DspStatus based on internal state.
     DspStatus GetCurrentStatus() const;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& current_frame;
+        ar& state.intermediate_mixer_volume;
+        ar& state.mixer1_enabled;
+        ar& state.mixer2_enabled;
+        ar& state.intermediate_mix_buffer;
+        ar& state.output_format;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace AudioCore::HLE

src/audio_core/hle/shared_memory.h

@@ -8,6 +8,7 @@
 #include <cstddef>
 #include <memory>
 #include <type_traits>
+#include <boost/serialization/access.hpp>
 #include "audio_core/audio_types.h"
 #include "audio_core/hle/common.h"
 #include "common/bit_field.h"
@@ -56,6 +57,12 @@ private:
         return (value << 16) | (value >> 16);
     }
     u32_le storage;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& storage;
+    }
+    friend class boost::serialization::access;
 };
 static_assert(std::is_trivially_copyable<u32_dsp>::value, "u32_dsp isn't trivially copyable");
 

src/audio_core/hle/source.h

@@ -6,6 +6,10 @@
 
 #include <array>
 #include <vector>
+#include <boost/serialization/array.hpp>
+#include <boost/serialization/deque.hpp>
+#include <boost/serialization/priority_queue.hpp>
+#include <boost/serialization/vector.hpp>
 #include <queue>
 #include "audio_core/audio_types.h"
 #include "audio_core/codec.h"
@@ -85,6 +89,24 @@ private:
         bool from_queue;
         u32_dsp play_position; // = 0;
         bool has_played;       // = false;
+
+    private:
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int) {
+            ar& physical_address;
+            ar& length;
+            ar& adpcm_ps;
+            ar& adpcm_yn;
+            ar& adpcm_dirty;
+            ar& is_looping;
+            ar& buffer_id;
+            ar& mono_or_stereo;
+            ar& format;
+            ar& from_queue;
+            ar& play_position;
+            ar& has_played;
+        }
+        friend class boost::serialization::access;
     };
 
     struct BufferOrder {
@@ -107,7 +129,7 @@ private:
 
         // Buffer queue
 
-        std::priority_queue<Buffer, std::vector<Buffer>, BufferOrder> input_queue;
+        std::priority_queue<Buffer, std::vector<Buffer>, BufferOrder> input_queue = {};
         MonoOrStereo mono_or_stereo = MonoOrStereo::Mono;
         Format format = Format::ADPCM;
 
@@ -115,7 +137,7 @@ private:
 
         u32 current_sample_number = 0;
         u32 next_sample_number = 0;
-        AudioInterp::StereoBuffer16 current_buffer;
+        AudioInterp::StereoBuffer16 current_buffer = {};
 
         // buffer_id state
 
@@ -135,7 +157,27 @@ private:
 
         // Filter state
 
-        SourceFilters filters;
+        SourceFilters filters = {};
+
+    private:
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int) {
+            ar& enabled;
+            ar& sync;
+            ar& gain;
+            ar& input_queue;
+            ar& mono_or_stereo;
+            ar& format;
+            ar& current_sample_number;
+            ar& next_sample_number;
+            ar& current_buffer;
+            ar& buffer_update;
+            ar& current_buffer_id;
+            ar& adpcm_coeffs;
+            ar& rate_multiplier;
+            ar& interpolation_mode;
+        }
+        friend class boost::serialization::access;
 
     } state;
 
@@ -150,6 +192,12 @@ private:
     bool DequeueBuffer();
     /// INTERNAL: Generates a SourceStatus::Status based on our internal state.
     SourceStatus::Status GetCurrentStatus();
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& state;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace AudioCore::HLE

src/citra_qt/bootmanager.cpp

@@ -132,7 +132,9 @@ void OpenGLWindow::Present() {
         return;
 
     context->makeCurrent(this);
-    VideoCore::g_renderer->TryPresent(100);
+    if (VideoCore::g_renderer) {
+        VideoCore::g_renderer->TryPresent(100);
+    }
     context->swapBuffers(this);
     auto f = context->versionFunctions<QOpenGLFunctions_3_3_Core>();
     f->glFinish();

src/citra_qt/configuration/config.cpp

@@ -57,7 +57,7 @@ const std::array<std::array<int, 5>, Settings::NativeAnalog::NumAnalogs> Config:
 // This must be in alphabetical order according to action name as it must have the same order as
 // UISetting::values.shortcuts, which is alphabetically ordered.
 // clang-format off
-const std::array<UISettings::Shortcut, 21> default_hotkeys{
+const std::array<UISettings::Shortcut, 23> default_hotkeys{
     {{QStringLiteral("Advance Frame"),            QStringLiteral("Main Window"), {QStringLiteral("\\"), Qt::ApplicationShortcut}},
      {QStringLiteral("Capture Screenshot"),       QStringLiteral("Main Window"), {QStringLiteral("Ctrl+P"), Qt::ApplicationShortcut}},
      {QStringLiteral("Continue/Pause Emulation"), QStringLiteral("Main Window"), {QStringLiteral("F4"), Qt::WindowShortcut}},
@@ -73,6 +73,8 @@ const std::array<UISettings::Shortcut, 21> default_hotkeys{
      {QStringLiteral("Rotate Screens Upright"),   QStringLiteral("Main Window"), {QStringLiteral("F8"), Qt::WindowShortcut}},
      {QStringLiteral("Stop Emulation"),           QStringLiteral("Main Window"), {QStringLiteral("F5"), Qt::WindowShortcut}},
      {QStringLiteral("Swap Screens"),             QStringLiteral("Main Window"), {QStringLiteral("F9"), Qt::WindowShortcut}},
+     {QStringLiteral("Save to Oldest Slot"),      QStringLiteral("Main Window"), {QStringLiteral("Ctrl+C"), Qt::WindowShortcut}},
+     {QStringLiteral("Load from Newest Slot"),    QStringLiteral("Main Window"), {QStringLiteral("Ctrl+V"), Qt::WindowShortcut}},
      {QStringLiteral("Toggle Filter Bar"),        QStringLiteral("Main Window"), {QStringLiteral("Ctrl+F"), Qt::WindowShortcut}},
      {QStringLiteral("Toggle Frame Advancing"),   QStringLiteral("Main Window"), {QStringLiteral("Ctrl+A"), Qt::ApplicationShortcut}},
      {QStringLiteral("Toggle Screen Layout"),     QStringLiteral("Main Window"), {QStringLiteral("F10"), Qt::WindowShortcut}},

src/citra_qt/debugger/wait_tree.cpp

@@ -216,7 +216,7 @@ std::vector<std::unique_ptr<WaitTreeItem>> WaitTreeThread::GetChildren() const {
     std::vector<std::unique_ptr<WaitTreeItem>> list(WaitTreeWaitObject::GetChildren());
 
     const auto& thread = static_cast<const Kernel::Thread&>(object);
-    const auto* process = thread.owner_process;
+    const auto& process = thread.owner_process;
 
     QString processor;
     switch (thread.processor_id) {
@@ -237,6 +237,7 @@ std::vector<std::unique_ptr<WaitTreeItem>> WaitTreeThread::GetChildren() const {
         break;
     }
 
+    list.push_back(std::make_unique<WaitTreeText>(tr("object id = %1").arg(thread.GetObjectId())));
     list.push_back(std::make_unique<WaitTreeText>(tr("processor = %1").arg(processor)));
     list.push_back(std::make_unique<WaitTreeText>(tr("thread id = %1").arg(thread.GetThreadId())));
     list.push_back(

src/citra_qt/main.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <clocale>
+#include <fstream>
 #include <memory>
 #include <thread>
 #include <QDesktopWidget>
@@ -78,6 +79,7 @@
 #include "core/hle/service/nfc/nfc.h"
 #include "core/loader/loader.h"
 #include "core/movie.h"
+#include "core/savestate.h"
 #include "core/settings.h"
 #include "game_list_p.h"
 #include "video_core/renderer_base.h"
@@ -171,6 +173,7 @@ GMainWindow::GMainWindow() : config(new Config()), emu_thread(nullptr) {
     InitializeWidgets();
     InitializeDebugWidgets();
     InitializeRecentFileMenuActions();
+    InitializeSaveStateMenuActions();
     InitializeHotkeys();
     ShowUpdaterWidgets();
 
@@ -396,6 +399,32 @@ void GMainWindow::InitializeRecentFileMenuActions() {
     UpdateRecentFiles();
 }
 
+void GMainWindow::InitializeSaveStateMenuActions() {
+    for (u32 i = 0; i < Core::SaveStateSlotCount; ++i) {
+        actions_load_state[i] = new QAction(this);
+        actions_load_state[i]->setData(i + 1);
+        connect(actions_load_state[i], &QAction::triggered, this, &GMainWindow::OnLoadState);
+        ui.menu_Load_State->addAction(actions_load_state[i]);
+
+        actions_save_state[i] = new QAction(this);
+        actions_save_state[i]->setData(i + 1);
+        connect(actions_save_state[i], &QAction::triggered, this, &GMainWindow::OnSaveState);
+        ui.menu_Save_State->addAction(actions_save_state[i]);
+    }
+
+    connect(ui.action_Load_from_Newest_Slot, &QAction::triggered,
+            [this] { actions_load_state[newest_slot - 1]->trigger(); });
+    connect(ui.action_Save_to_Oldest_Slot, &QAction::triggered,
+            [this] { actions_save_state[oldest_slot - 1]->trigger(); });
+
+    connect(ui.menu_Load_State->menuAction(), &QAction::hovered, this,
+            &GMainWindow::UpdateSaveStates);
+    connect(ui.menu_Save_State->menuAction(), &QAction::hovered, this,
+            &GMainWindow::UpdateSaveStates);
+
+    UpdateSaveStates();
+}
+
 void GMainWindow::InitializeHotkeys() {
     hotkey_registry.LoadHotkeys();
 
@@ -509,6 +538,10 @@ void GMainWindow::InitializeHotkeys() {
                     OnCaptureScreenshot();
                 }
             });
+    connect(hotkey_registry.GetHotkey(main_window, ui.action_Load_from_Newest_Slot->text(), this),
+            &QShortcut::activated, ui.action_Load_from_Newest_Slot, &QAction::trigger);
+    connect(hotkey_registry.GetHotkey(main_window, ui.action_Save_to_Oldest_Slot->text(), this),
+            &QShortcut::activated, ui.action_Save_to_Oldest_Slot, &QAction::trigger);
 }
 
 void GMainWindow::ShowUpdaterWidgets() {
@@ -687,6 +720,7 @@ void GMainWindow::ConnectMenuEvents() {
         if (emulation_running) {
             ui.action_Enable_Frame_Advancing->setChecked(true);
             ui.action_Advance_Frame->setEnabled(true);
+            Core::System::GetInstance().frame_limiter.SetFrameAdvancing(true);
             Core::System::GetInstance().frame_limiter.AdvanceFrame();
         }
     });
@@ -1091,6 +1125,8 @@ void GMainWindow::ShutdownGame() {
     game_fps_label->setVisible(false);
     emu_frametime_label->setVisible(false);
 
+    UpdateSaveStates();
+
     emulation_running = false;
 
     if (defer_update_prompt) {
@@ -1137,6 +1173,62 @@ void GMainWindow::UpdateRecentFiles() {
     ui.menu_recent_files->setEnabled(num_recent_files != 0);
 }
 
+void GMainWindow::UpdateSaveStates() {
+    if (!Core::System::GetInstance().IsPoweredOn()) {
+        ui.menu_Load_State->setEnabled(false);
+        ui.menu_Save_State->setEnabled(false);
+        return;
+    }
+
+    ui.menu_Load_State->setEnabled(true);
+    ui.menu_Save_State->setEnabled(true);
+    ui.action_Load_from_Newest_Slot->setEnabled(false);
+
+    oldest_slot = newest_slot = 0;
+    oldest_slot_time = std::numeric_limits<u64>::max();
+    newest_slot_time = 0;
+
+    u64 title_id;
+    if (Core::System::GetInstance().GetAppLoader().ReadProgramId(title_id) !=
+        Loader::ResultStatus::Success) {
+        return;
+    }
+    auto savestates = Core::ListSaveStates(title_id);
+    for (u32 i = 0; i < Core::SaveStateSlotCount; ++i) {
+        actions_load_state[i]->setEnabled(false);
+        actions_load_state[i]->setText(tr("Slot %1").arg(i + 1));
+        actions_save_state[i]->setText(tr("Slot %1").arg(i + 1));
+    }
+    for (const auto& savestate : savestates) {
+        const auto text = tr("Slot %1 - %2")
+                              .arg(savestate.slot)
+                              .arg(QDateTime::fromSecsSinceEpoch(savestate.time)
+                                       .toString(QStringLiteral("yyyy-MM-dd hh:mm:ss")));
+        actions_load_state[savestate.slot - 1]->setEnabled(true);
+        actions_load_state[savestate.slot - 1]->setText(text);
+        actions_save_state[savestate.slot - 1]->setText(text);
+
+        ui.action_Load_from_Newest_Slot->setEnabled(true);
+
+        if (savestate.time > newest_slot_time) {
+            newest_slot = savestate.slot;
+            newest_slot_time = savestate.time;
+        }
+        if (savestate.time < oldest_slot_time) {
+            oldest_slot = savestate.slot;
+            oldest_slot_time = savestate.time;
+        }
+    }
+    for (u32 i = 0; i < Core::SaveStateSlotCount; ++i) {
+        if (!actions_load_state[i]->isEnabled()) {
+            // Prefer empty slot
+            oldest_slot = i + 1;
+            oldest_slot_time = 0;
+            break;
+        }
+    }
+}
+
 void GMainWindow::OnGameListLoadFile(QString game_path) {
     BootGame(game_path);
 }
@@ -1385,7 +1477,7 @@ void GMainWindow::OnCIAInstallFinished() {
 
 void GMainWindow::OnMenuRecentFile() {
     QAction* action = qobject_cast<QAction*>(sender());
-    assert(action);
+    ASSERT(action);
 
     const QString filename = action->data().toString();
     if (QFileInfo::exists(filename)) {
@@ -1429,6 +1521,8 @@ void GMainWindow::OnStartGame() {
     ui.action_Capture_Screenshot->setEnabled(true);
 
     discord_rpc->Update();
+
+    UpdateSaveStates();
 }
 
 void GMainWindow::OnPauseGame() {
@@ -1576,6 +1670,23 @@ void GMainWindow::OnCheats() {
     cheat_dialog.exec();
 }
 
+void GMainWindow::OnSaveState() {
+    QAction* action = qobject_cast<QAction*>(sender());
+    assert(action);
+
+    Core::System::GetInstance().SendSignal(Core::System::Signal::Save, action->data().toUInt());
+    Core::System::GetInstance().frame_limiter.AdvanceFrame();
+    newest_slot = action->data().toUInt();
+}
+
+void GMainWindow::OnLoadState() {
+    QAction* action = qobject_cast<QAction*>(sender());
+    assert(action);
+
+    Core::System::GetInstance().SendSignal(Core::System::Signal::Load, action->data().toUInt());
+    Core::System::GetInstance().frame_limiter.AdvanceFrame();
+}
+
 void GMainWindow::OnConfigure() {
     ConfigureDialog configureDialog(this, hotkey_registry,
                                     !multiplayer_state->IsHostingPublicRoom());
@@ -1968,6 +2079,9 @@ void GMainWindow::OnCoreError(Core::System::ResultStatus result, std::string det
 
         title = tr("System Archive Not Found");
         status_message = tr("System Archive Missing");
+    } else if (result == Core::System::ResultStatus::ErrorSavestate) {
+        title = tr("Save/load Error");
+        message = QString::fromStdString(details);
     } else {
         title = tr("Fatal Error");
         message =

src/citra_qt/main.h

@@ -4,6 +4,7 @@
 
 #pragma once
 
+#include <array>
 #include <memory>
 #include <QLabel>
 #include <QMainWindow>
@@ -14,6 +15,7 @@
 #include "common/announce_multiplayer_room.h"
 #include "core/core.h"
 #include "core/hle/service/am/am.h"
+#include "core/savestate.h"
 #include "ui_main.h"
 
 class AboutDialog;
@@ -106,6 +108,7 @@ private:
     void InitializeWidgets();
     void InitializeDebugWidgets();
     void InitializeRecentFileMenuActions();
+    void InitializeSaveStateMenuActions();
 
     void SetDefaultUIGeometry();
     void SyncMenuUISettings();
@@ -149,6 +152,8 @@ private:
      */
     void UpdateRecentFiles();
 
+    void UpdateSaveStates();
+
     /**
      * If the emulation is running,
      * asks the user if he really want to close the emulator
@@ -163,6 +168,8 @@ private slots:
     void OnStartGame();
     void OnPauseGame();
     void OnStopGame();
+    void OnSaveState();
+    void OnLoadState();
     void OnMenuReportCompatibility();
     /// Called whenever a user selects a game in the game list widget.
     void OnGameListLoadFile(QString game_path);
@@ -282,6 +289,13 @@ private:
     bool defer_update_prompt = false;
 
     QAction* actions_recent_files[max_recent_files_item];
+    std::array<QAction*, Core::SaveStateSlotCount> actions_load_state;
+    std::array<QAction*, Core::SaveStateSlotCount> actions_save_state;
+
+    u32 oldest_slot;
+    u64 oldest_slot_time;
+    u32 newest_slot;
+    u64 newest_slot_time;
 
     QTranslator translator;
 

src/citra_qt/main.ui

@@ -79,11 +79,28 @@
     <property name="title">
      <string>&amp;Emulation</string>
     </property>
+    <widget class="QMenu" name="menu_Save_State">
+     <property name="title">
+      <string>Save State</string>
+     </property>
+     <addaction name="action_Save_to_Oldest_Slot"/>
+     <addaction name="separator"/>
+    </widget>
+    <widget class="QMenu" name="menu_Load_State">
+     <property name="title">
+      <string>Load State</string>
+     </property>
+     <addaction name="action_Load_from_Newest_Slot"/>
+     <addaction name="separator"/>
+    </widget>
     <addaction name="action_Start"/>
     <addaction name="action_Pause"/>
     <addaction name="action_Stop"/>
     <addaction name="action_Restart"/>
     <addaction name="separator"/>
+    <addaction name="menu_Load_State"/>
+    <addaction name="menu_Save_State"/>
+    <addaction name="separator"/>
     <addaction name="action_Report_Compatibility"/>
     <addaction name="separator"/>
     <addaction name="action_Configure"/>
@@ -217,6 +234,22 @@
     <string>&amp;Stop</string>
    </property>
   </action>
+  <action name="action_Save">
+    <property name="enabled">
+      <bool>false</bool>
+    </property>
+    <property name="text">
+      <string>Save</string>
+    </property>
+  </action>
+  <action name="action_Load">
+    <property name="enabled">
+      <bool>false</bool>
+    </property>
+    <property name="text">
+      <string>Load</string>
+    </property>
+  </action>
   <action name="action_FAQ">
    <property name="text">
     <string>FAQ</string>
@@ -235,6 +268,16 @@
     <string>Single Window Mode</string>
    </property>
   </action>
+  <action name="action_Save_to_Oldest_Slot">
+   <property name="text">
+    <string>Save to Oldest Slot</string>
+   </property>
+  </action>
+  <action name="action_Load_from_Newest_Slot">
+   <property name="text">
+    <string>Load from Newest Slot</string>
+   </property>
+  </action>
   <action name="action_Configure">
    <property name="text">
     <string>Configure...</string>

src/common/CMakeLists.txt

@@ -54,6 +54,7 @@ add_custom_command(OUTPUT scm_rev.cpp
 add_library(common STATIC
     alignment.h
     announce_multiplayer_room.h
+    archives.h
     assert.h
     detached_tasks.cpp
     detached_tasks.h
@@ -66,6 +67,7 @@ add_library(common STATIC
     common_funcs.h
     common_paths.h
     common_types.h
+    construct.h
     file_util.cpp
     file_util.h
     hash.h
@@ -78,6 +80,8 @@ add_library(common STATIC
     logging/text_formatter.cpp
     logging/text_formatter.h
     math_util.h
+    memory_ref.h
+    memory_ref.cpp
     microprofile.cpp
     microprofile.h
     microprofileui.h
@@ -89,6 +93,11 @@ add_library(common STATIC
     scm_rev.cpp
     scm_rev.h
     scope_exit.h
+    serialization/atomic.h
+    serialization/boost_discrete_interval.hpp
+    serialization/boost_flat_set.h
+    serialization/boost_small_vector.hpp
+    serialization/boost_vector.hpp
     string_util.cpp
     string_util.h
     swap.h
@@ -121,7 +130,7 @@ endif()
 
 create_target_directory_groups(common)
 
-target_link_libraries(common PUBLIC fmt microprofile)
+target_link_libraries(common PUBLIC fmt microprofile Boost::boost Boost::serialization)
 target_link_libraries(common PRIVATE libzstd_static)
 if (ARCHITECTURE_x86_64)
     target_link_libraries(common PRIVATE xbyak)

src/common/archives.h

@@ -0,0 +1,21 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/archive/binary_iarchive.hpp>
+#include <boost/archive/binary_oarchive.hpp>
+#include <boost/serialization/export.hpp>
+
+using iarchive = boost::archive::binary_iarchive;
+using oarchive = boost::archive::binary_oarchive;
+
+#define SERIALIZE_IMPL(A)                                                                          \
+    template void A::serialize<iarchive>(iarchive & ar, const unsigned int file_version);          \
+    template void A::serialize<oarchive>(oarchive & ar, const unsigned int file_version);
+
+#define SERIALIZE_EXPORT_IMPL(A)                                                                   \
+    BOOST_CLASS_EXPORT_IMPLEMENT(A)                                                                \
+    BOOST_SERIALIZATION_REGISTER_ARCHIVE(iarchive)                                                 \
+    BOOST_SERIALIZATION_REGISTER_ARCHIVE(oarchive)

src/common/common_paths.h

@@ -47,6 +47,7 @@
 #define DUMP_DIR "dump"
 #define LOAD_DIR "load"
 #define SHADER_DIR "shaders"
+#define STATES_DIR "states"
 
 // Filenames
 // Files in the directory returned by GetUserPath(UserPath::LogDir)

src/common/construct.h

@@ -0,0 +1,34 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/serialization/serialization.hpp>
+
+/// Allows classes to define `save_construct` and `load_construct` methods for serialization
+/// This is used where we don't call the default constructor during deserialization, as a shortcut
+/// instead of using load_construct_data directly
+class construct_access {
+public:
+    template <class Archive, class T>
+    static void save_construct(Archive& ar, const T* t, const unsigned int file_version) {
+        t->save_construct(ar, file_version);
+    }
+    template <class Archive, class T>
+    static void load_construct(Archive& ar, T* t, const unsigned int file_version) {
+        T::load_construct(ar, t, file_version);
+    }
+};
+
+#define BOOST_SERIALIZATION_CONSTRUCT(T)                                                           \
+    namespace boost::serialization {                                                               \
+    template <class Archive>                                                                       \
+    void save_construct_data(Archive& ar, const T* t, const unsigned int file_version) {           \
+        construct_access::save_construct(ar, t, file_version);                                     \
+    }                                                                                              \
+    template <class Archive>                                                                       \
+    void load_construct_data(Archive& ar, T* t, const unsigned int file_version) {                 \
+        construct_access::load_construct(ar, t, file_version);                                     \
+    }                                                                                              \
+    }

src/common/file_util.cpp

@@ -726,6 +726,34 @@ void SetUserPath(const std::string& path) {
     g_paths.emplace(UserPath::ShaderDir, user_path + SHADER_DIR DIR_SEP);
     g_paths.emplace(UserPath::DumpDir, user_path + DUMP_DIR DIR_SEP);
     g_paths.emplace(UserPath::LoadDir, user_path + LOAD_DIR DIR_SEP);
+    g_paths.emplace(UserPath::StatesDir, user_path + STATES_DIR DIR_SEP);
+}
+
+std::string g_currentRomPath{};
+
+void SetCurrentRomPath(const std::string& path) {
+    g_currentRomPath = path;
+}
+
+bool StringReplace(std::string& haystack, const std::string& a, const std::string& b, bool swap) {
+    const auto& needle = swap ? b : a;
+    const auto& replacement = swap ? a : b;
+    if (needle.empty()) {
+        return false;
+    }
+    auto index = haystack.find(needle, 0);
+    if (index == std::string::npos) {
+        return false;
+    }
+    haystack.replace(index, needle.size(), replacement);
+    return true;
+}
+
+std::string SerializePath(const std::string& input, bool is_saving) {
+    auto result = input;
+    StringReplace(result, "%CITRA_ROM_FILE%", g_currentRomPath, is_saving);
+    StringReplace(result, "%CITRA_USER_DIR%", GetUserPath(UserPath::UserDir), is_saving);
+    return result;
 }
 
 const std::string& GetUserPath(UserPath path) {
@@ -882,8 +910,9 @@ std::string SanitizePath(std::string_view path_, DirectorySeparator directory_se
 
 IOFile::IOFile() {}
 
-IOFile::IOFile(const std::string& filename, const char openmode[], int flags) {
+IOFile::IOFile(const std::string& filename, const char openmode[], int flags)
-    Open(filename, openmode, flags);
+    : filename(filename), openmode(openmode), flags(flags) {
+    Open();
 }
 
 IOFile::~IOFile() {
@@ -902,10 +931,14 @@ IOFile& IOFile::operator=(IOFile&& other) noexcept {
 void IOFile::Swap(IOFile& other) noexcept {
     std::swap(m_file, other.m_file);
     std::swap(m_good, other.m_good);
+    std::swap(filename, other.filename);
+    std::swap(openmode, other.openmode);
+    std::swap(flags, other.flags);
 }
 
-bool IOFile::Open(const std::string& filename, const char openmode[], int flags) {
+bool IOFile::Open() {
     Close();
+
 #ifdef _WIN32
     if (flags != 0) {
         m_file = _wfsopen(Common::UTF8ToUTF16W(filename).c_str(),
@@ -916,7 +949,7 @@ bool IOFile::Open(const std::string& filename, const char openmode[], int flags)
                            Common::UTF8ToUTF16W(openmode).c_str()) == 0;
     }
 #else
-    m_file = std::fopen(filename.c_str(), openmode);
+    m_file = std::fopen(filename.c_str(), openmode.c_str());
     m_good = m_file != nullptr;
 #endif
 

src/common/file_util.h

@@ -14,6 +14,9 @@
 #include <string_view>
 #include <type_traits>
 #include <vector>
+#include <boost/serialization/split_member.hpp>
+#include <boost/serialization/string.hpp>
+#include <boost/serialization/wrapper.hpp>
 #include "common/common_types.h"
 #ifdef _MSC_VER
 #include "common/string_util.h"
@@ -34,10 +37,39 @@ enum class UserPath {
     RootDir,
     SDMCDir,
     ShaderDir,
+    StatesDir,
     SysDataDir,
     UserDir,
 };
 
+// Replaces install-specific paths with standard placeholders, and back again
+std::string SerializePath(const std::string& input, bool is_saving);
+
+// A serializable path string
+struct Path : public boost::serialization::wrapper_traits<const Path> {
+    std::string& str;
+
+    explicit Path(std::string& _str) : str(_str) {}
+
+    static const Path make(std::string& str) {
+        return Path(str);
+    }
+
+    template <class Archive>
+    void save(Archive& ar, const unsigned int) const {
+        auto s_path = SerializePath(str, true);
+        ar << s_path;
+    }
+    template <class Archive>
+    void load(Archive& ar, const unsigned int) const {
+        ar >> str;
+        str = SerializePath(str, false);
+    }
+
+    BOOST_SERIALIZATION_SPLIT_MEMBER();
+    friend class boost::serialization::access;
+};
+
 // FileSystem tree node/
 struct FSTEntry {
     bool isDirectory;
@@ -45,6 +77,17 @@ struct FSTEntry {
     std::string physicalName; // name on disk
     std::string virtualName;  // name in FST names table
     std::vector<FSTEntry> children;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& isDirectory;
+        ar& size;
+        ar& Path::make(physicalName);
+        ar& Path::make(virtualName);
+        ar& children;
+    }
+    friend class boost::serialization::access;
 };
 
 // Returns true if file filename exists
@@ -137,6 +180,8 @@ bool SetCurrentDir(const std::string& directory);
 
 void SetUserPath(const std::string& path = "");
 
+void SetCurrentRomPath(const std::string& path);
+
 // Returns a pointer to a string with a Citra data dir in the user's home
 // directory. To be used in "multi-user" mode (that is, installed).
 const std::string& GetUserPath(UserPath path);
@@ -221,7 +266,6 @@ public:
 
     void Swap(IOFile& other) noexcept;
 
-    bool Open(const std::string& filename, const char openmode[], int flags = 0);
     bool Close();
 
     template <typename T>
@@ -305,8 +349,31 @@ public:
     }
 
 private:
+    bool Open();
+
     std::FILE* m_file = nullptr;
     bool m_good = true;
+
+    std::string filename;
+    std::string openmode;
+    u32 flags;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& Path::make(filename);
+        ar& openmode;
+        ar& flags;
+        u64 pos;
+        if (Archive::is_saving::value) {
+            pos = Tell();
+        }
+        ar& pos;
+        if (Archive::is_loading::value) {
+            Open();
+            Seek(pos, SEEK_SET);
+        }
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileUtil

src/common/memory_ref.cpp

@@ -0,0 +1,8 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/archives.h"
+#include "common/memory_ref.h"
+
+SERIALIZE_EXPORT_IMPL(BufferMem)

src/common/memory_ref.h

@@ -0,0 +1,136 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <vector>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/vector.hpp>
+#include "common/assert.h"
+#include "common/common_types.h"
+
+/// Abstract host-side memory - for example a static buffer, or local vector
+class BackingMem {
+public:
+    virtual ~BackingMem() = default;
+    virtual u8* GetPtr() = 0;
+    virtual const u8* GetPtr() const = 0;
+    virtual std::size_t GetSize() const = 0;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {}
+    friend class boost::serialization::access;
+};
+
+/// Backing memory implemented by a local buffer
+class BufferMem : public BackingMem {
+public:
+    BufferMem() = default;
+    explicit BufferMem(std::size_t size) : data(size) {}
+
+    u8* GetPtr() override {
+        return data.data();
+    }
+
+    const u8* GetPtr() const override {
+        return data.data();
+    }
+
+    std::size_t GetSize() const override {
+        return data.size();
+    }
+
+    std::vector<u8>& Vector() {
+        return data;
+    }
+
+    const std::vector<u8>& Vector() const {
+        return data;
+    }
+
+private:
+    std::vector<u8> data;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<BackingMem>(*this);
+        ar& data;
+    }
+    friend class boost::serialization::access;
+};
+
+BOOST_CLASS_EXPORT_KEY(BufferMem);
+
+/// A managed reference to host-side memory. Fast enough to be used everywhere instead of u8*
+/// Supports serialization.
+class MemoryRef {
+public:
+    MemoryRef() = default;
+    MemoryRef(std::nullptr_t) {}
+    MemoryRef(std::shared_ptr<BackingMem> backing_mem_)
+        : backing_mem(std::move(backing_mem_)), offset(0) {
+        Init();
+    }
+    MemoryRef(std::shared_ptr<BackingMem> backing_mem_, u64 offset_)
+        : backing_mem(std::move(backing_mem_)), offset(offset_) {
+        ASSERT(offset < backing_mem->GetSize());
+        Init();
+    }
+    explicit operator bool() const {
+        return cptr != nullptr;
+    }
+    operator u8*() {
+        return cptr;
+    }
+    u8* GetPtr() {
+        return cptr;
+    }
+    operator const u8*() const {
+        return cptr;
+    }
+    const u8* GetPtr() const {
+        return cptr;
+    }
+    std::size_t GetSize() const {
+        return csize;
+    }
+    MemoryRef& operator+=(u32 offset_by) {
+        ASSERT(offset_by < csize);
+        offset += offset_by;
+        Init();
+        return *this;
+    }
+    MemoryRef operator+(u32 offset_by) const {
+        ASSERT(offset_by < csize);
+        return MemoryRef(backing_mem, offset + offset_by);
+    }
+
+private:
+    std::shared_ptr<BackingMem> backing_mem{};
+    u64 offset{};
+    // Cached values for speed
+    u8* cptr{};
+    std::size_t csize{};
+
+    void Init() {
+        if (backing_mem) {
+            cptr = backing_mem->GetPtr() + offset;
+            csize = static_cast<std::size_t>(backing_mem->GetSize() - offset);
+        } else {
+            cptr = nullptr;
+            csize = 0;
+        }
+    }
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& backing_mem;
+        ar& offset;
+        Init();
+    }
+    friend class boost::serialization::access;
+};

src/common/serialization/atomic.h

@@ -0,0 +1,29 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <boost/serialization/split_free.hpp>
+
+namespace boost::serialization {
+
+template <class Archive, class T>
+void serialize(Archive& ar, std::atomic<T>& value, const unsigned int file_version) {
+    boost::serialization::split_free(ar, value, file_version);
+}
+
+template <class Archive, class T>
+void save(Archive& ar, const std::atomic<T>& value, const unsigned int file_version) {
+    ar << value.load();
+}
+
+template <class Archive, class T>
+void load(Archive& ar, std::atomic<T>& value, const unsigned int file_version) {
+    T tmp;
+    ar >> tmp;
+    value.store(tmp);
+}
+
+} // namespace boost::serialization

src/common/serialization/boost_discrete_interval.hpp

@@ -0,0 +1,38 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/icl/discrete_interval.hpp>
+#include "common/common_types.h"
+#include "common/logging/log.h"
+
+namespace boost::serialization {
+
+template <class Archive, class DomainT, ICL_COMPARE Compare>
+void save(Archive& ar, const boost::icl::discrete_interval<DomainT, Compare>& obj,
+          const unsigned int file_version) {
+    ar << obj.lower();
+    ar << obj.upper();
+    ar << obj.bounds()._bits;
+}
+
+template <class Archive, class DomainT, ICL_COMPARE Compare>
+void load(Archive& ar, boost::icl::discrete_interval<DomainT, Compare>& obj,
+          const unsigned int file_version) {
+    DomainT upper, lower;
+    boost::icl::bound_type bounds;
+    ar >> lower;
+    ar >> upper;
+    ar >> bounds;
+    obj = boost::icl::discrete_interval(lower, upper, boost::icl::interval_bounds(bounds));
+}
+
+template <class Archive, class DomainT, ICL_COMPARE Compare>
+void serialize(Archive& ar, boost::icl::discrete_interval<DomainT, Compare>& obj,
+               const unsigned int file_version) {
+    boost::serialization::split_free(ar, obj, file_version);
+}
+
+} // namespace boost::serialization

src/common/serialization/boost_flat_set.h

@@ -0,0 +1,38 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/container/flat_set.hpp>
+#include <boost/serialization/split_free.hpp>
+#include "common/common_types.h"
+
+namespace boost::serialization {
+
+template <class Archive, class T>
+void save(Archive& ar, const boost::container::flat_set<T>& set, const unsigned int file_version) {
+    ar << static_cast<u64>(set.size());
+    for (auto& v : set) {
+        ar << v;
+    }
+}
+
+template <class Archive, class T>
+void load(Archive& ar, boost::container::flat_set<T>& set, const unsigned int file_version) {
+    u64 count{};
+    ar >> count;
+    set.clear();
+    for (u64 i = 0; i < count; i++) {
+        T value{};
+        ar >> value;
+        set.insert(value);
+    }
+}
+
+template <class Archive, class T>
+void serialize(Archive& ar, boost::container::flat_set<T>& set, const unsigned int file_version) {
+    boost::serialization::split_free(ar, set, file_version);
+}
+
+} // namespace boost::serialization

src/common/serialization/boost_interval_set.hpp

@@ -0,0 +1,38 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <boost/icl/interval_set.hpp>
+#include <boost/serialization/split_free.hpp>
+#include "common/serialization/boost_discrete_interval.hpp"
+
+namespace boost::serialization {
+
+template <class Archive, class T>
+void save(Archive& ar, const boost::icl::interval_set<T>& set, const unsigned int file_version) {
+    ar << static_cast<u64>(set.iterative_size());
+    for (auto& v : set) {
+        ar << v;
+    }
+}
+
+template <class Archive, class T>
+void load(Archive& ar, boost::icl::interval_set<T>& set, const unsigned int file_version) {
+    u64 count{};
+    ar >> count;
+    set.clear();
+    for (u64 i = 0; i < count; i++) {
+        typename boost::icl::interval_set<T>::interval_type value{};
+        ar >> value;
+        set += value;
+    }
+}
+
+template <class Archive, class T>
+void serialize(Archive& ar, boost::icl::interval_set<T>& set, const unsigned int file_version) {
+    boost::serialization::split_free(ar, set, file_version);
+}
+
+} // namespace boost::serialization

src/common/serialization/boost_small_vector.hpp

@@ -0,0 +1,144 @@
+#ifndef BOOST_SERIALIZATION_BOOST_SMALL_VECTOR_HPP
+#define BOOST_SERIALIZATION_BOOST_SMALL_VECTOR_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// boost_vector.hpp: serialization for boost vector templates
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
+// fast array serialization (C) Copyright 2005 Matthias Troyer
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for updates, documentation, and revision history.
+
+#include <boost/container/small_vector.hpp>
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+
+#include <boost/archive/detail/basic_iarchive.hpp>
+#include <boost/serialization/access.hpp>
+#include <boost/serialization/collection_size_type.hpp>
+#include <boost/serialization/item_version_type.hpp>
+#include <boost/serialization/nvp.hpp>
+
+#include <boost/mpl/bool_fwd.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/serialization/array_wrapper.hpp>
+#include <boost/serialization/collections_load_imp.hpp>
+#include <boost/serialization/collections_save_imp.hpp>
+#include <boost/serialization/split_free.hpp>
+
+// default is being compatible with version 1.34.1 files, not 1.35 files
+#ifndef BOOST_SERIALIZATION_VECTOR_VERSIONED
+#define BOOST_SERIALIZATION_VECTOR_VERSIONED(V) (V == 4 || V == 5)
+#endif
+
+namespace boost {
+namespace serialization {
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// vector< T >
+
+// the default versions
+
+template <class Archive, class U, std::size_t N>
+inline void save(Archive& ar, const boost::container::small_vector<U, N>& t,
+                 const unsigned int /* file_version */, mpl::false_) {
+    boost::serialization::stl::save_collection<Archive, boost::container::small_vector<U, N>>(ar,
+                                                                                              t);
+}
+
+template <class Archive, class U, std::size_t N>
+inline void load(Archive& ar, boost::container::small_vector<U, N>& t,
+                 const unsigned int /* file_version */, mpl::false_) {
+    const boost::archive::library_version_type library_version(ar.get_library_version());
+    // retrieve number of elements
+    item_version_type item_version(0);
+    collection_size_type count;
+    ar >> BOOST_SERIALIZATION_NVP(count);
+    if (boost::archive::library_version_type(3) < library_version) {
+        ar >> BOOST_SERIALIZATION_NVP(item_version);
+    }
+    t.reserve(count);
+    stl::collection_load_impl(ar, t, count, item_version);
+}
+
+// the optimized versions
+
+template <class Archive, class U, std::size_t N>
+inline void save(Archive& ar, const boost::container::small_vector<U, N>& t,
+                 const unsigned int /* file_version */, mpl::true_) {
+    const collection_size_type count(t.size());
+    ar << BOOST_SERIALIZATION_NVP(count);
+    if (!t.empty())
+        // explict template arguments to pass intel C++ compiler
+        ar << serialization::make_array<const U, collection_size_type>(static_cast<const U*>(&t[0]),
+                                                                       count);
+}
+
+template <class Archive, class U, std::size_t N>
+inline void load(Archive& ar, boost::container::small_vector<U, N>& t,
+                 const unsigned int /* file_version */, mpl::true_) {
+    collection_size_type count(t.size());
+    ar >> BOOST_SERIALIZATION_NVP(count);
+    t.resize(count);
+    unsigned int item_version = 0;
+    if (BOOST_SERIALIZATION_VECTOR_VERSIONED(ar.get_library_version())) {
+        ar >> BOOST_SERIALIZATION_NVP(item_version);
+    }
+    if (!t.empty())
+        // explict template arguments to pass intel C++ compiler
+        ar >> serialization::make_array<U, collection_size_type>(static_cast<U*>(&t[0]), count);
+}
+
+// dispatch to either default or optimized versions
+
+template <class Archive, class U, std::size_t N>
+inline void save(Archive& ar, const boost::container::small_vector<U, N>& t,
+                 const unsigned int file_version) {
+    typedef typename boost::serialization::use_array_optimization<Archive>::template apply<
+        typename remove_const<U>::type>::type use_optimized;
+    save(ar, t, file_version, use_optimized());
+}
+
+template <class Archive, class U, std::size_t N>
+inline void load(Archive& ar, boost::container::small_vector<U, N>& t,
+                 const unsigned int file_version) {
+#ifdef BOOST_SERIALIZATION_VECTOR_135_HPP
+    if (ar.get_library_version() == boost::archive::library_version_type(5)) {
+        load(ar, t, file_version, boost::is_arithmetic<U>());
+        return;
+    }
+#endif
+    typedef typename boost::serialization::use_array_optimization<Archive>::template apply<
+        typename remove_const<U>::type>::type use_optimized;
+    load(ar, t, file_version, use_optimized());
+}
+
+// split non-intrusive serialization function member into separate
+// non intrusive save/load member functions
+template <class Archive, class U, std::size_t N>
+inline void serialize(Archive& ar, boost::container::small_vector<U, N>& t,
+                      const unsigned int file_version) {
+    boost::serialization::split_free(ar, t, file_version);
+}
+
+// split non-intrusive serialization function member into separate
+// non intrusive save/load member functions
+template <class Archive, std::size_t N>
+inline void serialize(Archive& ar, boost::container::small_vector<bool, N>& t,
+                      const unsigned int file_version) {
+    boost::serialization::split_free(ar, t, file_version);
+}
+
+} // namespace serialization
+} // namespace boost
+
+#endif // BOOST_SERIALIZATION_BOOST_SMALL_VECTOR_HPP

src/common/serialization/boost_vector.hpp

@@ -0,0 +1,149 @@
+#ifndef BOOST_SERIALIZATION_BOOST_VECTOR_HPP
+#define BOOST_SERIALIZATION_BOOST_VECTOR_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// boost_vector.hpp: serialization for boost vector templates
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com .
+// fast array serialization (C) Copyright 2005 Matthias Troyer
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+//  See http://www.boost.org for updates, documentation, and revision history.
+
+#include <boost/container/vector.hpp>
+
+#include <boost/config.hpp>
+#include <boost/detail/workaround.hpp>
+
+#include <boost/archive/detail/basic_iarchive.hpp>
+#include <boost/serialization/access.hpp>
+#include <boost/serialization/collection_size_type.hpp>
+#include <boost/serialization/item_version_type.hpp>
+#include <boost/serialization/nvp.hpp>
+
+#include <boost/mpl/bool_fwd.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/serialization/array_wrapper.hpp>
+#include <boost/serialization/collections_load_imp.hpp>
+#include <boost/serialization/collections_save_imp.hpp>
+#include <boost/serialization/split_free.hpp>
+
+// default is being compatible with version 1.34.1 files, not 1.35 files
+#ifndef BOOST_SERIALIZATION_VECTOR_VERSIONED
+#define BOOST_SERIALIZATION_VECTOR_VERSIONED(V) (V == 4 || V == 5)
+#endif
+
+namespace boost {
+namespace serialization {
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// vector< T >
+
+// the default versions
+
+template <class Archive, class U, class Allocator, class Options>
+inline void save(Archive& ar, const boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int /* file_version */, mpl::false_) {
+    boost::serialization::stl::save_collection<Archive,
+                                               boost::container::vector<U, Allocator, Options>>(ar,
+                                                                                                t);
+}
+
+template <class Archive, class U, class Allocator, class Options>
+inline void load(Archive& ar, boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int /* file_version */, mpl::false_) {
+    const boost::archive::library_version_type library_version(ar.get_library_version());
+    // retrieve number of elements
+    item_version_type item_version(0);
+    collection_size_type count;
+    ar >> BOOST_SERIALIZATION_NVP(count);
+    if (boost::archive::library_version_type(3) < library_version) {
+        ar >> BOOST_SERIALIZATION_NVP(item_version);
+    }
+    t.reserve(count);
+    stl::collection_load_impl(ar, t, count, item_version);
+}
+
+// the optimized versions
+
+template <class Archive, class U, class Allocator, class Options>
+inline void save(Archive& ar, const boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int /* file_version */, mpl::true_) {
+    const collection_size_type count(t.size());
+    ar << BOOST_SERIALIZATION_NVP(count);
+    if (!t.empty())
+        // explict template arguments to pass intel C++ compiler
+        ar << serialization::make_array<const U, collection_size_type>(static_cast<const U*>(&t[0]),
+                                                                       count);
+}
+
+template <class Archive, class U, class Allocator, class Options>
+inline void load(Archive& ar, boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int /* file_version */, mpl::true_) {
+    collection_size_type count(t.size());
+    ar >> BOOST_SERIALIZATION_NVP(count);
+    t.resize(count);
+    unsigned int item_version = 0;
+    if (BOOST_SERIALIZATION_VECTOR_VERSIONED(ar.get_library_version())) {
+        ar >> BOOST_SERIALIZATION_NVP(item_version);
+    }
+    if (!t.empty())
+        // explict template arguments to pass intel C++ compiler
+        ar >> serialization::make_array<U, collection_size_type>(static_cast<U*>(&t[0]), count);
+}
+
+// dispatch to either default or optimized versions
+
+template <class Archive, class U, class Allocator, class Options>
+inline void save(Archive& ar, const boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int file_version) {
+    typedef typename boost::serialization::use_array_optimization<Archive>::template apply<
+        typename remove_const<U>::type>::type use_optimized;
+    save(ar, t, file_version, use_optimized());
+}
+
+template <class Archive, class U, class Allocator, class Options>
+inline void load(Archive& ar, boost::container::vector<U, Allocator, Options>& t,
+                 const unsigned int file_version) {
+#ifdef BOOST_SERIALIZATION_VECTOR_135_HPP
+    if (ar.get_library_version() == boost::archive::library_version_type(5)) {
+        load(ar, t, file_version, boost::is_arithmetic<U>());
+        return;
+    }
+#endif
+    typedef typename boost::serialization::use_array_optimization<Archive>::template apply<
+        typename remove_const<U>::type>::type use_optimized;
+    load(ar, t, file_version, use_optimized());
+}
+
+// split non-intrusive serialization function member into separate
+// non intrusive save/load member functions
+template <class Archive, class U, class Allocator, class Options>
+inline void serialize(Archive& ar, boost::container::vector<U, Allocator, Options>& t,
+                      const unsigned int file_version) {
+    boost::serialization::split_free(ar, t, file_version);
+}
+
+// split non-intrusive serialization function member into separate
+// non intrusive save/load member functions
+template <class Archive, class Allocator, class Options>
+inline void serialize(Archive& ar, boost::container::vector<bool, Allocator, Options>& t,
+                      const unsigned int file_version) {
+    boost::serialization::split_free(ar, t, file_version);
+}
+
+} // namespace serialization
+} // namespace boost
+
+#include <boost/serialization/collection_traits.hpp>
+
+BOOST_SERIALIZATION_COLLECTION_TRAITS(boost::container::vector)
+
+#endif // BOOST_SERIALIZATION_BOOST_VECTOR_HPP

src/common/thread_queue_list.h

@@ -7,6 +7,9 @@
 #include <algorithm>
 #include <array>
 #include <deque>
+#include <boost/serialization/deque.hpp>
+#include <boost/serialization/split_member.hpp>
+#include "common/common_types.h"
 
 namespace Common {
 
@@ -157,6 +160,52 @@ private:
     Queue* first;
     // The priority level queues of thread ids.
     std::array<Queue, NUM_QUEUES> queues;
+
+    s64 ToIndex(const Queue* q) const {
+        if (q == nullptr) {
+            return -2;
+        } else if (q == UnlinkedTag()) {
+            return -1;
+        } else {
+            return q - queues.data();
+        }
+    }
+
+    Queue* ToPointer(s64 idx) {
+        if (idx == -1) {
+            return UnlinkedTag();
+        } else if (idx < 0) {
+            return nullptr;
+        } else {
+            return &queues[idx];
+        }
+    }
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void save(Archive& ar, const unsigned int file_version) const {
+        const s64 idx = ToIndex(first);
+        ar << idx;
+        for (std::size_t i = 0; i < NUM_QUEUES; i++) {
+            const s64 idx1 = ToIndex(queues[i].next_nonempty);
+            ar << idx1;
+            ar << queues[i].data;
+        }
+    }
+
+    template <class Archive>
+    void load(Archive& ar, const unsigned int file_version) {
+        s64 idx;
+        ar >> idx;
+        first = ToPointer(idx);
+        for (std::size_t i = 0; i < NUM_QUEUES; i++) {
+            ar >> idx;
+            queues[i].next_nonempty = ToPointer(idx);
+            ar >> queues[i].data;
+        }
+    }
+
+    BOOST_SERIALIZATION_SPLIT_MEMBER()
 };
 
 } // namespace Common

src/common/vector_math.h

@@ -32,6 +32,7 @@
 
 #include <cmath>
 #include <type_traits>
+#include <boost/serialization/access.hpp>
 
 namespace Common {
 
@@ -44,6 +45,13 @@ class Vec4;
 
 template <typename T>
 class Vec2 {
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& x;
+        ar& y;
+    }
+
 public:
     T x;
     T y;
@@ -191,6 +199,14 @@ inline float Vec2<float>::Normalize() {
 
 template <typename T>
 class Vec3 {
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& x;
+        ar& y;
+        ar& z;
+    }
+
 public:
     T x;
     T y;
@@ -399,6 +415,15 @@ using Vec3f = Vec3<float>;
 
 template <typename T>
 class Vec4 {
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& x;
+        ar& y;
+        ar& z;
+        ar& w;
+    }
+
 public:
     T x;
     T y;

src/core/CMakeLists.txt

@@ -164,6 +164,7 @@ add_library(core STATIC
     hle/kernel/server_session.cpp
     hle/kernel/server_session.h
     hle/kernel/session.h
+    hle/kernel/session.cpp
     hle/kernel/shared_memory.cpp
     hle/kernel/shared_memory.h
     hle/kernel/shared_page.cpp
@@ -450,6 +451,8 @@ add_library(core STATIC
     rpc/server.h
     rpc/udp_server.cpp
     rpc/udp_server.h
+    savestate.cpp
+    savestate.h
     settings.cpp
     settings.h
     telemetry_session.cpp
@@ -469,7 +472,7 @@ endif()
 create_target_directory_groups(core)
 
 target_link_libraries(core PUBLIC common PRIVATE audio_core network video_core)
-target_link_libraries(core PUBLIC Boost::boost PRIVATE cryptopp fmt open_source_archives)
+target_link_libraries(core PUBLIC Boost::boost PRIVATE cryptopp fmt open_source_archives Boost::serialization)
 
 if (ENABLE_WEB_SERVICE)
     get_directory_property(OPENSSL_LIBS

src/core/arm/arm_interface.h

@@ -6,10 +6,14 @@
 
 #include <cstddef>
 #include <memory>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/split_member.hpp>
+#include <boost/serialization/version.hpp>
 #include "common/common_types.h"
 #include "core/arm/skyeye_common/arm_regformat.h"
 #include "core/arm/skyeye_common/vfp/asm_vfp.h"
 #include "core/core_timing.h"
+#include "core/memory.h"
 
 namespace Memory {
 struct PageTable;
@@ -23,6 +27,48 @@ public:
     virtual ~ARM_Interface() {}
 
     class ThreadContext {
+        friend class boost::serialization::access;
+
+        template <class Archive>
+        void save(Archive& ar, const unsigned int file_version) const {
+            for (std::size_t i = 0; i < 16; i++) {
+                const auto r = GetCpuRegister(i);
+                ar << r;
+            }
+            std::size_t fpu_reg_count = file_version == 0 ? 16 : 64;
+            for (std::size_t i = 0; i < fpu_reg_count; i++) {
+                const auto r = GetFpuRegister(i);
+                ar << r;
+            }
+            const auto r1 = GetCpsr();
+            ar << r1;
+            const auto r2 = GetFpscr();
+            ar << r2;
+            const auto r3 = GetFpexc();
+            ar << r3;
+        }
+
+        template <class Archive>
+        void load(Archive& ar, const unsigned int file_version) {
+            u32 r;
+            for (std::size_t i = 0; i < 16; i++) {
+                ar >> r;
+                SetCpuRegister(i, r);
+            }
+            std::size_t fpu_reg_count = file_version == 0 ? 16 : 64;
+            for (std::size_t i = 0; i < fpu_reg_count; i++) {
+                ar >> r;
+                SetFpuRegister(i, r);
+            }
+            ar >> r;
+            SetCpsr(r);
+            ar >> r;
+            SetFpscr(r);
+            ar >> r;
+            SetFpexc(r);
+        }
+
+        BOOST_SERIALIZATION_SPLIT_MEMBER()
     public:
         virtual ~ThreadContext() = default;
 
@@ -77,7 +123,7 @@ public:
     virtual void InvalidateCacheRange(u32 start_address, std::size_t length) = 0;
 
     /// Notify CPU emulation that page tables have changed
-    virtual void PageTableChanged(Memory::PageTable* new_page_table) = 0;
+    virtual void SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) = 0;
 
     /**
      * Set the Program Counter to an address
@@ -150,7 +196,7 @@ public:
      * @param reg The CP15 register to retrieve the value from.
      * @return the value stored in the given CP15 register.
      */
-    virtual u32 GetCP15Register(CP15Register reg) = 0;
+    virtual u32 GetCP15Register(CP15Register reg) const = 0;
 
     /**
      * Stores the given value into the indicated CP15 register.
@@ -180,6 +226,8 @@ public:
     /// Prepare core for thread reschedule (if needed to correctly handle state)
     virtual void PrepareReschedule() = 0;
 
+    virtual void PurgeState() = 0;
+
     std::shared_ptr<Core::Timing::Timer> GetTimer() {
         return timer;
     }
@@ -189,8 +237,101 @@ public:
     }
 
 protected:
+    // This us used for serialization. Returning nullptr is valid if page tables are not used.
+    virtual std::shared_ptr<Memory::PageTable> GetPageTable() const = 0;
+
     std::shared_ptr<Core::Timing::Timer> timer;
 
 private:
     u32 id;
+
+    friend class boost::serialization::access;
+
+    template <class Archive>
+    void save(Archive& ar, const unsigned int file_version) const {
+        ar << timer;
+        ar << id;
+        const auto page_table = GetPageTable();
+        ar << page_table;
+        for (int i = 0; i < 15; i++) {
+            const auto r = GetReg(i);
+            ar << r;
+        }
+        const auto pc = GetPC();
+        ar << pc;
+        const auto cpsr = GetCPSR();
+        ar << cpsr;
+        int vfp_reg_count = file_version == 0 ? 32 : 64;
+        for (int i = 0; i < vfp_reg_count; i++) {
+            const auto r = GetVFPReg(i);
+            ar << r;
+        }
+        for (std::size_t i = 0; i < VFPSystemRegister::VFP_SYSTEM_REGISTER_COUNT; i++) {
+            const auto reg = static_cast<VFPSystemRegister>(i);
+            u32 r = 0;
+            switch (reg) {
+            case VFP_FPSCR:
+            case VFP_FPEXC:
+                r = GetVFPSystemReg(reg);
+            }
+            ar << r;
+        }
+        for (std::size_t i = 0; i < CP15Register::CP15_REGISTER_COUNT; i++) {
+            const auto reg = static_cast<CP15Register>(i);
+            u32 r = 0;
+            switch (reg) {
+            case CP15_THREAD_UPRW:
+            case CP15_THREAD_URO:
+                r = GetCP15Register(reg);
+            }
+            ar << r;
+        }
+    }
+
+    template <class Archive>
+    void load(Archive& ar, const unsigned int file_version) {
+        PurgeState();
+        ar >> timer;
+        ar >> id;
+        std::shared_ptr<Memory::PageTable> page_table{};
+        ar >> page_table;
+        SetPageTable(page_table);
+        u32 r;
+        for (int i = 0; i < 15; i++) {
+            ar >> r;
+            SetReg(i, r);
+        }
+        ar >> r;
+        SetPC(r);
+        ar >> r;
+        SetCPSR(r);
+        int vfp_reg_count = file_version == 0 ? 32 : 64;
+        for (int i = 0; i < vfp_reg_count; i++) {
+            ar >> r;
+            SetVFPReg(i, r);
+        }
+        for (std::size_t i = 0; i < VFPSystemRegister::VFP_SYSTEM_REGISTER_COUNT; i++) {
+            ar >> r;
+            const auto reg = static_cast<VFPSystemRegister>(i);
+            switch (reg) {
+            case VFP_FPSCR:
+            case VFP_FPEXC:
+                SetVFPSystemReg(reg, r);
+            }
+        }
+        for (std::size_t i = 0; i < CP15Register::CP15_REGISTER_COUNT; i++) {
+            ar >> r;
+            const auto reg = static_cast<CP15Register>(i);
+            switch (reg) {
+            case CP15_THREAD_UPRW:
+            case CP15_THREAD_URO:
+                SetCP15Register(reg, r);
+            }
+        }
+    }
+
+    BOOST_SERIALIZATION_SPLIT_MEMBER()
 };
+
+BOOST_CLASS_VERSION(ARM_Interface, 1)
+BOOST_CLASS_VERSION(ARM_Interface::ThreadContext, 1)

src/core/arm/dynarmic/arm_dynarmic.cpp

@@ -153,7 +153,7 @@ ARM_Dynarmic::ARM_Dynarmic(Core::System* system, Memory::MemorySystem& memory, u
                            std::shared_ptr<Core::Timing::Timer> timer)
     : ARM_Interface(id, timer), system(*system), memory(memory),
       cb(std::make_unique<DynarmicUserCallbacks>(*this)) {
-    PageTableChanged(memory.GetCurrentPageTable());
+    SetPageTable(memory.GetCurrentPageTable());
 }
 
 ARM_Dynarmic::~ARM_Dynarmic() = default;
@@ -229,7 +229,7 @@ void ARM_Dynarmic::SetCPSR(u32 cpsr) {
     jit->SetCpsr(cpsr);
 }
 
-u32 ARM_Dynarmic::GetCP15Register(CP15Register reg) {
+u32 ARM_Dynarmic::GetCP15Register(CP15Register reg) const {
     switch (reg) {
     case CP15_THREAD_UPRW:
         return cp15_state.cp15_thread_uprw;
@@ -287,17 +287,27 @@ void ARM_Dynarmic::InvalidateCacheRange(u32 start_address, std::size_t length) {
     jit->InvalidateCacheRange(start_address, length);
 }
 
-void ARM_Dynarmic::PageTableChanged(Memory::PageTable* new_page_table) {
+std::shared_ptr<Memory::PageTable> ARM_Dynarmic::GetPageTable() const {
-    current_page_table = new_page_table;
+    return current_page_table;
+}
+
+void ARM_Dynarmic::SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) {
+    current_page_table = page_table;
+    Dynarmic::A32::Context ctx{};
+    if (jit) {
+        jit->SaveContext(ctx);
+    }
 
     auto iter = jits.find(current_page_table);
     if (iter != jits.end()) {
         jit = iter->second.get();
+        jit->LoadContext(ctx);
         return;
     }
 
     auto new_jit = MakeJit();
     jit = new_jit.get();
+    jit->LoadContext(ctx);
     jits.emplace(current_page_table, std::move(new_jit));
 }
 
@@ -311,8 +321,12 @@ void ARM_Dynarmic::ServeBreak() {
 std::unique_ptr<Dynarmic::A32::Jit> ARM_Dynarmic::MakeJit() {
     Dynarmic::A32::UserConfig config;
     config.callbacks = cb.get();
-    config.page_table = &current_page_table->pointers;
+    config.page_table = &current_page_table->GetPointerArray();
     config.coprocessors[15] = std::make_shared<DynarmicCP15>(cp15_state);
     config.define_unpredictable_behaviour = true;
     return std::make_unique<Dynarmic::A32::Jit>(config);
 }
+
+void ARM_Dynarmic::PurgeState() {
+    ClearInstructionCache();
+}

src/core/arm/dynarmic/arm_dynarmic.h

@@ -41,7 +41,7 @@ public:
     void SetVFPSystemReg(VFPSystemRegister reg, u32 value) override;
     u32 GetCPSR() const override;
     void SetCPSR(u32 cpsr) override;
-    u32 GetCP15Register(CP15Register reg) override;
+    u32 GetCP15Register(CP15Register reg) const override;
     void SetCP15Register(CP15Register reg, u32 value) override;
 
     std::unique_ptr<ThreadContext> NewContext() const override;
@@ -52,7 +52,11 @@ public:
 
     void ClearInstructionCache() override;
     void InvalidateCacheRange(u32 start_address, std::size_t length) override;
-    void PageTableChanged(Memory::PageTable* new_page_table) override;
+    void SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) override;
+    void PurgeState() override;
+
+protected:
+    std::shared_ptr<Memory::PageTable> GetPageTable() const override;
 
 private:
     void ServeBreak();
@@ -67,6 +71,6 @@ private:
     CP15State cp15_state;
 
     Dynarmic::A32::Jit* jit = nullptr;
-    Memory::PageTable* current_page_table = nullptr;
+    std::shared_ptr<Memory::PageTable> current_page_table = nullptr;
-    std::map<Memory::PageTable*, std::unique_ptr<Dynarmic::A32::Jit>> jits;
+    std::map<std::shared_ptr<Memory::PageTable>, std::unique_ptr<Dynarmic::A32::Jit>> jits;
 };

src/core/arm/dyncom/arm_dyncom.cpp

@@ -95,10 +95,16 @@ void ARM_DynCom::InvalidateCacheRange(u32, std::size_t) {
     ClearInstructionCache();
 }
 
-void ARM_DynCom::PageTableChanged(Memory::PageTable*) {
+void ARM_DynCom::SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) {
     ClearInstructionCache();
 }
 
+std::shared_ptr<Memory::PageTable> ARM_DynCom::GetPageTable() const {
+    return nullptr;
+}
+
+void ARM_DynCom::PurgeState() {}
+
 void ARM_DynCom::SetPC(u32 pc) {
     state->Reg[15] = pc;
 }
@@ -139,7 +145,7 @@ void ARM_DynCom::SetCPSR(u32 cpsr) {
     state->Cpsr = cpsr;
 }
 
-u32 ARM_DynCom::GetCP15Register(CP15Register reg) {
+u32 ARM_DynCom::GetCP15Register(CP15Register reg) const {
     return state->CP15[reg];
 }
 

src/core/arm/dyncom/arm_dyncom.h

@@ -30,7 +30,6 @@ public:
 
     void ClearInstructionCache() override;
     void InvalidateCacheRange(u32 start_address, std::size_t length) override;
-    void PageTableChanged(Memory::PageTable* new_page_table) override;
 
     void SetPC(u32 pc) override;
     u32 GetPC() const override;
@@ -42,14 +41,19 @@ public:
     void SetVFPSystemReg(VFPSystemRegister reg, u32 value) override;
     u32 GetCPSR() const override;
     void SetCPSR(u32 cpsr) override;
-    u32 GetCP15Register(CP15Register reg) override;
+    u32 GetCP15Register(CP15Register reg) const override;
     void SetCP15Register(CP15Register reg, u32 value) override;
 
     std::unique_ptr<ThreadContext> NewContext() const override;
     void SaveContext(const std::unique_ptr<ThreadContext>& arg) override;
     void LoadContext(const std::unique_ptr<ThreadContext>& arg) override;
 
+    void SetPageTable(const std::shared_ptr<Memory::PageTable>& page_table) override;
     void PrepareReschedule() override;
+    void PurgeState() override;
+
+protected:
+    std::shared_ptr<Memory::PageTable> GetPageTable() const override;
 
 private:
     void ExecuteInstructions(u64 num_instructions);

src/core/cheats/cheats.cpp

@@ -18,6 +18,10 @@ constexpr u64 run_interval_ticks = BASE_CLOCK_RATE_ARM11 / 60;
 
 CheatEngine::CheatEngine(Core::System& system_) : system(system_) {
     LoadCheatFile();
+    Connect();
+}
+
+void CheatEngine::Connect() {
     event = system.CoreTiming().RegisterEvent(
         "CheatCore::run_event",
         [this](u64 thread_id, s64 cycle_late) { RunCallback(thread_id, cycle_late); });

src/core/cheats/cheats.h

@@ -26,6 +26,7 @@ class CheatEngine {
 public:
     explicit CheatEngine(Core::System& system);
     ~CheatEngine();
+    void Connect();
     std::vector<std::shared_ptr<CheatBase>> GetCheats() const;
     void AddCheat(const std::shared_ptr<CheatBase>& cheat);
     void RemoveCheat(int index);

src/core/core.cpp

@@ -2,8 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <fstream>
 #include <memory>
+#include <stdexcept>
 #include <utility>
+#include <boost/serialization/array.hpp>
 #include "audio_core/dsp_interface.h"
 #include "audio_core/hle/hle.h"
 #include "audio_core/lle/lle.h"
@@ -23,25 +26,48 @@
 #endif
 #include "core/custom_tex_cache.h"
 #include "core/gdbstub/gdbstub.h"
+#include "core/global.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/service/fs/archive.h"
+#include "core/hle/service/gsp/gsp.h"
+#include "core/hle/service/pm/pm_app.h"
 #include "core/hle/service/service.h"
 #include "core/hle/service/sm/sm.h"
+#include "core/hw/gpu.h"
 #include "core/hw/hw.h"
+#include "core/hw/lcd.h"
 #include "core/loader/loader.h"
 #include "core/movie.h"
 #include "core/rpc/rpc_server.h"
 #include "core/settings.h"
 #include "network/network.h"
+#include "video_core/renderer_base.h"
 #include "video_core/video_core.h"
 
 namespace Core {
 
 /*static*/ System System::s_instance;
 
+template <>
+Core::System& Global() {
+    return System::GetInstance();
+}
+
+template <>
+Kernel::KernelSystem& Global() {
+    return System::GetInstance().Kernel();
+}
+
+template <>
+Core::Timing& Global() {
+    return System::GetInstance().CoreTiming();
+}
+
+System::~System() = default;
+
 System::ResultStatus System::RunLoop(bool tight_loop) {
     status = ResultStatus::Success;
     if (std::any_of(cpu_cores.begin(), cpu_cores.end(),
@@ -67,6 +93,52 @@ System::ResultStatus System::RunLoop(bool tight_loop) {
         }
     }
 
+    Signal signal{Signal::None};
+    u32 param{};
+    {
+        std::lock_guard lock{signal_mutex};
+        if (current_signal != Signal::None) {
+            signal = current_signal;
+            param = signal_param;
+            current_signal = Signal::None;
+        }
+    }
+    switch (signal) {
+    case Signal::Reset:
+        Reset();
+        return ResultStatus::Success;
+    case Signal::Shutdown:
+        return ResultStatus::ShutdownRequested;
+    case Signal::Load: {
+        LOG_INFO(Core, "Begin load");
+        try {
+            System::LoadState(param);
+            LOG_INFO(Core, "Load completed");
+        } catch (const std::exception& e) {
+            LOG_ERROR(Core, "Error loading: {}", e.what());
+            status_details = e.what();
+            return ResultStatus::ErrorSavestate;
+        }
+        frame_limiter.WaitOnce();
+        return ResultStatus::Success;
+    }
+    case Signal::Save: {
+        LOG_INFO(Core, "Begin save");
+        try {
+            System::SaveState(param);
+            LOG_INFO(Core, "Save completed");
+        } catch (const std::exception& e) {
+            LOG_ERROR(Core, "Error saving: {}", e.what());
+            status_details = e.what();
+            return ResultStatus::ErrorSavestate;
+        }
+        frame_limiter.WaitOnce();
+        return ResultStatus::Success;
+    }
+    default:
+        break;
+    }
+
     // All cores should have executed the same amount of ticks. If this is not the case an event was
     // scheduled with a cycles_into_future smaller then the current downcount.
     // So we have to get those cores to the same global time first
@@ -141,20 +213,26 @@ System::ResultStatus System::RunLoop(bool tight_loop) {
     HW::Update();
     Reschedule();
 
-    if (reset_requested.exchange(false)) {
-        Reset();
-    } else if (shutdown_requested.exchange(false)) {
-        return ResultStatus::ShutdownRequested;
-    }
-
     return status;
 }
 
+bool System::SendSignal(System::Signal signal, u32 param) {
+    std::lock_guard lock{signal_mutex};
+    if (current_signal != signal && current_signal != Signal::None) {
+        LOG_ERROR(Core, "Unable to {} as {} is ongoing", signal, current_signal);
+        return false;
+    }
+    current_signal = signal;
+    signal_param = param;
+    return true;
+}
+
 System::ResultStatus System::SingleStep() {
     return RunLoop(false);
 }
 
 System::ResultStatus System::Load(Frontend::EmuWindow& emu_window, const std::string& filepath) {
+    FileUtil::SetCurrentRomPath(filepath);
     app_loader = Loader::GetLoader(filepath);
     if (!app_loader) {
         LOG_CRITICAL(Core, "Failed to obtain loader for {}!", filepath);
@@ -180,7 +258,11 @@ System::ResultStatus System::Load(Frontend::EmuWindow& emu_window, const std::st
     ASSERT(system_mode.first);
     auto n3ds_mode = app_loader->LoadKernelN3dsMode();
     ASSERT(n3ds_mode.first);
-    ResultStatus init_result{Init(emu_window, *system_mode.first, *n3ds_mode.first)};
+    u32 num_cores = 2;
+    if (Settings::values.is_new_3ds) {
+        num_cores = 4;
+    }
+    ResultStatus init_result{Init(emu_window, *system_mode.first, *n3ds_mode.first, num_cores)};
     if (init_result != ResultStatus::Success) {
         LOG_CRITICAL(Core, "Failed to initialize system (Error {})!",
                      static_cast<u32>(init_result));
@@ -206,7 +288,7 @@ System::ResultStatus System::Load(Frontend::EmuWindow& emu_window, const std::st
         }
     }
     cheat_engine = std::make_unique<Cheats::CheatEngine>(*this);
-    u64 title_id{0};
+    title_id = 0;
     if (app_loader->ReadProgramId(title_id) != Loader::ResultStatus::Success) {
         LOG_ERROR(Core, "Failed to find title id for ROM (Error {})",
                   static_cast<u32>(load_result));
@@ -237,7 +319,8 @@ void System::PrepareReschedule() {
 }
 
 PerfStats::Results System::GetAndResetPerfStats() {
-    return perf_stats->GetAndResetStats(timing->GetGlobalTimeUs());
+    return (perf_stats && timing) ? perf_stats->GetAndResetStats(timing->GetGlobalTimeUs())
+                                  : PerfStats::Results{};
 }
 
 void System::Reschedule() {
@@ -252,14 +335,10 @@ void System::Reschedule() {
     }
 }
 
-System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mode, u8 n3ds_mode) {
+System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mode, u8 n3ds_mode,
+                                  u32 num_cores) {
     LOG_DEBUG(HW_Memory, "initialized OK");
 
-    std::size_t num_cores = 2;
-    if (Settings::values.is_new_3ds) {
-        num_cores = 4;
-    }
-
     memory = std::make_unique<Memory::MemorySystem>();
 
     timing = std::make_unique<Timing>(num_cores, Settings::values.cpu_clock_percentage);
@@ -269,19 +348,19 @@ System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mo
 
     if (Settings::values.use_cpu_jit) {
 #ifdef ARCHITECTURE_x86_64
-        for (std::size_t i = 0; i < num_cores; ++i) {
+        for (u32 i = 0; i < num_cores; ++i) {
             cpu_cores.push_back(
                 std::make_shared<ARM_Dynarmic>(this, *memory, i, timing->GetTimer(i)));
         }
 #else
-        for (std::size_t i = 0; i < num_cores; ++i) {
+        for (u32 i = 0; i < num_cores; ++i) {
             cpu_cores.push_back(
                 std::make_shared<ARM_DynCom>(this, *memory, USER32MODE, i, timing->GetTimer(i)));
         }
         LOG_WARNING(Core, "CPU JIT requested, but Dynarmic not available");
 #endif
     } else {
-        for (std::size_t i = 0; i < num_cores; ++i) {
+        for (u32 i = 0; i < num_cores; ++i) {
             cpu_cores.push_back(
                 std::make_shared<ARM_DynCom>(this, *memory, USER32MODE, i, timing->GetTimer(i)));
         }
@@ -307,7 +386,7 @@ System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mo
 
     rpc_server = std::make_unique<RPC::RPCServer>();
 
-    service_manager = std::make_shared<Service::SM::ServiceManager>(*this);
+    service_manager = std::make_unique<Service::SM::ServiceManager>(*this);
     archive_manager = std::make_unique<Service::FS::ArchiveManager>(*this);
 
     HW::Init(*memory);
@@ -419,7 +498,7 @@ void System::RegisterImageInterface(std::shared_ptr<Frontend::ImageInterface> im
     registered_image_interface = std::move(image_interface);
 }
 
-void System::Shutdown() {
+void System::Shutdown(bool is_deserializing) {
     // Log last frame performance stats
     const auto perf_results = GetAndResetPerfStats();
     telemetry_session->AddField(Telemetry::FieldType::Performance, "Shutdown_EmulationSpeed",
@@ -432,20 +511,22 @@ void System::Shutdown() {
                                 perf_stats->GetMeanFrametime());
 
     // Shutdown emulation session
-    GDBStub::Shutdown();
     VideoCore::Shutdown();
     HW::Shutdown();
+    if (!is_deserializing) {
+        GDBStub::Shutdown();
+        perf_stats.reset();
+        cheat_engine.reset();
+        app_loader.reset();
+    }
     telemetry_session.reset();
-    perf_stats.reset();
     rpc_server.reset();
-    cheat_engine.reset();
     archive_manager.reset();
     service_manager.reset();
     dsp_core.reset();
     cpu_cores.clear();
     kernel.reset();
     timing.reset();
-    app_loader.reset();
 
     if (video_dumper->IsDumping()) {
         video_dumper->StopDumping();
@@ -469,4 +550,63 @@ void System::Reset() {
     Load(*m_emu_window, m_filepath);
 }
 
+template <class Archive>
+void System::serialize(Archive& ar, const unsigned int file_version) {
+
+    u32 num_cores;
+    if (Archive::is_saving::value) {
+        num_cores = this->GetNumCores();
+    }
+    ar& num_cores;
+
+    if (Archive::is_loading::value) {
+        // When loading, we want to make sure any lingering state gets cleared out before we begin.
+        // Shutdown, but persist a few things between loads...
+        Shutdown(true);
+
+        // Re-initialize everything like it was before
+        auto system_mode = this->app_loader->LoadKernelSystemMode();
+        auto n3ds_mode = this->app_loader->LoadKernelN3dsMode();
+        Init(*m_emu_window, *system_mode.first, *n3ds_mode.first, num_cores);
+    }
+
+    // flush on save, don't flush on load
+    bool should_flush = !Archive::is_loading::value;
+    Memory::RasterizerClearAll(should_flush);
+    ar&* timing.get();
+    for (u32 i = 0; i < num_cores; i++) {
+        ar&* cpu_cores[i].get();
+    }
+    ar&* service_manager.get();
+    ar&* archive_manager.get();
+    ar& GPU::g_regs;
+    ar& LCD::g_regs;
+
+    // NOTE: DSP doesn't like being destroyed and recreated. So instead we do an inline
+    // serialization; this means that the DSP Settings need to match for loading to work.
+    auto dsp_hle = dynamic_cast<AudioCore::DspHle*>(dsp_core.get());
+    if (dsp_hle) {
+        ar&* dsp_hle;
+    } else {
+        throw std::runtime_error("LLE audio not supported for save states");
+    }
+
+    ar&* memory.get();
+    ar&* kernel.get();
+    VideoCore::serialize(ar, file_version);
+    if (file_version >= 1) {
+        ar& Movie::GetInstance();
+    }
+
+    // This needs to be set from somewhere - might as well be here!
+    if (Archive::is_loading::value) {
+        Service::GSP::SetGlobalModule(*this);
+        memory->SetDSP(*dsp_core);
+        cheat_engine->Connect();
+        VideoCore::g_renderer->Sync();
+    }
+}
+
+SERIALIZE_IMPL(System)
+
 } // namespace Core

src/core/core.h

@@ -5,7 +5,9 @@
 #pragma once
 
 #include <memory>
+#include <mutex>
 #include <string>
+#include <boost/serialization/version.hpp>
 #include "common/common_types.h"
 #include "core/custom_tex_cache.h"
 #include "core/frontend/applets/mii_selector.h"
@@ -87,10 +89,13 @@ public:
                                             /// generic drivers installed
         ErrorVideoCore_ErrorBelowGL33,      ///< Error in the video core due to the user not having
                                             /// OpenGL 3.3 or higher
+        ErrorSavestate,                     ///< Error saving or loading
         ShutdownRequested,                  ///< Emulated program requested a system shutdown
         ErrorUnknown                        ///< Any other error
     };
 
+    ~System();
+
     /**
      * Run the core CPU loop
      * This function runs the core for the specified number of CPU instructions before trying to
@@ -110,19 +115,23 @@ public:
     ResultStatus SingleStep();
 
     /// Shutdown the emulated system.
-    void Shutdown();
+    void Shutdown(bool is_deserializing = false);
 
     /// Shutdown and then load again
     void Reset();
 
+    enum class Signal : u32 { None, Shutdown, Reset, Save, Load };
+
+    bool SendSignal(Signal signal, u32 param = 0);
+
     /// Request reset of the system
     void RequestReset() {
-        reset_requested = true;
+        SendSignal(Signal::Reset);
     }
 
     /// Request shutdown of the system
     void RequestShutdown() {
-        shutdown_requested = true;
+        SendSignal(Signal::Shutdown);
     }
 
     /**
@@ -179,7 +188,7 @@ public:
     };
 
     u32 GetNumCores() const {
-        return cpu_cores.size();
+        return static_cast<u32>(cpu_cores.size());
     }
 
     void InvalidateCacheRange(u32 start_address, std::size_t length) {
@@ -295,6 +304,10 @@ public:
         return registered_image_interface;
     }
 
+    void SaveState(u32 slot) const;
+
+    void LoadState(u32 slot);
+
 private:
     /**
      * Initialize the emulated system.
@@ -303,7 +316,8 @@ private:
      * @param system_mode The system mode.
      * @return ResultStatus code, indicating if the operation succeeded.
      */
-    ResultStatus Init(Frontend::EmuWindow& emu_window, u32 system_mode, u8 n3ds_mode);
+    ResultStatus Init(Frontend::EmuWindow& emu_window, u32 system_mode, u8 n3ds_mode,
+                      u32 num_cores);
 
     /// Reschedule the core emulation
     void Reschedule();
@@ -325,7 +339,7 @@ private:
     std::unique_ptr<Core::TelemetrySession> telemetry_session;
 
     /// Service manager
-    std::shared_ptr<Service::SM::ServiceManager> service_manager;
+    std::unique_ptr<Service::SM::ServiceManager> service_manager;
 
     /// Frontend applets
     std::shared_ptr<Frontend::MiiSelector> registered_mii_selector;
@@ -362,9 +376,15 @@ private:
     /// Saved variables for reset
     Frontend::EmuWindow* m_emu_window;
     std::string m_filepath;
+    u64 title_id;
 
-    std::atomic<bool> reset_requested;
+    std::mutex signal_mutex;
-    std::atomic<bool> shutdown_requested;
+    Signal current_signal;
+    u32 signal_param;
+
+    friend class boost::serialization::access;
+    template <typename Archive>
+    void serialize(Archive& ar, const unsigned int file_version);
 };
 
 inline ARM_Interface& GetRunningCore() {
@@ -384,3 +404,5 @@ inline AudioCore::DspInterface& DSP() {
 }
 
 } // namespace Core
+
+BOOST_CLASS_VERSION(Core::System, 1)

src/core/core_timing.cpp

@@ -23,8 +23,9 @@ bool Timing::Event::operator<(const Timing::Event& right) const {
 Timing::Timing(std::size_t num_cores, u32 cpu_clock_percentage) {
     timers.resize(num_cores);
     for (std::size_t i = 0; i < num_cores; ++i) {
-        timers[i] = std::make_shared<Timer>(100.0 / cpu_clock_percentage);
+        timers[i] = std::make_shared<Timer>();
     }
+    UpdateClockSpeed(cpu_clock_percentage);
     current_timer = timers[0];
 }
 
@@ -37,14 +38,12 @@ void Timing::UpdateClockSpeed(u32 cpu_clock_percentage) {
 TimingEventType* Timing::RegisterEvent(const std::string& name, TimedCallback callback) {
     // check for existing type with same name.
     // we want event type names to remain unique so that we can use them for serialization.
-    ASSERT_MSG(event_types.find(name) == event_types.end(),
+    auto info = event_types.emplace(name, TimingEventType{});
-               "CoreTiming Event \"{}\" is already registered. Events should only be registered "
-               "during Init to avoid breaking save states.",
-               name);
-
-    auto info = event_types.emplace(name, TimingEventType{callback, nullptr});
     TimingEventType* event_type = &info.first->second;
     event_type->name = &info.first->first;
+    if (callback != nullptr) {
+        event_type->callback = callback;
+    }
     return event_type;
 }
 
@@ -123,7 +122,7 @@ std::shared_ptr<Timing::Timer> Timing::GetTimer(std::size_t cpu_id) {
     return timers[cpu_id];
 }
 
-Timing::Timer::Timer(double cpu_clock_scale_) : cpu_clock_scale(cpu_clock_scale_) {}
+Timing::Timer::Timer() = default;
 
 Timing::Timer::~Timer() {
     MoveEvents();
@@ -184,7 +183,11 @@ void Timing::Timer::Advance(s64 max_slice_length) {
         Event evt = std::move(event_queue.front());
         std::pop_heap(event_queue.begin(), event_queue.end(), std::greater<>());
         event_queue.pop_back();
-        evt.type->callback(evt.userdata, executed_ticks - evt.time);
+        if (evt.type->callback != nullptr) {
+            evt.type->callback(evt.userdata, executed_ticks - evt.time);
+        } else {
+            LOG_ERROR(Core, "Event '{}' has no callback", *evt.type->name);
+        }
     }
 
     is_timer_sane = false;

src/core/core_timing.h

@@ -23,9 +23,12 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <boost/serialization/split_member.hpp>
+#include <boost/serialization/vector.hpp>
 #include "common/common_types.h"
 #include "common/logging/log.h"
 #include "common/threadsafe_queue.h"
+#include "core/global.h"
 
 // The timing we get from the assembly is 268,111,855.956 Hz
 // It is possible that this number isn't just an integer because the compiler could have
@@ -133,6 +136,7 @@ struct TimingEventType {
 };
 
 class Timing {
+
 public:
     struct Event {
         s64 time;
@@ -142,13 +146,36 @@ public:
 
         bool operator>(const Event& right) const;
         bool operator<(const Event& right) const;
+
+    private:
+        template <class Archive>
+        void save(Archive& ar, const unsigned int) const {
+            ar& time;
+            ar& fifo_order;
+            ar& userdata;
+            std::string name = *(type->name);
+            ar << name;
+        }
+
+        template <class Archive>
+        void load(Archive& ar, const unsigned int) {
+            ar& time;
+            ar& fifo_order;
+            ar& userdata;
+            std::string name;
+            ar >> name;
+            type = Global<Timing>().RegisterEvent(name, nullptr);
+        }
+        friend class boost::serialization::access;
+
+        BOOST_SERIALIZATION_SPLIT_MEMBER()
     };
 
     static constexpr int MAX_SLICE_LENGTH = 20000;
 
     class Timer {
     public:
-        Timer(double cpu_clock_scale);
+        Timer();
         ~Timer();
 
         s64 GetMaxSliceLength() const;
@@ -195,6 +222,19 @@ public:
         // Stores a scaling for the internal clockspeed. Changing this number results in
         // under/overclocking the guest cpu
         double cpu_clock_scale = 1.0;
+
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int) {
+            MoveEvents();
+            // NOTE: ts_queue should be empty now
+            ar& event_queue;
+            ar& event_fifo_id;
+            ar& slice_length;
+            ar& downcount;
+            ar& executed_ticks;
+            ar& idled_cycles;
+        }
+        friend class boost::serialization::access;
     };
 
     explicit Timing(std::size_t num_cores, u32 cpu_clock_percentage);
@@ -246,6 +286,15 @@ private:
     // Stores a scaling for the internal clockspeed. Changing this number results in
     // under/overclocking the guest cpu
     double cpu_clock_scale = 1.0;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        // event_types set during initialization of other things
+        ar& global_timer;
+        ar& timers;
+        ar& current_timer;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace Core

src/core/file_sys/archive_backend.h

@@ -8,6 +8,8 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <boost/serialization/string.hpp>
+#include <boost/serialization/vector.hpp>
 #include "common/bit_field.h"
 #include "common/common_types.h"
 #include "common/swap.h"
@@ -64,6 +66,32 @@ private:
     std::vector<u8> binary;
     std::string string;
     std::u16string u16str;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& type;
+        switch (type) {
+        case LowPathType::Binary:
+            ar& binary;
+            break;
+        case LowPathType::Char:
+            ar& string;
+            break;
+        case LowPathType::Wchar: {
+            std::vector<char16_t> data;
+            if (Archive::is_saving::value) {
+                std::copy(u16str.begin(), u16str.end(), std::back_inserter(data));
+            }
+            ar& data;
+            if (Archive::is_loading::value) {
+                u16str = std::u16string(data.data(), data.size());
+            }
+        } break;
+        default:
+            break;
+        }
+    }
+    friend class boost::serialization::access;
 };
 
 /// Parameters of the archive, as specified in the Create or Format call.
@@ -169,6 +197,13 @@ public:
 
 protected:
     std::unique_ptr<DelayGenerator> delay_generator;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& delay_generator;
+    }
+    friend class boost::serialization::access;
 };
 
 class ArchiveFactory : NonCopyable {
@@ -205,6 +240,10 @@ public:
      * @return Format information about the archive or error code
      */
     virtual ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const = 0;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {}
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys

src/core/file_sys/archive_extsavedata.cpp

@@ -6,6 +6,7 @@
 #include <memory>
 #include <vector>
 #include <fmt/format.h>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
@@ -19,6 +20,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_ExtSaveData)
+
 namespace FileSys {
 
 /**
@@ -77,6 +80,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(3085068);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 /**
@@ -162,6 +167,14 @@ public:
         }
         return SaveDataArchive::CreateFile(path, size);
     }
+
+private:
+    ExtSaveDataArchive() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<SaveDataArchive>(*this);
+    }
+    friend class boost::serialization::access;
 };
 
 struct ExtSaveDataArchivePath {
@@ -297,3 +310,6 @@ void ArchiveFactory_ExtSaveData::WriteIcon(const Path& path, const u8* icon_data
 }
 
 } // namespace FileSys
+
+SERIALIZE_EXPORT_IMPL(FileSys::ExtSaveDataDelayGenerator)
+SERIALIZE_EXPORT_IMPL(FileSys::ExtSaveDataArchive)

src/core/file_sys/archive_extsavedata.h

@@ -6,6 +6,8 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/file_sys/archive_backend.h"
 #include "core/hle/result.h"
@@ -54,6 +56,15 @@ private:
 
     /// Returns a path with the correct SaveIdHigh value for Shared extdata paths.
     Path GetCorrectedPath(const Path& path);
+
+    ArchiveFactory_ExtSaveData() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& shared;
+        ar& mount_point;
+    }
+    friend class boost::serialization::access;
 };
 
 /**
@@ -93,4 +104,9 @@ std::string GetExtDataContainerPath(const std::string& mount_point, bool shared)
  */
 Path ConstructExtDataBinaryPath(u32 media_type, u32 high, u32 low);
 
+class ExtSaveDataDelayGenerator;
+
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_ExtSaveData)
+BOOST_CLASS_EXPORT_KEY(FileSys::ExtSaveDataDelayGenerator)

src/core/file_sys/archive_ncch.cpp

@@ -8,6 +8,7 @@
 #include <utility>
 #include <vector>
 #include "bad_word_list.app.romfs.h"
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
@@ -28,6 +29,10 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::NCCHArchive)
+SERIALIZE_EXPORT_IMPL(FileSys::NCCHFile)
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_NCCH)
+
 namespace FileSys {
 
 struct NCCHArchivePath {

src/core/file_sys/archive_ncch.h

@@ -7,6 +7,9 @@
 #include <array>
 #include <memory>
 #include <string>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/vector.hpp>
 #include "core/file_sys/archive_backend.h"
 #include "core/file_sys/file_backend.h"
 #include "core/hle/result.h"
@@ -63,6 +66,17 @@ public:
 protected:
     u64 title_id;
     Service::FS::MediaType media_type;
+
+private:
+    NCCHArchive() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveBackend>(*this);
+        ar& title_id;
+        ar& media_type;
+    }
+    friend class boost::serialization::access;
 };
 
 // File backend for NCCH files
@@ -82,6 +96,15 @@ public:
 
 private:
     std::vector<u8> file_buffer;
+
+    NCCHFile() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<FileBackend>(*this);
+        ar& file_buffer;
+    }
+    friend class boost::serialization::access;
 };
 
 /// File system interface to the NCCH archive
@@ -97,6 +120,17 @@ public:
     ResultCode Format(const Path& path, const FileSys::ArchiveFormatInfo& format_info,
                       u64 program_id) override;
     ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::NCCHArchive)
+BOOST_CLASS_EXPORT_KEY(FileSys::NCCHFile)
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_NCCH)

src/core/file_sys/archive_other_savedata.cpp

@@ -4,6 +4,7 @@
 
 #include <tuple>
 #include <utility>
+#include "common/archives.h"
 #include "core/file_sys/archive_other_savedata.h"
 #include "core/file_sys/errors.h"
 #include "core/hle/kernel/process.h"
@@ -12,6 +13,9 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_OtherSaveDataPermitted)
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_OtherSaveDataGeneral)
+
 namespace FileSys {
 
 // TODO(wwylele): The storage info in exheader should be checked before accessing these archives

src/core/file_sys/archive_other_savedata.h

@@ -4,6 +4,9 @@
 
 #pragma once
 
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
 #include "core/file_sys/archive_source_sd_savedata.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -27,8 +30,15 @@ public:
     ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
-    std::string mount_point;
     std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata_source;
+
+    ArchiveFactory_OtherSaveDataPermitted() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& sd_savedata_source;
+    }
+    friend class boost::serialization::access;
 };
 
 /// File system interface to the OtherSaveDataGeneral archive
@@ -47,8 +57,18 @@ public:
     ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
-    std::string mount_point;
     std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata_source;
+
+    ArchiveFactory_OtherSaveDataGeneral() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& sd_savedata_source;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_OtherSaveDataPermitted)
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_OtherSaveDataGeneral)

src/core/file_sys/archive_savedata.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <utility>
+#include "common/archives.h"
 #include "core/core.h"
 #include "core/file_sys/archive_savedata.h"
 #include "core/hle/kernel/process.h"
@@ -10,6 +11,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SaveData)
+
 namespace FileSys {
 
 ArchiveFactory_SaveData::ArchiveFactory_SaveData(

src/core/file_sys/archive_savedata.h

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/shared_ptr.hpp>
 #include "core/file_sys/archive_source_sd_savedata.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
@@ -27,8 +29,17 @@ public:
     ResultVal<ArchiveFormatInfo> GetFormatInfo(const Path& path, u64 program_id) const override;
 
 private:
-    std::string mount_point;
     std::shared_ptr<ArchiveSource_SDSaveData> sd_savedata_source;
+
+    ArchiveFactory_SaveData() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& sd_savedata_source;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_SaveData)

src/core/file_sys/archive_sdmc.cpp

@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <memory>
+#include "common/archives.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "core/file_sys/archive_sdmc.h"
@@ -15,6 +16,9 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::SDMCArchive)
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SDMC)
+
 namespace FileSys {
 
 class SDMCDelayGenerator : public DelayGenerator {
@@ -37,6 +41,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(269082);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 ResultVal<std::unique_ptr<FileBackend>> SDMCArchive::OpenFile(const Path& path,
@@ -405,3 +411,5 @@ ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMC::GetFormatInfo(const Path& path
     return ResultCode(-1);
 }
 } // namespace FileSys
+
+SERIALIZE_EXPORT_IMPL(FileSys::SDMCDelayGenerator)

src/core/file_sys/archive_sdmc.h

@@ -6,6 +6,9 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/string.hpp>
 #include "core/file_sys/archive_backend.h"
 #include "core/hle/result.h"
 
@@ -42,6 +45,14 @@ public:
 protected:
     ResultVal<std::unique_ptr<FileBackend>> OpenFileBase(const Path& path, const Mode& mode) const;
     std::string mount_point;
+
+    SDMCArchive() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveBackend>(*this);
+        ar& mount_point;
+    }
+    friend class boost::serialization::access;
 };
 
 /// File system interface to the SDMC archive
@@ -66,6 +77,20 @@ public:
 
 private:
     std::string sdmc_directory;
+
+    ArchiveFactory_SDMC() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& sdmc_directory;
+    }
+    friend class boost::serialization::access;
 };
 
+class SDMCDelayGenerator;
+
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::SDMCArchive)
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_SDMC)
+BOOST_CLASS_EXPORT_KEY(FileSys::SDMCDelayGenerator)

src/core/file_sys/archive_sdmcwriteonly.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <memory>
+#include "common/archives.h"
 #include "common/file_util.h"
 #include "core/file_sys/archive_sdmcwriteonly.h"
 #include "core/file_sys/directory_backend.h"
@@ -13,6 +14,9 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::SDMCWriteOnlyArchive)
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SDMCWriteOnly)
+
 namespace FileSys {
 
 class SDMCWriteOnlyDelayGenerator : public DelayGenerator {
@@ -35,6 +39,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(269082);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 ResultVal<std::unique_ptr<FileBackend>> SDMCWriteOnlyArchive::OpenFile(const Path& path,
@@ -96,3 +102,5 @@ ResultVal<ArchiveFormatInfo> ArchiveFactory_SDMCWriteOnly::GetFormatInfo(const P
 }
 
 } // namespace FileSys
+
+SERIALIZE_EXPORT_IMPL(FileSys::SDMCWriteOnlyDelayGenerator)

src/core/file_sys/archive_sdmcwriteonly.h

@@ -31,6 +31,14 @@ public:
                                                      const Mode& mode) const override;
 
     ResultVal<std::unique_ptr<DirectoryBackend>> OpenDirectory(const Path& path) const override;
+
+private:
+    SDMCWriteOnlyArchive() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<SDMCArchive>(*this);
+    }
+    friend class boost::serialization::access;
 };
 
 /// File system interface to the SDMC write-only archive
@@ -55,6 +63,20 @@ public:
 
 private:
     std::string sdmc_directory;
+
+    ArchiveFactory_SDMCWriteOnly() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& sdmc_directory;
+    }
+    friend class boost::serialization::access;
 };
 
+class SDMCWriteOnlyDelayGenerator;
+
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::SDMCWriteOnlyArchive)
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_SDMCWriteOnly)
+BOOST_CLASS_EXPORT_KEY(FileSys::SDMCWriteOnlyDelayGenerator)

src/core/file_sys/archive_selfncch.cpp

@@ -4,6 +4,7 @@
 
 #include <array>
 #include <cinttypes>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/logging/log.h"
 #include "common/swap.h"
@@ -16,6 +17,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SelfNCCH)
+
 namespace FileSys {
 
 enum class SelfNCCHFilePathType : u32 {
@@ -74,6 +77,15 @@ public:
 
 private:
     std::shared_ptr<std::vector<u8>> data;
+
+    ExeFSSectionFile() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<FileBackend>(*this);
+        ar& data;
+    }
+    friend class boost::serialization::access;
 };
 
 // SelfNCCHArchive represents the running application itself. From this archive the application can
@@ -231,6 +243,15 @@ private:
     }
 
     NCCHData ncch_data;
+
+    SelfNCCHArchive() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveBackend>(*this);
+        ar& ncch_data;
+    }
+    friend class boost::serialization::access;
 };
 
 void ArchiveFactory_SelfNCCH::Register(Loader::AppLoader& app_loader) {
@@ -297,3 +318,6 @@ ResultVal<ArchiveFormatInfo> ArchiveFactory_SelfNCCH::GetFormatInfo(const Path&,
 }
 
 } // namespace FileSys
+
+SERIALIZE_EXPORT_IMPL(FileSys::ExeFSSectionFile)
+SERIALIZE_EXPORT_IMPL(FileSys::SelfNCCHArchive)

src/core/file_sys/archive_selfncch.h

@@ -8,6 +8,10 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/unordered_map.hpp>
+#include <boost/serialization/vector.hpp>
 #include "common/common_types.h"
 #include "core/file_sys/archive_backend.h"
 #include "core/hle/result.h"
@@ -24,6 +28,17 @@ struct NCCHData {
     std::shared_ptr<std::vector<u8>> banner;
     std::shared_ptr<RomFSReader> romfs_file;
     std::shared_ptr<RomFSReader> update_romfs_file;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& icon;
+        ar& logo;
+        ar& banner;
+        ar& romfs_file;
+        ar& update_romfs_file;
+    }
+    friend class boost::serialization::access;
 };
 
 /// File system interface to the SelfNCCH archive
@@ -45,6 +60,20 @@ public:
 private:
     /// Mapping of ProgramId -> NCCHData
     std::unordered_map<u64, NCCHData> ncch_data;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& ncch_data;
+    }
+    friend class boost::serialization::access;
 };
 
+class ExeFSSectionFile;
+class SelfNCCHArchive;
+
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_SelfNCCH)
+BOOST_CLASS_EXPORT_KEY(FileSys::ExeFSSectionFile)
+BOOST_CLASS_EXPORT_KEY(FileSys::SelfNCCHArchive)

src/core/file_sys/archive_source_sd_savedata.cpp

@@ -3,6 +3,7 @@
 // Refer to the license.txt file included.
 
 #include <fmt/format.h>
+#include "common/archives.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "core/file_sys/archive_source_sd_savedata.h"
@@ -13,6 +14,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveSource_SDSaveData)
+
 namespace FileSys {
 
 namespace {

src/core/file_sys/archive_source_sd_savedata.h

@@ -6,6 +6,8 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/string.hpp>
 #include "core/file_sys/archive_backend.h"
 #include "core/hle/result.h"
 
@@ -27,6 +29,15 @@ public:
 
 private:
     std::string mount_point;
+
+    ArchiveSource_SDSaveData() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& mount_point;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveSource_SDSaveData)

src/core/file_sys/archive_systemsavedata.cpp

@@ -7,6 +7,7 @@
 #include <memory>
 #include <vector>
 #include <fmt/format.h>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "core/file_sys/archive_systemsavedata.h"
@@ -17,6 +18,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::ArchiveFactory_SystemSaveData)
+
 namespace FileSys {
 
 std::string GetSystemSaveDataPath(const std::string& mount_point, const Path& path) {

src/core/file_sys/archive_systemsavedata.h

@@ -6,6 +6,8 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/file_sys/archive_backend.h"
 #include "core/hle/result.h"
@@ -31,6 +33,14 @@ public:
 
 private:
     std::string base_path;
+
+    ArchiveFactory_SystemSaveData() = default;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveFactory>(*this);
+        ar& base_path;
+    }
+    friend class boost::serialization::access;
 };
 
 /**
@@ -60,3 +70,5 @@ std::string GetSystemSaveDataContainerPath(const std::string& mount_point);
 Path ConstructSystemSaveDataBinaryPath(u32 high, u32 low);
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::ArchiveFactory_SystemSaveData)

src/core/file_sys/delay_generator.cpp

@@ -3,8 +3,11 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
+#include "common/archives.h"
 #include "core/file_sys/delay_generator.h"
 
+SERIALIZE_EXPORT_IMPL(FileSys::DefaultDelayGenerator)
+
 namespace FileSys {
 
 DelayGenerator::~DelayGenerator() = default;

src/core/file_sys/delay_generator.h

@@ -5,8 +5,18 @@
 #pragma once
 
 #include <cstddef>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
 #include "common/common_types.h"
 
+#define SERIALIZE_DELAY_GENERATOR                                                                  \
+private:                                                                                           \
+    template <class Archive>                                                                       \
+    void serialize(Archive& ar, const unsigned int) {                                              \
+        ar& boost::serialization::base_object<DelayGenerator>(*this);                              \
+    }                                                                                              \
+    friend class boost::serialization::access;
+
 namespace FileSys {
 
 class DelayGenerator {
@@ -16,12 +26,20 @@ public:
     virtual u64 GetOpenDelayNs() = 0;
 
     // TODO (B3N30): Add getter for all other file/directory io operations
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {}
+    friend class boost::serialization::access;
 };
 
 class DefaultDelayGenerator : public DelayGenerator {
 public:
     u64 GetReadDelayNs(std::size_t length) override;
     u64 GetOpenDelayNs() override;
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::DefaultDelayGenerator);

src/core/file_sys/directory_backend.h

@@ -53,6 +53,11 @@ public:
      * @return true if the directory closed correctly
      */
     virtual bool Close() const = 0;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {}
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys

src/core/file_sys/disk_archive.cpp

@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <cstdio>
 #include <memory>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "common/logging/log.h"
@@ -14,6 +15,9 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::DiskFile)
+SERIALIZE_EXPORT_IMPL(FileSys::DiskDirectory)
+
 namespace FileSys {
 
 ResultVal<std::size_t> DiskFile::Read(const u64 offset, const std::size_t length,

src/core/file_sys/disk_archive.h

@@ -8,6 +8,9 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/unique_ptr.hpp>
+#include <boost/serialization/vector.hpp>
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "core/file_sys/archive_backend.h"
@@ -43,6 +46,17 @@ public:
 protected:
     Mode mode;
     std::unique_ptr<FileUtil::IOFile> file;
+
+private:
+    DiskFile() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<FileBackend>(*this);
+        ar& mode.hex;
+        ar& file;
+    }
+    friend class boost::serialization::access;
 };
 
 class DiskDirectory : public DirectoryBackend {
@@ -65,6 +79,27 @@ protected:
     // We need to remember the last entry we returned, so a subsequent call to Read will continue
     // from the next one.  This iterator will always point to the next unread entry.
     std::vector<FileUtil::FSTEntry>::iterator children_iterator;
+
+private:
+    DiskDirectory() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<DirectoryBackend>(*this);
+        ar& directory;
+        u64 child_index;
+        if (Archive::is_saving::value) {
+            child_index = children_iterator - directory.children.begin();
+        }
+        ar& child_index;
+        if (Archive::is_loading::value) {
+            children_iterator = directory.children.begin() + child_index;
+        }
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::DiskFile)
+BOOST_CLASS_EXPORT_KEY(FileSys::DiskDirectory)

src/core/file_sys/file_backend.h

@@ -7,6 +7,7 @@
 #include <algorithm>
 #include <cstddef>
 #include <memory>
+#include <boost/serialization/unique_ptr.hpp>
 #include "common/common_types.h"
 #include "core/hle/result.h"
 #include "delay_generator.h"
@@ -90,6 +91,12 @@ public:
 
 protected:
     std::unique_ptr<DelayGenerator> delay_generator;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& delay_generator;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys

src/core/file_sys/ivfc_archive.cpp

@@ -5,6 +5,7 @@
 #include <cstring>
 #include <memory>
 #include <utility>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/logging/log.h"
 #include "core/file_sys/ivfc_archive.h"
@@ -12,6 +13,12 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // FileSys namespace
 
+SERIALIZE_EXPORT_IMPL(FileSys::IVFCFile)
+SERIALIZE_EXPORT_IMPL(FileSys::IVFCFileInMemory)
+SERIALIZE_EXPORT_IMPL(FileSys::IVFCDelayGenerator)
+SERIALIZE_EXPORT_IMPL(FileSys::RomFSDelayGenerator)
+SERIALIZE_EXPORT_IMPL(FileSys::ExeFSDelayGenerator)
+
 namespace FileSys {
 
 IVFCArchive::IVFCArchive(std::shared_ptr<RomFSReader> file,

src/core/file_sys/ivfc_archive.h

@@ -8,6 +8,8 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
 #include "common/common_types.h"
 #include "common/file_util.h"
 #include "core/file_sys/archive_backend.h"
@@ -38,6 +40,8 @@ class IVFCDelayGenerator : public DelayGenerator {
         static constexpr u64 IPCDelayNanoseconds(9438006);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 class RomFSDelayGenerator : public DelayGenerator {
@@ -60,6 +64,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(9438006);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 class ExeFSDelayGenerator : public DelayGenerator {
@@ -82,6 +88,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(9438006);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 /**
@@ -128,6 +136,15 @@ public:
 
 private:
     std::shared_ptr<RomFSReader> romfs_file;
+
+    IVFCFile() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<FileBackend>(*this);
+        ar& romfs_file;
+    }
+    friend class boost::serialization::access;
 };
 
 class IVFCDirectory : public DirectoryBackend {
@@ -159,6 +176,23 @@ private:
     std::vector<u8> romfs_file;
     u64 data_offset;
     u64 data_size;
+
+    IVFCFileInMemory() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<FileBackend>(*this);
+        ar& romfs_file;
+        ar& data_offset;
+        ar& data_size;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::IVFCFile)
+BOOST_CLASS_EXPORT_KEY(FileSys::IVFCFileInMemory)
+BOOST_CLASS_EXPORT_KEY(FileSys::IVFCDelayGenerator)
+BOOST_CLASS_EXPORT_KEY(FileSys::RomFSDelayGenerator)
+BOOST_CLASS_EXPORT_KEY(FileSys::ExeFSDelayGenerator)

src/core/file_sys/layered_fs.cpp

@@ -5,6 +5,7 @@
 #include <algorithm>
 #include <cstring>
 #include "common/alignment.h"
+#include "common/archives.h"
 #include "common/assert.h"
 #include "common/common_paths.h"
 #include "common/file_util.h"
@@ -13,6 +14,8 @@
 #include "core/file_sys/layered_fs.h"
 #include "core/file_sys/patch.h"
 
+SERIALIZE_EXPORT_IMPL(FileSys::LayeredFS)
+
 namespace FileSys {
 
 struct FileRelocationInfo {
@@ -51,11 +54,16 @@ struct FileMetadata {
 };
 static_assert(sizeof(FileMetadata) == 0x20, "Size of FileMetadata is not correct");
 
-LayeredFS::LayeredFS(std::shared_ptr<RomFSReader> romfs_, std::string patch_path_,
+LayeredFS::LayeredFS() = default;
-                     std::string patch_ext_path_, bool load_relocations)
-    : romfs(std::move(romfs_)), patch_path(std::move(patch_path_)),
-      patch_ext_path(std::move(patch_ext_path_)) {
 
+LayeredFS::LayeredFS(std::shared_ptr<RomFSReader> romfs_, std::string patch_path_,
+                     std::string patch_ext_path_, bool load_relocations_)
+    : romfs(std::move(romfs_)), patch_path(std::move(patch_path_)),
+      patch_ext_path(std::move(patch_ext_path_)), load_relocations(load_relocations_) {
+    Load();
+}
+
+void LayeredFS::Load() {
     romfs->ReadFile(0, sizeof(header), reinterpret_cast<u8*>(&header));
 
     ASSERT_MSG(header.header_length == sizeof(header), "Header size is incorrect");
@@ -273,7 +281,7 @@ std::size_t GetNameSize(const std::string& name) {
 }
 
 void LayeredFS::PrepareBuildDirectory(Directory& current) {
-    directory_metadata_offset_map.emplace(&current, current_directory_offset);
+    directory_metadata_offset_map.emplace(&current, static_cast<u32>(current_directory_offset));
     directory_list.emplace_back(&current);
     current_directory_offset += sizeof(DirectoryMetadata) + GetNameSize(current.name);
 }
@@ -282,7 +290,7 @@ void LayeredFS::PrepareBuildFile(File& current) {
     if (current.relocation.type == 3) { // Deleted files are not counted
         return;
     }
-    file_metadata_offset_map.emplace(&current, current_file_offset);
+    file_metadata_offset_map.emplace(&current, static_cast<u32>(current_file_offset));
     file_list.emplace_back(&current);
     current_file_offset += sizeof(FileMetadata) + GetNameSize(current.name);
 }
@@ -361,7 +369,7 @@ void LayeredFS::BuildDirectories() {
 
         // Write metadata and name
         std::u16string u16name = Common::UTF8ToUTF16(directory->name);
-        metadata.name_length = u16name.size() * 2;
+        metadata.name_length = static_cast<u32_le>(u16name.size() * 2);
 
         std::memcpy(directory_metadata_table.data() + written, &metadata, sizeof(metadata));
         written += sizeof(metadata);
@@ -410,7 +418,7 @@ void LayeredFS::BuildFiles() {
 
         // Write metadata and name
         std::u16string u16name = Common::UTF8ToUTF16(file->name);
-        metadata.name_length = u16name.size() * 2;
+        metadata.name_length = static_cast<u32_le>(u16name.size() * 2);
 
         std::memcpy(file_metadata_table.data() + written, &metadata, sizeof(metadata));
         written += sizeof(metadata);

src/core/file_sys/layered_fs.h

@@ -9,6 +9,10 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "common/swap.h"
 #include "core/file_sys/romfs_reader.h"
@@ -92,9 +96,12 @@ private:
 
     void RebuildMetadata();
 
+    void Load();
+
     std::shared_ptr<RomFSReader> romfs;
     std::string patch_path;
     std::string patch_ext_path;
+    bool load_relocations;
 
     RomFSHeader header;
     Directory root;
@@ -118,6 +125,24 @@ private:
     u64 current_file_offset{};           // current file metadata offset
     std::vector<u8> file_metadata_table; // rebuilt file metadata table
     u64 current_data_offset{};           // current assigned data offset
+
+    LayeredFS();
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<RomFSReader>(*this);
+        ar& romfs;
+        ar& patch_path;
+        ar& patch_ext_path;
+        ar& load_relocations;
+        if (Archive::is_loading::value) {
+            Load();
+        }
+        // NOTE: Everything else is essentially cached, updated when we call Load
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::LayeredFS)

src/core/file_sys/romfs_reader.cpp

@@ -1,15 +1,18 @@
 #include <algorithm>
 #include <cryptopp/aes.h>
 #include <cryptopp/modes.h>
+#include "common/archives.h"
 #include "core/file_sys/romfs_reader.h"
 
+SERIALIZE_EXPORT_IMPL(FileSys::DirectRomFSReader)
+
 namespace FileSys {
 
 std::size_t DirectRomFSReader::ReadFile(std::size_t offset, std::size_t length, u8* buffer) {
     if (length == 0)
         return 0; // Crypto++ does not like zero size buffer
     file.Seek(file_offset + offset, SEEK_SET);
-    std::size_t read_length = std::min(length, data_size - offset);
+    std::size_t read_length = std::min(length, static_cast<std::size_t>(data_size) - offset);
     read_length = file.ReadBytes(buffer, read_length);
     if (is_encrypted) {
         CryptoPP::CTR_Mode<CryptoPP::AES>::Decryption d(key.data(), key.size(), ctr.data());

src/core/file_sys/romfs_reader.h

@@ -1,6 +1,9 @@
 #pragma once
 
 #include <array>
+#include <boost/serialization/array.hpp>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
 #include "common/common_types.h"
 #include "common/file_util.h"
 
@@ -15,6 +18,11 @@ public:
 
     virtual std::size_t GetSize() const = 0;
     virtual std::size_t ReadFile(std::size_t offset, std::size_t length, u8* buffer) = 0;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {}
+    friend class boost::serialization::access;
 };
 
 /**
@@ -45,9 +53,26 @@ private:
     FileUtil::IOFile file;
     std::array<u8, 16> key;
     std::array<u8, 16> ctr;
-    std::size_t file_offset;
+    u64 file_offset;
-    std::size_t crypto_offset;
+    u64 crypto_offset;
-    std::size_t data_size;
+    u64 data_size;
+
+    DirectRomFSReader() = default;
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<RomFSReader>(*this);
+        ar& is_encrypted;
+        ar& file;
+        ar& key;
+        ar& ctr;
+        ar& file_offset;
+        ar& crypto_offset;
+        ar& data_size;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::DirectRomFSReader)

src/core/file_sys/savedata_archive.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/archives.h"
 #include "common/file_util.h"
 #include "core/file_sys/disk_archive.h"
 #include "core/file_sys/errors.h"
@@ -33,6 +34,8 @@ public:
         static constexpr u64 IPCDelayNanoseconds(269082);
         return IPCDelayNanoseconds;
     }
+
+    SERIALIZE_DELAY_GENERATOR
 };
 
 ResultVal<std::unique_ptr<FileBackend>> SaveDataArchive::OpenFile(const Path& path,
@@ -353,3 +356,6 @@ u64 SaveDataArchive::GetFreeBytes() const {
 }
 
 } // namespace FileSys
+
+SERIALIZE_EXPORT_IMPL(FileSys::SaveDataArchive)
+SERIALIZE_EXPORT_IMPL(FileSys::SaveDataDelayGenerator)

src/core/file_sys/savedata_archive.h

@@ -38,6 +38,22 @@ public:
 
 protected:
     std::string mount_point;
+    SaveDataArchive() = default;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<ArchiveBackend>(*this);
+        ar& mount_point;
+    }
+    friend class boost::serialization::access;
 };
 
+class SaveDataDelayGenerator;
+class ExtSaveDataArchive;
+
 } // namespace FileSys
+
+BOOST_CLASS_EXPORT_KEY(FileSys::SaveDataArchive)
+BOOST_CLASS_EXPORT_KEY(FileSys::SaveDataDelayGenerator)
+BOOST_CLASS_EXPORT_KEY(FileSys::ExtSaveDataArchive)

src/core/global.h

@@ -0,0 +1,21 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Core {
+
+template <class T>
+T& Global();
+
+// Declare explicit specialisation to prevent automatic instantiation
+class System;
+template <>
+System& Global();
+
+class Timing;
+template <>
+Timing& Global();
+
+} // namespace Core

src/core/hle/kernel/address_arbiter.cpp

@@ -3,8 +3,10 @@
 // Refer to the license.txt file included.
 
 #include <algorithm>
+#include "common/archives.h"
 #include "common/common_types.h"
 #include "common/logging/log.h"
+#include "core/global.h"
 #include "core/hle/kernel/address_arbiter.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
@@ -14,6 +16,8 @@
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 // Kernel namespace
 
+SERIALIZE_EXPORT_IMPL(Kernel::AddressArbiter)
+
 namespace Kernel {
 
 void AddressArbiter::WaitThread(std::shared_ptr<Thread> thread, VAddr wait_address) {
@@ -76,16 +80,18 @@ std::shared_ptr<AddressArbiter> KernelSystem::CreateAddressArbiter(std::string n
     return address_arbiter;
 }
 
+void AddressArbiter::WakeUp(ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
+                            std::shared_ptr<WaitObject> object) {
+    ASSERT(reason == ThreadWakeupReason::Timeout);
+    // Remove the newly-awakened thread from the Arbiter's waiting list.
+    waiting_threads.erase(std::remove(waiting_threads.begin(), waiting_threads.end(), thread),
+                          waiting_threads.end());
+};
+
 ResultCode AddressArbiter::ArbitrateAddress(std::shared_ptr<Thread> thread, ArbitrationType type,
                                             VAddr address, s32 value, u64 nanoseconds) {
 
-    auto timeout_callback = [this](ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
+    auto timeout_callback = std::dynamic_pointer_cast<WakeupCallback>(shared_from_this());
-                                   std::shared_ptr<WaitObject> object) {
-        ASSERT(reason == ThreadWakeupReason::Timeout);
-        // Remove the newly-awakened thread from the Arbiter's waiting list.
-        waiting_threads.erase(std::remove(waiting_threads.begin(), waiting_threads.end(), thread),
-                              waiting_threads.end());
-    };
 
     switch (type) {
 

src/core/hle/kernel/address_arbiter.h

@@ -6,8 +6,15 @@
 
 #include <memory>
 #include <vector>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/string.hpp>
+#include <boost/serialization/vector.hpp>
+#include <boost/serialization/version.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
+#include "core/hle/kernel/thread.h"
 #include "core/hle/result.h"
 
 // Address arbiters are an underlying kernel synchronization object that can be created/used via
@@ -30,7 +37,7 @@ enum class ArbitrationType : u32 {
     DecrementAndWaitIfLessThanWithTimeout,
 };
 
-class AddressArbiter final : public Object {
+class AddressArbiter final : public Object, public WakeupCallback {
 public:
     explicit AddressArbiter(KernelSystem& kernel);
     ~AddressArbiter() override;
@@ -52,6 +59,9 @@ public:
     ResultCode ArbitrateAddress(std::shared_ptr<Thread> thread, ArbitrationType type, VAddr address,
                                 s32 value, u64 nanoseconds);
 
+    void WakeUp(ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
+                std::shared_ptr<WaitObject> object);
+
 private:
     KernelSystem& kernel;
 
@@ -67,6 +77,21 @@ private:
 
     /// Threads waiting for the address arbiter to be signaled.
     std::vector<std::shared_ptr<Thread>> waiting_threads;
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& boost::serialization::base_object<Object>(*this);
+        if (file_version > 0) {
+            ar& boost::serialization::base_object<WakeupCallback>(*this);
+        }
+        ar& name;
+        ar& waiting_threads;
+    }
 };
 
 } // namespace Kernel
+
+BOOST_CLASS_EXPORT_KEY(Kernel::AddressArbiter)
+BOOST_CLASS_VERSION(Kernel::AddressArbiter, 1)
+CONSTRUCT_KERNEL_OBJECT(Kernel::AddressArbiter)

src/core/hle/kernel/client_port.cpp

@@ -2,7 +2,9 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/archives.h"
 #include "common/assert.h"
+#include "core/global.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/kernel/errors.h"
@@ -11,6 +13,8 @@
 #include "core/hle/kernel/server_port.h"
 #include "core/hle/kernel/server_session.h"
 
+SERIALIZE_EXPORT_IMPL(Kernel::ClientPort)
+
 namespace Kernel {
 
 ClientPort::ClientPort(KernelSystem& kernel) : Object(kernel), kernel(kernel) {}

src/core/hle/kernel/client_port.h

@@ -6,6 +6,9 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/server_port.h"
@@ -59,6 +62,20 @@ private:
     std::string name;        ///< Name of client port (optional)
 
     friend class KernelSystem;
+
+private:
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& boost::serialization::base_object<Object>(*this);
+        ar& server_port;
+        ar& max_sessions;
+        ar& active_sessions;
+        ar& name;
+    }
 };
 
 } // namespace Kernel
+
+BOOST_CLASS_EXPORT_KEY(Kernel::ClientPort)
+CONSTRUCT_KERNEL_OBJECT(Kernel::ClientPort)

src/core/hle/kernel/client_session.cpp

@@ -2,8 +2,8 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "common/archives.h"
 #include "common/assert.h"
-
 #include "core/hle/kernel/client_session.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/hle_ipc.h"
@@ -11,6 +11,8 @@
 #include "core/hle/kernel/session.h"
 #include "core/hle/kernel/thread.h"
 
+SERIALIZE_EXPORT_IMPL(Kernel::ClientSession)
+
 namespace Kernel {
 
 ClientSession::ClientSession(KernelSystem& kernel) : Object(kernel) {}

src/core/hle/kernel/client_session.h

@@ -6,6 +6,10 @@
 
 #include <memory>
 #include <string>
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/result.h"
@@ -46,6 +50,18 @@ public:
 
     /// The parent session, which links to the server endpoint.
     std::shared_ptr<Session> parent;
+
+private:
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& boost::serialization::base_object<Object>(*this);
+        ar& name;
+        ar& parent;
+    }
 };
 
 } // namespace Kernel
+
+BOOST_CLASS_EXPORT_KEY(Kernel::ClientSession)
+CONSTRUCT_KERNEL_OBJECT(Kernel::ClientSession)

src/core/hle/kernel/config_mem.cpp

@@ -3,10 +3,13 @@
 // Refer to the license.txt file included.
 
 #include <cstring>
+#include "common/archives.h"
 #include "core/hle/kernel/config_mem.h"
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////
 
+SERIALIZE_EXPORT_IMPL(ConfigMem::Handler)
+
 namespace ConfigMem {
 
 Handler::Handler() {

src/core/hle/kernel/config_mem.h

@@ -9,8 +9,11 @@
 // bootrom. Because we're not emulating this, and essentially just "stubbing" the functionality, I'm
 // putting this as a subset of HLE for now.
 
+#include <boost/serialization/binary_object.hpp>
+#include <boost/serialization/export.hpp>
 #include "common/common_funcs.h"
 #include "common/common_types.h"
+#include "common/memory_ref.h"
 #include "common/swap.h"
 #include "core/memory.h"
 
@@ -49,13 +52,34 @@ struct ConfigMemDef {
 static_assert(sizeof(ConfigMemDef) == Memory::CONFIG_MEMORY_SIZE,
               "Config Memory structure size is wrong");
 
-class Handler {
+class Handler : public BackingMem {
 public:
     Handler();
     ConfigMemDef& GetConfigMem();
 
+    u8* GetPtr() override {
+        return reinterpret_cast<u8*>(&config_mem);
+    }
+
+    const u8* GetPtr() const override {
+        return reinterpret_cast<const u8*>(&config_mem);
+    }
+
+    std::size_t GetSize() const override {
+        return sizeof(config_mem);
+    }
+
 private:
     ConfigMemDef config_mem;
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& boost::serialization::base_object<BackingMem>(*this);
+        ar& boost::serialization::make_binary_object(&config_mem, sizeof(config_mem));
+    }
 };
 
 } // namespace ConfigMem
+
+BOOST_CLASS_EXPORT_KEY(ConfigMem::Handler)

src/core/hle/kernel/event.cpp

@@ -5,11 +5,14 @@
 #include <algorithm>
 #include <map>
 #include <vector>
+#include "common/archives.h"
 #include "common/assert.h"
 #include "core/hle/kernel/event.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/thread.h"
 
+SERIALIZE_EXPORT_IMPL(Kernel::Event)
+
 namespace Kernel {
 
 Event::Event(KernelSystem& kernel) : WaitObject(kernel) {}

src/core/hle/kernel/event.h

@@ -4,6 +4,9 @@
 
 #pragma once
 
+#include <boost/serialization/base_object.hpp>
+#include <boost/serialization/export.hpp>
+#include <boost/serialization/string.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/wait_object.h"
@@ -49,6 +52,18 @@ private:
     std::string name; ///< Name of event (optional)
 
     friend class KernelSystem;
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& boost::serialization::base_object<WaitObject>(*this);
+        ar& reset_type;
+        ar& signaled;
+        ar& name;
+    }
 };
 
 } // namespace Kernel
+
+BOOST_CLASS_EXPORT_KEY(Kernel::Event)
+CONSTRUCT_KERNEL_OBJECT(Kernel::Event)

src/core/hle/kernel/handle_table.h

@@ -7,6 +7,8 @@
 #include <array>
 #include <cstddef>
 #include <memory>
+#include <boost/serialization/array.hpp>
+#include <boost/serialization/shared_ptr.hpp>
 #include "common/common_types.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/result.h"
@@ -116,6 +118,15 @@ private:
     u16 next_free_slot;
 
     KernelSystem& kernel;
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& objects;
+        ar& generations;
+        ar& next_generation;
+        ar& next_free_slot;
+    }
 };
 
 } // namespace Kernel

src/core/hle/kernel/hle_ipc.cpp

@@ -16,6 +16,47 @@
 
 namespace Kernel {
 
+class HLERequestContext::ThreadCallback : public Kernel::WakeupCallback {
+
+public:
+    ThreadCallback(std::shared_ptr<HLERequestContext> context_,
+                   std::shared_ptr<HLERequestContext::WakeupCallback> callback_)
+        : context(std::move(context_)), callback(std::move(callback_)) {}
+    void WakeUp(ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
+                std::shared_ptr<WaitObject> object) {
+        ASSERT(thread->status == ThreadStatus::WaitHleEvent);
+        if (callback) {
+            callback->WakeUp(thread, *context, reason);
+        }
+
+        auto& process = thread->owner_process;
+        // We must copy the entire command buffer *plus* the entire static buffers area, since
+        // the translation might need to read from it in order to retrieve the StaticBuffer
+        // target addresses.
+        std::array<u32_le, IPC::COMMAND_BUFFER_LENGTH + 2 * IPC::MAX_STATIC_BUFFERS> cmd_buff;
+        Memory::MemorySystem& memory = context->kernel.memory;
+        memory.ReadBlock(*process, thread->GetCommandBufferAddress(), cmd_buff.data(),
+                         cmd_buff.size() * sizeof(u32));
+        context->WriteToOutgoingCommandBuffer(cmd_buff.data(), *process);
+        // Copy the translated command buffer back into the thread's command buffer area.
+        memory.WriteBlock(*process, thread->GetCommandBufferAddress(), cmd_buff.data(),
+                          cmd_buff.size() * sizeof(u32));
+    }
+
+private:
+    ThreadCallback() = default;
+    std::shared_ptr<HLERequestContext::WakeupCallback> callback{};
+    std::shared_ptr<HLERequestContext> context{};
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& boost::serialization::base_object<Kernel::WakeupCallback>(*this);
+        ar& callback;
+        ar& context;
+    }
+    friend class boost::serialization::access;
+};
+
 SessionRequestHandler::SessionInfo::SessionInfo(std::shared_ptr<ServerSession> session,
                                                 std::unique_ptr<SessionDataBase> data)
     : session(std::move(session)), data(std::move(data)) {}
@@ -33,34 +74,16 @@ void SessionRequestHandler::ClientDisconnected(std::shared_ptr<ServerSession> se
         connected_sessions.end());
 }
 
-std::shared_ptr<Event> HLERequestContext::SleepClientThread(const std::string& reason,
+std::shared_ptr<Event> HLERequestContext::SleepClientThread(
-                                                            std::chrono::nanoseconds timeout,
+    const std::string& reason, std::chrono::nanoseconds timeout,
-                                                            WakeupCallback&& callback) {
+    std::shared_ptr<WakeupCallback> callback) {
     // Put the client thread to sleep until the wait event is signaled or the timeout expires.
-    thread->wakeup_callback = [context = *this,
+    thread->wakeup_callback = std::make_shared<ThreadCallback>(shared_from_this(), callback);
-                               callback](ThreadWakeupReason reason, std::shared_ptr<Thread> thread,
-                                         std::shared_ptr<WaitObject> object) mutable {
-        ASSERT(thread->status == ThreadStatus::WaitHleEvent);
-        callback(thread, context, reason);
-
-        auto& process = thread->owner_process;
-        // We must copy the entire command buffer *plus* the entire static buffers area, since
-        // the translation might need to read from it in order to retrieve the StaticBuffer
-        // target addresses.
-        std::array<u32_le, IPC::COMMAND_BUFFER_LENGTH + 2 * IPC::MAX_STATIC_BUFFERS> cmd_buff;
-        Memory::MemorySystem& memory = context.kernel.memory;
-        memory.ReadBlock(*process, thread->GetCommandBufferAddress(), cmd_buff.data(),
-                         cmd_buff.size() * sizeof(u32));
-        context.WriteToOutgoingCommandBuffer(cmd_buff.data(), *process);
-        // Copy the translated command buffer back into the thread's command buffer area.
-        memory.WriteBlock(*process, thread->GetCommandBufferAddress(), cmd_buff.data(),
-                          cmd_buff.size() * sizeof(u32));
-    };
 
     auto event = kernel.CreateEvent(Kernel::ResetType::OneShot, "HLE Pause Event: " + reason);
     thread->status = ThreadStatus::WaitHleEvent;
     thread->wait_objects = {event};
-    event->AddWaitingThread(SharedFrom(thread));
+    event->AddWaitingThread(thread);
 
     if (timeout.count() > 0)
         thread->WakeAfterDelay(timeout.count());
@@ -68,8 +91,10 @@ std::shared_ptr<Event> HLERequestContext::SleepClientThread(const std::string& r
     return event;
 }
 
+HLERequestContext::HLERequestContext() : kernel(Core::Global<KernelSystem>()) {}
+
 HLERequestContext::HLERequestContext(KernelSystem& kernel, std::shared_ptr<ServerSession> session,
-                                     Thread* thread)
+                                     std::shared_ptr<Thread> thread)
     : kernel(kernel), session(std::move(session)), thread(thread) {
     cmd_buf[0] = 0;
 }
@@ -98,8 +123,9 @@ void HLERequestContext::AddStaticBuffer(u8 buffer_id, std::vector<u8> data) {
     static_buffers[buffer_id] = std::move(data);
 }
 
-ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf,
+ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(
-                                                                Process& src_process) {
+    const u32_le* src_cmdbuf, std::shared_ptr<Process> src_process_) {
+    auto& src_process = *src_process_;
     IPC::Header header{src_cmdbuf[0]};
 
     std::size_t untranslated_size = 1u + header.normal_params_size;
@@ -158,7 +184,7 @@ ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* sr
         }
         case IPC::DescriptorType::MappedBuffer: {
             u32 next_id = static_cast<u32>(request_mapped_buffers.size());
-            request_mapped_buffers.emplace_back(kernel.memory, src_process, descriptor,
+            request_mapped_buffers.emplace_back(kernel.memory, src_process_, descriptor,
                                                 src_cmdbuf[i], next_id);
             cmd_buf[i++] = next_id;
             break;
@@ -170,7 +196,7 @@ ResultCode HLERequestContext::PopulateFromIncomingCommandBuffer(const u32_le* sr
 
     if (should_record) {
         std::vector<u32> translated_cmdbuf{cmd_buf.begin(), cmd_buf.begin() + command_size};
-        kernel.GetIPCRecorder().SetRequestInfo(SharedFrom(thread), std::move(untranslated_cmdbuf),
+        kernel.GetIPCRecorder().SetRequestInfo(thread, std::move(untranslated_cmdbuf),
                                                std::move(translated_cmdbuf));
     }
 
@@ -248,7 +274,7 @@ ResultCode HLERequestContext::WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf,
 
     if (should_record) {
         std::vector<u32> translated_cmdbuf{dst_cmdbuf, dst_cmdbuf + command_size};
-        kernel.GetIPCRecorder().SetReplyInfo(SharedFrom(thread), std::move(untranslated_cmdbuf),
+        kernel.GetIPCRecorder().SetReplyInfo(thread, std::move(untranslated_cmdbuf),
                                              std::move(translated_cmdbuf));
     }
 
@@ -262,13 +288,15 @@ MappedBuffer& HLERequestContext::GetMappedBuffer(u32 id_from_cmdbuf) {
 
 void HLERequestContext::ReportUnimplemented() const {
     if (kernel.GetIPCRecorder().IsEnabled()) {
-        kernel.GetIPCRecorder().SetHLEUnimplemented(SharedFrom(thread));
+        kernel.GetIPCRecorder().SetHLEUnimplemented(thread);
     }
 }
 
-MappedBuffer::MappedBuffer(Memory::MemorySystem& memory, const Process& process, u32 descriptor,
+MappedBuffer::MappedBuffer() : memory(&Core::Global<Core::System>().Memory()) {}
-                           VAddr address, u32 id)
+
-    : memory(&memory), id(id), address(address), process(&process) {
+MappedBuffer::MappedBuffer(Memory::MemorySystem& memory, std::shared_ptr<Process> process,
+                           u32 descriptor, VAddr address, u32 id)
+    : memory(&memory), id(id), address(address), process(std::move(process)) {
     IPC::MappedBufferDescInfo desc{descriptor};
     size = desc.size;
     perms = desc.perms;
@@ -287,3 +315,5 @@ void MappedBuffer::Write(const void* src_buffer, std::size_t offset, std::size_t
 }
 
 } // namespace Kernel
+
+SERIALIZE_EXPORT_IMPL(Kernel::HLERequestContext::ThreadCallback)

src/core/hle/kernel/hle_ipc.h

@@ -11,7 +11,12 @@
 #include <string>
 #include <vector>
 #include <boost/container/small_vector.hpp>
+#include <boost/serialization/assume_abstract.hpp>
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/unique_ptr.hpp>
+#include <boost/serialization/vector.hpp>
 #include "common/common_types.h"
+#include "common/serialization/boost_small_vector.hpp"
 #include "common/swap.h"
 #include "core/hle/ipc.h"
 #include "core/hle/kernel/object.h"
@@ -68,6 +73,11 @@ public:
     /// in each service must inherit from this.
     struct SessionDataBase {
         virtual ~SessionDataBase() = default;
+
+    private:
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int file_version) {}
+        friend class boost::serialization::access;
     };
 
 protected:
@@ -90,15 +100,33 @@ protected:
 
         std::shared_ptr<ServerSession> session;
         std::unique_ptr<SessionDataBase> data;
+
+    private:
+        SessionInfo() = default;
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int file_version) {
+            ar& session;
+            ar& data;
+        }
+        friend class boost::serialization::access;
     };
     /// List of sessions that are connected to this handler. A ServerSession whose server endpoint
     /// is an HLE implementation is kept alive by this list for the duration of the connection.
     std::vector<SessionInfo> connected_sessions;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& connected_sessions;
+    }
+    friend class boost::serialization::access;
 };
 
+// NOTE: The below classes are ephemeral and don't need serialization
+
 class MappedBuffer {
 public:
-    MappedBuffer(Memory::MemorySystem& memory, const Process& process, u32 descriptor,
+    MappedBuffer(Memory::MemorySystem& memory, std::shared_ptr<Process> process, u32 descriptor,
                  VAddr address, u32 id);
 
     // interface for service
@@ -122,9 +150,21 @@ private:
     Memory::MemorySystem* memory;
     u32 id;
     VAddr address;
-    const Process* process;
+    std::shared_ptr<Process> process;
-    std::size_t size;
+    u32 size;
     IPC::MappedBufferPermissions perms;
+
+    MappedBuffer();
+
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& id;
+        ar& address;
+        ar& process;
+        ar& size;
+        ar& perms;
+    }
+    friend class boost::serialization::access;
 };
 
 /**
@@ -156,9 +196,10 @@ private:
  * id of the memory interface and let kernel convert it back to client vaddr. No real unmapping is
  * needed in this case, though.
  */
-class HLERequestContext {
+class HLERequestContext : public std::enable_shared_from_this<HLERequestContext> {
 public:
-    HLERequestContext(KernelSystem& kernel, std::shared_ptr<ServerSession> session, Thread* thread);
+    HLERequestContext(KernelSystem& kernel, std::shared_ptr<ServerSession> session,
+                      std::shared_ptr<Thread> thread);
     ~HLERequestContext();
 
     /// Returns a pointer to the IPC command buffer for this request.
@@ -174,8 +215,17 @@ public:
         return session;
     }
 
-    using WakeupCallback = std::function<void(
+    class WakeupCallback {
-        std::shared_ptr<Thread> thread, HLERequestContext& context, ThreadWakeupReason reason)>;
+    public:
+        virtual ~WakeupCallback() = default;
+        virtual void WakeUp(std::shared_ptr<Thread> thread, HLERequestContext& context,
+                            ThreadWakeupReason reason) = 0;
+
+    private:
+        template <class Archive>
+        void serialize(Archive& ar, const unsigned int) {}
+        friend class boost::serialization::access;
+    };
 
     /**
      * Puts the specified guest thread to sleep until the returned event is signaled or until the
@@ -190,7 +240,7 @@ public:
      */
     std::shared_ptr<Event> SleepClientThread(const std::string& reason,
                                              std::chrono::nanoseconds timeout,
-                                             WakeupCallback&& callback);
+                                             std::shared_ptr<WakeupCallback> callback);
 
     /**
      * Resolves a object id from the request command buffer into a pointer to an object. See the
@@ -230,24 +280,42 @@ public:
     MappedBuffer& GetMappedBuffer(u32 id_from_cmdbuf);
 
     /// Populates this context with data from the requesting process/thread.
-    ResultCode PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf, Process& src_process);
+    ResultCode PopulateFromIncomingCommandBuffer(const u32_le* src_cmdbuf,
+                                                 std::shared_ptr<Process> src_process);
     /// Writes data from this context back to the requesting process/thread.
     ResultCode WriteToOutgoingCommandBuffer(u32_le* dst_cmdbuf, Process& dst_process) const;
 
     /// Reports an unimplemented function.
     void ReportUnimplemented() const;
 
+    class ThreadCallback;
+    friend class ThreadCallback;
+
 private:
     KernelSystem& kernel;
     std::array<u32, IPC::COMMAND_BUFFER_LENGTH> cmd_buf;
     std::shared_ptr<ServerSession> session;
-    Thread* thread;
+    std::shared_ptr<Thread> thread;
     // TODO(yuriks): Check common usage of this and optimize size accordingly
     boost::container::small_vector<std::shared_ptr<Object>, 8> request_handles;
     // The static buffers will be created when the IPC request is translated.
     std::array<std::vector<u8>, IPC::MAX_STATIC_BUFFERS> static_buffers;
     // The mapped buffers will be created when the IPC request is translated
     boost::container::small_vector<MappedBuffer, 8> request_mapped_buffers;
+
+    HLERequestContext();
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int) {
+        ar& cmd_buf;
+        ar& session;
+        ar& thread;
+        ar& request_handles;
+        ar& static_buffers;
+        ar& request_mapped_buffers;
+    }
+    friend class boost::serialization::access;
 };
 
 } // namespace Kernel
+
+BOOST_CLASS_EXPORT_KEY(Kernel::HLERequestContext::ThreadCallback)

src/core/hle/kernel/ipc.cpp

@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include "common/alignment.h"
+#include "common/memory_ref.h"
 #include "core/core.h"
 #include "core/hle/ipc.h"
 #include "core/hle/kernel/handle_table.h"
@@ -71,7 +72,7 @@ ResultCode TranslateCommandBuffer(Kernel::KernelSystem& kernel, Memory::MemorySy
                 if (handle == CurrentThread) {
                     object = src_thread;
                 } else if (handle == CurrentProcess) {
-                    object = SharedFrom(src_process);
+                    object = src_process;
                 } else if (handle != 0) {
                     object = src_process->handle_table.GetGeneric(handle);
                     if (descriptor == IPC::DescriptorType::MoveHandle) {
@@ -193,28 +194,29 @@ ResultCode TranslateCommandBuffer(Kernel::KernelSystem& kernel, Memory::MemorySy
             // TODO(Subv): Perform permission checks.
 
             // Reserve a page of memory before the mapped buffer
-            auto reserve_buffer = std::make_unique<u8[]>(Memory::PAGE_SIZE);
+            std::shared_ptr<BackingMem> reserve_buffer =
+                std::make_shared<BufferMem>(Memory::PAGE_SIZE);
             dst_process->vm_manager.MapBackingMemoryToBase(
-                Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer.get(),
+                Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer,
                 Memory::PAGE_SIZE, Kernel::MemoryState::Reserved);
 
-            auto buffer = std::make_unique<u8[]>(num_pages * Memory::PAGE_SIZE);
+            std::shared_ptr<BackingMem> buffer =
-            memory.ReadBlock(*src_process, source_address, buffer.get() + page_offset, size);
+                std::make_shared<BufferMem>(num_pages * Memory::PAGE_SIZE);
+            memory.ReadBlock(*src_process, source_address, buffer->GetPtr() + page_offset, size);
 
             // Map the page(s) into the target process' address space.
             target_address =
                 dst_process->vm_manager
                     .MapBackingMemoryToBase(Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE,
-                                            buffer.get(), num_pages * Memory::PAGE_SIZE,
+                                            buffer, buffer->GetSize(), Kernel::MemoryState::Shared)
-                                            Kernel::MemoryState::Shared)
                     .Unwrap();
 
             cmd_buf[i++] = target_address + page_offset;
 
             // Reserve a page of memory after the mapped buffer
             dst_process->vm_manager.MapBackingMemoryToBase(
-                Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer.get(),
+                Memory::IPC_MAPPING_VADDR, Memory::IPC_MAPPING_SIZE, reserve_buffer,
-                Memory::PAGE_SIZE, Kernel::MemoryState::Reserved);
+                reserve_buffer->GetSize(), Kernel::MemoryState::Reserved);
 
             mapped_buffer_context.push_back({permissions, size, source_address,
                                              target_address + page_offset, std::move(buffer),

src/core/hle/kernel/ipc.h

@@ -6,6 +6,7 @@
 
 #include <memory>
 #include <vector>
+#include <boost/serialization/shared_ptr.hpp>
 #include "common/common_types.h"
 #include "core/hle/ipc.h"
 #include "core/hle/kernel/thread.h"
@@ -24,8 +25,20 @@ struct MappedBufferContext {
     VAddr source_address;
     VAddr target_address;
 
-    std::unique_ptr<u8[]> buffer;
+    std::shared_ptr<BackingMem> buffer;
-    std::unique_ptr<u8[]> reserve_buffer;
+    std::shared_ptr<BackingMem> reserve_buffer;
+
+private:
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& permissions;
+        ar& size;
+        ar& source_address;
+        ar& target_address;
+        ar& buffer;
+        ar& reserve_buffer;
+    }
+    friend class boost::serialization::access;
 };
 
 /// Performs IPC command buffer translation from one process to another.

src/core/hle/kernel/ipc_debugger/recorder.cpp

@@ -52,7 +52,7 @@ void Recorder::RegisterRequest(const std::shared_ptr<Kernel::ClientSession>& cli
 
     RequestRecord record = {/* id */ ++record_count,
                             /* status */ RequestStatus::Sent,
-                            /* client_process */ GetObjectInfo(client_thread->owner_process),
+                            /* client_process */ GetObjectInfo(client_thread->owner_process.get()),
                             /* client_thread */ GetObjectInfo(client_thread.get()),
                             /* client_session */ GetObjectInfo(client_session.get()),
                             /* client_port */ GetObjectInfo(client_session->parent->port.get()),
@@ -82,7 +82,7 @@ void Recorder::SetRequestInfo(const std::shared_ptr<Kernel::Thread>& client_thre
     record.translated_request_cmdbuf = std::move(translated_cmdbuf);
 
     if (server_thread) {
-        record.server_process = GetObjectInfo(server_thread->owner_process);
+        record.server_process = GetObjectInfo(server_thread->owner_process.get());
         record.server_thread = GetObjectInfo(server_thread.get());
     } else {
         record.is_hle = true;

src/core/hle/kernel/kernel.cpp

@@ -2,6 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <boost/serialization/shared_ptr.hpp>
+#include <boost/serialization/unordered_map.hpp>
+#include <boost/serialization/vector.hpp>
+#include "common/archives.h"
+#include "common/serialization/atomic.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/config_mem.h"
 #include "core/hle/kernel/handle_table.h"
@@ -22,6 +27,8 @@ KernelSystem::KernelSystem(Memory::MemorySystem& memory, Core::Timing& timing,
                            u32 num_cores, u8 n3ds_mode)
     : memory(memory), timing(timing),
       prepare_reschedule_callback(std::move(prepare_reschedule_callback)) {
+    std::generate(memory_regions.begin(), memory_regions.end(),
+                  [] { return std::make_shared<MemoryRegionInfo>(); });
     MemoryInit(system_mode, n3ds_mode);
 
     resource_limits = std::make_unique<ResourceLimitList>(*this);
@@ -58,24 +65,23 @@ std::shared_ptr<Process> KernelSystem::GetCurrentProcess() const {
 
 void KernelSystem::SetCurrentProcess(std::shared_ptr<Process> process) {
     current_process = process;
-    SetCurrentMemoryPageTable(&process->vm_manager.page_table);
+    SetCurrentMemoryPageTable(process->vm_manager.page_table);
 }
 
 void KernelSystem::SetCurrentProcessForCPU(std::shared_ptr<Process> process, u32 core_id) {
     if (current_cpu->GetID() == core_id) {
         current_process = process;
-        SetCurrentMemoryPageTable(&process->vm_manager.page_table);
+        SetCurrentMemoryPageTable(process->vm_manager.page_table);
     } else {
         stored_processes[core_id] = process;
-        thread_managers[core_id]->cpu->PageTableChanged(&process->vm_manager.page_table);
+        thread_managers[core_id]->cpu->SetPageTable(process->vm_manager.page_table);
     }
 }
 
-void KernelSystem::SetCurrentMemoryPageTable(Memory::PageTable* page_table) {
+void KernelSystem::SetCurrentMemoryPageTable(std::shared_ptr<Memory::PageTable> page_table) {
     memory.SetCurrentPageTable(page_table);
     if (current_cpu != nullptr) {
-        // Notify the CPU the page table in memory has changed
+        current_cpu->SetPageTable(page_table);
-        current_cpu->PageTableChanged(page_table);
     }
 }
 
@@ -150,4 +156,29 @@ void KernelSystem::ResetThreadIDs() {
     next_thread_id = 0;
 }
 
+template <class Archive>
+void KernelSystem::serialize(Archive& ar, const unsigned int file_version) {
+    ar& memory_regions;
+    ar& named_ports;
+    // current_cpu set externally
+    // NB: subsystem references and prepare_reschedule_callback are constant
+    ar&* resource_limits.get();
+    ar& next_object_id;
+    ar&* timer_manager.get();
+    ar& next_process_id;
+    ar& process_list;
+    ar& current_process;
+    // NB: core count checked in 'core'
+    for (auto& thread_manager : thread_managers) {
+        ar&* thread_manager.get();
+    }
+    ar& config_mem_handler;
+    ar& shared_page_handler;
+    ar& stored_processes;
+    ar& next_thread_id;
+    // Deliberately don't include debugger info to allow debugging through loads
+}
+
+SERIALIZE_IMPL(KernelSystem)
+
 } // namespace Kernel

src/core/hle/kernel/kernel.h

@@ -132,7 +132,8 @@ public:
      */
     ResultVal<std::shared_ptr<Thread>> CreateThread(std::string name, VAddr entry_point,
                                                     u32 priority, u32 arg, s32 processor_id,
-                                                    VAddr stack_top, Process& owner_process);
+                                                    VAddr stack_top,
+                                                    std::shared_ptr<Process> owner_process);
 
     /**
      * Creates a semaphore.
@@ -213,7 +214,7 @@ public:
     void SetCurrentProcess(std::shared_ptr<Process> process);
     void SetCurrentProcessForCPU(std::shared_ptr<Process> process, u32 core_id);
 
-    void SetCurrentMemoryPageTable(Memory::PageTable* page_table);
+    void SetCurrentMemoryPageTable(std::shared_ptr<Memory::PageTable> page_table);
 
     void SetCPUs(std::vector<std::shared_ptr<ARM_Interface>> cpu);
 
@@ -236,11 +237,11 @@ public:
     IPCDebugger::Recorder& GetIPCRecorder();
     const IPCDebugger::Recorder& GetIPCRecorder() const;
 
-    MemoryRegionInfo* GetMemoryRegion(MemoryRegion region);
+    std::shared_ptr<MemoryRegionInfo> GetMemoryRegion(MemoryRegion region);
 
     void HandleSpecialMapping(VMManager& address_space, const AddressMapping& mapping);
 
-    std::array<MemoryRegionInfo, 3> memory_regions;
+    std::array<std::shared_ptr<MemoryRegionInfo>, 3> memory_regions{};
 
     /// Adds a port to the named port table
     void AddNamedPort(std::string name, std::shared_ptr<ClientPort> port);
@@ -291,12 +292,16 @@ private:
 
     std::vector<std::unique_ptr<ThreadManager>> thread_managers;
 
-    std::unique_ptr<ConfigMem::Handler> config_mem_handler;
+    std::shared_ptr<ConfigMem::Handler> config_mem_handler;
-    std::unique_ptr<SharedPage::Handler> shared_page_handler;
+    std::shared_ptr<SharedPage::Handler> shared_page_handler;
 
     std::unique_ptr<IPCDebugger::Recorder> ipc_recorder;
 
     u32 next_thread_id;
+
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version);
 };
 
 } // namespace Kernel

src/core/hle/kernel/memory.cpp

@@ -71,32 +71,32 @@ void KernelSystem::MemoryInit(u32 mem_type, u8 n3ds_mode) {
     // the sizes specified in the memory_region_sizes table.
     VAddr base = 0;
     for (int i = 0; i < 3; ++i) {
-        memory_regions[i].Reset(base, memory_region_sizes[mem_type][i]);
+        memory_regions[i]->Reset(base, memory_region_sizes[mem_type][i]);
 
-        base += memory_regions[i].size;
+        base += memory_regions[i]->size;
     }
 
     // We must've allocated the entire FCRAM by the end
     ASSERT(base == (is_new_3ds ? Memory::FCRAM_N3DS_SIZE : Memory::FCRAM_SIZE));
 
-    config_mem_handler = std::make_unique<ConfigMem::Handler>();
+    config_mem_handler = std::make_shared<ConfigMem::Handler>();
     auto& config_mem = config_mem_handler->GetConfigMem();
     config_mem.app_mem_type = reported_mem_type;
     config_mem.app_mem_alloc = memory_region_sizes[reported_mem_type][0];
-    config_mem.sys_mem_alloc = memory_regions[1].size;
+    config_mem.sys_mem_alloc = memory_regions[1]->size;
-    config_mem.base_mem_alloc = memory_regions[2].size;
+    config_mem.base_mem_alloc = memory_regions[2]->size;
 
-    shared_page_handler = std::make_unique<SharedPage::Handler>(timing);
+    shared_page_handler = std::make_shared<SharedPage::Handler>(timing);
 }
 
-MemoryRegionInfo* KernelSystem::GetMemoryRegion(MemoryRegion region) {
+std::shared_ptr<MemoryRegionInfo> KernelSystem::GetMemoryRegion(MemoryRegion region) {
     switch (region) {
     case MemoryRegion::APPLICATION:
-        return &memory_regions[0];
+        return memory_regions[0];
     case MemoryRegion::SYSTEM:
-        return &memory_regions[1];
+        return memory_regions[1];
     case MemoryRegion::BASE:
-        return &memory_regions[2];
+        return memory_regions[2];
     default:
         UNREACHABLE();
     }
@@ -147,7 +147,7 @@ void KernelSystem::HandleSpecialMapping(VMManager& address_space, const AddressM
         return;
     }
 
-    u8* target_pointer = memory.GetPhysicalPointer(area->paddr_base + offset_into_region);
+    auto target_pointer = memory.GetPhysicalRef(area->paddr_base + offset_into_region);
 
     // TODO(yuriks): This flag seems to have some other effect, but it's unknown what
     MemoryState memory_state = mapping.unk_flag ? MemoryState::Static : MemoryState::IO;
@@ -160,20 +160,16 @@ void KernelSystem::HandleSpecialMapping(VMManager& address_space, const AddressM
 }
 
 void KernelSystem::MapSharedPages(VMManager& address_space) {
-    auto cfg_mem_vma =
+    auto cfg_mem_vma = address_space
-        address_space
+                           .MapBackingMemory(Memory::CONFIG_MEMORY_VADDR, {config_mem_handler},
-            .MapBackingMemory(Memory::CONFIG_MEMORY_VADDR,
+                                             Memory::CONFIG_MEMORY_SIZE, MemoryState::Shared)
-                              reinterpret_cast<u8*>(&config_mem_handler->GetConfigMem()),
+                           .Unwrap();
-                              Memory::CONFIG_MEMORY_SIZE, MemoryState::Shared)
-            .Unwrap();
     address_space.Reprotect(cfg_mem_vma, VMAPermission::Read);
 
-    auto shared_page_vma =
+    auto shared_page_vma = address_space
-        address_space
+                               .MapBackingMemory(Memory::SHARED_PAGE_VADDR, {shared_page_handler},
-            .MapBackingMemory(Memory::SHARED_PAGE_VADDR,
+                                                 Memory::SHARED_PAGE_SIZE, MemoryState::Shared)
-                              reinterpret_cast<u8*>(&shared_page_handler->GetSharedPage()),
+                               .Unwrap();
-                              Memory::SHARED_PAGE_SIZE, MemoryState::Shared)
-            .Unwrap();
     address_space.Reprotect(shared_page_vma, VMAPermission::Read);
 }
 

src/core/hle/kernel/memory.h

@@ -6,7 +6,9 @@
 
 #include <optional>
 #include <boost/icl/interval_set.hpp>
+#include <boost/serialization/set.hpp>
 #include "common/common_types.h"
+#include "common/serialization/boost_interval_set.hpp"
 
 namespace Kernel {
 
@@ -60,6 +62,16 @@ struct MemoryRegionInfo {
      * @param size the size of the region to free.
      */
     void Free(u32 offset, u32 size);
+
+private:
+    friend class boost::serialization::access;
+    template <class Archive>
+    void serialize(Archive& ar, const unsigned int file_version) {
+        ar& base;
+        ar& size;
+        ar& used;
+        ar& free_blocks;
+    }
 };
 
 } // namespace Kernel

src/core/hle/kernel/mutex.cpp

@@ -4,14 +4,18 @@
 
 #include <map>
 #include <vector>
+#include "common/archives.h"
 #include "common/assert.h"
 #include "core/core.h"
+#include "core/global.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/thread.h"
 
+SERIALIZE_EXPORT_IMPL(Kernel::Mutex)
+
 namespace Kernel {
 
 void ReleaseThreadMutexes(Thread* thread) {