Added Signals; more runtime fixes

src/citra_qt/main.cpp

@@ -1504,19 +1504,12 @@ void GMainWindow::OnCheats() {
 }
 
 void GMainWindow::OnSave() {
-    Core::System& system{Core::System::GetInstance()};
-    auto fs = std::ofstream("save0.citrasave");
-    emu_thread->SetRunning(false);
-    Core::System::GetInstance().Save(fs);
-    emu_thread->SetRunning(true);
+    Core::System::GetInstance().SendSignal(Core::System::Signal::Save);
 }
 
 void GMainWindow::OnLoad() {
     if (QFileInfo("save0.citrasave").exists()) {
-        auto fs = std::ifstream("save0.citrasave");
-        emu_thread->SetRunning(false);
-        Core::System::GetInstance().Load(fs);
-        emu_thread->SetRunning(true);
+        Core::System::GetInstance().SendSignal(Core::System::Signal::Load);
     }
 }
 

src/common/thread_queue_list.h

@@ -160,15 +160,33 @@ private:
     // The priority level queues of thread ids.
     std::array<Queue, NUM_QUEUES> queues;
 
+    s32 ToIndex(Queue* q) const {
+        if (q == nullptr) {
+            return -2;
+        } else if (q == UnlinkedTag()) {
+            return -1;
+        } else {
+            return static_cast<s32>(q - &queues[0]);
+        }
+    }
+
+    Queue* ToPointer(s32 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 {
-        s32 idx = first == UnlinkedTag() ? -1 : static_cast<s32>(first - &queues[0]);
+        s32 idx = ToIndex(first);
         ar << idx;
         for (auto i = 0; i < NUM_QUEUES; i++) {
-            s32 idx1 = first == UnlinkedTag()
-                           ? -1
-                           : static_cast<s32>(queues[i].next_nonempty - &queues[0]);
+            s32 idx1 = ToIndex(queues[i].next_nonempty);
             ar << idx1;
             ar << queues[i].data;
         }
@@ -178,10 +196,10 @@ private:
     void load(Archive& ar, const unsigned int file_version) {
         s32 idx;
         ar >> idx;
-        first = idx < 0 ? UnlinkedTag() : &queues[idx];
+        first = ToPointer(idx);
         for (auto i = 0; i < NUM_QUEUES; i++) {
             ar >> idx;
-            queues[i].next_nonempty = idx < 0 ? UnlinkedTag() : &queues[idx];
+            queues[i].next_nonempty = ToPointer(idx);
             ar >> queues[i].data;
         }
     }

src/core/arm/arm_interface.h

@@ -264,7 +264,7 @@ private:
             ar >> r;
             SetCP15Register(static_cast<CP15Register>(i), r);
         }
-        // TODO: Clear caches etc?
+        ClearInstructionCache();
     }
 
     BOOST_SERIALIZATION_SPLIT_MEMBER()

src/core/core.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <fstream>
 #include <memory>
 #include <utility>
 #include <boost/serialization/array.hpp>
@@ -103,15 +104,38 @@ System::ResultStatus System::RunLoop(bool tight_loop) {
     HW::Update();
     Reschedule();
 
-    if (reset_requested.exchange(false)) {
+    auto signal = current_signal.exchange(Signal::None);
+    switch (signal) {
+    case Signal::Reset:
         Reset();
-    } else if (shutdown_requested.exchange(false)) {
+        break;
+    case Signal::Shutdown:
         return ResultStatus::ShutdownRequested;
+        break;
+    case Signal::Load: {
+        auto stream = std::ifstream("save0.citrasave", std::fstream::binary);
+        System::Load(stream);
+    } break;
+    case Signal::Save: {
+        auto stream = std::ofstream("save0.citrasave", std::fstream::binary);
+        System::Save(stream);
+    } break;
+    default:
+        break;
     }
 
     return status;
 }
 
+bool System::SendSignal(System::Signal signal) {
+    auto prev = System::Signal::None;
+    if (!current_signal.compare_exchange_strong(prev, signal)) {
+        LOG_ERROR(Core, "Unable to {} as {} is ongoing", signal, prev);
+        return false;
+    }
+    return true;
+}
+
 System::ResultStatus System::SingleStep() {
     return RunLoop(false);
 }
@@ -216,8 +240,8 @@ System::ResultStatus System::Init(Frontend::EmuWindow& emu_window, u32 system_mo
 
     timing = std::make_unique<Timing>();
 
-    kernel = std::make_unique<Kernel::KernelSystem>(
-        *memory, *timing, [this] { PrepareReschedule(); }, system_mode);
+    kernel = std::make_unique<Kernel::KernelSystem>(*memory, *timing,
+                                                    [this] { PrepareReschedule(); }, system_mode);
 
     if (Settings::values.use_cpu_jit) {
 #ifdef ARCHITECTURE_x86_64
@@ -409,6 +433,7 @@ void System::Reset() {
 
 template <class Archive>
 void System::serialize(Archive& ar, const unsigned int file_version) {
+    Memory::RasterizerFlushAndInvalidateRegion(0, 0xFFFFFFFF);
     ar&* cpu_core.get();
     ar&* service_manager.get();
     ar& GPU::g_regs;
@@ -436,11 +461,20 @@ void System::Save(std::ostream& stream) const {
 }
 
 void System::Load(std::istream& stream) {
-    {
-        iarchive ia{stream};
-        ia&* this;
+    try {
+
+        {
+            iarchive ia{stream};
+            ia&* this;
+        }
+        VideoCore::Load(stream);
+
+        // Flush state through:
+        Kernel().SetCurrentProcess(Kernel().GetCurrentProcess());
+
+    } catch (const std::exception& e) {
+        LOG_ERROR(Core, "Error loading: {}", e.what());
     }
-    VideoCore::Load(stream);
 }
 
 } // namespace Core

src/core/core.h

@@ -116,14 +116,18 @@ public:
     /// Shutdown and then load again
     void Reset();
 
+    enum class Signal : u32 { None, Shutdown, Reset, Save, Load };
+
+    bool SendSignal(Signal signal);
+
     /// 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);
     }
 
     /**
@@ -341,8 +345,7 @@ private:
     Frontend::EmuWindow* m_emu_window;
     std::string m_filepath;
 
-    std::atomic<bool> reset_requested;
-    std::atomic<bool> shutdown_requested;
+    std::atomic<Signal> current_signal;
 
     friend class boost::serialization::access;
     template <typename Archive>

src/core/core_timing.cpp

@@ -23,14 +23,10 @@ bool Timing::Event::operator<(const Event& right) const {
 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(),
-               "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});
+    auto info = event_types.emplace(name, TimingEventType{});
     TimingEventType* event_type = &info.first->second;
     event_type->name = &info.first->first;
+    event_type->callback = callback;
     return event_type;
 }
 
@@ -129,6 +125,10 @@ void Timing::Advance() {
         Event evt = std::move(event_queue.front());
         std::pop_heap(event_queue.begin(), event_queue.end(), std::greater<>());
         event_queue.pop_back();
+        if (event_types.find(*evt.type->name) == event_types.end()) {
+            LOG_ERROR(Core, "Unknown queued event");
+            continue;
+        }
         evt.type->callback(evt.userdata, global_timer - evt.time);
     }
 

src/core/file_sys/ivfc_archive.cpp

@@ -14,6 +14,7 @@
 // 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)

src/core/file_sys/ivfc_archive.h

@@ -176,11 +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/hle/kernel/kernel.cpp

@@ -23,6 +23,9 @@ KernelSystem::KernelSystem(Memory::MemorySystem& memory, Core::Timing& timing,
                            std::function<void()> prepare_reschedule_callback, u32 system_mode)
     : memory(memory), timing(timing),
       prepare_reschedule_callback(std::move(prepare_reschedule_callback)) {
+    for (auto i = 0; i < memory_regions.size(); i++) {
+        memory_regions[i] = std::make_shared<MemoryRegionInfo>();
+    }
     MemoryInit(system_mode);
 
     resource_limits = std::make_unique<ResourceLimitList>(*this);
@@ -107,7 +110,7 @@ template <class Archive>
 void KernelSystem::serialize(Archive& ar, const unsigned int file_version) {
     ar& memory_regions;
     ar& named_ports;
-    ar&* current_cpu.get();
+    // current_cpu set externally
     // NB: subsystem references and prepare_reschedule_callback are constant
     ar&* resource_limits.get();
     ar& next_object_id;

src/core/hle/kernel/kernel.h

@@ -134,7 +134,8 @@ public:
      */
     ResultVal<std::shared_ptr<Thread>> CreateThread(std::string name, VAddr entry_point,
                                                     u32 priority, u32 arg, s32 processor_id,
-                                                    VAddr stack_top, std::shared_ptr<Process> owner_process);
+                                                    VAddr stack_top,
+                                                    std::shared_ptr<Process> owner_process);
 
     /**
      * Creates a semaphore.
@@ -232,11 +233,11 @@ 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);

src/core/hle/kernel/memory.cpp

@@ -49,9 +49,9 @@ void KernelSystem::MemoryInit(u32 mem_type) {
     // 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
@@ -63,20 +63,20 @@ void KernelSystem::MemoryInit(u32 mem_type) {
     // app_mem_malloc does not always match the configured size for memory_region[0]: in case the
     // n3DS type override is in effect it reports the size the game expects, not the real one.
     config_mem.app_mem_alloc = memory_region_sizes[mem_type][0];
-    config_mem.sys_mem_alloc = memory_regions[1].size;
-    config_mem.base_mem_alloc = memory_regions[2].size;
+    config_mem.sys_mem_alloc = memory_regions[1]->size;
+    config_mem.base_mem_alloc = memory_regions[2]->size;
 
     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();
     }

src/core/hle/kernel/process.h

@@ -200,7 +200,7 @@ public:
 
     u32 memory_used = 0;
 
-    MemoryRegionInfo* memory_region = nullptr;
+    std::shared_ptr<MemoryRegionInfo> memory_region = nullptr;
 
     /// The Thread Local Storage area is allocated as processes create threads,
     /// each TLS area is 0x200 bytes, so one page (0x1000) is split up in 8 parts, and each part

src/core/hle/kernel/shared_memory.cpp

@@ -42,7 +42,7 @@ ResultVal<std::shared_ptr<SharedMemory>> KernelSystem::CreateSharedMemory(
     if (address == 0) {
         // We need to allocate a block from the Linear Heap ourselves.
         // We'll manually allocate some memory from the linear heap in the specified region.
-        MemoryRegionInfo* memory_region = GetMemoryRegion(region);
+        auto memory_region = GetMemoryRegion(region);
         auto offset = memory_region->LinearAllocate(size);
 
         ASSERT_MSG(offset, "Not enough space in region to allocate shared memory!");
@@ -79,7 +79,7 @@ std::shared_ptr<SharedMemory> KernelSystem::CreateSharedMemoryForApplet(
     auto shared_memory{std::make_shared<SharedMemory>(*this)};
 
     // Allocate memory in heap
-    MemoryRegionInfo* memory_region = GetMemoryRegion(MemoryRegion::SYSTEM);
+    auto memory_region = GetMemoryRegion(MemoryRegion::SYSTEM);
     auto backing_blocks = memory_region->HeapAllocate(size);
     ASSERT_MSG(!backing_blocks.empty(), "Not enough space in region to allocate shared memory!");
     shared_memory->holding_memory = backing_blocks;

src/core/hle/kernel/thread.cpp

@@ -32,7 +32,7 @@ namespace Kernel {
 
 template <class Archive>
 void Thread::serialize(Archive& ar, const unsigned int file_version) {
-    ar& boost::serialization::base_object<Object>(*this);
+    ar& boost::serialization::base_object<WaitObject>(*this);
     ar&* context.get();
     ar& thread_id;
     ar& status;
@@ -363,7 +363,7 @@ ResultVal<std::shared_ptr<Thread>> KernelSystem::CreateThread(
     if (needs_allocation) {
         // There are no already-allocated pages with free slots, lets allocate a new one.
         // TLS pages are allocated from the BASE region in the linear heap.
-        MemoryRegionInfo* memory_region = GetMemoryRegion(MemoryRegion::BASE);
+        auto memory_region = GetMemoryRegion(MemoryRegion::BASE);
 
         // Allocate some memory from the end of the linear heap for this region.
         auto offset = memory_region->LinearAllocate(Memory::PAGE_SIZE);

src/core/hle/service/gsp/gsp_gpu.cpp

@@ -824,10 +824,6 @@ std::unique_ptr<Kernel::SessionRequestHandler::SessionDataBase> GSP_GPU::MakeSes
     return std::make_unique<SessionData>(this);
 }
 
-SessionData::SessionData() {
-    UNREACHABLE();
-}
-
 SessionData::SessionData(GSP_GPU* gsp) : gsp(gsp) {
     // Assign a new thread id to this session when it connects. Note: In the real GSP service this
     // is done through a real thread (svcCreateThread) but we have to simulate it since our HLE

src/core/hle/service/gsp/gsp_gpu.h

@@ -187,7 +187,7 @@ class GSP_GPU;
 
 class SessionData : public Kernel::SessionRequestHandler::SessionDataBase {
 public:
-    SessionData();
+    SessionData() = default;
     SessionData(GSP_GPU* gsp);
     ~SessionData();
 

src/core/hle/service/ldr_ro/ldr_ro.cpp

@@ -15,6 +15,7 @@
 
 SERVICE_CONSTRUCT_IMPL(Service::LDR::RO)
 SERIALIZE_EXPORT_IMPL(Service::LDR::RO)
+SERIALIZE_EXPORT_IMPL(Service::LDR::ClientSlot)
 
 namespace Service::LDR {