file_sys/cheat_engine: Remove use of global system accessors

Instead, pass in the core timing instance and make the dependency
explicit in the interface.

src/core/core.cpp

@@ -460,8 +460,8 @@ Tegra::DebugContext* System::GetGPUDebugContext() const {
 void System::RegisterCheatList(const std::vector<FileSys::CheatList>& list,
                                const std::string& build_id, VAddr code_region_start,
                                VAddr code_region_end) {
-    impl->cheat_engine =
-        std::make_unique<FileSys::CheatEngine>(list, build_id, code_region_start, code_region_end);
+    impl->cheat_engine = std::make_unique<FileSys::CheatEngine>(*this, list, build_id,
+                                                                code_region_start, code_region_end);
 }
 
 void System::SetFilesystem(std::shared_ptr<FileSys::VfsFilesystem> vfs) {

src/core/file_sys/cheat_engine.cpp

@@ -11,7 +11,6 @@
 #include "core/core_timing_util.h"
 #include "core/file_sys/cheat_engine.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/service/hid/controllers/controller_base.h"
 #include "core/hle/service/hid/controllers/npad.h"
 #include "core/hle/service/hid/hid.h"
 #include "core/hle/service/sm/sm.h"
@@ -77,8 +76,8 @@ void CheatList::Execute() {
     }
 }
 
-CheatList::CheatList(ProgramSegment master, ProgramSegment standard)
-    : master_list(master), standard_list(standard) {}
+CheatList::CheatList(const Core::System& system_, ProgramSegment master, ProgramSegment standard)
+    : master_list{std::move(master)}, standard_list{std::move(standard)}, system{&system_} {}
 
 bool CheatList::EvaluateConditional(const Cheat& cheat) const {
     using ComparisonFunction = bool (*)(u64, u64);
@@ -89,10 +88,8 @@ bool CheatList::EvaluateConditional(const Cheat& cheat) const {
     };
 
     if (cheat.type == CodeType::ConditionalInput) {
-        const auto applet_resource = Core::System::GetInstance()
-                                         .ServiceManager()
-                                         .GetService<Service::HID::Hid>("hid")
-                                         ->GetAppletResource();
+        const auto applet_resource =
+            system->ServiceManager().GetService<Service::HID::Hid>("hid")->GetAppletResource();
         if (applet_resource == nullptr) {
             LOG_WARNING(
                 Common_Filesystem,
@@ -320,14 +317,14 @@ void CheatList::ExecuteBlock(const Block& block) {
 
 CheatParser::~CheatParser() = default;
 
-CheatList CheatParser::MakeCheatList(CheatList::ProgramSegment master,
+CheatList CheatParser::MakeCheatList(const Core::System& system, CheatList::ProgramSegment master,
                                      CheatList::ProgramSegment standard) const {
-    return {master, standard};
+    return {system, std::move(master), std::move(standard)};
 }
 
 TextCheatParser::~TextCheatParser() = default;
 
-CheatList TextCheatParser::Parse(const std::vector<u8>& data) const {
+CheatList TextCheatParser::Parse(const Core::System& system, const std::vector<u8>& data) const {
     std::stringstream ss;
     ss.write(reinterpret_cast<const char*>(data.data()), data.size());
 
@@ -375,7 +372,7 @@ CheatList TextCheatParser::Parse(const std::vector<u8>& data) const {
         }
     }
 
-    return MakeCheatList(master_list, standard_list);
+    return MakeCheatList(system, master_list, standard_list);
 }
 
 std::array<u8, 16> TextCheatParser::ParseSingleLineCheat(const std::string& line) const {
@@ -460,16 +457,16 @@ void MemoryWriteImpl(u32 width, VAddr addr, u64 value) {
     }
 }
 
-CheatEngine::CheatEngine(std::vector<CheatList> cheats, const std::string& build_id,
-                         VAddr code_region_start, VAddr code_region_end)
-    : cheats(std::move(cheats)) {
-    auto& core_timing{Core::System::GetInstance().CoreTiming()};
+CheatEngine::CheatEngine(Core::System& system, std::vector<CheatList> cheats_,
+                         const std::string& build_id, VAddr code_region_start,
+                         VAddr code_region_end)
+    : cheats{std::move(cheats_)}, core_timing{system.CoreTiming()} {
     event = core_timing.RegisterEvent(
         "CheatEngine::FrameCallback::" + build_id,
         [this](u64 userdata, s64 cycles_late) { FrameCallback(userdata, cycles_late); });
     core_timing.ScheduleEvent(CHEAT_ENGINE_TICKS, event);
 
-    const auto& vm_manager = Core::System::GetInstance().CurrentProcess()->VMManager();
+    const auto& vm_manager = system.CurrentProcess()->VMManager();
     for (auto& list : this->cheats) {
         list.SetMemoryParameters(code_region_start, vm_manager.GetHeapRegionBaseAddress(),
                                  code_region_end, vm_manager.GetHeapRegionEndAddress(),
@@ -478,15 +475,14 @@ CheatEngine::CheatEngine(std::vector<CheatList> cheats, const std::string& build
 }
 
 CheatEngine::~CheatEngine() {
-    auto& core_timing{Core::System::GetInstance().CoreTiming()};
     core_timing.UnscheduleEvent(event, 0);
 }
 
 void CheatEngine::FrameCallback(u64 userdata, int cycles_late) {
-    for (auto& list : cheats)
+    for (auto& list : cheats) {
         list.Execute();
+    }
 
-    auto& core_timing{Core::System::GetInstance().CoreTiming()};
     core_timing.ScheduleEvent(CHEAT_ENGINE_TICKS - cycles_late, event);
 }
 

src/core/file_sys/cheat_engine.h

@@ -7,14 +7,18 @@
 #include <map>
 #include <set>
 #include <vector>
-#include <queue>
 #include "common/bit_field.h"
 #include "common/common_types.h"
 
-namespace Core::Timing {
-struct EventType;
+namespace Core {
+class System;
 }
 
+namespace Core::Timing {
+class CoreTiming;
+struct EventType;
+} // namespace Core::Timing
+
 namespace FileSys {
 
 enum class CodeType : u32 {
@@ -133,7 +137,7 @@ public:
     void Execute();
 
 private:
-    CheatList(ProgramSegment master, ProgramSegment standard);
+    CheatList(const Core::System& system_, ProgramSegment master, ProgramSegment standard);
 
     void ProcessBlockPairs(const Block& block);
     void ExecuteSingleCheat(const Cheat& cheat);
@@ -183,6 +187,8 @@ private:
     std::map<u64, u64> block_pairs;
 
     std::set<u64> encountered_loops;
+
+    const Core::System* system;
 };
 
 // Intermediary class that parses a text file or other disk format for storing cheats into a
@@ -191,10 +197,10 @@ class CheatParser {
 public:
     virtual ~CheatParser();
 
-    virtual CheatList Parse(const std::vector<u8>& data) const = 0;
+    virtual CheatList Parse(const Core::System& system, const std::vector<u8>& data) const = 0;
 
 protected:
-    CheatList MakeCheatList(CheatList::ProgramSegment master,
+    CheatList MakeCheatList(const Core::System& system_, CheatList::ProgramSegment master,
                             CheatList::ProgramSegment standard) const;
 };
 
@@ -203,7 +209,7 @@ class TextCheatParser final : public CheatParser {
 public:
     ~TextCheatParser() override;
 
-    CheatList Parse(const std::vector<u8>& data) const override;
+    CheatList Parse(const Core::System& system, const std::vector<u8>& data) const override;
 
 private:
     std::array<u8, 16> ParseSingleLineCheat(const std::string& line) const;
@@ -212,16 +218,17 @@ private:
 // Class that encapsulates a CheatList and manages its interaction with memory and CoreTiming
 class CheatEngine final {
 public:
-    CheatEngine(std::vector<CheatList> cheats, const std::string& build_id, VAddr code_region_start,
-                VAddr code_region_end);
+    CheatEngine(Core::System& system_, std::vector<CheatList> cheats_, const std::string& build_id,
+                VAddr code_region_start, VAddr code_region_end);
     ~CheatEngine();
 
 private:
     void FrameCallback(u64 userdata, int cycles_late);
 
-    Core::Timing::EventType* event;
-
     std::vector<CheatList> cheats;
+
+    Core::Timing::EventType* event;
+    Core::Timing::CoreTiming& core_timing;
 };
 
 } // namespace FileSys

src/core/file_sys/patch_manager.cpp

@@ -233,7 +233,7 @@ bool PatchManager::HasNSOPatch(const std::array<u8, 32>& build_id_) const {
     return !CollectPatches(patch_dirs, build_id).empty();
 }
 
-static std::optional<CheatList> ReadCheatFileFromFolder(u64 title_id,
+static std::optional<CheatList> ReadCheatFileFromFolder(const Core::System& system, u64 title_id,
                                                         const std::array<u8, 0x20>& build_id_,
                                                         const VirtualDir& base_path, bool upper) {
     const auto build_id_raw = Common::HexArrayToString(build_id_, upper);
@@ -254,28 +254,28 @@ static std::optional<CheatList> ReadCheatFileFromFolder(u64 title_id,
     }
 
     TextCheatParser parser;
-    return parser.Parse(data);
+    return parser.Parse(system, data);
 }
 
-std::vector<CheatList> PatchManager::CreateCheatList(const std::array<u8, 32>& build_id_) const {
-    std::vector<CheatList> out;
-
+std::vector<CheatList> PatchManager::CreateCheatList(const Core::System& system,
+                                                     const std::array<u8, 32>& build_id_) const {
     const auto load_dir = Service::FileSystem::GetModificationLoadRoot(title_id);
     auto patch_dirs = load_dir->GetSubdirectories();
     std::sort(patch_dirs.begin(), patch_dirs.end(),
               [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
 
+    std::vector<CheatList> out;
     out.reserve(patch_dirs.size());
     for (const auto& subdir : patch_dirs) {
         auto cheats_dir = subdir->GetSubdirectory("cheats");
         if (cheats_dir != nullptr) {
-            auto res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, true);
+            auto res = ReadCheatFileFromFolder(system, title_id, build_id_, cheats_dir, true);
             if (res.has_value()) {
                 out.push_back(std::move(*res));
                 continue;
             }
 
-            res = ReadCheatFileFromFolder(title_id, build_id_, cheats_dir, false);
+            res = ReadCheatFileFromFolder(system, title_id, build_id_, cheats_dir, false);
             if (res.has_value())
                 out.push_back(std::move(*res));
         }

src/core/file_sys/patch_manager.h

@@ -12,6 +12,10 @@
 #include "core/file_sys/nca_metadata.h"
 #include "core/file_sys/vfs.h"
 
+namespace Core {
+class System;
+}
+
 namespace FileSys {
 
 class NCA;
@@ -47,7 +51,8 @@ public:
     bool HasNSOPatch(const std::array<u8, 0x20>& build_id) const;
 
     // Creates a CheatList object with all
-    std::vector<CheatList> CreateCheatList(const std::array<u8, 0x20>& build_id) const;
+    std::vector<CheatList> CreateCheatList(const Core::System& system,
+                                           const std::array<u8, 0x20>& build_id) const;
 
     // Currently tracked RomFS patches:
     // - Game Updates

src/core/loader/nso.cpp

@@ -169,11 +169,11 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
 
     // Apply cheats if they exist and the program has a valid title ID
     if (pm) {
-        const auto cheats = pm->CreateCheatList(nso_header.build_id);
+        auto& system = Core::System::GetInstance();
+        const auto cheats = pm->CreateCheatList(system, nso_header.build_id);
         if (!cheats.empty()) {
-            Core::System::GetInstance().RegisterCheatList(
-                cheats, Common::HexArrayToString(nso_header.build_id), load_base,
-                load_base + program_image.size());
+            system.RegisterCheatList(cheats, Common::HexArrayToString(nso_header.build_id),
+                                     load_base, load_base + program_image.size());
         }
     }