core: Eliminate remaining usages of the global system instance

Removes all remaining usages of the global system instance. After this,
migration can begin to migrate to being constructed and managed entirely
by the various frontends.

src/core/CMakeLists.txt

@@ -135,8 +135,6 @@ add_library(core STATIC
     frontend/framebuffer_layout.cpp
     frontend/framebuffer_layout.h
     frontend/input.h
-    gdbstub/gdbstub.cpp
-    gdbstub/gdbstub.h
     hardware_interrupt_manager.cpp
     hardware_interrupt_manager.h
     hle/ipc.h

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -14,7 +14,6 @@
 #include "core/arm/dynarmic/arm_exclusive_monitor.h"
 #include "core/core.h"
 #include "core/core_timing.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hardware_properties.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/scheduler.h"
@@ -96,16 +95,6 @@ public:
         case Dynarmic::A64::Exception::Yield:
             return;
         case Dynarmic::A64::Exception::Breakpoint:
-            if (GDBStub::IsServerEnabled()) {
-                parent.jit->HaltExecution();
-                parent.SetPC(pc);
-                Kernel::Thread* const thread = parent.system.CurrentScheduler().GetCurrentThread();
-                parent.SaveContext(thread->GetContext64());
-                GDBStub::Break();
-                GDBStub::SendTrap(thread, 5);
-                return;
-            }
-            [[fallthrough]];
         default:
             ASSERT_MSG(false, "ExceptionRaised(exception = {}, pc = {:08X}, code = {:08X})",
                        static_cast<std::size_t>(exception), pc, MemoryReadCode(pc));

src/core/core.cpp

@@ -25,7 +25,6 @@
 #include "core/file_sys/sdmc_factory.h"
 #include "core/file_sys/vfs_concat.h"
 #include "core/file_sys/vfs_real.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hardware_interrupt_manager.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/kernel.h"
@@ -186,11 +185,8 @@ struct System::Impl {
         }
 
         service_manager = std::make_shared<Service::SM::ServiceManager>(kernel);
-
         services = std::make_unique<Service::Services>(service_manager, system);
-        GDBStub::DeferStart();
-
-        interrupt_manager = std::make_unique<Core::Hardware::InterruptManager>(system);
+        interrupt_manager = std::make_unique<Hardware::InterruptManager>(system);
 
         // Initialize time manager, which must happen after kernel is created
         time_manager.Initialize();
@@ -297,7 +293,6 @@ struct System::Impl {
         }
 
         // Shutdown emulation session
-        GDBStub::Shutdown();
         services.reset();
         service_manager.reset();
         cheat_engine.reset();

src/core/cpu_manager.cpp

@@ -10,7 +10,6 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/cpu_manager.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/physical_core.h"
 #include "core/hle/kernel/scheduler.h"

src/core/gdbstub/gdbstub.h

@@ -1,114 +0,0 @@
-// Copyright 2013 Dolphin Emulator Project
-// Licensed under GPLv2+
-// Refer to the license.txt file included.
-
-// Originally written by Sven Peter <sven@fail0verflow.com> for anergistic.
-
-#pragma once
-
-#include <string>
-#include "common/common_types.h"
-#include "core/hle/kernel/thread.h"
-
-namespace GDBStub {
-
-/// Breakpoint Method
-enum class BreakpointType {
-    None,    ///< None
-    Execute, ///< Execution Breakpoint
-    Read,    ///< Read Breakpoint
-    Write,   ///< Write Breakpoint
-    Access   ///< Access (R/W) Breakpoint
-};
-
-struct BreakpointAddress {
-    VAddr address;
-    BreakpointType type;
-};
-
-/**
- * Set the port the gdbstub should use to listen for connections.
- *
- * @param port Port to listen for connection
- */
-void SetServerPort(u16 port);
-
-/**
- * Starts or stops the server if possible.
- *
- * @param status Set the server to enabled or disabled.
- */
-void ToggleServer(bool status);
-
-/// Start the gdbstub server.
-void Init();
-
-/**
- * Defer initialization of the gdbstub to the first packet processing functions.
- * This avoids a case where the gdbstub thread is frozen after initialization
- * and fails to respond in time to packets.
- */
-void DeferStart();
-
-/// Stop gdbstub server.
-void Shutdown();
-
-/// Checks if the gdbstub server is enabled.
-bool IsServerEnabled();
-
-/// Returns true if there is an active socket connection.
-bool IsConnected();
-
-/// Register module.
-void RegisterModule(std::string name, VAddr beg, VAddr end, bool add_elf_ext = true);
-
-/**
- * Signal to the gdbstub server that it should halt CPU execution.
- *
- * @param is_memory_break If true, the break resulted from a memory breakpoint.
- */
-void Break(bool is_memory_break = false);
-
-/// Determine if there was a memory breakpoint.
-bool IsMemoryBreak();
-
-/// Read and handle packet from gdb client.
-void HandlePacket();
-
-/**
- * Get the nearest breakpoint of the specified type at the given address.
- *
- * @param addr Address to search from.
- * @param type Type of breakpoint.
- */
-BreakpointAddress GetNextBreakpointFromAddress(VAddr addr, GDBStub::BreakpointType type);
-
-/**
- * Check if a breakpoint of the specified type exists at the given address.
- *
- * @param addr Address of breakpoint.
- * @param type Type of breakpoint.
- */
-bool CheckBreakpoint(VAddr addr, GDBStub::BreakpointType type);
-
-/// If set to true, the CPU will halt at the beginning of the next CPU loop.
-bool GetCpuHaltFlag();
-
-/// If set to true and the CPU is halted, the CPU will step one instruction.
-bool GetCpuStepFlag();
-
-/**
- * When set to true, the CPU will step one instruction when the CPU is halted next.
- *
- * @param is_step
- */
-void SetCpuStepFlag(bool is_step);
-
-/**
- * Send trap signal from thread back to the gdbstub server.
- *
- * @param thread Sending thread.
- * @param trap Trap no.
- */
-void SendTrap(Kernel::Thread* thread, int trap);
-} // namespace GDBStub

src/core/loader/deconstructed_rom_directory.cpp

@@ -12,7 +12,6 @@
 #include "core/file_sys/control_metadata.h"
 #include "core/file_sys/patch_manager.h"
 #include "core/file_sys/romfs_factory.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
@@ -180,8 +179,6 @@ AppLoader_DeconstructedRomDirectory::LoadResult AppLoader_DeconstructedRomDirect
         next_load_addr = *tentative_next_load_addr;
         modules.insert_or_assign(load_addr, module);
         LOG_DEBUG(Loader, "loaded module {} @ 0x{:X}", module, load_addr);
-        // Register module with GDBStub
-        GDBStub::RegisterModule(module, load_addr, next_load_addr - 1, false);
     }
 
     // Find the RomFS by searching for a ".romfs" file in this directory

src/core/loader/kip.cpp

@@ -5,7 +5,6 @@
 #include <cstring>
 #include "core/file_sys/kernel_executable.h"
 #include "core/file_sys/program_metadata.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
@@ -91,8 +90,6 @@ AppLoader::LoadResult AppLoader_KIP::Load(Kernel::Process& process,
     program_image.resize(PageAlignSize(kip->GetBSSOffset()) + kip->GetBSSSize());
     codeset.DataSegment().size += kip->GetBSSSize();
 
-    GDBStub::RegisterModule(kip->GetName(), base_address, base_address + program_image.size());
-
     codeset.memory = std::move(program_image);
     process.LoadModule(std::move(codeset), base_address);
 

src/core/loader/nro.cpp

@@ -14,10 +14,10 @@
 #include "core/file_sys/control_metadata.h"
 #include "core/file_sys/romfs_factory.h"
 #include "core/file_sys/vfs_offset.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
+#include "core/hle/kernel/thread.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/loader/nro.h"
 #include "core/loader/nso.h"
@@ -197,10 +197,6 @@ static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data,
     codeset.memory = std::move(program_image);
     process.LoadModule(std::move(codeset), process.PageTable().GetCodeRegionStart());
 
-    // Register module with GDBStub
-    GDBStub::RegisterModule(name, process.PageTable().GetCodeRegionStart(),
-                            process.PageTable().GetCodeRegionEnd());
-
     return true;
 }
 

src/core/loader/nso.cpp

@@ -14,10 +14,10 @@
 #include "common/swap.h"
 #include "core/core.h"
 #include "core/file_sys/patch_manager.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
 #include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
+#include "core/hle/kernel/thread.h"
 #include "core/loader/nso.h"
 #include "core/memory.h"
 #include "core/settings.h"
@@ -159,9 +159,6 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process, Core::S
     codeset.memory = std::move(program_image);
     process.LoadModule(std::move(codeset), load_base);
 
-    // Register module with GDBStub
-    GDBStub::RegisterModule(file.GetName(), load_base, load_base);
-
     return load_base + image_size;
 }
 

src/core/settings.cpp

@@ -4,9 +4,10 @@
 
 #include <string_view>
 
+#include "common/assert.h"
 #include "common/file_util.h"
+#include "common/logging/log.h"
 #include "core/core.h"
-#include "core/gdbstub/gdbstub.h"
 #include "core/hle/service/hid/hid.h"
 #include "core/settings.h"
 #include "video_core/renderer_base.h"
@@ -31,13 +32,9 @@ std::string GetTimeZoneString() {
     return timezones[time_zone_index];
 }
 
-void Apply() {
-    GDBStub::SetServerPort(values.gdbstub_port);
-    GDBStub::ToggleServer(values.use_gdbstub);
-
-    auto& system_instance = Core::System::GetInstance();
-    if (system_instance.IsPoweredOn()) {
-        system_instance.Renderer().RefreshBaseSettings();
+void Apply(Core::System& system) {
+    if (system.IsPoweredOn()) {
+        system.Renderer().RefreshBaseSettings();
     }
 
     Service::HID::ReloadInputDevices();
@@ -106,9 +103,9 @@ float Volume() {
     return values.volume.GetValue();
 }
 
-void RestoreGlobalState() {
+void RestoreGlobalState(bool is_powered_on) {
     // If a game is running, DO NOT restore the global settings state
-    if (Core::System::GetInstance().IsPoweredOn()) {
+    if (is_powered_on) {
         return;
     }
 

src/core/settings.h

@@ -14,6 +14,10 @@
 #include "common/common_types.h"
 #include "input_common/settings.h"
 
+namespace Core {
+class System;
+}
+
 namespace Settings {
 
 enum class RendererBackend {
@@ -247,11 +251,11 @@ float Volume();
 
 std::string GetTimeZoneString();
 
-void Apply();
+void Apply(Core::System& system);
 void LogSettings();
 
 // Restore the global state of all applicable settings in the Values struct
-void RestoreGlobalState();
+void RestoreGlobalState(bool is_powered_on);
 
 // Fixes settings that are known to cause issues with the emulator
 void Sanitize();