Start work on a debug view

src/backend/core/BaseCPU.hpp

@@ -12,6 +12,6 @@ struct BaseCPU {
   virtual void Deserialize(const std::vector<u8> &) = 0;
   virtual Mem &GetMem() = 0;
   virtual Registers &GetRegs() = 0;
-  [[nodiscard]] virtual Disassembler::DisassemblyResult Disassemble(u32, u32) const = 0;
+  [[nodiscard]] virtual Disassembler::DisassemblyResult Disassemble(u32) = 0;
 };
 } // namespace n64

src/backend/core/Disassembler.hpp

@@ -13,7 +13,7 @@ struct Disassembler {
     std::array<std::string, 3> ops{};
   };
 
-  static Disassembler &instance(bool rsp = false) {
+  static Disassembler &GetInstance(bool rsp = false) {
     static Disassembler ret(rsp);
     return ret;
   }

src/backend/core/Interpreter.cpp

@@ -21,8 +21,12 @@ void Interpreter::CheckCompareInterrupt() {
   }
 }
 
-Disassembler::DisassemblyResult Interpreter::Disassemble(const u32 address, const u32 instruction) const {
-  return Disassembler::instance().Disassemble(address, instruction);
+Disassembler::DisassemblyResult Interpreter::Disassemble(const u32 address) {
+  u32 paddr;
+  if (!regs.cop0.MapVAddr(Cop0::LOAD, address, paddr)) {
+    return {};
+  }
+  return Disassembler::GetInstance().Disassemble(address, mem.Read<u32>(regs, paddr));
 }
 
 int Interpreter::Step() {

src/backend/core/Interpreter.hpp

@@ -20,7 +20,7 @@ struct Interpreter : BaseCPU {
   Mem &GetMem() override { return mem; }
 
   Registers &GetRegs() override { return regs; }
-  [[nodiscard]] Disassembler::DisassemblyResult Disassemble(u32, u32) const override;
+  [[nodiscard]] Disassembler::DisassemblyResult Disassemble(u32) override;
 
 private:
   Registers regs;

src/backend/core/JIT.hpp

@@ -40,7 +40,7 @@ struct JIT : BaseCPU {
 
   Registers &GetRegs() override { return regs; }
 
-  [[nodiscard]] Disassembler::DisassemblyResult Disassemble(u32, u32) const override { return {}; }
+  [[nodiscard]] Disassembler::DisassemblyResult Disassemble(u32) override { return {}; }
 
 private:
   Xbyak::CodeGenerator code{kCodeCacheAllocSize};

src/frontend/Debugger.cpp

@@ -1,23 +1,69 @@
 #include <Debugger.hpp>
+#include <imgui.h>
+#include <execution>
 
-Debugger::Debugger() {
-  /*
-  disassembly->setWindowTitle("Disassembly");
-  disassembly->setFeatures(QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetMovable);
-  codeView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
-  codeView->setHeaderHidden(true);
-  codeView->setModel(codeModel.get());
-  cpuState->setWindowTitle("Registers");
-  cpuState->setFeatures(QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetMovable);
-  registers->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+bool Debugger::render() {
+  if(enabled && ImGui::Begin("Debugger", &enabled)) {
+    static u64 startAddr = 0xFFFF'FFFF'8000'0000;
+    static constexpr int addrStep = 4;
+    static bool followPC = false;
+    ImGui::BeginDisabled(followPC);
+    ImGui::InputScalar("Address", ImGuiDataType_U64, &startAddr, &addrStep, nullptr, "%016lX", ImGuiInputTextFlags_CharsHexadecimal);
+    ImGui::EndDisabled();
+    ImGui::SameLine();
+    ImGui::Checkbox("Follow program counter:", &followPC);
+    if(followPC)
+      startAddr = core->cpu->GetRegs().oldPC - 64; // TODO: arbitrary???
 
-  horLayout->addWidget(disassembly.get());
-  horLayout->addWidget(cpuState.get());
+    if(ImGui::BeginTable("Disassembly", 3, ImGuiTableFlags_RowBg)) {
+      ImGui::TableSetupColumn("Address");
+      ImGui::TableSetupColumn("Mnemonic");
+      ImGui::TableSetupColumn("Comment");
+      ImGui::TableHeadersRow();
 
-  verLayout->addLayout(horLayout.get());
-
-  setLayout(verLayout.get());
-
-  // connect(codeView.get(), &QTreeView::activated, this, );
-  */
+      for(u64 addr = startAddr; addr < startAddr + MAX_LINES_OF_DISASM * sizeof(u32); addr += sizeof(u32)) {
+        auto disasm = core->cpu->Disassemble(addr);
+        std::string op_str;
+        for(int i = 0; i < 3; i++) {
+          if(i < 2) {
+            if(!disasm.ops[i].empty()) {
+              op_str += disasm.ops[i];
+              if(!disasm.ops[i+1].empty()) op_str += ", ";
+            }              
+          } else {
+            if(!disasm.ops[i].empty()) op_str += disasm.ops[i];
+          }
+        }
+        auto isPc = addr == core->cpu->GetRegs().oldPC;
+        if(isPc) {
+          ImGui::PushStyleColor(ImGuiCol_TableRowBg, 0x809a9ade);
+          ImGui::PushStyleColor(ImGuiCol_TableRowBgAlt, 0x807777bf);
+        }
+        ImGui::TableNextRow();
+        if(disasm.success) {
+          ImGui::TableSetColumnIndex(0);
+          ImGui::TextColored(ImColor(0xffeaefb6), "%s", std::format("{:016X}:", disasm.address).c_str());
+          ImGui::TableSetColumnIndex(1);
+          ImGui::TextColored(ImColor(0xffcbf1ae), "%s", std::format("{} {}", disasm.mnemonic, op_str).c_str());
+          ImGui::TableSetColumnIndex(2);
+          ImGui::TextColored(ImColor(0xff71efe5), "%s", std::format("{}", "// no comments for now!").c_str());
+        } else {
+          ImGui::TableSetColumnIndex(0);
+          ImGui::TextColored(ImColor(0xffeaefb6), "????????????????");
+          ImGui::TableSetColumnIndex(1);
+          ImGui::TextColored(ImColor(0xffcbf1ae), "Disassembly unsuccessful...");
+          ImGui::TableSetColumnIndex(2);
+          ImGui::TextColored(ImColor(0xff71efe5), "");
+        }
+        if(isPc) {
+          ImGui::PopStyleColor();
+          ImGui::PopStyleColor();
+        }
+      }
+      ImGui::EndTable();
+    }
+    ImGui::End();
+  }
+
+  return true;
 }

src/frontend/Debugger.hpp

@@ -1,7 +1,13 @@
 #pragma once
+#include <backend/Core.hpp>
 
 class Debugger final {
-
+  std::shared_ptr<n64::Core> core;
+  bool enabled = false;
+  static constexpr auto MAX_LINES_OF_DISASM = 150;
 public:
-  Debugger();
+  Debugger(const std::shared_ptr<n64::Core>& core) : core(core) { }
+  void Open() { enabled = true; }
+  void Close() { enabled = false; }
+  bool render();
 };

src/frontend/KaizenGui.cpp

@@ -4,7 +4,7 @@
 #include <ImGuiImpl/StatusBar.hpp>
 #include <resources/gamecontrollerdb.h>
 
-KaizenGui::KaizenGui() noexcept : window("Kaizen", 800, 600), settingsWindow(window), core(std::make_shared<n64::Core>(static_cast<n64::Core::CPUType>(settingsWindow.cpuSettings.GetCPUType()))), vulkanWidget(core, window.getHandle()), emuThread(core, fpsCounter, vulkanWidget, settingsWindow) {  
+KaizenGui::KaizenGui() noexcept : window("Kaizen", 800, 600), settingsWindow(window), core(std::make_shared<n64::Core>(static_cast<n64::Core::CPUType>(settingsWindow.cpuSettings.GetCPUType()))), vulkanWidget(core, window.getHandle()), emuThread(core, fpsCounter, vulkanWidget, settingsWindow), debugger(core) {
   gui::Initialize(core->parallel.wsi, window.getHandle());
   SDL_InitSubSystem(SDL_INIT_GAMEPAD);
 
@@ -167,6 +167,10 @@ void KaizenGui::RenderUI() {
         core->parallel.SetFramerateUnlocked(unlockFramerate);
       }
 
+      if(ImGui::MenuItem("Open Debugger")) {
+        debugger.Open();
+      }
+
       ImGui::EndDisabled();
 
       if(ImGui::MenuItem("Options")) {
@@ -193,6 +197,7 @@ void KaizenGui::RenderUI() {
   }
 
   settingsWindow.render();
+  debugger.render();
 
   ImVec2 center = ImGui::GetMainViewport()->GetCenter();
   ImGui::SetNextWindowPos(center, ImGuiCond_Appearing, ImVec2(0.5f, 0.5f));

src/frontend/KaizenGui.hpp

@@ -19,6 +19,7 @@ public:
   std::shared_ptr<n64::Core> core;
   RenderWidget vulkanWidget;
   EmuThread emuThread;
+  Debugger debugger;
 
   SDL_Gamepad* gamepad = nullptr;