MemoryView auto updateDebugger. Implement base codetrace logic. Add register breakpoints. Add CodeViewWidget autostepping to track a value.Debugger

Source/Core/Common/Debug/CodeTrace.h

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+// Copyright 2022 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <optional>
+#include <set>
+#include <string>
+#include <vector>
+
+#include "Common/CommonTypes.h"
+
+struct InstructionAttributes
+{
+  u32 address = 0;
+  std::string instruction = "";
+  std::string reg0 = "";
+  std::string reg1 = "";
+  std::string reg2 = "";
+  std::string reg3 = "";
+  std::optional<u32> memory_target = std::nullopt;
+  u32 memory_target_size = 4;
+  bool is_store = false;
+  bool is_load = false;
+};
+
+struct TraceOutput
+{
+  u32 address;
+  std::optional<u32> memory_target = std::nullopt;
+  std::string instruction;
+};
+
+struct AutoStepResults
+{
+  std::vector<std::string> reg_tracked;
+  std::set<u32> mem_tracked;
+  u32 count = 0;
+  bool timed_out = false;
+  bool trackers_empty = false;
+};
+
+enum class HitType : u32
+{
+  SKIP = (1 << 0),       // Not a hit
+  OVERWRITE = (1 << 1),  // Tracked value gets overwritten by untracked. Typically skipped.
+  MOVED = (1 << 2),      // Target duplicated to another register, unchanged.
+  SAVELOAD = (1 << 3),   // Target saved or loaded. Priority over Pointer.
+  POINTER = (1 << 4),    // Target used as pointer/offset for save or load
+  PASSIVE = (1 << 5),    // Conditional, etc, but not pointer. Unchanged
+  ACTIVE = (1 << 6),     // Math, etc. Changed.
+  UPDATED = (1 << 7),    // Masked or math without changing register.
+};
+
+class CodeTrace
+{
+public:
+  enum class AutoStop
+  {
+    Always,
+    Used,
+    Changed
+  };
+
+  void SetRegTracked(const std::string& reg);
+  AutoStepResults AutoStepping(bool continue_previous = false, AutoStop stop_on = AutoStop::Always);
+
+private:
+  InstructionAttributes GetInstructionAttributes(const TraceOutput& line) const;
+  TraceOutput SaveCurrentInstruction() const;
+  HitType TraceLogic(const TraceOutput& current_instr, bool first_hit = false);
+
+  bool m_recording = false;
+  std::vector<std::string> m_reg_autotrack;
+  std::set<u32> m_mem_autotrack;
+};