Merge pull request #13446 from JosJuice/breakpoints-delayed-update

PowerPC: Add RAII handling for breakpoint updates

Source/Core/Core/PowerPC/BreakPoints.cpp

@@ -252,6 +252,7 @@ MemChecks::TMemChecksStr MemChecks::GetStrings() const
 void MemChecks::AddFromStrings(const TMemChecksStr& mc_strings)
 {
   const Core::CPUThreadGuard guard(m_system);
+  DelayedMemCheckUpdate delayed_update(this);
 
   for (const std::string& mc_string : mc_strings)
   {
@@ -279,13 +280,11 @@ void MemChecks::AddFromStrings(const TMemChecksStr& mc_strings)
       mc.condition = Expression::TryParse(condition);
     }
 
-    Add(std::move(mc), false);
+    delayed_update |= Add(std::move(mc));
   }
-
-  Update();
 }
 
-void MemChecks::Add(TMemCheck memory_check, bool update)
+DelayedMemCheckUpdate MemChecks::Add(TMemCheck memory_check)
 {
   const Core::CPUThreadGuard guard(m_system);
 
@@ -304,8 +303,7 @@ void MemChecks::Add(TMemCheck memory_check, bool update)
     m_mem_checks.emplace_back(std::move(memory_check));
   }
 
-  if (update)
+  return DelayedMemCheckUpdate(this, true);
-    Update();
 }
 
 bool MemChecks::ToggleEnable(u32 address)
@@ -319,20 +317,17 @@ bool MemChecks::ToggleEnable(u32 address)
   return true;
 }
 
-bool MemChecks::Remove(u32 address, bool update)
+DelayedMemCheckUpdate MemChecks::Remove(u32 address)
 {
   const auto iter = std::ranges::find(m_mem_checks, address, &TMemCheck::start_address);
 
   if (iter == m_mem_checks.cend())
-    return false;
+    return DelayedMemCheckUpdate(this, false);
 
   const Core::CPUThreadGuard guard(m_system);
   m_mem_checks.erase(iter);
 
-  if (update)
+  return DelayedMemCheckUpdate(this, true);
-    Update();
-
-  return true;
 }
 
 void MemChecks::Clear()

Source/Core/Core/PowerPC/BreakPoints.h

@@ -97,6 +97,8 @@ private:
   Core::System& m_system;
 };
 
+class DelayedMemCheckUpdate;
+
 // Memory breakpoints
 class MemChecks
 {
@@ -115,13 +117,13 @@ public:
   TMemChecksStr GetStrings() const;
   void AddFromStrings(const TMemChecksStr& mc_strings);
 
-  void Add(TMemCheck memory_check, bool update = true);
+  DelayedMemCheckUpdate Add(TMemCheck memory_check);
 
   bool ToggleEnable(u32 address);
 
   TMemCheck* GetMemCheck(u32 address, size_t size = 1);
   bool OverlapsMemcheck(u32 address, u32 length) const;
-  bool Remove(u32 address, bool update = true);
+  DelayedMemCheckUpdate Remove(u32 address);
 
   void Update();
   void Clear();
@@ -132,3 +134,39 @@ private:
   Core::System& m_system;
   bool m_mem_breakpoints_set = false;
 };
+
+class DelayedMemCheckUpdate final
+{
+public:
+  DelayedMemCheckUpdate(MemChecks* memchecks, bool update_needed = false)
+      : m_memchecks(memchecks), m_update_needed(update_needed)
+  {
+  }
+
+  DelayedMemCheckUpdate(const DelayedMemCheckUpdate&) = delete;
+  DelayedMemCheckUpdate(DelayedMemCheckUpdate&& other) = delete;
+  DelayedMemCheckUpdate& operator=(const DelayedMemCheckUpdate&) = delete;
+  DelayedMemCheckUpdate& operator=(DelayedMemCheckUpdate&& other) = delete;
+
+  ~DelayedMemCheckUpdate()
+  {
+    if (m_update_needed)
+      m_memchecks->Update();
+  }
+
+  DelayedMemCheckUpdate& operator|=(DelayedMemCheckUpdate&& other)
+  {
+    if (m_memchecks == other.m_memchecks)
+    {
+      m_update_needed |= other.m_update_needed;
+      other.m_update_needed = false;
+    }
+    return *this;
+  }
+
+  operator bool() const { return m_update_needed; }
+
+private:
+  MemChecks* m_memchecks;
+  bool m_update_needed;
+};

Source/Core/Core/PowerPC/GDBStub.cpp

@@ -172,12 +172,12 @@ static void RemoveBreakpoint(BreakpointType type, u32 addr, u32 len)
   else
   {
     auto& memchecks = Core::System::GetInstance().GetPowerPC().GetMemChecks();
+    DelayedMemCheckUpdate delayed_update(&memchecks);
     while (memchecks.GetMemCheck(addr, len) != nullptr)
     {
-      memchecks.Remove(addr, false);
+      delayed_update |= memchecks.Remove(addr);
       INFO_LOG_FMT(GDB_STUB, "gdb: removed a memcheck: {:08x} bytes at {:08x}", len, addr);
     }
-    memchecks.Update();
   }
   Host_PPCBreakpointsChanged();
 }

Source/Core/DolphinQt/Debugger/MemoryViewWidget.cpp

@@ -1010,6 +1010,7 @@ void MemoryViewWidget::ToggleBreakpoint(u32 addr, bool row)
 
   {
     const Core::CPUThreadGuard guard(m_system);
+    DelayedMemCheckUpdate delayed_update(&memchecks);
 
     for (int i = 0; i < breaks; i++)
     {
@@ -1028,16 +1029,14 @@ void MemoryViewWidget::ToggleBreakpoint(u32 addr, bool row)
         check.log_on_hit = m_do_log;
         check.break_on_hit = true;
 
-        memchecks.Add(std::move(check), false);
+        delayed_update |= memchecks.Add(std::move(check));
       }
       else if (check_ptr != nullptr)
       {
         // Using the pointer fixes misaligned breakpoints (0x11 breakpoint in 0x10 aligned view).
-        memchecks.Remove(check_ptr->start_address, false);
+        delayed_update |= memchecks.Remove(check_ptr->start_address);
       }
     }
-
-    memchecks.Update();
   }
 
   emit Host::GetInstance()->PPCBreakpointsChanged();