Core/ConfigManager: Add locks for metadata methods

All metadata access methods now acquire a lock on `m_metadata_lock` to prevent race conditions.

Source/Core/Core/ConfigManager.cpp

@@ -6,6 +6,7 @@
 #include <algorithm>
 #include <climits>
 #include <memory>
+#include <mutex>
 #include <optional>
 #include <sstream>
 #include <string>
@@ -98,14 +99,52 @@ void SConfig::LoadSettings()
   Config::Load();
 }
 
+const std::string SConfig::GetGameID() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_game_id;
+}
+
+const std::string SConfig::GetGameTDBID() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_gametdb_id;
+}
+
+const std::string SConfig::GetTitleName() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_title_name;
+}
+
+const std::string SConfig::GetTitleDescription() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_title_description;
+}
+
+u64 SConfig::GetTitleID() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_title_id;
+}
+
+u16 SConfig::GetRevision() const
+{
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
+  return m_revision;
+}
+
 void SConfig::ResetRunningGameMetadata()
 {
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   SetRunningGameMetadata("00000000", "", 0, 0, DiscIO::Region::Unknown);
 }
 
 void SConfig::SetRunningGameMetadata(const DiscIO::Volume& volume,
                                      const DiscIO::Partition& partition)
 {
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   if (partition == volume.GetGamePartition())
   {
     SetRunningGameMetadata(volume.GetGameID(), volume.GetGameTDBID(),
@@ -122,6 +161,7 @@ void SConfig::SetRunningGameMetadata(const DiscIO::Volume& volume,
 
 void SConfig::SetRunningGameMetadata(const IOS::ES::TMDReader& tmd, DiscIO::Platform platform)
 {
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   const u64 tmd_title_id = tmd.GetTitleId();
 
   // If we're launching a disc game, we want to read the revision from
@@ -139,12 +179,14 @@ void SConfig::SetRunningGameMetadata(const IOS::ES::TMDReader& tmd, DiscIO::Plat
 
 void SConfig::SetRunningGameMetadata(const std::string& game_id)
 {
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   SetRunningGameMetadata(game_id, "", 0, 0, DiscIO::Region::Unknown);
 }
 
 void SConfig::SetRunningGameMetadata(const std::string& game_id, const std::string& gametdb_id,
                                      u64 title_id, u16 revision, DiscIO::Region region)
 {
+  std::lock_guard<std::recursive_mutex> lock(m_metadata_lock);
   const bool was_changed = m_game_id != game_id || m_gametdb_id != gametdb_id ||
                            m_title_id != title_id || m_revision != revision;
   m_game_id = game_id;

Source/Core/Core/ConfigManager.h

@@ -4,6 +4,7 @@
 #pragma once
 
 #include <limits>
+#include <mutex>
 #include <optional>
 #include <set>
 #include <string>
@@ -58,15 +59,16 @@ struct SConfig
   std::string m_strSRAM;
 
   std::string m_debugger_game_id;
+
   // TODO: remove this as soon as the ticket view hack in IOS/ES/Views is dropped.
   bool m_disc_booted_from_game_list = false;
 
-  const std::string& GetGameID() const { return m_game_id; }
+  const std::string GetGameID() const;
-  const std::string& GetGameTDBID() const { return m_gametdb_id; }
+  const std::string GetGameTDBID() const;
-  const std::string& GetTitleName() const { return m_title_name; }
+  const std::string GetTitleName() const;
-  const std::string& GetTitleDescription() const { return m_title_description; }
+  const std::string GetTitleDescription() const;
-  u64 GetTitleID() const { return m_title_id; }
+  u64 GetTitleID() const;
-  u16 GetRevision() const { return m_revision; }
+  u16 GetRevision() const;
   void ResetRunningGameMetadata();
   void SetRunningGameMetadata(const DiscIO::Volume& volume, const DiscIO::Partition& partition);
   void SetRunningGameMetadata(const IOS::ES::TMDReader& tmd, DiscIO::Platform platform);
@@ -114,6 +116,7 @@ private:
                               u64 title_id, u16 revision, DiscIO::Region region);
 
   static SConfig* m_Instance;
+  mutable std::recursive_mutex m_metadata_lock;
 
   std::string m_game_id;
   std::string m_gametdb_id;