pass over pre-emptive debug info conversion heuristic, to be friendlier to ue-style root project directories, with what feels like 1000s and 1000s of sub-directories with DLLs hidden in various folders

src/ctrl/ctrl_core.h

@@ -824,6 +824,22 @@ struct CTRL_ModuleImageInfoCache
   CTRL_ModuleImageInfoCacheStripe *stripes;
 };
 
+////////////////////////////////
+//~ rjf: Touched Debug Info Directory Cache
+
+typedef struct CTRL_DbgDirNode CTRL_DbgDirNode;
+struct CTRL_DbgDirNode
+{
+  CTRL_DbgDirNode *first;
+  CTRL_DbgDirNode *last;
+  CTRL_DbgDirNode *next;
+  CTRL_DbgDirNode *prev;
+  CTRL_DbgDirNode *parent;
+  String8 name;
+  U64 search_count;
+  U64 child_count;
+};
+
 ////////////////////////////////
 //~ rjf: Wakeup Hook Function Types
 
@@ -880,6 +896,8 @@ struct CTRL_State
   CTRL_MetaEvalArray user_meta_evals;
   U64 exception_code_filters[(CTRL_ExceptionCodeKind_COUNT+63)/64];
   U64 process_counter;
+  Arena *dbg_dir_arena;
+  CTRL_DbgDirNode *dbg_dir_root;
   
   // rjf: user -> memstream ring buffer
   U64 u2ms_ring_size;