rich unwind -> callstack, defined by ctrl layer, so we can begin floating meta evaluation cache to ctrl layer

src/ctrl/ctrl_core.h

@@ -370,6 +370,37 @@ struct CTRL_Unwind
   CTRL_UnwindFlags flags;
 };
 
+////////////////////////////////
+//~ rjf: Call Stack Types
+
+typedef struct CTRL_CallStackInlineFrame CTRL_CallStackInlineFrame;
+struct CTRL_CallStackInlineFrame
+{
+  CTRL_CallStackInlineFrame *next;
+  CTRL_CallStackInlineFrame *prev;
+  RDI_InlineSite *inline_site;
+};
+
+typedef struct CTRL_CallStackFrame CTRL_CallStackFrame;
+struct CTRL_CallStackFrame
+{
+  CTRL_CallStackInlineFrame *first_inline_frame;
+  CTRL_CallStackInlineFrame *last_inline_frame;
+  U64 inline_frame_count;
+  void *regs;
+  RDI_Parsed *rdi;
+  RDI_Procedure *procedure;
+};
+
+typedef struct CTRL_CallStack CTRL_CallStack;
+struct CTRL_CallStack
+{
+  CTRL_CallStackFrame *frames;
+  U64 concrete_frame_count;
+  U64 inline_frame_count;
+  U64 total_frame_count;
+};
+
 ////////////////////////////////
 //~ rjf: Trap Types
 
@@ -1034,6 +1065,11 @@ internal CTRL_UnwindStepResult ctrl_unwind_step(CTRL_EntityStore *store, CTRL_Ha
 //- rjf: abstracted full unwind
 internal CTRL_Unwind ctrl_unwind_from_thread(Arena *arena, CTRL_EntityStore *store, CTRL_Handle thread, U64 endt_us);
 
+////////////////////////////////
+//~ rjf: Call Stack Building Functions
+
+internal CTRL_CallStack ctrl_call_stack_from_unwind(Arena *arena, DI_Scope *di_scope, CTRL_Entity *process, CTRL_Unwind *base_unwind);
+
 ////////////////////////////////
 //~ rjf: Halting All Attached Processes