Breakpoints triggering.

src/alloy/backend/ivm/ivm_function.h

@@ -35,13 +35,16 @@ protected:
                        uint64_t return_address);
 
 private:
+  IntCode* GetIntCodeAtSourceOffset(uint64_t offset);
+  void OnBreakpointHit(runtime::ThreadState* thread_state, IntCode* i);
 
 private:
   size_t    register_count_;
   Register* constant_regiters_;
   size_t    intcode_count_;
   IntCode*  intcodes_;
-  // ... source_map_;
+  size_t          source_map_count_;
+  SourceMapEntry* source_map_;
 };