Add _pad field to frame_descr_long to ensure frame_size is aligned

instead of relying on the C compiler to insert it.
ocaml-flambda · Oct 20, 2022 · f607750 · f607750
1 parent ec43e50
commit f607750
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/ocaml/runtime/caml/stack.h b/ocaml/runtime/caml/stack.h
@@ -105,7 +105,8 @@ typedef struct {
 
 typedef struct {
   uintnat retaddr;
-  unsigned short marker;        /* frame_size_long */
+  unsigned short marker;        /* LONG_FRAME_MARKER */
+  unsigned short _pad;  /* Ensure frame_size is 4-byte aligned */
   uint32_t frame_size;
   uint32_t num_live;
   uint32_t live_ofs[1 /* num_live */];