erts: Avoid literals in process independent ErlNifEnv

that would go undetected and cause havoc if module is purged.

1 files changed, 4 insertions, 10 deletions

diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index f1c35cd5a5..4fd82bad10 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -803,19 +803,13 @@ ERL_NIF_TERM enif_make_copy(ErlNifEnv* dst_env, ERL_NIF_TERM src_term)
 {
     Uint sz;
     Eterm* hp;
-#ifdef SHCOPY
-    erts_shcopy_t info;
-    INITIALIZE_SHCOPY(info);
-    sz = copy_shared_calculate(src_term, &info);
-    hp = alloc_heap(dst_env, sz);
-    src_term = copy_shared_perform(src_term, sz, &info, &hp, &MSO(dst_env->proc));
-    DESTROY_SHCOPY(info);
-    return src_term;
-#else
+    /*
+     * No preserved sharing allowed as long as literals are also preserved.
+     * Process independent environment can not be reached by purge.
+     */
     sz = size_object(src_term);
     hp = alloc_heap(dst_env, sz);
     return copy_struct(src_term, sz, &hp, &MSO(dst_env->proc));
-#endif
 }