make meminst->size_in_pages atomic

for longer term, i'm thinking to make memory.grow suspend all other threads instead.
yamt · Apr 5, 2023 · fe49507 · fe49507
1 parent 0dfcea7
commit fe49507
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/type.h b/lib/type.h
@@ -395,7 +395,8 @@ struct funcinst {
 
 struct meminst {
         uint8_t *data;
-        uint32_t size_in_pages; /* overrides type->min */
+        /* Note: memory_getptr2 reads size_in_pages w/o locks */
+        _Atomic uint32_t size_in_pages; /* overrides type->min */
         uint32_t allocated;
         const struct memtype *type;