heap blobs

source/quickjs-internal.h

@@ -898,12 +898,12 @@ typedef struct JSArray {
   JSValue values[];               /* inline flexible array member */
 } JSArray;
 
-/* JSBlob — not allocated on GC heap (blobs use JSRecord + opaque).
-   Struct kept for reference; gc_object_size/gc_scan_object do not handle OBJ_BLOB. */
+/* JSBlob — inline bit data on the GC heap.
+   cap56 = capacity in bits, S bit = stone (immutable). */
 typedef struct JSBlob {
-  objhdr_t mist_hdr;
-  word_t length;
-  uint8_t bits[];
+  objhdr_t mist_hdr;  /* type=OBJ_BLOB, cap56=capacity_bits, S=stone */
+  word_t length;       /* used bits */
+  word_t bits[];       /* inline bit data, ceil(cap56/64) words */
 } JSBlob;
 
 typedef struct JSText {