Verified Commit 80567554 authored by Camil Staps's avatar Camil Staps 🚀

In wasm garbage collector, allow for empty spaces in the array of references from host to wasm

parent 0f06ce70
......@@ -3,6 +3,9 @@
;;(func $debug (import "clean" "debug") (param i32 i32 i32 i32))
;; to get host references during garbage collection
;; has-host-reference should return a heap pointer when the requested index
;; is found, 0 if it is not found and no higher index is known, or -1 if
;; it is not found but higher indexes may be known
(func $has-host-reference (import "clean" "has_host_reference") (param i32) (result i32))
(func $update-host-reference (import "clean" "update_host_reference") (param i32 i32))
......@@ -190,10 +193,18 @@
(block $end-copy-host-references
(loop $copy-host-references
(local.set $n (call $has-host-reference (local.get $d)))
(br_if $end-copy-host-references (i32.eqz (local.get $n)))
(i32.gt_s (local.get $n) (i32.const 0))
( (local.get $asp) (local.get $n))
(local.set $new (call $update-ref (local.get $asp) (local.get $new)))
(call $update-host-reference (local.get $d) (i32.load (local.get $asp)))
(local.set $d (i32.add (local.get $d) (i32.const 1)))
(br $copy-host-references)
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