feat: force check on new arrays and new obj props

builtin_array.go

@@ -80,7 +80,19 @@ func relToIdx(rel, l int64) int64 {
 	return max(l+rel, 0)
 }
 
-func (r *Runtime) newArrayValues(values []Value) *Object {
+func (r *Runtime) newArrayValues(values valueStack) *Object {
+	if r.shouldForceMemCheck {
+		memCtx := newMemUsageContextClone()
+		if memCtx != nil {
+			memUsage, err := valuesMemUsage(values, memCtx)
+			if err != nil {
+				panic(err)
+			}
+			if memCtx.MemUsageLimitExceeded(memUsage) {
+				panic("memory limit exceeded")
+			}
+		}
+	}
 	return setArrayValues(r.newArrayObject(), values).val
 }
 

object.go

@@ -548,6 +548,18 @@ func (o *baseObject) setOwnStr(name unistring.String, val Value, throw bool) boo
 			o.val.runtime.typeErrorResult(throw, "Cannot add property %s, object is not extensible", name)
 			return false
 		} else {
+			if o.val.runtime.shouldForceMemCheck {
+				memCtx := newMemUsageContextClone()
+				if memCtx != nil {
+					memUsage, err := val.MemUsage(memCtx)
+					if err != nil {
+						panic(err)
+					}
+					if memCtx.MemUsageLimitExceeded(memUsage) {
+						panic("memory limit exceeded")
+					}
+				}
+			}
 			o.values[name] = val
 			names := copyNamesIfNeeded(o.propNames, 1)
 			o.propNames = append(names, name)