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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/cppgc-js/cross-heap-remembered-set.h"
#include "src/api/api-inl.h"
#include "src/handles/global-handles-inl.h"
#include "src/heap/cppgc/heap-page.h"
namespace v8::internal {
void CrossHeapRememberedSet::RememberReferenceIfNeeded(Isolate& isolate,
JSObject host_obj,
void* cppgc_object) {
DCHECK_NOT_NULL(cppgc_object);
// Any in-cage pointer must point to a vaild, not freed cppgc object.
auto* page =
cppgc::internal::BasePage::FromInnerAddress(&heap_base_, cppgc_object);
// TODO(v8:13475): Better filter with on-cage check.
if (!page) return;
auto& value_hoh = page->ObjectHeaderFromInnerAddress(cppgc_object);
if (!value_hoh.IsYoung()) return;
remembered_v8_to_cppgc_references_.push_back(
isolate.global_handles()->Create(host_obj));
}
void CrossHeapRememberedSet::Reset(Isolate& isolate) {
for (auto& h : remembered_v8_to_cppgc_references_) {
isolate.global_handles()->Destroy(h.location());
}
remembered_v8_to_cppgc_references_.clear();
remembered_v8_to_cppgc_references_.shrink_to_fit();
}
} // namespace v8::internal
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