65893d84e5
Some types of supported low-level write barrier only requires passing a slot, which may not be even part of a heap object but stack. This complicates the situation, as even with caged heap, there's no way to distinguish a stack and heap slot. Solve this by passing an optional callback that can lazy be used to get the heap. This can be used by the embedder to retrieve the heap from e.g. TLS if needed. This aligns the barrier with Oilpan in Blink. Bug: chromium:1056170 Change-Id: I1e5d022ab17a2614a67b6ef39ed12691bcbd0ac6 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2675924 Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Omer Katz <omerkatz@chromium.org> Commit-Queue: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#72550}
60 lines
1.6 KiB
C++
60 lines
1.6 KiB
C++
// Copyright 2021 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef INCLUDE_CPPGC_HEAP_STATE_H_
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#define INCLUDE_CPPGC_HEAP_STATE_H_
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#include "v8config.h" // NOLINT(build/include_directory)
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namespace cppgc {
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class HeapHandle;
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namespace subtle {
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/**
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* Helpers to peek into heap-internal state.
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*/
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class V8_EXPORT HeapState final {
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public:
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/**
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* Returns whether the garbage collector is marking. This API is experimental
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* and is expected to be removed in future.
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*
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* \param heap_handle The corresponding heap.
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* \returns true if the garbage collector is currently marking, and false
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* otherwise.
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*/
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static bool IsMarking(const HeapHandle& heap_handle);
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/*
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* Returns whether the garbage collector is sweeping. This API is experimental
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* and is expected to be removed in future.
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*
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* \param heap_handle The corresponding heap.
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* \returns true if the garbage collector is currently sweeping, and false
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* otherwise.
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*/
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static bool IsSweeping(const HeapHandle& heap_handle);
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/**
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* Returns whether the garbage collector is in the atomic pause, i.e., the
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* mutator is stopped from running. This API is experimental and is expected
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* to be removed in future.
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*
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* \param heap_handle The corresponding heap.
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* \returns true if the garbage collector is currently in the atomic pause,
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* and false otherwise.
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*/
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static bool IsInAtomicPause(const HeapHandle& heap_handle);
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private:
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HeapState() = delete;
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};
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} // namespace subtle
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} // namespace cppgc
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#endif // INCLUDE_CPPGC_HEAP_STATE_H_
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