199359da18
This CL adds WasConservativeGC to HeapState which reports whether the last GC was finalized conservatively. The state is updated at the end of marking atomic pause. Currently the library integration in Blink ignores the stack state when scheduling a forced GC for testing. That means that we always schedule another GC after a forced GC. This causes a crash in web_tests which assume no GC is happening between forced GCs if the thread is not idle and no new allocations happen. Usage CL: https://crrev.com/c/2720201 Drive by: Fix stack state for MarkingVerifier in CppHeap. Bug: chromium:1056170 Change-Id: I6ad23ed7c1a53fae96425b968bc4b3eb18ce80b7 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2720279 Commit-Queue: Omer Katz <omerkatz@chromium.org> Reviewed-by: Michael Lippautz <mlippautz@chromium.org> Cr-Commit-Position: refs/heads/master@{#73064}
71 lines
2.1 KiB
C++
71 lines
2.1 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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/**
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* Returns whether the last garbage collection was finalized conservatively
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* (i.e., with a non-empty stack). This API is experimental and is expected to
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* 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 last garbage collection was finalized conservatively,
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* and false otherwise.
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*/
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static bool PreviousGCWasConservative(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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