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https://github.com/RGBCube/serenity
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f7a1696087
A MarkedValueList is basically a Vector<JS::Value> that registers with the Heap and makes sure that the stored values don't get GC'd. Before this change, we were unsafely keeping Vector<JS::Value> in some places, which is out-of-reach for the live reference finding logic since Vector puts its elements on the heap by default. We now pass all the JavaScript tests even when running with "js -g", which does a GC on every heap allocation.
58 lines
2 KiB
C++
58 lines
2 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Noncopyable.h>
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#include <AK/Vector.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/Value.h>
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namespace JS {
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class MarkedValueList {
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AK_MAKE_NONCOPYABLE(MarkedValueList);
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public:
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explicit MarkedValueList(Heap&);
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MarkedValueList(MarkedValueList&&);
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~MarkedValueList();
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MarkedValueList& operator=(MarkedValueList&&) = delete;
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bool is_empty() const { return m_values.is_empty(); }
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size_t size() const { return m_values.size(); }
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void clear() { m_values.clear(); }
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Vector<Value, 32>& values() { return m_values; }
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void append(Value);
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private:
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Heap& m_heap;
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Vector<Value, 32> m_values;
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};
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}
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