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https://github.com/LadybirdBrowser/ladybird
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68fa684f76
Report outline storage retained by scripts, environments, module namespace objects, iterator helpers, property name iterators, argument objects, and error tracebacks. These objects keep vectors and maps that can grow independently from their GC cell sizes.
63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
/*
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* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/ExternalMemory.h>
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#include <LibJS/Runtime/PrivateEnvironment.h>
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namespace JS {
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GC_DEFINE_ALLOCATOR(PrivateEnvironment);
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PrivateEnvironment::PrivateEnvironment(PrivateEnvironment* parent)
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: m_outer_environment(parent)
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, m_unique_id(s_next_id++)
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{
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// FIXME: We might want to delay getting the next unique id until required.
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VERIFY(s_next_id != 0);
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}
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// Note: we start at one such that 0 can be invalid / default initialized.
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u64 PrivateEnvironment::s_next_id = 1u;
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PrivateName PrivateEnvironment::resolve_private_identifier(Utf16FlyString const& identifier) const
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{
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auto name_or_end = find_private_name(identifier);
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if (!name_or_end.is_end())
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return *name_or_end;
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// Note: This verify ensures that we must either have a private name with a matching description
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// or have an outer environment. Combined this means that we assert that we always return a PrivateName.
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VERIFY(m_outer_environment);
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return m_outer_environment->resolve_private_identifier(identifier);
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}
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void PrivateEnvironment::add_private_name(Utf16FlyString description)
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{
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if (!find_private_name(description).is_end())
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return;
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m_private_names.empend(m_unique_id, move(description));
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}
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bool PrivateName::operator==(PrivateName const& rhs) const
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{
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return unique_id == rhs.unique_id && description == rhs.description;
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}
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void PrivateEnvironment::visit_edges(Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_outer_environment);
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}
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size_t PrivateEnvironment::external_memory_size() const
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{
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return vector_external_memory_size(m_private_names);
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}
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}
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