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LibJS: Only consider VM-accessible execution contexts as strong roots
Partially reverts 3dc5f467a8
to fix
GC memory leak that happens because we treated all execution contexts
as strong roots.
This commit is contained in:
parent
cbb660c756
commit
b108d51c5b
9 changed files with 32 additions and 18 deletions
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@ -153,6 +153,20 @@ Bytecode::Interpreter& VM::bytecode_interpreter()
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return *m_bytecode_interpreter;
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}
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struct ExecutionContextRootsCollector : public Cell::Visitor {
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virtual void visit_impl(Cell& cell) override
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{
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roots.set(&cell);
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}
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virtual void visit_possible_values(ReadonlyBytes) override
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{
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VERIFY_NOT_REACHED();
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}
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HashTable<Cell*> roots;
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};
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void VM::gather_roots(HashMap<Cell*, HeapRoot>& roots)
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{
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roots.set(m_empty_string, HeapRoot { .type = HeapRoot::Type::VM });
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@ -169,6 +183,18 @@ void VM::gather_roots(HashMap<Cell*, HeapRoot>& roots)
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for (auto finalization_registry : m_finalization_registry_cleanup_jobs)
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roots.set(finalization_registry, HeapRoot { .type = HeapRoot::Type::VM });
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auto gather_roots_from_execution_context_stack = [&roots](Vector<ExecutionContext*> const& stack) {
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for (auto const& execution_context : stack) {
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ExecutionContextRootsCollector visitor;
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execution_context->visit_edges(visitor);
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for (auto* cell : visitor.roots)
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roots.set(cell, HeapRoot { .type = HeapRoot::Type::VM });
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}
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};
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gather_roots_from_execution_context_stack(m_execution_context_stack);
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for (auto& saved_stack : m_saved_execution_context_stacks)
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gather_roots_from_execution_context_stack(saved_stack);
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}
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ThrowCompletionOr<Value> VM::named_evaluation_if_anonymous_function(ASTNode const& expression, DeprecatedFlyString const& name)
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