Bug 55249 – Leak in JSParser::Scope of ScopeLabelInfo Vector

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Michael Saboff]

In the struct Scope, the fuction pushLabel creates a LabelStack as needed that never gets cleaned up.

        void pushLabel(const Identifier* label, bool isLoop)
        {
            if (!m_labels)
                m_labels = new LabelStack;
            m_labels->append(ScopeLabelInfo(label->impl(), isLoop));
        }

[Michael Saboff]

Created attachment 83857 [details]
Added Destructor to clean up JSParser::Scope leak of ScopeLabelInfo Vector

[Darin Adler]

Comment on attachment 83857 [details]
Added Destructor to clean up JSParser::Scope leak of ScopeLabelInfo Vector

View in context: https://bugs.webkit.org/attachment.cgi?id=83857&action=review

I’d rather see m_labels be changed to an OwnPtr than just add the missing deletion.

> Source/JavaScriptCore/parser/JSParser.cpp:300
> +            if (m_labels)
> +                delete m_labels;

The if isn’t needed. C++ defines the delete operator to do nothing if the pointer passed is null.

[Michael Saboff]

Committed r79749: <http://trac.webkit.org/changeset/79749>