[Webkit-unassigned] [Bug 158498] New: Simplify Interpreter::StackFrame.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158498

            Bug ID: 158498
           Summary: Simplify Interpreter::StackFrame.
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mark.lam at apple.com

Previously, Interpreter::StackFrame (which is used to capture info for Error.stack) eagerly extracts info out of CodeBlock and duplicate the work that CodeBlock does to compute line and column numbers (amongst other things).

This patch does away with the eager extraction and only stashes the CodeBlock pointer in the Interpreter::StackFrame.  Instead, Interpreter::StackFrame will provide methods for computing the desired values on request later.

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