[Webkit-unassigned] [Bug 176647] New: Avoid duplicate computations of ExecState::vm().

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176647

            Bug ID: 176647
           Summary: Avoid duplicate computations of ExecState::vm().
           Product: WebKit
           Version: WebKit Nightly 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

Because while computing ExecState::vm() is cheap, it is not free.

This patch also:
1. gets rids of some convenience methods in CallFrame that implicitly does a ExecState::vm() computation.
2. passes vm (when available) to methodTable().
3. passes vm (when available) to JSLockHolder.

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