[Webkit-unassigned] [Bug 168786] New: Ensure that the end of the last invalidation point does not extend beyond the end of the buffer.

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Feb 23 10:46:45 PST 2017


https://bugs.webkit.org/show_bug.cgi?id=168786

            Bug ID: 168786
           Summary: Ensure that the end of the last invalidation point
                    does not extend beyond the end of the buffer.
    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

In practice, we will always have multiple instructions after invalidation points, and have enough room in the JIT buffer for the invalidation point to work with.  However, as a precaution, we can guarantee that there's enough room by always emitting a label just before we link the buffer.  The label will emit nop padding if needed.

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