[Webkit-unassigned] [Bug 173884] New: Every function return should be an invalidation point for VMTraps

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=173884

            Bug ID: 173884
           Summary: Every function return should be an invalidation point
                    for VMTraps
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: keith_miller at apple.com

We want this as an optimization for VMTraps where we have the following problem:

DFG code, A, calls 1000 unique functions (also in DFG) in a loop that each take a long time to run. We insert traps in each of the unique calls but they never fire because we return to A, which calls the next function. i.e.

A() {
B();
C();
D();
E();
...
}

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