[Webkit-unassigned] [Bug 24478] New: Add a new API to interrupt running javascript code from C++ side.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=24478

           Summary: Add a new API to interrupt running javascript code from
                    C++ side.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Enhancement
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: james.su at gmail.com


When running a piece of javascript code by using JSEvaluateScript() or
JSObjectCallAsFunction(), the native code might be blocked because of dead loop
or some other abnormal things in javascript code. In this case, a mechanism to
let native code be able to interrupt the javascript code by throwing a
javascript exception would be very useful.

A simple solution would be: Provides an API to let C++ code register a callback
to JavaScriptCore, then this callback will be called after certain number of
javascript instructions have been executed.

SpiderMonkey has similar feature, see:
https://developer.mozilla.org/en/SpiderMonkey/JSAPI_Reference/JS_SetOperationCallback
https://developer.mozilla.org/en/SpiderMonkey/JSAPI_Reference/JS_SetBranchCallback


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