There are multiple code paths for accessing arrays, including the assembly in the LLInt but also the code in JSObject. You could instrument all of it if you wanted to.
-Filip > On Apr 26, 2014, at 6:09 AM, wei wang <[email protected]> wrote: > > Hello, > > I wonder, is it possible to profile every read/write to an array? > More specifically, how to get the index of JSArray according to each > read/write? > > Here is an example, consider the following js statement, > > b = a[1], > > I find that there are three relevant bytecode statements for "reading a[1]", > > > resolve_scope --- that is, a > get_from_scope --- get a's address, possibly > get_by_val --- get 1 > > > By following the LLint using GDB, I cannot find the corresponding methods in > JSArray for accessing the value of a[1]. It seems that a[1] is accessed > directly using the offset. Any suggestion will be helpful. Thanks! > > > Wei > _______________________________________________ > webkit-dev mailing list > [email protected] > https://lists.webkit.org/mailman/listinfo/webkit-dev _______________________________________________ webkit-dev mailing list [email protected] https://lists.webkit.org/mailman/listinfo/webkit-dev
