[webkit-dev] WebKit memory instrumentation

Maciej Stachowiak mjs at apple.com
Mon Jul 23 13:47:08 PDT 2012

On Jul 23, 2012, at 8:09 AM, Yury Semikhatsky <yurys at chromium.org> wrote:

> First option we consider is to define a class with the same set of fields as the instrumented one, then have a compile time assert that size of the reference class equals to the size of the instrumented one. See https://bugs.webkit.org/attachment.cgi?id=153479&action=review for more details.
> Pros: compile time error whenever size of an instrumented class changes with the appropriate modifications to the instrumentation function.
> Cons: it will require each committer to adjust the reference class and the instrumentation on any modification that affects size of the instrumented class. Changes that don't affect size of the class will go unnoticed.

What is the advantage of this approach compared to just using the sizeof operator on the relevant classes?


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