side effects on object literals

[Gus Caplan]

Given some input like `({}.a = 1)`, evaluated with throwOnSideEffects, how does V8 know that it is safe to mutate that specific object?

[Yang Guo]

We have a TemporaryObjectsTracker that tracks which objects are temporarily allocated during side effect free mode: https://source.chromium.org/chromium/chromium/src/+/master:v8/src/debug/debug.cc;l=2213?q=startsideeffect&ss=chromium&originalUrl=https:%2F%2Fcs.chromium.org%2F

On Fri, Jul 3, 2020 at 5:21 PM Gus Caplan <fluffyro...@gmail.com> wrote:

Given some input like `({}.a = 1)`, evaluated with throwOnSideEffects, how does V8 know that it is safe to mutate that specific object?

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