IssueTracker

While working on BaselineProfileRule, I noticed that all of the launches in simple tests are warm, since we don't kill the process.

This means we're only ever hitting actual process startup code once, even if we loop many times.

We should consider making it easier to define a StartupMode.COLD startup, but if so, also make sure to correctly handle broadcasting the SIGUSR1 when the app is killed.

If platform is extremely aggressive about including cold startup in the profile, this may not be necessary, but we should check if we miss anything if the dev calls killProcess explicitly since we're not sending the SIGUSR1.