FTL_LOG statements not showing up on iOS

[tvolkert]

It looks like since we stopped forwarding stdout to syslog on iOS, our stdout logging is getting swallowed on iOS.

One very visible manifestation of this is that uncaught Dart exceptions are currently logged using FTL_LOG, which on iOS just logs to stderr. The net result is that uncaught Dart exceptions don't show up anywhere in the logs on iOS.

I have a local patch to FTL that will make FTL_LOG send the logs to syslog on iOS.

FYI @abarth @cbracken

[cbracken]

+1 to the proposed fix, that'll cover iOS 8-10, but IIRC won't work for iOS 11+. That's a separate issue that we've already got an open issue for (#10602).

[tvolkert]

https://fuchsia-review.googlesource.com/#/c/39627/

[cbracken]

We're good to close this now, correct?

[tvolkert]

The fix has landed in FTL and been rolled into the engine repo. I was waiting 'til we rolled the engine into Flutter to close this.