Bug 241719 – Enhance Options::useOSLog to accept an os log type value.

• Component: JavaScriptCore
• Status: RESOLVED FIXED

[Mark Lam]

This option only applies to OS(DARWIN).

For example, we can now use any of these:
    --useOSLog=default    // logs to OS_LOG_TYPE_DEFAULT
    --useOSLog=info       // logs to OS_LOG_TYPE_INFO
    --useOSLog=debug      // logs to OS_LOG_TYPE_DEBUG
    --useOSLog=error      // logs to OS_LOG_TYPE_ERROR
    --useOSLog=fault.     // logs to OS_LOG_TYPE_FAULT

We can still use --useOSLog=0 or false (which means do the normal dataLog) and --useOSLog=1 or true (which means dataLog to OS_LOG_TYPE_ERROR).

Previously, when we specify --useOSLog=1, we will data log to OS_LOG_TYPE_INFO.  This has been a source of friction in usage because no one ever remembers that we need enable OS_LOG_TYPE_INFO in the log stream  to see this logging.  Instead, --useOSLog=1 will now log to OS_LOG_TYPE_ERROR, which ensures that logging will show up in log stream.  This is fine to do because the --useOSLog=1 option indicates that the client really wants to see the logs.  Otherwise, the client can use one of the other os log types if they want something different.

Secondly, because -useOSLog=1 indicates that the client really wants to see the logs, logging to OS_LOG_TYPE_ERROR ensures that the logging is flushed to the file system instead of sitting in a memory buffer, and potentially not showing up in the log stream.

[Mark Lam]

Pull request: https://github.com/WebKit/WebKit/pull/1598

[Mark Lam]

Created attachment 460312 [details]
EWS testing.

[Mark Lam]

Created attachment 460321 [details]
EWS testing.

[Mark Lam]

Created attachment 460324 [details]
EWS testing.

[EWS]

Committed r295656 (251661@main): <https://commits.webkit.org/251661@main>

Reviewed commits have been landed. Closing PR #1598 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/95433917>

[Alexey Proskuryakov]

*** Bug 241721 has been marked as a duplicate of this bug. ***