fcgi.ini

vagrant:/vagrant/ (lsg-role✗) $ grep log /etc/hhvm/fcgi.ini                                                                                                                                                                        [16:26:13]
hhvm.debug.core_dump_report_directory = /var/log/hhvm
hhvm.log.admin_log.file = /var/log/hhvm/admin.log
hhvm.log.always_log_unhandled_exceptions = true
hhvm.log.header = true
hhvm.log.level = Warning
hhvm.log.native_stack_trace = true
hhvm.log.runtime_error_reporting_level = 8191
hhvm.log.use_syslog = true