The trcgen subroutine, trchook subroutine, trcoff subroutine, trcon subroutine, trcstart subroutine, trcstop subroutine in AIX 5L Version 5.2 Technical Reference: Base Operating System and Extensions Volume 2.
The trace daemon, trcdead command, trcnm command, trcrpt command, trcstop command, trcupdate command in AIX 5L Version 5.2 Commands Reference, Volume 5.