I just realized that the posix_spawn() is not decoded in SystemProfiler.
I have a trace from a system that is doing posix_spawn() calls to start new processes with given credentials.
Looking at the "raw event details" shows value 0x1B at offset 12 which is indicating that this is a posix_spawn()
but the IDE does not show the function.
This happens with a 4.6.1 Build 20100115 as well as with a 4.7.0 Build 20100505

thanks
/hp