Hi,
I come from Linux background, and currently working on Dtrace on FreeBSD.
Having worked on SystemTap on Linux, I worked with para-callgraph.stp a lot to
trace user-space function calls, of user defined functions to understand new
utilities.
Is there a utility like para-callgraph.stp available in dtrace. If not, is it
feasible to create one (provided there are constructs available).
#!/usr/bin/stap
function trace(entry_p, extra) {
%( $# > 1 %? if (tid() in trace) %)
printf("%s%s%s %s\n",
thread_indent (entry_p),
(entry_p>0?"->":"<-"),
ppfunc (),
extra)
}
%( $# > 1 %?
global trace
probe $2.call {
trace[tid()] = 1
}
probe $2.return {
delete trace[tid()]
}
%)
probe $1.call { trace(1, $$parms) }
probe $1.return { trace(-1, $$return) }
I was trying to rewrite this for dtrace, dtrace understands conditional
compilation as well. So will this work for tracing call-graphs of user space
programs if written as a dtrace script.
------------------------------------------
DTrace: dtrace-discuss
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