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Revisiting DTrace syscall provider
I'm trying DTrace syscall provider (systrace) patch
provided by riz some years ago(*) to complete the work.
(I'm already ack-ed the handover by him.)
I needed some tweaks to make it work with -current,
but it works (on amd64) anyway.
Noticeable changes from the riz's patch are
- Move systrace_probe_func definition to
sys/kern/kern_dtrace.c from sys/arch/amd64/amd64/trap.c
to support architectures other than amd64
- Make it buildable for i386 and arm
(some fixes to dtrace itself are already committed)
A known todo is to support syscall emulations, although
it can be done later. I think only native syscall support
is still worthwhile to merge.
Here is a patch:
Er...the patch is too big to look at because it includes
mechanically generated *sysent.c and *systrace_args.c.
So I prepare another patch that excludes them:
And here is a git branch. Please use it if you want to
see the changes as individual commits:
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