Re: Process Debugging questions

Quoting Robert Watson <rwatson@xxxxxxxxxxx> (from Tue, 21 Nov 2006 14:21:59 +0000 (GMT)):


On Tue, 21 Nov 2006, Alexander Leidinger wrote:

Quoting Robert Watson <rwatson@xxxxxxxxxxx> (from Tue, 21 Nov 2006 11:55:37 +0000 (GMT)):

Anyone who wants to start looking at a new API should make sure they look at ptrace() and procfs across a range of platforms, and also look at Mach task ports and what they offer. One of the things we really can't do well with ptrace() today is inspect kernel state for a running process -- things like the VM layout, etc. We should make sure any next generation system allows this, because that feature alone is the reason why I sometimes mount procfs. :-)

Can you please elaborate what features you have in mind which DTrace isn't able to deliver?

/proc/curproc/map

With DTrace we have access to a lot of stuff. I think this is only a case of writting the right dtrace script (intercepting malloc/free/sbrk/mmap/... should allow for more sophisticated output).

Bye,
Alexander.

--
http://www.Leidinger.net Alexander @ Leidinger.net: PGP ID = B0063FE7
http://www.FreeBSD.org netchild @ FreeBSD.org : PGP ID = 72077137
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