Date: Tue, 21 Nov 2006 15:47:14 +0100 From: Alexander Leidinger <Alexander@Leidinger.net> To: Robert Watson <rwatson@FreeBSD.org> Cc: trowa-4 <trowa-4@yahoo.com.tw>, Dag-Erling =?utf-8?b?U23Dg8K4cmdyYXY=?= <des@des.no>, Jeremie Le Hen <jeremie@le-hen.org>, freebsd-hackers@FreeBSD.org Subject: Re: Process Debugging questions Message-ID: <20061121154714.03vzlj72sss88k4c@webmail.leidinger.net> In-Reply-To: <20061121142005.T63599@fledge.watson.org> References: <571883.4868.qm@web72011.mail.tp2.yahoo.com> <86irhlfvg2.fsf@dwp.des.no> <20061120221026.GC20405@obiwan.tataz.chchile.org> <86d57hjhwu.fsf@dwp.des.no> <20061121115333.N50450@fledge.watson.org> <20061121150941.wlwmfw8u0w0c444k@webmail.leidinger.net> <20061121142005.T63599@fledge.watson.org>
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Quoting Robert Watson <rwatson@FreeBSD.org> (from Tue, 21 Nov 2006 14:21:59 +0000 (GMT)): > > On Tue, 21 Nov 2006, Alexander Leidinger wrote: > >> Quoting Robert Watson <rwatson@FreeBSD.org> (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 = 72077137help
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