From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <20091110003356.GW19125@gradx.cs.jhu.edu> References: <55c52a87f0b8c0ac12a81a150f110b2b@brasstown.quanstro.net> <20091101184418.GM19125@gradx.cs.jhu.edu> <1257590719.28012.1344036163@webmail.messagingengine.com> <20091110003356.GW19125@gradx.cs.jhu.edu> Date: Mon, 9 Nov 2009 16:47:56 -0800 Message-ID: From: Roman Shaposhnik To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Subject: Re: [9fans] dtrace for plan 9 Topicbox-Message-UUID: 9842abd2-ead5-11e9-9d60-3106f5b1d025 On Mon, Nov 9, 2009 at 4:33 PM, Nathaniel W Filardo wrote: > On Mon, Nov 09, 2009 at 12:07:22AM +0000, dave.l@mac.com wrote: >> =A0yet too dangerous due to its possible unbounded runtime > > I keep hearing this brought up, but (while I am not an expert) AFAICT, th= e > runtime for each D hook should be strictly bounded by the number of > instructions lobbed in, since D does not (without root override, perhaps?= ) > support backwards jumps. =A0Am I mistaken in my understanding of DTrace? No, you are not. Thanks, Roman.