On Thu, Jan 29, 2009 at 6:09 AM, Karan, Cem (Civ, ARL/CISD) <cka...@arl.army.mil> wrote: > Greg Parker wrote on Wednesday, January 28, 2009 4:22 PM > >> On Jan 28, 2009, at 10:33 AM, Karan, Cem (Civ, ARL/CISD) wrote: >> > First off, I know this question is going to the wrong list, >> but I have >> > NO idea which list would be best. If anyone wants to jump >> in and tell >> > me a better list, I'll gladly move there. >> > >> > Background: >> > I have an application that is working very, very hard to drive me >> > insane. It is multithreaded, lazy, and has my broken attempt at >> > trampoline code. Now, it crashes once in a while, but I'm not sure >> > what the trail of broken bits are that causes the crash. If only I >> > had a way of instrumenting every single entry and exit of each >> > function, I could log it all… which is exactly what -finstrument- >> > functions does. >> >> You'll likely get better results from dtrace than >> -finstrument- functions. DTrace can be programmed to act on >> function entry or exit for all functions in a specified file. >> (DTrace experts: this is your cue to chime in.) > > I thought DTrace was primarily statistical in nature, right?
DTrace is probe based. If a probe exists and is enabled it will fire and allow you to collect information. For example try the following in terminal... sudo dtrace -n 'syscall:::entry' With that said you need a provider that provides the probe points that you need. Apple has implemented many providers in 10.5. For example you can probe many aspects of message dispatch in the objective-c runtime or syscalls without any need to instrument your code. In terminal run "sudo dtrace -l" to see a list of providers in the system. I don't believe an Apple provider exist (or can exist) for general probing of C++ or C function entry and exit. You will have to instrument C++ methods and C function (aka make your own provider) to be able to use DTrace for what I think you are attempting to do. -Shawn _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
