February 2009 - Darwin-dev - lists.apple.com

RE: dladdr() returns garbage for nearest symbol name
by Karan, Cem (Civ, ARL/CISD) 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AcmGDZBdK3h7yQcwTCOP9Xh4vdGvDQAAKVAg Thread-topic: dladdr() returns garbage for nearest symbol name Ah, thanks, brain dead of me to do that. I'll fix my code ASAP. Thanks, Cem Karan > -----Original Message----- > From: Brian Mastenbrook [mailto:brian@mastenbrook.net] > Sent: Tuesday, February 03, 2009 9:42 AM > To: Karan, Cem (Civ, ARL/CISD) > Cc: Darwin Dev > Subject: Re: dladdr() returns garbage for nearest symbol name > > Karan, Cem (Civ, ARL/CISD) wrote: > > I've finally gotten my -finstrument-functions hack working > with dladdr(), but I've noticed that I'm getting a fair > amount of garbage out of it. Basically, I'm calling it like so: > > You're not checking the return value of dladdr, so there is > no way to tell if dladdr is actually returning that value or > not. My guess is that it is not setting the function name at > all and is returning zero. > -- > Brian Mastenbrook > brian(a)mastenbrook.net > http://brian.mastenbrook.net/ > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: dladdr() returns garbage for nearest symbol name
by Brian Mastenbrook 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Thunderbird 2.0.0.19 (Windows/20081209) Karan, Cem (Civ, ARL/CISD) wrote: I've finally gotten my -finstrument-functions hack working with dladdr(), but I've noticed that I'm getting a fair amount of garbage out of it. Basically, I'm calling it like so: You're not checking the return value of dladdr, so there is no way to tell if dladdr is actually returning that value or not. My guess is that it is not setting the function name at all and is returning zero. -- Brian Mastenbrook brian(a)mastenbrook.net http://brian.mastenbrook.net/ _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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dladdr() returns garbage for nearest symbol name
by Karan, Cem (Civ, ARL/CISD) 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AcmGDN9CDz3N5ThMRHKUAa0AWTSB/g== Thread-topic: dladdr() returns garbage for nearest symbol name I've finally gotten my -finstrument-functions hack working with dladdr(), but I've noticed that I'm getting a fair amount of garbage out of it. Basically, I'm calling it like so: void __cyg_profile_func_enter(void *this_fn, void *call_site) { Dl_info functionInfo; dladdr(this_fn, &functionInfo; Dl_info call_siteInfo; dladdr(call_site, &callsiteInfo); syslog(LOG_INFO, "%s got called from within %s", call_siteInfo.dli_sname, functionInfo.dli_sname); } The problem is that although the function name is always good, the call site info is often bad. I'll get output like "???^H?^C?^XG??^A???", without the quotes. This isn't very useful. Any ideas on what I'm seeing and what I need to do to correct this? Thanks, Cem Karan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Using launchctl load
by Rakesh Singhal 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=0YJxU4JOl32v3p2XcXJCOrLFGWKl1OGmnUfa5ylA0Iw=; b=Gm1bmgTUxn9+THraum7FRRWjV8XIYgw6j8lUcndjIVMHuF+YE0SLiyCQEq3cPQctJD kx1JMdnK90uxzGjebrN9AkMqpbljwzIM6UwEHJibWXXhkiCZMqxXMBtHqYTTyNeMHjul rIDPJshgMB4dQ1KQXoqCeMjHQcb5wd8O61Jd8= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=oXPTxjXGNURXxuE4JRvsTa7FdI5iThm6sR0umrLnagVRKQOPXjl+/e7/3wBeVRLdT6 ddb4kpIhUszlkrBJD+MwMuIYvxtNPDb7Y9YDnr3Y8bP3j6A4bl2LHLr5iPevAM4f7Nys ikthKzvvLMQePKNKy4XaNoGT0apdFjmrNwdjU= Hi Axel, Thanks. The plist file is: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>Label</key> <string>com.mycompany.mydaemond</string> <key>OnDemand</key> <true/> <key>ProgramArguments</key> <array> <string>/Library/Application Support/MyFolder/MyDaemon</string> </array> <key>RunAtLoad</key> <true/> </dict> </plist> As you wrote daemons (/Library/LaunchDaemons) should not depend, it is right. Infact it wroks properly if I reboot the system. But I want to avoid to reboot the system only for daemon, so I use "launchctl load /Library/LaunchDaemons/com.mycompany.mydaemond.plist" to make it work. It works fine but when I log out, it doesnt work. I think, it should not get affected even using launchctl load command cause it is daemon. Regards rksinghal On Tue, Feb 3, 2009 at 6:41 PM, Axel Luttgens <luttgens(a)fusl.ac.be> wrote: > Le 3 févr. 09 à 11:43, Rakesh Singhal a écrit : > >> Hi all, >> >> I have one query and I have not found any documentation on this. I >> wrote one plist and put it in LaunchDaemons folder. Now, to avoid >> rebooting the system I use "launchctl load >> /Library/LaunchDaemons/com.mycompany.mydaemon.plist" to start the >> daemon. It starts working properly. When I logout and log in again, it >> does not get started. > > Hello Rakesh, > > System daemons (the ones started from plists found in > /System/Library/LaunchDaemons and /Library/LaunchDaemons) do not depend on > the user logging in or out; only user agents (the ones started from plists > found in /System/Library/LaunchAgents, /Library/LaunchAgents and > ~/Library/LaunchAgents) do. > But note that user agents never were fully functional with Tiger. > > If you haven't already done so, perhaps could you have a look at: > > > <http://developer.apple.com/documentation/MacOSX/Conceptual/BPSystemStartup/…> > > as well as at the man pages for launchd(8) and launchd.plist(5). > > >> If I reboot then it works fine. >> >> Do I need to modify plist file? >> or >> is there any other way to do it? >> or >> it behaves in this way only. > > Could you tell us a bit more about what you want to achieve? > And post your plist here? > > >> Testing machine is iMac 10.4.11 PPC. > > As said above, this is an important point. ;-) > > HTH, > Axel > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Using launchctl load
by Rakesh Singhal 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type:content-transfer-encoding; bh=XAYng0GK4pEsuOBDOU9hFcVrzn5o27eUZOjv+ufMzUw=; b=tZLZEk0vQUKOCDZz8+QkhBl0l5euYGXZ66mMKhCQNi0uh2tAMP/TKQZNkIrBQFJkU+ fWuJ4YdF8Dmxo+xvfxkxZelT+4vjxY+tQbIZtAT4yzMLN8hXpdSnS7pg18vhfBCFD3ny FK+WMG64cOGWzhp2zBzd70GC1+e2nlpiq6KIk= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type :content-transfer-encoding; b=QhUvYR/lqwIEWUv+nRKeACyT4KPonasks6vZP9sxGYHrsflT2CT3Iu3VguZVgb2d8V JhIFlS4lSvQgQ3p6xYZ+dc70bRB2mZuoQVFev8HpoVmKDGuOnMSqXxRS7P1UNnstQJth W6GUAwVzJYMwS5JCaqL4FM/7PI0q+O11oQJzg= Hi all, I have one query and I have not found any documentation on this. I wrote one plist and put it in LaunchDaemons folder. Now, to avoid rebooting the system I use "launchctl load /Library/LaunchDaemons/com.mycompany.mydaemon.plist" to start the daemon. It starts working properly. When I logout and log in again, it does not get started. If I reboot then it works fine. Do I need to modify plist file? or is there any other way to do it? or it behaves in this way only. Testing machine is iMac 10.4.11 PPC. Regards rksinghal _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Stack trace without atos
by Steve Checkoway 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Feb 2, 2009, at 10:52 PM, Arnab Ganguly wrote: -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com Is it possible to get stack trace along with symbol information without using atos? My suggestion was to search the archives, not just reask the question on a different list. smime.p7s

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Stack trace without atos
by Arnab Ganguly 03 Feb '09

03 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=Pyig9Udjj1JXExS43gV5v+j1TP1tlNql5NJriJEroaM=; b=ATGQBmfLQElEIsyPChKU5BmwDwL+Ow38RiP5rl6BeNx8ZLb8pJQM/WPmYvVSW5vMzP bPYuDnJtMWR+P+gdY990VpWWNYFwWcBW+n0nLEMselgSnl9VdLSqbLo3gvQCscDFlfSQ YcYn8dbKxtvXPASl87Q0nsVY3WGiybyHVaGnA= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=Z2ogYEoK3Jt3jIGXr6ZIP2JA/B4CfRB3SnQSCUS9eydV6GIOUUGbrpz0yEw5qJP+mB UUJbdsSlk//QCWVUdHIWlDoYg8UOaN6OpvGXFgVKsM4n7HjGwAHF5s8856eSUY84RSrk hIr+wNU1xM1fchat5zHKQLMEwFrpJEFRfVhQA= _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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RE: Easiest way to get function name/offset from a hex address?
by Karan, Cem (Civ, ARL/CISD) 02 Feb '09

02 Feb '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AcmDGUnVAyiaktC9Tc+IAcc1ZNMqGACF67GA Thread-topic: Easiest way to get function name/offset from a hex address? Terry Lambert wrote on Friday, January 30, 2009 3:28 PM > On Jan 29, 2009, at 6:29 AM, Karan, Cem (Civ, ARL/CISD) wrote: > > Terry Lambert wrote on Wednesday, January 28, 2009 4:37 PM > >> Within the program itself: > >> > >> man dladdr > >> > >> Outside the program itself: > >> > >> man atos > >> > >> The debugger, gdb, also has multiple modes in which it > operates, two > >> of which can be programmatically controlled (to permit things like > >> GUIs that still use gdb internally). You could open the > binary with > >> gdb in one of these modes and interactively query gdb for the > >> information. > > > > Can you tell me what these modes are? Or at least what to > look for in > > the manual? > > > The GDB/MI Interface > > <http://sourceware.org/gdb/current/onlinedocs/gdb_26.html#SEC260> Thank you, I'll spend some time reading through it all. > > My first choice is GDB, if I can get it to launch GUI apps > correctly. > > However, for alpha/beta testing, the dladdr trick is probably what > > I'll need. Crash reports just don't give enough info on how I got > > into the state I'm currently in. > > You can attach GUI apps after they are already launched. My crash happens before the run loop starts, so I don't have time to attach... :-/ Oh well, I guess its back to using sleep() for a long while in main, and trying to attach before I get out of sleep. Thanks for the help! Thanks, Cem Karan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Compiling for all OS X versions
by mlists＠ugsoft.de 02 Feb '09

02 Feb '09

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mach message disposition & transferring rights
by Neal Sidhwaney 02 Feb '09

02 Feb '09

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