August 2005 - Darwin-dev - lists.apple.com

Re: valgrind for Darwin or equivalent?
by Eric Albert 02 Aug '05

02 Aug '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com On Aug 1, 2005, at 8:53 AM, Jack Howarth wrote: That said, Guard Malloc is probably sufficient for your needs: gdb /path/to/your/app set env DYLD_INSERT_LIBRARIES /usr/lib/libgmalloc.dylib r ...wait till your app crashes... bt -Eric _______________________________________________ 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… I asked because one of the gcc developers thought that there had been a project to create a BSD version of valgrind and that might have forked to create a Darwin one. However I can't find any information on that. I briefly looked into porting Valgrind to Mac OS X on Intel during a vacation a while back, hoping that the existence of a FreeBSD-hosted version of Valgrind would make it easier. Unfortunately, the FreeBSD version was very out of date, and even so, the differences between Mac OS X and the FreeBSD kernel meant that it'd be a large undertaking. I haven't looked into this since then, so I don't know if the FreeBSD version has moved forward or been dropped. Either way, it'd be great if someone managed to make Valgrind work once the first Intel-based Macs ship. This email sent to site_archiver(a)lists.apple.com

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IPFW logging
by Veronica Siu-Suen Law 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com net.inet.ip.fw.enable=1 net.inet.ip.fw.verbose = 1 net.inet.ip.fw.verbose_limit = 65535 Veronica -- Veronica Siu-Suen Law System Administrator NASA Ames Research Center M/S 258-6, N258 Rm 134-8 Office: (650) 604-1997 _______________________________________________ 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… Has anyone been able to see logging from IPFW in /var/log/system.log or /var/log/ipfw.log when one has enable the following flags in the /etc/sysctl.conf and uses a custom IPFW rule? This email sent to site_archiver(a)lists.apple.com

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Code to walk a process stack?
by David Hoerl 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com David _______________________________________________ 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… I'd like the ability to dynamically know how a certain function was called within a program. That is, I'd like to be able to walk the stack and see a trace of all the calls. There were some code snippets for doing this under the old MacOS, but I haven't been able to root one out myself. Can anyone suggest a place to look? This email sent to site_archiver(a)lists.apple.com

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Re: mach_port_t
by seebs＠plethora.net 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com In message <B99D18B1-98D9-48B8-96A5-C2B2EC121C37(a)apple.com>, Garth Cummings wri tes: >The main thing that changed is that the C standard now defines NULL >as (void *) 0. Earlier versions of the language did not specify a >value for NULL and most implementations defined NULL as 0. The C standard has defined NULL the same way since 1989; it is either an integer constant expression equal to zero, or the same cast to (void *). (Formally, "an implementation-defined null pointer constant.") What I don't understand is why something that has always been essentially a pointer thing (even if it wasn't always implemented that way) has been used for things that aren't pointers. >Converting a pointer to an integer is legal but non-portable: the >result is implementation-defined. Yes. >You'd have to ask the authors of the code. :-) My guess is that NULL >was just convenient. More strictly correct would be MACH_PORT_NULL. >Tiger also introduced IO_OBJECT_NULL as ((io_object_t) 0). >Tiger was built (mostly) with gcc 3.3. As Mac OS X moves to being >built with gcc 4.0, I would expect these warnings to be cleaned up. Okay, that makes sense. >In the I/O Kit master port case, since Jaguar there's been the >constant kIOMasterPortDefault. Just pass that to any call that needs >the I/O Kit master port, and you no longer need to call IOMasterPort >() explicitly. I was just using the example code for the HID driver stuff. Anyway, MACH_PORT_NULL and IO_OBJECT_NULL seem like good matches. -s _______________________________________________ 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: mach_port_t
by Garth Cummings 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ 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 smime.p7s

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Re: valgrind for Darwin or equivalent?
by Jason Townsend 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com -Jason _______________________________________________ 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… On Aug 1, 2005, at 7:15 AM, Jack Howarth wrote: I am trying to debug a heap corruption problem in unix program compiled with gfortran and Apple's gcc and g++ on MacOS X 10.4.2. I am told by the gnu gcc developers that valgrind is the best tool for this but I can only find a ppclinux version. Is there a port available for Darwin for valgrind? If not is there an equivalent tool for Apple that can be used from the command line? Thanks in advance for any information. You may want to try libgmalloc (also known as GuardMalloc). The libgmalloc man page has information on it. Also, you can set some environment variables when using the regular malloc such as MallocScribble and MallocCheckHeapStart/ MallocCheckHeapEvery. See the malloc man page for more on this. This email sent to site_archiver(a)lists.apple.com

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Re: valgrind for Darwin or equivalent?
by howarth＠bromo.msbb.uc.edu 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Terry, I asked because one of the gcc developers thought that there had been a project to create a BSD version of valgrind and that might have forked to create a Darwin one. However I can't find any information on that. Jack _______________________________________________ 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: valgrind for Darwin or equivalent?
by Terry Simons 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com _______________________________________________ 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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mach_port_t
by seebs＠plethora.net 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Some Apple code includes lines like: mach_port_t masterPort = NULL; When I compile this, I get a warning about converting a pointer to an integer without a cast. Sure enough, mach_port_t is an unsigned int. In fact, most of the things used like this seem to be unsigned ints, which are only passed around as cookies returned by mach calls. So. Why are they always initialized as though they were pointers? -s _______________________________________________ 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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valgrind for Darwin or equivalent?
by howarth＠bromo.msbb.uc.edu 01 Aug '05

01 Aug '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com I am trying to debug a heap corruption problem in unix program compiled with gfortran and Apple's gcc and g++ on MacOS X 10.4.2. I am told by the gnu gcc developers that valgrind is the best tool for this but I can only find a ppclinux version. Is there a port available for Darwin for valgrind? If not is there an equivalent tool for Apple that can be used from the command line? Thanks in advance for any information. Jack _______________________________________________ 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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