On 3/24/2014 11:29 PM, Chris Johns wrote: > On 25/03/2014 4:41 am, Joel Sherrill wrote: >> On 3/24/2014 12:36 PM, Sebastian Huber wrote: >>> On 03/24/2014 06:14 PM, Joel Sherrill wrote: >>>> Hi >>>> >>>> My most recently built toolset seems to be using pthreads instead >>>> of the RTEMS thread code. Any ideas? >>>> >>> Its due to this patch: >>> >>> http://git.rtems.org/rtems-tools/tree/tools/4.11/gcc/gcc-rtems-thread-model-posix-1.diff >>> >>> We should really avoid using the POSIX GCC thread model. Its too >>> dangerous due to the silent errors. > Yes this is true but it did not fail in the way the RTEMS wrapper did > with SMP. I felt it was the lesser of 2 bad situations. > > I also suspect the issue with gcc and the POSIX thread support is still > open and will need to be addressed. As far as I understand the mingw64 > tools uses POSIX rather than the win32 thread model with an add on > pthread library. We need to propose a target specific macro to gcc to do something based on the status code. Something like a G++ run-time specific assert that the target can tailor. We really want to know about failures, I am not so sure that other targets do.
It will be hard for a user to debug random C++ run-time failures from resource allocation problems. FWIW having run into this problem porting things, there is a debug printk at the bottom of _Objects_Allocate() to report just this situation. Any allocation of anything with an ID fails at this single point. It is a handy debug thing but there may be a way to generalize this. >> I knew the patch and the problem. I was surprised it was included and >> wanted to confirm that we agreed it shouldn't be. >> >> Should I put together a patch for the RSB? >> > If we keep using the wrapper that is fine and I will review a patch once > the gxx wrapper changes to fix it have been completed and merged into > master. Sebastian, how is the gxx_wrapper code tested ? > > Long term I feel the posix thread model maybe a better path because it > means we need just one supported interface with gcc. The c++11 threading > support will also require pthreads. > > Chris -- Joel Sherrill, Ph.D. Director of Research & Development joel.sherr...@oarcorp.com On-Line Applications Research Ask me about RTEMS: a free RTOS Huntsville AL 35805 Support Available (256) 722-9985 _______________________________________________ rtems-devel mailing list rtems-devel@rtems.org http://www.rtems.org/mailman/listinfo/rtems-devel
