From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4FCF6152.7010002@xenomai.org> Date: Wed, 06 Jun 2012 15:55:30 +0200 From: Gilles Chanteperdrix MIME-Version: 1.0 References: <4FCF1517.3010904@xenomai.org> <4FCF1ED5.5000403@xenomai.org> <4FCF2751.5070700@xenomai.org> <4FCF4D05.3070502@xenomai.org> <4FCF58AF.5040106@xenomai.org> <4FCF5A4C.60704@xenomai.org> <4FCF5DED.8060007@xenomai.org> <4FCF60CD.8000709@xenomai.org> In-Reply-To: <4FCF60CD.8000709@xenomai.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] xenomai-2.6.0 instrumentation commands not executing List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Philippe Gerum Cc: Xenomai@xenomai.org On 06/06/2012 03:53 PM, Philippe Gerum wrote: > On 06/06/2012 03:41 PM, Gilles Chanteperdrix wrote: >> On 06/06/2012 03:25 PM, Philippe Gerum wrote: >>> On 06/06/2012 03:18 PM, Gilles Chanteperdrix wrote: >>>> On 06/06/2012 02:28 PM, Philippe Gerum wrote: >>>>> On 06/06/2012 11:48 AM, Philippe Gerum wrote: >>>>>> On 06/06/2012 11:18 AM, ali hagigat wrote: >>>>>>> Much appreciate for the reply, Mr. Gerum. Here is the result of ldd >>>>>>> command: >>>>>>> >>>>>> >>>>>> http://www.xenomai.org/pipermail/xenomai-help/2011-12/msg00012.html >>>>> >>>>> Alternatively, this patch may work as well (not tested, but this >>>>> looks like a former issue we had with aggressive optimizers): >>>>> >>>>> diff --git a/src/skins/posix/init.c b/src/skins/posix/init.c >>>>> index 7a338a0..9c7849e 100644 >>>>> --- a/src/skins/posix/init.c >>>>> +++ b/src/skins/posix/init.c >>>>> @@ -43,6 +43,7 @@ void pse51_clock_init(int); >>>>> static __attribute__ ((constructor)) >>>>> void __init_posix_interface(void) >>>>> { >>>>> + volatile pthread_t tid = pthread_self(); >>>>> #ifndef CONFIG_XENO_LIBS_DLOPEN >>>>> struct sched_param parm; >>>>> int policy; >>>>> @@ -80,14 +81,14 @@ void __init_posix_interface(void) >>>>> >>>>> /* Don't use auto-shadowing if we are likely invoked from dlopen. */ >>>>> #ifndef CONFIG_XENO_LIBS_DLOPEN >>>>> - err = __real_pthread_getschedparam(pthread_self(),&policy,&parm); >>>>> + err = __real_pthread_getschedparam(tid,&policy,&parm); >>>>> if (err) { >>>>> fprintf(stderr, "Xenomai Posix skin init: " >>>>> "pthread_getschedparam: %s\n", strerror(err)); >>>>> exit(EXIT_FAILURE); >>>>> } >>>>> >>>>> - err = __wrap_pthread_setschedparam(pthread_self(), policy,&parm); >>>>> + err = __wrap_pthread_setschedparam(tid, policy,&parm); >>>>> if (err) { >>>>> fprintf(stderr, "Xenomai Posix skin init: " >>>>> "pthread_setschedparam: %s\n", strerror(err)); >>>> >>>> There should not be any issue here, as the pthread_self() is passed as >>>> an argument to the called functions, the syscall is not inlined directly. >>>> >>> >>> Did you get any disassembly of the faulty code when suggesting >>> -fno-omit-frame-pointer last time you did? >>> >> No, but I had experienced the problem first hand. >> > > It would be interesting to know why we have to force a frame pointer in > there. I'm not comfortable with voodoo fixing, that bug might bite later > on as gcc's optimizer is unlikely to become less aggressive over time. > Ah this, I know. I have posted a mail where I explained the problem. I am a bit in a short schedule here, will post the link tonight. -- Gilles.