[Gc] Bus error && Deallocation of excessively large block ..

Arote Uddhav aroteuddhav at gmail.com
Sat Jul 14 02:13:19 PDT 2012


Hi,
    Ok great !

On Sat, Jul 14, 2012 at 2:38 PM, Ivan Maidanski <ivmai at mail.ru> wrote:

> Hi Arote,
>
> 1. GC_THREADS forces gc.h to include pthread.h and redirect pthread_create
> to GC_pthread_create.
> If GC_THREADS is not defined then single-threaded mode is assumed.
>
> 2. If you want to make standard malloc behave like GC_MALLOC, please look
> to --enable-redirect-malloc GC option.
>
> Regards,
> Ivan
>
> Sat, 14 Jul 2012 14:34:04 +0530 Arote Uddhav <aroteuddhav at gmail.com>:
>
>   Hi ,
>
> GC cannot collect those memory allocations which are allocated by explicit
> use of malloc ?
> With threads I am using few external libraries which are sort of leaky ..
> can we make GC to be a global garbage collector ,by this I mean , GC will
> recollect all the memory locations which are not pointed by any
> pointers,not necessarily  using GC_MALLOC
>
> On Sat, Jul 14, 2012 at 2:28 PM, Arote Uddhav <aroteuddhav at gmail.com<http://e.mail.ru/cgi-bin/sentmsg?compose&To=aroteuddhav@gmail.com>
> > wrote:
>
> Hi ,
> well .. it worked  !
> But why is this restriction
> #define GC_THREADS
> #include "gc.h"
>
> why should we follow this order ... special reason ?
>
> On Sat, Jul 14, 2012 at 2:19 PM, Ivan Maidanski <ivmai at mail.ru<http://e.mail.ru/cgi-bin/sentmsg?compose&To=ivmai@mail.ru>
> > wrote:
>
> Hi Arote,
>
> Sat, 14 Jul 2012 14:08:03 +0530 Arote Uddhav <aroteuddhav at gmail.com<http://e.mail.ru/cgi-bin/sentmsg?compose&To=aroteuddhav@gmail.com>
> >:
> > Hi All ,
> >
> > Until now I have used only GC_MALLOC and GC_INIT functions in the
> program code.
> > platform : ubuntu Linux
>
> ok.
>
> >
> >
> > In the file where I declared this piece of code I used
> >    #define GC_THREADS
>
> must be before #include <gc.h>
>
> >
> >
> > Well,.is it we need to initialize GC at evry function where it is
> used..I have used only at the start of the main function...?
>
> GC_INIT(); must be only at the beginning of main().
>
> >
> >
> > Thank you ,Uddhav!
> >
> >
> > On Sat, Jul 14, 2012 at 1:53 PM, Ivan Maidanski <ivmai at mail.ru<http://e.mail.ru/cgi-bin/sentmsg?compose&To=ivmai@mail.ru>>
> wrote:
> > Hi Arote,
> >
> >  "Collecting unknown thread" means you call some GC function from a
> thread not registered by GC.
> >
> >  What's your target platform?
> >  Check that pthread_create is redirected to GC_pthread_create.
>
> Have you checked this?
>
> Regards,
> Ivan
>
> >
> >  The given code fragment seems to be valid (Are there any other places
> GC is called?)
> >
> >  Regards,
> >  Ivan
> >
> >  Sat, 14 Jul 2012 13:46:02 +0530 Arote Uddhav <aroteuddhav at gmail.com<http://e.mail.ru/cgi-bin/sentmsg?compose&To=aroteuddhav@gmail.com>
> >:
> >
> > > No luck.. !
> >  >
> >  > On Sat, Jul 14, 2012 at 1:29 PM, Ivan Maidanski <ivmai at mail.ru<http://e.mail.ru/cgi-bin/sentmsg?compose&To=ivmai@mail.ru>>
> wrote:
> >  >
> >
> >
> > > > Hi Arote,
> >  > >
> >  > > Please ensure that you have in the code:
> >  > >
> >  > > #define GC_THREADS
> >  > > #include <gc.h>
> >  > >
> >  > > ...
> >  > >
> >  > > main() {
> >  > > GC_INIT();
> >  > >
> >  > > Regards,
> >  > > Ivan
> >  > >
> >  > > Wed, 11 Jul 2012 15:11:12 +0530 Arote Uddhav <aroteuddhav at gmail.com<http://e.mail.ru/cgi-bin/sentmsg?compose&To=aroteuddhav@gmail.com>
> >:
> >  > > > Hi All ,
> >  > > >  I am trying gc with my program. I need to create threads at run
> time.
> >  > > >
> >  > > >
> >  > > >    <code>
> >  > > >                 while(1)
> >  > > >                 {
> >  > > >  pthread *t = (pthread_t  *) GC_MALLOC( num_of_files * sizeof
> (pthread_t
> >  > > ));
> >  > > >    int  *iret = (int *) GC_MALLOC(  num_of_files * sizeof (int ));
> >  > > >
> >  > > >                       .........
> >  > > >
> >  > > >                      while( ( dirp = readdir( d )) != NULL )
> >  > > >             {
> >  > > >  if ( ( stat( dirp->d_name , &stat_buf) != -1 ) &&  (S_ISREG(
> >  > > > stat_buf.st_mode ) ))
> >  > > > {
> >  > > >  iret [ fileCounter  ]  = pthread_create ( &t [ fileCounter ] ,
> NULL ,
> >  > > > callPluginHandle , (void *)(dirp->d_name) ) ;
> >  > > >  fileCounter ++;
> >  > > >    }
> >  > > >              }
> >  > > >                     ...........
> >  > > >    }
> >  > > >   </code>
> >  > > >
> >  > > >    This is a code  prototype which I am trying to write. But I
> get run
> >  > > time
> >  > > > problmes
> >  > > >  ----- Bus error
> >  > > >  ----- Deallocation exclusively large block
> >  > > >  ----- Collecting unknown thread
> >  > > >
> >  > > > I am not doing any free or deallocation .. I am relying on gc for
> all
> >  > > > memory freeing !
> >  > > > Help required ! :)
> >  > > >
> >  > > > --
> >  > > > *Uddhav Arote*
> >  > > >
> >  > > > Mob Number :  +91 9767168079
> >  > > > *Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).*
> >  > >
> >  >
> >  >
> >  >
> >  > --
> >  > *Uddhav Arote*
> >  >
> >  > Mob Number :  +91 9767168079
> >  > *Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).*
> >  >
> >  >
> >
> > > Life is no brief candle for me. It is a sort of splendid torch which I
> have
> >  > got hold of for the moment, and I want to make it burn as brightly as
> >  > possible before handing it on to future generations.
> >  >      -George Bernard Shaw
> >  >
> > > * <Email-id:aroteuddhav at gmail.com<http://e.mail.ru/cgi-bin/sentmsg?compose&To=Email-id%3Aaroteuddhav@gmail.com>
> >*
> >  >
> >  >
> >
> >
> >
> >
> > --
> >
> > Uddhav Arote
> >
> > Mob Number :  +91 9767168079
> > Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).
> >
> >
> > Life is no brief candle for me. It is a sort of splendid torch which I
> have got hold of for the moment, and I want to make it burn as brightly as
> possible before handing it on to future generations.
> >       -George Bernard Shaw
> >
> >
> >
> >
>
>
>
>
> --
> *Uddhav Arote*
>
> Mob Number :  +91 9767168079
> *Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).*
>
>
> Life is no brief candle for me. It is a sort of splendid torch which I
> have got hold of for the moment, and I want to make it burn as brightly as
> possible before handing it on to future generations.
>      -George Bernard Shaw
>
> *<http://e.mail.ru/cgi-bin/sentmsg?compose&To=Email-id%3Aaroteuddhav@gmail.com>
> *
>
>
>
>
> --
> *Uddhav Arote*
>
> Mob Number :  +91 9767168079
> *Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).*
>
>
> Life is no brief candle for me. It is a sort of splendid torch which I
> have got hold of for the moment, and I want to make it burn as brightly as
> possible before handing it on to future generations.
>      -George Bernard Shaw
>
> *<http://e.mail.ru/cgi-bin/sentmsg?compose&To=Email-id%3Aaroteuddhav@gmail.com>
> *
>
>
>


-- 
*Uddhav Arote*

Mob Number :  +91 9767168079
*Vidyavardhini College Of Engg. and Tech,Mumbai(MAHARASHTRA).*


Life is no brief candle for me. It is a sort of splendid torch which I have
got hold of for the moment, and I want to make it burn as brightly as
possible before handing it on to future generations.
     -George Bernard Shaw

* <Email-id%3Aaroteuddhav at gmail.com>*
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