[Spread-users] Another way to leak

[David Shaw]

Here's a variation on the theme of the various leak generating
programs I've been posting.

This one is the simplest so far.  It doesn't even send any data.  All
it does is connect to spread, and then join and leave a group over and
over.  Membership messages are not even turned on.  It takes a while,
but you can watch spread's memory usage go up and up until the machine
starts swapping to death.  The memory is never returned.

David
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#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <sp.h>

int main(int argc,char *argv[])
{
  int mbox,err,count=0;
  char myself[MAX_GROUP_NAME];

  err=SP_connect(NULL,NULL,0,0,&mbox,myself);
  if(err!=ACCEPT_SESSION)
    {
      printf("Spread error %d on connect\n",err);
      exit(1);
    }

  for(;;)
    {
      err=SP_join(mbox,"hithere");
      if(err!=0)
	{
	  printf("Spread error %d on join\n",err);
	  break;
	}

      err=SP_leave(mbox,"hithere");
      if(err!=0)
	{
	  printf("Spread error %d on leave\n",err);
	  break;
	}

      count++;
      if(count%100000==0)
	printf("%d cycles completed\n",count);
    }

  err=SP_disconnect(mbox);
  if(err!=0)
    {
      printf("Spread error %d on disconnect\n",err);
      exit(1);
    }

  return 0;
}