setrlimit & RLIMIT_DATA

Subject: setrlimit & RLIMIT_DATA
From: Victor Eijkhout <email@hidden>
Date: Thu, 19 Apr 2007 18:25:19 -0500
Delivered-to: email@hidden
Delivered-to: email@hidden

This code:

  ierr = getrlimit(RLIMIT_AS,&limitstruct); CHKERR(ierr);
  printf("AS limit: soft=%d, hard=%d\n",
	 limitstruct.rlim_cur,limitstruct.rlim_max);
  limitstruct.rlim_cur = 1; limitstruct.rlim_max = 1;
  ierr = setrlimit(RLIMIT_AS,&limitstruct); CHKERR(ierr);
  ierr = getrlimit(RLIMIT_AS,&limitstruct); CHKERR(ierr);
  printf("limit: soft=%d, hard=%d\n",
	 limitstruct.rlim_cur,limitstruct.rlim_max);

  amt = 700000; printf("allocating %d\n",amt);
  ptr = (int*)malloc(amt*sizeof(int));
  /*memset(ptr,1,amt);*/
  for (i=0; i<amt; i++) ptr[i] = 2;

should bomb but doesn't. I found a 4-year old posting about this same bug in Darwin:

http://lists.apple.com/archives/unix-porting/2003/Mar/msg00018.html

I guess this one is not high op Apple's priority list. Does anyone know a workaround?

Victor.
--
Victor Eijkhout, 512 471 5809 (w), 512 499 0504 (h)
Texas Advanced Computing Center, The University of Texas at Austin


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