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[Gcl-devel] Re: shared memory load address and gcl

From: Camm Maguire
Subject: [Gcl-devel] Re: shared memory load address and gcl
Date: Tue, 02 Feb 2010 15:48:48 -0500
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (gnu/linux)

Greetings, and thanks so much for your reply!

I think my conceptual question is now clearer.  My experience with
linux tells me that sbrk'ed memory cannot overrun the address used for
shared memory maps.  But on asdfasdf, there appears at first blush no
such problem.  Can this possibly be right?  Should I ignore this
apparent ceiling to the lisp heap on bsd?

#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/time.h>
#include <sys/resource.h>

int main() {
  struct rlimit rl;
  void *p,*p1,*p2;

  getrlimit(RLIMIT_DATA, &rl);
  p=(void *)sbrk(0);
  p1=(void *)sbrk(0x1000000);
  p2=(void *)sbrk(0x1000000);
  printf("%ld %ld %p %p %p\n",rl.rlim_cur,rl.rlim_max,p,p1,p2);

  return 0;

34359738368 34359738368 0x600a88 0x600a88 0x1600a88

echo $?

ldd ./yy
libc.so.0.1 => /lib/libc.so.0.1 (0x0000000801256000)
/lib/ld-kfreebsd-x86-64.so.1 => /lib64/ld-kfreebsd-x86-64.so.1 

Thanks again!
Camm Maguire                                        address@hidden
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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