Re: SegFault in 2**111111111 calculation

[Torbjorn Granlund]

Pearu Peterson <address@hidden> writes:

  On Wed, 6 Dec 2000, Pearu Peterson wrote:
  
  > Also note that SegFault happens before the malloc call (see the
  > supplied gmpy_allocate function).
  
  Sorry, this is not obvious. But with
  
  static void * gmpy_allocate(size_t size)
  {
      void *res;
      fprintf(stderr, "mp_allocate( %d )\n", size);
      res = (void *)malloc(size);
      fprintf(stderr, "mp_allocate( %d ) ->%8p\n", size, res);
      return res;
  }
  
  I'll get
  
  Calculating 2**111111111:
  mp_allocate( 4 )
  mp_allocate( 4 ) ->0x8049ba0
  Segmentation fault
  
  Which shows that the problem is not in malloc, at least not in the one
  called in gmpy_allocate.

It doesn't show that.
Try doing a memset(res,17,size) after the malloc.
I suspect you'll get the crash there instead.

-- 
Torbjörn