Path: utzoo!attcan!uunet!samsung!munnari.oz.au!cluster!metro!bunyip!moondance!uqcspe!qfagus!gordon
From: gordon@qfagus.OZ (Peter Gordon)
Newsgroups: comp.lang.c
Subject: Malloc in Turbo C
Keywords: Turbo C Malloc
Message-ID: <26316@qfagus.OZ>
Date: 27 Feb 90 05:54:32 GMT
Organization: Department of Forestry, Brisbane, Australia
Lines: 33


Please tell me I'm doing something stupid.  The following code works on
Microsoft C and a MIPS/1000 runnung UNIX Sys V Release 4_0.
On Turbo C  (ver 2) it crashes after a variable number of frees.  I've tried
all memory models and far pointers and can't think of much else to
try.  Commonsense tells me that such a basic bug would not be
in Version 2, would some kind person point me in the right direction.
(I've tried the code on 8088, and 80386 machines, both with and without
floating point emulation.)
Peter Gordon.
------------------- cut here ------------------------------
echo "Extracting tst.c"
sed -e 's/^X//' > tst.c << END_OF_FILE
X#include	<stdio.h>
X#ifdef __TURBOC__
X#include	<alloc.h>
X#else
X#include	<malloc.h>
X#endif
X#include	<stdlib.h>
Xmain()
X{
X	char **head, **cp;
X	int	i;
X	head = (char **)malloc(200 * sizeof(char **));
X	for(cp = head, i = 0; i < 200; ++i, ++cp)
X	{
X		fprintf(stdout,"Freeing %d\n", i);
X		fflush(stdout);
X		free(cp);
X	}
X}
END_OF_FILE