Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!uxc.cso.uiuc.edu!uxc.cso.uiuc.edu!m.cs.uiuc.edu!rudolph
From: rudolph@m.cs.uiuc.edu
Newsgroups: comp.sys.mac.programmer
Subject: malloc in LSC
Message-ID: <73300002@m.cs.uiuc.edu>
Date: 18 Jul 89 05:26:00 GMT
Lines: 21
Nf-ID: #N:m.cs.uiuc.edu:73300002:000:1001
Nf-From: m.cs.uiuc.edu!rudolph    Jul 18 00:26:00 1989


Are there any known problems with malloc, calloc, etc in LSC?  I have a
program that is basically Unix-style - the only Mac-type stuff is a call
to SFGetFile.  When I call malloc(), I get strange results.  If I
statically allocate the array, it works fine.  It also works fine using
malloc() with the exact same code (minus SFGetFile) on a Unix machine.

At first, malloc() was returning suspiciously low addresses (4 digit hex
numbers, so < 64K).  When I wrote to these addresses, the Mac eventually
crashed.  The I tried removing all my INITs, and it started returning
ridiculously high address (8 hex digits starting with ffff).  Reading
from these produced garbage.  I'm only trying to allocate about 500
bytes at a time.

This is all on a Plus with 1M and no multifinder, sys 6.0.  I'm not
experienced at Mac programming, but I am at 'C,' and I can't find
anything wrong with what I'm doing, especially since it works under
Unix.

David Rudolph       rudolph@m.cs.uiuc.edu
University of Illinois