To:	chrisa AT meaddata DOT com (Chris Anderson)
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: Malloc Tracing
Date:	Mon, 15 Aug 1994 10:49:56 PDT
From:	"Marty Leisner" <leisner AT sdsp DOT mc DOT xerox DOT com>

In message <9408151443 DOT AA21869 AT moscow DOT meaddata DOT com>you write:
>Three questions:
>
>1)  I just put 1.12 on a Dell 486-33.  When I compile it complains
>with the message:
>
>	Unsupported INT 0x06
>	Invalid Opcode at eip=d867
>


int 6 is the invalid opcode...What are you running?  I have
compaq-dos 6.2 with windows 3.1, and I think int 6 just hangs
the machine...

>
>2) I had recieved a note about a program that traces calls to malloc  and
>free and reports if they match or not.  Can someone give me the name
>of this program or a pointer to where I can find it.


I have this ported to djgpp...

Its very nice:

-------------------------------------------------------------------------------
$Id: README,v 1.38 1994/03/20 17:13:33 gray Exp $
-------------------------------------------------------------------------------

MALLOC_DEBUG:

The malloc_dbg library has been designed as a drop in replacement for
the system's malloc, realloc, calloc, free and other memory management
routines while providing powerful heap-memory debugging facilities.

It is also reasonably portable having been successfully run on the
following operating systems: BSDI, SunOS, Solaris, AIX, Ultrix, OSF,
Irix, HPUX, and probably a couple others.

-------------------------------------------------------------------------------

See the INSTALL file for installation notes.

-------------------------------------------------------------------------------

ANTAIRE REPOSITORY:

Currently, you can get the newest versions of the malloc_dbg library
from anonymous ftp via ftp.antaire.com in the /antaire/src/malloc_dbg
directory.

The versions in this repository also include such files as a
postscript version of the manual and other large files which may not
have been included in the distribution you received.

OTHER REPOSITORIES:

You can also get a recent version from anonymous ftp via
gatekeeper.dec.com in the /pub/misc/malloc_dbg directory.  This
repository has been made available through the generosity of the
Digital Equipment Corporation with special help from Dave Hill and the
gatekeepers.

Thanks much to them all.

-------------------------------------------------------------------------------

DOCUMENTATION:

Examine the malloc.info file.  Is is a gnu-info file having the
user-documentation for the malloc subsystem.  It can be installed in
the emacs info directory and read with emacs/info or the info program
available from the texinfo package at GNU archive sites.  It is also
suitable for reading as text.

It can be reproduced from the malloc.texi texinfo file which also can
generate TeX hardcopy output with the help of the texinfo.tex file.

A malloc.ps postscript file may also have been included for you
TeX-less folks.

Important sections from malloc.info:

* Overview::                    General debugging concepts.
* Debug Tokens::                Description of the debugging token flags.
* Extensions::                  Additional non-standard routines.
* Malloc_dbg Program::          Env variable setting utility.
* Debugging with the Library::  How to debug problems with the library

-------------------------------------------------------------------------------

GENERAL:

- the system is pretty dependent on a good ansi-c compiler like gcc.
	Non-ansi folks might have to:

	- add some sort of ansi option to your compiler.  if there
		is one let me know and I will add it to the configure
		script.
	- first try 'make noansi' which will try and run the
		Deansify.pl perl script.  It takes care of:
			- changing stdarg.h and ... to varargs.h and va_alist
			- changing all (void *) references to (char *).
			- fixing all functions to remove foo(char * var) decls.
	- if it doesn't work you may have to do Deansify.pl's job by hand.

- the file Manifest contains a list of each of the files and what it does.

- configure can be regenerated by the autoconf script (versions 1.6 and above)

- this malloc has never been (and maybe never will be) optimized for
	space nor speed.  it is *very* wasteful and while handling
	large allocations or tons of concurrent small allocations, the
	heap can quickly become huge.

-------------------------------------------------------------------------------

ARGV LIBRARY:

My argv library which should have been included with this package
(argv.[ch], argv_loc.h).  I use it with all my binaries.  It is like
getopt in that it provides a standardized way of processing arguments
but I find it significantly better.  You have to write no C code to do
the actual processing, it handles short -l and long --logfile style
options, gives standard short and long usage messages, and many other
features while trying to comply with POSIX specs.

For copies of the library, try ftp.antaire.com in the
/antaire/src/argv directory.

-------------------------------------------------------------------------------

THANKS:

Many net folk contributed to the library and my thanks goes out to
them all.

Special thanks, however, to my core contributors/testers: Scott
Michel, Greg Sylvain, Bali Jatinder, Marc Evans, Dave Hill, Manfred
Hauswirth, Richard Birnbaum, and Francois Pinard.

-------------------------------------------------------------------------------

AUTHOR:

If you have any questions, comments, or problems feel free to send me
mail.

gray DOT watson AT antaire DOT com

-------------------------------------------------------------------------------

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