Sender:	crough45 AT amc DOT de
Message-Id:	<97Aug21.092223gmt+0100.17025@internet01.amc.de>
Date:	Thu, 21 Aug 1997 08:26:55 +0100
From:	Chris Croughton <crough45 AT amc DOT de>
Mime-Version:	1.0
To:	billc AT blackmagic DOT tait DOT co DOT nz
Cc:	fesenko AT pacific DOT net DOT sg, djgpp AT delorie DOT com
Subject:	Re: [Q] wrapping functions with linker

Bill Currie writes:

> That's your problem: fopen calls malloc which (for you) calls fopen 
> which calls malloc... I got tipped off by esp in your stack dump 
> being so low.

Been there, done that - my solution was to explicitly test
for recursion, and only do the print if it's not recursing.
So in malloc do something like:

void*
malloc(size_t size)
{
  static bool recurse = false;
  if (!recurse)
  {
    recurse = true;
    mprintf(...);
    recurse = false;
  }
  /* do alloc stuff... */
}

This stops it trying to print while printing.  You might also want to
provide a sparate function to allocate memory while 'recurse' is set,
this can be very simple and reset itself after returning from the
print (on the assumption that the C library functions are well-behaved).

Chris C

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