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From: omullarn@oracle.oracle.com (Oliver Mullarney)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Tail patches
Summary: "Inventive" alternatives
Keywords: Patches, Tails, "The Right Thing to Do"
Message-ID: <1989Nov11.214632.19112@oracle.com>
Date: 11 Nov 89 21:46:32 GMT
References: <1459@sequent.cs.qmc.ac.uk> <36250@apple.Apple.COM> <5056@internal.Apple.COM> <1989Nov7.212837.5146@oracle.com> <5080@internal.Apple.COM> <1467@sequent.cs.qmc.ac.uk> <2839@taux01.UUCP>
Reply-To: omullarn@oracle.com (Oliver Mullarney)
Followup-To: comp.sys.mac.programmer
Organization: Oracle Corporation, Belmont, CA
Lines: 27

In article <1467@sequent.cs.qmc.ac.uk> jeremyr@cs.qmc.ac.uk (Jeremy Roussak) writes:
>As for "sometimes you just gotta," all I can say is: don't do whatever it 
>is you're doing that's "just gotta."  Find a "more inventive" way.

Well, we've had a few responses to the toilet flush tail patch issue, so
perhaps someone can tell me how I can avoid the tail patches I said I
"just gotta" do.
I'm trying (so far, successfully) to patch a number of traps in order to
monitor memory usage on the Mac. I need to create log files listing everything
I can find out about memory allocation, reallocation and freeing. Sizes,
stack traces and, most importantly (in this discussion) the value of the
returned Handle or Pointer.
Hence - tail patch NewHandle and NewPtr so that I can examine A0 for the
result. I can't think of any other way (apart from sticking a JSR at the the
end of the NewHandle and NewPtr glue, which I don't think I can modify. I
may also end up patching NewRgn, NewWindow etc. and don't know what the
story is on glue routines for these calls).

Any alternatives in this case?
(Not that it's crucial - these patches will never make it out into the real 
world - They're for development purposes only.)


| Oliver Mullarney     |  "I have knowledge of Digital Watches,  and soon I   |
| Oracle Corporation   |   shall have knowledge of Video Cassette Recorders"  |
| omullarn@oracle.com  |                                      Time Bandits    |
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