Path: utzoo!attcan!uunet!snorkelwacker!bu.edu!dartvax!eleazar.dartmouth.edu!llama
From: llama@eleazar.dartmouth.edu (Joe Francis)
Newsgroups: comp.sys.mac.programmer
Subject: Re: MacsBug ignoring breakpoints
Message-ID: <24762@dartvax.Dartmouth.EDU>
Date: 28 Sep 90 18:45:08 GMT
References: <1990Sep28.171459.3335@mdivax1.uucp>
Sender: news@dartvax.Dartmouth.EDU
Organization: Dartmouth College, Hanover, NH
Lines: 23

Brian Gix writes:
>Can anyone tell me the proper way to set breakpoints using MacsBug?
>I have been trying to use it to debug a project I'm doing, and
>although I know the points in the code & suppose to be breaking
>on are being called, the breakpoint seems to have no effect.

Perhaps more detail on what you are doing would help.  I know that
some games (Pirates comes to mind) reset the trace (and other)
exception vectors to make it difficult to "crack" their copy
protection.

Perhaps some development environments do this for their own source level 
debuggers.

Does anyone know what happens to the exception vectors under multifinder
if one program "Chains" another?  Does the child inherit the parents
exception vectors?  Or does multifinder stuff in some set of "golden"
vectors?

Inquiring minds want to know.

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