Re: debuggers

zstern@adobe.com (Zalman Stern)
Thu, 11 Nov 1993 00:54:05 GMT

          From comp.compilers
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Newsgroups: comp.compilers
From: zstern@adobe.com (Zalman Stern)
Keywords: debug
Organization: Adobe Systems Incorporated
References: 93-11-062
Date: Thu, 11 Nov 1993 00:54:05 GMT

John Levine writes
> I believe that they think that with some cooperation from the paging system
> they can provide useful watchpoints via page faults. -John]


I'm fairly sure SGI has OS support for breakpoints on accessing a page or
part of a page. (Used in their CASEVision debugger.) I expect the reason
watchpoint hardware isn't widely used in the UNIX world is lack of a good,
consistent interface that is implemented with few enough bugs on more than
one OS. You also run into wierd issues like how many watchpoints can be set
at once etc...
--
Zalman Stern zalman@adobe.com (415) 962 3824
Adobe Systems, 1585 Charleston Rd., POB 7900, Mountain View, CA 94039-7900
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