On Mon, 14 May 2001, Garrett Wollman wrote:
> <<On Thu, 10 May 2001 12:40:42 -0400 (EDT), Robert Watson <[EMAIL PROTECTED]> said:
>
> > The process and signal-related structures may be inconsistent if the
> > debugger disregards existing locks held over those structures. It does
> > not matter if code is currently still executing, it matters that
> > preemption can occur. The choices appear to be:
>
> Preemption should never occur while the debugger is running. If those
> structures are in an inconsistent state, it *should* be visible to the
> debugger.
Yes, exactly. The debugger my preempt, and the structures may be in an
inconsistent state. Therefor, caution must be used when making use of
functions that assume a consistent state, or attempt to make use of locks
which may already be held but cannot be released.
Robert N M Watson FreeBSD Core Team, TrustedBSD Project
[EMAIL PROTECTED] NAI Labs, Safeport Network Services
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