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Date: Sat, 25 Aug 2012 00:55:34 +0600
From: agent <agentprog@...il.com>
To: musl@...ts.openwall.com
Subject: Re: build musl with clang
24.08.2012 23:51, Rich Felker пишет:
> Yes. To clarify, the issue is not that clang is assuming the object
> obtained by malloc has indeterminate value. The issue is that clang is
> assuming the pointer malloc returns points to an object of size N
> beginning at the returned address, and thus that the [-1] index is
> invalid pointer arithmetic. This is a malloc-specific assumption and
> wrong for freestanding mode where malloc is just an ordinary function
> (which is allowed to return a pointer into the middle of an array,
> which is what it's doing).
i will report this to clang's list (or maybe directly to bugzilla?) as
soon as i get a subscription confirmation. but i have noticed that not
only 'if (p[-1])' gets wiped out but any 'if (p[i])'. though the nature
of this i suppose the same
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