From: agent <agentprog@gmail.com>
To: musl@lists.openwall.com
Subject: Re: build musl with clang
Date: Sat, 25 Aug 2012 00:55:34 +0600 [thread overview]
Message-ID: <5037CE26.3060702@gmail.com> (raw)
In-Reply-To: <20120824175150.GE27715@brightrain.aerifal.cx>
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
next prev parent reply other threads:[~2012-08-24 18:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-23 7:53 agent
2012-08-23 9:23 ` Szabolcs Nagy
2012-08-23 10:25 ` agent
2012-08-23 12:24 ` Rich Felker
2012-08-23 13:11 ` agent
2012-08-23 13:56 ` John Spencer
2012-08-23 14:42 ` Szabolcs Nagy
2012-08-23 15:12 ` agent
2012-08-23 17:55 ` Rich Felker
2012-08-24 5:58 ` agent
2012-08-24 6:06 ` Rich Felker
2012-08-24 10:37 ` agent
2012-08-24 11:01 ` Szabolcs Nagy
2012-08-24 12:22 ` agent
2012-08-24 12:35 ` Rich Felker
2012-08-24 12:39 ` agent
2012-08-24 14:59 ` Szabolcs Nagy
2012-08-24 17:51 ` Rich Felker
2012-08-24 18:55 ` agent [this message]
2012-08-24 19:04 ` Szabolcs Nagy
2012-08-25 0:09 ` Rich Felker
2012-08-25 5:57 ` agent
2012-08-25 8:03 ` Szabolcs Nagy
2012-08-29 16:21 ` agent
2012-08-29 16:59 ` Rich Felker
2012-08-29 17:50 ` agent
2012-08-24 17:37 ` Luca Barbato
2012-08-24 17:52 ` Rich Felker
2012-08-23 12:24 ` John Spencer
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