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From: | grischka |
Subject: | Re: [Tinycc-devel] tricky little bounds-checking bug |
Date: | Thu, 07 Apr 2011 16:05:53 +0200 |
User-agent: | Thunderbird 2.0.0.24 (Windows/20100228) |
grischka wrote:
Before you invest too much time however note that Fabrice once said that there is some flaw in the implementation of in the bounds checker with (as I understood it) possible impact on reliability of detection. I don't know what exactly he meant though.
FYI, this was Fabrice's original message (from 2007/11): "Another point is that I realized that the bound check region algorithm used in TCC is completely broken (the code to search the region associated to a pointer does not work in all cases). I think the only way to make it work reliably is to tag each allocated byte with one bit."
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