[llvm-commits] [cfe-commits] [PATCH] AddressSanitizer Initialization Order Checking

Reid Watson reidw at google.com
Mon Aug 20 13:14:26 PDT 2012

Sorry, minor problem with the compiler-rt patch.

Please commit the attached version of the compiler-rt patch instead of
the previous one.

On Mon, Aug 20, 2012 at 10:57 AM, Reid Watson <reidw at google.com> wrote:
> I've incorporated all the review comments in the attached patches.
> The tool is off by default, and enabled by adding -mllvm
> -asan-initialization-order to clang.
> I don't have commit access, so I'd appreciate it if someone could
> commit these for me.
> All the best,
> Reid
> On Thu, Aug 16, 2012 at 6:09 PM, Reid Watson <reidw at google.com> wrote:
>> I'll add in the prefix before the final version for commit.
>> The goal is to detect globals with dynamic initialization per the C++
>> standard, so that ASan knows which globals can only be accessed during
>> .  It's valid to access a statically initialized global inside of an
>> initializer, even if that global resides in a different TU.  Thus,
>> LLVM/ASan need to be able to distinguish between
>> dynamically/statically initialized globals.  I'm not certain this is
>> optimal, but there haven't been any unexpected false positives with
>> it.  We may be missing a few case, and the optimizer can certainly end
>> up leaving us with false negatives, but those are much better than
>> false positives.
>> On Thu, Aug 16, 2012 at 5:27 PM, Eric Christopher <echristo at apple.com> wrote:
>>> On Aug 16, 2012, at 1:05 AM, Kostya Serebryany <kcc at google.com> wrote:
>>>> +llvm-commits
>>>> Reid,
>>>> The LLVM and compiler-rt patches look good.
>>>> Please fix the remaining small issues (see my code review comments) and commit.
>>>> Hold on with the output tests for a bit since Alexey Samsonov is migrating them to cmake (please coordinate with him and commit as a separate patch).
>>>> The stress test should contain X files, Y linker initialized globals and Z dynamically initialized globals.
>>>> Such test only makes sense where all 3 numbers are large.
>>>> I guess you can commit a single .sh script into compiler-rt/lib/asan/scripts
>>> The metadata should at least be prefixed with something like llvm.asan.<whatever> instead of just the name. That way it's more identifiable.
>>> What's the idea behind the metadata use anyhow?
>>> -eric
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