[cfe-dev] [libc++]

[Mehdi Amini via cfe-dev]

See here for similar misaligned failure in __tree: https://bugs.llvm.org//show_bug.cgi?id=19302#c9

(I can only assume Eric fixes all of them, but at least we don’t have any blacklist anymore on our UBSAN bots AFAIK)

— 
Mehdi



> On Feb 13, 2017, at 2:31 PM, Vedant Kumar <vsk at apple.com> wrote:
> 
> I have only come across reports of -fsanitize=object-size violations in libcxx, never alignment issues. However, this is a fairly old version of libc++, and the issues may have been fixed already.
> 
> Tobias, can you provide instructions on how to reproduce this issue?
> 
> vedant
> 
> 
>> On Feb 13, 2017, at 8:33 AM, Mehdi Amini via cfe-dev <cfe-dev at lists.llvm.org> wrote:
>> 
>> Hi,
>> 
>> There use to be known UBSAN failures in libc++, they have been fixed as of now AFAIK (most in 3.9).
>> 
>> Best,
>> 
>> — 
>> Mehdi
>> 
>>> On Feb 13, 2017, at 6:56 AM, Tobias Markus via cfe-dev <cfe-dev at lists.llvm.org> wrote:
>>> 
>>> Hi,
>>> 
>>> compiling a C++ application with UBSan enabled, I get a couple of
>>> alignment-related errors from UBSan on std::map-related functions. The
>>> map is of type std::map<int, std::function<void()>>.
>>> 
>>> Relevant messages: https://gist.github.com/hesiod/3f978eace168609af37a2
>>> 1ca26e7adc0
>>> 
>>> This occured with libc++ 3.8.0 and clang/llvm 3.9.1 on Arch Linux.
>>> 
>>> Tobias
>>> 
>>> PS: Please make sure to include me in all replies since I am not
>>> subscribed to cfe-dev.
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>> 
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