[llvm-dev] sanitizer test case failures after OS update

[Bill Seurer via llvm-dev]

On 09/13/2017 10:42 AM, Peter Bergner wrote:
> On 9/13/17 10:31 AM, Peter Bergner via llvm-dev wrote:
>> On 9/12/17 8:15 PM, Bill Seurer via llvm-dev wrote:
>>> I updated one of my powerpc64le llvm test systems to Fedora 25 and I
>>> started getting a whole bunch of sanitizer test case failures.  I tried
>>> testing some earlier revisions on the new OS that had worked fine under
>>> the old but they generate the same errors now so it isn't any changes in
>>> llvm.
>>>
>>> There are two different errors:
>>>
>>> FATAL: ThreadSanitizer: unsupported VMA range
>>> FATAL: Found 47 - Supported 44 and 46
>>
>> This looks to be due to the new kernel using 47 bits for addressing
>> and the ppc specific ASAN code is only setup to handle 44 or 46.
>> Talking with Steve Munroe, he says there is some work (already done?)
>> to handle 48 and 49 bits as well.  We'll need a change ASAN to
>> handle those extra bits.  It would be nice if we could just detect
>> what the value is and use that, rather than having fixed specific
>> values we know about and handle.
> 
> Oops, I meant TSAN above, although ASAN has similar code and
> restrictions IIRC.


Ok.  Note that I also see these failures after an Ubuntu 16.04 kernel 
update.

-- 

-Bill Seurer