[llvm-commits] PATCH: Stub for ASan/TSan symbolizer

[Alexey Samsonov]

On Thu, May 31, 2012 at 4:46 PM, Chandler Carruth <chandlerc at google.com>wrote:

> On Thu, May 31, 2012 at 5:39 AM, Alexey Samsonov <samsonov at google.com>wrote:
>
>> What's the goal of this stub? Why is it needed, and how will it fit into
>>> the bigger picture?
>>
>>
>> Dynamic tools (AddressSanitizer and ThreadSanitizer) need to symbolize
>> code locations to produce fine stack traces.
>>
>
> I'm not sure I was sufficiently precise here: the key word in my query was
> "stub".
>
> I understand the need for symbolization. I was trying to get the review
> thread (and hopefully the comments in the source files) to reflect why the
> particular stub interface proposed in the location it was proposed was
> needed, and how it might interact with the symbolization library that is to
> grow inside of LLVM's core libraries.
>

OIC. Location is /compiler-rt/lib/sanitizer_common as symbolizer would be
used by runtime libraries of both sanitizer tools, and would likely use
much of low-level code they share. It would also call LLVM debug info
library. In fact, this might be a concern, as that library should be
lightweight enough to be called from ASan/TSan runtime (and, afaiu from
dvukov@ we might have to fix it a bit).

-- 
Alexey Samsonov, MSK
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