[llvm-commits] PATCH: Stub for ASan/TSan symbolizer
dvyukov at google.com
Thu May 31 06:38:36 PDT 2012
On Thu, May 31, 2012 at 5:32 PM, 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).
We don't use libstdc++, STL, libc, global ctors, big stack frames, etc.
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