[PATCH] [compiler-rt] Implement AddressSanitizer suppressions

[Kuba Brecka]

> Suppose you run your code and see a bug in function foo() from OpenCL, which is a precompiled library you can't fix. You suppress foo(), rerun the code and see a bug in function bar() in OpenCL. Hm. If you can't fix OpenCL anyway, isn't it better to suppress all reports from it completely? 

That absolutely makes sense, but only if we allow suppressions by function name as well, which I was under the impression you were suggesting to remove.

> I *have* seen many cases where ASan wasn't able to finish printing a report because application was killed earlier

I see. Do we have an example of that? Or a testcase? Does by any chance the fact that we're doing the suppression only for interceptors make it less likely?

> - leave the ability to disable specific interceptor by name, with no symbolization necessary
> - symbolize the stack trace in the interceptor *only* if user has provided a suppression

That makes sense, I'll post an updated patch.

http://reviews.llvm.org/D6280