asan false positive with -static-libstdc++ and exceptions

[ramosian-glider]

Originally reported on Google Code with ID 147

% clang++ -O -fsanitize=address small_throw_test.cc -static-libstdc++  ; 
./a.out

==5551== ERROR: AddressSanitizer: stack-buffer-underflow ... 

The problem is that when we are linking libstdc++ statically, 
the interceptor for __cxa_throw does not kick in.
In most cases it is not a problem because we also instrument all calls to __cxa_throw
at compile time, but if such a call was not instrumented
(as in this test), we get a false report. 

One solution would be to reimplement __cxa_throw in asan instead of 
wrapping the standard implementation, but that sounds too messy.

I am not going to act on this bug, unless we find a clean solution. 

Reported by konstantin.s.serebryany on 2013-01-29 09:08:04

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- _Attachment: [small_throw_test.cc](https://storage.googleapis.com/google-code-attachments/address-sanitizer/issue-147/comment-0/small_throw_test.cc)_

[morehouse]

@kcc: This doesn't reproduce for me anymore. Can we close this?

[kcc]

I don't remember fixing it, but probably something else has changed.
Let's close -- we don't have plans to work on it anyway

[vitalybuka]

Probably this was fixed by https://github.com/llvm-project/llvm-project-20170507/commit/9ec695b2f31843cec7810d7b047b208e8cce75cd