On Sun, Aug 17, 2014 at 6:27 PM, Eric Fiselier <[email protected]> wrote: > > Just as a small data point, with an instrumented program and > uninstrumented libc++ I see 575 msan failures without extern templates, > and 724 with. If libc++ is instrumented, it's more like 200 (and many of > these look like they're just because I've messed up using the > instrumented library with the instrumented executable). > > A large amount of the test failures w/ MSAN are because some tests replace > operator new and operator delete. This causes a linking error. > I don't have specific numbers for the amount of tests that do this but you > should take that into consideration. >
FWIW, I don't think that MSan was *ever* intended to not have false positives with an uninstrumented standard library. So I really don't understand why this is an interesting thing to dig into.
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