Eric Fiselier 84a2dadcee Disable unsigned integer sanitizer for basic_string::replace(). Patch from tomcherry@google.com ...

basic_string::replace() has the below line

__sz += __n2 - __n1;

which fails overflow checks if __n1 > __n2, as the negative result
from the subtraction then overflows the original __sz when added to
it.

This behavior is valid as unsigned integer overflow is defined to wrap
around the maximum value and that produces the correct final value for
__sz.  Therefore, we disable this check on this function.

llvm-svn: 297355

2017-03-09 01:54:13 +00:00

149 KiB

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