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[Sanitizer] Fix a possible write to freed memory in the wcrtomb interceptor

Authored by labath on Mar 29 2019, 2:56 AM.



r357240 added an interceptor for wctomb, which uses a temporary local
buffer to make sure we don't write to unallocated memory. This patch
applies the same technique to wcrtomb, and adds some additional tests
for this function.

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labath created this revision.Mar 29 2019, 2:56 AM
Herald added projects: Restricted Project, Restricted Project. · View Herald TranscriptMar 29 2019, 2:56 AM
vitalybuka accepted this revision.Apr 5 2019, 5:47 PM
This revision is now accepted and ready to land.Apr 5 2019, 5:47 PM
This revision was automatically updated to reflect the committed changes.